A filling and draining connector for liquid rockets

Abstract

The present invention discloses a filling and draining connector for a liquid rocket, belonging to the technical field of rockets. The filling and draining connector for the liquid rocket includes: a delivery pipe, a jacking ring, an end cover, a driving assembly and a locking assembly; the liquid injection port of the delivery pipe is communicated with the flange on the rocket; the delivery pipe is connected to the flange on the rocket through the locking assembly; the jacking ring is detachably arranged at the liquid injection port of the delivery pipe; a through hole is formed in the delivery pipe; the driving assembly and the end cover can be selectively arranged at the through hole; when the driving assembly is arranged at the through hole, the action end of the driving assembly penetrates through the through hole and is connected to the jacking ring. The filling and draining connector for the liquid rocket of the present invention combines the functions of an open connector and a closed connector, reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of rockets, and particularly to a filling and draining connector for liquid rockets. Background Art

[0002] The filling and draining connector connects the ground filling pipeline and the on-board filling and draining valve, and is used for filling the propellant in the rocket tank and emergency draining of the propellant. The connector has a complex structure, a high degree of functional integration, high sealing requirements, requires remote control to achieve automatic detachment, needs to adapt to low-temperature environments, and needs to have the function of re-docking after detachment.

[0003] However, in the prior art, the filling and draining connector only has the function of a single open connector or closed connector. In the face of different working conditions, it is necessary to replace the open connector or closed connector, which is complex in operation and high in cost. Summary of the Invention

[0004] The present invention provides a filling and draining connector for liquid rockets, which solves or partially solves the technical problem that the filling and draining connector in the prior art only has the function of an open connector or a closed connector.

[0005] To solve the above technical problem, the present invention provides a filling and draining connector for liquid rockets, which is connected to the on-board flange. The filling and draining connector for liquid rockets includes: a delivery pipe, a jacking ring, an end cover, a driving assembly, and a locking assembly; the infusion port of the delivery pipe is communicated with the on-board flange; the delivery pipe is connected to the on-board flange through the locking assembly; the jacking ring is detachably arranged at the infusion port of the delivery pipe; a through hole is formed in the delivery pipe; the driving assembly and the end cover can be selectively arranged at the through hole; when the driving assembly is arranged at the through hole, the action end of the driving assembly penetrates through the through hole and is connected to the jacking ring.

[0006] Further, a connection seat is arranged on the delivery pipe, and the through hole is formed in the connection seat; when the driving assembly is arranged at the through hole, the fixed end of the driving assembly is detachably connected to the connection seat; when the end cover is arranged at the through hole, the end cover is detachably connected to the connection seat.

[0007] Further, a first sealing ring is arranged in the connection seat.

[0008] Further, a purging pipe joint is arranged on the delivery pipe, and the purging pipe joint is communicated with a first purging pipe.

[0009] Further, a second sealing ring is arranged at the contact position between the delivery pipe and the on-board flange.

[0010] Further, a heat insulation member is sleeved on the outer wall of the delivery pipe.

[0011] Further, the driving assembly includes: an opening and closing cylinder block, an opening and closing valve stem, an opening and closing valve core, an opening and closing valve cover, an insulating cylinder block, a first insulating member, a steel ball, and an insulating valve core; the insulating cylinder block is detachably connected to the conveying pipe, and a second insulating member is provided between the insulating cylinder block and the conveying pipe; the first insulating member is slidably disposed within the insulating cylinder block; a first end of the insulating valve core passes through the through hole and is connected to the jacking ring, and a second end of the insulating valve core is disposed within the first insulating member; the opening and closing cylinder block is detachably connected to the insulating cylinder block, a first air inlet is formed at the top of the opening and closing cylinder block, and a second air inlet is formed at the bottom of the opening and closing cylinder block; the opening and closing valve core is slidably disposed within the opening and closing cylinder block; a first end of the opening and closing valve stem passes through the insulating cylinder block and is disposed within the first insulating member, and a second end of the opening and closing valve stem is connected to the opening and closing valve core; the steel ball is disposed between the opening and closing valve stem and the insulating valve core; the opening and closing valve cover is disposed at the bottom of the opening and closing cylinder block.

