Rocket storage tank bottom hydraulic airtight testing device and system

Abstract

The invention relates to the technical field of spaceflight, and discloses a rocket tank bottom hydraulic air tightness testing device, which comprises a tank bottom plate, the tank bottom plate is used for storing experimental water, a hydraulic air tightness testing assembly is arranged on the tank bottom plate, and the hydraulic air tightness testing assembly is used for carrying out air tightness testing on rocket tank bottom hydraulic pressure. The hydraulic air tightness testing assembly comprises a tool assembly, a pure water tank, a recycling water tank, a water purifying assembly, an electric control box, a valve assembly box, an inflation sealing ring, a filter element installation box, a fixing clamping groove, a filter box cover and a filter element. Compared with traditional manual carrying, the hydraulic air tightness testing device is better in production efficiency, production cost, production cycle, economic benefit, digital factory management, convenience, practicability and the like, and has a better application prospect in the field of hydraulic air tightness testing of the bottom of the rocket storage tank.

Description

Technical Field

[0001] The invention relates to the technical field of aerospace, and in particular to a rocket tank bottom hydraulic airtightness testing device and system. Background Art

[0002] In the field of commercial aerospace, rocket tanks are important components of rockets, and their quality and reliability are directly related to the success or failure of the entire space mission. The hydraulic and airtightness test of the bottom of the rocket tank is a key step to ensure that the tank can withstand high pressure and maintain sealing during launch and flight. However, the traditional hydraulic and airtightness test method of the bottom of the rocket tank has many shortcomings, which seriously restricts production efficiency and product quality.

[0003] At the current stage, there are defects such as insufficient hydraulic airtight testing, manual installation of the box bottom, manual start of the water pump, open-loop control, poor dynamic characteristics, low testing efficiency, and manual recording of data. There are risks to personnel health, low degree of automation, long production cycle, low production efficiency, and low product qualification rate. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a rocket tank bottom hydraulic airtightness testing device and system, which solves the current problems of insufficient hydraulic airtightness testing, manual installation of the tank bottom, manual starting of the water pump, open-loop control, poor dynamic characteristics, low testing efficiency, manual recording of data, etc., as well as risks to personnel health, low degree of automation, long production cycle, low production efficiency and low product qualification rate.

[0006] (II) Technical solution

[0007] To achieve the above object, the present invention provides the following technical solutions: a rocket tank bottom hydraulic airtightness test device, comprising a tank bottom plate, the tank bottom plate is used to store experimental water, a hydraulic airtightness test assembly is arranged on the tank bottom plate, and the hydraulic airtightness test assembly is used to perform airtightness test on the hydraulic pressure of the rocket tank bottom;

[0008] The hydraulic airtight test components include tooling components, pure water tank, recovery water tank, water purification components, electric control box, valve component box, inflatable sealing ring, filter element installation box, fixed card slot, filter box cover, filter element, connecting rod, installation shaft, handle block, card slot;

[0009] The tooling assembly in the hydraulic airtight test assembly is arranged on the tank bottom plate, the inflatable sealing ring is arranged between the tooling assembly and the tank bottom plate, and the inflatable sealing ring is used for sealing between the tank bottom plate and the tooling assembly;

[0010] The pure water tank is fixedly connected to the bottom plate of the storage tank, the recovery water tank is fixedly connected to the bottom plate of the storage tank, the recovery water tank is used to recycle experimental water, the valve assembly box is fixedly connected to the bottom plate of the storage tank, the water purification assembly is fixedly connected to the bottom plate of the storage tank, and the water purification assembly is used to remove impurities, bacteria and other harmful substances in the water.

[0011] Preferably, the pure water tank is provided with a water inlet pipe, the water inlet pipe is communicated with the inflatable sealing ring, a valve component box is provided on the water inlet pipe, and a pipeline component composed of a pressure sensor, a temperature sensor, a solenoid valve, etc. is provided in the valve component box.

