阅读说明：本技术 一种航天飞机机身碳纤维复合材料承压壳体液压疲劳试验装置 (Hydraulic fatigue test device for carbon fiber composite pressure-bearing shell of aerospace plane body ) 是由 李天海 吴建玲 冯志辉 罗杰 张幸斐 陈冬雪 于 2021-09-16 设计创作，主要内容包括：本发明提供一种航天飞机机身碳纤维复合材料承压壳体液压疲劳试验装置,包括外箱体结构、密封盖板、待测试承压壳体、固定机构,所述固定机构设置有四个,四个所述固定机构呈圆周状分别在外箱体结构内的上顶板上端表面,所述待测试承压壳体通过四个固定机构上的弧形压板固定在箱体结构内的上顶板上端表面,所述密封盖板与外箱体结构铰接；本发明具有如下的有益效果：能够实现上顶板的上升以及下降,从而便于将待测试承压壳体放置在上顶板上,或从上顶板上取下；能够对不同大小的待测试承压壳体进行固定,在对待测试承压壳体进行测试时,使得待测试承压壳体不易发生晃动。(The invention provides a hydraulic fatigue test device for a carbon fiber composite pressure-bearing shell of a fuselage of a space plane, which comprises an outer box body structure, a sealing cover plate, a pressure-bearing shell to be tested and four fixing mechanisms, wherein the four fixing mechanisms are arranged in a circumferential manner and are respectively arranged on the upper end surface of an upper top plate in the outer box body structure; the invention has the following beneficial effects: the lifting and descending of the upper top plate can be realized, so that the pressure-bearing shell to be tested can be conveniently placed on the upper top plate or taken down from the upper top plate; can fix the not examination pressure-bearing shell that awaits measuring of equidimension for the examination pressure-bearing shell that awaits measuring is difficult for taking place to rock.)

1. The utility model provides a space plane fuselage carbon-fibre composite pressure-bearing shell hydraulic fatigue test device, includes outer box structure (1), sealed apron (2), examination pressure-bearing shell (3), fixed establishment (4) of awaiting measuring, its characterized in that: the device is characterized in that the number of the fixing mechanisms (4) is four, the four fixing mechanisms (4) are circumferentially distributed on the upper end surface of an upper top plate (103) in the outer box body structure (1), the to-be-tested pressure-bearing shell (3) is fixed on the upper end surface of the upper top plate (103) in the outer box body structure (1) through arc-shaped pressing plates (404) on the four fixing mechanisms (4), the sealing cover plate (2) is hinged to the outer box body structure (1), and the outer box body structure (1) comprises a testing outer box body (101), a baffle plate (102), the upper top plate (103), a liquid inlet (104), a liquid outlet (105), a first mounting seat (106), a rotary moving cylinder (107), a worm wheel (108), a base (109), a first transmission rod (110), a sliding block (111), a connecting rod (112), a telescopic rod (113), a telescopic sleeve (114), a first support rod (115), a second support rod (116), The fixing mechanism (4) comprises a mounting seat II (401), a fixing rod (402), an outer sleeve (403), an arc-shaped pressing plate (404), a reinforcing rod I (405), a reinforcing rod II (406), a pull rod (407), a moving rod (408), a motor II (409), a rotating rod I (410), a moving hole (411), a threaded column (412), a sliding groove (413) and a rotating rod II (414).

2. The space plane fuselage carbon fiber composite pressure-bearing shell hydraulic fatigue test device of claim 1, characterized in that: in the outer box body structure (1), a baffle (102) is fixed at the lower end inside the test outer box body (101), a step-shaped through groove is formed in the baffle (102), the upper top plate (103) is movably installed in the step-shaped through groove of the baffle (102), four symmetrically arranged bases (109) are installed at the bottom end inside the test outer box body (101), worm gears (108) are movably installed on the surface of the upper ends of the bases (109), a rotary moving cylinder (107) is fixed on the worm gears (108), a third support rod (117) is movably installed in the rotary moving cylinder (107) through threads, the upper ends of the third support rods (117) are connected with the upper top plate (103), four first installation seats (106) are arranged, the first installation seats (106) are fixed in the test outer box body (101), and the upper ends of the rotary moving cylinder (107) are movably connected with the first installation seats (106), the utility model discloses a test box, including test outer box (101) inside movable mounting have two transfer lines one (110) and the symmetry sets up, every equal movable mounting has slider (111) on transfer line one (110), movable mounting has bracing piece two (116) on slider (111), the other end swing joint of bracing piece two (116) is at last roof (103) lower extreme, front side and rear side respectively be fixed with a connecting rod (112) between slider (111), the left side be fixed with two telescopic link (113) on connecting rod (112), the right side be fixed with two telescope tube (114) on connecting rod (112), the right-hand member activity of telescopic link (113) sets up in telescope tube (114).

