Multi-way valve, propellant pressurization and delivery system and control method

Abstract

This invention relates to the field of aerospace propulsion technology, providing a multi-port valve, a propellant pressurization and delivery system, and a control method. The multi-port valve includes a valve housing, a valve assembly, and a locking component. The valve housing forms a first fluid chamber and a valve cavity. A main flow path and multiple valve cavities are connected to opposite sides of the first fluid chamber. A portion of each valve cavity has a branch flow path, and another portion has a bypass flow path. The valve assembly is disposed within each valve cavity and includes a retractable valve core. The valve core has an end face facing the first fluid chamber and a stepped surface located in the middle of the valve core. A second fluid chamber is formed between the stepped surface and the valve cavity, and the second fluid chamber is connected to the branch flow path. The valve assembly is used to control the flow path opening and closing. The locking component is used to keep the valve assembly in a conducting state. This invention uses a multi-port valve with a locking function, which can greatly simplify the structure of the propellant pressurization and delivery system, reduce production costs, achieve centralized control and maintenance, and improve system reliability.

Description

Technical Field

[0001] This invention relates to the field of aerospace power technology, and in particular to a multi-way valve, a propellant pressurization and delivery system, and a control method. Background Technology

[0002] During launch vehicle flight, a liquid orbital attitude control propulsion system is generally used to control the attitude and acceleration of the rocket's stage. This system includes a propellant pressurization and delivery system, which typically comprises a pressurization device to provide pressurizing gas and two or more parallel surface tension tanks for storing the rocket's liquid propellant. Currently, propellant pressurization and delivery systems use various types of valves installed in the pressurization gas path and liquid outlet path of each surface tension tank for control. These valves are generally diaphragm valves, electro-explosive valves, or gas-explosive valves, resulting in a complex structure, numerous and disorganized connection points, difficulty in centralized control and maintenance, and low system reliability. Summary of the Invention

[0003] This invention provides a multi-way valve, a propellant pressurization and delivery system, and a control method. The multi-way valve is a piston-type valve with a locking function, which can realize multiple functions such as individual filling of each surface tension tank, reliable opening of branch and bypass paths when the pressurization and delivery system is working, and normal flow of medium when the pressurization and delivery system is working. It can also greatly simplify the system structure, reduce production costs, achieve centralized control and maintenance, and improve system reliability.

[0004] This invention provides a multi-way valve for use in a propellant pressurization and delivery system, the multi-way valve comprising:

[0005] The valve housing has a first fluid chamber and a valve chamber. The first fluid chamber has a main flow path and a plurality of valve chambers connected to opposite sides. A portion of the plurality of valve chambers is provided with a branch flow path, and another portion is provided with a bypass flow path.

[0006] A valve assembly is disposed within each of the valve chambers. The valve assembly includes a retractable valve core, the valve core having an end face facing the first fluid chamber and a stepped surface located in the middle of the valve core. A second fluid chamber is formed between the stepped surface and the valve chamber. The second fluid chamber is in communication with the branch flow path. The valve assembly is used to control the flow path opening and closing between the branch flow path and the main flow path, as well as the flow path opening and closing between the multiple bypass paths.

[0007] A locking component is disposed on the valve housing and corresponds one-to-one with the valve group, used to keep the valve group in a conducting state.

[0008] According to a multi-way valve provided by the present invention, a receiving chamber is formed on the side wall of the valve housing, the receiving chamber being located on the movement path of the valve core, and the locking assembly includes:

[0009] A gland, threadedly fitted into the receiving chamber;

[0010] A locking pin is disposed in the receiving cavity in a radially movable manner along the valve core, with the first end of the locking pin penetrating the gland and the second end of the locking pin adapted to extend into the valve housing to lock the valve core.

[0011] The first elastic element is sleeved on the locking pin and abuts against the second end of the pressure cap and the locking pin.

[0012] According to the present invention, a multi-way valve is provided, wherein the valve core is provided with a locking groove, and the valve core is adapted to switch between a first position and a second position.

[0013] In the first position, the locking groove of the valve core engages with the second end of the locking pin, and the flow path between the branch path and the main path, as well as the flow path between the multiple bypass paths, remains open; in the second position, the locking groove of the valve core separates from the second end of the locking pin, and the flow path between the branch path and the main path, as well as the flow path between the multiple bypass paths, is disconnected.

