Water storage overturning tool for hydrostatic test of metal pressure-bearing shell and use method of water storage overturning tool

Abstract

The invention discloses a metal pressure-bearing shell water pressure test water storage overturning tool and a using method, the metal pressure-bearing shell water pressure test water storage overturning tool comprises a supporting mechanism, the supporting mechanism is used for providing a supporting and overturning space, a transmission mechanism is arranged on the supporting mechanism and is used for providing overturning power, and an overturning mechanism is rotationally connected with the supporting mechanism and is used for overturning the metal pressure-bearing shell. The overturning mechanism is in transmission fit with the transmission mechanism and used for bearing and overturning the metal pressure-bearing shell, the fixing mechanism is detachably connected with the overturning mechanism and used for fixing the metal pressure-bearing shell, and auxiliary operation is completed through the steps of leveling of an overturning frame, shell fixing, overturning and erecting, water injection, water jacket cover connecting and the like when the metal pressure-bearing shell is used. The hydraulic test device solves the problems of unsafe hoisting, inconvenient operation, low water injection efficiency and the like in traditional operation, has the characteristics of stable structure, strong adaptability, convenient operation and high test efficiency, and is suitable for hydraulic tests of various metal pressure-bearing shells in the fields of aerospace, shipbuilding and the like.

Description

Technical Field

[0001] This invention belongs to the technical field of hydrostatic testing equipment for metal pressure-bearing shells, specifically relating to a water storage and inversion fixture for hydrostatic testing of metal pressure-bearing shells and its usage method. Background Technology

[0002] As a key component in aerospace, shipbuilding, chemical containers, and special equipment, the structural safety and sealing reliability of metal pressure-bearing shells directly determine the operational safety of the entire system. These shells are typically made of high-strength metal materials through spinning processes and generally have the structural characteristics of large size, thin walls, and large length-to-diameter ratio. Therefore, they must undergo rigorous hydrostatic testing during the manufacturing process to verify their structural integrity and sealing performance under design pressure.

[0003] The standard procedure for hydrostatic testing typically includes two core steps: first, filling the vertical metal pressure-bearing housing with water to completely remove internal air; and second, after completing the pressure holding test, completely draining the test water from the housing.

[0004] In existing technologies, before the hydrostatic test, the metal pressure-bearing shell must be connected to a special water jacket cover, and then both must be hoisted vertically into the water tank simultaneously. During the test, water is slowly injected into the shell through a hydrostatic system until it is full to expel air. The traditional operation method, which involves manual hoisting, has the following technical problems: 1. The metal pressure-bearing shell is heavy, and the operation of hoisting it to a vertical position is extremely difficult; 2. During the hoisting process, the metal pressure-bearing shell is prone to shaking when connected to the water jacket cover, which may cause the two to collide. This may not only damage the shell, but also pose a safety hazard of personnel injury. 3. The height of the shell after being erected usually exceeds the height of a human body, which causes great inconvenience to water injection and water jacket connection, resulting in low operating efficiency. 4. The spun shell needs to be turned over and its posture adjusted multiple times during the hydrostatic test to ensure complete air release. Manual operation is difficult to achieve complete air release and is labor-intensive. Therefore, we propose a water-filling and tilting fixture for hydrostatic testing of metal pressure-bearing shells and its usage method. Summary of the Invention

[0005] The purpose of this invention is to provide a water-filling and turning fixture for hydrostatic testing of metal pressure-bearing shells and a method for using it, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a water-filling and tilting fixture for hydrostatic testing of a metal pressure-bearing shell, comprising: A support mechanism is provided to offer support and space for rotation. A transmission mechanism, which is mounted on the support mechanism, is used to provide the power for tilting; A flipping mechanism is rotatably connected to the support mechanism and is driven by the transmission mechanism, used to support and flip the metal pressure-bearing shell; A fixing mechanism, which is detachably connected to the flipping mechanism, is used to fix the metal pressure-bearing housing.

[0007] Preferably, the support mechanism includes a base frame, columns, footboards, a standing platform, guardrails, a lower stop bar, and a limiting bar; The upright is fixedly connected to the base frame, the pedal, the standing platform, and the guardrail are all fixedly connected to the upright, and the lower stop bar and the limiting bar are all fixedly connected to the upright.

