• 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:
    A joint (20) for systems for transporting a high temperature heat-transfer fluid comprises a fixed conduit (F), a first sealing ring (40) joined to the fixed conduit (F), a permanently rotating duct (R) in abutment with the sealing ring (40), an outer casing (112) that delimits a chamber (110) wherein the contact region between the rotatable conduit (R) and the first sealing ring (40) is arranged. The outer casing (112) is sealingly engaged with the rotatable conduit (R) by means of a second sealing ring (90) and with the fixed conduit (F).
    公开号:ES2715513A2
    申请号:ES201890084
    申请日:2018-10-15
    公开日:2019-06-04
    发明作者:Paolo Piacenti；Fabrizio Ragni；Massimiliano Borasso
    申请人:UMBRA MECCANOTECNICA；Meccanotecnica Umbra SpA；
    IPC主号:
    专利说明:

    [0001]
    [0002] Gasket for high temperature fluid
    [0003]
    [0004] The object of the present invention is a gasket for high temperature fluids, which can be used, for example, in concentrating systems for the conversion of solar energy.
    [0005]
    [0006] These types of systems consist of a large number of modules, in the jargon called "loops", installed in a fairly large area. For example, a medium-small concentrator system, capable of providing 50 MW of power, typically covers an area of 10 hectares and has 150 loops.
    [0007]
    [0008] Each module comprises a plurality of parabolic mirrors and a local circuit for the heat transfer fluid, connected at the entrance with a forward branch of a distribution network and at the exit with a return branch of said network.
    [0009]
    [0010] In order to maximize the thermal effect of solar energy, the main section of the local circuit is placed at the focus of the parabolic surfaces and the mirrors of each module are rotating to follow the apparent path of the sun.
    [0011]
    [0012] Therefore, the heat transfer fluid can reach temperatures of up to 400 ° C, which guarantees optimum system performance.
    [0013]
    [0014] However, at these temperatures, the diathermic oil passes into the vapor phase, which causes unavoidable leakage at the local circuit connection points (subject to the tracking rotation) with the branch forward and with the return branch of the circuit. the distribution network (which, in turn, are fixed).
    [0015]
    [0016] At said connection points, therefore, it is necessary to provide special gaskets capable of guaranteeing, even at high temperature, the vapor tightness between a rotating duct, ie the incoming terminal section or the terminal section leaving the local circuit , and a fixed conduit, that is, respectively, the forward section of the distribution network or the return section of the latter.
    [0017]
    [0018] It has been found that the boards currently used do not meet this requirement. On the contrary, said joints usually allow a quantity of steam to escape, with a considerable environmental damage (diathermic oil is highly polluting), system inefficiencies and high maintenance costs.
    [0019]
    [0020] The object of the present invention is to provide a joint capable of satisfying the aforementioned requirements.
    [0021]
    [0022] Said objective is achieved by a seal according to claim 1. The dependent claims define other advantageous embodiments of the invention.
    [0023]
    [0024] The features and advantages of the gasket according to the present invention will be apparent from the description given below, provided by way of non-limiting example, in accordance with the accompanying figures, in which:
    [0025]
    [0026] - figure 1 shows a diagram of a module of a concentrator system for the conversion of solar energy;
    [0027]
    [0028] - figure 2 illustrates a region of the system in figure 1;
    [0029]
    [0030] - Figure 3 shows a gasket according to an embodiment of the invention; Y
    [0031]
    [0032] - Figure 4 shows a longitudinal section of the joint of figure 3.
    [0033]
    [0034] With reference to the accompanying figures, a concentrator system for the conversion of solar energy is indicated collectively with 1.
    [0035]
    [0036] The system 1 comprises a plurality of base modules 2, in the jargon called "loops", comprising a series of parabolic mirrors 4 and a local circuit 6 for the transport of a heat transfer fluid, in general a diathermic oil.
    [0037]
    [0038] Each local circuit 6 comprises a receiver section 8 positioned along the imaginary line identified by the geometrical approach of the parabolic surfaces of said mirrors 4, a local input section 10 for bringing the "cold" fluid to the receiving section 8, and a local outlet section for transporting the "hot" fluid originating in the receiving section 8.
    [0039] The mirrors of the module 2 are rotating to follow the apparent path of the sun, in order to maximize the solar energy flow in the receiving section 8 of the local circuit 6.
    [0040]
    [0041] The system 1 further comprises a distribution network for the heat transfer fluid, which joins the modules of said system.
    [0042]
    [0043] In particular, the network comprises a network input section 14 provided for connection to the local input section 10, and a network output section intended to be connected to the local output section.
