Rocket tank pressurizing internal pressure blasting process system and blasting test method

Abstract

The invention provides a rocket storage tank pressurization internal pressure blasting process system and a blasting test method. The process system comprises a water injection and supplement control device, an oxygen tank pressurization control device, a combustion tank pressurization control device, an oxygen tank water supply pressure container, a combustion tank water supply pressure container and a nitrogen pressurization gas distribution plate. The rocket stainless steel storage tank is of a common-bottom structure, the upper portion of the storage tank is an oxygen tank, and the lower portion is a combustion tank. The oxygen box and the combustion box are correspondingly connected with the oxygen box water supply pressure container and the combustion box water supply pressure container respectively; the water injection and supplement control device is used for controlling the oxygen tank water supply pressure container, the combustion tank water supply pressure container and water injection cans of the oxygen tank and the combustion tank; the oxygen box pressurization control device and the combustion box pressurization control device are respectively used for controlling the nitrogen pressurization gas distribution plate to correspondingly provide pressurization nitrogen for the oxygen box water supply pressure container and the combustion box water supply pressure container; therefore, the pressurized internal pressure bursting test of the stainless steel storage tank of the rocket is completed. According to the invention, the test working efficiency and the control accuracy can be improved.

Description

Technical Field

[0001] The invention belongs to the field of aerospace technology, and in particular relates to a rocket tank pressurization internal pressure explosion process system and an explosion test method. Background Art

[0002] In the current aerospace field, rocket tanks are mostly made of traditional aluminum alloy materials. This type of material and its processing cost are high, which leads to an increase in the overall manufacturing cost of rocket tanks. In order to solve this problem, a feasible solution is to replace the material of liquid oxygen and methane rocket tanks with stainless steel, which can greatly reduce the manufacturing cost of rocket tanks.

[0003] The rocket tank is made of stainless steel, and its design, material selection and manufacturing process are fundamentally different from traditional aluminum alloy tanks. In order to ensure that the modified stainless steel tank can withstand the expected internal pressure load, especially to verify the stability and overall strength of its welded structure, it is necessary to conduct an internal pressure test on the rocket tank. The internal pressure test on the rocket tank is aimed at evaluating the structural strength of the stainless steel tank under full pressure at room temperature, and determining the maximum safe pressure limit of the oxygen tank in the stainless steel tank under the same conditions. Summary of the invention

[0004] In order to overcome the problems existing in the related art at least to a certain extent, the present invention provides a rocket tank pressurized internal pressure blasting process system and a blasting test method.

[0005] According to a first aspect of an embodiment of the present invention, the present invention provides a rocket tank pressurization internal pressure explosion process system, which is used to pressurize a rocket stainless steel tank to perform an internal pressure explosion test, and includes a water injection and replenishment control device, an oxygen tank pressurization control device, a fuel tank pressurization control device, an oxygen tank water supply pressure vessel, a fuel tank water supply pressure vessel and a nitrogen pressurization gas distribution plate;

[0006] 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 is connected to the oxygen tank water supply pressure vessel, the oxygen tank water supply pressure vessel is used to provide a water source for liquid pressurization for the oxygen tank; the fuel tank is connected to the fuel tank water supply pressure vessel, the fuel tank water supply pressure vessel is used to provide a water source for liquid pressurization for the fuel tank;

[0007] The water injection and replenishment control device is used to control the water supply centrifugal pump to fill the oxygen box water supply pressure vessel, the fuel box water supply pressure vessel, and the oxygen box and the fuel box with water; the oxygen box pressurization control device is used to control the nitrogen pressurization distribution plate to provide pressurized nitrogen for the oxygen box water supply pressure vessel, and the fuel tank pressurization control device is used to control the nitrogen pressurization distribution plate to provide pressurized nitrogen for the fuel tank water supply pressure vessel; so as to complete the pressurized internal pressure explosion test of the rocket stainless steel tank.

[0008] According to the rocket tank pressurization internal pressure blasting process system provided by the present invention, the oxygen tank water supply pressure vessel is connected to the fire protection pipeline through the first liquid inlet pipeline, and the fuel tank water supply pressure vessel is connected to the first liquid inlet pipeline through the second liquid inlet pipeline;

[0009] The oxygen box is connected to the fire fighting pipe via an oxygen box liquid inlet pipe, an oxygen box water injection pipe and the first liquid inlet pipe, and the fuel box is connected to the fire fighting pipe via a fuel box liquid inlet pipe, a fuel box water injection pipe and the second liquid inlet pipe;

[0010] The fire fighting pipeline is connected to a fire fighting water pool, wherein the fire fighting water pool is used to provide water source for the oxygen tank water supply pressure vessel, the fuel tank water supply pressure vessel, and the oxygen tank and the fuel tank.

[0011] Furthermore, the water supply centrifugal pump is arranged on the fire-fighting pipeline, and a water supply centrifugal pump inlet valve is also arranged on the fire-fighting pipeline, and the water supply centrifugal pump inlet valve is connected to the water injection and replenishment control device, and is used to open and close the fire-fighting pipeline;

[0012] The first liquid inlet pipeline is provided with a first water replenishment valve, which is connected to the water injection and replenishment control device and is used to open and close the first liquid inlet pipeline; the second liquid inlet pipeline is provided with a second water injection valve, which is connected to the water injection and replenishment control device and is used to open and close the second liquid inlet pipeline;

[0013] An oxygen box water injection valve is provided on the oxygen box water injection pipeline, and the oxygen box water injection valve is connected to the water injection and replenishment control device for opening and closing the oxygen box water injection pipeline; a fuel box water injection valve is provided on the fuel box water injection pipeline, and the fuel box water injection valve is connected to the water injection and replenishment control device for opening and closing the fuel box water injection pipeline.

[0014] Furthermore, the oxygen box water supply pressure vessel is connected to the oxygen box through an oxygen box liquid inlet pipeline, an oxygen box liquid inlet valve is provided on the oxygen box liquid inlet pipeline, and the oxygen box liquid inlet valve is connected to the oxygen box boost control device for opening and closing the oxygen box liquid inlet pipeline;

[0015] The fuel tank water supply pressure vessel is connected to the fuel tank through a fuel tank liquid inlet pipe, and a fuel tank liquid inlet valve is provided on the fuel tank liquid inlet pipe. The fuel tank liquid inlet valve is connected to the fuel tank boost control device and is used to open and close the fuel tank liquid inlet pipe.

[0016] Furthermore, an oxygen tank liquid inlet valve is provided on the oxygen tank liquid inlet pipeline, and the oxygen tank liquid inlet valve is connected to the oxygen tank boost control device for opening and closing the oxygen tank liquid inlet pipeline; a fuel tank liquid inlet valve is provided on the fuel tank liquid inlet pipeline, and the fuel tank liquid inlet valve is connected to the fuel tank boost control device for opening and closing the fuel tank liquid inlet pipeline.

[0017] According to the rocket tank pressurization internal pressure blasting process system provided by the present invention, the nitrogen boosting distribution plate is connected to the oxygen tank water supply pressure vessel through a first boosting pipe, and the first boosting pipe is provided with an air supply valve and a first boosting valve; the nitrogen boosting distribution plate is connected to the fuel tank water supply pressure vessel through the first boosting pipe and the second boosting pipe, and the second boosting pipe is provided with a second boosting valve.

