322results about How to "Guarantee job security" patented technology

The invention discloses a steeply inclined thin ore body mining method suitable for broken surrounding rock conditions. The method comprises the following steps that S1, engineering geological condition investigation is conducted on an ore body and surrounding rock of the ore body, and stope structure parameters are determined; s2, the ore body is divided into chambers and pillars in the trend according to the length of a stope, and continuous stoping is conducted in two steps; s3, a stope preparation cutting project is constructed in the stope; s4, arranging a slope ramp at the middle position of the ore body close to the ore body, constructing a connection roadway to the other side of the ore body from the slope ramp to the ore body, then constructing stoping access roads from the side, close to the side with good surrounding rock stability, of the vertical connection roadway to the two sides, and performing stoping filling step by step; s5, filling is carried out after the first layer is stoped, stoping of a second layer is carried out after filling is finished and design strength is reached, and circulation is carried out until stoping of the stope is finished; through the arrangement of the spiral slope ramp and the layered platforms, the distance between the slope ramp and the stope is reduced, the work amount of the connection roadway is greatly reduced, meanwhile, each layered platform is responsible for one layer, the gradient of the connection roadway is reduced, and ore transportation and equipment operation are facilitated; and meanwhile, the problems that when the steeply inclined thin ore body under the broken surrounding rock condition is exploited in an upward horizontal layered mode, the broken surrounding rock spans, even an ore body top plate cracks, and the safety of stoping operation of personnel under the cracked top plate is poor are solved, and the method has the advantages of being high in safety, efficiency and mechanization rate and the like.

The invention relates to the technical field of wellbore risk evaluation, in particular to a carbon dioxide flooding injection well wellbore integrity risk quantitative evaluation method, which comprises the following steps: constructing an injection well integrity evaluation hierarchical structure model; determining a weight coefficient of each risk index; respectively evaluating each risk index; and calculating a total risk grade score and determining a risk grade. Through the hierarchical model and the determination of the weight coefficient, various risk factors can be comprehensively considered, and detailed evaluation of the integrity of the shaft is realized. Acquisition of real-time data and parameter correction ensure the accuracy and timeliness of an evaluation result, in addition, the method can recognize a high-risk area in advance, early warning and timely treatment are achieved, and the problem that in the prior art, due to the fact that an integrity analysis evaluation method is large in subjectivity, the accuracy and timeliness of the evaluation result are poor is effectively solved. Therefore, the problem of low evaluation accuracy caused by the fact that the integrity risk of the shaft cannot be evaluated more objectively and quantitatively is solved.

The invention provides an aerial work platform safety protection system and a control method thereof.The aerial work platform safety protection system comprises a platform protection device, a bottom vehicle protection device, a platform controller and a main controller, the platform protection device comprises a platform radar, and the bottom vehicle protection device comprises a bottom vehicle radar, an outline marker spotlight and a radar control box; the outline marker spotlight and the bottom vehicle radar are installed on the periphery of the bottom vehicle frame. The method comprises the steps that S1, working area detection and warning are conducted, specifically, a corresponding radar detects a corresponding area, and an outline marker spotlight conducts red light illumination and warning on the road surface around a bottom vehicle; s2, obstacle judgment: when the radar detects that an obstacle exists in the protection area in the protection area, the obstacle is transmitted to the main controller; and S3, stopping warning: executing a stopping working mode according to a judgment result. The corresponding radars are arranged on the platform and the bottom vehicle respectively, and are matched with the area outline marker, so that obstacle recognition in a set range is realized, a corresponding working mode is executed, and the operation safety is guaranteed.

The invention relates to a stacking machine perception interaction system and method for operation interaction. The system communicates with a wharf central control system and comprises a stacking machine body, an electric control cabinet installed on the stacking machine body, a sensing module comprising a plurality of sub-modules and sensors, a decision module and an interaction module. The sensing module is used for acquiring self information and operation environment information of the stacking machine during operation; the decision module is used for controlling each sensor of the sensing module and calling each sub-module according to the operation environment information, and sending a request instruction to the interaction module; and the interaction module is used for interacting with a wharf central control system, acquiring task information, issuing the task information to the decision module, and reporting container number information, operation container truck number information and container position information to the wharf central control system after a container receiving and sending task is completed. Compared with the prior art, the system has the advantages that the operation safety is guaranteed, the intellectualization of operation interaction is realized, the operation of a driver is reduced, and the operation efficiency is improved.