    [0044]
    [0045] During normal operation of the system, the local input section 10 and the local output section rotate around its own axis, while the network input section 14 and the network output section are fixed.
    [0046]
    [0047] A joint 20 is provided for the connection of the local input section 10 and the local output section with the network input section 14 and the network output section respectively.
    [0048]
    [0049] The seal 20 comprises a fixed conduit F which is not subject to rotation during normal operation of the system.
    [0050]
    [0051] The fixed conduit F comprises a fixed tubular element 22 having an extension along a rectilinear axis X between an external end 24 and an opposite internal end 26.
    [0052]
    [0053] Depending on the embodiment, the gasket 20 comprises a first connection flange 28 which is fixed to the outer end 24 of the fixed tubular element 22, for example by welding. The first connection flange 28 is suitable for connecting the joint 20 to the network input section 14 or to the network output section, by means of bolts.
    [0054]
    [0055] Alternatively, the outer end 24 of the fixed tubular element 22 is connected to the network input section 14 or to the network output section by welding.
    [0056]
    [0057] Preferably, the fixed conduit F further comprises an elastic conduit 30, which is axially deformable elastically and coaxially to the fixed tubular element 22; for example, said elastic conduit 30 is made as a metal bellows.
    [0058] Further, preferably, the gasket 20 comprises a first flange 32, located between the inner end 26 of the fixed tubular element 22 and the elastic conduit 30, welded thereto. The hole of said first flange 32 forms part of the fixed conduit F.
    [0059]
    [0060] Depending on the embodiment variant, the fixed tubular element and the first flange are made in one piece, for example, by die-casting.
    [0061]
    [0062] According to an alternative embodiment (not shown), the elastic conduit is welded directly to the internal end 26 of the fixed tubular element 22.
    [0063]
    [0064] The seal 20 further comprises a first dynamic seal consisting of a first sealing ring 40, attached to the fixed conduit F.
    [0065]
    [0066] Preferably, said first sealing ring 40 is attached to the elastic conduit 30, for example welded on the side opposite the fixed tubular element 22, and coaxial thereto.
    [0067]
    [0068] According to an alternative embodiment (not shown), the first sealing ring 40 is attached directly to the inner end 26 of the fixed tubular element 22, while the elastic conduit is disposed along the fixed conduit F, in one position different.
    [0069]
    [0070] Furthermore, preferably, the seal 20 comprises a second flange 42, which surrounds the elastic conduit 30, fixed, for example, by bolts, to the first flange 32, with the interposition of a first static joint 44.
    [0071]
    [0072] The seal 20 further comprises a rotary duct R, which, in normal operation of the joint, rotates around its own axis.
    [0073]
    [0074] The rotary duct R comprises a bushing 50, in permanent contact with the first sealing ring 40, with which it is coaxial.
    [0075]
    [0076] For example, the first sealing ring 40 is permanently pushed by the elastic conduit 30 in contact with said bushing 50 to guarantee the relevant seal.
    [0077]
    [0078] Depending on the embodiment, the bushing 50 comprises a bushing stem 52 in contact with the first sealing ring 40, and a bushing rim 54 projecting radially from the bushing stem 52.
    [0079] The bushing 50 is supported in a rotary manner, such as by a bearing 56; for example, the bearing 56 is mounted to support the bushing flange 54.
    [0080]
    [0081] The seal 20 further comprises a first housing component 60 that encloses, at least partially, said bushing 50 and is connected, for example, by bolts, to the second flange 42, with the interposition of a second static seal 62.
    [0082]
    [0083] Preferably, the first housing component 60 supports the ball bearing 56, also obtaining an axial stop 64 thereto.
    [0084]
    [0085] The gasket 20 further comprises a second housing component 66 that encloses, at least partially, the bushing 50 and is connected to the first housing component 60, for example by bolts, with the interposition of a third static gasket 68.
    [0086]
    [0087] The second housing component 66 preferably forms an additional axial stop 70 for the bearing 56.
    [0088]
    [0089] In addition, the rotary duct R comprises a rotating tubular element 80 with extension along a rectilinear axis Y, coinciding with the axis X of the fixed tubular element 22, between an external end 82 and an opposite internal end 84.
    [0090]
    [0091] The internal end 84 is connected, preferably by welding, to the bushing 50. According to a variant embodiment, the rotary tubular element and the bushing are made in one piece, for example by die-casting.
    [0092]
    [0093] The external end 82, on the other hand, is provided for connection to the local input section 10 or to the local output section of the distribution network.
