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49results about How to "Guaranteed progress" patented technology

Temporary protection device for stairs

The utility model discloses a temporary stair protection device, and relates to the technical field of building construction. The temporary stair protection device comprises a protection unit, and the protection unit comprises two vertically-arranged vertical rods, a transverse rod arranged between the two vertical rods and embedded parts arranged at the lower ends of the vertical rods; the embedded part comprises an embedded pipe used for being vertically embedded in stair concrete and an annular fixing plate fixed to an opening in the upper end of the embedded pipe. The lower end of the vertical rod is used for penetrating through an inner hole of the annular fixing plate and extending into the embedded pipe. The annular fixing plate is provided with a notch communicated with an inner hole of the annular fixing plate, and the vertical rod is provided with a clamping block which is used for penetrating through the notch and is connected to the lower portion of the annular fixing plate in a clamped mode after the vertical rod rotates. The stair temporary protection device provided by the embodiment of the utility model is simple in structure and high in mounting and dismounting speed, and can ensure the progress and safety of a site for some projects with tight construction periods.
Owner:CHINA MCC5 GROUP CORP LTD

Pile foundation low strain detection method and system based on big data cloud platform

The invention relates to a pile foundation low-strain detection method and system based on a big data cloud platform. The method comprises the following steps that stress wave waveform graph data of a to-be-detected pile foundation are obtained through a stress wave collecting device; performing data classification on the acquired oscillogram according to a preset rule; performing screening evaluation on the classified oscillogram data by using a support vector machine model, outputting an analysis result in an oscillogram form, and adding a defect condition label; performing comprehensive analysis and judgment on the screening evaluation result by using a big data cloud platform, and performing integrity classification on the judgment result according to the occurrence time of a defect reflected wave; and checking integrity classification by using big data cloud platform database information, making accurate pile foundation integrity classification judgment, and outputting a final judgment result.
Owner:XIAMEN SHUXIN CONSTR GRP CO LTD +1

Supervision and management method for construction operation and pre-class education supervision system

The invention discloses a supervision and management method for construction operation and a pre-class education supervision system, and relates to the technical field of data processing. Firstly, learning videos corresponding to all construction workers in the supervision and management system are obtained through matching, and then progress data in learning hosts of all the construction workers are analyzed, so that the safety awareness of the construction workers can be evaluated; and then the safety data of each construction work subordinate sub-region and the behavior characteristic data of each construction worker are analyzed, so that the pre-class education learning effect of the construction worker in the actual work process can be analyzed, potential safety hazards can be identified, the working strategy can be adjusted in time, the accident risk is reduced, and the working efficiency is improved. And finally, comprehensively analyzing to obtain a learning effect evaluation value of the supervision and management method for the construction operation, and further adjusting the supervision and management method, so that the management process can be continuously optimized, and the safety awareness of construction personnel is further improved.
Owner:GUANGZHOU MINGJI INNOVATION TECH CO LTD

Hydrops absorption device for clinical operation

The hydrops absorption device comprises a hydrops collection bottle, a hydrops suction pump is arranged at the top of the hydrops collection bottle, the hydrops outlet end of the hydrops suction pump extends into the hydrops collection bottle, the hydrops suction end of the hydrops suction pump is fixedly connected with a connecting hose, one end of the connecting hose is fixedly connected with a leading-out pipe, and the other end of the connecting hose is fixedly connected with a connecting rod. One end of the eduction tube is fixedly connected with an impurity treatment cylinder, a filter screen is fixedly connected in the impurity treatment cylinder, and a crushing and scraping device is arranged at the bottom of the filter screen. The power of the motor and the liquid suction pump is dynamically regulated and controlled by constructing the regulation and control coefficient XQ, then the suction progress of the seroperitoneum and the quality of the suction effect are guaranteed, operation is easy, and popularization is convenient.
Owner:MATERNAL & CHILD HEALTH HOSPITAL OF GUANGXI ZHUANG AUTONOMOUS REGION GUANGXI ZHUANG AUTONOMOUS REGION