The invention provides a coal mine steel wire rope core flame-retardant conveying belt thickness wear monitoring method and a related device, the method is applied to a conveyor, and the method comprises the steps that thickness data of each thickness monitoring point in a plurality of thickness monitoring points in a preset time period is acquired, a plurality of thickness data sets are obtained, each thickness data set comprises a plurality of pieces of thickness data, and the thickness data of each thickness data set is acquired; each thickness data set corresponds to one monitoring moment; fitting is carried out according to the multiple thickness data sets and the corresponding monitoring moments, multiple fitting straight lines are obtained, and each thickness data set corresponds to one fitting straight line; acquiring the slope of each fitting straight line in the plurality of fitting straight lines to obtain a plurality of slopes; determining thickness wear degree values of the corresponding thickness monitoring points according to the plurality of slopes to obtain a plurality of thickness wear degree values; selecting a thickness wear degree value greater than a preset threshold value from the plurality of thickness wear degree values to obtain at least one target thickness wear degree value; and performing alarm operation according to the at least one target thickness wear degree value.

The utility model relates to the technical field of TBM inclined shaft construction, in particular to a guniting manipulator system for a pumped storage power station inclined shaft TBM. The device comprises a bearing seat, an annular driving assembly, a bearing bottom plate and a telescopic assembly; an annular track is constructed on the bearing seat, and an annular sliding rail parallel to the annular track is further arranged on the bearing seat; the annular driving assembly is in transmission fit with the annular track; a sliding block matched with the annular sliding rail is arranged on the bearing bottom plate, and the annular driving assembly is connected with the sliding block; the telescopic assembly is connected with the bearing bottom plate, and a connecting mechanism used for being connected with a spraying head of the pulp shooting machine is arranged on the telescopic assembly. The method can be suitable for TBM inclined shaft construction, manual work participation is little, and the operation safety of constructors can be guaranteed.

The utility model relates to a drilling tool for a cable bracket on the side wall of a bridge. Comprising a supporting frame, an operating rod and an electric drill fixing frame, the supporting frame comprises a bridge side wall top placing frame and an electric drill containing frame, and the bridge side wall top placing frame is formed by connecting two parallel rods through a transverse connecting rod; the electric drill containing frame is formed by connecting two rectangular frames through a transverse rod and fixedly connected with two parallel rods on the top of the side wall of the bridge, and the two ends of the two parallel rods are perpendicularly connected with two vertical rods respectively. Rolling wheels are installed at the bottoms of rods arranged in parallel on the two bridge side wall top placement frames and the sides, close to the electric drill containing frame, of the two vertical rods arranged in parallel and connected with the rods, an operator standing platform is connected to the bottoms of the two vertical rods close to the side of the control rod, one end of the control rod is connected with the electric drill containing frame, and the other end of the control rod is connected with the electric drill containing frame. The transverse connecting rod is connected with a bridge side wall top mounting frame. The method has the effects of simplicity in operation, high construction efficiency and safety in operation.

The invention discloses a large-span steel truss daylighting roof three-dimensional crawling high-altitude construction system, and belongs to the technical field of building construction. The system comprises an operation part and a protection part, the operation part is installed on a steel net rack, and the protection part is installed between two adjacent structural beams below the steel net rack; the operation part is mainly composed of an operation platform, slings and U-shaped square steel, and the protection part is mainly composed of embedded parts, guide rails, hooks and a safety flat net. According to the system, various problems existing in traditional scaffold erection in the large-span ultrahigh roof construction process are solved, the construction difficulty is greatly reduced, the erection and disassembly construction period is shortened, the project construction progress is accelerated, the operation safety of a construction site is guaranteed, the system can be recycled, the construction period is effectively shortened, and the construction cost is reduced. And good social benefits and obvious economic benefits are obtained.

