RU35324U1 - AIRLIFT - Google Patents

Description

20051 23970

IPC S021 / 00

AIRLIFT

The utility model relates mainly to the transportation of bulk material, it can also be used to conduct chemical reactions between the bulk material and gas, to cool, heat or dry the bulk material.

Numerous variants of pneumatic transport devices are known, for example, pneumatic mail 1, pneumatic conveyor 2, in which the transported metriap is deflated into a container, which is then sent through the transport pipeline using compressed air in a consumer mode. The disadvantages of the known devices are the need to freeze the transported material into the container and then unload it from the container, in addition, these devices do not provide continuous supply of the transported material, and the device design requires a separate return pneumatic branch for transporting empty containers to the loading point of the transported material.

A known installation for pneumatic conveying of bulk materials, described in 3 and representing a transport pipeline in which the flow of compressed air has a cross-section of a sickle shape. A stream of air conveys bulk material. In the known device, a turbulent air flow is formed in the transport pipeline, which leads to numerous touches of bulk material to the walls of the transport pipeline. When transporting sticky bulk material, this leads to its adherence to the walls of the transport pipeline, therefore, in this case, frequent cleaning of the transport pipeline of adhering bulk material is necessary, which leads to a reduction in consumer properties of the known device.

A device is known for pneumatically conveying bulk material through a pipeline, described in 4, in which the material moving through the pipeline in a gas stream is additionally twisted with tangential jets of gas with an abrasive substance, which

may be a preservative. An abrasive substance cleans the inner surface of the pipeline of loose bulk material adhering to it. A disadvantage of the known device is the need to use an abrasive substance and the need to use a special device to form an air stream that provides cleaning of the inner surface of the pipeline using an abrasive substance. In addition, in the known device, if the abrasive substance is not a preservative, contamination of the transported bulk material with an abrasive substance is inevitable, which requires the use of a special device for separating the transportable bulk material and an active substance. This leads to a decrease in consumer properties due to the narrowing of the scope, since for the separation of bulk and abrasive materials with high efficiency it is necessary that these materials significantly differ in their physical properties, which reduces the number of types of bulk materials for transportation of which you can use the known device .

Closest to the technical nature of the claimed device is an installation for pneumatic feeding of bulk material 5 containing a blower fan connected by an air duct to the air flow former and a transport pipeline of rectangular cross section. The flow former comprises a receiving tray for bulk material and two slotted nozzles that form two air flows moving along the inner surfaces of the opposite walls of the transport pipeline. Bulk material rises up with these two air currents. The disadvantage of the described device is as follows. Transporting sticky bulk material with the help of the known drive 1y installation to adhere to unprotected air currents of the inner surfaces of two walls of a transport pipeline. In addition, the two air streams formed in the known device will be turbulent, which will inevitably lead to a part of the bulk material touching the inner surfaces of those two walls of the transport pipeline along which

air currents, as a result of which sticky bulk material will adhere to the indicated surfaces. Thus, when transporting sticky bulk material using a known device, frequent cleaning of the internal surfaces of the transport pipeline of sticky bulk material is necessary. These factorors lead to a narrowing of the scope of the known device, as a result of which its consumer properties are reduced.

The objective of the utility model is to increase consumer properties by expanding the scope.

The solution to this problem is provided by the fact that in a known device containing a housing, a fan, an air duct and an air flow former, the fan outlet is connected to the air duct inlet, “the following improvements are carried: it additionally contains a conveyor, a separator, a cowl, a trap and a flexible curtain, the casing contains an inlet collector sequentially arranged from bottom to top, a diffuser and a transport pipeline, wherein the area of the lower opening SHK and the area of the upper opening SBK of the inlet the collector is selected from the ratio:

the area $ nd of the lower hole and the area of the upper hole 8 of the diffuser are selected from the ratio:

the inner surface of the transport pipeline is cylindrical, the upper opening of the transport pipeline is provided with a cover, the upper part of the transport pipeline is provided with a first hole mating with a second air duct fixed to the external side of the transport pipeline, the outlet of the second air duct is connected to the fan inlet, to the inner side of the transport pipeline below the first hole the separator is fixed, the transport pipeline is equipped with: the second hole, § of which the trap is fixed, the transport pipeline below the catcher is equipped with a third hole, a conveyor is located in the third hole of the transport pipeline to the internal SHK SBK. (1)

, (2)

A fairing is fixed to the far side of the transport pipeline below the third hole, the third hole of the conveyor exhaust pipeline is equipped with a flexible curtain, the air flow former is made in the form of a grate, height A and thickness B of the grating ribs are selected from the ratio:

and the connection to the mekdu by the input collector and the diffuser and the connection between the diffuser and the transport pipeline are smooth.

