RU2326211C2 - Installation for trenchless construction and replacement of pipelines - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention refers to the sphere of construction machinery and may be used as an installation for trenchless construction and replacement of pipelines to be laid under physical obstacles which may be employed while performing operations related to laying subsurface utility lines under railroads and highways, air fields, building and structures, rivers etc. The installation for trenchless construction and replacement of pipelines consists of a rigid frame, two support plates, a motor assembly including hydraulic cylinders, front and rear cross-members, clamping chuck and control unit of the installation hydraulic system, high pressure hoses for connection to the feeding hydraulic unit. The installation is equipped with a spanner for the bar group screwing together/apart and turning and with spatial orientation support members. The frame consists of two pairs (the lower one and the upper one) pairs of coupling pins with clutches which are rigidly affixed to the support plates. The front and rear cross-members are interconnected via coupling and guide pins. The spanner intended for the bar group screwing together/apart or turning, the clamping chuck for gripping and fixing dismountable bars and spatial orientation supports are hydraulically driven, with the coupling and guide pins between the front and rear cross-members serving as guides for the movable hydraulic tong unit. To facilitate assembly of the installation within the confined space of a standard water conduit or sewage well the assembly is made of prefabricated collapsible modules including accordingly: support plates with spatial orientation elements and lower coupling pins with clutches; pre-assembled front cross-member with the clamping chuck; hydraulic cylinders; coupling and guide pins; rear cross-piece; hydraulic tong unit; operator's platform equipped with a control unit of the installation hydraulic system, upper coupling pins with clutches.

EFFECT: minimisation of time and material expenditures related to construction and replacement of pipelines, minimisation of the manual labour amount, diversification of the range of materials and diameters of the pipes to be laid/replaced.

2 cl, 13 dwg

Description

The present invention relates to the field of construction equipment, in particular to devices for trenchless laying of pipelines under obstacles, and can be used in the construction of underground utilities under railways, roads, buildings, structures, rivers, i.e. objects under which it is impossible or economically inexpedient to conduct work in an open way. The installation can also be used for trenchless replacement of obsolete and worn pipelines laid in the ground with new ones. The problems solved by the present invention are relevant in connection with the state of water supply and sewerage networks in Russia, many of which have been in operation since the 30-50s of the last century, have practically exhausted their service life and require constant repair work or replacement.

Known Russian patents for devices for trenchless laying and replacement of pipelines RU class. E02F 5/18: No. 2189422, No. 2103445, No. 2231600, No. 2160341, No. 2044840. These analogues of the present invention contain a rigid frame, a base plate, a crosshead mounted to move along the longitudinal axis of the frame, gripping mechanisms of sections of the laid pipeline or stacked rods used to pull the laid pipeline, hydraulic cylinders mounted symmetrically relative to the longitudinal axis of the frame and connected to the gripping mechanisms with the ability to move them.

The use of such installations for laying and replacing water supply and sewer routes, despite their technical efficiency, requires a large amount of excavation to trench pits at the installation site due to their relatively large longitudinal dimensions - at least 2 m. For the same reason, they cannot be used in typical water and sewer wells having dimensions of a hatch of 600 mm and rings of the lower chamber of 1200-1500 mm. In addition, the maintenance of these installations requires a lot of manual labor when they are spatially oriented in the pits relative to the axis of the laid or replaced pipeline and in cases where screwed sections of the laid pipeline or rods are used.

The closest in technical essence and the achieved technical result is a device for trenchless laying and replacing pipelines, comprising: a rigid frame with longitudinal and transverse beams; base plate; power unit, including two traverses, mounted with the possibility of moving along the longitudinal beams of the frame and fixing in intermediate positions, gripping mechanisms (clamping chucks) of sections of the laid pipeline mounted on each traverse, power hydraulic cylinders located symmetrically relative to the longitudinal axis of the frame and pivotally connected to the traverse of the installation ; feed hydraulic unit; high pressure hoses for connecting the hydraulic unit to the hydraulic cylinders, the hydraulic control unit of the installation (see, for example, patent RU No. 2128271, class E02F 5/18, publ. 1999).

