JUSTIFICATION OF THE PARAMETERS OF THE SEALED INSERT OF A SOFT CONTAINER DURING STORAGE OF THE FOOD IN THE MEDIUM OF CARBON GAS

Проблема и цель. На протяжении многих лет перед человечеством встает вопрос о выборе правильных способов длительного хранения зерновых культур, используемых в животноводстве. Это относится и к хранению комбинированных кормов. Был разработан способ упаковки комбинированных кормов в среде углекислого газа. Цель – ограничение взаимодействия комбикорма с атмосферным воздухом. Методология. Загрузку комбикорма в мягкий контейнер с вкладышем осуществляют с помощью устройства для затаривания комбикорма. Мягкий контейнер устанавливают в кассету, стенки которой закрывают и фиксируют с помощью замков. Комбикорм загружают с одновременной подачей углекислого газа иглой-инъектором, по мере загрузки мягкого контейнера комбикормом иглу-инъектор направляют в различные части контейнера с целью равномерного распределения углекислого газа внутри контейнера. Благодаря значительной молярной массе углекислого газа происходит вытеснение воздуха, в том числе и кислорода, из загружаемого контейнера. Для уменьшения окисления комбикорма осуществляют сжатие контейнера снизу при помощи пневматических домкратов, смонтированных на днище кассеты. Кассету выкатывают из устройства загрузки, открывают ее стенки и с помощью погрузчика контейнер с комбикормом на поддоне извлекают, транспортируя к месту хранения. Результаты. На процесс диффузии углекислого газа влияет также давление внутри и снаружи герметичного контейнера, однако время хранения имеет небольшую значимость. Толщина пленки напрямую влияет на способность удерживать давление комбикорма, возникающее при сжатии мягкого контейнера пневматическими домкратами. Наибольшие напряжения обычно возникают в местах изгиба, когда радиус кривизны уменьшается. Такие зоны расположены по ребрам контейнера и особенно в углах. Заключение. Моделирование параметров пленки позволило установить, что для обеспечения необходимой прочности следует применять полиэтиленовую пленку ГОСТ 16338-85 толщиной 150 мкм. Problem and purpose. For many years, mankind has been faced with the question of choosing the right methods for long-term storage of grain crops used in animal husbandry. This also applies to the storage of compound feed. A method has been developed for packaging combined feed in a carbon dioxide environment. The goal is to limit the interaction of compound feed with atmospheric air. Methodology. The feed is loaded into a soft container with an insert using a feed filling device. The soft container is installed in a cassette, the walls of which are closed and fixed to each other with locks. The compound feed is loaded with the simultaneous supply of carbon dioxide by the needle-injector; as the soft container is loaded with compound feed, the needle-injector is directed to various parts of the container in order to evenly distribute carbon dioxide inside the container. Due to the significant molar mass of carbon dioxide, air, including oxygen, is displaced from the loaded container. To reduce the oxidation of the compound feed, the container is compressed from the bottom using pneumatic jacks mounted on the bottom of the cassette. The cassette is rolled out of the loading device, its walls are opened and, using a loader, the container with the compound feed on the pallet is removed and transported to the storage location. Results. The carbon dioxide diffusion process is also pressured inside and outside the sealed container, but storage time is of little importance. Film thickness directly affects the ability to hold the feed pressure that occurs when the flexible container is compressed with pneumatic jacks. The greatest stresses usually occur at bending points when the radius of curvature decreases. Such areas are located along the edges of the container and especially in the corners. Conclusion. Modeling the parameters of the film made it possible to establish that to ensure the required strength, a polyethylene film GOST 16338-85 with a thickness of 150 μm should be used.

Research on Design and Operation Method of Dewater and Filled System for Cushion Pool of High Dams ——Taking the project of BHT hydropower plant in China as an example

Dam is set in large hydropower station. Cushion pool is built behind the dam for the flood discharge and energy dissipation of the reservoir. Operation of flood discharge and energy dissipation for some time, Cushion pool is dewatering and structure safety of which is study, then cushion pool is filled. Temporary dewater and filled system is used by previous engineer, but is arranged and controlled hard. Based on need of the cushion pool dewatering and filling, for an example of Baihetan hydropower station, necessity and feasibility are study. Then a permanent dewatering and filling system is designed for cushion pool. Design principle and arrange method are described. Many technical difficulties are study and resolved such as effect of valley deformation on the control system of dewatering and filling, demand of dewatering and filling device parameter, performance quota formulate based on large water level amplitude, protective measures in the working condition of much silt on the downstream and humidity in the equipment room of the second-dam and project of dewater drainage outlet under the water. By gravity drainage and filling based on water level difference and pump drainage, much electric energy is saved and personnel operating environment and working conditions are improved.

