CN211425149U - Heat exchanger with good heat conduction effect - Google Patents
Heat exchanger with good heat conduction effect Download PDFInfo
- Publication number
- CN211425149U CN211425149U CN201922324102.XU CN201922324102U CN211425149U CN 211425149 U CN211425149 U CN 211425149U CN 201922324102 U CN201922324102 U CN 201922324102U CN 211425149 U CN211425149 U CN 211425149U
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- pipe
- flange
- exchange tube
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000000694 effects Effects 0.000 title claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 77
- 238000007789 sealing Methods 0.000 claims description 43
- 238000010030 laminating Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 11
- 239000007788 liquid Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- -1 light industry Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a heat exchanger that heat conduction effect is good relates to heat exchanger technical field for the chemical industry, for the problem that the heat exchanger heat transfer efficiency of solving the chemical industry among the prior art is low. The utility model discloses a heat exchange tube, including heat exchange tube, cold fluid admission pipe, cold fluid outlet pipe, first flange group is installed to the below of cold fluid admission pipe, second flange group is installed to the top of cold fluid outlet pipe, the sealed head of second is installed to the one end of heat exchange tube, the third flange is installed to one side of first sealed head, the fourth flange is installed to one side of the sealed head of second, the hot-fluid admission pipe is installed to one side of first sealed head, the hot-fluid outlet pipe is installed to one side of the sealed head of second, the conveyer pipe is all installed to the inside of first sealed head and the sealed head of second, the inside of first sealed head is provided with first airtight chamber, the internally mounted of heat exchange tube has the fan-shaped heat exchange tube.
Description
Technical Field
The utility model relates to a heat exchanger technical field for the chemical industry specifically is a heat exchanger that heat conduction effect is good.
Background
The heat exchanger is an energy-saving device for transferring heat between materials between two or more than two kinds of fluids with different temperatures, the heat is transferred from the fluid with higher temperature to the fluid with lower temperature, the temperature of the fluid reaches the index specified by the process so as to meet the requirement of process conditions, and the heat exchanger is one of main devices for improving the energy utilization rate, and the heat exchanger industry relates to more than 30 industries such as heating ventilation, pressure vessels, reclaimed water treatment equipment, chemical industry, petroleum and the like, and forms an industrial chain mutually.
Heat exchangers are often used to heat a low temperature fluid or cool a high temperature fluid, vaporize the liquid into vapor or condense the vapor into liquid in the industrial production of petroleum, chemical, light industry, pharmaceuticals, energy, etc., a heat exchanger can be a unit device, such as a heater, a cooler, a condenser, etc., or may be a component of a process unit, such as a heat exchanger in an ammonia synthesis column, for some reactors or reaction kettles, even pipelines in the chemical industry, the temperature condition of the internal medium is very strict, therefore, the heat exchanger is generally adopted to adjust the temperature, and because the conditions are strict, the heat exchanger with high heat transfer efficiency in the current market has large volume and the heat exchanger with small volume has low heat transfer efficiency, therefore, the heat exchangers for chemical industry at present generally have low heat transfer efficiency, so that equipment has to be added in a factory, and the production cost of the factory is increased; therefore, the market urgently needs to develop a heat exchanger with good heat conduction effect to help people solve the existing problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a heat exchanger that heat conduction effect is good to the heat exchanger heat transfer efficiency who provides among the solution above-mentioned background art for chemical industry is low problem.
In order to achieve the above object, the utility model provides a following technical scheme: a heat exchanger with good heat conduction effect comprises a heat exchange tube and a first sealing head, wherein a cold fluid inlet tube is installed above the heat exchange tube, a cold fluid outlet tube is installed below the heat exchange tube, a first flange set is installed below the cold fluid inlet tube, a second flange set is installed above the cold fluid outlet tube, a second sealing head is installed at one end of the heat exchange tube, a third flange is installed on one side of the first sealing head, a fourth flange is installed on one side of the second sealing head, a hot fluid inlet tube is installed on one side of the first sealing head, a hot fluid outlet tube is installed on one side of the second sealing head, first fixing screws are installed above the third flange and the fourth flange, second fixing screws are installed above the first flange set and the second flange set, and conveying tubes are installed inside the first sealing head and the second sealing head, the inside of first sealed head is provided with first airtight chamber, the internally mounted of heat exchange tube has first sealed piece, the internally mounted of heat exchange tube has the fan-shaped heat exchange tube, the sealed piece of second is all installed to the inside of the sealed head of second and first sealed head, the inside of the sealed head of second is provided with the airtight chamber of second.
