Plate-Mesh Composite Microgravity Fluid Full Management Device and Assembly Method

Abstract

The present invention provides a plate-mesh composite microgravity fluid full management device and an assembly method in the field of microgravity liquid management technology. The management device includes a liquid collection and retention component, a liquid guiding component, a gas discharge component, and a fixed connection component. The liquid collection and retention component and the connection seat are respectively located at the top and bottom of the management device. The liquid guiding components are circumferentially evenly distributed along the connection axis of the liquid collection and retention component and the connection seat, and are respectively fixedly connected to the anti-slosh plate and the connection seat through self-locking screw connection components at the bottom, the middle-lower part, and the top of the device. The liquid collection and retention component is welded to the liquid guiding component, and the gas discharge component is welded to the connection seat. The liquid collection and retention component and the liquid guiding component can achieve pure liquid supply under the maneuvering overload conditions in all directions of the spacecraft. The gas discharge component can achieve gas discharge and liquid blocking before the air cushion pressure reduction and replenishment of the storage container. The fixed connection component can effectively improve the overload resistance ability of the management device during the launch section of the carrier rocket.

Description

Technical Field

[0001] The present invention relates to the technical field of microgravity liquid management. Specifically, it relates to a plate-mesh composite microgravity fluid full management device and an assembly method. Background Art

[0002] As one of the key technologies in space engineering, microgravity fluid management technology is widely applied to the four major systems of space vehicles: propulsion system, thermal control system, environmental control and life support system, and power supply system. Among them, gas-liquid separation and acquisition technology is the core of microgravity management technology. For example, in the propulsion system, the storage and supply of propellants require that the propellants delivered to the engine are gas-free and have sufficient flow rate; in the environmental control and life support system, the storage and supply of drinking water need to ensure water / gas isolation and safe water supply. Management devices based on the principle of surface tension are widely used in microgravity fluid management of various systems of spacecraft due to their characteristics such as small structural mass, good compatibility with liquid media, no moving parts, long service life, reusable, and high drainage efficiency.

[0003] With the rapid development of space exploration activities of spacecraft, surface tension management devices are also facing new challenges. For example, more stringent weight reduction requirements, pure fluid supply during rapid maneuvering overload in all directions, on-orbit refueling requirements, high mechanical environment adaptability, etc. At present, the mesh-type surface tension management device can achieve pure fluid supply during rapid maneuvering overload in all directions without prior liquid sinking operation, and has strong mechanical environment adaptability, but this type of device has a large structural mass and is difficult to achieve the refueling function; although the plate-type surface tension management device has a small structural mass, it must perform liquid sinking operation before achieving pure fluid supply during rapid maneuvering overload in all directions, and has poor mechanical environment adaptability. At the same time, the widely used refueling method is air cushion compression, and this scheme is only applicable to the pressure-drop type system and cannot be applied to the constant-pressure type system.

[0004] In summary, the surface tension management devices in the prior art cannot simultaneously achieve weight reduction requirements, fluid supply under maneuvering overload in all directions, on-orbit refueling requirements, high mechanical environment adaptability, etc. Summary of the Invention

[0005] Aiming at the defects in the prior art, the purpose of the present invention is to provide a plate-mesh composite microgravity fluid full management device and an assembly method.

[0006] According to a plate-mesh composite microgravity fluid full management device provided by the present invention, it includes a liquid collection and retention component, a liquid guiding component, a gas discharge component, and a fixed connection component;

[0007] The liquid collection and retention component includes a bottom screen collector, an included angle screen collector, and a connecting pipe, and the fixed connection component includes a connection seat, an anti-slosh plate, and a self-locking screwing component;

[0008] The liquid collection and retention component is arranged at the bottom end of the plate-mesh composite microgravity fluid full management device, the connecting seat is arranged at the top end of the plate-mesh composite microgravity fluid full management device, and the liquid guiding component is circumferentially and uniformly arranged along the connecting axis of the liquid collection and retention component and the connecting seat;

[0009] The top, middle-lower part and bottom of the plate-mesh composite microgravity fluid full management device are fixedly connected to the connecting seat and the anti-slosh plate through the self-locking screwing component;

[0010] The liquid guiding component is connected to the liquid collection and retention component, and the gas discharge component is connected to the connecting seat;

[0011] The included angle screen collector is arranged at the top of the liquid collection and retention component, the bottom screen collector is arranged at the bottom of the liquid collection and retention component, and the included angle screen collector is connected to the bottom screen collector through the connecting pipe.

