Turnover lifting device for water pressure test of composite gas cylinder

Abstract

The utility model relates to hydrogen storage pressure vessel test technology, aims at providing a kind of composite gas cylinder water pressure test is used to overturn lifting device.The device includes: bearing plate car, vertical support frame, transverse pulley assembly, gas cylinder overturning frame, steel rope group and winch;Wherein, vertical support frame fixed mounting is in the one end of bearing plate car, the head of gas cylinder overturning frame is located with the opposite another end, tail portion is pivotally installed in the middle part of bearing plate car;The one end of transverse pulley assembly is connected with vertical support frame top, the other end extends to the above of gas cylinder overturning frame transversely, is equipped with fixed pulley in two ends respectively and is equipped with movable pulley that can move transversely in middle part.The device realizes overturning using winch traction gas cylinder overturning frame, and movable pulley moves along with the direction of steel rope, so that steel rope and it keep perpendicular basically.Gas cylinder is not directly stressed to avoid the damage of gas cylinder outer surface caused by conventional hoisting, and gas cylinder is controlled as a whole in overturning process, so that the equipment requirement of winch is reduced.

Description

Technical Field

[0001] This utility model relates to hydrogen storage pressure vessel testing technology, specifically to a device for injecting water for hydrostatic testing of large-capacity gas cylinders. Background Technology

[0002] Carbon fiber fully wound composite hydrogen storage cylinders (hereinafter referred to as hydrogen storage cylinders) are important on-board hydrogen storage pressure vessels. Pressure testing of hydrogen storage cylinders to verify their strength is of great significance for verifying their safety and improving design quality. Pressure testing requires introducing fluid into the hydrogen storage cylinder. Because gases are highly compressible, if the cylinder fails, the energy of the compressed gas will be released rapidly, posing a high risk. Furthermore, pressure testing often uses air injection to achieve pressurization; the presence of a large amount of compressible gas inside the cylinder leads to slow pressurization, affecting test efficiency. Water, on the other hand, is considered an incompressible fluid at room temperature; its energy release is relatively slow in the event of cylinder failure, and it facilitates rapid pressurization. Therefore, hydrostatic testing is the primary method for hydrogen storage cylinder pressure testing.

[0003] According to the national standard for Type III / IV hydrogen storage cylinders, hydrogen storage cylinders must undergo hydrostatic testing, hydrostatic burst testing, and pressure cycling testing during the design and manufacturing process to verify their strength. Since the inlet and outlet of the hydrogen storage cylinder are located on its central axis, to fill it with water, the tail end must be sealed and the cylinder placed almost vertically, with water poured in from the top. However, due to the cylinder's large weight and smooth surface, it is difficult for operators to find a point of leverage, posing a safety hazard during the tilting and lifting process. For the non-burst hydrostatic test, the cylinder must be laid down after the test to drain the water. Taking a hydrogen storage cylinder with an inner diameter of 372 mm, a nominal volume of 100 L, and a nominal pressure of 35 MPa as an example, the cylinder weighs approximately 70 kg, and approximately 170 kg when filled with water, requiring multiple operators to work together to complete the water filling and draining operations. Furthermore, the national standard GB / T 35544 only requires the nominal outer diameter of hydrogen storage cylinders to be 180-660 mm, and does not impose strict requirements on the length. Therefore, the nominal outer diameter of different cylinders may vary considerably. Even when using conventional hoisting equipment, specific installation and disassembly work is required before and after hoisting, which not only increases the workload of experimental personnel but also makes the hoisting process itself prone to various accidents.

[0004] Based on this, this utility model proposes a newly designed overturning and lifting device for hydrostatic testing of composite gas cylinders. This device is suitable for hydrogen storage cylinders with large mass, different diameters and lengths, and can improve the efficiency of hydrogen storage cylinder pressure testing. Utility Model Content

[0005] The problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a flipping and lifting device for hydrostatic testing of composite gas cylinders.

