SU1421834A1 - Apparatus for trenchlless laying of pipelines - Google Patents

Abstract

The invention relates to mining and construction equipment and is intended for trenchless pipe laying during the construction of underground utilities. The purpose of the invention is to increase the efficiency and speed of laying. The device contains a working body (PO) I, which is made in the form of axially and radially displaced knives 2 and 3 relative to each other. Inside PO 1 there is a ground receiver-chamber 4 with a primer 5 and air ducts 7 for supplying compressed air to the nozzles 8 and additional nozzles 9 with an annular nozzle 15. The latter are located in the front part of PO 1. The pressing mechanism introduces RO 1 into the soil, which is destroyed by knives 2 and 3 and is removed from the soil receiving chamber 4 through the conduit 5 from the bottom. The switch I I provides a periodic air supply to the annular nozzle 15 for cutting off the core and the core, which increases the speed of the gasket. 1 hp ff, 4 ill. of (L

Description

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The invention relates to mining and construction equipment and is intended for trenchless pipe laying during the construction of underground utilities.

The purpose of the invention is to increase the efficiency and speed of laying.

FIG. 1 shows a device for trenchless laying of pipelines, air enters the soil receiving chamber, a section; in fig. 2 - the same, air enters the directing pipe; in fig. 3 shows section A-A in FIG. one; in fig. 4 shows a section BB in FIG. one.

The device consists of a working body 1, installed in front of the laid pipe and made in the form of annular knives 2 and 3 displaced one relative to the other in the axial and radial directions. Inside the working body 1 there is a ground receiving chamber 4, the output end of which is connected to the ground lead 5. Inside the receiving ground chamber 4 coaxially with it, the guide nozzle 6 is installed. The input end of the guide nozzle 6 is attached to the front ring knife 3, and the output end is connected to the ground line 5. According to the internal In the soil-receiving chamber 4, air ducts 7 are laid for supplying compressed air to its front part, which end with nozzles 8 and additional nozzles 9. The other ends of the air ducts 7 are connected to the air line 10. The nozzles 8 are directed along the walls of the front part of the soil-receiving chamber 4 to the side the main pipe 5, and the additional nozzles 9 are installed in the front part of the guide nozzle 6 and directed into its internal cavity. At the ends of the air ducts 7, in front of the nozzles 8 and 9, the air flow direction switches 11 are installed. Each switch 11 is connected by means of a pull rod 12 to a control lever 13 mounted on the output end of the guide pipe 6. The cable 12 is installed on the outside of the pipe 6 and on the side of the switch 11 is spring-loaded with an elastic element 14. Placement of additional nozzles 9 in the cavity of the guide pipe 6 are placed in one plane and connected by an annular nozzle 15, which is made inclined at an angle of 60-80 ° to the longitudinal axis of the guide pipe 6 in the course of the core 16.

The device works as follows.

By means of a pushing mechanism (not shown), the pipe 17 together with the working body 1 is inserted into the ground. The soil destroyed by the circular knives 2 and 3 enters the soil receiving chamber 4. Compressed air is supplied to the front of the soil receiving chamber 4 through air ducts 7 connected to air line 10. In the initial position, the nozzles 8 are open and the additional nozzles 9 are closed by switches 11. Compressed air , coming out of the nozzles 8, is moving along the front walls of the chamber 4 in the direction of the primer 5. Passing by the annular knives 3, the air breaks off

small pieces of soil and carries them with them to the subsoil 5, through which everything is carried to the day surface.

The soil enters the guide pipe 6 in the form of a core 16. Moving along the connecting pipe 6, the core touches the control levers 13 and turns them around the point of attachment. Together with the control levers 13, the thrusters 12 attached to them set in motion and turn the switch 11, while compressing the elastic

5, elements 14. As a result, the nozzles 8 are closed and the nozzles 9 are opened. Compressed air from the air ducts 7 flows through the nozzles 9 into the annular nozzle 15, and then into the cavity of the guide nozzle 6. Here the compressed air cuts off the core 16 and pushes it towards the outlet of the nozzle 6, and then into the primer 5, through which it is pushed to the surface. After the core 16 passes the control levers 13, the last 5

under the action of elastic elements 14 and

Legs 12 return to their original position. Together with it, the switches 11 return to their original position, opening the nozzles 8 and closing the nozzles 9. After this, the cycle of operation is repeated.

Q The annular nozzle 15 improves the core break 16, since the compressed air cuts the core-16 simultaneously but its entire circumference. Making the annular nozzle 15 inclined at an angle of 60-80 ° to the longitudinal axis of the guide nozzle 6 in the direction of movement of the core 16 prevents it from clogging up with small particles of soil and reduces the resistance to movement of the core 16 along the guide nozzle 6.

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Claims (2)

1. Device for trenchless laying of pipelines, including a working body in the form of ring knives, a ground receiving chamber, a guide pipe with with the outlet end, the primer and the air duct, which are connected to the front receiving chamber and sent nozzles directed to the pipe nozzle, directed towards the subsoil, characterized by the fact that, in order to improve the economy and speed of the strip, it is provided with additional nozzles placed in connecting tube, and the switch of the direction of air movement for alternately connecting the duct to the main and additional nozzles, 5, the switch is provided with a spring-loaded thrust and a control lever located at the outlet end of the guide tube. 1421834 3 2. The device according to claim., Characterized by that plane and combined around the perimeter that the additional nozzles, installed in a single annular nozzle, directing the nozzle, are located in one 7 Cpf / 2.2 10/7 eleven (Rig. needles eight