[0014] According to a multi-way valve provided by the present invention, the second end of the locking pin is provided with an abutment portion, the first elastic member abuts between the pressure cap and the abutment portion, and the end face of the second end of the locking pin is an inclined surface that cooperates with the valve core.

[0015] According to a multi-way valve provided by the present invention, the valve assembly further includes:

[0016] The piston rod is slidably disposed within the valve housing and connected to the valve core;

[0017] The second elastic element is sleeved on the piston rod and abuts against the valve core and the valve cavity.

[0018] According to a multi-way valve provided by the present invention, multiple valve groups are arranged in parallel to each other, and multiple branch paths and multiple bypass paths are respectively vertically distributed on both sides of the valve body.

[0019] According to a multi-port valve provided by the present invention, each of the branch paths is provided with a filling chamber, and the filling chamber is provided with a filling discharge valve assembly, the filling discharge valve assembly comprising:

[0020] A filling valve core is disposed in the filling chamber and has a filling flow channel communicating with the branch path;

[0021] A plug is detachably disposed within the filling chamber to seal the filling valve core.

[0022] According to a multi-way valve provided by the present invention, the first fluid chamber is connected to a detection connector for detecting sealing performance.

[0023] The present invention also provides a propellant pressurization and delivery system, comprising: a pressurization device, a plurality of surface tension storage tanks connected in parallel, and the aforementioned multi-way valve, wherein the multi-way valve comprises a first multi-way valve and a second multi-way valve;

[0024] The main flow path of the first multi-way valve is connected to the booster device, the air inlet of each surface tension tank is connected to the branch flow path and the bypass flow path of the first multi-way valve, and the liquid outlet of each surface tension tank is connected to the branch flow path and the bypass flow path of the second multi-way valve. The main flow path of the second multi-way valve is connected to the engine.

[0025] The present invention also provides a control method for the above-mentioned propellant pressurization and delivery system, comprising:

[0026] Obtain delivery instructions;

[0027] The pressurizing device introduces pressurizing gas into the main flow path of the first multi-way valve according to the delivery command, so that the flow paths between the multiple branch paths and the main flow path of the first multi-way valve and the multiple bypass paths are connected, and the connection is maintained by the locking component of the first multi-way valve. The pressurizing gas enters the multiple surface tension tanks and is pressurized synchronously.

[0028] Obtain real-time pressure values ​​within multiple surface tension tanks;

[0029] When the real-time pressure values ​​in the multiple surface tension tanks reach the preset pressure value, the flow paths between the multiple branch paths and the main flow path of the second multi-way valve, as well as the flow paths between the multiple bypass paths, are opened and kept open by the locking component of the second multi-way valve. The propellant in the multiple surface tension tanks is discharged synchronously through the main flow path of the second multi-way valve.

[0030] The multi-way valve, propellant pressurization and delivery system, and control method provided by this invention form a first fluid chamber and a valve cavity in the valve shell of the multi-way valve. A main flow path and multiple valve cavities are connected to opposite sides of the first fluid chamber. A portion of each valve cavity is provided with a branch flow path, and another portion is provided with a bypass flow path, facilitating connection to the propellant pressurization and delivery system. A valve assembly is disposed within each valve shell. The valve assembly includes a retractable valve core with an end face facing the first fluid chamber and a stepped surface located in the middle of the valve core. A second fluid chamber is constructed between the stepped surface and the valve cavity. The second fluid chamber is connected to the branch flow path, allowing control of the flow path connection between the branch flow path and the main flow path, as well as the flow path connection between the multiple bypass flow paths. A locking assembly is disposed in the valve shell and corresponds one-to-one with the valve assembly, ensuring that the valve assembly remains in a conductive state and guaranteeing normal medium flow during system operation. Therefore, the present invention employs a multi-way valve with a locking function, which can realize multiple functions such as reliable opening of branch and bypass paths when the booster conveying system is working, and normal flow of medium when the booster conveying system is working. It can also greatly simplify the system structure, reduce production costs, achieve centralized control and maintenance, and improve system reliability. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this invention or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is one of the structural schematic diagrams of the multi-way valve provided by the present invention;

