67results about How to "Fixed way is flexible" patented technology

The invention provides a novel vertical flexible covering film anaerobic fermentation device, comprising an anaerobic fermentation reactor and a flexible covering film fixed to the anaerobic fermentation reactor, wherein the anaerobic fermentation reactor is provided with, from bottom to top, a methane stirring device, a multipoint self-rotating water distributing device and a four-phase separator. The device is a novel vertical flexible covering film anaerobic fermentation device having the characteristics of: being low constant pressure and anaerobic, high-efficiency production of methane, long sludge age, low energy consumption and convenient operation and maintenance.

The invention relates to a magnetic suspension wind driven generator, and technically aims to provide the magnetic suspension wind driven generator, which can be used for normally generating power, has high wind power conversion efficiency, and is easy to disassemble and replace under the condition of low wind speed. The magnetic suspension wind driven generator comprises a fixed support, wherein a support magnet is arranged on the fixed support; a support shaft is arranged in the support magnet; a rotating wind wheel is arranged on the periphery of the support shaft and is provided with wind wheel blades; a wind wheel magnet opposite to the support magnet is arranged under the wind wheel, and the wind wheel magnet and the support magnet have the same magnetic pole; and a disk generator is arranged between the wind wheel and the supporting shaft. According to the magnetic suspension wind driven generator, the conversion efficiency of wind energy is improved by more than 50 percent, and the power generation cost of the wind driven generator can be greatly reduced. The magnetic suspension wind driven generator is applicable to a wind power generation field.

The invention discloses a mining emergency rescue communication method based on a Mesh network technology. The mining emergency rescue communication method is characterized by comprising the following steps: using Mesh routers as a base to constitute a communication network; networking the Mesh routers according to a Mesh protocol to dynamically and automatically establish network-like wireless links; transmitting data according to the distances of the Mesh routers; if the nearest Mesh router is jammed, according to the flow of each of the Mesh routers, selecting the Mesh router with the lowest flow to transmit a data packet; connecting the Mesh routers with mining intrinsic safety type cameras to acquire video image information and with mining mobile terminals to perform voice communication. The mining emergency rescue communication method disclosed by the invention is flexible and convenient for network construction, so as to greatly reduce the network infrastructure cost.

The invention discloses a multifunctional radiotherapy body position fixing frame, which is characterized in that it includes a main board one and a main board two, and a folding hinge switch is arranged between the main board one and the main board two; a scale scale is fixed on the edge of the main board one; The surface of the main board is provided with a number of small circular holes; the upper part of the main board one is provided with a head hole, and the head hole is provided with a head hole plug; the upper part of the front of the main board one is also provided with a headrest; Mammary gland hole, there is a breast hole plug in the mammary gland hole; a scale scale is fixed on the front of the main board, the scale scale is located between the head hole and the mammary gland hole, and there are semicircular grooves for arms on both sides of the scale scale; the front side of the main board A wedge-shaped pad is provided on both sides of the middle part of the board; a solid cylindrical support is provided on the back of the main board. Compared with the prior art, the present invention provides a flexible fixation method for prone and supine radiotherapy for patients with tumors in the head, neck, shoulder, chest and abdomen, saves economic costs and improves the curative effect of radiotherapy for patients.

The invention discloses an electromagnetic shielding structure for quick pressed cables. The electromagnetic shielding structure comprises a lower pressing plate and an upper pressing plate. The lower pressing plate is arranged on a housing mounting seat of a motor controller. The lower pressing plate is provided with a plurality of junction blocks which are separately arranged in the length direction and are in one-to-one correspondence with wire inlet holes of the housing of the motor controller. Each junction block is provided with a wiring groove which is used for embedding a metal shielding layer of the cable. The upper pressing plate detachably presses the lower pressing plate and compresses the metal shielding layer of the cable which is arranged in each wiring groove of the lower pressing plate. The electromagnetic shielding structure has beneficial effects of quickly pressing and fixing one or a plurality of cables on the housing of the motor controller, ensuring electromagnetic compatibility, greatly reducing cost of a connector, and preventing metal shielding layer damage in detachment of the cables for maintenance.