Preferably, the cold fluid inlet pipe and the heat exchange pipe are both fixedly connected with the first flange set through second fixing screws, and the cold fluid inlet pipe and the heat exchange pipe are fixedly connected through the first flange set.
Preferably, the cold fluid outflow pipe and the heat exchange pipe are both fixedly connected with the second flange set through second fixing screws, and the cold fluid outflow pipe and the heat exchange pipe are fixedly connected through the second flange set.
Preferably, the first sealing head and the heat exchange tube are fixedly connected with the third flange through first fixing screws, the second sealing head and the heat exchange tube are fixedly connected with the fourth flange through first fixing screws, the first sealing head and the heat exchange tube are fixedly connected with the third flange, and the second sealing head and the heat exchange tube are fixedly connected with the fourth flange.
Preferably, the hot fluid inlet pipe and the hot fluid outlet pipe are both in threaded connection with the conveying pipe, sealing rings are arranged at the joints of the hot fluid inlet pipe and the hot fluid outlet pipe with the conveying pipe, the first sealing head and the second sealing head are both fixedly connected with the second sealing block through fastening screws, the conveying pipe is attached to the second sealing block, and the second sealing block is provided with two sealing blocks.
Preferably, first sealed piece is provided with two, two first sealed piece all passes through fastening screw and heat exchange tube fixed connection, two first sealed piece all laminates with the conveyer pipe, the fan-shaped heat exchange tube sets up structure as an organic whole with the conveyer pipe.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a setting through fan blade shape heat exchange tube, in the hot-fluid gets into the heat exchange tube through the hot-fluid admission pipe when chemical plant's hot-fluid, compress the hot-fluid earlier through the conveyer pipe, make its velocity of flow become fast, play primary radiating effect, carry the inside of fan blade shape heat exchange tube with the hot-fluid through the conveyer pipe, fan blade shape heat exchange tube will follow four directions of conveyer pipe and distribute, thereby the area of contact of the inside condensate of heat exchange tube and fan blade shape heat exchange tube has been increased, from making the inside hot-fluid of fan blade shape heat exchange tube can obtain abundant heat dissipation, also make the condensate can be abundant siphon away the heat that fan blade shape heat exchange tube top distributed out, thereby heat transfer efficiency has been improved, replace traditional cylindrical cooling tube, make the heat exchanger can be fit for the strict chemical plant of condition more.
2. The utility model discloses a setting through first airtight chamber, set up first airtight chamber in first sealed head, set up the sealed chamber of second in the sealed head of second, make and be full of gas in the sealed chamber, make its inside atmospheric pressure be greater than the inside atmospheric pressure of conveyer pipe and heat exchange tube, thereby make inside gas or liquid can't flow, when the conveyer pipe takes place to leak, can make inside liquid or gas inside by the anti-rebound of the atmospheric pressure in sealed chamber inside, make it can not corrode external environment, strive for more times for workman's maintenance, the safety in utilization of equipment has been improved, the harm that equipment probably caused to the mill has been reduced.
Drawings
Fig. 1 is an overall schematic view of a heat exchanger with good heat conduction effect according to the present invention;
fig. 2 is a front cross-sectional view of a heat exchanger with good heat conduction effect according to the present invention;
fig. 3 is the utility model discloses a cross-sectional view that heat exchanger that the heat conduction effect is good looked sideways.
