CN111501592B - Ore side slope prevention device based on environment is administered - Google Patents

Ore side slope prevention device based on environment is administered Download PDF

Info

Publication number
CN111501592B
CN111501592B CN202010251026.9A CN202010251026A CN111501592B CN 111501592 B CN111501592 B CN 111501592B CN 202010251026 A CN202010251026 A CN 202010251026A CN 111501592 B CN111501592 B CN 111501592B
Authority
CN
China
Prior art keywords
rod
positioning
supporting
hole
rods
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010251026.9A
Other languages
Chinese (zh)
Other versions
CN111501592A (en
Inventor
任飞
廖海萍
孙协龙
明桂林
盛华圣
柳海军
周娟
牛杏杏
李学锋
姜明亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Jinlian Geology And Mineral Resources Technology Co ltd
Original Assignee
Anhui Jinlian Geology And Mineral Resources Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Anhui Jinlian Geology And Mineral Resources Technology Co ltd filed Critical Anhui Jinlian Geology And Mineral Resources Technology Co ltd
Priority to CN202010251026.9A priority Critical patent/CN111501592B/en
Publication of CN111501592A publication Critical patent/CN111501592A/en
Application granted granted Critical
Publication of CN111501592B publication Critical patent/CN111501592B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F7/00Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/04Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F7/00Devices affording protection against snow, sand drifts, side-wind effects, snowslides, avalanches or falling rocks; Anti-dazzle arrangements ; Sight-screens for roads, e.g. to mask accident site
    • E01F7/04Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries
    • E01F7/045Devices specially adapted for protecting against falling rocks, e.g. galleries, nets, rock traps

Abstract

The invention discloses an ore slope prevention device based on environmental management, and relates to the technical field of ecological restoration. The invention comprises a support rod; a first protective net is arranged between the two supporting rods; one end of the supporting rod is fixed with a mounting rod; the mounting rod is provided with a support frame; a first connecting rod is arranged between the two pairs of supporting frames which are corresponding in position; a second connecting rod is arranged on the first connecting rod; a third connecting rod is arranged on the second connecting rod; one end of the supporting rod is fixed with a guide post; the upper end part of the guide post and the lower end part of the mounting rod are both provided with a positioning assembly; an adjusting sleeve is slidably sleeved on the guide post; the opposite outer side surfaces of the two adjusting sleeves are rotatably connected with buffer rods; a second protective net is arranged between the two buffer rods. According to the invention, through the combined design of the first protective net and the second protective net, stones which may fall over the operation area can be effectively blocked, the life health of treatment personnel is protected, and the combined protective net has higher market application value.

