110results about How to "Fast adjustment" patented technology

The invention relates to the technical field of drying equipment, in particular to clothing cloth drying equipment. The clothing cloth drying equipment comprises a box body, a discharging shaft for discharging cloths, a drying module, an ironing module, an air-drying module, a rolling shaft for rolling the cloths and a controller. The top of the left side of the box body is provided with a storinghole for storing the cloths, a damping piece mounted at the bottom of the box body is arranged under the storing hole, and the discharging shaft is vertically mounted on the damping piece. The dryingmodule is used for drying the cloths, the ironing module is used for ironing the cloths, and the air-drying module is used for air-drying the ironed cloths. The rolling shaft is located on the rightside of the air-drying module, a material taking hole for taking out the cloths is formed in the top of the box body over the rolling shaft, the rolling shaft is driven through a rolling motor, and the rolling motor is electrically connected with the controller. The clothing cloth drying equipment is mainly suitable for being used in a clothing manufacturing shop and has the characteristics that the size is small, the weight is small, the price is low, and energy consumption is little.

The invention relates to the technical field of new energy power generation, in particular to a wind power cluster multi-station coordinated adaptive voltage control method, device and equipment and a medium, and the method comprises the steps: constructing a three-layer coordinated voltage control architecture of a wind power cluster AVC master station-AVC coordinated substation-rapid AVC substation, and determining hierarchical control function requirements and interlayer high-speed communication; confirming a reactive power distribution algorithm of the AVC coordination substation and the rapid AVC substation; with the response speed as a reference, reactive power resources are classified, and steady-state replacement control and emergency scheduling mainly participating in reactive power are determined; and designing a voltage control action strategy according to a reactive power distribution algorithm, steady-state replacement control and emergency scheduling, and realizing coordinated adaptive voltage control of multiple stations. According to the invention, the problems of reactive surging and bus voltage oscillation caused by reactive resource response difference and asynchronous communication are improved, the bus voltage regulation speed is improved, and the disqualification probability of the bus voltage is reduced.

The utility model discloses a calibration device for an electronic snapshot system of a fixed black smoke vehicle, which comprises a movable vehicle body, a turntable is rotatably arranged on the vehicle body, a supporting plate is arranged on the turntable, a locking handle is in threaded connection with the supporting plate, the front end of the supporting plate is hinged with a fixed plate, and the rear end of the supporting plate is hinged with a movable plate. The fixing plate is provided with a quick clamp used for fixing the blackness plate, an electric push rod is hinged to the rear end of the supporting plate, the end, away from the supporting plate, of the electric push rod is hinged to the fixing plate, a positioning rod used for supporting the fixing plate is arranged at the rear end of the supporting plate, and the rotating disc is arranged close to the rear end of the supporting plate. Compared with the prior art, dynamic and static calibration of a calibrated object is realized through the rotating turntable, the electric push rod and the moving vehicle body. The overall structure is simple, the adjusting speed is high, and the calibration efficiency is high; and secondly, the framework design is optimized, the rationality and the practical operability of the device are improved, and the weight and the cost are reduced.

The invention relates to the technical field of radio frequency microwave measurement, in particular to a tested piece harmonic test link and an active load traction system and method.The system comprises a control module and a test link. Determining a test signal value of the vector signal source in the test link and a phase adjustable signal value of the first adjustable phase vector signal source according to the target mismatch degree; then, a plurality of impedance points on the Smith chart are simulated by adjusting the amplitude and the phase of the first adjustable phase vector signal source, the vector signal source is controlled to send out a test signal value, and the first adjustable phase vector signal source is controlled to send out a phase adjustable signal value, so that a tested piece is tested; and finally, obtaining a harmonic value corresponding to each impedance point, and obtaining the maximum harmonic of the tested piece under the target mismatch degree according to the harmonic value corresponding to each impedance point. According to the invention, the impedance adjusting range and precision are higher, and the adjusting speed is higher.

