SU1507921A2 - Suction arrangement for suction dredger - Google Patents

Abstract

The invention relates to the hydromechanization of earthworks and is intended for underwater soil development. The goal - to reduce energy consumption for the development of soil. The device includes a suction pipe 1 with a tip 2 and a nozzle (H) 3 with a grill 4. The tip 2 is connected with the suction pipe 1 with the possibility of rotation around its axis. At the same time, H 3 has partitions (P) 8 located one above the other, attached to the grid 4 and distributed throughout the entire cavity H 3. The cells 9 of the grid 4 are located between P 8. The distance between P 8 is increasing in the direction from the upper generator H 3 to the bottom. Water streams leaking to the cells 9 in the lower part of H 3 erode the soil and carry it away to H 3. The latter is buried in the ground until all H 3 is in the ground. H 3 buried in the ground is used to develop a layer of soil by papillating from left to right and from right to left. 2 Il.

Description

The invention relates to the hydromechanization of earthworks, intended for underwater soil development and is an improvement of the invention according to the author. St. No. 857365.

The purpose of the invention is to reduce energy consumption for the development of the soil.

FIG. 1 shows a device, side view (nozzle and grille are given in section); in fig. 2 - front view grill.

The device consists of a suction head, a pipe 1 with a tip 2 and a nozzle 3 with a grill 4. The suction tip 2 is connected to the suction pipe 1 with the possibility of rotation around the axis of the suction pipe in the support 5, supported by the frame 6 devices 7. The nozzle 3 is provided with partitions 8, common to the entire cavity of the nozzle 3. The forming nozzles 3 and partitions 8 are made along the lines of the current lines. The distance between the partitions is increasing in the direction from the top of the nozzle to the bottom. The grid 4 is made according to the outline of the active suction zone formed around the mouth of the suction tip 2. The grid 4 is made with round cells 9 with a diameter each not exceeding the size of the ground pump bore. The positions also denote the connection 10 of the nozzle 3 with the tip 2 and the connection 11 of the grill 4 with the nozzle 3.

The device works as follows.

They put the device under water, turn on the ground pump. A suction pressure is created in the suction pipe 1, which spreads to the cavity of the suction tip 2 and the nozzle 3, and through the cells 9 and to the water area surrounding them.

Due to the difference between the atmospheric pressure on the surface of the water and the pressure lowered in the cells 9 through the cells 9, a stream of water is generated into the nozzle 3, from it into the tip 2, and from the tip into the suction pipe 1.

Nozzle 3 inlet to the ground. Water jets leaking to the cells 9 in the lower part A of the nozzle 3, erode, carry and carry the soil through the cells 9 into the nozzle 3, which is buried in the soil until the entire nozzle, throughout the curvilinear lattice 4, t . e. from A to B, will not turn in the ground. The nozzle 3, which is buried in the ground, makes the development of a layer of soil with AB thickness by papillating from left to right and from right to left. When papillating from left to right, the suction tip 2 is individually rotated through the transfer device 7 through the transfer device 7 and set to the right.

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so that the lattice 4 was turned to the right, in the direction of the slope of the developed excavation. When papillonization to the left, tip 2 is turned to the left so that the grid is turned to the left. However, the most effective position of the suction device may also be when the lattice 4 is differently positioned relative to the ground slope in the face. Baggermeister makes an attempt to install the handpiece in an effective position by the method of attempts, adjusting the position of the handpiece by turning it with the help of special tool 7.

The physical essence of the soil development process with the suction device is as follows.

When water flows into the cells 9 | There is a collapse of the soil against each cell 9, to the area of the undercut, small in size. Soil between adjacent height cells, for example, in the section BC and CD of the grid 4, collapses and enters the lower section, i.e., is sucked into section 9 in the section CD. Small particles of soil, weighed at the collapse of the soil, fall into the upper cell, i.e., they are sucked into cell 9 in the area of the aircraft. Thus, when the suction device is in operation, no soil suspension is formed; the water in the bottom zone remains clean from suspended matter.

The soil picked up by the flow and delivered to the nozzle 3 through the cell in the aircraft section via the BCCiBi channel formed by the upper BBi nozzle and the partition wall CC | enters the cavity of the suction tip 2. From the movement path to the flow in the channel the ground or water. The soil that entered the cell at the site of the sun can not descend into the cavity of the nozzle 3, since this is prevented by the partition CC |. Threads in the channels,,

The suction capacity through the channels is different: at the top it is higher, at the bottom - below. To align the suction capacity of the channels, their sections are made different. The sections increase in the direction from the top forming nozzle BB. This is achieved by increasing the distance between the partitions 8 as they move away from the upper BB-forming nozzle. Thus, the channel height cannot be taken less than the size of the flow section of the ground pump. The nozzles and partitions 8 forming BBi and AA are made along the outlines of the current lines, thus reducing the pressure loss on the slurry flow in the nozzle channels 3.

After developing a layer of soil, the device is lifted above the ground and washed with water, sucking in water. Thereafter.

if necessary, wash the cells 9 with a reverse flow of water. For this, the ground pump is shut down. The return column of water from the suction pipe 1 washes the cells 9. After the washing, the ground pump is put into operation and the development of the next layer of soil begins.

Claims (1)

Claims of the invention. Suction device for suction dredging by author. St. No. 857365, characterized in that, in order to reduce energy consumption for excavation, the socket nozzles are provided with partition walls located above each other, which are attached to the grid and spread throughout the entire cavity of the nozzle, while the grid cells between the partitions and it is taken to increase in the direction from the top forming nozzle to the bottom. : o o 00 oh oh oh 94yo oh oh R o FIG.