RU2741167C1 - Device for prevention of pipeline damage during its laying in protective case - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: invention relates to construction of main pipelines and pipelines of engineering and technical support networks, in particular, to laying pipelines in sections requiring application of protective cases. Device for prevention of pipeline damage during its laying in protective case contains protective segments, which form closed protective structure on outer surface of pipeline, head with installed in its inner cavity reservoir for lubricating fluid and pump, drive wheel with transfer mechanism connected to the pump, folding retainers fixed on protective segments on the upper and lateral sides of the pipeline and interconnected by tension cables.

EFFECT: described is a device for preventing pipeline damage when it is laid in a protective case.

1 cl, 7 dwg

Description

The invention relates to the field of construction of trunk pipelines and pipelines of utility networks, in particular, to laying pipelines in areas requiring the use of protective cases.

The main problem that arises when laying pipelines in protective cases is to ensure the safety of the insulating coating applied to them during pulling through or pushing these pipelines into the inner cavity of the protective cases.

This predetermines the need to use special devices to prevent damage to pipelines when they are laid in protective cases.

When reviewing the technical literature, a number of technical solutions related to the specified problems were identified.

It is known a support-guide ring for a pipeline containing semicircular segments, the connecting ends of which are bent outward, provided with stiffeners, are interconnected by a detachable bolt connection, damping elements evenly distributed around the circumference of the ring, consisting of a housing with a spring and damping support rollers made of dielectric material, connection of the connecting ends of semicircular segments made on one side in the form of a hinge (patent for a useful model RU 190357, class F16L 7/00, F16L 3/00, publ. 06/28/2019, bul. No. 19).

It is also known a support-guide ring containing segments tightened on the pipeline into rings by means of wedges in the form of flat rods with longitudinal notches varying along its length and a protrusion at one end, supporting elements in the form of ribs located at least one on each segment, segments are made in the form of arcs with three flat elements at one end, a side hole and three mating rectangular holes with internal protrusions-hooks at the other end (patent for invention RU 2700486, class F16L 7/00, publ. 09/17/2019, bulletin No. 26).

The disadvantages of these support-guide rings are: the need to make support-guide rings with a height that requires the appointment of a significant additional increase in the diameter of the protective case;

the possibility of vibration of the pipeline in the sections between the places where the support-guide rings are installed on it during its operation, which can have a negative impact on the strength properties of the pipeline;

the possibility of damage to the insulating coating of the pipeline as a result of its punching by segments of the support-guide rings.

Closest to the claimed invention is a protective rail for a pipeline, containing a rail in the form of a profile molded product made of plastic mass based on polyamide or PVC compound, having a surface in contact when installing the rail on the pipeline with the outer surface of the pipeline and made with regular rows of grooves and protrusions, at least one through hole in the rail, made in the longitudinal direction and filled with a reinforcing material made of a sand-polymer composite (utility model patent RU 17059, class F16L 7/00, publ. 04/12/2017, bull. eleven).

The disadvantages of this protective strip are:

the need to apply significant efforts to overcome the frictional force when laying the pipeline in a protective case;

the absence in the design of the protective rail of vibration compensators of the pipeline during its operation.

The problem solved in the invention is to eliminate these disadvantages by developing the design of a device to prevent damage to the pipeline when it is laid in a protective case, which makes it possible to reduce the required diameter of the protective case, preserve the insulating coating of the pipeline during its installation and operation, fix the design position of the pipeline in a protective case.

The technical result of the invention is to increase the efficiency of laying a pipeline in a protective case and its reliability during operation.

The problem is solved, and the technical result is achieved as a result of the fact that, according to the invention, the device for preventing damage to the pipeline during its laying in a protective case contains protective segments connected to each other in a staggered manner with the formation on the outer surface of the pipeline of a closed protective structure, a head with placed in its inner cavity with a container for lubricating fluid and a pump connected through a transmission mechanism with a drive wheel installed in the lower end part of the head with the possibility of permanent contact with the inner surface of the protective case, folding clamps fixed on the protective segments on the upper and lateral sides of the pipeline, and interconnected by tension ropes passing through them parallel to the pipeline axis.

The invention is illustrated in FIG. 1-7.

FIG. 1 schematically shows a device for preventing damage to the pipeline when laying it in a protective case, a longitudinal section view in the phase of laying the pipeline.

FIG. 2 schematically shows a device for preventing damage to the pipeline when laying it in a protective case, a cross-sectional view in the phase of laying the pipeline.

FIG. 3 schematically shows a device for preventing damage to the pipeline when laying it in a protective case, a longitudinal section view after the completion of the pipeline.

FIG. 4 schematically shows a device for preventing damage to the pipeline when it is laid in a protective case, a cross-sectional view after the completion of the pipeline.

FIG. 5 schematically shows the connection of the guard segments.

FIG. 6 schematically shows the position of the lock after the completion of the laying of the pipeline in the protective case.

