CN113187898B - Sealing device for small penetrating piece on cavity and heat exchanger with sealing device - Google Patents
Sealing device for small penetrating piece on cavity and heat exchanger with sealing device Download PDFInfo
- Publication number
- CN113187898B CN113187898B CN202010037166.6A CN202010037166A CN113187898B CN 113187898 B CN113187898 B CN 113187898B CN 202010037166 A CN202010037166 A CN 202010037166A CN 113187898 B CN113187898 B CN 113187898B
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- sealing
- cavity
- heat exchange
- exchange tube
- hole
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- 238000007789 sealing Methods 0.000 title claims abstract description 150
- 230000000149 penetrating effect Effects 0.000 title abstract description 15
- 238000000605 extraction Methods 0.000 claims abstract description 47
- 239000012530 fluid Substances 0.000 claims description 71
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 230000035515 penetration Effects 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000110 cooling liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/44—Free-space packings
- F16J15/447—Labyrinth packings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a sealing device for a tiny penetrating piece on a cavity and a heat exchanger with the sealing device, wherein a leading-out hole is formed on the cavity, and the sealing device comprises: cartridge and seal. The clamping seat is fixed on the outer side of the cavity, and is in sealing connection with the outer wall of the cavity, and a sealing cavity is formed in the clamping seat; the sealing piece is arranged in the sealing cavity, an extraction channel is defined in the sealing piece, the extraction channel is a labyrinth extraction channel, an inlet of the extraction channel is opposite to and communicated with the extraction hole, and one end of the sealing piece facing the extraction hole is in sealing connection with the clamping seat and/or the periphery of the extraction hole. According to the sealing device for the small penetrating piece on the cavity, the leading-out hole of the cavity can be well sealed, meanwhile, the inner structure of the sealing device can ensure that the sealing device has good sealing performance, and further, leakage of a medium can not occur when the penetrating piece is led out of the cavity.
Description
Technical Field
The invention relates to the technical field of reactor thermal hydraulic power, in particular to a sealing device for a small penetrating piece on a cavity and a heat exchanger with the sealing device.
Background
In the related art, it is pointed out that the temperature measurement of the fluid in the heat exchanger or other fluid pipelines is generally carried out by arranging a temperature measurement device at an inlet and an outlet of the heat exchange pipe or at individual points in the pipe, the measured data are difficult to reflect the overall temperature distribution condition in the pipe, and meanwhile, the sealing device of the through holes on the pipe wall of the common pipeline is difficult to be applied to the pipeline in the high-temperature and high-pressure environment in the pipe.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. The invention is based on the object of providing a sealing device for small through-holes in a cavity, which sealing device can seal an outlet opening in the cavity wall when a through-hole is present through the cavity wall.
The invention also provides a heat exchanger with the sealing device.
According to a first aspect of the present invention, a sealing device for a small penetration on a cavity, the cavity having a lead-out hole formed therein, the sealing device comprising: the clamping seat is fixed on the outer side of the cavity and is in sealing connection with the outer wall of the cavity, and a sealing cavity is formed in the clamping seat; the sealing piece is arranged in the sealing cavity, an extraction channel is defined in the sealing piece, the extraction channel is a labyrinth extraction channel, an inlet of the extraction channel is opposite to and communicated with the extraction hole, and one end of the sealing piece, which faces the extraction hole, is in sealing connection with the clamping seat and/or the periphery of the extraction hole.
According to the sealing device for the small penetrating piece on the cavity, the clamping seat is welded with the outer wall of the cavity, and the labyrinth type leading-out channel is arranged in the sealing piece, so that when the leading-out hole is formed in the cavity and the penetrating piece passes through the leading-out hole and is led out through the labyrinth type leading-out channel in the sealing piece, the sealing device can well seal the leading-out hole of the cavity, meanwhile, the inner structure of the sealing device can ensure that the sealing device has good sealing performance, and further, leakage of a medium can not occur when the penetrating piece is led out from the cavity.
According to some embodiments of the invention, the seal is a graphite piece.
According to some embodiments of the invention, the cross-sectional dimension of the sealing cavity increases gradually in a direction from the exit hole along the axis of the exit hole towards the exit hole, the seal fitting the shape of the sealing cavity.
Further, the sealing member is adhered and hermetically connected with the peripheral wall of the sealing cavity.
