Pressure vessel

Abstract

It concerns the invention of a pressure vessel (VP) which can be assembled from individual parts, and basically comprises: a plurality of wall modules (MP), at least one connection module (MC) for pipes or sensors, and closing modules (MF) that can be chosen from: have equal configuration and have different configurations. All of the modules have bores (105) distributed radially on their flat surfaces (101) and these bores (105) are distributed between a hollow drill (1051) with a seat (1151) and a torque screw bored (1052) (106) inserted therein attach a module to another adjacent module, with a sealing ring (104) therebetween.

Claims

1. A pressure vessel characterized in that it consists of modules, which are obtained by means of cutting of plates with internal diameter, external diameter and heights depending on the individual characteristics of a project, the modules comprising the following types: a plurality of wall modules, where each has: on both flat surfaces near the inner diameter limit, a recess that is adapted to house a sealing ring so as to promote an energized seal between two modules which are attached to each other; a plurality of bores distributed over one of the flat surfaces of each wall module in a circular manner in modalities which are selected from the group consisting of: at least two diameters to three diameters for pressure vessels which work at lower pressure and a plurality of diameters for larger wall thicknesses in pressure vessels working at higher pressures, wherein; for each diameter, these bores are arranged in sequence as follows: a hollow drill with a seat followed by a screw-threaded drill where; by the interior of a hollow drill, a torque screw is inserted and threaded into the torque screw boring of the adjacent module until its head touches the seat and joins the two modules; at least one connecting module, with the same characteristics of bores and sealing ring of the wall modules, with a height greater than the latter, which presents along its outer wall apertures, through which are secured with a sealing device and an occasional occlusion device, hollow penetrators for connection of pipes as well as for connection of sensors; and closure modules chosen to be either of equal or of different configuration and subdivided into: a top closure module and a bottom closure module, where: the top closure module comprises: a machined top ring having the same characteristics as the above mentioned modules in which, on its lower circular surface, there are only screw-threaded bores with positioning compatible with the hollow drilled holes of the wall module to which it is to be connected; in an inner wall of the top ring is machined a mandible recess within which a mandible comprising a plurality of jaw segments resides, and a plurality of threaded holes traverse the outer wall of the top ring in the region of the mandible recess for insertion of dual-function screws serving to fix and drive each segment of the mandible; a top flange which has on its outer wall engagement grooves in which the jaws of the top ring are locked; and at least three penetrators adapted for connection of pipes as well as for connection of sensors identical to those of the connection module; and the bottom closure module comprises a disk having a concave configuration or a convex configuration, in which a pattern of hollow bores and corresponding seats structurally follows an outer flat ring where the hollow bores and seats are compatible with the wall module to which the bottom closure module is to be connected, where the bottom closure module has a surface having either a concave configuration or a convex configuration facing the interior of the vessel, where near the periphery of these configurations are inlet or outlet holes with occluding plugs for fitting fittings and, optionally, where feet are attached in the case of a stand-up apparatus.

2. The pressure vessel according to claim 1, characterized in that the torque screws are chosen to have twice the maximum torque capacity required in any type of pressure vessel design.

3. The pressure vessel according to claim 1, characterized in that at least one closure module comprises: an external screw, with its central part cast, which serves to drive the jaws against the engagement grooves and a return screw inserted through the interior of the external screw, which return screw serves to secure the mandible within the mandible recess in the inner wall of the top ring.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a side view of a possible embodiment of a pressure vessel according to the present invention.

(2) FIG. 2 shows a longitudinal cross-sectional side view of the possible embodiment of FIG. 1.

(3) FIG. 3 shows an embodiment of a wall module with hole distribution in two diameters.

(4) FIG. 4 shows an embodiment of a wall module with hole distribution in three diameters.

(5) FIG. 5 shows an embodiment of a connection module for the pressure vessel according to the present invention.

(6) FIG. 6 shows a diametrical cross-sectional view of the connection module of FIG. 5.

(7) FIG. 7 shows a perspective view of a possible embodiment for the top closure module for the pressure vessel according to the present invention.

(8) FIG. 8 shows a diametrical cross-sectional view of the top closure module of FIG. 7 with the top flange separate from the top ring and the latter attached to a wall module.

(9) FIG. 9 shows a diametrical cross-sectional view of the top closure module of FIG. 7 with the top flange locked to the top ring.

(10) FIG. 10 shows a perspective view of a possible embodiment for the bottom closure module for the pressure vessel according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(11) The present invention relates to a pressure vessel for maintaining gases or liquids at a pressure substantially different from the ambient pressure. More particularly, high-pressure, segmented type pressure vessels, which may be internal or external, and which can be assembled from individual parts, the characteristics of which permit, once joined, to contemplate various design configurations.

(12) As is known in the art, the wall of the vessel as it will be called the wall of the formed cylinder, increases in size according to the diameter of the vessel itself and the pressure to which it will be subjected. This is because the normal tension in the wall of the vessel is inversely proportional to the thickness of the walls. This is the greatest limitation for the construction of conventional pressure vessels, since the critical tensions reside on the wall of the vessel: radial, circumferential, axial, and the forms of construction of these walls, the thicker and larger the internal diameter, are barriers to the machines that manufacture them.

