RU2460865C1 - Quakeproof reservoir - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: quakeproof reservoir is arranged from glass plastic. It comprises a horizontal cylindrical body, which includes a shell, its undetachable bottoms, an access door, an instrumentation chamber manhole, nozzles for drain, fill, intake and overflow pipes and an air nozzle. The body is equipped with a system to suppress its oscillations. The system comprises circular, longitudinal and transverse dampers installed inside and outside the body. Side stepped and central dampers are formed with external circular ribs coupled with a shell. Longitudinal dampers are formed by external shaped stringers. Additional dampers are formed by location beds with yokes that tighten them and fix the body position. Transverse dampers are made in the form of baffle plates installed inside the shell in a discrete manner in a staggered order above and below the longitudinal axis of the shell. The body has a capsule-like coating from a resilient elastic material with a deformability extent of at least 300%, for instance, a polyurethane composition, fixed with a body material with a cohesion-adhesion joint. Such reservoir is suitable for ground installation or for installation into soil with a border.

EFFECT: invention makes it possible to increase earthquake stability, operational reliability and repairability of reservoir design.

23 cl, 6 dwg

Description

Technical field

The invention relates to the field of construction, relates to a tank with a horizontal cylindrical body, designed to store liquids, including drinking water, and can be used in the development of tanks for seismically active areas.

State of the art

A well-known reservoir for storing liquids, including drinking water, made of composite materials, suitable for both ground installation and for installation "in the ground" with an embankment (RU 2331739 C2, IPC EV 03/11, publ. 08/08/2008, Bull. No. 23).

The known reservoir is not suitable for use in seismically active areas due to the instability of its vertical structure and the lack of damping means of the hull during seismic action.

Known earthquake-resistant tank mounted on a support containing a horizontal cylindrical body, consisting of a shell, integral with her convex bottoms, hatches and drainage devices; the casing is equipped with a system of dampers of its vibrations from exposure to the contents during seismic loads, including transverse dampers located inside it located discretely relative to each other in its casing and attached to the casing along its contour (SU 1209807, IPC E04N 7/16, published 07.02 .86, Bull. No. 5).

In the known reservoir, transverse partitions made in the form of a cross-section of the shell, fastened with it along the entire contour, with the exception of the holes in the upper and lower parts, designed to pass air and liquid, respectively, were used as shock absorbers of body vibrations from the shock wave. Partitions divide the tank into compartments.

During tremors, the shock wave of a liquid is quenched against a body in a known reservoir separately in each compartment; the wave does not have time to waste its strength within one compartment and, in the form of arbitrarily repeating rollbacks and rollbacks, works to destroy the hull, especially when meeting mutually reinforcing rollbacks in one compartment and rollback in another.

The known reservoir is made of metal and susceptible to corrosion, has numerous welded joints, which are stress concentrators that form fracture zones under seismic loading. It is not convenient in operation and during repair, since access to its compartments is not provided.

Known metal tank mounted on a support containing a horizontal cylindrical body, consisting of a shell and hemispherical bottoms, transverse vibration dampers of the body in the form of flexible perforated transverse partitions placed in the shell and fastened with it around its entire contour, hatches and filling devices (US 2724597 , national class 280/5, publ. 11/22/1955).

The known tank is designed for transporting liquid and is designed to counter longitudinal hydraulic shock during sudden braking or accelerating the movement of the vehicle. Each flexible transverse partition of its body has a thickness smaller and a diameter larger than the corresponding thickness and diameter of the shell and is bonded to the shell with the formation of a bulge directed towards one (for all partitions) bottom, from where, according to the authors, a water hammer should appear. This design is unsuitable for the perception of seismic impact with its unpredictability of the direction of water hammer. As in the previous source, partitions divide this reservoir into compartments, which will inevitably lead to the above consequences with longitudinal hydraulic shock. The tank is not accessible for repair without dismantling.

There are other designs of metal tanks with horizontal cylindrical bodies, equipped with vibration dampers, described in the following sources in the class IPC B65D 88/12: SU 629131, publ. 10/25/78. Bull. No. 39; SU 929500, publ. 05/23/82. Bull. No. 19; SU 981121, publ. 12/15/82. Bull. No. 46; SU 1211168, publ. 02/15/86. Bull. No. 6; SU 1413037, publ. 07/30/88. Bull. No. 28; SU 1451075, publ. 01/15/89. Bull. No. 2; SU 1599272, publ. 10/15/90. Bull. No. 38.