In some embodiments, the opening dimension of the end of the sealed cavity facing the extraction aperture is substantially equal to the outlet cross-sectional dimension of the extraction aperture.
According to some embodiments of the invention, the sealing device further comprises: the clamping ring is arranged in the sealing cavity and is positioned on one side, deviating from the leading-out hole, of the sealing element, the clamping ring is configured to be suitable for pressing the sealing element towards the direction of the leading-out hole, and a first through hole which is opposite to and communicated with the outlet of the leading-out channel is formed in the clamping ring.
Further, the sealing device further includes: the fastener is arranged on one side, deviating from the sealing piece, of the pressing ring, the fastener is abutted with the pressing ring to apply pressure to the pressing ring, and a second through hole opposite to and communicated with the first through hole is formed in the fastener.
Further, the fastener is in threaded connection with the peripheral wall of the seal cavity.
The heat exchanger according to the second aspect of the present invention includes: the heat exchange pipes are arranged in parallel; the temperature measuring device is arranged in at least one heat exchange tube and is used for measuring the temperature of fluid in the heat exchange tube, and the temperature measuring device comprises: the thermocouples extend into the heat exchange tube from one end of the heat exchange tube and extend along the length direction of the heat exchange tube, the end part of the free end of each thermocouple is formed into a temperature measuring end, the temperature measuring ends of the thermocouples are arranged at intervals in the length direction of the heat exchange tube, and each thermocouple is provided with an outgoing line; a first flange and a second flange, wherein the first flange is provided with a first fluid cavity, one ends of a plurality of heat exchange tubes are connected with the first flange and communicated with the first fluid cavity, the second flange is provided with a second fluid cavity, the other ends of the plurality of heat exchange tubes are connected with the second flange and communicated with the second fluid cavity, and a leading-out hole for leading out the lead-out wire is formed in the peripheral wall of at least one of the first fluid cavity and the second fluid cavity; according to a first aspect of the invention, a sealing device for a small penetration piece on a cavity is provided on the first flange and/or the second flange for sealing the outlet opening.
In one embodiment of the invention, the thermocouple is a sheathed thermocouple.
According to some embodiments of the invention, the maximum radial dimension of the portion of the thermocouple protruding into the heat exchange tube is no greater than 1mm.
According to some embodiments of the invention, the temperature detecting device further comprises: the support rod stretches into the heat exchange tube from one end of the heat exchange tube and extends along the length direction of the heat exchange tube, a plurality of thermocouples are all fixed on the support rod, and the temperature measuring ends of the thermocouples are spaced apart from the support rod and the inner peripheral wall of the heat exchange tube.
Further, the support rod is a steel rod, and the maximum radial dimension of the support rod is not more than 4mm.
According to some embodiments of the invention, an external thermocouple for measuring the temperature of fluid outside the heat exchange tube is arranged on the peripheral wall of the heat exchange tube.
According to the heat exchanger of the second aspect of the invention, the sealing device for the small penetrating piece on the cavity of the first aspect is arranged, so that the temperature measuring device is used for measuring the temperature in the heat exchange tube of the heat exchanger, the leakage of medium in the tube is not caused, and the temperature measuring work is not affected.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic view of a heat exchanger according to an embodiment of a second aspect of the invention;
fig. 2 is a schematic view of the sealing device shown in fig. 1.
Reference numerals:
Heat exchanger 100:
The heat exchange tube 1, an inlet end 11, an outlet end 12,
The first flange 2, the first fluid chamber 21,
The second flange 3, the second fluid chamber 31,
Sealing means 4, cartridge 41, connection hole 411, seal chamber 412, first seal chamber section 4121, second seal chamber section 4122, seal member 42, lead-out passage 421, pressure ring 43, first through hole 431, fastener 44, second through hole 441,
The support rod 5, thermocouple 6, outside pipe thermocouple 7.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
First, a heat exchanger 100 according to an embodiment of the second aspect of the present invention will be briefly described with reference to fig. 1 and 2.
As shown in fig. 1, the heat exchanger 100 according to the second aspect of the present invention includes: a plurality of heat exchange tubes 1, a temperature measuring device, a first flange 2, a second flange 3 and a sealing device 4 for a fine penetration on a cavity according to the first aspect of the present invention.
