DD158717A3 - DEVICE FOR SHUT-OFFS OF UNDERGROUND GAS STORAGE - Google Patents

Abstract

The device should be connected to barriers as e.g. are used in the use of unterertaegigen mine spaces as gas storage for sealing, are used. It is the object of the invention to improve the economy and the safety of such combined storage shut-offs and to allow a tight shut-off for higher storage pressures. The device for barriers, which consist essentially of a staehlernen shut-off system, formed of cover plate, expansion chamber and frame, and inserted between a monolithic concrete abutment and a concrete plug and connected via seals with the mountains, is composed of a yielding sealing ring 9, the is tightly connected to the shut-off elements and is secured by a support plate ring 10, Stuetzenlamellenpaketen 13 against damage deformation, as well as arranged in the concrete abutment and grafting joints together. As a result, the displacements occurring at higher pressures are compensated, without endangering the dense staernal barrier and their connections.

Description

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Title of the invention;

Device for closing underground gas storage

Field of application of the invention

The invention relates to a device for shut-off gas underground storage, which should come with the use of underground mine rooms and shafts as gas storage at the closure elements used.

Characteristic of the known technical solu conditions

Gas has been stored for some time in specially constructed underground hoses or in old shafts and mines, where the surrounding mountains provide the required tightness. Difficulties are always the dense shut-off of the storage rooms by masonry and concrete dams or grafting to the surface, especially at the connection points to the mountains and to the guided through the barrier pipes.

Having regard to the fact that concrete is relatively permeable to pressurized gas and alone does not provide sufficient safety in the case of barriers, according to US Pat. No. 2,981,070 or SU-Urheberschein 305,108, barriers have been developed

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Steel-concrete constructions give greater security.

In these barriers, however, there is also the disadvantage that ah the connection points to the mountains sufficient tightness against pressurized gas can not be guaranteed, line reduction in the risk of Umläufigkeit example in the salt mountains should be achieved according to the development according to SU 305 109 in that on the outside Circumference brine is pressed.

However, this can lead to leaching, especially in the border area, as a result of which a leak can not be effectively combatted.

Also known is a barrier submissive gas storage in the salt mountain to DD-WP 85 74-1, consisting of an annular expansion chamber, the inner diameter closing cover plate and a welded on the outer diameter cylindrical frame, which opens with its lower end in a ring slot seal. The tight connection of the self-sealing by welding tight steel barrier to the mountains is achieved by pressing appropriate Dichtungsniaterialien and / or application of fluid pressure corresponding sealing media.

The Uachteil this barrier is to allow no major Relativverschiebungen the steel barrier, such as the cover plate to the connection element expansion chamber or frame "At higher gas storage pressures (about 5 MPa) or larger, shut off shaft diameters resulting from acting on the cover plate gas or hydraulic Verspanndruckes a displacement of the supporting concrete plug, which may be several centimeters in real geometric conditions and mountain mechanical properties, which endangers the connection of the cover plate and thus the tightness of the barrier.

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Object of the invention

It is therefore the object of the invention to improve the economy and safety of such combined gas storage shut-offs by suitable means so that a tight shut-off at / avoid the described disadvantages is possible even at higher storage pressures.

presentation; the invention of the invention

The invention is based on the object. Device for isolating underground gas storage to create, which occur under gas or hydraulic stress load for realization of higher gas storage pressures deformations by Helatiwerschiebung between the individual elements of the barrier without affecting the tightness - as occurs in damage to the steel shut-off and / or their compounds - record allowed.

According to the invention, this is achieved by compensating for the movements between the individual elements of the barrier which are to be expected by a high storage gas pressure by avoiding destruction by installing a special displacement sensor in a known combined shut-off system.

