CN218994171U - Modularized heat protection structure for rocket launching pad - Google Patents
Modularized heat protection structure for rocket launching pad Download PDFInfo
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- CN218994171U CN218994171U CN202223351309.4U CN202223351309U CN218994171U CN 218994171 U CN218994171 U CN 218994171U CN 202223351309 U CN202223351309 U CN 202223351309U CN 218994171 U CN218994171 U CN 218994171U
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Abstract
The utility model discloses a modularized heat protection structure of a rocket launching pad. The thermal protection module is applied to the rocket launching pad body and other parts, and the preparation flow of the thermal protection module is as follows: the heat protection coating is prefabricated on a pre-designed and processed steel lining plate, the heat protection coating is fixedly installed through a welding stud welded on a transmitting frame system structure, and the joint of a mounting hole and a module is coated with the same heat protection coating. The modularized heat protection mechanism has the following advantages: (1) The thermal protection module can be processed in a factory in advance, the coating construction condition is controllable, and the construction quality is controllable. (2) The heat protection module after processing can be installed on site, and the heat protection coating at the joint can be coated after the installation is finished, so that the site construction time is short, and the whole progress of engineering is not influenced.
Description
Technical Field
The utility model relates to a heat protection structure for a rocket launching pad, in particular to a modularized heat protection structure, and belongs to the field of high-temperature resistant heat insulation protection.
Background
With the development of aerospace industry, in addition to the thermal protection of the aircraft itself, thermal protection measures are added to ground facilities such as rocket launching pads. The body of the rocket launching platform in China mostly adopts an integrated design, and the thermal protection construction of the body can only be carried out on site, if the construction site is exposed to strong wind, rainfall, low temperature or other extreme weather, the construction can not be carried out, thereby influencing the construction quality and the engineering progress. The modularized heat protection scheme can prefabricate the heat protection coating on the heat protection module under ideal construction conditions, transport the heat protection coating to an installation site after preparation is completed, then install the module and coat the heat protection coating at the joint, improves the stability of the heat protection coating performance, ensures the reliability of the ablation resistance performance of the heat protection module, accelerates the construction progress, and enhances the maintenance guarantee of the heat protection coating.
The rocket launching pad adopts a modularized heat protection structure, so that the heat protection construction stability can be improved, the construction period is shortened, and the maintenance guarantee of the heat protection coating is enhanced.
Disclosure of Invention
The utility model aims to provide a modularized heat protection structure for a rocket launching pad, wherein heat protection coating is coated on a steel lining plate which is designed and processed in advance, and a module is fixed on a launching frame system structure through a cylindrical bolt post welded on the steel lining plate after the heat protection coating is prefabricated. The launching pad is protected from the scouring and destruction of the rocket tail flame by a modularized heat protection structure.
The utility model solves the problems by adopting the following technical scheme:
the steel lining board is welded with steel battens with the thickness of 2-4 m at the position 20-30 mm away from the outer edge of the lining board, and the height of the welded battens is 5-15mm;
the steel plate strip is made of carbon steel, alloy steel and the like;
the welded steel plate strips form a closed graph;
a plurality of strips with the same height and the same thickness are longitudinally and transversely welded in the welded closed strips on the steel lining plate, and the height of the welded strips is 5-15mm;
the heights of all the welded steel strips can be changed according to actual application conditions;
the coated heat protection paint is coated inside the closed batten, and the coating height is 2-5 mm higher than the height of the batten;
the welding cylindrical bolt is arranged outside the closing batten and has a sealing function;
the outer diameter of the cylindrical bolt is 4-7 mm, the inner diameter is 3.5-6.5 mm, and the height is 6-12 mm;
the upper part of the inner side of the cylindrical bolt column is provided with etched stripes, the stripes can be parallel, grid-shaped and the like, and the stripe height is 3-5 mm;
the cylindrical bolt is made of carbon steel, alloy steel and the like;
the bolt column cap is made of silica gel, polytetrafluoroethylene and the like;
the diameter of the bolt column cap is 0.5mm larger than the outer diameter of the bolt column, and the thickness of the cap is 3-5 mm;
the bolt column is provided with a cylindrical boss, the outer diameter of the boss is the same as the inner diameter of the bolt column, and the height of the boss is 2-4 mm;
the outer sides of the bolt column bosses are provided with etched stripes which can be parallel, grid-shaped and the like.