[0006] To solve the problems of the existing technology, the technical solution adopted by this utility model is as follows:

[0007] A tilting and lifting device for hydrostatic testing of composite gas cylinders is provided, comprising: a load-bearing trolley, a vertical support frame, a horizontal pulley assembly, a gas cylinder tilting frame, a steel rope assembly, and a winch; wherein,

[0008] The gas cylinder tilting frame is long and cage-like, consisting of a lower gas cylinder support and an upper enclosure structure;

[0009] The vertical support frame is fixedly installed at one end of the load-bearing flatbed cart, and the head of the gas cylinder tipping frame is located at the other end of the load-bearing flatbed cart opposite to the vertical support frame; two second support columns are provided in the middle of the load-bearing flatbed cart, and the tail of the gas cylinder tipping frame is pivotally installed on the top of the second support columns; the winch is fixedly installed on the load-bearing flatbed cart.

[0010] The main body of the transverse pulley assembly is long and narrow, with one end fixedly connected to the top of the vertical support frame and the other end extending laterally to the top of the gas cylinder tilting frame. Fixed pulleys are provided at both ends of the transverse pulley assembly, and a movable pulley that can move laterally is provided in the middle. A steel rope assembly is installed between the fixed pulley and the movable pulley, with one end of the steel rope connected to a winch and the other end connected to the top of the gas cylinder tilting frame.

[0011] The distance between the transverse pulley assembly and the second support column is greater than the vertical height of the test gas cylinder. When the winch drives the steel rope to move, the steel rope pulls the gas cylinder tilting frame to tilt around the pivot at the top of the second support column. During this process, the movable pulley moves in the direction of the steel rope, so that the steel rope between the movable pulley and the gas cylinder tilting frame is basically perpendicular to the axis of the gas cylinder tilting frame.

[0012] As an improvement, the gas cylinder support is U-shaped and is formed by the intersection of multiple strip-shaped longitudinal beams and multiple arc-shaped circumferential beams; the enclosure structure includes a limiting frame at the tail of the gas cylinder support, multiple belts spaced apart on the gas cylinder support, and a traction frame at the head of the gas cylinder support; the steel rope is connected to the traction frame.

[0013] As an improvement, several rollers are arranged alternately on each circumferential beam, with the rollers on each circumferential beam arranged symmetrically with respect to the central axis of the gas cylinder support; the rollers are fixed to the circumferential beam by bushings, and the rotation direction of each roller is perpendicular to the circumferential beam at its position.

[0014] As an improvement, the limiting frame includes a limiting baffle, a limiting frame, and fastening bolts; the limiting frame includes a base plate and two side plates, which are disposed opposite to each other at both ends of the base plate, and vertical grooves are respectively provided on the inner surface; the limiting baffle is movably inserted into the vertical grooves on both sides and is positioned by fastening bolts installed through the side plates.

[0015] As an improvement, the longitudinal beams at the uppermost edge on both sides of the gas cylinder support are used as mounting beams. Multiple hinge shafts are alternately arranged on one mounting beam, and multiple buckles are alternately arranged on the other mounting beam. One end of each belt is connected to the hinge shaft, and the other end is connected to the buckle.

[0016] As an improvement, the traction frame is arc-shaped, with one end connected to a lug plate on the longitudinal beam via a hinge shaft, and the other end connected to another lug plate on the opposite side via a detachable bolt; a clasp for fixing the steel rope is provided at the highest point in the middle of the traction frame; two first support columns are provided on the load-bearing plate car, with rubber buffer pads at their top ends, and the two lug plates are respectively placed on the rubber buffer pads.

[0017] As an improvement, the vertical support frame includes two diagonal support beams connected at their top ends, with their bottom ends fixed to the load-bearing trolley; a foam cushioning pad is provided in the middle of the vertical support frame; and diagonally arranged ribs are provided between the vertical support frame and the transverse pulley assembly, with the two ends of the ribs fixedly connected to form a stable support structure.

[0018] As an improvement, the main body of the transverse pulley assembly is a pulley frame with a double-layer clamping plate structure, and a groove is provided along the length of its waist, in which the axle of the movable pulley is installed.

[0019] As an improvement, the winch is located below the vertical support frame; a caster wheel is installed at each of the four corners of the bottom of the load-bearing trolley.

