74 results about "Square cavity" patented technology

The invention provides a method for solving the natural convection problem of a two-dimensional square cavity, and the method comprises the steps: carrying out the grid division of the square cavity, so as to obtain the coordinate position of each discrete point in the square cavity; taking the coordinate position of each discrete point in the square cavity as input data, designing a physical information neural network in combination with discrete Fourier transform characteristics, and adding a hard constraint condition on the boundary of a to-be-solved equation of the two-dimensional square cavity natural convection problem; calculating a loss function for training the physical information neural network, embedding the to-be-solved equation into the loss function, performing iterative optimization on the network model of the physical information neural network based on the loss function and dynamically updating network parameters until the network model converges, and ending training; and predicting new input data by using the trained physical information neural network to obtain numerical solutions of a velocity field, a temperature field and a pressure field of the two-dimensional square cavity natural convection problem as output results. According to the method, the precision and convergence speed of solving the natural convection problem of the two-dimensional square cavity are improved.

The mixing tank comprises a tank body, a fixing plate is fixedly installed at the right end of the inner side wall of the tank body, an inclined face is arranged on the front side face of the fixing plate, a cover body is detachably installed at the top of the tank body, a feeding pipe is embedded in the left side of the top of the cover body, and a motor is fixedly installed in the middle of the top of the cover body; a contact rod is installed on the side wall of the rotating rod, a fixing plate with an inclined face is installed on the inner side wall of the tank body, the rotating rod can be driven by the motor to rotate, then the contact rod is made to conduct circular motion along with the rotating rod, the side wall of the contact rod makes contact with the inclined face, and therefore the contact rod can be driven to rotate. Furthermore, the rotating rod and the stirring rods are driven to move up and down, so that the auxiliaries between the two stirring rods are conveniently stirred and mixed, the mixing time is shortened, and the mixing efficiency is improved.

The present invention discloses a high-efficiency combined machining method for electric discharge material extraction. The tubular hollow electrode is used to drill holes in a workpiece at high speed, providing preparation for subsequent high-efficiency machining using a square tubular electrode. The square tubular electrode is a sleeve electrode with a certain wall thickness, which erodes the materials around the part where material extraction is required, leaving a groove with the same shape as the cross-section of the square tubular electrode on the workpiece after machining. The frame-shaped electrode can be annular, rectangular or L-shaped, which erodes the materials on the bottom surface of the square cavity. After machining with the frame-shaped electrode, the material core for material extraction will be separated from the workpiece matrix as a whole. In the process of machining the cavity by this high-efficiency material extraction method, only the materials around the cavity and on the bottom surface need to be eroded, greatly reducing the amount of eroded materials, lowering the machining cost and shortening the machining cycle.

The utility model discloses a detachable plate heat exchanger shell which comprises a bottom shell plate, a top shell plate is fixedly installed at the top ends of a left shell plate, a right shell plate and a rear shell plate, a front cover plate is rotatably installed at the front end of the top shell plate, and a plurality of heat exchange plates are installed in a cavity formed by the bottom shell plate, the left shell plate, the right shell plate, the rear shell plate and the top shell plate. The inner side of the left shell plate is spirally connected with a heat exchange plate closer, the bottom shell plate, the left shell plate, the right shell plate, the rear shell plate and the top shell plate jointly form a square cavity, a plurality of heat exchange plates can be inserted into the cavity in parallel, and the heat exchange plates can be attached to one another to form a closed heat exchange channel by screwing the heat exchange plate closer. The heat exchange plate at the leftmost end is provided with a bent pipe, so that liquid or gas can circularly flow, the heat exchange plates can be quickly disassembled through reverse operation, protection can be provided by closing the front cover plate, and the device has the capacity of being convenient to install, disassemble and protect.

This invention provides a mobile wind tunnel device capable of outputting uniform droplets, belonging to the field of icing and anti-icing technology for ships and marine structures. The device includes: a stabilizing rectangular cavity and a transitional circular-to-square cavity, the stabilizing rectangular cavity and the transitional circular-to-square cavity being connected. The circular opening of the transitional circular-to-square cavity is connected to a variable frequency fan. A honeycomb rectifier and multiple airfoil spray frames are installed inside the stabilizing rectangular cavity, with the honeycomb rectifier located between the variable frequency fan and the airfoil spray frames. This mobile wind tunnel achieves uniform droplet output, maintaining a stable airflow field through the honeycomb rectifier; by arranging heating tape in the water and air pipes inside the airfoil spray frames, the wind tunnel device can operate for extended periods in low-temperature environments without icing; and a control cabinet controls wind speed, water pressure, and air pressure to obtain icing data for the ship's superstructure under different wind speeds and droplet diameters.

