Rocket tank bursting test control system

Abstract

The utility model provides a control system for a blasting test of a rocket tank. The control system comprises a water injection and supplement control device, an oxygen tank pressurization control device and a combustion tank pressurization control device, the rocket stainless steel storage tank is of a common-bottom structure, and an oxygen tank on the upper portion of the storage tank is used for being filled with liquid oxygen propellants. The combustion box at the lower part of the storage box is used for filling a liquid methane propellant; the oxygen box and the combustion box are both connected with the water supply storage box; the water supply storage tank is used for providing a water source for liquid pressurization for the oxygen tank and the combustion tank; the water injection and supplement control device is used for controlling water injection cans of the water supply storage tank, the oxygen tank and the combustion tank; the oxygen tank pressurization control device is used for controlling the water supply storage tank to perform water injection step-by-step pressurization on the oxygen tank; the combustion box pressurization control device is used for controlling the water supply storage box to conduct water injection step-by-step pressurization on the combustion box. Therefore, the pressurized internal pressure bursting test of the stainless steel storage tank of the rocket is completed. According to the utility model, on-line automatic control can be carried out on the pressurized internal pressure bursting test of the stainless steel storage tank of the rocket, and the test working efficiency and the test control accuracy can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of aerospace, and particularly relates to a control system for the bursting test of a rocket storage tank. Background Technique

[0002] In the current aerospace field, most rocket storage tanks are made of traditional aluminum alloy materials. Such materials and their processing costs are relatively high, resulting in an increase in the overall manufacturing cost of rocket storage tanks. To solve this problem, a feasible solution is to replace the storage tank material of the liquid oxygen-methane rocket with stainless steel, which can greatly reduce the manufacturing cost of the rocket storage tank.

[0003] When the rocket storage tank is made of stainless steel, its design, material selection, and manufacturing process are essentially different from those of traditional aluminum alloy storage tanks. To ensure that the modified stainless steel storage tank can withstand the expected internal pressure load, especially to verify the stability of its welded structure and the overall strength, it is necessary to conduct an internal pressure test on the rocket storage tank. The internal pressure test for the rocket storage tank aims to evaluate the structural strength of the stainless steel storage tank under normal temperature and full pressure conditions, and determine the maximum safe pressure-bearing limit of the oxygen tank in the stainless steel storage tank under the same conditions. Summary of the Invention

[0004] To overcome at least to some extent the problems existing in the related art, the utility model provides a control system for the bursting test of a rocket storage tank.

[0005] According to an embodiment of the utility model, a control system for the bursting test of a rocket storage tank is provided, which is used for online control of the pressurized internal pressure bursting test of a rocket stainless steel storage tank. It includes a water injection and replenishment control device, an oxygen tank pressurization control device, and a fuel tank pressurization control device;

[0006] The rocket stainless steel storage tank adopts a common-bottom structure storage tank. The upper part of the storage tank is an oxygen tank, which is used to fill liquid oxygen propellant; the lower part of the storage tank is a fuel tank, which is used to fill liquid methane propellant; both the oxygen tank and the fuel tank are connected to a water supply storage tank; the water supply storage tank is used to provide a water source for liquid pressurization for the oxygen tank and the fuel tank;

[0007] The water injection and replenishment control device is used to control the water injection and filling of the water supply storage tank, the oxygen tank, and the fuel tank; the oxygen tank pressurization control device is used to control the water supply storage tank to gradually pressurize the oxygen tank by water injection; the fuel tank pressurization control device is used to control the water supply storage tank to gradually pressurize the fuel tank by water injection; so as to complete the pressurized internal pressure bursting test of the rocket stainless steel storage tank.

[0008] According to the rocket tank bursting test control system provided by the present utility model, the water supply tank is connected to a fire protection pipeline through a water supply pipeline, and the fire protection pipeline is used to connect to a water source; the oxygen tank is connected to the fire protection pipeline through an oxygen tank water injection pipeline, and the fuel tank is connected to the fire protection pipeline through a fuel tank water injection pipeline.

[0009] Further, a water supply centrifugal pump and a water supply centrifugal pump inlet valve are provided on the fire protection pipeline, and the water supply centrifugal pump inlet valve is used to switch on and off the fire protection pipeline; a water supply tank make-up valve is provided on the water supply pipeline, and the water supply tank make-up valve is used to switch on and off the water supply pipeline;

[0010] An oxygen tank water injection valve is provided on the oxygen tank water injection pipeline, and the oxygen tank water injection valve is used to switch on and off the oxygen tank water injection pipeline; a fuel tank water injection valve is provided on the fuel tank water injection pipeline, and the fuel tank water injection valve is used to switch on and off the fuel tank water injection pipeline;

[0011] The water supply centrifugal pump, the water supply centrifugal pump inlet valve, the water supply tank make-up valve, the oxygen tank water injection valve, and the fuel tank water injection valve are all connected to the water injection and make-up control device.

[0012] Further, the water supply tank is connected to the oxygen tank through an oxygen tank pressurizing constant pressure pump inlet pipeline, an oxygen tank pressurizing constant pressure pump, and an oxygen tank pressurizing constant pressure pump outlet pipeline in sequence; the water supply tank is connected to the fuel tank through a fuel tank pressurizing constant pressure pump inlet pipeline, a fuel tank pressurizing constant pressure pump, and a fuel tank pressurizing constant pressure pump outlet pipeline in sequence;

[0013] The oxygen tank pressurizing constant pressure pump is connected to an oxygen tank pressurizing control device, and the fuel tank pressurizing constant pressure pump is connected to a fuel tank pressurizing control device.

[0014] Furthermore, a water supply oxygen tank liquid supply valve is provided on the oxygen tank pressurizing constant pressure pump inlet pipeline, and an oxygen tank inlet valve is provided on the oxygen tank pressurizing constant pressure pump outlet pipeline;

[0015] A water supply fuel tank liquid supply valve is provided on the fuel tank pressurizing constant pressure pump inlet pipeline, and a fuel tank inlet valve is provided on the fuel tank pressurizing constant pressure pump outlet pipeline;

[0016] The water supply oxygen tank liquid supply valve and the oxygen tank inlet valve are both connected to the oxygen tank pressurizing control device, and the water supply fuel tank liquid supply valve and the fuel tank inlet valve are both connected to the fuel tank pressurizing control device.