All of these well-known tanks are designed to transport liquids. They are designed for water shocks of predictable strength and direction and are not suitable for use in seismically active areas.

The reservoir according to the copyright certificate SU 1209807 is the closest in technical essence to the claimed one and is selected as the closest analogue (prototype).

Disclosure of invention

The technical problem that was posed during the creation of the invention was to develop an earthquake-resistant reservoir for liquids, including drinking water, light in weight, not subject to corrosion, uncomplicated in operation, withstanding seismic effects of up to nine points.

The technical result that can be obtained by using the invention is to increase the earthquake resistance, operational reliability and maintainability of the reservoir design.

To solve the problem and achieve the stated result in an earthquake-resistant tank containing a horizontal cylindrical body located on the support, consisting of a shell, integral with its convex bottoms, a system of vibration dampers of the housing from exposure to the contents during seismic loads, including transverse dampers located inside it, located in the shell discretely relative to each other and fastened with it, hatches and loading and unloading devices, according to the invention, the above system the oscillation dampers are equipped with annular, main and additional, and longitudinal dampers located outside the housing, while the main annular and longitudinal dampers are made as stiffeners, are located on the shell and aligned with it, and additional annular dampers are formed by a support provided with housing position locks on transverse absorbers placed inside the housing are made in the form of baffle plates located above and / or below the longitudinal axis of the shell, fastened to the latter by means of casing of their sides with profiled stiffening ribs, the body inside and / or outside is provided with a continuous capsule-like coating of an elastic-flexible material with a degree of deformability of at least 300%, bonded to the body material by cohesive-adhesive bond, while the body is made of a layered composite material based on fiber reinforcing material and polymer binder. In particular cases of the invention, the main annular dampers of the system include two lateral dampers, each with one-sided steps descending to the inner diameter, placed by their descending steps towards each other at opposite ends of the shell adjacent to its ends, and one central damper covering the shell in the middle; as the mentioned annular dampers, ring frames are used which are integral with the shell of the housing; longitudinal system dampers include at least eight dampers located on the top and / or bottom of the shell on both sides of the central annular absorber; longitudinal system dampers include eight dampers located on top of the shell, four on each side of the central annular absorber, with two out of every four placed between the side and central annular dampers, and the rest on the side annular absorber; longitudinal system dampers include sixteen dampers placed eight in the upper and lower sides of the shell; profiled stringers were used as longitudinal system absorbers, each of which is molded to a shell; as additional annular dampers, lodgements were used as supports for the housing, with clamps as fixators for the position of the housing on them; the casing is placed on three lodges with support on them by its central and lateral annular dampers; the housing is placed on four lodges with support on them with its lateral ring absorbers and a shell; the baffle plates are staggered in the shell; as the fibrous reinforcing material of the body, polymer, glass, basalt or carbon fibers, threads, plaits, strands, ribbons, fabrics, canvases or mats are used individually or in combination with each other; as the polymeric binder material of the body, a binder based on polyester, epoxy, vinyl ester or polyurethane resin, or a combination thereof, is used; the shell of the body is made of wound layers of epoxyphenol fiberglass, and the bottoms are made of molded layers of polyester fiberglass; ring frames and shaped stringers of vibration dampers are made of body material or other composite material; each bottom of the body is fastened with a shell through a layer of resiliently flexible material with a bolted connection, molded, sealed and sealed; the thickness of the capsule-like coating of resilient material is 10-20% of the shell thickness; as an elastic-flexible coating material, a polyurethane composition is used; body hatches include a manhole and an instrument hatch; drainage devices include nozzles with flanges for the filling, drain, overflow and intake pipes and an air pipe, while the pipe for the overflow pipe is fixed to the shell, the overflow pipe is mounted on the baffle plate, the pipes for the filling and intake pipe are on the bottoms of the body, the pipe for the drain pipe - on the side of the bottom, and the air pipe - on the side of the top; fenders, hatches and nozzles with flanges, each separately, are supported by wedge-shaped stiffeners, which are perpendicular to them and molded; the inside of the case is equipped with a ladder mounted on the shell and the manhole; the tank is suitable for surface installation or for installation "in the ground" with an embankment.