[0012] Further, the driving assembly further includes: a limiting sleeve; the limiting sleeve is disposed between the conveying pipe and the first insulating member, and a first end of the insulating valve core sequentially passes through the limiting sleeve and the through hole and is connected to the jacking ring.

[0013] Further, the locking assembly includes: a bracket, a locking cylinder, a push rod, a hook seat, and a hook; the bracket is sleeved on the conveying pipe, and a third insulating member, a fourth insulating member, a fifth insulating member, and a sixth insulating member are provided between the bracket and the conveying pipe; a fixed end of the locking cylinder is fixedly arranged on the bracket, a moving end of the locking cylinder is connected to a first end of the push rod, a third air inlet is formed at the top of the locking cylinder, and a fourth air inlet is formed at the bottom of the locking cylinder; a plurality of stud nails are provided at a second end of the push rod; the hook seat is sleeved on the conveying pipe, and a seventh insulating member is provided between the hook seat and the conveying pipe; the hook includes: a hooking portion, a connecting portion, and a rotating portion; two ends of the connecting portion are respectively connected to the hooking portion and the rotating portion; the hooking portion can be hooked on the upper flange of the arrow; a first end of the rotating portion is rotatably disposed on the hook seat, and a second end of the rotating portion is hinged to the second end of the push rod.

[0014] Further, the liquid rocket filling and draining connector further includes: a waterproof vapor assembly; the waterproof vapor assembly includes: a protection box and a second purging pipe; the protection box is sleeved on the upper flange of the arrow and the conveying pipe; the second purging pipe is communicated with the protection box.

[0015] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0016] The infusion port of the delivery pipe is communicated with the flange on the arrow, the delivery pipe is connected to the flange on the arrow through a locking assembly, the jacking ring is detachably arranged at the infusion port of the delivery pipe, a through hole is opened on the delivery pipe, the driving assembly and the end cover can be selectively arranged at the through hole, when the driving assembly is arranged at the through hole, the action end of the driving assembly passes through the through hole and is connected to the jacking ring. Therefore, the delivery pipe is connected to the flange on the arrow through the locking assembly. When used as a closed connector, the jacking ring is installed at the infusion port of the delivery pipe, the driving assembly is installed at the through hole, and the action end of the driving assembly passes through the through hole and is connected to the jacking ring. When the propellant needs to be delivered, the driving assembly is started, and the action end of the driving assembly drives the jacking ring to move towards the flange on the arrow, so that the infusion port of the delivery pipe is opened, and the propellant is delivered through the delivery pipe. When the propellant does not need to be delivered, the driving assembly is started, and the action end of the driving assembly drives the jacking ring to move towards the infusion port of the delivery pipe, the jacking ring abuts against the infusion port of the delivery pipe, the infusion port of the delivery pipe is closed, and the delivery of the propellant is stopped. When used as an open connector, the jacking ring is separated from the infusion port of the delivery pipe, the driving assembly is removed from the through hole, and then the end cover is installed at the through hole to block the through hole, which has the functions of both an open connector and a closed connector and reduces costs. Brief Description of the Drawings

[0017] Figure 1 The front view of the filling and draining connector for liquid rocket provided by the embodiment of the present invention as a closed connector;

[0018] Figure 2 is Figure 1 the side view of;

[0019] Figure 3 is Figure 1 the sectional view taken along the line A-A of;

[0020] Figure 4 The front view of the filling and draining connector for liquid rocket provided by the embodiment of the present invention as an open connector;

[0021] Figure 5 is Figure 4 the side view of;

[0022] Figure 6 is Figure 4 the sectional view taken along the line B-B

[0023] Figure 7 is Figure 1 the structural schematic diagram of the locking assembly of the filling and draining connector for liquid rocket in. Detailed Embodiment

[0024] See Figure 1, a filling and draining connector for a liquid rocket provided by an embodiment of the present invention is connected to the upper flange 1 of the rocket. The filling and draining connector for the liquid rocket includes: a delivery pipe 2, a jacking ring 3, an end cover 4, a driving assembly 5, and a locking assembly 6.

[0025] The liquid inlet of the delivery pipe 2 is communicated with the upper flange 1 of the rocket.

[0026] The delivery pipe 2 is connected to the upper flange 1 of the rocket through the locking assembly 6.

[0027] The jacking ring 3 is detachably arranged at the liquid inlet of the delivery pipe 2.