[0020] As an improvement, at the connection point between the transverse pulley assembly and the vertical support frame, two coaxially arranged first and second fixed pulleys are provided, and a third fixed pulley is provided at the other end of the transverse pulley assembly; the steel rope group includes a main rope and a secondary rope; one end of the main rope is connected to the winch, and its middle part passes over the first fixed pulley and the movable pulley from the top edge, and the other end is connected to the gas cylinder tipping frame; one end of the secondary rope is bound to and wound around the second fixed pulley, and its middle part passes over the movable pulley and the third fixed pulley from the bottom edge, and the other end is bound to the axle of the movable pulley.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. The gas cylinder tilting frame of this utility model has a wheel assembly on its circumferential beam, which facilitates the horizontal pushing or pushing of gas cylinders into or out of the tilting frame, reducing the force required for horizontal movement of the gas cylinders. In addition, a limiting frame located at the tail of the gas cylinder tilting frame can support the gas cylinders. The limiting frame can move within a vertical groove, thereby adjusting the tail support part according to the outer diameter of the gas cylinder.

[0023] 2. This utility model connects the gas cylinder tilting frame to a steel rope via a traction frame at the front end, allowing gas cylinders longer than the tilting frame to be placed. The cooperation between the belt and the circumferential beam enables the binding of gas cylinders with a wide range of radial dimensions. Therefore, this utility model is applicable to gas cylinders of various diameters and lengths. Furthermore, the device uses the rotating tilting frame to upright the gas cylinders, preventing the cylinders from being directly subjected to force and avoiding pressure test errors caused by damage to the outer surface of the gas cylinders due to conventional hoisting methods.

[0024] 3. This invention incorporates multiple pulleys in the transverse pulley assembly, working in conjunction with a main rope and auxiliary rope. This ensures that, under traction, the tension of the main rope on the gas cylinder tilting frame is nearly perpendicular to the central axis of the gas cylinder, providing maximum torque under the same tension. Therefore, this device reduces the equipment requirements for the winch, further lowering costs.

[0025] 4. During the use of the device, the gas cylinder is securely tied to the gas cylinder tilting frame, preventing any loosening accidents during hoisting; during traction, the hinge shaft serves as the rotation center, and the rope group, which is limited in the vertical support frame, ensures that the gas cylinder is under overall control during the tilting process, preventing any swaying or overturning dangers. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the flipping and lifting device in this utility model.

[0027] Figure 2 This is a side view of the tilting and lifting device.

[0028] Figure 3 This is a schematic diagram of the gas cylinder tilting frame.

[0029] Figure 4 This is a structural diagram of the limit frame.

[0030] Figure 5 This is a schematic diagram of the horizontal pulley assembly.

[0031] The attached diagram labels are as follows: 1. Load-bearing trolley; 2. Gas cylinder tipping frame; 3. Vertical support frame; 4. Horizontal pulley assembly; 5. Winch; 6. Caster wheel; 7. Foam cushioning pad; 8. Main rope; 9. Diagonal support beam; 10. Rib plate; 11. First fixed pulley; 12. Second fixed pulley; 13. Pulley frame; 14. Slide groove; 15. Movable pulley; 16. Third fixed pulley; 17. Secondary rope; 18. First support column; 19. Second support column; 20. Left ear plate; 21. First hinge shaft; 22. Belt; 23. Circumferential beam; 24. Roller; 25. Longitudinal beam; 26. Belt; 27. Buckle; 28. Ring; 29. ​​Traction frame; 30. Right ear plate; 31. Bolt; 32. Second hinge shaft; 33. Rubber cushioning pad; 34. Limiting frame; 35. Limiting frame; 36. Limiting baffle; 37. Fastening bolt; 38. Vertical slide groove; 39. Gas cylinder; 40. Rope buckle. Detailed Implementation

[0032] To more thoroughly illustrate the purpose, technical solution, and advantages of this utility model, the following detailed description is provided in conjunction with the embodiments and accompanying drawings:

[0033] In the description of this utility model, the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] Part 1: Overview of the Implementation Scheme of this Utility Model

[0035] The composite material gas cylinder hydrostatic testing tilting and lifting device of this utility model includes the following main components: a load-bearing trolley, a vertical support frame, a horizontal pulley assembly, a gas cylinder tilting frame, a steel rope assembly, and a winch. The load-bearing trolley is the load-bearing component of the entire device, and the vertical support frame, gas cylinder tilting frame, and winch are all directly mounted on it. A caster wheel is installed at each of the four corners of its bottom.