[0008] Preferably, the columns are evenly distributed around the base frame and are welded to the base frame to form a rigid frame; The footboard is used for operators to climb onto the standing platform, and the guardrail is arranged around the standing platform.

[0009] Preferably, both the lower stop and the limiting rod are arranged in the horizontal direction. The lower stop is used to limit the vertical flipping limit position of the flipping mechanism and prevent reverse flipping, and the limiting rod is used to limit the horizontal flipping limit position of the flipping mechanism.

[0010] Preferably, the transmission mechanism includes a transmission platform, a handwheel, a connecting rod, a bearing, a bearing housing, straight bevel gears, a transmission chain, and a reducer; The transmission platform is fixedly connected to the base frame, the bearing seat is fixed on the transmission platform, the bearing is assembled in the bearing seat, the connecting rod passes through the bearing, one end of which is fixedly connected to the handwheel and the other end is fixedly connected to the straight bevel gear, the reducer is fixedly connected to the base frame and its input end is engaged with the straight bevel gear, and the output end of the reducer is engaged with the tilting frame through the transmission chain.

[0011] Preferably, the flipping mechanism includes a flipping frame, an adjusting rod, an adjusting baffle, and a contour block; The tilting frame is rotatably connected to the standing platform and the column of the support mechanism via the bearing. The adjusting rod is fixed inside the tilting frame, the adjusting baffle is adjusted and placed on the adjusting rod, and the contour block is fixed on the tilting frame.

[0012] Preferably, the adjusting rods are provided in multiple pairs and are distributed at intervals along the length of the tilting frame. Each pair of adjusting rods is symmetrically arranged on both sides of the tilting frame, and the adjusting baffle is adapted to be placed on any pair of adjusting rods to adapt to metal pressure-bearing shells of different lengths.

[0013] Preferably, the contact surface of the contour block is adapted to the outer contour of the metal pressure-bearing shell, and the contact surface is provided with anti-damage rubber strips.

[0014] Preferably, the fixing mechanism is a fixing strap, with hooks at both ends, which are detachably connected to the flipping frame. At least three fixing points are provided along the length of the metal pressure-bearing shell, corresponding to the bottom, middle and top positions of the metal pressure-bearing shell respectively.