[0012] In some embodiments, the bottom screen collector, the included angle screen collector and the connecting pipe form a collection cavity;

[0013] Both the bottom screen collector and the included angle screen collector adopt sandwich structure components, and the sandwich structure components are composed of perforated plates and metal screens, and a single layer of the metal screen is arranged between two layers of perforated plates.

[0014] In some embodiments, the liquid collection and retention component further includes a gravity water tank, a water tank air release pipe and water tank blades, and the gravity water tank, the water tank air release pipe and the water tank blades form a retention cavity;

[0015] The gravity water tank is composed of an inverted conical cylinder body, an inward concave opening cover plate and a flat bottom plate, the profile of the water tank air release pipe is arranged to be consistent with the profile of the inward concave opening cover plate, the inner diameter of the water tank air release pipe is less than or equal to 4 mm, and multiple water tank blades adopt thin plate structures.

[0016] In some embodiments, slot convex platforms are arranged on the inner wall of the cylinder body of the gravity water tank, and the water tank blades are fixed on the inner wall of the cylinder body of the gravity water tank through the slot convex platforms;

[0017] A butting interface is arranged on the inward concave opening cover plate, and the water tank air release pipe is fixed on the inward concave opening cover plate through the butting interface;

[0018] Slots are arranged on both the inverted conical cylinder body and the flat bottom plate, and the liquid guiding component is fixed on the inverted conical cylinder body and the flat bottom plate through the slots.

[0019] In some embodiments, the liquid guiding component includes a whole-chamber flow guiding plate and a liquid-end flow guiding plate. Both the whole-chamber flow guiding plate and the liquid-end flow guiding plate adopt a porous plate structure, and the porosity of the porous plate structure is set to 40% - 60%.

[0020] The outer profiles of both the whole-chamber flow guiding plate and the liquid-end flow guiding plate are designed according to the inner profile of the spacecraft liquid storage and supply container, and a gap of 1 - 5 mm is maintained between both the whole-chamber flow guiding plate and the liquid-end flow guiding plate and the inner wall of the spacecraft liquid storage and supply container.

[0021] The height of the whole-chamber flow guiding plate is set to 0.95 - 1 times the height of the inner cavity of the spacecraft liquid storage and supply container, and the height of the liquid-end flow guiding plate is set to 2 - 3 times the height of the liquid collection and retention component.

[0022] In some embodiments, connection through-holes are provided on the connection surfaces of both the whole-chamber flow guiding plate and the liquid-end flow guiding plate, and the diameter of the connection through-holes exceeds the major diameter of the self-locking screw connection component by 1 - 1.5 mm.

[0023] In some embodiments, the gas discharge component includes an exhaust liquid-blocking pipe and a plug. The length of the exhaust liquid-blocking pipe is set to 0.3 - 0.5 times the height of the inner cavity of the spacecraft liquid storage and supply container, and through-holes with a diameter less than or equal to 2 mm are uniformly arranged in a circumferential array on the plug.

[0024] In some embodiments, the connection seat is circumferentially and uniformly provided with lugs for connecting the whole-chamber flow guiding plate. The anti-slosh plate adopts a fan-shaped ring structure, and the included angle on the anti-slosh plate is set to be the same as the included angle formed by the adjacent whole-chamber flow guiding plate and the liquid-end flow guiding plate.

[0025] In some embodiments, one end of the liquid guiding component is connected and arranged on the liquid collection and retention component, and the other end of the liquid guiding component is connected and arranged on the connection seat. The gas discharge component is connected and arranged at the central position of the connection seat.