[0018] Furthermore, a first boosting orifice plate is provided on the first boosting pipeline between the first boosting valve and the air inlet of the oxygen tank water supply pressure vessel; and a second boosting orifice plate is provided on the second boosting pipeline between the second boosting valve and the air inlet of the fuel tank water supply pressure vessel.

[0019] According to the rocket tank pressurization internal pressure blasting process system provided by the present invention, the oxygen tank water supply pressure vessel is connected to a first liquid level gauge, and the first liquid level gauge is connected to a water injection and replenishment control device for remotely monitoring the water level in the oxygen tank water supply pressure vessel;

[0020] The fuel tank water supply pressure vessel is connected to a second liquid level gauge, which is connected to a water injection and replenishment control device and is used for remotely monitoring the water level in the fuel tank water supply pressure vessel.

[0021] According to the rocket tank pressurization internal pressure blasting process system provided by the present invention, the oxygen tank water supply pressure vessel is connected to a first exhaust pipe, a first exhaust valve is provided on the first exhaust pipe, and the first exhaust valve is connected to the oxygen tank pressurization control device for opening and closing the first exhaust pipe;

[0022] The fuel tank water supply pressure vessel is connected to a second exhaust pipe, a second exhaust pipe is provided with a second exhaust valve, and the second exhaust valve is connected to the fuel tank boost control device for opening and closing the second exhaust pipe.

[0023] According to a second aspect of an embodiment of the present invention, based on any one of the above-mentioned rocket tank pressurization internal pressure explosion process systems, the present invention also provides a rocket tank pressurization internal pressure explosion test method, which comprises the following steps:

[0024] Water supply and replenishment stage before the test:

[0025] The water injection and replenishment control device controls the opening of the fire-fighting pipeline and the first liquid inlet pipeline, the second liquid inlet pipeline, the oxygen tank water injection pipeline and the fuel tank water injection pipeline, so as to inject water and replenish water for the oxygen tank water supply pressure vessel, the fuel tank water supply pressure vessel, the oxygen tank and the fuel tank;

[0026] The first stage of the rocket stainless steel tank internal pressure explosion test:

[0027] The fuel tank is pressurized to the first pressure value P before the equatorial plane of the rear bottom of the tank becomes unstable s1 , oxygen box pressurized to P s1 +ΔP s , determine the changes in the material, process and structural performance of the first stage test tank at the first pressure value before the rear bottom equatorial plane becomes unstable; where ΔP s Indicates the amount of boost units to increase the level;

[0028] The second stage of the rocket stainless steel tank internal pressure explosion test:

[0029] The fuel tank is pressurized to the second pressure value P after the equatorial plane of the rear bottom of the tank becomes unstable and before it is destroyed. s2 , oxygen box pressurized to P s2 +ΔP s , determine the changes in the material, process and structural performance of the second-stage test tank at the second pressure value after the rear bottom equatorial plane becomes unstable and before it is destroyed;

[0030] The third stage of the rocket stainless steel tank internal pressure explosion test:

[0031] The process of blasting test on rocket stainless steel tank is as follows:

[0032] The oxygen box is pressurized step by step until it explodes and then the pressurization is stopped, or the oxygen box is pressurized to the preset maximum pressure value P of the oxygen box. o When the oxygen tank does not explode, stop pressurizing; gradually pressurize the fuel tank to the preset maximum fuel tank pressure value P r When the pressure is increased, the boost is stopped; the maximum pressure value of the fuel tank is P r To prevent the pressure from the back pressure shock when the oxygen box explodes; to determine the changes in the material, process structure and performance of the tank after the third stage test oxygen box explodes or at the maximum pressure value;

[0033] The oxygen box boost control device or the fuel box boost control device controls the closing of the first boost pipe, and discharges the gas in the first boost pipe and the second boost pipe and the oxygen box water supply pressure vessel and the fuel tank water supply pressure vessel, and discharges the water in the fire-fighting pipe, the first liquid inlet pipe, the second liquid inlet pipe, the oxygen box liquid inlet pipe, the fuel tank liquid inlet pipe, the oxygen box overflow exhaust and liquid drainage pipe, and the fuel tank overflow exhaust and liquid drainage pipe.

[0034] According to the above specific embodiments of the present invention, it can be known that at least the following beneficial effects are achieved: the rocket tank pressurization internal pressure blasting process system provided by the present invention utilizes the fire water pool of the liquid oxygen / methane liquid rocket engine test bench, and uses a water injection and replenishment control device to respectively fill the oxygen box, the fuel box, and the oxygen box water supply pressure vessel and the fuel box water supply pressure vessel of the rocket stainless steel tank with water through a water supply centrifugal pump. After the oxygen box and the fuel box are filled with water, the water supply centrifugal pump is stopped; then the oxygen box pressurization control device and the fuel box pressurization control device respectively use the nitrogen pressurization gas distribution plate to correspondingly fill the oxygen box and the fuel box with water. After the water supply pressure vessel of the tank and the water supply pressure vessel of the fuel tank are pressurized with nitrogen, the oxygen tank pressurization control device and the fuel tank pressurization control device respectively control the oxygen tank water supply pressure vessel and the fuel tank water supply pressure vessel to squeeze and deliver water to the oxygen tank and the fuel tank, so as to perform water injection and step-by-step pressurization; the first stage fuel tank pressurization, the second stage fuel tank pressurization and the third stage blasting test are completed in sequence according to the test requirements; in the process of step-by-step pressurization of the oxygen tank and the fuel tank, the water injection and replenishment control device can automatically start water injection and replenishment according to the low liquid level value of the oxygen tank water supply pressure vessel and the fuel tank water supply pressure vessel. The present invention can realize online automatic control of the test, and compared with manual operation, it can improve the work efficiency of the test and the accuracy of the test control, and reduce the risk of damage during the tank blasting test.

[0035] The investment cost of each device in the rocket tank pressurization internal pressure blasting process system provided by the present invention is relatively low, the process system and the control program are simple and optimized, and the pressurization pressure control accuracy is high. In a short test period, compared with deionized water, the use of fire water as the pressurization medium has a lower investment cost.

[0036] It should be understood that the above general description and the following detailed description are merely exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings below are part of the specification of the present invention, which illustrate embodiments of the present invention. The accompanying drawings together with the description of the specification are used to explain the principle of the present invention.

[0038] Figure 1 A schematic structural diagram of a rocket tank pressurization and internal pressure blasting process system provided in one embodiment of the present invention.