A stove combustion assembly comprises a center fire cover and a fire distributor seat, and the fire distributor seat comprises a center fire cover seat with an upper opening, a center air inlet connector, an outer ring air inlet cavity, an outer ring air inlet connector, a radial fuel gas channel, an axial secondary air channel, an outer ring fuel gas groove and an outer ring fire cover part. The radial gas channel is communicated with the outer ring gas inlet cavity and the outer ring gas groove, and acute included angles are formed between bottom plates of the radial gas channel and the outer ring gas groove and the horizontal plane of the radial outer side. The top of the outer ring fire cover part is in a curved surface shape and is sequentially provided with a bottom right trapezoid cavity, a square cavity, a top straight trapezoid cavity, a lower outer ring combustion hole group communicated with the waist of the bottom right trapezoid cavity, an upper outer ring combustion hole group communicated with the square cavity and an inner ring combustion hole group communicated with the waist of the top straight trapezoid cavity from bottom to top; and the central fire cover seat supports the central fire cover. The distributor seat and the outer ring fire cover part are integrated, and the combustion holes in the outer ring fire cover part are long, so that flame stabilization and backfire prevention are realized.

The utility model provides an integrated waterproof valve of an air inlet system, which relates to the technical field of waterproof valves and comprises an air inlet machine body, an air inlet groove is arranged on one side wall of the air inlet machine body, an embedding groove is arranged on the inner wall of the bottom of the air inlet groove, an arc hole is arranged on the inner wall of the bottom of the embedding groove, a square cavity is arranged inside the air inlet machine body, and the square cavity is communicated with the embedding groove. And the other end of the arc hole communicates with the square cavity, and a hydraulic rod is embedded and fixedly connected to the inner wall of the top of the air inlet groove. The waterproof valve and the air inlet of the air inlet system are integrated, the effect of reducing connecting points can be achieved, the effect of reducing the fault risk can be achieved, the overall reliability of the system can be improved, meanwhile, when the water stain sensor senses water stains, signals can be transmitted to the controller, and the controller is controlled to control the water stain sensor. At the moment, the controller can control the hydraulic rod to push the blocking block to descend to block the interior of the caulking groove, the waterproof effect can be achieved again, and therefore the effect of improving the waterproof performance can be achieved.

The present invention discloses an artificial surface plasmon absorbing grid, method and air intake, which belong to the field of stealth technology of air intake system; the absorbing grid is composed of a plurality of square cavity unit arrays, the square cavity unit is a square ring cavity, and its circumferential wall surface is a multi-layer dielectric structure, and the wall surface is a frequency selective surface FSS, a synthetic resin PR, and a polyester resin PET from the inside to the outside, and each layer is placed in parallel; wherein the polyester resin PET of adjacent square cavity units is bonded by an indium tin oxide ITO film to form an artificial surface plasmon absorbing grid. The purpose of the present invention is to change the electromagnetic scattering characteristics of the air intake, reduce its radar scattering cross-sectional area, and thus improve the radar stealth performance of the aircraft.

The invention provides an air spring low-frequency vibration isolation device based on turn-back type square cavity flow, which comprises an air spring main air chamber, an additional air chamber, a mass block and a turn-back type square cavity throttle pipe, the mass block is connected with the upper end of the air spring main air chamber, the additional air chamber is connected with the lower end of the air spring main air chamber, and the turn-back type square cavity throttle pipe is connected with the mass block. The turn-back type square cavity throttling pipe is arranged in the main air chamber and the auxiliary air chamber of the air spring, and air in the main air chamber of the air spring can flow into or flow out of the auxiliary air chamber through the turn-back type square cavity throttling pipe. According to the air spring, the turn-back type square cavity throttling pipes are arranged in the main air chamber and the auxiliary air chamber of the air spring in the vertical direction, so that air in the main air chamber of the air spring can flow into or out of the auxiliary air chamber through the turn-back type square cavity throttling pipes; the gas can form an airflow vortex in the square cavity of the turn-back type square cavity throttle pipe, so that energy consumption is increased, vertical low-frequency micro-vibration is effectively isolated, and vibration isolation performance is improved.

