Arrow valve, connector, connector docking structure and docking process

Abstract

The present invention discloses an arrow valve, a connector, a connector docking structure and a docking process. The arrow valve comprises a first main body, a first flange and a second flange respectively connected to the first main body, the second flange is used to connect to the arrow pipeline, and the first flange is used to connect to the connector. The first flange and the second flange are respectively arranged at the two ends of the first main body, and the first flange is provided with a first positioning hole and a first fixing part, and the first fixing part is arranged on the outer surface of the first flange. A third flange is provided at one end of the connector, and the connector is used to connect to the arrow valve through the third flange. The third flange is provided with a second positioning hole and a second fixing part, and the second positioning holes are evenly distributed along the circumferential surface of the third flange, and the second positioning holes correspond one by one to the first positioning holes of the arrow valve. Compared with the prior art, it has the advantages of reasonable design, stable structure, convenient docking operation of the connector, and effective avoidance of cryogenic propellant leakage.

Description

Technical Field

[0001] The invention relates to the field of liquid rockets, and in particular to a rocket valve, a connector, a connector docking structure and a docking process. Background Art

[0002] With the rapid development of the aerospace industry, various technologies involved in the field of rockets have also achieved rapid progress. At present, rockets are the main means of transporting satellites into space. Therefore, continuously reducing the cost of rocket manufacturing and launching is the goal pursued by major commercial aerospace companies.

[0003] The cryogenic propellant filling and discharge connector is used to transport liquid propellant media such as liquid hydrogen, liquid oxygen, and liquid methane to the rocket. It can realize the connection, sealing, and detachment functions between the connector and the rocket liquid circuit interface. Before the rocket takes off, the connector needs to be detached in advance. If the rocket launch is delayed, the connector needs to be re-docked. In order to improve reliability, a connector detachment test is required before the rocket launch to determine whether the connector can be detached smoothly. After the detachment test is completed, the connector needs to be re-docked. In the above two cases, docking is performed when the rocket is in the upright state. The operating platform is high and the platform area is small. Therefore, the connector docking operation needs to be simple and the docking force is small to meet manual docking requirements.

[0004] In order to prevent cryogenic propellant leakage, two seals are set on the docking surface between the connector and the valve on the rocket. However, when the connector and the valve on the rocket are docked, the friction resistance of the two seals must be overcome. Often, manual docking cannot be used due to the large resistance. At present, the usual practice is to remove the connector from the cryogenic pipeline, remove the valve on the rocket from the rocket, dock the connector and the valve on the rocket on a press, and then dock the valve on the rocket with the rocket and the connector with the cryogenic pipeline, which makes the workload of disassembly and installation large.

[0005] The breakaway connector relies on a breaking bolt to connect the connector to the valve on the arrow. The diameter of the breaking part is very small to ensure reliable breaking. When assembling the breaking bolt, no external force or partial load should be applied to the breaking bolt to prevent the breaking part from being broken by external force, which increases the difficulty of operation. In addition, the docking surface between the connector and the valve on the arrow is provided with two sealing parts with a long mating surface. When the connector and the valve on the arrow are docked, the docking surface is often skewed, which may scratch the sealing surface and the seal, resulting in loose sealing and leakage of cryogenic propellant.

[0006] Therefore, how to provide a structure with reasonable design, stable structure, convenient operation, and effective prevention of cryogenic propellant leakage is a problem to be solved at present. Summary of the invention

[0007] The purpose of the present invention is to provide an arrow valve, a connector, a connector docking structure and a docking process, which have the advantages of reasonable design, stable structure, convenient operation, and can effectively avoid leakage of cryogenic propellant.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] An arrow valve comprises a first body, a first flange and a second flange respectively connected to the first body, wherein the second flange is used to connect to an arrow pipeline, and the first flange is used to connect to a connector, wherein:

[0010] The first body is connected at both ends and has a channel for the cryogenic propellant to flow therein. The first flange and the second flange are respectively arranged at both ends of the first body.

[0011] The first flange is provided with first positioning holes and a first fixing portion, the first positioning holes are evenly distributed along the circumferential surface of the first flange, and the first fixing portion is arranged on the outer surface of the first flange.

[0012] In one embodiment, one end of the first body close to the first flange is a cone structure, a small end of the cone structure is connected to the first body, a large end of the cone structure is connected to the second flange, and the cone structure and the first body are integrally formed.

[0013] In one embodiment, the first fixing portion and the first flange are integrally formed, and the first fixing portion includes first fixing blocks symmetrically arranged in pairs, one end of the first fixing block is connected to the first flange, and the other end extends away from the first flange.

[0014] In one embodiment, a locking member is further included, and a first fixing hole is provided on the first fixing block. The locking member fixes the first flange and the connector through the first fixing hole, and the opening axis direction of the first fixing hole is perpendicular to the axis of the first body.