The invention relates to the technical field of precision displacement platforms, in particular to a differential type precision displacement platform. According to the technical scheme, the device comprises a rack, and further comprises a coarse adjustment workbench and a precision workbench which are installed on the rack in a sliding mode, a differential fine adjustment assembly which drives the coarse adjustment workbench and the precision workbench to synchronously move in the same direction in a differential mode, and a coarse adjustment displacement mechanism which drives the fine adjustment workbench and the precision workbench to move in the same direction in a differential mode. And the coarse adjustment displacement mechanism drives the coarse adjustment workbench and the precise workbench to quickly move on the rack. Through combined use of the differential fine adjustment assembly and the coarse adjustment displacement mechanism, the problem that the adjustment speed is low due to the fact that the adjustment stroke of fine adjustment is small can be solved, and rapid adjustment is achieved by adopting a large-lead lead screw through the coarse adjustment displacement mechanism.

The invention discloses a tip cutting and sugarcane tip prediction method for a sugarcane harvester, and the method comprises the steps: (1), adjusting the initial position of a camera after the position of the camera is obtained, and adjusting the initial position of the camera to one side without sugarcane interference; (2) obtaining sugarcane tip position data through a camera, processing the data collected in a camera picture by using a sugarcane tip identification model, and preliminarily judging whether a cutter head is too high or too low by using the obtained sugarcane tip position information; (3) performing control coarse adjustment on a tip cutting device through a control algorithm of a single-chip microcomputer according to the position information of the sugarcane tips; and (4) acquiring the position of the sugarcane tip by using a camera, acquiring accurate sugarcane tip position information from the data through a sugarcane tip identification model, judging according to the sugarcane tip identification model and a prediction result, and finely adjusting the tip cutting device through a control algorithm of a single chip microcomputer. According to the method, the impurity rate and the loss rate of the sugarcane harvester during tip cutting can be reduced, and meanwhile a large amount of manual labor is saved.

The invention relates to a rubber material pretreatment control device, which solves the problems that the quality of extruded half parts is poor, the product quality stability is influenced and the subsequent process operation is not easy to control due to poor thermoplastic plastication of an extruder on raw sheet rubber in the production, and is provided with a bracket, a PLC (Programmable Logic Controller) control system, a first temperature detection probe and a temperature control system, the temperature control system is provided with a circulating water temperature control device, an electromagnetic valve, a heating roller and a power system, the PLC control system, the first temperature detection probe, the circulating water temperature control device and the heating roller are installed on the support, the electromagnetic valve is installed on the heating roller, and the power system is connected with the heating roller. The PLC control system is electrically connected with the first temperature detection probe, the electromagnetic valve and the circulating water temperature control device, and the circulating water temperature control device is connected with the heating roller. The device is used in the field of sizing material heating pretreatment.

The utility model relates to an automatic channeling device capable of adjusting the center height. The groove rolling mechanism comprises a groove rolling mechanism body, a base and a groove depth adjusting mechanism, and is structurally characterized by further comprising a screw elevator, an oil cylinder, a coupler, a power source and a steering gear, the screw elevator, the power source and the steering gear are all installed on the base, the power source is connected with the steering gear, and the oil cylinder is connected with the coupler. The steering gear is connected with the screw elevator through the coupler, the channeling mechanism body is installed on the screw elevator, the oil cylinder is installed on the channeling mechanism body, the groove depth adjusting mechanism is installed on the oil cylinder, and the groove depth adjusting mechanism is matched with the channeling mechanism body. The device is reasonable in structural design and convenient to use.

A control method for the analog input / output setting mode of a hydro-generator monitoring system includes a newly added program for identifying input / output pulses. The control logic is as follows: ① If an input pulse command of 1 is detected, the analog input / output setting value = analog input / output setting value + fixed step size; otherwise, the analog input / output setting value remains unchanged. ② If an input pulse command of 1 is detected, the analog input / output setting value = analog input / output setting value - fixed step size; otherwise, the analog input / output setting value remains unchanged. A new analog input / output setting value initialization program is also included, employing the following control logic: When other control modes are switched to analog input / output setting mode, the current input / output setting feedback value sent by the governor is assigned to the analog input / output setting value as the initial value. This invention can improve the guide vane opening and active power regulation speed, enhance equipment stability and reliability, reduce intermediate links and fault points, lower equipment failure rate, and ensure the safe, stable, and high-quality operation of the generator unit and the power grid.