[0012] Preferably, a recovery pipe is fixedly connected to the recovery water tank, the recovery pipe is fixedly connected to the tooling assembly, and a water purification assembly is arranged on the recovery pipe, and the water purification assembly is used to filter the return water.

[0013] Preferably, the electric control box is arranged on the bottom plate of the storage tank, and the electric control box is used to control the operation of various components in the hydraulic airtightness test assembly.

[0014] Preferably, the water purification component is provided with a filter bin, which is connected to a recovery pipe. The filter bin is arranged inside the water purification component, and both ends of the filter bin are connected to the recovery pipe. The filter element installation box is fixedly connected to the middle position of the filter bin, and the filter element is arranged in the filter element installation box. The filter element is used to filter the water flowing through the filter bin.

[0015] Preferably, the filter box cover is fixedly connected to the top of the filter element, and a conical sealing ring for improving sealing is provided between the filter box cover and the filter element mounting box, and the lower end outer surface of the conical sealing ring is adapted to the inclined surface at the opening of the filter element mounting box.

[0016] Preferably, two fixing blocks are fixedly connected to the filter box cover, a connecting rod is rotatably connected between the two fixing blocks, an upper end of the connecting rod is rotatably connected to a rotating shaft, and both ends of the rotating shaft are fixedly connected to pressing rods.

[0017] Preferably, a fixed mounting frame is fixedly connected to an outer surface of one side of the filter element mounting box, and a plurality of fixed slots are provided on outer surfaces of two side plates of the fixed mounting frame, and the plurality of fixed slots are evenly distributed at equal distances.

[0018] Preferably, the installation shaft is fixedly connected between one end of the two pressing rods close to the fixed installation frame, both ends of the installation shaft are adapted to the fixed slots, and both ends of the installation shaft are fixedly connected with limit blocks for limiting.

[0019] Preferably, the handle block is rotatably connected between the ends of the two pressing rods away from the installation shaft, and a clamping seat is fixedly connected to a side of the filter element installation box away from the fixed installation frame, and the clamping groove is provided on the outer surface of the clamping seat.

[0020] A rocket tank bottom hydraulic airtightness test system, comprising a water purification module, a pure water tank, a recovery water tank, an electric control cabinet, a sealing ring, tooling equipment, pipelines and accessories;

[0021] The water purification equipment is fixedly connected to the pure water tank through pipelines, the pure water tank is fixedly connected to the sealing ring and the tooling equipment through pipelines, the recovery water tank is fixedly connected to the pure water tank and the water purification equipment through pipelines, and the electric control cabinet is connected to the above components by signal;

[0022] A rocket tank bottom hydraulic airtightness test system also includes: a self-test module, a sealing ring inflation module, a booster pump start module, and a pressure maintenance detection module;

[0023] The self-check module signal is connected with the sealing ring inflation module, the booster pump starting module is connected with the self-check module signal, and the pressure maintaining detection module is connected with the self-check module signal.

[0024] (III) Beneficial effects

[0025] Compared with the prior art, the present invention provides a rocket tank bottom hydraulic airtightness test device and system, which has the following beneficial effects:

[0026] 1. The rocket tank bottom hydraulic airtightness test device improves the shortcomings of the traditional test system through the rocket tank bottom hydraulic airtightness test system. The host computer can intuitively view the system operation status. Whether in terms of production efficiency, production cost, production cycle, economic benefit, digital factory management, convenience and practicality, it is superior to traditional manual handling, and has better application prospects in the field of rocket tank bottom hydraulic airtightness test.

[0027] 2. The rocket tank bottom hydraulic and airtightness testing system of the present invention is specially equipped with a rocket tank bottom hydraulic and airtightness testing system, which utilizes variable frequency closed-loop control, has a simple structure, good dynamic response characteristics, precise pressure control, stable operation, modular design, rapid maintenance, control functions, optimized process, and improved production efficiency.

