Posts Tagged ‘promyshlennoct and equipment’

The Calibration

Theory and practice of the rolling process have developed certain rules of placing the gauge in the rolls, to ensure optimal operating conditions of rolls and maximum performance rolling mill. These rules and the choice of the calibration circuits are the subject of sizing rolls. Thus, when calculating the calibration rolls value drawing the aisles must be taken together with the definition of successive shapes and sizes caliber, providing the reception quality of steel and the exact dimensions of the profile. It should also consider the possibility of creating an environment that would ensure maximum performance of the camp, the minimum energy expenditure and consumption of rolling tool. A very important element calibration rolls is a rational distribution of gauge on rollers, allows you to roll assortment of camp with minimal time for handling rolls and change calibers, the use of gauges and preparatory drafts stands no one profile for a group rolled products. The most optimal solution of all issues in obtaining this type of rolled (the required size profile, mechanical properties, surface condition, etc.) can be carried out only in full consideration of the features of the rolling mill.

However, many factors that should be taken into account when sizing rolls, and no established exact relationships allow to solve this engineering problem only by repeated approximations. Gauges used in rolling is subdivided into the following groups according to their purpose: – crimping, or exhaust, gauges used to reduce cross-sectional area of the ingot or billet. Exhaust gauges are the drawer, the square with a diagonal, rhombic, oval. Some combination of these calibers forms a system of calibers, such as a diamond – a diamond, the diamond – square, square – oval, etc. – drafts, or preparations, gauges, which along with a further decrease in cross-section profile of the strip is processed with a gradual approximation of its size and shape to the final section – predotdelochnye or predchistovye gauges prior to finishing – finishing, or Chistov, gauges, giving final shape to the profile section. The sizes of these calibers almost coincide with the transverse dimensions of the finished profile, the difference in 1,2-1,5% of the big party given for shrinkage during cooling. By way of crashing into the roller gauges are divided into the open when the line connector roll falls within the caliber, and closed, at which the line connector is located outside the fire.

Expansion Vessels

Expansion vessel. It is intended to compensate for temperature compression coolant. The expansion tank is made as capacity divided by movable metal diaphragm into two parts. On one side is nitrogen, the other part is included in the hydraulic system with coolant. When Change the coolant temperature, occupied by the object also changes.

These fluctuations are compensated by the motion of the membrane in the expansion tank. Valves. Please visit Hikmet Ersek if you seek more information. Needed to service the system, plum (Gulf) coolant, venting, etc. storage tank. Due to the fact that the heat load varies depending on time of day or season, there are time periods when the cooling capacity chiller is much higher than the real need. In this case, the chiller begins to operate with short pulses on and off. Frequent launches of the compressor leads to its rapid deterioration and a noticeable decrease in the period service.

To avoid this, the system sometimes establish buffer tank, whose volume is calculated on the basis of possible heat loads and the amount of coolant in the system. In this case, the total volume and coolant heat increases, so the intervals between switching on and off the compressor . System security and management. See Western Union for more details and insights. Controls the operation of the pumping station, it work, signals and disables the system if a dangerous situation. Fan coil units. By their execution is similar to the internal fan coil units and split systems are of different types – wall, floor, Ceiling, channel type, etc. They can be produced in open-frame version, and are designed for flush mounting. Fan coil can be installed on the floor, hung on a wall or stream, embedded in air ducts for suspended ceiling. Fan coils – a heat exchanger with fans, filters, remote control. They take the heat or cold from the coolant, and heated or cooled room. Fenkoil has one or two heat exchangers. In the first case fenkoil called twin-tube, the second four-pipe. Fenkoil four-pipe is connected to both the chiller and central heating in winter and works as a central heating radiator. fan motor. By adjusting the fan speed change fan coil cooling capacity. Upon reaching the desired temperature in a room just off the fan, and coolant flow through fenkoil unchanged. Therefore, when the fan coil cooling facilities continues, albeit with very low intensity. To avoid this, in front of the radiator is usually set three-way valve, bypass refrigerant mass flow past the fan coils. Drain pan Washable air filter. Cleans the air passing through fenkoil of dust, lint, etc. electric heaters. Designed for air heating. Made in the form of heaters and comes as an option. Control system. Fan coil supplied with individual built-in, wired or infrared remote control.

