• 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 consists of a mobile device for protecting a pyrometric probe type temperature measurement element (1) for combustion chambers (4) or installations with high-temperature processes, which comprises a fixed housing (2), located in a hole perpendicular to the wall (3), which communicates the exterior and the interior of said combustion chamber (4), a mobile casing (5), arranged coaxially inside the fixed casing (2), the pyrometric probe being fixed (1) inside said mobile housing (5) and an actuator (6) for linear displacement of the mobile housing (5) configured to move the pyrometric probe (1) in such a way that the tip (1a) of said pyrometric probe (1) remains in a selected position between the inside of the wall (3) of the combustion chamber (4) and the inside of the combustion chamber (1). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2784954A1
    申请号:ES201930286
    申请日:2019-03-28
    公开日:2020-10-02
    发明作者:Sanz Xavier Mas
    申请人:Sanz Xavier Mas；
    IPC主号:
    专利说明:

    [0002] PYROMETRIC PROBE PROTECTION DEVICE
    [0004] Object of the invention
    [0006] The present invention refers to a mobile protection device for a pyrometric probe, configured to measure temperatures, which aims to preserve the state of the probe when it is located inside the combustion chamber or subjected to high temperature processes.
    [0008] The invention is applicable for measuring the temperatures of any system that requires knowing its operating temperature, such as any combustion or heating system, being more specifically applied to high-temperature processes.
    [0010] Background of the invention
    [0012] In the state of the art, the use of measuring instruments is known to test or measure the operating temperature of combustion chambers or in high temperature processes. These instruments, like probes, are usually installed inside the combustion chamber permanently, which determines that in combustion processes, with the generation of slag, fumes, etc., not only life is shortened useful of these temperature probes, but they end up being the main reasons for poor temperature readings, which represents a high risk for the correct operation of these cameras and high-temperature processes.
    [0014] Therefore, it is necessary to carry out periodic maintenance of the instruments, and change them when they are damaged or dirty, which requires, of course, to subject the installation to technical shutdowns by specialized personnel who also replace the damaged instruments, to which add the additional costs that this periodic maintenance implies, which constitutes a great inconvenience.
    [0016] Currently, there is no mechanism on the market to preserve the operation of the measuring instrument or probe so that the probe is not affected by the operation of the combustion chamber when the temperature measurement is in progress.
    [0018] Description of the invention
    [0020] The invention defines a device that solves these problems, developing a temperature measurement instrument, a pyrometric probe type, configured to measure the temperature of a combustion chamber or in any other high-temperature process, without the need to be exposed inside. , and a probe displacement mechanism that allows the tip of said probe to be moved from the interior to the exterior of said combustion chamber, providing an accurate reading of the temperature during use.
    [0022] To achieve the objectives and solve the aforementioned problems, the protection device of the pyrometric probe type temperature measurement instrument for combustion chambers or for other high-temperature industrial processes of the invention, comprises a fixed housing located in a through hole that it passes through a wall of the combustion chamber.
    [0024] The wall of the combustion chamber comprises the entire envelope, cover or structure that surrounds said chamber or space where the combustion or any process at high temperatures is carried out, said wall being an element duly configured to carry out said processes inside.
    [0026] The fixed housing is made of a rigid material resistant to high temperature variations as well as high mechanical and structural demands, such as reinforced steel.
    [0028] In addition to the fixed housing, the device also comprises a movable housing arranged coaxially inside the fixed housing. In other words, both the mobile and the fixed casing have regular continuous sections that each comprise a longitudinal axis, the mobile casing being mounted inside the fixed one, sharing the same longitudinal axis.
    [0030] The pyrometric probe is fixed inside the mobile housing, where a tip of said pyrometric probe protrudes from a distal end of said mobile housing, that is, that the tip of the pyrometric probe protrudes from the outside of the mobile housing while the rest of the pyrometric probe is inside.
