24 results about "Dry sand" patented technology

The embodiment of the application provides a machine tool base, which comprises a base shell and resin concrete filled into the base shell, the resin concrete comprises raw materials with the following mass percentages: aggregate 70%-85%, filler 5%-15%, and cementing material 5%-20%, wherein the aggregate comprises dry sand and stone, the dry sand accounts for 10%-20% of the total mass of the aggregate, the stone accounts for 80%-90% of the total mass of the aggregate, the stone comprises at least three kinds of stone with different particle sizes, the dry sand comprises: dry sand with a particle size of 0.074-0.106 mm, accounting for 72%-78% of the total mass of the dry sand; dry sand with a particle size of 0.053-0.074 mm, accounting for 20%-25% of the total mass of the dry sand; and dry sand with a particle size less than 0.053 mm, accounting for 1%-3% of the total mass of the dry sand. The machine tool base manufactured by the scheme of the application can greatly improve the compressive strength of the machine tool base.

The utility model discloses a dry state sand shoots sand leakage prevention automatic plugging device, including sand shooting board, a plurality of shoots are fixedly arranged on sand shooting board, sand shooting board top is provided with sand baffle, sand baffle is fixedly connected sand baffle column, sand baffle top is fixedly connected jacks, and jacks lower extreme extends to the downside of sand shooting board, and the upside of sand shooting board is fixedly provided with reset rod, and spring connection sand baffle is seted up on reset rod, and sand baffle is pressed under the action of spring force and makes sand baffle column to press tightly the sand outlet of shoot, and when shooting, the upside of upper core box abuts against the lower extreme of jacks, makes sand baffle and sand baffle column synchronous up -and -down open the sand outlet of shoot. The device utilizes jacks and upper core box linkage control sand baffle's lifting action, and sand baffle column falls back automatically after shooting, and tightly closes shoot, prevents sand from continuing to leak effectively, improves the on -the -spot cleanliness and equipment life.

The application discloses a magnesium alloy anti-oxidation heat treatment process, and particularly relates to the technical field of metal material heat treatment. The process comprises the following steps: mixing dry sand with a specific proportion of composite flame retardant to prepare a flame-retardant sand mold mixture; placing a magnesium alloy casting in a heat-resistant container, completely covering and vibrating the magnesium alloy casting with the mixture; and then performing programmed heat treatment in a conventional heat treatment furnace. During the high-temperature holding stage, the mixture is subjected to controllable sintering hardening, and the formed hardened sand body forms a protective layer on the surface of the casting to isolate oxidation through the synergistic effect of fluorine, sulfur, boron and other components in the sand body; on the other hand, the hardened sand body provides rigid physical support for the casting in a high-temperature softened state to prevent deformation. After the heat treatment is completed, the casting and the sand mold are separated through vibration. The process has the advantages of reliable anti-oxidation, effective anti-deformation, low cost and compatibility with conventional equipment, and is suitable for the heat treatment of magnesium alloy castings such as ZM5 and ZM6.

This utility model relates to the field of beach cleaning technology, and in particular to a beach garbage cleaning vehicle. The vehicle includes a structural frame and, sequentially, a sand-lifting component, a transport component, a separation component, and a storage component installed on its top surface. The sand-lifting component scoops up a first mixture containing garbage and sand from the beach and delivers it to the transport component. The transport component conveys the first mixture to the separation component. The separation component includes a first separation assembly, a drying assembly, and a second separation assembly. The first separation assembly receives the mixture, separates the outer layer of dry sand, and then delivers the second mixture containing the inner layer of wet sand and garbage to the second separation assembly. The drying assembly dries the inner layer of wet sand during the first separation process, transforming it into easily separable dry sand, and separates a portion of the dried inner layer of wet sand through the first separation assembly. The second separation assembly further separates the dried inner layer of wet sand and delivers the separated garbage to the storage component for storage, thereby reducing the sand content of the garbage.

