阅读说明：本技术 真空环境中水蒸气捕集装置 (Water vapor trapping device in vacuum environment ) 是由 顾苗 丁文静 李昂 张立明 龚洁 韩潇 徐靖皓 于 2021-09-23 设计创作，主要内容包括：本发明公开了真空环境中水蒸气捕集装置,包括小车支架和捕集器本体,所述小车支架上安装有捕集装置本体,所述捕集装置本体的内部设置有以对水蒸气捕捉的换热部件,所述换热部件内部流通有液氮,所述捕集装置的顶部形成喇叭口搜集水蒸气,所述小车支架的底部设置有以对融水收集的集水器,所述集水器的底部连通有以排出融水的放液口。本发明中,冷凝管从上到下呈上疏下密的结构分布,这种排布设计的冷凝管能够防止水蒸气在进风面凝结过厚的冰,堵塞水蒸气进通道,保障捕集装置本体内部具有足够的水蒸气流通间隙,以使水蒸气在其中流动速度减慢,便于凝华在低温面上,提高水蒸气的凝结效率,同时可以增加不凝结气体的流动空间,便于抽真空。(The invention discloses a vapor trapping device in a vacuum environment, which comprises a trolley support and a trapping device body, wherein the trapping device body is installed on the trolley support, a heat exchange component for trapping vapor is arranged in the trapping device body, liquid nitrogen flows in the heat exchange component, a bell mouth is formed at the top of the trapping device for collecting vapor, a water collector for collecting melted water is arranged at the bottom of the trolley support, and a liquid discharge port for discharging the melted water is communicated with the bottom of the water collector. According to the invention, the condensation pipes are distributed in a structure of being sparse from top to bottom and dense from top to bottom, and the condensation pipes in the arrangement design can prevent water vapor from condensing too thick ice on the air inlet surface to block a water vapor inlet channel, so that a sufficient water vapor circulation gap is ensured to be formed in the trapping device body, the flow speed of the water vapor is reduced, the water vapor is convenient to desublimate on a low-temperature surface, the condensation efficiency of the water vapor is improved, meanwhile, the flow space of non-condensed gas can be increased, and the vacuumizing is convenient.)

1. Vapor entrapment device in vacuum environment, including dolly support (1), its characterized in that, install entrapment device body (2) on dolly support (1), the inside of entrapment device body (2) is provided with the heat transfer part in order to catch vapor, the inside circulation of heat transfer part has the liquid nitrogen, the top of entrapment device body (2) forms windward side (3) of horn mouth structure, the bottom of dolly support (1) is provided with in order to melt water collector (8) of collecting, the bottom intercommunication of water collector (8) has drain (9) in order to discharge the melt water.

2. The water vapor trapping device in the vacuum environment according to claim 1, wherein the heat exchanging component comprises a condensing tube (4) and a condensing fin (5), eight rows of condensing tubes (4) are installed inside the trapping device body in a staggered manner, and the condensing tubes (4) are all provided with the condensing fin (5).

3. The water vapor trapping device in the vacuum environment according to claim 2, wherein the uppermost row of the condensing tubes (4) is the first row, the first two rows of the condensing tubes (4) are arranged at a spacing of 120mm, the third and fourth rows of the condensing tubes (4) are arranged at a spacing of 100mm, and the last three rows of the condensing tubes (4) are arranged at a spacing of 80 mm.

4. The water vapor trapping device in the vacuum environment according to claim 3, wherein the condensation pipes (4) are all made of 304 stainless steel pipes with an outer diameter of 25mm and a wall thickness of 2mm, and the length of the condensation pipes (4) is 1100 mm.

5. The water vapor capturing device in vacuum environment as claimed in claim 4, characterized in that the condensation fins (5) are welded to the outer end of the condensation pipe (4) and are distributed horizontally and equidistantly, and the condensation fins (5) are made of copper.

6. The water vapor trapping device in the vacuum environment according to claim 5, characterized in that the height of the condensing fins (5) is 12mm, the thickness is 0.5mm, and the distance between two adjacent condensing fins (5) is 3 mm.

7. A device for trapping water vapor in a vacuum environment according to claim 6, characterized in that the open end of the condensation pipe (4) is connected with a bellows (7) for the liquid nitrogen to enter and exit through a flange (6).