The known device partially, but inadequately, eliminates the disadvantage of the above-described analogues in terms of dimensions by performing U-shaped recesses on the transverse beams of the frame and traverses. The disadvantages of the known device include: large longitudinal dimensions and, as a consequence, the impossibility of its use in standard wells and a large amount of excavation work when trenching; high costs of manual labor with the spatial orientation of the installation in the pit, fixing the traverses after each cycle of their movement, screwing sections of the laid pipeline or rods. In addition, the presence in the known device of only one base plate makes it difficult or impossible to remove the pipeline from the soil and pull it with the help of stacking rods with high pulling forces, for example, when pulling a new pipeline with the simultaneous destruction of an obsolete or worn pipeline.

The aim of the invention is the creation of such an installation for trenchless laying and replacement of pipelines, which would ensure the exclusion or maximum reduction of work associated with the excavation, including work in standard water and sewer wells, while reducing manual labor costs during installation and operation of the installation and improving its traction characteristics.

The achieved technical and economic effect when using the proposed invention consists in a significant reduction in costs and timelines for laying and replacing pipelines, reducing manual labor, expanding the range of diameters and materials of pipes being laid and replaced by improving traction characteristics.

The essence of the invention lies in the fact that the installation is equipped with a key for screwing or unscrewing and turning the rods, support elements of spatial orientation, a second base plate, and the frame is made in the form of rigidly connected to the base plates of the lower and upper pairs of connecting rods with couplings, the key for screwing unscrewing and turning the rods, a chuck for gripping and fixing the set rods and supports for the spatial orientation of the installation are equipped with a hydraulic actuator, and structurally the installation is made of collecting removable-disassembled modules, including: base plates and lower connection studs with couplings; traverse front assembly with a chuck; hydraulic cylinders; connecting and guide pins for assembling traverses with hydraulic cylinders; traverse back; hydraulic wrench; operator’s platform with the hydraulic control unit of the installation; upper connecting studs with couplings. Base plates, depending on the configuration of the lower chamber of the well or the wall of the pit, can be flat or convex.

Thus, in the present invention, overall limitations are overcome by applying the design of the installation, consisting of quickly assembled and disassembled modules, the dimensions of each of which provide their descent and assembly in cramped conditions of a typical water or sewer well.

The essence of the invention is illustrated by drawings, in which Fig. 1 shows an installation for trenchless laying and replacement of assembled pipelines, performed with convex (radius) plates, Figs. 2-10 show images of the components of the installation - modules and installation at successive stages of assembly , including, in Fig.2 - rigid collapsible frame, in Fig.3 - module 1 of the power unit, including the front crosshead and chuck, in Fig.4 - module 1 and hydraulic cylinders, in Fig.5 - module 1 complete with hydraulic cylinders and a set of connecting and guiding pills, in Fig.6 - the components shown in Fig.5, complete and rear traverse, in Fig.7 - the components of the power block shown in Fig.6, complete and hydraulic wrench, Fig.8 - block the hydraulic system of the installation with the operator’s platform, in Fig. 9 is a general side view, and in Fig. 10 is a general plan view of the installation for trenchless laying and replacement of pipelines assembly with dimensions of the ACP-240 model with a pulling force of 2000 kN.

11 shows a side view of the installation, fixed in the well, at the time of forcing in the ground channel for a new route.

On Fig shows a side view of the installation, mounted in the well, at the time of pulling in the ground a new pipeline.

On Fig shows a view in plan of the installation, fixed in the well, at the time of pulling in the ground a new pipeline with the destruction of the old pipe.