The utility model relates to an efficient heat dissipation blower shell in the blower field, which comprises an assembly shell, the assembly shell comprises a left piece and a right piece which are assembled through a buckle structure on the inner side of the assembly shell, the upper side of the interior of the assembly shell is provided with a first square cavity, and the top of the assembly shell is provided with a second square cavity; a first square cavity and a second square cavity are formed in the shell body, an assembly plate is inserted into the first square cavity, a cover plate is inserted into the second square cavity, heat dissipation holes are formed in the assembly plate, and heat dissipation fins are welded to the inner side of the assembly plate. And the assembly plate is limited through the limiting corner connector and the limiting shifting piece, so that the heat dissipation area is increased through the heat dissipation fins when the blower is used, heat can be effectively dissipated out, and the heat dissipation efficiency is improved.

The invention discloses a novel sheet-type double-layer jack terminal and a connector, and relates to the technical field of connectors, the novel sheet-type double-layer jack terminal comprises a terminal sample plate which is integrally punched and formed, the head part of the terminal sample plate is a reed area, the middle part of the terminal sample plate is a square cavity area, the tail part of the terminal sample plate is a connecting area, and when the terminal sample plate is bent, two layers of reeds which are symmetrical up and down are formed in the reed area; an insertion space used for being matched with a contact pin is formed between the two layers of reeds which are symmetrical up and down. According to the terminal provided by the invention, the reed area of the integrally punched and formed terminal sample plate is bent to form the two layers of reeds which are symmetrical up and down, so that the two layers of reeds which are symmetrical up and down are of an integrally connected structure and do not need to be connected through rivets, the contact resistance between the two layers of reeds which are integrally connected is effectively reduced, and the service life of the terminal is prolonged. The contact resistance between the upper reed and the lower reed is further reduced, the current-carrying capacity of the terminal is improved, and the technical problem that large contact resistance still exists between the upper reed and the lower reed due to the fact that the upper reed and the lower reed of an existing terminal are connected through a rivet is solved.

The utility model relates to a waterproof structure, in particular to a modularized waterproof protection plate device. Comprising an open cube frame body, an inner cavity of the cube frame body is divided into a plurality of small square cavities distributed in a latticed mode through a plurality of vertical partition plates which are arranged in a criss-cross mode, the interior of each small square cavity is divided into an inner cavity and an outer cavity through a transverse partition plate, one cavity is a closed cavity, and the other cavity is a closed cavity. One cavity is a closed cavity, a pressure air capsule is placed in the closed cavity, the other cavity is an open cavity, a steel wire is arranged in the middle of the open cavity, and a high-strength cementing material is poured in the open cavity; the outermost side of the device is a high-strength cementing material, the middle part of the device is a pressure air capsule buffer heat-insulating layer, and the inner side of the device is a special non-cured asphalt waterproof layer, so that a three-layer protection effect on a coiled material waterproof layer is achieved, the assembly type installation construction can be realized, the construction process is simplified, and the investment of manpower, materials and construction period is reduced.

The application discloses a preparation method, product and device of a square core optical fiber preform. The preparation method comprises the following steps: (1) making the rotating central axis of a Leilo triangular drill bit coaxial with the geometric central axis of a circular cavity cladding sleeve, and drilling a rounded square with the width d as the side length by using the Leilo triangular drill bit to obtain a square cavity cladding sleeve; (2) sleeving a square core rod with the width d' into the square cavity cladding sleeve, and stretching or fusing the square core rod into a circular solid rod; and (3) manufacturing the square core optical fiber preform according to the designed shape size and refractive index profile. The Leilo triangular drill bit is designed according to the width fixing principle of the Leilo triangular structure, and can be used for square hole processing of brittle materials such as quartz glass. The optical fiber prepared by using the square core rod and the square hole sleeve combination drawing reduces the probability of uncontrollable core-cladding interface air line occurrence caused by the original square core rod and circular sleeve combination drawing, and guarantees the reliability of the optical fiber.

