• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a cover (1) for a rotary joint of a pipeline and to a method for manufacturing the cover (1). The cover is composed of an outer layer (2), an insulating layer (4) and an inner layer (3). The outer layer (2) and internal (3), corrugated metal, are characterized by being provided with a closed common contour (6). The insulating layer (4) is comprised in an interior space (7), delimited by the outer layer (2), the inner layer (3) and the contour (6), being completely isolated from an outer space (8) at the cover (1). A tight cover is provided, with effective and safe insulation. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2713274A1
    申请号:ES201731335
    申请日:2017-11-17
    公开日:2019-05-20
    发明作者:Garcia Antonio Jurado
    申请人:Idr S L；Dizier Cyrille；
    IPC主号:
    专利说明:

    [0001]
    [0002] COVER FOR A ROTARY BOARD OF A DRIVING
    [0003]
    [0004] Sector of the technique
    [0005]
    [0006] The invention relates to a thermal insulation cover for rotary joints of thermal conductions, present in the installations of solar collectors.
    [0007]
    [0008] State of the art
    [0009]
    [0010] As a result of growing environmental concerns, there is currently a strong emphasis on renewable energy sources, such as solar collectors.
    [0011]
    [0012] The solar collectors are devices provided with adjustable collector mirrors that, equipped with a motor system, are able to follow the solar path to capture their luminance radiation and concentrate it in a conduit or absorber tube through which circulates a thermal fluid or a molten salt. The fluids at high temperatures are transported to exchange systems, where the thermal fluid or molten salt gives its heat energy to the water of the exchanger system. An exchanger is a device designed to transfer heat between two media in contact. Normally, the heat energy is transferred to the water, thus generating water vapor. Water vapor pressure drives a turbine. The turbine is connected to an electricity generator that is then incorporated into the electrical network.
    [0013]
    [0014] Each solar collector mirror must rotate to maintain the most favorable reflection angle at each moment. It is about that the solar radiation affects the adjustable mirrors and the mirrors reflect the solar rays towards the absorber tube. The most favorable angle is that which allows a minimum waste of solar radiation. In order to allow longitudinal and rotary movements, the tubes Absorbers are equipped with rotary joints. The rotary joints are located at the ends of said absorber tubes and work at the same temperature as the tubes themselves.
    [0015]
    [0016] Solar installations present some critical aspects in relation to conductions. On the one hand, the concentration of light radiation generates high temperatures in the fluids driven by the absorber tubes. The high temperatures concentrated in the absorber tubes cause longitudinal dilatations. Therefore, it is necessary to provide an insulation that allows proper operation of the rotating joints, so that they can rotate or expand according to possible temperature variations within the installation. On the other hand, rotary joints are considered a very sensitive element in the installation of solar collectors and are subject to frequent maintenance inspections and repairs. Frequent inspections generate the need for the system to be easy to assemble and disassemble.
    [0017]
    [0018] The coating for piping of heat transfer fluid disclosed in patent EP2729726 is known. The coating comprises a metal box, formed by an outer layer and an intermediate layer, filled with insulating material. The box has a cylindrical cavity and can float and rotate around a rotating joint. However, this known coating can present problems related to the safety of the installation, in particular a considerable risk of fire originating in the area of the rotary joints.
    [0019]
    [0020] The object of the present invention is to provide a thermal insulation cover that improves the safety of the installation of solar collectors and has a good performance against the high temperatures to which this type of roofing is subjected.
    [0021]
    [0022] Brief description of the invention
    [0023]
    [0024] The object of the invention is a cover for a rotary joint of a thermal conduction, provided with an outer layer, an insulating layer and an inner layer arranged around an axis. The cover is characterized in that the outer layer and the inner layer are made of corrugated metal and are provided with a closed contour common to the outer layer and the inner layer. In this way, there is an interior space delimited by the outer layer, the inner layer and the contour. The insulating layer is arranged in the interior space, completely isolated from a space outside the cover.