[0028] A through hole is provided on the delivery pipe 2.

[0029] The driving assembly 5 and the end cover 4 can be selectively arranged at the through hole.

[0030] When the driving assembly 5 is arranged at the through hole, the action end of the driving assembly 5 passes through the through hole and is connected to the jacking ring 3.

[0031] In the specific embodiment of the present application, the liquid inlet of the delivery pipe 2 is communicated with the upper flange 1 of the rocket. The delivery pipe 2 is connected to the upper flange 1 of the rocket through the locking assembly 6. The jacking ring 3 is detachably arranged at the liquid inlet of the delivery pipe 2. A through hole is provided on the delivery pipe 2. The driving assembly 5 and the end cover 4 can be selectively arranged at the through hole. When the driving assembly 5 is arranged at the through hole, the action end of the driving assembly 5 passes through the through hole and is connected to the jacking ring 3. Therefore, the delivery pipe 2 is connected to the upper flange 1 of the rocket through the locking assembly 6. See Figures 1 - 3 , when used as a closed connector, the jacking ring 3 is installed at the liquid inlet of the delivery pipe 2, the driving assembly 5 is installed at the through hole, the action end of the driving assembly 5 passes through the through hole and is connected to the jacking ring 3. When it is necessary to transport the propellant, the driving assembly 5 is started. The action end of the driving assembly 5 drives the jacking ring 3 to move towards the upper flange 1 of the rocket, so that the liquid inlet of the delivery pipe 2 is opened, and the propellant is transported through the delivery pipe 2. When it is not necessary to transport the propellant, the driving assembly 5 is started. The action end of the driving assembly 5 drives the jacking ring 3 to move towards the liquid inlet of the delivery pipe 2. The jacking ring 3 abuts against the liquid inlet of the delivery pipe 2, closing the liquid inlet of the delivery pipe 2 and stopping the transport of the propellant. See Figures 4 - 6 , when used as an open connector, the jacking ring 3 is separated from the liquid inlet of the delivery pipe 2, the driving assembly 5 is removed from the through hole, and then the end cover 4 is installed at the through hole to block the through hole, which has the functions of both an open connector and a closed connector and reduces the cost.

[0032] In this embodiment, an embedding groove is provided on the end face of the jacking ring 3 facing away from the upper flange 1 of the rocket. The axial cross-sectional shape of the embedding groove is L-shaped, and the periphery of the liquid inlet of the delivery pipe 2 can be embedded in the embedding groove to ensure tight closing.

[0033] Specifically, a connecting seat 7 is provided on the delivery pipe 2, and a through hole is opened on the connecting seat 7.

[0034] When the driving assembly 5 is arranged at the through hole, the fixed end of the driving assembly 5 is detachably connected to the connecting seat 7. In this embodiment, the fixed end of the driving assembly 5 can be connected to the connecting seat 7 by bolts, which is convenient for disassembly and assembly.

[0035] When the end cover 4 is arranged at the through hole, the end cover 4 is detachably connected to the connecting seat 7. In this embodiment, the end cover 4 can be connected to the connecting seat 7 by bolts, which is convenient for disassembly and assembly.

[0036] Specifically, a first sealing ring 8 is provided inside the connecting seat 7. In this embodiment, the first sealing ring 8 is an elastic energy storage sealing ring, and the number of elastic energy storage sealing rings is two, realizing radial sealing and axial sealing between the fixed end of the driving assembly 5 or the end cover 4 and the connecting seat 7, simplifying the dimensions between the fixed end of the driving assembly 5 or the end cover 4 and the connecting seat 7, and also ensuring the reliability of the sealing.

[0037] Specifically, a purge pipe joint 10 is provided on the delivery pipe 2, and the purge pipe joint 10 is communicated with the first purge pipe. When the jacking ring 3 abuts against the infusion port of the delivery pipe 2 and closes the infusion port of the delivery pipe 2, low-pressure nitrogen is introduced into the purge pipe joint 10 through the first purge pipe, and the low-pressure nitrogen enters the delivery pipe 2 to purge the remaining propellant in the delivery pipe 2.