[0028] 3. The rocket tank bottom hydraulic and airtightness test system adopts mature and advanced AC frequency conversion control motors, and the speed feedback system adopts digital display feedback to achieve closed-loop control and has good dynamic response characteristics; it has high flexibility, adopts programming control, and conducts Profinet communication; the control system adopts Siemens processor PLC, model CPU 1215C, to collect and convert temperature, pressure and other signals; the host computer adopts Advantech H610, and the display adopts Dell P1917S. The rocket tank bottom hydraulic and airtightness test system has an independent electronic control system and a visual human-machine interface.

[0029] 4. The hydraulic airtightness test device at the bottom of the rocket tank can move and adjust its position so as to enter the next one, and then pull it upward to repeatedly pull out the upper one, which makes it easy to remove and improves the convenience of replacement, avoiding the problem of the traditional method of increasing the volume due to absorbing too many impurities and being tightly attached to the inner wall when taking it out.

[0030] 5. The hydraulic airtightness testing device at the bottom of the rocket tank will be adjusted to a suitable position so that it is aligned with the , and pressed downward so that it can be clamped inside. At this time, it will be tightly stuck into the opening of , so that the sealing during filtration can be effectively guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the system composition of the present invention;

[0032] Figure 2 The present invention is a flow chart of the airtight process;

[0033] Figure 3 This is a flow chart of the airtightness test of the present invention;

[0034] Figure 4 It is a top view of the overall structure of the present invention;

[0035] Figure 5 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of the water purification component of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the pure water tank of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the water recovery tank of the present invention;

[0039] Fig. 9 This is a schematic diagram of the structure of the electric control box of the present invention;

[0040] Fig.10 This is a schematic diagram of the structure of the inflatable sealing ring of the present invention;

[0041] Fig.11 This is a schematic diagram of the structure of the filter element installation box of the present invention;

[0042] Fig.12 This is a schematic diagram of the fixed card slot structure of the present invention;

[0043] Fig.13 This is the main control interface diagram of the present invention;

[0044] Fig.14 Schematic diagram of the system level of the present invention.

[0045] In the figure: 1. Storage tank bottom plate; 2. Tooling assembly; 3. Pure water tank; 4. Recovery water tank; 5. Water purification assembly; 6. Electric control box; 7. Valve assembly box; 8. Water inlet pipe; 9. Recovery pipe; 10. Filter compartment; 11. Inflatable sealing ring; 12. Filter element installation box; 13. Fixed mounting frame; 14. Fixed slot; 15. Filter box cover; 16. Filter element; 17. Fixed block; 18. Connecting rod; 19. Rotating shaft; 20. Pressing rod; 21. Installation shaft; 22. Limit block; 23. Handle block; 24. Snap-in seat; 25. Snap-in slot; 26. Conical sealing ring. DETAILED DESCRIPTION

[0046] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0047] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, greater than, less than, exceed, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If there is a description of first or second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0049] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0050] See also Figure 1-14The present invention provides a new technical solution: a rocket tank bottom hydraulic airtightness test device and system, including a tank bottom plate 1, the tank bottom plate 1 is used to store experimental water, a hydraulic airtightness test assembly is arranged on the tank bottom plate 1, the hydraulic airtightness test assembly is used to perform airtightness test on the hydraulic pressure of the rocket tank bottom, and the hydraulic airtightness test assembly includes a tooling assembly 2, a pure water tank 3, a recovery water tank 4, a water purification assembly 5, an electric control box 6, a valve assembly box 7, an inflatable sealing ring 11, a filter element installation box 12, a fixed card slot 14, a filter box cover 15, a filter element 16, a connecting rod 18, a mounting shaft 21, a handle block 23, and a card slot 25;

[0051] The tooling assembly 2 in the hydraulic airtightness test assembly is arranged on the tank bottom plate 1, and the inflatable sealing ring 11 is arranged between the tooling assembly 2 and the tank bottom plate 1, and the inflatable sealing ring 11 is used for sealing between the tank bottom plate 1 and the tooling assembly 2;

[0052] Furthermore, the pure water tank 3 is fixedly connected to the tank bottom plate 1, the recovery water tank 4 is fixedly connected to the tank bottom plate 1, the recovery water tank 4 is used to recover experimental water, the valve assembly box 7 is fixedly connected to the tank bottom plate 1, the water purification assembly 5 is fixedly connected to the tank bottom plate 1, and the water purification assembly 5 is used to remove impurities, bacteria and other harmful substances in the water.