[0017] According to the rocket tank bursting test control system provided by the present utility model, the water supply tank is connected with a water supply tank liquid level gauge, and the water supply tank liquid level gauge is connected to the water injection and make-up control device for remotely monitoring the liquid level in the water supply tank;

[0018] The oxygen tank is connected with an oxygen tank liquid level gauge, and the oxygen tank liquid level gauge is connected with a water injection and replenishment control device for remotely monitoring the liquid level in the oxygen tank;

[0019] The fuel tank is connected with a fuel tank liquid level gauge, and the fuel tank liquid level gauge is connected with a water injection and replenishment control device for remotely monitoring the liquid level in the fuel tank.

[0020] According to the rocket tank bursting test control system provided by the present utility model, the water supply tank is connected with a water supply tank exhaust pipeline, and a water supply tank exhaust valve is arranged on the water supply tank exhaust pipeline. The water supply tank exhaust valve is connected with the water injection and replenishment control device for opening and closing the water supply tank exhaust pipeline.

[0021] According to the rocket tank bursting test control system provided by the present utility model, the oxygen tank is connected with an oxygen tank overflow exhaust and drainage pipeline, and an oxygen tank overflow exhaust and drainage valve is arranged on the oxygen tank overflow exhaust and drainage pipeline. The oxygen tank overflow exhaust and drainage valve is connected with the water injection and replenishment control device for opening and closing the oxygen tank overflow exhaust and drainage pipeline;

[0022] The oxygen tank overflow exhaust and drainage pipeline is connected with an oxygen tank pressure sensor, and the oxygen tank pressure sensor is connected with an oxygen tank pressurization control device for remotely monitoring the pressure value in the oxygen tank.

[0023] According to the rocket tank bursting test control system provided by the present utility model, the fuel tank is connected with a fuel tank overflow exhaust and drainage pipeline, and a fuel tank overflow exhaust and drainage valve is arranged on the fuel tank overflow exhaust and drainage pipeline. The fuel tank overflow exhaust and drainage valve is connected with the water injection and replenishment control device for opening and closing the fuel tank overflow exhaust and drainage pipeline;

[0024] The fuel tank overflow exhaust and drainage pipeline is connected with a fuel tank pressure sensor, and the fuel tank pressure sensor is connected with a fuel tank pressurization control device for remotely monitoring the pressure value in the fuel tank.

[0025] According to the rocket tank bursting test control system provided by the present utility model, the oxygen tank is connected with an oxygen tank bottom drainage pipeline, and an oxygen tank bottom drainage valve is arranged on the oxygen tank bottom drainage pipeline. The oxygen tank bottom drainage valve is connected with the oxygen tank pressurization control device for opening and closing the oxygen tank bottom drainage pipeline;

[0026] The fuel tank is connected with a fuel tank bottom drainage pipeline, and a fuel tank bottom drainage valve is arranged on the fuel tank bottom drainage pipeline. The fuel tank bottom drainage valve is connected with the fuel tank pressurization control device for opening and closing the fuel tank bottom drainage pipeline.

[0027] According to the above specific embodiments of the present utility model, it has at least the following beneficial effects: The rocket tank bursting test control system provided by the present utility model performs interlock control on the liquid supply centrifugal pump inlet valve, the water supply tank make-up valve, the oxygen tank water injection valve, the fuel tank water injection valve, the water supply tank exhaust valve, the oxygen tank overflow exhaust and drain valve, the fuel tank overflow exhaust and drain valve, the liquid supply centrifugal pump, the water supply tank level gauge, the oxygen tank level gauge, and the fuel tank level gauge by setting up a water injection and make-up control device and using the water injection and make-up control device. By setting up an oxygen tank pressurization control device and using the oxygen tank pressurization control device to perform interlock control on the water supply oxygen tank liquid supply valve, the oxygen tank inlet valve, the oxygen tank overflow exhaust and drain valve, the oxygen tank bottom drain valve, the oxygen tank pressurization constant pressure pump, and the oxygen tank pressure sensor, and by setting up a fuel tank pressurization control device and using the fuel tank pressurization control device to perform interlock control on the water supply fuel tank liquid supply valve, the fuel tank inlet valve, the fuel tank overflow exhaust and drain valve, the fuel tank bottom drain valve, the fuel tank pressurization constant pressure pump, and the fuel tank pressure sensor, it can perform online automatic control on the pressurized internal pressure bursting test of the rocket stainless steel tank. Compared with manual operation, it can improve the working efficiency of the test and the accuracy of test control.

[0028] The rocket tank bursting test control system provided by the present utility model uses liquid to pressurize the rocket stainless steel tank, which can reduce the gas volume incorporated in the tank, reduce the damage risk during the tank bursting test, and improve safety. During the short-cycle test time, compared with using deionized water, using fire water as the pressurization medium has a lower investment cost.

[0029] It should be understood that the above general description and the following specific embodiments are only exemplary and explanatory, and they cannot limit the scope claimed by the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following attached drawings are part of the specification of the present utility model, which show the embodiments of the present utility model. The attached drawings, together with the description of the specification, are used to illustrate the principle of the present utility model.

[0031] Figure 1 It is a schematic structural diagram of the rocket tank bursting test control system provided by an embodiment of the present utility model.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS

[0033] K0: Water injection and make-up control device; K1: Oxygen tank pressurization control device; K2: Fuel tank pressurization control device;

[0034] O: Oxygen tank; R: Fuel tank; H: Water supply tank; X: Fire water pool;

[0035] E0: Liquid supply centrifugal pump; E1: Oxygen tank pressurization constant pressure pump; E2: Fuel tank pressurization constant pressure pump;

[0036] A0: Inlet valve of the water supply centrifugal pump; A1: Make-up water valve of the water supply storage tank; A2: Water injection valve of the oxygen tank; A3: Water injection valve of the fuel tank;

[0037] B0: Exhaust valve of the water supply storage tank; B1: Liquid supply valve from the water supply oxygen tank; B2: Inlet valve of the oxygen tank; B3: Overflow exhaust and drainage valve of the oxygen tank; B4: Bottom drainage valve of the oxygen tank;

[0038] C1: Liquid supply valve from the water supply fuel tank; C2: Inlet valve of the fuel tank; C3: Overflow exhaust and drainage valve of the fuel tank; C4: Bottom drainage valve of the fuel tank;