    [0025]
    [0026] Thanks to the fact that the common contour of the outer and inner layer is closed, a hermetic cover and total tightness of the insulating layer is achieved. The material of the insulating layer does not come into contact with the space outside the cover or with the rotating joint. In this way it is avoided that the material of the insulating layer can become impregnated in case of possible leakage of thermal fluid in the conduction. The impregnation of the insulating layer can cause its deterioration and, what is more dangerous, get to generate a fire caused by the high temperatures of the thermal fluid in contact with the insulating layer. The cover according to the invention solves these problems by providing safe and effective isolation.
    [0027]
    [0028] Preferably, the inner and outer layers are made by a low thickness corrugated metal. The fact that the outer and inner layers are a corrugated metal, allows the cover to absorb the expansions of the material, generated by the high temperature of the thermal fluid, without suffering deterioration. At the same time, the use of a low thickness minimizes the transmission of heat from the rotary joint to the outer layer of the cover.
    [0029]
    [0030] Thanks to the technical characteristics previously detailed, the cover according to the invention increases the insulating capacity and decreases the thermal losses with respect to other traditional systems, being between 15% and 40% more efficient according to the material of manufacture chosen for the insulating layer and according to the working temperature.
    [0031]
    [0032] All this, allows the installation costs to be lower, since the protection of the insulation is considerably improved, and in general the protection of the rotary joint which is one of the key pieces of the solar collectors.
    [0033]
    [0034] The invention also relates to the method of manufacturing a cover adapted to the rotating joint to be insulated. The procedure allows to improve the life of the cover.
    [0035]
    [0036] Brief description of the figures
    [0037]
    [0038] The details of the invention can be seen in the accompanying figures, not intending to limit the scope of the invention:
    [0039]
    [0040] - Figure 1 shows a front view of the roof when it is closed and placed in the installation.
    [0041] - Figure 2 shows a perspective of the open cover, which allows to visualize the configuration of the outer layer.
    [0042] - Figure 3 shows a perspective of the open cover, which allows to visualize the configuration of the inner layer.
    [0043]
    [0044] Detailed description of the invention
    [0045]
    [0046] The invention relates to a cover for a rotary joint of a thermal conduction. Its main function is to protect the rotary joint safely and be resistant and effective against the high temperatures that can present the thermal conduction. Rotating joints are a very important and sensitive element of the installation. The need to conveniently isolate these joints is the origin of the development of the present invention.
    [0047]
    [0048] Figure 1 shows a front view of an embodiment of the cover according to the invention, the cover (1) being closed to illustrate its placement in the installation. The detail in section AA shows the way in which the outer layer (2) and the inner layer (3) come together, leaving inside the insulating layer (4). Figures 2 and 3 show the external layers (2) and internal (3) of the cover (1) open, so that the different surfaces that compose them are appreciated.
    [0049]
    [0050] As seen in the figures, the cover (1) according to the invention comprises an outer layer (2), an insulating layer (4) and an inner layer (3) arranged around an axis (5). The axis (5) is coincident with the longitudinal direction of a pipe or thermal conduction (not shown in the figures), through which a thermal fluid flows at high temperatures. Said tube is normally provided at its ends with rotary joints. The rotary joints allow the tube to rotate to have the ability to follow the solar path. Thus, the captured luminance radiation is concentrated in the thermal fluid of an absorber or inlet tube and transported by a conductive or outlet tube to an exchanger, as will be explained in more detail below.
    [0051]
    [0052] The cover (1) according to the invention has the particularity of being provided with a closed contour (6) common to the outer layer (2) and the inner layer (3), both corrugated metal. Between the outer layer (2) and the inner layer (3) there remains an interior space (7) which is delimited by the outer layer (2), the inner layer (3) and the contour (6), as illustrated in FIG. the detail in section of Figure 1. In said interior space (7) is the insulating layer (4), completely isolated from an outer space (8) to the cover (1). In this way, the insulating layer (4) can be prevented from becoming impregnated with possible thermal fluid leaks. The choice of corrugated metal allows the metal to adequately absorb the expansions without deterioration. These expansions suffered by the material are due to the high temperatures of the inner layer (3), which is in contact with the rotating joint, since the rotary joint works at the same temperature as the thermal fluid it transports.
