RU2601683C1 - Seismic-two stilts movable pipeline support and damper for a seismic-two stilts movable pipeline support - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: group of inventions relates to construction of elevated pipelines. Support consists of a reference table-grid fixed on two stilts through support couplings, with a support movably installed on it, hinged to the support bed. Support bed is dismountably connected to at least one half-yoke and is equipped with a side support plate. On each of the piles at the level of the side support plate of the support bed a damper is installed. Said damper comprises interacting flexible and friction assemblies. Flexible assembly is formed by installed at the ends of at least two rods centred on with a flexible damper. Friction assembly includes friction couplings installed on at least two rods to limit of rod displacement relative to the shell, installed on the pile of the pipeline support. Rods are installed on the shell through the brackets rigidly fixed on it. Between the brackets and rods end sleeve limiters are placed to prevent a contact of the end with the shell.

EFFECT: as a result damping of seismic effect on support pile foundation and pipeline in the preset design modes in horizontal transverse direction is achieved.

9 cl, 3 dwg

Description

The claimed group of inventions relates to the field of construction of elevated pipelines and can be used for elevated pipelines in seismically hazardous areas.

The prior art support pipe [patent for the invention RU 2479779 C2, publ. 04/20/2013, IPC: F16L 3/205], aimed at expanding the possibility of use in conditions of seismic effects on the pipeline. The support comprises a hollow base fixed in the ground, a stand for supporting the pipeline, placed in the base cavity with the possibility of reciprocating movement, support-rotary nodes installed in the upper part of the rack and in the lower part of the base. On the outer surface of the rack between the flanges of the rack and the base, two spiral compression springs with different stiffness and the opposite direction of winding are concentrically placed. The total working force of the springs in their initial position is selected from the condition of maintaining the pipeline, not subject to seismic and other vertical loads. The length of the springs is taken based on the equality of their deformation until the coils touch the maximum possible displacement of the pipeline in a vertical plane. A cylindrical protective casing is installed on the fixing pipe on the support element, covering the outer spring with a gap. The lower edge of the casing in the initial position is located below the base flange.

Also known seismic protection support for the pipeline [patent for invention RU 2391594 C1, publ. 06/10/2010, IPC: F16L 3/205], designed to damp oscillatory processes from seismic effects, vibration and maintain the necessary mobility of the pipeline. The support contains two elastic elements - springs, on which the lodgement rests, a frame consisting of a base and racks and resting on the foundation. A rod with a sliding sleeve is mounted inside each spring, pivotally supported on the frame and passing through an opening in the tool tray. A centering sleeve is concentrically mounted in the hole between the stem and tool tray. Between the upper platform of the centering sleeve and the head of the sliding sleeve, a gap is left, the value of which is determined taking into account the amplitude of the oscillation of the lodgement. Two plates are vertically welded to the lodgement on both sides, to which the brake mechanism is pressed, the force of which is pressed against the lodgement plate is determined depending on the external load.

Closest to the claimed group of inventions in technical essence is a freely movable support [patent for invention US 4128219 A, publ. 12/05/1978, IPC: F16L 1/02, F16L 3/16], which provides the possibility of longitudinal and transverse movement of the pipeline as a result of thermal compression and expansion, as well as seismic effects. The structure is formed by mutually crossed vertically and horizontally oriented supporting rod elements detachably interconnected with the possibility of adjusting the position of the pipeline. The pipeline is covered by rigid clamps fixed to a movable horizontal support element. The design of the support and support unit provides multiple possibility of adjusting the position of the pipeline with its rather rigid fixation. On the piles of the pile foundation, elastic damping devices are installed in the form of square rubber bars with a hole inside.

The disadvantages of the known technical solutions include the lack of adjustment of the location of the damper device in the transverse direction, if necessary, to limit the movement of the pipeline. In addition, the absence of a rigid connection between the piles can lead to deviation of the piles and the fall of the supports during seismic impact and impact of the pipeline with the pillar of the support on the damper mounted on the pile.