Rubber belt conveyor for coal receiving along with machine

The invention relates to the technical field of rubber belt conveyors, in particular to a machine-following coal receiving rubber belt conveyor which is characterized in that an adjusting mechanism and a butt joint mechanism are arranged on a conveying frame, and a matching mechanism is arranged on the butt joint mechanism; through the butt joint mechanism, the barrier strip on the dip angle rubber belt conveyor can be quickly and independently disassembled, so that the overall cleaning and maintenance operation is greatly simplified, the overall cleaning and maintenance efficiency is improved, and the damaged barrier strip is independently disassembled and replaced, so that the labor intensity of workers is reduced. The whole conveying efficiency and effect of the dip angle rubber belt conveyor can be prevented from being influenced due to damage of a small part of barrier strips; through the adjusting mechanism, the rubber belt conveyor can be rapidly adjusted and switched between the horizontal conveying mode and the inclined conveying mode, and through cooperation of the butt joint mechanism and the matching mechanism, the barrier strips can be rapidly and uniformly installed and fixed and adaptively adjusted so as to adapt to different conveying modes of the rubber belt conveyor.
Owner:INNER MONGOLIA MANSHI COAL GRP CANZIGOU COAL CO LTD

Method for reinforcing vacuum preloading soft foundation by using high-pressure sand blasting pile

The invention discloses a method for reinforcing a vacuum preloading soft foundation by using a high-pressure sand blasting pile, which comprises the following steps: step 1, firstly leveling a site, then exploring the soft foundation, ascertaining a geologic structure in a soft soil foundation to be treated, and then paving a lower drainage cushion layer; step 2, measuring a discharge point, and placing a pile forming system in place; thirdly, a pile forming system is used, a hole is drilled in the pile forming point position, then high-pressure rotary jet grouting pile forming construction is conducted, and a high-pressure sand jet pile is constructed; fourthly, an upper drainage cushion layer is paved, a filter pipe is arranged in the drainage cushion layer, geotechnical cloth and a sealing film are paved on the drainage cushion layer, and the periphery of the geotechnical cloth and the sealing film are embedded into the impermeable stratum to seal the drainage cushion layer; 5, the filter pipe extends out of the geotechnical cloth and the sealing film through a film outlet device and is connected to a vacuumizing device; and sixthly, the vacuumizing device is started, and vacuum preloading drainage is conducted on the soft soil foundation.
Owner:TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2

CNC automatic machining positioning device

The utility model discloses a CNC automatic machining positioning device, and relates to the technical field of machining. Comprising a fixing plate; the supporting assembly is arranged on the outer side of the fixing plate and used for supporting the workpiece; the clamping assembly is arranged on the outer side of the supporting assembly and used for fixing the position of the workpiece; and the control assembly is arranged in the supporting assembly and used for controlling the clamping assembly, the supporting assembly comprises a supporting block and a positioning block, and the supporting block is arranged on the first plane of the fixing plate. Through the arrangement of the telescopic rods, the connecting plates, the connecting rods, the supporting columns, the sliding columns and the pressing plates, cooperation of the telescopic rods, the connecting plates, the connecting rods, the supporting columns, the sliding columns and the pressing plates is achieved, and therefore the multiple pressing plates can move at the same time, and it is guaranteed that stress is even when a workpiece is fixed; the problem that the extrusion force of the bolt is difficult to control in the process that the bolt extrudes the pressing plate, so that the workpiece is uneven in stress and inclined is solved, and the workpiece machining progress is ensured.
Owner:SICHUAN YITIAN TECH CO LTD

