• 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:
    Device for measuring forces and moments in a kinematic joint (6) of a parabolic trough solar collector comprising a torque measurement flange (1) on the axis of rotation of the kinematic joint, a first load cell (2) parallel to the axis of rotation of the kinematic joint, a second load cell (3) and a third load cell (4) in a position perpendicular to the axis of rotation of the kinematic joint, and a bearing (5), where the first load cell load (2) measures the compression and traction force of the kinematic joint (6), the second load cell (3) and the third load cell (4) measure the forces perpendicular to the axis of rotation of the kinematic joint and the bearing (5) allows the tracking of the load cells during a rotation of the kinematic joint (6). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2788802A1
    申请号:ES202030703
    申请日:2020-07-09
    公开日:2020-10-22
    发明作者:Martín Rafael Antonio López；Gutiérrez Loreto Valenzuela
    申请人:Centro de Investigaciones Energeticas Medioambientales y Tecnologicas CIEMAT；
    IPC主号:
    专利说明:

    [0001] DEVICE FOR MEASURING FORCES AND MOMENTS IN JOINTS
    [0003] Field of the invention
    [0004] The present invention relates to a device for measuring the forces and moments acting on the kinematic joints of parabolic trough solar collectors. Among the possible examples in which the present invention could be used, applications such as the characterization of the thermo-mechanical behavior of joint joints of solar collectors, durability studies and determination of problems in the installation of kinematic joints in solar collectors stand out. parabolic troughs.
    [0006] Background of the invention
    [0007] Parabolic trough solar collectors represent the most mature technology in the field of concentrating solar thermal collectors. The principle of operation is based on a set of mirrors or concentrator that follow the Sun throughout the day. The arrangement of the mirrors in the concentrator is that of a channel whose section is parabola-shaped.
    [0009] The solar tracking system allows the concentrator to reflect direct solar radiation towards a line of focus on which the receiver is located. Since the surface of the mirrors is larger than the surface of the receiver that receives the reflected solar radiation, said radiation is concentrated in proportion to the ratio of the area of the reflectors to that of the receiver. Subsequently, the energy absorbed by the receiver is transferred to a heat transfer fluid (normally pressurized water, water / steam or thermal oil) that circulates inside it, which increases its enthalpy. The thermal fluid transports this thermal energy of solar origin to the consumption system.
    [0011] A parabolic trough solar collector usually consists of:
    [0012] - a foundation, which supports the weight of the collectors and the loads for which they were designed and fixes them to the ground;
    [0013] - a structure that gives rigidity to the set of elements that make up the collector and acts as an interface with the foundation;
    [0014] - a parabolic trough reflector, which reflects solar radiation by concentrating it on the linear receiver, the parabolic trough reflector is shaped like a section channel parabolic;
    [0015] - a linear receiver, which is a metallic absorbing tube located in the focal line of the parabolic trough reflector where the conversion of concentrated solar radiation into thermal energy on the wall of the tube is carried out and which transmits to a heat transfer fluid that circulates through its interior that cools the absorbent;
    [0016] - a transmission, which is a mechanism that operates the sensor to monitor the apparent movement of the Sun in the sky throughout the day; - a solar tracking system, which is an orientation and tracking system in charge of adjusting the position of the collector so that the performance is maximum;
    [0017] - kinematic joints, which are sealing elements that conduct the heat transfer fluid between rotating parts or between a rotating part and a fixed one, allowing solar tracking movement while absorbing thermal expansions between both parts; Y
    [0018] - a heat transfer fluid, which is the fluid that transports the thermal energy obtained in the linear receiver to the consumption system.
    [0020] To obtain the temperature demanded by the consumption system, several collectors are joined in series to form rows, and to obtain the desired thermal power, several of these rows are joined in parallel, this set forming the solar field. The transport of thermal energy from the solar field to the consumption system is carried out through the process pipes. The linear receiver moves jointly with the parabolic trough reflector during solar tracking, while the process pipes remain fixed. The connection of the solar receiver of a collector with another annex or with the installation process piping must allow the solar monitoring carried out by each collector and the differences in thermal expansion between the different elements. The elements that allow these connections are the kinematic joints.
    [0022] Originally, when this solar technology began to be developed, these connections were made exclusively through flexible tubes, but nowadays rotary joints and roto-flexible tubes are used to improve the durability of the tubes responsible for these connections.
