SU1673002A1 - Facility for milk cooling under low air temperature - Google Patents

Abstract

The invention relates to agriculture, in particular to equipment for the primary processing of milk, and can be used during cold seasons at dairy farms and milk receiving stations. The purpose of the invention is to increase reliability. This is achieved in that the installation contains an outdoor tank 1 for water, on the throat of which a heat exchanger 2 of water and cold air is installed. A circulation circuit 3 is connected to them with a pump 4 and a milk cooler 5. The installation has a device to prevent the walls of the tank 1 from collapsing at low air temperatures, consisting of an expansion tank 7 connected to the tank 1 and a drain pipe 8 with a valve 9 located at the end of the double-arm lever 10. The other end of the lever is between the rubber spring 11 and a rod 12 of the sensor 13 for freezing water in the tank 1. The sensor 13 is in the tank in the marginal freezing zone of ice between the inlet of the pipe 8 and the wall of the tank 1 nearest to it 1. The sensor 13 consists of filling water Nogo steel cup 14, the membrane 15 is hermetically closed, the rod 12 attached to the membrane. 1 hp f-ly, 1 ill.

Description

The invention relates to agriculture, in particular to equipment for the primary processing of milk, and can be used in the cold season at dairy farms and milk collection points.

The purpose of the invention is to increase reliability.

The drawing shows an installation for cooling milk at low air temperatures, General view.

Installation for cooling milk at low air temperatures contains located outside the tank 1 for water, in the neck of which is installed a heat exchanger 2 of water and cold air. A water circulation circuit 3 is connected to them with a pump 4 and a milk cooler 5.

The installation also contains a device for preventing the destruction of the walls of the tank 1 for water, consisting of communicated by the pipe 6 with the tank 1 expansion tank 7, as well as located in the lower part of the tank 1 drain pipe 8.

At the inlet of the drain pipe 8, a valve 9. is mounted on the end of the two shoulders of the lever 10. The other end of the two shoulders of the lever 10 is mounted between the spring 11 and the rod 12 of the water freezing sensor 13. A water freezing sensor 13 is fixed between the inlet of the drain pipe 8 and the wall of the water tank 1 closest to it, in the limit zone of ice freezing inside the tank 1. The water freezing dachtik 13 is made in the form of a steel cup 14 with a membrane 15 and a rod 12, a submembrane space of the cup 14 is filled with water. The water circulation circuit 3 has an intake pipe 16 installed in the tank 1. The heat exchanger 2 consists of nozzles 17 mounted on the pipe 18 of the water circulation circuit 3, and a fan 19.

The device operates as follows.

Cooled water from the tank 1 is pumped by pump 4 into the milk cooler 5, where, heated from milk, it enters the heat exchanger 2, where the nozzle 17 is sprayed and blown with cold air from the fan 19, again entering the tank

1. On the walls of the tank 1, ice freezes, while part of the water under the influence of excess pressure enters through the expansion pipe 6 into the expansion tank 7. With sharp drops in temperature and in emergency situations, the ice thickness increases, the water in the glass 14 of the sensor 13 freezes, bends the membrane 15, the rod 12, presses on the end of the lever 10, compresses the spring 11, opens the valve 9 and the water from the tank 1 flows into the sewer, which prevents the freezing of the intake pipe 16.

The stroke of the rod 12 of the sensor 13 freezing water is determined by the formula s

where V is the volume of the glass;

F is the area of the membrane from the side of the glass;

β · \ - coefficient of volume expansion of water during freezing;

β2 ~ coefficient taking into account the shape of the deflection of the membrane (/ ¾> 1).

Varying the ratio of the length of the shoulders of the two shoulders of the lever 10 and the elements of the sensor 13 freezing water, adjust the stroke of the valve 9 at the inlet of the drain pipe 8.

Thus, the installation for cooling milk at low air temperatures with an expansion tank connected by a pipe to the expansion tank and a water tank made with a drain pipe with a valve and a water freezing sensor can improve the reliability of the installation at low air temperatures.

Claims (2)

Claim 1. Installation for cooling milk at low air temperatures, containing a water tank with a heat exchanger, a water circulation circuit with a pump and a cooler, and also a device for preventing the destruction of the walls of the water tank, characterized in that. that, in order to increase reliability, the device for preventing the destruction of the walls of the water tank consists of an expansion tank in communication with the water tank and a drain pipe located in the lower part of the water tank, and a valve with a freezing sensor is installed on the inlet of the drain pipe water fixed between its inlet and the wall of the water tank closest to it. 2. Installation according to claim 1, characterized in that the valve is installed at the end of the two shoulders of the lever, and the water freezing sensor is made in the form of a glass with a membrane and a rod, the submembrane space of the glass is filled with water, and the other end of the lever is spring-loaded to the rod.