Among the most important components of the production equipment at a dairy plant, a special place is occupied by the milk pump. For pumping fluids and substances used models of various designs. Each of them has its advantages and disadvantages. With the help of such units is pumped not only milk, but also sour cream, cream, yogurt, yogurt, curd mass, mixtures of ice cream and even butter. The right pump is the key to the efficient operation of the production line.
The most important parameters of dairy pumping equipment
High-quality pumping of working fluids of various viscosities provide pumping units with specific characteristics.
The best pumps for milk differ in certain technical parameters, they must meet certain special requirements and solve the following tasks:
- guarantee a good outlet pressure;
- ensure uniform pumping, supply of dairy products;
- have a simple structure;
- be reliable and durable.
Their internal cavities and nodes should be easily disassembled, they need to have free access.
When purchasing a pump, it is important to consider its head and performance. These parameters are closely interrelated. For example, at a constant speed of rotation of the screw in a centrifugal device, they remain stable.
In addition, it is necessary to take into account the possible losses due to friction, the velocity head during the suction into the pipeline, and take into account such characteristics as the suction height. It can be geometric or vacuum.
Main working parts of units
All devices designed for pumping milk in the production process can be divided into three main types: centrifugal, gear, vane pumps.
The centrifugal force arising from the rotation of the blades underlies the work of the most universal pumps. Such units are characterized by small size, simplicity of design. They are easy to disassemble for washing, to replace individual elements and components on their own. Due to this, such pumps for milk can pump without problems practically any products of its processing of different consistency and viscosity.
Gear pumps make it possible to transport even the most viscous fluids with the help of two rotating gears inside the working chamber. The resulting internal pressure pushes the contents of the pipes in the direction of the outlet.
The lamellar models have a rotor fixed inside the case with radial grooves through which special plates move. This node is the main working part of such units. In the process of rotation, these structural elements are constantly moving, creating a translational motion of the liquid mass.
Features and benefits of centrifugal devices
It has long been in the food industry of various profiles used various types of pumps (pumps). Each of them has its advantages, disadvantages and is most suitable for a particular production.
For dairy processing plants, centrifugal models are the best option for an electric pump. The simplicity of the design of such units, their compactness, low weight, and the absence of drive belts guarantee reliability and efficiency. The devices do not require special skills, skills for disassembly, assembly. They are easy to maintain, connect to various pipelines.
Installation of such pumps does not require a special foundation. Their performance can be easily adjusted using a convenient crane. These units differ in efficiency, durability in work. Their greatest drawback is the need to pre-fill the working fluid.
Made of stainless steel
All centrifugal devices for pumping dairy products can be divided into two broad categories: self-priming and blade, requiring pouring before work.
If you want to pump out milk from tanks that are located below the floor level, then self-priming units are used.
Bladed models can be divided into three types: blade models that do not have a disk, as well as devices with an open or closed disk.
Units with a disc can be single-stage or have two stages. Diskless pumps have become widespread because of their reliability, lightness, ease of maintenance.
Such milk pumps are made of anti-corrosion stainless steel. They differ in capacity from 6 to 25 cubic meters. m per hour Their various types are installed on the milk pipelines coming from milking machines and connecting various technological capacities.
Powerful pumps that can pump up to 50 cu. m per hour, used to unload milk from road, rail tankers.
In addition, these units allow you to configure various dairy equipment.
Differ in the location of the blades
Centrifugal pumps are cylindrical and mounted directly on the shaft of an electric motor. From above, the body is closed with a hermetic cover, on which the suction tube is attached along the shaft axis. On the tangent to the pump body is installed discharge pipe.
Self-priming devices use a rotating wheel with straight or curved blades. Communications are brought to such pumps and joined from above. Pre-pouring of the working fluid is required only at the initial stages of device startup, and during continuous operation a small amount of the transfer product always remains inside the unit.
In pumps with a disc of a closed type, the blades are installed between protective circles, in the center of which there is an opening. And open disk units are characterized by blades, which are located directly on the disk.
Two-stage units have two pumps that are installed in series. This design increases the performance of pumping equipment.
Vacuum works without noise and dust.
Vacuum pumps have a lamellar-rotary design and are used to create a vacuum inside the piping systems that connect the milking machines with milk tanks during machine milking of cows. The pump itself, as well as the electric motor, is installed on a special base. The drive is carried out using wedge-shaped belts, which are covered with a protective casing to reduce noise during operation.
A variation of the vacuum pump for milk is a water ring device. Such a unit is more practical. In the process of its work there is no friction between the working surfaces of the parts, so their wear is significantly reduced. This pump does not consume oil, does not pollute the environment, practically does not create noise with active functioning.
Properly chosen vacuum apparatus for pumping milk is the heart of any milking system. It helps to ensure high efficiency and productivity of milking, and the health of cows is preserved. Read more about this in the article "Vacuum pumps for milking machines."
About the correct installation of units
Despite the need for compact placement of pumping equipment, it must be mounted so that there is no difficulty in circulating the working fluid. Be sure to take the load off the pump from the pipe. To do this, they should not be sharply narrowed due to T-shaped elements, knees or valves directly in front of the pump. This will prevent sedimentation and air blockage.
In addition, the suction nozzles should be positioned with a uniform lift, and the supply pipes - with a constant slope. Exit the tank before the pump must be arranged in the form of a funnel. This will prevent the formation of the milk mass of the vortices. The pressure nozzle must be placed on the side to ensure idling at the end. The discharge pipe should have approximately the same diameter.
Adhering to these installation rules, you can ensure uninterrupted productive operation of the milk pump for a long time. In addition, it should be located at the lowest point, and during operation it is better to pump cold working fluid.
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