Technical Field

The invention relates to the technical field of spacecraft vacuum thermal tests, in particular to a water vapor trapping device in a vacuum environment.

Background

The spacecraft vacuum thermal test is used for testing the thermal characteristics of the spacecraft and related products in a vacuum environment during in-orbit operation. The space suit is a special space product for maintaining the living environment of astronauts. Wherein the water sublimator is an important component of the space suit. The water sublimator is a special phase-change heat dissipation device. The main principle of the method is that in a vacuum environment, water can be sublimated from ice directly to form vapor, a large amount of heat is taken away, and therefore excessive waste heat inside the space suit is effectively discharged. Water sublimers need to be tested in a vacuum thermal test environment prior to formal use. According to the principle of the water sublimator, a large amount of water vapor is released by the water sublimator in the working process. Therefore, in the vacuum test process, a device is needed to absorb a large amount of water vapor, the water vapor is directly desublimated from a gaseous state to frost, and the vacuum environment for test is ensured.

As the structure of the heat exchanger of the water vapor trapping device, the heat exchanger is mainly characterized in that firstly, water is trapped, frost with a certain thickness is formed outside the pipe, secondly, after the frost is formed, non-condensable gas is pumped away by a vacuum pump through the water vapor trapping device, however, the thickness of the frost layer is increased along with the increase of time, so that the area of the gas passing through the tubular column is reduced, the circulation space of the gas is reduced, the flow speed of the water vapor is accelerated, and the condensation efficiency of the water vapor is influenced.

Disclosure of Invention

The invention aims to: in order to solve the above problems, a water vapor trap device in a vacuum environment has been proposed.

In order to achieve the purpose, the invention adopts the following technical scheme: the vapor trapping device in the vacuum environment comprises a trolley support, wherein a trapping device body is mounted on the trolley support, a heat exchange component for trapping vapor is arranged in the trapping device body, liquid nitrogen circulates in the heat exchange component, the top of the trapping device body forms a windward side of an open structure, a water collector for collecting melted water is arranged at the bottom of the trolley support, and a liquid discharging port for discharging the melted water is communicated with the bottom of the water collector.

Preferably, the heat exchange component comprises a condensation pipe and condensation fins, eight rows of condensation pipes are installed on the inner side of the trapping device body, and the condensation fins are embedded on the outer portion of the condensation pipes.

Preferably, the uppermost row of the condenser tubes is the first row, the arrangement distance between the first two rows of the condenser tubes is 120mm, the distance between the third row of the condenser tubes and the fourth row of the condenser tubes is 100mm, and the distance between the last three rows of the condenser tubes is 80 mm.

Preferably, the condensation pipe and the condensation fins are both made of 304 stainless steel pipes with the outer diameter of 25mm and the wall thickness of 2mm, and the length of the condensation pipe is 1100 mm.

Preferably, the outer end welding of condenser pipe has the fin that is horizontal equidistance and distributes, and the fin is the copper product.

Preferably, the height of the fin is 12mm, the thickness is 0.5mm, and the distance between two adjacent fins is 3 mm.

Preferably, the open end of the condensation pipe is connected with a corrugated pipe through a flange so as to enable liquid nitrogen to enter and exit.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. this application is through being equipped with the condenser pipe on catcher device body, be equipped with the condensation fin outside the condenser pipe, the range interval between two preceding rows of condenser pipes is 120mm, interval between third row and the fourth row condenser pipe is 100mm, interval between the last three rows condenser pipe is 80mm, be crisscross the distribution between the condenser pipe of two adjacent rows, this kind of condenser pipe of arranging the design can prevent that vapor from condensing into too thick ice at the windward side, block up the passageway, guarantee trapping device body inside has sufficient circulation space, so that vapor is wherein flow velocity slows down, be convenient for condense on the low temperature face, improve vapor's condensation efficiency, can increase the flow space of the gas that does not condense simultaneously, be convenient for take out the vacuum.

2. This application is through being equipped with the fin on the condenser pipe, and the height of fin is 12mm, and thickness is 0.5mm, and the interval of two adjacent fins is 3mm, adopts laser welding between fin and the condenser pipe, can effectively increase the area of catching water of vapor entrapment device.

