摘要:
Two-component adhesive-, sealing- or coating compositions are being described which are separately packed, and comprise the component A and the component D, whereby the component A is curing as soon as it gets in touch with water or the component D which contains the curing agent for the component A.The component D can be, or a component B containing an ingredient which is curing at the contact of water, or, possibly, at the contact with the component A, orthe component D can also be a mixture of solid matter and a volatile ingredient which is causing the cross-linking of the component A.The advantage of the novel two-component systems is that the component D is working as a curing agent for the component A, however, a surplus thereof is, or self-curing, or it does not leave a nuissance residue in the cured composition.
摘要:
A bulk material mixer includes a container accommodating a central tube provided with a plurality of lateral inlet openings at various levels. The inlet openings have a cross section which increases from bottom to top so that the inlet openings at the lowest level have a smallest cross section while the inlet openings at the uppermost level have a greatest cross section.
摘要:
A polymeric material having a shielding effect against radiation is provided in the form of a shaped body which may be a plate, flexible sheet, or of any other desired shape, which body consists essentially of a synthetic plastic material including synthetic rubber, or of natural rubber, having distributed therethrough and intimately mixed therewith an effective amount of at least one compound of a saturated fatty acid being solid at room temperature and having at least 9 carbon atoms with at least one metal selected from the group consisting of lead, bismuth, tungsten, zirconium, iron, tin, cadmium, lithium and barium.
摘要:
A conveyor device is used for the pneumatic conveying of bulk material. The conveyor device has a main conveyor pipe and a plurality of bypass conveyor pipe sections which are separate from one another and arranged one behind the other within the latter. The main extent direction of the bypass conveyor pipe sections runs along the main conveyor pipe. The bypass conveyor pipe sections in each case have an inlet opening and an outlet opening for conveyor gas. The inlet opening, when the main conveyor pipe is horizontally installed, is arranged in a cross sectional portion of the main conveyor pipe, which is located above a cross sectional portion of the main conveyor pipe, in which the outlet opening is arranged. The result is a conveyor device, of which the efficiency, in other words the ratio of the conveying power and the conveyor gas quantity used, is improved.
摘要:
Methods and devices for the conveyance of bulk materials by a compressible conveying medium and in the form of discrete plugs from bulk materials in pipes are known. A disadvantage is the high-energy and abrupt expansion of the volume of the conveying medium between the plug being discharged and the one following it at the end of the pipe. This disadvantage may be avoided in that the amount (2') of compressed conveying medium existing in each case between plugs (1') in sequence in the downstream end portion (12b) of the pipe as compared to the amount (2) of compressed conveying medium (2) existing between plugs (1) upstream (at 12a) of the end portion (12b) of the pipe is reduced. This is particularly achieved by converting the long plugs (1) into plugs of reduced length (1'), following each other in reduced spacing.
摘要:
A conveyor device is used for the pneumatic conveying of bulk material. The conveyor device has a main conveyor pipe and a plurality of bypass conveyor pipe sections which are separate from one another and arranged one behind the other within the latter. The main extent direction of the bypass conveyor pipe sections runs along the main conveyor pipe. The bypass conveyor pipe sections in each case have an inlet opening and an outlet opening for conveyor gas. The inlet opening, when the main conveyor pipe is horizontally installed, is arranged in a cross sectional portion of the main conveyor pipe, which is located above a cross sectional portion of the main conveyor pipe, in which the outlet opening is arranged. The result is a conveyor device, of which the efficiency, in other words the ratio of the conveying power and the conveyor gas quantity used, is improved.
摘要:
An apparatus for pneumatically conveying bulk material includes a conveyor line for transporting the bulk material and a secondary line which carries clean gas and is sectionized by spaced three-way/two-way directional control valves. Each control valve is actuated by a pressure transmitter which compares the actual pressure in the conveyor line with the desired pressure in a third line carrying a fluid at a desired pressure decreasing in downstream direction in accordance with the pressure drop in the conveyor line during normal operation. A communication between the conveyor line and the second line is provided by respective branch lines which define the third connection of the control valves and are multiply connected to the conveyor line. Thus, upon encountering a pressure drop in an area of the conveyor line, the respective pressure transmitter actuates the pertaining control valve which shuts off downstream section of the second line and connects the second line with the conveyor line for introducing clean gas into the conveyor line at the desired area thereof.