Distinctive features of the claimed earthquake-resistant reservoir are the following:

a) the signs that ensure the receipt of a technical result in all cases to which the requested amount of legal protection applies:

- supplying a system of vibration dampers of the housing with annular, primary and secondary, and longitudinal dampers located outside the housing,

- the implementation of the main annular and longitudinal absorbers in the form of stiffeners,

- their location on the shell and combination with it,

- the formation of additional annular dampers support and position locks of the housing on it,

- the implementation of the transverse absorbers placed inside the casing in the form of fender plates,

- the location of the baffle plates above and / or below the longitudinal axis of the shell,

- fastening the said plates with a shell by fixing their sides with profiled stiffeners,

- supplying the housing inside and / or outside with a continuous capsule-like coating of resiliently flexible material with a degree of deformability of at least 300%,

- bonding the coating material with the material of the housing by a cohesive-adhesive bond,

- the execution of the body of a layered composite material based on a fibrous reinforcing material and a polymer binder;

b) signs characterizing the invention in special cases:

- the composition of the main annular dampers, including two side dampers and one central,

- the implementation of each side damper with one-sided, descending to the inner diameter of the stepping,

- placement of side dampers in descending steps towards each other at opposite ends of the shell adjacent to its ends,

- placement of the central damper on the shell with the shell in the middle;

- the use of ring frames that make up with the shell of the housing as a whole, as the main ring absorbers,

- the composition of the longitudinal dampers, including at least eight dampers,

- placement of the said at least eight absorbers on the top and / or bottom of the shell on both sides of the Central annular damper,

- the composition of longitudinal absorbers, including eight absorbers, located on top of the shell four on each side of the central annular absorber so that two out of every four are placed on the shell between the side and central annular absorbers, and the rest on the side annular absorber,

- the composition of the longitudinal dampers, including sixteen dampers, placed eight on the top and bottom of the shell,

- the use as longitudinal dampers of profiled stringers, each of which is molded to the shell,

- use as additional ring damper lodgements, as supports for the housing, with clamps as retainers position of the housing on them,

- housing on three lodges with support on them with its central and lateral ring absorbers,

- placement of the housing on four lodges with support on them with its lateral ring absorbers and a shell,

- the location of the baffle plates in the shell in a checkerboard pattern,

- use as a fibrous reinforcing material of the housing individually or in combination with each other of polymer, glass, basalt or coal fibers, threads, plaits, strands, ribbons, fabrics, canvases or mats,

- the use of a binder based on polyester, epoxy, vinyl ester or polyurethane resin, or a combination thereof as a polymer binder material of the body,

- performance shell shell of wound layers of epoxyphenol fiberglass, and the bottoms of the molded layers of polyester fiberglass,

- the implementation of the ring frames and shaped stringers from the material of the body or other composite material,

- fastening of each bottom of the body with a shell through a layer of resiliently flexible material with a bolt connection followed by shaping, sealing and sealing,

- the thickness of the coating of resiliently flexible material, comprising 10-20% of the shell thickness,

- use as a resiliently flexible coating material of the polyurethane composition,

- the composition of the hatches of the body, including the hatch-manhole and instrument hatch camera,

- the composition of the drainage devices, including nozzles with flanges for bulk, drain, overflow and intake pipe and air pipe,

- fixing the pipe under the overflow pipe on the side of the pipe, the overflow pipe on the baffle plate, pipes under the filling and intake pipes on the bottoms of the body, pipe under the drain pipe on the side on the bottom, and the air pipe on the side on the top,

- reinforcement of baffle plates, hatches and nozzles with flanges, each individually, with wedge-shaped stiffeners that are perpendicular to them and are formed,

- supply of the case from the inside with a ladder mounted on the shell and the manhole,

- suitability of the tank for surface installation or for installation "in the ground" with an embankment.

These distinctive features, each individually and all together, are aimed at solving the problem and are significant.

Using the combination of these features in the prior art, analogues and prototype is not found.

A single set of new essential features with common known allows you to solve the problem.

The claimed tank has increased seismic resistance and operational reliability due to other than in the prototype, design, which includes:

- the presence of dampers (in the system of dampers of oscillations of the housing), not only placed inside the housing, as in the prototype, but also placed outside it,

- structural design and location of the absorbers located outside the housing,

- another implementation of the absorbers located inside the housing,

- the use of additional absorbers,

- the presence of a continuous coating from the inside and / or outside of the housing of a material that provides damping of residual vibrations of the housing.

