RU2810872C1 - Drain pipe heating device - Google Patents

Abstract

FIELD: heating engineering.

SUBSTANCE: invention relates to heating a ship's drainage system: scuppers, drainpipes and other open vertical water pipelines. The device ensures a tight fit of the heating cable to the walls of the drain in a wide range of diameters. The device is a stainless-steel spiral spring. The spring is held in a compressed state by a plastic tie and a layer of glue between the coils of the spring. The adhesive composition is made of a material (special polymer, special wax, etc.) that loses physical strength and adhesive ability when heated. On the outer coil of the spring, special loops are installed on opposite sides for attaching threads of the heating cable. The compressed state of the spring during installation is ensured only by fixation with a polymer composition. When power is applied after installing the heating line in the drain, the heating cable heats up, as a result of which the adhesive layer loses its adhesive ability and is destroyed, and the spring, straightening, with its outer coil tightly presses the heating cable to the walls of the pipeline.

EFFECT: improved performance.

2 cl, 1 dwg

Description

The invention relates to the field of heating engineering, and specifically to heating a ship's drainage system: scuppers, drainpipes and other open vertical water pipelines.

During the operation of ships in the winter season and at low temperatures, circumstances often arise in which scuppers and other drainage pipelines freeze, become clogged with ice and prevent normal drainage. Such circumstances may negatively affect the normal operation of the vessel and cause discomfort to the operating personnel.

The present invention “Drainage pipe heating device” is designed to ensure the safety of operations and comfort of personnel, as well as the standard functionality of open drainage systems in conditions of low operating temperatures of the vessel.

Electrical heating using self-regulating heating cables is considered the most effective heating of external ship equipment. This anti-icing method can be effectively used to heat ship scuppers, gutters, and other vertical drainage devices exposed to low temperatures.

However, when laying and installing heating cables in vertical pipelines (drainage system, scupper system), a problem arises that is associated with a loose fit of the heating cables to the walls of the pipeline. A loose fit and lack of contact with the heated surface negatively affects the efficiency of its heating.

Currently, to lay a heating cable in drainpipes, a cable or chain suspension is used, to which the heating cable is attached, and then lowered into the drain. The cable is attached at two points - at the upper entrance to the drain and the lower exit from it. In this case, in the drain itself the cable is in a free state and does not adhere to the walls of the drainpipe (scupper). The cold walls of the drain have a significant negative impact on the throughput of the drain when frozen.

The proposed invention eliminates this problem by ensuring a tight fit of the heating cable to the walls of the drain in a wide range of diameters. The device is a spiral spring made of stainless steel 1 (Fig. 1). The spring is held in a compressed state by a plastic tie (not shown in the drawing) and a layer of glue 2 between the coils of the spring. The adhesive composition is made of a material (special polymer, special wax, etc.) that loses physical strength and adhesive ability when heated. On the outer coil of the spring, special loops 3 are installed on opposite sides for fastening the threads of the heating cable 4.

The plastic tie is designed to hold the spring in a compressed state during transportation and installation of the heating line. After installing the line, before immersing it in the drain, the tie is removed, and the compressed state of the spring is ensured only by fixation with a polymer composition.

When power is applied after installing the heating line in the drain, the heating cable heats up, as a result of which the adhesive layer loses its adhesive ability and is destroyed, and the spring, straightening, with its outer coil tightly presses the heating cable to the walls of the pipeline. The next coil of the spring exerts additional force on pressing the cable to the walls of the drain. The number of turns in one spring and the springs themselves in the line depends on the diameter, as well as the parameters of the pipeline material and is determined by calculation.

The proposed heating device for drain pipes is most effective for maintaining a positive temperature in vertical pipelines, because can be installed in an already installed pipeline and does not involve violating its tightness, for example, by making mounting holes for installing a heating line.

This invention can be effectively used for heating drainpipes of scuppers and drainage systems not only in the shipbuilding industry, but also in industrial and civil construction.

Claims (2)

1. A method for heating drain pipes using a heating device consisting of a stainless steel spiral spring, the outer coil of which has special loops on opposite sides, into which, when installing the electric heating system line, a self-regulating heating cable is installed, while the coils of the spring are fastened together during transportation with plastic a clamp, which is removed before installing the heating line, and an adhesive composition, which, when power is supplied to the heating cable and the latter is heated after installing the line in the drain, loses its adhesive properties, which allows the spring to straighten and tightly press the heating cable installed in the loops of the outer coil to the walls of the heated pipe surface. 2. A device for heating drain pipes for implementing the method according to claim 1, consisting of a spiral spring made of stainless steel, the coils of which are fastened together in the transport state with a plastic clamp, which is removed when put into operation, and an adhesive composition, while the outer coil of the spring has special loops on opposite sides for installing a heating cable in them when installing an electric heating line, which heats the inner surface of the pipe due to its pressing to the surface, caused by the straightening of the spring due to the loss of adhesive properties by the composition applied to the coils of the spring after power supply and heating cable.