118results about How to "Reduce the difficulty of laying" patented technology

The invention discloses an analog simulation experiment system and method based on a 3D printing rapid prototyping technology. A blending module is connected with an experiment module through a printing material laying module. A control module is connected with and controls the blending module, the printing material laying module and the experiment module. The control module is used for forming a 3D digital model of an analog simulation experiment. The control module controls the experiment module to be adjusted to a state suitable for printing the 3D digital model, controls the blending ratio of the blending module through electromagnetic valves and controls the printing material laying module to carry out 3D material laying at the experiment module through a direction control mechanism and reversing valves. The analog simulation experiment system and method can be used for laying rock models on complex geological structures, where the models cannot be laid through traditional measures, such as fold, faults and collapse columns, the model size precision is high, and therefore the system and method can be better used for observation and study of complex rock engineering such as the working seam overlaying strata movement rule, the roof caving regularity, and the relation between the roof moving features and forms and stability time after working face mining.

The invention discloses a foamed warm mix asphalt mixture and a preparation method thereof. The foamed warm mix asphalt mixture is obtained by treating 2-8.5% of foamed asphalt, 2-90% of novel aggregate (or 6-90% of old asphalt pavement material) and 1-15% of mineral powder according to a special process. Asphalt is foamed through the special process, the volume of the foamed asphalt is increased by above 10 times, and the viscosity is remarkably reduced. Therefore, the mixture can be uniformly mixed at a lower temperature of 100-150 DEG C, so that asphalt fume in the production process is avoided, and the energy consumption for preparing asphalt mixture is lowered. The asphalt mixture is completely attached to the surface of the building stones to form asphalt films. After the water is volatized, the asphalt mixture with better performance is formed. Compared with conventional asphalt mixture, the foamed warm mix asphalt mixture has the advantages that the mixing temperature can be reduced by 30-60 DEG C, and the paving difficulty is reduced.

The invention discloses a rainwater penetrating-discharging integrated ecological system, which comprises penetration inspection wells distributed on the ground of residential areas, penetration drainage ditches which are in a network shape and connected on all the penetration inspection wells and transversal connecting pipes between the penetration inspection wells and the penetration drainage ditches. Permeable holes are formed on the side walls and at the bottoms of the penetration inspection wells, a gravel layer is laid in the peripheries of the penetration inspection wells, a layer of permeable geotextile is laid in the peripheries of the gravel layer, wellheads of the penetration inspection wells are provided with dirt-catching and sewage-blocking baskets therein and permeable well covers are covered on the wellheads; permeable holes are formed on the side walls of the penetration drainage ditches, the peripheries of the penetration drainage ditches are provided with the gravel layer, the peripheries of the gravel layers are provided with a layer of permeable geotexile, and the top parts of the penetration drainage ditches are covered with grate covers of the drainage ditches. The invention has the advantages of simple design principle and convenient construction. The invention can save water consumption, reduce rainwater runoff in a city and relieve municipal drainage pressure, thereby not only realizing early draining of rainwater, purifying water, but also realizing the penetration of rainwater, conserving underground water source and beautifying the peripheral ecological environment.

The invention discloses a quantum key service network system with a center, which mainly solves the technical and cost problems of establishing a large-scale quantum communication network and the problem of low service efficiency. The network provided by the invention comprises a plurality of quantum communication subnets with star-shaped topological structures and safety channels among the quantum communication subnets; The quantum communication subnet comprises a quantum center node, a plurality of quantum service nodes, a quantum optical fiber channel for connecting the quantum center nodeand the quantum service nodes, and a public communication network; Shared keys are distributed among different quantum center nodes through a security channel; The quantum center node and the quantumservice node share a quantum key through quantum link negotiation; And online agreement session keys are provided between the application terminals through the quantum key service network center. Thenetwork laying difficulty is low, the cost is low, centralized management and control are easy, and the service efficiency and the cost performance are higher; The system has a wide application prospect in the field of network security.

