Shockproof seismic device

 

(57) Abstract:

Use: in the construction of earthquake-resistant buildings and structures. Shockproof seismic devices used in earthquake-resistant buildings. The device is made in the form of a cylinder with flanges and needle valves, and piston with a through hole in the nozzle. The latter has a cylindrical section in the neck. Needle valves have a sliding fit with the mouth of the nozzle. Needle valve top flange - two-stage. Needle valve of the lower flange forms a gap with the mouth of the nozzle. The upper flange is flexible lifters with deep corrugations. The technical result is increased reliability. 1 C.p. f-crystals, 2 Il.

Shockproof seismic device can be used in the construction of earthquake-resistant buildings and structures.

Known intermediate support of crushable cylinders installed on a slippery Foundation pillows [1].

The disadvantage of this device is the necessity of replacement of the cylinders, which are prone to collapse from shock.

The closest analogue is known shockproof seismic device, containing the through hole [2].

The disadvantage of this device is the lack of reliability of its performance under seismic loads.

The task of the invention is to enhance reliability of the seismic shock device under seismic loads.

The problem is solved by the fact that the through hole of the piston is made in the form of an expanding nozzle with a cylindrical section in the neck, and the lower flange provided with a single-stage needle valve with the ability to enter it into the mouth of the nozzle with a sliding fit, and a needle valve top flange is made of a two-stage, and the diameter of the lower level of the conical needle is less than the internal diameter of the cylindrical section of the neck of the nozzle and forms with it an annular clearance for the free passage of air, and the diameter of the upper level of the needle has a neck sliding fit.

In addition, to reduce the effect of rigid horizontal oscillations on the upper flange of the cylinder is a flexible compensator with deep corrugations, allowing elastic deformation of the walls to enhance the longitudinal impact on the piston.

In Fig. 1 shows a seismic shock device, a vertical section; Fig. 2 on which the flanges 2 and 3 are needle valves - needle 4 and 5, and is located inside the piston 6 with a through hole in the form of an expanding nozzle 7 with a cylindrical neck 8. The upper needle 4 - two-stage, bottom 5 is cylindrical, with the diameter of the thickened portion 9 of the upper needle 4 is equal to the diameter of the lower needle 5, and both of them in the neck 8 of the nozzle 7 form a very small annular gap 10, while the thin end 11 of the upper needle 4 in the neck 8 will create a significant annular gap. Such a device allows the kinetic energy of the piston 6 to operate in a mode reciprocating motion, i.e., not for one cycle.

This device can be applied as a separate intermediate support or be part of a more complex support.

The operation is carried out so. A powerful impetus through the Foundation of the object is transferred to the intermediate support. As a result, instantly, with a large acceleration of the piston 6 will go, compressing the air in the upper cavity and creating a negative pressure in the lower cavity of the cylinder 1, and the compressed air from the upper cavity will flow through the nozzle 7 at the bottom, and expanding, will reduce its pressure and temperature.

With the further rise of the piston 6, when the upper needle 4 will go down in the mouth 8 of the nozzle 7, and Noah part 9 of the needle 4 in the neck 8 of the piston 6 will stop and receiving a negative acceleration from a compressed air cushion and vacuum under the piston 6 will go down, removing the first vacuum under the piston 6, and then will start to compress the air.

Again will begin the process of deceleration of the piston 6 and will end it by stopping it when the lower needle 5 will enter the neck 8 and will reduce to a minimum the escape of air from beneath the piston 6 through the annular gap 10.

Under the influence of the reactive force of the compressed air under the piston 6 and the created vacuum above the piston 6, it can make a repeat cycle of the reciprocating motion, and unstressed falls.

It depends on the mass of the piston 6, the acceleration and the size of the annular gap 10.

On the upper flange 2 may be located in the lifters 12 filled with liquid, comprising welded to the flange 2 of corrugated cylinder 13 with a spherical head 14, which rests in a spherical cap 15, bolted fixtures ROSSVARKA 16. Welded cap 15 has elektrosakaru 17, between the cap 15 and the cylinder 14 is a layer of graphite lubricant 18. The head 14 of the compensator 12 is attached to the upper flange 2 of the cylinder 1 restorative rods 19 with the spring nut is 1 Foundation supports 22 by bolts and can be removed, what you must Unscrew the drain tube 23, rastrapati bolting the cap 15 and the cylinder 1 and tighten the thrust 19.

The lifters 12 must be sufficiently deep corrugations, which will reduce the stiffness of the shock from the bottom due to elastic deformation of the walls of the corrugation under the influence of instantly increasing fluid pressure therein. This "wince device" will lead to a sharp increase in pulse striking force of the piston 6, i.e., to greater absorption of the destructive force of the push.

Under static load, the device will operate as a rigid support with an estimated reserve of strength and stability.

To fill the expansion joint 12 fluid includes a tube 24.

To reduce the temperature in the cylinder 1, it can be made with ribs.

As the lubrication of the cylinder 1 can be applied graphite powder.

The device is so.

Under the action of a powerful impetus to bottom going to happen instantly jump (wince) cylinder 1, which would raise the fluid pressure in the cavity of the compensator 12, under the action of fluid pressure will occur smoothing blow elastic deformation of the walls of the corrugation (Fig. 2 is shown by the dotted line), whna cavity of the cylinder 1, driving it through the nozzle 7 into the lower cavity; at the entrance of the upper needle 4 in the neck 8 of the nozzle 7, the flow of air will be reduced, will start braking of the piston 6, and when in the neck 8 of the nozzle 7 will include a thickened portion 9 of the needle 4, the piston 6 will be thrown down with compressed air to start the reverse process of air movement in the cylinder, and when in the neck 8 of the nozzle 7 of the piston 6 will enter the lower needle 5, he will stop and will again be thrown up by compressed air.

The reciprocating movement of the piston will continue until, until they use up the energy of the impact.

Rigid horizontal oscillations will be softened by the flexibility of the expansion joint 12 with the spherical bearing in the form of a spherical head 14 and the cap 15.

1. Shockproof seismic device containing a cylinder with flanges, the upper of which has a needle valve and is placed in the cavity of the cylinder piston with a through hole, wherein the through hole of the piston is made in the form of a widening nozzle with a cylindrical section in the neck, and the lower flange provided with a single-stage needle valve with the ability to enter it into the mouth of the nozzle with a sliding fit, and needle clap the internal diameter of the cylindrical section of the neck of the nozzle and forms with it an annular clearance for the free passage of air, while the diameter of the upper stage needle has a neck sliding fit.

2. The device under item 1, characterized in that to reduce the effect of rigid horizontal oscillations on the upper flange of the cylinder is flexible lifters with deep corrugations, allowing elastic deformation of the walls to enhance the longitudinal impact on the piston.

 

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SUBSTANCE: method involves arranging drilled cast-in-place pile, grouting plate grillage and installing antivibration mounts. Anchorage reinforcement is placed in pile heads and arranged along marked building axes. Anchorage reinforcement is then grouted and resilient antivibration mounts are installed at pile heads. Resilient antivibration mounts are fixed in plane on anchorage reinforcement with the use of fasteners so that antivibration mounts may perform restricted movement. Installed on antivibration mounts is rigid metal foundation frame of upper building in which anchoring reinforcement for securing skeleton of building to be erected is installed. Reinforcement rods and supply lines are inserted in process orifices formed in foundation frame beams and frame is grouted to form panel grillage.

EFFECT: reduced work content, increased simplicity and speed of bearing grillage frame erection; improved building stability.

9 cl, 5 dwg

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