507results about How to "Guaranteed work performance" patented technology

The invention relates to the technical field of concrete slump detection, in particular to a concrete slump online monitoring method based on data analysis. The method comprises the following steps: S1, collecting temperature, humidity, rotating speed, torque, stirring time, water cement ratio, additive dosage and reaction rate data of concrete in a stirrer in real time; s2, calculating concrete slump by using a dynamic physical property slump estimation algorithm; s3, calculating the concrete slump by using a chemical reaction dynamic slump prediction algorithm; s4, comparing a preset threshold value with a difference value between the two slumps; and S5, measuring the shear stress and shear rate curve of the concrete, and predicting the slump by using the rheological model. According to the concrete slump online monitoring method based on data analysis, accurate monitoring and real-time control of the concrete slump are realized through mutual verification of a dynamic physical property slump estimation algorithm and a chemical reaction dynamic slump prediction algorithm.

The invention belongs to the technical field of magnetic core crack detection, and particularly relates to magnetic core surface crack detection equipment which comprises a detection box and two supporting legs arranged on the lower side wall of the detection box, and an operation panel is fixedly connected to the left side wall of the detection box. When the probe is used for detecting the rod-shaped magnetic core, impurities attached to the surface of the rod-shaped magnetic core can be automatically cleaned in the detection process, and then cracks on the surface of the rod-shaped magnetic core are detected, so that the time spent on an extra dust cleaning procedure is shortened, and the detection efficiency is improved under the condition that the workload of operators is reduced. According to the detection device, the detection accuracy of the rod-shaped magnetic core is guaranteed, the straightness of the rod-shaped magnetic core can be automatically detected while cracks on the surface of the rod-shaped magnetic core are detected through the probe, the detection result is visually displayed to an operator, the operator can conveniently record and analyze the detection result, and the use performance of the detection device is improved.

The utility model discloses a battery monomer, a battery pack and a power utilization device, the battery monomer comprises a shell, an electrode assembly and an adapter, the shell is provided with a first electrode terminal and a second electrode terminal, the electrode assembly comprises a first tab and a second tab which are opposite in polarity, and the adapter is connected with the first tab. The adapter is arranged between the electrode assembly and the shell and comprises a first adapter part and a second adapter part, the first adapter part is electrically connected with the first electrode terminal and the first tab respectively, and the second adapter part is electrically connected with the second electrode terminal and the second tab respectively; and at least parts of the first switching part and the second switching part are overlapped in the axial direction of the battery monomer. Therefore, the over-current area of the first switching part and the over-current area of the second switching part are increased, the technical problem that the over-current area of the switching piece is small is solved, and the over-current capacity of the switching piece is improved.

The utility model discloses a shaving board production line dust efficient recovery device which comprises a dust recovery box, an air inlet pipe is installed at the right end of the dust recovery box, an air outlet pipe is installed at the left end of the dust recovery box, an arc-shaped through hole is formed in the dust recovery box, an annular block is connected into the arc-shaped through hole in a sliding mode, and a cleaning pool is arranged below the annular block. A circular plate is installed at the front end of the annular block, a first motor is installed at the front end of the circular plate, four square holes are symmetrically formed in the annular block, sliding grooves are symmetrically formed in the square holes, guide rods are symmetrically installed in the sliding grooves, sliding blocks are slidably connected into the sliding grooves, and the outer surfaces of the guide rods are sleeved with the sliding blocks. Dust gas is filtered through the filter plate, the first motor drives the blocked filter plate to rotate out of the arc-shaped through hole, a new filter plate rotates into the dust recycling box for filtering work, then the second motor drives the arc-shaped reciprocating block to reciprocate to clean the filter plate, time and labor are saved, and the service life of the filter plate is prolonged.