[0053] Furthermore, a water inlet pipe 8 is provided on the pure water tank 3, and the water inlet pipe 8 is communicated with the inflatable sealing ring 11. A valve assembly box 7 is provided on the water inlet pipe 8, and a pipeline assembly consisting of a pressure sensor, a temperature sensor, a solenoid valve, etc. is provided in the valve assembly box 7.

[0054] Furthermore, a recovery pipe 9 is fixedly connected to the recovery water tank 4, and the recovery pipe 9 is fixedly connected to the tooling assembly 2. The water purification assembly 5 is arranged on the recovery pipe 9, and the water purification assembly 5 is used to filter the return water. The water purification assembly 5 refers to mechanical equipment for producing pure water. The equipment includes components such as a pretreatment system, a reverse osmosis system, and a water storage and preservation system. It can effectively remove impurities, bacteria and other harmful substances in the water to ensure that the produced pure water meets specific standards and requirements, and mainly protects the bottom of the storage tank to prevent contamination and corrosion.

[0055] Furthermore, an electric control box 6 is arranged on the tank bottom plate 1, and the electric control box 6 is used to control the operation of each component in the hydraulic airtightness test assembly.

[0056] Furthermore, the water purification component 5 is provided with a filter bin 10, which is connected to the recovery pipe 9. The filter bin 10 is arranged in the water purification component 5, and both ends of the filter bin 10 are connected to the recovery pipe 9. The filter element installation box 12 is fixedly connected to the middle position of the filter bin 10, and the filter element 16 is arranged in the filter element installation box 12. The filter element 16 is used to filter the water flowing through the filter bin 10.

[0057] Furthermore, the filter box cover 15 is fixedly connected to the top of the filter element 16, and a conical sealing ring 26 for improving sealing is provided between the filter box cover 15 and the filter element installation box 12, and the outer surface of the lower end of the conical sealing ring 26 is adapted to the inclined surface at the opening of the filter element installation box 12.

[0058] Furthermore, two fixing blocks 17 are fixedly connected to the filter box cover 15, and a connecting rod 18 is rotatably connected between the two fixing blocks 17. The upper end of the connecting rod 18 is rotatably connected to a rotating shaft 19, and both ends of the rotating shaft 19 are fixedly connected to a pressing rod 20.

[0059] Furthermore, a fixed mounting frame 13 is fixedly connected to an outer surface of one side of the filter element mounting box 12 , and a plurality of fixed slots 14 are provided on outer surfaces of two side plates of the fixed mounting frame 13 , and the plurality of fixed slots 14 are evenly distributed at equal distances.

[0060] Furthermore, the installation shaft 21 is fixedly connected between one end of the two pressing rods 20 close to the fixed mounting frame 13, and both ends of the installation shaft 21 are adapted to the fixed slot 14. Both ends of the installation shaft 21 are fixedly connected with limit blocks 22 for limiting.

[0061] Furthermore, the handle block 23 is rotatably connected between the ends of the two pressing rods 20 away from the installation shaft 21 , and the side of the filter element installation box 12 away from the fixed installation frame 13 is fixedly connected with a clamping seat 24 , and the clamping groove 25 is opened on the outer surface of the clamping seat 24 .

[0062] Furthermore, the rocket tank bottom hydraulic airtightness test system should adopt mature and advanced AC variable frequency control motor, and the speed feedback system should adopt digital display feedback to achieve closed-loop control with good dynamic response characteristics; it should be highly flexible, adopt programming control, and carry out Profinet communication; the control system should adopt Siemens processor PLC, model CPU 1215C, to carry out temperature and pressure signal acquisition and conversion control; the host computer should adopt Advantech H610, and the display should adopt Dell P1917S;

[0063] The rocket tank bottom hydraulic and airtight test system is equipped with an independent electronic control system and a visual human-machine interface. It mainly includes the main control interface, system self-test, airtight debugging, hydraulic debugging, air ring inflation, manual control, parameter monitoring, data charts, alarm information, and system exit.