[0039] Description of reference numerals:

[0040] K0: water injection and replenishment control device; K1: oxygen tank pressurization control device; K2: fuel tank pressurization control device;

[0041] H1: oxygen tank water supply pressure vessel; H2: fuel tank water supply pressure vessel; P: nitrogen booster distribution panel;

[0042] O: oxygen tank; R: fuel tank; X: fire water pool;

[0043] E0: water supply centrifugal pump; G: pre-pump filter;

[0044] F1, first row of clean valves; F2, second row of clean valves; F3, third row of clean valves;

[0045] A0: water supply centrifugal pump inlet valve; A1: first water supply valve; A2: second water injection valve; A3: oxygen tank inlet valve; A4: fuel tank inlet valve; A5: first exhaust valve; A6: second exhaust valve; A7: first safety valve; A8: second safety valve; A9: first drain valve; A10: second drain valve;

[0046] B0: air supply valve; B1: first boost valve; B2: second boost valve; B3: oxygen tank overflow exhaust and drain valve; B4: fuel tank overflow exhaust and drain valve;

[0047] C1: first pressurizing orifice plate; C2: second pressurizing orifice plate;

[0048] D1: oxygen tank water injection valve; D2: fuel tank water injection valve;

[0049] L1: first liquid level gauge; L2: second liquid level gauge; L3: third liquid level gauge; L4: fourth liquid level gauge;

[0050] P1: first pressure sensor; P2: second pressure sensor; P3: third pressure sensor; P4: fourth pressure sensor;

[0051] a0: fire protection pipeline; a1: first liquid inlet pipeline; a2: second liquid inlet pipeline; a3: oxygen tank liquid inlet pipeline; a4: fuel tank liquid inlet pipeline; a5: first exhaust pipeline; a6: second exhaust pipeline; a7: first safety exhaust pipeline; a8: second safety exhaust pipeline; a9: first liquid discharge pipeline; a10: second liquid discharge pipeline;

[0052] b1: first booster pipe; b2: second booster pipe; b3: oxygen box overflow exhaust and liquid drainage pipe; b4: fuel box overflow exhaust and liquid drainage pipe;

[0053] d1: oxygen tank water injection pipeline; d2: fuel tank water injection pipeline. DETAILED DESCRIPTION

[0054] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clearly understood, the spirit of the contents disclosed by the present invention will be clearly explained with the accompanying drawings and detailed descriptions below. After understanding the embodiments of the contents of the present invention, any technician in the relevant technical field can change and modify the techniques taught by the contents of the present invention without departing from the spirit and scope of the contents of the present invention.

[0055] The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. In addition, the same or similar reference numerals used in the drawings and embodiments are used to represent the same or similar parts.

[0056] The terms “first”, “second”, etc. used in this document do not particularly refer to an order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described with the same technical terms.

[0057] The directional terms used in this document, such as up, down, left, right, front or back, etc., are only used to refer to the directions of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the invention.

[0058] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0059] As used herein, "and / or" includes any or all combinations of the items described.

[0060] As used herein, “plurality” includes “two” and “more than two”; as used herein, “plurality groups” includes “two groups” and “more than two groups”.

[0061] The terms "substantially" and "approximately" used herein are used to modify any quantity or error that may vary slightly, but these slight changes or errors do not change their essence. Generally speaking, the range of slight changes or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. Those skilled in the art should understand that the aforementioned values ​​can be adjusted according to actual needs and are not limited thereto.

[0062] Certain terms that are used to describe the invention are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of the invention.

[0063] In the prior art, gas can be used to perform internal pressure tests on rocket stainless steel tanks. The usual test process during the test is:

[0064] First, fill the rocket's stainless steel tank with water, and then use nitrogen or air to pressurize the tank.

[0065] It is worth noting that the unique ductility range of stainless steel (approximately 10% to 25%) means that the stainless steel tank will expand to a certain extent during the gas filling and pressure increase process. When the pressure continues to increase to reach the bursting limit of the tank material, a violent explosion may occur, accompanied by a strong shock wave, which will undoubtedly pose a certain safety risk to the infrastructure and personnel safety of the test site.

[0066] In the prior art, liquid can also be used to perform internal pressure test on rocket stainless steel tanks. The usual test process during the test is:

[0067] First, fill the rocket's stainless steel tank with water, and then use a water supply tank and a constant pressure variable frequency centrifugal pump and other equipment to pressurize the liquid in the rocket's stainless steel tank.

[0068] However, the investment cost of water supply tanks and constant pressure variable frequency centrifugal pumps is relatively high, and the control procedures for boosting rate, boosting amplitude and voltage stabilization during the boosting process of the pump are relatively cumbersome and complex, and the control accuracy is prone to deviations.

[0069] In order to solve the problems existing when using gas or liquid to pressurize a rocket's stainless steel tank for internal pressure explosion test, the present invention adopts a process system and test method for pressurizing a rocket's stainless steel tank for internal pressure explosion by combining gas and liquid media. The investment cost of the equipment is low, the process system and control program are simple and optimized, the pressurization pressure control accuracy is high, and the risk of explosion shock caused by tank pressurization explosion can be better avoided.

[0070] like Figure 1 As shown, the rocket tank pressurization and internal pressure blasting process system provided by the present invention is used to pressurize the rocket stainless steel tank and perform internal pressure blasting test, which includes a water injection and replenishment control device K0, an oxygen box pressurization control device K1, a fuel tank pressurization control device K2, an oxygen box water supply pressure vessel H1, a fuel tank water supply pressure vessel H2 and a nitrogen pressurization distribution plate P.

[0071] The rocket stainless steel tank adopts a common bottom structure tank. The upper part of the tank is the oxygen tank O, which is used to fill liquid oxygen propellant; the lower part of the tank is the fuel tank R, which is used to fill liquid methane propellant. It should be noted that during the internal pressure explosion test, both the oxygen tank O and the fuel tank R are used to fill water. The oxygen tank O is connected to the oxygen tank water supply pressure vessel H1, and the fuel tank R is connected to the fuel tank water supply pressure vessel H2.

[0072] The water injection and replenishment control device K0 is used to control the water supply centrifugal pump E0 to fill water into the oxygen tank water supply pressure vessel H1, the fuel tank water supply pressure vessel H2, and the oxygen tank O and fuel tank R in the rocket stainless steel tank. The oxygen tank water supply pressure vessel H1 is used to provide a water source for liquid pressurization for the oxygen tank O, and the fuel tank water supply pressure vessel H2 is used to provide a water source for liquid pressurization for the fuel tank R.

[0073] The oxygen tank pressurization control device K1 is used to control the nitrogen pressurization distribution plate P to provide pressurized nitrogen for the oxygen tank water supply pressure vessel H1, and the fuel tank pressurization control device K2 is used to control the nitrogen pressurization distribution plate P to provide pressurized nitrogen for the fuel tank water supply pressure vessel H2.

[0074] The present invention utilizes the fire water pool X of the liquid oxygen / methane liquid rocket engine test bench, and uses the water injection and replenishment control device K0 to respectively inject water into the oxygen tank O, the fuel tank R, and the oxygen tank water supply pressure vessel H1 and the fuel tank water supply pressure vessel H2 of the rocket stainless steel tank through the water supply centrifugal pump E0. After the oxygen tank O and the fuel tank R are filled with water, the water supply centrifugal pump E0 is stopped. Then the oxygen tank pressurization control device K1 and the fuel tank pressurization control device K2 respectively use the nitrogen pressurization gas distribution plate P to correspondingly pressurize the oxygen tank water supply pressure vessel H1 and the fuel tank water supply pressure vessel H2 with nitrogen, and then the oxygen tank pressurization control device K1 and the fuel tank pressurization control device K2 respectively squeeze and deliver water to the oxygen tank O and the fuel tank R to perform water injection and step-by-step pressurization. According to the test requirements, the first stage fuel tank R pressurization, the second stage fuel tank R pressurization and the third stage blasting test are sequentially completed. During the process of injecting water and gradually pressurizing the oxygen tank O and the fuel tank R, the water injection and replenishment control device K0 can automatically start water injection and replenishment according to the low liquid level values ​​of the oxygen tank water supply pressure vessel H1 and the fuel tank water supply pressure vessel H2.