The utility model discloses a dam grouting cover plate concrete pouring formwork lifting device, and relates to the technical field of water conservancy projects, in particular to a dam grouting cover plate concrete pouring formwork lifting device which comprises a combined steel formwork, and the upper surface of the combined steel formwork is fixedly connected with a supporting plate. A guardrail A is fixedly connected to one side of the supporting plate, and a steel frame is fixedly connected to the other side of the upper surface of the combined steel formwork. During use, after a grouting cover plate foundation is excavated, a winch is installed on the top of the foundation, a balance weight is made, the combined steel formwork is connected through a steel rope, the winch is used for moving the combined steel formwork to the position where concrete is poured, a formwork balance weight block is installed on the combined steel formwork to be fixed after the balance weight is determined, and the formwork balance weight block is moved out after the concrete is poured. And the combined steel formwork is lifted to the position of the next bin to be fixed through a winch, and after the combined steel formwork is lifted, a specially-assigned person is dispatched to the operation platform for plastering of the previous pouring bin.

The invention discloses a tool for live-line mounting and dismounting of a lightning arrester insulating rod, and relates to the technical field of power maintenance. An insulating rod; the clamping mechanism is used for clamping a lightning arrester and comprises a frame body, clamp assemblies, a position adjusting block and a fixing clamp, the frame body is connected with the top end of the insulating rod through a universal locking mechanism, a sliding groove is formed in the frame body in the length direction of the frame body, the position adjusting block is slidably arranged in the sliding groove in a sleeved mode, and the clamp assemblies are fixed to the two ends of the position adjusting block respectively. The distance between the two clamp assemblies corresponds to the distance between porcelain bushings of the lightning arrester. The fixing clamp is arranged at the upper end of the frame body; the bolt disassembling and assembling assembly comprises an electric wrench and a magnetic adsorption sleeve, the electric wrench is fixed to the end of the frame body through a fixing clamp, and the magnetic adsorption sleeve is installed on the electric wrench. The problems that in the prior art, a lightning arrester bolt is not easy to disassemble and assemble, the lightning arrester installation shielding workload is large and the like are solved, the workload of lightning arrester overhaul, installation and replacement is reduced, and the lightning arrester replacement efficiency is improved.

The invention relates to a method, device and equipment for dividing warning areas during ship filling and a storage medium, and belongs to the technical field of traffic ships, the method comprises the steps that a ship simulation model during ship filling is established based on ANSYS Fluent, and ship filling comprises filling from a filling ship to a filled ship; carrying out limit analysis on the ship load working condition based on the ship simulation model to obtain the combustible gas distribution condition of the filling ship and the filled ship under the limit condition; and based on the combustible gas distribution condition of the filling ship and the filled ship under the limit condition, dividing a warning area during ship filling. And safe operation of the ship in the aspects of arrangement scheme, operation process, safety protection, safeguard measures and the like is ensured.

The invention relates to the field of crane jib hoisting load detection, and particularly discloses a large crane jib hoisting load intelligent detection method, which comprises the following steps of: detecting and checking a weighing related sensor before weighing so as to guarantee the precision of a measuring instrument; on the basis of historical weighing data and working environment data of the crane, a temperature-weighing deviation correlation model and a wind power-weighing deviation correlation model are constructed, working environment data when the crane extracts heavy objects are obtained, the compensation amount of the hoisting weight of the crane based on environmental factors is analyzed, and then the preliminarily calculated hoisting weight of the crane is corrected; therefore, the influence of environmental factors on the weighing result is reduced, and the reliability of the weighing result is improved. By monitoring the load moment of each section of suspension arm of the crane in real time and comparing the load moment with the allowable maximum load moment, whether the crane is overloaded or not is judged, and early warning is performed, so that a crane overload evaluation system is perfected, and serious accidents such as tipping of the crane due to overload are effectively prevented.

The invention relates to the field of grain storage, in particular to a grain in-warehouse and out-warehouse system and a grain in-warehouse and out-warehouse method, the grain in-warehouse and out-warehouse system has multiple functions such as grain unloading, warehousing and flattening, is compact in structure and high in integration degree, and meets multiple application scenes such as grain in-warehouse and out-warehouse of a horizontal warehouse; sufficient grain unloading of grain transporting vehicles of various specifications is met, and the device is suitable for horizontal warehouses of various widths and windows of various heights; the control device can achieve automatic control and unmanned operation, the operation safety is guaranteed through remote operation and maintenance, and the operation efficiency is improved; pneumatic conveying is adopted, and the grain breakage rate is low; pollution of dust overflow to the granary is reduced; according to the grain warehouse-in and warehouse-out method, the environment sensing unit, the first dynamic sensing unit and the second dynamic sensing unit are used for providing control signals for the grain warehouse-in and warehouse-out system, automatic control over the grain warehouse-in and warehouse-out system is achieved, manpower consumption is reduced, the grain warehouse-in and warehouse-out efficiency is improved, the grain carrying difficulty is reduced, and the equipment control number is reduced; and the safety of operators is ensured.

