52 results about "Square cavity" patented technology

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 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 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 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 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 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 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 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.

The present invention discloses a refrigerator door, a refrigerator and an assembly method of a combination of injection molded parts and extruded parts, wherein in the refrigerator door, the upper end cover, the upper cover plate, the lower end cover and the lower cover plate are injection molded parts, and the side frame strips are extruded parts. The upper cover plate is detachably connected to the back side of the upper end cover, and the lower cover plate is detachably connected to the back side of the lower end cover. The upper frame assembly and the lower frame assembly are respectively detachably connected to the side frame strips on both sides through angle brackets at both ends. The insulating glass assembly is clamped in the square cavity, and the back sides of the upper cover plate and the lower cover plate are respectively provided with a first groove, and the two sides of the first groove are staggered along the length direction of the first groove with raised clips, and the back sides of the side frame strips are provided with a second groove, and the door seal strips are respectively detachably connected to the first groove and the second groove. The present invention adopts an assembly and matching structure of injection molded parts and extruded parts, which has the advantages of beautiful appearance, easy assembly, simple structure and stability. At the same time, it is convenient to install and disassemble the door seal strip, and no additional door seal strip fixing parts are required.

The utility model relates to the technical field of investment casting, in particular to an investment casting casting device which comprises a mounting cavity and two fixing plates, the two fixing plates are fixedly connected to the two ends of the mounting cavity respectively, two protruding plates are fixedly connected to the mounting cavity, knocking parts are mounted on the protruding plates, and the knocking parts are fixedly connected to the fixing plates. The knocking component comprises a V-shaped plate, a reciprocating screw rod, a square cavity and a cylinder, two first springs are fixedly connected to the protruding plate, a knocking rod is fixedly connected to the end, away from the protruding plate, of each first spring, and the knocking rod is arranged in a channel steel shape. The knocking rod moves upwards and resets under the elastic force of the first spring, at the moment, the knocking rod can collide with the outer wall of the fired mold in the upward moving process, the fired mold can vibrate, the vibrating effect on molten iron in the fired mold is achieved, and the molten iron can be better attached to the inner wall of the fired mold.

The present invention discloses an automatic winding device for a water bag, comprising a storage mechanism, which includes a mounting plate, a square cavity opened on the surface of the mounting plate, and a first mounting block fixedly connected to the top end of the mounting plate, a fixing buckle fixedly connected to the outer side of the first mounting block, an auxiliary wheel is provided on the outer side of the mounting plate, an infusion component is provided on one side of the mounting plate, and a pre-pressing component is provided on the inner side of the first mounting block; the device can not only spread out and fill the water bag with water, but also roll it up and drain it, effectively reducing the labor burden of the staff; and while spreading and filling water, a positioning rod can be inserted into the soil to ensure the stability of the overall operation of the device, and the positioning rod will not be pulled out from the soil until the work of rolling and draining is almost completed, thereby ensuring the stability of the device during the rolling work, greatly improving the practicality of the device.

This invention discloses a method for ensuring the coaxiality of a high-energy electron gun body, belonging to the field of high-energy electron guns. The method includes: (1) first assembling the flange connector, Kovar ring I, Kovar ring II, and ceramic tubing onto an argon arc welding fixture I, and then using argon arc welding to weld Kovar ring I to the flange connector and flange to obtain a flange ceramic assembly; (2) milling the installation reference surface after welding; (3) argon arc welding the square cavity weldment; (4) machining the square cavity weldment after welding; (5) ion beam welding the anode plate; (6) ion beam welding the square cavity weldment; (7) brazing the ceramic tubing to Kovar ring I and Kovar ring II. By rationally arranging the welding and milling processes using this method, the coaxiality of the gun body can be ensured, thereby improving the assembly accuracy of the high-energy electron gun and the performance of the electron beam. This invention provides a method for the processing and manufacturing of a high-energy electron gun body, and this method also has guiding significance for the production and manufacturing of electron guns.

The invention relates to the technical field of building vibration isolation, in particular to a waste rubber particle filling type vibration isolation trench which comprises a trench body and a concrete layer arranged in the trench body, a bottom plate is arranged in the concrete layer, a sliding table is arranged in the bottom plate in a sliding mode, and multiple sets of H-shaped plates and cover plates are installed at the top end of the sliding table; the two H-shaped plates are connected to form a square cavity, the square cavity is filled with rubber particles, and a buffering mechanism is arranged in the bottom plate. Friction can be generated due to relative movement between the rubber particles, and meanwhile, contact friction can be generated between the rubber particles and the inner wall of the square cavity; the friction effect and momentum exchange among the rubber particles can gradually convert kinetic energy transmitted by vibration into heat energy and other forms of energy and dissipate the energy, so that the defect that the buffering capacity of the rubber particles is insufficient when the rubber particles deal with large-amplitude vibration is effectively overcome, and efficient buffering and dissipation of vibration energy are achieved.

The present invention relates to the field of diode application technology, and in particular provides a diode packaging structure, comprising a bottom cabin, wherein a hinged hinge is installed at the left end of the bottom cabin, and a hatch cover is connected to the top of the bottom cabin via the hinged hinge. A packaging assembly is provided in the inner cavity of the bottom cabin, and the shape of the hatch cover matches the bottom cabin. When the hatch cover is rotated downward, the packaging assembly is covered in the bottom cabin. The packaging assembly includes four positioning seats fixed in the bottom cabin, and the four positioning seats are distributed in a quadrilateral in the square cavity of the bottom cabin. The same-pole pins of the diodes are quickly connected together by this means, replacing the existing welding means, and do not require the auxiliary operation of a welding gun. In addition, this crimping method also facilitates the future maintenance of the rectifier bridge. The diodes are covered in the bottom cabin by the hatch cover, so that the rectifier bridge is in a separate space, which is much better than the existing self-made rectifier bridge.