[0075] The rocket tank pressurization internal pressure blasting process system provided by the present invention can realize online automatic control of the test. Compared with manual operation, it can improve the working efficiency of the test and the accuracy of the test control, and reduce the risk of damage during the tank blasting test. The investment cost of each device in the rocket tank pressurization internal pressure blasting process system provided by the present invention is relatively low, the process system and the control program are simple and optimized, and the pressurization pressure control accuracy is high. The assessment parameters of the rocket stainless steel tank internal pressure blasting test are obtained through the present invention.

[0076] In a specific embodiment, the oxygen tank water supply pressure vessel H1 is connected to the firefighting pipe a0 through the first liquid inlet pipe a1, and the firefighting pipe a0 is connected to a firefighting water tank X. The fuel tank water supply pressure vessel H2 is connected to the first liquid inlet pipe a1 through the second liquid inlet pipe a2.

[0077] The oxygen tank O in the rocket stainless steel tank is connected to the fire protection pipe a0 through the oxygen tank liquid inlet pipe a3, the oxygen tank water injection pipe d1 and the first liquid inlet pipe a1, and the fuel tank R in the rocket stainless steel tank is connected to the fire protection pipe a0 through the fuel tank liquid inlet pipe a4, the fuel tank water injection pipe d2 and the second liquid inlet pipe a2.

[0078] Fire water pool X uses a liquid oxygen / methane liquid rocket engine test bench fire water pool, which is used to provide water for the oxygen tank water supply pressure vessel H1, the fuel tank water supply pressure vessel H2 and the rocket stainless steel tank. Using fire water instead of deionized water for testing in a short period of time can reduce the test cost.

[0079] In the above embodiment, the water supply centrifugal pump E0 is arranged on the fire-fighting pipe a0. The water supply centrifugal pump E0 adopts a horizontal variable frequency centrifugal pump, which is used to pump water from the fire-fighting water tank X to the oxygen tank water supply pressure vessel H1, the fuel tank water supply pressure vessel H2 and the oxygen tank O and the fuel tank R of the rocket stainless steel storage tank after removing the waterproofing.

[0080] In this embodiment, a water supply centrifugal pump inlet valve A0 is also provided 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. The water supply centrifugal pump E0 is connected to the water injection and replenishment control device K0, and is used to pump out water from the fire-fighting water tank X through the fire-fighting pipe a0 to remove the waterproof.

[0081] The water supply centrifugal pump inlet valve A0 can adopt a switch-controlled pneumatic stop valve.

[0082] In the above embodiment, the first liquid inlet pipeline a1 is provided with a first water replenishment valve A1, which is connected to the water injection and replenishment control device K0 and is used to open and close the first liquid inlet pipeline a1. The second liquid inlet pipeline a2 is provided with a second water injection valve A2, which is connected to the water injection and replenishment control device K0 and is used to open and close the second liquid inlet pipeline a2.

[0083] The first water supply valve A1 and the second water injection valve A2 both adopt switch-controlled pneumatic stop valves.

[0084] In the above embodiment, an oxygen tank water injection pipe d1 is provided with an oxygen tank water injection valve D1, which is connected to the water injection and replenishment control device K0 and is used to open and close the oxygen tank water injection pipe d1. A fuel tank water injection pipe d2 is provided with a fuel tank water injection valve D2, which is connected to the water injection and replenishment control device K0 and is used to open and close the fuel tank water injection pipe d2.

[0085] In the above embodiment, the oxygen box water supply pressure vessel H1 is connected to the oxygen box O through the oxygen box liquid inlet pipe a3, and the oxygen box liquid inlet pipe a3 is provided with an oxygen box liquid inlet valve A3, and the oxygen box liquid inlet valve A3 is connected to the oxygen box boost control device K1 for opening and closing the oxygen box liquid inlet pipe a3.

[0086] The fuel tank water supply pressure vessel H2 is connected to the fuel tank R through the fuel tank liquid inlet pipe a4, on which a fuel tank liquid inlet valve A4 is provided. The fuel tank liquid inlet valve A4 is connected to the fuel tank boost control device K2 for opening and closing the fuel tank liquid inlet pipe a4.

[0087] The oxygen tank inlet valve A3 and the fuel tank inlet valve A4 can both adopt switch-controlled pneumatic stop valves.

[0088] In the above embodiment, a pre-pump filter G is also provided on the fire-fighting pipeline 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 first liquid inlet pipeline a1 at 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 first liquid inlet pipeline a1.

[0089] In the above embodiment, the nitrogen booster distribution plate P is connected to the oxygen box water supply pressure vessel H1 through the first booster pipe b1, and the first booster pipe b1 is provided with an air supply valve B0 and a first booster valve B1, wherein the air supply valve B0 can be arranged close to the air outlet of the nitrogen booster distribution plate P, and the first booster valve B1 can be arranged close to the air inlet of the oxygen box water supply pressure vessel H1.

[0090] A first boosting orifice C1 is also provided on the first boosting pipe b1, between the first boosting valve B1 and the air inlet of the oxygen box water supply pressure vessel H1. The first boosting orifice C1 adopts a bowl-shaped structure and is used to limit the flow rate when the oxygen box water supply pressure vessel H1 is boosted with nitrogen.

[0091] The nitrogen boost distribution plate P is connected to the fuel tank water supply pressure vessel H2 through the first boost pipe b1 and the second boost pipe b2. The second boost pipe b2 is provided with a second boost valve B2. The second boost valve B2 can be provided close to the air inlet of the fuel tank water supply pressure vessel H2.

[0092] A second boosting orifice plate C2 is also provided on the second boosting pipe b2, between the second boosting valve B2 and the air inlet of the fuel tank water supply pressure vessel H2. The second boosting orifice plate C2 has a bowl-shaped structure and is used to limit the flow rate when the fuel tank water supply pressure vessel H2 is boosted with nitrogen.

[0093] In the above embodiment, the oxygen tank water supply pressure vessel H1 is connected to the second drain valve F2, and the fuel tank water supply pressure vessel H2 is connected to the third drain valve F3, and both the second drain valve F2 and the third drain valve F3 are manual stop valves. The second drain valve F2 is used to manually drain the oxygen tank water supply pressure vessel H1, and the third drain valve F3 is used to manually drain the fuel tank water supply pressure vessel H2.

[0094] In the above embodiment, the oxygen tank water supply pressure vessel H1 is connected to a first liquid level gauge L1, which is connected to the water injection and replenishment control device K0 for remotely monitoring the water level in the oxygen tank water supply pressure vessel H1.

[0095] The fuel tank water supply pressure vessel H2 is connected to a second liquid level gauge L2, which is connected to the water injection and replenishment control device K0 and is used for remotely monitoring the water level in the fuel tank water supply pressure vessel H2.

[0096] In the above embodiment, the oxygen box water supply pressure container H1 is connected to the first pressure sensor P1, and the first pressure sensor P1 is connected to the oxygen box pressurization control device K1 for remotely monitoring the pressure of the oxygen box water supply pressure container H1 during pressurization.

[0097] The fuel tank water supply pressure vessel H2 is connected to a second pressure sensor P2, and the second pressure sensor P2 is connected to the fuel tank pressurization control device K2, and is used for remotely monitoring the pressure of the fuel tank water supply pressure vessel H2 during pressurization.

[0098] In the above embodiment, the oxygen box water supply pressure vessel H1 is connected to the first exhaust pipe a5, and the gas in the oxygen box water supply pressure vessel H1 is discharged to the atmosphere through the first exhaust pipe a5. The first exhaust pipe a5 is provided with a first exhaust valve A5, which is connected to the oxygen box pressurization control device K1 and is used to open and close the first exhaust pipe a5.