Description

Ore side slope prevention device based on environment is administered
Technical Field
The invention belongs to the technical field of ecological restoration, and particularly relates to an ore slope prevention device based on environmental management.
Background
The ore slope engineering is an important link in mine work, mining itself is a damage to the original rock, mining and stripping operation breaks the balance state of original stress in the slope rock, a secondary stress field appears, and under the influence of the secondary stress field and other factors, the slope rock is often broken and deformed, so that the rock is unstable, and collapse, scattering, sitting, dumping, collapse, sliding and the like are caused. The side slope is unstable, so that geological disasters such as landslide collapse, debris flow and the like are induced, and the improvement of the environmental quality of residents in a mining area and surrounding areas are influenced. Therefore, the stability of the ore side slope is directly related to the safety of human bodies and property, the reinforcement of the ore side slope is the basic work of're-greening', and the treatment of the ore side slope is the premise of ecological treatment. In the process of reinforcing the ore side slope, the problem of rock mass sliding or rolling can occur, and the life health of governing personnel is threatened. Therefore, there is a need to develop an ore slope prevention apparatus based on environmental improvement so as to solve the above problems.
Disclosure of Invention
The invention aims to provide an ore slope prevention device based on environmental management, and the purpose of the device is only to solve the problems in the background technology.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an ore slope prevention device based on environmental management, which comprises a pair of symmetrically arranged support rods; a first protective net is arranged between the two supporting rods; one ends of the two support rods facing the same direction are both vertically fixed with a mounting rod; the mounting rod is arranged on the lower surface of the supporting rod; the mounting rod is provided with at least one pair of supporting frames; a first connecting rod is arranged between the two pairs of the supporting frames which are corresponding in position; a pair of second connecting rods is radially arranged on the first connecting rod; a third connecting rod is arranged between the end parts of the two second connecting rods facing to the same direction; the third connecting rod is arranged in parallel with the first connecting rod; one ends of the two support rods facing the same direction are both vertically fixed with a guide column; the guide post is arranged on the upper surface of the support rod; the upper end part of the guide column and the lower end part of the mounting rod are respectively provided with a positioning component for fixing the support rod on the ore side slope; an adjusting sleeve is slidably sleeved on the guide post; the opposite outer side surfaces of the two adjusting sleeves are rotatably connected with a buffer rod; a second protective net is arranged between the two buffer rods; the second protective net and the first protective net are connected to the third connecting rod through a plurality of connecting strips; one ends of the two buffer rods facing the same direction are rotatably connected with an elastic rod; the two elastic rods are respectively and correspondingly connected to the other end parts of the two side support rods facing the same direction in a rotating way.
Further, a support rod is arranged below the side support rod; one end of the supporting rod is fixed on the lower surface of the side supporting rod, and the other end of the supporting rod is fixed on one surface of the mounting rod.
Furthermore, a tensioning spring is sleeved on the guide post; the tensioning spring is arranged between the side stay bar and the adjusting sleeve.
Further, the positioning assembly comprises a supporting block and an inserting rod; a supporting hole is formed in the supporting block in a penetrating manner; a plurality of limiting pieces are circumferentially arranged on the inner wall of the supporting hole; the limiting piece comprises a plurality of limiting spacers; the plurality of limiting spacers are arranged along the axial direction of the support hole; one end of the inserted link is fixed with an expansion head; a plurality of positioning sheets corresponding to the support holes are axially arranged on the other end of the inserted rod side by side; the distance between two adjacent positioning pieces is consistent with the distance between two adjacent limiting spacing pieces; a plurality of guide notches corresponding to the limiting pieces are formed in the circumferential direction of the edge of the positioning piece; when the insertion rod is inserted into the supporting hole, the positioning piece is arranged in the supporting hole through the matching of the guide notch and the limiting piece; after the inserted link is rotated by 90 degrees, the positioning sheet is arranged between two adjacent limiting spacers; the locating plate is in interference fit with the limiting spacer.
Furthermore, a positioning hole is formed in one surface of the limiting spacer along the axial direction of the supporting hole; a plurality of through holes corresponding to the positioning holes are formed in the circumferential direction on one surface of the positioning sheet; a positioning rod is inserted among the through holes with the shaft axes coincident with each other; after the locating piece is arranged between two adjacent spacing spacers, the locating rod is inserted into the through hole and matched with the locating hole.
Furthermore, one ends of the positioning rods facing the same direction are connected through a pressing sheet.
Furthermore, when the positioning rod is in interference fit with the positioning hole and the through hole, the positioning rod is fixedly connected with the pressing sheet; or the positioning rod, the positioning hole and the through hole are designed to be in threaded fit, and the positioning rod is rotatably connected with the pressing sheet at the moment.
The invention has the following beneficial effects:
according to the ore slope prevention device based on environmental improvement, the prevention device is arranged above the operation area of an operator before the ore slope is improved, and the stone which is possibly rolled over the operation area can be effectively blocked by utilizing the combined design of the first protective net and the second protective net, so that the life health of the operator is protected, and the ore slope prevention device has high market application value.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an ore slope prevention device based on environmental management according to the present invention;