The surface treatment device for steel wire production comprises a bottom box, a fixing plate is fixedly installed on the bottom box, a screw ring is installed on the side, extending to the center of the bottom box, of the fixing plate, a screw cylinder penetrates through the screw ring and is in threaded connection with the screw ring, and a steel wire penetrates through the interior of the screw cylinder; and a polishing assembly used for polishing the surface of the steel wire is installed at the end of the screw cylinder, and when the screw cylinder rotates, the polishing assembly is controlled to move and polish in the extending direction of the steel wire in a rotating mode. After the grinding assembly is arranged to make contact with the surface of the steel wire, the screw cylinder can drive the grinding assembly to rotate and grind in the circumferential direction of the surface of the steel wire by rotating the screw cylinder so as to remove an oxide layer, and under the thread limiting effect of the screw ring, the screw cylinder can move along the axis while rotating; and the grinding assembly is controlled to rotationally move and grind in the steel wire extending direction, and the grinding effect is effectively improved.

The invention relates to the technical field of raw material crushing, in particular to a raw material crushing device for preparing a fruit preservative. Comprising a base which is provided with a driving module; the outer cylinder is rotationally connected to the base, and a lining plate layer is fixedly connected to the inner side of the outer cylinder; the multiple fixing shells are fixedly connected to the outer cylinder and fixedly connected with the lining plate layer, the fixing shells are slidably connected with baffles, the baffles are in ball joint with spline rods, and the spline rods are in threaded connection with spiral sleeves; the sliding piece is fixedly connected to the spiral sleeve; and the limiting ring is fixedly connected to the base and is in sliding connection with the sliding piece. By changing the moving distance of the baffle and increasing the contact area of the baffle and a mixture, the probability that materials collide with a crushing medium is increased, the material crushing force is increased, the reduction of the particle size of the materials is accelerated, and the effect of controlling the particle size of the crushed materials is achieved.

The utility model discloses a battery monomer, battery pack and power utilization device, the battery monomer includes shell, pole subassembly, pole shank and collector plate, the shell includes shell and cover plate, forms the accommodation cavity of opening in the shell, the cover plate is provided in the opening, pole subassembly is provided in the cover plate, the pole subassembly is provided in the extension space towards the accommodation cavity opening, the extension space is provided with the pole shank and the collector plate. The pole core is arranged in the containing cavity, the current collecting disc is arranged between the pole core and the cover plate and electrically connected with the pole core, and at least part of the current collecting disc is located in the stretching-in space so as to be electrically connected with the pole column assembly. According to the battery monomer disclosed by the embodiment of the utility model, the stretching-in space facing the opening of the accommodating cavity is arranged in the pole component, and at least part of the current collecting plate is arranged in the stretching-in space and is electrically connected with the pole component, so that the electric connection difficulty of the current collecting plate and the pole component can be reduced, and the assembly difficulty of the battery monomer is reduced.

The invention discloses a positioning method and system of an unmanned tower crane. First space coordinates of a tower crane part are defined based on a position system of the unmanned tower crane and the position of the tower crane part of the unmanned tower crane; defining a second space coordinate according to the position of the tower crane part of the unmanned tower crane and the position marked by the satellite system, and defining actual position information of the tower crane part according to the second space coordinate and the first space coordinate, the GNSS coordinates of the tower crane part are defined based on the actual position information of the tower crane part and the actual position information of the unmanned tower crane; the position deviation of the tower crane part relative to the working position is defined according to the GNSS coordinates of the tower crane part and the GNSS coordinates of the working position, and the position regulation and control precision of the tower crane part in the working process is defined according to the position deviation, the multiple environment characteristics and the position precision grade of the working position. The position of the tower crane part in the working process is adjusted and controlled in a high-precision mode, and the working effect of the unmanned tower crane is guaranteed.

The utility model discloses a surface cleaning device with a sewage collection function, which belongs to the technical field of cleaning equipment and comprises a machine body and a ground brush, a sewage suction port is arranged on the ground brush, a sewage barrel is arranged on the machine body and comprises a barrel body and a barrel cover, the barrel body is provided with a sewage inlet pipe, and the barrel cover is provided with an exhaust passage. The sewage barrel is arranged on the front side or the rear side of the machine body and has an inclined state and a lying state along with the machine body, a separation part is arranged in the sewage barrel and divides an inner cavity of the sewage barrel into a first cavity and a second cavity which are communicated with each other, an upper end opening of the sewage inlet pipe extends into the first cavity, and an inlet of the exhaust channel is formed in the cavity wall of the second cavity; the barrel cover is provided with two sets of liquid level detection pieces extending downwards into the barrel body, and the two sets of liquid level detection pieces are each provided with a detection part located in the first cavity. And the positions of the detection parts on the two groups of liquid level detection pieces are reasonably arranged, so that the liquid level detection pieces are convenient to clean while the working performance of the sewage suction fan is ensured.