After the thermal protection coating is prefabricated to the module, the seam of the module is coated by the same thermal protection coating after being installed on site.
The structure has excellent ablation resistance, construction flexibility and maintenance guarantee, and can be used for heat protection of one or more than two of the following parts:
the thermal protection device can be used for thermal protection of rocket launching platforms and auxiliary facilities thereof, missile launching sites or rocket engine test beds, or thermal protection of relevant parts of ships.
After the rocket launching pad is installed on site by the structure, the same kind of thermal protection paint is coated on the paint layers coated in the closed graph at the joint of the installation hole and the module, and the height of the coating paint layers is the same as that of the paint layers coated in the closed graph.
The thermal protection module is applied to the rocket launching pad body and other parts, and the preparation flow of the thermal protection module is as follows: the heat protection coating is prefabricated on a pre-designed and processed steel lining plate, the heat protection coating is fixedly installed through a welding stud welded on a transmitting frame system structure, and the joint of a mounting hole and a module is coated with the same heat protection coating. The modularized heat protection mechanism has the following advantages: (1) The thermal protection module can be processed in a factory in advance, the coating construction condition is controllable, and the construction quality is controllable. (2) The heat protection module after processing can be installed on site, and the heat protection coating at the joint can be coated after the installation is finished, so that the site construction time is short, and the whole progress of engineering is not influenced. (3) Through the mode of changing thermal protection module, improved the guarantee nature of maintenance, reduced cost of maintenance. (4) The modularized heat protection coating can not generate cracks due to environmental problems (wind, low temperature, high temperature and insolation), and has strong environmental adaptability. (5) The modularized heat protection coating has excellent ablation resistance, can be used for heat protection of rocket launching platforms and auxiliary facilities thereof, missile launching sites and rocket engine test platforms, and can also be used for heat protection of relevant parts of ships.
The utility model has the advantages and beneficial effects that:
the modularized heat protection structure disclosed by the utility model can flexibly customize the types and thicknesses of heat protection modularized heat protection coating, the structures of modules and the like according to other conditions such as the heat flux density, the ablation time and the like of a rocket engine; the prefabrication construction of the thermal protection module can be carried out in a proper construction environment, and the prefabricated thermal protection module is subjected to working procedures such as maintenance and the like under a better condition, so that the mechanical strength and the ablation resistance reach the optimal state; after the prefabricated thermal protection module is transported to the site, only the installation and the coating of gaps are needed, so that the construction period is shortened; after the thermal protection module is damaged after being used, only the corresponding module needs to be replaced, so that maintenance assurance is enhanced.
Drawings
FIG. 1 is a schematic front view of a thermal protection module structure;
FIG. 2 is an overall schematic diagram of a thermal protection module structure;
fig. 3 is a schematic view of a thermal protection module bolt post and cap. In the figure: 1 is a steel lining board, 2 is a steel lath, and 3 is a bolt post.
Detailed Description
The utility model will be further described with reference to specific examples and accompanying tables, and advantages and features of the utility model will become apparent as the description proceeds.
As shown in fig. 1 and 2; in the drawings, 1 is a schematic front view of a heat protection module structure, 2 is a schematic overall view of the heat protection module structure, and 3 is a schematic view of a bolt column and a cap of the heat protection module.