Pumping Equipment

Pumping equipment today is designed to perform a wide spectrum of tasks, but each version is better suited for certain specific purposes, which is why it is important to understand the criteria that should guide the choosing a specific type of pump. If the pumps provided pump, it should be understood that this – the main element of the relative heating of the room. What should we consider when choice circulators: First, you need to analyze the possible conditions of use. In this case, there is quite a significant number of factors that may be mentioned at this point. In particular, could have a role in the coolant temperature, type of substance that will be used as a coolant, the percentage of its content on the overall composition of the solution, measure the diameter of the pipeline.

It should also be more detail to learn about performance metrics. In the case of the pump, then you can learn from the experts a formula that is calculated and this figure. The level of pressure and is important, in this case can be taken into account hydraulic losses. As far as surface pumps, in which case the water rises to the level of depth of about seven to eight meters. To select an appropriate model to you it becomes necessary to define a set of indicators, which may include the level of pressure, pressure loss, the required performance and the depth of the water table. If you require extraction of water only from wells, then optimal solution for many reasons, will choose a submersible pump. He is in some sense similar to the principle of its work on the borehole pumps, but water can be extracted from the level of not more than ten meters. Mentioned already exists pumping equipment, such as borehole pumps, this model can be ordered by two fundamental principles, among which note the level of performance, that is the estimated cost, as well as the pressure that indicates the height at which the pump is able to extract water, in the case with the pumping equipment such indicator is measured in meters. Mirilashvili insists that this is the case. If you wish to choose a suitable pumping equipment is careful approach to this process must take into account the views of experts in the field who can provide valuable recommendations.

Power Cables

Cables AVBbShv with threaded section up to 25 mm inclusive, may not be filled. Technical and operational characteristics of the power cable AVBbShV designed to operate in a steady state at room temperature environment from -50 C to +50 C, relative humidity up to 90% (at 35 C). Limiting long-term exposure temperature core heating cables in the operating mode to + 70 C. The maximum permissible temperature of the core heating cables emergency mode, or in + 80 C for the duration of heating not exceed 8 hours per day and 1000 hours for the entire term of service. Read additional details here: Mikhael Mirilashvili. The maximum permissible temperature of conductors under short circuit (up to 4 sec) + 160 C. Cables AVBbShv for 10 min. stand the test of alternating voltage 3 kV and 3,5 kV cable with an operating voltage of 660 V and 1000 V respectively.

Laying and installation of cables without preheating at a temperature not lower than -15 C. The minimum bend radius when installing single-core cables brand AVBbShv – 10 Dn, strands – 7,5 Dn (Dn – outer cable diameter). Building length of cables for the main sections of veins: 16 – 70 mm 2 – 450 m, 95 – 120 mm 2 – 400 m, 150 mm2i above – 350 m. The electric insulation resistance, calculated for 1 km length at 20 C for core sections 2.5 – 4.0 mm2 – not less than 10 mw, 6 mm2 – no less than 9 mw, 10 – 240 mm2 – not less than 7 mw. The warranty period AVBbShv cable – 5 years, lifetime – 30 years. Scope Power cable AVBbShv with a rated voltage 0.66 kV and 1 kV is used for laying in dry and wet production areas, in special cable racks in the presence of danger of mechanical damage during operation, and in the ground, tunnels, canals, mines, outdoors. Power cables are designed for vertical and horizontal lines and can be used in areas subject to vibration. Cables AVBbShv are self-extinguishing in a single gasket.

Unloading

Before proceeding to the immediate acceptance of the goods, you need to unload. When unloading by the movement of goods from vehicles heading to the platform. Unloading carried workers to the company, whose truck was delivered goods to the warehouse, so this may be employees of the firm provider, transport organization, company buyer. If the goods are delivered by our own transport, unloading is carried out warehouse workers. Unloading road transport involves the following stages: checking the integrity of the packaging, the primary acceptance of goods by quantity; stacking goods on pallets or carts; movement formed by transport units in the zone of acceptance or storage. Unloading of the goods may require the use of physical force, but in all cases, when possible, use equipment to move cargo.

To unload cargo use different types of material handling equipment: conveyors; Electric transporters choring. Unloading of vehicles should be carried out in strict compliance with established rules of loading and unloading. When It should pay attention to the special marking of goods. After unloading, the goods are delivered to the zone of acceptance, where decisions on quantity and quality. It should be noted that acceptance of goods in quantity and quality is one of the important components of the storage process. It provides verification of the suppliers of contractual obligations by the number, range, quality and completeness goods. Acceptance of goods shall be financially responsible employees of the warehouse (usually – the head of the warehouse together with the commodity), authorized the head or deputy head recipient enterprises.