The use of an air flow shaper in the form of a lattice with a ratio (3) of a height A and thickness B of its ribs, making the connection between the inlet diffuser and the separator and connecting the separator and the transport pipeline smooth, using a fairing and a flexible curtain leads to the formation of a laminar air flow that transports bulk material with a minimum number of touches of particles of bulk material with the inner surface of the transport pipeline, this allows the use of the claimed device GUT for transporting sticky bulk material, whereby the expanding field of application, resulting in improved consumer properties. When transporting bulk materials with low adherence, the use of the claimed device increases the time interval between cleaning operations on the inner surface of the transport pipeline, which also improves consumer properties.

In the particular case (Clause 2 of the utility model formula), the inner surface of the input collector is made in the form of a rotation surface (Figs. 1 and 2) of the section rotated clockwise by Bernoulli lemniscata, while the Bernoulli lemniscata section is placed in the fourth csgurant and is concluded between the points O and C, and the point O is located at the intersection of the x-axis with the ordinate Y, the coordinates of the point C are deduced from the condition that the first derivative of the lemniscate Bernoulli is equal to zero with respect to the variable X, from two sections of the lemniscate that satisfy these conditions Bernoulli selects the Y axis closest to the ordinate, the axis of rotation of the Bernoulli lemniscate section is parallel to the Y axis, and

A. B. (3)

located to the left of the ordinate Y. and the minimum radius Rmin of the inner surface of the input collector is selected from the relation:

where b is the height of the intake manifold. In FIG. 1 for fafic lemniscata Bernoulli adopted the designation: Y -L (X). Lemniscata Bernoulli 6 is defined in Cartesian coordinates X and Y by the following relation:

(x2 + Yy-2a () 0. (5)

and in polar coordinates the reef:

where a oh

This construction of the intake manifold allows the formation of a laminar air flow with minimal resistance to the movement of the air flow.

In the particular case (item 3 of the utility model formula), the inner surface of the diffuser is made in the form of a truncated conical surface, and a small hole of the truncated conical surface is located in its lower part.

Such a construction of the diffuser eliminates the possibility of distortion in the laminar air flow during its movement from the inlet manifold to the transport pipeline.

The essence of the utility model is illustrated by the description of the candy version of the structural design of the aerial lift and the attached drawings, on which:

FIG. Figure 1 shows a graph of a Bernoulli lemniscate rotated 45 ° clockwise in Cartesian coordinates,

FIG. 2 shows a section of the input manifold;

FIG. 3 shows a longitudinal section of an airlift;

FIG. 4 shows a view of an embodiment of a structural embodiment of an air flow former;

FIG. 5 is a drawing of an embodiment of a flexible curtain.

Rmin b / 2. (4)

r a 2co82f, (6)

Horo of stream 6, trap 7, separator 8 and second air duct 9. The housing contains an inlet manifold 10 sequentially from bottom to top, a diffuser 11 and a transport pipeline 12. The inlet manifold 10 is designed in such a way that relation (1) is satisfied, disc | to |) the pattern 11 is made in such a way that relation (2) is satisfied, the inner surface of the transport pipeline 12 is cylindrical, the upper opening of the transport pipeline 12 is provided with a cover 13. The connection 14 between the inlet collet 10 and the diffuser 11 and connection 15 between the diffuser

11 and the transport pipeline 12 W} | full of smooth. The input manifold 10 may, for example, be a shell, the inner surface of which is made in the form of a lateral surface of a truncated cone.

The upper part of the transport pipe 12 is provided with a first hole mating with the second air pipe 9 fixed to the outer side of the transport pipe 12, the outlet of the second air pipe 9 is connected to the inlet of the fan 1, a separator 8 is fixed to the inner surface of the transport pipe 12, the transport pipe 12 is equipped with below the separator 8 with a second hole in which the trap 7 is fixed, the transport pipe 12 below the trap 7 is provided with a third hole in the third hole TIFA t {nsportnogo conduit

12 is a conveyor 3, a fairing 4 is fixed to the inner surface of the transport pipe 12 below the third hole, the third hole of the transport pipe 12 above the conveyor 3 is equipped with a flexible curtain 5. The air flow former 8 is made in the form of a grill, the height A and thickness B of the edges of the grille of the air flow former are selected from relation (3).

The reduction in the cross-sectional area at the junction of the inlet manifold 10 and the diffuser 11 of the transport pipeline leads to an increase in air velocity at this point (which eliminates the possibility of moving particles of bulk material 16 below the junction of the inlet manifold 10 and the diffuser 11. 6

in the simplest embodiment, as a separator 8, for example, a fabric filter can be used. The fabric filter can be made of a material that has minimal adhesive ability, and a special device can be used to clean the fabric filter by periodically shaking the fabric filter, while the bulk material adhering to the fabric filter falls into the trap 7 and enters the receiving container 17 .