[0033] Figure 2 This is the second schematic diagram of the structure of the multi-way valve provided by the present invention;

[0034] Figure 3 yes Figure 2 AA-direction cross section;

[0035] Figure 4 yes Figure 3 A magnified view of section B;

[0036] Figure 5 yes Figure 3 A magnified view of a portion at point C;

[0037] Figure 6 yes Figure 2 DD-direction cross-section;

[0038] Figure 7 This is the third schematic diagram of the multi-way valve provided by the present invention;

[0039] Figure 8 yes Figure 7 EE-directed cross-section;

[0040] Figure 9 This is a schematic diagram of the propellant pressurization and delivery system provided by the present invention;

[0041] Figure 10 This is a flowchart illustrating the control method of the propellant pressurization and delivery system provided by the present invention;

[0042] Figure 11 This is a schematic diagram of the propellant loading process of the propellant pressurization and delivery system provided by the present invention.

[0043] Figure label:

[0044] 100: Surface tension tank; 200: First multi-way valve; 300: Second multi-way valve;

[0045] 1: Valve housing; 101: First fluid chamber; 102: Main flow path; 103: Branch flow path;

[0046] 104: Bypass passage; 105: Receptacle chamber; 106: Filling chamber; 107: Test connector;

[0047] 2: Valve assembly; 201: Valve core; 2011: End face; 2012: Stepped surface;

[0048] 2013: Second fluid chamber; 202: Locking groove; 203: Piston rod;

[0049] 204: Second elastic element; 205: First sealing ring;

[0050] 3: Locking assembly; 301: Pressure cap; 302: Locking pin; 303: First elastic element;

[0051] 304: Abutment part; 305: Inclined surface;

[0052] 4: Filling and draining valve assembly; 401: Filling valve core; 402: Plug; 403: Filling flow channel;

[0053] 404: Second sealing ring;

[0054] 5: End cap. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0056] In the description of the embodiments of the present invention, it should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] The following is combined Figures 1-11 The present invention describes a multi-way valve, a propellant pressurization and delivery system, and a control method thereof.

[0060] According to an embodiment of the first aspect of the present invention, referring to Figures 1-9As shown, the multi-port valve provided by this invention is used in a propellant pressurization and delivery system. The multi-port valve mainly includes: a valve housing 1, a valve assembly 2, and a locking component 3. The valve housing 1 has a first fluid chamber 101 for the flow of media such as gas and liquid, and a valve chamber for mounting the valve assembly 2. The first fluid chamber 101 has a main flow path 102 connecting to multiple valve chambers on opposite sides. A portion of the multiple valve chambers is provided with a branch flow path 103, and another portion of the multiple valve chambers is provided with a bypass flow path 104, facilitating connection to the propellant pressurization and delivery system, as detailed later. It is understood that the number of branch flow paths 103 and bypass flow paths 104 is the same as the number of surface tension tanks 100 in the propellant pressurization and delivery system.

[0061] Reference Figure 3 , Figure 5 and Figure 6 As shown, valve assembly 2 is disposed in the valve cavity of each valve housing 1, and valve assembly 2 is located between each branch path 103 and the first fluid chamber 101 and between each bypass path 104 and the first fluid chamber 101. That is, each branch path 103 and each bypass path 104 are respectively provided with valve assembly 2. Valve assembly 2 includes a retractable valve core 201. Valve core 201 is generally stepped shaft shaped. Valve core 201 has an end face 2011 facing the first fluid chamber 101 and a stepped surface 2012 located in the middle of valve core 201. A second fluid chamber 2013 is constructed between the stepped surface 2012 and the valve cavity. The second fluid chamber 2013 is connected to the branch path 103. Valve assembly 2 is mainly used to control the flow path opening and closing between the branch path 103 and the main flow path 102 and the flow path opening and closing between multiple bypass paths 104. The stepped surface 2012 has a partially inclined surface that slopes toward the branch path 103 to facilitate the formation of an opening that communicates with the branch path 103, so as to facilitate the flow of the medium in the second fluid chamber 2013.