[0015] A method for using a water-filling inversion fixture for hydrostatic testing of a metal pressure-bearing shell, based on the water-filling inversion fixture, includes the following steps: S1. By rotating the handwheel, the transmission mechanism is driven to rotate, causing the tilting frame to tilt to a horizontal position, so that the tilting frame abuts against the limit rod for limitation; S2. Based on the length of the metal pressure-bearing shell to be tested and the installation requirements of the water jacket cover, determine the placement position of the adjusting baffle on the adjusting rod and fix it in place, reserving space for the installation of the water jacket cover. S3. The metal pressure-bearing shell is transported to the top of the tilting frame by the hoisting equipment. The operator climbs onto the standing platform to help place the metal pressure-bearing shell stably on the tilting frame, so that the bottom of the metal pressure-bearing shell abuts against the adjusting baffle and the bottle body fits against the conforming block. After removing the hoisting equipment's slings, the metal pressure-bearing shell is fixed to the tilting frame by the fixing straps. S4. The operator slowly rotates the handwheel to transmit power through the transmission mechanism, causing the tilting frame and the metal pressure-bearing housing fixed on it to slowly tilt until the tilting frame and the lower stop bar reach the limit position and the metal pressure-bearing housing is in a vertical state. S5. The operator inserts the large-diameter water injection pipe into the mouth of the vertical metal pressure-bearing shell on the standing platform, injects water into the metal pressure-bearing shell, observes the water level change, and closes the water injection valve when the metal pressure-bearing shell is about to be full of water. S6. Using hoisting equipment, transport the water jacket cap to the top of the bottle opening of the metal pressure shell and lower it slowly. The operator assists in guiding it from the standing platform so that the bottle opening of the metal pressure shell passes through the opening of the water jacket cap. The water jacket cap is then fixedly connected to the metal pressure shell with bolts. S7. Release the fixing straps from the metal pressure-bearing shell, lift the metal pressure-bearing shell with the water jacket cover connected by the hoisting equipment, move it above the water tank and slowly put it into the water tank for subsequent water pressure test.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. The tooling structure is stable and reliable. The support mechanism adopts a rigid frame formed by welding the bottom frame and multiple columns. It has a strong load-bearing capacity and can be adapted to metal pressure shells of different weights and sizes. The flipping process is smooth and without shaking, effectively reducing safety risks. 2. Convenient and efficient operation: The working platform, consisting of a standing platform, a footboard, and guardrails, allows operators to perform operations such as placing and fixing the shell and connecting the water jacket cover at close range, eliminating the need for working at height and solving the problem of inconvenient operation when the shell is vertical in traditional operations. 3. High adaptability: The multiple pairs of adjusting rods of the flipping mechanism, together with the adjustable baffles that can be placed in different positions, can meet the load-bearing requirements of metal pressure shells of different lengths. The adaptable design of the contour block and the anti-damage rubber strip ensure that various shells are placed stably and do not suffer surface damage. 4. The testing efficiency is greatly improved. The tooling can quickly switch the metal pressure shell to a vertical position. With the help of large-diameter water pipes for water injection, the water storage time is significantly shortened compared with the traditional water pressure system, which solves the problem of excessively long water injection time for large-volume shells. 5. Precise flipping control: The transmission mechanism consisting of a handwheel, straight bevel gear, transmission chain, and reduction gear can achieve smooth adjustment of the flipping speed. Combined with the limiting action of the lower stop and limit rod, it ensures that the flipping posture of the shell is precisely controllable and meets the exhaust requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 This is a top view of the structure of the present invention; Figure 4 for Figure 3 A schematic cross-sectional view of point A in the middle; Figure 5 This is a three-dimensional structural diagram of the flipping mechanism of the present invention; Figure 6 This is a three-dimensional structural diagram of the flipping mechanism of the present invention.