[0026] An assembly method for the plate-and-mesh composite microgravity fluid full management device as described above includes the following steps:

[0027] Step 1: Manufacture relevant parts;

[0028] Step 2: Assemble each component constituting the collection and retention device, including:

[0029] Step 2-1: Weld the inverted conical cylinder, the flat bottom plate, and the water tank blades on the gravity water tank to form a water tank cylinder assembly;

[0030] Step 2-2: Weld the bottom screen collector, the included angle screen collector, the connecting pipe, and the water tank cylinder assembly together;

[0031] Step 2-3: Insert the water tank exhaust pipe into the upper cover plate slot of the gravity water tank, and weld the water tank exhaust pipe and the cover plate slot to form a water tank cover plate assembly;

[0032] Step 2-4: Weld the water tank cylinder assembly and the water tank cover plate assembly to form the liquid collection and retention assembly;

[0033] Step 3: Weld the exhaust liquid-blocking pipe and the plug to form the gas discharge assembly;

[0034] Step 4: Assemble the plate-mesh composite microgravity liquid full management device, including:

[0035] Step 4-1: Insert each part on the liquid guiding component into each slot on the liquid collection and retention component, and at the same time connect and fix each part through the self-locking screwing component, and at the same time spot weld at the connection of each part to form a welded assembly;

[0036] Step 4-2: Weld the gas discharge assembly and the welded assembly to form the plate-mesh composite microgravity liquid full management device.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. By respectively arranging an angle screen collector and a bottom screen collector at the top and bottom of the liquid collection and retention component and connecting them through a connecting pipe, the present invention effectively solves the problem that the existing plate-type management device cannot supply liquid under the condition of all-directional maneuvering overload without prior liquid sinking operation, and at the same time has a lighter structural weight than the existing mesh-type surface tension management device that can achieve the above functions;

[0039] 2. By arranging a gas discharge assembly at the top of the management device, the present invention can realize the gas discharge in the cavity when the liquid remaining amount in the liquid storage and supply container of the spacecraft is small, so as to perform air cushion pressure reduction and supplementary addition subsequently, effectively solving the problem that the current surface tension management device can only adopt the air cushion compression supplementary addition method, and expanding the selectivity of the supplementary addition scheme of this type of management device;

[0040] 3. By arranging slot bosses on the relevant parts of the liquid collection and retention component and setting horizontal or vertical connection surfaces for the liquid guiding component to realize threaded connection or spot welding connection between management devices, the present invention can realize the rapid installation of the management device and at the same time improve the mechanical environment adaptability of the management device. Description of the Drawings

[0041] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more obvious:

[0042] Figure 1 This is a schematic structural view of the plate - mesh composite microgravity liquid full - management device of the present invention;

[0043] Figure 2 This is a partially enlarged schematic structural view of the plate - mesh composite microgravity liquid full - management device of the present invention.

[0044] Reference numerals:

[0045] Liquid collection and retention component 1, liquid - end guide plate 22

[0046] Gravity water tank 11, gas discharge component 3

[0047] Water - tank gas discharge pipe 12, exhaust liquid - blocking pipe 31

[0048] Water - tank blade 13, plug 32

[0049] Bottom screen collector 14, fixed connection component 4

[0050] Angle screen collector 15, connecting seat 41

[0051] Communication pipe 16, anti - sloshing plate 42

[0052] Liquid guiding component 2, self - locking screw connection component 43

[0053] Integral cavity guide plate 21 Specific implementation mode

[0054] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0055] Embodiment 1

[0056] As Figure 1-2 shown, the present invention provides a plate - mesh composite microgravity liquid full - management device that can perform on - orbit air - cushion pressure reduction and refueling, supply pure liquid under various rapid overload conditions in all directions, and has high mechanical environment adaptability, including a liquid collection and retention component 1, a liquid guiding component 2, a gas discharge component 3, and a fixed connection component 4.