    [0024] Roto-flexible tubes can be bent as necessary to allow the collector to rotate until reaching the desired position as well as to absorb the longitudinal expansions of the receiver tube. The rotating joints allow the rotation of the collector accepting an inclination of 15 ° being able to absorb the longitudinal expansions.
    [0026] The use of these joining elements, which must have the ability to absorb the rotations of the solar collector, nevertheless presents a series of operational drawbacks related to durability, causing leaks of the heat transfer fluid and even breakage of the joints. The final consequences of these inconveniences are, as a minimum, stoppage of collectors for the repair or replacement of the gaskets, losses of heat transfer fluid and even the possibility of fires in the solar fields where they are installed. All this translates into economic losses and pollution, when thermal fluids are used that can cause this particular problem, such as some thermal oils.
    [0028] In the state of the art, several documents related to the measurement of forces and / or durability tests in rotating joints, roto-flexible tubes and other types of flexible joints, as well as the use of strain gauges in fluid conduction elements, are known. . For example, document EP3225804A1 is known, which discloses a method for determining the position of the assembly of a spherical joint for coupling exhaust pipes to each other in an exhaust system, and an exhaust system, which makes it possible to dampen engine vibrations more effective, where strain gauges are attached at a plurality of locations in an exhaust system, simulated vibrations that simulate engine vibrations are transmitted to the end of the upstream side of the exhaust system, and the bending stress is measured at each strain gauge. Based on the bending stress measured in each strain gauge, a position is detected in which a bending moment is generated that is equal to or greater than or equal to an amount of torque that generates a maximum static friction force between a Spherical inner circumference surface and a circumferential outer spherical surface of a ball joint contacting each other, and the detected position is determined as the disposition position of the ball joint.
    [0030] Document JP2002055000A is also known which discloses a device capable of measuring with great precision the weight of a fluid and powder under pressure that passes through the pipe and an expansion joint by providing a load cell capable of accurately measuring the force external pressure applied to the pipeline and expansion joint, such as pressure reaction by internal pressure in the expansion joint to pass the pressurized fluid and dust and the spring reaction of the expansion joint. To fix the technical problem The device object of the invention, the load cell installed in an applied load structure, such as the pipe and measuring a load that acts on the structure, the load cell is characterized by inserting a part of the load cell to directly detect the load applied to a pressure-receiving side flange part the pressure-receiving side flange part connected to the structure and to which the structure load is directly transmitted and a support side flange part arranged opposite to the side pressure receiving flange part.
    [0032] Document CN109895030A is also known, which discloses a traction compression tool, where the traction compression tool comprises a first fixed device, a second fixed device and an actuating device, in which a first retention space is formed between two first vertical plates and a first bottom plate of the first fixed device and is used to install a first flange of the expansion joint; and a second retaining space is formed between two second vertical plates and a second bottom plate of the second fixed device and is used to install a second flange of the expansion joint, where the first fixed device and the second fixed device can be arranged in the corresponding first flange and the corresponding second flange, and the actuator can make the second flange move relative to the first flange to stretch or compress a corrugated pipe between the two flanges, so that the expansion joint is loaded quickly and stably, and especially, one-sided stretching or compression loading operation can be performed; And the pull compression tool is simple, convenient and easy to install, disassemble and adjust.
    [0034] Description of the invention
    [0035] The object of the invention is a device for measuring forces and moments in a kinematic joint of a parabolic trough solar collector, where the kinematic joint has an axis of rotation.
    [0037] The device for measuring forces and moments in a kinematic joint of a parabolic trough solar collector, object of the invention, comprises a torque measurement flange located on the axis of rotation of the kinematic joint, a first load cell located parallel to the axis rotation of the kinematic joint, a second load cell located in a position perpendicular to the axis of rotation of the kinematic joint, a third load cell located perpendicular to the second load cell, and a bearing, where the first load cell is configured to measure the compression and traction force of the joint kinematics, the second load cell and the third load cell are configured to measure forces perpendicular to the axis of rotation of the kinematic joint and the bearing is configured to allow tracking of the load cells during a rotation of the joint during its functioning.
