DE1090562B - Device for the transport of centrally premixed concrete - Google Patents

Description

Device for transporting centrally premixed concrete The central large-scale production of - so-called ready-mixed concrete - has recently become more and more important. One difficulty, however, lies in the fact that segregation and partial setting of the binding agent occur on the, usually considerable, transport routes for fresh concrete. if the concrete is not provided with an additional setting retarder. The solution found was the use of "mobile" large mixers, which take up the entire volume of concrete to be transported, with either only the . Storage and dosing of cement and additives are central, but the mixture and the addition of water are carried out during the journey or at the construction site or the ready-to-form ready-mixed concrete is constantly moved in the so-called agitator during the journey. However, the use of such expensive special vehicles (transport mixers), which have a heavy structure and therefore a low payload and small daily output, complicates the problem of factory-made ready-mixed concrete.

It is already known to dry premixed concrete in simple trucks on? to drive to the construction site, there in a fixed compulsory mixer with the addition of water to mix up. However, this requires its own mixer on each construction site.

According to the invention, however, a device for transport is central premixed concrete to the construction site and for post-mixing at the construction site, if necessary with the addition of water, designed in such a way that a compulsory mixer with rotating Mixing tools on the run-off edge of the loading area of one for transporting concrete Tipping vehicle is arranged, with the mixing trough only a small part of the loading area for the pre-mixed concrete takes to complete, with the loading area through a lockable Opening is connected and even an opening for dispensing the post-mixed concrete mix at the construction site.

The compulsory mixer arranged according to the invention on the tipping vehicle (Discharge mixer) makes the arrangement of its own mixer on each construction site dispensable, but takes up less space than the well-known transport mixers rotating mixing drum or agitators, so that the permissible load weight is only around the low dead weight of the unloading mixer of around 0.2 t is reduced. While the transport is the mix from the unloading mixer through a closure, z. B. a pull-up, adjustable slide, separately. When discharging will the closure is opened so that an access opening is created through which the premixed It gets well into the unloading mixer and emptied according to the tilting tendency. It can be emptied either sideways through a flap on the side wall of the vehicle or via a rear unloading flap, with the last mixing wing the segment screw serving as a mixing tool in a known manner with 180 ° rotation can be arranged. The emptying is expediently carried out via a known discharge chute.

Due to the mixing effected during the discharge, the during the The demixing effect that occurred during transport was canceled. If necessary, can at the same time the required water addition through a water tank of the vehicle are fed.

The invention is explained with reference to the drawing. In the drawing Fig. 1 shows the top view of the rear part of the tipping vehicle with the constructed compulsory mixer, Fig. 2 the associated view with the side removed Unloading flap, FIG. 3 a section along the line C-D of FIG. 1, FIG. 4 a Section along the line A-B of Fig. 3, Fig. 5 is a schematic representation of the Unloading process with the vehicle tipped.

The compulsory mixer used at the rear end of the vehicle exists from a segment worm mounted in bearings 2 in a box-like sheet metal frame 1 with tilt-adjustable mixing blades. The worm shaft is via bevel gears 3 driven by an electric motor 4, which is connected to the usual construction site electricity via a cable or can be operated from a battery.

The mixer is at the rear end of the loading area of a usual Dump truck used and attached to this by screws or claw clamps.

The box frame 1 containing the mixing screw is on one side closed by a slide 5, in the manner of a bulkhead can be pulled out at the top so that the mix transported in the vehicle 117 can enter the unloading mixer. The emptying is then carried out by a side flap 6 or through a rear flap 7.

The slide 5 (bulkhead) is expediently designed so that it when Pulling it up in different positions can snap to a larger one as desired or to release a smaller inlet opening.

The amount of water required for remixing can be obtained from one the vehicle carried water tank 8 (Fig. 5) can be removed.

Claims (5)

PATENT CLAIMS: 1. Device for the transport of centrally premixed praying to the construction site and for remixing at the construction site, if necessary with the addition of water, characterized by a compulsory mixer with rotating mixing tools, with the mixing trough ringing only one at the edge of the loading area of a tipping vehicle used for transporting concrete Part of the loading area for the pre-mixed concrete takes up, is connected to the loading area by a closable opening and itself has an opening for dispensing the post-mixed concrete mixture at the construction site. 2. Device according to claim 1, characterized in that that a side or rear discharge flap for dispensing the post-mixed Concrete is provided. 3. Device according to claim 1 or 2, characterized in that that the opening connected to the loading area .des mixing trough by a pull-up Slider is lockable. 4. Device according to claim 3, characterized in that that the slide (5) can lock in different positions. 5. Device according to claim 1 to 4, characterized by a water tank mounted on the vehicle. Documents considered: German Patent Specifications No. 838 443, 815 162; . USA. Patent Nos 2,703,703, 1,947,345; Journal: Die Bauwirtschaft, 1955, issue 18, pp. 461 to 464.