[0062] It should be noted that when the main flow path 102 is used as the medium inlet, the medium flows into the first fluid chamber 101 through the main flow path 102, generating an axial thrust that acts on the end face 2011 of the valve core 201, pushing the valve core 201 open. Then, it flows into the branch path 103 and the bypass path 104 respectively through the second fluid chamber 2013, and then is discharged, thereby realizing the connection between the branch path 103 and the main flow path 102, as well as the flow path between the multiple bypass paths 104. When the branch path 103 and the bypass path 104 are used as the medium inlets, the medium flows into the corresponding second fluid chamber 2013, generating an axial thrust that acts on the stepped surface 2012 of the valve core 201, pushing the valve core 201 open. Then, it flows into the first fluid chamber 101, and is discharged through the main flow path 102, thereby realizing the connection between the branch path 103 and the main flow path 102, as well as the flow path between the multiple bypass paths 104. Therefore, the multi-way valve of the present invention can be used simultaneously at the air inlet and liquid outlet of the surface tension tank 100 installed in the propellant pressurization and delivery system, thereby further simplifying the system structure and facilitating control and maintenance.

[0063] Furthermore, when the valve core 201 of the valve group 2 corresponding to the branch path 103 moves to the point where the flow path between the branch path 103 and the main flow path 102 is disconnected, the valve group 2 corresponding to the branch path 103 mainly plays the role of isolation, and is called the isolation valve group. It can isolate the pressurized gas of the pressurization device in the propellant pressurization and delivery system from the propellant in the surface tension tank 100, or isolate the propellant in the surface tension tank 100 from the engine.

[0064] Due to factors such as the internal resistance of each surface tension tank 100 and the length of the connecting pipelines, the pressure inside each surface tension tank 100 may differ, preventing the propellant from being discharged synchronously. Therefore, when the valve core 201 of the valve group 2 corresponding to the bypass passage 104 moves to connect the flow paths between the multiple bypass passages 104, the pressure inside each surface tension tank 100 can be made equal, thus ensuring the synchronous discharge of propellant from each surface tension tank 100. At this time, the valve group 2 corresponding to the bypass passage 104 mainly serves to connect the various surface tension tanks 100 and is called the connecting valve group.

[0065] Locking component 3 is disposed on valve body 1, and locking component 3 corresponds one-to-one with valve group 2. It is used to keep valve group 2 in the conducting state, so that branch path 103 and bypass path 104 can be opened stably and reliably when the booster conveying system is working, ensuring normal flow of medium when the booster conveying system is working.

[0066] Therefore, the embodiments of the present invention employ a multi-way valve with a locking function, which can reliably open the branch path 103 and the bypass path 104 when the booster conveying system is working, and ensure normal flow of the medium when the booster conveying system is working. It can also greatly simplify the system structure, reduce production costs, achieve centralized control and maintenance, and improve system reliability.

[0067] According to one embodiment of the present invention, referring to Figure 3 and Figure 4 As shown, a receiving chamber 105 is formed on the side wall of the valve housing 1. The receiving chamber 105 is located on the movement path of the valve core 201. The locking assembly 3 includes: a pressure cap 301, a locking pin 302, and a first elastic member 303. The pressure cap 301 is threaded onto the receiving chamber 105. The locking pin 302 is disposed within the receiving chamber 105 and is movably disposed along the radial direction of the valve core 201. The first end of the locking pin 302 passes through the pressure cap 301, and the second end of the locking pin 302 is adapted to extend into the valve housing 1 to lock the valve core 201. The first elastic member 303 is sleeved on the locking pin 302 and abuts against the pressure cap 301 and the second end of the locking pin 302. It is used to provide a preload force for the locking pin 302, and the preload force can be adjusted by screwing the pressure cap 301.

[0068] The specific type of the first elastic element 303 of the present invention is not particularly limited. For example, it can be a spring or an elastic sleeve.

[0069] According to one embodiment of the present invention, the valve core 201 is provided with a locking groove 202. The valve core 201 is adapted to switch between a first position and a second position. In the first position, the locking groove 202 of the valve core 201 is engaged with the second end of the locking pin 302, and the flow path between the branch path 103 and the main path 102 and the flow path between the multiple bypass paths 104 remain in a conductive state, realizing stable and reliable opening, thereby ensuring the normal flow of the medium and improving reliability. In the second position, the locking groove 202 of the valve core 201 is separated from the second end of the locking pin 302, and the flow path between the branch path 103 and the main path 102 and the flow path between the multiple bypass paths 104 are disconnected.