[0099] The fuel tank water supply pressure vessel H2 is connected to a second exhaust pipe a6, and the gas in the fuel tank water supply pressure vessel H2 is discharged to the atmosphere through the second exhaust pipe a6. A second exhaust valve A6 is provided on the second exhaust pipe a6, and the second exhaust valve A6 is connected to the fuel tank boost control device K2, and is used to open and close the second exhaust pipe a6.

[0100] The first exhaust valve A5 and the second exhaust valve A6 are both switch-controlled pneumatic stop valves.

[0101] The oxygen box water supply pressure vessel H1 is also connected to a first safety exhaust pipe a7, on which a first safety valve A7 is provided, and the first safety valve A7 is used to open and close the first safety exhaust pipe a7. When the oxygen box water supply pressure vessel H1 is over-pressured, safe exhaust can be discharged through the first safety exhaust pipe a7.

[0102] The fuel tank water supply pressure vessel H2 is also connected to a second safety exhaust pipe a8, on which a second safety valve A8 is provided, and the second safety valve A8 is used to open and close the second safety exhaust pipe a8. When the fuel tank water supply pressure vessel H2 is over-pressured, safe exhaust can be discharged through the second safety exhaust pipe a8.

[0103] In the above embodiment, a first liquid discharge pipe a9 is provided at the bottom of the oxygen tank O, and a first liquid discharge valve A9 is provided on the first liquid discharge pipe a9, and the first liquid discharge valve A9 is used to open and close the first liquid discharge pipe a9. The first liquid discharge valve A9 is connected to the oxygen tank pressurization control device K1. When it is necessary to relieve the pressure of the oxygen tank O, the oxygen tank pressurization control device K1 controls the first liquid discharge valve A9 to open to relieve the pressure of the oxygen tank O.

[0104] A second drain pipe a10 is provided at the bottom of the fuel tank R, and a second drain valve A10 is provided on the second drain pipe a10. The second drain valve A10 is used to open and close the second drain pipe a10. The second drain valve A10 is connected to the fuel tank pressure control device K2. When it is necessary to relieve the pressure of the fuel tank R, the fuel tank pressure control device K2 controls the second drain valve A10 to open to relieve the pressure of the fuel tank R.

[0105] In the above embodiment, the oxygen tank O is connected to a third liquid level meter L3, and the third liquid level meter L3 is connected to the water injection and replenishment control device K0, and is used to remotely monitor the water level in the oxygen tank O.

[0106] The fuel tank R is connected to a fourth liquid level gauge L4, which is connected to the water injection and replenishment control device K0 and is used for remotely monitoring the water level in the fuel tank R.

[0107] In the above embodiment, the oxygen box O is connected to a third pressure sensor P3, and the third pressure sensor P3 is connected to the oxygen box pressurization control device K1, and is used to remotely monitor the pressure value of the oxygen box O.

[0108] The fuel tank R is connected to a fourth pressure sensor P4 , which is connected to the fuel tank pressurization control device K2 and is used for remotely monitoring the pressure value of the fuel tank R .

[0109] In the above embodiment, the top of the oxygen box O is connected to the oxygen box overflow exhaust and drainage pipe b3, and the oxygen box overflow exhaust and drainage pipe b3 is provided with an oxygen box overflow exhaust and drainage valve 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.

[0110] The top of the fuel tank R is connected to a fuel tank overflow exhaust and drainage pipe b4, on which a fuel tank overflow exhaust and drainage valve B4 is provided. The fuel tank overflow exhaust and drainage valve B4 is connected to the water injection and replenishment control device K0, and is used to open and close the fuel tank overflow exhaust and drainage pipe b4.

[0111] The oxygen tank overflow exhaust and drain valve B3 and the fuel tank overflow exhaust and drain valve B4 both use switch-controlled pneumatic stop valves.

[0112] In the above embodiments, the water injection and replenishment control device K0 is connected to the water supply centrifugal pump inlet valve A0, the first water replenishment valve A1, the second water injection valve A2, the first exhaust valve A5, the second exhaust valve A6, the oxygen tank water injection valve D1, the fuel tank water injection valve D2, the oxygen tank overflow exhaust and drain valve B3, the fuel tank overflow exhaust and drain valve B4, the water supply centrifugal pump E0, the first liquid level gauge L1, the second liquid level gauge L2, the third liquid level gauge L3, and the fourth liquid level gauge L4 send 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 first water replenishment valve A1, the second water injection valve A2, the oxygen tank water injection valve D1 and the fuel tank water injection valve D2 to open or close according to the received liquid level information, and controls the water supply centrifugal pump E0 to operate or stop the operation, so as to control the water injection and replenishment or stop the water injection and replenishment operation of the oxygen tank water supply pressure vessel H1, the fuel tank water supply pressure vessel H2, the oxygen tank O and the fuel tank R. The water injection and replenishment control device K0 is also used to remotely control the first exhaust valve A5, the second exhaust valve A6, the oxygen tank overflow exhaust and liquid discharge valve B3 and the fuel tank overflow exhaust and liquid discharge valve B4, so as to exhaust or drain the oxygen tank water supply pressure vessel H1, the fuel tank water supply pressure vessel H2, the oxygen tank O and the fuel tank R.

[0113] The oxygen tank pressurization control device K1 is a control device for remotely injecting water and pressurizing the oxygen tank O of the rocket's stainless steel tank. The oxygen tank pressurization control device K1 is remotely interlocked with the air supply valve B0, the first boosting valve B1, the oxygen tank overflow exhaust and liquid discharge valve B3, the oxygen tank liquid inlet valve A3, the first exhaust valve A5, the first liquid discharge valve A9, the first pressure sensor P1, and the third pressure sensor P3 for remote control.

[0114] The fuel tank pressurization control device K2 is a control device for remotely injecting water and pressurizing the fuel tank of the rocket's stainless steel tank. The fuel tank pressurization control device K2 is remotely interlocked with the air supply valve B0, the second boosting valve B2, the fuel tank overflow exhaust and liquid drain valve B4, the fuel tank liquid inlet valve A4, the second exhaust valve A6, the second liquid drain valve A10, the second pressure sensor P2 and the fourth pressure sensor P4.

[0115] Based on the rocket tank pressurization internal pressure explosion process system provided by the present invention, the present invention also provides a rocket tank pressurization internal pressure explosion test method, which comprises the following steps:

[0116] S1. Water supply and replenishment stage before the test:

[0117] The water injection and replenishment control device K0 controls the opening of the first exhaust valve A5, the second exhaust valve A6, the oxygen box overflow exhaust and drain valve B3 and the fuel box overflow exhaust and drain valve B4, so that the gases in the oxygen box water supply pressure vessel H1, the fuel box water supply pressure vessel H2, the oxygen box O and the fuel box R are discharged into the atmosphere from the first exhaust pipe a5, the second exhaust pipe a6, the oxygen box overflow exhaust and drain pipe b3 and the fuel box overflow exhaust and drain pipe b4 respectively, so as to facilitate the water injection and replenishment for the oxygen box water supply pressure vessel H1, the fuel box water supply pressure vessel H2, the oxygen box O and the fuel tank R.