[0039] a0: Fire fighting pipeline; a1: Water supply pipeline; a2: Water injection pipeline of the oxygen tank; a3: Water injection pipeline of the fuel tank; a4: Exhaust pipeline of the water supply storage tank;

[0040] b1: Inlet pipeline of the oxygen tank booster constant pressure pump; b2: Outlet pipeline of the oxygen tank booster constant pressure pump; b3: Overflow exhaust and drainage pipeline of the oxygen tank; b4: Bottom drainage pipeline of the oxygen tank;

[0041] c1: Inlet pipeline of the fuel tank booster constant pressure pump; c2: Outlet pipeline of the fuel tank booster constant pressure pump; c3: Overflow exhaust and drainage pipeline of the fuel tank; c4: Bottom drainage pipeline of the fuel tank;

[0042] G: Filter before the pump; F1: First drain valve; F2: Second drain valve; F3: Third drain valve;

[0043] L1: Liquid level gauge of the water supply storage tank; L2: Liquid level gauge of the oxygen tank; L3: Liquid level gauge of the fuel tank;

[0044] P1: Pressure sensor of the oxygen tank; P2: Pressure sensor of the fuel tank. Detailed implementation mode

[0045] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer and more understandable, the following will clearly explain the spirit of the content disclosed by the present utility model with reference to the drawings and detailed descriptions. After any person skilled in the relevant technical field understands the embodiments of the content of the present utility model, they can make changes and modifications based on the techniques taught by the content of the present utility model, which do not deviate from the spirit and scope of the content of the present utility model.

[0046] The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model, but do not limit the present utility model. In addition, the same or similar reference numerals of elements / components used in the drawings and embodiments are used to represent the same or similar parts.

[0047] Regarding the use of "first", "second",... etc. in this article, it does not particularly refer to the order or sequence, nor is it used to limit the present utility model. It is only used to distinguish elements or operations described with the same technical terms.

[0048] Regarding the directional terms used in this text, such as: up, down, left, right, front or back, etc., they are only references to the directions in the attached drawings. Therefore, the directional terms used are for illustration purposes and not for limiting this creation.

[0049] Regarding the terms "comprising", "including", "having", "containing", etc. used in this text, they are all open-ended terms, meaning including but not limited to.

[0050] Regarding the "and / or" used in this text, it includes any one or all combinations of the described things.

[0051] Regarding the "multiple" in this text, it includes "two" and "more than two"; regarding the "multiple groups" in this text, it includes "two groups" and "more than two groups".

[0052] Regarding the terms "substantially", "about", etc. used in this text, they are used to modify any quantity or error that can vary slightly, but these slight variations or errors do not change its essence. Generally, the range of such slight variations or errors modified by such terms can 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.

[0053] Certain terms used to describe this utility model will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in the description of this utility model.

[0054] In the prior art, the usual test process for the internal pressure test of a rocket tank is as follows:

[0055] First, fill the rocket stainless steel tank with water, and then use nitrogen to conduct a pressurization test on the tank.

[0056] It should be noted that the unique ductility range of stainless steel material (about 10% to 25%) means that during the gas filling and pressure increase process, the stainless steel tank will expand to a certain extent. When the pressure continues to increase to reach the bursting limit of the tank material, a violent bursting phenomenon may occur, accompanied by a powerful shock wave, which will undoubtedly pose a certain safety risk to the infrastructure and personnel safety at the test site.

[0057] In view of the risk impact of using gas pressurization test for rocket tanks, this utility model adopts a control system for internal pressure pressurization bursting test of rocket tanks by replacing liquid with gas, which can better avoid the bursting shock risk generated when the tank bursts.

[0058] Such as Figure 1As shown in the figure, the rocket tank bursting test control system provided by the present utility model is used for online control of the pressurized internal pressure bursting test of the rocket stainless steel tank, and it includes a water injection and replenishment control device K0, an oxygen tank pressurization control device K1, and a fuel tank pressurization control device K2.

[0059] The rocket stainless steel tank adopts a common-bottom structure tank. The upper part of the tank is an oxygen tank O for filling liquid oxygen propellant; the lower part of the tank is a fuel tank R for filling liquid methane propellant. The water injection and replenishment control device K0 is used to control the water supply centrifugal pump E0 to fill water into the water supply storage tank H for pressurization, as well as the oxygen tank O and the fuel tank R in the rocket stainless steel tank. The water supply storage tank H is used to provide a water source for liquid pressurization for the oxygen tank O and the fuel tank R; after the water supply storage tank H is filled with water, the water supply centrifugal pump E0 is controlled to stop working. The oxygen tank pressurization control device K1 is used to control the oxygen tank pressurization constant pressure pump E1 to take water from the water supply storage tank H and then gradually pressurize the oxygen tank O by injecting water. The fuel tank pressurization control device K2 is used to control the fuel tank pressurization constant pressure pump E2 to take water from the water supply storage tank H and then gradually pressurize the fuel tank R by injecting water.

[0060] Complete the first-stage fuel tank R pressurization, the second-stage fuel tank R pressurization, and the third-stage bursting test in sequence according to the test requirements. During the process of gradually pressurizing the oxygen tank O and the fuel tank R by injecting water, the water injection and replenishment control device K0 can automatically inject water and replenish the water supply storage tank H according to the liquid level value in the water supply storage tank H.

[0061] The rocket tank bursting test control system provided by the present utility model can realize the online automatic control of the test. Compared with manual operation, it can improve the working efficiency of the test and the accuracy of test control. Using liquid to pressurize the rocket stainless steel tank can reduce the gas volume incorporated in the tank and reduce the destruction risk generated during the tank bursting test.

[0062] In a specific embodiment, the water supply storage tank H is connected to the fire protection pipeline a0 through a water supply pipeline a1, and the fire protection pipeline a0 is connected to a fire protection pool X. The fire protection pool X is a fire protection pool for a liquid oxygen / methane liquid rocket engine test stand, and is used to provide a water source for the water supply storage tank H and the rocket stainless steel tank. The oxygen tank O in the rocket stainless steel tank is connected to the fire protection pipeline a0 through an oxygen tank water injection pipeline a2, and the fuel tank R in the rocket stainless steel tank is connected to the fire protection pipeline a0 through a fuel tank water injection pipeline a3.