[0070] When the valve core 201 moves to the first position, i.e. the flow path is open, the valve core 201 pushes up the locking pin 302, and the second end of the locking pin 302 automatically engages in the locking groove 202 of the valve core 201 to achieve locking; by turning the pressure cap 301 of the locking assembly 3, the locking pin 302 can be disengaged from the locking groove 202 of the valve core 201, and the valve core 201 resets and moves to the second position, i.e. the flow path is closed. At this time, the multi-way valve is closed, and the operation is very convenient.

[0071] According to one embodiment, the second end of the locking pin 302 is provided with an abutment portion 304, the first elastic member 303 abuts between the pressure cap 301 and the abutment portion 304, and the end face of the second end of the locking pin 302 is an inclined surface 305 that cooperates with the valve core 201, which allows the locking pin 302 to slide quickly and smoothly into the locking groove 202 of the valve core 201, thereby improving the reliability of the system.

[0072] According to one embodiment of the present invention, referring to Figure 3 and Figure 6 As shown, valve assembly 2 further includes: a piston rod 203 and a second elastic element 204. The piston rod 203 is slidably disposed within valve housing 1 and connected to valve core 201; the second elastic element 204 is sleeved on piston rod 203 and abuts against valve core 201 and valve housing 1. It is understood that the end of valve housing 1 away from valve core 201 has a through hole, facilitating the extension and retraction of the end of piston rod 203 away from valve core 201. When locking pin 302 disengages from locking groove 202 of valve core 201, under the action of the second elastic element 204, valve core 201 automatically resets, closing the flow path.

[0073] The specific type of the second elastic element 204 of the present invention is not particularly limited. For example, it can be a spring or an elastic sleeve.

[0074] According to one embodiment of the present invention, the valve assembly 2 further includes two first sealing rings 205, which are disposed at both ends of the outer wall of the valve core 201. When the valve core 201 moves to the second position, i.e., the flow path is closed, the two first sealing rings 205 of the valve assembly 2 corresponding to the branch path 103 are respectively located on both sides of the branch path 103 and the second fluid chamber 2013, thereby achieving a seal. Figure 3 As shown; and, the two first sealing rings 205 corresponding to the bypass passage 104 and the valve group 2 are respectively located on both sides of the bypass passage 104 and the second fluid chamber 2013 to achieve sealing, as shown. Figure 6 As shown. Through the above design, the reliability of the entire valve body can be improved in this embodiment of the invention.

[0075] According to one embodiment of the present invention, multiple valve groups 2 are arranged in parallel to each other, and multiple branch paths 103 and multiple bypass paths 104 are respectively vertically distributed on both sides of the valve body 1. This design can reduce the overall volume of the multi-way valve, which is beneficial for miniaturization design.

[0076] According to one embodiment of the present invention, referring to Figure 7 and Figure 8As shown, each branch path 103 is provided with a filling chamber 106, and a filling and drain valve assembly 4 is provided in the filling chamber 106. The filling and drain valve assembly 4 includes a filling valve core 401 and a plug 402. The filling valve core 401 is disposed in the filling chamber 106 and has a filling flow channel 403 communicating with the branch path 103. The plug 402 is detachably disposed in the filling chamber 106 and is used to seal the filling valve core 401. By setting up the filling and drain valve assembly 4, each surface tension tank 100 can be individually filled. Specifically, when it is necessary to fill the surface tension tank 100 with propellant, the plug 402 is removed, the filling pipeline is connected, and the surface tension tank 100 can be filled with propellant. The propellant enters the branch path 103 of the valve housing 1 through the filling flow channel 403 of the filling valve core 401, and then flows into the surface tension tank 100, which is very convenient to use.

[0077] Furthermore, a second sealing ring 404 is provided between the plug 402 and the inner wall of the filling chamber 106 to improve the sealing performance of the valve body, thereby improving reliability.

[0078] According to one embodiment of the present invention, referring to Figure 1 As shown, the first fluid chamber 101 is connected to a test connector 107, which is used to test the sealing performance of the entire valve body, thereby improving reliability.