[0118] The water injection and replenishment control device K0 controls to open the water supply centrifugal pump inlet valve A0, the water supply centrifugal pump E0, the first replenishment valve A1, the second water injection valve A2, the oxygen tank water injection valve D1 and the fuel tank water injection valve D2 in sequence, so that the fire water in the fire water pool X flows into the oxygen tank water supply pressure vessel H1 through the fire pipe a0 and the first liquid inlet pipe a1, flows into the fuel tank water supply pressure vessel H2 through the fire pipe a0, the first liquid inlet pipe a1 and the second liquid inlet pipe a2, flows into the oxygen tank O through the fire pipe a0, the first liquid inlet pipe a1 and the oxygen tank water injection pipe d1, and flows into the fuel tank R through the fire pipe a0, the first liquid inlet pipe a1 and the fuel tank water injection pipe d2, so as to perform water injection operations on the oxygen tank water supply pressure vessel H1, the fuel tank water supply pressure vessel H2, the oxygen tank O and the fuel tank R.

[0119] The first liquid 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 oxygen tank water supply pressure vessel H1 reaches the preset high liquid level value, the water injection and replenishment control device K0 controls the closing of the first water replenishment valve A1 to stop injecting water into the oxygen tank water supply pressure vessel H1.

[0120] The second 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 fuel tank water supply pressure vessel H2 reaches the preset high liquid level value, the water injection and replenishment control device K0 controls the closing of the second water replenishment valve A2 to stop injecting water into the fuel tank water supply pressure vessel H2.

[0121] The third 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 oxygen tank O reaches the preset high liquid level value, the water injection and replenishment control device K0 controls the closing of the oxygen tank water injection valve D1 to stop injecting water into the oxygen tank O.

[0122] The fourth liquid level meter L4 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 high liquid level value, the water injection and replenishment control device K0 controls the closure of the fuel tank water injection valve D2 to stop injecting water into the fuel tank R.

[0123] S2. The first stage of the internal pressure explosion test of the rocket stainless steel tank:

[0124] The fuel tank R is pressurized to the first pressure value P before the equatorial plane of the rear bottom of the tank becomes unstable s1 , oxygen box pressurized to P s1 +ΔP s , determine 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. Among them, ΔP s Indicates the unit amount of pressure increase of the increased level, and its specific value is determined according to the requirements of the burst test. s It can be 0.1Mpa, 0.2Mpa or 0.3MPa, etc.

[0125] Specifically, according to the test operation step requirements, the oxygen tank pressurization control device K1 and the fuel tank pressurization control device K2 are respectively set with automatic control timing: when the pressurization unit volume ΔP s When the pressure is 0.1 MPa, the fuel tank R is loaded step by step to the first pressure value P s1 ; Oxygen box O is loaded step by step to P s1 +0.1MPa. Subsequently, the oxygen tank O and the fuel tank R are gradually depressurized 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.

[0126] The first stage of pressurization test:

[0127] The oxygen box pressurization control device K1 controls the closing of the oxygen box overflow exhaust and liquid discharge valve B3 and the first exhaust valve A5, and then controls the opening of the air supply valve B0 and the water supply oxygen box liquid supply valve B1 in sequence. The pressurized nitrogen provided by the nitrogen pressurization distribution board P is used to pressurize the oxygen box water supply pressure vessel H1 with nitrogen through the first pressurization valve B1 and the first pressurization pipeline b1, and when the pressure is increased to 0.1Mpa, the oxygen box pressurization control device K1 controls the opening of the oxygen box liquid inlet valve A3, and the water in the oxygen box water supply pressure vessel H1 is squeezed and transported to the oxygen box O through the oxygen box liquid inlet pipeline a3 for liquid pressurization.

[0128] When the pressure value detected by the third pressure sensor P3 reaches 0.1MPa, the fuel tank pressurization control device K2 is started again. The fuel tank pressurization control device K2 controls the closing of the fuel tank overflow exhaust and liquid discharge valve B4 and the second exhaust valve A6, and then controls the opening of the second pressurization valve B2. The pressurized nitrogen provided by the nitrogen pressurization distribution board P is used to nitrogen-pressurize the fuel tank water supply pressure vessel H2 through the second pressurization valve B2 and the second pressurization pipeline b2, and when the pressure is increased to 0.1Mpa, the fuel tank pressurization control device K2 controls the opening of the fuel tank liquid inlet valve A4, and the water in the fuel tank water supply pressure vessel H2 is squeezed and transported to the fuel tank R through the fuel tank liquid inlet pipeline a4 for liquid pressurization.

[0129] When the pressure value detected by the fourth pressure sensor P4 reaches 0.1MPa, the oxygen tank pressure increasing control device K1 is started again to increase the pressure of the liquid in the oxygen tank O to 0.2MPa, and then the fuel tank pressure increasing control device K2 is started again to increase the pressure of the liquid in the fuel tank R to 0.2MPa. The oxygen tank O and the fuel tank R are pressurized alternately with 0.1MPa as the first pressure increasing level. When the pressure value in the oxygen tank O detected by the third pressure sensor P3 reaches P s1 +0.1MPa, the pressure value in the fuel tank R detected by the fourth pressure sensor P4 is P s1 MPa, the oxygen tank pressurization control device K1 controls the closure of the first pressurization valve B1 and the oxygen tank liquid inlet valve A3 in sequence, and the fuel tank pressurization control device K2 controls the closure of the second pressurization valve B2 and the fuel tank liquid inlet valve A4 to stop pressurizing the oxygen tank O and the fuel tank R.

[0130] The rocket's stainless steel tank was then depressurized:

[0131] The fuel tank boost control device K2 controls the opening of the second drain valve A10 to reduce the pressure of the fuel tank R, and the water in the fuel tank R is discharged through the second drain pipe a10. When the pressure value in the fuel tank R detected by the fourth pressure sensor P4 drops by 0.1MPa, the second drain valve A10 is controlled to be closed. The oxygen tank boost control device K1 controls the opening of the first drain valve A9, so that the water in the oxygen tank O is discharged through the first drain pipe a9. When the pressure value in the oxygen tank O detected by the third pressure sensor P3 drops by 0.1MPa, the oxygen tank boost control device K1 controls the closing of the first drain valve A9. Then the pressure reduction of the fuel tank R is started again. When the oxygen tank O and the fuel tank R are alternately reduced to 0MPa in this way, the first stage of the boost test is completed, and the parameters obtained from the test are recorded. Step-by-step pressure reduction can prevent the common bottom structure tank from experiencing back pressure shock and avoid rupture.

[0132] During the pressurization process, when the liquid level value of the oxygen tank water supply pressure vessel H1 detected by the first liquid level gauge L1 reaches a preset low liquid level value, and the liquid level value of the fuel tank water supply pressure vessel H2 detected by the second liquid level gauge L2 reaches a preset low liquid level value, 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 first water replenishment valve A1 and the second water injection valve A2 to replenish the oxygen tank water supply pressure vessel H1 and the fuel tank water supply pressure vessel H2. When the liquid level value of the oxygen tank water supply pressure vessel H1 detected by the first liquid level gauge L1 reaches the preset high liquid level value, and the liquid level value of the fuel tank water supply pressure vessel H2 detected by the second liquid level gauge L2 reaches the preset high liquid level value, the water injection and replenishment control device K0 controls the closing of the water supply centrifugal pump inlet valve A0, the water supply centrifugal pump E0, the first water replenishment valve A1 and the second water injection valve A2 to stop replenishing the oxygen tank water supply pressure vessel H1 and the fuel tank water supply pressure vessel H2.