Figure 4 shows a drawing of the shaper air flow 6, made in the form of a lattice, where the following designation is accepted: 18 - edge of the lattice. The height A and thickness B of the ribs 18 of the lattice is selected from relation (3). The cells of the lattice of the shaper air flow 6 can be performed, for example, square, hexagonal or any other shape.

The flexible curtain 5 can be made in the embodiment shown in FIG. 5, where the following designation is adopted: 19 — attachment point of the edge of the flexible curtain 5.

Airlift works as follows. The fan 1 through the second air duct 9 creates a rarefaction in the transport pipeline. The air leaving the fan 1 through the air duct 2 is directed to the desired location. Atmospheric air due to the vacuum created in the transport pipeline passes sequentially through the inlet manifold 10 and the diffuser 11, after which it enters the transport pipeline 12. At the output of the air flow former 6, the air flow is laminar. Conveyor 3 introduces minimal distortion into the air flow due to the fairing 4 and flexible mount 5. The conveyor 3 feeds the bulk material 16 to the lower part of the transport pipe 12 and is transported upwards by Hspiibiiv: by air flow. The separator 6 passes air to the second air duct 9 and delays the bulk material that enters the trap 7. From the trap 7, the bulk material enters the receiving container 17.

1. Installation of pneumatic mail. Auth. testimonial. USSR No. 1761645, prior, from 04.23.90, publ. 09/15/92, IPC 5 B 65 G 51/06.

2. Installation of pneumatic transport. Auth. testimonial. USSR No. 1710467, prior, dated 12.31.87, publ. 02/07/92, IPC 5 B 65G 51 / 04.51 / 22.

3. Installation for pneumatic conveying of bulk materials. Auth. testimonial. USSR No. 1423478, prior, from 01.21.86, publ. 09.15.88, IPC B 65 G 51 / 00-46.53 / 00-66.

4. The method of pneumatic transportation of bulk material through the pipeline. Auth. testimonial. USSR No. 1789465, prior, dated 12.19.90, publ. 01/23/93. Bull. No. 3, IPC 5 B 65 G 53/04.

B. Installation for pneumatic supply of bulk material. USSR patent No. 1771459, prior, from 09.21.90, publ. 10/23/92. Bull. No. 39, IPC5 B 65 G 53/00.

6. Vygodsky M.Ya. Handbook of Higher Mathematics. M .: Nauka, 1976. S. 775-777.

Claims (3)

1. An airlift comprising a housing, a fan, an air duct and an air flow former, wherein the fan outlet is connected to an air duct inlet, characterized in that it further comprises a conveyor, a separator, a fairing, a trap and a flexible curtain, the housing contains an inlet manifold sequentially arranged from the bottom up , a diffuser and a transport pipeline, wherein the area of the lower hole S _nk and the area of the upper hole S _{vk of the} input manifold are selected from the ratio: S _nk > S _vk , _lp area S and the lower opening area S _vd upper opening of the diffuser is selected from the relation S _nd <S _vd , the inner surface of the transport pipeline is cylindrical, the upper opening of the transport pipeline is provided with a cover, the upper part of the transport pipeline is provided with a first hole mating with a second air duct fixed to the external side of the transport pipeline, the outlet of the second air duct is connected to the fan inlet, to the inner surface of the transport pipeline, below the first holes, the separator is fixed, the transport pipeline is equipped with a separator located below and the second hole in which the trap is fixed, the transport pipe below the catcher is equipped with a third hole, a conveyor is located in the third hole of the transport pipe, a fairing is fixed to the inner surface of the transport pipe, the third hole of the transport pipe above the conveyor is equipped with a flexible curtain, the air flow shaper is made in the form of a lattice, the height A and thickness B of the edges of the lattice is chosen from the ratio A >> B, and the connection between the input collector and the diffuser and the connection between the diffuser and the transport pipe are smooth. 2. The airlift according to claim 1, characterized in that the inner surface of the input manifold is made in the form of a rotation surface of a section rotated clockwise by 45 ° Bernoulli lemniscates, and the Bernoulli lemniscata section is located in the fourth quadrant and is enclosed between points O and A, and the point О is located at the intersection of the abscissa X with the ordinate Y, the coordinates of point A are selected from the condition that the first derivative of the Bernoulli lemniscate is equal to zero with respect to the variable X, of the two sections that satisfy these conditions, Bernoulli lemniscates They select the Y axis closest to the ordinate axis, the Bernoulli lemniscate axis rotation axis is parallel to the Y ordinate axis and is located to the left of the Y ordinate axis, and the minimum radius R _{min of the} inner surface of the input collector is selected from the relation R _min = b / 2, where b is the height of the input manifold. 3. Airlift according to claim 1, characterized in that the inner surface of the diffuser is made in the form of a truncated conical surface, and a small hole of the truncated conical surface is located in its lower part.