The invention discloses a novel municipal garbage can. The novel municipal garbage can comprises an outer barrel, wherein the outer barrel is internally provided with an inner barrel, and the lower end surface of the inner barrel and the inner bottom wall of the outer barrel are jointly and fixedly connected with a plurality of buffer springs. A barrel cover is disposed right above the inner barrel, and a throwing opening for throwing garbage is formed in the upper end surface of the barrel cover. An annular clamping groove is formed in the edge of the upper end of the inner barrel, and the lower end surface of the barrel cover is fixedly connected with an annular clamping block. The upper end outer wall of the inner barrel is fixedly connected with an annular sliding block in a sleeved mode. The novel municipal garbage can has the advantages that cleaning staff presses to release the barrel cover, the characteristics of the self-recovery of the buffer springs and a driving magnetic block attracting a driven magnetic block are used, the movement of the inner barrel drives a piston to intermittently move upwards and downwards, a ventilation cavity intermittently extracts air and discharges the air, and then a garbage bag is laid by being attached to the inner wall of the inner barrel, so that no wrinkles are formed, the garbage throwing space is increased, the speed of laying the garbage bag is accelerated, and the difficulty of laying the garbage bag is reduced.

The invention discloses a supporting system special for outdoor floors. The supporting system comprises struts, keels and keel covers; the struts are vertically arranged on the ground; the keels are horizontally supported at the upper ends of the struts; and the keel covers are arranged the two ends of the keels and used for connecting the different keels. Each strut comprises a base, a supporting platform and joggling pieces. Each keel is a hollow long-strip-shaped rod, two of side surfaces of each keel are provided with clamping grooves, and hooks can be buckles with the clamping grooves. One end of each keel cover is a keel port connection part for being engaged with the end of the corresponding keel, and the other end of the keel cover is a keel clamping connection part for being connected with the corresponding clamping groove of the keel. The invention further discloses an outdoor floor paving method. By adopting the supporting system special for the outdoor floors and the outdoor floor paving method, the distance between each base and the corresponding supporting platform can be quickly adjusted so that the required supporting height can be obtained; and the joggling pieces can horizontally rotate relative to the supporting platforms, keel clamping can be facilitated, the paving difficulty is lowered, and the paving speed is increased.

The invention discloses a soil thermal desorption treatment system used for treatment of pollutants in soil of a site. The soil thermal desorption treatment system comprises a heap-shaped mound formedby the soil piled up on the site, a thermal desorption treatment assembly embedded in the mound and a sealing layer covering the surface of the mound; the thermal desorption treatment assembly comprises a heating pipe and an extracting pipe which are respectively used for heating the mound and discharging the pollutants desorbed at high temperature. The soil is piled up to form the mould directly, the heating pipe and the extracting pipe are arranged in the mould to have the soil heated and the pollutants in the soil discharged, arrangement of a thermal desorption treatment space of a staticpressure chamber and the like which are excavated in the site is not needed, and workload in thermal desorption treatment is reduced.

The invention discloses a wire cable which comprises an optical cable, a power wire, a tearing rope and a first protective sleeve. The power wire and the tearing rope are located outside the optical cable, and the first protective sleeve is located on the outmost side and wraps the power wire and the tearing rope. Due to the adoption of an optical-electric mixing cable structure, the number of wiring cables can be greatly reduced, and therefore the wiring process can be simplified, laying cost is lowered, laying difficulty is reduced, and meanwhile operation cost is saved to a large extent.