The invention relates to the technical field of large-size silicon carbide saggar dry-method mechanical pressing, and discloses a large-size thin-wall silicon carbide saggar dry-method mechanical pressing method and a large-size thin-wall silicon carbide saggar dry-method mechanical pressing forming die. The large-size thin-wall silicon carbide saggar dry-method mechanical pressing forming method comprises the steps that firstly, silicon carbide saggar raw materials are treated; step 2, processing and mounting a mechanical pressing forming frame and a movable block; step 3, positioning the loose piece; step 4, intervening the distribution of the mixed fine powder; 5, layered material distribution and pressing of the raw materials; and sixthly, the large-size thin-wall silicon carbide saggar is demolded. The invention discloses a dry-method mechanical pressing forming die for a large-size thin-wall silicon carbide saggar. The mechanical pressing die comprises a die sleeve I and a die sleeve II, the outer side wall of the die cavity is tightly attached and fixed to the interior of a square cavity defined by the first die sleeve and the second die sleeve. And the mechanical pressing forming frame is mounted in the mold cavity. The method has the beneficial effects that the forming strength and the density distribution uniformity are improved, so that the thermal shock stability is improved, and the defects of unfilled corners and pitted surfaces which are easy to generate during demolding are reduced.

This invention discloses a semi-circular lithium metal electrolytic cell, belonging to the field of electrolytic cell technology. It includes a shell with interconnected semi-circular and square cavities inside. The square cavities gradually narrow from the connection points of the semi-circular cavities, and the ends of the square cavities furthest from the semi-circular cavities are connected by arc-shaped corners. The cathode is located inside the square cavity of the electrolytic cell, and the anode is installed at the top of the electrolytic cell and extends into the cathode cavity. This invention relies on the magnetic-thermal field generated by the graphite anode group within the square cavity to drive the molten salt electrolyte to generate a flow field. The varying spacing of the square cavities within the inner shell drives the lithium metal liquid to flow into the semi-circular cavity, while the arc-shaped corners prevent any residual lithium metal liquid.

The utility model relates to the technical field of power distribution network operation detection, in particular to an electric power system power distribution network operation detection device which comprises a detection device body and a fixing block, the fixing block is fixedly connected to one end of the detection device body, and one end of the detection device body is provided with an adsorption part. The adsorption part comprises a gas collection cavity, suction cups, square cavities, piston plates and communicating pipes, the gas collection cavity is fixedly connected to the side wall of the detection device body, the two suction cups communicate with the gas collection cavity, the two square cavities are fixedly connected to the two ends of the detection device body correspondingly, and the piston plates communicate with the two square cavities; the interior of the square cavity can be in a negative pressure state when the piston plate moves upwards, and the square cavity is communicated with the square cavity through the communicating pipe, so that the suction cup can be more stably adsorbed on the outer surface of a rod of the power distribution network, and the fixing effect on the detection device body is achieved.

The utility model discloses a clamp for waterproof material detection, relates to the technical field of clamps, and aims to solve the problems that in the prior art, when waterproof materials are clamped and fixed, workers need to manually rotate a rotating handle for operation, the labor amount of the workers is increased, the working efficiency is reduced, and the practicability is poor. A fixed arm is installed below one side of the back plate, a movable arm is arranged on one side of the back plate along the upper portion of the fixed arm, a fixed block is arranged above the movable arm, a top plate is fixedly installed above the fixed block, the top plate is fixedly connected with the back plate through a screw, a square cavity is formed in the fixed block, and the top plate is fixedly connected with the back plate through a screw. A top block is arranged on the upper portion of the interior of the square cavity, a first spring is fixedly installed below the top block, a bottom block is fixedly installed below the first spring, the lower end of the bottom block extends out of the interior of the fixed block and is fixedly connected with the movable arm, a slot is formed in one side of the top block, and a side box is fixedly installed on one side of the fixed block.