The power unit of the installation for trenchless laying and replacement of pipelines includes a front crosshead 1, hydraulic cylinders 2 and a chuck 3 installed in the bores of the crosshead 1 so that the axis of the chuck 3 coincides with the longitudinal axis of the installation, and the axis of the rods 4 of the hydraulic cylinders 2 are parallel to this axis and are located symmetrically relative to it. By means of connecting and guide pins 5 and nuts 6, the hydraulic cylinders 2 are rigidly fixed between the front yoke 1 and the rear yoke 7. The clamping chuck 3 is also rigidly fixed to the front yoke 1 with pins 8. The rods 4 of the hydraulic cylinders 2 are located in the holes of the front 1 and rear 7 yoke and are equipped with adjustable stops 9. The traverses 1 and 7 are equipped with sling elements for ease of installation, for example, eyelets 10 for gripping by hooks 11. On the connecting and guide pins 5 it is mounted with the possibility of movement along the longitudinal axis installation hydraulic wrench 12, equipped with a handle 13, and the axis of the holes of the key 12 coincides with the longitudinal axis of the installation. Key support elements are made in the form of rollers 14. On the front traverse 1, the hydraulic control unit of the installation 15 is mounted, comprising hydraulic distributors 16 and the operator platform 17. The assembled elements 1-17 comprise a power unit mounted in a rigid installation frame.

The rigid frame includes two base plates 18 with support elements of spatial orientation 19 fixed on them, made, for example, in the form of hydraulic cylinders, the lower and upper pairs of connecting studs 20, rigidly connected to the base plates 18 with the possibility of adjusting the distance between them by means of couplings 21. Adjustable the stops 9 of the rods 4 of the hydraulic cylinders 3 are pivotally fixed in the middle part of the base plates 18. Thus, the power unit is installed in a rigid installation frame with the ability to move the front cross beam 1 and, accordingly but chuck 3 along the longitudinal axis of the apparatus with respect to the base plates 18.

The installation mounted in the well (11-13), is connected by high pressure hoses 22 to the supply hydraulic unit 23 and can be equipped with dial rods 24. In the mode of forcing sections of the pipeline or rods 24 in the ground (11), the front section or rod is equipped tip 25. In the mode of pulling a new pipe 26 in the ground (Fig. 12), an expander 27 is fixed at the front end of the new pipe 26, pivotally connected to the front rod 24. In the mode of pulling a new pipe 26, the old pipe 28 is simultaneously destroyed (Fig. 13) expand on the front For 27 installed cutting knives 29.

Installation of the installation in the well is carried out in the following sequence:

Initially, base plates 18 with spatial orientation elements 19 and a lower pair of connecting pins 20 with couplings 21 are lowered into the well using a hoist (not shown in the drawings) and hooks 11 and base plates 18 are connected by lower studs 20 and pre-set in the well by means of elements 19 and couplings 21. If the base plates do not pass through the hatch of a standard well, then they are collapsible, lowered into the well in parts and assembled in it. Then the front traverse 1 with the clamping chuck 3 fixed on it, the hydraulic cylinders 2, the rear traverse 7 and the connecting and guiding studs 5 are lowered into the well. The hydraulic cylinders 2 are inserted into the boring traverses 1 and 7, after which the traverses 1 and 7 are rigidly connected to each other by means of studs 5 and nuts 6. Further, the stops 9 installed in the threaded holes of the rods 4 of the hydraulic cylinders 2 and previously fully screwed are pivotally fixed to their spherical heads in the middle of the base plates 18. Then, onto the connecting and guide pins 5, a hydraulic key 12 is installed, a hydraulic control unit 15 and an operator platform 17 are mounted on the front crosshead, after which the control unit 15 is connected by hydraulic lines (not shown in the drawings) with hydraulic cylinders 2, a chuck 3, a key 12 and spatial orientation elements 19. Further the upper pair of connecting rods 20 with couplings 21 is lowered and mounted on the base plates with the help of the elements 19 Using the elements 19, the longitudinal axis of the installation is set to the required position, after which the base plates are pressed I to the walls of the well by uniformly unscrewing the stops 9 from the rods 4 and are fixed by means of connecting studs 20 and couplings 21. Then, the hydraulic control unit of the installation 15 is connected by high pressure hoses 22 to the supply hydraulic unit 23 located outside the well.

