A detachable support device for large-diameter, thin-walled pressure vessels

Abstract

This invention specifically relates to a detachable support device for large-diameter, thin-walled pressure vessels, belonging to the technical field of support tooling for pressure vessels. The invention utilizes the extension or retraction of the umbrella-rib hydraulic rod to pull the umbrella-rib adjusting sleeve forward or backward along the umbrella axis, compressing or releasing the umbrella-rib linkage rod and the umbrella-rib hydraulic rod. This causes the umbrella-rib linkage rod to change the support angle of the umbrella-rib hydraulic rod, achieving the effect of opening and retracting the umbrella ribs, thus enabling the recycling and reuse of the support tooling. After being supported by the outriggers to the circumferential seam of the cylinder head, continued pressure is applied, causing the flexible metal frame to retract into the limiting support. As the amount of retraction increases, the support effect strengthens. When the flexible metal frame is completely retracted into the limiting support, the limiting support provides support, achieving a gradual strengthening effect and avoiding the possibility of damage to the inner surface of the cylinder head caused by direct rigid support.

Description

Technical Field

[0001] This invention specifically relates to a detachable support device for large-diameter, thin-walled pressure vessels, belonging to the technical field of support tooling for pressure vessels. Background Technology

[0002] In the field of pressure vessel manufacturing, the welding quality of the head and the cylinder directly determines the overall strength and safety performance of the equipment. During the welding process, the high temperature heat input can easily cause stress concentration in the components, resulting in deformation problems such as excessive ellipticity and local dents in the head or cylinder. In severe cases, rework and repair are required, which greatly increases production costs and extends the production cycle.

[0003] Existing support fixtures are mainly rigid ring structures, which have several significant limitations: First, the fixtures require destructive disassembly. Before the end cap is connected to the cylinder, the rigid ring must be placed entirely into the cylinder. After welding, the fixture must be disassembled into multiple pieces to be removed from the equipment manhole. Damaged fixtures are difficult to recycle and reuse, resulting in material waste and further increasing production costs. Second, they have extremely poor versatility. The size and structure of rigid ring fixtures are fixed, requiring customization for pressure vessels of different diameters and wall thicknesses. This not only increases the cost of fixture preparation but also requires additional storage space, making management difficult. Third, the support effect is poor. The support position of traditional rigid rings must be deliberately avoided in the welding area to prevent obstruction of welding operations. This results in a certain distance between the support point and the weld, making it impossible to provide direct and effective support to the critical parts of the ring weld. This is especially unsuitable for high-efficiency welding scenarios of large-diameter, thin-walled pressure vessels. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to provide a support fixture for large-diameter, thin-walled pressure vessels that is non-destructive, highly versatile, provides precise support, and is easy to operate, thereby solving the problem of welding deformation between the pressure vessel head and the cylinder and reducing production costs.

[0005] To solve the above-mentioned technical problems, the technical solution proposed by the present invention is: a detachable support device for large-diameter, thin-walled pressure vessels, including a support shaft, umbrella rib support, support legs, umbrella top limiting clamp, manhole positioning support and umbrella handle clamp, wherein the support shaft is hollow inside and is equipped with an umbrella rib adjusting hydraulic rod; the outer surface of the support shaft is provided with symmetrical strip holes along the axial direction; The umbrella rib support is installed at one end of the support shaft via the umbrella top limiting clamp. The umbrella rib support includes a hydraulic support rib, an umbrella rib fixing sleeve, a rotating pin, an umbrella rib adjusting sleeve, an umbrella rib linkage rod, and a linkage pin. The rotating pin and the umbrella rib fixing sleeve are installed below the umbrella top limiting clamp to fix the hydraulic support rib to one end of the support shaft. The umbrella rib adjusting sleeve includes an umbrella rib adjusting sleeve section, an umbrella rib adjusting sleeve positioning ring, and an umbrella rib adjusting sleeve mating section. The axial outer side of the umbrella rib adjusting sleeve section and the telescopic end of the umbrella rib adjusting hydraulic rod are provided with pull lugs, which are connected by linkage bolts and linkage nuts passing through symmetrical strip holes on the outer surface of the support shaft. One side of the umbrella rib linkage rod is connected to the umbrella rib adjusting sleeve mating section via the umbrella rib adjusting sleeve positioning ring, and the other side is connected to the hydraulic support rib via the linkage pin. The outrigger is mounted on the telescopic end of the hydraulic support umbrella rib. The outrigger includes a roller shaft, a flexible metal frame, an outrigger shaft, and a limiting support. The limiting support is connected to the telescopic end of the hydraulic support umbrella rib. The flexible metal frame is connected to the limiting support via the outrigger shaft. The end of the flexible metal frame is connected to an outrigger roller via the roller shaft. The outrigger roller is covered with a roller rubber sleeve. The manhole positioning support is located on the side of the support shaft away from the umbrella rib support; the umbrella handle clamp is located on the other end of the support shaft away from the umbrella rib support; the umbrella handle clamp is provided with a mounting seat and a manhole adjusting hydraulic rod is installed on the mounting seat, the telescopic end of the manhole adjusting hydraulic rod is connected to the manhole positioning support, and the shaft diameter of the manhole positioning support increases or decreases under the drive of the manhole adjusting hydraulic rod.