3. The space plane fuselage carbon fiber composite pressure-bearing shell hydraulic fatigue test device of claim 2, characterized in that: go up roof (103) lower extreme surface and set up two supporting shoe (121), every equal swing joint has two bracing pieces one (115) on supporting shoe (121), and is a plurality of the other end swing joint of bracing piece one (115) is respectively on telescopic link (113) and telescopic sleeve (114), the inside lower extreme movable mounting of test outer box (101) has transfer line two (118), pass through helical gear transmission between transfer line two (118) and two transfer lines one (110), install at the inside lower extreme of test outer box (101) motor one (119), pass through helical gear transmission between motor one (119) and transfer line two (118).

4. The space plane fuselage carbon fiber composite pressure-bearing shell hydraulic fatigue test device of claim 2, characterized in that: the right end and the left end of each transmission rod I (110) are respectively provided with a spiral line matched with a worm wheel (108), the lower end face of each worm wheel (108) is provided with a connecting rotating block (120), the upper end face of the base (109) is provided with a connecting rotating groove, the worm wheels (108) are movably connected with the base (109) through the connecting rotating blocks (120) and the connecting rotating grooves, the sliding blocks (111) are connected with the supporting rod III (117) in a screwed manner through threads, the upper top plate (103) and the baffle plate (102) are arranged in a sealed manner, when the test device is actually used, after the test on the to-be-tested pressure-bearing shell (3) is completed, the solution in the to-be-tested pressure-bearing shell (3) and the test outer box body (101) is discharged through the liquid discharge port (105), then the power supply of the motor I (119) is switched on, and the motor I (119) drives the transmission rod I (110) to rotate through the transmission rod II (118), because the two ends of the first transmission rod (110) are connected with the worm wheel (108), the rotary moving cylinder rotates, the third support rod (117) moves upwards and is installed on the first transmission rod (110) through threads in a sliding mode, the two sliders (111) on the same first transmission rod (110) move in opposite directions, the second support rod (116) supports the upper top plate (103), the telescopic rods (113) on the two connecting rods (112) return to the telescopic sleeves (114), the first support rod (115) supports the upper top plate (103), the telescopic rods (113) and the telescopic rods can limit the stroke of the sliders (111), the pressure-bearing shell (3) to be tested can be taken out conveniently, the same mode is adopted, and the pressure-bearing shell (3) to be tested can be placed on the upper top plate (103) conveniently.

5. The space plane fuselage carbon fiber composite pressure-bearing shell hydraulic fatigue test device of claim 1, characterized in that: in the fixing mechanism (4), a fixing rod (402) is fixed on the surface of the inward side of the second mounting seat (401), a moving hole (411) is formed in the fixing rod (402), a first rotating rod (410) is movably mounted in the moving hole (411), the left end of the first rotating rod (410) is arranged in the second mounting seat (401) and is connected with a second motor (409), the right end of the first rotating rod (410) is connected with a second rotating rod (414), a threaded column (412) is arranged on the second rotating rod (414), the inside of the moving rod (408) is designed as a cavity, the left end of the moving rod (408) is movably arranged in the moving hole (411), the threaded column (412) is in threaded connection with the inside cavity of the moving rod (408), an arc-shaped pressing plate (404) is fixed on the right end face of the moving rod (408), an outer ring surface of the moving rod (408) is provided with an outer sleeve (403), the upper end surface and the lower end surface of the outer sleeve (403) are both movably connected with pull rods (407), each mounting seat II (401) is both movably connected with two reinforcing rods II (406), each arc-shaped pressing plate (404) is both movably connected with two reinforcing rods I (405), each reinforcing rod I (405) is movably connected with the corresponding reinforcing rod II (406), and the upper end surface of each pull rod (407) is movably connected with the corresponding reinforcing rod I (112) through a connecting rod I (405).

