CN115030758A - Liftable broken stone protection mechanism for tunnel blasting construction who adjusts - Google Patents
Liftable broken stone protection mechanism for tunnel blasting construction who adjusts Download PDFInfo
- Publication number
- CN115030758A CN115030758A CN202210297645.0A CN202210297645A CN115030758A CN 115030758 A CN115030758 A CN 115030758A CN 202210297645 A CN202210297645 A CN 202210297645A CN 115030758 A CN115030758 A CN 115030758A
- Authority
- CN
- China
- Prior art keywords
- protection
- tunnel blasting
- blasting construction
- liftable
- top plate
- 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.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F11/00—Rescue devices or other safety devices, e.g. safety chambers or escape ways
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
- E21F5/04—Spraying barriers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/20—Drawing-off or depositing dust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/06—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs
- F16F15/067—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with metal springs using only wound springs
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Engineering & Computer Science (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Business, Economics & Management (AREA)
- Mechanical Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
本发明公开了一种可升降调节的隧道爆破施工用碎石防护机构，包括由金属板制成的防护顶板，所述防护顶板下方左右两侧设置有相互对称的防护侧板，且左右两侧所述防护侧板之间下端设置有移动平台，并且所述移动平台下表面转动安装有移动滚轮，工作平台，固定安装在所述移动平台上表面中间位置，所述工作平台用于工作人员站立，收集槽，设置在所述防护顶板左右两侧外部。该可升降调节的隧道爆破施工用碎石防护机构，采用新型的结构设计，使得装置在面对不同的隧道时可以利用调节丝杆调整装置整体高度，并且爆破后利用负压风扇对粉尘进行吸附，之后利用雾化喷头喷出水雾达到降尘的目的，避免大量粉尘影响后续的正常工作。
The invention discloses a lifting-adjustable crushed stone protection mechanism for tunnel blasting construction, comprising a protective top plate made of metal plates, and symmetrical protective side plates are arranged on the left and right sides below the protective top plate, and the left and right sides are provided with mutually symmetrical protective side plates. A mobile platform is arranged at the lower end between the protective side plates, and a mobile roller is rotatably installed on the lower surface of the mobile platform. The working platform is fixedly installed in the middle position of the upper surface of the mobile platform, and the working platform is used for the staff to stand. , the collection tank is arranged on the outside of the left and right sides of the protective top plate. The lifting and adjusting gravel protection mechanism for tunnel blasting construction adopts a new structural design, so that the device can adjust the overall height of the device by adjusting the screw rod when facing different tunnels, and use a negative pressure fan to absorb dust after blasting , and then use the atomizing nozzle to spray water mist to achieve the purpose of dust reduction, so as to avoid a large amount of dust affecting the subsequent normal work.
Description
Technical Field
The invention relates to the technical field of tunnel blasting construction, in particular to a liftable and adjustable broken stone protection mechanism for tunnel blasting construction.
Background
Tunnel blasting is a common mode in tunnel construction, at first designs the blasting point through professional, and the back is according to the design back blasting of laying wire, can produce the rubble because of vibrations in the in-process tunnel of blasting, and the safety of staff can be threatened in dropping of rubble, so need use protection machanism.
In the prior art, chinese patent with publication number CN213928391U discloses a gravel protector for tunnel engineering construction, which comprises a protection plate, a support frame and a movable base, wherein the protection plate comprises a mounting plate, a triangular block is integrally formed at the top end of the mounting plate, mounting holes are formed at two ends of the triangular block, the support frame comprises a mounting shaft, the mounting shaft is mounted in the mounting holes, the mounting shaft is rotatably connected with the triangular block, a support pillar is integrally formed at one end of the mounting shaft, a cross beam is integrally formed on the outer wall of the support pillar, a connecting block is integrally formed at the bottom end of the support pillar, through the arrangement of the protection plate and the support framework, when gravels with larger weight fall on the mounting plate, because the mounting plate is unevenly stressed and rotates by taking the mounting shaft as the center, the mounting plate is inclined to one side, thereby make great rubble along mounting panel inclination to one side landing, the reduction device receives the condition that the rubble oppressed production deformation to appear.
However, in the actual use process, the height of the device cannot be adjusted, so that the device cannot adapt to the protection work of different tunnels, the overall applicability of the device is limited, and a large amount of dust is generated in the tunnels in the blasting process, so that the normal work of subsequent workers is influenced.