[0015] In one embodiment, the locking member includes a rotating shaft with two ends respectively passing through the first fixing holes and an adjusting portion that rotates freely along the surface of the rotating shaft; the adjusting portion includes an adjusting rod and an adjusting nut, one end of the adjusting rod is sleeved on the rotating shaft, so that the adjusting rod is configured to be rotatable along the circumferential direction of the rotating shaft, and the adjusting nut is screwed on the adjusting rod, and the first flange is tightly connected to the connector by adjusting the position of the adjusting nut on the adjusting rod.

[0016] Another aspect of the present invention provides a connector, the connector is used to connect with a ground pipeline, one end of the connector is provided with a third flange, and the connector is used to connect with an arrow valve through the third flange;

[0017] The third flange is provided with a second positioning hole and a second fixing portion, the second positioning holes are evenly distributed along the circumferential surface of the third flange, the second fixing portion is arranged on the outer surface of the third flange, and the second positioning holes correspond one to one with the first positioning holes of the arrow-shaped valve;

[0018] The connector is used to match the outer shell of the valve on the arrow, and a recessed portion is provided on one side. The recessed portion corresponds to the second positioning hole, and the recessed portion is used to provide an installation space for the breaking bolt.

[0019] In one embodiment, the second fixing portion and the third flange are integrally formed, and the second fixing portion includes second fixing blocks symmetrically arranged in pairs, one end of the second fixing block is connected to the third flange, and the other end extends away from the third flange.

[0020] In one embodiment, a second fixing hole is provided on the second fixing block, and the second fixing hole is used to cooperate with a locking member to fix the second flange to the connector, and the opening axis direction of the second fixing hole is designed to be perpendicular to the axis of the connector.

[0021] Another aspect of the present invention provides a connector docking structure, comprising an arrow valve and a connector, wherein the arrow valve is connected to the connector via a break bolt, wherein:

[0022] The arrow valve comprises a first body, a first flange connected to the first body and a second flange, the first flange is connected to a connector, and the second flange is connected to an arrow pipeline;

[0023] The first body is connected at both ends and has a channel for the cryogenic propellant to flow therein, and the first flange and the second flange are respectively arranged at both ends of the first body;

[0024] The first flange is provided with a first positioning hole and a first fixing portion, the first positioning holes are evenly distributed along the circumferential surface of the first flange, and the first fixing portion is connected to the first flange along the outer surface of the first flange;

[0025] The connector is used to connect with the ground pipeline, and one end of the connector is provided with a third flange, and the connector is used to connect with the arrow valve through the third flange;

[0026] The third flange is provided with a second positioning hole and a second fixing portion, the second positioning holes are evenly distributed along the circumferential surface of the third flange, the second fixing portion is arranged on the outer surface of the third flange, and the second positioning holes correspond one to one with the first positioning holes of the arrow-shaped valve;

[0027] The connector is used to cooperate with the arrow valve on one side of the shell is provided with a recessed portion, the recessed portion corresponds to the second positioning hole, the recessed portion is used to provide an installation space for a breaking bolt, and the breaking bolt passes through the first positioning hole and the second positioning hole in sequence to realize the fixed connection between the arrow valve and the connector.

[0028] Another aspect of the present invention provides a connector docking process, the specific steps are as follows:

[0029] S1, respectively provide the arrow valve, elastic seal and connector,

[0030] The arrow valve comprises a first body, a first flange and a second flange respectively connected to the first body, the second flange is used to connect to the arrow pipeline, the first flange and the second flange are respectively arranged at two ends of the first body, the first flange is provided with a first positioning hole and a first fixing part, the first positioning holes are evenly distributed along the circumferential surface of the first flange, and the first fixing part is arranged on the outer surface of the first flange;

[0031] The connector is used to connect with the ground pipeline, one end of the connector is provided with a third flange, the third flange is provided with a second positioning hole and a second fixing portion, the second positioning holes are evenly distributed along the circumferential surface of the third flange, the second fixing portion is arranged on the outer surface of the third flange, and the second positioning holes correspond one to one with the first positioning holes of the arrow valve;

[0032] S2, bringing the arrow valve and the connector closer to each other along the axis direction of the first body, and disposing an elastic sealing member between the arrow valve and the connector to seal the contact portion between the arrow valve and the connector;

[0033] S3, adjusting the docking position of the arrow-upper valve and the connector along the circumferential direction of the arrow-upper valve, so that the axis of the first positioning hole on the first flange and the axis of the second positioning hole on the third flange are located on the same straight line;

[0034] S4, sequentially penetrate the first positioning hole and the second positioning hole through a positioning structure to limit the docking of the arrow valve and the connector in the circumferential direction;

[0035] S5, respectively cooperating the locking member with the first fixing portion and the second fixing portion, so that the locking member overcomes the elastic force of the elastic sealing member, thereby completing the docking of the arrow-up valve and the connector;

[0036] S6, removing the positioning structure, and applying a breaking bolt to penetrate the first positioning hole and the second positioning hole in sequence to achieve a fixed connection between the arrow-on valve and the connector;

[0037] S7, adjusting the locking member to unlock it, thereby completing the manual operation of connecting the arrow-up valve with the connector.