fig. 2 is a schematic structural view illustrating that a first protection net and a second protection net according to the present invention are installed on a side stay;
FIG. 3 is a schematic view of the support block of the present invention;
FIG. 4 is a schematic view of the positioning plate of the present invention mounted on the insertion rod;
fig. 5 is an installation diagram of an ore slope prevention device installed on an ore slope according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-side supporting rod, 2-first protective net, 3-mounting rod, 4-first connecting rod, 5-second connecting rod, 6-third connecting rod, 7-guide column, 8-positioning component, 9-second protective net, 10-connecting strip, 101-supporting rod, 301-supporting frame, 701-adjusting sleeve, 702-buffer rod, 703-elastic rod, 704-tensioning spring, 801-supporting block, 802-inserted rod, 803-expanding head, 804-positioning piece, 805-positioning rod, 806-pressing piece, 8011-limiting spacer, 8012-positioning hole, 8041-guide notch and 8042-through hole.
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. 1-4, the present invention relates to an ore slope prevention device based on environmental management, which comprises a pair of symmetrically disposed support rods 101; a first protective net 2 is arranged between the two supporting rods 101; one ends of the two support rods 101 facing the same direction are vertically fixed with a mounting rod 3; a supporting rod 101 is arranged below the side supporting rod 1; one end of the supporting rod 101 is fixed on the lower surface of the side supporting rod 1, and the other end is fixed on one surface of the mounting rod 3; the mounting rod 3 is arranged on the lower surface of the support rod 101; two pairs of support frames 301 in a V-shaped structure are arranged on the mounting rod 3 side by side; a first connecting rod 4 is arranged between two pairs of supporting frames 301 corresponding to the positions of the two mounting rods 3; a pair of second connecting rods 5 is radially arranged between the two first connecting rods 4; the second connecting rod 5 is arranged in parallel with the mounting rod 3; a third connecting rod 6 is arranged between the end parts of the two second connecting rods 5 facing the same direction; the third connecting rod 6 is arranged in parallel with the first connecting rod 4;
one ends of the two support rods 101 facing the same direction are vertically fixed with a guide post 7; the guide post 7 is arranged on the upper surface of the support rod 101; the upper end part of the guide post 7 and the lower end part of the mounting rod 3 are both provided with a positioning assembly 8; an adjusting sleeve 701 is slidably sleeved on the guide post 7; a tension spring 704 is sleeved on the guide post 7; the tension spring 704 is arranged between the side stay bar 1 and the adjusting sleeve 701; the opposite outer side surfaces of the two adjusting sleeves 701 are rotatably connected with a buffer rod 702; a second protective net 9 is arranged between the two buffer rods 702; the second protective net 9 and the first protective net 2 are connected to the third connecting rod 6 through a plurality of connecting strips 10; one end of each buffer rod 702 facing the same direction is rotatably connected with an elastic rod 703; the two elastic rods 703 are respectively and correspondingly connected to the other end parts of the two side stay bars 1 facing the same direction in a rotating way; the elastic rod 703 comprises a first strut and a second strut; the first supporting rod is made of a material with good elastic potential energy and only stretches along the axial direction of the second supporting rod; the first supporting rod is fixedly connected with the second supporting rod.
Wherein, the positioning component 8 comprises a supporting block 801 and an inserting rod 802; a supporting hole with a circular cross section is formed in the supporting block 801 in a penetrating manner; a plurality of limiting pieces are circumferentially arranged on the inner wall of the supporting hole; the limiting member comprises a plurality of limiting spacers 8011 in a flat square structure; a plurality of limiting spacers 8011 are arranged along the axial direction of the support hole; an expansion head 803 is fixed at one end of the insert rod 802; the expansion head 803 is in a conical structure, and a plurality of through notches are formed in the circumferential direction of the outer wall of the expansion head 803; a plurality of positioning sheets 804 corresponding to the support holes are axially fixed on the other end of the inserted rod 802 in parallel; the distance between two adjacent positioning pieces 804 is the same as the distance between two adjacent limiting spacers 8011; a plurality of guide slots 8041 corresponding to the limiting pieces are circumferentially arranged on the edge of the positioning piece 804; when the insertion rod 802 is inserted into the supporting hole, the positioning piece 804 is placed in the supporting hole by the matching of the guide slot 8041 and the limiting piece; after the inserted link 802 is rotated by 90 degrees, the positioning piece 804 is arranged between two adjacent limiting spacers 8011; the locating tab 804 is in interference fit with the spacing spacer 8011.
A positioning hole 8012 is formed in one surface of the limiting spacer 8011 along the axial direction of the supporting hole; a plurality of through holes 8042 corresponding to the positioning holes 8012 are formed in the circumferential direction on one surface of the positioning sheet 804; a positioning rod 805 is inserted between the through holes 8042 with the overlapped shaft axes; after the positioning piece 804 is arranged between two adjacent limiting spacers 8011, the positioning rod 805 is inserted into the through hole 8042, and the positioning rod 805 is matched with the positioning hole 8012; a plurality of alignment rods 805 are connected to each other at the same end by a pressing piece 806.
The positioning rod 805 is in interference fit with the positioning hole 8012 and the through hole 8042, and the positioning rod 805 is fixedly connected with the pressing piece 806; or the positioning rod 805, the positioning hole 8012 and the through hole 8042 are both designed to be in threaded fit, and at this time, the positioning rod 805 is rotatably connected to the pressing piece 806.
As shown in fig. 5, the positioning assembly 8 is inserted into the surface of the ore side slope, at this time, the first protective net 2 is perpendicular to the surface of the ore side slope, and the installation rod 3 is parallel to the surface of the ore side slope; meanwhile, the closed end of the support frame 301 is abutted against the surface of the ore slope, so that the positions of the first connecting rod 4, the second connecting rod 5 and the third connecting rod 6 can be fixed; through setting up two-layer protection network structure, can effectively block the stone that rolls on the ore side slope, realize the prevention effect.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims (8)