Disclosure of Invention
The invention aims to provide a liftable and adjustable broken stone protection mechanism for tunnel blasting construction, and aims to solve the problems that the overall applicability of the device is poor and the follow-up normal work is influenced by dust in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a but broken stone protection machanism for tunnel blasting construction of lifting adjustment, includes the protection roof of being made by the metal sheet, protection roof below left and right sides is provided with the protection curb plate of mutual symmetry, and the left and right sides the lower extreme is provided with moving platform between the protection curb plate, and moving platform lower surface rotates installs the removal gyro wheel, still includes:
the working platform is fixedly arranged in the middle of the upper surface of the moving platform and used for workers to stand, and rubber anti-skidding materials are arranged outside the upper surface of the working platform;
the damping springs are used for connecting the protective top plate and the protective side plates and are uniformly arranged from front to back at equal intervals;
the collecting tank is arranged outside the left side and the right side of the protective top plate, the collecting tank is in a front-back through concave structure in a front-back view, a conveying belt rotatably mounted with the collecting tank is arranged on the lower surface inside the collecting tank, and the conveying belt is supported by rotating rollers at the front end and the rear end inside the collecting tank;
the middle partition plate is fixedly installed at the bottom end of the inner side of the protective top plate, a dust suction pipe penetrates through the middle position inside the middle partition plate, and the upper end of the dust suction pipe is higher than the upper surface of the middle partition plate;
and the negative pressure fan is rotatably arranged at the top end of the inner side of the protective top plate, and the wind direction of the negative pressure fan is right downward and upward.
Preferably, the protection roof passes through damping spring with constitute elastic construction between the protection curb plate, just the whole circular-arc structure that is with the tunnel inner wall laminating that is of protection roof utilizes the damping spring at middle part to make and provides certain cushion effect when the rubble drops, reduces the impact force that the protection roof received.
Preferably, the lower end of the inner side of the protection side plate is fixedly provided with a linear sliding block, the linear sliding block and the moving platform form a lifting structure through an adjusting screw rod, and the linear sliding block outside the lifting structure drives the protection side plate to move up and down through the rotation of the adjusting screw rod, so that the overall height of the device is changed.
Preferably, atomizer is installed to negative pressure fan left and right sides symmetry, just atomizer passes through coupling hose and constitutes the connectivity with storage gasbag, utilizes atomizer to store gasbag normal water atomizing blowout to reach the purpose of dust fall.
Preferably, the outside of the side surface of the storage air bag is provided with an extrusion cam which is rotatably installed with the middle partition plate, the lower end of the extrusion cam is coaxially and fixedly provided with a driven bevel gear, and the extrusion cam is driven to rotate by the driven bevel gear, so that the storage air bag is extruded.
Preferably, the driven bevel gear is in meshed connection with the side face driving bevel gear, the driving bevel gear and the rotating roller are coaxially and fixedly installed, and the conveying belt drives the driving bevel gear to rotate by the rotating roller in the rotating process, so that the driving bevel gear is in meshed connection with the conveying belt to rotate.
Compared with the prior art, the invention has the beneficial effects that: this but rubble protection machanism is used in tunnel blasting construction of lifting adjustment adopts neotype structural design for the device can utilize accommodate the lead screw adjusting device overall height when facing different tunnels, and utilize negative pressure fan to adsorb the dust after the blasting, later utilize atomizer blowout water smoke to reach the purpose of dust fall, avoid a large amount of dust to influence subsequent normal work.
1. Damping spring, sharp slider, accommodate the lead screw and the collecting vat between the cooperation use, when utilizing the protection roof to protect the rubble, utilize damping spring can provide the cushion effect to make sharp slider drive the protection roof and change the height through accommodate the lead screw's rotation when the tunnel in the face of difference, the inside conveyer belt of collecting vat rotates and can handles the rubble that drops simultaneously.
2. Negative pressure fan, atomizer, the cooperation of storing between gasbag and the extrusion cam is used, and the rotation through negative pressure fan will be around the dust to inside attraction, utilizes the rotation of extrusion cam to extrude storing the gasbag simultaneously to spout from the atomizer through the water that coupling hose will store wherein, reach the purpose of dust fall, avoid the dust to influence staff's follow-up work.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic top view of a mobile platform according to the present invention;
FIG. 3 is a schematic perspective view of the protective roof according to the present invention;
FIG. 4 is an enlarged schematic view of the structure at A in FIG. 1 according to the present invention;
FIG. 5 is a schematic top view of a portion of the conveyor belt of the present invention.