[0018] In the diagram: 1. Base frame; 2. Column; 3. Pedal; 4. Standing platform; 5. Guardrail; 6. Transmission platform; 7. Handwheel; 8. Connecting rod; 9. Bearing; 10. Bearing seat; 11. Straight bevel gear; 12. Transmission chain; 13. Lower stop bar; 14. Limit bar; 15. Adjusting rod; 16. Adjusting baffle; 17. Contouring block; 18. Reducer; 19. Metal pressure-bearing housing; 20. Tilting frame. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-6 The metal pressure-bearing shell hydrostatic test water storage tilting fixture provided by the present invention includes a support mechanism, a transmission mechanism, a tilting mechanism, and a fixing mechanism: Support mechanism: used to provide stable support and turning work space, including base frame 1, column 2, footboard 3, standing platform 4, guardrail 5, lower stop bar 13 and limit bar 14; The columns 2 are fixedly connected to the base frame 1. The 14 columns 2 are evenly distributed around the base frame 1 and form a rigid frame structure with the base frame 1 by welding, which enhances the overall load-bearing capacity and stability. The base frame 1 is 3178mm long and 2300mm wide. The column 2 has a cross-section of 54mm×54mm square and a height of 1180mm, which ensures that the support strength meets the load-bearing requirements of shells of different specifications. Step 3, standing platform 4, guardrail 5 and column 2 are all fixedly connected, and the three are fixedly connected in pairs to form a complete work platform structure; step 3 is used for operators to climb to standing platform 4, standing platform 4 provides working and standing space for operators, and guardrail 5 is set around standing platform 4 to ensure the safety of operators. Both the lower stop rod 13 and the limiting rod 14 are fixedly connected to the column 2 in the horizontal direction. The lower stop rod 13 is used to limit the vertical flipping limit position of the flipping mechanism and prevent it from flipping in the opposite direction. The limiting rod 14 is used to limit the horizontal flipping limit position of the flipping mechanism to ensure that the flipping process is accurate and controllable. Transmission mechanism: mounted on the support mechanism, used to provide smooth tilting power, including transmission platform 6, handwheel 7, connecting rod 8, bearing 9, bearing seat 10, straight bevel gear 11, transmission chain 12 and reducer 18; The transmission platform 6 is fixedly connected to the base frame 1, providing an installation base for the transmission components; the bearing seat 10 is fixed on the transmission platform 6, and the bearing 9 is assembled in the bearing seat 10 to ensure the smoothness of the transmission process. The connecting rod 8 is inserted into the bearing 9. One end of the connecting rod 8 is fixed to the handwheel 7, and the other end is fixed to the straight bevel gear 11. The rotation of the handwheel 7 drives the connecting rod 8 and the straight bevel gear 11 to rotate synchronously. The reducer 18 is fixedly connected to the base frame 1 and its input end is driven by the straight bevel gear 11. The output end of the reducer 18 is connected to the tilting frame 20 through the transmission chain 12 to adjust the tilting speed, ensuring that the tilting mechanism tilts slowly and smoothly, and avoiding the housing from shaking or being damaged due to excessively fast tilting. Tilting mechanism: Rotatably connected to the support mechanism and driven by the transmission mechanism, used to carry and tilt the metal pressure shell 19, including a tilting frame 20, an adjusting rod 15, an adjusting baffle 16 and a contour block 17; The tilting frame 20 is rotatably connected to the standing platform 4 and column 2 of the support mechanism via bearing 9, ensuring that the tilting process is flexible and smooth; Adjusting rods 15 are fixed inside the tilting frame 20. They are arranged in multiple pairs and distributed at intervals along the length of the tilting frame 20. Each pair of adjusting rods 15 is symmetrically arranged on both sides of the tilting frame 20. A total of 4 pairs of adjusting rods 15 are provided to adapt to metal pressure-bearing shells 19 of different lengths. The adjusting baffle 16 can be selectively placed on the adjusting rod 15 and can be adapted to be placed on any pair of adjusting rods 15 to support metal pressure shells 19 of different lengths. The installation space for the water jacket cover is reserved by adjusting the placement position. The contour block 17 is fixed on the flipping frame 20. Its contact surface is adapted to the outer contour of the metal pressure-bearing housing 19. The contact surface is provided with anti-damage rubber strips to prevent surface damage when the metal pressure-bearing housing 19 comes into contact with the contour block 17. Fixing mechanism: Detachably connected to the flipping mechanism, used to fix the metal pressure-bearing housing 19, the fixing mechanism is a fixing strap; The two ends of the fixing strap are equipped with hooks, which can be detachably connected to the flip frame 20 for easy fixing and removal; The fixing straps are provided with at least three fixing points along the length of the metal pressure-bearing housing 19, corresponding to the bottom, middle and top positions of the metal pressure-bearing housing 19 respectively, to ensure that the housing is stable and reliable during the flipping process and does not shift or shake.

