SU753836A1

SU753836A1 - Rod electrode for heating concrete

Info

Publication number: SU753836A1
Application number: SU782651960A
Authority: SU
Inventors: Виктор Яковлевич Гендин; Анатолий Дмитриевич Мягков
Priority date: 1978-07-26
Filing date: 1978-07-26
Publication date: 1980-08-07

Description

Изобретение относится к строительству, а именно к электропрогреву бетона.The invention relates to the construction, namely to the electrical heating of concrete.

В настоящее время для прогрева бетона используют пластинчатые, полосовые, струнные электроды.Currently, lamellar, strip, string electrodes are used to heat concrete.

Недостатком указанных электродов является ограниченная область их применения. Наиболее близким из известных ₁₀к изобретению по технической сущности и достигаемому результату является стержневой электрод из круглой стали ИThe disadvantage of these electrodes is the limited scope of their application. The closest known ₁₀ to the invention in terms of technical nature and the achieved result is a rod electrode made of round steel

Недостатком электрода из круглой стали являются потери металла из-за ₁₅невозможности извлечения электродов из затвердевшего бетона. Эти потери при обычно применяемых напряжениях (4985 В) и величинах удельной мощности (5-10 квт/м¹) составляют 4-8 кг на jo 1 м ³ бетона.A disadvantage of a round steel electrode is metal loss due to the ₁₅ impossibility of extracting the electrodes from hardened concrete. These losses at commonly used voltages (4985 V) and specific power values (5-10 kW / m ¹ ) are 4-8 kg per jo 1 m ^{3 of} concrete.

Целью изобретения является обеспечение многократности использования электрода.The aim of the invention is to ensure the repeated use of the electrode.

Указанная цель достигается тем, что стержневой электрод для прогрева бетона выполнен конусообразным с резьбой на боковой поверхности, изменение тангенса угла подъема витков которой по длине обратно пропорционально изменению диаметра.This goal is achieved by the fact that the rod electrode for heating concrete is made conical with a thread on the side surface, the change in the tangent of the angle of elevation of the turns of which along the length is inversely proportional to the change in diameter.

На чертеже изображен электрод с выносным элементом.The drawing shows an electrode with a remote element.

Он состоит из конусообразного стержня 1, боковая поверхность которого выполнена с резьбой 2, изменение тангенса угла подъема витков которой обратно пропорционально изменению диаметра стержня. Для поворота электрода при извлечении гаечным ключом на его конце предусмотрен, например, квадратный выступ 3 или лыски на цилиндрической поверхности, а для присоединения токоподводя— щего провода - цилиндрический штырь 4.It consists of a cone-shaped rod 1, the lateral surface of which is made with thread 2, the change in the tangent of the angle of elevation of the turns of which is inversely proportional to the change in the diameter of the rod. For turning the electrode when removing it with a wrench, at its end, for example, a square protrusion 3 or flats on a cylindrical surface is provided, and for connecting a current-carrying wire, a cylindrical pin 4.

Электрод используют следующим образом. Установку электрода в бетон, подключение к нему токоподводящего провода и электропрогрев бетона выполняются так же,как при использовании известных стержневых электродов. По окончании электропрогрева токоподводящий провод снимают с штыря 4. На квадратный выступ 3 накладывают гаечный ключ и, поворачивая с его помощью электрод, вывинчивают его из бетона. Отверстия в бетоне заполняют цементно-песчаным раствором, что не снижает прочности конструкции по сравнению с конструкциями, в бетоне которых остаются электроды.The electrode is used as follows. The installation of the electrode in concrete, the connection of the current-carrying wire to it and the electrical heating of concrete are carried out in the same way as when using known rod electrodes. At the end of electric heating, the current-carrying wire is removed from pin 4. A wrench is applied to the square protrusion 3 and, turning the electrode with it, unscrew it from the concrete. The holes in the concrete are filled with cement-sand mortar, which does not reduce the structural strength compared to structures in which the electrodes remain in concrete.

Такое устройство электрода позволяет использовать его многократно.Such an electrode device allows you to use it repeatedly.

Claims

The invention relates to the construction, namely to the electrical heating of concrete. At present, plate-type string strip electrodes are used to heat concrete. The disadvantage of these electrodes is the limited area of their application. The closest known to the invention in its technical essence and the achieved result is a round steel rod electrode. A disadvantage of a round steel electrode is the loss of the metal due to the impossibility of removing electrodes from hardened concrete. These losses at commonly applied voltages (4985 V) and specific power values (5-10 kW / m) are 4-8 kg per 1 m of concrete. The aim of the invention is to ensure multiple use of the electrode. This goal is achieved by the fact that the rod electrode for heating concrete is made tapered with a thread on the side surface, the change in the tangent of the angle of elevation of the turns of which is inversely proportional to the change in diameter. The drawing shows the electrode with a remote element. It consists of a cone-shaped rod 1, the side surface of which is made with thread 2, the change in the tangent of the angle of elevation of the turns of which is inversely proportional to the change in the diameter of the rod. For turning the electrode when removing a wrench at its end, for example, a square protrusion 3 or a flat face on a cylindrical surface is provided, and a cylindrical pin 4 is used to connect the lead wire. The electrode is used as follows. The installation of the electrode in concrete, the connection to it of the current of the money-wire and the electrical heating of the concrete are performed 375 in the same way as when using the known rod-like electrodes. At the end of the electric heating, the lead wire is removed from the pin 4. A square wrench is placed on the square protrusion 3 and, turning the electrode with it, unscrew it from the concrete. The holes in the concrete are filled with a cement-sand mortar, which does not reduce the structural strength as compared with the structures in which the electrodes remain in the concrete. Such an electrode arrangement allows it to be used multiple times. 6. The claims of the rod electrode for heating the eton, characterized in that, in order to ensure multiple use of the electrode, it is made tapered with a thread on the side surface, the change in the tangent of the angle of elevation of the turns of which along the length is inversely proportional to the change in diameter. Sources of information taken into account during the examination 1. Guide to electrothermal processing of concrete. NIIZHB. M., SI, 1974, p. 35-57.