In the figure: 1. a protective roof; 2. a protective side plate; 3. a mobile platform; 301. moving the roller; 4. a working platform; 5. a damping spring; 6. collecting tank; 7. a conveyor belt; 701. a rotating roller; 8. a middle partition plate; 9. a dust collection pipe; 10. a negative pressure fan; 11. a linear slider; 12. adjusting the screw rod; 13. storing the air bag; 14. an atomizing spray head; 15. a connecting hose; 16. an extrusion cam; 17. a driven bevel gear; 18. a drive bevel gear.
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. 1-5, the present invention provides a technical solution: the utility model provides a but rubble protection machanism for tunnel blasting construction of lifting adjustment, includes the protection roof 1 of being made by the metal sheet, and the protection roof 1 below left and right sides is provided with the protection curb plate 2 of mutual symmetry, and the lower extreme is provided with moving platform 3 between the left and right sides protection curb plate 2 to 3 lower surface rotation of moving platform installs removal gyro wheel 301, still includes:
the working platform 4 is fixedly arranged in the middle of the upper surface of the moving platform 3, the working platform 4 is used for workers to stand, and the outer part of the upper surface of the working platform 4 is made of rubber antiskid materials;
the damping springs 5 are used for connecting the protective top plate 1 and the protective side plates 2, and the damping springs 5 are uniformly arranged from front to back at equal intervals;
the collecting groove 6 is arranged outside the left side and the right side of the protective top plate 1, the collecting groove 6 is in a front-back through concave structure in a front-back view, the lower surface in the collecting groove 6 is provided with a conveyor belt 7 rotatably mounted with the collecting groove, and the conveyor belt 7 is supported by rotating rollers 701 at the front end and the rear end in the collecting groove;
elastic structure is formed between protection roof 1 and protection curb plate 2 through damping spring 5, and protection roof 1 wholly is the circular-arc structure with the tunnel inner wall laminating, and 2 inboard lower extremes of protection curb plate fixed mounting have sharp slider 11, and sharp slider 11 passes through accommodate the lead screw 12 and constitutes elevation structure with moving platform 3.
When the device is used, firstly, the mobile platform 3 and the mobile roller 301 below the mobile platform are utilized to move the device to the use position in the tunnel, then a worker stands above the working platform 4 to perform a series of operations, broken stones generated due to vibration in the tunnel during blasting fall into the collecting tanks 6 on the left side and the right side under the action of the protective top plate 1, at the moment, the damping springs 5 play a role in providing buffer force, when the device is used in the face of tunnels with different heights, the adjusting screw rods 12 are controlled to rotate according to the actual height of the tunnel, so that the external linear sliding blocks 11 drive the protective side plates 2 to move up and down, and the purpose of adjusting the overall height of the device is achieved.
The middle partition plate 8 is fixedly installed at the bottom end of the inner side of the protective top plate 1, a dust suction pipe 9 penetrates through the middle position inside the middle partition plate 8, and the upper end of the dust suction pipe 9 is higher than the upper surface of the middle partition plate 8;
the negative pressure fan 10 is rotatably installed at the top end of the inner side of the protective top plate 1, and the wind direction of the negative pressure fan 10 is right downward and upward.
The left side and the right side of the negative pressure fan 10 are symmetrically provided with atomizing nozzles 14, the atomizing nozzles 14 and the storage air bag 13 form a communicating structure through a connecting hose 15, the outer side of the side face of the storage air bag 13 is provided with an extrusion cam 16 rotatably mounted with the middle partition plate 8, the lower end of the extrusion cam 16 is coaxially and fixedly provided with a driven bevel gear 17, the driven bevel gear 17 is in meshing connection with a side face driving bevel gear 18, and the driving bevel gear 18 and the rotating roller 701 are coaxially and fixedly mounted.
In the using process of the device, the negative pressure fan 10 on the inner side of the protective top plate 1 rotates to suck dust generated by blasting to the position, meanwhile, the conveyor belt 7 rotates under the driving of the rotating roller 701 to discharge broken stones falling into the collecting tank 6, the rotating roller 701 drives the driving bevel gear 18 on the side face to synchronously rotate in the rotating process, so that the driven bevel gear 17 meshed with the rotating roller 701 drives the extrusion cam 16 to rotate, the storage air bag 13 is extruded by the extrusion cam 16, water stored in the storage air bag is sprayed out from the atomizing nozzle 14 through the connecting hose 15, and the purpose of dust fall is achieved.