[0063] In the above embodiment, the water supply centrifugal pump E0 is arranged on the fire protection pipeline a0. The water supply centrifugal pump E0 is a horizontal variable-frequency centrifugal pump, and is used to inject water and replenish the water supply storage tank H, as well as the oxygen tank O and the fuel tank R in the rocket stainless steel tank through the fire protection pool X.

[0064] The water supply tank H is connected to the oxygen tank O through the oxygen tank booster constant pressure pump inlet pipe b1, the oxygen tank booster constant pressure pump E1 and the oxygen tank booster constant pressure pump outlet pipe b2 in sequence. Among them, the oxygen tank booster constant pressure pump E1 adopts a constant pressure variable frequency vertical centrifugal pump with a constant pressure stabilizing gas cylinder, which is used to inject water into the oxygen tank O and boost the pressure.

[0065] The oxygen tank booster constant pressure pump E1 comes with a constant pressure stabilizing gas cylinder to ensure the stability of the tank pressure during the test boost and pressure relief process. Compared with the traditional non-constant pressure centrifugal pump that requires a separate booster constant pressure integrated system, the process system of this utility model is more concise and optimized.

[0066] The water supply tank H is connected to the fuel tank R through the fuel tank boosting constant pressure pump inlet pipe c1, the fuel tank boosting constant pressure pump E2 and the fuel tank boosting constant pressure pump outlet pipe c2 in sequence. Among them, the fuel tank boosting constant pressure pump E2 adopts a constant pressure variable frequency vertical centrifugal pump with a constant pressure stabilizing gas cylinder, which is used to inject water and pressurize the fuel tank R.

[0067] The fuel tank booster constant pressure pump E2 comes with a constant pressure stabilizing gas cylinder to ensure the stability of the tank pressure during the test booster and pressure relief process. Compared with the traditional non-constant pressure centrifugal pump that requires a separate booster constant pressure integrated system, the process system of this utility model is more concise and optimized.

[0068] In the above embodiment, the water supply centrifugal pump E0 is arranged on the fire-fighting pipe a0, and the water supply centrifugal pump inlet valve A0 is also arranged on the fire-fighting pipe a0, and the water supply centrifugal pump inlet valve A0 is used to open and close the fire-fighting pipe a0, and the water supply centrifugal pump E0 is used to pump out water from the fire-fighting water tank X through the fire-fighting pipe a0. The water supply pipe a1 is provided with a water supply tank replenishment valve A1, and the water supply tank replenishment valve A1 is used to open and close the water supply pipe a1. The water supply centrifugal pump inlet valve A0 and the water supply tank replenishment valve A1 both adopt switch-controlled pneumatic stop valves.

[0069] The oxygen tank water injection pipeline a2 is provided with an oxygen tank water injection valve A2, which is used to open and close the oxygen tank water injection pipeline a2. The fuel tank water injection pipeline a3 is provided with a fuel tank water injection valve A3, which is used to open and close the fuel tank water injection pipeline a3. Both the oxygen tank water injection valve A2 and the fuel tank water injection valve A3 adopt switch-controlled pneumatic stop valves.

[0070] In the above embodiment, a pre-pump filter G is also provided on the fire-fighting pipe a0, and the pre-pump filter G is used to filter impurities in the fire-fighting water extracted by the water supply centrifugal pump E0 from the fire-fighting water tank X. A first drain valve F1 is provided on the fire-fighting pipe a0 on the side opposite to the side where the water supply centrifugal pump E0 is connected to the pre-pump filter G, and the first drain valve F1 is used to drain the water in the fire-fighting pipe a0.

[0071] In the above embodiment, a water supply oxygen tank liquid delivery valve B1 is provided on the liquid inlet pipe b1 of the oxygen tank booster constant pressure pump, and an oxygen tank liquid inlet valve B2 is provided on the liquid outlet pipe b2 of the oxygen tank booster constant pressure pump. The water supply oxygen tank liquid delivery valve B1 is provided near the first liquid outlet of the water supply storage tank H, and the oxygen tank liquid inlet valve B2 is provided near the liquid inlet of the oxygen tank O.

[0072] The water supply oxygen tank liquid delivery valve B1 and the oxygen tank liquid inlet valve B2 are both switch-controlled pneumatic stop valves. Located on both sides of the oxygen tank booster constant pressure pump E1, a second drain valve F2 is provided on the oxygen tank booster constant pressure pump liquid inlet pipe b1 and the oxygen tank booster constant pressure pump liquid outlet pipe b2. The second drain valve F2 is used to drain the water in the oxygen tank booster constant pressure pump liquid inlet pipe b1.

[0073] In the above embodiment, a water supply fuel tank liquid delivery valve C1 is provided on the liquid inlet pipe c1 of the fuel tank boosting constant pressure pump, and a fuel tank liquid inlet valve C2 is provided on the liquid outlet pipe c2 of the fuel tank boosting constant pressure pump. The water supply fuel tank liquid delivery valve C1 is provided near the second liquid outlet of the water supply tank H, and the fuel tank liquid inlet valve C2 is provided near the liquid inlet of the fuel tank R.

[0074] The water supply fuel tank liquid delivery valve C1 and the fuel tank liquid inlet valve C2 are both switch-controlled pneumatic stop valves. Located on both sides of the fuel tank booster constant pressure pump E2, a third drain valve F3 is provided on the fuel tank booster constant pressure pump liquid inlet pipe c1 and the fuel tank booster constant pressure pump liquid outlet pipe c2. The third drain valve F3 is used to drain the water in the fuel tank booster constant pressure pump liquid inlet pipe c1.

[0075] In the above embodiment, the water supply tank H is connected to a water supply tank level meter L1, and the water supply tank level meter L1 is connected to the water injection and replenishment control device K0 for remotely monitoring the liquid level in the water supply tank H.

[0076] The oxygen tank O is connected to an aerobic tank level gauge L2, and the oxygen tank level gauge L2 is connected to a water injection and replenishment control device K0, so as to monitor the liquid level in the oxygen tank O remotely.

[0077] The fuel tank R is connected to a fuel tank liquid level gauge L3, which is connected to a water injection and replenishment control device K0 for remotely monitoring the liquid level in the fuel tank R.

[0078] In the above embodiment, a water supply tank exhaust pipe a4 is provided on the top of the water supply tank H, and a water supply tank exhaust valve B0 is provided on the water supply tank exhaust pipe a4. The water supply tank exhaust valve B0 is connected to the water injection and replenishment control device K0 and is used to open and close the water supply tank exhaust pipe a4. The water supply tank exhaust valve B0 adopts a switch-controlled pneumatic stop valve.