The invention discloses a magnetic type cardiopulmonary resuscitation instrument. The cardiopulmonary resuscitation instrument comprises a shell, a shell fixing part, a negative pressure sucker, a permanent magnet, an electric magnet and a control part, wherein the shell fixing part is connected with the lower part of the shell, and is used for fixing the body of a to-be-rescued patient on the shell; the electric magnet is fixedly connected in the shell; the permanent magnet is positioned under the electric magnet; the negative pressure sucker is connected with the lower side of the permanent magnet; or the permanent magnet is fixedly connected in the shell, the electric magnet is positioned under the permanent magnet, and the negative pressure sucker is connected with the lower side of the electric magnet; the control part is arranged on the shell and is connected with the electric magnet, and can be used for controlling the electric magnet to generate an alternating magnetic pole; the negative pressure sucker is arranged in the shell, and can be driven by the alternating magnetic pole to move in the shell up and down. The magnetic type cardiopulmonary resuscitation instrument can be used for supplying pressing and pulling force to the whole cardiopulmonary resuscitation instrument with controllable force by adopting the principle of homopolar repulsion and heteropolar attraction of magnet to avoid manual operation and improve the automatic degree of the instrument, so that the survival rate of patients with sudden cardiac arrest can be greatly improved. The magnetic type cardiopulmonary resuscitation instrument is suitable for popularization and application.

The invention discloses a steel rail test block which is characterized in that one or several of damages in a bolt hole kerf for stimulating bolt hole cracks, a rail waist cross hole for stimulating rail waist part defects, a rail head cross hole for stimulating rail head part defects and a rail bottom kerf for stimulating rail bottom part cracks are arranged on a steel rail to form the steel rail test block. The steel rail test block has the benefits that a steel rail damage sample basically consistent with a dedicated line can be dynamically provided for steel rail flaw detection operation; through various steel rail damages for stimulating ultrasonic non-destructive testing, the requirements for steel rail flaw detection actual situations are satisfied in all directions.

The invention discloses a dynamic test device for rail flaw detection. The dynamic test device comprises a supporting frame, a sliding platform, a rail test block and an auxiliary device, wherein the supporting frame is used for carrying a flaw detection device; the flaw detection device is arranged at the upper part of the supporting frame; the sliding platform is movably arranged at the bottom of the supporting frame in the length direction of the supporting frame, and is located under the flaw detection device; the rail test block is arranged on the sliding platform, is located under the flaw detection device, can move opposite to the flaw detection device in the length direction of the supporting frame under the driving of the sliding platform, and is used for providing various damage simulations of a rail; the auxiliary device comprises a coupling water spraying device that provides coupling water for a contact surface between the rail test block and a detection wheel of the flaw detection device. According to the invention, the dynamic test device for rail flaw detection can dynamically provide an all-around damage test environment for the rail flaw detection work, and is simple to operate, flexible in arrangement, small in environmental impact, and strong in adaptability.

The invention discloses an access control system for a construction site. The access control system comprises a column and retaining plates symmetrically disposed on two sides of the column. The middle of the column is provided with an activity chamber; a motor is mounted inside the column; the output end of the motor is connected with a rotating shaft; the rotating shaft can freely rotate in the activity chamber; two sides of the column are further provided with rectangular holes communicated with the activity chamber; the rotating shaft is sleeved with two fences; the fences penetrate the rectangular holes to close gaps between the column and the retaining plates; a drive block is fixed on the rotating shaft; the system further comprises a first swiping area and a second swiping area arranged on the outer wall of the column; the first swiping area and the second swiping area are connected with the motor through a controller. The system is simple in structure, flexible to fix and quick to install and uninstall; after one construction site completes construction, the system can be uninstalled and used in another construction site; reusability of the system is improved, and engineering management costs are decreased.

The invention belongs to the field of fiber optic micro cables of underwater robots, and particularly relates to a switching device and a switching method for a fiber optic micro cable of an underwater robot. The switching device comprises cone dies and a main cavity die, wherein the cone dies are arranged at two ends of the main cavity die respectively; a main fiber optic micro cable is switched with another section of fiber optic micro cable through a fiber optic switching terminal; the main fiber optic micro cable and a tail optical fiber which are fused are accommodated in the main cavity die and the cone die; and sealants are respectively filled between the main fiber optic micro cable and the tail optical fiber as well as between the main cavity die and the cone dies. The switching method comprises the following steps: carrying out fusion treatment on the main fiber optic micro cable led from an airtight cabin or fiber optic receiving / transmitting device and the tail optical fiber containing the fiber optic switching terminal by a fiber optic melting machine so as to realize the fusion of fiber cores of two sections of optical fibers; under the assistance of the die, filling the sealants between the main fiber optic micro cable and the tail optical fiber; fusing the fiber cores as well as wrapping and sealing the edges of the fiber optic micro cable and the tail optical fiber; and standing the sealed article in air for half an hour and fusing to form a whole. The switching device and the switching method disclosed by the invention have the advantages of flexibility in splitting, reliability in sealing, simpleness in operation and the like.