[0036] The gas cylinder tipping frame is a long cage-like structure, consisting of a lower gas cylinder support and an upper enclosure.

[0037] The gas cylinder support is U-shaped, composed of multiple longitudinal beams and multiple circumferential beams. Several rollers are arranged alternately on each circumferential beam, symmetrically arranged with respect to the central axis of the support. The rollers are fixed to the circumferential beams by bushings, and the rotation direction of each roller is perpendicular to the circumferential beam at its location. Two first support columns are mounted on the load-bearing trolley, with rubber cushioning pads at their tops. Ear plates are located at the ends of the two outermost longitudinal beams of the gas cylinder support, each resting on the rubber cushioning pad. Two second support columns are located in the middle of the load-bearing trolley, and the tail of the gas cylinder tipping frame is pivotally mounted on the top of these second support columns via a hinge shaft or other means.

[0038] The enclosure structure includes a limiting frame at the rear of the gas cylinder support, multiple belts spaced apart on the gas cylinder support, and a traction frame at the front of the gas cylinder support. The limiting frame includes a limiting baffle, a limiting frame, and fastening bolts; the limiting frame includes a base plate and two side plates, the two side plates being positioned opposite each other at both ends of the base plate, and each having a vertical groove on its inner surface; the limiting baffle is movably inserted into the vertical grooves on both sides and positioned by fastening bolts that pass through and are mounted on the side plates. The longitudinal beams at the uppermost edges of both sides of the gas cylinder support serve as mounting beams, with multiple hinge shafts spaced alternately on one mounting beam and multiple buckles spaced alternately on the other mounting beam; one end of each belt is connected to a hinge shaft, and the other end is connected to a buckle. The traction frame is arc-shaped, with one end connected to the ear plate on the longitudinal beam via a hinge shaft, and the other end connected to another ear plate on the opposite side via a detachable bolt; a retaining ring for fixing the steel rope is provided at the highest point in the middle of the traction frame, and the end of the steel rope is tied to the retaining ring.

[0039] A vertical support frame is fixedly installed at one end of the load-bearing flatbed truck, and the head of the gas cylinder tipping frame is located at the other end of the load-bearing flatbed truck opposite the vertical support frame. The vertical support frame includes two diagonal support beams connected at their top ends, with their bottom ends fixed to the load-bearing flatbed truck. A foam cushioning pad is provided in the middle of the vertical support frame, and diagonally arranged ribs are provided between the vertical support frame and the transverse pulley assembly, with both ends of the ribs fixedly connected to form a stable support structure. The winch is located below the vertical support frame.

[0040] The main body of the transverse pulley assembly is elongated, exemplarily a double-layered clamping plate structure pulley frame, with the distance between it and the second support column greater than the vertical height of the test gas cylinder. A groove is provided along the length of the transverse pulley assembly at its waist, and the axle of the movable pulley is installed in the groove. One end of the transverse pulley assembly is fixedly connected to the top of the vertical support frame, and the other end extends laterally to above the head of the gas cylinder tilting frame. Fixed pulleys are provided at both ends of the transverse pulley assembly, and a movable pulley capable of lateral movement is provided in its middle. Specifically, at the connection point between the transverse pulley assembly and the vertical support frame, two coaxially arranged first and second fixed pulleys are provided, and a third fixed pulley is provided at the other end of the transverse pulley assembly.

[0041] A steel rope assembly, including a main rope and an auxiliary rope, is installed between the fixed pulley and the movable pulley. One end of the main rope is connected to a winch, and its middle section passes over the first fixed pulley and the movable pulley from the top, with the other end connected to the traction frame of the gas cylinder tipping frame. One end of the auxiliary rope is tied to and wound around the second fixed pulley, and its middle section passes over the movable pulley and the third fixed pulley from the bottom, with the other end tied to the axle of the movable pulley. When the winch moves the steel rope, the steel rope pulls the gas cylinder tipping frame to tilt around the pivot at the top of the second support column; during this process, the movable pulley moves in the direction of the steel rope, ensuring that the steel rope between the movable pulley and the gas cylinder tipping frame remains substantially perpendicular to the axis of the gas cylinder tipping frame.