A Big Data-Based Intelligent Control System and Method for Power Engineering

This invention relates to the field of power engineering management and control and virtual power plant operation collaboration technology, specifically to a big data-based intelligent management and control system and method for power engineering. It collects and evaluates the quality of multi-source heterogeneous data from power engineering sites to obtain reliable data for engineering risk prediction, while simultaneously extracting feature data related to virtual power plant operation. Furthermore, it identifies and aggregates dispatchable load resources at the engineering site to form standardized virtual load packages. Combining the operational demand signals of the virtual power plant with the engineering risk status, it generates dispatch decision schemes through collaborative optimization calculations. Blockchain technology is used to ensure the reliable storage of dispatch instructions, execution, and result data, and based on this, automatically calculates collaborative benefits. This effectively solves the problem in existing technologies where power engineering management and control data are disconnected from virtual power plant operation, preventing a shift from passive risk warning to proactive value mining.
Owner:CHONGQING ZHONGXIN DINGSHENG ENERGY CO LTD

Product separating device and conveying system

ActiveCN224185167UImprove the phenomenon of head-to-tail overlayAvoid material jamsConveyor partsMechanical conveyorsMechanical engineeringSemiconductor
The utility model relates to the technical field of semiconductor manufacturing, and provides a product separating device and a conveying system. The product separating device comprises a first blocking piece, a second blocking piece and a driving assembly. The first blocking piece and the second blocking piece are arranged in the first direction, and a set distance is formed between the first blocking piece and the second blocking piece in the first direction. The first blocking piece and the second blocking piece move in the second direction, and an included angle is formed between the first direction and the second direction; the driving assembly is connected with the first blocking piece and the second blocking piece and used for driving the first blocking piece and the second blocking piece to move in the second direction. The product separating device can control the feeding rhythm of products, the phenomenon that adjacent products are stacked end to end is improved, and then the phenomenon that materials are stuck in the product conveying process is improved.
Owner:JIGUANG SEMICON (SHAOXING) CO LTD

Direct current measurement protection device

The utility model provides a direct-current measurement protection device, which belongs to the technical field of measurement protection, aims to solve the problem that a conventional direct-current resistance tester is easy to damage and affects the progress of measurement, and comprises a box body, a positioning shaft, a storage cylinder, a lead, a mounting block, a control panel, a positioning plate and a positioning hole, the positioning shafts are fixedly connected to the left side and the right side of the box body; the storage cylinders are fixedly connected to the left side and the right side of the box body; the wire is slidably connected to the outer side of the storage cylinder. The mounting block is fixedly connected to the outer side of the wire; the control panel is slidably connected to the middle of the mounting block; the positioning plate is slidably connected to the right side of the mounting block; the positioning hole is formed in the middle of the control panel; according to the utility model, the direct current resistance tester is prevented from being damaged, the maintenance frequency of the direct current resistance tester is effectively reduced, the progress of measurement work is ensured, the structure is simple, and the production is convenient.
Owner:YUNNAN ZHONGSHUO ENGINEERING TECHNOLOGY CO LTD

Design method for multi-layer continuous truss support structures for ships

This invention relates to the field of shipbuilding technology, and more particularly to a design method for a multi-layer continuous truss support structure for ships, comprising the following steps: fixing support columns between adjacent decks vertically, the support columns being located at deck transverse beams, and the support columns on the same vertical line forming support columns; arranging multiple rows of the support columns at intervals along the ship's width; arranging multiple rows of the support columns at intervals along the ship's length, each row of support columns being located on the same straight line and arranged at the long longitudinal bulkheads of the hull; arranging deck longitudinal girder below each deck along the ship's length, the deck longitudinal girder connecting to the deck transverse beams and the corresponding support columns, such that the deck longitudinal girder, the support columns, and the deck transverse beams form a truss support structure. This invention can ensure the progress and quality of the design and improve space utilization.
Owner:GUANGZHOU SHIPYARD INTERNATIONAL LTD

Transportation and installation equipment for TBM water conveyance tunnel lining steel pipe and transportation and installation method