The invention discloses a coal mine underground support transfer robot path planning optimization method, and belongs to the technical field of path planning optimization, and the method comprises the following steps: firstly, obtaining information and data; according to the method, through environment information obtained by a sensor and the relation between a starting point and a target point, an off-line path library generated in advance is traversed in sequence, a path with the maximum probability is found to serve as a feasible path, a path containing an obstacle is provided, and the steps are iterated in planning until the target point is reached. According to the method, the optimal path of the current position is not generated in real time under a mine, the optimal path which is most matched with the current position in the off-line trajectory library is retrieved, the problem that the real-time operation speed of an industrial personal computer in a roadway environment is low in a traditional method is effectively solved, the path planning speed and quality can be improved, and the working safety is guaranteed.

The invention relates to the technical field of automatic tapping equipment, in particular to automatic tapping equipment which comprises a working table, a mechanical arm and a three-axis portal frame provided with a drilling machine, universal wheels are arranged on the lower side of the working table, the mechanical arm is fixedly connected to the working table, a protection bin is fixedly connected to the working table, and the drilling machine is arranged on the protection bin. A plurality of supporting columns are fixedly connected into the protection bin, a supporting plate is fixedly connected to the upper sides of the supporting columns, a discharging groove is formed in the center of the supporting plate, a garbage cabinet for collecting waste chips and waste liquid from the discharging groove is fixedly connected to the lower side of the supporting plate, and a positioning assembly for clamping and fixing sheet metal parts is connected to the lower side of the supporting plate. According to the technical scheme, it is guaranteed that the screw tap can operate more stably, the service life of the screw tap is prolonged, the operation safety of surrounding workers is guaranteed, and the workers can conveniently take tapped sheet metal parts.

The invention provides a low-voltage service wire stripping tool, which belongs to the technical field of power distribution operation tools and comprises an upper plier head and a lower plier head, first grooves are formed in the front ends of the inner sides of the upper plier head and the lower plier head, skin breaking mechanisms are detachably mounted in the two first grooves, second grooves are formed in the middle parts of the inner sides of the upper plier head and the lower plier head, and the second grooves are detachably mounted in the skin breaking mechanisms. Two second grooves are formed in the middle of the upper plier head and the lower plier head, a thread breaking mechanism is detachably installed in the two second grooves, the rear portion of the upper plier head and the rear portion of the lower plier head are rotationally connected through a pin, the tail end of the upper plier head and the tail end of the lower plier head are both sleeved with plier handles, and a spring is fixedly connected between the front ends of the two plier handles. The wire cutter is simple in structure and convenient to use, wire skin cutting and rib cutting separation of an insulating layer of an insulated wire can be realized during wire stripping, tools do not need to be replaced, the operation efficiency is improved, and the wire cutter and the rib cutter are connected through screws, can be independently detached and replaced and are convenient to maintain and update.

The utility model discloses a power anti-backflow device for a power management chip, which is provided with a charging management module, an anti-backflow protection circuit and a power management module, and a main control unit receives the input voltage of a charging unit to control the power management module to adjust the charging power of the charging unit to charge a battery. The conversion unit can provide accurate and stable voltage for each module, when the charging unit is powered off, the anti-backflow protection circuit is used for providing anti-backflow protection for a battery, the power management module can provide higher output power, and the power supply adjusting unit comprises a first-stage power supply adjusting circuit and a second-stage power supply adjusting circuit. The first-stage power supply adjusting circuit can enable the circuit to obtain lower standby working current, the second-stage power supply adjusting circuit can reduce loss and obtain higher output voltage, the anti-backflow protection circuit can prevent the problems of reverse connection of a battery and backflow, and the working reliability and safety of the power supply management chip are effectively guaranteed.