[0079] An oxygen box overflow exhaust and drainage pipe b3 is provided at the top of the oxygen box O, and an oxygen box overflow exhaust and drainage valve B3 is provided on the oxygen box overflow exhaust and drainage pipe b3. The oxygen box overflow exhaust and drainage valve B3 is connected to the water injection and replenishment control device K0, and is used to open and close the oxygen box overflow exhaust and drainage pipe b3. The oxygen box overflow exhaust and drainage valve B3 adopts a switch-controlled pneumatic stop valve. The oxygen box overflow exhaust and drainage pipe b3 is connected to the oxygen box pressure sensor P1, and the oxygen box pressure sensor P1 is connected to the oxygen box pressurization control device K1, and is used to remotely monitor the pressure value in the oxygen box O.

[0080] A fuel tank overflow exhaust and liquid drainage pipeline c3 is provided at the top of the fuel tank R, and a fuel tank overflow exhaust and liquid drainage valve C3 is provided on the fuel tank overflow exhaust and liquid drainage pipeline c3. The fuel tank overflow exhaust and liquid drainage valve C3 is connected to the water injection and replenishment control device K0, and is used to open and close the fuel tank overflow exhaust and liquid drainage pipeline c3. The fuel tank overflow exhaust and liquid drainage valve C3 adopts a switch-controlled pneumatic stop valve. The fuel tank overflow exhaust and liquid drainage pipeline c3 is connected to a fuel tank pressure sensor P2, and the fuel tank pressure sensor P2 is connected to the fuel tank boost control device K2, and is used to remotely monitor the pressure value in the fuel tank R.

[0081] In the above embodiment, the bottom of the oxygen box O is connected to the oxygen box bottom drainage pipe b4, and the oxygen box bottom drainage pipe b4 is provided with an oxygen box bottom drainage valve B4, which is connected to the oxygen box boost control device K1 and is used to open and close the oxygen box bottom drainage pipe b4. The oxygen box bottom drainage valve B4 adopts a switch-controlled pneumatic stop valve.

[0082] The bottom of the fuel tank R is connected to a fuel tank bottom drain pipe c4, on which a fuel tank bottom drain valve C4 is provided, which is connected to the fuel tank boost control device K2 and is used to open and close the fuel tank bottom drain pipe c4. The fuel tank bottom drain valve C4 uses a switch-controlled pneumatic stop valve.

[0083] In the above embodiments, the water injection and replenishment control device K0 is connected to the water supply centrifugal pump inlet valve A0, the water supply tank replenishment valve A1, the oxygen tank water injection valve A2, the fuel tank water injection valve A3, the water supply tank exhaust valve B0, the oxygen tank overflow exhaust and drain valve B3, the fuel tank overflow exhaust and drain valve C3, the water supply centrifugal pump E0, the water supply tank liquid level gauge L1, the oxygen tank liquid level gauge L2, and the fuel tank liquid level gauge L3. The water supply tank liquid level gauge L1, the oxygen tank liquid level gauge L2 and The fuel tank liquid level meter L3 sends the detected liquid level information to the water injection and replenishment control device K0. The water injection and replenishment control device K0 controls the water supply centrifugal pump inlet valve A0, the water supply tank replenishment valve A1, the oxygen tank water injection valve A2 and the fuel tank water injection valve A3 to open or close according to the received liquid level information, and controls the water supply centrifugal pump E0 to start or stop the action, so as to control the water supply tank H, the oxygen tank O and the fuel tank R to perform water injection and replenishment or stop the water injection and replenishment operation. The water injection and replenishment control device K0 is also used to remotely control the water supply tank exhaust valve B0, the oxygen tank overflow exhaust and liquid discharge valve B3 and the fuel tank overflow exhaust and liquid discharge valve C3, so as to perform exhaust or liquid discharge operations on the water supply tank H, the oxygen tank O and the fuel tank R.

[0084] The oxygen tank boost control device K1 is connected to the water supply oxygen tank liquid delivery valve B1, the oxygen tank liquid inlet valve B2, the oxygen tank overflow exhaust and drain valve B3, the oxygen tank bottom drain valve B4, the oxygen tank boost constant pressure pump E1 and the oxygen tank pressure sensor P1, and performs remote interlocking control on the water supply oxygen tank liquid delivery valve B1, the oxygen tank liquid inlet valve B2, the oxygen tank overflow exhaust and drain valve B3, the oxygen tank bottom drain valve B4, the oxygen tank boost constant pressure pump E1 and the oxygen tank pressure sensor P1.

[0085] The fuel tank boost control device K2 is connected to the water supply fuel tank liquid delivery valve C1, the fuel tank liquid inlet valve C2, the fuel tank overflow exhaust drain valve C3, the fuel tank bottom drain valve C4, the fuel tank boost constant pressure pump E2 and the fuel tank pressure sensor P2, and performs remote interlocking control on the water supply fuel tank liquid delivery valve C1, the fuel tank liquid inlet valve C2, the fuel tank overflow exhaust drain valve C3, the fuel tank bottom drain valve C4, the fuel tank boost constant pressure pump E2 and the fuel tank pressure sensor P2.

[0086] Based on the rocket tank blasting test control system provided by the utility model, the utility model also provides a rocket tank blasting test control method, which includes the following steps:

[0087] S1. Water supply and replenishment stage before the test:

[0088] The water injection and replenishment control device K0 controls the opening of the fire-fighting pipe a0, the water supply pipe a1 and the oxygen tank water injection pipe a2 to inject water into the water supply tank H and the oxygen tank O; when the oxygen tank O is filled with water, the fuel tank water injection pipe a3 is controlled to be opened to inject water into the fuel tank R. By first filling the oxygen tank O with water and then injecting water into the fuel tank R, it is possible to prevent the problem that the common bottom tank may be damaged by the back pressure shock caused by the first injection of water into the fuel tank R.

[0089] Specifically, the water injection and replenishment control device K0 remotely controls the opening of the water supply tank exhaust valve B0, the oxygen tank overflow exhaust and drain valve B3 and the fuel tank overflow exhaust and drain valve C3, so that the water supply tank H, the oxygen tank O and the fuel tank R are connected to the atmosphere, and the gases in the water supply tank H, the oxygen tank O and the fuel tank R are discharged into the atmosphere through the water supply tank exhaust pipe a4, the oxygen tank overflow exhaust and drain pipe b3 and the fuel tank overflow exhaust and drain pipe c3.