Example 1
1. Thermal protection module test plate preparation
(1) The method comprises the steps of machining a lining plate with the size of 120mm, 7mm (length, width, thickness), respectively welding steel strips with the length of 70mm, the height of 20mm and the thickness of 3mm on the upper surface at the position, which is 25mm away from four sides of the lining plate, welding and fixing adjacent steel strips to form a square closed graph, longitudinally welding a steel strip with the size of 70mm, 20mm and 3mm inside the closed graph (through the geometric center), transversely welding two steel strips with the size of 35mm, 20mm and 3mm (one ends of the steel strips are respectively close to the geometric center), and enabling the steel strips welded on the upper surface of the lining plate to form a 'field'. 8 hollow cylindrical bolt columns with the outer diameter of 5mm, the inner diameter of 4.5mm and the height of 8mm are welded on the outer side (between the peripheral edges of the lining plate and the closed graph) of the closed steel plate strip. The upper half part of the inner wall surface of the cylindrical bolt column is etched with a plurality of annular strips which are perpendicular to the height direction, are parallel to each other and are spaced, so as to form a strip zone, and the height of the strip zone is 4mm. The lock has the block on the bolt post, and the bolt post block is the silica gel material, and it is a circular dull and stereotyped, and circular dull and stereotyped lower surface middle part is equipped with cylindrical boss, and circular dull and stereotyped diameter is 5.5mm, and thickness is 4mm, and the diameter of cylindrical boss is 4.5mm on it, and the height of boss is 3mm, and the sculpture has cyclic annular, the parallel each other of a plurality of stripes of interval perpendicular to direction of height on the boss lateral wall face. Round through holes are formed in the hollow areas in the steel lining plate and the bolt columns;
(2) A thermal protection module liner was again fabricated according to the dimensions of (1) and the two liners were secured side-by-side on 240 x 120mm x 10mm (length x width x thickness) steel plates using bolts with hexagon socket nuts passing through circular through holes to form 240 x 120mm x 7mm thermal protection module test plates. After the module is fixed, the bolts of the inner hexagon nuts are sealed in the bolt columns by utilizing the silica gel caps, so that the bolts of the inner hexagon nuts used for fixing are bonded and cannot be detached.
2. Preparation of a thermal protective coating:
(1) The manufacturer on the market is a bonding steel adhesive for reinforcing doctor (Shanghai) building technology Co., ltd, the bonding strength steel-to-steel tensile strength is 16.8Mpa, the bonding steel adhesive is used for coating the upper surface of a thermal protection module test plate, and the coating thickness is 3mm;
(2) The high-temperature wear-resistant corundum mullite unshaped refractory material of the Ziborbang refractory heat-insulating material limited company is purchased in the market and coated on the building structural adhesive, wherein the coating thickness is 25mm;
(3) Curing for 24h at room temperature.
3. Ablation structure of thermal protection module
The sample block prepared above was subjected to a test of the back surface temperature of the test piece using a YA6804 type oxygen kerosene engine. Test conditions: engine combustion chamber pressure: pc=1.4±0.05MPa; engine Yu Yang coefficient: α=0.7±0.03; engine nozzle diameter: 65mm; nozzle outlet gas temperature: 2210K; nozzle outlet gas velocity: 2390m/s; combustion chamber temperature: 3470K; ablation test time: 5 s/piece; heat flux density: 13.1Mw/m 2 . The test conditions are that the tail flame blowing condition during rocket launching is simulated, the flame blowing is carried out on the surface coated with the thermal protection coating, and the average line ablation rate and the back temperature of the steel plate after ablation are tested. The ablation results were: average line ablation rate0.721mm/s, back temperature 59 ℃. The surface of the refractory material is normally ablated, has no cracking and no delamination on site.
Comparative example 1
1. Preparation of thermal protection test plate
The same steel plate as in example 1 was cut to prepare heat protection panels having dimensions 240mm 120mm 17mm (length width thickness).
2. Preparation of a thermal protective coating:
(1) The same building structural adhesive in the embodiment 1 is adopted to coat the upper surface of the thermal protection test plate, and the coating thickness is 3mm;
(2) The same mullite-based refractory material in the example 1 is adopted to coat the building structural adhesive, and the coating thickness is 25mm;
(3) Curing for 24h at room temperature.
