SU1502341A1 - Roller for heat treatment of the surface of articles made from concrete mixes - Google Patents

Abstract

The invention relates to processing equipment for molding and heat treatment of concrete and reinforced concrete products. The aim of the invention is to reduce the thermal inertia of the device by increasing the rate of heat transfer from the coolant to the workpiece. The roller contains a cylindrical body, in the cavity of which a heater-coil is placed. The coil is made in the form of a cylindrical spiral, the coils of which are located close to each other and with a gap relative to the body. The body is made of a magnetically hard ferromagnetic material, and the gap is filled with a magnetic fluid. 1 il.

Description

The invention relates to the process equipment used in the manufacture of products and structures made from concrete mixtures, namely to the processing equipment for molding and heat treatment of concrete and reinforced concrete products.

The aim of the invention is to reduce the thermal inertia of the roll by increasing the rate of heat transfer from the coolant to the workpiece.

The drawing shows a swath.

The roller is a cylindrical body 1, made in the form of a permanent magnet of a magnetic ferromagnetic material, equipped with removable diamagnetic covers 2, in which bearings 3 are installed.

bearings 3 installed coil 4 with the ends in the form of hollow trunnions, and the coil is made in the form of a cylindrical spiral, the coils of which are located close to each other and with a gap relative to the cylindrical body 1. In the gap between the coil 4 and the body 1 introduced magnetic fluid 5 in volume, sufficient to fill the specified gap. The roller in the process of work produces molding and heat treatment of the product 6.

Magnetic fluid is, for example, a mixture of magnetite particles with a size of 0.001-0.05 mm in engine oil, and the magnetisation of the body is chosen so that under the action of the magnetic field of the body the magnetic fluid is a lubricant

SP

49

00

to

; 1l of Meevik when rotating the axle of the hull and was held by the magnetic field on the inner surface of the hull.

The swath works in the following way, the swath is angled at the necessary place permanently on a conveyor belt or mounted on a self-propelled frame, the steam hose and the steam burner are connected to the ends of the serpentine a. The heat of the steam passing through the coil A heats the coil and through the MarHHT fnTO the fluid 5 is transferred to the cylindrical body 1, which contacts the concrete 6. Rolling over the concrete, the roller touches it to the hygroscopic sections of the heated body 1 , thereby performing heat treatment 4 to body 1 and further to the processed material (5 line 6. In addition, the use of magnetic fluid as a heat transfer element of the device allows refusing sealing glands at the junction points of 1-linear body 1 s roofs s 2 and 3 in the bearing assemblies, since the housing 1 is designed as a permanent magnet, holds the magnetic fluid in the gap 5 between it and the coil,

In addition, reducing the mass of the fluid filling the cavity inside the housing (about 10 times as compared with the prototype) allows drastically reducing the thermal energy of the device, which is important when cycling technical equipment for concrete products. At the same time, the implementation of lines to which

023414

4 to body 1 and further to the processed material (5 line 6. In addition, the use of magnetic fluid as a heat transfer element of the device allows refusing of sealing glands at the joints of 1-linear housing 1 with covers 2 and in bearing assemblies 3, since the housing 1, made in the form of a permanent magnet, holds the magnetic fluid 5 in the gap between it and the coil,

In addition, reducing the mass of the fluid filling the cavity inside the housing (about 10 times as compared with the prototype) allows drastically reducing the thermal energy of the device, which is important during cyclical operation of technological lines to which

The singing of the coil B in the form of a cylindrical spiral makes it possible to get a larger (compared to the known roller) 1 ((heat exchange, in connection with which the heat transfer rate from the heat carrier to the processed concrete product increases. In addition, the heat transfer fluid approaches the workpiece, and the presence of a gap between the coil 4 and the corpus 5m 1 makes it possible to carry out the design of the roll so that the coil 4, coil 4, the exit of the ische from the covers 2, are fixed relative to the lower housing 1,

The magnetization of the cylindrical body 1 is selected from the condition in which the body 1 is attracted by the magnetic fluid 5 and the viscous state of the magnetic fluid 5 itself is provided to ensure that the body 1 is 1 (1 capacitor; 51 about the snake ejiHKa 4, while providing Yves of heat transfer from the serpent

five

0

0

five

Claims (1)

JAW also rolls. Invention Formula A roller for heat treatment of the surface of concrete mix products, containing a cylindrical body, in the cavity of which a heater-coil is placed with ends in the form of hollow trunnions, which are supported by means of bearings, so as to reduce thermal the inertia of the roll by increasing the rate of heat transfer from the coolant to the workpiece, the coil is made in the form of a cylindrical spiral, the turns of which are located close to each other and with a gap relative to the cylindrical body, th of magnetically hard ferromagnetic material, and the gap is filled with a magnetic 1 ////// V /// - ////// // /// V // ..