[0038] Specifically, a second sealing ring 9 is provided at the contact position between the delivery pipe 2 and the flange on the rocket 1. In this embodiment, the second sealing ring 9 is an elastic energy storage sealing ring, and the number of elastic energy storage sealing rings is two, realizing radial sealing and axial sealing between the flange on the rocket 1 and the delivery pipe 2, and ensuring the reliability of the sealing.

[0039] Specifically, a heat insulation member 11 is sleeved on the outer wall of the delivery pipe 2. In this embodiment, the heat insulation member 11 is made of foamed rigid polyurethane foam with a thickness of 11 mm, which can reduce the damage of external heat to the propellant quality, and at the same time reduce the influence of the internal low-temperature environment on the external actuators. By adopting the heat insulation method of the heat insulation member 11, the delivery pipe 2 can work within a relatively wide temperature range. The delivery pipe 2 can transport cryogenic propellants and can also transport normal-temperature propellants, and has the functions of being used for normal-temperature rockets and cryogenic rockets at the same time.

[0040] Specifically, the driving assembly 5 includes: an opening and closing cylinder body 5-1, an opening and closing valve rod 5-2, an opening and closing valve core 5-3, an opening and closing valve cover 5-4, an insulating cylinder body 5-5, a first insulating member 5-6, a steel ball 5-7 and an insulating valve core 5-8.

[0041] The cold-insulating cylinder body 5-5 is detachably connected to the conveying pipe 2, and a second cold-insulating member 5-9 is provided between the cold-insulating cylinder body 5-5 and the conveying pipe 2. In this embodiment, the fins of the second cold-insulating member 5-9 increase the convective heat transfer coefficient, ensuring that the working environment temperature of the opening and closing cylinder body 5-1 is higher than -30°C. Further, the conveying pipe 2 can operate within a relatively wide temperature range, enabling the conveying pipe 2 to convey cryogenic propellants and also normal-temperature propellants, and simultaneously having the functions of being used for normal-temperature rockets and cryogenic rockets.

[0042] The first cold-insulating member 5-6 is slidably arranged inside the cold-insulating cylinder body 5-5. In this embodiment, the material of the first cold-insulating member 5-6 can be polyimide, with a thickness of not less than 10 mm. Its function is to increase the thermal resistance and reduce the low-temperature heat leakage inside the conveying pipe 2, which may affect the operation of the opening and closing valve core 5-3. Further, the conveying pipe 2 can operate within a relatively wide temperature range, enabling the conveying pipe 2 to convey cryogenic propellants and also normal-temperature propellants, and simultaneously having the functions of being used for normal-temperature rockets and cryogenic rockets.

[0043] The first end of the cold-insulating valve core 5-8 passes through the through-hole and is connected to the jacking ring 3, and the second end of the cold-insulating valve core 5-8 is arranged inside the first cold-insulating member 5-6.

[0044] The opening and closing cylinder body 5-1 is detachably connected to the cold-insulating cylinder body 5-5. In this embodiment, the opening and closing cylinder body 5-1 can be connected to the cold-insulating cylinder body 5-5 by bolts, facilitating disassembly and assembly. The top of the opening and closing cylinder body 5-1 is provided with a first air inlet, and the bottom of the opening and closing cylinder body 5-1 is provided with a second air inlet. In this embodiment, the cylinder diameter of the opening and closing cylinder body 5-1 is 24 mm, and the working gas pressure is 5 MPa.

[0045] The opening and closing valve core 5-3 is slidably arranged inside the opening and closing cylinder body 5-1. That is, the opening and closing valve core 5-3 is arranged between the first air inlet 5-31 and the second air inlet 5-32.

[0046] The first end of the opening and closing valve rod 5-2 passes through the cold-insulating cylinder body 5-5 and is arranged inside the first cold-insulating member 5-6, and the second end of the opening and closing valve rod 5-2 is connected to the opening and closing valve core 5-3.

[0047] The steel ball 5-7 is arranged between the opening and closing valve rod 5-2 and the cold-insulating valve core 5-8, and point contact is achieved through the steel ball 5-7 to increase the thermal resistance and reduce the transfer of low temperature inside the conveying pipe 2 by the cold-insulating valve core 5-8 to the opening and closing valve rod 5-2, ensuring the normal operation of the opening and closing valve core 5-3. Further, the conveying pipe 2 can operate within a relatively wide temperature range, enabling the conveying pipe 2 to convey cryogenic propellants and also normal-temperature propellants, and simultaneously having the functions of being used for normal-temperature rockets and cryogenic rockets. At the same time, the steel ball 5-7 simulates a ball hinge to enhance the flexibility of transmission and prevent the opening and closing valve rod 5-2 from being stuck with the cold-insulating valve core 5-8.