[0042] Part Two: Specific Examples and Usage Instructions

[0043] 1. Description of the device structure in the example

[0044] like Figure 1 , 2 As shown, the composite material gas cylinder hydrostatic testing tilting and lifting device provided by this utility model includes a load-bearing trolley 1, a gas cylinder tilting frame 2, a vertical support frame 3, a horizontal pulley assembly 4, and a winch 5. The vertical support frame 3 includes an inclined support beam 9, with a foam cushioning pad 7 installed in its middle to prevent accidental tipping and damage to the winch 5 when the gas cylinder is upright. The vertical support frame 3 and the horizontal pulley assembly 4 are fixed by rib plates 10 to prevent the latter from being damaged by force.

[0045] like Figure 3As shown, the gas cylinder tilting frame 2 includes a gas cylinder support and an enclosure structure. The gas cylinder support supports the gas cylinder 39 and includes multiple circumferential beams 23 and longitudinal beams 25 arranged in a cross pattern. Rollers 24 on the circumferential beams 23 are symmetrically arranged with respect to the central axis of the gas cylinder support, and the end face of each roller is perpendicular to the circumferential beam 23 and cannot move along the circumferential beam 23. This design reduces the frictional force when the gas cylinder 39 slides axially, making it easier to move the gas cylinder 39 into or out of the gas cylinder support. A hinge shaft is provided on the uppermost longitudinal beam 25, and a buckle 27 is provided on the other longitudinal beam 25, for installing and fixing the belt 22, respectively. The belt 22 is used to radially constrain the gas cylinder 39 to prevent it from tipping over when upright. The tail end of the gas cylinder support is pivotally mounted on a second support column 19, specifically with a first hinge shaft 21 at the top of the latter. The side of the first hinge shaft 21 is fixed to the longitudinal beam 25, and the gas cylinder support can rotate around the first hinge shaft 21. The gas cylinder support has an arc-shaped traction frame 29 at its front end, with a retaining ring 27 in its middle. One end of the traction frame 29 is fixed to the left ear plate 20 via a second hinge shaft 32, and the other end is connected to the right ear plate 30 via a detachable bolt 31. The traction frame 29 is used to connect the main rope 8. After loosening the bolt 31, the traction frame 29 can rotate and open around the second hinge shaft 32, facilitating the insertion of the gas cylinder 39 from above the gas cylinder tilting frame 2. When the gas cylinder tilting frame 2 is placed horizontally, the left ear plate 20 and the right ear plate 30 press against the first support column 18, which supports the gas cylinder tilting frame 2. A rubber buffer pad 33 is provided at the top of the first support column 18 to reduce damage caused by contact between the first support column 18 and the ear plate.

[0046] like Figure 4 As shown, the limiting frame 34 includes a limiting baffle 36, a limiting frame 35, and a fastening bolt 37. The limiting baffle 36 has threaded holes on its side. Screwing the fastening bolt 37 into the threaded holes presses the limiting frame 35, thereby fixing the position of the limiting baffle 36. The limiting frame 35 has a pair of vertical sliding grooves 38 on its side, allowing the limiting baffle 36 to move within these grooves. Loosening the fastening bolt 37 allows the limiting baffle 36 to slide up and down. Figure 5 The solid line position shown is moved to the dashed line position.

[0047] like Figure 2 , 5As shown, the main body of the transverse pulley assembly 4 is a horizontally arranged pulley frame 13, in which the first fixed pulley 11, the second fixed pulley 12, the third fixed pulley 16, and the movable pulley 15 are all installed. The first fixed pulley 11 and the second fixed pulley 12 are coaxial and located at one end connected to the vertical support frame 3, the third fixed pulley 16 is located at the other end, and the movable pulley 15 is located in the groove 14 of the pulley frame 13. The steel rope assembly includes a main rope 8 and a secondary rope 17. One end of the main rope 8 is connected to the winch 5, and after passing over the first fixed pulley 11 and the movable pulley 15, its other end is connected to the retaining ring 28 of the traction frame 29 in the gas cylinder tilting frame 2, forming a rope buckle 40 for fixing. One end of the secondary rope 17 is tied to the axle of the movable pulley 15, and after passing over the third fixed pulley 16, its other end is fixed and wound around the second fixed pulley 12.