The present application belongs to the technical field of casting mold, and particularly relates to a square cavity casting mold. The square cavity casting mold comprises a mold body and supporting legs for supporting the mold body. The mold body comprises horizontally and intervally arranged first and second vertical mold plates. An outer mold cylinder and an inner mold cylinder are assembled between the first and second vertical mold plates. The first and second vertical mold plates, the outer mold cylinder and the inner mold cylinder cooperatively form an annular cavity. The first and second vertical mold plates are square in structure. The first and second vertical mold plates are fixed on the supporting legs in a manner that two opposite top vertices of the first and second vertical mold plates are vertically arranged and the connecting line is perpendicular to the horizontal plane. At least one of the first and second vertical mold plates is provided with a protrusion for forming a sealing groove. At least one of the first and second vertical mold plates is assembled with a threaded part for fixing a metal threaded insert. The top of the mold body is provided with a mold gate at the top vertex of the uppermost end. The mold gate is communicated with the cavity. The present application solves the problems of air holes and uneven bottom of the sealing groove caused by the existing casting method.

The utility model belongs to the technical field of quick replacement devices, and discloses an aluminum profile extrusion die quick replacement device which comprises a positioning body, a square cavity rectangular groove is formed in the positioning body, a fixing device is fixedly arranged in the square cavity rectangular groove, and second sliding rail grooves are formed in the two sides of the upper end face and the lower end face of the square cavity rectangular groove. A first sliding rail is fixedly arranged in the second sliding rail groove, first sliding blocks are arranged on the two sides of the first sliding rail in a sliding mode, a moving plate is fixedly arranged at one end of each first sliding block, a grinding tool body is fixedly arranged on the inner side of the moving plate, and through the first sliding rail, the moving plate, the sliding rail groove and the sliding blocks, a heavy grinding tool is simplified, the shutdown time is shortened, and cost expenditure is reduced; the risk that the grinding tool is smashed when replaced is reduced, much time is not wasted, the production efficiency is improved, and the service life of the grinding tool is prolonged.

The invention discloses an electric hoist box body, a die and a machining process thereof, and relates to the technical field of die-casting dies. The device comprises a shell, two partition plates are arranged in the middle of the shell, a middle cavity with an opening facing the outer side is formed between the two partition plates, and a shallow inlet cavity and a deep inlet cavity are formed between the two opposite sides of the partition plates and the shell respectively; and the rotating shaft mounting part comprises a square cavity and a round cavity which are constructed in the deep cavity, a first shaft pipe which protrudes outwards is constructed in the square cavity, and a plurality of second shaft pipes which are consistent with the protruding direction of the first shaft pipe are constructed in the round cavity. The lugs are arranged on the side faces of the box body of the electric hoist, the side faces of the box body of the electric hoist are arranged on the upper side and the lower side of the die during die casting, bubbles can float upwards during material injection and filling, accordingly, the bubbles are gathered at the lugs, waste materials at the lugs are cut off through operations such as finish machining and deburring after follow-up cooling forming, and the production efficiency is improved. Therefore, the whole product has no or few pores and bubbles.

The application provides an ultrathin heat-insulating door body and a refrigerator, relates to the technical field of refrigerator door bodies, and the ultrathin heat-insulating door body comprises an outer shell, a door barrel, a vacuum heat-insulating plate and a door body sealing strip, the middle part of the second end of the outer shell is provided with a through groove in communication with a cavity, the outer end of the door barrel is fixedly connected with the inner wall of the outer shell, the outer wall of one side of the door barrel and the first side inner wall of the outer shell form a square cavity, the outer side of the outer wall of the other side of the door barrel and the second side inner wall of the outer shell form a back-shaped insertion groove, the vacuum heat-insulating plate is arranged in the square cavity, and the door body sealing strip is inserted with the back-shaped insertion groove. The ultrathin heat-insulating door body provided by the application only uses the vacuum heat-insulating plate as a heat-insulating material, is favorable for improving the heat-insulating performance of the door body, the door body is relatively thin, the appearance impact force is relatively large, and the floor area of the refrigerator can be reduced.

The utility model provides a reinforcing mechanism for a flood control plate of a water conservancy flood control project, which relates to the technical field of flood control articles and comprises a flood control plate body, a square cavity is arranged inside the flood control plate body, mounting grooves which are symmetrically distributed are arranged on the inner bottom wall of the square cavity, and fixing columns are slidably sleeved on the inner walls of the mounting grooves. A first threaded rod is installed on the inner bottom wall of the square cavity through a bearing, one end of the first threaded rod penetrates through and extends to the upper surface of the flood prevention plate body, and one end of the first threaded rod is fixedly connected with a first rotating disc. And besides depending on the connection and fixation of the two adjacent flood prevention plates, the flood prevention plates can be fixed through the fixing columns and the expansion anchors of the flood prevention plates, so that the relative positions of the flood prevention plates and the ground are kept, and the reliability is higher.