[0021] This invention also provides a method for using the water storage and tilting fixture for hydrostatic testing of metal pressure-bearing shells, which includes the following steps based on the above-mentioned water storage and tilting fixture: S1. By rotating the handwheel 7, the transmission mechanism is driven to operate. The transmission chain 12 drives the straight bevel gear 11 to rotate, which in turn drives the tilting frame 20 to rotate to a horizontal position, so that the tilting frame 20 abuts against the limit rod 14 to limit it, ensuring that the tilting frame 20 remains in a horizontal state. S2. Based on the length of the metal pressure-bearing shell 19 to be tested and the installation requirements of the water jacket cover, determine the placement position of the adjusting baffle 16 on the adjusting rod 15 and fix it in place, ensuring that the distance from the adjusting baffle 16 to the top of the flipping frame 20 is less than the length of the metal pressure-bearing shell 19, and reserve the space required for the installation of the water jacket cover. S3. The metal pressure-bearing shell 19 is transported to the top of the tilting frame 20 using hoisting equipment. The operator climbs onto the standing platform 4 and helps to place the metal pressure-bearing shell 19 stably on the tilting frame 20, so that the bottom of the metal pressure-bearing shell 19 abuts against the adjusting baffle 16 and the bottle body fits against the contour block 17, ensuring that the shell is in the center position. After removing the hoisting equipment's slings, the metal pressure-bearing shell 19 is fixed to the tilting frame 20 using fixing straps. The three fixing points correspond to the bottom, middle and top of the shell, respectively, to ensure that it is fixed firmly. S4. The operator slowly rotates the handwheel 7 to transmit power through the transmission mechanism, causing the tilting frame 20 and the metal pressure-bearing housing 19 fixed on it to slowly tilt. Under the speed regulation of the reducer 18, the tilting speed is prevented from being too fast. Until the tilting frame 20 and the lower stop bar 13 reach the limit position, the metal pressure-bearing housing 19 is in a vertical state. S5. The operator inserts the large-diameter water injection pipe into the bottle mouth of the vertical metal pressure-bearing housing 19 on the standing platform 4, and injects water into the metal pressure-bearing housing 19. The large-diameter water pipe improves the water injection efficiency and shortens the water storage time. Observe the water level change. When the metal pressure-bearing housing 19 is about to be filled with water, close the water injection valve to complete the water storage operation. S6. The water jacket cap is transported to the top of the bottle opening of the metal pressure housing 19 using hoisting equipment and slowly lowered. The operator assists in guiding the operation from the standing platform 4 to ensure that the bottle opening of the metal pressure housing 19 is accurately inserted into the opening of the water jacket cap and to avoid collision between the two. The water jacket cap is fixedly connected to the metal pressure housing 19 with bolts to ensure a reliable connection seal. S7. Release the fixing straps from the metal pressure-bearing housing 19, lift the metal pressure-bearing housing 19 with the water jacket cover connected by the hoisting equipment, move it above the water tank and slowly put it into the water tank to carry out the subsequent water pressure test procedures such as pressurization and pressure holding.

[0022] In this embodiment, the above-mentioned tooling is used to perform a hydrostatic test and water storage tilting operation on a hydrogen storage metal pressure-bearing shell 19 with a length of 2130mm, a diameter of 530mm, and a volume of 385L. The specific steps are as follows: S1. The operator turns the handwheel 7 to drive the transmission mechanism to run. The transmission chain 12 drives the straight bevel gear 11 to rotate, which in turn drives the tilting frame 20 to tilt to a horizontal position, so that the tilting frame 20 abuts against the limit rod 14 to keep the tilting frame 20 horizontal. S2. Based on the length of the metal pressure shell 19 (2130mm) and the installation requirements of the water jacket cover, determine the placement position of the adjusting baffle 16, place the adjusting baffle 16 on the second layer adjusting rod 15, and the length from the adjusting baffle 16 to the top of the flip frame 20 is 1955mm, leaving space for the installation of the water jacket cover. S3. The metal pressure-bearing shell 19 is transported to the top of the tilting frame 20 by the hoisting equipment. The operator climbs onto the standing platform 4 and helps to place the metal pressure-bearing shell 19 stably on the tilting frame 20, so that the bottom of the shell abuts against the adjusting baffle 16 and the bottle body fits against the contour block 17. After removing the hoisting slings, the metal pressure-bearing shell 19 is fixed to the tilting frame 20 by the fixing straps. The three fixing points correspond to the bottom, middle and top of the shell, respectively. S4. The operator slowly rotates the handwheel 7 to transmit power through the transmission mechanism. Under the speed regulation of the reducer 18, the tilting frame 20 and the metal pressure-bearing housing 19 are slowly tilted until the tilting frame 20 and the lower stop bar 13 are in contact and limited, and the metal pressure-bearing housing 19 is in a vertical state. S5. The operator inserts the large-diameter water injection pipe into the metal pressure-bearing housing 19 bottle mouth on the standing platform 4, injects water into the housing, observes the water level change, and closes the water injection valve when the housing is about to be full of water. S6. The water jacket cover is transported to the top of the bottle mouth of the metal pressure shell 19 by hoisting equipment and slowly lowered. The operator assists in guiding it on the standing platform 4 so that the bottle mouth of the shell is inserted into the opening of the water jacket cover. The water jacket cover is fixedly connected to the metal pressure shell 19 by bolts. S7. Release the fixing straps from the metal pressure-bearing housing 19, lift the metal pressure-bearing housing 19 with the water jacket cover connected by the hoisting equipment, move it above the water tank and slowly put it into the water tank for subsequent water pressure test.