6. The space plane fuselage carbon fiber composite pressure-bearing shell hydraulic fatigue test device of claim 5, characterized in that: four sliding grooves (413) are formed in the surface of the outer ring of the moving rod (408), the sliding grooves (413) are communicated with an inner cavity of the moving rod (408), a bearing seat is arranged in the inner cavity of the moving rod (408), four connecting blocks are arranged on the bearing seat and penetrate through the sliding grooves (413) to be fixed on the inner wall of the moving groove, the right end of the first rotating rod (410) is movably installed in the moving rod (408) through the bearing seat, when the moving rod (408) is located at the farthest position, the included angle between the pull rod (407) and the outer sleeve (403) is eighty-five degrees, when the test device is in actual use, the upper top plate (103) is lifted, then the pressure-bearing shell (3) to be tested is placed in the middle of the upper top plate (103), then the power supply of the second motor (409) is replaced, the second motor (409) can drive the first rotating rod (410), the rotating rod and the threaded column (412) to rotate, and the inner cavity of the moving rod (408) is in threaded connection, the movable rod (408) moves forwards, so that the arc-shaped pressing plate (404) fixes the pressure-bearing shell (3) to be tested, when the movable rod (408) moves to the maximum distance, the first reinforcing rod (405) and the second reinforcing rod (406) are in a horizontal state, so that the upper end and the lower end face of the arc-shaped pressing plate (404) are supported, and when the movable rod (408) is retracted, because a certain included angle is formed between the pull rod (407) and the outer sleeve (403), the first reinforcing rod (405) tends to be pulled downwards, so that the movable rod (408) is retracted conveniently.

Technical Field

The invention belongs to the technical field of material strength testing, and particularly relates to a hydraulic fatigue testing device for a carbon fiber composite pressure-bearing shell of a spacecraft fuselage.

Background

The high-strength carbon fiber composite material has designability in light weight, high strength and material performance, is convenient to move and is widely applied to aircrafts such as aerospace, airplanes and missiles, carbon fibers and composite material products thereof are one of the most rapidly developed high-tech materials in the world at present, such as a fuselage of the aerospace plane, a shell of the missiles, a shell of the fuselage of the airplane and the like are cylindrical pressure-bearing shells made of the carbon fiber composite material, and the pressure-bearing shells are one of the most important parts made of the carbon fiber composite material at present. The pressure-bearing shell is provided with connecting pipes besides a cylindrical barrel structure, the connecting pipes need to be interconnected, the geometric shape of the connecting area has sudden change which is inconsistent with the original shape, and the connecting area has the functions of additional load or bending moment besides the pressure effect, so that the stress distribution at the position is very complex, if the internal stress concentration level is very high due to unreasonable design, cracks are easily caused, and the cracks can continuously expand along with the load which is changed in a reciprocating manner on the structure, and finally the structure fails. The hydraulic fatigue test device used at present is generally directly connected with a pressure-bearing shell, no specific device is used for fixing the hydraulic fatigue test device, and the stability is poor. Therefore, a hydraulic fatigue test device for a carbon fiber composite pressure-bearing shell of a spacecraft fuselage is needed to solve the problem.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a hydraulic fatigue test device for a carbon fiber composite pressure-bearing shell of a spacecraft fuselage, so as to solve the problems in the background technology.

The invention is realized by the following technical scheme: the utility model provides a space plane fuselage carbon-fibre composite pressure-bearing casing hydraulic pressure fatigue test device, includes outer box structure, sealed apron, examination pressure-bearing casing, fixed establishment is provided with four, four fixed establishment is the upper end surface of the roof that the circumference form distributes in outer box structure, examination pressure-bearing casing passes through the arc clamp plate on four fixed establishment and fixes the roof upper end surface in outer box structure, sealed apron is articulated with outer box structure, outer box structure includes and tests outer box, baffle, roof, inlet, leakage fluid dram, mount pad one, rotatory movable cylinder, worm wheel, base, transfer line one, slider, connecting rod, telescopic link, telescopic sleeve, bracing piece one, bracing piece two, bracing piece three, transfer line two, motor one, connects the commentaries on classics piece and supporting shoe, fixed establishment includes mount pad two, motor one, connects commentaries on classics piece and supporting shoe, fixed establishment includes that mount pad two, The device comprises a fixed rod, an outer sleeve, an arc-shaped pressing plate, a first reinforcing rod, a second reinforcing rod, a pull rod, a moving rod, a second motor, a first rotating rod, a moving hole, a threaded column, a sliding groove and a second rotating rod.

