RU2418224C2 - Combined pipe and concrete application device - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: combined pipe comprises a central pipe, a shell, a circular space with centring skids, formed between the pipe and the shell, plugs with holes, covering the circular space, at that at least one of plugs has several holes, a disk gate to close holes in the plug by its rotation after the circular space has been filled with the concrete mortar. The device of concrete application onto a pipe arranged horizontally or in an inclined manner, comprises a circular form that embraces the pipe and is made of internal, external and two side walls, one of which, facing the plug with the disk gate, has holes; the walls form at least one cavity, having a nozzle for connection of a concrete pipeline, at the same time the device has facilities to press the circular form to the plug, which are made of a bush with a flange fixed at the pipe end and jacks installed on the flange, and facilities of the disk gate rotation.

EFFECT: increased efficiency of combined pipe circular space concrete filling process and reduced pressure of concrete mortar injection.

4 cl, 6 dwg

Description

The invention relates to underwater pipelines, namely, ballast-coated pipes used for offshore pipelines.

Known pipe combined with a ballast coating (patent RU No. 68637 U1 from 03/19/2007), consisting of a Central pipe; a shell mounted coaxially with the central pipe to form an annular space; support-guide device, distributed and fixed on the surface of the Central pipe; ballast material in the annular space; annular concrete plugs with holes in the end sections of the annular space.

There is a method of filling the annular space of an inclined slope located on the pipe lodgement with concrete mortar through a concrete pipe connected to one ring plug (to RU No. 2257503 from 10.22.2003) or to two (plug RU No. 2345267 from 03.19.2007). The disadvantage of this method is the process of filling the annular space with concrete through one hole in the plug or through two holes in two plugs is characterized by low productivity and the need to create a concrete solution with a high pressure concrete pump.

Known devices for applying concrete to a pipe in a horizontal position, having an annular shape, covering a pipe into which concrete is pumped or pumped (US patent No. 2309903 from 07.14.1939, No. 4100751 from 01/31/1977, No. 4898497 from 01/28/1988). Such devices allow concrete to be applied to the pipe at low pressure.

The disadvantage of such devices is that the massive pipe must move through the mold or the massive mold must move through the pipe, which occurs at low productivity of the process.

The technical problem solved by the invention is to increase the productivity of the process of filling concrete annular space of the combined pipe with concrete and reducing the pressure of injection of concrete mortar.

The technical problem is solved in the construction of a combined pipe, consisting of a central pipe, a shell, an annular space with centralizers formed between the pipe and the shell; plugs with holes covering the annular space, while one of the plugs has several holes, a disk shutter for closing the holes in the plug by turning it after filling the concrete with the annular space.

Preferred is the option in which the disk shutter is installed on the side of the annular space of the pipe on the plane of the plug having several holes. In this case, the disk shutter is pressed with concrete mortar to the plug, ensuring tightness after closing the holes.

The technical problem is solved in the design of a device for applying concrete to a pipe located horizontally or inclined, having an annular shape enclosing the pipe with a concrete conduit connected to it, while the annular shape consists of an inner, outer and two side walls, one of which is facing the plug with a disk shutter, has holes; the walls form at least one cavity having a fitting for connecting the concrete pipe, and the device has means for compressing the annular shape to the plug, consisting of a sleeve with a flange fixed to the end of the pipe and jacks mounted on the flange, and means for rotating the butterfly valve.

The annular form may consist of two pivotally connected and fixed on the pipe using clamping means half-molds, each of which has a cavity with a fitting for connecting the concrete pipe.

The preload device can be made in the form of a sleeve fixed to the end of the pipe with a flange and with jacks mounted on the flange.

The combination of features that characterize the combined pipe: at least one of the plugs has several holes, a disk shutter for closing the holes in the plug with its rotation, as well as a combination of features that characterize the device: the annular shape consists of an inner, outer and two side walls, one of which, facing the plug with a disk shutter, has openings; the walls form at least one cavity having a fitting for connecting the concrete pipe, and the device has means for compressing the ring shape to the plug, consisting of a sleeve with a flange fixed to the end of the pipe and jacks mounted on the flange, and means for turning the butterfly valve, - not found in a patent information search, therefore, the invention meets the criterion of "novelty."

Figure 1 shows a pipe combined with a plug installed at one end with openings closed by a butterfly valve and with a device for applying concrete.

In Fig.2 - view A in Fig.1.

Figure 3 - section bb in figure 1

Figure 4 - design of a device for applying concrete in the form of a split ring shape.

Figure 5 is a view of CC in figure 4.

Figure 6 - design of a detachable annular form in the process of its removal from the pipe or installation on the pipe.