    [0032] The device also comprises an actuator configured to linearly move the movable casing with respect to the fixed casing, in a telescopic manner. In this way, said actuator produces a longitudinal displacement of the mobile housing with the pyrometric probe inside, in such a way that it can place the tip of said pyrometric probe between two extreme positions:
    [0033] - an unexposed position, in which the tip of the pyrometric probe is inside the wall of the combustion chamber; Y
    [0034] - an exposed position, in which said tip protrudes from the wall and is inside the combustion chamber.
    [0036] In this way, the probe is configured to measure the temperature inside the combustion chamber when the tip of the pyrometric probe is inside it and, to measure the temperature when it is not exposed to the inside of said combustion chamber, being inside the wall.
    [0038] By means of this temperature measurement of the probe, when the tip is in the unexposed part, it is also possible to know the temperature inside the chamber by means of a comparative algorithm between temperatures.
    [0040] In other words, the temperature measurement pyrometric probe is configured to calculate the temperature in the combustion zone based on the temperature of the wall, and to correct the possible deviation that may have been calculated with the algorithm once the probe returns to expose yourself inside the camera.
    [0042] Due to this calculation and the configuration of this device as well as the elements that make it up, the probe can work almost permanently in the unexposed part of the combustion chamber, leaving the tip of the probe on the wall of the chamber. combustion.
    [0044] In one embodiment, the fixed housing is positioned perpendicular to the wall of the combustion chamber. Thus, the linear displacement of the actuator It is the minimum that can be done, since, in the event that the housing is positioned at an angle with respect to the chamber wall, the displacement and travel of the mobile housing with the probe would be greater.
    [0046] In one embodiment, the device comprises a thermal lining fixed and laterally wrapped on the mobile casing, said thermal lining being inside the fixed casing. This thermal coating moves with the moving casing and aims to reduce thermal losses from the combustion chamber through the hole in the wall and prevent the probe temperature measurement from being affected by temperatures outside the combustion chamber. .
    [0048] In one embodiment, the device comprises rolling means to improve linear displacement between the mobile casing and the fixed casing, and prevent them from being off-center. These means may comprise one or more metallic spheres between the two casings distributed longitudinally, although they may also comprise other types of bearings such as cylinders, depending on the geometric shape of the casings.
    [0050] In one embodiment, the device comprises a protective refractory material element at the distal end of the mobile housing, where the tip of the pyrometric probe is located.
    [0052] This element of refractory material is shaped like a ring, is made of rigid material and is located around the tip of the probe, being configured to break the possible deposits or accumulations of sand, slag, ashes and petrified earth that are generated in the combustion and that can cover the hole through which the probe is inserted into the chamber.
    [0054] As the refractory material element is configured to break up said possible deposits or accumulations, the following are avoided:
    [0055] - high inertia due to sand or ash deposits deposited on the measuring probe;
    [0056] - deviations in temperature measurements by covering the measurement probe with sand or ash, avoiding radiation and convection of the flame;
    [0057] - breakage or inability to remove the measuring probe, as deposits of sand on said probe can make it acquire a volumetric greater than that of the hole through which the probe is inserted, so that when trying to remove it for maintenance tasks it may break directly or make it impossible to extract.
    [0059] In one embodiment, the wall of the combustion chamber comprises a recess in the through hole, with a larger section than said through hole, said recess configured to house the tip of the pyrometric probe when it is in the position inside said wall of the combustion chamber.
    [0061] The exact purpose of this emptying is not to leave the probe exposed to the effects of radiation and convection that are generated in the combustion chamber, in addition to making it difficult to build up deposits or accumulations at the end of the hole due to its larger section.
    [0063] In one embodiment, the pyrometric probe is fixed inside the movable casing coaxially, that is, the pyrometric probe has a regular section whose longitudinal axis is the same as the axis of the movable casing.
    [0065] In one embodiment, the mobile casing and the fixed casing are hollow cylindrical bars, so that the section of said casings is smaller than their length. As both housings are regular elements, their assembly as well as the displacement of the mobile housing with respect to the fixed one is easier.