The invention discloses a small animal fixation rack used for a biology laboratory and a fixation method adopted by the small animal fixation rack, belonging to the field of auxiliary instruments for the bioexperiments. The fixation rack comprises a fixation board, wherein a plurality of regulation holes are uniformly formed in the middle of the surface of the fixation board, and latch-type tying belts or nylon Velcro fasteners are placed in the regulation holes in a penetrating manner; and support legs are arranged at four corners of the bottom surface of the fixation board. The fixation method comprises the following steps: step 1, placing an anaesthetized small laboratory animal on the fixation board with the plurality of regulation holes, and spreading out the four limbs of the small animal; step 2, binding for fixing the four limbs of the small animal by adopting the latch-type tying belts or nylon Velcro fasteners; step 3, dissecting the small animal, tearing the epidermis apart left and right, and fixing the epidermis through the matched stretching of spring clips and rubber bands; and step 4, adjusting the position of an illuminating lamp, irradiating the internal organs, and observing and recording the experimental data. The fixation mode is flexible and is suitable for most in vivo experiments, the experiment efficiency is enhanced, and resources are saved.

The invention discloses a dynamic test method for rail flaw detection. The dynamic test method comprises the following steps: a flaw detection device is arranged at the upper part of a supporting frame; a sliding platform is movably arranged at the bottom of the supporting frame in the length direction, wherein the sliding platform is located under the flaw detection device; a rail test block is arranged on the sliding platform, wherein the rail test block is located under the flaw detection device, can move opposite to the flaw detection device in the length direction of the supporting frame under the driving of the sliding platform, and is used for providing various damage simulations of a rail; an auxiliary device is arranged on the supporting frame, wherein the auxiliary device further comprises a coupling water spraying device that provides coupling water for a contact surface between the rail test block and a detection wheel of the flaw detection device. According to the invention, the dynamic test method for rail flaw detection can dynamically provide an all-around damage test environment for the rail flaw detection work, and is simple to operate, flexible in arrangement, small in environmental impact, and strong in adaptability.

The invention relates to a fire water monitor with an adjustable range. The fire water monitor with the adjustable range comprises a gun body, a supporting seat for supporting the gun body, handrailsand a gun barrel, wherein the handrails and a gun barrel are fixedly arranged on the gun body, wherein the gun body is in spherical hinge connection with the supporting seat; the gun barrel comprisesa plurality of adjusting pipes which are rotatably connected; and a plurality of water blocking stopping-blocks which are arranged at intervals are arranged in the circumferential direction of the inner walls of the adjusting pipes. Due to the arrangement of the adjusting pipes, when the adjusting pipes are relatively rotated, the water blocking stopping-blocks of different adjusting pipes can bestaggered with one another, so that the function of adjusting the cross-sectional area of water flowing of the gun barrel is achieved. When the water yield of a fire fighting truck is a certain value,the water flowing area of the gun barrel changes, so that the change of the water flow speed of a water column sprayed from the gun barrel is achieved, and the purpose of adjusting the water sprayingdistance of the fire water monitor in the water spraying process of the fire water monitor is achieved.

The invention discloses an independent rear suspension of a pure electric four-wheel drive passenger car. The independent rear suspension is arranged on a passenger car frame, and comprises a left suspension unit and a right suspension unit, each suspension unit comprises an airbag bearing mechanism, a suspension fixing mechanism, a shock absorption and buffer mechanism, a wheel hub mechanism, a mounting block and a positioning mechanism, wherein one end of the suspension fixing mechanism is arranged on the passenger car frame, the other end of the suspension fixing mechanism is rotationally connected with the mounting block, one end of the shock absorption and buffer mechanism is hinged to the suspension fixing mechanism, and the other end of the shock absorption and buffer mechanism is fixed to the suspension fixing mechanism. The independent rear suspension of the pure electric four-wheel drive passenger car has the advantages that the structure is compact, the fixing mode is flexible, the independent rear suspension and a drive motor can be integrated in the car frame conveniently, and the lightweight of the whole car is achieved more easily.