[0038] Compared with the prior art, the embodiments of the present invention have at least one of the following advantages:

[0039] First, by providing a first positioning hole on the first flange and a second positioning hole on the third flange, and the second positioning hole corresponds one-to-one with the first positioning hole of the arrow valve, the second positioning hole and the first positioning hole can be penetrated by a positioning structure (the second positioning hole and the first positioning hole are equivalent to guide holes, and the positioning structure acts as a guide column) to avoid circumferential movement of the first flange and the third flange after docking, thereby facilitating the connection between the arrow valve and the connector.

[0040] By providing a first fixing portion on the first flange and a second fixing portion on the third flange, the locking member connects the first flange to the connector through the first fixing hole, thereby ensuring that the upper valve and the connector are tightly connected and fixed more firmly. After the locking member locks the upper valve and the connector, the positioning structure is replaced with a breaking bolt, and then the locking member is manually removed to complete the connection between the upper valve and the connector. The entire process only needs to be completed manually, and the operation is simple, which improves work efficiency.

[0041] Second, by evenly distributing the first positioning holes along the circumferential surface of the first flange and the second positioning holes along the circumferential surface of the third flange, not only can the docking of the arrow interface and the connector be facilitated and the circumferential movement between them be reduced, but also the contact part between the arrow valve and the connector can be ensured to be evenly stressed (breaking bolts penetrate the first positioning holes and the second positioning holes to connect the first flange and the third flange), thereby avoiding the deflection of the docking surface and the damage of the sealing surface and the sealing component to the docking surface, thereby making the seal tight and reducing the leakage of cryogenic propellant.

[0042] Third, the locking member includes a rotating shaft with both ends respectively passing through the first fixing holes and an adjusting portion that rotates freely along the surface of the rotating shaft. The adjusting rod is configured to be rotatable along the circumferential direction of the rotating shaft (so that the adjusting rod is located in the space between the first fixing block and the second fixing block that are symmetrically arranged in pairs), and the first flange is tightly connected to the connector by adjusting the position of the adjusting nut on the adjusting rod.

[0043] The whole structure has the advantages of reasonable design, stable structure, convenient operation, and can effectively avoid leakage of cryogenic propellant.

[0044] It should be understood that the above general description and the following detailed description are merely exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Attached Figure 1 This is a simplified structural diagram of the arrow interface of the present invention being connected to the connector via a positioning structure;

[0046] Attached Figure 2 A simplified structural diagram of the arrow interface of the present invention being connected to the connector through a locking member;

[0047] Attached Figure 3 A structural diagram of the present invention for removing the positioning structure and installing the breaking bolts when the arrow interface is connected to the connector;

[0048] Attached Figure 4 A simplified structural diagram of the present invention in which the arrow interface is connected to the connector and the locking piece is removed;

[0049] Attached Figure 5 It is a front view of the arrow interface of the present invention;

[0050] Attached Figure 6 It is a top view of the third flange of the present invention.

[0051] Description of reference numerals:

[0052] 1First body 2First flange

[0053] 3 Second flange 4 First positioning hole

[0054] 5First fixing portion 6Locking member

[0055] 7 second positioning hole 8 second fixing portion

[0056] 9 Breaking bolt 10 Positioning structure

[0057] 11 third flange 12 connector DETAILED DESCRIPTION

[0058] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clearly understood, the spirit of the contents disclosed in the present invention will be clearly explained with the accompanying drawings and detailed descriptions below. After understanding the embodiments of the contents of the present invention, any technician in the relevant technical field can change and modify the techniques taught by the contents of the present invention without departing from the spirit and scope of the contents of the present invention.

[0059] The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. In addition, elements / components with the same or similar reference numerals used in the drawings and embodiments are used to represent the same or similar parts.

[0060] The terms “first”, “second”, etc. used in this document do not particularly refer to an order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described with the same technical terms.

[0061] The directional terms used in this document, such as up, down, left, right, front or back, etc., are only used to refer to the directions of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0062] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0063] As used herein, "and / or" includes any or all combinations of the items described.

[0064] The terms "substantially" and "approximately" used herein are used to modify any quantity or error that may vary slightly, but these slight changes or errors do not change their essence. Generally speaking, the range of slight changes or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. Those skilled in the art should understand that the aforementioned values ​​can be adjusted according to actual needs and are not limited thereto.