Specifically, one end of the plurality of heat exchange tubes 1 may be connected with the first flange 2 in a sealing manner, and the other end of the plurality of heat exchange tubes 1 may be connected with the second flange 3 in a sealing manner; the first flange 2 has a first fluid chamber 21, the second flange 3 has a second fluid chamber 31, and fine lead-out holes can be formed in both the first fluid chamber 21 and the second fluid chamber 31; the temperature measuring device comprises a plurality of thermocouples 6, wherein the thermocouples 6 are provided with temperature measuring ends and outgoing lines, the temperature measuring ends of the thermocouples 6 can extend into the heat exchange tube 1, and the outgoing lines of the thermocouples 6 are suitable for being led out from the outgoing holes in the first fluid cavity 21 and the second fluid cavity 31.
A sealing device 4 for a small penetration on a cavity according to an embodiment of the first aspect of the present invention is described below with reference to fig. 1 and 2.
As shown in fig. 2, the sealing device 4 according to the first aspect of the present invention can be used to seal the lead-out hole when the lead-out wire of the thermocouple 6 is led out from the lead-out hole on the cavities (the first fluid cavity 21 and the second fluid cavity 31 as described above), preventing the medium in the cavity from leaking out from the lead-out hole. The sealing device 4 may include: a cartridge 41 and a seal 42.
Specifically, the clamping seat 41 may be fixed on the outer side of the cavity, and the clamping seat 41 may be connected with the outer wall of the cavity in a sealing manner, for example, the clamping seat 41 may be welded with the outer wall of the cavity, and a sealing cavity 412 is formed in the clamping seat 41; the sealing member 42 may be disposed in the sealing chamber 412, the interior of the sealing member 42 may define an extraction channel 421, the extraction channel 421 is a labyrinth extraction channel 421, and an inlet of the extraction channel 421 may be opposite to and communicate with an extraction hole on the chamber, so that the penetrating member may conveniently enter the extraction channel 421 from the extraction hole, and an end of the sealing member 42 (an upper end of the sealing member as shown in fig. 2) facing the extraction hole is in sealing connection with the clamping seat 41 and/or a periphery of the extraction hole. Therefore, in this embodiment, the clamping seat 41 is connected with the cavity in a sealing manner, and the labyrinth type extraction channel 421 is provided in the sealing member 42, so that the penetrating member can conveniently pass through the extraction hole and the extraction channel 421, and meanwhile, the leakage of the medium in the cavity can be effectively reduced.
For example, as shown in fig. 2, the labyrinth type extraction channel 421 is formed in the seal member 42, where the extraction channel 421 includes a channel inlet, a channel outlet and an intermediate channel, and the intermediate channel is formed as a multiple tortuous channel, that is, after the extraction line enters the extraction channel 421 from the channel inlet, the path of the extraction line is not a straight line but a labyrinth type curve tortuous back and forth in the process of passing through the intermediate channel to reach the channel outlet, so that in the process of extracting the extraction line through the extraction channel 421, the leakage of the medium in the cavity along with the extraction line, especially when the environment of high temperature and high pressure is present in the cavity, the labyrinth type extraction channel 421 of the seal member 42 can bear the high pressure caused by the medium in the cavity.
According to the sealing device 4 for the small penetrating piece on the cavity, the clamping seat 41 is welded with the outer wall of the cavity, and the labyrinth type leading-out channel 421 is arranged in the sealing piece 42, so that when the leading-out hole is formed in the cavity, the penetrating piece passes through the leading-out hole and is led out through the labyrinth type leading-out channel 421 in the sealing piece 42, the sealing device 4 can well seal the leading-out hole of the cavity 412, meanwhile, the inner structure of the sealing device 4 can ensure that the sealing device has good tightness, and further, the leakage of a medium can not happen when the penetrating piece is led out from the cavity.
According to some embodiments of the invention, the seal 42 is a graphite piece. The sealing element 42 made of graphite can further improve the tightness of the sealing device 4 and prevent the medium in the cavity from leaking because of good high temperature resistance, thermal expansion coefficient and lower permeability of graphite.