The utility model relates to the technical field of hoisting equipment, and discloses multifunctional molten metal automatic carrying equipment in a high-temperature dust environment, which comprises a cart assembly and an overturning assembly arranged at the upper part of the cart assembly, the cart assembly comprises two end beams which are correspondingly arranged in parallel, and a running mechanism is arranged at the lower parts of the two end beams; two bearing beams located at the two ends of the end beams respectively are arranged between the two end beams, lifting oil cylinders which are matched with each other and used for lifting the overturning assembly are arranged on the upper portions of the two bearing beams, the overturning assembly comprises an overturning platform of an L-shaped structure, and overturning frames which are hinged to the upper ends of the vertical sections of the overturning platform and used for vertically clamping steel ladles are arranged on the upper portions of the overturning platform respectively. The overturning oil cylinder is used for pushing the overturning frame and the steel ladle in the overturning frame to overturn; according to the utility model, not only can the pouring operation of molten steel be realized by overturning the steel ladle, but also the lifting adjustment can be carried out through the steel ladle, so that powerful support is provided for the operation of the subsequent iron receiving process and iron returning process.

An automatic grinding device for the internal fillet weld of a flange has a rotating frame, including a fixing button in the center, and three brackets extending outward with the fixing button as the center of the circle. The brackets are provided with adjustment holes, and the clamps are matched with spring latches through the adjustment holes and fixed on the brackets. The clamps clamp a walking mechanism, and the walking mechanism is connected to the grinding mechanism through an automatic flexible feeding mechanism. A walking wheel is fixed at the bottom of the rotating shaft of the walking mechanism, and a rear end supporting wheel is arranged below the walking wheel; the grinding mechanism also has a longitudinal pneumatic transmission feeding mechanism, and a grinding wheel is connected to the bottom of the transmission shaft of the longitudinal pneumatic transmission feeding mechanism, and a front end supporting wheel is also fixed to the grinding mechanism. The present invention is safe and reliable, and the grinding wheel flexibly presses the weld to be ground through the feeding mechanism. The overall weight of the device is light (total weight is about 8KG), and it is easy to disassemble and assemble. It can be fully automatically ground and can be used across specifications, thereby reducing labor costs, improving work efficiency, and ensuring work safety.

The invention relates to the technical field of casting equipment, and particularly discloses a camshaft casting continuous production device and method.The device comprises an electric induction furnace and a slag salvaging mechanism, and the electric induction furnace comprises a furnace body and a support arranged on the furnace body and close to a furnace opening; the slag salvaging mechanism comprises an outer sleeve rotationally connected with the support, a spiral conveyor coaxially arranged in the outer sleeve, and at least one intermittent slag collecting assembly, wherein one end of the outer sleeve extends into the furnace body from the furnace opening. A slag inlet and a slag outlet are formed in the outer sleeve in the axial direction at intervals, the intermittent slag collecting assembly is constructed to continuously collect dross in molten iron in the furnace body and extrude the dross into the outer sleeve from the slag inlet, and the spiral material conveying machine is constructed to continuously convey the dross from the slag inlet to the slag outlet and discharge the dross, so that the time difference between manual slag salvaging and connection of previous and later procedures is effectively solved; the continuity of casting production is guaranteed, and the production efficiency is improved to adapt to the large-scale production requirement; and meanwhile, the consistency of the deslagging degree is ensured through automatic deslagging operation, and the stability of the quality of the camshaft blank is improved.

The invention relates to the technical field of mine car cab structures, in particular to a mine car cab high-safety anti-torsion structure which comprises a mine car body, a cab base is fixedly mounted on the mine car body, a plurality of reinforcing columns are fixedly connected to the cab base, and a cab footstock is fixedly connected to the reinforcing columns. Wherein a retracting and releasing mechanism is rotatably connected in the two reinforcing columns, a moving frame is rotatably connected to the retracting and releasing mechanism, an anti-toppling mechanism is arranged in the moving frame in a sliding fit mode, and a transmission mechanism is rotatably connected in the moving frame. The mine car is supported, the danger that the mine car turns on one side or inclines too much can be effectively avoided, the life safety and operation safety of miners are guaranteed, the stability of the mine car in a complex operation environment is effectively improved, the risk of accidents is reduced, and safety and high efficiency of mine operation are guaranteed.