    [0067] In one embodiment, the linear displacement actuator, which can be pneumatic, hydraulic or electrical, comprises an arm connected to the mobile housing, in such a way that the actuator is configured to open and close telescopically, moving, through this opening or closing, the arm, the mobile housing and therefore the pyrometric probe between the two positions mentioned above.
    [0069] The invention also includes the use of the protection device of the pyrometric temperature measurement probe for combustion chambers in previously defined high temperature industrial processes.
    [0071] Said use comprises the following stages:
    [0072] to. storing in a database different temperature values inside the wall of a combustion chamber, associated with different temperature values inside said combustion chamber;
    [0073] b. measure with the tip of the pyrometric probe the temperature inside the wall of the combustion chamber, said tip being inside said wall;
    [0074] c. calculate the temperature inside the combustion chamber by comparing it with the temperature inside the wall;
    [0075] d. moving the mobile casing longitudinally with respect to the fixed casing, inserting the tip of the pyrometric probe inside the combustion chamber, protruding from the wall;
    [0076] and. measure with the tip of the pyrometric probe the temperature inside the combustion chamber, said tip being inside said combustion chamber; and f. moving the mobile casing longitudinally with respect to the fixed casing, pulling the tip of the pyrometric probe into the wall of the combustion chamber; where stage "c" is after stage "b", the rest of the previous stages having any order.
    [0078] The stage of storing data is carried out whenever the probe moves its tip between the inside and outside of the combustion chamber, so that a temperature inside the combustion chamber corresponds to each temperature of the wall.
    [0080] The step of calculating the temperature inside the combustion chamber by comparing it with the temperature inside the wall, is carried out by means of a comparative calculation that includes a series of factors such as the operating time of the combustion chamber, the fuel used. , the possibility of accumulation of slag, etc.
    [0082] In one embodiment, stage "d" of the use of the device, of moving the mobile casing by inserting the tip inside the combustion chamber, can occur when the value obtained in the temperature measurement does not match the one expected from the interior from the combustion chamber (4).
    [0084] This unexpected measurement consists of an abnormal temperature value depending on the operating time of the boiler, the fuel used, and the rest of the parameters that may affect the operation of the combustion chamber, which may be due to the incrustation of slag, ash or the like on the probe.
    [0086] This is one of the greatest advantages of this development, in addition to the increase in the useful life of the probe due to the constant and direct non-exposure to the interior of the combustion chamber, since the probe is configured to be exposed to the interior of said chamber. When the calculation carried out detects that there is an anomaly that may affect the safety or measurement in process.
    [0088] In this way, in the event that the temperature measurement of the wall or the calculation of the interior of the boiler does not conform to what was expected, the possible calculated deviation is eliminated or reduced, exposing the probe tip to direct measurement inside the chamber.
    [0090] In one embodiment, in stage "d" of the use of the device, the refractory material element located at the distal end of the mobile housing, where the tip of the pyrometric probe is located, decomposes the possible accumulations of sand, slag, ash and petrified earth that have been created, due to combustion, at the end of the hole with the chamber. In this way, when moving the mobile casing, said refractory material, fixedly attached to its end, collides with the accumulations of slag, decomposing them.
    [0092] In one use, the probe tip is only placed inside the combustion chamber, in an exposed position, when an anomaly situation is detected or to break up possible deposits of sand or petrified ash that form in many types of combustion chambers.
    [0094] In this way, the pyrometric probe is only in the combustion chamber when an exact temperature measurement is required, which considerably increases the useful life of the probe at the same time that it allows to considerably distance the periodic maintenance of the same.
    [0096] The described configuration of the device and the procedure allows solving all the problems mentioned above since:
    [0097] - Allows the increase of the useful life of the measurement probe, being configured to any type of combustion chamber with any process and with any type of measuring element.
    [0098] - The device allows by means of a comparative calculation to be more and more efficient with the collection of data, being able to reduce its exposures to the maximum, giving it the maximum useful life and in turn reducing the cost of the measurement elements because materials that accept conditions are not necessary so extreme. This point is what allows the device to differentiate itself economically from those present on the market.
