CN108894237B - Fixing device of mine side slope support net - Google Patents
Fixing device of mine side slope support net Download PDFInfo
- Publication number
- CN108894237B CN108894237B CN201811092003.7A CN201811092003A CN108894237B CN 108894237 B CN108894237 B CN 108894237B CN 201811092003 A CN201811092003 A CN 201811092003A CN 108894237 B CN108894237 B CN 108894237B
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- plug
- fixing
- edge
- seat
- center
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- 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
- E02D17/20—Securing of slopes or inclines
- E02D17/202—Securing of slopes or inclines with flexible securing means
-
- 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
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/23—Dune restoration or creation; Cliff stabilisation
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- 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)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Legs For Furniture In General (AREA)
Abstract
The invention discloses a fixing device of a mine side slope support net, which comprises a center fixing mechanism and four edge fixing mechanisms uniformly distributed on the periphery of the center fixing mechanism along the circumferential direction; the center fixing mechanism comprises a center fixing seat and a guide plug-in unit arranged at the bottom of the center fixing seat, an auxiliary limiting mechanism is arranged in the center fixing seat, four reinforcing plug-in units are uniformly distributed on the edge of the top of the center fixing seat along the circumferential direction, a limiting seat is horizontally arranged above the center fixing seat, and the top of each reinforcing plug-in unit penetrates through the corresponding limiting seat and is connected with a fixing nut. According to the invention, the supporting net of the mine side slope can be effectively fixed, the center of the device is reinforced, the whole device is firmly connected with the ground under the action of the auxiliary limiting mechanism, the fixing strength of the whole device is ensured, the mesh structures with different shapes can be rapidly fixed, the installation is rapid, the time and the labor are saved, and the practical and popularization values are good.
Description
Technical Field
The invention belongs to the field of mining equipment, and particularly relates to a fixing device for a mine side slope support net.
Background
The mine slope support net is characterized in that various flexible nets mainly comprising steel wire rope nets are covered or wrapped on slopes or rocks to be protected so as to limit weathering flaking or damage of slope rock-soil bodies and dangerous rock collapse, and the mine slope support net has a reinforcing effect and a containment effect.
In the existing mine slope supporting net technology, most mine slopes are fixed by a larger fixing device after being pressed by the supporting nets with meshes of different sizes in order to avoid loose hanging nets of the supporting nets, and are fixed by a plurality of fixing bolts, so that cost is wasted, inconvenient installation occurs, and the fixing device for the mine slope supporting net is designed to solve the problems.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide the fixing device for the mine slope support net, which can effectively fix the mine slope support net.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
a fixing device of a mine slope support net comprises a center fixing mechanism and four edge fixing mechanisms uniformly distributed on the periphery of the center fixing mechanism along the circumferential direction;
the center fixing mechanism comprises a center fixing seat and a guide plug-in unit arranged at the bottom of the center fixing seat, an auxiliary limiting mechanism is arranged in the center fixing seat, four reinforcing plug-in units are uniformly distributed on the edge of the top of the center fixing seat along the circumferential direction, a limiting seat is horizontally arranged above the center fixing seat, and the top of each reinforcing plug-in unit penetrates through the corresponding limiting seat and is connected with a fixing nut;
the center fixing seat comprises an internal thread insertion cylinder and a compression ring plate arranged at the top of the internal thread insertion cylinder, and four insertion screw holes are uniformly distributed on the edge of the compression ring plate along the circumferential direction;
the limiting seat comprises a limiting circular plate, a sealing connecting sleeve matched with the internal thread plug tube is vertically arranged in the center of the bottom of the limiting circular plate, four plug-in through holes corresponding to plug-in screw holes are uniformly distributed on the surface of the limiting circular plate, and a sliding plug-in groove is formed between every two adjacent plug-in through holes;
the reinforced plug connector comprises a plug cushion block, a plug screw rod matched with the plug screw hole is arranged at the top of the plug cushion block, the top of the plug screw rod sequentially penetrates through the plug screw hole and the plug through hole to be connected with the fixing nut, and a first conical plug is vertically arranged at the bottom of the plug cushion block;