The combined pipe (Fig. 1) consists of a central pipe 1, a shell 2, an annular space 3 with centralizers 4, formed between the pipe 1 and the shell 2, a plug 5a with an air outlet 6, a plug 5b with several holes, a disk shutter 7 for closing the holes in the plug 5b mounted on the inwardly facing annular space 3 of the plane of the plug 5b.

The butterfly valve 7 can also be installed on the plane of the plug 5b from the side of the annular shape (option not shown). This design of the pipe 1 allows you to close the annular space 3 after it is filled with concrete mortar, which makes it possible to install and remove the device for applying concrete to the pipe 1.

The device 8 for applying concrete to the pipe 1 (Figs. 1, 3-6), located horizontally or obliquely on the platform 9, consists of an annular form 10 formed by the inner 11, outer 12 and side walls 13a and 13b; the wall 13b faces the plug 5b with a butterfly valve 7; the walls 11, 12, 13a, 13b form at least one cavity 14 having a fitting 15 for connecting the concrete pipe 16, while the device 8 has means 17 for compressing the annular shape 10 to the plug 5b, consisting of a sleeve 18 fixed to the end of the pipe 1 with a flange 19 and jacks 20 mounted on the flange 19, and means 21 (figure 2) of rotation of the disk shutter 7.

Means 21 of rotation are connected to the disk shutter 7 by a cable 22 mounted on a pin 23 mounted on the disk shutter 7.

In an embodiment, the annular form 24 (FIGS. 4-6) consists of two half-forms 24a and 24b, pivotally connected and fixed to the pipe 1 using clamping means 25; each half-mold 24a and 24b has a cavity 26a and 26b with a fitting 27a and 27b for connecting the concrete pipe 16.

For concrete application, the pipe 1 is installed and fixed on the platform 9 assembled with the shell 2 and plugs 5a and 5b at the position of the disk shutter 7, in which the holes in the shutter 7 are aligned with the holes in the plug 5b. Using lifting means (not shown), an annular mold 10 is installed on the end of the pipe 1 from the end cap 5b, then an annular mold means 10 is pressed onto the end of the pipe 1, and the annular mold 10 is pressed against the end cap 5b and a concrete pump (not shown) ) injected into the annular cavity 3 concrete solution. After filling the annular cavity 3 with concrete mortar, first close the hole 6 in the plug 5a, then turn the butterfly valve 7 by means 21, closing the holes in the plug 5b, then release the means 17 for compressing the annular form 10. Remove the annular form if the annular form 24 is installed on the pipe. Then unfasten and remove from the pipe means 17 preload. If the annular form 10 is installed on the pipe 1, then first the clamping means 17 are unfastened and removed, and then, using the lifting devices, the annular form 10 is removed.

If the pipe 1 is left on the platform 9 until the concrete mortar hardens and the concrete is set to the specified strength, then the device 8 is installed on the next pipe 1, prepared for filling with concrete mortar.

If the pipe 1 is transferred to a special section for the hardening of the concrete mortar and the set of concrete with the specified strength, then the next pipe 1, prepared for filling with concrete mortar, is placed on the platform 9 and the device 8 is installed on it.

The proposed design of a combined pipe and a device for applying concrete to it allows several times to increase the productivity of the process of filling concrete with the annular space of the pipe due to the possibility of connecting more powerful concrete pumps and to reduce the discharge pressure of the concrete solution by reducing its resistance to flow through many holes. In addition, productivity is improved by accelerating the process of closing the annular space with a disk shutter and reinstalling the annular form from one pipe to another.

Claims (4)

1. Combined pipe, consisting of a central pipe, shell, annular space with centralizers formed between the pipe and the shell, plugs with holes covering the annular space, characterized in that at least one of the plugs has several holes, a disk valve for closing the holes in the plug by turning it after filling the annular space with concrete. 2. The pipe according to claim 1, characterized in that the disk shutter is installed on the side of the annular space of the pipe on the plane of the plug having several holes. 3. A device for applying concrete to a pipe located horizontally or obliquely, having an annular shape enclosing the pipe with a concrete pipe connected to it, characterized in that the annular shape consists of an inner, outer and two side walls, one of which is facing the plug with a butterfly valve has holes;
the walls form at least one cavity having a fitting for connecting the concrete pipe, and the device has means for compressing the annular shape to the plug, consisting of a sleeve with a flange fixed to the end of the pipe and jacks mounted on the flange, and means for rotating the butterfly valve. 4. The device according to claim 3, characterized in that the annular form consists of two pivotally connected and fixed to the pipe using clamping means of semi-forms, each of which has a cavity with a fitting for connecting the concrete pipe.

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