The invention discloses a line reference conversion device, relates to the technical field of machining, and is used for solving the technical problems of machining interruption, pause and large error caused by the fact that a machining machine cannot recognize a line reference in the prior art. The line reference conversion device comprises an alignment assembly, a fixing assembly, an adjusting assembly, a shell and a placing plate, the alignment assembly, the fixing assembly and the adjusting assembly are connected with the shell, the shell is connected with the placing plate, the adjusting assembly is used for adjusting the alignment assembly, and the placing plate is used for placing a workpiece. According to the alignment assembly, the plane where the line reference on the workpiece is located can be converted into the reference plane on the alignment assembly, so that collection, conversion and recognition of the line reference are achieved, errors are reduced, and automatic machining is facilitated.

The utility model discloses a kind of general carriers suitable for a variety of special-shaped PCB mounting, belong to PCB mounting carrier technical field, including shell, the inside fixed connection of shell has carrier plate, by the carrier plate in shell forms storage space, phase-change medium is placed in the storage space;Through the solid-liquid phase change characteristic of phase-change medium, temperature control is carried out with heating coil, can make supporting component with PCB shape dynamic adjustment deployment position and height, after melting, phase-change medium allows supporting component free displacement, after cooling solidification forms stable support structure, can perfectly adapt to different curvature, concave-convex structure special-shaped PCB, solve the problem that magnetic attraction is not stable, easily affect production, the control mechanism set with heating and cooling two modes, phase-change medium can be quickly melted by heating coil, then cooling water circulation is driven by miniature pump body, can be quickly completed medium solidification, simple and convenient to use, and adjustment speed is fast.

The scaffold with the height capable of being rapidly adjusted comprises a scaffold body and an adjusting assembly, the adjusting assembly is movably placed on the upper side of the scaffold body, the four corners of the upper end of a base are each movably provided with a stand column, and a plurality of bearing plates are movably inserted into the upper sides of the four stand columns. Compared with the prior art, the adjusting assembly comprises a first lifting frame, a second lifting frame and a connecting cylinder, and has the following beneficial effects that by arranging the adjusting assembly, the first lifting frame and the second lifting frame can synchronously ascend or descend, a user does not need to manually support the bearing plate to adjust the height, the adjusting speed of the bearing plate is greatly increased, and the working efficiency is improved. And through arrangement of a top plate and an elastic plate, the bearing area of the first lifting frame and the second lifting frame on the bearing plate can be enlarged, meanwhile, direct hard contact between the top plate and the bearing plate can be avoided, damage to the bearing plate in the jacking process is avoided, and the use safety of the adjusting assembly is improved.

The present invention discloses a sample storage device based on a microorganism incubator, and relates to the field of microorganism sample storage. The present invention comprises a box, a storage drawer arranged inside the box, a power assembly, a transmission assembly, a sealing assembly, and a temperature control assembly. By arranging a first sealing portion and a second sealing portion, when the storage drawer is moved out of the box, the storage drawer is away from a delivery pipe, at which time the second sealing portion on the delivery pipe no longer abuts against the first sealing block, the first telescopic rod and the first spring are reset and rebounded, so that the first sealing block seals the opening to prevent the gas in the temperature control chamber from being lost, and at this time the second sealing portion also seals the pipe opening of the delivery pipe to prevent the air in the ventilation pipe from leaking, and prevent the temperature in the incubator from being lost, so that the temperature is balanced before and after storing and taking out the sample, and the growth efficiency and growth environment of the microorganism are guaranteed.

The utility model relates to a multifunctional steam milk bar, including the tubular body, one end connects the steam source, and the other end sets up the blast hole, sleeve, sleeve sets up on the tubular body, the sleeve and the tubular body form the air cavity between, and the sleeve sets up the inflation hole intercommunication air cavity on, around the inflation hole, the surface of sleeve sets up the adjusting cylinder, adjusting sleeve, set up in the adjusting cylinder, adjusting sleeve sets up the air inlet groove A on, the air inlet groove A intercommunication inflation hole, adjusting head, extends into the adjusting cylinder, adjusting head sets up the air inlet groove B on, wherein, the sleeve opening sets up close to the blast hole one end, and the other end of sleeve and tubular body between seal connection, around the axis of rotation adjusting head adjusting head, the air inlet groove A and the air inlet groove B intercommunication or break off, the utility model discloses through the adjusting head on the sleeve, can intercommunication or break off the air inlet groove A and the air inlet groove B, realize the quick switching of multifunctional steam milk bar's work mode, and the switching mode is simple and quick, and the use efficiency of multifunctional steam milk bar is improved.

