RU2070632C1 - Non-freezing hydrant - Google Patents

Abstract

FIELD: water supply. SUBSTANCE: non-freezing hydrant has a housing, which throughout the entire height is made as a hollow cylinder. A cock is installed in the upper part of the housing. The overground of the housing is covered with heat-insulating material. The housing accommodates a stand pipe that is expanded from below and filled with non-freezing liquid, the lower part of the housing and the expanded vessel are positioned for direct contact with melted snow. EFFECT: enhanced reliability. 1 dwg

Description

 The invention relates to water-folding devices for domestic water supply.

Known non-freezing water folding column, consisting of a housing, discharge pipe, valve, starting device, a tank for collecting water. The walls of the tank are double, their lower part is immersed in the supply pipe, the volume between the walls is partially filled with a liquid having a boiling point below 0 ^o C.

 This invention is taken as a prototype.

 The disadvantage of the prototype is its freezing with a long absence of water with a dead-end supply pipe. If the pipeline is brought to the standpipe and does not provide further transit to other consumers of water, then the heat contained in the piping water is not enough to protect against freezing of the column in the event of a prolonged absence of pickup.

 The objective of the invention is the implementation of a water-folding column non-freezing with a dead-end scheme of the supply water supply and the prolonged absence of water analysis.

 The technical result is achieved by the fact that in the standpipe consisting of a casing placed in the atmosphere, a layer of seasonal freezing, a thawed soil zone, a water tapping tap in the upper part of the casing and a supply pipe laid below the zero isotherm, a riser is located in the casing, expanded from the bottom and filled non-freezing liquid, the column body to the entire height is made in the form of a hollow cylinder in its upper part there is a water folding crane, the above-ground part is covered with thermal insulation, the lower part of the body and expanded Single container in direct contact with the melted soil.

 The drawing shows a water column, section.

 The standpipe contains a housing 1 located in the atmosphere, a layer of seasonal freezing and a zone of thawed soil. A water-folding crane or fire hydrant 2 is placed with its end in the space of the column body. The above-ground part of the casing is covered with thermal insulation 3. In the casing there is a device 4 in the form of a cylindrical riser, expanded downward and filled with non-freezing liquid. A pipe 5 is installed to separate convective fluid flows. The supply pipe 6 is laid below the zero isotherm mark. The extended part of the device 7 is in direct contact with thawed soil.

 An example of a non-freezing fluid filling a convective heat transfer device is kerosene. Kerosene does not freeze at the lowest temperature possible in the atmosphere, it maintains good fluidity, changes in density in a straight line relationship with temperature fluctuations, metal pipes do not corrode from kerosene.

 The water column works as follows.

 During tapping, there is a process of heat accumulation in the device body, in the soil around the column (the volume of thawed soil increases, its temperature rises). If the water intake stops in winter, then the heat loss is compensated by the accumulated heat. With a prolonged absence of tapping, the water in the housing will cool to zero degrees. As soon as the water temperature in the column body falls below the temperature of the thawed soil, the convective heat exchange device will automatically turn on. The drawing shows the convective flow of kerosene in this case. Due to the circulation of kerosene, the warm melt soil will be transported upward, warming the water in the column body.

 The kerosene circulation in the device may automatically stop in the following cases.

resumption of water extraction when the water temperature is higher than the temperature of thawed soil;
warming of atmospheric air, when even in the absence of tapping, the temperature of the water in the column will exceed the temperature of thawed soil.

The total amount of heat going to cover the heat loss and with a long termination of water extraction has the following components:
the heat content of water in the column case when it is cooled to zero degrees;
soil heat content around the column in the seasonal freezing layer during cooling and freezing;
heat of thawed soil around the lower part of the column body and the expanded part of the convective heat transfer device.

 Thawed soil below the zero isotherm mark is in direct contact with the lower part of the column body and part of the convective heat transfer device.

 The warming effect of all components of the accumulated heat and heat of the melt zone of the soil ensures the freezing of the standpipe in the absence of a standpipe for a long time in the most severe weather. Almost the column will be frost-free throughout the winter.

Claims (1)

 Non-freezing water supply column containing a casing placed above ground and in the ground, a water cage, a supply pipe, a heat exchanger filled with non-freezing fluid, characterized in that the casing of the column is made to the full height in the form of a hollow cylinder, an upper water cage is installed in its upper part the part is covered with thermal insulation, a riser is located in the casing, expanded from below and filled with antifreeze liquid, the lower part of the casing and the expanded capacity are installed with the possibility of direct contact with thawed soil.