8 results about "Medium density" patented technology

The present application relates to the technical field of dry separation, and discloses a multi-target integrated optimization method of a large-scale low-cost dry separation system, which comprises the following steps: analyzing material parameters, determining an initial air supply amount of a to-be-monitored separator and an initial air supply proportion of a separation area based on the analysis result; judging whether to adjust the initial air supply amount according to historical separation records; when it is determined to adjust the initial air supply amount, adjusting the initial air supply amount based on a real-time bed thickness and a medium density in the bed, and obtaining a final air supply amount; judging whether to adjust the initial air supply proportion according to a real-time material feeding amount; and when it is determined to adjust the initial air supply proportion, adjusting the initial air supply proportion based on a partition pressure drop and a real-time separation effect index, and obtaining a final air supply proportion. The present application can reasonably adjust air supply for materials with different particle sizes and water contents, realize efficient separation, and make product quality stable and reliable.

The utility model relates to a steel-wood composite door which comprises a door frame, back-flap hinges and a door leaf. The door leaf is connected with the door leaf through the back-flap hinge, and the door leaf comprises a door leaf steel core formed by fixedly connecting a back galvanized steel plate and a front galvanized steel plate; a cavity is formed in the middle of the door leaf steel core and used for installing a perlite fireproof plate. The outer sides of the back galvanized steel sheet and the front galvanized steel sheet are provided with mould pressing medium fiber density boards which are matched with stainless steel profiles to be fixedly connected with sealing edges. The utility model has the beneficial effects that a wood framework is omitted, steel plate cutting materials are reduced, the steel plate utilization rate is increased, the operation of workers is more convenient, and the strength is high. Meanwhile, force is applied to the front wood veneer and the rear wood veneer which are fixed on the door leaf steel core, and then the front wood veneer and the rear wood veneer are fixed on the periphery of the door leaf steel core through self-tapping screws, so that the steel sealing edges are firmer. The steel sealing edge is more durable than a wood sealing edge, is not easy to deform and fall off, is more convenient to mount than a wood veneer, and is suitable for standardized production in the door industry.

The invention relates to a double belt press for producing wood-based panels, in particular medium density fiber boards, having a first endless belt and a second endless belt, the first endless belt being guided around two guide rollers and the second belt being guided around two guide rollers, wherein the first endless belt is arranged at least sectionally above the second endless belt, and wherein a product gap is defined between a descending section of the first belt and an ascending section of the second belt; and having a plurality of spray nozzles for applying a release agent to the first belt and / or the second belt, wherein the spray nozzles are two-substance spray nozzles for generating a spray of the release agent by using compressed air.

This invention discloses a multi-temperature, multi-frequency measurement method for unattended testing of materials under test. This invention relates to the field of materials measurement technology and solves the problem that using a single frequency point for signal measurement in practical processing can lead to significant measurement accuracy errors. Through innovative in-depth analysis of scattered signal waves, and based on the regular characteristics of scattered signal waves when the internal medium density of the material is uniform and stable, this invention can accurately identify the optimal frequency point under different ambient temperatures. Compared to traditional fixed-frequency or blindly trial-and-error measurement methods, this method, based on feedback from the material's own characteristics, greatly improves the targeting of the measurement, making the subsequent acquisition of S-parameter data more accurate and providing a solid foundation for the precise analysis of the material's electromagnetic properties.

The utility model relates to the field of medium density fiberboards, in particular to a medium density fiberboard feeding device which comprises two bottom plates, supporting columns are welded to the centers of the outer walls of the tops of the two bottom plates, supporting grooves are formed in the centers of the outer walls of the sides, close to each other, of the supporting columns, and supporting screw rods are rotationally connected to the centers of the supporting grooves. The outer wall of the supporting screw rod is in threaded connection with a supporting block, extension rods are installed on the outer wall of the top of the supporting block, a placing plate is welded to the outer walls of the sides, close to each other, of the extension rods, and a pushing assembly is arranged at the top of the placing plate. The material pushing assembly comprises a material pushing groove formed in the center of the top of the containing plate and a material pushing screw rotationally connected to the center of the material pushing groove. The supporting motor drives the supporting block and the placing plate to ascend through rotation of the supporting screw rod, the material pushing motor drives the material pushing screw rod to rotate, the material pushing screw rod drives the transverse rod to move on the placing plate, continuous use is facilitated, continuous plate conveying is facilitated, and the fatigue degree of workers is conveniently reduced.

This invention relates to a density control method and system for a heavy medium separation process. The method includes: inputting the actual density of the dilute medium to a dilute medium density controller and outputting a set dilute medium level; controlling the dilute medium tank level to reach the set dilute medium level to ensure the dilute medium tank density is within a preset range; inputting the set dilute medium level and the actual dilute medium level to a dilute medium level controller and outputting the opening degree of a dilute medium water supply valve; controlling the opening degree of the dilute medium water supply valve to reach the set dilute medium level; inputting the set desliming flow rate and the actual desliming flow rate to a desliming flow rate controller and outputting the opening degree of a desliming water supply valve; controlling the opening degree of the desliming water supply valve to reach the set desliming flow rate; and inputting the set combined medium density and the actual combined medium density to a combined medium density intelligent controller and outputting the opening degree of a combined medium diversion valve; controlling the opening degree of the combined medium diversion valve to reach the set combined medium density. Its advantage is that it replaces traditional manual operation and achieves precise adjustment of the combined medium density under complex working conditions.

The invention provides a multi-rate hierarchical learning control method for a dense medium coal preparation process under unreliable communication. The method comprises the following steps: step 1, carrying out system screening and processing on historical operation data; 2, a basic loop controller is designed through model predictive control; step 3, constructing a heavy medium coal preparation whole process generalized controlled object containing two layers of dynamic characteristics; 4, performing optimization solution on the set value gain of the dense medium suspension liquid density control loop; and 5, updating the weight parameter of the performance index of the operation layer by using the operation data generated by the controlled system online, substituting the updated weight parameter into the step 4 again, and circularly executing the step 4 and the step 5 until a set value meeting an optimization target is obtained. According to the method, a data-driven performance index weight parameter setting and dense medium density optimal set value optimization solving method is designed, so that the optimal dense medium separation effect is obtained, and the method has very important significance for improving the economic benefits of a coal preparation plant.

The invention relates to the technical field of dry separation, and discloses a multi-objective integrated optimization method for a large-scale low-cost dry separation system, which comprises the following steps: analyzing material parameters, and determining the initial air supply quantity of a separator to be monitored and the initial air supply proportion of a separation area based on an analysis result; whether the initial air supply amount is adjusted or not is judged according to the historical sorting record; when it is judged that the initial air supply amount is adjusted, the initial air supply amount is adjusted based on the real-time thickness of the bed layer and the medium density in the bed layer, and the final air supply amount is obtained; whether the initial air supply proportion is adjusted or not is judged according to the real-time material feeding amount; and when it is judged that the initial air supply proportion is adjusted, the initial air supply proportion is adjusted based on the partition pressure drop and the real-time sorting effect index, and the final air supply proportion is obtained. Air supply is reasonably adjusted for materials with different granularities and water contents, efficient separation is achieved, and the product quality is stable and reliable.