the guide plug-in comprises a second conical plug, an external thread connecting sleeve matched with the internal thread inserting cylinder is arranged at the top of the second conical plug, an adjusting internal thread is arranged on the inner side surface of the external thread connecting sleeve in a turning mode, and four guide jacks which are obliquely arranged are uniformly distributed in the middle of the second conical plug;
the auxiliary limiting mechanism comprises an adjusting screw rod matched with the adjusting internal thread, four auxiliary plug-ins are uniformly distributed at the bottom of the adjusting screw rod, and a compression spring is arranged in the middle of the auxiliary plug-ins;
the auxiliary plug-in unit comprises a horizontally distributed adjusting press block, a guide plug rod matched with the guide jack is obliquely arranged at the bottom of the adjusting press block, a third conical plug is arranged at the bottom of the guide plug rod, a compression spring is installed at the outer side of the guide plug rod, the top of the compression spring is in contact connection with the adjusting press block, and the bottom of the compression spring is in contact connection with the top surface of the second conical plug;
the edge fixing mechanism comprises an edge connecting rod and an edge fixing seat arranged at the outer end of the edge connecting rod, the edge connecting rod is rotationally connected with the edge fixing seat through a fixed insertion pipe, the edge fixing seat is fixedly connected with the clamping seat through a fixed bolt, and two anti-falling plug-ins are symmetrically arranged at the bottom of the clamping seat;
the edge fixing seat comprises an edge fixing table, one end of the edge fixing table is provided with a rotating clamping groove, the other end of the edge fixing table is provided with a mounting protrusion, the top of the edge fixing table is provided with a fixing jack vertically communicated with the rotating clamping groove, and the mounting protrusion is vertically provided with a fixing screw hole matched with the fixing bolt; the outer end of the edge connecting rod is provided with a rotating round block matched with the rotating clamping groove, and the center of the rotating round block is provided with a fixed perforation corresponding to the fixed jack; the top of the fixed insertion tube is provided with an extrusion top block; the clamping seat comprises a clamping table, a clamping groove is formed in the bottom surface of the clamping table, a connecting cross rod is vertically arranged at the bottom end of the outer side of the clamping table, a fixed pressing column matched with the fixed screw hole is vertically arranged on the surface of the connecting cross rod, and the bottom of the fixed bolt penetrates through the fixed screw hole to be in contact connection with the fixed pressing column;
two clamping screw holes are symmetrically formed in the bottom of the clamping table, the anti-falling plug-in unit comprises a fourth conical plug, and clamping studs matched with the clamping screw holes are arranged at the top of the fourth conical plug.
Further, the included angle between the guide inserted link and the horizontal plane is 30-45 degrees.
Further, the fixed jack is in sliding fit with the fixed insertion tube, and a chamfer is formed at the edge of the bottom of the fixed insertion tube.
Further, the sliding inserting groove is in interference fit with the edge connecting rod.
Further, the sealing connecting sleeve is in sliding fit with the top of the internal thread inserting cylinder.
The beneficial effects of the invention are as follows:
according to the invention, through scientific and reasonable structural design, the supporting net of the mine slope can be effectively fixed, through the mutual matching design of the central fixing mechanism and the edge fixing mechanism, the device center is reinforced, the whole device center is firmly connected with the ground under the action of the auxiliary limiting mechanism, the fixing strength of the whole device is ensured, and meanwhile, through the adjustable structural design of the edge fixing mechanism, the mesh structures with different shapes can be quickly fixed, so that the mine slope fixing device is quick in installation, time-saving and labor-saving, and has good practical and popularization values.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of a partial structure of the present invention;
FIG. 3 is a schematic view of a partial structure of the present invention;
FIG. 4 is a schematic view of a partial structure of the present invention;
FIG. 5 is a schematic view of a partial structure of the present invention;
FIG. 6 is a schematic view of a partial structure of the present invention;
FIG. 7 is a partial cross-sectional view of the structure of the present invention;
FIG. 8 is a schematic view of a partial structure of the present invention;
FIG. 9 is a partial schematic view of the present invention;
FIG. 10 is a schematic view of a partial structure of the present invention;
FIG. 11 is an exploded view of a partial structure of the present invention;
fig. 12 is an exploded view of a partial structure of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "open," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like indicate orientation or positional relationships, merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The fixing device of the mine side slope support net shown in fig. 1 comprises a central fixing mechanism 1 and four edge fixing mechanisms 2 which are uniformly distributed on the periphery side of the central fixing mechanism 1 along the circumferential direction.