    [0094]
    [0095] According to one embodiment, the gasket 20 comprises a second connection flange 86 which is fixed to the outer end 82 of the rotary conduit 80, for example by welding. The second connecting flange 86 is suitable for connecting the joint 20 to the local input section 10 or to the local output section by bolts.
    [0096]
    [0097] Alternatively, the outer end 82 of the rotating tubular element 80 is connected to the local input section 10 or to the local output section by welding.
    [0098]
    [0099] The seal 20 further comprises a second dynamic seal consisting of a second sealing ring 90, which provides a seal between the second housing component 66 (fixed) and the rotating tubular element 80.
    [0100]
    [0101] In particular, the second housing component 66 internally comprises an annular exit wall 92, penetrated by the rotary tubular element 80. The second sealing ring 90 is permanently compressed axially against the exit wall 92 of the second housing component 66 and radially against the external surface of the rotating tubular element 80 and against the inner surface of the outlet wall 92.
    [0102]
    [0103] Preferably, to make the second dynamic seal, the seal 20 provides a packing box device 100 that functions permanently in the second sealing ring 90.
    [0104]
    [0105] For example, said packing box device 100 comprises a sleeve 102 coaxial to the rotating tubular element 80, partially inserted in the second housing component 66, until it comes into contact with the second sealing ring 90.
    [0106]
    [0107] The packing box device 100 further comprises a plurality of screws 104, which slidably engage the sleeve 102 and are screwed into the second housing component 66, and a respective plurality of springs 106, each of which operates between the respective screw head 104 and the sleeve 102.
    [0108]
    [0109] The tightening of the screws 104 in the second housing component 66 therefore generates an axial load on the sleeve 102 due to the springs 106, such as to permanently press the second sealing ring 90.
    [0110]
    [0111] Finally, the gasket 20 has a chamber 110 inside, in which is the region of contact between the first sealing ring 40, integral with the fixed conduit F, and the rotary conduit R, and in particular with the bushing 50.
    [0112]
    [0113] Said chamber 110 is delimited by an external casing 112 which, in the illustrated embodiment, comprises the first flange 32, the second flange 42, the first casing component 60 and the second casing component 66.
    [0114] The chamber 112 is sealed with respect to the external environment by virtue of the second dynamic joint cooperating with the rotating tubular element 80 emerging from said external housing 112, which comprises in particular the second sealing ring 90 and at least one static seal, one for each component of the outer casing 112 (in particular the first 44, the second 62 and the third static joint 68).
    [0115]
    [0116] Once the gasket 20 is assembled at the beginning of its use, the chamber 110 is at atmospheric pressure.
    [0117]
    [0118] During the use of the system, a quantity of steam, however small, escapes from the first dynamic seal between the fixed conduit R and the bushing 50 of the rotary conduit R, while remaining confined within the chamber 110.
    [0119]
    [0120] Advantageously, this reduces the pressure gradient between the fluid passing through the seal and the chamber, thereby reducing the same tendency to leakage.
    [0121]
    [0122] However, the vapor pressure in the chamber is very low if the joint is functioning correctly, so that the vapor remains almost confined in the chamber 110, due to the second dynamic seal and the static seals.
    [0123]
    [0124] According to one embodiment, the seal 20 further comprises a pressure sensor 200 suitable for detecting the pressure in the chamber 110.
    [0125]
    [0126] Said sensor is furthermore suitable for transmitting a pressure signal outside the chamber 110, for example, through a cable or preferably using wireless technology.
    [0127]
    [0128] Advantageously, the pressure sensor allows to control the pressure inside the chamber; if said pressure increases significantly, it is very likely that a malfunction of the first dynamic seal will occur, for example, due to wear on the first sealing ring. In this case, the pressure measurement allows proper maintenance work to be carried out.
    [0129]
    [0130] In addition, as mentioned above, such systems, although of medium-small size, occupy very large areas. The presence of the pressure sensor and the transmission means that allow the pressure signal to be transmitted to a remote area, such as a system management control unit, greatly facilitates the management of the system and the execution of maintenance activities specifically directed to the board indicating the malfunction.
    [0131]
    [0132] It is clear that a person skilled in the art, in order to satisfy the contingent needs, can make changes in the device described above, all within the scope of the protection defined by the following claims.
    权利要求:
    Claims (10)
    [1]
    1. Gasket (20) for systems for transporting a high temperature heat transfer fluid, characterized in that it comprises:
    - a fixed conduit (F);
    - a first sealing ring (40) attached to the fixed conduit (F);
    - a rotating duct (R) in permanent contact with the sealing ring (40);
    - an outer casing (112) delimiting a chamber (110) from which said fixed conduit (F) and said rotary conduit (R) extend, wherein the contact region is disposed between the rotary conduit (R) and the first sealing ring (40);
    wherein the outer casing (112) is hermetically coupled with the rotary duct (R) by means of a second sealing ring (90) and with the fixed duct (F).
