CN201180559Y - Foam generator for coal mine dedusting - Google Patents

Abstract

A foam generating device used for coal mine underground dust removal mainly comprises a cylinder, a venturi, a spoiler, balk boards and other parts, wherein the cylinder is cylindrical; the venturi is arranged in the cylinder, and a certain number of air inlet small holes are uniformly formed on the diffusion section thereof; the spoiler is a hollow cone, and is horizontally placed in the space of the venturi, a diffusion tube, and fixed on the cylinder through a support; a plurality of small holes are formed on the surface thereof; and baffle plates and the balk boards are arranged at the rear end of a foam maker. Gas enters the foam maker via the side surface of the cylinder of the foam maker; a foam liquid flows into the foam maker via a pipeline at the front end of the foam maker, and passes through the throat of the venturi, and the flow velocity is increased, so as to form a jet; the gas uniformly enters the foam maker via the small holes on the diffusion section of the venturi, and passes through the spoiler and a plurality of balk boards so as to fully mix the gas with the liquid and produce the two-phase foam. The foam generating device has the advantages of stable structure, convenient use, light weight, small volume, no jam and good foaming effect.

Description

A kind of colliery dedusting foam-making apparatus

Technical field

The utility model relates to a kind of foam-making apparatus, especially relates to the foam-making apparatus that a kind of coal mine dedusting is used,

Background technology

The per pass operation of coal mine operation all produces with a large amount of dust, and workman's operation in this environment will suck a large amount of dust, serious harm workman's physical and mental health.Present about 260,000 people of pneumoconiosis patient of China's coal-mine industry, and with annual 5000 people's speed increase, annual nearly 3000 people die from pneumoconiosis, have brought great misery for patient and family thereof, have also caused enormous economic loss to country.Be the effectively preventing Mine Dust, the foam dust-removing that just begins one's study of external the seventies, the key technology of foam dust-removing is exactly a foam maker.

At present, use more two-phase foam maker and surely belong to net formula foam maker, and it is widely used in industries such as fire-fighting, oil.The net formula foam maker that uses adopts gas directly to enter foam maker by pipeline at present, the liquid film of advertising on the foam screen foams, and the normal compressed air that uses high pressure, high flow rate can cause air-flow too violent under the coal mine, the liquid film that dispels or atomize reduces coefficient of foaming; In addition, existing net formula foam maker adopts shower nozzle to reach the purpose of even dispersing liquid more; Often contain impurity in the mine water of colliery, cause spray nozzle clogging easily, influence is used; The nozzle and the fixed distance between the foam screen of net formula foam maker inside are constant, but in the use, the pressure of liquid not simultaneously, the range of nozzle is different, therefore causes the film forming efficiency of liquid on foam screen different, influences foaming effect.So, be necessary at applied environment special under the coal mine and condition, design a kind of novel foam maker.

The utility model content

The utility model purpose is at the deficiency in the prior art, provides a kind of simple in structure, little, in light weight, the difficult obstruction of volume, the colliery dedusting foam-making apparatus that foaming effect is good.

For achieving the above object, the technical solution adopted in the utility model is: it comprises cylindrical shell, air inlet pipe, the air inlet aperture of offering on Venturi tube and the Venturi tube diffuser, described cylindrical shell is made of venturi socket, the foam obstacle tube and the tail pipe that are connected in venturi socket two ends respectively by flange, in the diffuser of described Venturi tube, be fixed with a flow spoiler, flow spoiler is fixed in the connection place of venturi socket and foam obstacle tube by fixed support, is interval with the polylith balk board that interleaves up and down in the foam obstacle tube.

Described flow spoiler is a hollow cone, and the conical surface is corresponding with the diffuser of Venturi tube, has several apertures on it.