Drawings

FIG. 1 illustrates a front view provided in accordance with an embodiment of the present invention;

FIG. 2 illustrates a top view provided in accordance with an embodiment of the present invention;

FIG. 3 illustrates a side view provided in accordance with an embodiment of the present invention;

fig. 4 illustrates a cross-sectional view of a condensation duct provided according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating a connection between a condensation pipe and a corrugated pipe according to an embodiment of the present invention.

Illustration of the drawings:

1. a trolley support; 2. a trapping device body; 3. the windward side; 4. a condenser tube; 5. a condensing fin; 6. a flange; 7. a bellows; 8. a water collector; 9. a liquid discharging port.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides a technical solution: vapor entrapment device in vacuum environment, including dolly support 1, install entrapment device body 2 on the dolly support 1, the inside of entrapment device body 2 is provided with in order to the heat transfer part of vapor entrapment, the inside circulation of heat transfer part has the liquid nitrogen, the windward side 3 of horn mouth structure is formed at the top of entrapment device body 2, the bottom of dolly support 1 is provided with the water collector 8 in order to melt water collection, the bottom intercommunication of water collector 8 has the drain 9 with the drainage melts water, the vapor that comes out from the water sublimator, through the discharge outlet 9 that melts waterThe collecting device body 2 is cooled by liquid nitrogen in the heat exchange component, water in water vapor is condensed and formed into ice on the outer surface of the heat exchange component, residual dry air is discharged out of the collecting device body 2 through the air outlet, when the heat exchange component does not work, the ice on the outer end face of the heat exchange component is melted into water and flows into the water collector 9, then the water collector 8 is discharged out of the water discharge port 9, and the required area of a cold wall required by frosting is 5.5 square meters through calculation. In addition, the air-cooled wall surface needs to meet the requirement of total air-cooled amount, the water frost thickness is within 10mm, the pumping speed and ultimate vacuum of the low-temperature cold wall surface to the water vapor are not influenced, and the density of the water frost formed on the 80K surface is about 0.1g/cm³14 kg of water cream with the volume of 140000cm³The required cold wall surface area is 14 square meters, 1.5 times of allowance is taken, the required low-temperature cold wall surface area is 21 square meters, the minimum area of the required cold wall surface is 21 square meters through comprehensive consideration of frost formation and vacuum, the margin of the cold wall surface is increased by considering the influence of uneven freezing thickness parameters, and the final heat exchange area of the heat exchange component is designed according to a square meter of 25.

Specifically, as shown in fig. 1-3, the heat exchange component includes condenser pipe 4 and condensing fin 5, eight rows of condenser pipes 4 are installed to the inboard of entrapment device body 2, condensing fin 5 has been inlayed to the surface of condenser pipe 4, one row of condenser pipe 4 of the superiors is first row, the range interval between two rows of preceding condenser pipes 4 is 120mm, the interval between third row and the fourth row of condenser pipe 4 is 100mm, the interval between three rows of condenser pipe 4 is 80mm at last, be crisscross the distribution between the condenser pipe 4 of two adjacent rows, condenser pipe 4 of this kind of design of arranging can prevent that humid air from condensing into ice at windward side 3, block up the passageway.

Calculating the heat dissipation area of the water vapor trapping device:

the cooling area of a single pipe is as follows: f₁＝πdL＝3.14×0.025×1.1＝0.08635㎡

The area of the condensing fin 5 outside the single pipe is as follows:

total cooling area of water vapor trap: f ═ F₁+F₂)×42＝0.852×56＝47.7㎡。

Specifically, as shown in fig. 1-3, the outer end of the condensing tube 4 is welded with the condensing fins 5 which are distributed horizontally and equidistantly, the condensing fins 5 are made of copper materials, the height of each condensing fin 5 is 12mm, the thickness of each condensing fin is 0.5mm, the distance between every two adjacent condensing fins 5 is 3mm, and the condensing fins 5 and the condensing tube 4 are welded by laser, so that the water catching area of the water vapor catching device can be effectively increased.

Specifically, as shown in fig. 5, the open end of the condenser tube 4 is connected with a corrugated tube 7 for the liquid nitrogen to enter and exit through a flange 6, the corrugated tube 7 plays a heat insulation role, and can also compensate partial heat expansion and cold contraction amount and installation angle errors of the liquid nitrogen tube, and the inlet and the outlet are in a detachable mode, so that the detachment can be completed only by detaching screws on the flange 6.

The previous description of the embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.