[0048] 2. Instructions for using the example device

[0049] In use, first loosen the rope buckle 40, then loosen the bolt 31, and rotate the traction frame 29 around the second hinge axis 32 to open it. Place the gas cylinder 39 into the gas cylinder tilting frame 2, loosen the fastening bolt 37 to adjust the upper and lower positions of the limit baffle 36, ensuring that the limit baffle 36 can provide proper support for the gas cylinder 39. Connect the belt 22 to the buckle 27, then close the traction frame 29 and tighten the bolt 31. Move the movable pulley 15 to the front end of the slide groove 14, and then connect the main rope 8 to the retaining ring 27. Start the winch 5 and control the winch 5 to rotate forward. The main rope 8 tightens, the gas cylinder tilting frame 2 rotates around the first hinge axis 21, and at the same time, the auxiliary rope 17 is gradually released, and the first fixed pulley 11 slides along the slide groove 14 towards the tail end of the pulley frame 13.

[0050] The specific operation of the transverse pulley assembly 4 is explained in more detail below: When the winch 5 tightens the main rope 8 in a forward rotation, the movement of the main rope 8 causes the first fixed pulley 11 to rotate. Since the first fixed pulley 11 and the second fixed pulley 12 are coaxial, the second fixed pulley 12 rotates accordingly, and the auxiliary rope 17 wound on the second fixed pulley 12 is gradually released, increasing the length of the unwound section of the auxiliary rope 17. Because the axes of the second fixed pulley 12 and the third fixed pulley 16 are immovable, and the movable pulley 15 is subjected to the pressure of the main rope 8, it tends to move towards the tail end of the pulley frame 13; the increased length of the unwound section of the auxiliary rope 17 allows the movable pulley 15 to move one distance along the horizontal groove. As the length of the unwound section of the auxiliary rope 17 increases, the movable pulley 15 gradually slides to the tail end of the pulley frame 13. Based on the operation mode brought about by the specific design of the transverse pulley assembly 4, the tension of the main rope 8 on the gas cylinder tilting frame 2 is almost perpendicular to the central axis of the gas cylinder 39, providing the maximum torque under the same tension.

[0051] When the gas cylinder is tilted to the vertical position, turn off the winch 5. At this time, the gas cylinder 39 is upright and water filling can be performed. If it is necessary to remove the gas cylinder 39 after water filling, tighten the gas cylinder valve, start the winch 5 and control the winch 5 to reverse, the main rope 8 is gradually released, and under the influence of the gas cylinder 39's own weight, the gas cylinder tilting frame 2 rotates around the first hinge axis 21; the auxiliary rope 17 is gradually tightened, and the first fixed pulley 11 slides along the slide groove 14 towards the front end of the pulley frame 13. When the gas cylinder tilting frame 2 reaches the horizontal position, the left ear plate 20 and the right ear plate 30 contact the rubber buffer pad 33. At this time, turn off the winch 5, then release the buckle 27 and rope buckle 40, loosen the bolt 31, open the traction frame 29, and push the gas cylinder 39 out of the gas cylinder tilting frame 2.

[0052] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the substantive content of this utility model.

