Propellant charge structural integrity monitoring device for long-term storage

Abstract

The application discloses a propellant charge structure integrity monitoring device for long-term storage and relates to the field of rocket fuel monitoring. The propellant charge structure integrity monitoring device for long-term storage comprises a water tank base, the water tank base is fixedly connected with a fixing frame, the fixing frame is fixedly connected with a servo motor, the output shaft of the servo motor is fixedly connected with a main gear, the fixing frame is rotationally connected with circumferentially distributed lead screws, the thread pitches of the circumferentially distributed lead screws are different, the circumferentially distributed lead screws are fixedly connected with from gears, the fixing frame is slidably connected with circumferentially distributed sliding inner shells, the water tank base and the fixing frame are slidably connected with circumferentially distributed sliding outer shells, the lead screws are threadedly connected with adjacent sliding inner shells, and the sliding inner shells are slidably connected with adjacent sliding outer shells. Different speeds of extrusion are simultaneously performed on the circumferentially distributed propellants, monitoring contrast is formed, and the accuracy of data is further improved.

Description

Technical Field

[0001] This invention relates to the field of rocket fuel monitoring, and more particularly to a propellant charge structure integrity monitoring device for long-term storage. Background Technology

[0002] Integrity testing of propellant charge structures is a crucial aspect of rocket manufacturing and launch, especially after long-term propellant storage. It is essential to ensure that there are no structural defects or cracks within the propellant. Common methods for propellant charge structure integrity testing are divided into non-destructive testing and destructive testing. Non-destructive testing includes X-ray inspection, ultrasonic testing, and infrared testing, while destructive testing includes mechanical testing and ignition testing. Mechanical testing primarily uses compression and tension to check the integrity of the propellant charge structure.

[0003] When performing mechanical testing on propellants, existing extrusion devices only perform a single extrusion, allowing observation of only one propellant sample at a time. This prevents simultaneous extrusion of multiple propellant samples for synchronous observation, making it impossible to create a control group. Consequently, the propellant test data is not accurate enough. Furthermore, uneven extrusion pressure during extrusion can cause the propellant to deviate and deform, resulting in a tilted extrusion direction and significant errors in the test data. Summary of the Invention

[0004] To overcome the shortcomings of existing extrusion devices, such as the lack of detection and control and the occurrence of skewed deformation during propellant extrusion, this invention provides a propellant charge structure integrity monitoring device for long-term storage to solve the above problems.

[0005] The technical solution is as follows: A propellant loading structure integrity monitoring device for long-term storage, comprising a water tank base, a fixed frame fixedly connected to the water tank base, a servo motor fixedly connected to the fixed frame, a main gear fixedly connected to the output shaft of the servo motor, and a circular array of lead screws rotatably connected to the fixed frame. The device is characterized in that: the thread pitches on the circular array of lead screws are all different; each of the circular array of lead screws is fixedly connected to a driven gear; the main gear meshes with the circumferentially distributed driven gears; the fixed frame is slidably connected to circumferentially distributed sliding inner shells; both the water tank base and the fixed frame are slidably connected to circumferentially distributed sliding outer shells; the lead screws are threadedly connected to adjacent sliding inner shells; the sliding inner shells are slidably connected to adjacent sliding outer shells; each sliding outer shell is provided with a fixing component for fixing the propellant; and each sliding outer shell is provided with a locking component for locking the fixing components.

[0006] Preferably, there is liquid between the sliding inner shell and the adjacent sliding outer shell, and liquid between the water tank base and the adjacent sliding outer shell, so that the sliding inner shell can apply uniform extrusion pressure to the propellant.

[0007] Preferably, the fixing component includes a fixing disk with circumferentially distributed straight grooves. The fixing disk is fixedly connected to an adjacent sliding housing. The sliding housing is rotatably connected to a rotating disk with circumferentially distributed inclined grooves. A limit pin is provided between the rotating disk and the fixing disk. A sliding frame is slidably connected between the straight groove of the fixing disk and the inclined groove of the adjacent rotating disk. Each circumferentially distributed sliding frame is fixedly connected to a fastening block.

[0008] Preferably, the locking assembly includes circumferentially distributed sealing cylinders, each of which is fixedly connected to an adjacent sliding housing. Each of the circumferentially distributed sealing cylinders is slidably connected to a sliding block. A return spring is fixedly connected between the sliding block and the sealing cylinder. A circumferentially distributed blocking slider is slidably connected to the sliding housing. The sliding block is fixed to an adjacent blocking slider by a cable, and the blocking slider is fixed to an adjacent sliding frame by a cable.