The invention provides a power device with improved short-circuit current capability and a manufacturing method thereof. The power device comprises at least one cell. The cell is divided into two half cells along the width direction of the cell. Each half cell comprises a drift region, a source doped region and a source metal connected with the source doped region. The source doped region includes a source region and a plurality of contact regions. The source region comprises at least one first extension region, the plurality of contact regions are arranged in the length direction of the cell, and any two adjacent contact regions are spaced by the first extension region. And configuring the connection state of the source metal and the source doped region to be local connection of the source metal of at least one half-cell and at least one first extension region. According to the power device, the on-resistance is increased by prolonging the path of current flowing through the source region, and the short-circuit current capability is improved. The gate structures of part of the cells of the power device are adjusted, so that the short-circuit current capability and the conduction current capability of the device are further balanced. The manufacturing method is simple in steps.

The utility model relates to the technical field of plate shearing machines, and discloses a plate adsorption type plate shearing machine which comprises a plate shearing machine body, a positioning assembly is arranged in the plate shearing machine body, a shearing mechanism is arranged at the top of the plate shearing machine body, and a buffer plate is fixedly connected in the plate shearing machine body. The positioning assembly comprises an anti-warping assembly and an adsorption assembly, the anti-warping assembly is arranged in the plate shearing machine body, the adsorption assembly is arranged in the plate shearing machine body, the anti-warping assembly comprises connecting bases, and the connecting bases are fixedly connected to the front face and the back face of the plate shearing machine body. In the using process of the plate adsorption type plate shearing machine, a plate is adsorbed through the arranged suction cups so as to be positioned, then a first bolt is twisted according to the thickness of the plate to drive a pressing rod, the pressing rod is pressed at one end of the plate, the plate can be prevented from tilting during shearing, and the shearing precision is guaranteed.

The utility model relates to a friction pendulum support mounting device for a building shock insulation layer. The friction pendulum support mounting device comprises a lower buttress steel bar, an embedded plate assembly and a leveling bolt assembly, the pre-embedded plate assembly comprises a pre-embedded steel plate arranged above the lower buttress steel bar, a plurality of bolt sleeve assemblies are distributed at the bottom of the pre-embedded steel plate, the lower portions of the bolt sleeve assemblies are located in the lower buttress steel bar, and a pre-embedded plate reserved opening penetrates through the middle of the pre-embedded steel plate; four leveling bolt assemblies are evenly distributed on the periphery of the bottom of the embedded steel plate, each leveling bolt assembly comprises a leveling screw and a leveling nut, the leveling nuts are screwed on the leveling screws in a threaded mode, the leveling nuts are welded to one of the horizontal reinforcing steel bars of the lower buttress reinforcing steel bars, and the tops of the leveling screws make contact with the bottom of the embedded steel plate. According to the utility model, the elevation and levelness of the embedded steel plate can be adjusted by screwing the leveling screw rod, and the mounting quality of the friction pendulum assembly can be effectively ensured, so that the working performance of the friction pendulum support and the shock isolation effect of the shock isolation layer are ensured.