    [0099] - Furthermore, the mobile part of the device is capable of being extracted so that maintenance and analysis tasks can be carried out without changing the state to which it has precipitated, after the period of operation to which it has been subjected.
    [0101] Description of the figures
    [0103] To complete the description and in order to help a better understanding of the characteristics of the invention, this specification is accompanied, as an integral part thereof, by a set of figures in which, with an illustrative and non-limiting nature, it has been represented the next:
    [0105] Figure 1 shows a cut and interrupted elevation view, in which the protection device of the pyrometric probe for combustion chambers can be seen, in the position in which the tip of said probe is inside the chamber. combustion, in an exposed position, directly measuring the temperature of the chamber, that is, with the tip protruding from the wall.
    [0107] Figure 2 shows an elevation view, cut and interrupted, in which the protection device of the pyrometric probe for combustion chambers can be seen, in the position where the tip of said probe is inside the wall of the combustion chamber , in a hole casting, measuring the temperature in said casting.
    [0109] Preferred embodiment of the invention
    [0111] As can be seen in Figures 1 and 2, in a preferred embodiment, the protection device of a pyrometric probe (1) for combustion chambers (4) comprises a fixed housing (2) shaped like a cylindrical and hollow bar, which perpendicularly crosses the wall (3) of said combustion chamber (4).
    [0113] Said fixed casing (2) is made of a metallic material resistant to temperature variations and the mechanical demands to which it is subjected, and is fitted in a perpendicular through hole in the wall (3) of the combustion chamber ( 4), where said hole communicates the outside with the inside of said chamber (4).
    [0115] As shown in both images, the fixed casing (2) does not contact the interior of the combustion chamber (4) comprising the entire longitudinal extension of the hole, but part of its extension protrudes through the wall (3), so that it has one end on the outside of said wall (3), while the opposite end is fixed in an intermediate part of said wall (3).
    [0117] The device also comprises a mobile casing (5), shaped like a cylindrical bar and with a smaller section than the fixed casing (2), wrapped and fixed said mobile casing (5) with a thermal coating (7), and located inside of the fixed housing (2).
    [0119] This mobile casing (5) also comprises two ends. A first end located on the outside of the wall (3) away from the combustion chamber (4) and a second end in an intermediate part of the interior of the wall (3) of said chamber (4).
    [0121] Inside the mobile housing (5) the pyrometric probe (1) is fixed, which also comprises a bar shape, arranged concentrically with the mobile housing (5).
    [0123] The tip (1a) of said pyrometric probe (1) protrudes from the second end of the mobile housing (5), said second end being the one that is closest to the combustion chamber (4), and is laterally covered with a Refractory material (9), shaped like a ring that protects the probe (1) from the high temperatures of the chamber (4), allows a better reading of the temperature by the probe and is capable of breaking down slag incrustations, ash and sand that can form at the end of the hole, when the mobile casing (5) moves.
    [0124] This refractory material (9) and the thermal lining (7) allow measurements of the temperature of the combustion chamber (4) to be carried out in such a way as to preserve the probe (1) from the severe conditions inside said chamber (4), without losing airtightness and without the measurement of the probe (1) being affected by the temperature outside the combustion chamber (4).
    [0126] The device also comprises an actuator (6) configured to move the mobile housing (5) linearly with respect to the fixed housing (2) and therefore, to move the pyrometric probe (1) with respect to the wall (3) of the chamber. combustion (4). In this way, the tip (1a) of said pyrometric probe (1) can be positioned between an intermediate part of the interior of the wall (3) of the combustion chamber (4), as shown in figure 2, and the inside the combustion chamber (1), protruding from the inside of the wall (3), as shown in figure 1.
