FI93565C - Bridge transfer equipment - Google Patents

Description

93565

Bridge transfer equipment

The invention relates to a bridge transmission device with which it is possible to control e.g. lateral forces due to transmission applied to the intermediate pillars. The transmission device according to the invention consists of transmission gears comprising a frame, electric motors, reduction gears, a transmission and rollers. The transmission gears are controlled centrally from the control unit.

10 Today, steel bridges, which are pre-assembled elsewhere than at their final location, are transported to the site as special transport. On site, parts are either lifted or often moved to their final position by means of rollers or sliders. The transmission is often powered by a machine from 15 construction sites, such as a mobile crane, bulldozer, etc. In addition, hydraulic cylinders or drive pulleys are used.

In known devices, there is often a problem in how the counterforce required for the work is applied to the environment.

: In implements, power is transmitted to the ground via wheels or bogies, and this requires a flat area in the transfer area, which must be carried. device. Hydraulic cylinders and traction devices are usually light, and thus easy to take to the construction site. Instead, building anchor points for cylinders and traction devices is laborious and expensive. Anchoring the attachments of quite 25 even in places where there are no other structures is problematic. Especially when using cylinders, the transfer may have to be done in many stages, where the movement stops many times and resumes again because the stroke lengths of the cylinders are short. The apparatus according to the invention provides a decisive improvement in the above-mentioned drawbacks. The apparatus according to the invention is characterized by what is stated in the following claims.

In any case, when the bridge is moved into place, the roller 35 must be carefully laid under the bridge before the transfer. By using this roller, a push or brake element 2 93565 tin can be used to push the push / brake device without further action.

By using a sufficiently multiple reduction gear (3000 - 4000), an electric motor can be operated directly instead of 5 hydraulics or pneumatics. This provides several benefits. Avoid e.g. pneumatic condensation problems in cold conditions and hydraulic oil leaks into the environment, and above all, the maneuverability of the engines becomes easier.

10 The intermediate columns of bridges are usually designed only for vertical forces, and when rollers are installed at their ends during transport, especially in the case of high columns, there is a risk of the columns breaking due to the moment caused by the frictional force of the transmission. By equipping these pillars with 15 drive rollers, this bending can be better controlled. Here, the electric motor has a substantial advantage because the cables are easier to pull than with hydraulic or pneumatic hoses. In addition, when speed control is performed for all • · ·. motors with the same frequency converter, the same speed is automatically obtained for all 20 push / brake units.

The invention will now be described in detail with reference to the accompanying drawings.

Figure 1 shows the bridge transfer equipment.

Figure 2 shows the control units of the bridge transfer equipment.

Figure 3 shows one transfer roller.

Fig. 1 schematically shows the bridge transmission apparatus, and in it the number 1 refers to the bridge to be moved. The transfer rollers are marked with number 2 and the control unit ··> 30 with number 3. The bridge columns are marked with number 4 and the cable with number 5.

Figure 2 shows a control unit 3 with 6 stop / start switches. Number 7 is the separate control controls for the motors. The number 8 indicates the basic speed control-35 knob and the number 9 the ammeters.

Figure 3 shows a transfer roller 2, in which the number 10 3 93565 refers to an electric motor and 11 to a reduction gear. The frame of the transfer roller is 12 and the chain transmissions are 13. The rollers are marked with the number 14. The side guide is marked with the number 15.

5 The bridge transfer system operates as follows.

The transfer rollers 2 are placed under the bridge 1, whereby the bridge 1 rests freely on the rollers 2. The control unit 3 has a current consumption meter 9 for each motor, so that a force in the direction of travel can be seen. When all rollers 14 rotate at the same speed, the forces of the individual rollers may change due to friction and other conditions. The cable 5 of each motor 10 is provided with control controllers 7 located in the control unit 3, with which each motor 10 can be stopped momentarily and the generation of forces 15 can be controlled. The adjustment by which the individual motor 10 is momentarily stopped is fully functional, clear and easy, as the large reduction gear 11 (3000-4000) together with the rubberized roller 14 and the upper ends of the intermediate posts 4: displacement / stress formation ratio cause 1-15 sec at a time with a tolerance of several seconds, and the effect can be seen all the time on the gauges 9.

If the speed control is implemented with separate ones. with frequency converters, the control works in such a way that the frequencies of all the motors 10 are initially set to the same by the controller 8 25, and when it is detected from the meters 9 that one motor draws more current than the others, it is corrected. by changing the frequency of the motor by means of a separate control controller 7.

The transfer roller 2 can furthermore be provided with a side guide 15 shown in Fig. 30, 3 which ensures the direct advance of the bridge.

Technically implemented, the apparatus according to the invention can vary considerably. Thus, it is possible to leave the rollers 14 under the bridge 1 as moving elements and 35 to disengage the gears 11 and the motors 10. The frame of the transfer roller 2 can be pillars 4.

Claims (6)

93565 Bridge transfer device comprising transfer rollers (2), a control unit (3) and cables (5), characterized in that the pushing and / or braking force required for transferring the bridge (1) is provided by the transfer roller (2) known per se. with the torque applied to the rollers, whereby the rollers are traction or braking, and that the torque is kept within the prescribed limits by roll-10 adjustment. Bridge transfer device according to Claim 1, characterized in that the pushing / braking force can be deduced from the energy supplied to or obtained from the roller (14). Bridge transfer device according to Claim 1, characterized in that the mutual power ratios of the rollers (14) are changed by momentarily stopping the individual rollers (14). An electric drive bridge transmission device according to claim 1, characterized in that the mutual power ratios of the rollers (14) are changed by changing the frequencies of the individual electric motors (10). Bridge transfer device according to Claim 1, characterized in that the rollers (14) are fastened to the bridge support columns (4) and are left as movement elements by removing the motor (10) and the gearboxes (11). Bridge transfer device according to Claim 1, characterized in that an adjustable side guide (15) is mounted on the transfer roller system (2). • I 93565