Constructing Machine Tool Foundations Using an LMP Alloy

Currently, the construction of machine tool foundations is a complicated and lengthy procedure with a limited flexibility. In this paper, we present a novel system for constructing machine tool foundations that replaces the need for concrete or concrete-polymer hybrids with a low melting point (LMP) alloy. The system uses a hot bath method to maintain the LMP alloy grouting in liquid form. A fixing device is used to control the embedded depth and positional accuracy of the foundation bolt assembly. The grouting material is injected into the foundation pit by a filling device. This can be extracted from the foundation pit in a later stage with the aid of a recycling device, enabling new machine tool foundations to be manufactured by reusing the LMP alloy grouting material. A prototype was built to test the proposed design. The results show that the system can construct machine tool foundations in a single application, without the delays associated with concrete-based construction, lowering both the economic and environmental cost.

Design of Automatic Bottle Filling Using Raspberry Pi

Water consumption is very high, especially in urban areas. This means a good business opportunity for small and medium enterprises. Those enterprises, therefore, require an automatic and affordable device that can fill water into bottles. Raspberry Pi is the center of the control system in designing this automatic bottle filling device. This is because Raspberry Pi comes a with GPIO pin that is used as an input-output controller. GPIO pin receives signal input from switches and sensors that are then processed using Python programming language to drive an actuator and a solenoid valve. Subsequent hardware testing includes tests for water sensor, director motor, alternating motor, and solenoid valve. It is found that the water sensor works at a voltage of 4.18 V and that The DC motor works at 13.92 V. It is also found that the DC motor moves back and forth at 34.77 V when it is moving up, and at -34.77 V, when it is moving down. Meanwhile, the solenoid valve is found to work at 224.9 V. Therefore; it’s very possible to use Raspberry Pi as the center of a control system for an automatic bottle filling device.

Simulation and verification for seed-filling performance of cell wheel precision seed metering device based on discrete element method

The cell wheel seed metering device was improved and a stirring seed-filling device was added to improve the seed-filling performance of cell wheel pseudo-ginseng precision seed metering devices. Using pseudo-ginseng seeds in Wenshan Prefecture, Yunnan Province as the objects for seed metering, the software application EDEM was adopted based on the discrete element method for the simulation calculation and analysis of the seed-filling performance of the seed metering device under 4 rotational speeds of the cell wheel and 6 rotational speeds of the stir wheel. The simulation results indicate that the filling ratio increases as the rotational speed of the stir wheel increases under a constant rotational speed of the cell wheel. Test verification of the simulation analysis results was conducted on the test bed of the seed metering device. The results indicate that increasing the rotational speed of the stir wheel can obtain a filling ratio of over 90%. The test results display a similar variation trend to that of the simulation analysis with an error of average filling ratio less than 5%. Therefore, it is feasible to analyze the seed-filling performance of the stirring and seed-filling device of the seed metering device with the discrete element method.

Design and Experimental Analysis of Tablets Filling Device

The structure of the micro vibration filling device was designed for tablets and double piezoelectric wafer was used as driving element. Vibration model was established and optimal working parameters were determined. ANSYS was used for modal analysis and the natural frequency was determined. Through experimental analysis the rationality was validated which could meet the filling requirements.

Influences of Main Parameters on Performance of Seed-Filling Device in Plot Seeder

Seed-filling device of plot seeder is the research object. Influences of the four test factors (motion velocity (v), rotation speed of filling device (ω), generatrix length of seed-filling device (l), base angle of seed-filling device (α)) on the uniformity in seeding-filling process for wheat seed are analyzed by DPS7.05. The effect order of four test factors on wheat seed is obtained. Optimum parameters for wheat seed established are as follows: motion velocity of plot seeder 0.4m/s, rotation speed of seed-filling device 0.25rad/s, generatrix length of seed-filling device 0.1m, base angle of seed-filling device 50º. The best plot length for the seed-filling device is 10m and the best CV in seed-filling process for wheat seed is 7.85% when seeding rate for wheat seed are 180g per plot.