This is done in such a way that a known bell-shaped barrier, consisting of annular expansion chamber, cover plate and frame, is installed, in deviation from the usual direct welding, the connection between the expansion chamber and cover plate by a tightly connected to both elements, even dense, corrugated , steel gasket is made. This yielding sealing ring is secured against adverse deformations by support lamellae packs arranged in the bulges and is supported on an articulated support plate ring which is mounted on the rock and locked on the cover plate and which is formed from individual segments.

When dispensing with the annular expansion chamber, the displacement sensor can be arranged directly between cover plate and frame ·

In the arrangement of a concrete body on the pressure side of the cover plate, as it is used for constructions hydraulic Entspannüng or is useful in the creation of the abutment for the expansion chamber, according to a further feature of the invention, a division of this concrete body in an inner movable part and a outer relatively immovable part, wherein the separating cylindrical sliding joint with a lubricant, eg Bitumen, may be filled along the outer contour of the cover plate or according to the existing, compared to the excavation diameter smaller shaft diameter or cross-sectional area is performed. Due to the separation of the concrete abutment and the resulting possibility of movement of the inner concrete body on the sliding joint an excessive load on the expansion chamber or destruction of the previously monolithically produced concrete body with adverse consequences for the individual shut-off is avoided at high storage or hydraulic Verspannungsdrückeη.

The movement of the inner concrete body is transmitted through the cover plate on the supporting concrete plug and after pressing the teeth of the plug to the mountains, which may correspond to a displacement of a few centimeters, limited by this. The sealing ring allows the case taking place movement of the cover plate without destroying the individual elements of the steel barrier and their tight connections, the used Stützlamellenpakie prevent adverse deformation of the sealing ring and the bearing support plate ring, the movement in a space free from concrete with compressible Material without hindrance can follow, together with the sealing ring absorbs the load.

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The deformable designed in a known manner pipelines are arranged in the perpendicular to the axis of the barrier arrangement also arranged in compressible materials in each free of concrete area movable.

embodiment

The invention will be explained in more detail with reference to an embodiment.

The accompanying drawing shows a side view in section with arrangement of the device in a known steel barrier, consisting of cover plate, expansion chamber and frame.

The device for closing underground gas storage is installed in a steel barrier used in an existing shaft 1 or a line. Between the cover plate 8 and the expansion chamber 7 is the displacement sensor, which is made of the deformable, tightly connected to the elements 7 »8 sealing ring 9» formed from individual segments support plate ring 10 which is supported in the bearings 12 and detents 11 per segment and composed of the support plate packs 13, arranged.

On the pressure side of this barrier, the concrete abutment to be introduced was separated by the example realized with bitumen slip 5 in an inner, movable concrete body 3 and an outer, relatively immovable concrete body 4 and is shut off by the superior seal at the bottom 16 against the pressurized gas. The sliding joint 5 prevents at high pressures overloading and stronger deformation of the expansion chamber 7 with adverse consequences for their connection to the frame 6 and for their tightness and sealing function.

This division also excludes destruction of the concrete abutment due to overloading in the area of

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now provided slip joint 5 would occur from.

The over the barrier e.g. into a shaft 1 bearing concrete plug 2 is loaded by the gas or the hydraulic clamping pressure on the movable concrete body 3 and the cover plate 8 or, in case of leakage of the bottom superior seal 16, by the under the cover plate 8 and the sealing ring 9 pending gas pressure , In particular, higher storage gas pressures, under the assumption of real, geometric conditions and rock properties, produce displacements of the order of magnitude of several centimeters, which would destroy an unyielding, direct connection of the cover plate 8 to the sealing chamber 7.

The device that allows such Relatiwerschiebungen, is composed of a total of the sealing ring 9 clem of individual locked or mounted segments composite support plate ring 10 with locking 11 on the cover plate 8 and bearing 12 on the mountains, the support plate packets 13, the unacceptable deformation of the sealing ring ~ 9 prevent the separated by the slip joint 5 inner concrete body 3 and outer concrete body 4 and the sliding joint 5 a on Betonpfropfen 2, which is located up to the first toothing with the mountains, and with compressible material for pipes 18, 19 and support plate ring 10 in perpendicular to Absperrungsachse lying, concrete-free spaces 14 together.