[0048] The opening and closing valve cover 5-4 is provided at the bottom of the opening and closing cylinder block 5-1 for closing the opening and closing cylinder block 5-1.

[0049] Among them, when the propellant needs to be transported, the second inflation port 5-32 is inflated. The gas pushes the opening and closing valve core 5-3 to act inside the opening and closing cylinder block 5-1. The opening and closing valve core 5-3 drives the opening and closing valve rod 5-2 to act in the direction away from the opening and closing valve cover 5-4. The opening and closing valve rod 5-2 drives the first heat insulation member 5-6 to act inside the heat insulation cylinder block 5-5. The first heat insulation member 5-6 drives the heat insulation valve core 5-8 to act. The heat insulation valve core 5-8 drives the top-opening ring 3 to act in the direction of the arrow upper flange 1, so that the infusion port of the delivery pipe 2 is opened, and the propellant is transported through the delivery pipe 2. When the propellant does not need to be transported, the inflation of the second inflation port 5-32 is stopped, and the first inflation port 5-31 is inflated. The gas pushes the opening and closing valve core 5-3 to act inside the opening and closing cylinder block 5-1. The opening and closing valve core 5-3 drives the opening and closing valve rod 5-2 to act in the direction of the opening and closing valve cover 5-4. The opening and closing valve rod 5-2 drives the first heat insulation member 5-6 to act inside the heat insulation cylinder block 5-5. The first heat insulation member 5-6 drives the heat insulation valve core 5-8 to act. The heat insulation valve core 5-8 drives the top-opening ring 3 to act in the direction of the infusion port of the delivery pipe 2. The top-opening ring 3 abuts against the infusion port of the delivery pipe 2, closes the infusion port of the delivery pipe 2, and stops transporting the propellant.

[0050] Specifically, the driving assembly 5 further includes: a limit sleeve 5-10.

[0051] The limit sleeve 5-10 is arranged between the delivery pipe 2 and the first heat insulation member 5-6. The first end of the heat insulation valve core 5-8 passes through the limit sleeve 5-10 and the through hole in sequence and is connected to the top-opening ring 3. The limit sleeve 5-10 limits and guides the action of the heat insulation valve core 5-8 to ensure that the heat insulation valve core 5-8 can drive the top-opening ring 3 to act.

[0052] See Figure 7 Specifically, the locking assembly 6 includes: a bracket 6-1, a locking cylinder 6-2, a push rod 6-3, a hook seat 6-4 and a hook 6-5.

[0053] The bracket 6-1 is sleeved on the delivery pipe 2. In this embodiment, the shape of the bracket 6-1 is annular, with a radius of 115 mm and a thickness of 12 mm, which provides an installation space for the locking cylinder 6-2, increases the heat dissipation area, enhances the convective heat transfer effect, ensures that the working environment temperature of the locking cylinder 6-2 is higher than -30 °C, further enables the delivery pipe 2 to work within a relatively wide temperature range, enables the delivery pipe 2 to transport cryogenic propellants and can also transport normal temperature propellants, and simultaneously has the functions of being used for normal temperature rockets and cryogenic rockets.

[0054] A third heat insulation member 6-6, a fourth heat insulation member 6-7, a fifth heat insulation member 6-8 and a sixth heat insulation member 6-9 are provided between the bracket 6-1 and the delivery pipe 2. The third heat insulation member 6-6, the fourth heat insulation member 6-7, the fifth heat insulation member 6-8 and the sixth heat insulation member 6-9 form a heat insulation sleeve. The material of the heat insulation sleeve can be polyimide, and the thickness is 10 mm, so as to increase the thermal resistance. Further, the delivery pipe 2 can work within a wider temperature range, enabling the delivery pipe 2 to convey cryogenic propellants or normal-temperature propellants, and simultaneously having the functions of being used for normal-temperature rockets and cryogenic rockets.