[0065] Certain terms used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of the present application.

[0066] See also Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, an embodiment of the present invention provides an arrow valve, comprising a first body 1, a first flange 2 and a second flange 3 respectively connected to the first body 1, the second flange 3 is used to connect to the arrow pipeline, and the first flange 2 is used to connect to the connector 12. The first body 1 is connected at both ends and has a channel for the cryogenic propellant to flow inside, and the first flange 2 and the second flange 3 are respectively arranged at both ends of the first body 1. The first flange 2 is provided with a first positioning hole 4 and a first fixing portion 5, the first positioning holes 4 are evenly distributed along the circumferential surface of the first flange 2, and the first fixing portion 5 is arranged on the outer surface of the first flange 2.

[0067] It should be noted that, in order to facilitate the connection between the first body 1 and the channel of the connector 12 (in some application scenarios, the channel diameter of the first body 1 is smaller than the channel diameter of the connector 12), for example, the end of the first body 1 close to the first flange 2 is a cone structure, the small end of the cone structure is connected to the first body 1, and the large end of the cone structure is connected to the second flange 3, and the inner diameter of the cone matches the inner diameter of the channel of the connector 12. In order to ensure that the cone structure is tightly connected to the first body 1 and fixed firmly, for example, the cone structure and the first body 1 can be connected by welding. In this embodiment, in order to make the cone structure and the first body 1 more tightly connected and more firmly fixed, for example, the two can adopt an integrated molding design, and the process is not explained here.

[0068] In addition, in order to facilitate the delivery of cryogenic propellants, for example, the first body 1 has a cylindrical shape. In order to prevent the first body 1 and the connector 12 from circumferentially rotating, for example, the number of the first positioning holes 4 is 2, 3 or 4. After a large number of test simulations, assuming that the number of the first positioning holes 4 is set to A, when A≥3 is satisfied, the circumferential rotation between the first body 1 and the connector 12 can be reduced, and the positioning of the positioning structure 10 (positioning pin) can be facilitated.

[0069] It is worth noting that in this embodiment, in order to make the first fixing portion 5 and the first flange 2 tightly connected and firmly fixed, for example, the first fixing portion 5 and the first flange 2 are designed to be integrally formed. In order to facilitate the fixing of the locking member 6 and prevent the locking member 6 from circumferential movement, for example, the first fixing portion 5 includes first fixing blocks symmetrically arranged in pairs (the space between the two first fixing blocks acts as a fixing groove, so that the adjustment rod of the locking member is located therein, which can prevent circumferential movement), one end of the first fixing block is connected to the first flange 2, and the other end extends to the side away from the first flange 2.

[0070] In order to ensure the structural stability of the first fixed block, for example, the shape of the first fixed block is a rectangular parallelepiped. In this embodiment, the shape of the first fixed block is described as a rectangular parallelepiped, and in actual application, the first fixed block can also be a cube or other structure protruding from the outer surface of the flange, which will not be illustrated one by one here. In order to facilitate the connection between the first fixed block and the first flange 2 so that the two are tightly connected, for example, the connection side of the first fixed block and the first flange 2 is provided with a curved surface that matches the first flange. In addition, in order to prevent the R&D personnel from being scratched by the first fixed block during the installation of the connector, for example, a circular arc chamfer can be set on the side of the first fixed block away from the first flange 2.

[0071] In addition, the arrow valve also includes a locking member 6, and two first fixing blocks arranged opposite to each other are respectively provided with first fixing holes, and the rod-shaped portion of the locking member is arranged to pass through the two first fixing holes, and the other portion is sleeved on the rod-shaped portion and can be rotatably arranged, and the first flange 2 and the connector 12 are fixedly connected and separated by the rotation of the other portion around the rod-shaped portion. In order to facilitate the adjustment of the locking member, for example, the opening axis direction of the first fixing hole is perpendicular to the axis of the first main body 1, so that the locking member can be rotated relative to the first main body 1 to adjust the connection tightness between the first flange 2 and the connector 12.

[0072] Specifically, when two fixing blocks are arranged opposite to each other on the outer surface of the first flange 2 (for example, two groups of fixing blocks are arranged on the outer surface, and each group of fixing blocks includes two fixing blocks arranged facing each other), the locking member 6 includes a rotating shaft with two first fixing holes respectively passing through the two ends, and an adjusting portion that rotates freely along the surface of the rotating shaft (in the circumferential direction of the rotating shaft). The adjusting portion includes an adjusting rod and an adjusting nut, one end of the adjusting rod is sleeved on the rotating shaft, so that the adjusting rod is configured to be rotatable along the circumferential direction of the rotating shaft, and the adjusting nut is screwed on the adjusting rod. By adjusting the position of the adjusting nut on the adjusting rod, the tightness of the connection between the first flange 2 and the connector 12 is adjusted (in this process, the adjusting nut can overcome the elastic force of the seal between the arrow interface and the connector, so that the arrow interface and the connector are close to each other and close to each other).