    [0053]
    [0054] Preferably, the outer (2) and inner (3) layers are made of corrugated stainless steel. This material presents an adequate resistance, ease of forming and good thermal behavior. The use of corrugated stainless steel also provides resistance to the external layer (2) against possible inclement meteorological and against concentrated solar radiation, which can be around 200 KW / m2.
    [0055]
    [0056] The corrugated stainless steel of the outer (2) and inner (3) layers has a low sheet thickness, which is in a preferred range of between 0.05 and 2 millimeters. The use of low thicknesses aims to reduce heat transmission from the inner layer (3), which works at temperatures that can exceed 550 ° C, towards the outer layer (2), which must have temperatures below 60 ° C. ° C in order to be handled by the operators when carrying out inspections. This reduction in temperature is achieved thanks to the low thickness of the outer (2) and internal (3) layers and the effect of the insulating layer (4). It is known that heat is transmitted by conduction, by convection and by radiation. In the cover (1) of the figures, the transmission by conduction is minimized by the low thickness of the layers of the cover (1), since the mass through which the heat circulates decreases. Convection transmission is minimized as the cover (1) is sealed. Finally, the transmission by radiation is minimized by the chosen insulation material.
    [0057]
    [0058] In the embodiment of Figures 2 and 3, the cover (1) is formed by two halves or parts (9, 10) connected in an articulated manner around an axis of rotation (11) parallel to the axis (5). This articulated connection allows both parts (9, 10) to be closed as shown in Figure 1. The connection between both parts (9, 10) can be made by a joining element (12), made of corrugated steel as the layer external (2) and the inner layer (3). In the embodiment of Figure 3, the joining element (12) is welded to both parts (9, 10). In another optional embodiment, the two parts (9, 10) can be supplied separately for later assembly in the installation.
    [0059]
    [0060] Optionally, the external (2) and internal (3) layers are manufactured by a single layer of low thickness corrugated stainless steel. This sheet can be shaped and cut by laser to generate the outer (2) and inner (3) layers of the cover (1).
    [0061] The invention also relates to a method of manufacturing a cover (1) adapted to the rotating joint to be insulated. The forming process of the particular cover (1) illustrated in the figures can be carried out by means of the steps indicated in more detail below.
    [0062]
    [0063] Initially a sheet is formed to generate the outer layer (2). The outer layer (2) comprises a central portion (2a) cylindrical arranged concentrically about the axis (5) and larger diameter than the inner layer (3) and the rotary joint. The outer layer (2) also comprises two peripheral portions (2b) of conical shape extending from the central part (2a) towards the axis (5) as shown in Figure 2. The outer layer (2) also contains a edge (2c) substantially flat as a perimeter. The edge (2c) delimits the central (2a) and peripheral (2b) parts.
    [0064]
    [0065] On the other hand, in order to form the inner layer (3), a mold is made to suit the rotating joint to be insulated. Next, a sheet of low-thickness corrugated steel is pressed onto the mold to form the inner layer (3). The surfaces of the different parts of the inner layer (3) are adapted to the different surfaces of the rotary joint. As shown in Figure 3, the inner layer (3) is formed by a central part (3a) cylindrically arranged concentrically about the axis (5), two peripheral parts (3b) conically shaped and arranged concentrically around of the shaft (5) on both sides of the central part (3a) and two substantially flat parts (3d) that extend in a direction substantially perpendicular to the axis (5). These substantially planar portions (3d) come into contact when the cover (1) is closed (as shown in Figure 1) and placed in the installation around the rotating joint and around the tubes (rotating joint and tubes not shown in FIG. Figure 1). Like the outer layer (2), the inner layer (3) has a substantially flat edge (3c) as a perimeter. The edge (3c) delimits the flat parts (3d) and the peripheral parts (3b).