[0079] According to one embodiment of the present invention, referring to Figure 1 and Figure 3 As shown, the multi-way valve of the present invention further includes: an end cap 5, which is detachably connected to the end of the valve housing 1 away from the main flow path 102, and the end cap 5 is detachably connected to the end of the plurality of piston rods 203 away from the valve core 201. When the multi-way valve is in use, the end cap 5 is removed to allow the valve core 201 to move; when the multi-way valve is not in use, the end cap 5 is put on for sealing to ensure that the multi-way valve is in the closed state.

[0080] According to an embodiment of the second aspect of the present invention, referring to Figure 9 As shown, the present invention also provides a propellant pressurization and delivery system, mainly comprising: a pressurization device, multiple surface tension tanks 100 connected in parallel, and a multi-way valve as described in the above embodiment. The multi-way valve includes a first multi-way valve 200 and a second multi-way valve 300 with identical structures. The main flow path 102 of the first multi-way valve 200 is connected to the pressurization device. The air inlet of each surface tension tank 100 is connected to the branch flow path 103 and the bypass flow path 104 of the first multi-way valve 200, and the liquid outlet of each surface tension tank 100 is connected to the branch flow path 103 and the bypass flow path 104 of the second multi-way valve 300. The main flow path 102 of the second multi-way valve 300 is connected to the engine.

[0081] The propellant pressurization and delivery system of this invention employs a piston-type multi-way valve with a locking function, which enables multiple functions such as individual filling of each surface tension tank 100, reliable opening of the branch path 103 and bypass path 104 when the pressurization and delivery system is working, and normal flow of the medium when the pressurization and delivery system is working. Furthermore, all connection points of each surface tension tank 100 are connected to two valve bodies, which can greatly simplify the system structure, reduce production costs, achieve centralized control and maintenance, and improve system reliability.

[0082] According to an embodiment of the third aspect of the present invention, referring to Figure 10 As shown, the present invention also provides a control method for the propellant pressurization and delivery system of the above embodiments, mainly including: a propellant pressurization and delivery step, the propellant pressurization and delivery step including:

[0083] Obtain delivery instructions;

[0084] The pressurizing device introduces pressurizing gas into the main flow path 102 of the first multi-way valve 200 according to the delivery command. The pressurizing gas can be 3.0MPa helium gas, which opens the valve core 201 of the first multi-way valve 200, so that the flow paths between the multiple branch paths 103 and the main flow path 102 of the first multi-way valve 200 and the flow paths between the multiple bypass paths 104 are connected, and the connection is maintained by the locking component 3 of the first multi-way valve 200. The pressurizing gas enters the multiple surface tension storage tanks 100 and is pressurized synchronously.

[0085] Obtain real-time pressure values ​​within multiple surface tension tanks 100;

[0086] When the real-time pressure values ​​in the multiple surface tension tanks 100 reach the preset pressure values, the valve core 201 of the second multi-way valve 300 is opened, and the flow paths between the multiple branch paths 103 and the main flow path 102 of the second multi-way valve 300 and the flow paths between the multiple bypass paths 104 are connected. The connection is maintained by the locking component 3 of the second multi-way valve 300, and the propellant in the multiple surface tension tanks 100 is discharged synchronously through the main flow path 102 of the second multi-way valve 300 and enters the engine.

[0087] Furthermore, referring to Figure 11 As shown, taking two surface tension tanks 100 as an example, the control method of the propellant pressurization and delivery system of the present invention further includes: a propellant loading step, which includes:

[0088] Remove the plug 402 from the first refueling drain valve assembly 4, connect the refueling pipeline, and refuel the first surface tension tank 100 with propellant. After the propellant refueling of the first surface tension tank 100 is completed, remove the plug 402 from the second refueling drain valve assembly 4, connect the refueling pipeline, and refuel the second surface tension tank 100 with propellant. The propellant refueling of the second surface tension tank 100 is completed.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-way valve, characterized in that, The multi-way valve is used in a propellant pressurization and delivery system, and the multi-way valve includes: The valve housing has a first fluid chamber and a valve chamber. The first fluid chamber has a main flow path and a plurality of valve chambers connected to opposite sides. A portion of the plurality of valve chambers is provided with a branch flow path, and another portion is provided with a bypass flow path. A valve assembly is disposed within each of the valve chambers. The valve assembly includes a retractable valve core, the valve core having an end face facing the first fluid chamber and a stepped surface located in the middle of the valve core. A second fluid chamber is formed between the stepped surface and the valve chamber. The second fluid chamber is in communication with the branch flow path. The valve assembly is used to control the flow path opening and closing between the branch flow path and the main flow path, as well as the flow path opening and closing between the multiple bypass paths. A locking component is disposed on the valve housing and corresponds one-to-one with the valve group, used to keep the valve group in a conducting state.