[0090] The water injection and replenishment control device K0 controls the opening of the water supply centrifugal pump inlet valve A0, the water supply centrifugal pump E0, the water supply tank replenishment valve A1 and the oxygen tank filling valve A2, so that the fire water in the fire water pool X flows into the water supply tank H through the fire pipe a0 and the water supply pipe a1, and flows into the oxygen tank O through the fire pipe a0 and the oxygen tank filling pipe a2, so as to perform water injection operations on the water supply tank H and the oxygen tank O.

[0091] The water supply tank level meter L1 sends the detected liquid level value to the water injection and replenishment control device K0. When the water injection and replenishment control device K0 determines that the liquid level in the water supply tank H reaches the preset high liquid level value, the water injection and replenishment control device K0 controls the closure of the water supply tank replenishment valve A1 to stop injecting water into the water supply tank H.

[0092] The oxygen tank liquid level meter L2 sends the detected liquid level value to the water injection and replenishment control device K0. When the water injection and replenishment control device K0 determines that the liquid level in the oxygen tank O reaches the preset maximum liquid level value of the oxygen tank O (i.e., the tank is full), the water injection and replenishment control device K0 controls the closing of the oxygen tank water injection valve A2 to stop injecting water into the oxygen tank O.

[0093] The water injection and replenishment control device K0 controls the fuel tank water injection valve A3 to open, so that the fire water in the fire water pool X flows into the fuel tank R through the fire pipe a0 and the fuel tank water injection pipe a3, so as to perform water injection operation on the fuel tank R.

[0094] The fuel tank liquid level meter L3 sends the detected liquid level value to the water injection and replenishment control device K0. When the water injection and replenishment control device K0 determines that the liquid level in the fuel tank R reaches the preset maximum liquid level value of the fuel tank R (i.e., the tank is full), the water injection and replenishment control device K0 controls the closure of the fuel tank water injection valve A3 to stop injecting water into the fuel tank R.

[0095] S2. The first stage of the internal pressure explosion test of the rocket stainless steel tank:

[0096] The fuel tank R is pressurized to the first pressure value Ps1 before the rear bottom equatorial plane of the tank becomes unstable, and the changes in the material, process structure performance, etc. of the first stage test tank at the first pressure value before the rear bottom equatorial plane becomes unstable are determined.

[0097] Specifically, according to the test operation step requirements, the oxygen tank pressurization control device K1 and the fuel tank pressurization control device K2 are set with automatic control timing: with 0.1MPa as the first-level pressurization level, the fuel tank R is loaded step by step to the first pressure value Ps1; the oxygen tank O is loaded step by step to Ps1+0.1MPa. Subsequently, the oxygen tank O and the fuel tank R are depressurized step by step to 0MPa. When the level is reduced, the internal pressure of the fuel tank R is first reduced to the next level by 0.1MPa, and then the internal pressure of the oxygen tank O is reduced to the next level.

[0098] The first stage of pressurization test:

[0099] The oxygen box pressurization control device K1 controls the closing of the oxygen box overflow exhaust and liquid discharge valve B3, and then controls the opening of the water supply oxygen box liquid delivery valve B1, the oxygen box pressurization constant pressure pump E1 and the oxygen box liquid inlet valve B2. The water in the water supply tank H is transported to the oxygen box O through the oxygen box pressurization constant pressure pump liquid inlet pipe b1 to pressurize the liquid in the oxygen box O.

[0100] When the pressure value in the oxygen tank O detected by the oxygen tank pressure sensor P1 reaches 0.1MPa, the fuel tank pressurization control device K2 is started. The fuel tank pressurization control device K2 controls the fuel tank overflow exhaust and liquid discharge valve C3 to be closed, and then controls the water supply fuel tank liquid delivery valve C1, the fuel tank pressurization constant pressure pump E2 and the fuel tank liquid inlet valve C2 to be opened, and the water in the water supply tank H is delivered to the fuel tank R through the fuel tank pressurization constant pressure pump liquid inlet pipe c1 to pressurize the fuel tank R liquid.

[0101] When the pressure value in the fuel tank R detected by the fuel tank pressure sensor P2 reaches 0.1MPa, the oxygen tank pressure boost control device K1 is started again to increase the pressure value in the oxygen tank O by 0.2MPa; then the fuel tank pressure boost control device K2 is started to increase the pressure value in the fuel tank R by 0.2MPa. The oxygen tank O and the fuel tank R are pressurized alternately with 0.1MPa as the first-level pressure boosting level. When the pressure value in the oxygen tank O detected by the oxygen tank pressure sensor P1 is Ps1+0.1MPa, and the pressure value in the fuel tank R detected by the fuel tank pressure sensor P2 is Ps1MPa, the oxygen tank pressure boost control device K1 controls the closing of the water supply oxygen tank liquid delivery valve B1, the oxygen tank pressure boosting constant pressure pump E1, and the oxygen tank liquid inlet valve B2 in sequence, and the fuel tank pressure boost control device K2 controls the closing of the water supply fuel tank liquid delivery valve C1, the fuel tank pressure boosting constant pressure pump E2, and the fuel tank liquid inlet valve C2 in sequence to stop pressurizing the oxygen tank O and the fuel tank R.

[0102] Then the water supply tank H is depressurized:

[0103] The fuel tank pressure boost control device K2 controls the fuel tank bottom drain valve C4 to open and depressurize the fuel tank R. The water in the fuel tank R is discharged through the fuel tank bottom drain pipe c4. When the pressure value in the fuel tank R detected by the fuel tank pressure sensor P2 drops by 0.1 MPa, the fuel tank bottom drain valve C4 is controlled to close.

[0104] The oxygen tank pressure boosting control device K1 controls the opening of the bottom drainage valve B4 of the oxygen tank according to the pressure value in the fuel tank R detected by the fuel tank pressure sensor P2, and the water in the oxygen tank O is discharged through the bottom drainage pipeline b4 of the oxygen tank. When the pressure value in the oxygen tank O detected by the oxygen tank pressure sensor P1 drops by 0.1 MPa, the control closes the bottom drainage valve B4 of the oxygen tank. Then, the pressure reduction of the fuel tank R is started, and when the oxygen tank O and the fuel tank R are alternately depressurized to 0 MPa, the first-stage pressure boosting test is completed, and the parameters obtained from the test are recorded. Step-by-step pressure reduction can prevent the counter-pressure impact of the co-bottom structure storage tank and avoid rupture.