Further, in the outer box structure, a baffle is fixed at the lower end inside the test outer box, a stepped through groove is formed in the baffle, an upper top plate is movably mounted in the stepped through groove of the baffle, four bases are symmetrically arranged at the bottom end inside the test outer box, worm gears are movably mounted on the surfaces of the upper ends of the bases, rotary moving cylinders are fixed on the worm gears, a third support rod is movably mounted in each rotary moving cylinder through threads, the upper ends of the third support rods are connected with the upper top plate, four first mounting seats are arranged, the first mounting seats are fixed in the test outer box, the upper ends of the rotary moving cylinders are movably connected with the first mounting seats, two first transmission rods are movably mounted in the test outer box and are symmetrically arranged, sliders are movably mounted on each first transmission rod, and a second support rod is movably mounted on each slider, the other end of the second supporting rod is movably connected to the lower end of the upper top plate, a connecting rod is fixedly arranged between the front side and the rear side of the second supporting rod, two telescopic rods are fixedly arranged on the connecting rod, two telescopic sleeves are fixedly arranged on the connecting rod, and the right end of each telescopic rod is movably arranged in each telescopic sleeve.

Furthermore, two supporting blocks are fixed on the surface of the lower end of the upper top plate, each supporting block is movably connected with two first supporting rods, the other ends of the first supporting rods are movably connected to a telescopic rod and a telescopic sleeve respectively, a second driving rod is movably installed at the lower end in the testing outer box body, the first driving rods and the second driving rods are driven through bevel gears, the first motor is installed at the lower end in the testing outer box body, and the first motor is driven through the bevel gears and the second driving rods.

Furthermore, the right end of the first transmission rod is provided with a spiral line matched with the worm wheel, the left end of the first transmission rod is provided with a spiral line matched with the worm wheel, the connecting rotating block is arranged on the lower end face of the worm wheel, the upper end face of the base is provided with the connecting rotating groove, the worm wheel is movably connected with the base through the connecting rotating block and the connecting rotating groove, the sliding block is connected with the third support rod in a screwing mode through threads, the upper top plate and the baffle plate are arranged in a sealing mode, when the test device is in actual use, after the test on the to-be-tested pressure-bearing shell is completed, the solution in the to-be-tested pressure-bearing shell and the solution in the test outer box are discharged through the liquid discharge port, then the power supply of the first motor is switched on, the first transmission rod is driven to rotate by the first motor through the second transmission rod, as the two ends of the first transmission rod are connected with the worm wheel, the rotary moving cylinder will rotate, and the third support rod will move upwards, and the sliding is installed on the first transmission rod through threads, the two sliding blocks on the same first transmission rod move in opposite directions, the second supporting rod can support the upper top plate, the telescopic rods on the two connecting rods return to the telescopic sleeves, the supporting rods can support the upper top plate for a while, the telescopic rods and the telescopic rods can also limit the stroke of the sliding blocks, and then the pressure-bearing shell to be tested can be taken out conveniently.

Furthermore, in the fixing mechanism, a fixing rod is fixed on the surface of one inward side of the mounting seat II, a moving hole is formed in the fixing rod, a first rotating rod is movably mounted in the moving hole, the left end of the first rotating rod is arranged in the mounting seat II and is connected with a second motor, the right end of the first rotating rod is connected with a second rotating rod, a threaded column is arranged on the second rotating rod, the interior of the moving rod is designed as a cavity, the left end of the moving rod is movably arranged in the moving hole, the threaded column is connected with a hole cavity in the moving rod through threads, an arc-shaped pressure plate is fixed on the right end face of the moving rod, an outer sleeve is arranged on the surface of the outer ring of the moving rod, pull rods are movably connected on the upper end surface and the lower end surface of the outer sleeve, two second reinforcing rods are movably connected on each mounting seat II, and two first reinforcing rods are movably connected on each arc-shaped pressure plate, the first reinforcing rod is movably connected with the second reinforcing rod, and the upper end surface of the pull rod is movably connected with the first reinforcing rod.