[0133] S3. The second stage of the internal pressure explosion test of the rocket stainless steel tank:

[0134] The fuel tank R is pressurized to the second pressure value P after the equatorial plane of the rear bottom of the tank becomes unstable and before it is destroyed. s2 , oxygen box pressurized to P s2 +ΔP s , determine the changes in the material, process structure performance, etc. of the second-stage test tank at the second pressure value after the rear bottom equatorial plane becomes unstable and before it is destroyed.

[0135] Specifically, the second stage pressurization test:

[0136] After the first stage of the pressurization test, the oxygen tank O and the fuel tank R will be re-pressurized step by step according to the automatic control operation steps of the first stage of the pressurization test. s When the pressure is 0.1 MPa, the fuel tank R is gradually pressurized to the second pressure value P with 0.1 MPa as the first level of pressurization. s2 ; The oxygen tank O is gradually pressurized to P s2 +0.1MPa.

[0137] Then the tank is depressurized:

[0138] According to the automatic depressurization operation steps of the first stage pressurization test, the oxygen tank O and the fuel tank R are depressurized step by step to 0MPa. When reducing the pressure step by step, 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, and the pressure unloading of the rocket stainless steel tank is gradually completed. The second stage pressurization test is completed, and the test parameters are recorded.

[0139] S4. The third stage of the internal pressure explosion test of the rocket stainless steel tank: the explosion test of the rocket stainless steel tank is carried out, and the process is as follows:

[0140] The oxygen tank O is gradually pressurized until an explosion occurs and then the pressurization is stopped, or the oxygen tank O is pressurized to the preset maximum pressure value P of the oxygen tank O. o And when the oxygen tank O does not explode, stop pressurizing.

[0141] The fuel tank R is gradually pressurized to the preset maximum pressure value P of the fuel tank R. r When the pressure is increased, the boost is stopped. r To prevent the oxygen box O from exploding and resisting the back pressure shock.

[0142] Determine the changes in the material, process structure performance, etc. of the tank after the oxygen tank O explodes or at the maximum pressure value in the third stage test.

[0143] Specifically, the third stage boost test:

[0144] After refilling the oxygen tank O and fuel tank R with water according to the automatic control operation steps of the rocket stainless steel tank filling and replenishing stage, the pressure is automatically increased step by step according to the automatic control steps of the first stage. With 0.1MPa as the first level of pressure increase, the fuel tank R is gradually pressurized to the maximum pressure value P of the fuel tank R. r When the pressure value of the oxygen tank O detected by the third pressure sensor P3 suddenly drops, the pressure of the oxygen tank O is stopped, or the oxygen tank O is gradually pressurized to the required maximum pressure value P o When , stop the oxygen tank O pressurization.

[0145] Then the tank is depressurized:

[0146] According to the automatic depressurization operation steps of the first stage pressurization test, the oxygen tank O and the fuel tank R are depressurized step by step to 0MPa. When reducing the pressure step by step, 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, gradually completing the depressurization of the rocket's stainless steel tank. The third stage of the pressurization test is completed, and the test parameters are recorded.

[0147] S5. The oxygen box pressurization control device K1 or the fuel box pressurization control device K2 controls the closing of the air supply valve B0, and discharges the gas in the first pressurization pipeline b1 and the second pressurization pipeline b2 and the oxygen box water supply pressure vessel H1 and the fuel box water supply pressure vessel H2, so that the pressure values ​​in the oxygen box water supply pressure vessel H1 and the fuel box water supply pressure vessel H2 are the atmospheric pressure values; manually open the second drain valve and the third drain valve to drain the water in the fire-fighting pipeline a0, the first liquid inlet pipeline a1, the second liquid inlet pipeline a2, the oxygen box liquid inlet pipeline a3, the fuel box liquid inlet pipeline a4, the oxygen box overflow exhaust drainage pipeline b3 and the fuel box overflow exhaust drainage pipeline b4.

[0148] Specifically, when the third stage of the pressurization test is completed, the oxygen box pressurization control device K1 or the fuel box pressurization control device K2 controls the closing of the air supply valve B0, and then the oxygen box pressurization control device K1 controls the opening of the first pressurization valve B1 and the first exhaust valve A5, and the fuel box pressurization control device K2 controls the opening of the second pressurization valve B2 and the second exhaust valve A6, to release the pressure in the first pressurization pipeline b1 and the second pressurization pipeline b2 and the oxygen box water supply pressure vessel H1 and the fuel box water supply pressure vessel H2. When the pressure value detected by the first pressure sensor P1 and the second pressure sensor P2 is the atmospheric pressure value, the oxygen box pressurization control device K1 controls the closing of the first pressurization valve B1 and the first exhaust valve A5, and the fuel box pressurization control device K2 controls the closing of the second pressurization valve B2 and the second exhaust valve A6. Then manually open all pipelines including the fire-fighting pipe a0, the first liquid inlet pipe a1, the second liquid inlet pipe a2, the oxygen tank liquid inlet pipe a3, the fuel tank liquid inlet pipe a4, the oxygen tank overflow exhaust and liquid drainage pipe b3 and the fuel tank overflow exhaust and liquid drainage pipe b4, as well as the second drain valve F2 and the third drain valve F3. After the water in the pipelines is drained, manually close the second drain valve F2 and the third drain valve F3. The internal pressure explosion test of the rocket stainless steel tank is completed.

[0149] The rocket tank pressurization internal pressure blasting process system and test method provided by the present invention can realize the online automatic control function of the test by combining gas and liquid media. Compared with manual operation, it can improve the working efficiency of the test and the accuracy of the test control, and reduce the risk of damage during the tank blasting test. In addition, the equipment investment cost in the present invention is relatively low, the process system and control program are simple and optimized, the pressurization pressure control accuracy is high, and the assessment parameters of the rocket stainless steel tank internal pressure blasting test can be obtained.

[0150] The above description is only an illustrative specific implementation manner of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A rocket tank pressurization internal pressure explosion process system, used for pressurizing a rocket stainless steel tank and performing an internal pressure explosion test, characterized in that: It includes a water injection and replenishment control device, an oxygen tank pressurization control device, a fuel tank pressurization control device, an oxygen tank water supply pressure vessel, a fuel tank water supply pressure vessel and a nitrogen pressurization distribution plate; 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 is connected to the oxygen tank water supply pressure vessel, the oxygen tank water supply pressure vessel is used to provide a water source for liquid pressurization for the oxygen tank; the fuel tank is connected to the fuel tank water supply pressure vessel, the fuel tank water supply pressure vessel is used to provide a water source for liquid pressurization for the fuel tank; The water injection and replenishment control device is used to control the water supply centrifugal pump to fill the oxygen box water supply pressure vessel, the fuel box water supply pressure vessel, and the oxygen box and the fuel box with water; the oxygen box pressurization control device is used to control the nitrogen pressurization distribution plate to provide pressurized nitrogen for the oxygen box water supply pressure vessel, and the fuel tank pressurization control device is used to control the nitrogen pressurization distribution plate to provide pressurized nitrogen for the fuel tank water supply pressure vessel; so as to complete the pressurized internal pressure explosion test of the rocket stainless steel tank.