3. Ablation structure of thermal protection module
The sample block prepared above was subjected to a test of the back surface temperature of the test piece using a YA6804 type oxygen kerosene engine. Test conditions: engine combustion chamber pressure: pc=1.4±0.05MPa; engine Yu Yang coefficient: α=0.7±0.03; engine nozzle diameter: 65mm; nozzle outlet gas temperature: 2210K; nozzle outlet gas velocity: 2390m/s; combustion chamber temperature: 3470K; ablation test time: 5 s/piece; heat flux density: 13.1Mw/m 2 . The test conditions are that the tail flame blowing condition during rocket launching is simulated, the flame blowing is carried out on the surface coated with the thermal protection coating, and the average line ablation rate and the back temperature of the steel plate after ablation are tested. The ablation results were: the average line ablation rate was 0.752mm/s and the back temperature was 59.3 ℃. The surface of the refractory material is normally ablated, has no cracking and no delamination on site.
According to the ablation test results of the embodiment 1 and the comparative embodiment 1, it can be seen that under the same test conditions, the ablation results of the heat protection module in the embodiment 1 and the same heat protection coating formed integrally are respectively 0.721mm/s and 0.752mm/s of average line ablation rate, and the back temperature is 59 ℃ and 59.3 ℃ taking test errors and other factors into consideration, and the two are almost consistent in terms of ablation resistance, so that the heat protection module in the utility model can ensure the ablation resistance and structural stability of the heat protection coating and also has the construction quality and maintenance assurance.
Claims (4)
1. The utility model provides a rocket launching pad is with modularization heat protection's structure which characterized in that:
the method comprises the steps that a steel lining plate is welded at the upper surface of the steel lining plate, the welding thickness is 2-4 mm parallel to the direction of the upper surface of the steel lining plate at the position 20-30 mm away from the peripheral edge of the lining plate, the height of the welded steel batten is 5-25mm perpendicular to the direction of the upper surface of the steel lining plate, and a closed graph area surrounded by an annular batten is formed on the upper surface of the steel lining plate;
and coating a coating layer in the closed pattern, wherein the height of the coating layer is 2-8 mm higher than that of the batten.
2. The structure according to claim 1, characterized in that:
the upper surface of the steel lining board in the annular lath area is welded with 1 or more than 2 laths with the same height and thickness as the annular lath longitudinally, transversely or obliquely by adopting the steel lath.
3. The structure according to claim 1 or 2, characterized in that: the upper surface of the steel lining plate outside the closed annular batten is welded with 3 or more cylindrical hollow bolt posts with a sealing function, and round through holes are formed in the steel lining plate and in hollow areas inside the bolt posts.
4. A structure according to claim 3, characterized in that: the outer diameter of the cylindrical bolt column is 4-7 mm, the inner diameter is 3.5-6.5 mm, the height is 6-12 mm, the upper half part of the inner wall surface of the bolt column is provided with etched stripes to form a stripe area, the stripes can be parallel and/or grid-shaped, and the height of the stripe area is 3-5 mm; the nut cap is buckled on the bolt column, the nut cap is made of silica gel and/or polytetrafluoroethylene, the nut cap is a round flat plate, a cylindrical boss is arranged in the middle of the lower surface of the round flat plate, the diameter of the round flat plate is larger than the outer diameter of the bolt column by 0.3-0.5mm, the thickness of the round flat plate is 3-5 mm, the outer diameter of the boss is identical to the inner diameter of the bolt column, the height of the boss is 2-4 mm, etched stripes are arranged on the side wall surface of the boss, the stripes can be parallel and/or grid-shaped, and the diameter of the round through hole is smaller than the inner diameter of the bolt column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223351309.4U CN218994171U (en) | 2022-12-14 | 2022-12-14 | Modularized heat protection structure for rocket launching pad |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223351309.4U CN218994171U (en) | 2022-12-14 | 2022-12-14 | Modularized heat protection structure for rocket launching pad |
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| CN218994171U true CN218994171U (en) | 2023-05-09 |
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| CN202223351309.4U Active CN218994171U (en) | 2022-12-14 | 2022-12-14 | Modularized heat protection structure for rocket launching pad |
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