2. The multi-way valve according to claim 1, characterized in that, The valve housing has a receiving chamber formed on its side wall, the receiving chamber being located on the movement path of the valve core, and the locking assembly includes: A gland, threadedly fitted into the receiving chamber; A locking pin is disposed in the receiving cavity in a radially movable manner along the valve core, with the first end of the locking pin penetrating the gland and the second end of the locking pin adapted to extend into the valve housing to lock the valve core. The first elastic element is sleeved on the locking pin and abuts against the second end of the pressure cap and the locking pin.

3. The multi-way valve according to claim 2, characterized in that, The valve core is provided with a locking groove, and the valve core is adapted to switch between a first position and a second position. In the first position, the locking groove of the valve core engages with the second end of the locking pin, and the flow path between the branch path and the main path, as well as the flow path between the multiple bypass paths, remains open; in the second position, the locking groove of the valve core separates from the second end of the locking pin, and the flow path between the branch path and the main path, as well as the flow path between the multiple bypass paths, is disconnected.

4. The multi-way valve according to claim 3, characterized in that, The second end of the locking pin is provided with an abutment portion, the first elastic element abuts between the pressure cap and the abutment portion, and the end face of the second end of the locking pin is an inclined surface that cooperates with the valve core.

5. The multi-way valve according to any one of claims 1-4, characterized in that, The valve assembly also includes: The piston rod is slidably disposed within the valve housing and connected to the valve core; The second elastic element is sleeved on the piston rod and abuts against the valve core and the valve cavity.

6. The multi-way valve according to claim 5, characterized in that, The valve assemblies are arranged in parallel to each other, and the branch paths and bypass paths are respectively distributed perpendicularly on both sides of the valve body.

7. The multi-way valve according to any one of claims 1-4, characterized in that, Each of the aforementioned branch paths is provided with a filling chamber, and the filling chamber is provided with a filling and drain valve assembly, the filling and drain valve assembly comprising: A filling valve core is disposed in the filling chamber and has a filling flow channel communicating with the branch path; A plug is detachably disposed within the filling chamber to seal the filling valve core.

8. The multi-way valve according to any one of claims 1-4, characterized in that, The first fluid chamber is connected to a test connector for testing the sealing performance.

9. A propellant pressurization and delivery system, characterized in that, include: A pressurizing device, multiple parallel surface tension tanks, and a multi-way valve according to any one of claims 1-8, wherein the multi-way valve includes a first multi-way valve and a second multi-way valve; The main flow path of the first multi-way valve is connected to the booster device, the air inlet of each surface tension tank is connected to the branch flow path and the bypass flow path of the first multi-way valve, and the liquid outlet of each surface tension tank is connected to the branch flow path and the bypass flow path of the second multi-way valve. The main flow path of the second multi-way valve is connected to the engine.

10. A control method for a propellant pressurization and delivery system according to claim 9, characterized in that, include: Obtain delivery instructions; The pressurizing device introduces pressurizing gas into the main flow path of the first multi-way valve according to the delivery command, so that the flow paths between the multiple branch paths and the main flow path of the first multi-way valve and the multiple bypass paths are connected, and the connection is maintained by the locking component of the first multi-way valve. The pressurizing gas enters the multiple surface tension tanks and is pressurized synchronously. Obtain real-time pressure values ​​within multiple surface tension tanks; When the real-time pressure values ​​in the multiple surface tension tanks reach the preset pressure value, the flow paths between the multiple branch paths and the main flow path of the second multi-way valve, as well as the flow paths between the multiple bypass paths, are opened and kept open by the locking component of the second multi-way valve. The propellant in the multiple surface tension tanks is discharged synchronously through the main flow path of the second multi-way valve.

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