SU829814A2 - Device for trenchless laying of pipeline by pressing-through - Google Patents

Description

(54) DEVICE FOR BELTED LAYING OF PIPELINE BY PRESSING

I

The invention relates to the construction of trunk pipelines, namely, devices for trenchless laying of large-diameter pipelines by crushing and horizontal drilling under roads and railways. It can be used in all sectors of the national economy where underground installation of large diameter pipelines is necessary without trenching.

; The closest in terms of technical sushi ing, and the achieved result to the proposed one is a device for trenchless laying of a pipeline by pushing, including its pipe, the cutter element and the housing, which are concentrically located relative to the pipe. In this case, the casing is made of two sections, one of which is mounted on the pipe with the possibility of interleaving, and in the fixed section a seal and a piping system are installed to supply the thixotropic solution and the lining material 1.

The disadvantage of this device is that its operation reduces the pressure of the thixotropic clay solution in the thixotropic shirt due to leakage of the solution into the tube cavity in the expansion zone as a result of cracks in the deformable soil and grooves from moving the hard rocky inclusions with a knife link.

there is also a solution leakage into the gaps between the pipe and the gland seal, formed by passing the annular welds of the pipe sections, and the lack of means to press the gland seal. Reduction in pressure

laziness of the solution in a thixotropic jacket leads to the collapse of the walls of the well, the pipe being pinched by the soil, a sharp increase in friction forces, which, ultimately, reduces productivity. In addition, leakage of the pump, a decrease in pressure can cause a subsidence of the above-ground structures (road bed, rail, etc.) under which the penetration takes place.

The purpose of the invention is to improve the performance of the trenchless installation by eliminating leakage of the solution.

The goal is achieved by the fact that the device has a holder mounted in the cavity of the knife level, and is provided with an elastic cuff, one end of which is rigidly fixed to the holder by means of a bandage, and the other end is freely mounted in the direction of the wellhead, while sealing the stationary section of the casing additionally contains the outer and inner flanges, of which the outer one is mounted for axial movement.

FIG. 1 shows the device, a general view; in fig. 2 shows section A-A in FIG. one.

A device for laying a pipeline contains a power actuator

1 and guiding frame 2, tube 3 placed in the working trench, inventory knife link 4, housing consisting of fixed 5 and 10 MOBILE 6 sections with diffuser 7, holder 8 and elastic cuff 9, one end of which is rigidly fixed on holder by means of bandages 10. and the other end, it is freely installed in the direction of the mouth of the well. In the cavity of the blade level 4, a mounting flange 11 is welded with threaded holes for the traction bolts 12, which are passed through the holes of the internally-o-sliding-shaped 11.11 firing pin 13 rigidly attached to the inner surface of the fixed section 5 mounted on the laid pipeline and the outer the movable flange 14, the traction bolts are supplied with nuts 15. Between the fixed 13 and the movable 14 flaps, a salnik seal 16 is filled. To accommodate this seal, the flanges 13 and 14 are interconnected with fastening bolts 17 and nuts 18. Flanges 13 and 14 and There is an opening through which the mortar pipe 19 passes. To seal the connection of the fixed section 5 with the walls of the developed well, a clay screen 20 is provided in its wellhead, which is placed between the wooden fastener 21 and the rectangular flap 1ts 22.

The device works as follows.

To the place of the constructed transition, the devices are torn off by a working ditch, in which a guide frame is installed

2 and a power drive. Then, the first section of pipe 3 is lowered onto the guide frame 2. At the front end of the pipe 3, an inventory knife link 4 is mounted with a sleeve 8, a sleeve 9 and mounting flanges 11 with threaded holes arranged inside it. At the rear end of the pipe 3 install the fixed section 5 with mortar 19 and gland seal 16, which is pressed against the pipe 3 and the fixed flange 13 using the movable flange 14, bolts 17 and nuts 18. Fixed section 5 is in contact with the end of the reference surface 6. The stationary section 5 and the inventory knife element 4 are interconnected with traction bolts 12, screw them into the mounting flanges 11, and then tighten the nuts 15 until they stop. After checking the direction of penetration and

Properly connecting the knife link 4 and the fixed section 5 with the gland seal 16 to the end of the laid pipe 3 connects the actuator 1, by means of which they insert the knife into the ground of the knife 4 of the link 4 in place with the fixed section 5. When it is finished, ipyHT The knife link 4 and the fixed section 5 at the wellhead mount the following: 1 mount 21 n rectangular fly 22 with a mine screen 20.

The tightness of the device is checked by feeding a thixotropic solution through the solution line 19 into the annulus under working pressure. Killed and leaked from TyTCTBiiH leakage and pressure drop in the device, ots: edip kgg unresponsive link 5 from () lЧJ link 4 by turning the hinge bolts 12 out of the mounting flanges and so on (; The first section of the pipe is 3 g. into the cavity of the proksed pipe; 3 through. the hole of the well. Promotion: tube 3 is to implement ,; until first sek1P1N n (not .1lnostyo: ij, aii; u4ia in an array on the working osvobodivp EEC KoT.ioBaiie.

0 place the second section of the cots-ru-cell1 is put into place and welded to the first section of the pipe. Then, the force from the actuator 1 is applied to the end of this section and the second section is introduced into IpyiiT. By the end of the introduction of the second pipe section)

5, the third is connected and all operatives are turned on until the inventory knife 4 1 {e is released into the receiving pit. After this, the annular npocipa is released; The property of a thixotropic solution, p, is filled with an unorganized solution.

The device .al of the trenchless laying of pipelines of large diameter no1) the wall of sealing the annulus, reduces the consumption of thixotropic rastz.ora, cuts down the idle time for remont

S and eliminates leaks, resulting in increased productivity.

Claims (1)

Invention Formula Device for trenchless laying of the pipeline by forcing through 0 author. ev 478098, characterized in that, in order to improve the performance of the trenchless laying by eliminating leakage of the solution, the device has a clip installed in the cavity of the knife link, and is equipped with an elastic cuff, one end of which is rigidly fixed to the clip by means of bandages, and the other end is freely mounted direction ust svkazhin