As shown in fig. 2, the center fixing mechanism 1 includes a center fixing seat 11 and a guide insert 12 installed at the bottom of the center fixing seat 11, an auxiliary limiting mechanism is installed in the center fixing seat 11, four reinforcing inserting pieces 13 are uniformly distributed on the edge of the top of the center fixing seat 11 along the circumferential direction, a limiting seat 14 is horizontally installed above the center fixing seat 11, and the top of the reinforcing inserting pieces 13 penetrates through the limiting seat 14 to be connected with a fixing nut 15.
As shown in fig. 3, the central fixing seat 11 includes an internal thread insertion cylinder 111 and a compression ring plate 112 disposed at the top of the internal thread insertion cylinder 111, and four insertion screw holes 113 are uniformly distributed along the circumferential direction on the edge of the compression ring plate 112.
As shown in fig. 4, the limiting seat 14 includes a limiting circular plate 141, a sealing connection sleeve 142 matched with the internal thread insertion tube 111 is vertically arranged in the center of the bottom of the limiting circular plate 141, sliding fit is provided between the sealing connection sleeve 142 and the top of the internal thread insertion tube 111, four insertion through holes 143 corresponding to the insertion screw holes 113 are uniformly distributed on the surface of the limiting circular plate 141, and sliding insertion grooves 144 are provided between two adjacent insertion through holes 143.
As shown in fig. 5, the reinforcing plug connector 13 comprises a plug cushion block 131, a plug screw 132 matched with the plug screw hole 113 is arranged at the top of the plug cushion block 131, the top of the plug screw 132 sequentially penetrates through the plug screw hole 113 and the plug through hole 143 to be connected with the fixing nut 15, and a first conical plug 133 is vertically arranged at the bottom of the plug cushion block 131.
As shown in fig. 6 and 7, the guide insert 12 includes a second conical plug 121, an external thread connecting sleeve 122 matched with the internal thread inserting cylinder 111 is arranged at the top of the second conical plug 121, an adjusting internal thread is turned on the inner side surface of the external thread connecting sleeve 122, and four guide insertion holes 123 which are obliquely arranged are uniformly distributed in the middle of the second conical plug 121.
As shown in fig. 8, the auxiliary limiting mechanism comprises an adjusting screw 16 matched with the adjusting internal thread, four auxiliary inserts 17 are uniformly distributed at the bottom of the adjusting screw 16, and a compression spring 18 is arranged in the middle of the auxiliary inserts 17.
As shown in fig. 9, the auxiliary plug 17 includes a horizontally distributed adjusting press block 171, a guiding insert rod 172 matched with the guiding insertion hole 123 is obliquely arranged at the bottom of the adjusting press block 171, a third taper plug 173 is arranged at the bottom of the guiding insert rod 172, a compression spring 18 is installed at the outer side of the guiding insert rod 172, the top of the compression spring 18 is in contact connection with the adjusting press block 171, the bottom of the compression spring 18 is in contact connection with the top surface of the second taper plug 121, and an included angle between the guiding insert rod 172 and the horizontal plane is 30 ° -45 °.
As shown in fig. 10, the edge fixing mechanism 2 includes an edge connecting rod 21 and an edge fixing seat 22 mounted at the outer end of the edge connecting rod 21, the edge connecting rod 21 is rotationally connected with the edge fixing seat 22 through a fixing insertion tube 23, the edge fixing seat 22 is fixedly connected with a clamping seat 24 through a fixing bolt 26, two anti-falling inserts 25 are symmetrically mounted at the bottom of the clamping seat 24, and an interference fit is formed between a sliding insertion groove 144 and the edge connecting rod 21.
As shown in fig. 11, the edge fixing base 22 includes an edge fixing base 221, one end of the edge fixing base 221 is provided with a rotation clamping groove 222, the other end of the edge fixing base 221 is provided with a mounting protrusion 224, the top of the edge fixing base 221 is provided with a fixing insertion hole 223 vertically penetrating the rotation clamping groove 222, and the mounting protrusion 224 is vertically provided with a fixing screw hole 225 matched with the fixing bolt 26; the outer end of the edge connecting rod 21 is provided with a rotary round block 211 matched with the rotary clamping groove 222, and the center of the rotary round block 211 is provided with a fixed through hole 212 corresponding to the fixed jack 223; the top of the fixed cannula 23 is provided with an extrusion top block 231; the clamping seat 24 comprises a clamping table 241, a clamping groove 242 is formed in the bottom surface of the clamping table 241, a connecting cross rod 243 is vertically arranged at the bottom end of the outer side of the clamping table 241, a fixed pressing column 244 matched with the fixed screw hole 225 is vertically arranged on the surface of the connecting cross rod 243, the bottom of the fixed bolt 26 passes through the fixed screw hole 225 to be in contact with the fixed pressing column 244, sliding fit is achieved between the fixed insertion hole 223 and the fixed insertion tube 23, and a chamfer is formed in the edge of the bottom of the fixed insertion tube 23.