According to some embodiments of the invention, as shown in fig. 2, the cross-sectional dimension of the seal cavity 412 increases gradually in a direction away from the exit hole along the axis of the exit hole, the seal 42 conforming to the shape of the seal cavity 412. For example, as shown in fig. 2, the seal chamber 412 may include a first seal chamber section 4121 and a second seal chamber section 4122, the first seal chamber section 4121 may be formed in a truncated cone shape, and a cross-sectional size component of the first seal chamber section 4121 increases in a top-down direction, and an outer shape of the seal member 42 is adapted to the shape of the first seal chamber section 4121, whereby a contact area of the seal member 42 and the first seal chamber section 4121 may be increased, so that a sealing effect is better.
Further, the seal member 42 is bonded and sealingly connected to the peripheral wall of the seal chamber 412. This can further improve the sealability of the sealing device 4.
In some embodiments, the opening of the sealed cavity 412 toward the end of the exit aperture (i.e., the connection aperture 411 described above) is substantially equal in size to the exit cross-sectional dimension of the exit aperture. That is, the cross-sectional dimension of the connection hole 411 of the sealing cavity 412 may be equal to or slightly larger than the outlet cross-sectional dimension of the lead-out hole, so that the lead-out wire of the thermocouple 6 is smoothly led out of the lead-out hole and then smoothly enters the sealing cavity 412 from the connection hole 411.
According to some embodiments of the invention, as shown in fig. 2, the sealing device 4 further comprises: a pressure ring 43. Specifically, the pressure ring 43 is disposed in the sealing cavity 412, the pressure ring 43 is located on a side of the sealing member 42 away from the lead-out hole (for example, on a lower side of the sealing member 42 shown in fig. 2), the pressure ring 43 may be configured to press the sealing member 42 toward the direction of the lead-out hole, the pressure ring 43 is formed with a first through hole 431, and the first through hole 431 may be opposite to and in communication with the outlet of the lead-out channel 421, so that the lead-out wire of the thermocouple 6 is led out through the first through hole 431, and at the same time, the pressure ring 43 of the present embodiment may further seal the lead-out hole of the cavity. For example, as shown in fig. 2, the pressure ring 43 may be formed in a columnar shape, the outer side wall of the pressure ring 43 may be fitted with a smooth surface of an upper side portion of the inner side wall of the second seal chamber section 4122, the outer side wall of the pressure ring 43 may be interference fit with the inner side wall of the second seal chamber section 4122, and further, the outer side wall of the pressure ring 43 may be bonded with the inner side wall of the second seal chamber section 4122.
Further, as shown in fig. 2, the sealing device 4 further includes: and a fastener 44. Specifically, the fastener 44 is disposed on a side of the pressure ring 43 facing away from the seal member 42 (e.g., a lower side of the pressure ring 43 shown in fig. 2), the fastener 44 abuts against the pressure ring 43 to apply pressure to the pressure ring 43, and the fastener 44 is provided with a second through hole 441, which may be opposite to and communicate with the first through hole 431. Thus, the fastener 44 in this embodiment can not only compress the compression ring 43, but also facilitate the lead-out wire of the thermocouple 6 to be led out through the fastener 44, and at the same time, the fastener 44 can further improve the tightness of the sealing device 4.
Further, the fastener 44 is threadedly coupled to the peripheral wall of the seal chamber 412. For example, as shown in fig. 2, the lower side portion of the inner wall of the second seal housing section 4122 may be formed with threads, and the fastener 44 may be screw-engaged with the lower side portion of the second seal housing section 4122, so that the connection stability of the fastener 44 with the seal housing 412 may be improved while the sealing shape of the sealing device 4 is improved.
For example, as shown in fig. 1 and fig. 2, the first fluid chamber 21 and the second fluid chamber 31 are respectively connected to two ends of the heat exchange tube 1, wherein the first fluid chamber 21 is connected to the inlet ends 11 of the plurality of heat exchange tubes 1, the second fluid chamber 31 can be connected to the outlet ends 12 of the plurality of heat exchange tubes 1, and the first fluid chamber 21 and the second fluid chamber 31 are provided with lead-out holes, wherein the aperture of the lead-out holes can reach millimeter level, and the aperture can only accommodate lead-out wires of thermocouples 6 with diameters of 1mm-4mm to pass through; the upper end of the clamping seat 41 can be further provided with a connecting hole 411, the aperture of the connecting hole 411 can be the same as the aperture of the leading-out hole, and the aperture of the connecting hole 411 can be slightly larger than the aperture of the leading-out hole, so that the clamping seat 41 and a cavity body are favorably connected to form a channel, and leakage of a medium from the leading-out hole is also favorably prevented.