A monitoring system for the seeding performance of a Panax notoginseng precision seeder belongs to the technical field of agricultural machinery. The invention is composed of an electric control cabinet, a quantitative seed supply device, a socket seed cleaning device, a seeding monitoring device for a seeder, and a speed monitoring device for a seeding device. The quantitative seed supply device can monitor the seed quantity in real time to ensure the best seed filling qualified rate; the socket seed cleaning piece can clean the stuck seeds in real time; the optical fiber transmitting and receiving sensor can monitor the situations of missed seeding, reseeding, and seed guide tube blockage in real time, and adjust the shooting distance to maintain the monitoring accuracy of the seeding monitoring device of the seeder through the functional relationship between the seeder operation time and the shooting distance between the optical fiber transmitting sensor and the optical fiber receiving sensor; the speed sensor can monitor the speed of the seeding device in real time, and give an acoustic and visual alarm to the farmer when the speed of the seeding device is abnormal; all information can be displayed on a display. The invention can improve the automation level of the Panax notoginseng precision seeder, increase the seeding qualified rate, improve the operation efficiency, land utilization rate, and reduce the operation cost.

A battery thermal runaway multi-stage early warning device and its control method belong to the technical field of lithium ion power battery safety monitoring. In the device, the capacitor displacement sensor adopts a parallel plate capacitor structure to monitor the deformation of the battery cell; the three-layer step temperature sensor is composed of three layers of temperature changing materials arranged in concentric circles, independently outputs step signals of three temperature nodes of 85 DEG C, 135 DEG C and 200 DEG C, and realizes the internal temperature monitoring of the battery; the pressure sensor of the pressure relief valve film monitors the pressure change at the battery pressure relief valve. After the signals of various sensors are collected and processed, they are input into the logic judgment unit, combined with the multi-signal composite judgment to output the three-stage early warning signal, and then driven by the isolation driving unit to drive the corresponding LED indication. The valve adopts triple sensing fusion and pure hardware logic hierarchical judgment, realizes accurate early warning of early, middle and late thermal runaway, has fast response speed, high reliability, compact structure and is suitable for various batteries, and can effectively improve the safety of battery use.

The application discloses an automatic replacement system of color photovoltaic adhesive film, and particularly relates to the photovoltaic power station operation and maintenance technical field, comprising a sensing and detecting module, a decision control module, an execution operation module, a material processing and supply module and a safety auxiliary module; the sensing and detecting module is used for acquiring the position, contour and surface state data of the photovoltaic module; the application constructs a three-dimensional grid model of the module through the decision control module, realizes intelligent scoring and global path optimization of the work unit based on a rule base, and generates an optimal work sequence; through adaptive process parameter adjustment in the execution operation module, the hot air power and the winding tension are dynamically adjusted according to the surface color, temperature and defect characteristics of the module, so that the old adhesive film peeling quality and the new adhesive film laying precision are significantly improved; the whole-process automation from detection, decision, execution to quality review is realized, the replacement efficiency and quality consistency are effectively improved, and the work safety is ensured.

The invention discloses a method for automatically delivering and loading cement clinker in bulk by a vehicle. The method comprises the following steps: S1, extracting vehicle information; s2, truck loading information is calculated; s3, the loading information is verified; and S4, automatic truck loading. The cement clinker loading device has the advantages that 1, cement clinker can be uniformly and quantitatively loaded, and the conditions of material scattering, vehicle tie bar collision, non-uniform loading and large weight deviation are avoided; 2, whether loading is compliant or not can be checked, automatic loading is carried out only when loading is compliant, and the condition of illegal loading is avoided; 3, in the loading process, flying dust generated in the loading process can be greatly reduced; 4, the loading times can be reasonably calculated according to the planned loading weight, the carriage height and the tie bar position, and uniform loading of the whole carriage is realized; and 5, automatic delivery and loading of cement clinker bulk are realized, the delivery efficiency is improved, the dust pollution is effectively reduced, and the operation safety in the delivery process is guaranteed.

The utility model relates to the technical field of winch lifting devices, and discloses a safety type double-output winch lifting device which comprises a bottom plate, a plurality of fixing plates are fixedly connected to the side face of the bottom plate, first shells are fixedly connected to the side faces of the two fixing plates, and driving assemblies are arranged on the inner sides of the two first shells. Second shells are fixedly connected to the side faces of the other two fixing plates, clamping assemblies are arranged on the inner sides of the second shells, a plurality of supporting plates are fixedly connected to the side face of the bottom plate, and reciprocating limiting assemblies are arranged on the side faces of the two supporting plates. According to the rope limiting device, the sliding groove lead screw is matched with the limiting rod, the limiting block can move in the direction of the limiting rod, the clamping block moves on the surface of the sliding groove lead screw along with the limiting block, meanwhile, height adjustment of the limiting ring is achieved through the hole shell and the hole plate through the fixing bolt, and therefore the rope is accurately limited. The position of the clamping block on the sliding groove lead screw can be accurately controlled through a groove in the surface of the sliding groove lead screw.