[0009] Preferably, the cross-sectional area of ​​the sliding block is larger than the cross-sectional area of ​​the blocking slider.

[0010] Preferably, the sliding shells located on the same vertical axis are fixedly connected and connected by a first and a second passage pipe that are circumferentially spaced at equal intervals, and adjacent first and second passage pipes are connected by a uniformly distributed first water bladder.

[0011] Preferably, a baffle is provided on the side of the first water bladder that is in contact with the propellant. The baffle is provided with diagonally distributed blocks, which are located above the water outlet side of the adjacent first pipe and below the water outlet side of the adjacent second pipe, respectively.

[0012] Preferably, the propellant is provided with symmetrically distributed concave holes, and a sliding shell is fixedly connected to and communicates with a second water bladder located in the concave holes. The concave holes are frustoconical in shape to increase the support force of the second water bladder on the propellant.

[0013] Preferably, the propellant is provided with symmetrically distributed grooves located in adjacent recesses to concentrate the supporting force of the second water bladder on the propellant.

[0014] Preferably, the central axis of the concave hole, the central axis of the fixing disk, and the central axis of the second water bladder are collinear to fix and hold the propellant.

[0015] The present invention has the following advantages:

[0016] 1. By synchronously rotating the main gear and the circumferentially distributed lead screws with different pitches, the propellant distributed in the circumferential direction is squeezed at different speeds, forming a monitoring comparison and further improving the accuracy of the data.

[0017] 2. By neutralizing the thrust deflection caused by prolonged use of the lead screw in the water between the sliding inner shell and the sliding outer shell, the propellant extrusion pressure is made uniform, increasing the stability of the propellant extrusion deformation and improving the accuracy of monitoring data.

[0018] 3. The second water bladder, in conjunction with the concave hole, applies circumferential support force to the propellant, increasing the propellant's compression stability and ensuring reliable and accurate monitoring data. Simultaneously, the expansion of the second water bladder, in conjunction with the circumferentially distributed spiral grooves, forms a support force that converges towards the center of the propellant, further improving the propellant's compression stability.

[0019] 4. By cooperating with the sliding block and the sliding frame, the fastening block is always in close contact with the propellant during extrusion, which prevents the propellant from being squeezed and deformed and separated from the fastening block, thus avoiding propellant deviation and errors in the test data.

[0020] 5. The first and second through-pipes work in conjunction with the first water bladder to form a circumferential support force on the propellant, further preventing the propellant from deviating during the extrusion process, ensuring that the propellant extrusion extension direction is located on its central axis, and improving the accuracy of detection.

[0021] 6. By using baffles and blocks to reduce the diameter of the outlet holes of the first and second pipes into the first water bladder, water begins to accumulate in the first water bladder, increasing support for the propellant and preventing propellant deflection. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a cross-sectional view of the sliding inner shell and the sliding outer shell of the present invention, as well as a three-dimensional structural diagram of the internal parts.

[0024] Figure 3 This is a three-dimensional structural diagram of the fixing component and locking component of the present invention.

[0025] Figure 4 This is a three-dimensional structural diagram of the concave hole and the second water bladder of the present invention.

[0026] Figure 5 This is a three-dimensional structural diagram of the sliding outer shell, the first through pipe, and the second through pipe of the present invention.

[0027] Figure 6 This is a three-dimensional structural diagram of the water tank base and sliding outer shell of the present invention.

[0028] Figure 7 This is a cross-sectional view of the first water bladder of the present invention and a three-dimensional structural schematic diagram of its internal parts.

[0029] The labels in the diagram are as follows: 101-Water tank base, 102-Fixing frame, 103-Servo motor, 104-Main gear, 105-Driven gear, 106-Lead screw, 201-Sliding inner shell, 202-Sliding outer shell, 3-Fixing component, 301-Fixing disc, 302-Rotating disc, 303-Sliding frame, 304-Fastening block, 4-Locking component, 401-Sealing cylinder, 402-Sliding block, 403-Reset spring, 404-Blocking slider, 501-First through pipe, 502-Second through pipe, 503-First water bladder, 504-Baffle, 505-Stop block, 601-Propellant, 602-Concave hole, 603-Groove, 604-Second water bladder. Detailed Implementation

[0030] The technical solution will be further described below with reference to specific embodiments. It should be noted that the terms "up," "down," "left," and "right" used in this document refer only to the position of the structure shown in the corresponding drawings. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, terms such as "connection" and "linkage" in this application include both direct and indirect connections (linkages).