Further, the inside of the cartridge 41 may be formed with a seal chamber 412, the seal chamber 412 may include a first seal chamber section 4121 and a second seal chamber section 4122, wherein the first seal chamber section 4121 may be formed in a truncated cone shape, the first seal chamber section 4121 gradually increases in size in a top-down direction, the second seal chamber section 4122 may be formed in a cylindrical shape, a top of the first seal chamber section 4121 is a connection hole 411 (the connection hole 411 described above), a bottom of the first seal chamber section 4121 may communicate with a top of the second seal chamber section 4122, an upper side portion of an inner wall of the second seal chamber section 4122 may be formed in a smooth surface, and a lower side portion surface of the inner wall of the second seal chamber section 4122 may be formed with threads; the shape of the sealing element 42 can be matched with the shape of the first sealing cavity section 4121, the outer side wall of the sealing element 42 can be in extrusion contact with the inner side wall of the first sealing cavity section 4121, the leading-out channel 421 can be defined in the sealing element 42, the leading-out channel 421 can be a labyrinth leading-out channel 421, the leading-out channel 421 can comprise an inlet end and an outlet end, the inlet end of the leading-out channel 421 is formed at the top of the sealing element 42, and the size of the inlet end of the leading-out channel 421 can be the same as the size of the connecting hole 411, therefore, the lead-out wire of the thermocouple 6 can be smoothly led out from the leading-out hole of the cavity and sequentially penetrates through the clamping seat 41 and the sealing element 42, and meanwhile, the sealing connection of the sealing element 42 and the clamping seat 41 and the cavity can avoid medium leakage in the cavity.
In summary, according to the sealing device 4 of the embodiment of the first aspect of the present invention, through the three-stage sealing design of the sealing member 42, the compression ring 43 and the fastening member 44, the lead-out wire of the thermocouple 6 can be led out conveniently, the sealing performance of the lead-out wire when led out from the lead-out hole can be improved, and meanwhile, the sealing device 4 can have a wider application range, especially the applicability of the sealing device 4 when the medium in the cavity is in the environment of high temperature and high pressure 43.
The heat exchanger 100 according to the second aspect of the present invention includes: a plurality of heat exchange tubes 1, a temperature measuring device, a first flange 2 and a second flange 3, and a sealing device 4 according to the first aspect of the present invention.
Specifically, as shown in fig. 1, for example, a plurality of heat exchange tubes 1 may be arranged in parallel, so that the heat exchange area of the heat exchanger 100 may be increased by increasing the number of the heat exchange tubes 1, thereby improving the heat exchange efficiency of the heat exchanger 100; at least one heat exchange tube 1 is internally provided with a temperature measuring device which can be used for measuring the temperature of fluid in the heat exchange tube 1 and can comprise: the plurality of thermocouples 6, the plurality of thermocouples 6 extend into the heat exchange tube 1 from one end of the heat exchange tube 1 (for example, the inlet end 11 of the heat exchange tube 1 shown in fig. 1), the plurality of thermocouples 6 may extend along the length direction of the heat exchange tube 1, the end of the free end of each thermocouple 6 is formed into a temperature measuring end, and the temperature measuring ends of the plurality of thermocouples 6 are arranged at intervals in the length direction of the heat exchange tube 1, each thermocouple 6 has an outgoing line, and the outgoing line of each thermocouple 6 may be led out from the inlet end 11 of the heat exchange tube 1.
The first flange 2 has a first fluid chamber 21, one end of the plurality of heat exchange tubes 1 (for example, an inlet end 11 of the heat exchange tube 1 shown in fig. 1) is connected to the first flange 2, the inlet ends 11 of the plurality of heat exchange tubes 1 may be communicated to the first fluid chamber 21 through the first flange 2, the second flange 3 has a second fluid chamber 31, the other end of the plurality of heat exchange tubes 1 (for example, an outlet end 12 of the heat exchange tube 1 shown in fig. 1) is connected to the second flange 3, and the outlet ends 12 of the plurality of heat exchange tubes 1 may be communicated to the second fluid chamber 31 through the second flange 3, so that lead wires of the thermocouples 6 may be led out from the first fluid chamber 21 or a peripheral wall of the second fluid chamber 31.