1. An ore slope prevention device based on environmental management comprises a pair of symmetrically arranged support rods (101); a first protective net (2) is arranged between the two supporting rods (101); the method is characterized in that:
one end of each support rod (101) facing the same direction is vertically fixed with a mounting rod (3); the mounting rod (3) is arranged on the lower surface of the supporting rod (101); the mounting rod (3) is provided with at least one pair of supporting frames (301); a first connecting rod (4) is arranged between two pairs of the supporting frames (301) corresponding to the positions; a pair of second connecting rods (5) is radially arranged on the first connecting rod (4); a third connecting rod (6) is arranged between the end parts of the two second connecting rods (5) facing to the same direction; the third connecting rod (6) and the first connecting rod (4) are arranged in parallel;
one ends of the two support rods (101) facing the same direction are both vertically fixed with a guide column (7); the guide post (7) is arranged on the upper surface of the support rod (101); the upper end part of the guide column (7) and the lower end part of the mounting rod (3) are respectively provided with a positioning component (8) for fixing the support rod (101) on the ore slope;
an adjusting sleeve (701) is slidably sleeved on the guide post (7); the opposite outer side surfaces of the two adjusting sleeves (701) are rotatably connected with a buffer rod (702); a second protective net (9) is arranged between the two buffer rods (702); the second protective net (9) and the first protective net (2) are connected to the third connecting rod (6) through a plurality of connecting strips (10); one end of each of the two buffer rods (702) facing the same direction is rotatably connected with an elastic rod (703); the two elastic rods (703) are respectively and correspondingly connected to the other end parts of the two side support rods (1) facing the same direction in a rotating way.
2. An ore slope prevention device based on environmental remediation according to claim 1, characterized in that a support rod (101) is arranged below the side support rod (1); one end of the supporting rod (101) is fixed on the lower surface of the side supporting rod (1), and the other end of the supporting rod is fixed on one surface of the mounting rod (3).
3. An ore slope prevention device based on environmental remediation according to claim 2, characterized in that the guide post (7) is sleeved with a tension spring (704); the tensioning spring (704) is arranged between the side stay bar (1) and the adjusting sleeve (701).
4. An environmental governance-based ore slope prevention apparatus according to any one of claims 1-3, wherein said positioning assembly (8) comprises a support block (801) and a spigot (802); a supporting hole is formed in the supporting block (801) in a penetrating manner; a plurality of limiting pieces are circumferentially arranged on the inner wall of the supporting hole; the limiting piece comprises a plurality of limiting spacers (8011); the limiting spacers (8011) are arranged along the axial direction of the supporting hole;
an expansion head (803) is fixed at one end of the inserted link (802); a plurality of positioning sheets (804) corresponding to the support holes are axially arranged side by side on the other end of the inserted rod (802); the distance between two adjacent positioning pieces (804) is consistent with the distance between two adjacent limiting spacers (8011); a plurality of guide notches (8041) corresponding to the limiting pieces are formed in the circumferential direction of the edge of the positioning piece (804);
when the inserting rod (802) is inserted into the supporting hole in a penetrating way, the positioning sheet (804) is arranged in the supporting hole through the matching of the guide notch (8041) and the limiting piece; after the inserted rod (802) is rotated by 90 degrees, the positioning piece (804) is arranged between two adjacent limiting spacers (8011); the locating piece (804) is in interference fit with the limiting spacer (8011).
5. The ore slope prevention device based on environmental improvement according to claim 4, wherein a positioning hole (8012) is formed in one surface of the limiting spacer (8011) along an axial direction of the supporting hole; a plurality of through holes (8042) corresponding to the positioning holes (8012) are formed in the circumferential direction of one surface of the positioning sheet (804); a positioning rod (805) is inserted among the through holes (8042) with the shaft axes coincident; after the positioning piece (804) is arranged between the two adjacent limiting spacers (8011), the positioning rod (805) is inserted into the through hole (8042), and the positioning rod (805) is matched with the positioning hole (8012).
6. An environmental governance-based ore slope prevention apparatus according to claim 5, wherein a plurality of said positioning rods (805) are connected towards the same end by a pressing piece (806).
7. An environmental remediation based ore slope prevention apparatus as claimed in claim 5 or 6, wherein the locating bar (805) is in interference fit with both the locating hole (8012) and the through hole (8042); the positioning rod (805) is fixedly connected with the pressing sheet (806).
8. An environmental remediation based ore slope prevention apparatus as claimed in claim 5 or 6, wherein the locator bar (805) is in threaded engagement with both the locator aperture (8012) and the through hole (8042); the positioning rod (805) is rotatably connected with the pressing piece (806).
CN202010251026.9A 2020-04-01 2020-04-01 Ore side slope prevention device based on environment is administered Active CN111501592B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010251026.9A CN111501592B (en) 2020-04-01 2020-04-01 Ore side slope prevention device based on environment is administered

