DD226193A1 - FOAM GENERATOR - Google Patents

Abstract

The invention relates to a foam generator for foam concrete production in construction. The goal and task is a simple foam generator, which can be produced from cheap, standardized components. The foam generator consists essentially of a compressed-air system, a pressure vessel filled with Verschaeumfluessigkeit, a metering device, T-pieces for separating and uniting Luftdruck- or fluid stream, valves and a Verschaeumrohr segmented in the end section resistance strains. Fig. 1

Description

-3- 659

Drag coefficient of the Verschäumrohres 4, as required by removing segmented resistance carriers 18 from the tail of the Verschäumrohres 4, set.

From the reservoir 5, the desired amount of foaming agent is to be left in the metering device. For this purpose, the closable measuring tube 8 can be opened for accurate determination of the foaming agent. After closing the Meßschlauchventile 10 and the valves 11, the valve 12 is opened to the water supply line 17. Now, the pressure vessel can be filled via the valve 13 with the foaming liquid from the water supply line 17 and metering device 7. Thereafter, the valve 13 is closed. Has built up after switching on the air pressure system 1, the working pressure, begins with the opening of the valve 18, the foam generation. Now is a constant working pressure on the pressure vessel 2 with the Verschäumflüssigkeit and the Verschäumrohr 4 in union of the previously divided air pressure flows through the corresponding T-piece 6 at.

The expansion tube 4 contains segmented, removable as needed resistance member 14 for better adaptability to the compressed air system. 1

Via the valve 9, the metering device 7 can be completely emptied as needed.

The adjustment of the correct pressure conditions of air pressure and foaming liquid to adjust the conventional foam density was carried out via the valves 15 and 16.

By means of sufficiently available, cheaper, standardized components, a virtually maintenance-free, trouble-free foam generator can be produced according to the invention, the robust design of which makes a failure of control devices impossible.

The technology derived from working with conventional devices is considerably simplified by eliminating the following components:

- Foaming liquid pump

- Control technology for the adjustment of the pressure flows

- Time dosing technique

- additional storage tank

- premix container

- Foamer hand pump

- measuring bucket

With the use of a simple, self-cleaning dosage not only eliminates any contact with the foaming agent at the workplace, but it also labor, operating and maintenance costs are saved. In the form of an attachment for each available air pressure system, the foam generator can also be installed on truck transport mixers and leads in addition to the working time to the elimination of the previously used, additional truck, which was equipped with foam generator and premixer, the foam concrete production after storage at the ready mixed concrete mixing station on the Drive to the construction site is possible.

The foam generator is suitable for continuous foam concrete production with the use of two pressure vessels and is characterized by its good adaptability to compressed air systems.

Claims (1)

-2- 659 Invention claim: Foam generator for making foam concrete, characterized in that it comprises a compressed air system (1), a pressure vessel (2) filled with foaming fluid, T-pieces (3, 6) for separating and combining air pressure or liquid flow, a foaming tube (4), a metering device (7) and corresponding valves (9, 10, 11, 12, 13, 14, 15, 16) that the metering device (7) with return (19) for foaming liquid deeper than the reservoir (5) and attached like an outer measuring tube (8) fastened to it can be closed, and that the pressure container (2), which is also provided with outer measuring tube (8), is connected to the water supply line (17) with foaming liquid via the metering device (7), the T-piece (3 ) Is arranged in front of the pressure vessel (2) that a branch to the pressure vessel (2) leads, the other with the T-piece (6) is connected such that a branch of the T-piece (6) to the lowest ge leading point of the container (2) and is connected to the Verschäumrohr (4) with segmented in the end portion resistance carriers (18). For this 1 page drawing Field of application of the invention The invention relates to a foam generator for the production of foam from dilute protein hydrolyzate, as it is used for the production of foam concrete in construction. Characteristic of the known technical solution It is known that the previous foam generators based on the principle of mixing of air pressure flow and liquid pressure flow of the liquid to be foamed before entering a Verschäumrohr with a resistance that almost compensates the working pressure. The existing control technology is primarily designed to bring the liquid flow, which generates a feed pump, and the air flow, the compressors produce, to their intermiscibility on the same pressure level. The patented solutions are fundamentally based on this mode of action. Some fire extinguishers use a modified form of the principle of a spray can. This concerns the WP - 148 858 (A 62 C 25/00) "Extinguisher with liquid extinguishing agent", etc. However, the technology is not suitable for the production of foam concrete. Object of the invention The aim of the invention is to produce a low-cost, uncomplicated foam generator for the production of foam concrete, which requires only minimal service and maintenance. Explanation of the essence of the invention The invention has as its object to produce a foam generator for the production of foam concrete with sufficiently available, cheap and standardized components. Depending on requirements, the foam generator should produce a portionable amount of foam and save on operating and maintenance costs. According to the invention, the object is surprisingly simply achieved in that with technically much simpler means the same effect of foam generation can be achieved. The previously necessary pressure balance between Verschäumflüssigkeitspumpe and compressed air system is eliminated and thus eliminating the Verschäumflüssigkeitspumpe and necessary for this coordination control technology. A pressure vessel according to the invention is pressurized with compressed air without consuming the same in appreciable amount, that a Verschäumflüssigkeitsstrom is generated at its lower outlet, the pressure of which is equal to the Beauflagungsdruck. In addition, this pressure vessel is stored with Verschäumflüssigkeit and allows by using a volumetric dosing the saving of time metering and previously separately entrained storage container for the Verschäumflüssigkeit. The demand for the continuous production of foam concrete with the use of two pressure vessels, which are alternately connected to the metering device for foaming and stored with water / foaming agent over a mutually lockable tee secured by the expansion of the empty pressure vessel via a pressure line in the foam concrete mixing chamber takes place. This movable and handy metering device with return allows to remove foaming agent through a deeper position to the container directly from the thus stored, delivered containers. Since the metering device is arranged durchspühlbar of the water supply pipe and the water metering itself takes place in the pressure vessel, as described, the additional function of the reservoir with outer measuring hose for the already mixing during mixing proportionally foaming, takes place, the metering device is self-cleaning and the whole system extremely light to clean it by flood. The pre-mixing tank entrained in the currently practiced conventional technology as well as the mixing of the foaming liquid via hand pump and measuring bucket on a specially converted truck is eliminated. The expansion tube is provided in its end portion in contrast to the previous solution with segmented resistance carriers that are removable and allow to reduce the Verschäumwiderstand and to allow coordination with smaller compressed air systems. The foam generator consists essentially of: - a suitable compressed air system - A pressure vessel, which also takes over the function of storage of Verschäumflüssigkeit - Two tees for the division or re-assembly of the pressure streams - A segmented in the end section of the expansion tube for better coordination with the compressed air system - A metering device for the foaming agent concentrate - Measuring hoses for exact dosage The invention will be explained below with reference to an embodiment with a pressure vessel 2 in function: 1 shows a schematic drawing of the device, Any suitable air pressure system 1 is used to generate a dividing in T-piece 3 air pressure flow, which presses the foaming liquid from a filled pressure vessel 2 to a part of them in a T-piece 6 again with the other part of the Air pressure flow before entering the Verschäumrohr 4 to unite. From a generally used, mobile as needed reservoir 5, the foam concentrate is left in a metering device 7 with return 19, which is lockable in the line to the water supply line 17 and thus rinsed and cleaned stored. At the metering device 7 and the pressure vessel 2 are closable measuring tubes 8, the one