The utility model discloses a cover plate assembly of battery monomer, battery monomer, battery pack and power utilization device, the cover plate assembly of battery monomer comprises a cover plate body and a pole column assembly, the pole column assembly is arranged on the cover plate body and on the same projection plane, the orthographic projection of the pole column assembly deviates from the center of the outer contour of the orthographic projection of the cover plate body, the projection plane is perpendicular to the thickness direction of the cover plate body, the pole assembly comprises a first leading-out piece and a plurality of connecting pieces, the first leading-out piece is arranged on one side of the thickness direction of the cover plate body, and the connecting pieces penetrate through the cover plate body and are electrically connected with the first leading-out piece. According to the cover plate assembly of the battery monomer disclosed by the embodiment of the utility model, the structural stability of the pole assembly can be ensured while the cover plate body is ensured to have enough space for arranging other structural parts, the diversion area of the pole assembly is increased to a certain extent, high-rate overcurrent is realized, and the working performance of the battery monomer is improved.

The invention relates to a differential pressure type double-valve-clack lever floating ball assembly and a floating ball drain valve, the floating ball assembly comprises a main valve seat, a main valve clack, a pilot valve seat, a pilot valve core, a floating ball and a floating ball seat, and the main valve seat is provided with a through discharge orifice; the main valve clack is located at one end of the main valve seat and is hollow, and a through hole is formed in the end, close to the discharging hole opening, of the main valve clack. The pilot valve seat is fixedly mounted at the through hole, a through discharge channel is formed in the pilot valve seat, and a plurality of through small holes are uniformly formed in one end of the pilot valve seat at intervals; the pilot valve element penetrates through the other end of the main valve clack, and one end of the pilot valve element extends into the other end of the pilot valve seat and is attached to the discharging channel in a sliding mode. The floating ball seat is fixedly mounted on the right side of the main valve seat; the end, connected with the main valve seat, of the floating ball connecting rod is rotationally connected with the other end of the pilot valve element through a connecting assembly. The double valve elements are adopted, large pressure difference can be solved in advance, and therefore the large valve element can be opened with small acting force.

The utility model relates to the technical field of clamps, and provides a welding clamp. The welding clamp comprises a bottom plate, a supporting assembly and a clamp, the bottom plate is provided with at least two first sliding rails, the two first sliding rails are arranged side by side, the supporting assembly is installed on the first sliding rails, the supporting assembly can move in the extending direction of the first sliding rails, the supporting assembly is used for installing a first clamp unit, and an installation structure is formed on the bottom plate. The mounting structure is used for mounting the second clamp unit. According to the welding fixture provided by the embodiment of the invention, the universality of the welding fixture is improved.

The utility model discloses an air guide structure, a panel assembly, an air conditioner indoor unit and a heating and ventilation system. The air conditioner indoor unit is provided with an air outlet channel, and the air guide structure is arranged in the air outlet channel. The air guide structure comprises an air guide plate, a plurality of air swinging blades and a driving assembly. The air guide plate extends in the first direction. The multiple air swinging blades are rotationally connected to one side of the air guide plate and arranged at intervals in the first direction. The driving assembly comprises a first driving part, a second driving part and a mounting base, the first driving part and the second driving part are arranged on the mounting base, the first driving part is used for driving the air guide plate to swing at the air outlet channel, and the second driving part is used for driving the air swing blades to swing relative to the air guide plate. According to the technical scheme, the space utilization rate of the air conditioner indoor unit can be increased while the air guiding effect is guaranteed.

The invention relates to the technical field of vehicles, in particular to a power assembly for a vehicle. The bullet train assembly comprises a motor, a speed reducer and a motor controller, and a speed reducer shell is connected to one end of a motor shell; the electric control shell is arranged at the other end of the motor shell, a containing cavity is defined by the electric control shell, and a heat dissipation groove is formed in the side face, facing the containing cavity, of the electric control shell; in the thickness direction of the electric control shell, the driving control board and the heat dissipation groove are oppositely arranged; a heat dissipation part is arranged in the motor shell and the speed reducer shell, the heat dissipation groove is communicated with the heat dissipation part, the heat dissipation groove comprises a bottom wall and a peripheral wall surrounding the periphery of the bottom wall, the bottom wall comprises a body part, a first part and a second part, the first part and the second part are located on the two sides of the body part in the first direction respectively, and the first part and the second part are located in the direction perpendicular to the bottom wall and facing the containing cavity. The body part protrudes out of the first part and the second part, a liquid inlet is formed in the first part, and a liquid outlet is formed in the second part. The heat dissipation structure of the power assembly is simplified, and the heat dissipation efficiency is improved.