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010251026.9A CN111501592B (en) 2020-04-01 2020-04-01 Ore side slope prevention device based on environment is administered

Publications (2)

Publication Number Publication Date
CN111501592A CN111501592A (en) 2020-08-07
CN111501592B true CN111501592B (en) 2021-11-09

Family

ID=71869040

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010251026.9A Active CN111501592B (en) 2020-04-01 2020-04-01 Ore side slope prevention device based on environment is administered

Country Status (1)

Country Link
CN (1) CN111501592B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114045760B (en) * 2021-11-09 2023-06-13 中铁十九局集团第三工程有限公司 Roadbed retaining structure

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1341198A (en) * 1999-01-23 2002-03-20 特纳知识产权有限公司 Wall plug having alignment sleeve
CN203283144U (en) * 2013-06-14 2013-11-13 东风汽车公司 Installing and fixing device of automotive trim board
CN207525762U (en) * 2017-10-29 2018-06-22 张冠生 A kind of side slope protection reinforcement structure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4808226B2 (en) * 2008-02-06 2011-11-02 株式会社プロテックエンジニアリング Shock absorbing fence
CN108894237B (en) * 2018-09-19 2023-08-01 安徽建筑大学 Fixing device of mine side slope support net
CN209854744U (en) * 2019-03-04 2019-12-27 薛松 Protection net for slope protection and greening in building construction

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1341198A (en) * 1999-01-23 2002-03-20 特纳知识产权有限公司 Wall plug having alignment sleeve
CN203283144U (en) * 2013-06-14 2013-11-13 东风汽车公司 Installing and fixing device of automotive trim board
CN207525762U (en) * 2017-10-29 2018-06-22 张冠生 A kind of side slope protection reinforcement structure

Also Published As

Publication number Publication date
CN111501592A (en) 2020-08-07

Similar Documents

Publication Publication Date Title
CN111501592B (en) Ore side slope prevention device based on environment is administered
Indirli et al. Shape memory alloy devices for the structural improvement of masonry heritage structures
DK1115976T3 (en) Floating device and method for utilizing energy from ocean waves
CN210529715U (en) Detachable deep foundation pit excavation braced system
JP2002294627A (en) Prevention device for falling bridge girder
CN211480837U (en) Novel pipeline joint protector
CN105064246B (en) Landscape protection fence component for greenbelt
DE1784644A1 (en) Protective grille
Haoda Review of research progress on buckling restrained braces
CN212130142U (en) Building construction foundation ditch guardrail
CN211924161U (en) Shaft tunnel blasting construction protector
CN220225372U (en) Prevent collapsible excavation supporting construction
CN218969883U (en) Prevent collapsing protection network of stone
CN111413224A (en) Explosion test reaction frame device capable of applying axial pressure to bridge pier stud
CN217000276U (en) Civil engineering antidetonation structure
Chen et al. Study on effect of segments erection tolerance and wedge-shaped segment on segment ring in shield tunnel
CN220522625U (en) Anti-blocking device for retired uranium ore filling
CN216446430U (en) Convenient installation and disassembly structure for civil air defense door
DE916704C (en) Tuebbingsaeule
CN214723642U (en) Fixed bearing structure is used in pipeline processing
KR101978479B1 (en) Rotatable Connection Jack of Steel Pipe Strut Using Friction Contact
CN211598704U (en) Arch-shaped support for coal mine
CN214091301U (en) Protector for civil engineering
CN216986097U (en) Portable laser forcible entry mechanism for fire rescue
CN220451903U (en) Temporary support reinforcing device for shield construction of overlapping tunnel

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