[0073] Another aspect of the present invention provides a connector, see Figure 1 , Figure 4 , Figure 5 and Figure 6 The connector 12 shown is used to connect with the ground pipeline. A third flange 11 is provided at one end of the connector 12, and the connector 12 is used to connect with the arrow valve through the third flange 11. The third flange 11 is provided with a second positioning hole 7 and a second fixing portion 8, the second positioning holes 7 are evenly distributed along the circumferential surface of the third flange 11, the second fixing portion 8 is arranged on the outer surface of the third flange 11, and the second positioning holes 7 correspond one to one with the first positioning holes 4 of the arrow valve. A recessed portion is provided on the outer shell of the connector 12 on one side for matching with the arrow valve, and the recessed portion corresponds to the second positioning hole 7, and the recessed portion is used to provide an installation space for the breaking bolt 9.

[0074] It is worth mentioning that in order to make the second fixing portion 8 and the third flange 11 more tightly connected and more firmly fixed, for example, the second fixing portion 8 and the third flange 11 are integrally formed. For example, along the outer periphery of the third flange 11, a fixing structure formed by two pairs of second fixing portions can be symmetrically arranged, and each pair of second fixing portions includes second fixing blocks arranged opposite to each other (the space between the two second fixing blocks acts as a fixing groove, so that the adjustment rod of the locking member 6 is located therein, and circumferential movement can be avoided), and one end of the second fixing block is connected to the third flange 11, and the other end extends to a side away from the third flange 11.

[0075] It is particularly important to point out that, in order to facilitate the installation of the locking member 6, for example, each of each pair of second fixing blocks is provided with a second fixing hole (when the first fixing hole is unstable, the rotating shaft of the locking member can also pass through the second fixing hole), and the second fixing hole is used to cooperate with the locking member 6 to fix the second flange 3 to the connector 12, and the opening axial direction of the second fixing hole is designed to be perpendicular to the axis of the connector 12.

[0076] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, another aspect of the present invention provides a connector docking structure, comprising an arrow valve and a connector, wherein the arrow valve and the connector are connected by a breaking bolt. The arrow valve comprises a first body, a first flange connected to the first body, and a second flange, wherein the first flange is connected to the connector, and the second flange is connected to the arrow pipeline.

[0077] The first body 1 is connected at both ends and has a channel for the cryogenic propellant to flow therein. The first flange 2 and the second flange 3 are respectively arranged at both ends of the first body 1 .

[0078] The first flange 2 is provided with first positioning holes 4 and first fixing portions 5 . The first positioning holes 4 are evenly distributed along the circumferential surface of the first flange 2 . The first fixing portions 5 are connected to the first flange 2 along the outer surface of the first flange 2 .

[0079] The connector 12 is used to be connected to a ground pipeline, and a third flange 11 is provided at one end of the connector 12 . The connector 12 is used to be connected to the arrow valve through the third flange 11 .

[0080] The third flange 11 is provided with second positioning holes 7 and a second fixing portion 8. The second positioning holes 7 are evenly distributed along the circumferential surface of the third flange 11. The second fixing portion 8 is arranged on the outer surface of the third flange 11. The second positioning holes 7 correspond one to one with the first positioning holes 4 of the arrow-shaped valve.

[0081] The connector is used to cooperate with the outer shell on one side of the arrow valve, and a recessed portion is provided. The recessed portion corresponds to the second positioning hole. The recessed portion is used to provide an installation space for the breaking bolt. The breaking bolt 9 passes through the first positioning hole 4 and the second positioning hole 7 in sequence to realize the fixed connection between the arrow valve and the connector.

[0082] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, another aspect of the present invention provides a connector docking process, and the specific steps are as follows:

[0083] Step 1: Provide the arrow valve, elastic seal and connector respectively.

[0084] The arrow-on valve includes a first main body 1, a first flange 2 and a second flange 3 respectively connected to the first main body 1, the second flange 3 is used to connect to the arrow-on pipeline, the first flange 2 and the second flange 3 are respectively arranged at both ends of the first main body 1, and the first flange 2 is provided with a first positioning hole 4 and a first fixing part 5. The first positioning holes 4 are evenly distributed along the circumferential surface of the first flange 2, and the first fixing part 5 is arranged on the outer surface of the first flange 2.