The invention provides a lifting supporting type elevator shaft formwork device. A bottom supporting start device comprises a rectangular bottom plate, a rectangular barrel, a hydraulic station, a control box and a positioning supporting assembly. An elevator shaft formwork assembly is provided with a rectangular platform plate, vertical folding plates, a rectangular connecting plate, a rectangular connecting frame, a cross-shaped supporting frame and a lifting hook. Multiple horizontally-arranged hydraulic cylinders are further arranged. The execution ends of the hydraulic cylinders are vertically hinged to a rectangular downhole formwork formed by two front and rear first planar formworks, two left and right second planar formworks and four right-angle formworks. Through the combinationof the bottom supporting start device and the elevator shaft formwork assembly, the formworks in an elevator shaft are conveniently laid, a protective platform is formed in the elevator shaft, throughlifting of a tower crane, the above elevator shaft continues to be supported through inserted connection of the positioning supporting assembly and a drum body for facilitating formwork erecting, andthe technical problems that formwork erecting in an existing elevator shaft is inconvenient and not safe, and the formworks are prone to deform during formwork removal are solved.

The invention discloses a reinforcing type ecological slope protection structure and a construction method thereof. The reinforcing type ecological slope protection structure comprises a foundation soil layer, an earthwork standard room, a three-dimensional plant net and a vegetation layer. Fixing rods are fixedly distributed on the foundation soil layer. The upper ends of the fixing rods are located into rotation positions of the earthwork standard room in a penetrating manner. The three-dimensional plant net is fixedly located to the upper ends of the fixing rods in an inserted manner through one ends of U-shaped ground anchors. The reinforcing type ecological slope protection structure and the construction method thereof have the beneficial effects that by means of fixation of the fixing rods, the earthwork standard room and the three-dimensional plant net can be fixedly located at the same time; the earthwork standard room and the three-dimensional plant net are fixed without extralocating parts; laying difficult is lowered; and structural stability of the whole slope protection structure is improved.

The invention discloses an enterprise production safety management voice broadcast system which comprises a cloud server, a router and a network loudspeaker box. The cloud server is used for generating digital voice information according to a voice broadcast instruction of a user. The router is used for receiving the digital voice information and retransmitting the digital voice information. The network loudspeaker box is used for receiving the digital voice information retransmitted by the router and broadcasting the digital voice information. The enterprise production safety management voice broadcast system has the advantages that all managers of various enterprises can log into the cloud server and send the voice broadcast instruction to the cloud server, thus, the enterprises only need to arrange servers of broadcast systems of the enterprises on a cloud side, and therefore a large amount of equipment cost can be saved; meanwhile, a voice synthesis module is arranged on the cloud server, the user only needs to send prompt content to the cloud server in a character form, then, the voice synthesis module can generate corresponding digital voice information, and the situation that a large number of devices such as a microphone and a recording device need to be arranged in the prior art is avoided.

The invention relates to an annular monorail mobile laser coal inventory device for a closed coal yard. The annular monorail mobile laser coal inventory device belongs to the field of mechanical equipment. The annular monorail mobile laser coal inventory device is composed of an annular rail, a driving positioning device, a coal inventory device and a driving control system. The annular monorail mobile laser coal inventory device for the closed coal yard adopts the annular monorail, can lay the annular monorail in a segmented manner according to the actual size and the scanning range of the closed coal yard, realizes coal yard full-coverage scanning coal inventory, and improves the universality of the coal inventory device; a transmission gear on a closed-loop motor shaft provided with a stroke encoder is meshed with a transmission rack, so that a driving force can be provided for the coal coiling device and can be used for automatic feedback positioning of the coal inventory device, thereby greatly simplifies the difficulty of the control system; and by adopting a mode of combining a load-carrying bearing with a guide wheel for load-carrying and positioning, effective meshing of the gear and the rack can be ensured, so that the positioning precision of the coal inventory device can be improved, thereby being capable of effectively improving the precision of scanned data, and achieving the purpose of precise coal inventory.