[0105] During the pressure boosting process, when the liquid level value of the water supply storage tank H detected by the water supply storage tank liquid level gauge L1 reaches the preset low liquid level value, the water injection and replenishment control device K0 controls the opening of the liquid inlet valve A0 of the water supply centrifugal pump, the water supply centrifugal pump E0, and the water supply storage tank replenishment valve A1 to replenish water to the water supply storage tank H. When the liquid level value of the water supply storage tank H detected by the water supply storage tank liquid level gauge L1 reaches the preset high liquid level value, the water injection and replenishment control device K0 controls the closing of the liquid inlet valve A0 of the water supply centrifugal pump, the water supply centrifugal pump E0, and the water supply storage tank replenishment valve A1 to stop replenishing water to the water supply storage tank H.

[0106] S3. The second stage during the internal pressure bursting test of the rocket stainless steel storage tank:

[0107] Pressurize the fuel tank R to the second pressure value Ps2 after the instability and before the failure of the bottom equatorial plane of the storage tank, and determine the changes in the material, process structure performance, etc. of the test storage tank at the second pressure value after the instability and before the failure of the bottom equatorial plane.

[0108] Specifically, the second-stage pressure boosting test:

[0109] After the first-stage pressure boosting test is completed, the oxygen tank O and the fuel tank R are automatically boosted step by step again according to the automatic control operation steps of the first-stage pressure boosting experiment. With 0.1 MPa as a pressure boosting level, the fuel tank R is boosted step by step to the second pressure value Ps2; the oxygen tank O is boosted step by step to Ps2 + 0.1 MPa.

[0110] Subsequently, the pressure reduction of the storage tank is carried out:

[0111] Implemented according to the automatic pressure reduction operation steps of the first-stage pressure boosting test, the oxygen tank O and the fuel tank R are depressurized step by step to 0 MPa. When reducing the pressure level by level, first reduce the internal pressure of the fuel tank R by 0.1 MPa level to the next level, and then reduce the internal pressure of the oxygen tank O to the next level, and gradually complete the pressure reduction of the rocket stainless steel storage tank. The second-stage pressure boosting test is completed, and the parameters obtained from the test are recorded.

[0112] S4. The third stage during the internal pressure burst test of the rocket stainless steel storage tank: Conduct a burst test on the rocket stainless steel storage tank. The process is as follows:

[0113] Gradually increase the pressure of the oxygen tank O to stop the pressure increase when bursting occurs, or stop the pressure increase when the oxygen tank O is pressurized to the preset maximum pressure value Po of the oxygen tank O and the oxygen tank O does not burst.

[0114] Gradually increase the pressure of the fuel tank R to the preset maximum pressure value Pr of the fuel tank R, and then stop the pressure increase. Among them, the maximum pressure value Pr of the fuel tank R is the pressure to prevent the anti-backpressure impact when the oxygen tank O bursts.

[0115] Determine the changes in the material, process structure performance, etc. of the storage tank after the oxygen tank O bursts or at the maximum pressure value during the third stage test.

[0116] Specifically, the pressure increase test in the third stage:

[0117] After refilling the oxygen tank O and the fuel tank R with water according to the automatic control operation steps in the water injection and replenishment stage of the rocket stainless steel storage tank, then perform step-by-step automatic pressure increase according to the automatic control steps in the first stage. With 0.1 MPa as one pressure increase level, when the fuel tank R is gradually pressurized to the maximum pressure value Pr of the fuel tank R, stop the pressure increase of the fuel tank R; when the oxygen tank O is gradually pressurized until bursting and the pressure P1 of the oxygen tank O suddenly drops, stop the pressure increase of the oxygen tank O, or when the oxygen tank O is gradually pressurized to the required maximum pressure value Po, stop the pressure increase of the oxygen tank O.

[0118] Subsequently, perform the pressure reduction of the storage tank:

[0119] Implement according to the automatic pressure reduction operation steps in the first stage pressure increase test. The oxygen tank O and the fuel tank R are gradually depressurized to 0 MPa. When reducing the pressure in levels, first reduce the internal pressure of the fuel tank R to the next level by 0.1 MPa, and then reduce the internal pressure of the oxygen tank O to the next level, gradually completing the pressure reduction of the rocket stainless steel storage tank. The pressure increase test in the third stage is completed, and record the parameters obtained from the test.

[0120] S5. The water injection and replenishment control device K0 controls to close the exhaust passage of the water supply storage tank H, and drain the water in the fire fighting pipeline a0, the liquid inlet pipeline b1 of the oxygen tank pressure increasing constant pressure pump, and the liquid inlet pipeline c1 of the fuel tank pressure increasing constant pressure pump.

[0121] Specifically, when the pressure increase test in the third stage is completed, the water injection and replenishment control device K0 controls to close the exhaust valve B0 of the water supply storage tank, then manually open all the first drain valve F1, the second drain valve F2, and the third drain valve F3 on the pipeline. After the pipeline is drained, close the first drain valve F1, the second drain valve F2, and the third drain valve F3, and the internal pressure burst test of the rocket stainless steel storage tank is completed.

[0122] The rocket tank bursting test control system and control method provided by the present utility model can realize the online automatic control function of the test. Compared with manual operation, it can improve the working efficiency of the test and the accuracy of test control. Pressurizing the rocket stainless steel tank with liquid can reduce the gas volume incorporated in the rocket stainless steel tank and reduce the damage risk generated during the tank bursting test.

[0123] The above are only the schematic specific embodiments of the present utility model. Without departing from the concept and principle of the present utility model, any equivalent changes and modifications made by any person skilled in the art shall fall within the scope of protection of the present utility model.