In the figure: 1. a heat exchange pipe; 2. a cold fluid inlet pipe; 3. a cold fluid outflow pipe; 4. a first flange group; 5. a second flange set; 6. a first sealing head; 7. a second sealing head; 8. a third flange; 9. a fourth flange; 10. a hot fluid inlet pipe; 11. a hot fluid outflow pipe; 12. a first fixing screw; 13. a second fixing screw; 14. a delivery pipe; 15. a first closed cavity; 16. a first seal block; 17. a fan-shaped heat exchange tube; 18. a second seal block; 19. a second closed cavity.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-3, the present invention provides an embodiment: a heat exchanger with good heat conduction effect comprises a heat exchange tube 1 and a first sealing head 6, a cold fluid inlet tube 2 is arranged above the heat exchange tube 1, a cold fluid outlet tube 3 is arranged below the heat exchange tube 1, a first flange group 4 is arranged below the cold fluid inlet tube 2, a second flange group 5 is arranged above the cold fluid outlet tube 3, a second sealing head 7 is arranged at one end of the heat exchange tube 1, a third flange 8 is arranged at one side of the first sealing head 6, a fourth flange 9 is arranged at one side of the second sealing head 7, a hot fluid inlet tube 10 is arranged at one side of the first sealing head 6, a hot fluid outlet tube 11 is arranged at one side of the second sealing head 7, first fixing screws 12 are arranged above the third flange 8 and the fourth flange 9, second fixing screws 13 are arranged above the first flange group 4 and the second flange group 5, conveying tubes 14 are arranged inside the first sealing head 6 and the second sealing head 7, the first sealed cavity 15 is arranged inside the first sealed head 6, the first sealed block 16 is arranged inside the heat exchange tube 1, the fan-shaped heat exchange tube 17 is arranged inside the heat exchange tube 1, the second sealed block 18 is arranged inside the second sealed head 7 and the first sealed head 6, and the second sealed cavity 19 is arranged inside the second sealed head 7.
Furthermore, the cold fluid inlet pipe 2 and the heat exchange pipe 1 are fixedly connected with the first flange set 4 through the second fixing screws 13, the cold fluid inlet pipe 2 and the heat exchange pipe 1 are fixedly connected with the first flange set 4, all pipelines are made of high-corrosion-resistant inlet materials, the internal structure is guaranteed not to be damaged easily, and the risk during production is reduced.
Further, the cold fluid outflow pipe 3 and the heat exchange pipe 1 are fixedly connected with the second flange set 5 through a second fixing screw 13, the cold fluid outflow pipe 3 and the heat exchange pipe 1 are fixedly connected with the second flange set 5, and liquid or liquid in the cold fluid outflow pipe cannot flow out by adopting a navigation-level flange sealing technology.
Further, first sealed head 6 and heat exchange tube 1 are all through first fixed screw 12 and third flange 8 fixed connection, sealed head 7 of second and heat exchange tube 1 are all through first fixed screw 12 and fourth flange 9 fixed connection, first sealed head 6 passes through third flange 8 fixed connection with heat exchange tube 1, sealed head 7 of second passes through fourth flange 9 fixed connection with heat exchange tube 1, sealed head adopts stainless steel alloy anticorrosion material, non-deformable, difficult rust, difficult quilt corrodes.
Further, hot-fluid admission pipe 10 and hot-fluid outflow pipe 11 all with conveyer pipe 14 threaded connection, hot-fluid admission pipe 10 and hot-fluid outflow pipe 11 all are provided with the sealing washer with conveyer pipe 14's junction, first sealed head 6 and second seal head 7 all pass through fastening screw fixed connection with the sealed piece 18 of second, conveyer pipe 14 and the 18 laminating of the sealed piece of second, the sealed piece 18 of second is provided with two, conveyer pipe 14 adopts the material of high-efficient transmission heat energy, reduce heat transfer time, and the heat transfer efficiency is improved.
Further, first sealed piece 16 is provided with two, and two first sealed pieces 16 all pass through fastening screw and heat exchange tube 1 fixed connection, and two first sealed pieces 16 all laminate with conveyer pipe 14, and fan-shaped heat exchange tube 17 sets up structure as an organic whole with conveyer pipe 14, and fan-shaped heat exchange tube 17 adopts high anticorrosion material to reduce its inner wall thickness, when not influencing life and production safety, improve equipment's heat transfer efficiency.