The utility model provides a lamp holder light reflecting structure and a lamp. A pull aluminum profile of the device comprises a lamp plate clamping groove for clamping a light emitting unit, a light guide clamping groove for clamping a light guide plate, a radian shaping section for clamping a light reflecting plate and a second light reflecting clamping groove, the radian shaping section and the second light reflecting clamping groove are oppositely arranged at an angle, and the radian shaping section comprises a radian shaping section; when the reflecting plate is clamped and fixed in the radian shaping section and the second reflecting clamping groove, the overall radian is shaped through the arc-shaped shaping section. The lamp panel clamping groove, the light guide clamping groove and the light reflection clamping groove are integrally formed in the drawn aluminum profile, the core components of the lamp panel, the light reflection panel and the light guide plate are all integrated on the drawn aluminum profile made of the metal material, the working performance of the core components of the lamp is guaranteed, only two ends of the light reflection panel are clamped in the clamping grooves, and the bent appearance of the light reflection panel is limited by only one radian shaping section. The structure is simplified, the using amount of aluminum materials is reduced as much as possible, and light weight of the lamp is achieved to the maximum extent.

The invention relates to the technical field of geophysical prospecting, in particular to a borehole transient electromagnetic instrument, which comprises a power supply short section and a detection short section, the power supply short section and the detection short section are detachably connected, the borehole transient electromagnetic instrument can be propelled along with a drill rod, and the detection short section can simultaneously measure magnetic field change information in three orthogonal directions. A data storage unit and an attitude measurement module are also integrated. The invention provides a high-integration borehole transient electromagnetic instrument, which can realize integration of borehole trajectory measurement and transient electromagnetic three-component measurement, has the function of storing test data, does not need to connect a communication cable in the test process, and reduces the complexity of system connection.

The invention relates to the technical field of household appliances, in particular to a heat dissipation control method and device of an electric control mainboard, the electric control mainboard and a storage medium. According to the invention, when the electric control main board has the power output requirement, the current temperature difference value is calculated according to the current working temperature and the theoretical working temperature of the electric control main board so as to measure the power requirement of the electric control main board; and the current temperature difference value and the historical temperature difference value are comprehensively considered through a preset power control model to adjust the operation power of the electric control mainboard, so that the output power of the electric control mainboard is reduced on the premise that the performance of the electric control mainboard is not affected, heat generated by the mainboard due to overlarge output power is reduced, and the service life of the mainboard is prolonged. The technical problems that in the prior art, a circuit board is poor in heat dissipation capacity during working, and potential safety hazards exist are solved, and meanwhile the working performance of the electric control mainboard is guaranteed.

The invention discloses a modified slag sulphoaluminate cement-based ultra-high performance concrete and a preparation method thereof, and belongs to the technical field of concrete. The modified slag sulphoaluminate cement-based ultra-high performance concrete comprises the following raw material components in parts by weight: 36 to 108 parts of sulphoaluminate cement, 24 to 72 parts of ordinary Portland cement, 720 to 924 parts of activated granulated blast furnace slag powder, 216 to 300 parts of anhydrite, 1200 to 1320 parts of quartz sand, 12 to 36 parts of nano-alumina, 9.6 to 24 parts of rare earth polycarboxylate water reducer, 13 to 28 parts of nano-SiO2 combined with silane coupling agent modified polyoxymethylene fiber, and 192 to 240 parts of water. The invention has the advantages of low hydration heat, low shrinkage, high early strength, stable late strength, etc., and can provide technical support for the further application and promotion of ultra-high performance concrete.