The invention discloses a multi-nozzle alcohol-based burner. The device comprises an air duct outer pipe and a multi-sage fuel supply unit, wherein multi-stage air duct pipes are coaxially arranged inside the air duct outer pipe in sequence; the air duct pipe located at the most center is a first-stage air duct pipe; the outside of the first-stage air duct pipe is sleeved with a second-stage air duct pipe; an ignition device, an air duct cyclone and an annular air distributor are arranged at the inlet of the first-stage air duct pipe; a central nozzle is arranged in the inner ring of the air duct cyclone; and the central nozzle is connected with a central branch pipe; the fuel supply units respectively communicate with a plurality of annular branch pipes; and the plurality of annular branch pipes are parallel to the center line of the multi-stage air duct pipes and are circumferentially arranged around the outer side of the second-stage air duct pipe. According to the multi-stage zonedcombustion technology, a rich combustion zone and a quenching zone are formed in the first-stage air duct pipe, and a lean combustion zone is formed at the outlet of the first-stage air duct pipe, sothat atomized liquid and combustion air are fully mixed; combustion is complete, and nitrogen oxide emission is reduced; and variable load regulation of the burner is achieved using the multi-stage fuel supply unit.

The invention relates to the technology field of medical-test auxiliary devices, in particular to an animal-operation fixing device. The animal-operation fixing device comprises an operating table, fixators and a connecting piece; the operating table is used for placing an animal, the multiple fixators are placed on the operating table, and are connected with the operating table through magnetic force, one end of the connecting piece is connected with the fixators, and the other end of the connecting piece is used for being connected with the body of the animal. According to the animal-operation fixing device, connection between the fixators and the operating table is set as magnetic force connection, the positions of the fixators can be randomly adjusted on the operating table to adapt toanimals of different body sizes, and the using range is wide.

The present invention relates to a fuse mounting structure comprising a fuse assembly, a fuse base and a wire harness terminal. The wire harness terminal is fixed to the fuse base. When the fuse assembly is inserted into the fuse base, the wiring harness terminal is inserted into the fuse assembly. According to the technical scheme of the invention, through the spacing structure design of a left pin part and a right pin part, a short circuit failure is avoided and the protection is improved, through the four cavity structures with vertical and horizontal baffle plates in a base shell, after a fuse is installed, the internal space is separated, even water and other liquids enter the base, the safety can be ensured, the possibility of short circuit is little, the fuse base and an electrical box are overall separated structures, the cost of a single base is low, and the fuse mounting structure has the advantages of convenience in use, small occupation space and flexible fixation mode.

The invention discloses a sightseeing elevator handrail which is used for being mounted on a car wall of a sightseeing elevator. The car wall comprises a car wall plate, side walls connected to the two sides of the car wall plate and a lower end wall connected to the lower portion of the car wall plate. The sightseeing elevator handrail comprises a cross handrail body and side supporting legs fixed to the cross handrail body. The side supporting legs are fixed to the side walls. Vertical handrail bodies are further included, one end of each vertical handrail body is fixedly connected to the cross handrail body, lower supporting legs are arranged at the other ends of the vertical handrail bodies, and the lower supporting legs are fixedly connected to the side walls or the lower end wall. According to the sightseeing elevator handrail, it can be guaranteed that the cross handrail body has good stability for a long time, and safety and reliability are achieved.

The invention discloses a shower head. The shower head comprises a spraying nozzle, a hose and a fixing column, wherein the fixing column is made of stainless steel and is in a hollow structure; each of the two ends of the fixing column is connected with a suction disc; the fixing column is adsorbed on the wall surface through the suction discs to be fixed; one end of the hose is connected with the spraying nozzle, and the other end of the hose is connected with an outlet of a water pipe; the back of the spraying nozzle is provided with a fixing block; the fixing block comprises a magnet and a stainless steel layer which wraps the magnet; the spraying nozzle is adsorbed on the surface of the fixing column through the fixing block and is connected with the fixing column in a sliding way; the back of the spraying nozzle is further provided with a protecting chain; one end of the protecting chain is connected with the spraying nozzle, and the other end of the protecting chain is connected with the fixing column. Therefore, the shower head disclosed by the invention can be fixed flexibly, and is convenient to use, the height and the position of the shower head can be adjusted conveniently, and the spraying nozzle can be well protected.