The utility model discloses a kind of adjustable resistance spin bikes, including spin bike body, flywheel is installed on the spin bike body, the bottom bracket of the spin bike body is fixedly installed with base by bolt, one end of the base is rotatably installed with rotating shaft, the outside symmetry of the rotating shaft is rotatably installed with magnetic resistance component, by hand control adjustment handlebar rotation can be tightened to steel wire rope, can drive rotating shaft rotation, in turn can drive magnetic resistance component rotation along the central axis of rotating shaft, when specified rotation angle interval, the adjustment speed of magnetic resistance area is faster, improve the control effect to flywheel, by when using spin bike body control hand simultaneously holding the handle of spin bike body and adjustment handlebar, by hand control adjustment handlebar rotation can be tightened to steel wire rope, can drive rotating shaft rotation, manually adjustable magnetic resistance area in the use process of spin bike body, convenient to use.

The present invention provides a voltage and frequency regulation control system based on simulation modeling. The power grid connection relationship is drawn according to a primary wiring diagram, basic equipment is simulated and modeled, dynamic and static parameters of the equipment are input, and a network hierarchical topology is built to form a voltage and frequency regulation control system. The frequency and voltage regulation control system includes a power grid main station, a power grid substation, a dynamic monitoring system and a control system. The dynamic monitoring system is used to capture and monitor the dynamic data of various equipment in the power grid main station and the power grid substation in real time, and monitor the data. The control system is used to regulate various parameters of the substation. The power grid main station is used to regulate the power grid substation after summarizing the monitoring data. The present invention realizes real-time monitoring and control of the power grid and rapid frequency and voltage response.

The invention relates to the technical field of coal-fired unit desuperheating water spraying, in particular to a method and system for frequency modulation through coal-fired unit boiler desuperheating water instantaneous water spraying flow. The frequency modulation method using the instantaneous spray water flow of the desuperheating water of the coal-fired unit boiler comprises the following steps: firstly, determining increase or decrease of a unit load corresponding to a primary frequency modulation instruction in a DCS (Distributed Control System) corresponding to the coal-fired unit boiler; secondly, primary boiler desuperheating water instantaneous control logic is added in primary frequency modulation instruction response control logic configuration in the DCS control system, so that the primary boiler desuperheating water instantaneous control logic is controlled according to increase or decrease of unit load; and finally, applying the boiler desuperheating water instantaneous control logic to the opening degree of a desuperheating water control valve in a DCS (Distributed Control System) so as to realize desuperheating water instantaneous water spraying flow control. The method can achieve the quick change of the unit load, and can better respond to the primary frequency modulation signal of the unit.

This invention discloses a device for detecting and clearing ice and snow debris from power lines, comprising five parts: a crawling mechanism, an obstacle-crossing and clearing mechanism, an eddy current heating device, an autonomous power-collecting device, and a drone docking and flight device. The autonomous power-collecting device includes an electromagnetic power-collecting device and a pantograph contact power-collecting device. The crawling device and the eddy current heating device are located inside an openable structure, while the outside of the openable structure is connected to the electromagnetic power-collecting device and the obstacle-crossing and clearing mechanism. Drone docking and flight devices are located on both sides of the crawling device, with the pantograph contact power-collecting device placed on top of the drone docking and flight devices. A main control unit is located between the crawling device and the electromagnetic power-collecting device. This invention solves the problem that traditional mechanical clearing methods easily damage power lines and accelerate wear. Simultaneously, this invention also addresses the safety hazards faced by existing clearing equipment and personnel, as well as the problem of short single-operation time due to battery performance limitations.

The invention relates to a dual-frequency laser frequency aliasing suppression device which comprises a laser, a depolarization light splitting module, a signal detection module, a polarizer and a polarization light splitting module. In the actual use process of the dual-frequency laser frequency aliasing suppression device, polarization state degradation caused by a non-ideal optical element can be compensated through the arrangement of the depolarization light splitting module and the polarization light splitting module, and the optical axis of the polarization light splitting module is enabled to coincide with the polarization direction of the laser of a certain polarization state of the laser output by the laser; therefore, the frequency aliasing in the P light and the S light emitted by the polarization light splitting module is further reduced to a lower level. The optical path structure is simple, the adjusting speed is high, frequency aliasing after double-frequency laser polarization beam splitting can be effectively restrained, and the optical path structure is suitable for the occasion of double-frequency laser interference measurement.