The task of the claimed group of technical solutions is to ensure the reliability and functionality of the design when operating in seismically active areas.

The technical result achieved when using the claimed group of inventions is to damp the seismic effect on the pile foundation of the support and the pipeline in the specified design modes in the horizontal transverse direction.

This problem is solved, and the technical result is achieved by the fact that, in accordance with the claimed technical solution, an earthquake-resistant two-piled movable pipe support consists of a support table-grillage mounted on two piles through support couplings with a support sole that is movably mounted on it and pivotally connected to a support lodgement equipped with a lateral support plate of at least one coupling half, detachably connected to the support lodgement. On each of the piles, at the level of the location of the lateral base plate of the lodgement, a damper device is installed containing interacting elastic and friction units. The elastic assembly is formed by an abutment mounted on the ends of at least two rods with an elastic damper fixed to it. The friction unit includes friction clutches mounted on at least two rods, made with the possibility of restricting the movement of the rods relative to the shell mounted on the pile support pipe. The rods are mounted on the shell through brackets rigidly fixed on it. Between the brackets and the stop on the rods are placed bushings made with the possibility of eliminating contact of the stop with the shell.

Also, the problem is solved by the constructive solution of the damper device for the earthquake-resistant double-piled movable support of the pipeline, which contains interacting elastic and frictional nodes. The elastic assembly is formed by an abutment mounted on the ends of at least two rods with an elastic damper fixed to it. The friction unit includes friction clutches mounted on at least two rods, made with the possibility of restricting the movement of the rods relative to the shell mounted on the pile support pipe. The rods are mounted on the shell through brackets rigidly fixed on it. Between the brackets and the stop on the rods are placed bushings made with the possibility of eliminating contact of the stop with the shell.

Friction clutches are mounted on rods through friction linings and bolted.

Brackets rigidly fixed to the shell are made in the form of two cheeks with holes connected by a transverse jumper.

The rods are installed with a gap in the holes of the cheeks of the brackets, between which friction clutches are installed.

The sleeve stops are designed in such a way that their length ensures a guaranteed clearance between the stop and the shell at the extreme position of the rods when they are displaced relative to the shell under seismic action.

The elastic damper is made in the form of a beam of polyurethane or rubber material, which may take the form, for example, of a half-cylinder with a through longitudinal hole

The claimed group of inventions is illustrated by the following drawings.

In FIG. 1 schematically shows a view of a movable support along the axis of the pipeline, on the pile foundation of which a damper device is installed.

In FIG. 2 schematically shows a view of a movable support across the axis of the pipeline, on the pile foundation of which a damper device is installed.

In FIG. 3 is a schematic isometric view of the claimed design of a damper device.

The positions in the drawings indicate:

1 - grill table;

2 - supporting clutch;

3 - pile;

4 - the sole of the support;

5 - half rings;

6 - swivel;

7 - lodgement;

8 - lateral base plate of the lodgement;

9 - half clamp;

10 - damper device;

11 - emphasis;

12 - elastic damper;

13 - shell;

14 - bracket shell;

15 - transverse jumper bracket;

16 - stock;

17 - friction clutch;

18 - bolted connection;

19 - sleeve stop.

The inventive earthquake-resistant two-piled movable support of the pipeline (Fig. 1, Fig. 2) consists of a support table-grill 1, fixed through support couplings 2 using a bolt or welded connection on a pile foundation, including two piles 3. On the support table-grill 1 movably the base of the support 4 is installed. The supporting couplings 2 mounted on piles 3 with a gap are supported by half rings 5 welded to the piles. The sole of the support 4 by means of a swivel joint 6 is attached to the lodgement of the support 7, provided with a lateral support plate 8. At least one half-clamp 9 is fastened to the lodgement of the support 7, securing the pipeline in the lodgement of the support 7. On each of the piles 3 are welded to the pile 3 half rings 5 mounted lateral emphasis in the form of a damper device 10, located at the level of the axis of the pipeline opposite the lateral base plate 8 of the lodgement. In the case of a permissible displacement of the pipeline in the transverse direction and the need to limit its transverse movement according to the strength condition, the lateral gap between the damper device 10 and the lateral support plate 8 of the support cradle is adjusted by extending the rods 16 of the damper device 10.