    [0066] The fact that the inner layer (3) is shaped according to the rotary joint allows the cover (1) to rotate integrally with the rotary joint. That is, thanks to the surfaces (3a, 3b, 3c) of the inner layer (3), the cover (1) can be conveniently adapted to the rotary joint. This coupling helps to avoid that the rotations of the rotary joint wear the cover in its interior area and may break it. Thus, the method according to the invention makes it possible to improve the life of the cover (1).
    [0067]
    [0068] Once both external (2) and internal (3) layers are formed, the insulating layer (4) is introduced between both layers, as shown in Figure 1.
    [0069]
    [0070] Finally, as shown in the detail of the section A-A of Figure 1, an outline (6) can be formed consisting of the edges (2c, 3c) welded together and optionally reinforced with a piece of additional metal sheet. This optional implementation of the contour (6) allows to make the hermetic insulation of the insulating layer (4) in a simple way. Another alternative embodiment for forming the contour (6) comprises bending the edges (2c, 3c) on themselves before welding them.
    [0071]
    [0072] Optionally, the insulating layer (4) is made of a microporous material. This material allows the cover (1) to be used in pipes in which temperatures above 400 ° C are reached, thanks to the fact that it is a very resistant and very effective material.
    [0073]
    [0074] Also optionally, the insulating layer (4) can be made of glass fiber. As it is an economical material, this alternative allows to control the expenses of the installation and thus save on costs and repairs.
    [0075]
    [0076] In summary, the embodiment of the figures illustrates a cover (1) formed by two sheets of corrugated stainless steel, shaped and welded together to provide a hermetic cover (1) and effective isolation of the rotary joint. Materials are contemplated alternatives for the manufacture of the cover (1) as long as they provide the advantages referred to in relation to the absorption of dilatations, adequate thermal distribution and adequate insulation adequate to the requirements of the installation.
    [0077]
    [0078] In any case, thanks to the structural characteristics of the cover (1) according to the invention, an improvement of the insulating capacity and its energetic efficiency with respect to traditional systems with different types of insulation and variable working temperatures is achieved.
    [0079]
    [0080] Optionally, as shown in Figure 2, the contour (6) has an extension formed by two visor-shaped sections (13). The visor (13) is elongated and extends in the direction of the axis (5) and in opposite directions. Said visor (13) can be formed from the same sheet of corrugated stainless steel used for the manufacture of the outer layer (2) and the inner layer (3). It can be obtained, for example, by folding the edges (2c, 3c) by increasing the welded surface. The formation of the visor (13) contributes to improving and optimizing the adaptation of the cover (1) to the different tubes of the installation, joined by the rotary joints, as detailed below. The visors (13) of the cover (1) define an entrance area (14), where an inlet absorber tube is connected, which captures the light radiation and is arranged in the collector mirrors, and an exit zone (15). ), where a conductive or outlet pipe is connected, through which the thermal fluid or the molten salt circulates towards the exchanger of the system. As seen in Figure 1, the entrance (14) and exit (15) areas of the cover (1) have different diameters (16, 17) respectively corresponding to the absorber tube and the conductive tube (not shown in the drawings). figures) of the installation.
    [0081]
    [0082] The figures refer to an embodiment of a cover that adapts to a simple rotary joint. However, the rotary joints can be single or double depending on the configuration of the collectors. In the case of a double rotating joint, alternative embodiments are contemplated (not shown in the drawings). figures). In this case and by a similar procedure, the cover (1) is adapted to the double rotating joint, having, in this case, two exit areas (15) for both conductor tubes. The manufacturing materials used can be the same.
    [0083]
    [0084] Optionally, as shown in Figure 3, the cover (1) comprises a set of cavities (18) intended to house screws or grease nipples of the rotary joint. These screws comprise a longitudinal hole, through which lubricant or grease is introduced to lubricate the rotary joint. Said cavities (18), as shown in Figure 3, are formed by a collapse of an area of the central part (3a) of the inner layer (3) towards the outermost part of the cover (1). Optionally, the cavities (18) have a cylindrical shape, although they could present other alternative forms compatible with their function.