[0031] Example 1: A device for monitoring the structural integrity of propellant charges for long-term storage, such as... Figure 1 and Figure 2As shown, the device includes a water tank base 101, a fixed frame 102 fixedly connected to the water tank base 101, a servo motor 103 fixedly connected to the upper end of the fixed frame 102, a main gear 104 fixedly connected to the output shaft of the servo motor 103, and three lead screws 106 arranged in a circular array rotatably connected to the fixed frame 102. The three lead screws 106 have different thread pitches and are all fixedly connected to driven gears 105. The main gear 104 meshes with the three driven gears 105 arranged circumferentially. Three sliding inner shells 201 arranged circumferentially are slidably connected to the fixed frame 102. Both the sliding inner shells 201 and the sliding outer shells 202 are cylindrical hollow structures. Water is placed between the sliding inner shells 201 and adjacent sliding outer shells 202. The water converts the uneven pressure of the sliding inner shells 201 into uniform pressure, allowing the sliding outer shells 202 to exert pressure on the propellant 601. A uniform compressive force is applied. The water tank base 101 and the fixing frame 102 are slidably connected to three circumferentially distributed sliding outer shells 202. Water is placed between the water tank base 101 and the three adjacent sliding outer shells 202. The lead screw 106 is threadedly connected to the adjacent sliding inner shell 201. The sliding inner shell 201 is slidably connected to the adjacent sliding outer shell 202. Each sliding outer shell 202 is provided with a fixing component 3 for fixing the propellant 601. Each sliding outer shell 202 is provided with a locking component 4 for locking the fixing component 3. The fixing component 3 and the locking component 4 cooperate to lock the propellant 601 during compression, preventing the sliding outer shell 202 from deforming or tilting when compressing the propellant 601. The main gear 104 rotates synchronously with the three circumferentially distributed lead screws 106, and the three circumferentially distributed propellants 601 are compressed at different speeds at the same time to form a monitoring comparison and further improve the accuracy of the data.

[0032] like Figures 5-7As shown, two sliding outer shells 202 located on the same vertical axis are fixedly connected and connected by a first pipe 501 and a second pipe 502 distributed circumferentially at equal intervals. Water pumps (not shown in the figure) are fixedly connected inside both the upper and lower sliding outer shells 202. The circumferentially distributed first pipes 501 are fixedly connected and connected to the water pump located in the upper sliding outer shell 202, and the water pump draws water from the upper sliding outer shell 202 to the lower sliding outer shell 202. The circumferentially distributed second pipes 502 are fixedly connected to the water pump located in the lower sliding outer shell 202, and the water pump draws water from the lower sliding outer shell 202 to the upper sliding outer shell 202. A uniformly distributed first water bladder 503 is provided and connected between adjacent first pipes 501 and second pipes 502. Water flows through the first pipes 501 and second pipes 502. In conjunction with the first water bladder 503, a circumferential support force is formed for the propellant 601, further preventing the propellant from deflecting during the extrusion process and ensuring that the extrusion extension direction of the propellant is located on its central axis, thereby improving the accuracy of detection. A baffle 504 is provided on the side of the first water bladder 503 that is in contact with the propellant 601. The baffle 504 is provided with two diagonally distributed blocks 505, which are located above the water outlet side of the adjacent first pipe 501 and below the water outlet side of the adjacent second pipe 502, respectively. By cooperating with the baffle 504 and the blocks 505, the water outlet diameter of the first pipe 501 and the second pipe 502 entering the first water bladder 503 is reduced, causing water to accumulate in the first water bladder 503, thereby increasing the support of the first water bladder 503 for the propellant and further preventing the propellant 601 from deflecting.

[0033] When the propellant 601 is first extruded, the propellant samples are placed between the upper and lower sliding shells 202. Water is then injected into all the sliding shells 202. The servo motor 103 is then turned on. The output shaft of the servo motor 103 drives the main gear 104 to rotate. The rotation of the main gear 104 drives the three circumferentially distributed driven gears 105 to rotate synchronously. The rotation of the three circumferentially distributed driven gears 105 drives the adjacent lead screws 106 to rotate synchronously. The rotation of the three lead screws 106 causes the sliding inner shell 201 on it to slide downwards towards the sliding shell 202. The three lead screws 106 have different pitches, so the sliding speeds of the three sliding inner shells 201 along the sliding shell 202 are different. At the same time, the three propellants 601 are extruded at different speeds to form a monitoring control and further improve the accuracy of the data.