2. The rocket tank pressurization internal pressure blasting process system according to claim 1 is characterized in that: The oxygen tank water supply pressure vessel is connected to the fire protection pipeline through a first liquid inlet pipeline, and the fuel tank water supply pressure vessel is connected to the first liquid inlet pipeline through a second liquid inlet pipeline; The oxygen box is connected to the fire fighting pipe via an oxygen box liquid inlet pipe, an oxygen box water injection pipe and the first liquid inlet pipe, and the fuel box is connected to the fire fighting pipe via a fuel box liquid inlet pipe, a fuel box water injection pipe and the second liquid inlet pipe; The fire fighting pipeline is connected to a fire fighting water pool, wherein the fire fighting water pool is used to provide water source for the oxygen tank water supply pressure vessel, the fuel tank water supply pressure vessel, and the oxygen tank and the fuel tank.

3. The rocket tank pressurization internal pressure blasting process system according to claim 2 is characterized in that: The water supply centrifugal pump is arranged on the fire-fighting pipeline, and a water supply centrifugal pump inlet valve is also arranged on the fire-fighting pipeline. The water supply centrifugal pump inlet valve is connected to the water injection and replenishment control device, and is used to open and close the fire-fighting pipeline; The first liquid inlet pipeline is provided with a first water replenishment valve, which is connected to the water injection and replenishment control device and is used to open and close the first liquid inlet pipeline; the second liquid inlet pipeline is provided with a second water injection valve, which is connected to the water injection and replenishment control device and is used to open and close the second liquid inlet pipeline; An oxygen box water injection valve is provided on the oxygen box water injection pipeline, and the oxygen box water injection valve is connected to the water injection and replenishment control device for opening and closing the oxygen box water injection pipeline; a fuel box water injection valve is provided on the fuel box water injection pipeline, and the fuel box water injection valve is connected to the water injection and replenishment control device for opening and closing the fuel box water injection pipeline.

4. The rocket tank pressurization internal pressure blasting process system according to claim 2 is characterized in that: The oxygen box water supply pressure vessel is connected to the oxygen box through an oxygen box liquid inlet pipeline, an oxygen box liquid inlet valve is provided on the oxygen box liquid inlet pipeline, and the oxygen box liquid inlet valve is connected to the oxygen box boost control device for opening and closing the oxygen box liquid inlet pipeline; The fuel tank water supply pressure vessel is connected to the fuel tank through a fuel tank liquid inlet pipe, and a fuel tank liquid inlet valve is provided on the fuel tank liquid inlet pipe. The fuel tank liquid inlet valve is connected to the fuel tank boost control device and is used to open and close the fuel tank liquid inlet pipe.

5. The rocket tank pressurization internal pressure blasting process system according to claim 4 is characterized in that: An oxygen tank liquid inlet valve is provided on the oxygen tank liquid inlet pipeline, and the oxygen tank liquid inlet valve is connected to the oxygen tank boost control device for opening and closing the oxygen tank liquid inlet pipeline; a fuel tank liquid inlet valve is provided on the fuel tank liquid inlet pipeline, and the fuel tank liquid inlet valve is connected to the fuel tank boost control device for opening and closing the fuel tank liquid inlet pipeline.

6. The rocket tank pressurization internal pressure blasting process system according to claim 1 is characterized in that: The nitrogen boosting distribution plate is connected to the oxygen tank water supply pressure vessel through a first boosting pipe, and the first boosting pipe is provided with an air supply valve and a first boosting valve; the nitrogen boosting distribution plate is connected to the fuel tank water supply pressure vessel through the first boosting pipe and the second boosting pipe, and the second boosting pipe is provided with a second boosting valve.

7. The rocket tank pressurization internal pressure blasting process system according to claim 6 is characterized in that: A first boosting orifice plate is arranged on the first boosting pipeline between the first boosting valve and the air inlet of the oxygen tank water supply pressure vessel; a second boosting orifice plate is arranged on the second boosting pipeline between the second boosting valve and the air inlet of the fuel tank water supply pressure vessel.

8. The rocket tank pressurization internal pressure blasting process system according to claim 1 is characterized in that: The oxygen tank water supply pressure vessel is connected to a first liquid level gauge, which is connected to the water injection and replenishment control device and is used to remotely monitor the water level in the oxygen tank water supply pressure vessel; The fuel tank water supply pressure vessel is connected to a second liquid level gauge, which is connected to a water injection and replenishment control device and is used for remotely monitoring the water level in the fuel tank water supply pressure vessel.

9. The rocket tank pressurization internal pressure blasting process system according to claim 1, characterized in that: The oxygen box water supply pressure vessel is connected to a first exhaust pipeline, a first exhaust valve is provided on the first exhaust pipeline, and the first exhaust valve is connected to the oxygen box pressurization control device for opening and closing the first exhaust pipeline; The fuel tank water supply pressure vessel is connected to a second exhaust pipe, a second exhaust pipe is provided with a second exhaust valve, and the second exhaust valve is connected to the fuel tank boost control device for opening and closing the second exhaust pipe.

10. A rocket tank pressurization internal pressure explosion test method based on the rocket tank pressurization internal pressure explosion process system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Water supply and replenishment stage before the test: The water injection and replenishment control device controls the opening of the fire-fighting pipeline and the first liquid inlet pipeline, the second liquid inlet pipeline, the oxygen tank water injection pipeline and the fuel tank water injection pipeline, so as to inject water and replenish water for the oxygen tank water supply pressure vessel, the fuel tank water supply pressure vessel, the oxygen tank and the fuel tank; The first stage of the rocket stainless steel tank internal pressure explosion test: The fuel tank is pressurized to the first pressure value P before the equatorial plane of the rear bottom of the tank becomes unstable s1 , oxygen box pressurized to P s1 +ΔP s , determine the changes in the material, process and structural performance of the first stage test tank at the first pressure value before the rear bottom equatorial plane becomes unstable; where ΔP s Indicates the amount of boost units to increase the level; The second stage of the rocket stainless steel tank internal pressure explosion test: The fuel tank is pressurized to the second pressure value P after the equatorial plane of the rear bottom of the tank becomes unstable and before it is destroyed. s2 , oxygen box pressurized to P s2 +ΔP s , determine the changes in the material, process and structural performance of the second-stage test tank at the second pressure value after the rear bottom equatorial plane becomes unstable and before it is destroyed; The third stage of the rocket stainless steel tank internal pressure explosion test: The process of blasting test on rocket stainless steel tank is as follows: The oxygen box is pressurized step by step until it explodes and then the pressurization is stopped, or the oxygen box is pressurized to the preset maximum pressure value P of the oxygen box. o When the oxygen tank does not explode, stop pressurizing; gradually pressurize the fuel tank to the preset maximum fuel tank pressure value P r When the pressure is increased, the boost is stopped; the maximum pressure value of the fuel tank is P r To prevent the pressure from the back pressure shock when the oxygen box explodes; to determine the changes in the material, process structure and performance of the tank after the third stage test oxygen box explodes or at the maximum pressure value; The oxygen box boost control device or the fuel box boost control device controls the closing of the first boost pipe, and discharges the gas in the first boost pipe and the second boost pipe and the oxygen box water supply pressure vessel and the fuel tank water supply pressure vessel, and discharges the water in the fire-fighting pipe, the first liquid inlet pipe, the second liquid inlet pipe, the oxygen box liquid inlet pipe, the fuel tank liquid inlet pipe, the oxygen box overflow exhaust and liquid drainage pipe, and the fuel tank overflow exhaust and liquid drainage pipe.

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