The utility model makes full use of the characteristics of compressed air high-voltage high-speed, and the flow spoiler of cone is set in the Venturi tube cylindrical shell, makes gas-liquid formation turbulent flow, gas-liquid mixed become bubble to combine together.The air inlet pipe air inlet pipe of Compressed Gas through being located on the cylindrical shell enters cylindrical shell, and evenly enters through venturi diffuser air inlet aperture, avoided gas too fierce, disperses uneven.For avoid the part foam solution not and gas fully mix, be provided with some balk boards in the foam maker rear end, balk board is arranged crosswise at a certain distance.The foam of so preliminary generation and the foam solution that do not have foaming are under the effect of air-flow, and when flowing through balk board, gas-liquid is further fully mixed, and has improved foaming effect.This device does not need to use the shower nozzle can direct blebbing, has avoided the susceptible to plugging problem of shower nozzle, and whole apparatus structure compactness, volume be little, in light weight, it is simple to use, foaming effect is good, has practicality widely in the present technique field.

Description of drawings

Accompanying drawing is the colliery dedusting of a utility model foam-making apparatus structure sectional view.

Among the figure: venturi socket-1, air inlet pipe-2, flow spoiler-3, Venturi tube-4, air inlet aperture-5, fixed support-6, tail pipe-7, balk board-8, foam obstacle tube-9, sealing mat-10.

The specific embodiment

Below in conjunction with accompanying drawing an embodiment of the present utility model is further described:

Shown in the accompanying drawing, whole foaming cylindrical shell is made of venturi socket 1, foam obstacle tube 9 and tail pipe 7, and foam obstacle tube 9 is connected in the front end of venturi socket 1 by flange, and tail pipe 7 is in the rear end that is connected in venturi socket 1 by flange.Be evenly distributed with several air inlet apertures 5 on the passage diffuser surface of Venturi tube 4, be fixed with the flow spoiler 3 of a hollow cone in Venturi tube 4 diffusers, the taper seat of flow spoiler 3 is corresponding with the diffuser of Venturi tube 4, the expansion that is placed on Venturi tube 4 of droping to the ground is calculated in the section, its axis and Venturi tube 4 throat axis are on same horizon, have several apertures on the flow spoiler 3, it is fixed in the connection place of venturi socket 1 and foam obstacle tube 9 by fixed support 6, sealing mat 10 is equipped with in the connection place, is interval with the polylith balk board 8 that interleaves up and down in the foam obstacle tube 9.

Operating principle: foam solution enters from the tail pipe 7 of foam maker cylinder back-end by the road, when Venturi tube 4 throats, static pressure reduces, ram compression increases, form jet, after compressed air enters cylindrical shell through air inlet pipe 2, entrainmenting under the acting in conjunction with gas pressure of liquid jet, evenly enter Venturi tube inside by aperture 5, form gas-liquid mixed stream.Gas-liquid mixed stream impinges upon on the taper seat of flow spoiler 3, and a part of gas-liquid becomes bubble through the aperture above the flow spoiler, and another part gas-liquid impingement flow spoiler 3 backs form turbulent flow, and gas-liquid two-phase is further mixed, and form the part foam.The foam that generates moves forward under the effect of air-flow with the foam solution that does not become to steep, and enters in the foam obstacle tube 9, and through the upset effect of balk board 8 arranged in a crossed manner at interval, gas-liquid is fully mixed, and finally forms uniform foam, flows out through exporting 9.

Claims (2)

1, a kind of colliery dedusting foam-making apparatus, it comprises cylindrical shell, air inlet pipe (2), the air inlet aperture of offering on Venturi tube (4) and Venturi tube (4) diffuser (5), it is characterized in that: described cylindrical shell is by venturi socket (1), the foam obstacle tube (9) and the tail pipe (7) that are connected in venturi socket (1) two ends by flange respectively constitute, in the diffuser of described Venturi tube (4), be fixed with a flow spoiler (3), flow spoiler (3) is fixed in the connection place of venturi socket (1) and foam obstacle tube (9) by fixed support (6), is interval with the polylith balk board (8) that interleaves up and down in the foam obstacle tube (9).

2, dedusting foam-making apparatus in colliery according to claim 1, it is characterized in that: described flow spoiler (3) is a hollow cone, and the conical surface is corresponding with the diffuser of Venturi tube (4), has several apertures on it.

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