The working principle is as follows: when the device is used in a chemical plant to adjust the temperature of a medium in a reactor, hot fluid enters the conveying pipe 14 through the hot fluid inlet pipe 10, condensate enters the heat exchange pipe 1 through the cold fluid inlet pipe 2, the outlet of the cold fluid outlet pipe 3 is sealed by the plugging device to fill the interior of the heat exchange pipe 1 with the condensate, the plugging device also plugs the outlet of the hot fluid outlet pipe 11 to fill the interior of the fan-shaped heat exchange pipe 17 with the hot fluid, when the heat exchange pipe 1 and the fan-shaped heat exchange pipe 17 are filled with the interior, the outlets of the cold fluid outlet pipe 3 and the hot fluid outlet pipe 11 are opened, the flow rates of the two are adjusted to keep the two in a full state in the heat exchange pipe 1 and the fan-shaped heat exchange pipe 17, so that the fan-shaped heat exchange pipe 17 can be fully covered with the condensate, and the condensate can fully cool the hot fluid in the fan-shaped heat exchange pipe 17, therefore, the temperature of the hot fluid is reduced to the temperature required by work, the hot fluid which is cooled and meets the work requirement enters the reactor equipment through the hot fluid outflow pipe 11 to continue to work, the condensate cannot flow into the first sealing head 6 and the second sealing head 7 through the arrangement of the first sealing block 16, the tightness of the heat exchange pipe 1 is improved, the gas in the sealing cavity cannot leak into the heat exchange pipe 1 through the arrangement of the second sealing block 18, and the condensate inside the heat exchange pipe 1 is prevented from being polluted.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a heat exchanger that conduction effect is good, includes heat exchange tube (1) and first sealing head (6), its characterized in that: the heat exchange tube is characterized in that a cold fluid inlet tube (2) is installed above the heat exchange tube (1), a cold fluid outlet tube (3) is installed below the heat exchange tube (1), a first flange set (4) is installed below the cold fluid inlet tube (2), a second flange set (5) is installed above the cold fluid outlet tube (3), a second sealing head (7) is installed at one end of the heat exchange tube (1), a third flange (8) is installed at one side of the first sealing head (6), a fourth flange (9) is installed at one side of the second sealing head (7), a hot fluid inlet tube (10) is installed at one side of the first sealing head (6), a hot fluid outlet tube (11) is installed at one side of the second sealing head (7), and first fixing screws (12) are installed above the third flange (8) and the fourth flange (9), second fixed screw (13) are all installed to the top of first flange group (4) and second flange group (5), conveyer pipe (14) are all installed to the inside of first sealed head (6) and second sealed head (7), the inside of first sealed head (6) is provided with first airtight chamber (15), the internally mounted of heat exchange tube (1) has first sealed piece (16), the internally mounted of heat exchange tube (1) has fan-shaped heat exchange tube (17), the inside of second sealed head (7) and first sealed head (6) all installs second sealed piece (18), the inside of second sealed head (7) is provided with second airtight chamber (19).
2. The heat exchanger with good heat conduction effect according to claim 1, characterized in that: the cold fluid inlet pipe (2) and the heat exchange pipe (1) are fixedly connected with the first flange set (4) through second fixing screws (13), and the cold fluid inlet pipe (2) and the heat exchange pipe (1) are fixedly connected through the first flange set (4).
3. The heat exchanger with good heat conduction effect according to claim 1, characterized in that: the cold fluid outflow pipe (3) and the heat exchange pipe (1) are fixedly connected with a second flange set (5) through a second fixing screw (13), and the cold fluid outflow pipe (3) and the heat exchange pipe (1) are fixedly connected through the second flange set (5).
4. The heat exchanger with good heat conduction effect according to claim 1, characterized in that: first sealed head (6) and heat exchange tube (1) all are through first fixed screw (12) and third flange (8) fixed connection, second sealed head (7) and heat exchange tube (1) all are through first fixed screw (12) and fourth flange (9) fixed connection, first sealed head (6) are through third flange (8) fixed connection with heat exchange tube (1), second sealed head (7) are through fourth flange (9) fixed connection with heat exchange tube (1).