The utility model relates to a cloth rolling device for a knitted fabric heat-setting machine, which belongs to the technical field of knitted fabric rolling, and comprises a mounting seat, a cloth roller, two setting rollers and an adjustment assisting structure, the top of the mounting seat is fixedly connected with a mounting frame, a square cavity is arranged in the mounting frame, and the adjustment assisting structure comprises a gear and two T-shaped plates. The gear is rotatably connected to the interior of the square cavity, the connecting plate is pulled through the handle, the connecting plate releases or fixes the position of the T-shaped plate through the four connecting rods, the two inner plates, the spring and the anti-moving column, one connecting column is pulled, the connecting column drives the other toothed plate to move in the opposite direction through the T-shaped plate, the toothed plate and the gear which are connected with the connecting column, and therefore the T-shaped plate can move in the opposite direction. The two T-shaped plates and the two connecting columns move relatively, the two connecting columns drive the sliding blocks to move so that the cloth roller can be clamped in the clamping holes or clamping of the cloth roller can be relieved, and therefore the cloth roller can be rapidly disassembled and assembled, and the replacement efficiency of the cloth roller is effectively improved.

The invention discloses an electric power construction formwork connecting frame, and relates to the technical field of formwork connecting frames, the electric power construction formwork connecting frame comprises a formwork body, a first clamping plate and a second clamping plate are arranged at the upper end and the lower end of the periphery of the formwork body in a surrounding mode correspondingly, and a through type square opening is formed in the left end of the outer wall of the front side of the first clamping plate and the left end of the outer wall of the front side of the second clamping plate; square blocks are fixedly installed on the outer walls of the rear sides of the first clamping plate and the second clamping plate, a straight block is arranged between the first clamping plate and the second clamping plate, a square cavity is formed in the straight block, and rectangular openings which are parallel to each other and communicate with the square cavity are formed in the outer surfaces of the upper end and the lower end of the straight block; an adjusting assembly used for driving the first clamping plate and the second clamping plate to move relatively is arranged in the square cavity. Through cooperation of the rotary knob, the rotary shaft rod, the connecting plate, the gear and the rack, the first clamping plate and the second clamping plate are pushed to relatively move along the periphery of the formwork body, so that the heights of the first clamping plate and the second clamping plate are rapidly adjusted according to different square column formworks, the labor intensity of workers is reduced, and the working efficiency is improved.

The present invention relates to a square cavity biting edge forming device and a forming method thereof, wherein a cavity seat for placing a U-shaped cavity is installed on the top surface of a feeding pre-installation machine, and end cover seats for horizontally placing end covers are installed on the outside of both ends of the cavity seat; a flipping mechanism pushes the flip cover seat to flip toward the cavity seat, so that the end covers are spaced apart and located on both sides of the U-shaped cavity to complete pre-installation, and are transferred to the biting edge machine by a transfer mechanism; the biting edge machine is provided with a tightening mechanism for fixing and limiting the U-shaped cavity, and fastening mechanisms for fixing the end covers are provided on the outside of both ends of the tightening mechanism, and also includes a biting edge driving mechanism, which rivets and engages the two end edges of the U-shaped cavity and the end cover edges that are close to each other as the chain rotates, and a square cavity structure with an opening facing downward is formed after the chain is driven for one circle, thereby realizing the biting edge forming of the square cavity in an automated manner, with a fast cycle and high forming efficiency, thereby greatly improving the forming stability and consistency.

The utility model discloses a mould structure capable of flexibly changing a shape, which belongs to the technical field of moulds and is characterized by comprising a mould, a square cavity is arranged at the top of the mould, T-shaped grooves are communicated with two sides of the inner wall of the square cavity, metal blocks are fixedly connected with the inner walls of the T-shaped grooves, and the metal blocks are fixedly connected with the mould. The sides, away from each other, of the metal blocks make contact with adjusting assemblies, and the surfaces of the adjusting assemblies are in threaded connection with the inner walls of the two sides of the mold. The adjusting assembly comprises an adjusting bolt, the surface of the adjusting bolt is in threaded connection with the inner walls of the two sides of the die, and the problems that after an existing die is produced, the internal shape of the existing die is usually a fixed shape, and when products of different shapes need to be produced, multiple different dies need to be manufactured, so that the production cost and the time cost are increased, and the production efficiency is increased are solved. And in addition, the internal structure of the mold which can be partially deformed is relatively complicated, so that inconvenience is brought to subsequent maintenance work.