    [0128] This linear displacement actuator (6) is a pneumatic cylinder whose longitudinal axis is oriented in the same direction as the longitudinal axis of the casings (2 and 5), and comprises a metal arm (11) fixed to the first end of the mobile casing ( 5) and to a moving part of said pneumatic cylinder. In this way, the cylinder is configured to elongate, linearly moving the mobile casing (5) towards the outside of the wall (3) of the combustion chamber (4), leaving the tip (1a) of said pyrometric probe (1) in an intermediate part of said wall (3), and to contract by positioning the tip (1a) inside the combustion chamber (4).
    [0130] So that the displacement of the mobile casing (5) with respect to the fixed one (2) is uniform and there are no offsets that could damage the pyrometric probe (1) or affect its reading, the device comprises rolling means (8) between the mobile casing (5) and the fixed casing (2). These rolling means (8) consist of metal spheres located in intermediate parts of said housings (2 and 5), always maintaining contact, only through one point of said spheres and the housings, which facilitates sliding between both housings (2 and 5).
    [0132] The wall (3) of the combustion chamber (4) comprises a recess (10) in the through hole, with a larger section than said hole, said recess configured to house the tip (1a) of the pyrometric probe (1) when is positioned in an intermediate part inside the wall (3) of the combustion chamber (4). In this way, when a temperature measurement is required in the combustion chamber (4) from the temperature of the wall (3), the tip (1a) of the probe (1) is housed in said recess or void (10), and when a temperature measurement is carried out directly in the combustion chamber (4), the tip (1a) moves into said chamber (4) by means of the actuator (6).
    [0134] In the exemplary embodiment, the combustion chamber (4) is from an industrial boiler, although it could be implemented in any heating combustion chamber (4) or any installation in which high-temperature industrial processes are carried out to carry out the combustion.
    [0136] The invention also includes the use of the protection device for the pyrometric probe (1), where said use comprises a series of steps.
    [0138] Said stages comprise the movements of the mobile casing (5) with respect to the fixed one (2), both for the introduction and the extraction of the tip (1a) of the probe (1) in the combustion chamber (4). These movements are always longitudinal, that is, the mobile casing (5) moves along the fixed one (2).
    [0140] Each time a displacement occurs, the probe (1) measures the temperature values of the combustion chamber (4) and the wall (3), storing said values in a comparative way, so that, when the tip (1a ) of the probe located on the wall (3) of the chamber (4) is capable of knowing the temperature inside the chamber (4) due to this storage of values, performing a comparative calculation.
    [0142] The use of this device also allows that, in the event that ashes or slag accumulate in the cavity (10) where the tip (1a) of the probe is located, the step of moving the probe (1) occurs, so that the refractory material (9) breaks these concentrations and allows an accurate reading of the interior of the boiler (4).
    权利要求:
    Claims (12)
    [1]
    1. - Protection device for a pyrometric probe (1) for measuring temperature for combustion chambers (4) characterized in that it comprises:
    - a fixed casing (2), located in a through hole that passes through a wall (3) of the combustion chamber (4);
    a movable casing (5), arranged coaxially inside the fixed casing (2), the pyrometric probe (1) being fixed inside said movable casing (5); wherein a tip (1a) of said pyrometric probe (1) protrudes from a distal end of said movable housing (5); Y
    - an actuator (6) for linear displacement of the movable casing (5) configured to displace the pyrometric probe (1) so that the tip (1a) of said pyrometric probe (1) remains in a position selected from:
    or a position in which the tip (1a) of the pyrometric probe (1) is inside the wall (3) of the combustion chamber (4) and;
    or an exposed position, in which said tip (1a) is inside the combustion chamber (4), protruding from the wall (3).
    [2]
    2. - Device according to claim 1, characterized in that the fixed casing (2) is positioned perpendicular to the wall (3) of the combustion chamber (4).
    [3]
    3. - Device according to any of the preceding claims, characterized in that it comprises a thermal lining (7) fixed and wrapped laterally on the mobile casing (5), said thermal lining (7) being inside the fixed casing (2 ).
    [4]
    4. - Device according to any of the preceding claims, characterized in that it comprises rolling means (8) between the mobile casing (5) and the fixed casing (2).