A Large-section, high drop high-voltage cable line high point jointless continuous laying method is provided. A cable tray is arranged on the side with small drop difference of ji shape, a multi-functional guide sliding frame and a first conveyor are arranged on the pay-off side of the cable tray, a tractor is arranged on the side with large drop difference of ji shape, and low-friction pulleys and a plurality of conveyors are arranged on the cable culvert trench, the digging-free tubing, the narrow well, the cable bridge, the caisson with high drop difference, and the tunnel; The laying direction of the cable is from culvert - tubing - working well - slope culvert - bridge - slope culvert - caisson - tunnel. As that cable culvert, The safe and economical laying of high-voltage cable lines without joints at high drop points is realized through the development and application of non-excavated tubes, narrow shafts, cable bridges, high drop caisson, ji shaped high drop model composed oftunnels, non-excavated tubes, high drop caisson traction engineering model calculation and low friction pulley to reduce traction force.

The invention provides a thermoplastic prepreg and a preparation method thereof. The prepreg comprises continuous reinforcing fiber, thermosetting resin and thermoplastic resins, and is divided into four layers comprising a fiber layer, a thermosetting resin layer, a thermoplastic resin layer and a liner paper layer. The thermosetting resin layer is added in the thermoplastic prepreg to improve the bendability and conformability of the material, and is convenient for the overlay between layers of nearly-right-angle and high-curvature complex structural members, and the technical threshold foruse of the thermoplastic prepreg is reduced. The preparation method does not use a heat melting step, avoids the overheating and oxidation of resin, and provides a new solution for maintaining the stability of the thermoplastic prepreg.

The invention discloses a limestone pulping and long-distance conveying device and a using method thereof. The limestone pulping and long-distance conveying device comprises a water supplementing pipe, wherein an inlet of the water supplementing pipe is provided with a fifth valve, an outlet of the water supplementing pipe is communicated with the top of a pulp box, the inlet of the water supplementing pipe and a long-distance conveying pipe are communicated, the long-distance conveying pipe is close to a second valve and is arranged at the back of the second valve, an inlet of a pulp backflow pipe is communicated with another long-distance conveying pipe between a pulp pump and the second valve, and a water feeding pipe is communicated with another long-distance conveying pipe which is close to a third valve and arranged at the front of the third valve. The using method of the limestone pulping and long-distance conveying device comprises a water supplementing pulping step, a pulp conveying step and a back flushing step. The limestone pulping and long-distance conveying device and the using method thereof, disclosed by the invention, have the advantages of largely shortening the length of the pulp backflow pipe, reducing the lift of the pulp pump and the pavement difficulty of a device, saving construction and operation costs, being capable of quickly preparing limestone pulp and improving production efficiency.

The invention relates to a wave power generation ship. The wave power generation ship comprises an outer shell, an inner shell and a top plate, a roller friction power generation assembly, a roller electromagnetic induction power generation assembly, a separate friction power generation assembly and a direction adjusting mechanism, wherein the roller friction power generation assembly is arrangedat the bottom of the inner shell, the roller electromagnetic induction power generation assembly is arranged on the middle portion of the inner shell, and the separate friction power generation assembly and the direction adjusting mechanism are arranged between the outer shell and the inner shell. The wave power generation ship has multiple power generation modes.

The invention discloses a satellite-borne deployable parabolic cylinder antenna. The antenna comprises a reflecting surface module, an unfolding arm module and a folding wrapping tape, wherein the reflecting surface module is formed by arranging a plurality of fixed network reflecting surface units in an array manner; the fixed network reflecting surface unit comprises a supporting frame and a metal wire network reflecting surface; one dimension of the supporting frame is a linear dimension; the other dimension is a parabola dimension; the metal wire network reflecting surface is laid in the middle of the supporting frame; the plurality of fixed network reflecting surface units arranged along the parabola dimension are sequentially and rotationally connected; when the parabolic cylinder antenna is in an unfolded state, the plurality of fixed network reflecting surface units arranged along the parabola dimension form a parabolic cylindrical surface; when the parabolic cylinder antenna is in a folded state, the plurality of fixed network reflecting surface units arranged along the parabola dimension is folded in a folding fan mode. The reflecting surface units adopt a fixed network combined frame type design, the advantages of a fixed-surface deployable antenna and a network-surface deployable antenna are integrated, and the lightweight requirement of the antenna is met on the basis of realizing a high-shape-surface-precision reflecting surface.