ActiveCN121404740BReduce installation and construction costsSolve installation and construction problems
The application relates to a TBM water conveying tunnel lining steel pipe installation and transportation equipment and a transportation and installation method, which comprises a track transportation system, a transfer system, a wheeled transportation system, an installation butt joint device and a temporary support type steel, wherein the track transportation system is arranged in a drill-and-blast tunnel section, the transfer system is arranged at the junction of the drill-and-blast tunnel section and a pipe piece tunnel section; the wheeled transportation system is arranged on the pipe; the installation butt joint device is arranged at the end of the lined section; the track transportation system and the transfer system share the same set of tracks at the intersection; the TBM water conveying tunnel lining steel pipe installation construction with an engineering quantity less than 1 km can be facilitated, the construction efficiency is improved, and the cost is reduced.
Owner:SINOHYDRO BUREAU 14 CO LTD

Positioning tool for flange production and machining

The utility model discloses a positioning tool for flange production and machining. The positioning tool comprises a base. The bottom of the movable plate is fixedly connected with the top of the base; the outer surface of the stud is fixedly connected with the front surface of the movable plate; the back face of the spring is fixedly connected with the inner surface of the movable plate, and the spring is used for preventing the component from falling off. According to the scheme, the round hole in the middle of the flange is fixed to the upper face of the adjusting mold, then the adjusting mold and the movable column are screwed in a threaded mode, the adjusting mold is clamped in the middle of the movable plate through the buckle, after the movable plate slides to the designated position, the stud is used for fixing the movable plate, the first motor is turned on, and the first motor is turned on; according to the flange machining device, the supporting frame is moved to a proper position to start machining, flanges of different diameter sizes can be fixed and machined by arranging a moving plate, a stud, a buckle, a moving column and an adjusting mold, so that the efficiency of flange machining operation can be improved, dismounting and mounting are convenient, and the subsequent flange machining progress is guaranteed.
Owner:ZHAOQING AIGERT STAINLESS STEEL PROD CO LTD

Soft foundation compacting and drainage reinforcing method combining high-pressure sand blasting pile and heaped loading

The invention discloses a high-pressure sand blasting pile combined loading soft foundation compaction and drainage reinforcement method which comprises the following steps: step 1, firstly, leveling a site, then, carrying out soft foundation exploration, ascertaining a geologic structure in a soft soil foundation to be treated, and then, paving a lower drainage cushion layer; step 2, measuring a discharge point, and placing a pile forming system in place; thirdly, a pile forming system is used, a hole is drilled in the pile forming point position, then high-pressure rotary jet grouting pile forming construction is conducted, and a high-pressure sand jet pile is constructed; 4, paving a drainage cushion layer on the upper layer, and arranging a water filter pipe in the drainage cushion layer; 5, geotextile is laid on the drainage cushion layer, and a water filter pipe in the drainage cushion layer is led out and connected with a drainage system; and sixthly, stacking and loading materials on the geotechnical cloth step by step, and carrying out stacking and pre-pressing drainage on the soft soil foundation.
Owner:TIANJIN PORT ENG INST LTD OF CCCC FIRST HARBOR ENG +2

Negative pressure drainage device with visual negative pressure value

The utility model discloses a negative pressure drainage device with a visual negative pressure value. The negative pressure drainage device comprises a drainage tube, a negative pressure ball, a liquid drainage tube, a negative pressure sensing device, a displayer and a negative pressure control device. Negative pressure is generated by squeezing the negative pressure ball, the range of the negative pressure value is set, when the negative pressure value exceeds the set range, opening and closing of the valve are controlled through the negative pressure control device, alarm information and alarm sound are displayed, the size of the negative pressure value can be displayed on the displayer in real time, the negative pressure value can be conveniently and accurately controlled, a patient can be better recovered, and the negative pressure value can be accurately controlled. And the whole device is simple to operate, small in size and convenient to carry.
Owner:THE THIRD PEOPLES HOSPITAL OF SHENZHEN

Code management method and system, electronic equipment and storage medium

The invention provides a code management method and system, electronic equipment and a storage medium. The code management method comprises the steps that when it is confirmed that a target device stores a development source code and the development source code is in an editing state, the target source code is obtained according to a preset frequency, the target source code is the edited version of the development source code, and the development source code is obtained from a server; when the target source code meets a grammar check rule, generating difference data of the target source code and the development source code, the difference data being used for forming an editing process including an editing time node; and uploading the target source code to the server and generating a code uploading notification based on the difference data, wherein the target source code is used for replacing a development source code having a corresponding relationship with the target device in the server. The method and device are used for improving the code management effect when the code items are jointly managed.
Owner:NIUXIN SEMICON