The listed design features of the claimed tank are realized through the use of a lightweight, durable, corrosion-free composite material based on fibrous reinforcing material and a polymer binder. The choice of material is due to the fact that the claimed tank with a horizontal cylindrical body is intended for use in seismically active areas with a high degree of probability of earthquakes up to nine points in magnitude. Destructive loads in such phenomena can include almost all types of mechanical loads, but exclude prior knowledge of their magnitude and direction of application. High-modulus and high-strength layered composite materials, due to their anisotropy, have higher abilities to counter multidirectional destructive loads compared to other structural materials (for example, metals, concrete). For the implementation of the invention, fiberglass, carbon fiber, basalt plastic and other composite materials are suitable. In a preferred embodiment, the reservoir is made of fiberglass. The shell of the body is formed by wound, and the bottoms are formed by molded layers.

To maintain integrity during very strong tremors, the tank body is equipped with a system of transverse, annular and longitudinal dampers from the action of the maximum possible longitudinal, transverse, annular and combined hydraulic shock loads during earthquakes. The listed loads should also be understood as loads with a deviation from ideally directed loads. Mentioned absorbers are placed not only inside the housing, as in the prototype, but also outside it. The placement of dampers outside the housing is dictated by the desire to avoid reducing the useful volume of the tank and cluttering the interior of the housing, which would complicate operation and repair.

Ring dampers include primary (two side and one central) and additional dampers.

The lateral ring dampers are made stepwise with a gradual increase in the width and height of the steps as they grow, which eliminates sharp differences in the intensities of the oscillations of the bottoms and shell of the body. They are located on the shell with their flat side (without steps) flush with the end of the shell. Step dampers form a single unit with the shell and are formed by a set of frames.

The central annular absorber is formed by a frame molded to the shell. It reduces the amplitude of oscillations of the middle part of the body.

Additional annular dampers, consisting of lodgements with clamps, fixing the housing cover to its position on the lodgements, together with the side and central annular dampers, ensure the safety of the hull, and therefore the reservoir, under seismic ring loads.

Longitudinal dampers provide resistance to water hammer directed along the tank. They are located on the top and bottom, or only on the top, or only on the bottom of the shell of the housing, mainly on both sides of the central annular damper at different levels. As longitudinal dampers, stringers shaped for shell contour are used, made of housing material or of another composite material suitable for this purpose.

The choice of the design of the transverse dampers located inside the body in the form of baffle plates is dictated by the need to damp the seismic vibrations by crushing the shock wave over the entire internal volume of the body immediately, which was achieved as a result of breaking the wave by plates located discretely and at different heights relative to each other. The use of baffle plates turned out to be convenient for operation and repair, providing access to anywhere in the hull. The plates can be made of shell material or other composite material, providing their strength and rigidity. They are fixed to the shell by their sides, reciprocal of the shell contour in the places of their attachment to it, by means of one- or two-sided fixation by profiled stiffeners, mainly wedge-shaped. The placement of the plates in a checkerboard pattern is optimal, but does not exclude any other arrangement.

The choice of coating material is associated with the need to eliminate all residual vibrations of the housing, primarily its bottoms, and also to prevent cracking. A special resilient polyurethane composition with a deformability of at least 300% most of all meets these requirements. The capsule-like coating of the body from the inside, as well as, if necessary, from the outside, is continuous with all vibration dampers and attachment points. To ensure mutual adhesion of the coating material with the material of the shell, a coating with a thickness of 10-20% of the shell thickness is applied to the previously prepared rough surface of the body with the formation of a cohesive-adhesive bond between the materials. A layer of resilient material is also laid between the bottoms and the shell at the junction.

The claimed tank is equipped with nozzles with flanges for bulk, drain, intake and overflow pipes, an air nozzle, a manhole and an instrument manhole, as well as a ladder. It is suitable for surface installation and installation "in the ground" with an embankment.

The invention is illustrated by a description of a specific, but not limiting, example of implementation and the accompanying drawings.

Figure 1 shows the claimed tank, a ground-based installation option, a general view with partial cutouts, figure 2 shows a lateral annular vibration damper of the housing, a cross section, figure 3 shows a baffle plate, front view, figure 4 shows the mount in the baffle plate to the shell, in Fig.5 - the attachment of the nozzle with a flange to the bottom, Fig.6 - the attachment of the hatch to the shell.

An earthquake-resistant tank for storing liquids, including drinking water, suitable for surface installation, contains a horizontal cylindrical body 1 with a system of dampers of its vibrations, consisting of a shell 2, one-piece convex bottoms 3 and 4, hatches 5 and 6, and five nozzles 7 , 8, 9, 10, 11 with flanges (figure 1).