    [0039] The device for measuring forces and moments in a kinematic joint of a parabolic trough solar collector, object of the invention, comprises a first support formed by a first leg and a second leg, between which the first load cell is located; such that the first leg is attached to the bearing and the second leg is attached to a collar located in such a position that between the bearing and the collar the kinematic joint is located; a second L-shaped support, such that the second support is attached at one end to the bearing and at the opposite end is attached to the second load cell which, in turn, is attached to the collar; and a third L-shaped support, such that the third support is attached at one end to the bearing and at the opposite end is attached to the third load cell which, in turn, is attached to the collar.
    [0041] In the device for measuring forces and moments in a kinematic joint of a parabolic cylinder solar collector object of the invention, at least one element to choose from: the torque measurement flange, the first load cell, the second load cell, the third load cell and the bearing comprise a thermal insulation coating.
    [0043] In the device for measuring forces and moments in a kinematic joint of a parabolic cylinder solar collector object of the invention, at least one element to choose from: the torque measurement flange, the first load cell, the second load cell, the third load cell and the bearing comprise a temperature measurement sensor.
    [0045] Brief description of the drawings
    [0046] To complement the description that is going to be made below and in order to aid in a better understanding of the characteristics of the invention, this description is accompanied by a set of drawings based on which the innovations and innovations will be more easily understood. advantages of the object of the invention.
    [0048] Figure 1 shows a side view of the device for measuring forces and moments in kinematic joints of parabolic trough solar collectors object of the invention.
    [0049] Figure 2 shows a perspective view of the device for measuring forces and moments in kinematic joints of parabolic trough solar collectors object of the invention.
    [0051] Figure 3 shows a perspective view of the device for measuring forces and moments in kinematic joints of parabolic trough solar collectors object of the invention different from that of figure 2.
    [0053] The numerical references used in the figures are:
    [0054] 1. torque measurement flange,
    [0055] 2. first load cell,
    [0056] 3. second load cell,
    [0057] 4. third load cell,
    [0058] 5. bearing,
    [0059] 6. kinematic joint,
    [0060] 7. collar,
    [0061] 8. first leg,
    [0062] 9. second leg,
    [0063] 10. second bracket, and
    [0064] 11. third support.
    [0066] Detailed description of the invention
    [0067] The object of the invention is a device for measuring forces and moments in kinematic joints (6) of parabolic trough solar collectors comprising:
    [0068] - a torque measurement flange (1) located on a rotation axis of the kinematic joint (6) of the solar collector,
    [0069] - a first load cell (2) located parallel to the axis of rotation of the kinematic joint (6) of the sensor, which measures the compression and traction force of the joint, and
    [0070] - a second load cell (3) located in a position perpendicular to the axis of rotation of the kinematic joint (6) that measures the forces perpendicular to said axis of rotation of the kinematic joint (6),
    [0071] - A third load cell (4) located perpendicular to the second load cell (3) and, like the aforementioned second load cell (3), measures the forces perpendicular to the axis of rotation of the kinematic joint (6 ); Y
    [0072] - a bearing (5) that allows the monitoring of the load cells (3, 4, 5) during a rotation of the joint during its operation.
    [0074] The geometric configuration of the device in Figure 1, as set out below, is designed so that it is possible to measure the forces and moments that act on the kinematic joint (6) during its entire follow-up movement to the sensor, allowing to the kinematic joint (6) its normal movement during the operation of the parabolic trough sensor.
    [0076] The first load cell (2) is located parallel to the axis of rotation of the kinematic joint (6) by means of a first support formed by a first leg (8) and a second leg (9) such that the first leg (8) it is attached to the bearing (5) and the second leg (9) is attached to a collar (7) located in a position such that between the bearing (5) and the collar (7) the kinematic joint (6) is located;
    [0078] The second load cell (3) is located perpendicular to the axis of rotation of the kinematic joint (6) by means of a second L-shaped support (10), such that the second support (10) is attached at one end to the bearing (5) and at the opposite end it is attached to the second load cell (3) which, in turn, is attached to the collar (7).
    [0080] The third load cell (4) is located perpendicular to the axis of rotation of the kinematic joint (6) by means of a third support (11) with an L shape, such that the third support (11) is attached at one end to the bearing (5) and at the opposite end it is attached to the third load cell (4) which, in turn, is attached to the collar (7).
    [0082] The present invention contemplates that each of the sensors (1,2, 3 and 4) and the bearing (5) have the appropriate thermal insulation to avoid damage to said components due to heat transmission or secondary reflections of solar radiation. coming from the optical surface of the parabolic cylinder sensor, also providing, in the preferred embodiment of the invention, each of them with a temperature measurement sensor (not represented in the figures).