FIG. 7 shows a head, a longitudinal section view.

FIG. fig. 1-7, the following designations are used:

1 - pipeline;

2 - protective case;

3 - protective segment;

4 - head;

5 - drive wheel;

6 - transmission mechanism;

7 - folding lock;

8 - tension cable;

9 - bracket;

10 - pump;

11 - container for lubricating fluid;

12 - suction pipe;

13 - discharge branch pipe;

14 - filler neck;

15 - front fixing element;

16 - rear locking element;

17 - loop;

18 - pusher.

The device for preventing damage to the pipeline when laying it in a protective case works as follows.

Protective segments 3 are made of high-strength wear-resistant polymeric materials with durability no lower than the durability of the pipeline. At the ends of each protective segment 3, two protrusions are made on each of its lateral longitudinal sides. The connection of the protective segments 3 with each other is performed by aligning the protrusions at the end of one protective segment 3 with mating grooves between the protrusions of the other protective case 3 and securing the formed connection with a bracket 9. The assembly of the protective segments 3 on the pipeline 1 is performed in a staggered manner, forming on the outer surface of the pipeline 1 a closed protective structure. At the same time, due to the significantly lower height of this closed protective structure in comparison with structures in the form of support-guide rings, they provide the possibility of using pipes of a smaller diameter as a protective case, which contributes to an increase in the economic efficiency of laying pipelines 1 in a protective case 2. On protective the segments 3 from the upper and lateral sides of the pipeline 1 are secured by folding clamps 7, each of which is made of the front 15 and rear 16 fixing elements interconnected by the loop 17 and made with longitudinal slots for passing tension cables 8 through them, while the front fixing element 15 fixed on the protective segment 3 by means of a loop 17. Through the front 15 and rear 16 fixing elements of the latches located in one line parallel to the axis of the pipeline 1, pass the tension cable 8 with the installation on it in front of each rear fixing element 16 of the pusher 18. The head 4 is made with internal n a cavity in which a container for lubricating fluid 11 is placed, in the upper part of which a filler neck is installed 14. In the lower end part of the head 4, a drive wheel 5 is installed, which is made spring-loaded with the possibility of its constant contact with the inner surface of the protective case 2. The drive wheel 5 by the transmission mechanism 6 is connected to the shaft of the pump 10 located in the lower part of the inner cavity of the head 4. The pump 10 is used of a known design for viscous fluids of the rotary, gear or vane type, for example, from among the oil pumps used in automobile engines. The suction pipe 12 of the pump 10 is connected to the bottom of the container for lubricating fluid 11, and the discharge pipe 13 is brought out under the lower part of the head 4. The head 4 is rigidly attached to the end part of the pipeline 1 and the ends of the tension cables 8 are fixed on the outer surface of the head 4.

Through the filler neck 14, a container for lubricating fluid 11 is filled and a pipeline 1 with a head 4 is introduced into the inner cavity of the protective case 2. A mechanism (not shown) is turned on for pulling or pushing the pipeline 1 into the protective case 2. The drive wheel 5 as a result of its contact with the lower part of the inner surface of the protective case 2 is driven into rotation and the resulting torque is transmitted from the drive wheel 5 through the gear 6 to the pump shaft 10. The lubricating liquid through the suction pipe 12 flows from the lubricant reservoir 11 to the pump 10 and then to the pressure head a branch pipe 13, from which it goes outside, under the protective segments 3, fixed by means of brackets 9 in the lower part of the pipeline 1. As a result, the friction force is reduced when the pipeline 1 moves in the protective case 2.

After the completion of the laying of the pipeline 1 in the protective case 2, the mechanism (not shown) is turned off for pulling or pushing the pipeline 1 and alternately pulling first the upper, and then the side tension cables 8 to fix the design position of the pipeline 1. In this case, each of the fixed on the tension cable 8 pusher 18, acting on the rear locking element 16 of the folding lock 7, moves its lower part towards the head of the pipeline 1, while lifting its upper part and, through the loops 17, lifts the upper part of the front locking element 15 until it touches the surface of the protective case 2 As a result, the design position of the pipeline 1 is fixed in the protective case and its vibration during operation is prevented.

Thus, as a result of the implementation of the proposed technical solution, an increase in the efficiency of laying the pipeline in a protective case and its reliability during operation is provided by reducing the required diameter of the protective case, the safety of the insulating coating of the pipeline during its laying and operation, fixing the design position of the pipeline in the protective case.

Claims (1)

A device for preventing damage to the pipeline during its laying in a protective case, containing staggered protective segments connected to each other with the formation of a closed protective structure on the outer surface of the pipeline, a head with a container for lubricant located in its inner cavity and a pump connected through a transmission mechanism with a drive wheel installed in the lower end part of the head with the possibility of permanent contact with the inner surface of the protective case, folding clamps fixed on the protective segments from the upper and lateral sides of the pipeline and interconnected by tension cables passing through them parallel to the pipeline axis.

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