[0085] The connector 12 is used to connect to the ground pipeline. A third flange 11 is provided at one end of the connector 12. The third flange 11 is provided with a second positioning hole 7 and a second fixing portion 8. The second positioning holes 7 are evenly distributed along the circumferential surface of the third flange 11. The second fixing portion 8 is arranged on the outer surface of the third flange 11. The second positioning holes 7 correspond one-to-one to the first positioning holes 4 of the arrow valve.

[0086] Step 2: The arrow valve and the connector 12 are brought close to each other along the axial direction of the first body 1, and an elastic sealing member is disposed between the arrow valve and the connector 12 to seal the contact portion between the arrow valve and the connector.

[0087] Step 3: Adjust the docking position of the arrow-on valve and the connector along the circumferential direction of the arrow-on valve so that the axis of the first positioning hole 4 on the first flange and the axis of the second positioning hole 7 on the third flange 11 are located on the same straight line.

[0088] Step 4: The first positioning hole 4 and the second positioning hole 7 are sequentially penetrated through the positioning structure to limit the docking of the arrow valve and the connector in the circumferential direction. In order to prevent the positioning structure from rotating circumferentially, for example, the first positioning hole 4 and the second positioning hole 7 are designed as a long hole structure (in the long hole structure, at least one set of extended lines of mutually symmetrical edges are parallel to each other), and at the same time, the parts of the positioning structure close to the first positioning hole and the second positioning hole are designed to match the long hole structure, thereby preventing the positioning structure from rotating circumferentially and facilitating the limitation of the docking of the arrow valve and the connector. In addition, in order to prevent the positioning structure from detaching from the positioning hole, for example, a nut can be set at one end of the positioning structure, and the nut is used to lock one end of the positioning structure, so as to prevent the positioning structure from falling off due to axial movement along the first positioning hole.

[0089] Step 5: The locking member 6 cooperates with the first fixing portion 5 and the second fixing portion 8 respectively, so that the locking member 6 overcomes the elastic force of the elastic sealing member to complete the docking of the arrow-up valve and the connector.

[0090] The rod-shaped portion of the locking member 6 is arranged through two first fixing holes arranged mutually, and the other portion is sleeved on the rod-shaped portion and can be rotatably arranged, and the first flange 2 and the connector 12 are fixedly connected and separated by the rotation of the other portion around the rod-shaped portion. For example, in the case where two fixing blocks are arranged opposite to each other on the outer surface of the first flange 2 (for example, two groups of fixing blocks are arranged on the outer surface, and each group of fixing blocks includes two fixing blocks arranged facing each other), the locking member 6 includes a rotating shaft with two ends respectively passing through the two first fixing holes and an adjusting portion freely rotating along the surface of the rotating shaft (in the circumferential direction of the rotating shaft). The adjustment part includes an adjustment rod and an adjustment nut. One end of the adjustment rod (the other part) is sleeved on the rotating shaft (the rod-shaped part), so that the adjustment rod is configured to be rotatable along the circumferential direction of the rotating shaft (during installation, firstly, one end of the rotating shaft is passed through one of the first fixing holes and then through the adjustment rod, and then through the other first fixing hole, so that one end of the adjustment rod can rotate freely around the surface of the rotating shaft. In the process of locking the arrow valve and the connector with the locking piece 6, the other end of the adjustment rod approaches the center of the connector by rotation, and finally clings to the outer surface of the third flange (the adjustment rod is located in the space between two fixed blocks facing each other). Afterwards, the adjustment nut can be screwed onto the adjustment rod, and the adjustment nut can be adjusted in the adjustment direction. The position on the node rod adjusts the tightness of the connection between the first flange 2 and the connector 12 (in this process, the adjusting nut can overcome the elastic force of the elastic seal between the upper interface and the connector, so that the upper interface and the connector are close to each other and close to each other). In this process, the number of the first fixing part, the second fixing part 8 and the locking part 6 are all 3. When the first flange is connected to the third method, the position of the adjusting nut on the adjusting rod can be adjusted at the same time to make the first flange 2 and the connector 12 tightly connected, thereby ensuring that the elastic seal is more evenly stressed and avoiding the elastic seal from sliding (deviation to one side, the pressure between the first flange 2 and the connector 12 increases, causing damage to the elastic seal, thereby affecting the seal).

[0091] Step six, remove the positioning structure, apply the breaking bolt 9 (when pressure is applied in the axial direction, the structure breaks after reaching the pressure limit) to pass through the first positioning hole and the second positioning hole in sequence to achieve a fixed connection between the arrow valve and the connector (when the connector needs to be separated from the arrow interface, the breaking bolt is disconnected by pulling the connector, thereby completing the separation of the connector and the arrow interface).

[0092] Step 7. After installing the end bolt, adjust the locking piece 6 to unlock it (remove the entire locking piece, that is, twist the adjusting nut to disengage it from the adjusting rod, remove the rotating shaft from the first fixing hole, and the adjusting rod falls off), thereby completing the manual operation of connecting the arrow valve with the connector.