Upon shifts of the cover plate 8 and the supporting concrete plug 2 in the direction of the resultant of the gas pressure or fluid pressure on the cover 8, the held in detents individual segments of the support plate ring 10 rotate about the bearing 12. At the same time the deformable sealing ring 9 follows the support plate ring 10, wherein the sealing ring 9 has to absorb the radial displacement between its connection points perpendicular to and in the plane of the cover plate 8.

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In addition, if necessary, the memory or hydraulic Yerspanndruck relies on it. The elements supporting plate ring 10 and supporting lamellae packets 13, the latter are e.g. subdivided according to the segments of the support plate ring 10, have the task ,, the stress from the surface pressure on the deformable sealing ring 9 so largely degrade that with a suitable definition of the geometric and deformation properties of the deformable sealing ring 9 a secure recording of the "shifts is possible" order the support plate ring 10 and the lines 18, 19 required for pressurizing or venting or injection to give the movement necessary in the displacement are kept by inserting compressible materials transverse to the axis of the barrier areas 14- of concrete and the tubes 18, 19 in In order to ensure an unimpeded mobility of the concrete plug 2, separate concreting of the area and the placing of the sliding joint 5> a reaching to the first toothing of the concrete plug 2 with the mountain serves as input and output takes place via the line 17.

In the possible known variants of the barrier, the displacement sensor "with the elements 9» 10, 11, 12, 13 in a corresponding manner, for example between cover 8 and frame 6, are used, wherein the sliding joints 5 »5a in the outer contour of the existing Cross section 1 are arranged.

The use of such barriers in routes is analogous to that in shafts and was therefore not explained again; the representation rotated by 90 ° corresponds to these conditions.

Claims (4)

- * - 2 I Ö SL II invention claims 1. Device for barriers underground gas storage, consisting essentially of a steel, combined shut-off system formed from cover plate, expansion chamber and frame or cover plate and frame and inserted between a monolithic concrete abutment and a load-bearing concrete plug and tightly connected via sealing material with the mountains are characterized in that a with the cover plate (8), and the expansion chamber (7) or cover plate (8) and frame (6) tightly connected, yielding Verschiebungsaufnehmer consisting of a deformable sealing ring (9) and one on the sealing ring (9) adjacent, in the mountains in bearings (12) and on the cover plate (8) in detents (11) movably defined, formed from segments support plate ring (10) is arranged. 2. Device according to item 1, characterized in that between the support plate ring (10) and the sealing ring (9) adapted to the bulges, shape-stabilizing Stützlamellenpakete (13) are arranged. Device according to item 1 and 2, characterized in that a cylindrical, in the diameter of the outer contour of the cover plate (8) or the existing, to be closed off cross-section (1) corresponding, e.g. Sliding joint (5) realized with bitumen is arranged in the area of the expected high stresses between an inner concrete body (3) and an outer concrete body (4) when subdividing the concrete abutment. 4. Device according to items 1 to 3 »characterized in that on the supporting concrete plug (2), up to its first toothing with the mountains reaching, the contour of the sliding joint (5) corresponding, e.g. Sliding joint (5a) realized with bitumen is arranged between the concrete plug (2) and the mountain or outer concrete layer (15). Device according to items 1 to 4, characterized in that for the movement of the support plate ring (10) and the pipes (18; 19) lying transversely to the axis of the barrier, concrete-free. Spaces (14) with compressible material, e.g. Foam bodies are arranged. 6. Device according to item 1 to 5, characterized in that the elements sealing ring (9), support plate ring (10), detents (11), bearings (12), support plate packs (13), sliding joints (5; 5a) and concrete-free spaces ( 14) in the individual variants of the combined barrier are to be arranged accordingly « For this 1 page drawing