The utility model provides a double self-locking hydraulic cylinder, which belongs to the technical field of hydraulic cylinders and comprises a cylinder body and a piston rod, the top of the cylinder body is fixedly connected with an annular lock cover sleeved outside the piston rod, the outer wall of the annular lock cover is fixedly connected with a support arranged at the top of the cylinder body, and an annular clamping seat is rotatably arranged in an inner cavity of the annular lock cover. A self-locking piece is fixedly installed on the circumferential inner wall of the annular clamping base, clamping grooves corresponding to the self-locking piece are evenly formed in the outer wall of the piston rod in the longitudinal direction, and a rotary clamping assembly for driving the annular clamping base to rotate is arranged in an inner cavity of the support. The annular clamping base is driven by the rotary clamping assembly to rotate in the circumferential direction of the inner cavity of the annular lock cover, so that the annular clamping base drives the self-locking piece to be clamped into the clamping groove in the corresponding position, the stability of the position where the piston rod is located after extension is guaranteed, and the position change is avoided by locking the position of the piston rod through the two sides.

The invention discloses a temperature anomaly processing method for a hot air heating device, and belongs to the technical field of heating device working methods.The temperature anomaly processing method comprises the steps that S100, if the temperature rise of a temperature detection element within a first time interval delta t1 reaches delta T1, the temperature detection element is started; the control module judges the occurrence of temperature abnormity according to the temperature signal fed back by the temperature detection element, and executes the step S200; s200, the control module starts countdown, if the temperature rise of the temperature detection element within the second time interval delta t2 reaches delta T2, the control module judges that the temperature is abnormal and continuous according to a temperature signal fed back by the temperature detection element, and the step S300 is executed; and S300, the control module executes the protection program. According to two dynamic temperature rise signals of the temperature detection element, whether the temperature of the device is abnormal or not is judged, the accuracy of judgment can be greatly improved, when the temperature abnormal condition does not occur really, the heating piece conducts heating normally, and the working effect of the device can be guaranteed.

The utility model relates to the field of heat dissipation structures of servers, in particular to a heat dissipation structure of a micro server, which comprises a shell, a mounting chamber is arranged in the shell, heat dissipation fins are arranged on the outer wall of the shell, the thickness of the heat dissipation fins is gradually reduced from one end close to the outer wall to the other end, and a CPU and a heat conduction piece are arranged in the mounting chamber. The heat conduction piece is arranged between the CPU and the side wall of the shell provided with the heat dissipation fins. The heat dissipation structure of the micro server has the advantages of being good in heat conduction effect and high in efficiency, not only balancing performance, but also reducing energy consumption, and guaranteeing working performance of equipment.

The utility model provides an energy-saving window, and belongs to the technical field of energy-saving windows. Comprising a window frame, a fixed window and a movable window are arranged in the window frame, a top plate is installed on the side face of the upper end of the window frame and slidably connected with a shifting assembly, the shifting assembly is installed on the side face, provided with the top plate, of the window frame, and a replacement assembly is installed in the shifting assembly. According to the energy-saving window, the shifting assembly is arranged and arranged outside the window frame, after long-time use, a gap cannot be generated between the rotating handle and the window frame after the rotating handle is abraded, and therefore the problem that the energy-saving effect of the energy-saving window is reduced is avoided, the brushing cloth is arranged between the fixed window and the movable window, sunlight cannot be shielded, and the energy-saving effect of the energy-saving window is improved. According to the energy-saving window, the replacement assembly is arranged, so that the brush cloth can be replaced by a single person, the problem that the cleaning brush falls off and easily hits pedestrians is solved, and the energy-saving window is convenient for people living alone to use.

The utility model relates to the technical field of management systems, in particular to a parallel battery management system. In order to solve the problems that the available capacity of a battery of a system capable of carrying out heat dissipation treatment on the battery is reduced in a low-temperature environment, so that the battery cannot provide the electric quantity which is the same as that at a normal temperature, and the performance of the battery is reduced, the following technical scheme is provided: the battery heat dissipation device comprises a box body with an opening in the top, and five groups of U-shaped mounting frames are arranged in the box body; batteries are mounted in the five groups of mounting racks, the middle group of mounting racks is fixedly connected into the box body, and the other four groups of mounting racks are slidably connected into the box body; the connecting assembly is used for connecting the five groups of mounting frames; and the adjusting mechanism is matched with the connecting assembly to synchronously adjust the positions of the four groups of mounting frames which are arranged in a sliding manner. According to the utility model, the battery can be maintained in a proper working temperature range, the safe and stable operation of the battery is ensured, and the working performance and the service life of the battery are ensured at the same time.