Method, device and system for reviewing progress of nuclear power plant conventional island digital design model

The application relates to a nuclear power plant conventional island digital design model progress review method, device and system, the method comprising the following steps: receiving three-dimensional model data sent by each design professional terminal; performing automatic collision checking according to the three-dimensional model data; and feeding back model checking results to the related design professional terminal, so that the arrangement cooperation between the professionals in the design process can be realized, the cooperation between the nuclear power plant conventional island model professionals in the design is improved, the design product quality is improved, the drawing progress and the construction progress are guaranteed.
Owner:CHINA POWER ENG CONSULTING GRP CORP EAST CHINA ELECTRIC POWER DESIGN INST

A method and tooling for forming a reinforced wall panel with exposed ribs through co-curing and co-adhesion.

ActiveCN121552713Bavoid deformationPrevent glue accumulation
This invention relates to the field of aerospace composite material component manufacturing technology, and discloses a method and tooling for forming a reinforced panel with exposed ribs through co-curing and co-bonding. By setting a positioning component at the opening position of the skin-laying tooling for fixing a filler block, after the corresponding opening position of the skin is completed, the stringer ribs and the skin with the opening are co-cured and co-bonded to form a reinforced panel. This invention utilizes a filler block fixed on the positioning component to fill the opening position of the skin. The surface structure of the filler block is consistent with the surface structure of the skin opening at the corresponding position, effectively avoiding the problem of glue accumulation caused by glue overflow during the curing process, while supporting the stringer ribs and preventing deformation. Furthermore, it solves the problem of ensuring the continuity of the ribs while opening the skin at the connection position in a reinforced panel with exposed ribs that cannot be mechanically cut, thus ensuring the development and mass production progress of the aircraft model.
Owner:SHAANXI AIRCRAFT CORPORATION

Method for producing low-radioactive background metal material by using vacuum electroslag furnace and its application

ActiveCN115216638Blow radioactivityRadioactive background reductionElectrode placementOrganic solvent
The present invention provides a method for producing low-radioactive background metal materials by using a vacuum electroslag furnace and its application, comprising: selecting raw materials, wherein the radioactivity of key radioactive nuclides in the raw materials is respectively less than or equal to 50 mBq / kg, and the raw materials include: metal raw materials to be smelted and electroslag raw materials; using the electroslag raw materials to prepare low-radioactive background electroslag; using an organic solvent to clean the inner wall of the vacuum electroslag furnace, the organic solvent used needs to pass the radioactivity detection and the detection result is qualified, and the residual organic solvent is removed; in the cleaned vacuum electroslag furnace, the metal raw materials to be smelted are made into electrodes, the low-radioactive background electroslag and the electrodes are placed, and the metal is obtained after smelting; wherein the low-radioactive background electroslag extracts the key radioactive nuclides in the metal raw materials to be smelted.
Owner:SHANGHAI JIAOTONG UNIV

Pipeline connecting device and pipeline splicing structure

The utility model provides a pipeline connecting device and a pipeline splicing structure, the pipeline connecting device is used for connecting two adjacent pipelines, the faces, close to each other, of the two adjacent pipelines are a first face and a second face respectively, the pipeline connecting device comprises a first fixing piece, a second fixing piece and a third fixing piece, the first fixing piece is connected with the first face and the second face; the first connecting assembly is connected with the first fixing piece and a pipeline where the second face is located; the second connecting assembly is connected with the first fixing piece and a pipeline where the second face is located, and the second connecting assembly and the first connecting assembly are arranged in a stacked and staggered mode; the multiple reinforcing pieces are arranged on the sides close to the first connecting assembly and the second connecting assembly, and the multiple reinforcing pieces are wrapped by the first connecting assembly and the second connecting assembly; wherein a pouring material covers the outer part of the pipeline connecting device. According to the utility model, the connection between the pipelines is more convenient and quicker.
Owner:NINGBO YONGGONG TECHNOLOGY CO LTD