Claims

1. A rocket tank explosion test control system, used for online control of the rocket stainless steel tank pressurization internal pressure explosion test, characterized in that: It includes a water injection and replenishment control device, an oxygen tank pressurization control device and a fuel tank pressurization control device; The rocket stainless steel tank adopts a common bottom structure tank, the upper part of the tank is an oxygen tank, the oxygen tank is used to fill liquid oxygen propellant; the lower part of the tank is a fuel tank, the fuel tank is used to fill liquid methane propellant; the oxygen tank and the fuel tank are both connected to a water supply tank; the water supply tank is used to provide a water source for liquid pressurization for the oxygen tank and the fuel tank; The water injection and replenishment control device is used to control the water filling of the water supply tank, the oxygen tank and the fuel tank; the oxygen tank pressurization control device is used to control the water supply tank to inject water and pressurize the oxygen tank step by step; the fuel tank pressurization control device is used to control the water supply tank to inject water and pressurize the fuel tank step by step; so as to complete the pressurized internal pressure explosion test of the rocket stainless steel tank.

2. The rocket tank explosion test control system according to claim 1, characterized in that: The water supply tank is connected to the fire-fighting pipe through a water supply pipe, and the fire-fighting pipe is used to connect to a water source; the oxygen box is connected to the fire-fighting pipe through an oxygen box water injection pipe, and the fuel box is connected to the fire-fighting pipe through a fuel box water injection pipe.

3. The rocket tank explosion test control system according to claim 2, characterized in that: The fire-fighting pipeline is provided with a water supply centrifugal pump and a water supply centrifugal pump inlet valve, and the water supply centrifugal pump inlet valve is used to open and close the fire-fighting pipeline; the water supply pipeline is provided with a water supply tank water replenishment valve, and the water supply tank water replenishment valve is used to open and close the water supply pipeline; The oxygen box water injection pipeline is provided with an oxygen box water injection valve, and the oxygen box water injection valve is used to open and close the oxygen box water injection pipeline; the fuel box water injection pipeline is provided with a fuel box water injection valve, and the fuel box water injection valve is used to open and close the fuel box water injection pipeline; The water supply centrifugal pump, the water supply centrifugal pump liquid inlet valve, the water supply tank water replenishment valve, the oxygen tank water injection valve and the fuel tank water injection valve are all connected to the water injection and replenishment control device.

4. The rocket tank explosion test control system according to claim 2, characterized in that: The water supply tank is connected to the oxygen tank in sequence through the oxygen tank booster constant pressure pump inlet pipe, the oxygen tank booster constant pressure pump and the oxygen tank booster constant pressure pump outlet pipe; the water supply tank is connected to the fuel tank in sequence through the fuel tank booster constant pressure pump inlet pipe, the fuel tank booster constant pressure pump and the fuel tank booster constant pressure pump outlet pipe; The oxygen tank boost constant pressure pump is connected to the oxygen tank boost control device, and the fuel tank boost constant pressure pump is connected to the fuel tank boost control device.

5. The rocket tank explosion test control system according to claim 4, characterized in that: A water supply oxygen box liquid delivery valve is arranged on the liquid inlet pipeline of the oxygen box booster constant pressure pump, and an oxygen box liquid inlet valve is arranged on the liquid outlet pipeline of the oxygen box booster constant pressure pump; A water supply fuel tank liquid delivery valve is provided on the liquid inlet pipeline of the fuel tank booster constant pressure pump, and a fuel tank liquid inlet valve is provided on the liquid outlet pipeline of the fuel tank booster constant pressure pump; The water supply oxygen tank liquid delivery valve and the oxygen tank liquid inlet valve are both connected to the oxygen tank boost control device, and the water supply fuel tank liquid delivery valve and the fuel tank liquid inlet valve are both connected to the fuel tank boost control device.

6. The rocket tank explosion test control system according to claim 1, characterized in that: The water supply tank is connected to a water supply tank level gauge, which is connected to a water injection and replenishment control device for remotely monitoring the liquid level in the water supply tank; The oxygen tank is connected to an oxygen tank level gauge, and the oxygen tank level gauge is connected to a water injection and replenishment control device for remotely monitoring the liquid level in the oxygen tank; The fuel tank is connected to a fuel tank liquid level gauge, and the fuel tank liquid level gauge is connected to a water injection and replenishment control device for remotely monitoring the liquid level in the fuel tank.

7. The rocket tank explosion test control system according to claim 1, characterized in that: The water supply tank is connected to a water supply tank exhaust pipe, and a water supply tank exhaust valve is arranged on the water supply tank exhaust pipe. The water supply tank exhaust valve is connected to the water injection and replenishment control device and is used to open and close the water supply tank exhaust pipe.

8. The rocket tank explosion test control system according to claim 1, characterized in that: The oxygen box is connected to an aerobic box overflow exhaust and liquid discharge pipeline, an aerobic box overflow exhaust and liquid discharge valve is arranged on the oxygen box overflow exhaust and liquid discharge pipeline, and the oxygen box overflow exhaust and liquid discharge valve is connected to a water injection and replenishment control device for opening and closing the oxygen box overflow exhaust and liquid discharge pipeline; The oxygen box overflow exhaust and liquid discharge pipeline is connected to an oxygen box pressure sensor, and the oxygen box pressure sensor is connected to an oxygen box pressurization control device for remotely monitoring the pressure value in the oxygen box.

9. The rocket tank explosion test control system according to claim 1, characterized in that: The fuel tank is connected to a fuel tank overflow exhaust and liquid drainage pipeline, and a fuel tank overflow exhaust and liquid drainage valve is provided on the fuel tank overflow exhaust and liquid drainage pipeline. The fuel tank overflow exhaust and liquid drainage valve is connected to a water injection and replenishment control device for opening and closing the fuel tank overflow exhaust and liquid drainage pipeline; The fuel tank overflow exhaust and liquid discharge pipeline is connected with a fuel tank pressure sensor, and the fuel tank pressure sensor is connected with a fuel tank boost control device for remotely monitoring the pressure value in the fuel tank.

10. The rocket tank explosion test control system according to claim 1, characterized in that: The oxygen box is connected to an oxygen box bottom drainage pipeline, and an oxygen box bottom drainage valve is arranged on the oxygen box bottom drainage pipeline. The oxygen box bottom drainage valve is connected to the oxygen box boost control device for opening and closing the oxygen box bottom drainage pipeline; The fuel tank is connected to a fuel tank bottom drain pipe, a fuel tank bottom drain valve is arranged on the fuel tank bottom drain pipe, and the fuel tank bottom drain valve is connected to a fuel tank boost control device for opening and closing the fuel tank bottom drain pipe.

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