[0064] The rocket tank bottom hydraulic airtightness test system improves the shortcomings of the traditional test system, and the host computer can intuitively view the system operation status. Whether in terms of production efficiency, production cost, production cycle, economic benefits, digital factory management, convenience and practicality, it is superior to traditional manual handling, and has better application prospects in the field of rocket tank bottom hydraulic airtightness testing.

[0065] The present invention is a specially designed hydraulic airtightness test system for the bottom of a rocket tank. It utilizes variable frequency closed-loop control, has a simple structure, good dynamic response characteristics, precise pressure control, stable operation, modular design, rapid repair and maintenance, control functions, optimized processes, and improved production efficiency.

[0066] Furthermore, when it is necessary to replace and use, the cabinet door of the water purification component 5 is opened to take the handle block 23 out of the card slot 25. At this time, the pressing rod 20 will drive the connecting rod 18 and the filter box cover 15 and the filter element 16 thereon to move upward a distance through the rotating shaft 19, and then, by moving and adjusting the position of the handle block 23, the installation shaft 21 can enter the next fixed card slot 14, and then the handle block 23 is pulled upward, so that the handle block 23 can repeatedly pull out the filter element 16 on the filter box cover 15, which can make the filter element 16 easily removed, improve the convenience of replacing the filter element 16, and avoid the problem of the traditional method that the filter element 16 absorbs too many impurities and causes the volume to become larger, and it is tightly attached to the inner wall when taken out and is difficult to pull out.

[0067] Furthermore, when replacing a new filter element 16, the lower end of the filter element 16 is inserted into the filter element installation box 12, and then the installation shaft 21 is adjusted downward to the next fixed slot 14, and then the handle block 23 is pressed downward. The handle block 23 can press the filter element 16 into the filter element installation box 12 until the filter element 16 completely enters the filter element installation box 12, and then the installation shaft 21 is adjusted to a suitable fixed slot 14 so that the handle block 23 is aligned with the clamping slot 25, and the handle block 23 is pressed downward so that the handle block 23 can be clamped in the clamping slot 25, and at this time, the conical sealing ring 26 will be tightly clamped in the opening of the filter element installation box 12, so that the sealing performance of the filter element installation box 12 during filtration can be effectively guaranteed.

[0068] A rocket tank bottom hydraulic airtightness test system, characterized by comprising a water purification module, a pure water tank, a recovery water tank, an electric control cabinet, a sealing ring, tooling equipment, pipelines and accessories;

[0069] The water purification equipment is fixedly connected to the pure water tank through pipelines, the pure water tank is fixedly connected to the sealing ring and the tooling equipment through pipelines, the recovery water tank is fixedly connected to the pure water tank and the water purification equipment through pipelines, and the electric control cabinet is connected to the above components by signal;

[0070] A rocket tank bottom hydraulic airtightness test system also includes: a self-test module, a sealing ring inflation module, a booster pump start module, and a pressure maintenance detection module;

[0071] The self-test module signal is connected to the sealing ring inflation module, the booster pump start module is connected to the self-test module signal, and the pressure maintenance detection module is connected to the self-test module signal;

[0072] A rocket tank bottom hydraulic airtightness test system, the airtightness process flow is as follows:

[0073] First, set the predetermined target pressure value, and then the system starts self-testing to check whether it is qualified. If it fails, the previous step will be repeated;

[0074] After the test is qualified, the sealing ring inflation module is started, and the self-inspection module detects whether the sealing ring inflation is qualified. If the test fails, the previous step will be repeated;

[0075] After the test is qualified, the proportional valve starts to pump air, and the self-test module detects whether the preset target pressure is reached. If the test fails, the previous process will be repeated;

[0076] After the test is qualified, the pressure is maintained for 15 minutes. The self-test module detects whether the pressure maintenance is qualified. If the test fails, it will return to the initial step and start again;

[0077] The pressure relief will start after the test is qualified and the process will end;

[0078] A rocket tank bottom hydraulic airtightness test system, the airtightness test process is as follows:

[0079] First, preset the target pressure value, and then the system starts self-checking.