Installation for trenchless laying and replacement of pipelines works as follows:

- the first (front) rod 24 is lowered into the well in which the installation is mounted, inserted into the chuck 3 and clamped in it, the tip 25 is screwed onto the front end of the rod 24;

- the rod 24 is pushed into the ground or into the old pipe 28 by double strokes of the hydraulic cylinders 2, and when the hydraulic cylinders 2 reverse, the chuck is unclenched, and the last forward stroke of the first rod 24 corresponds to its clamp at the rear end;

- the second rod 24 descends into the well and is screwed with the first rod, clamped by the cartridge 3, by means of a hydraulic wrench 12, after which both rods are pushed through the ground or old pipe 28;

- the operations described above are performed for subsequent rods 24 until the front rod 24 reaches the next receiving well (foundation pit);

- in the receiving well (pit), the tip 25 is removed from the front rod 24, the expander 27 is mounted in its place, on which, if necessary, the old pipe 28 is destroyed, cutting knives 29 are installed, and a new pipe 26 is fixed in the back of the expander 27;

- rods 24, entraining the expander 27 and the new pipe 26, are successively drawn into the ground or into the old pipe 28 towards the installation, the knives 29 destroying the old pipe 28, and the expander 27 forms a channel for the new pipe 26, compacting the soil and pressing into it the remains of an old pipe 28;

- in the process of pulling the new pipe 26, the released rods 24 are unscrewed with a key 12, are lifted from the well and stored, at the end of the pull, the expander 27 is pulled into the well, which is removed from the front end of the new pipe 26 and also lifted from the well.

To avoid the destruction of the walls of the lower chamber of the well or pit by more even distribution of loads, depending on their configuration, the installation is equipped with flat or convex base plates 18.

The achieved effect from the use of the present invention is that, in comparison with known installations of this type, no special foundation pit is required, and work on laying and replacing pipelines is carried out, due to the collapsibility of the structure, in any standard well with a hatch size of 0.6 m and lower chamber 1.2 ... 1.5 m.

Trenchless laying of pipelines can be carried out in any soil, excluding those consisting of more than 50% of stones.

Developed on the design solutions set forth above and manufactured at AVA Hydrosystems CJSC, the ASR-240 model is successfully operating in the city of Tula. The ACR-240 unit develops a pulling force of up to 2000 kN in the pulling mode and is intended for laying new pipes with a diameter of up to 630 mm, including the simultaneous destruction of old pipes. The length of penetration between wells (pits) is 120 m or more.

The assembly and disassembly time of the installation in the well is 2 hours. The attendants are 3 people.

For business contacts we offer the address: St. Petersburg, Kondratyevsky prospekt, house 2. 195009, Anatoly A. Yatskevich. Phone (812) 540-62-20. Email address: ayatskevich@hydrosystem.ru.

Claims (2)

1. Installation for trenchless laying and replacement of pipelines, comprising a rigid frame, a base plate, a power unit including hydraulic cylinders, front and rear traverses, a chuck and a control unit for the hydraulic system of the installation, high pressure hoses for connecting to the supply hydraulic unit, characterized in that it equipped with a key for screwing or unscrewing and turning the rods, a second base plate, support elements of spatial orientation, and the frame is made in the form of rigidly connected with the base plates of the lower and with pairs of connecting rods with couplings, and the front and rear traverses are interconnected by connecting and guide rods, while the key for screwing or unscrewing and turning the rods, the chuck for gripping and fixing the collapsible rods and supports for the spatial orientation of the installation are hydraulically driven, and connecting and guide pins between the front and rear traverses serve as guides of the movable hydraulic wrench, and to enable installation of the installation in cramped conditions Ovia of the space of a standard water or sewer well of standard size, the installation is made of assembled-disassembled modules, including, respectively, base plates with spatial orientation elements and lower connecting rods with couplings; traverse front assembly with a chuck; hydraulic cylinders; connecting and guide pins; traverse back; hydraulic wrench; operator’s platform with the hydraulic control unit of the installation; upper connecting studs with couplings. 2. Installation according to claim 1, characterized in that the base plates, depending on the shape of the well, have a flat or convex shape.

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