[0023] The present invention has the following beneficial effects: 1. The tooling structure is stable and reliable. The support mechanism adopts a rigid frame formed by welding the bottom frame and multiple columns. It has a strong load-bearing capacity and can be adapted to metal pressure shells of different weights and sizes. The flipping process is smooth and without shaking, effectively reducing safety risks. 2. Convenient and efficient operation: The working platform, consisting of a standing platform, a footboard, and guardrails, allows operators to perform operations such as placing and fixing the shell and connecting the water jacket cover at close range, eliminating the need for working at height and solving the problem of inconvenient operation when the shell is vertical in traditional operations. 3. High adaptability: The multiple pairs of adjusting rods of the flipping mechanism, together with the adjustable baffles that can be placed in different positions, can meet the load-bearing requirements of metal pressure shells of different lengths. The adaptable design of the contour block and the anti-damage rubber strip ensure that various shells are placed stably and do not suffer surface damage. 4. The testing efficiency is greatly improved. The tooling can quickly switch the metal pressure shell to a vertical position. With the help of large-diameter water pipes for water injection, the water storage time is significantly shortened compared with the traditional water pressure system, which solves the problem of excessively long water injection time for large-volume shells. 5. Precise flipping control: The transmission mechanism consisting of a handwheel, straight bevel gear, transmission chain, and reduction gear can achieve smooth adjustment of the flipping speed. Combined with the limiting action of the lower stop and limit rod, it ensures that the flipping posture of the shell is precisely controllable and meets the exhaust requirements.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-filling inversion fixture for hydrostatic testing of a metal pressure-bearing shell, characterized in that, include: A support mechanism is provided to offer support and space for rotation. A transmission mechanism, which is mounted on the support mechanism, is used to provide the power for tilting; A flipping mechanism is rotatably connected to the support mechanism and is driven by the transmission mechanism, used to support and flip the metal pressure-bearing shell; A fixing mechanism, which is detachably connected to the flipping mechanism, is used to fix the metal pressure-bearing housing.

2. The water-filling and tilting fixture for hydrostatic testing of a metal pressure-bearing shell according to claim 1, characterized in that: The support mechanism includes a base frame (1), a column (2), a footboard (3), a standing platform (4), a guardrail (5), a lower stop bar (13), and a limiting bar (14). The column (2) is fixedly connected to the base frame (1), the pedal (3), the standing platform (4), the guardrail (5) are all fixedly connected to the column (2), and the lower stop bar (13) and the limiting bar (14) are all fixedly connected to the column (2).

3. The water-filling and tilting fixture for hydrostatic testing of a metal pressure-bearing shell according to claim 2, characterized in that: The columns (2) are evenly distributed around the base frame (1) and are welded to the base frame (1) to form a rigid frame; The step (3) is used for operators to climb to the standing platform (4), and the guardrail (5) is arranged around the standing platform (4).

4. The water-filling and tilting fixture for hydrostatic testing of a metal pressure-bearing shell according to claim 2, characterized in that: The lower stop (13) and the limiting rod (14) are both arranged in the horizontal direction. The lower stop (13) is used to limit the vertical flipping limit position of the flipping mechanism and prevent reverse flipping. The limiting rod (14) is used to limit the horizontal flipping limit position of the flipping mechanism.

5. The water-filling tilting fixture for hydrostatic testing of a metal pressure-bearing shell according to claim 2, characterized in that: The transmission mechanism includes a transmission platform (6), a handwheel (7), a connecting rod (8), a bearing (9), a bearing seat (10), a straight bevel gear (11), a transmission chain (12), and a reducer (18). The transmission platform (6) is fixedly connected to the bottom frame (1), the bearing seat (10) is fixed on the transmission platform (6), the bearing (9) is assembled in the bearing seat (10), the connecting rod (8) passes through the bearing (9), one end of which is fixedly connected to the handwheel (7) and the other end is fixedly connected to the straight bevel gear (11), the reducer (18) is fixedly connected to the bottom frame (1) and its input end is in transmission cooperation with the straight bevel gear (11), and the output end of the reducer (18) is connected to the tilting frame (20) through the transmission chain (12).