The present invention relates to a method for assembling and adjusting a spliced ​​detector based on an active support structure and a gradient descent method, belonging to the field of optical assembly and adjustment technology, and comprising the steps of: obtaining initial point cloud data of each detector spliced ​​together in a matrix; calculating the initial flatness of each detector; establishing a pin adjustment model, and determining a rotation matrix according to the pin adjustment model; setting an optimization objective function and constraint conditions for the overall flatness of the spliced ​​detector; iteratively solving the optimization objective function using a gradient descent method to obtain a final optimization result, the final optimization result including the optimal rotation angle of each pin of each detector; and performing in-situ correction and assembly of each detector according to the final optimization result obtained to obtain a spliced ​​detector with optimal flatness. The present invention is based on an active support structure and introduces a gradient descent method, and can achieve the purpose of achieving the optimal flatness of the spliced ​​detector by adjusting the pin rotation angle once, with higher assembly and adjustment efficiency and precision.

The utility model relates to the technical field of LED energy-saving lamps, and discloses an LED energy-saving lamp with a dimming function, which comprises an LED energy-saving lamp, the outer surface of the LED energy-saving lamp is fixedly sleeved with a fixing plate, the lower surface of the fixing plate is provided with four sliding grooves and an adjusting mechanism, the adjusting mechanism is arranged on the fixing plate, the adjusting mechanism is used for adjusting the brightness of lamplight, and the adjusting mechanism is used for adjusting the brightness of the lamplight. According to the LED energy-saving lamp with the dimming function, the dimming frame is driven by the electric push rods to pull the supporting rods to rotate, the dimming frame is driven by the electric push rods to rotate, the dimming frame is driven by the electric push rods to drive the dimming frame to rotate, the dimming frame is driven by the electric push rods to drive the dimming frame to rotate, and the dimming frame is driven by the electric push rods to drive the dimming frame to rotate. According to the device, the shading angle of the LED energy-saving lamp can be automatically adjusted, the dimming effect is achieved, and compared with a manual adjusting mode in a comparison patent, the device is high in automation degree, easy to operate, high in adjusting speed and more convenient to use.

The utility model discloses a multifunctional infusion support for an operating room, which relates to the technical field of medical auxiliary instruments and comprises an operating table, two support frames and a guide plate, the two support frames are mounted on the side wall of the operating table, and two ends of the guide plate are respectively connected with the support frames; the device further comprises a sliding block, a locking unit, an electric push rod and a hook part, the sliding block is installed on the guide plate in a sliding mode, the electric push rod is vertically installed on the sliding block, the hook part is installed at the top end of the electric push rod, and the locking unit is installed on the sliding block and used for fixing the sliding block so that the sliding block can not move. The defects that according to an existing operation infusion support, the position of the infusion support needs to be adjusted by manually disassembling and assembling a clamping tool, so that accurate adjustment cannot be achieved, repeated adjustment is possibly needed, and the operation efficiency is affected are overcome. Meanwhile, the problems that an existing hook cannot be stored and adjusted, and practicability is low are solved.

The automobile shock absorber comprises a cylinder barrel, the cylinder barrel comprises an inner cylinder barrel body and an outer cylinder barrel body, the outer cylinder barrel body is arranged outside the inner cylinder barrel body in a sleeved mode, the outer cylinder barrel body is connected with the air bag, a piston rod is movably arranged in the inner cylinder barrel body, the piston rod is provided with an extending end, the air bag wraps the extending end, and the piston rod is connected with a piston assembly. The piston assembly divides an inner cavity of the inner cylinder barrel into a rod cavity and a rodless cavity, the piston rod is provided with an oil through hole and an air through hole, an inner channel is arranged in the piston rod, an adjustable valve element and a valve port are arranged in the inner channel, the adjustable valve element divides the inner channel into a damping channel and an adjusting channel, one end of the damping channel is communicated with the rodless cavity, and the other end of the damping channel is communicated with the valve port. The other end of the damping channel is communicated with the oil through hole through the valve port, the adjusting channel is communicated with the air through hole, the adjustable valve element is provided with a conical part extending into the valve port, the size of a gap between the conical part and the valve port and the size of damping force are adjusted under the pressure difference effect of oil pressure and air pressure, operation is easy, and the adjusting speed is high.

