RU2343247C1 - Pipeline freeze protective device - Google Patents

Abstract

FIELD: construction, pipeline.

SUBSTANCE: invention pertains to the field of heating and water supply. Device protecting pipeline from freezing contains heat insulated pipeline with bleed-off from the pipeline actuating unit. Whereat actuating unit consists of water pipe cock threadedly secured of the branch pipe welded into the hot water pipeline and made capable of micro-circulating in the hot water pipe branch maintaining positive temperature inside the cock. Grip portion of water - pipe cock is made as an accordition boot internal surface whereof is cone-shaped, with one end of least two coils of channeled stainless steel pipe connected to it, by other end the coils are connected to the bottom. Provided that the bottom is connected with a stock containing a valve closing seating of the cock. There is a threaded opening in the bottom closed by a male screw with a gasket seal.

EFFECT: enhanced reliability of the device and simplified design of the construction.

1 dwg

Description

FIELD OF THE INVENTION

The invention relates to the field of operation of heating and water supply systems of outdoor boilers, in particular to devices for protecting the pipeline from freezing, and can be used to automatically drain the coolant from heating systems of residential buildings, water networks laid open with the possibility of eliminating the defrosting of these systems.

State of the art

A device for protecting the pipeline from freezing is known, comprising a housing with holes in the lower part, a drain pipe, an annular piston installed in the housing and a valve connected to it with a sealing element, the valve being made in the form of a cap forming an airtight cavity filled with water with a sealing element .

In the device, the housing is made in the upper part with inwardly directed limbs interacting with the annular piston (see a.c. SU No. 1652471, class E03B 7/10, publ. 05/30/1991).

The disadvantage of this device is its low reliability.

A device for protecting the pipeline from freezing is known, comprising a housing installed in the pipeline with holes in the lower part, an annular piston with a guide placed in the housing, a drain pipe and a sealed container filled with water, while it is equipped with an annular locking element covering the guide of the annular piston and fixed on the drain pipe, and a sealed container is placed in the upper part of the drain pipe and bounded from below by a spring-loaded cap having the ability to vertically ceiling elements move in the discharge conduit, and directing the annular piston and the wall of the drain pipe configured to align the holes.

The device is equipped with a sleeve installed in the lower part of the drain pipe and rigidly connected to the guide of the annular piston through the slots formed in the wall of the drain pipe, a vertical rod connected in the upper part with the cap, and an additional piston with a control handle located in the upper part of the sealed container ( see AS, SU No. 1721194, class EV03/10, published on March 23, 1992).

The disadvantage of this device is the design complexity, low reliability.

The closest in technical essence and the achieved positive effect and accepted by the authors for the prototype is a device for protecting the pipeline from freezing, including a housing with holes installed inside the pipeline, a drain pipe, an annular piston, a valve with seals, while a rod with the levers is attached to the annular piston with a groove on which, with the possibility of moving along it, is worn a valve with a cavity made in it and heat-sensitive elements placed in it, and on the shaft above the valve an elastic element is placed (see US Pat. RF No. 2062839, class EV03/10, publ. 06/27/1996).

The disadvantage of this device is the design complexity, which requires installation inside the protected pipeline with welding work to drain the water from the protected system, which is expensive and not always possible, low reliability.

Disclosure of invention

The technical result that can be achieved using the present invention is reduced to the availability of service, improving the reliability of the device and simplifying the design.

The technical result is achieved using a device to protect the pipeline from freezing, containing a thermally insulated pipeline with an actuator for draining water, while the actuator consists of a water valve, the head of the water valve is made in the form of a bellows, the inner surface of which is made in the form of a cone, one end to which at least two turns of corrugated stainless steel pipe are connected, and at the other end of the turns are connected to the bottom, the last connection It is connected with a rod, which contains a valve that covers the valve seat, and the bottom has a threaded hole closed by a screw with a gasket to be sealed, while the valve is fixed to the thread of the pipe, which is welded into the protected pipeline.

Brief Description of the Drawings

The drawing shows a device for protecting the pipeline from freezing, General view.

The implementation of the invention

The device for protecting the pipeline from freezing contains an actuator for draining water, which consists of a water valve 1, while the head of the water valve 1 is made in the form of a bellows 2, the inner surface 3 of which is made in the form of a cone, and is welded to the conical surface 3 of the bellows 2, at least two turns 4 of the corrugated stainless pipe, turns 4 are flattened close to each other, the same turns 4 are welded on the other side to the bottom 5, the latter is connected to the stem 6, and the bottom 5 has a threaded hole A hole 7, closed by a screw 8 with a sealing gasket 9, while the stem 6 is sealed in a bellows 2 by a seal 10 and includes a valve 11 that covers the seat 12 of the water valve 1, and valve 1 is fixed to the thread of the pipe 13, which is welded into the protected pipe 14, while the protected pipeline 14, the water valve 1 and the bellows 2 are insulated with insulation 15.

A device for protecting the pipeline from freezing works as follows.

Water is poured into the internal cavity 3 of the bellows 2 through the threaded hole 7, the screw 8 is tightened, sealing the internal volume of the bellows 2 with a gasket 9, the heating or water supply system is turned on, hot water circulates through the pipe 14, due to microcirculation in the pipe 13, the water valve 1 also maintains a positive temperature. Thermal insulation 15 provides a positive temperature in the pipe 14 and bellows 2 of the water valve 1, in the event of an emergency (for example, disconnecting the boiler from the electric power, stopping gas supply, stopping the circulation pumps and other reasons), the circulation in the pipe 14 stops and microcirculation in the pipe 13 stops and water valve 1. The system cools to the freezing level, while due to the remoteness of the bellows 2 from the pipeline 14, the bellows 2 is the first to “defrost”, water in the conical surface 3, the bellows 2 turns into ice, which, having increased its volume compared to water, transfers upward movement, the turns 4 of the corrugated stainless pipe move apart, raise the bottom 5, which raises the stem 6 with valve 11, the seat 12 of the water valve 1 opens, water automatically removed from the protected pipeline 14, thawing of the pipeline 14, heating appliances and the outdoor boiler does not occur. To restore the heating system, it is necessary to unscrew the bellows 2 from valve 1, unscrew the screw 8, warm the bellows 2, squeeze the coils 4 all the way back, screw the bellows 2 into the valve 1, fill the inner conical surface 3 with water through the screw hole 7, tighten the screw 8 s sealing gasket 9, the water will be held in the conical surface 3 by the sealant 10. It is necessary to fill the pipeline 14 again and its operability is again ensured, after two or three times defrosting the bellows 2, it must be menit.

The invention in comparison with the prototype and other known technical solutions has the following advantages:

- the possibility of affordable service;

- simplification of the design of the device;

- improving the reliability of the device;

- increase the environmental cleanliness of the environment.

Claims (1)

A device for protecting the pipeline from freezing, comprising a thermally insulated pipeline with an actuator for draining water from the pipeline, characterized in that the actuator consists of a water valve mounted on a pipe thread welded into the hot water pipe and made with microcirculation in the hot water pipe for maintaining a positive temperature in the valve, the head of the water valve is made in the form of a bellows, the inner surface of which is made in the form cone, at one end of which at least two turns of corrugated stainless steel pipe are connected, and at the other end of the turns are connected to the bottom, the latter being connected to a rod that contains a valve that covers the valve seat, and in the bottom there is a threaded hole closed by a screw with a sealing gasket, in addition, the bellows is configured to place water in its cavity, freezing when the circulation in the hot water pipeline ceases.