The invention discloses a device and a method for measuring a three-dimensional velocity field of a rod cluster channel, which are applied to the field of nuclear power reactor core thermal hydraulic power and are used for accurately measuring the three-dimensional velocity field of a coolant in the rod cluster channel. The lower rectifying chamber, the experimental square cavity and the upper rectifying chamber are sequentially communicated from bottom to top to form a fluid channel; a plurality of hollow-core fuel rods which are arranged in an array are arranged in the experimental square cavity, and the hollow-core fuel rods are fixed through a positioning grillwork and a positioning partition plate. The UDV ultrasonic probe system comprises a transverse UDV probe array, an axial UDV probe array and an embedded measuring unit, wherein the lateral surface of the transverse UDV probe array is arranged in a layered manner and corresponds to the rod gap; the axial UDV probe array is arranged at the top of the transverse UDV probe array; the axis of the axial UDV probe array is vertical to the cross section; the embedded measurement unit comprises an embedded UDV probe and a positioning device, the positioning device adjusts the position of the probe through an axial adjusting device, a circumferential adjusting knob and the like, and measurement coverage and accuracy are guaranteed.

The application discloses a kind of chip verification packages, technical solutions include DBC substrate and side plate, the side plate is vertically arranged in the edge of DBC substrate, and then the DBC substrate and side plate form a square cavity;Including gasket one, gasket two, gasket three and gasket four, the gasket one, gasket two, gasket three and gasket four are welded on DBC substrate and electrically connected with DBC substrate, pin needle one, pin needle two, pin needle three and pin needle four are vertically arranged on the gasket one, gasket two, gasket three and gasket four respectively, the advantages of the present application provide the mounting space of integrated sensor chip, avoid pin needle and chip back heat dissipation cause signal interference, directly measure chip performance is convenient.

The utility model relates to the technical field of assembly type floor slabs, in particular to a novel DCKQ cavity component for house building engineering, which comprises a cavity component and a dense rib beam, the cavity component comprises a bottom concrete slab, a square cavity and a top concrete slab, the square cavity and the top concrete slab are equal in boundary dimension, and the dense rib beam is arranged in the cavity component. The boundary dimension of the bottom concrete slab is larger than that of the top concrete slab, and a plurality of first steel bars extending out of the side faces are embedded in the four side faces of the top concrete slab respectively. A plurality of second reinforcing steel bars are arranged on two adjacent side surfaces of the bottom concrete slab, and U-shaped grooves matched with the second reinforcing steel bars are formed in the other two corresponding side surfaces of the bottom concrete slab; the multi-ribbed beam is arranged between the two cavity components. According to the utility model, bottom slurry leakage caused by upward floating in the concrete pouring process is avoided, and the quality problems of installation position deviation and the like are avoided due to mutual fixed connection between the cavity components.

The invention discloses a chemical flooding and encryption synergistic interaction in-situ reversing displacement experiment method. The method comprises the following steps that an experimental rock core is manufactured, manufacturing tools comprise a rock core holder body, a square-head pressing plug column and a flat-head bolt, a mixture of natural oil sand particles and resin adhesive is poured into a rock core square cavity, the square-head pressing plug column is inserted into the rock core square cavity, compaction is conducted, and the experimental rock core is manufactured; the core holder comprises a core holder body, a pressing ring, a sealing plunger and a rubber tube connector, the core is vacuumized to be saturated with water and oil and then placed in a core square cavity, the core is sealed and then subjected to a water drive or chemical drive direction-changing displacement experiment, displacement and pressure maintaining are conducted by closing a valve, and direction-changing displacement is achieved by opening and closing the valve; and then carrying out under-pressure nuclear magnetism or CT experiment test on the experimental rock core, and comparing the displacement effect before reversing, so as to demonstrate the chemical encryption synergistic interaction mechanism from the microcosmic use degree. According to the invention, the experimental error is reduced, and the displacement experiment effect is improved.

The invention discloses an earthen archaeological site repair rammed earth technological parameter measuring device which is characterized in that an earth outlet is located at one end of a square cavity by operating an earth paving device, earth paving is performed, after earth paving is completed, a compaction auxiliary device is moved to the position above a compaction mold, and the position of an earth ramming hammerhead adjuster is translated front, back, left and right; the ramming is carried out for different times until all the ramming operation is completed, the thickness and compactness of a soil layer compacted in the compaction mold are measured after the ramming is completed, and whether the thickness and compactness of the rammed soil layer corresponding to different soil paving thicknesses, different rammer weights and different ramming times according to the process meet the requirements or not is analyzed; compared with the prior art, the device has the advantages that the working efficiency is higher on the premise that the engineering quality is guaranteed during actual earthen site reinforcement, the earthen site reinforcement engineering design and construction are uniform through the soil paving thickness, the weight of the earth ramming hammer and the tamping times measured by the device, and incompatibility, quality defects and low efficiency caused by human experience factors are reduced as much as possible.