As shown in fig. 12, two clamping screw holes 245 are symmetrically arranged at the bottom of the clamping table 241, the anti-drop plug 25 comprises a fourth conical plug 251, and clamping studs 252 matched with the clamping screw holes 245 are arranged at the top of the fourth conical plug 251.
Working principle: when the device is used, firstly, the supporting net is covered on a slope to be protected, then the central fixing mechanism 1 is fixed in the center of the inside of the supporting net mesh, then the matching depth of the edge connecting rod 21 and the sliding inserting groove 144 is adjusted according to the size of the mesh, and the edge fixing mechanism 2 is fixed; after the center fixing mechanism 1 is fixed, the adjusting screw 16 is rotated to press the auxiliary plug-in 17 obliquely downwards, and finally the auxiliary plug-in 17 slides out of the guide insertion hole 123, so that an auxiliary limiting effect is achieved, then the clamping groove 242 and the support net are clamped, limiting is achieved, then the fixing bolt 26 is rotated, the clamping seat 24 is pressed downwards, and fixing of the support net is finally achieved.
According to the invention, through scientific and reasonable structural design, the supporting net of the mine slope can be effectively fixed, through the mutual matching design of the central fixing mechanism and the edge fixing mechanism, the device center is reinforced, the whole device center is firmly connected with the ground under the action of the auxiliary limiting mechanism, the fixing strength of the whole device is ensured, and meanwhile, through the adjustable structural design of the edge fixing mechanism, the mesh structures with different shapes can be quickly fixed, so that the mine slope fixing device is quick in installation, time-saving and labor-saving, and has good practical and popularization values.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (5)
1. The utility model provides a fixing device of mine side slope support net which characterized in that: comprises a center fixing mechanism (1) and four edge fixing mechanisms (2) which are uniformly distributed on the periphery of the center fixing mechanism (1) along the circumferential direction;
the center fixing mechanism (1) comprises a center fixing seat (11) and a guide insert (12) arranged at the bottom of the center fixing seat (11), an auxiliary limiting mechanism is arranged in the center fixing seat (11), four reinforcing inserts (13) are uniformly distributed on the edge of the top of the center fixing seat (11) along the circumferential direction, a limiting seat (14) is horizontally arranged above the center fixing seat (11), and the top of the reinforcing inserts (13) penetrates through the limiting seat (14) to be connected with a fixing nut (15);
the center fixing seat (11) comprises an internal thread insertion cylinder (111) and a compression ring plate (112) arranged at the top of the internal thread insertion cylinder (111), and four insertion screw holes (113) are uniformly distributed on the edge of the compression ring plate (112) along the circumferential direction;
the limiting seat (14) comprises a limiting circular plate (141), a sealing connecting sleeve (142) matched with the internal thread plug tube (111) is vertically arranged in the center of the bottom of the limiting circular plate (141), four plug-in through holes (143) corresponding to the plug-in screw holes (113) are uniformly distributed on the surface of the limiting circular plate (141), and a sliding plug-in groove (144) is formed between every two adjacent plug-in through holes (143);
the reinforced plug connector (13) comprises a plug cushion block (131), a plug screw (132) matched with the plug screw hole (113) is arranged at the top of the plug cushion block (131), the top of the plug screw (132) sequentially penetrates through the plug screw hole (113) and the plug through hole (143) to be connected with the fixing nut (15), and a first conical plug (133) is vertically arranged at the bottom of the plug cushion block (131);
the guide plug-in unit (12) comprises a second conical plug (121), an external thread connecting sleeve (122) matched with the internal thread inserting cylinder (111) is arranged at the top of the second conical plug (121), an adjusting internal thread is turned on the inner side surface of the external thread connecting sleeve (122), and four guide jacks (123) which are obliquely arranged are uniformly distributed in the middle of the second conical plug (121);
the auxiliary limiting mechanism comprises an adjusting screw (16) matched with the adjusting internal thread, four auxiliary inserts (17) are uniformly distributed at the bottom of the adjusting screw (16), and a compression spring (18) is arranged in the middle of the auxiliary inserts (17);