Where details not described in this specification are known to those skilled in the art, it is to be understood that the terms "central", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used in the orientations and positional relationships indicated in the drawings for simplicity of description only, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the scope of the invention.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a but rubble protection machanism for tunnel blasting construction of lifting adjustment, includes the protection roof of being made by the metal sheet, protection roof below left and right sides is provided with the protection curb plate of mutual symmetry, and the left and right sides the lower extreme is provided with moving platform between the protection curb plate, and moving platform lower surface rotates installs the removal gyro wheel, and its characterized in that still includes:
the working platform is fixedly arranged in the middle of the upper surface of the moving platform and used for workers to stand, and rubber anti-skidding materials are arranged outside the upper surface of the working platform;
the damping springs are used for connecting the protective top plate and the protective side plates and are uniformly arranged from front to back at equal intervals;
the collecting tank is arranged outside the left side and the right side of the protective top plate, the collecting tank is in a front-back through concave structure in a front-back view, a conveying belt rotatably mounted with the collecting tank is arranged on the lower surface inside the collecting tank, and the conveying belt is supported by rotating rollers at the front end and the rear end inside the collecting tank;
the middle partition plate is fixedly installed at the bottom end of the inner side of the protective top plate, a dust suction pipe penetrates through the middle position inside the middle partition plate, and the upper end of the dust suction pipe is higher than the upper surface of the middle partition plate;
and the negative pressure fan is rotatably arranged at the top end of the inner side of the protective top plate, and the wind direction of the negative pressure fan is from bottom to top.
2. The liftable rubble protection machanism for tunnel blasting construction who adjusts of claim 1, characterized in that: the protection roof passes through damping spring with constitute elastic construction between the protection curb plate, just the protection roof is whole to be the circular-arc structure with the laminating of tunnel inner wall.
3. The liftable rubble protection machanism for tunnel blasting construction who adjusts of claim 2, characterized in that: the lower end of the inner side of the protection side plate is fixedly provided with a linear sliding block, and the linear sliding block and the moving platform form a lifting structure through an adjusting screw rod.
4. The liftable adjustable broken stone protection mechanism for tunnel blasting construction of claim 1, which is characterized in that: atomizer is installed to negative pressure fan left and right sides symmetry, just atomizer passes through coupling hose and stores the gasbag and constitute the connectivity.
5. The liftable rubble protection machanism for tunnel blasting construction who adjusts of claim 4, its characterized in that: and an extrusion cam rotatably mounted with the middle partition plate is arranged outside the side surface of the storage air bag, and a driven bevel gear is coaxially and fixedly mounted at the lower end of the extrusion cam.
6. The liftable rubble protection machanism for tunnel blasting construction who adjusts of claim 5, characterized by: the driven bevel gear is in meshed connection with the side face driving bevel gear, and the driving bevel gear and the rotating roller are coaxially and fixedly installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210297645.0A CN115030758A (en) | 2022-03-23 | 2022-03-23 | Liftable broken stone protection mechanism for tunnel blasting construction who adjusts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210297645.0A CN115030758A (en) | 2022-03-23 | 2022-03-23 | Liftable broken stone protection mechanism for tunnel blasting construction who adjusts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115030758A true CN115030758A (en) | 2022-09-09 |
Family
ID=83119984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210297645.0A Pending CN115030758A (en) | 2022-03-23 | 2022-03-23 | Liftable broken stone protection mechanism for tunnel blasting construction who adjusts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115030758A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119509409A (en) * | 2024-11-19 | 2025-02-25 | 中南大学 | A gravel size scanning station |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211258663U (en) * | 2019-08-14 | 2020-08-14 | 泉州市雅士轩房地产投资咨询有限公司 | A tunnel temporary protection device |
