SU968456A1 - Main airing fan installation - Google Patents

Description

The invention relates to mining industry and can be used to ventilate mines and mines, as well as in other national households for feeding air. spirit in the process units and production facilities.

A fan installation is known, which includes supply and discharge ducts having common walls and located at the same level. In this case, the discharge channels are located between the supply ports, ending with each knee passing into the diffuser. The ventilator installation is made unfrozen and has a combined diffuser. The air jet is switched by means of a ld with a vertical axis from a separate drive connected to the lde.

Each fan has two holes of the discharge channel and one double hole of the discharge channel, with the hole blowing in the open state blocking the openings in the channel walls as part of these walls. The so-called premise l d is connected to the diffuser by a special channel tl.

A disadvantage of the known construction is a large number of ld, of which there are eight in the installation described (not counting the fire-fighting ld in the barrel).

A large number of ld, and, accordingly, the sealing frames, on which lids are pressed, require a considerable consumption of hot-rolled

10 metal. Accordingly, a large number of drives l d equal to the number of the latter, which increases the cost of installation.

In addition, the large number of drives and drives complicates the current

15 maintenance.installation, the process of swapping l d when reversing the AIR flow, as well as when switching from one fan to another is complicated, requires considerable time, the reliability of the system response is insufficient as it depends on the reliable operation of a large number items.

25

The closest to the proposed is a fan installation of airing, which includes a working and a backup fan, the suction and discharge channels of which have common areas and a common diffuser and located one above the other supply channel, switching zones and reversing vents with frames located on common shafts and spatially intersecting C 21 bypass channels.

The disadvantage of the installation is that the arrangement of the diffuser is symmetrical, i.e., on the axis of the installation, it becomes necessary to supply air during reversal through bypass channels located perpendicularly (or at a large angle) to the main channels (supply and discharge j) | The bypass channels have up to 10 turns, which leads to a significant reduction in plant efficiency due to the high resistance to movement of the air flow.

In addition, the design of spatially crossed tsich channels is quite and has 10 turns.

The aim of the invention is to increase the efficiency of the installation.

The goal is achieved by the fact that in a fan unit of the main ventilation, including a working and standby fans, the suction and discharge channels of which have common areas and a common diffuser and located one above the other supply channel, switching zones and reverse vents with frames, placed on common shafts and spatially crossed bypass channels, the inlet channel is located on the same axis with the working fan and diffuser, and the bypass channels are located on the same axis with the standby fan, however, the reversing holes are located at the end of the common portions of the suction and discharge channels, the switching frames being installed mirrored to the reversing frames.

In addition, a common shaft l d is located at the point where the suction and discharge canals converge.

FIG. 1 is a schematic diagram of a fan installation, side view; in fig. 2 shows section A-A in FIG. one. .

Torn valve The main ventilation installation contains a worker 1 and a reserve 2 fans, for example, centrifugal shaft fans with double suction. Since the fans operate on a common mine network, their suction ducts 3 have a common area, namely a common suction channel 4 connected to the inlet channel 5 from the shaft shaft (not shown), and the pressure channels 6 also have a common area, namely common discharge channel 7, which ends with a diffuser 8.

The discharge channels 6 and 7 with a diffuser 8 are placed above the suction channels 3 and 4 and the inlet channel 5, have a common overlap 9 and form a second floor, with the axis of the diffuser 8 and the inlet channel 5 coinciding with the axis of the working fan 1 4 and discharge channel 6.

At the interface of the injection channel 6 with the diffuser 8 and the common suction channel 4 with the inlet channel 5 there are two spatially intersecting bypass channels 10 and 11, one of which,

on the same axis with the discharge channel 6 of the backup fan 2, is its continuation, is connected through the opening 12 to the inlet channel 5, and the second is on the same axis

with the common intake channel 4 of the backup fan 2, being also its continuation, is connected through the opening 13 to the cavity of the diffuser 8.3 where the common suction pipes 4 and the discharge channels 6 converge

switching fields 14 and 15 are used to cut off an inoperative fan 1 or 2, and in the divergence of common suction and discharge channels 4 and 7 there are placed 1 € and 17 reversing fields that serve to change the direction of the air flow (from the mine or into mine

Lines 14 - 17 are made identical both in design and size, and in the scheme of their installation directly in the fan installation of the main ventilation.