[0080] After the test is qualified, the sealing ring module starts to inflate, and the self-test module will detect whether the inflation is qualified. If the test fails, the previous step will be repeated;

[0081] After the test is qualified, the centrifugal pump starts to fill water, and then the self-test module detects whether the liquid level is full. If it is detected that it is not full, the previous step will be repeated;

[0082] Then the self-check module will detect whether the pressure reaches the target value. If it does not reach the target value, it will start the additional pump until it reaches the target value, and then maintain the pressure for 15 minutes. Then the self-check module will detect whether the pressure maintenance is qualified. If it fails the test, it will return to the initial step and start again;

[0083] After the test is passed, the pressure relief begins and the final airtight test is completed.

[0084] Working principle: when it is necessary to replace and use, open the cabinet door of the water purification component 5 and take the handle block 23 out of the card slot 25. At this time, the pressing rod 20 will drive the connecting rod 18 and the filter box cover 15 and the filter element 16 thereon to move upward a distance through the rotating shaft 19, and then, by moving and adjusting the position of the handle block 23, the installation shaft 21 can enter the next fixed card slot 14, and then pull the handle block 23 upward, so that the handle block 23 can repeatedly pull out the filter element 16 on the filter box cover 15, which can make the filter element 16 can be easily removed.

[0085] Furthermore, when replacing a new filter element 16, the lower end of the filter element 16 is inserted into the filter element installation box 12, and then the installation shaft 21 is adjusted downward to the next fixed slot 14, and then the handle block 23 is pressed downward. The handle block 23 can press the filter element 16 into the filter element installation box 12 until the filter element 16 completely enters the filter element installation box 12, and then the installation shaft 21 is adjusted to a suitable fixed slot 14 so that the handle block 23 is aligned with the clamping slot 25, and the handle block 23 is pressed downward so that the handle block 23 can be clamped in the clamping slot 25, and at this time, the conical sealing ring 26 will be tightly clamped in the opening of the filter element installation box 12, so that the sealing performance of the filter element installation box 12 during filtration can be effectively guaranteed.

[0086] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rocket tank bottom hydraulic airtightness test device, characterized in that: The invention comprises a tank bottom plate (1), the tank bottom plate (1) is used to store experimental water, a hydraulic and airtightness test assembly is arranged on the tank bottom plate (1), and the hydraulic and airtightness test assembly is used to perform an airtightness test on the hydraulic pressure of the bottom of the rocket tank; The hydraulic airtightness test assembly comprises a tooling assembly (2), a pure water tank (3), a recovery water tank (4), a water purification assembly (5), an electric control box (6), a valve assembly box (7), an inflatable sealing ring (11), a filter element installation box (12), a fixed card slot (14), a filter box cover (15), a filter element (16), a connecting rod (18), a mounting shaft (21), a handle block (23), and a card slot (25); The tooling assembly (2) in the hydraulic airtightness test assembly is arranged on the tank bottom plate (1), and the inflatable sealing ring (11) is arranged between the tooling assembly (2) and the tank bottom plate (1). The inflatable sealing ring (11) is used to seal between the tank bottom plate (1) and the tooling assembly (2); The pure water tank (3) is fixedly connected to the storage tank bottom plate (1), the recovery water tank (4) is fixedly connected to the storage tank bottom plate (1), the recovery water tank (4) is used to recover experimental water, the valve assembly box (7) is fixedly connected to the storage tank bottom plate (1), and the water purification assembly (5) is fixedly connected to the storage tank bottom plate (1).