This invention discloses an automatic mortar proportioning and stabilization mixing control method based on online moisture content detection, relating to the field of mortar production and proportioning control technology. The method first performs online moisture content detection on the wet sand entering the mixing system. Based on the real-time moisture content data, the wet sand feed amount is converted into an absolute dry sand baseline amount, and the target total water consumption, the initial planned water addition, and the reserved correction water amount are determined in conjunction with a preset mortar masterbatch formula. Then, the first water addition and mixing are performed. During the initial discharge stage, the state parameters of the first wave of material are collected within a preset first-wave material verification window and compared with a preset target range. When the state parameters of the first wave of material are lower than the preset target range, a limited secondary water addition is performed, and mixing continues until the stabilization endpoint is reached, at which point the finished mortar is output. This invention can improve the mortar proportioning accuracy, discharge continuity, and batch consistency under fluctuating wet sand conditions.

The application relates to a moisture content control method of a dry sand making building, belonging to the field of machine-made sand, which comprises the following steps: obtaining the moisture content of raw materials, performing corresponding treatment according to the moisture content of the raw materials to obtain qualified raw materials in terms of the moisture content; making the qualified raw materials into primary crushed sand; obtaining the moisture content of the primary crushed sand, performing corresponding treatment according to the moisture content of the primary crushed sand to obtain qualified finished sand in terms of the moisture content; and performing pretreatment on the finished sand before storage and transportation based on the weather condition in the current period and a future period. Beneficial technical effects: the moisture content control method of the dry sand making building can dynamically adjust sand making process parameters according to multi-dimensional parameters such as the moisture content of raw materials, the moisture content of primary crushed sand and environmental weather, and effectively adapt to production requirements under different raw material conditions and different environmental humidity.

This utility model relates to the technical field of hydraulic aggregate preparation systems, specifically to a multi-mode adjustable hydraulic aggregate preparation system. The system includes a coarse crushing mechanism, a dual-mold medium crushing mechanism, a primary screening component, a secondary screening component, a sand making and shaping mechanism, a sand washing mechanism, a sand making mechanism, large stone finished product bins, medium stone finished product bins, small stone finished product bins, a dry sand bin, and a wet sand bin. The coarse crushing mechanism is connected to the dual-mold medium crushing mechanism; the dual-mold medium crushing mechanism is connected to the primary screening component; in the primary screening component, its oversized stone outlet is connected to the dual-mold medium crushing mechanism, its first large stone outlet is connected to the large stone finished product bin or to the dual-mold medium crushing mechanism, its second outlet is connected to the sand making and shaping mechanism, and its third outlet is connected to the sand washing mechanism; the sand making and shaping mechanism is connected to the secondary screening component; the first dry sand outlet of the sand making mechanism is connected to the dry sand bin, while its diversion outlet is connected to the sand washing mechanism. The system has a multi-mode adjustment function.

This invention discloses a fully automated finished stone material preparation system and its production process, belonging to the field of building material preparation technology. The system adopts a factory-style assembly line layout, sequentially including: a raw material crushing and shaping unit, a sand making and grading unit, a finished product sorting and storage unit, a dust collection and stone powder recovery unit, a material circulation and buffer unit, a resource-based packaging unit, and a central intelligent control unit. The finished product sorting and storage unit is equipped with parallel and independently conveying No. 1 and No. 2 finished product belts, a gravel finished product belt, and a dry sand finished product belt; the dust collection unit includes a dust collector network, a stone powder silo, and a dust hopper; the resource-based packaging unit directly or in combination with other materials forms bagged products from stone powder. This invention integrates aggregate shaping, dry sand making, full stone powder recovery, and compounding and packaging processes, achieving material balance and adaptive quality adjustment through intelligent control. It produces no process wastewater, achieves 100% stone powder utilization, and maintains a dust emission concentration ≤8mg / m³, realizing green, efficient, and intelligent production.

