SU1138193A2 - Hydraulic screen - Google Patents

Abstract

1. GIDROGROHOT on auth. St. No. 751449, from L and Chu and with the fact that, in order to improve the performance of the hydro screen, by continuously cleaning the sieve and mixing the starting material, sapla to supply water to the cantilever pipes are installed by means of rotating in a vertical plane connections. 2. Hydraulic screening according to Claim 1, characterized in that the nozzles on the swivel joint are arranged symmetrically. 9

Description

"The invention relates to mineral processing, namely to the screening of coal, and can be used to prepare the screening of bulk materials in the coal, mining and metallurgical construction and chemical industries. According to the main author. VN, 751449 is known for a hydro screen, containing a chute with a sieve, water supply nozzles located above the sieve, front louvers with breakers, a loading part of the chute, a hinged leveler, while on the sieve there are installed longitudinal guides in the form of vertically mounted plates with: the ability to move towards one another, and the loading part is provided with a sheet. matched with a sieve, and made tapering at an angle of 10-15. A disadvantage of the known device is low productivity due to clogging of the sieve and insufficient mixing of the material stream. The purpose of the invention is to increase the performance of the hydro screen by continuous cleaning of the sieve and mixing of the starting material. This goal is achieved by the fact that in the hydro-roar of the nozzle for supplying water to the cantilever pipes, the nozzles are installed by means of connections that are rotatable in the tical plane. In addition, the nozzles on the swivel are arranged symmetrically. FIG. shows a crash, general airborne; FIG. 2 is the same, top view. Hydraulic screening chute I C by sieve 2, above which are located nozzles 3 for water supply, mounted on cantilever pipes 4, face louver 5, which are located at the inlet and end of the body of loading part 6 The connecting transverse axis 7, the longitudinal direction to the engine 8, are located inside the groove 1 and the working surface 2, the tray and the pipe 1, the pipe 10. The guides 8 are installed along the side edges of the groove 1 and are made in the form of vertically mounted plates moving towards each other . They are composed of separate transition parts 11, which are 931 connected between the two hinges 12. The number of articulated parts And and, accordingly, the hinges 12 may be different. The longitudinal guides 8 are in-position 13, they allow to constrict and expand (decrease or increase) the total screening surface and provide the opportunity for the hydroarm to work optimally depending on the initial load. The transitional parts 11 of the guides 8 provide the possibility of equipping smooth transitional areas in front of the screening surface, at the beginning of which an acceleration section 14 is formed, which is formed from a sheet. Its length is at least 1/3 of the length of the screening surface and depends on the properties of the screened material and the load. The loading part 6 is 1 L1 with a narrowing angle of 10-15, which ensures a minimum loss of the flow velocity. The nozzles 3 on the cantilever pipes 4 are made tapering and mounted by means of rotary connections 15, while holes 4 are made in the pipes 4, oriented 16 in the lower hemisphere. The nozzles 3 on the swivel joint are arranged symmetrically. Gdrogrohot works as follows. The source material 17 enters the charging part 6, at the beginning of which it is moistened with water from the end blinds 5, and passes under the flow equalizer 18. As it moves along the loading part, the Ht material increases its speed and, due to the narrowing, is intensively mixed with water, and the supply is given. This narrowing angle of 10–15 ensures a minal loss of the flow velocity and creates the necessary turbulence of the flow, ensuring sufficiently effective flooding of the material before size separation on the sieves 2. On the screening surface of the sieve 2, there is a flow separation by size. The large class 19 of the material, along with part of the transport water, is discharged through the upper chute 20 and directed to its destination. Small class 21, passage through the cracks of screen 2, with the rest of the transport water falls

i

into pallet 9 and discharged therefrom for further processing.

At the output of the boot device, i.e. in the acceleration section 14, the preparation of the material for screening is completed. The raw material 17, well-watered with water in the charging part, from the end louver 5 enters the sieve 2,1de under the action of gravity, the hydrodynamic head of the flow and the water jets from the nozzles 3, there is actually an intensive separation of the source material into two classes. Movable lines 8, made with at least two hinged joints 12, adjust the height of the flow by narrowing or widening the moving stream. Experimentally, with the help of guides 8, an optimum working width of the screening surface is determined and a material flow with water of such a height (layer) is formed at which the most

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efficient separation of bulk material. The distance between the guides 8 is also regulated taking into account the load of the source material on the hydro screen.

When water jets exit the nozzles 3 due to reactive force, they are rotated on the pipes 4. In this case, the water jets leaving the nozzles 3 pass along the sieve, block the flow and clean the sieve 2 from the particles stuck in the holes. In addition, the jets of water during their movement along the stream mix it, which also contributes to an increase in the performance of the hydroshield. The orientation of the holes 16 in the lower hemisphere eliminates the flow of water through the nozzles oriented upwards.

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 Installing nozzles for supplying water to cantilever pipes by means of rotating joints in a vertical plane allows an increase in productivity.

// 72 to L7

20 Phage. 2

Claims (2)

1. HYDROGRAHOT by auth. St. No. 751449, because of the fact that, in order to increase the productivity of the hydraulic screen by continuously cleaning the sieves and mixing the starting material, with <hpl for supplying water on the cantilever pipes are installed by means of rotary joints in the vertical plane. 2. Hydro screen by π. 1, characterized in that the nozzles on the rotary connection are located symmetrically. Figure 1 1 11