Further, a lead-out hole is provided in a peripheral wall of at least one of the first fluid chamber 21 and the second fluid chamber 31, and the lead-out hole may be used for leading out the lead-out wire. In other words, the peripheral wall of the first fluid chamber 21 may be provided with a lead-out hole, and both the peripheral wall of the first fluid chamber 21 and the peripheral wall of the second fluid chamber 31 may be provided with lead-out holes, so that the lead-out wire of the thermocouple 6 is led out from the lead-out hole, thereby feeding back the distribution condition of the temperature field of the fluid in the heat exchange tube 1.
According to the sealing device 4 for small penetrations in cavities of the first aspect of the invention, the sealing device 4 is provided on the first flange 2 and/or the second flange 3 for sealing the lead-out holes. That is, the sealing device 4 may be disposed only on the first flange 2, or the sealing device 4 may be disposed only on the second flange 3, preferably, the sealing devices 4 are disposed on both the first flange 2 and the second flange 3, so that the thermocouples 6 are conveniently disposed into the heat exchange tube 1 from the inlet end 11 and the outlet end 12 of the heat exchange tube 1, respectively, and uniformly distributed in the whole heat exchange tube 1, thereby avoiding that the thermocouples 6 cannot be uniformly disposed in the tube due to the special shape of the heat exchange tube 1 when the thermocouples 6 are disposed into the heat exchange tube 1 from only one end of the heat exchange tube 1.
For example, as shown in fig. 1, since the heat exchange tube 1 is formed in a C-shape, the heat exchange tube 1 comprises an upper horizontal tube section, a vertical tube section, and a lower horizontal tube section, the first flange 2 is connected to the upper horizontal tube section, the second horizontal tube section is connected to the lower horizontal tube section, sealing devices 4 are provided on both the first flange 2 and the second flange 3, thermocouples 6 can be arranged into the heat exchange tube 1 from the first fluid chamber 21 of the first flange 2 and the second fluid chamber 31 of the second flange 3, respectively, wherein the thermocouples 6 extending from the first fluid chamber 21 can be uniformly arranged on the upper horizontal tube section and the vertical tube section, and the thermocouples 6 extending from the second fluid chamber 31 can be arranged on the lower horizontal tube section, so that the arrangement of temperature measuring points in the whole heat exchange tube 1 is more uniform, and the measured data can be more detailed and truly effective.
Furthermore, two lead-out holes may be provided on the first fluid chamber 21 and the second fluid chamber 31, and the two lead-out holes of the first fluid chamber 21 may be symmetrically arranged along the radial direction on the peripheral wall, the two lead-out holes of the second fluid chamber 31 may be symmetrically arranged along the radial direction on the peripheral wall, and accordingly, two sealing devices 4 corresponding to the lead-out holes one by one are provided outside the first fluid chamber 21 and the second fluid chamber 31, and since each thermocouple 6 is connected with one lead-out wire, in the case that a plurality of thermocouples 6 are uniformly arranged in the tube, if the lead-out wires of the plurality of thermocouples 6 are led out from only one lead-out hole, the aperture of the lead-out hole is increased, which is not beneficial to sealing, while in the embodiment, the lead-out wires led out from the first fluid chamber 21 are divided into upper and lower ends, and the lead-out wires led out from the second fluid chamber 31 are also divided into upper and lower ends, thereby reducing the lead-out holes, the labyrinth lead-out channels 421, the aperture of the first through hole 431 and the second through hole 441, and further improving the sealing effect of the sealing device 4.
In one embodiment of the invention, thermocouple 6 is a sheathed thermocouple. Specifically, the armored thermocouples may include an armored portion and a signal transmission line, wherein the temperature measuring ends of the thermocouples 6 are all formed at the end of the armored portion, and since the high-temperature and high-pressure fluid exists in the heat exchange tube 1, the portions of the thermocouples 6 extending into the heat exchange tube 1 are all armored portions of the thermocouples 6, and the positions of the temperature measuring ends of the thermocouples 6 in the tube can be adjusted by controlling the length of the armored portion of each thermocouple 6 extending into the heat exchange tube 1, so that the temperature measuring points are uniformly arranged in the heat exchange tube 1; the signal transmission line of the thermocouple 6 can be arranged outside the pipe, and is led out through the leading-out hole by the armor part and electrically connected with the signal transmission line, so that the thermocouple 6 is conveniently arranged, and the influence or damage on the performance of the signal transmission line of the thermocouple 6 caused by the high-temperature high-pressure 43 environment in the pipe can be prevented.