The invention relates to an integrated floor heating plate with high heat transfer efficiency, comprising an insulating bottom plate and a heat transfer top plate. The upper surface of the insulating bottom plate is formed with transverse grooves and longitudinal grooves, and the transverse grooves and the longitudinal grooves intersect vertically to form a unit cell. The upper surface of the hot bottom plate is also provided with arc-shaped grooves, two arc-shaped grooves are arranged in a group, and the opening directions are opposite and symmetrically arranged in the cell. The midpoint of the groove is tangent to the transverse groove, and the lower surface of the heat transfer top plate is provided with transverse grooves, longitudinal grooves and arc grooves that match the layout of the heat insulation base plate; the cells of the heat insulation base plate are provided with The positioning groove is provided on the lower surface of the heat transfer top plate with a matching positioning protrusion; the end surface of the heat insulation bottom plate is provided with a splicing body and a splicing groove. Thermal insulation performance and top layer heat dissipation performance, while the overall product is light and strong, and can regulate the density of hot water coil laying.

The invention discloses a corrugated curved-edge natural simulation facing tile manufacturing die which comprises a bottom die core, a face die core and die cavity side plates. The die is characterized in that (1) design of a natural simulation face is achieved by applying natural building decoration materials to tiles, and stone, bamboos, flowers, grass, animals and all natural shapes are transferred to the surfaces of the tiles; (2) to meet requirements for completeness and shape features of patters on the surfaces of the tiles and continuity of the patterns formed after the tiles are stuck, a corrugated curved-edge shape is designed; (3) due to the design of the corrugated curved-edge shape, tiling can be conveniently carried out, sticking difficulty is reduced, work efficiency is improved, and the wall tiles are firm and can be prevented from falling due to staggered meshing of corrugated edges; (4) to overcome the defects that cracking and deformation occur in the pressing and firing processes of tile bodies due to imbalanced stress of the tile bodies, bottom die pressurizing and depressurizing areas are designed, and particularly, and the depressurizing degree and the pressurizing degree respectively range from -30% to 30%; (5) to meet requirements of die releasing in the pressing process of the tile bodies and requirements of production process, a side plate stair face is arranged; (6) to meet requirements of pressure borne by the die cavity side plates in the pressing process of the brick bodies and for wear resistance, special alloy materials are used.

The invention provides a method for manufacturing river channel dry land construction conditions by using a flow self-adjusting siphoning type construction flow guide pipe, which comprises the following steps of: marking a river channel area of the river channel dry land construction conditions to be manufactured as a construction drying area which is positioned at the downstream of a water retaining building of a river channel; determining a water return area at the downstream of the construction drying area, wherein the water return area is adjacent to the construction drying area; installing a siphoning type construction flow guide pipe used for conveying water on the upstream of the water retaining building to the downstream of the water return area at the water retaining building; andcreating a vacuum condition for the siphoning type construction flow guide pipe so that water in front of the water retaining building can be conveyed to the downstream of the water return area through the siphoning type construction flow guide pipe, and when water in the target area flows out of the target area, forming a riverway dry land construction condition in the construction drying area.The method can significantly reduce the engineering investment, simplify the manufacturing operation of river dry land construction conditions, avoid the hidden danger of flood discharge, and also has the characteristic of being more environmentally friendly.