(13) The effect caused by the high circumferential tension on coarse wall cylinders is known as the Lame Effect (Gabriel Lam). The theoretical treatment of thin-walled cylinders assumes that the circumferential tension is constant across the whole wall thickness of the cylinder. It is also considered that there is no radial stress gradient caused by pressure along the wall.

(14) However, none of these assumptions can be used in the case of thick-walled cylinders. The variation of the circumferential stress and the radial stress are calculated by the Lam equations.

(15) The pressure vessel (VP) (FIGS. 1 and 2) object of the invention is constituted by cylinders, which will be called hereinafter and generally by modules, which are obtained by means of cutting of plates with internal diameter, diameter external and heights that are dependent on the individual characteristics of each project and comprise the following types: a plurality of wall modules (MP), (FIGS. 3 and 4) where each has: on both flat surfaces 101 near the inner diameter limit 102, a recess 103 is adapted to house a sealing ring 104 so as to promote an energized seal between two modules which are attached; a plurality of bores (105) distributed over one of the flat surfaces (101) of each wall module (MP) in a circular manner in modalities which may be chosen from: at least two diameters to three diameters for pressure vessels (VP) which work at lower pressure and a plurality of diameters for larger wall thicknesses in pressure vessels (VP) working at higher pressures, wherein; for each diameter, these bores (15) are arranged in sequence as follows: a hollow drill (1051) with a seat (1151) (FIG. 10) followed by a screw-threaded drill (1052) where; by the interior of a hollow drill (1051), a torque screw (106) is inserted and threaded into the torque screw boring (1052) of the adjacent module until its head (1061) touches the seat (1151) and joins the two modules; at least one connecting module (MC) (FIGS. 5 and 6), with the same characteristics of bores and sealing ring (104) of the wall module (MP), with a height greater than the latter, presents along of its outer wall apertures (201), through which are secured with sealing device (202) and occasional occlusion device (203), hollow penetrators (204) for connection of pipes as well as for connection of sensors; closure modules (MF) that may be chosen between being of equal or different configuration are subdivided into: a top closure module 300 and a bottom module 400 where: the top closure module (300) (FIGS. 7, 8 and 9) comprises: a machined top ring (301) having the same characteristics as the abovementioned modules in which, on its lower circular surface (302), there are only screw-threaded bores (1052) with positioning compatible with the hollow drilled holes (1051) (301) of the wall module (MP) to which it is to be connected in the inner wall (303) of the top ring (301) is machined a recess (304) within which a plurality of jaw segments (305) a plurality of threaded holes 306 traverse the outer wall 307 of the top ring 301 in the region of the recess 304 for insertion of dual-function screws 308 serving to fix and drive each segment of the mandible (305); is a top flange 309 which has on its outer wall 310 engagement grooves 311 in which the jaws 305 of the top ring 301 on its upper surface 312 are locked, at least three penetrators (3122) are adapted for connection of pipes as well as for connection of sensors identical to those of the connection module (MC); the bottom closure module 400 (FIG. 10) comprises a disk 401 which may have various configurations, such as a concave configuration, in which structurally follows an outer flat ring 402 where there are hollow bores 1051 with (1151) of the wall module (MP) to which it is to be connected follows a surface that can be chosen between having a concave configuration for the interior of the vessel and convex, depending on the design, and near the periphery of these configurations are inlet or outlet holes (403) with occluding plugs (404) for fitting fittings and, in addition, feet (405) can be attached in case the equipment operates in foot.

(16) The torque screws (106) are chosen to have twice the maximum torque capacity required in any type of pressure vessel (VP) design.

(17) The dual function screws 305 (FIG. 9) comprise: an outer screw 3051, with its central portion hollow, which serves to drive the jaw 305 against the engagement grooves 309 of the flange (305) and a return screw (3052) inserted through the interior of the outer screw (3051) and serves to secure the mandible (305) within the recess (304) in the inner wall (303) of the top ring (301).

(18) The torque screws (106) are short, intended to join modules two to two, facilitate assembly and increase the bond strength between the modules. Due to the use of a larger number of bolts, the diameter of these bolts decreases and thus the torque in each bolt is decreased and increases the reliability of the bolt because there is a large number of bolts that add up and give the necessary force for the union between the bolts modules.

(19) When the torque is applied to the torque screws (106), there is practically no possibility of the modules moving away since the compressive force caused by the union between the latter is greater than the radial force produced by the effect of the modules of closure (MF).

(20) The very thickness of the modules distributes the circumferential tension and the radial tension.

(21) The design of the pressure vessel (PV) object of the present invention has as advantages the manufacture of its components by conventional means and within reach of the domestic industry, much lower cost for the production and much easier transport logistics for the place of installation.

(22) Although the present invention has been described in its preferred embodiment, the main concepts guiding the present invention which are a pressure vessel for maintaining gases or liquids at a pressure substantially different from the ambient pressure of the large segmented type diameter and high pressure, which can be internal or external and can be assembled from individual parts, whose characteristics allow, once united, to contemplate various design configurations, preserved for its innovative character, where those usually versed in the art they may envisage and practice variations, modifications, alterations, adaptations and equivalent equivalents compatible with the work medium in question, without, however, departing from the scope of the spirit and scope of the invention, which are represented by the following claims.