Claims

1. A tilting and lifting device for hydrostatic testing of composite gas cylinders, characterized in that, include: Load-bearing flatbed cart, vertical support frame, horizontal pulley assembly, gas cylinder tilting frame, steel rope assembly, and winch; among which, The gas cylinder tilting frame is long and cage-like, consisting of a lower gas cylinder support and an upper enclosure structure; The vertical support frame is fixedly installed at one end of the load-bearing flatbed cart, and the head of the gas cylinder tipping frame is located at the other end of the load-bearing flatbed cart opposite to the vertical support frame; two second support columns are provided in the middle of the load-bearing flatbed cart, and the tail of the gas cylinder tipping frame is pivotally installed on the top of the second support columns; the winch is fixedly installed on the load-bearing flatbed cart. The main body of the transverse pulley assembly is long and narrow, with one end fixedly connected to the top of the vertical support frame and the other end extending laterally to the top of the gas cylinder tilting frame. Fixed pulleys are provided at both ends of the transverse pulley assembly, and a movable pulley that can move laterally is provided in the middle. A steel rope assembly is installed between the fixed pulley and the movable pulley, with one end of the steel rope connected to a winch and the other end connected to the top of the gas cylinder tilting frame. The distance between the transverse pulley assembly and the second support column is greater than the vertical height of the test gas cylinder. When the winch drives the steel rope to move, the steel rope pulls the gas cylinder tilting frame to tilt around the pivot at the top of the second support column. During this process, the movable pulley moves in the direction of the steel rope, so that the steel rope between the movable pulley and the gas cylinder tilting frame is basically perpendicular to the axis of the gas cylinder tilting frame.

2. The apparatus according to claim 1, characterized in that, The gas cylinder support is U-shaped and is formed by the intersection of multiple strip-shaped longitudinal beams and multiple arc-shaped circumferential beams; the enclosure structure includes a limiting frame at the tail of the gas cylinder support, multiple belts spaced apart on the gas cylinder support, and a traction frame at the head of the gas cylinder support; the steel rope is connected to the traction frame.

3. The apparatus according to claim 2, characterized in that, Several rollers are arranged alternately on each circumferential beam, with the rollers on each circumferential beam arranged symmetrically with respect to the central axis of the gas cylinder support; the rollers are fixed to the circumferential beam by bushings, and the rotation direction of each roller is perpendicular to the circumferential beam at its position.

4. The apparatus according to claim 2, characterized in that, The limiting frame includes a limiting baffle, a limiting frame, and fastening bolts; the limiting frame includes a base plate and two side plates, which are disposed opposite to each other at both ends of the base plate, and vertical grooves are respectively provided on the inner surface; the two sides of the limiting baffle are movably inserted into the vertical grooves and are positioned by fastening bolts installed through the side plates.

5. The apparatus according to claim 2, characterized in that, The longitudinal beams at the uppermost edge on both sides of the gas cylinder support are used as mounting beams. Multiple hinge shafts are alternately arranged on one mounting beam, and multiple buckles are alternately arranged on the other mounting beam. One end of each belt is connected to the hinge shaft, and the other end is connected to the buckle.

6. The apparatus according to claim 2, characterized in that, The traction frame is arc-shaped, with one end connected to a lug plate on a longitudinal beam via a hinge shaft, and the other end connected to another lug plate on the opposite side via a detachable bolt; a clasp for fixing the steel rope is provided at the highest point in the middle of the traction frame; two first support columns are provided on the load-bearing plate, with rubber buffer pads at their top ends, and the two lug plates are respectively placed on the rubber buffer pads.

7. The apparatus according to claim 1, characterized in that, The vertical support frame includes two inclined support beams connected at their top ends, with their bottom ends fixed to the load-bearing trolley; a foam cushioning pad is provided in the middle of the vertical support frame, and an inclined rib is provided between the vertical support frame and the transverse pulley assembly, with the two ends of the rib fixedly connected to form a stable support structure.

8. The apparatus according to claim 1, characterized in that, The main body of the transverse pulley assembly is a pulley frame with a double-layer clamping plate structure. A groove is provided along the length of its waist, and the axle of the movable pulley is installed in the groove.

9. The apparatus according to claim 1, characterized in that, The winch is located below the vertical support frame; a caster wheel is installed at each of the four corners of the bottom of the load-bearing trolley.

10. The apparatus according to any one of claims 1 to 9, characterized in that, At the connection point between the transverse pulley assembly and the vertical support frame, there are two coaxially arranged first and second fixed pulleys, and a third fixed pulley is provided at the other end of the transverse pulley assembly; the steel rope group includes a main rope and a secondary rope; one end of the main rope is connected to the winch, and its middle part passes over the first fixed pulley and the movable pulley from the top edge, and the other end is connected to the gas cylinder tipping frame; one end of the secondary rope is bound to and wound around the second fixed pulley, and its middle part passes over the movable pulley and the third fixed pulley from the bottom edge, and the other end is bound to the axle of the movable pulley.

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