According to some embodiments of the present invention, the maximum radial dimension of the portion of the thermocouple 6 protruding into the heat exchange tube 1 is not greater than 1mm. In this way, the influence of the parts of the thermocouples 6 extending into the heat exchange tube 1 on the flow path of the fluid in the tube can be reduced as much as possible, and the sealing is facilitated when the lead wires are led out.
According to some embodiments of the invention, the temperature detecting device may further include: and a support bar 5. Specifically, the support rod 5 extends into the heat exchange tube 1 from one end of the heat exchange tube 1 (such as the heat exchange tube 1 shown in fig. 1), the support rod 5 may extend along the length direction of the heat exchange tube 1, the thermocouples 6 are all fixed on the support rod 5, and the temperature measuring ends of the thermocouples 6 are spaced apart from the support rod 5 and the inner peripheral wall of the heat exchange tube 1, thereby, on one hand, the support rod 5 may guide the thermocouples 6 to extend into the tube and uniformly distribute at different positions in the tube, and on the other hand, the temperature measuring ends of the thermocouples 6 are spaced apart from the support rod 5 and the inner peripheral wall of the heat exchange tube 1, so as to prevent the temperature measuring results of the thermocouples 6 in the inner peripheral wall of the support rod 5 and the heat exchange tube 1 from being affected.
Further, the support rod 5 is a steel rod, and the maximum radial dimension of the support rod 5 is not more than 4mm. For example, the diameter of the support rod 5 may be 1mm, 1.5mm, 2mm, 3mm or 4mm, whereby the influence of the support rod 5 on the flow of the fluid in the heat exchange tube 1 can be minimized.
According to some embodiments of the present invention, an external thermocouple 7 is provided on the outer peripheral wall of the heat exchange tube 1, and the external thermocouple 7 may be used to measure the fluid temperature outside the heat exchange tube 1. When the heat exchanger 100 works, the heat exchange tube 1 of the heat exchanger 100 can be directly soaked in cooling liquid, and the thermocouple 7 outside the tube can be combined with the temperature data of the fluid in the heat exchange tube 1 measured by the thermocouple 6 in the heat exchange tube 1 by measuring the temperature data of the cooling liquid outside the heat exchange tube 1 and close to the wall of the heat exchange tube 1, so that the actual heat exchange effect of the heat exchanger 100 is detected.
According to the heat exchanger 100 of the second aspect of the present invention, by providing the sealing device 4 for the fine penetration piece on the cavity of the first aspect described above, the temperature measuring device is used to measure the temperature in the heat exchange tube 1 of the heat exchanger 100 without causing leakage of the medium in the tube, so that the temperature measuring work is not affected.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (12)
1. A sealing device for a small penetration piece on a cavity of a high-temperature high-pressure fluid pipeline, characterized in that a lead-out hole is formed on the cavity, the sealing device comprising:
The clamping seat is fixed on the outer side of the cavity and is in sealing connection with the outer wall of the cavity, and a sealing cavity is formed in the clamping seat;
The sealing piece is arranged in the sealing cavity, an extraction channel is defined in the sealing piece, the extraction channel is a labyrinth extraction channel, an inlet of the extraction channel is opposite to and communicated with the extraction hole, and one end of the sealing piece, which faces the extraction hole, is in sealing connection with the clamping seat and/or the periphery of the extraction hole;
the pressing ring is arranged in the sealing cavity and is positioned on one side, away from the leading-out hole, of the sealing piece, the pressing ring is configured to be suitable for pressing the sealing piece towards the direction of the leading-out hole, and a first through hole which is opposite to and communicated with the outlet of the leading-out channel is formed in the pressing ring;
The fastener is arranged on one side, deviating from the sealing piece, of the pressing ring, the fastener is abutted with the pressing ring to apply pressure to the pressing ring, and a second through hole opposite to and communicated with the first through hole is formed in the fastener.
2. The sealing device for a small penetration on a high temperature and high pressure fluid conduit according to claim 1, wherein the sealing member is a graphite member.
3. The sealing device for a small penetration on a high temperature and high pressure fluid conduit according to claim 1, wherein the cross-sectional dimension of the sealing cavity gradually increases in a direction from the extraction hole along the axis of the extraction hole toward away from the extraction hole, the sealing element being adapted to the shape of the sealing cavity.