    [0085]
    [0086] Additionally, the outer layer (2) optionally comprises at least one connection element (19) intended to receive a quick closure to expedite the assembly and disassembly of the cover (1). In this way, it is possible to facilitate the inspection and maintenance work, without the need to replace covers (1) for breakage, a very frequent problem in traditional insulation. Furthermore, as shown in the embodiment of Figures 1 and 2, the connecting element (19) can comprise at least two lugs or projections in which each of the parts of a quick closure is fixed. A quick closing is a mechanism that normally uses a simple drive for easy installation and quick disassembly. Quick closures can be, for example; quick lever closures, traction closures, stainless steel spring closures or stainless steel wires.
    权利要求:
    Claims (16)
    [1]
    Cover (1) for a rotary joint of a thermal conduction, where the cover (1) comprises an outer layer (2), an insulating layer (4) and an inner layer (3) arranged around an axis (5) , characterized in that the outer layer (2) and the inner layer (3) are made of corrugated metal and that the cover (1) is provided with a closed contour (6), common to the outer layer (2) and to the inner layer (3), and of an interior space (7) delimited by the outer layer (2), the inner layer (3) and the contour (6), where the insulating layer (4) is arranged in the space interior (7) and completely isolated from an outer space (8) to the cover (1).
    [2]
    2. Cover (1), according to claim 1, characterized in that the outer layer (2) and the inner layer (3) are formed by a continuous metal foil.
    [3]
    3. Cover (1), according to claim 2, characterized in that the outer layer (2) comprises a central part (2a) cylindrical disposed around the axis (5), two peripheral parts (2b) of conical shape that are they extend from the central part (2a) towards the axis (5) and a substantially flat edge (2c) as a perimeter, where the edge (2c) delimits the central parts (2a) and the peripheral parts (2b).
    [4]
    Cover (1), according to claim 2, characterized in that the inner layer (3) comprises a central part (3a) cylindrical disposed around the axis (5), two peripheral parts (3b) of conical shape and arranged around the axis (5) on both sides of the central part (3a), two substantially flat parts (3d) extending in a direction substantially perpendicular to the axis (5) and a substantially flat edge (3c) as a perimeter, where the edge (3c) delimits the flat parts (3d) and the peripheral parts (3b).
    [5]
    Cover (1), according to claims 3 and 4, characterized in that the contour (6) is formed by the edges (2c, 3c) welded together.
    [6]
    Cover (1), according to claim 1, characterized in that the outer layer (2) and the inner layer (3) are formed by a sheet of stainless steel.
    [7]
    Cover (1), according to claim 6, characterized in that the stainless steel sheet has a low thickness of between 0.05 and 2 millimeters.
    [8]
    Cover (1), according to claim 1, characterized in that the insulating layer (4) is made of a microporous material.
    [9]
    Cover (1), according to claim 1, characterized in that the insulating layer (4) is made of glass fiber.
    [10]
    Cover (1), according to claim 1, characterized in that the contour (6) has two stretches in the form of a visor (13) elongated in the direction to the axis (5) and opposite directions.
    [11]
    Cover (1), according to claim 1, characterized in that it comprises two parts (9, 10) connected in an articulated manner about an axis of rotation (11) parallel to the axis (5).
    [12]
    Cover (1), according to claim 11, characterized in that the connection between the two parts (9, 10) is made by means of a joining element (12) of flexible corrugated steel welded to both parts (9, 10). ).
    [13]
    Cover (1), according to claim 1, comprising a set of cavities (18) for receiving screws of the rotary joint.
    [14]
    Cover (1), according to claim 1, characterized in that the outer layer (2) comprises a connection element (19) intended to receive a quick closure to expedite the assembly and disassembly of the cover (1).
    [15]
    15. Cover (1), according to claim 14, characterized because the connection element (19) comprises at least two lugs or projections.