Furthermore, four sliding grooves are arranged on the surface of the outer ring of the moving rod respectively, the sliding grooves are communicated with the inner cavity of the moving rod, a bearing seat is arranged in the inner cavity of the moving rod, four connecting blocks are arranged on the bearing seat and penetrate through the sliding grooves to be fixed on the inner wall of the moving rod, the right end of the first rotating rod is movably arranged in the moving rod through the bearing seat, when the moving rod is at the farthest position, the included angle between the pull rod and the outer sleeve is eighty-five degrees, when the moving rod is in practical use, the upper top plate is lifted, then the pressure-bearing shell to be tested is placed in the middle of the upper top plate, then the power supply of the second motor is replaced, the second motor drives the first rotating rod, the rotating rod and the threaded column to rotate, and the moving rod moves forwards due to the threaded connection between the threaded column and the inner cavity of the moving rod, so that the arc-shaped pressure-bearing shell to be tested is fixed by the arc-shaped pressure plate, when the movable rod moves to the maximum distance, the first reinforcing rod and the second reinforcing rod are in a horizontal state, and therefore the upper end face and the lower end face of the arc-shaped pressing plate are supported.

After the technical scheme is adopted, the invention has the beneficial effects that: the invention provides a hydraulic fatigue test device for a carbon fiber composite material pressure-bearing shell of a spacecraft fuselage, which is provided with an outer testing box, an upper top plate, a rotary moving cylinder, a worm gear, a connecting rod, a first supporting rod, a second supporting rod and a third supporting rod.

The mounting base II, the fixing rod, the outer sleeve, the arc-shaped pressing plate, the moving rod, the rotating rod I and the threaded column are arranged, so that pressure-bearing shells to be tested with different sizes can be fixed, and the pressure-bearing shells to be tested are not prone to shaking when the pressure-bearing shells to be tested are tested.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a three-dimensional schematic diagram of a hydraulic fatigue test device for a carbon fiber composite pressure-bearing shell of a spacecraft fuselage.

FIG. 2 is a working schematic diagram of the hydraulic fatigue test device for the carbon fiber composite pressure-bearing shell of the fuselage of the space plane.

FIG. 3 is a schematic cross-sectional view at the position A-A of a connecting sleeve of the spacecraft fuselage carbon fiber composite pressure-bearing shell hydraulic fatigue test device.

FIG. 4 is a schematic diagram of the lifting transmission of the upper top plate of the hydraulic fatigue test device for the carbon fiber composite pressure-bearing shell of the fuselage of the space plane.

FIG. 5 is a cross section of a rotary moving cylinder of the device for testing hydraulic fatigue of a carbon fiber composite pressure-bearing shell of a spacecraft fuselage according to the invention.

FIG. 6 is a connection schematic diagram of a first support rod of the hydraulic fatigue test device for the carbon fiber composite pressure-bearing shell of the fuselage of the space plane.

FIG. 7 is an enlarged schematic diagram of a position B of a limit stop of the hydraulic fatigue test device for a carbon fiber composite pressure-bearing shell of a spacecraft fuselage

In the figure, 1-outer box structure, 2-sealing cover plate, 3-pressure-bearing shell to be tested, 4-fixing mechanism, 101-test outer box, 102-baffle plate, 103-upper top plate, 104-liquid inlet, 105-liquid outlet, 106-mounting seat I, 107-rotary movable cylinder, 108-worm gear, 109-base, 110-driving rod I, 111-sliding block, 112-connecting rod, 113-telescopic rod, 114-telescopic sleeve, 115-supporting rod I, 116-supporting rod II, 117-supporting rod III, 118-driving rod II, 119-motor I, 120-connecting rotary block, 121-supporting block, 401-mounting seat II, 402-fixing rod, 403-outer sleeve, 404-arc-shaped pressing plate, 405-reinforcing rod I, 405-reinforcing rod II, 406-reinforcing rod II, 407-pull rod, 408-moving rod, 409-motor II, 410-rotating rod I, 411-moving hole, 412-threaded column, 413-sliding groove and 414-rotating rod II