the auxiliary plug-in components (17) include the regulation briquetting (171) of horizontal distribution, regulation briquetting (171) bottom slope be provided with direction jack (123) matched with direction inserted bar (172), direction inserted bar (172) bottom is equipped with third taper plug (173), compression spring (18) are installed in direction inserted bar (172) outside, compression spring (18) top links to each other with regulation briquetting (171) contact, compression spring (18) bottom links to each other with second taper plug (121) top surface contact;
the edge fixing mechanism (2) comprises an edge connecting rod (21) and an edge fixing seat (22) arranged at the outer end of the edge connecting rod (21), the edge connecting rod (21) is rotationally connected with the edge fixing seat (22) through a fixing insertion pipe (23), the edge fixing seat (22) is fixedly connected with a clamping seat (24) through a fixing bolt (26), and two anti-falling plug-ins (25) are symmetrically arranged at the bottom of the clamping seat (24);
the edge fixing seat (22) comprises an edge fixing table (221), one end of the edge fixing table (221) is provided with a rotary clamping groove (222), the other end of the edge fixing table (221) is provided with a mounting protrusion (224), the top of the edge fixing table (221) is provided with a fixing jack (223) vertically communicated with the rotary clamping groove (222), and the mounting protrusion (224) is vertically provided with a fixing screw hole (225) matched with the fixing bolt (26); the outer end of the edge connecting rod (21) is provided with a rotary round block (211) matched with the rotary clamping groove (222), and the center of the rotary round block (211) is provided with a fixed through hole (212) corresponding to the fixed jack (223); the top of the fixed insertion tube (23) is provided with an extrusion top block (231); the clamping seat (24) comprises a clamping table (241), a clamping groove (242) is formed in the bottom surface of the clamping table (241), a connecting cross rod (243) is vertically arranged at the bottom end of the outer side of the clamping table (241), a fixed pressing column (244) matched with the fixed screw hole (225) is vertically arranged on the surface of the connecting cross rod (243), and the bottom of the fixed bolt (26) passes through the fixed screw hole (225) to be in contact connection with the fixed pressing column (244);
two clamping screw holes (245) are symmetrically formed in the bottom of the clamping table (241), the anti-falling plug-in assembly (25) comprises a fourth conical plug (251), and clamping studs (252) matched with the clamping screw holes (245) are arranged at the top of the fourth conical plug (251).
2. A mine slope support net fixing device as in claim 1, wherein: the included angle between the guide inserted rod (172) and the horizontal plane is 30-45 degrees.
3. A mine slope support net fixing device as in claim 1, wherein: the fixed insertion hole (223) is in sliding fit with the fixed insertion tube (23), and a chamfer is formed at the bottom edge of the fixed insertion tube (23).
4. A mine slope support net fixing device as in claim 1, wherein: the sliding inserting groove (144) is in interference fit with the edge connecting rod (21).
5. A mine slope support net fixing device as in claim 1, wherein: the sealing connecting sleeve (142) is in sliding fit with the top of the internal thread plug tube (111).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811092003.7A CN108894237B (en) | 2018-09-19 | 2018-09-19 | Fixing device of mine side slope support net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811092003.7A CN108894237B (en) | 2018-09-19 | 2018-09-19 | Fixing device of mine side slope support net |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108894237A CN108894237A (en) | 2018-11-27 |
| CN108894237B true CN108894237B (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811092003.7A Active CN108894237B (en) | 2018-09-19 | 2018-09-19 | Fixing device of mine side slope support net |
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| Country | Link |
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| CN (1) | CN108894237B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109785751B (en) * | 2019-04-04 | 2021-05-07 | 哈尔滨学院 | Intelligent route planning device for tourist attraction |
| CN111058870B (en) * | 2020-01-07 | 2024-05-24 | 安徽建筑大学 | Indirect continuous grouting device for active disaster control |
| CN111501592B (en) * | 2020-04-01 | 2021-11-09 | 安徽金联地矿科技有限公司 | Ore side slope prevention device based on environment is administered |
| CN111456038B (en) * | 2020-04-01 | 2021-08-24 | 安徽金联地矿科技有限公司 | Anchoring device for mine side slope |
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