SU884779A1 - Loop apparatus - Google Patents

Description

(54) LOOP APPROACH

one

The invention relates to the production of rolled strip and can be used in units of continuous heat treatment and the application of metallic coatings on a strip, such as zinc or aluminum.

Known loopback devices for strips containing a looped and tensioning roller mounted on a carriage, moving freely along the vertical guides of us. These loopback devices operate under normal conditions, i.e. at 20-25 Siv atmosphere of workshop 1.

The disadvantage of these devices is the inability to heat the hot strip in a non-oxidizing environment at a temperature of 400,500 ° C above and also to ensure the normal working conditions of the elements, assemblies and mechanisms of the loop devices at the specified temperature.

Closest to the proposed technical entity is a loopback device for continuous aggregates for processing rolled products, for example, strips, containing a cylindrical vertical plate and a driving carriage installed therein with a frame and a loop-forming roller, whose bearings are mounted on the frame of the carriage 2.

A disadvantage of the known loop device is that the shaft is made non-thermally insulated, as a result of which considerable heat losses in the working zone of the loop device are possible. Trolley mounted

10 on it, the deflecting roller by design cannot ensure the operability of the sub-bearing units of the deflecting roller at 400-500 ° C and higher. The cable for moving the cart at such temperatures is inoperative, since the upper temperature limit of its working capacity is limited (60 ° C). The chain for moving the trolley does not ensure smooth running, which is essential when working with heated lanes.

Claims (2)

The purpose of the invention is to expand the technological possibilities of loopback devices for the strip. This goal is achieved by the fact that in a loopback device for continuous rolling processing units, for example, strips containing a cylindrical vertical shaft and a driving carriage installed therein with a frame and a loop-forming roller, whose bearings are mounted on the frame of the carriage, the shaft is insulated and the carriage it is equipped with a partition transverse to the shaft, below which the bearings for the roller forming roller are installed. At the same time, the trolley drive is made in the form of a winding drum connected to the trolley with a pull tape. FIG. 1 shows a loopback device, longitudinal section, general view; in fig. 2 shows section A-A in FIG. I; in fig. 3 shows a section BB in FIG. 1. The loopback device contains a vertical cylindrical shaft 1 connected to the annealing furnace 2 and the isothermal tempering chamber 3, the shaft 1 is insulated with heat-shielding material 4, such as glass wool, which ensures that the temperature required by the loopback device is preserved. In shaft 1, a driving carriage 5 is installed, on which a loop-forming roller 6 is mounted. The driving carriage 5 is provided with a partition 7 transverse to the mine 1, while the bearings 8 of the loop-forming roller 6 are located on the frame 9 below the transverse partition 7, supporting rollers 10 mounted on the frame 9 and the device 11 for fastening the pull tape 12 to the frame 9. In the upper part of the loopback device, stationary deflection rollers 13 are mounted. The drive 14 is connected by means of a winding bar 15 to the driving cart 5 with the second tape 12.. D eliminating rotationally drive carriage 5 relative to the longitudinal axis of the shaft 1 in the walls of the latter there are longitudinal grooves 16, which can move the support rollers 10 and 17 of the transverse sealing vgstupy septum 7. The device operates as follows. When the drive carriage 5 loaded into the device has a loop-forming roller 6 and a transverse partition 7, the unit performs a vertical reciprocating motion during the operation of the unit, ensuring continuous operation of the annealing furnace 2 when it stops for the period of refilling the drums of the chamber 3 isothermal tempering, 4 Specified tension in the band is provided by an actuator 14, which winds the winding drum 15 into rotation. The latter winds or unwinds the pull tape 12, which is connected to the drive body by the second end 5. An increase or decrease in the reserve of a strip in a loopback device is created by moving the drive carriage 5 up or down and is limited by the difference in speeds of this strip. When entering and leaving the latter from the loopback device. When moving the drive carriage 5 down into the shaft 1, hot protective gas flows from the annealing furnace 2. The transverse partition 7 then acts as a piston. As the drive carriage 5 moves upward, a support is created, and the protective gas is forced back into the annealing furnace 2. In the loop device, it is possible to accumulate bands heated to 400-500 ° C and above in a sealed and heat-insulated working space filled with protective gas, which excludes oxidation of the specified band. At the same time, the bearing assemblies of the loop-forming roller and the traction belt are out of the action of high temperatures, thus ensuring the normal operating conditions of the device. The proposed loop device provides independent operation of the annealing furnace of a long-term isometric tempering furnace at 350-450 ° installed after it, equipped with a bifillary strip rewinding mechanism, with short-term stoppages of the latter (approximately 20 seconds) to recharge the strip on the winding drums occurring through each 0.5 h. During these stops, the heated strip accumulates in the mine I (thermally insulated chamber) of the loopback device, which prevents its cooling and oxidation of its surface. Claim 1. A loopback device for continuous rolling processing units, for example, strips, containing a cylindrical vertical shaft and a driving carriage mounted therein with a frame and a loop-forming roller, whose bearings are mounted on the frame of the carriage, characterized in that the shaft is heat-insulated, and the drive carriage is provided with a partition transverse to the shaft, below which the bearings of the loop-forming roller are installed. 2. The device according to claim 1, of which the drive of the trolley is made 5 times the winding drum connected to the trolley with a pull tape. Sources of information, taken into account during examination HLHXXXXXXXXXXXXXXXXXX CvOOwXJKX C / frTrfWfi / 7Vix Y: fl J yf 1 W /////////// 15 A (rig. / 8847794 1. Copyright sovdetstvo USSR N 336058, cl. B 21 B 41/00, 1971. 2. Mill spiral pipes 150-350 mm. VNIIMETMASH. 1968, hell, N 169100. ///////////// tpuf. / U / 77 /// 7 ///////