[0093] Compared with the prior art, the embodiments of the present invention have at least one of the following advantages:

[0094] First, by providing a first positioning hole 4 on the first flange 2 and a second positioning hole 7 on the third flange 11, and the second positioning hole 7 corresponds to the first positioning hole 4 of the arrow valve one by one, the second positioning hole 7 and the first positioning hole 4 can be penetrated by the positioning structure (the second positioning hole and the first positioning hole are equivalent to guide holes, so that the positioning structure penetrates), when the contact surfaces of the first flange 2 and the third flange 11 are in contact, the circumferential movement of the first flange 2 and the third flange 11 after docking can be avoided, the damage of the seal can be reduced, and the connection between the arrow valve and the connector 12 is facilitated, and the cryogenic propellant can be avoided from leaking from the gap between the two.

[0095] By providing the first fixing portion 5 on the first flange 2 and the second fixing portion 8 on the third flange 11, the locking member 6 connects the first flange to the connector 12 through the first fixing hole, thereby ensuring that the upper valve and the connector 12 are tightly connected and fixed more firmly. After the locking member 6 locks the upper valve and the connector, the positioning structure can be replaced with the breaking bolt 9, and then the locking member is removed, and then the upper valve and the connector 12 are connected manually. The whole process only needs to be completed manually, and the operation is simple, which improves work efficiency.

[0096] Secondly, by evenly distributing the first positioning holes 4 along the circumferential surface of the first flange 2 and the second positioning holes 7 along the circumferential surface of the third flange 111, not only can the docking of the arrow interface and the connector 12 be facilitated and the circumferential movement therebetween be reduced, but also the contact portion between the arrow valve and the connector 12 can be ensured to be evenly stressed (the breaking bolts 9 penetrate the first positioning holes 4 and the second positioning holes 7 to connect the first flange 2 and the third flange 11), thereby avoiding the deflection of the docking surface and the damage of the sealing surface and the sealing component to the docking surface, thereby making the seal rigorous and reducing the leakage of cryogenic propellant during the propellant filling process.

[0097] Third, the locking member 6 includes a rotating shaft with both ends respectively passing through the first fixing holes and an adjusting portion that rotates freely along the surface of the rotating shaft. The adjusting rod is configured to be rotatable along the circumferential direction of the rotating shaft (so that the adjusting rod is located in the space between each pair of first fixing blocks and second fixing blocks that are arranged facing each other), which can facilitate the locking operation of the connector and the arrow valve, and the tightness of the connection between the first flange and the connector can be changed by adjusting the position of the adjusting nut on the adjusting rod.

[0098] The whole structure has the advantages of reasonable design, stable structure, convenient operation, and can effectively avoid leakage of cryogenic propellant.

[0099] The above description is only an illustrative specific implementation manner of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. An arrow valve, characterized in that: It comprises a first body, a first flange and a second flange respectively connected to the first body, the second flange is used to connect to the pipeline on the arrow, and the first flange is used to connect to the third flange at one end of the connector, wherein: The first body is connected at both ends and has a channel for the cryogenic propellant to flow therein. The first flange and the second flange are respectively arranged at both ends of the first body. The first flange is provided with first positioning holes and first fixing parts, the first positioning holes are evenly distributed along the circumferential surface of the first flange, the first fixing part is arranged on the outer surface of the first flange, and the number of the first positioning holes is not less than 3. The third flange is provided with a second positioning hole and a second fixing portion, the second positioning holes are evenly distributed along the circumferential surface of the third flange, and the second fixing portion is arranged on the outer surface of the third flange. The first positioning holes correspond to the second positioning holes one by one, and the first fixing portions correspond to the second fixing portions one by one. The first fixing portion and the first flange are integrally formed, and the first fixing portion includes first fixing blocks symmetrically arranged in pairs, one end of the first fixing block is connected to the first flange, and the other end extends to a side away from the first flange. The first fixing block further comprises a locking member, wherein the first fixing block is provided with a first fixing hole, and the locking member fixes the first flange and the third flange through the first fixing hole, and the opening axis direction of the first fixing hole is perpendicular to the axis of the first body. The locking member includes a rotating shaft with two ends respectively passing through the first fixing holes and an adjusting portion that rotates freely along the surface of the rotating shaft; the adjusting portion includes an adjusting rod and an adjusting nut, one end of the adjusting rod is sleeved on the rotating shaft, so that the adjusting rod is configured to be rotatable along the circumferential direction of the rotating shaft, and the adjusting nut is screwed on the adjusting rod, and the first flange and the third flange are tightly connected by adjusting the position of the adjusting nut on the adjusting rod.