The invention discloses a front independent suspension for a pure electric four-wheel-drive bus. The front independent suspension for the pure electric four-wheel-drive bus is arranged on a bus frameand comprises a left suspension unit and a right suspension unit; each suspension unit comprises an airbag bearing mechanism, a suspension fixing mechanism, a shock absorbing buffering mechanism, a limiting block, a hub mechanism, a steering mechanism and a mounting block; one end of the suspension fixing mechanism is mounted on the bus frame; the other end of the suspension fixing mechanism is rotationally connected with the mounting block; one end of the shock absorbing buffering mechanism is hinged on the suspension fixing mechanism; the other end of the shock absorbing buffering mechanismis connected with the bus frame; the hub mechanism and the steering mechanism are both fixed on the mounting block; the limiting block is fixed on the suspension fixing mechanism; and the airbag bearing mechanism is fixed on the suspension fixing mechanism. According to the front independent suspension for the pure electric four-wheel-drive bus, the structure is compact, the fixing mode is flexible, the front independent suspension for the pure electric four-wheel-drive bus can be conveniently integrated on the frame together with a fixing device for the driving motor and the steering mechanism, and the lightweight of the vehicle is more easily realized.

The invention discloses an antenna fixing device which comprises a support plate and an antenna bracket, wherein the support plate is in a preset plate shape, the ends of the support plate are fixed to an attachment body, one end of the antenna bracket is fixed with an antenna, and the other end of the antenna bracket is fixed above the support plate through a preset way. In the antenna fixing device, the antenna is fixed with the fixing of the support plate to the attachment body; because the attachment body can be various fixed structures of wall surfaces, the bottoms of outdoor elevated platforms, telegraph poles, side surfaces of pedestrian corridors and the like, a fixing mode of the antenna is more simple and flexible; in addition, the height of the antenna can be freely selected in the fixing process of the antenna without the arrangement of a very long hanging reinforcement; in addition, because the antenna can be hidden by making use of the support plate when being fixed, and the shape and the color of the support plate can be flexibly designed, the purposes that the antenna fixing device is adapted to the surrounding environment and has beautiful apperance are reached; and in addition, compared with the expensive integrated hidden antenna, the antenna fixing device is lower in cost.

The invention is applicable to the field of printing and dyeing machinery, and provides a roller brush for printing and dyeing. The roller brush comprises a grip, wherein a telescopic device is mounted on the grip, connecting plates are mounted on the side portions of the telescopic device, a slider is mounted at the other end of each connecting plate, a control plate is arranged on the side portion of each connecting plate, a sliding groove is formed in each control plate, the sliders are located in the sliding grooves, a top plate is installed at the other ends of the control plates, supporting plates are installed on the side portions of the top plate, buffer clamping mechanisms are installed on the supporting plates, and the roller brush is arranged between the buffer clamping mechanisms. Through the additional arrangement of the buffer clamping mechanisms and the telescopic device, the roller brush is more flexible in fixing mode and convenient to disassemble, and replacement of anew roller brush is convenient; and the telescopic device enables the length of the roller brush to be adjustable, so that the working range of the roller brush is wider.

The invention belongs to the technical field of communicators, and in particular relates to encrypted interphone equipment. The interphone comprises an interphone shell and an antenna inserted into the left side of the top of the interphone shell. The tops of the outer walls of the left side and the right side of the interphone shell are connected with connecting blocks through screws. A clampingplate is integrally formed at one end, far away from the interphone shell, of each connecting block. Springs are uniformly connected between the upper part of one side, close to the interphone shell,of the clamping plates and the interphone shell through screws. A connecting frame is embedded in the upper part of the front side of the interphone shell. Partition plates are evenly and integrally formed on the inner side of the connecting frame. A waterproof filter screen is bonded between every two adjacent partition plates. A volume knob and a frequency modulation knob are inserted into the middle of the front side of the interphone shell. An inserting groove is formed in the lower middle portion of the front side of the interphone shell. The device is more comfortable in holding hand feeling, flexible and diverse in fixing mode, higher in structural strength and not prone to being damaged due to falling.

The invention discloses an intelligent import and export system for a construction site, which includes a column and baffles symmetrically arranged on both sides of the column, a movable cavity is opened in the middle of the column, a motor is installed inside the column, and the output end of the motor is connected to There is a rotating shaft, which can rotate freely in the movable cavity, and there are rectangular holes connected with the movable cavity on both sides of the column, and two fence bodies are set on the rotating shaft, and the fence body runs through the rectangular hole to connect the column and the baffle. The gap is closed, and the drive block is fixedly installed on the rotating shaft; it also includes a first card swiping area and a second card swiping area arranged on the outer wall of the column, and the first card swiping area and the second card swiping area are connected to the motor through the controller. The present invention is simple in structure, and its fixing method is flexible, and it can be installed and disassembled conveniently and quickly. When a construction site is completed, the present invention can be disassembled and used for another construction site to continue to use, improving the reuse rate of the access control system, reducing the Project management costs.