This invention relates to the field of casting molding technology and discloses a foam model gasification control process in lost foam casting. The process includes: collecting real-time pressure and ambient negative pressure along the suction path within the sand box; determining the sand layer permeability resistance coefficient based on the pressure difference and filling distance; determining the set pressure of the target suction path based on the model's characteristic length; controlling the output pulse of the target suction path to enhance negative pressure as the filling front approaches; and adjusting the opening of the gate valve in the casting pouring channel to reduce the rising speed of the molten metal when the permeability resistance coefficient exceeds a threshold. This invention achieves multi-loop spatial coordinated adjustment of the negative pressure amplitude and filling speed, ensuring that the negative pressure flow resistance field matches the gasification release distribution, eliminating localized air gap blockage, enabling directional and rapid gas discharge, maintaining the stability of the dry sand mold wall, and preventing air entrapment and box collapse in the casting.

This utility model relates to the field of pipeline installation technology and proposes a steel sand bucket support platform for pipeline installation, comprising: a sand bucket containing dry sand, a support platform with its bottom located inside the sand bucket, two lifting devices symmetrically arranged on both sides of the sand bucket, and a vertical guide device on the outer wall of the sand bucket. The support platform consists of a support base with a closed cavity and an arc-shaped support platform with a rubber pad on top, the arc surface matching the outer diameter of the pipeline. The lifting device includes a strut, a pressure rod, and a telescopic handle. One end of the strut is hinged to the bottom of the arc-shaped support platform, one end of the pressure rod is hinged to the unused end of the strut, the unused end of the pressure rod is fixedly connected to the telescopic handle, and the middle section of the pressure rod is rotatably connected to the sand bucket. When the pressure rod is pressed down, the support platform is lifted through leverage. Sand guide holes with sand-blocking bolts are provided on the side wall of the sand bucket. This device can adjust the support height, and the support platform can be quickly lowered after sand discharge, allowing for rapid transfer to the next work section, thus improving the stability and efficiency of temporary pipeline support.

This invention belongs to the field of metal material preparation technology, and relates to a Cr-containing steel and its preparation process. Through composition adjustment and heat treatment process improvement, a Cr-containing steel with a microstructure consisting of a matrix phase with a volume fraction of 75%-85% and a reinforcing phase with a volume fraction of 15%-25% is prepared. The overall hardness value of the Cr-containing steel is ≥50HRC. According to GB / T 229-2020 standard, the average impact absorption energy of a 10mm×10mm×55mm Charpy V-notch specimen in an impact test at a low temperature of -20℃ is ≥55 J. According to ASTM G65-A standard, the wear resistance is tested using a dry sand / rubber wheel abrasive wear tester, and the wear weight loss under standard test conditions is ≤30 mg.

This invention discloses a three-layer substrate cultivation method for vegetables in a solar greenhouse, belonging to the field of soilless cultivation technology in facility agriculture. The method includes: constructing a trapezoidal ridge group in the solar greenhouse, and laying a rock wool water-retaining layer, an organic substrate cultivation layer, and a washed river sand temperature-regulating layer in sequence from bottom to top on the ridge. After setting up a drip irrigation system, the moisture content of the sand layer is controlled in winter, and the high thermal conductivity of the wet sand is used to absorb solar radiation heat and release it at night to increase the temperature. In summer, the moisture content of the sand layer is reduced, and the low thermal conductivity of the dry sand is used to block the high temperature from being conducted to the root zone. This method solves the technical problems of difficult troughing in solar greenhouses, difficulty in water and fertilizer retention, large water and fertilizer evaporation, and uneven water and fertilizer supply affecting product quality.

The utility model provides an evanescent mode large flat plate type casting anti-deformation tool and a sand box for a casting mold, and the evanescent mode large flat plate type casting anti-deformation tool is arranged in the sand box and comprises two supporting pipes and a plurality of connecting pipes; the two supporting pipes are arranged in the sand box in parallel, and the supporting pipes are vertically arranged; the multiple connecting pipes are arranged at intervals in the vertical direction, the two ends of each connecting pipe are attached to and fixedly connected with the peripheral faces of the two supporting pipes respectively, the pipe body positioning faces of the multiple connecting pipes abut against the same side of a mold, and the multiple connecting pipes are matched to form a main body positioning face. According to the anti-deformation tool for the evanescent mode large flat plate type casting, the supporting pipes are arranged in the sand box, the connecting pipes are installed on the same side faces of the two supporting pipes, the multiple connecting pipes jointly form a main body positioning face, the main body positioning face is matched with filled dry sand to horizontally position a casting mold, and the casting quality of a cast iron flat plate is guaranteed.