4. A sealing arrangement for a small penetration in a high temperature, high pressure fluid conduit chamber according to claim 3, wherein the sealing element is bonded and sealingly connected to the peripheral wall of the sealing chamber.
5. A sealing arrangement for a small penetration in a high temperature, high pressure fluid conduit chamber according to claim 3, wherein the opening dimension of the end of the sealing chamber facing the exit orifice is substantially equal to the exit cross-sectional dimension of the exit orifice.
6. A sealing arrangement for a small penetration in a high temperature, high pressure fluid conduit according to any one of claims 1-5, wherein the fastener is threadably connected to the peripheral wall of the sealing chamber.
7. A heat exchanger, comprising:
the heat exchange pipes are arranged in parallel;
the temperature measuring device is arranged in at least one heat exchange tube and is used for measuring the temperature of fluid in the heat exchange tube, and the temperature measuring device comprises: the thermocouples extend into the heat exchange tube from one end of the heat exchange tube and extend along the length direction of the heat exchange tube, the end part of the free end of each thermocouple is formed into a temperature measuring end, the temperature measuring ends of the thermocouples are arranged at intervals in the length direction of the heat exchange tube, and each thermocouple is provided with an outgoing line;
A first flange and a second flange, wherein the first flange is provided with a first fluid cavity, one ends of a plurality of heat exchange tubes are connected with the first flange and communicated with the first fluid cavity, the second flange is provided with a second fluid cavity, the other ends of the plurality of heat exchange tubes are connected with the second flange and communicated with the second fluid cavity, and a leading-out hole for leading out the lead-out wire is formed in the peripheral wall of at least one of the first fluid cavity and the second fluid cavity;
Sealing means for a small penetration on a high temperature high pressure fluid pipe cavity according to any one of claims 1-6, said sealing means being provided on said first flange and/or said second flange for sealing said exit aperture.
8. The heat exchanger of claim 7, wherein the thermocouple is a sheathed thermocouple.
9. The heat exchanger of claim 7, wherein the maximum radial dimension of the portion of the thermocouple extending into the heat exchange tube is no greater than 1mm.
10. The heat exchanger of claim 7, wherein the temperature measurement device further comprises: the support rod stretches into the heat exchange tube from one end of the heat exchange tube and extends along the length direction of the heat exchange tube, a plurality of thermocouples are all fixed on the support rod, and the temperature measuring ends of the thermocouples are spaced apart from the support rod and the inner peripheral wall of the heat exchange tube.
11. The heat exchanger of claim 10, wherein the support rods are steel rods and the maximum radial dimension of the support rods is no greater than 4mm.
12. The heat exchanger of claim 7, wherein an outer peripheral wall of the heat exchange tube is provided with an outer tube thermocouple for measuring the temperature of fluid outside the heat exchange tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010037166.6A CN113187898B (en) | 2020-01-14 | 2020-01-14 | Sealing device for small penetrating piece on cavity and heat exchanger with sealing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010037166.6A CN113187898B (en) | 2020-01-14 | 2020-01-14 | Sealing device for small penetrating piece on cavity and heat exchanger with sealing device |
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| CN113187898A CN113187898A (en) | 2021-07-30 |
| CN113187898B true CN113187898B (en) | 2024-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010037166.6A Active CN113187898B (en) | 2020-01-14 | 2020-01-14 | Sealing device for small penetrating piece on cavity and heat exchanger with sealing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113804320B (en) * | 2021-09-07 | 2023-05-02 | 西安交通大学 | Lead sealing device of high-temperature high-pressure open-end thermocouple |
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| US20050155748A1 (en) * | 2003-08-29 | 2005-07-21 | Dana Canada Corporation | Concentric tube heat exchanger end seal therefor |
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| US5639095A (en) * | 1988-01-04 | 1997-06-17 | Twentieth Technology | Low-leakage and low-instability labyrinth seal |
| EP0796696A1 (en) * | 1996-03-19 | 1997-09-24 | Framatome | Method and device for withdrawing part of a tube from a heat exchanger and use of the method and the device |
| CN1636837A (en) * | 2003-12-23 | 2005-07-13 | 沃易斯涡轮股份有限公司 | Packaged unit with thermal fuse function |
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| CN113187898A (en) | 2021-07-30 |
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