The utility model discloses a radar antenna heating device, which relates to the technical field of radar antennas and comprises a hollow hemispherical protective cover and a hollow bearing circular ring fixed on the plane of the protective cover, and further comprises a driving unit and a heating unit which are arranged on the bearing circular ring, the driving unit comprises a positioning circular ring, an annular gear, a rotating shaft, a gear disc and a driving motor, an annular groove is formed in the inner bottom surface of the bearing circular ring, and the positioning circular ring is movably arranged on the annular groove; each heating unit comprises a supporting frame, a positioning bolt, an arc-shaped heating strip and a semi-annular heating block. According to the utility model, the positioning ring fixedly arranged on the bottom surface of the annular gear can rotate on the annular groove in a manner of being matched with the annular gear for reciprocating rotation, the heating unit can be in reciprocating contact with all curved surface areas of the hollow hemispherical protective cover along with rotation of the annular gear, and accumulated snow covering the protective cover can be fully heated and melted; and the equipment heating effect is sufficient and wide in range.

The utility model belongs to the technical field of automobile production, and particularly relates to an automobile wire harness guide mechanism, which comprises a base, a moving block, a turntable and a fixed frame, and further comprises a rotating rod, a mounting seat, a fixed semi-ring I and a moving plate, a second fixing semi-ring matched with the first fixing semi-ring is arranged on the side wall of the mounting base, the fixing frame matched with the rotating disc is slidably mounted on the mounting groove, the moving plate is mounted on two threads of the two-way threaded rod, a trapezoidal block is arranged on the top face of the moving plate, and the two ends of the trapezoidal block are fixedly connected with the two-way threaded rod. An adjusting groove matched with the trapezoidal block is formed in the bottom surface of the fixed frame; by arranging the rotating disc and the fixing frame, it is guaranteed that a user can adjust the orientation of the wire harness according to the actual situation, by arranging a friction layer, the working effect of the fixing frame is guaranteed, and by arranging a first fixing semi-ring installed on a moving block, the device can be suitable for wire harnesses of different sizes.

The present invention belongs to the technical field of admixtures for tunnel engineering support concrete, and in particular discloses an early high-strength hydrophobic anti-corrosion admixture for tunnel engineering support concrete and a preparation method thereof, as well as the application of the early high-strength hydrophobic anti-corrosion admixture in tunnel support shotcrete. The early high-strength hydrophobic anti-corrosion admixture, by reasonably matching high-activity admixtures, medium-low activity admixtures, hydrophobic components, early strength components, expansion components, collapse-preserving components, slow-setting components, and crack-limiting components, when applied to tunnel support shotcrete, can improve the overall strength and impermeability of the primary support concrete, and significantly reduce the calcium dissolution rate of the matrix, so as to significantly inhibit the reduction of the dissolution strength of the primary support concrete, and at the same time prolong the blocking time of the drainage system, so as to ensure the long-term safe service of the tunnel structure.

The invention discloses a metasurface structure for reducing normal incident scattering of an antenna, and the metasurface structure employs a double-layer design, combines an absorption layer and a frequency selection surface layer, and achieves broadband absorption through a periodically two-dimensional unfolded microstrip patch unit and a three-layer resistor loading metal ring. Ansys electromagnetic field simulation software verifies that the structure effectively reduces the radar cross section of the microstrip antenna within the frequency band of 3-10 GHz, and ensures the normal work of the antenna at the same time. Through deep analysis and simulation optimization, key factors influencing the performance are determined, and the balance between the wave permeability and the wave absorbing property is realized. Besides, an adjustable resistance circuit, a reconfigurable mechanism, an intelligent algorithm and a sensor technology are integrated, the stability and the automation level of the antenna performance are further improved, and an effective solution is provided for improving the scattering reduction effect during forward incidence of radar waves.