The utility model relates to a dry and wet multi -layer combined electric screen, include: support seat, hopper, be equipped with a plurality of damping spring between it and support seat, install vibration pump on the hopper, vibrating screen, with the hopper intercommunication, vibration pump is used for driving vibrating screen vibration, cover plate, be equipped with a plurality of tension spring between it and hopper, inlet pipe, one end is connected water pump or air compressor, vibrating screen is used for screening dry sand dust time inlet pipe connects air compressor, air compressor is used for the compressed air into vibrating screen, vibrating screen is used for screening wet sand dust time inlet pipe connects water pump, water pump is used for the water flow into vibrating screen, air compressor is used for the vibrating screen after the air -drying wet screen through inlet pipe. The utility model discloses a dry and wet multi -layer combined electric screen, the top of screen increases the air inlet pipe or water inlet pipe, makes the sand screening equipment can dry screen and can wet screen, inlet pipe can enter the air and can enter the water, and the medium that enters can improve the effect of sand dust passing through the screen.

The application discloses an intelligent identification method and device for distinguishing dry sand from wet sand by using multispectral data, and belongs to the technical field of remote sensing monitoring, and comprises the following steps: acquiring a geometric distortion coefficient based on an instantaneous field of view angle of imaging, resolution and ground surface wind speed; acquiring a background heterogeneity coefficient based on the bulk density of sand surface, porosity and salinity; acquiring a surface pollution coefficient based on the coverage rate of algal and microbial film and the coverage degree of coexisting impurities; further combining atmospheric aerosol optical thickness, sand particle size median value and volume percentage of main mineral components to construct an atmosphere-particle-component matching model and acquire matching parameters; and finally, acquiring the target effective spectral channel number by a channel optimization model based on the matching parameters, the current effective spectral channel number and the background heterogeneity coefficient. The application realizes the fusion evaluation of multi-source influencing factors through multi-level system modeling, and significantly improves the precision and environmental adaptability of dry and wet sand identification.

This utility model relates to a mold for preventing deformation of rectangular castings, belonging to the technical field of rectangular casting molds. It includes an installation platform, with a limiting frame fixedly installed on the top of the platform. A wooden mold is placed inside the limiting frame, and a lost foam casting is placed inside the wooden mold. A casting pipe is placed inside the wooden mold, and an anti-deformation component is installed inside the wooden mold. The anti-deformation component includes a control screw rotatably mounted on the inner wall of the wooden mold. Two inner pressure plates are threadedly connected to the surface of the control screw, and two outer pressure plates are threadedly connected to the surface of the control screw. This mold for preventing deformation of rectangular castings, by setting the anti-deformation component inside the wooden mold, places the lost foam casting between the inner and outer pressure plates. By rotating the control screw, the inner and outer pressure plates move synchronously, compacting the dry sand and increasing its density, thus preventing deformation of the rectangular casting.

This invention discloses a wet-mixed mortar for plastering robots, prepared by mixing a dry mixture of wet-mixed mortar with water. The dry mixture consists of the following raw materials: 114-132 parts cement; 211-223 parts dry sand; 464-495 parts manufactured sand; 38-44 parts fly ash; 12-16 parts slag; 1-1.7 parts polyhydroxycarboxylic acid salt; 0.8-1 part branched alkylbenzene sulfonate; 0.7-0.8 parts polycarboxylic acid; 0.3-0.5 parts air-entraining agent; 0.5-0.7 parts dispersant; and 0.1-0.4 parts retarder. The wet-mixed mortar of this invention exhibits good stability and uniformity, significantly extending the open time during transportation and waiting periods. After application to the wall, it promptly triggers hydration and normal setting and hardening, balancing the open time requirements for long-distance transportation with the time constraints of plastering operations. This fully ensures the continuity, reliability, and efficiency of automated construction by the plastering robot.