The invention discloses a scaffold which comprises vertical rods (1) and transverse rods (2). Connecting discs (3) are arranged on the vertical rods (1) at equal distance, through holes are evenly formed in each connecting disc (3) along the circumference, opening grooves are formed in the two ends of each transverse rod (2), the upper end of each opening groove is provided with an insertion hole (21), insertion blocks (22) are arranged in the insertion holes (21), and the insertion blocks (22) sequentially penetrate through the insertion holes (21) and the through holes formed in the corresponding positions of the connecting discs (3) from top to bottom and are connected with the lower ends of the opening grooves in an abutting mode; two embedding grooves (23) are vertically and symmetrically formed in each transverse rod (2) in the axial direction, a protective plate (4) is arranged in the embedding grooves (23) in an embedded mode, and reinforcing ribs (41) are arranged on the protective plate (4). According to the scaffold, by adopting flexible connection between the connecting discs and the transverse rods and arranging the protective plate in the embedded mode, the using safety is improved; the structure is simple and practical, disassembly and assembly are convenient and fast, and the application range is wide.

The invention discloses a double-wall corrugated pipe preparation mold wide in application range and a corrugated pipe preparation method. The mold comprises two outer molds, an inner mold arranged between the two outer molds, a positioning mechanism and a locking mechanism, wherein the positioning mechanism and the locking mechanism are arranged on the outer molds, the outer mold is semi-cylindrical, a semi-circular bulge is arranged on the inner wall of the outer mold, the inner mold is cylindrical, a mounting groove is formed in the inner wall of the semi-circular bulge, and positioning holes are formed in the outer wall of the inner mold; the positioning mechanism comprises a fixed block fixedly arranged in the mounting groove and an electromagnet fixedly arranged in the positioning hole; the locking mechanism comprises clamping semicircular rings arranged outside the outer molds in a sleeving mode, lead screws movably arranged on the clamping semicircular rings, first supporting plates movably arranged on the lead screws and driving motors fixedly arranged at one end of the lead screws. The preparation method comprises the four steps of raw material treatment, mold closing, injection molding and demolding. The butt joint of the outer dies is more efficient, the fixing mode is flexible, and meanwhile the applicable die size is wider.

The invention discloses a pipeline route fixing device. The pipeline route fixing device comprises a fixed part and a movable part; the movable part is movably fixed on the fixed part, wherein the fixed part comprises a bottom plate and L-shaped plates; two L-shaped plates are arranged; vertical parts of the two L-shaped plates are symmetrically arranged on the bottom plate; horizontal parts of the two L-shaped plates oppositely extend; a plurality of open grooves are formed in the horizontal parts of the two L-shaped plates in the length direction in a spaced manner; the movable part comprises a base plate and a fastener; the fastener is fixed on the base plate; and first clamping structures which form clamping fit with the open grooves are arranged on the two opposite sides of the base plate. Compared with the prior art, the pipeline route fixing device has the advantages that the mounting position of the movable part on the fixed part can be changed according to the fixing positionsof the first clamping structures in the open grooves by arranging the first clamping structures and the plurality of open grooves matched with the first clamping structures; the fixing mode is flexible; and the universality is stronger.

The invention discloses an application method of a gate structure for an entrance and exit of a building construction site. The application method comprises the following steps that (A), a stand column and two baffles are fixed on the ground at the entrance and exit correspondingly; (B), when a person entering or exiting from the construction site swipes an IC card in a first card swiping area forverification, after the identity of the entrant is verified as qualified, a controller controls a motor to rotate anticlockwise, a driving block fixed on a rotating shaft rotates reversely with the rotating shaft, and the driving block drives fence bodies to rotate freely in a movable cavity and a rectangular hole until the fence bodies arranged between the baffles and the stand column are completely open; and (C), When the person is away from the construction site, the person can perform the identity verification by swiping the card in a second card swiping area, and when the identity of theperson who is away is verified as qualified, the controller can control the motor to rotate clockwise, the driving block fixed on the rotating shaft can rotate forward with the rotating shaft, and the driving block can drive the fence bodies to rotate freely in the movable cavity and the rectangular hole until the fence bodies arranged between the baffles and the stand column are completely open,so that people can be freely in and out of the construction site.