FR2574766A1 - DEVICE FOR THE VERTICAL TRANSPORT OF BULK PRODUCTS, IN PARTICULAR MINERAL PRODUCTS - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A DEVICE FOR THE VERTICAL DOWNWARDS TRANSPORT AND FOR STORAGE, MORE SPECIFICALLY FOR THE TRANSPORT OF MINING PRODUCTS MAINLY CONSTITUTES TUBULAR CONDUITS PROVIDED INSIDE A HELICOIDAL RAMP FOR GUIDING THE MATERIAL TRANSPORT. THIS DEVICE IS CHARACTERIZED IN THAT THE TUBULAR CONDUIT 1 HAS A DIAMETER OF AT LEAST 1M AND A HELICOIDAL RAMP 2 WHICH DOES NOT PRESENT IN RIGHT CROSS SECTION NO "EYE" FREE IN THE LINE OF THE LINE AS REGARDS THE RAMP HELICOIDALE 2, THIS HELICOIDAL RAMP 2 SHOWING A SLOPE OF 30 TO 45.

Description

I 2574766

  The present invention relates to a device for 1-

  vertical transport down and for storage, especially for the transport of mining products consisting mainly of tubular

  provided inside a helical ramp for the

of the material to be transported.

  To date, it has been used for a long time

  Vertical downward port of bulk products that result

  1n mining operations, especially in the trans-

  such products, for example in the former

  coal mining, tubular pipes of a di-

  50fmm, provided inside "spirals of guiding

  daqe "which have a slope of 450. The role played by these

  helical guiding spirals placed in the

  tubular is to confer on the current of trans-

  carried a uniform and moderate speed of movement. They therefore constitute means for ensuring a transport of the products during which the grains of the material are 2n formed. Also known for this kind of transport outside such tubular conduits provided with "spirals" or ramps tubular pipes free fall. This type of driving, however, gives the materials transported much higher speeds but they cause

  produces damage that is much more important.

  The use of pneumatic operating means requires the connection of these means to a device for

  such as the one mentioned which could

  a perfect continuity in the food

  transported. This implies the existence of a buffer deposit that can contain a satisfactory quantity of material to be transported by the pneumatic means of the installation

thus fed.

  Devices of the type considered equipped with helical ramps known to date can not offer storage possibilities because the small diameter of the cross section of the tubular pipes on the one hand and the

  nature of the material on the other hand, represent large

  bottlenecks. This implies the need to

  see] the transport device for storage depots sup-

  complementary, with satisfactory capabilities for the

  smooth operation of the facilities.

  A large part of the material transported in bulk by such devices for transport downward vertically, drops freely through the free eye which is located axially in the devices of this type known to date. These falling products damage on the one hand the spiral ramp, they also damage the grains of product and they cause on the other hand, by the shock

  product loaded with a significant amount of kinetic energy

  because of the high fall height, an important

  settlement of the transported product, which facilitates the

  the device. The material transported in this way sees its granulation diminished by this free fall, which makes

  pneumatic transport is much more difficult.

  The device of the present invention solves the problems of downward transport vertically by means of tubular conduits provided within helical ramps, because it proposes such devices characterized in that the tubular conduit has a diameter of at least im and a helical ramp which has in cross section no straight "eye" in the axis of the pipe with respect to the helical ramp, this

  helical ramp with a slope of 300 to 450.

  The purpose of the invention proposed by its new and inventive means is to provide a device of this type which, during the transport of the materials, takes care of the dimensions of the grains of the product transported, because it

  decreases the amount of kinetic energy of these grains

when the material fell.

  It also makes it possible to achieve in the most economical way the association, in a single device, of the

  transport and storage of manipulated materials.

  The combination of these characteristics makes it possible

  in the simplest way, a volume of

  It is largely satisfactory and at the same time ensures an automatic circulation of the material to be transported on the horizontal ramp, in continuation of the storage process in the same apparatus. The slope of the horizontal ramp, between 300 and 450, must be chosen in accordance with the flow possibilities possessed by the material to be transported which are, for example, dependent on the proportion

  components. material that contains arqile.

  Removing the openness of the sec-

  free delivery of the tubular pipe "the eye" axial naked the device of the invnetion does not have allowed to avoid the free fall of the product over long distances. This avoids a reduction in grain size of the transported material and the deterioration of the ramp

  helical, not only useless, but

  sible. The advantageous choice of the slope of the helical ramp

  dale has the effect of dropping the product which breaks the free edge of this ramp without thereby its fears

  can suffer a noticeable decrease. According to the

  characteristic of this device, the product falling from the free edge of the helical ramp returns to the flow of

  product that slides down on it.

  The axial hollow of the spiral ramp being sup-

  award-winning and diameter of the tubular pipe of the device

  of the invention being much larger than that of

  picks of the same type known to date, the presence of gushes

  sets or consoles support the spiral ramp is an important advantage in favor of the proposed device. The technical progress presented by the device proposed by the present application must be considered as being constituted by the fact that it makes it possible to associate the

  possibilities of transporting materials with the possibilities

  trs of storing these materials and this in the most

  in addition to this advantage, this system

  puts a material handling that preserves, the dimensions

  This product is also cronsti-

  killed by the fact that at the same time a much larger charqPgement of the device can be achieved, while avoiding

  advantageously any possibility of congestion dp] a

  duite and the entire installation that makes use of it.

  The attached drawing which is an axial sectional view of the tubular conduit according to the invention, shows an embodiment of the device of the present invention and will be described later in more detail, by way of example

non-limiting.

  The tubular pipe i is intended for transportation ln down vertically and at the same time for storage of

  products resulting more specifically from mining operations

  res. It is provided inside a helical ramp 2. This ramp, according to the invention, does not include in

  the axis of the tubular pipe, a free section, that is,

  to say that it is not provided, in its part that occupies the axial zone of the right cross section of the tubular conduit, any "eye". As shown in the single figure of the drawing and more particularly in this part of the device on which the bulk material is supposed to slide down, the helical ramp 2 has a slope of 30o to 450. Because of this position of the helical ramp 2 relative to the tubular pipe 1 and the increased width of this ramp, especially because of the width also greater, especially at least 1 m, of the pipe in which it is mounted the

  helical ramp 2 is supported by gussets or conso-

  3. As it is clearly shown in the drawing, the material flow carried in bulk 6 goes down for its more

  large part a18 vertically sliding on the helical ramp

  3n dale 2, but a significant amount falls over the edge 5 of the ramp in the form of a parabola free fall 4, without the grain size of the material is

  affected, and this quantity then comes to join the

  rant of material 6 descending, continuing to slide

the spiral ramp 2.

Z574766

Claims (2)

REVENDICATInNS   1.- Device for vertical transport down and for storage, especially for transport   mining products are mainly   tubular conduits provided within a   helical ramp for guiding the transport material   ter, characterized in that the tubular duct (1) has a diameter of at least 1 m and a helicoidal ramp (2W which has in cross section right no "free" eye   ln in the axis of the conduct with regard to the ramp h6li-   coldale (2), this helical ramp (2) having a slope from 300 to 450.   2. Device according to claim 1 characterized   risé in that it comprises gussets or brackets (3) support to support the helical ramp (2) housed in the tubular pipe (1).