The inventive damper device (Fig. 3) for an earthquake-resistant two-piled movable pipe support for sections of above-ground laying located in seismically active areas from 7 to 9 points on the MSK-64 scale, belongs to the classes of elastic and friction damper devices. The damper device 10 is made combined and contains interacting elastic and frictional nodes. Under seismic action, the elastic and frictional units interact with each other sequentially: initially the elastic unit is triggered, then the friction unit is configured for a force equal to or slightly lower than the response force of the elastic damper 12 taking into account the friction coefficient of the rod 16 over the friction pad (not shown in the drawings) .

The elastic assembly is formed by an abutment 11 mounted on the ends of at least two rods with an elastic damper 12 mounted thereon, which has the possibility of elastic design deformation upon contact of the pipe support with the damper device 10. The elastic damper 12 is a bar made of an elastic material, for example, polyurethane or rubber. The cross-sectional shape of the elastic damper may be different, in particular, the beam may have a rectangular or semi-cylindrical shape. A bar of elastic material can be continuous or have a through longitudinal hole.

The damper device 10 is installed by the shell 13 on the pile 3, on which the pipe support is installed. Brackets 14, made in the form of two cheeks with holes, are rigidly fixed to the shell 13. Vertically oriented brackets can be reinforced by a transverse jumper connecting them 15. In the holes of the cheeks of the brackets 14, the rods 16 of the damper device are installed with a gap. Two rods 16 of the damper device are located parallel to each other symmetrically with respect to the axis of the pile 3. A guaranteed gap between the rods 16 and the shell brackets 14 ensures the collectability of this connection in the presence of geometric deviations.

The friction unit, designed to limit the movement of the rods 16 relative to the shell 13 mounted on the pile, is a friction clutch 17 made in the form of two half-clamps covering the rods 16. Friction clutches 17 are mounted on rods through friction gaskets (not shown in the drawings) and secured by bolt 18. The magnitude of the tightening force of bolt connections 18 affects the actuation force of the friction assembly of the damper device when the pipe support contacts the damper device. In the particular case of the friction clutch 17 can be installed between the cheeks of the brackets 14. The magnitude of the tightening torque of the bolted joints 18 also affects the actuation force of the friction unit when the friction clutch 17 abuts against the shell bracket 14.

The fastening of the friction clutch 17 on the rods 16 without rigid connection with the shell 13 and the presence of a gap in the holes between the brackets 14 and the rods 16 compensates for geometric deviations of the damper device. The design of the friction unit allows you to adjust the gap between the damper device and the abutment 11 of the support cradle, as well as compensate for the permissible lateral displacements of the pipeline by extending the rods 16 with a loose bolt connection 18 of the friction clutch 17.

In order to limit the movement of the damper device 10 during seismic action between the brackets 14 and the stop 11, the sleeve stops 19 are placed with a gap on the rods 16, which are designed to exclude the stop 11 from contacting the shell 13 and limit, if necessary, the stop stroke 11 from the seismic effect. The length of the sleeve stops 19 provides a guaranteed gap between the stop 11 and the shell 13 at the extreme position of the rods 16 when they are displaced relative to the shell 13 during seismic action, when the sleeve stops 19 abut against the bracket 14 of the shell.

For longitudinally movable supports, the damper device 10 is fed directly to the side support plate 8 without a gap to ensure only longitudinal movement of the pipeline from its temperature deformations, when the length of the pipeline changes due to changes in the temperature of the pipe walls. For freely movable supports between the damper device 10 and the side support plate 8 of the support cradle, there is a gap that allows both longitudinal and transverse movements of the support.