[0057] The liquid collection and retention component 1 includes a gravity water tank 11, a water - tank gas discharge pipe 12, a water - tank blade 13, a bottom screen collector 14, an angle screen collector 15, and a communication pipe 16. The liquid guiding component 2 includes an integral cavity guide plate 21 and a liquid - end guide plate 22. The gas discharge component 3 includes an exhaust liquid - blocking pipe 31 and a plug 32. The fixed connection component 4 includes a connecting seat 41, an anti - sloshing plate 42, and a self - locking screw connection component 43.

[0058] The liquid collection and retention component 1 and the connecting seat 41 are respectively located at the bottom end and the top end of the device, and the liquid guiding component 2 is circumferentially and uniformly arranged along the connecting axis of the liquid collection and retention component 1 and the connecting seat 41. The top, the middle-lower part and the bottom of the plate-web composite microgravity fluid full management device are fixedly connected to the connecting seat and the anti-slosh plate through the self-locking screwing components. The liquid collection and retention component 1 and the liquid guiding component 2 are connected by welding, and the gas venting component 3 and the connecting seat 41 are connected by welding.

[0059] Specifically, in this embodiment, the gravity water tank 11, the water tank gas discharge pipe 12 and the water tank blades 13 in the liquid collection and retention component 1 form a retention cavity, where: the gravity water tank 11 is composed of an inverted conical cylinder, an inwardly concave opening cover plate and a flat bottom plate, and the cone angle of the cylinder is 40°. The profile of the water tank gas discharge pipe 12 is arranged to be consistent with the profile of the inwardly concave opening cover plate, and the inner diameter of the pipe of the water tank gas discharge pipe 12 is 2 mm. The water tank blades 13 are of thin plate structure, and the number is 4.

[0060] Specifically, in this embodiment, the bottom screen collector 14, the included angle screen collector 15 and the connecting pipe 16 form a non-air-entraining collection cavity, where: both the bottom screen collector 14 and the included angle screen collector 15 are sandwich structure components composed of a perforated plate and a metal screen, and the inner diameter of the pipe of the connecting pipe 16 is 10 mm.

[0061] Specifically, in this embodiment, a slot boss for fixing the water tank blades 13 is arranged on the inner wall of the cylinder of the gravity water tank 11, a butt joint for fixing the water tank gas discharge pipe 12 is arranged on the inwardly concave opening cover plate, and slots for fixing the liquid guiding component 2 are arranged on the inverted conical cylinder and the flat bottom plate.

[0062] Specifically, in this embodiment, the whole cavity flow guiding plate 21 and the liquid end flow guiding plate 22 are of porous plate structure, and the porosity is 50%. The outer profiles of the whole cavity flow guiding plate 21 and the liquid end flow guiding plate 22 are designed according to the inner profile of the spacecraft liquid storage and supply container, and a 3-mm gap is maintained between the whole cavity flow guiding plate 21 and the liquid end flow guiding plate 22 and the inner wall of the spacecraft liquid storage and supply container.

[0063] Specifically, in this embodiment, the height of the whole cavity flow guiding plate 21 is 0.95 times the height of the inner cavity of the spacecraft liquid storage and supply container, and the height of the liquid end flow guiding plate 22 is 2 times the height of the liquid collection and retention component 1.

[0064] Specifically, in this embodiment, connecting through holes are arranged on the connecting surfaces of the parts of the liquid guiding component 2, and the aperture of the connecting through holes exceeds the major diameter of the self-locking screwing component 43 by 1 mm.

[0065] Specifically, in this embodiment, the length of the exhaust liquid-blocking pipe 31 is taken as 0.5 times the inner cavity height of the spacecraft liquid storage and supply container, and through holes with a diameter of 1 mm are evenly distributed in a circumferential array on the plug 32.

[0066] Specifically, in this embodiment, the connecting seats 41 are evenly distributed circumferentially for connecting the lugs on the integral cavity baffle plate 21. The anti-slosh plate 42 has a fan-shaped ring structure, and the included angle of the anti-slosh plate 42 is set to be the same as the included angle formed by two adjacent baffle plates, and the angle is taken as 30 degrees. Here, the baffle plate can be the integral cavity baffle plate 21 or the liquid end baffle plate 22.

