DE7000826U - COMPRESSED AIR PUMP IN PARTICULAR FOR CONCRETE - Google Patents

Description

Patent attorneys;
DIPL.-ING. F. ROSES
DR.-ENG. HH WILHELM
7000 Stuttgart-1

High school fr. 31B Stuttgart, January 12, 1970

-M. 0711/291133 Dr.W / mk

Re: Usage sample registration G 379i / 7a Compressed air pump especially for concrete.

There are various options for pumping liquids using compressed air Systems known which generally include the following parts

- a pump body consisting of several cylindrical chambers, which is provided with automatically acting valves (one for the entry of the liquid substance and one for the on the print side);

a compressed air manifold between the pump body and the compressed air source;

a source of compressed air generally consisting of a compressor.

As is known, this type of pump works well for pumping water-containing substances, sand mixtures and at least those substances that have a high flowability while it is not suitable for pumping concrete, as in this case the following properties are particularly important must be taken into account:

a) The presence of gravel, which can also be of considerable size, which hinders the operation of the usual inlet valves.

b) The high viscosity of the concrete means that the same a rather doughy and non-flowable consistency

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possesses, however, as it is present in aqueous mixtures, so that an inlet valve with a flap plate or the like. is unable to close under pressure, when it's surrounded by concrete.

c) The violent discharge of compressed air from a pump body means that concrete parts are inevitably carried away, which more or less long pipelines have to flow through to the manifold and a rapid clogging of the Pipes and damage to the mechanical parts of the manifold.

From the above, the necessity emerges that a Compressed air pumps for pumping concrete must have special properties in order to reduce those due to the nature of the concrete To avoid deficiency.

The modern compressed air pump for concrete overcomes the identified shortcomings and disadvantages. It consists of two or more chambers with automatic valves for entry and to the outlet of the concrete as well as to the inlet and outlet of the compressed air, from a compressed air source and from a distributor the compressed air between the chambers and the compressed air source and is characterized in that the material inlet valve of each chamber opens laterally and at a considerable distance from the floor and that the externally controlled closure member of the valve is provided with an auxiliary device for cleaning the seat before closing.

Another characteristic of the innovation is that the compressed air inlet and outlet valves of each chamber

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mer also controlled and arranged on the upper lid of the chamber to prevent any concrete particles from being carried along to the distributor.

The control-compliant concrete pump is illustrated using an exemplary embodiment explained in more detail with reference to the drawing.

Fig. 1 shows schematically a two-core pump in section

and
Fig. 2 illustrates a movable concrete pulp with the pump according to the innovation.

The pump shown consists of two cylindrical chambers 1 and 1 ', the lower bottom 2 and 2' of which are closed by large and easily removable plates 3 and 3 ', which allow emptying and, above all, cleaning of the chambers by means of water jets after the pumping process has ended . Each chamber is provided with a concrete ^{inlet valve 4 or 4 1} , which is connected via a line 5 to a loading funnel 6, as well as with an outlet valve 7 or 7 ', which on the one hand to a dip tube 8 or 8' and on the other hand to a Pressure pipe 9 or 9 'is connected, which latter in turn leads to buckets collecting pipe 10. Furthermore, each chamber is provided with a compressed air ^{inlet valve 11 or II 1} and with a compressed air outlet valve 12 or 12 *, the inlet valve being connected via a line 13 to a compressed air source (not shown).

The concrete inlet valves 4 are not in the usual way formed with a pivotable or guided flap, there

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the viscousness of the concrete the closing of a self see Prevent flap wttrd-e. The said valves are on the other hand formed in the manner described below.

In the first place there is each of these inlet valves near the top of the chamber in question, stroke practically in the absence of concrete to work, ds the same,

he
especially if / has a low water content, the pump body hardly fails completely. By appropriately regulating the pulp phases, it is also possible to limit the filling times of the chambers in order to avoid excessive filling of the pulp body even with a relatively small amount of liquid beguiling.