Oil exploitation sampling device

The utility model relates to the technical field of oil exploitation, and discloses an oil exploitation sampling device which comprises a box body, a mounting plate is arranged in the box body, a drill rod is arranged on the lower side of the mounting plate, a sampling bin is fixedly connected to the lower side of the drill rod, and a drill bit is arranged at the lower end of the sampling bin. An electric push rod is arranged in the drill rod, the telescopic end of the electric push rod penetrates into the sampling bin in a sliding mode, the telescopic end of the electric push rod is fixedly connected with a push plate, and through cooperation of a fixing ring, a sealing ring, a filter plate, a flow guide block and other structures, petroleum is filtered, so that the sampling efficiency is effectively improved, and the service life of equipment is effectively prolonged; meanwhile, the condition that impurities are mixed into the sample is effectively avoided, the accuracy of subsequent petroleum sample detection is improved, a reliable basis is provided for subsequent production and analysis, and the practicability is high.
Owner:QINGDAO DONGPENG ENVIRONMENTAL PROTECTION TECH CO LTD

Calcium chloride steel structure belt vestibule replacement construction method

The invention is suitable for the technical field of construction, and provides a replacement construction method for a calcium chloride steel structure belt vestibule. Comprising the following steps that a newly-built and updated truss is used for supporting a belt conveyor, and the newly-built truss is of an upper inverted structure; the belt conveyor is separated from the original truss of the vestibule, and the load of the belt conveyor is transferred to the updated truss; and after the vestibule component is replaced, repaired and newly built, the belt conveyor support is connected with the newly-built vestibule component, and then the updated truss is installed in a segmented mode. According to the method, the engineering quality is well controlled, the safety and progress are guaranteed, the engineering completely meets the design requirements and the specifications and regulations, the expected goal is achieved, and the safety and quality of high-risk construction of the vestibule are guaranteed; the construction method is clear, construction is orderly and rapid, labor efficiency is high, and construction cost is low. The whole technological process is remarkable in effect in practical application, good in field use effect and full of users.
Owner:PANGANG GRP ENG TECH

Auxiliary equipment for special-shaped hard alloy machining

The utility model discloses auxiliary equipment for special-shaped hard alloy machining, and relates to the field of special-shaped hard alloy machining, the auxiliary equipment comprises a fixing plate and a bottom plate, the bottom of the fixing plate is fixedly provided with a driving guide rail, the two sides of the front face of the driving guide rail are respectively provided with a clamping jaw, and the top of the fixing plate is fixedly provided with a micro pump machine. The tail end of the clamping jaw can be driven by the driving motor to be adjusted in the inner cavity of the driving guide rail, so that the clamping jaw can be directly driven to clamp a workpiece, water can be directly sprayed to a cutting position through the flushing mechanism when the workpiece is machined after being clamped and cutting is needed, the cutting effect is guaranteed, and if drilling is carried out, the machining efficiency is improved. According to the machining auxiliary device, the suction and removal mechanism and the exhaust fan are matched with each other, generated chippings and dust are sucked and removed, and therefore the good auxiliary effect on machining of workpieces can be achieved, and the machining effect and progress are guaranteed.
Owner:ZHUZHOU OUQI CEMENTED CARBIDE CO LTD