[0067] The present invention also provides an assembly method for the above-mentioned plate and mesh composite microgravity liquid full management device, including the following steps:

[0068] Step 1: Manufacture relevant parts.

[0069] Step 2: Assemble the components constituting the collection and retention device 1, including:

[0070] Step 2-1: Weld and connect the inverted conical cylinder body, flat bottom plate and water tank blades 13 of the gravity water tank 11 to form a water tank cylinder body assembly.

[0071] Step 2-2: Weld and connect the bottom screen collector 14, included angle screen collector 15, connecting pipe 16 and the water tank cylinder body assembly obtained in Step 2-1.

[0072] Step 2-3: Insert the water tank air release pipe 12 into the cover plate slot of the gravity water tank 11, and at the same time weld and connect to form a water tank cover plate assembly.

[0073] Step 2-4: Weld and connect the water tank cylinder body assembly obtained in Step 2-2 and the water tank cover plate assembly obtained in Step 2-3 to form the collection and retention device 1.

[0074] Step 3: Weld the exhaust liquid-blocking pipe 31 and the plug 32 by high-energy beam to form the gas release component 3.

[0075] Step 4: Assemble the plate and mesh composite microgravity liquid full management device, including:

[0076] Step 4-1: Insert the parts of the liquid guiding component 2 into the slots of the liquid collection and retention component 1, and at the same time connect and fix the parts through the self-locking screw connection component 43, and at the same time spot weld at the joints of the parts to form a welded assembly.

[0077] Step 4-2: Weld and connect the gas release component 3 completed in Step 3 and the welded assembly completed in Step 4-1 to finally form the plate and mesh composite microgravity liquid full management device.

[0078] The liquid collection and retention component 1 and the liquid guiding component 2 can achieve pure liquid supply under various maneuvering overload conditions of the spacecraft. The gas venting component 3 can achieve gas venting and liquid blocking before the cushion pressure reduction and replenishment of the storage container. The fixed connection component 4 can effectively improve the overload resistance ability of the management device during the launch stage of the carrier.

[0079] Working principle

[0080] This plate - mesh composite microgravity liquid full - management device is installed inside the liquid storage and supply container of the spacecraft. The liquid storage and supply container of the spacecraft is a general component on the spacecraft, and the liquid storage and supply container of the spacecraft adopts a spherical - cylindrical closed container structure. The plate - mesh composite microgravity liquid full - management device is connected to the gas and liquid nozzles on the shell of the liquid storage and supply container of the spacecraft through the flat bottom plate of the gravity water tank 11 and the connecting seat 41 respectively.

[0081] Through the liquid collection and retention component 1 and the liquid guiding component 2, pure liquid supply of the spacecraft under various maneuvering overload conditions can be achieved, as follows:

[0082] When there is a positive maneuvering overload, the liquid in the inner cavity of the liquid storage and supply container of the spacecraft sinks to the liquid end. At this time, the retention cavity of the liquid collection and retention component 1 is completely immersed in the liquid. Under the action of the pressurized gas, the bottom screen collector 14 and the angled screen collector 15 immersed in the liquid collect the pure liquid into the collection cavity and discharge it from the container to achieve supply. At the same time, the liquid end deflector 22 in the liquid guiding component 2 deflects the remaining liquid at the liquid end of the storage and supply container to the liquid collection and retention component 1 to supplement the supplied liquid.

[0083] When there is a reverse maneuvering overload, most of the liquid in the inner cavity of the liquid storage and supply container of the spacecraft sinks to the gas end, but the liquid collection and retention component 1 uses the inverted conical cylinder and the concave - shaped opening cover plate of the gravity water tank 11 to hold the liquid in the retention cavity. Under the action of the pressurized gas, the angled screen collector 15 immersed in the liquid collects the pure liquid into the collection cavity and discharges it from the container to achieve supply. At the same time, the whole - cavity deflector 21 in the liquid guiding component 2 deflects the liquid at the gas end of the storage and supply container to the liquid collection and retention component 1 to supplement the supplied liquid.