This invention discloses a high-temperature resistant, high-density water-based drilling fluid for ultra-deep wells and its preparation method, belonging to the field of oil and gas drilling technology. The drilling fluid is composed of the following components in parts by weight: 100 parts water, 2-5 parts high-temperature resistant modified clay, 150-280 parts composite weighting agent, 8-15 parts high-temperature resistant polymer filtration loss reducer, 3-8 parts core-shell type high-temperature resistant flow modifier, 4-10 parts nano-composite plugging agent, and 2-5 parts high-temperature stabilizer. This invention effectively solves the technical problems of rheological runaway, increased filtration loss, and barite sedimentation in ultra-deep well high-density water-based drilling fluids under high-temperature conditions above 220℃ by utilizing the high-temperature expansion-disintegration mechanism of the core-shell type flow modifier, nano- to micron-level multi-stage plugging, and the close packing of spherical and irregular weighting materials. It exhibits temperature resistance up to 220℃ and a density of 2.80 g / cm³. 3 It has the advantages of low filtration loss under high temperature and high pressure and good sedimentation stability.

This utility model discloses a safe operating platform for bridge construction, relating to the field of bridge construction. It includes a bottom component, with suspension rods at the upper end of each bottom component. An installation end is fixedly connected to the upper end of each suspension rod, and reinforcing crossbars are fixedly connected to opposite sides of each suspension rod. A side component is located at the lower end of the bottom component. Using this structure, after disengagement, the length of the bottom component can be increased by pulling the side sleeves to both sides. After adjusting the length of the bottom main board, the bottom component can be fixed by connecting the threaded post to the threaded hole, allowing the locking block to engage with the locking hole again. This allows for convenient adjustment of the operating platform's distance to increase the usable area during use. Furthermore, the flexible expansion mechanism allows for quick adjustment of the platform's left and right distance according to actual operational needs, adapting to different scales of work scenarios.

The application discloses an aero-engine cooperative scanning method and device, medium and product. The method comprises the following steps: controlling a continuous detection mechanical arm to perform rough scanning on an aero-engine to obtain a rough point cloud model; forming a plurality of candidate viewpoints according to the rough point cloud model; grouping the candidate viewpoints to obtain a plurality of viewpoint groups and forming a joint frustum visibility matrix; obtaining a target viewpoint group sequence according to the joint frustum visibility matrix; adjusting a bending traction rope and / or a rotating traction rope of the continuous detection mechanical arm to control each industrial camera of the mechanical arm to be positioned at each target viewpoint of each target viewpoint group to perform high-resolution shooting, and obtaining a local fine point cloud; and obtaining a high-precision three-dimensional entity model according to the rough point cloud model and the local fine point cloud. The embodiment of the application fundamentally avoids mechanical interference collision damage, realizes full coverage of a complex curved surface space without dead angle, and improves the three-dimensional reconstruction precision and detection efficiency of the aero-engine.

The utility model discloses a pipeline lifting device of a crane. The upper device and the lower device which are separated from each other are arranged, the lower device is connected and lifted by the steel wire rope through the lifting hook system to control the lower device to ascend and descend, and the upper device comprises a fixing frame, a first limiting device, a rotary driving mechanism, a rotary connecting shaft and a second limiting device. The lower device comprises a rotating column, a limiting rod, a supporting frame, a limiting block and a balance beam, when the limiting rod is connected with the first limiting device in a clamped mode, the rotating column and the fixing frame are mutually fixed, the limiting block is connected with the second limiting device in a clamped mode, and the supporting frame and the balance beam are mutually fixed. The rotary driving mechanism drives the rotary connecting shaft to rotate to drive the balance beam to rotate, so that a steel wire rope can be prevented from being wound when the supporting frame is controlled to rotate, steering control over a pipeline fixed to the supporting frame can be achieved by controlling the supporting frame to rotate, the working intensity is reduced, and the working efficiency is improved. And the operation safety is ensured.