[0034] Because the space between the sliding inner shell 201 and the sliding outer shell 202 is filled with water, when the propellant 601 is squeezed, the lead screw 106 drives the adjacent sliding inner shell 201 to squeeze the water. The rotation of the lead screw 106 causes the uneven pressure generated by the sliding inner shell 201 to be introduced into the water. Then the water converts the uneven pressure of the sliding inner shell 201 into a uniform pressure. Then the water pushes the sliding outer shell 202 with uniform pressure. The sliding outer shell 202 is squeezed by the uniform pressure of the water to compress the propellant 601. The water neutralizes the thrust deflection caused by the lead screw 106 after long-term use, and avoids the extrusion pressure of the propellant 601 from being skewed, which would cause the extrusion deformation of the propellant 601 to be skewed, resulting in errors in the monitoring data.

[0035] Simultaneously, during the compression of propellant 601, the circumferentially distributed first and second through pipes 501 and 502 are unidirectional pipes. Water pumps inside the sliding housing 202 are activated, allowing water from the upper sliding housing 202 to flow into the lower sliding housing 202, and vice versa. During compression, water from the upper sliding housing 202 flows through the first through pipe 501 and the first water bladder 503 into the lower sliding housing 202, and water from the lower sliding housing 202 flows through the second through pipe 502 and the first water bladder 503 into the upper sliding housing 202. At this time, the first water bladder 503 is filled with water and adheres to the circumferential side of propellant 601. The water in the first water bladder 503 provides circumferential support to propellant 601, further preventing deflection of propellant 601 during compression and ensuring that the compression extension direction of propellant 601 is located along its central axis, thus improving detection accuracy.

[0036] If the propellant 601 is deflected during compression, causing a localized bulge at a relatively equal circumferential position, this bulge will compress the first water bladder 503 in contact with it. This causes a depression at the contact surface between the first water bladder 503 and the propellant 601. This depression in the first water bladder 503 causes the baffle 504 inside to slide outwards. The baffle 504 then causes two diagonally distributed stops 505 to slide synchronously. These stops 505 then partially block the first and second pipes 501 from entering the outlet of the first water bladder 503, thereby reducing the water output of the first water bladder 503 and decreasing the water intake. When a difference occurs between the inflow and outflow, the inflow of water into the first pipe 501 and the second pipe 502 is greater than the outflow. Water begins to accumulate in the first water bladder 503. The increased water accumulation in the first water bladder 503 provides support for the propellant 601, preventing it from deflecting and avoiding a significant increase in the degree of deflection, which could lead to large errors in the detection data. At the same time, since the pumping volume into the sliding shell 202 remains constant due to the first pipe 501 and the second pipe 502, water gradually accumulates in the first water bladder 503 on both sides of the protrusion, further increasing the resistance to the deflection of the propellant 601 and preventing large errors in the detection data. This continues until the compression of the propellant 601 ends.

[0037] Example 2: Based on Example 1, such as Figure 2 and 3 As shown, the fixing component 3 includes a fixing disk 301, which has five circumferentially distributed straight grooves. The fixing disk 301 is fixedly connected to the sliding housing 202. The sliding housing 202 is rotatably connected to a rotating disk 302, which has five circumferentially distributed inclined grooves. A limit pin is provided between the rotating disk 302 and the fixing disk 301. The straight grooves of the fixing disk 301 are slidably connected to the adjacent inclined grooves of the rotating disk 302 by sliding frames 303. Each of the five circumferentially distributed sliding frames 303 is fixedly connected to a fastening block 304. The fastening block 304 clamps the propellant 601 by the cooperation between the fixing disk 301 and the rotating disk 302, so as to prevent the upper and lower sliding housings 202 from squeezing the propellant 601 and causing deflection.