The concrete inlet valve 4 is also arranged horizontally and consists of a piston 14 with a Guwaikopf, whose Front part 15 is made of soft rubber and serves as a cleaning plug for the valve seat, while the actual Valve body 16 the Schliesaon of the valve according to the previous design Cleaning effects. There »open and close of the valve is controlled by a piston 17 which is displaceable in a compressed air cylinder 20, which consists of a t is made of a material that is resistant to wear and tear in the presence of concrete.

The exit valves 7 each consist of one

or · 18 'and have a side, quickly

Flap 19 or 19 ', which allows access to V <

the cleaning of the same with the help of a water jet

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• ·

• ·

t t ■ ««

The compressed air asu is rare for the entrainment of concrete particles avoid which particles would wear the manifold and clog the piping the inlet and outlet of the compressed air in the pump body 1 and 1 'by means of valves 11-11V and 12-12' carried out directly are arranged above the pump body and preferably controlled by means of compressed air, the valve body 23-23 'or 24-24 * are made of rubber and have a control piston 21-21 'or 22-22 * are connected.

To prevent the air, which may contain concrete particles entrains, is discharged directly to the outside, can be connected to the outlet opening 25-25 'of the outlet valve 12-12' be connected a line 26 (Fig.2) with a large diameter, which leads to a container 27, the task of which is both to muffle the sound of the air outlet and to slow down the air outlet. This container is also easily accessible and by means of water jets after the end of the Work washable.

The lower part of the container 27 has a slot 28, through which the remaining particles can escape.

The compressed air distributor consists of a control shaft 33 with control cams 30, 3I ^and 32 and of distributor slides 34 «35 and 36 or 34», 35 'and 36 ·, which are used to operate the valves 11-11' and 12-12 'etc. the piston 17-17 'are necessary. In order to achieve an even flow of concrete, operation is carried out cyclically and with advance adjustment.

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• t · · ■

The entire Puaip unit is preferably on a trolley 37 (Fig.2) arranged, and the pump body with loading hopper 6, which can be provided with an agitator, is tiltable so that it can be swiveled into a horizontal position can · In this way it is possible to quickly wash all parts with jets of water after pumping is finished came into contact with the concrete. After removing the hinged doors 19-19 'of the pressure valves 9-9' and the locking plates 3-3 · the bottoms of the pumping chambers can also be inside easily cleaned.

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Claims (6)

Protection claims 1) Compressed air pump, especially for concrete, consisting of a body formed from two or more closed chambers, inlet and outlet valves for the material to be pumped and inlet and outlet valves for the compressed air in each chamber, as well as a distributor between the pump body and the compressed air source, characterized by it ! that the material inlet valve (4) of each chamber (l) is located on its side wall at a considerable height above the chamber floor and that the closing element (l6) of the valve is controlled from the outside and with an auxiliary element (15) for cleaning the valve seat the closure is provided 2) Pump according to claim 1, characterized in that the Verschußofcgan (l6) of the material inlet valve (4) by a compressed air cylinder (I7) or the like. is controlled and carries a front rubber stopper (15) for cleaning the valve seat before closing. 3) Pump according to claim 1, characterized . that the compressed air inlet and outlet valves (11, 12) are controlled from the outside, for example by means of compressed air cylinders (21, 22) and that these valves are arranged on the upper cover of the chambers in order to prevent or weaken the entrainment of concrete particles into the compressed air lines. -7- 4) Ρ «·» · according to Anapmeh I ₉ thereby the compressed air "eei" # T ^ atil (12) ait sat- AwIiI About a LeitKnft (26) «it Deltapfungsbeitfilter (27) used, white taellm »« it is related alt «in« «seek v> at« m 5) Puoipe according to Anaprttch 1, dadarca gekeaaaeichc ^, since A a single camshaft (33) controls the distribution system ^ e * «ip compressed air inlet and outlet rexraile and of the material part niaje— ■■ til · zykliech, with the named valves tUfli are fastened by compressed air pistons. 6) Pump according to claim 1, the body of the pump can be tilted about an ac | pe the cleaning of the crouching after the end of the meal lighten. la, mm -8th- 700082 «