[0055] The fixed end of the locking cylinder 6-2 is fixedly arranged on the bracket 6-1. The actuating end of the locking cylinder 6-2 is connected to the first end of the push rod 6-3. A third inflation port 6-21 is provided at the top of the locking cylinder 6-2, and a fourth inflation port 6-22 is provided at the bottom of the locking cylinder 6-2. The inner diameter of the cylinder body of the locking cylinder 6-2 is 12.5 mm, and the acting gas pressure is 4 - 5 MPa.

[0056] A plurality of stud nails 6-10 are provided at the second end of the push rod 6-3 to enhance the low-temperature ice-breaking ability and ensure the smooth separation of the delivery pipe 2 and the upper flange 1 of the rocket.

[0057] The hook seat 6-4 is sleeved on the delivery pipe 2. A seventh heat insulation member 6-11 is provided between the hook seat 6-4 and the delivery pipe 2. The material of the seventh heat insulation member 6-11 can be polyimide to increase the thermal resistance. Further, the delivery pipe 2 can work within a wider temperature range, enabling the delivery pipe 2 to convey cryogenic propellants or normal-temperature propellants, and simultaneously having the functions of being used for normal-temperature rockets and cryogenic rockets.

[0058] The hook 6-5 includes a hooking portion 6-51, a connecting portion 6-52 and a rotating portion 6-53.

[0059] Both ends of the connecting portion 6-52 are respectively connected to the hooking portion 6-51 and the rotating portion 6-53. In this embodiment, the connecting portion 6-52 is perpendicular to the hooking portion 6-51 and the rotating portion 6-53 respectively.

[0060] The hooking portion 6-51 can be hooked on the upper flange 1 of the rocket.

[0061] The first end of the rotating portion 6-53 is rotatably arranged on the hook seat 6-4, and the second end of the rotating portion 6-53 is hinged to the second end of the push rod 6-3.

[0062] Among them, when connecting the delivery pipe 2 to the flange on the arrow 1, inflate the third inflation port 6-21. The gas drives the moving end of the locking cylinder 6-2 to move away from the hook seat 6-4. The moving end of the locking cylinder 6-2 drives the push rod 6-3 to move. The push rod 6-3 pulls the second end of the rotating part 6-53. The first end of the rotating part 6-53 rotates on the hook seat 6-4. The rotating part 6-53 drives the hooking part 6-51 to hook on the flange on the arrow 1, so as to connect the delivery pipe 2 to the flange on the arrow 1. When disassembling the delivery pipe 2 from the flange on the arrow 1, stop inflating the third inflation port 6-21 and inflate the fourth inflation port 6-22. The gas drives the moving end of the locking cylinder 6-2 to move towards the hook seat 6-4. The moving end of the locking cylinder 6-2 drives the push rod 6-3 to move. The push rod 6-3 pulls the second end of the rotating part 6-53. The first end of the rotating part 6-53 rotates on the hook seat 6-4. The rotating part 6-53 drives the hooking part 6-51 to disengage from the flange on the arrow 1, so as to separate the delivery pipe 2 from the flange on the arrow 1.

[0063] Specifically, the filling and draining connector for liquid rockets further includes: a waterproof and moisture-proof component 12.

[0064] The waterproof and moisture-proof component 12 includes: a protection box 12-1 and a second purging pipe 12-2.

[0065] The protection box 12-1 is sleeved on the flange on the arrow 1 and the delivery pipe 2 to prevent external air flow from entering the connection between the flange on the arrow 1 and the delivery pipe 2 and avoid water vapor condensation.

[0066] The second purging pipe 12-2 is communicated with the protection box 12-1.

[0067] Among them, when the delivery pipe 2 is delivering propellant, the second purging pipe 12-2 intermittently blows high-temperature and low-pressure nitrogen into the protection box 12-1 to ensure that the ambient temperature is higher than 0°C, so that there is no water vapor in the protection box 12-1, avoiding condensation of the flange on the arrow 1 and the delivery pipe 2 and facilitating disassembly and assembly.