The utility model belongs to the technical field of pouring forming of test refractory bricks, and discloses a pouring forming mold for test refractory bricks, which is characterized in that a bottom plate is mounted at the bottom of a square cavity defined by a side plate I, a side plate II, a blocking plate I and a blocking plate II; screws are installed in the front and back corresponding fixing holes in the two ends of the first side plate and the two ends of the second side plate, and the first side plate, the second side plate, the first blocking plate, the second blocking plate and the bottom plate are fixed into a whole through screwing of nuts. The mold has the beneficial effects that through the arrangement of the bottom plates which can be detachably butted, the square cavity defined by the side plate I, the side plate II, the blocking plate I and the blocking plate II as well as the assembly and fixation of the screw and the nut, the smooth demolding of the test refractory brick body and the supporting column after the test refractory brick is poured and formed is ensured, and the production efficiency is improved. Damage to the supporting column due to unsmooth demolding is effectively prevented, and the pouring forming quality of the test refractory brick is improved.

The invention belongs to the field of film coating, and relates to an infrared film coating device for an outer cylindrical surface of a large-size cylindrical sample piece and a process method of the infrared film coating device. A vacuum cavity comprises a fan-shaped cavity body and a square cavity body, one end of the fan-shaped cavity body is closed, the other end of the fan-shaped cavity body is movably provided with a vacuum chamber door, a vacuumizing mechanism is communicated with the fan-shaped cavity body, a cylindrical workpiece frame is rotatably installed between the closed end of the fan-shaped cavity body and the vacuum chamber door, and the sample piece is arranged on the cylindrical workpiece frame in a sleeving mode. An evaporation source and a crystal control probe corresponding to the evaporation source are arranged on the inner wall of the square cavity in the length direction, a correction mechanism is arranged in the square cavity and comprises a pair of correction baffle frames which horizontally move in the length direction, and the correction baffle frames are located above the evaporation source. The invention further provides a process method of the infrared coating device for the outer cylindrical surface of the sample piece, and the evaporated film material can be uniformly deposited on the surface of the sample piece. According to the invention, the position of the sample entering the vacuum cavity is automatically and accurately controlled, and the evaporation source is monitored through the crystal control probe.

The utility model provides a wet process felt automatic leveling device, relates to leveling technical field, including the support plate, the top of support plate close to the centre is fixedly connected with the U-shaped plate, the inside of top inner wall of the U-shaped plate is provided with the rotating rod, the inside of top inner wall of the U-shaped plate close to both ends is provided with the square cavity, and the square cavity is connected with the rotating rod through the rotating rod. The two ends of the rotating rod penetrate through the inner wall of the square cavity and are rotationally connected with bearings of the rotating rod, and the positions, located in the square cavity, of the surface of the rotating rod are fixedly connected with first bevel gears in a sleeving mode. The first motor drives the second two-way screw rod to rotate, the second two-way screw rod rotates to drive the moving block to move, the moving block moves to drive the U-shaped moving plate to move, and the effect that the edge of a wet-method felt which is conveyed and leveled is embedded into the U-shaped moving plate can be achieved; therefore, the effect of limiting the wet-process felt in the conveying process can be achieved, and the effect of preventing the wet-process felt from shifting in the leveling process can be achieved.

The utility model discloses a test fixture for analyzing residual dust on the surface of an aluminum plate. The test fixture comprises a square cavity and push-pull assemblies symmetrically arranged on the square cavity, the push-pull assembly comprises a push-pull rod penetrating through the side face of the square cavity and a spring arranged on the push-pull rod in a sleeving mode. One end of the push-pull rod is arranged on the outer side of the square cavity, the other end of the push-pull rod is movably connected with the square cavity through the spring, and the spring is arranged in the square cavity. According to the utility model, a sample is clamped through the cooperation of the square cavity push-pull assembly, so that secondary pollution caused by dust remained on the surface of an aluminum plate in the analysis process can be prevented, analysis errors are avoided, and accurate experimental data are ensured to be obtained.