[0038] like Figure 3As shown, the locking assembly 4 includes five circumferentially distributed sealing cylinders 401, each fixedly connected to the interior of an adjacent sliding housing 202. Each of the five circumferentially distributed sealing cylinders 401 has a sliding block 402 slidably connected inside it. The sliding block 402 is a circular plate. The outer side of each sealing cylinder 401 communicates with the sliding housing 202 for water pressure on the sliding block 402. A return spring 403 is fixedly connected between the sliding block 402 and the sealing cylinder 401. Five circumferentially distributed sealing sliders 404 are slidably connected to the sliding housing 202. The sliding block 402 is fixed to the adjacent sealing slider 404 by a cable, and the sealing slider 404 is fixed to the adjacent sliding frame 303 by a cable. The cross-sectional area of ​​the sliding block 402 is larger than that of the sealing slider 404, so that the contact area between the sliding block 402 and the water is larger than that between the sealing slider 404 and the water. This causes the water pressure to push the sliding block 402 to slide along the sealing cylinder 401, so that the circumferentially distributed fastening blocks 304 are always in close contact with and clamped to the propellant 601 when it is squeezed, thus preventing the center of the propellant 601 from deviating during the squeezing.

[0039] like Figure 4 As shown, the propellant 601 is provided with two symmetrically distributed concave holes 602, each concave hole 602 being frustoconical in shape. The sliding outer shell 202 is fixedly connected to and communicates with the second water bladder 604 within the concave holes 602, which increases the support force of the second water bladder 604 on the propellant 601. The propellant 601 is provided with symmetrically distributed grooves 603 located within adjacent concave holes 602, which concentrate the support force of the second water bladder 604 on the propellant 601. The central axis of the concave holes 602, the central axis of the fixing disk 301, and the central axis of the second water bladder 604 are collinear, which is used to fix and clamp the propellant 601 with the fastening block 304 and the second water bladder 604. The second water bladder 604, in cooperation with the concave holes 602, applies circumferential support force to the propellant 601, increasing the extrusion stability of the propellant 601 and making the monitoring data reliable and accurate. At the same time, the expansion of the second water bladder 604, in cooperation with the circumferentially distributed spiral grooves 603, forms a support force on the propellant 601, further improving the extrusion stability of the propellant.

[0040] When the staff tests the stored propellant 601, the sampled and processed propellant 601 is placed between two vertically distributed sliding shells 202 in three sets. The upper and lower second water bags 604 are placed in the two concave holes 602 of the propellant 601. Then the staff pulls out the limiting pin. At this time, the return spring 403 resets and drives the rotating disk 302 to rotate. The rotation of the rotating disk 302 drives the five circumferentially distributed sliding frames 303 to slide inward along the fixed disk 301. The five circumferentially distributed sliding frames 303 drive the fastening blocks 304 on them to contact and clamp the propellant 601. Then the remaining two sets of propellant 601 are clamped and fixed in sequence to avoid the propellant 601 tilting when squeezed, which would cause errors in the test data of the propellant 601.

[0041] When the sliding inner shell 201 compresses the water inside the adjacent sliding outer shell 202, the sliding outer shell 202 of the water tank base 101 located below simultaneously slides downwards along the water tank base 101. The water between the water tank base 101 and the adjacent sliding outer shell 202, and the water between the sliding inner shell 201 and the adjacent sliding outer shell 202, are driven by the compressive force into the adjacent second water bladder 604. The second water bladder 604 expands within the concave hole 602 and contacts the inner wall of the concave hole 602 of the propellant 601. Then the second water bladder 604 expands within the concave hole 602 of the propellant 601. The second water bladder 604 applies circumferential support force to the propellant 601 through the inclined surface of the concave hole 602, preventing the propellant 601 from deviating from its compression center. This prevents the propellant 601 from tilting during compression, which would make the monitoring data unreliable. At the same time, the concave hole 602 is provided with circumferentially distributed spiral grooves 603. When the second water bladder 604 expands into the circumferentially distributed spiral grooves 603, it further prevents the propellant 601 from shifting during compression, thus avoiding errors in data detection.

[0042] When propellant 601 is squeezed, it deforms, causing the fastening block 304 to detach from it. This loosens the clamping of the fastening block 304 on the propellant 601, making it prone to skewing when squeezed further. Therefore, during the squeezing of propellant 601, the water inside the upper and lower sliding shells 202 squeezes the sliding blocks 402 located in the sealing cylinders 401 inside the sliding shells 202. The five circumferentially distributed sliding blocks 402 slide along the adjacent sealing cylinders 401. When the return spring 403 is compressed, the sliding block 402 pulls the adjacent blocking slider 404 along the sliding shell 202 via the cable. The blocking slider 404 drives the sliding frame 303 to slide along the fixed plate 301 via the cable. The sliding frame 303 drives the fastening block 304 on it to always fit and clamp the propellant 601, so as to avoid separation from the circumferentially distributed fastening blocks 304 during the compression of the propellant 601. This would cause the propellant 601 to deflect when it is compressed by the sliding shell 202, resulting in errors in the elongation detection data of the propellant 601.