2. A rocket tank bottom hydraulic and airtightness testing device according to claim 1, characterized in that: The pure water tank (3) is provided with a water inlet pipe (8), the water inlet pipe (8) is communicated with the inflation seal ring (11), a valve assembly box (7) is arranged on the water inlet pipe (8), and a pipeline assembly consisting of a pressure sensor, a temperature sensor, a solenoid valve, etc. is arranged in the valve assembly box (7).

3. A rocket tank bottom hydraulic and airtightness testing device according to claim 1, characterized in that: The recovery water tank (4) is fixedly connected with a recovery pipe (9), the recovery pipe (9) is fixedly connected to the tooling assembly (2), and the water purification assembly (5) is arranged on the recovery pipe (9), and the water purification assembly (5) is used to filter the return water.

4. A rocket tank bottom hydraulic and airtightness testing device according to claim 1, characterized in that: The electric control box (6) is arranged on the tank bottom plate (1), and the electric control box (6) is used to control the operation of various components in the hydraulic airtightness test assembly.

5. A rocket tank bottom hydraulic and airtightness testing device according to claim 1, characterized in that: The water purification component (5) is provided with a filter chamber (10), the filter chamber (10) is connected to the recovery pipe (9), the filter chamber (10) is arranged in the water purification component (5), both ends of the filter chamber (10) are connected to the recovery pipe (9), a filter element installation box (12) is fixedly connected to the middle end of the filter chamber (10), a filter element (16) is arranged in the filter element installation box (12), and the filter element (16) is used to filter water flowing through the filter chamber (10).

6. A rocket tank bottom hydraulic and airtightness testing device according to claim 5, characterized in that: The filter box cover (15) is fixedly connected to the top of the filter element (16), and a conical sealing ring (26) for improving the sealing performance is arranged between the filter box cover (15) and the filter element installation box (12), and the outer surface of the lower end of the conical sealing ring (26) is adapted to the inclined surface at the opening of the filter element installation box (12).

7. A rocket tank bottom hydraulic and airtightness testing device according to claim 6, characterized in that: The filter box cover (15) is fixedly connected to two fixing blocks (17), a connecting rod (18) is rotatably connected between the two fixing blocks (17), an upper end of the connecting rod (18) is rotatably connected to a rotating shaft (19), and both ends of the rotating shaft (19) are fixedly connected to pressing rods (20).

8. A rocket tank bottom hydraulic and airtightness testing device according to claim 7, characterized in that: A fixed mounting frame (13) is fixedly connected to an outer surface of one side of the filter element mounting box (12), and a plurality of fixed slots (14) are provided on the outer surfaces of two side plates of the fixed mounting frame (13), and the plurality of fixed slots (14) are evenly distributed at equal distances.

9. A rocket tank bottom hydraulic and airtightness testing device according to claim 8, characterized in that: The installation shaft (21) is fixedly connected between one end of the two pressing rods (20) close to the fixed installation frame (13), the two ends of the installation shaft (21) are adapted to the fixed card slot (14), and the two ends of the installation shaft (21) are fixedly connected with a limit block (22) for limiting position; The handle block (23) is rotatably connected between the ends of the two pressing rods (20) away from the installation shaft (21); a clamping seat (24) is fixedly connected to a side of the filter element installation box (12) away from the fixed installation frame (13); and a clamping groove (25) is provided on the outer surface of the clamping seat (24).

10. A rocket tank bottom hydraulic airtightness test system, characterized in that: Including water purification module, pure water tank, recycling water tank, electric control cabinet, sealing ring, tooling equipment, pipelines and accessories; The water purification equipment is fixedly connected to the pure water tank through pipelines, the pure water tank is fixedly connected to the sealing ring and the tooling equipment through pipelines, the recovery water tank is fixedly connected to the pure water tank and the water purification equipment through pipelines, and the electric control cabinet is connected to the above components by signal; A rocket tank bottom hydraulic airtightness test system also includes: a self-test module, a sealing ring inflation module, a booster pump start module, and a pressure maintenance detection module; The self-check module signal is connected with the sealing ring inflation module, the booster pump starting module is connected with the self-check module signal, and the pressure maintaining detection module is connected with the self-check module signal.

Images