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a technical solution: a space plane fuselage carbon fiber composite material pressure-bearing shell hydraulic fatigue test device comprises an outer box body structure 1, a sealing cover plate 2, a pressure-bearing shell 3 to be tested and four fixing mechanisms 4, wherein the four fixing mechanisms 4 are arranged, the four fixing mechanisms 4 are circumferentially distributed on the upper end surface of an upper top plate 103 in the outer box body structure 1, the pressure-bearing shell 3 to be tested is fixed on the upper end surface of the upper top plate 103 in the outer box body structure 1 through arc-shaped pressing plates 404 on the four fixing mechanisms 4, the sealing cover plate 2 is hinged with the outer box body structure 1, the outer box body structure 1 comprises a testing outer box body 101, a baffle plate 102, an upper top plate 103, a liquid inlet 104, a liquid outlet 105, a mounting seat I106, a rotary moving cylinder 107, a worm gear 108, a base 109, a driving rod I110, a sliding block 111, a connecting rod 112, a telescopic rod 113, a telescopic sleeve 114, a supporting rod I115, a supporting rod II 116, a supporting rod III 117, The fixing mechanism 4 comprises a second mounting seat 401, a fixing rod 402, an outer sleeve 103, an arc-shaped pressing plate 404, a first reinforcing rod 405, a second reinforcing rod 406, a pull rod 407, a moving rod 408, a second motor 409, a first rotating rod 410, a moving hole 411, a threaded column 412, a sliding groove 413 and a second rotating rod 414.

Referring to fig. 3 to 6, in the external box structure 1, a baffle plate 102 is fixed at the lower end inside a test external box 101, a stepped through groove is formed on the baffle plate 102, an upper top plate 103 is movably installed in the stepped through groove of the baffle plate 102, four bases 109 are installed at the bottom end inside the test external box 101, four symmetrically arranged bases 109 are installed at the upper end surface of the bases 109, a worm gear 108 is movably installed on the worm gear 108, a rotary moving cylinder 107 is fixed on the worm gear 108, a support rod three 117 is movably installed in the rotary moving cylinder 107 through a thread, the upper end of the support rod three 117 is connected with the upper top plate 103, four mounting bases one 106 are installed, a mounting base one 106 is fixed in the test external box 101, the upper end of the rotary moving cylinder 107 is movably connected with a mounting base one 106, two transmission rods one 110 are movably installed inside the test external box 101 and symmetrically arranged, a slider 111 is movably installed on each transmission rod one 110, a slider 111 is movably installed on a slider 116, the other end of the second support rod 116 is movably connected to the lower end of the upper top plate 103, a connecting rod 112 is respectively fixed between the front side and the rear side sliding block 111, two telescopic rods 113 are fixed on the left connecting rod 112, two telescopic sleeves 114 are fixed on the right connecting rod 112, and the right end of each telescopic rod 113 is movably arranged in each telescopic sleeve 114.

Two supporting blocks 121 are fixed on the lower end surface of the upper top plate 103, each supporting block 121 is movably connected with two first supporting rods 115, the other ends of the first supporting rods 115 are movably connected to the telescopic rod 113 and the telescopic sleeve 114 respectively, the second driving rod 118 is movably installed at the lower end inside the test outer box body 101, the first driving rods 110 and the second driving rods 118 are in transmission through bevel gears, the first motor 119 is installed at the lower end inside the test outer box body 101, and the first motor 119 is in transmission through the bevel gears and the second driving rods 118.