The invention relates to an electric F clamp which comprises a tool rod and a tool head, the end of the tool rod is provided with a square head used for being connected with the tool head, the tool head comprises a fixed clamp body and a movable clamp body, one side of the movable clamp body is provided with a first clamping plate, the other side of the movable clamp body is movably connected with the fixed clamp body, and one side of the fixed clamp body is provided with a second clamping plate. The square head of the tool rod is inserted into the square head sleeve, and the movable clamp body is driven to linearly move through the gear assembly, so that the first clamping plate is close to or far away from the second clamping plate; the tool head of the F clamp drives the square head sleeve to rotate through the tool rod, and the square head sleeve drives the movable clamp body to linearly move through the gear assembly, so that the distance between the two clamping plates is adjusted, the electric and manual dual-adjustment mode is achieved, adjustment is convenient, and the adjustment speed is high.

The invention discloses a transformer nonlinear control method based on an MMC-UPFC structure, and the method comprises the steps: building a mathematical model according to the topological structure of the MMC-UPFC, and analyzing the internal characteristics of the mathematical model; secondly, designing a positive sequence Lyapunov controller and a negative sequence Lyapunov controller under the unbalanced condition of the MMC-UPFC, and carrying out stability proving; then, the signals are transmitted to the MMC through carrier phase-shifting modulation by means of sub-module voltage-sharing control; and finally, an MMC-UPFC simulation system is established to carry out simulation verification. Aiming at the problems caused by the unbalanced condition of a power grid, an inner-loop control method and an outer-loop control method of the MMC-UPFC transformer are respectively designed, and the problems of incomplete decoupling, many control parameters, difficulty in selection and the like in the prior art are solved, so that the problems of low control performance and the like are solved.

This invention provides a wireless charging system based on focus state estimation and dynamic fusion compensation, relating to the field of wireless charging technology. The system consists of two main parts: a ground power supply unit and an on-board charging unit. The two are connected and work collaboratively via a bidirectional wireless communication link and a wireless energy transmission channel based on magnetic field coupling. The ground power supply unit receives DC power input from a DC bus converted from AC mains power and transmits energy to the on-board charging unit via magnetic field coupling; simultaneously, it receives communication signals from the on-board charging unit. The on-board charging unit receives energy from the ground power supply unit via magnetic field coupling, converts it into electrical energy, and supplies power to the vehicle's electrical load. Simultaneously, an observer-based control method is employed to estimate and dynamically compensate for the total disturbance to stabilize the output voltage of the system in real time and transmit control commands to the ground power supply unit.

The utility model provides a cell viability measuring device in a cell culture dish, which belongs to the technical field of measuring devices and comprises a base, the base is connected with a detection sensor, a humidifier and a display instrument, one end of the detection sensor is provided with a detection head, and the base is connected with a control button, a humidity sensor, a sealing door and a temperature sensor. An electric turntable and a placement table are arranged in the base, an electric heating plate and a culture dish are arranged in the placement table, the placement table is connected with a partition plate, and the culture dish is connected with a connecting ring. The culture dish has the beneficial effects that the culture dish is prevented from being accidentally splashed into other culture dishes to cause pollution through the partition plate; meanwhile, fan blades are driven to rotate in the fixed cylinder while the partition plate rotates, so that air flow is better increased, the diffusion speed of temperature or humidity can be increased during heating or humidifying, efficiency is improved, diffusion uniformity is guaranteed, and detection accuracy is improved.

The utility model relates to a first-section derrick positioning device of a petroleum drilling machine. The first-section derrick positioning device comprises a bearing support, a derrick placing structure and a linear motion mechanism. The derrick placing structure is slidably connected to the bearing support. A first mounting position and a second mounting position are arranged on the bearing bracket; the linear motion mechanism is fixedly mounted at the first mounting position, and the motion output end of the linear motion mechanism abuts against the derrick placement structure and can drive the derrick placement structure to linearly slide from left to right; the linear motion mechanism is fixedly installed at the second installation position, and the motion output end of the linear motion mechanism abuts against the derrick placing structure and can drive the derrick placing structure to linearly slide from right to left. The technical problems that in the prior art, when a first-section derrick is installed, multiple cranes need to be adopted for cooperation, the cooperation difficulty is high, the construction risk is large, the needed adjustment time is too long when a main back beam is adjusted, and the installation efficiency is low are solved.