The housing 1 is made of fiberglass, and the shell 2 is made of wound layers of epoxyphenolic fiberglass, and the bottoms 3, 4 of the molded layers of vinyl ester fiberglass.

The system of vibration dampers of the housing 1 includes the main annular dampers located outside on its shell 2: side dampers 12, central 13, longitudinal dampers 14 and transverse dampers 15 located inside it in its rim 2, as well as additional ring dampers 16.

The housing 1 from the inside, and, if necessary, from the outside, has a continuous capsule-like coating 17 made of resilient material.

Each lateral ring damper 12 (Fig. 2) is made with one flat lateral face 18 and the other 19 stepwise with steps descending to its inner diameter 20. The damper 12 is located at opposite ends of the shell 2 with their flat faces 18 flush with the ends 21 of the shell 2. They one-sided stepping is smoothly combined with the shell 2. They are formed by ring frames, which make up one shell with the shell 2.

The Central annular damper 13 (Fig. 1) is located in the middle of the shell 2 and is formed by an annular frame, combined with the shell 2.

Longitudinal dampers 14 (Fig. 1) are profiled stringers, molded to the shell 2. They are placed on top of the shell 2 on both sides and are located four on each side of the central evaporator 13: two (one not shown) - between the side 12 and central 13 dampers and two (one not shown) on the side dampener 12.

Transverse dampers 15 (Figs. 1, 3, 4) are made in the form of baffle plates with lateral sides corresponding in shape to the contour of the shell 2 in places of their intended installation in it. They are located in the shell 2 relative to each other discretely, in a checkerboard pattern above and below the longitudinal axis 0 of the shell. The dampers 15 are attached to the shell 2 by fixing their sides with wedge-shaped stiffeners 22.

Additional annular dampers 16 (figure 1) are formed by lodgements 23, in which the housing 1 is mounted with support on them, and clamps 24, tightening the lodgements with the coverage of the housing 1 and fixing the position of the latter.

Coating 17 (Figs. 1, 3) is applied to the housing 1 in the form of a capsule layer: from the inside, along its entire inner surface, including transverse dampers 15 (a capsule-like coating is shown by a dotted line in Fig. 3), from the outside, along the entire outer surface, including the main ring 12, 13 and longitudinal absorbers 14. It is made of a polyurethane composition. Its thickness is 20% of the shell thickness (here, 2.4 mm with a shell thickness of 12 mm). In addition, through a layer of the same or another resilient material, the bottoms 3, 4 are fastened to the shell 2 by a bolt joint, after which they are molded, sealed and sealed.

Hatches 5 and 6 are placed on the shell 2, while the hatch 5 is a manhole, and the hatch 6 is an instrument hatch camera (Fig. 1).

The pipe 7 is mounted on the casing 2 from the bottom and is intended for the drain pipe, the pipe 8 is fixed on the bottom 3 and is designed for the filling pipe, the pipe 9 is fixed on the bottom 4 and is intended for the intake pipe, the pipe 10 for the overflow pipe is fixed on the casing 2, and the overflow the pipe 25 is mounted on the baffle plate of the transverse damper 15. The air pipe 11 is mounted on the casing 2 on top (figure 1).

Hatches 5, 6 and all nozzles with flanges are supported, like the baffle plates, by similar wedge-shaped stiffening ribs 22 located perpendicular to them and molded (Figs. 5, 6).

The housing 1 from the inside is equipped with a ladder 26, mounted on the shell 2 and the manhole 5 (Fig. 1).

The claimed tank is suitable for installation "in the ground" with an embankment. It is available for internal repairs.

During tremors, the shock wave of the liquid contained in the tank about its body 1 will pass with attenuation throughout the body 1, crushing against the baffle plates of the transverse dampers 15, which it encounters on its way. Moreover, the system of lateral 12, central 13 and additional 16 ring absorbers with longitudinal absorbers 14 prevents the local loss of stability of the housing 1 from the occurring shock loads, and the capsule-like coating 17 made of resilient material prevents the appearance of high-frequency vibrations of the housing.

Design features of the proposed reservoir: annular, transverse, and longitudinal vibration dampers of the body, an elastic-like capsule-like coating, an additional body vibration damper formed when the tank is mounted on lodgements with fixing of its body with clamps are a guarantee of preserving the integrity of the tank under seismic action with a force up to nine points.

Industrial applicability

The claimed tank is manufactured in industrial conditions on winding and forming equipment for the production of products from composite materials.