    [2]
    2. Gasket according to claim 1, characterized in that the first sealing ring (40) is pressed permanently in contact with the rotary duct (R).
    [3]
    3. Seal according to claim 2, characterized in that the fixed conduit (F) comprises an elastic conduit (30) elastically deformable in an elastic manner.
    [4]
    Board according to any one of the preceding claims, characterized in that the outer casing (112) comprises an annular outlet wall (92), through which the rotary duct (R) passes, and the second sealing ring (90) is permanently compressed axially against the outlet wall (92) and radially against the rotary duct (R).
    [5]
    A gasket according to claim 4, characterized in that it comprises a packing box device (100) operating on the second sealing ring (90).
    [6]
    Gasket according to any one of the preceding claims, characterized in that the outer casing (112) comprises casing components (60,66) and / or flanges (32,42), connected to each other in a sealed manner by means of static joints (44). , 62, 68).
    [7]
    Gasket according to any one of the preceding claims, characterized in that the rotary duct (R) comprises a bushing (50) placed in contact with the first sealing ring (40), said bushing being rotatably supported inside the housing external (112).
    [8]
    Board according to any of the preceding claims, characterized in that it comprises a pressure sensor (200) housed in said chamber (110) and suitable for detecting the pressure in said chamber (110) and for transmitting a pressure signal to the outside of the outer casing (112).
    [9]
    9. Concentrator system for the conversion of solar energy, characterized in that it comprises:
    - a plurality of modules (2), wherein each module (2) comprises a plurality of rotating mirrors (4) and a local circuit (6) for the heat transfer fluid, wherein the local circuit (6) comprises a receiving section (8), a local input section (10) and a local output section;
    - a distribution network for fluidly connecting said modules (2), comprising a network input section (14), provided to connect to the local input section (8), and a network output section, intended to be connected to the local exit section;
    - a plurality of joints (20), each joint connecting the local input section (10) or the local output section of the module (2) with the network input section (14) or the network output section of the distribution network respectively.
    [10]
    System according to claim 9, when it depends on claim 8, characterized in that it also comprises:
    - transmission means for remote transmission of the pressure signal from each joint
    ( 2 );
    - a management unit to receive and process pressure signals.
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    同族专利:
    公开号 | 公开日
    ES2715513R1|2019-07-19|
    ES2715513B2|2020-05-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    ES2788802A1|2020-07-09|2020-10-22|Centro De Investig Energeticas Medioambientales Y Tecnologicas Ciemat|DEVICE FOR MEASURING FORCES AND MOMENTS IN JOINTS FOR CYLINDROPARABOLIC SOLAR COLLECTORS |DE1201135B|1957-04-05|1965-09-16|Fmc Corp|Connection of two rotatable tubular coupling parts|
    DE102007025209B4|2007-05-30|2013-01-17|Mosmatic Ag|Solar power station with turning device|
    DE102007048745B4|2007-10-08|2017-04-20|Senior Flexonics Gmbh|Device for connecting a permanent line with an absorber tube of a solar thermal power plant|
    US8783733B2|2011-01-24|2014-07-22|Delaware Capital Formation, Inc.|Fluid handling swivel joints and fluid conveyance equipment incorporating the same|
    EP2525125A1|2011-05-19|2012-11-21|Huhnseal AB|High temperature axial seal and method|
    ITUA20162117A1|2016-03-30|2017-09-30|Umbra Meccanotecnica|JOINT FOR SOLAR SYSTEMS IN CONCENTRATION|
    CN107143707A|2017-06-30|2017-09-08|天津滨海设备配套技术有限公司|Butt sealing formula high temperature pipe and dock swivel joint|
    CN107191715A|2017-06-30|2017-09-22|天津滨海设备配套技术有限公司|High temperature rotary joint|
    法律状态:
    2019-06-04| BA2A| Patent application published|Ref document number: 2715513 Country of ref document: ES Kind code of ref document: A2 Effective date: 20190604 |
    2019-07-19| EC2A| Search report published|Ref document number: 2715513 Country of ref document: ES Kind code of ref document: R1 Effective date: 20190712 |
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    优先权:
    申请号 | 申请日 | 专利标题
    IT201700138814|2017-12-01|
    PCT/IB2018/057974|WO2019106450A1|2017-12-01|2018-10-15|Joint for high temperature fluid|
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