Antifreeze device for drain valve of heating pipeline

Abstract

The invention discloses an antifreezing device of a heating line drain valve, and belongs to the technical field of heating lines. The antifreezing device is used for the construction of an outdoor heating pipe network, and comprises a water drain pipe a, a water drain pipe b and a connecting hose, the water drain pipe a is arranged at the local low point of a water supply pipe and is communicated with the water supply pipe, the water drain pipe b is arranged at the local low point of a water return pipe and is communicated with the water return pipe, the connecting hose is communicated with the water drain pipe a and the water drain pipe b, a drain valve A is arranged between the connecting hose and the water drain pipe a, and a drain valve B is arranged between the connecting hose and the water drain pipe b. When the antifreezing device is used, the drain valve A and the drain valve B are simultaneously opened, the opening degree of the drain valve A is a little larger than that of the drain valve B, water flow is made to slowly flow to the water supply pipe from the water return pipe through the drain valves and the connecting hose, and therefore the aim of preventing the heating line drain valve from being frozen off is achieved. The antifreezing device solves the problem that a traditional heating line drain valve is frequently frozen off, maintenance cost is reduced, operating cost is reduced, and the reliability of a heating supply system is improved.

Description

technical field [0001] The invention relates to the technical field of heat supply pipelines, and relates to an antifreeze device for a drain valve of a heat supply pipeline. It is used for the prevention of frost heave damage of drain valves of heating pipes in outdoor cold weather conditions. Background technique [0002] Traditional construction method: directly weld the drain pipe at the local low point of the heating pipeline, connect the drain pipe to the drain valve with a flange, and simply do some insulation measures on the drain pipe. There are following drawbacks in the above method: [0003] 1. The water stored in the drain pipe and the drain valve is perpendicular to the water flow direction of the heating pipe, and the water in the drain pipe and the drain valve hardly communicates with the water in the heating pipe, resulting in the water in the drain pipe and the drain valve It almost becomes "dead water". The lower the drain pipe is, the more serious the "...

AI Technical Summary

Problems solved by technology

[0003] 1. The water stored in the drain pipe and the drain valve is perpendicular to the water flow direction of the heating pipe, and the water in the drain pipe and the drain valve hardly communicates with the water in the heating pipe, resulting in the water in the drain pipe and the drain valve It almost becomes "dead water". The lower the drain pipe is, the more serious the "dead water" phenomenon is. The valve is in the most serious part of the stagnant water phenomenon, and it is also the part where the heat of the heating pipe is the weakest. In the cold and long engine, it is easy to freeze. Expansion damage

[0004] 2. The structure of the drain valve is complicated, and it is difficult to implement heat preservation, which is the weak point of heat preservation

Under normal circumstances, the insulation measures at the valve do not have a good insulation effect, and it is easy to damage the drain valve due to frost heave.

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