5. The heat exchanger with good heat conduction effect according to claim 1, characterized in that: hot-fluid admission pipe (10) and hot-fluid outflow pipe (11) all with conveyer pipe (14) threaded connection, the junction of hot-fluid admission pipe (10) and hot-fluid outflow pipe (11) and conveyer pipe (14) all is provided with the sealing washer, first sealed head (6) and second seal head (7) all pass through fastening screw fixed connection with second seal block (18), conveyer pipe (14) and the laminating of second seal block (18), second seal block (18) are provided with two.
6. The heat exchanger with good heat conduction effect according to claim 1, characterized in that: first sealed piece (16) are provided with two, two first sealed piece (16) all are through fastening screw and heat exchange tube (1) fixed connection, two first sealed piece (16) all laminate with conveyer pipe (14), fan-shaped heat exchange tube (17) set up structure as an organic whole with conveyer pipe (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922324102.XU CN211425149U (en) | 2019-12-23 | 2019-12-23 | Heat exchanger with good heat conduction effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922324102.XU CN211425149U (en) | 2019-12-23 | 2019-12-23 | Heat exchanger with good heat conduction effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211425149U true CN211425149U (en) | 2020-09-04 |
Family
ID=72275843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922324102.XU Expired - Fee Related CN211425149U (en) | 2019-12-23 | 2019-12-23 | Heat exchanger with good heat conduction effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211425149U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046332A (en) * | 2022-06-21 | 2022-09-13 | 南通欧意姆制冷设备有限公司 | Impeller type evaporation heat exchanger of refrigerating system |
-
2019
- 2019-12-23 CN CN201922324102.XU patent/CN211425149U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046332A (en) * | 2022-06-21 | 2022-09-13 | 南通欧意姆制冷设备有限公司 | Impeller type evaporation heat exchanger of refrigerating system |
| CN115046332B (en) * | 2022-06-21 | 2024-01-19 | 南通欧意姆制冷设备有限公司 | Impeller type evaporation heat exchanger of refrigerating system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103453788A (en) | Gas plate type heat exchanger | |
| CN211425149U (en) | Heat exchanger with good heat conduction effect | |
| CN104315889A (en) | Graphite triple-effect hole type heat exchanger with circular blocks | |
| CN211317023U (en) | Silicon carbide double-tube-plate heat exchanger | |
| CN209261917U (en) | A kind of centrifugal pump higher ketone cooling device | |
| CN209672865U (en) | A kind of evaporation type oil cooler | |
| CN206798286U (en) | A kind of detachable steel storage tank outer heating device | |
| CN210512743U (en) | Novel explosion-proof heat exchanger | |
| CN204705238U (en) | Sealed single-pipe carborundum tubular heat exchanger | |
| CN208567597U (en) | Double convection current pipe heat exchangers inside and outside one kind | |
| CN210321382U (en) | Leak detection tool for heat exchanger | |
| CN209672885U (en) | A kind of spiral interior circularly cooling heat exchanger | |
| CN207281688U (en) | A kind of novel computer water-cooling heat radiating device | |
| CN106679463A (en) | Silicon carbide shell-and-tube heat exchanger | |
| CN205102647U (en) | Superconductive heat exchanger | |
| CN212620280U (en) | Efficient energy-saving full-liquid heat exchanger with good heat exchange effect | |
| CN215337916U (en) | Chemical heat exchange equipment | |
| CN204100859U (en) | Graphite-made triple effect circular block pore type heat exchanger | |
| CN213238565U (en) | Titanium tube heat exchanger that heat exchange efficiency is high | |
| CN214199784U (en) | Anti-corrosion heat exchanger | |
| CN209101857U (en) | A kind of energy-saving graphite heat exchanger | |
| CN213041070U (en) | Shell-and-tube heat exchanger convenient to dismantle maintenance | |
| CN103644750A (en) | Heat exchanger of smoke and hot water boiler | |
| CN219347482U (en) | Fin of heat exchanger | |
| CN219103763U (en) | Titanium tube heat exchanger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200904 |