Movable constructional engineering dust falling equipment convenient to adjust

The utility model relates to the technical field of constructional engineering dust falling, in particular to a movable constructional engineering dust falling device convenient to adjust, which comprises a bottom plate, a water tank fixedly connected to the top surface of the bottom plate and universal wheels mounted on the bottom surface of the bottom plate, and one side of the water tank is connected with a water pump through a water outlet pipe. The output end of the water pump is connected with a hose through a water conveying pipe, the upper end of the hose is connected with a sprayer through a water spraying pipe, the upper end of the bottom plate is rotationally connected with a supporting rod, an electric telescopic rod is arranged at the upper end of the supporting rod and connected with the water spraying pipe, and a reciprocating movement mechanism for controlling the supporting rod to rotate is installed on one side of the supporting rod. According to the dust falling equipment, the water spraying height and angle can be conveniently adjusted, water is uniformly and effectively sprayed for dust falling, the dust falling effect and the working efficiency are improved, rapid construction engineering work is guaranteed, the construction engineering progress is guaranteed, operation is easy, convenient and flexible, and practicability is high.
Owner:CHINA STATE CONSTR PORT ENG GRP

A fully prefabricated assembled composite pipe gallery support construction structure and technology

The present invention belongs to the technical field of comprehensive pipe gallery construction, and specifically relates to a fully prefabricated assembled superimposed comprehensive pipe gallery support construction structure and process, including a prefabricated comprehensive pipe gallery, and also including prefabricated support piles, prefabricated external anchor piles and prefabricated crown beams, adjacent prefabricated support piles are connected together by sockets, prefabricated support piles and prefabricated external anchor piles are connected together with prefabricated crown beams by sockets, and the prefabricated comprehensive pipe gallery and the prefabricated support piles are connected by wet method. The present invention adopts prefabricated assembled structural parts for construction from the foundation pit support of the comprehensive pipe gallery construction to the main structure in the later stage, and fully adopts the superposition of the support structure and the main structure, reduces the thickness of the main structure, reduces the steel and concrete usage of the structural parts, saves costs, reduces the construction area, and shortens the construction period.
Owner:JINAN URBAN CONSTRUCTION GROUP CO LTD

Mechanical excavation method for surrounding cavern

The invention discloses a rock surrounding cavern mechanical excavation method which comprises the following steps: S1, supporting a cavern top arch, excavating a cavern tunnel face, and lofting a contour line; s2, drilling a plurality of contour holes along the contour line; s3, a center hole is excavated in the lower position of the center of the tunnel face, and layer-by-layer excavation is conducted along the upper portion and the two sides of the center hole; s4, the upper portion and the two sides of the center hole are excavated to the position with the designed depth being 0.5 m, two rows of excavation holes are formed in the lower portion of the center hole, and then the tunnel face of the cavern on the lower portion of the center hole is excavated to the position with the designed depth being 0.5 m according to the sequence from top to bottom; s5, after excavation is completed, measurement is conducted, the under-excavation position is marked, the under-excavation position is chiseled away, and excavation of the position with the design depth being 0.5 m is completed; and S6, the steps S1 to S5 are repeated, and excavation of the surrounding cavern is completed. According to the mechanical excavation method for the surrounding rock cavern, the problem of serious overexcavation of the side top arch of the cavern caused by traditional excavation is solved.
Owner:XINHUA (BURQIN) PUMPED STORAGE POWER GENERATION CO LTD

Fire door resistance to water spray impact tester

ActiveCN224303475UProtected from impact damageEasy to adjust and change the diameterMaterial strength using single impulsive forceWater flowScrew thread
The utility model relates to fire fighting equipment detection technical field discloses a kind of fire door anti-spraying water impact tester, including fire hose, the inside left side of fire hose is fixedly connected with round, the inside fixedly connected with cylinder in round, the outside sliding connection of cylinder has slip ring, the outside right side of slip ring is fixedly connected with spring a.In the utility model, first, slip ring is pushed back under the action of water flow pressure and is slid on cylinder to round inside, let water flow pass smoothly, when water flow appears backflow trend, slip ring will be quickly reset under the action of spring a elasticity, form tight seal, to block reverse water flow, simultaneously, when rotating handle on top layer moves down, water flow resistance increases by thread transmission to drive pressing plate to move down, inside flow cross-sectional area reduces at this time, water flow resistance increases;Conversely, the extrusion force of water decreases, water pressure reduces, it is convenient to adjust and change hose pass diameter, promote the progress of experiment.
Owner:LIAONING TIANDOU TECH CO LTD