[0084] When there is a lateral maneuvering overload, most of the liquid in the inner cavity of the liquid storage and supply container of the spacecraft sinks to one side of the container. At this time, part of the retention cavity of the liquid collection and retention component 1 is immersed in the liquid. Under the action of the pressurized gas, the bottom screen collector 14 and the angled screen collector 15 immersed in the liquid collect the pure liquid into the collection cavity and discharge it from the container to achieve supply. At the same time, the whole - cavity deflector 21 and the liquid end deflector 22 immersed in the liquid respectively deflect the liquid in other parts of the storage and supply container to the liquid collection and retention component 1 to supplement the supplied liquid.

[0085] Through the gas venting component 3, gas venting and liquid blocking before the cushion pressure reduction and replenishment of the storage container can be achieved, as follows:

[0086] When the liquid consumption of the liquid storage and supply container of the spacecraft exceeds 80%, most of the inner cavity of the container is occupied by gas at this time and is located in the central area of the container. At this time, the plug 32 transmits the gas into the exhaust liquid-blocking pipe 31 through its evenly distributed small holes and discharges it from the container. The liquid replenishment operation can be carried out until the air cushion pressure in the container is reduced to the specified value.

[0087] The fixed connection component 4 changes the spot welding connection method of the management device in the traditional liquid storage and supply container of the spacecraft to a screw connection method plus a spot welding connection method, which can effectively improve the overload resistance ability of the management device during the launch stage of the vehicle.

[0088] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0089] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A plate-net composite microgravity fluid management device, characterized in that: It comprises a liquid collecting and retaining component (1), a liquid guiding component (2), a gas releasing component (3) and a fixed connection component (4); The liquid collection and storage assembly (1) includes a bottom screen collector (14), an angled screen collector (15), and a connecting pipe (16); the fixed connection assembly (4) includes a connection seat (41), an anti-sway plate (42), and a self-locking screw assembly (43); The liquid collection and storage component (1) is arranged at the bottom end of the plate-net composite microgravity fluid full management device, the connecting seat (41) is arranged at the top end of the plate-net composite microgravity fluid full management device, and the liquid guide component (2) is uniformly distributed along the circumferential direction of the connection axis between the liquid collection and storage component (1) and the connecting seat (41); The top, middle and lower parts, and bottom of the plate-net composite microgravity fluid management device are fixedly connected to the connecting seat (41) and the anti-sway plate (42) via the self-locking screw connection assembly; The liquid guide assembly (2) is connected to the liquid collection and storage assembly (1), and the gas discharge assembly (3) is connected to the connection seat (41); The angled screen collector (15) is provided at the top of the liquid collecting and retaining component (1), the bottom screen collector (14) is provided at the bottom of the liquid collecting and retaining component (1), and the angled screen collector (15) is connected to the bottom screen collector (14) via the connecting pipe (16); The bottom screen collector (14), the angled screen collector (15), and the connecting pipe (16) form a collection chamber; The bottom screen collector (14) and the angled screen collector (15) both adopt a sandwich structure assembly, wherein the sandwich structure assembly is composed of a perforated plate and a metal screen, and a single layer of the metal screen is sandwiched between two layers of perforated plates; The liquid collection and storage assembly (1) further comprises a gravity water tank (11), a water tank vent pipe (12), and a water tank blade (13), wherein the gravity water tank (11), the water tank vent pipe (12), and the water tank blade (13) constitute a storage chamber; The gravity water tank (11) is composed of an inverted conical cylinder, an inwardly concave opening cover plate, and a flat bottom plate, and the profile of the water tank vent pipe (12) is arranged to be consistent with the profile of the inwardly concave opening cover plate.

2. The plate-net composite microgravity fluid management device according to claim 1, characterized in that: The inner diameter of the water tank air release pipe (12) is less than or equal to 4 mm, and the plurality of water tank blades (13) adopt a thin plate structure.