The invention discloses a high-sensitivity wide-range stress-strain sensing optical cable for structure safety monitoring, and a monitoring method of the optical cable. The optical cable comprises an outer protection layer, a reinforcing member, a half-tight sleeve sensing unit and a loose sleeve sensing unit, wherein the reinforcing member adopts a twisted structure; and the reinforcing member, the half-tight sleeve sensing unit and the loose sleeve sensing unit are placed in parallel. According to the optical cable, the testing sensitivity of the half-tight sleeve sensing unit is improved by the reinforcing member in the twisted structure, and a range scope of the stress-strain sensing optical cable is expanded by regulating excessive length of the loose sleeve sensing unit and a testing scope of the half-tight sleeve sensing unit. The optical cable can be applied to various measuring occasions, has an extremely large measuring range and takes the measuring sensitivity into consideration, categories of the sensing optical cable are reduced, the cost is saved, and the laying difficulty is reduced.

The invention belongs to the technical field of composite material integral forming, and relates to a laying method of a full-height foam sandwich wing surface laying layer. The technical scheme is characterized in that when a full-height foam sandwich wing surface is laid by adopting upper and lower mold closing tools, the skin of the wing surface is divided into an upper part and a lower part, and a framework is divided into an upper part, a middle part and a lower part; and when a framework part laying layer is laid, a foam sandwich is used as a forming tool of the framework to assist layerlaying. The method comprises the steps that laying of a lower skin mold attaching laying layer group is completed on the lower mold closing tool, laying of a framework laying layer group is completedon the foam sandwich, and the framework laying layer group is of a beam type structure; an upper skin lap joint laying layer group is laid on the upper surface of the foam sandwich and the upper surface of the framework laying layer group; and the upper mold closing tool is in butt joint with the lower mold closing tool to finish tool mold closing, and the whole laying process of the laying layers is completed. According to the method, the number of forming tools is greatly reduced, the manufacturing cost is reduced, the laying process of the laying layers is optimized, the laying difficultyof the laying layers is greatly reduced, and the production efficiency is improved.

The invention provides an optimal rib board with horse stool supports. The optimal rib board with the horse stool supports comprises a plurality of cold bending ribs, at least one bottom board, a plurality of connecting pieces and a plurality of the horse stool supports. The cold bending ribs are fixed on the bottom board through the connecting pieces, a plurality of punched holes are formed in webs of the cold bending ribs, the horse stool supports are matched with the punched holes, one ends of the horse stool supports are fixed to the edges of the punched holes, the other ends of the horsestool supports extend out of the upper ends of the cold bending ribs, one ends, extending out of the cold bending ribs, of the horse stool supports form punching grooves, and the horse stool supportson the different cold bending ribs are correspondingly arranged to form installing straight lines perpendicular to the width direction of the bottom board. The optimal rib board has good integrity andcontinuity and is light in weight, and on-site rib laying and board laying are convenient; and floor slab ribs are erected by the horse stool supports so that various floor slabs with different thicknesses can be adapted to.

The invention belongs to the technical field of soft rock tunnel supporting, and particularly relates to a pre-empty soft rock tunnel supporting structure and a construction method thereof. The pre-empty soft rock tunnel supporting structure comprises a tunnel, a connecting plate and a steel arch are arranged on the inner surface of the tunnel, a reinforcing groove is formed below the tunnel, a base angle pressure relief groove is formed in a base angle, and the bottom end of the steel arch and the two ends of a V-shaped frame are arranged in the base angle pressure relief groove; and the middle end of the V-shaped frame is arranged in the reinforcing groove, a pre-stressed anchor rod and an anchor cable are fixedly installed in a grouting layer arranged on the surrounding rock face of the tunnel, a concrete sealing layer is sprayed on the inner side of a steel wire rope net hung to the pre-stressed anchor rod and the anchor cable, and a clamping plate clamped with the connecting plate is connected with a cover plate through a connecting bolt. A gas and water pipeline system and a power cable system are installed between the cover plate and the connecting plate. According to the pre-empty soft rock tunnel supporting structure and the construction method thereof, the approximately triangular supporting face composed of the steel arch and the V-shaped frame is good in stress balance and high in supporting force on surrounding rock, the connecting plate and the cover plate opened through a special tool can safely and effectively utilize the base angle space of the steel arch, and the laying difficulty of pipelines and power cables is lowered.