Claims (23)

1. An earthquake-resistant tank containing a horizontal cylindrical housing located on a support, consisting of a shell, convex bottoms inseparable from it, a system of vibration dampers of the housing from exposure to the contents during seismic loads, including transverse dampers located inside it located discretely relative to each other inside the shell and fastened with it, hatches and loading and unloading devices, characterized in that the vibration damper system is equipped with annular, basic with additional and longitudinal dampers, while the main annular and longitudinal dampers are made in the form of stiffeners, are located on the shell and combined with it, and additional annular dampers are formed by a support provided with housing position locks on it, each transverse absorber located inside the housing is made in in the form of a baffle plate located above and / or below the longitudinal axis of the shell fastened to the latter by fixing its sides with profiled stiffeners, the case is inside and / or externally provided with a continuous capsule-like coating of an elastic-flexible material with a degree of deformability of at least 300%, bonded to the body material by a cohesive-adhesive bond, the body being made of a layered composite material based on a fibrous reinforcing material and a polymer binder. 2. The tank according to claim 1, characterized in that the main annular dampers of the system include two lateral dampers, each with a one-sided step that descends to the inner diameter, placed by their descending steps towards each other at opposite ends of the shell adjacent to its ends, and one central damper covering the shell in the middle. 3. The tank according to claim 1 or 2, characterized in that the ring frames are used as the said annular dampers, which are integral with the shell of the housing. 4. The tank according to claim 1, characterized in that the longitudinal damper system includes at least eight damper located on the top and / or bottom of the shell on both sides of the Central annular damper. 5. The tank according to claim 1 or 4, characterized in that the longitudinal absorbers of the system include eight absorbers located on top of the shell, four on each side of the central annular absorber, while two out of every four are located between the side and central annular absorbers, and the rest are on the lateral ring damper. 6. The tank according to claim 1 or 4, characterized in that the longitudinal damper of the system includes sixteen damper placed eight on the top and bottom of the shell. 7. The tank according to claim 1 or 4, characterized in that the profiled stringers are used as longitudinal damper systems, each of which is molded to the rim. 8. The tank according to claim 1, characterized in that as additional annular dampers are used lodgements as supports for the housing with clamps as fixators for the position of the housing on them. 9. The tank according to claim 8, characterized in that the housing is placed on three lodges with support on it by its central and side annular dampers. 10. The tank according to claim 8, characterized in that the housing is placed on four lodges with support on it with its lateral ring dampers and a shell. 11. The tank according to claim 1, characterized in that the baffle plates are located in the shell in a checkerboard pattern. 12. The tank according to claim 1, characterized in that as the fibrous reinforcing material of the body used individually or in combination with each other, polymer, glass, basalt or coal fibers, threads, tows, strands, ribbons, fabrics, canvases or mats. 13. The tank according to claim 1, characterized in that the binder based on polyester, epoxy, vinyl ester or polyurethane resin, or a combination thereof, is used as the polymer binder material of the body. 14. The tank according to claim 1, characterized in that the shell of the body is made of wound layers of epoxyphenolic fiberglass, and the bottoms of the formed layers of polyester fiberglass. 15. The tank according to claim 1, characterized in that the ring frames and shaped stringers of vibration dampers are made of body material or other composite material. 16. The tank according to claim 1, characterized in that each bottom of the body is fastened with a shell through a layer of resilient material by a bolted connection, molded, sealed and sealed. 17. The tank according to claim 1, characterized in that the thickness of the coating of resiliently flexible material is 10-20% of the shell thickness. 18. The tank according to claim 1, characterized in that the polyurethane composition is used as an elastically flexible coating material. 19. The tank according to claim 1, characterized in that the hatchways of the body include a manhole and an instrument hatch chamber. 20. The tank according to claim 1, characterized in that the discharge and filling devices include nozzles with flanges for bulk, drain, overflow, intake pipe and air pipe, while the pipe for the overflow pipe is mounted on the shell, the overflow pipe on the baffle plate, the nozzles for the bulk and intake pipes are on the bottoms of the body, the nozzle for the drain pipe is on the side of the bottom, and the air pipe is on the side of the top. 21. The tank according to claim 1, characterized in that the baffle plates, hatches and nozzles with flanges, each separately, are supported by wedge-shaped stiffeners that are perpendicular to them and are molded. 22. The tank according to claim 1, characterized in that its body is equipped with a ladder inside mounted on the shell and the manhole. 23. The tank according to claim 1, characterized in that it is suitable for surface installation or for installation "in the ground" with an embankment.

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