    [5]
    5. - Device according to any of the preceding claim, characterized in that the rolling means (8) comprise at least one metallic sphere.
    [6]
    6. - Device according to any of the preceding claims, characterized in that it comprises an element of refractory material (9) at the distal end of the mobile casing (5), surrounding the tip (1a) of the pyrometric probe (1).
    [7]
    7. - Device according to any of the preceding claims, characterized in that one end of the hole in the wall (3) of the combustion chamber (4) comprises a recess (10), located next to the combustion chamber (4) , configured to house the tip (1a) of the pyrometric probe (1) in the position in which it is located inside the wall (3) of the combustion chamber (4).
    [8]
    8. - Device according to any of the preceding claims, characterized in that the pyrometric probe (1) is fixed inside the mobile housing (5) coaxially.
    [9]
    9. - Device according to any of the preceding claims, characterized in that the mobile casing (5) and the fixed casing (2) are hollow cylindrical bars.
    [10]
    10. - Device according to any of the preceding claims, characterized in that the linear displacement actuator (6) is of the type selected within the group consisting of pneumatic, hydraulic and electrical, and comprises an arm (11) connected to said cylinder and to the mobile casing (5).
    [11]
    11. - Use of the protection device of a pyrometric probe (1) for measuring temperature for combustion chambers, defined in any of the preceding claims, characterized in that said use comprises the steps of:
    to. storing in a database different temperature values inside the wall (3) of a combustion chamber (4), associated with different temperature values inside said combustion chamber (4);
    b. measure with the tip (1a) of the pyrometric probe (1) the temperature inside the wall (3) of the combustion chamber (4), said tip (1a) being inside said wall (3);
    c. calculating the temperature inside the combustion chamber (4) by comparing it with the temperature inside the wall (3);
    d. moving the mobile casing (5) longitudinally with respect to the fixed casing (2), introducing the tip (1a) of the pyrometric probe (1) inside the combustion chamber (4), protruding from the wall (3);
    and. measure with the tip (1a) of the pyrometric probe (1) the temperature inside the combustion chamber (4), said tip (1a) being inside said chamber combustion (4); Y
    F. moving the mobile casing (5) longitudinally with respect to the fixed casing (2), removing the tip (1a) of the pyrometric probe (1) from the combustion chamber (4), inserting it inside the wall (3);
    where stage "c" is after stage "b", the rest of the previous stages having any order.
    [12]
    12.- Use of the protection device of a pyrometric probe (1), according to claims 6 and 11, characterized in that in step “d”, moving the mobile housing (5) by introducing the tip (1a) of the probe Pyrometric (1) in the combustion chamber (4), the element of refractory material (9) decomposes accumulations of sand, slag, ashes and petrified earth at one end of the hole with the combustion chamber (4).
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    ES8703633A1|1984-12-10|1987-02-16|Siderurgie Fse Inst Rech|Probe for the determination of the temperatures of the walls of coke oven flues|
    JPH06346789A|1993-06-10|1994-12-20|Ishikawajima Harima Heavy Ind Co Ltd|Sticking monitoring device for piston ring for reciprocating engine|
    KR20040040066A|2002-11-06|2004-05-12|현대자동차주식회사|Thermometer for detecting a combustion temperature in a diesel engine and a combustion deviation diagnostic method using the thermometer|
    JP2007063300A|2005-08-29|2007-03-15|Kansai Coke & Chem Co Ltd|Apparatus for observing combustion chamber of coke oven|
    KR20170007592A|2015-07-08|2017-01-19|주식회사 포스코|Probe apparatus and lance having the same|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201930286A|ES2784954B2|2019-03-28|2019-03-28|PYROMETRIC PROBE PROTECTION DEVICE|ES201930286A| ES2784954B2|2019-03-28|2019-03-28|PYROMETRIC PROBE PROTECTION DEVICE|
    PCT/ES2020/070173| WO2020193825A1|2019-03-28|2020-03-12|Pyrometer probe protection device|
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