[0043] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A propellant charge structure integrity monitoring device for long-term storage, comprising a water tank base (101), a fixing frame (102) fixedly connected to the water tank base (101), a servo motor (103) fixedly connected to the fixing frame (102), a main gear (104) fixedly connected to the output shaft of the servo motor (103), and a lead screw (106) arranged in a circular array rotatably connected to the fixing frame (102), characterized in that: The screws (106) in the circular array have different thread pitches. Each screw (106) in the circular array is fixedly connected to a driven gear (105). The main gear (104) meshes with the driven gears (105) in the circumferential distribution. The fixed frame (102) is slidably connected to the sliding inner shell (201) in the circumferential distribution. The water tank base (101) and the fixed frame (102) are slidably connected to the sliding outer shell (202) in the circumferential distribution. The screws (106) are threadedly connected to the adjacent sliding inner shell (201). The sliding inner shell (201) is slidably connected to the adjacent sliding outer shell (202). Each sliding outer shell (202) is provided with a fixing component (3) for fixing the propellant (601). Each sliding outer shell (202) is provided with a locking component (4) for locking the fixing component (3). There is liquid between the sliding inner shell (201) and the adjacent sliding outer shell (202), and there is liquid between the water tank base (101) and the adjacent sliding outer shell (202) for the sliding inner shell (201) to apply uniform extrusion force to the propellant (601); The fixing component (3) includes a fixing disk (301), which is provided with circumferentially distributed straight grooves. The fixing disk (301) is fixedly connected to an adjacent sliding shell (202). The sliding shell (202) is rotatably connected to a rotating disk (302). The rotating disk (302) is provided with circumferentially distributed inclined grooves. A limit pin is provided between the rotating disk (302) and the fixing disk (301). A sliding frame (303) is slidably connected between the straight groove of the fixing disk (301) and the inclined groove of the adjacent rotating disk (302). Each of the circumferentially distributed sliding frames (303) is fixedly connected to a fastening block (304). The locking assembly (4) includes circumferentially distributed sealing cylinders (401), each of which is fixedly connected to an adjacent sliding housing (202). Each of the circumferentially distributed sealing cylinders (401) is slidably connected to a sliding block (402). A return spring (403) is fixedly connected between the sliding block (402) and the sealing cylinder (401). The sliding housing (202) is slidably connected to a circumferentially distributed blocking slider (404). The sliding block (402) is fixed to the adjacent blocking slider (404) by a cable. The blocking slider (404) is fixed to the adjacent sliding frame (303) by a cable.

2. The propellant charge structure integrity monitoring device for long-term storage as described in claim 1, characterized in that: The cross-sectional area of ​​the sliding block (402) is greater than that of the blocking slider (404).

3. The propellant charge structure integrity monitoring device for long-term storage as described in claim 1, characterized in that: The sliding shells (202) located on the same vertical axis are fixedly connected and connected by a first pipe (501) and a second pipe (502) that are circumferentially equally spaced. The adjacent first pipes (501) and second pipes (502) are connected by a uniformly distributed first water bladder (503).

4. The propellant charge structure integrity monitoring device for long-term storage as described in claim 3, characterized in that: A baffle (504) is provided on the side of the first water bladder (503) that is in contact with the propellant (601). The baffle (504) is provided with diagonally distributed blocks (505), and the diagonally distributed blocks (505) are respectively located above the water outlet side of the adjacent first pipe (501) and below the water outlet side of the adjacent second pipe (502).

5. The propellant charge structure integrity monitoring device for long-term storage as described in claim 1, characterized in that: The propellant (601) is provided with symmetrically distributed concave holes (602), and the sliding shell (202) is fixedly connected to and communicates with a second water bladder (604) located in the concave hole (602). The concave hole (602) is frustoconical and is used to increase the support force of the second water bladder (604) on the propellant (601).

6. The propellant charge structure integrity monitoring device for long-term storage as described in claim 5, characterized in that: The propellant (601) is provided with grooves (603) that are symmetrically distributed and located in adjacent recesses (602) to concentrate the supporting force of the second water bladder (604) on the propellant (601).

7. The propellant charge structure integrity monitoring device for long-term storage as described in claim 6, characterized in that: The central axis of the concave hole (602), the central axis of the fixing plate (301), and the central axis of the second water bladder (604) are collinear, which is used to fix and hold the propellant (601).

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