2. The arrow valve according to claim 1, characterized in that: One end of the first body close to the first flange is a cone structure, the small end of the cone structure is connected to the first body, the large end of the cone structure is connected to the second flange, and the cone structure and the first body are integrally formed.

3. A connector, used to connect to a ground pipeline, characterized in that: A third flange is provided at one end of the connector, and the connector is used to be connected to the arrow valve according to claim 1 or 2 through the third flange; The third flange is provided with a second positioning hole and a second fixing portion, the second positioning holes are evenly distributed along the circumferential surface of the third flange, the second fixing portion is arranged on the outer surface of the third flange, and the second positioning holes correspond one to one with the first positioning holes of the arrow-shaped valve; The connector is used to match the outer shell of the valve on the arrow, and a recessed portion is provided on one side. The recessed portion corresponds to the second positioning hole, and the recessed portion is used to provide an installation space for the breaking bolt.

4. The connector according to claim 3, characterized in that: The second fixing portion and the third flange are integrally formed, and the second fixing portion comprises second fixing blocks symmetrically arranged in pairs, one end of the second fixing block is connected to the third flange, and the other end extends to a side away from the third flange.

5. The connector according to claim 4, characterized in that: The second fixing block is provided with a second fixing hole, and the second fixing hole is used to cooperate with a locking member to fix the second flange to the connector, and the opening axis direction of the second fixing hole is designed to be perpendicular to the axis of the connector.

6. A connector docking structure, characterized in that: The invention comprises the arrow valve and the connector according to claim 1 or 2, wherein the arrow valve and the connector are connected by a breaking bolt, wherein: The arrow valve comprises a first body, a first flange and a second flange connected to the first body, the first flange is connected to a connector, and the second flange is connected to an arrow pipeline; The first body is connected at both ends and has a channel for the cryogenic propellant to flow therein, and the first flange and the second flange are respectively arranged at both ends of the first body; The first flange is provided with a first positioning hole and a first fixing portion, the first positioning holes are evenly distributed along the circumferential surface of the first flange, and the first fixing portion is connected to the first flange along the outer surface of the first flange; The connector is used to connect with the ground pipeline, and one end of the connector is provided with a third flange, and the connector is used to connect with the arrow valve through the third flange; The third flange is provided with a second positioning hole and a second fixing portion, the second positioning holes are evenly distributed along the circumferential surface of the third flange, the second fixing portion is arranged on the outer surface of the third flange, and the second positioning holes correspond one to one with the first positioning holes of the arrow-shaped valve; The connector is used to cooperate with the arrow valve on one side of the shell is provided with a recessed portion, the recessed portion corresponds to the second positioning hole, the recessed portion is used to provide an installation space for a breaking bolt, and the breaking bolt passes through the first positioning hole and the second positioning hole in sequence to achieve a fixed connection between the arrow valve and the connector.

7. A connector docking process, characterized in that: S1. Provide the arrow valve, elastic seal and connector according to claim 1 or 2, respectively. The arrow valve comprises a first body, a first flange and a second flange respectively connected to the first body, the second flange is used to connect to the arrow pipeline, the first flange and the second flange are respectively arranged at two ends of the first body, the first flange is provided with a first positioning hole and a first fixing part, the first positioning holes are evenly distributed along the circumferential surface of the first flange, and the first fixing part is arranged on the outer surface of the first flange; The connector is used to connect with the ground pipeline, one end of the connector is provided with a third flange, the third flange is provided with a second positioning hole and a second fixing portion, the second positioning holes are evenly distributed along the circumferential surface of the third flange, the second fixing portion is arranged on the outer surface of the third flange, and the second positioning holes correspond one to one with the first positioning holes of the arrow valve; S2, bringing the arrow valve and the connector closer to each other along the axis direction of the first body, and disposing an elastic sealing member between the arrow valve and the connector to seal the contact portion between the arrow valve and the connector; S3, adjusting the docking position of the arrow-upper valve and the connector along the circumferential direction of the arrow-upper valve, so that the axis of the first positioning hole on the first flange and the axis of the second positioning hole on the third flange are located on the same straight line; S4, sequentially penetrate the first positioning hole and the second positioning hole through a positioning structure to limit the docking of the arrow valve and the connector in the circumferential direction; S5, respectively cooperating the locking member with the first fixing portion and the second fixing portion, so that the locking member overcomes the elastic force of the elastic sealing member, thereby completing the docking of the arrow-up valve and the connector; S6, removing the positioning structure, and applying a breaking bolt to penetrate the first positioning hole and the second positioning hole in sequence to achieve a fixed connection between the arrow-on valve and the connector; S7, adjusting the locking member to unlock it, thereby completing the manual operation of connecting the arrow-up valve with the connector.

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