3. The plate-net composite microgravity fluid management device according to claim 1, characterized in that: A slot boss is provided on the inner wall of the cylinder of the gravity water tank (11), and the water tank blade (13) is fixed to the inner wall of the cylinder of the gravity water tank (11) via the slot boss; A docking port is provided on the inwardly concave opening cover plate, and the water tank vent pipe (12) is fixed to the inwardly concave opening cover plate through the docking port; Slots are provided on both the inverted conical cylinder and the flat bottom plate, and the liquid guide assembly (2) is fixed to the inverted conical cylinder and the flat bottom plate via the slots.

4. The plate-net composite microgravity fluid management device according to claim 1, characterized in that: The liquid guide assembly (2) comprises a whole cavity guide plate (21) and a liquid end guide plate (22), wherein both the whole cavity guide plate (21) and the liquid end guide plate (22) adopt a porous plate structure, and the porosity of the porous plate structure is set to 40% to 60%; The outer profiles of the whole cavity guide plate (21) and the liquid end guide plate (22) are designed according to the inner profile of the spacecraft liquid storage and supply container, and a gap of 1 to 5 mm is maintained between the whole cavity guide plate (21) and the liquid end guide plate (22) and the inner wall of the spacecraft liquid storage and supply container; The height of the whole cavity guide plate (21) is set to 0.95 to 1 times the height of the inner cavity of the spacecraft liquid storage and supply container, and the height of the liquid end guide plate (22) is set to 2 to 3 times the height of the liquid collection and retention component (1).

5. The plate-net composite microgravity fluid management device according to claim 4, characterized in that: The connecting surfaces of the whole cavity guide plate (21) and the liquid end guide plate (22) are both provided with connecting through holes, and the diameter of the connecting through holes exceeds the major diameter of the self-locking screw connection component (43) by 1 to 1.5 mm.

6. The plate-net composite microgravity fluid management device according to claim 4, characterized in that: The gas discharge assembly (3) comprises an exhaust and liquid blocking pipe (31) and a plug (32), wherein the length of the exhaust and liquid blocking pipe (31) is set to be 0.3 to 0.5 times the height of the inner cavity of the spacecraft liquid storage and supply container, and the plug (32) is uniformly provided with through holes with a diameter of less than or equal to 2 mm in a circumferential array.

7. The plate-net composite microgravity fluid management device according to claim 4, characterized in that: The connecting seat (41) is evenly distributed in the annular direction and is used to connect the upper ear piece of the whole cavity guide plate (21). The anti-sway plate (42) adopts a fan-shaped ring structure. The angle of the anti-sway plate (42) is set to be the same as the angle formed by two adjacent guide plates.

8. The plate-net composite microgravity fluid management device according to claim 1, characterized in that: One end of the liquid guide component (2) is connected to the liquid collection and storage component (1), and the other end of the liquid guide component (2) is connected to the connection seat (41). The gas discharge component (3) is connected to the center of the connection seat (41).

9. An assembly method for the plate-net composite microgravity fluid management device according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Manufacturing related parts; Step 2: Assemble the components that constitute the collection and retention device, including: Step 2-1: The inverted conical cylinder, the flat bottom plate, and the water trough blades (13) on the gravity water trough (11) are welded to each other to form a water trough cylinder assembly; Step 2-2: Welding the bottom screen collector (14), the angled screen collector (15), the connecting pipe (16), and the water tank barrel assembly to each other; Step 2-3: The water tank vent pipe (12) is inserted into the upper cover slot of the gravity water tank (11), and the water tank vent pipe (12) and the cover slot are welded to form a water tank cover assembly; Step 2-4: The water tank body assembly is welded to the water tank cover assembly to form the liquid collection and storage assembly (1); Step 3: The exhaust liquid blocking pipe (31) is welded to the plug (32) to form the gas discharge assembly (3); Step 4: Assemble the plate-net composite microgravity liquid management device, including: Step 4-1: inserting the components of the liquid guide assembly (2) into the slots of the liquid collection and storage assembly (1), and connecting and fixing the components by the self-locking screw assembly (43), and spot welding the connection points of the components to form a connection assembly; Step 4-2: The gas release assembly (3) is welded to the connection assembly to form the plate-net composite microgravity liquid full management device.

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