    [16]
    16. Method of manufacturing a cover (1) for a rotary joint of a thermal conduction, comprising the steps of:
    - forming a sheet of corrugated metal to generate an outer layer (2) of the cover (1),
    - making a mold adapted to the shape of the rotary joint, - forming a corrugated metal sheet through the mold to generate an inner layer (3) of the cover (1),
    - place an insulating layer (4) between both external (2) and internal (3) layers, and
    - forming a closed contour (6), common to the outer layer (2) and the inner layer (3), so that the insulating layer (4) is disposed in an interior space (51) completely isolated from an outer space (8) to the cover (1).
    类似技术:
    公开号 | 公开日 | 专利标题
    ES2428616T3|2013-11-08|Solar collector, and installation of electric power generation comprising said solar collectors
    ES2615129T3|2017-06-05|Device for connecting a fixed conduit to an absorber tube of a solar thermal power plant
    ES2393763T3|2012-12-27|Solar Power Station with Turner
    US20090139515A1|2009-06-04|Solar thermal energy collector
    MX2008012118A|2008-12-03|Parabolic solar trough systems with rotary tracking means.
    ES2302485B1|2009-05-04|SOLAR THERMAL ENERGY CYLINDER-PARABOLIC COLLECTORS WITH NON-ROTARY FIXED TUBE.
    AU2011264424B2|2015-05-28|Apparatus and method for solar energy collection and conversion
    ES2425996A1|2013-10-18|Solar receiver panels
    ES2332306T3|2010-02-02|HEAT EXCHANGER, ESPECIALLY FOR POOLS.
    ES2713274A1|2019-05-20|COVER FOR A ROTARY BOARD OF A THERMAL DRIVING |
    WO2011113973A1|2011-09-22|Solar tower power plant economizer and plant operating method
    CN102422098B|2014-11-19|Getter support structure for a solar thermal power plant
    WO2013017721A1|2013-02-07|Solar radiation receiver
    ES2525196A1|2014-12-18|Thermally-insulated tubular-tower solar receiver comprising a system for harnessing energy losses
    ES2557735T3|2016-01-28|Receiver for solar power plant with extended life
    ES2395590B1|2013-12-18|RAPID UNION SYSTEM OF CONFORMED SHEETS.
    WO2017193506A1|2017-11-16|Heating and heat preservation joint device for petroleum pipe
    WO2012001183A1|2012-01-05|Coil solar receiver for a stirling disk and method for manufacturing same
    WO2011151488A1|2011-12-08|Concave receiver for stirling dish and manufacturing method therefor
    KR102174111B1|2020-11-04|Solar collector
    ES2437475B1|2014-07-07|Modular system for photovoltaic solar energy collection
    ES2735303B2|2020-12-28|OUTDOOR TOWER SOLAR RECEIVER
    CN203824125U|2014-09-10|High temperature heat collection device
    KR101028471B1|2011-04-14|Solar collecting apparatus
    ES2379061B1|2013-02-28|THERMAL SOLAR RECEIVER.
    同族专利:
    公开号 | 公开日
    ES2713274B2|2020-09-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3724491A|1970-04-06|1973-04-03|K Knudsen|Removable valve insulation and cover|
    WO1991002143A1|1989-07-31|1991-02-21|Manville Corporation|Insulated exhaust pipe and method and means for producing and connecting same|
    DE102010025554A1|2010-06-29|2011-12-29|Dbw Holding Gmbh|Mold part e.g. shield, for e.g. thermal shielding of pipe system of internal combustion engine in vehicle, has form regions connected with one another such that regions are brought together to surface in region of elements|
    法律状态:
    2019-05-20| BA2A| Patent application published|Ref document number: 2713274 Country of ref document: ES Kind code of ref document: A1 Effective date: 20190520 |
    2020-09-17| FG2A| Definitive protection|Ref document number: 2713274 Country of ref document: ES Kind code of ref document: B2 Effective date: 20200917 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201731335A|ES2713274B2|2017-11-17|2017-11-17|COVER FOR A ROTATING JOINT OF A THERMAL PIPE|ES201731335A| ES2713274B2|2017-11-17|2017-11-17|COVER FOR A ROTATING JOINT OF A THERMAL PIPE|
    [返回顶部]