Lions 14 and 15 are fixed on one

common shaft and equipped with a drive 18 turn.

The holes 14 and 15 have frames 19 and 20 in the suction duct 3 and the discharge duct 6 of the working fan 1 and the frames 21 and 22 in the suction duct 3 and the discharge duct b of the backup fan 2.

The holes 16 and 17 have frames 23 and 24 in the common discharge channel 7 and the common suction channel 4, as well as frames 25 and 26 in the bypass channels 10 and 11.

PafvM 19-22 l d 14 and 15 shifters are set mirrored to frames 23 26 l l d 16 and 17 reversals.

The installation works as follows ..

Both in the operating mode (suction and in the mode of reversing the air flow (discharge) can

work either fan 1 worker or standby 2 (at the discretion of the attendants).

In any case, the inoperative fan 1 or 2 is cut off from the - operating fan by dam 14 and 15,

for which the holes are turned by the actuator 18 up to the stop, into the frames 19 and 20, or up to the stop into the frames 21 and 22.

In the operating mode, by rotating the rotor, the fan, air from the shaft enters through the supply channel 5, the common suction channel 4, the suction channels 3, branches into two streams and enters the suction boxes of the fan, passes through its impeller and washing the casing and enters the discharge channel 6, then into the common discharge channel 7 and escapes and the atmosphere through the diffuser 8.

The path of the air is shown in solid arrows in FIG. 1 and 2. In this case, the holes 16 and 17 are in the position that overlaps the bypass channels GO and 11, and are pressed to the frames 23 and 24. In the reverse operating mode, the air is forced into the mine) holes 16 and 17 using the drive 18 turns are turned all the way into the frames 25 and 26, thus opening the bypass channels 10 and 11 and blocking the common Suction 4 and the common pressure 7 channels.

As a result, the air through the opening 13 is sucked from the atmosphere into the bypass channel 11, enters the common suction channel 4, and then enters the fan 1 or 2 through the suction channels, depending on which switch is on, the fan passes Into the injection channel b, and then to the common injection channel 7, pass along the bypass channel 10 into the opening 12, the air enters the inlet channel 5 and then is directed to the barrel into the shaft.

The path of air movement in the reversible mode (air injection into the mine is shown in Fig. 1 and 2 with dotted arrows.

Thus, the use as identical devices for both design and installation and rotation angles makes it possible to reduce

the amount of installation work; reducing the number of turns of the air jet from 10 to 5 reduces the unproductive loss of depression by more than half.

The invention allows to operate installations with higher efficiency, simplifies operation, equipment repair and maintenance.

ten

Claims (2)

1. Ventilator of the turntable installation of the main ventilation, including working and standby fans, the suction and discharge channels of which have common areas and a common diffuser and located one above another supply channel, switching ports and reverse sections with frames located on common shafts, and spatially intersecting bypass channels, 5 that, in order to increase efficiency in the installation, the supply channel is located on the same axis as the working fan and diffuser, and the bypass channels are located on the same axis as the standby fan, while The 0 l reversal ducts are located at the end of the common portions of the suction and discharge channels, with the switching frame being set mirrored to the reversing frame. five 2. Ventilator installation according to claim 1, characterized in that the common shaft l is located at the convergence point of the suction and discharge channels. 0 Sources of information taken into account in the examination 1. Kovalevska V.I. Spivak V.A. The driver of the fan installation. M., Nedra, 1979, p. 128-130, fig.49. five 2. USSR author's certificate on application 2892843, cl. E 21F 1/00, 1980 (prototype.