The right end of the first transmission rod 110 is provided with a spiral line matched with the worm gear 108, the left end of the first transmission rod 110 is provided with a spiral line matched with the worm gear 108, the connecting rotating block 120 is arranged on the lower end surface of the worm gear 108, the upper end surface of the base 109 is provided with a connecting rotating groove, the worm gear 108 is movably connected with the base 109 through the connecting rotating block 120 and the connecting rotating groove, the slide block 111 is connected with the third support rod 117 through screw threads in a screwing manner, the upper top plate 103 and the baffle plate 102 are arranged in a sealing manner, when in actual use, after the test on the pressure-bearing shell 3 to be tested is completed, the solution in the pressure-bearing shell 3 to be tested and in the test outer box 101 is discharged through the liquid discharge port 105, then the power supply of the first motor 119 is switched on, the first motor 119 drives the first transmission rod 110 to rotate through the second transmission rod 118, because the two ends of the first transmission rod 110 are connected with the worm gear 108, the rotary moving cylinder 107 will rotate, and the third support rod 117 will move upwards, and the sliding device is arranged on the first transmission rod 110 through threads, the two sliding blocks 111 on the same first transmission rod 110 move oppositely, the second support rod 116 supports the upper top plate 103, the telescopic rods 113 on the two connecting rods 112 return to the telescopic sleeves 114, the first support rod 115 supports the upper top plate 103, the telescopic rods 113 and the telescopic rods 113 can limit the stroke of the sliding blocks 111, and then the pressure-bearing shell 3 to be tested can be taken out conveniently.

Referring to fig. 2, 3 and 7, in the fixing mechanism 4, a fixing rod 402 is fixed on the surface of the inward side of the second mounting seat 401, a moving hole 411 is formed in the fixing rod 402, a first rotating rod 410 is movably mounted in the moving hole 411, the left end of the first rotating rod 410 is disposed in the second mounting seat 401 and connected to a second motor 409, the right end of the first rotating rod 410 is connected to a second rotating rod 414, a threaded post 412 is disposed on the second rotating rod 414, the moving rod 408 is designed as a hollow cavity, the left end of the moving rod 408 is movably disposed in the moving hole 411, the threaded post 412 is connected to the bore inside the moving rod 408 through a thread, an arc-shaped pressing plate 404 is fixed on the right end of the moving rod 408, an outer sleeve 103 is disposed on the outer ring surface of the moving rod 408, pull rods 407 are movably connected to the upper end surface and the lower end surface of the outer sleeve 103, two reinforcing rods 401 are movably connected to each mounting seat 401, two reinforcing rods 405 are movably connected to each arc-shaped pressing plate 406, the first reinforcing rod 405 is movably connected with the second reinforcing rod 406, and the upper end surface of the pull rod 407 is movably connected with the first reinforcing rod 405 of the connecting rod 112.

Four sliding grooves 413 are arranged, four sliding grooves 413 are respectively arranged on the surface of the outer ring of the moving rod 408, the sliding grooves 413 are communicated with the inner cavity of the moving rod 408, a bearing seat is arranged in the inner cavity of the moving rod 408, four connecting blocks are arranged on the bearing seat and penetrate through the sliding grooves 413 to be fixed on the inner wall of the moving groove, the right end of the first rotating rod 410 is movably arranged in the moving rod 408 through the bearing seat, when the moving rod 408 is at the farthest position, the included angle between the pull rod 407 and the outer sleeve 103 is eighty-five degrees, when in actual use, the upper top plate 103 is lifted, then the pressure-bearing shell 3 to be tested is placed in the middle of the upper top plate 103, then the power supply of the second motor 409 is replaced, the second motor 409 drives the first rotating rod 410, the rotating rod and the threaded column 412 to rotate, because the threaded column 412 is connected with the inner cavity of the moving rod 408 through threads, the moving rod 408 moves forward, and the arc-shaped pressing plate 404 fixes the pressure-bearing shell 3 to be tested, when the movable rod 408 moves to the maximum distance, the first reinforcing rod 405 and the second reinforcing rod 406 are in a horizontal state, so that the upper end and the lower end face of the arc-shaped pressing plate 404 are supported, when the movable rod 408 is recovered, a certain included angle is formed between the pull rod 407 and the outer sleeve 103, the first reinforcing rod 405 tends to pull down, the movable rod 408 is conveniently recovered, after the pressure-bearing shell 3 to be tested is fixed, the liquid inlet 104 and the pressure-bearing shell to be tested are connected with a high-pressure plunger pump, the sealing cover plate 2 is covered, and then pressurization, pressure maintaining, pressure reducing and pressure maintaining operations are repeatedly performed in the test outer box body 101 and the pressure-bearing shell 3 to be tested.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.