| CN211396706U (en) * | 2019-11-28 | 2020-09-01 | 张大勇 | Building engineering construction protective structure |
| CN212003203U (en) * | 2020-05-01 | 2020-11-24 | 贵州省质安交通工程监控检测中心有限责任公司 | A tunnel engineering excavation construction bench |
| CN214348529U (en) * | 2021-01-26 | 2021-10-08 | 徐州工业职业技术学院 | Dust collector for computer convenient to clearance |
| CN214603619U (en) * | 2021-05-12 | 2021-11-05 | 青岛润杨木业有限公司 | A dust collection structure for a wood strip surface treatment device |
| CN214739809U (en) * | 2021-04-01 | 2021-11-16 | 李永涵 | Constructional engineering scaffold |
| WO2021237635A1 (en) * | 2020-05-29 | 2021-12-02 | 南京溧水高新创业投资管理有限公司 | Temporary work shed for building construction |
| CN215331646U (en) * | 2021-07-15 | 2021-12-28 | 漳州职业技术学院 | Civil construction engineering construction access way protective device structure |
| CN216008546U (en) * | 2021-08-20 | 2022-03-11 | 中建八局第一建设有限公司 | Safety support structure for tunnel construction |
-
2022
- 2022-03-23 CN CN202210297645.0A patent/CN115030758A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211258663U (en) * | 2019-08-14 | 2020-08-14 | 泉州市雅士轩房地产投资咨询有限公司 | A tunnel temporary protection device |
| CN211396706U (en) * | 2019-11-28 | 2020-09-01 | 张大勇 | Building engineering construction protective structure |
| CN212003203U (en) * | 2020-05-01 | 2020-11-24 | 贵州省质安交通工程监控检测中心有限责任公司 | A tunnel engineering excavation construction bench |
| WO2021237635A1 (en) * | 2020-05-29 | 2021-12-02 | 南京溧水高新创业投资管理有限公司 | Temporary work shed for building construction |
| CN214348529U (en) * | 2021-01-26 | 2021-10-08 | 徐州工业职业技术学院 | Dust collector for computer convenient to clearance |
| CN214739809U (en) * | 2021-04-01 | 2021-11-16 | 李永涵 | Constructional engineering scaffold |
| CN214603619U (en) * | 2021-05-12 | 2021-11-05 | 青岛润杨木业有限公司 | A dust collection structure for a wood strip surface treatment device |
| CN215331646U (en) * | 2021-07-15 | 2021-12-28 | 漳州职业技术学院 | Civil construction engineering construction access way protective device structure |
| CN216008546U (en) * | 2021-08-20 | 2022-03-11 | 中建八局第一建设有限公司 | Safety support structure for tunnel construction |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119509409A (en) * | 2024-11-19 | 2025-02-25 | 中南大学 | A gravel size scanning station |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115030758A (en) | Liftable broken stone protection mechanism for tunnel blasting construction who adjusts | |
| CN110271088B (en) | Glazing device for inner cavity | |
| CN209761491U (en) | Colliery rescue device that comes to roof in pit | |
| CN109464867B (en) | Environment-friendly fog gun machine capable of flexibly adjusting multiple applications | |
| CN216360885U (en) | Water conservancy construction safety protection facility | |
| CN201647654U (en) | Leader transporter | |
| CN219452130U (en) | Hydraulic support device for automatic net hanging of three soft coal layers | |
| CN110670889B (en) | Line drawing device for building construction capable of being used on inclined plane | |
| CN219509123U (en) | Telescopic adjustable platform for building construction | |
| CN218669358U (en) | Entry driving machine protector for coal mine tunneling | |
| CN216682483U (en) | Foam glass plate cutting machine | |
| CN213330066U (en) | Conveying device for concrete mixing | |
| CN214656350U (en) | A suspended hanging basket for maintenance and construction of the outer side of a viaduct | |
| CN117128013A (en) | A safety protection device for rock blast construction | |
| CN113581788B (en) | Safety buffer device for motor vehicle maintenance | |
| CN215593922U (en) | Equipment for overhauling hole flow channel | |
| CN215055098U (en) | Lifting movable type anti-falling device for building construction | |
| CN210332080U (en) | An on-site construction integrated construction equipment | |
| CN113833342A (en) | A monitoring system for foreign personnel in a mining area | |
| CN114803400A (en) | Conveying belt lifting and swinging mechanism for warehousing | |
| CN208347811U (en) | A kind of multifunctional mobile stays lane wall supporting device | |
| CN220182109U (en) | Glass conveying device for hollow glass production | |
| CN217949704U (en) | Scaffold with turnover cover plate | |
| CN209369849U (en) | A protection device for coal mining subsidence area with easy adjustment of angle | |
| CN222730350U (en) | Anti-fall bracket for bridge construction |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220909 |
|
| RJ01 | Rejection of invention patent application after publication |