The claimed group of technical solutions works as follows. When carrying out work on laying an elevated pipeline in seismically active areas, the supporting structures of the pipeline are arranged taking into account the possibility of seismic effects, the quality of the soil, its slope, etc.

With the occurrence of seasonal temperature deformations, the lodgement of the support 7 with the pipe laid in it and the sole of the support 4 fixed to it with a swivel joint 6 with the antifriction gaskets installed on it (not shown in the drawings) smoothly slides along the supporting corrosion-resistant surface of the support grill table 1. Sliding occurs only in the longitudinal direction for longitudinally movable supports, and in the longitudinal and transverse directions for freely movable supports. The possibility of these movements is provided by compensation blocks (not shown in the drawings), which are a serpentine pipeline of various shapes.

When seismic effects occur, the pipeline moves freely along its axis. When the pipeline is moved laterally, a dynamic impact of the lateral support plate 8 of the support cradle against the elastic assembly of the damper device 10 is avoided. Direct contact of the metal surfaces of the cradle of the support 7 and piles 3 on which the pipeline support is mounted is thereby eliminated, thereby preventing damage to the pipeline. At the time of impact, when a seismic effect occurs, the elastic damper 12 is compressed. At the same time, the friction unit of the damper device 10 is triggered: the half-clamps of the friction clutches 17 move along the axis of the rods 16 and abut against the arms 14 of the shell. The rods 16 are displaced along their axis in the friction clutch 17, extinguishing the energy of the seismic action due to friction and thereby reducing the load on the pile foundation of the support.

As a result, damping of seismic effects on the pile foundation of the support and pipeline is achieved in the specified design modes in the horizontal transverse direction.

Claims (9)

1. An earthquake-resistant two-piled movable pipe support, characterized in that it consists of a support table-grillage mounted on two piles through support couplings with a support sole that is pivotally connected to the support bed, provided with a lateral support plate of at least one half-clamp , detachably connected to the support lodgement, while on each of the piles at the level of the location of the lateral support plate of the lodgement, a damper device is installed containing interacting elastic and friction nodes, and the elastic node is formed by a stop mounted on the ends of at least two rods with an elastic damper fixed to it, and the friction unit includes friction clutches mounted on at least two rods, configured to limit the movement of the rods relative to the shell mounted on the pile pipeline supports, while the rods are mounted on the shell through brackets rigidly fixed to it, and between the brackets and the stop on the rods are placed bushings made with the possibility of exclusion of contact with the stop shell. 2. A damper device for an earthquake-resistant double-piled movable pipe support, characterized in that it contains interacting elastic and friction assemblies, the elastic assembly being formed by an abutment mounted at the ends of at least two rods with an elastic damper mounted on it, and the friction assembly includes friction couplings, mounted on at least two rods, configured to limit the movement of the rods relative to the shell mounted on the pile of the pipe support, while the rods are installed Lena on the shell through rigidly fixed on her arms and between brackets and emphasis on stocks posted sleeve
limiters made with the possibility of excluding contact of the stop with the shell. 3. The damper device according to claim 2, characterized in that the friction clutch is mounted on the rods through the friction linings and secured by a bolt joint. 4. The damper device according to claim 2, characterized in that the brackets are rigidly fixed to the shell, made in the form of two cheeks with holes connected by a transverse jumper. 5. The damper device according to claim 2, characterized in that the rods are installed with a gap in the holes of the cheeks of the brackets. 6. The damper device according to claim 2, characterized in that the friction clutch is installed between the cheeks of the brackets. 7. The damper device according to claim 2, characterized in that the length of the sleeve stops provides a guaranteed gap between the stop and the shell at the extreme position of the rods when they are displaced relative to the shell under seismic action. 8. The damper device according to claim 2, characterized in that the elastic damper is made in the form of a beam of polyurethane or rubber material. 9. The damper device according to claim 2, characterized in that the elastic damper is made in the form of a half cylinder with a through longitudinal hole.

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