The invention discloses a heavy self-turning electric rail flat car which comprises a frame, a loading wheel set, a rear loading wheel set and a driving mechanism. The frame is a rectangular frame formed by welding profile steel, the rear end of the frame is provided with a vehicle-mounted control box, a wireless signal receiving device is installed in the vehicle-mounted control box, the load wheel set is composed of four load steel wheels installed in wheel boxes, and an independent slewing bearing is installed above each wheel box and connected with the frame. The two loading wheels mounted at the front end of the frame are driving wheels, the two rear loading wheels are driven wheels, each driving wheel is provided with a group of independently suspended driving structures, and each group of driving mechanisms is electrically connected with the vehicle-mounted control box; and a driving wheel box is provided with a front low-voltage electric brush, and a driven wheel box is provided with a rear low-voltage electric brush. By means of the mode, automatic and flexible turning of the heavy flat car can be achieved, rail construction cost and maintenance pressure are reduced, and the application range of the flat car is widened.

The invention relates to a construction device for anti-corrosion cloth of a pipeline and an anti-corrosion construction method. The construction device comprises a baseplate, moving devices, a rotating device and a bearing bracket, wherein the moving devices are symmetrically mounted on the front side and the rear side of the baseplate; the rotating device is connected between the moving devices;the bearing bracket is arranged at the right end of the rotating device and mounted on the baseplate; each moving device comprises a connecting mechanism and a driving mechanism; the rotating devicecomprises a fixing mechanism and a rotating mechanism; and each driving mechanism comprises a transverse plate, a movable trough plate, a supporting bracket, a rotating rack, a convex pillar, a driving motor and a working plate. The problems of high labor cost, high labor intensity, low working efficiency, nonuniform laying and the like in a conventional pipeline anti-corrosion cloth laying process are solved. Laying of the anti-corrosion cloth of the pipeline can be helped. The construction device has the advantages of low labor cost, low labor intensity, high working efficiency, uniform laying and the like.

The invention discloses a method and a device for positioning, mounting and construction of a manhole cover. The method comprises the following steps: paving a road after covering the mouth of a sewer by utilizing a positioning plate; removing part of the road above the positioning plate in a milling manner after positioning the positioning plate; and constructing and mounting the manhole cover after transferring the removed part of the road. The device comprises the positioning plate, a magnet and a miller, wherein a positioning point is set on the positioning plate; a strip groove is formed in the center of the positioning plate; the miller comprises a matrix; the matrix comprises a connector, cutting plates and a positioning rod; and a transverse rod is arranged at the bottom of the positioning rod. The method provided by the invention has the advantages that the procedure is simple, the construction speed is high, the sealing performance is good after the manhole cover is mounted, the position of the manhole cover is table, the damage caused by non-uniform load bearing is avoided, and the service life of the manhole cover is effectively prolonged. The device provided by the invention has the advantages that the structural composition is simple, the operation is convenient, the manhole cover construction and mounting procedure can be greatly simplified, and the service life of the manhole cover after construction and mounting is effectively prolonged.

The invention provides an intelligent parking lot based on a shunt drive type self-control power supply circuit. The intelligent parking lot comprises a parking lot body with a plurality of parking spaces, an entrance barrier gate arranged at an entrance of the parking lot body, an exit barrier gate arranged at an exit of the parking lot body, a control room adjacent to the exit barrier gate, a controller arranged in the control room and connected with the entrance barrier gate and the exit barrier gate, a multifunctional display screen connected with the controller, and a license plate camera connected with the controller and used for taking pictures of license plates. A power supply input end of the controller is provided with a self-control power supply circuit which is provided with a shunt drive circuit used for driving the license plate camera. The intelligent parking lot based on a shunt drive type self-control power supply circuit has the advantages that equipment operation is better protected, the service life of equipment is prolonged, the using effect of the equipment is improved, and the using cost is reduced.