The utility model discloses an iron pellet modeling device for on -vehicle valve casting production relates to on -vehicle valve casting production field, specifically is an iron pellet modeling device for on -vehicle valve casting production, including outer sand box, a plurality of modeling box for on -vehicle valve shell iron pellet modeling and the support for placing outer sand box, be equipped with a plurality of baffle on the outer sand box, a plurality of baffle divide outer sand box into a plurality of space for dry sand, be equipped with the feed pipe for iron pellet delivery on the modeling box, be equipped with vibration subassembly on the support, the utility model solves the present on -vehicle valve shell surface treatment and the modeling mode of many insufficiency that exist, part technology adopts manual polishing or simple mechanical treatment, and the efficiency is low and difficult to guarantee the consistency of surface roughness, leads to the poor adhesion of subsequent coating, and easy to appear the phenomenon of peeling, some adopt the process of shot blasting treatment, and the equipment structure is complex, and inconvenient operation, and can not realize the problem of batch processing.

The application provides a sand box vibration device and method based on V-method casting, relates to the technical field of sand box vibration devices, and also relates to a sand box vibration method. The sand box vibration device comprises a sand spraying device, a conveying track arranged at the bottom of the sand spraying device, a conveying mechanism capable of moving on the conveying track, a vibration mechanism arranged at the top of the conveying mechanism, and a placing mechanism arranged at the top of the vibration mechanism. The upper end surface of the placing mechanism is provided with a sand box for storing dry sand. The conveying mechanism comprises a track trolley. The top of the track trolley is fixed with a spherical rubber support seat for supporting the vibration mechanism. The vibration mechanism comprises a box body fixed at the top of the spherical rubber support seat. A rack is fixed at the central position in the box body. A second servo motor is horizontally fixed on the rack. The sand box vibration amplitude can be adjusted, and the vibration amplitude of the placing mechanism cannot be adjusted.

The utility model discloses a mobile mortar mixing station installed in a container relates to mortar mixing field, it includes container, mixing system, electrical control cabinet, dust remover, and mixing system sets up in container inside, and mixing system includes dry sand feeding system, cement feeding system, additive feeding system, high -speed mixing machine, discharge system, two valve bag packaging machines, and dry sand feeding system, cement feeding system, additive feeding system are used to feed to high -speed mixing machine, and discharge system is used to shift finished product mortar from high -speed mixing machine to valve bag packaging machine, and valve bag packaging machine is used for packing mortar finished product, and the application has saved the construction cost and time of mixing station, makes mixing station to follow engineering project nearby supply, plays the effect of reuse.

The application discloses a manganese-iron alloy dry slag treatment system and a treatment method thereof. The dry slag treatment system comprises a stock bin, a first crushing device, a spiral classifier, a shaking table, a jigging machine, a sand washer and a wastewater treatment device. After being crushed by the first crushing device, the manganese-iron alloy dry slag enters the spiral classifier for classification. The coarse particles after classification enter the jigging machine for screening, and the fine particles enter the shaking table for screening. The concentrates selected by the jigging machine and the shaking table enter the concentrate pool of the stock bin for recycling. The coarse particle tailings screened by the jigging machine are cleaned by the sand washer, then conveyed back to the stock bin for secondary treatment. The fine slag and wastewater washed out by the sand washer and the fine slag and wastewater discharged by the shaking table enter the wastewater treatment device for pressure filtration, and then dry sand is obtained for external sale. The manganese-iron alloy dry slag treated by the treatment method of the application does not need to consume a large amount of water resources for water quenching, and the comprehensive utilization rate and comprehensive economic benefits of the manganese-iron alloy dry slag can be effectively improved, and the production cost is reduced.