    [0084] The rotating position of the kinematic joint (6) can be determined by the rotating position of the collector, since the movement of the kinematic joint (6) is integral to the movement of the collector in its solar tracking, or by the measurement that provide an angle encoder located on the axis of rotation of the kinematic joint (6).
    权利要求:
    Claims (1)
    [0001]
    1- Forces and moments measurement device in a kinematic joint (6) of a parabolic trough solar collector, where the kinematic joint (6) has an axis of rotation, characterized in that the device comprises:
    - a torque measurement flange (1) located on the axis of rotation of the kinematic joint (6),
    - a first load cell (2) located parallel to the axis of rotation of the kinematic joint (6),
    - a second load cell (3) located in a position perpendicular to the axis of rotation of the kinematic joint (6),
    - a third load cell (4) located perpendicular to the second load cell (3), and
    - a bearing (5),
    where the first load cell (2) is configured to measure the compression and traction force of the kinematic joint (6), the second load cell (3) and the third load cell (4) are configured to measure the forces perpendicular to the axis of rotation of the kinematic joint (6) and the bearing (5) is configured to allow the tracking of the load cells (2, 3, 4) during a rotation of the joint during its operation.
    2- Device for measuring forces and moments in a kinematic joint (6) of a parabolic trough solar collector according to claim 1, characterized in that it comprises:
    - a first support formed by a first leg (8) and a second leg (9), between which the first load cell (2) is located; such that the first leg (8) is attached to the bearing (5) and the second leg (9) is attached to a collar (7) located in a position such that between the bearing (5) and the collar (7) is located the kinematic joint (6);
    - A second L-shaped support (10), such that the second support (10) is attached at one end to the bearing (5) and at the opposite end is attached to the second load cell (3) which, at its once, it is attached to the collar (7);
    - A third support (11) with an L shape, such that the third support (11) is attached at one end to the bearing (5) and at the opposite end is attached to the third load cell (4) which, at its Once, it is attached to the collar (7).
    3- Device for measuring forces and moments in a kinematic joint (6) of a parabolic trough solar collector according to any of claims 1 to 2, characterized in that at least one element to choose from: the torque measurement flange (1), the first load cell (2), the second load cell (3) , the third load cell (4) and the bearing (5), comprise a thermal insulation coating.
    4- Device for measuring forces and moments in a kinematic joint (6) of a parabolic trough solar collector according to any of claims 1 to 3, characterized in that at least one element to choose from: the torque measurement flange (1) , the first load cell (2), the second load cell (3), the third load cell (4) and the bearing (5), comprise a temperature measurement sensor.
    类似技术:
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    同族专利:
    公开号 | 公开日
    ES2788802B2|2021-03-10|
    WO2022008767A1|2022-01-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20120187675A1|2011-01-24|2012-07-26|Delaware Capital Formation, Inc.|Fluid Handling Swivel Joints and Fluid Conveyance Equipment Incorporating The Same|
    US20180045499A1|2015-02-13|2018-02-15|The Victaulic Company Of Japan Limited|Behavior inspection apparatus and behavior inspection method for extensible flexible pipe joint|
    US20170219152A1|2016-02-01|2017-08-03|Deublin Company|Rotary union with integral sensor array|
    ES2715513A2|2017-12-01|2019-06-04|Umbra Meccanotecnica|Joint for high temperature fluid|
    WO2019206480A1|2018-04-23|2019-10-31|Christian Maier GmbH & Co. KG|Dynamic seal and rotary feedthrough comprising a dynamic seal of this kind|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES202030703A|ES2788802B2|2020-07-09|2020-07-09|DEVICE FOR MEASURING FORCES AND MOMENTS IN JOINTS FOR CYLINDROPARABOLIC SOLAR COLLECTORS|ES202030703A| ES2788802B2|2020-07-09|2020-07-09|DEVICE FOR MEASURING FORCES AND MOMENTS IN JOINTS FOR CYLINDROPARABOLIC SOLAR COLLECTORS|
    PCT/ES2021/070419| WO2022008767A1|2020-07-09|2021-06-08|Device for measuring forces and moments at the joints for cylindrical-parabolic solar collectors|
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