6. The water-filling and tilting fixture for hydrostatic testing of a metal pressure-bearing shell according to claim 5, characterized in that: The flipping mechanism includes a flipping frame (20), an adjusting rod (15), an adjusting baffle (16), and a contour block (17). The flipping frame (20) is rotatably connected to the standing platform (4) and the column (2) of the support mechanism via the bearing (9). The adjusting rod (15) is fixed inside the flipping frame (20). The adjusting baffle (16) is adjusted and placed on the adjusting rod (15). The contour block (17) is fixed on the flipping frame (20).

7. The water-filling and tilting fixture for hydrostatic testing of a metal pressure-bearing shell according to claim 6, characterized in that: The adjusting rods (15) are arranged in multiple pairs and distributed at intervals along the length of the flipping frame (20). Each pair of adjusting rods (15) is symmetrically arranged on both sides of the flipping frame (20). The adjusting baffle (16) is adapted to be placed on any pair of adjusting rods (15) to adapt to metal pressure-bearing shells (19) of different lengths.

8. The water-filling tilting fixture for hydrostatic testing of a metal pressure-bearing shell according to claim 6, characterized in that: The contact surface of the contour block (17) is adapted to the outer contour of the metal pressure-bearing shell (19), and the contact surface is provided with anti-damage rubber strips.

9. The water-filling tilting fixture for hydrostatic testing of a metal pressure-bearing shell according to claim 6, characterized in that: The fixing mechanism is a fixing strap, with hooks at both ends. The strap is detachably connected to the flipping frame (20) via the hooks, and at least three fixing points are set along the length of the metal pressure-bearing shell (19), corresponding to the bottom, middle and top positions of the metal pressure-bearing shell (19) respectively.

10. A method for using a water-filling and tilting fixture for hydrostatic testing of a metal pressure-bearing shell, characterized in that, The water storage and tilting fixture according to any one of claims 1-9 includes the following steps: S1. By rotating the handwheel (7), the transmission mechanism is driven to rotate, causing the tilting frame (20) to tilt to a horizontal position, so that the tilting frame (20) and the limit rod (14) abut against each other and are limited. S2. Based on the length of the metal pressure shell (19) to be tested and the installation requirements of the water jacket cover, determine the placement position of the adjusting baffle (16) on the adjusting rod (15) and fix it in place, reserving space for the installation of the water jacket cover. S3. The metal pressure-bearing shell (19) is transported to the top of the tilting frame (20) by the hoisting equipment. The operator climbs onto the standing platform (4) and helps to place the metal pressure-bearing shell (19) stably on the tilting frame (20), so that the bottom of the metal pressure-bearing shell (19) abuts against the adjusting baffle (16) and the bottle body fits against the contour block (17). After removing the hoisting equipment straps, the metal pressure-bearing shell (19) is fixed to the tilting frame (20) by the fixing straps. S4. The operator slowly rotates the handwheel (7) to transmit power through the transmission mechanism, causing the tilting frame (20) and the metal pressure-bearing housing (19) fixed on it to slowly tilt until the tilting frame (20) and the lower stop bar (13) come into contact and limit the movement, and the metal pressure-bearing housing (19) is in a vertical state. S5. The operator inserts the large-diameter water injection pipe into the mouth of the vertical metal pressure-bearing shell on the standing platform (4), injects water into the metal pressure-bearing shell, observes the water level change, and closes the water injection valve when the metal pressure-bearing shell is about to be filled with water. S6. The water jacket cover is transported to the top of the bottle mouth of the metal pressure shell (19) by the hoisting equipment and slowly lowered. The operator assists in guiding it on the standing platform (4) so ​​that the bottle mouth of the metal pressure shell (19) is inserted into the opening of the water jacket cover. The water jacket cover is fixedly connected to the metal pressure shell (19) by bolts. S7. Release the fixing straps from the metal pressure-bearing shell (19), lift the metal pressure-bearing shell (19) with the water jacket cover connected by the hoisting equipment, move it above the water tank and slowly put it into the water tank for subsequent water pressure test.

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