[0068] Finally, it should be noted that the above specific implementation manners are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A filling and draining connector for liquid rockets, which is connected to the flange on the rocket, and is characterized in that, The filling and draining connector for liquid rocket includes: a delivery pipe, a jacking ring, an end cover, a driving assembly and a locking assembly; The liquid inlet of the delivery pipe is communicated with the flange on the rocket; The delivery pipe is connected to the flange on the rocket through the locking assembly; The jacking ring is detachably arranged at the liquid inlet of the delivery pipe; A through hole is formed in the delivery pipe; The driving assembly and the end cover can be selectively arranged at the through hole; When the driving assembly is arranged at the through hole, the action end of the driving assembly passes through the through hole and is connected to the jacking ring; The driving assembly includes: an opening and closing cylinder body, an opening and closing valve rod, an opening and closing valve core, an opening and closing valve cover, an insulating cylinder body, a first insulating part, a steel ball and an insulating valve core; The insulating cylinder body is detachably connected to the delivery pipe, and a second insulating part is arranged between the insulating cylinder body and the delivery pipe; The first insulating part is slidably arranged in the insulating cylinder body; The first end of the insulating valve core passes through the through hole and is connected to the jacking ring, and the second end of the insulating valve core is arranged in the first insulating part; The opening and closing cylinder body is detachably connected to the insulating cylinder body. A first inflation port is formed at the top of the opening and closing cylinder body, and a second inflation port is formed at the bottom of the opening and closing cylinder body; The opening and closing valve core is slidably arranged in the opening and closing cylinder body; The first end of the opening and closing valve rod passes through the insulating cylinder body and is arranged in the first insulating part, and the second end of the opening and closing valve rod is connected to the opening and closing valve core; The steel ball is arranged between the opening and closing valve rod and the insulating valve core; The opening and closing valve cover is arranged at the bottom of the opening and closing cylinder body; 2. The filling and draining connector for liquid rockets according to claim 1, characterized in that: A connecting seat is arranged on the delivery pipe, and the through hole is formed in the connecting seat; When the driving assembly is arranged at the through hole, the fixed end of the driving assembly is detachably connected to the connecting seat; When the end cover is arranged at the through hole, the end cover is detachably connected to the connecting seat; 3. The filling and draining connector for liquid rockets according to claim 2, characterized in that: A first sealing ring is arranged in the connecting seat; 4. The filling and draining connector for liquid rockets according to claim 2, characterized in that: A purging pipe joint is arranged on the delivery pipe, and the purging pipe joint is communicated with a first purging pipe; 5. The filling and draining connector for liquid rockets according to claim 1, characterized in that: A second sealing ring is arranged at the contact position between the delivery pipe and the flange on the rocket; 6. The filling and draining connector for liquid rockets according to claim 1, characterized in that: A heat insulating part is sleeved on the outer wall of the delivery pipe; 7. The filling and draining connector for liquid rockets according to claim 1, characterized in that, The driving assembly further includes: a limit sleeve; The limit sleeve is arranged between the delivery pipe and the first insulating part, and the first end of the insulating valve core passes through the limit sleeve and the through hole in sequence and is connected to the jacking ring; 8. The filling and draining connector for liquid rockets according to claim 1, characterized in that, The locking assembly includes: a bracket, a locking cylinder, a push rod, a hook seat and a hook; The bracket is sleeved on the delivery pipe, and a third insulating part, a fourth insulating part, a fifth insulating part and a sixth insulating part are arranged between the bracket and the delivery pipe; The fixed end of the locking cylinder is fixedly arranged on the bracket, the action end of the locking cylinder is connected to the first end of the push rod, a third inflation port is formed at the top of the locking cylinder, and a fourth inflation port is formed at the bottom of the locking cylinder; Multiple stud nails are arranged at the second end of the push rod; The hook seat is sleeved on the delivery pipe, and a seventh insulating part is arranged between the hook seat and the delivery pipe; The hook includes: a hooking part, a connecting part and a rotating part; Both ends of the connecting part are respectively connected to the hooking part and the rotating part; The hooking part can be hooked on the upper flange of the arrow; The first end of the rotating part is rotatably arranged on the hook seat, and the second end of the rotating part is hinged to the second end of the push rod.

9. The filling and draining connector for liquid rockets according to claim 1, wherein, The filling and draining connector for liquid rocket further includes: a waterproof vapor component; The waterproof vapor component includes: a protection box and a second purging pipe; The protection box is sleeved on the upper flange of the arrow and the conveying pipe; The second purging pipe is communicated with the protection box.

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