[0006] Furthermore, the manhole positioning support includes at least two bushings, a positioning support limiting clamp, a female union connector, and a nut. One of the at least two bushings is fixed to the support shaft by the positioning support limiting clamp, and the remaining bushings are arranged sequentially on the support shaft facing the umbrella handle clamp. Each bushing includes a sleeve, a positioning ring, and a mating sleeve. The sleeve and the mating sleeve are axially slotted to allow the support shaft to pass through. The mating sleeve also has an annular groove, and the positioning ring is installed in the annular groove. Two support plates are symmetrically arranged on the positioning ring of the bushing. The two support plates on the at least two bushings are connected in pairs by connecting pins, so that all the bushings are connected as a whole.

[0007] The beneficial effects of this invention are as follows: 1. By extending or retracting the umbrella rib hydraulic rod, the umbrella rib adjusting bushing is pulled forward or backward along the umbrella axis, squeezing or releasing the umbrella rib linkage rod and the umbrella rib hydraulic rod, so that the umbrella rib linkage rod changes the support angle of the umbrella rib hydraulic rod, achieving the effect of opening and retracting the umbrella rib, thereby realizing the recycling and reuse of the support fixture; 2. After the support leg reaches the circumferential seam of the cylinder head, pressure is continued to be applied, causing the flexible metal frame to retract into the limiting support. As the amount of retraction increases, the support effect is enhanced. When the flexible metal frame is completely retracted into the limiting support, the limiting support plays a supporting role, achieving a gradual support enhancement effect, avoiding the possibility of damage to the inner surface of the cylinder head caused by direct hard support. 3. By supporting the weld seam with a flexible metal frame on both sides, when misalignment occurs, the lower-positioned flexible metal frame contracts inward more, providing stronger support and stronger resistance to welding shrinkage, resulting in less welding deformation; while the higher-positioned flexible metal frame contracts inward less, providing relatively weaker support and weaker resistance to welding shrinkage, resulting in greater welding deformation. This achieves the effect of adjusting and reducing misalignment by utilizing welding deformation. Attached Figure Description

[0008] Figure 1 This is an exploded view of the overall structure of the detachable support device in an embodiment of the present invention.

[0009] Figure 2 This is an exploded view of the manhole positioning support structure in an embodiment of the present invention.

[0010] Figure 3 This is an exploded schematic diagram of the umbrella rib support structure in an embodiment of the present invention.

[0011] Figure 4 This is an exploded schematic diagram of the umbrella rib adjusting bushing in an embodiment of the present invention.

[0012] Figure 5 This is an exploded view of the support leg in an embodiment of the present invention.

[0013] Figure 6 A schematic diagram illustrating the supporting effect of the detachable support device inside the container in an embodiment of the present invention. Detailed Implementation

[0014] The following description, in conjunction with specific embodiments and accompanying drawings, further illustrates a detachable support device for large-diameter, thin-walled pressure vessels according to the present invention. Example

[0015] The detachable support device in this embodiment, such as Figures 1 to 6As shown, it includes a support shaft 3, umbrella rib support 2, support leg 12, umbrella top limiting clamp 1, manhole positioning support 5 and umbrella handle clamp 8. The support shaft 3 is hollow inside and is equipped with an umbrella rib adjusting hydraulic rod 6. Symmetrical strip holes are opened on the outer surface of the support shaft 3 along the axial direction. The umbrella rib support 2 is installed at one end of the support shaft 3 via the umbrella top limiting clamp 1. The umbrella rib support 2 includes a hydraulic support rib 2-4, an umbrella rib fixing sleeve 2-6, a rotating pin 2-5, an umbrella rib adjusting sleeve 2-1, an umbrella rib linkage rod 2-2, and a linkage pin 2-3. The rotating pin 2-5 and the umbrella rib fixing sleeve 2-6 are installed below the umbrella top limiting clamp 1 to fix the hydraulic support rib 2-4 to one end of the support shaft 3. The umbrella rib adjusting sleeve 2-1 includes an umbrella rib adjusting sleeve section 2-1-1, an umbrella rib adjusting sleeve fixing section 2-2, and a linkage pin 2-3. Positioning ring 2-1-2 and umbrella rib adjusting bushing matching sleeve 2-1-3; the outer axial side of umbrella rib adjusting bushing matching sleeve 2-1-1 and the telescopic end of umbrella rib adjusting hydraulic rod 6 are provided with pull lugs, and are connected by linkage bolts 10 and linkage nuts 11 passing through symmetrical strip holes on the outer surface of support shaft 3; one side of umbrella rib linkage rod 2-2 is connected to umbrella rib adjusting bushing matching sleeve 2-1-3 through umbrella rib adjusting bushing positioning ring 2-1-2, and the other side is connected to hydraulic support umbrella rib 2-4 through linkage pin 2-3.

[0016] The outrigger 12 is mounted on the telescopic end of the hydraulically supported umbrella rib 2-4. The outrigger 12 includes a roller shaft 12-1, a flexible metal frame 12-4, an outrigger shaft 12-5, and a limiting support 12-6. The limiting support 12-6 is connected to the telescopic end of the hydraulically supported umbrella rib 2-4. The flexible metal frame 12-4 is connected to the limiting support 12-6 through the outrigger shaft 12-5. The end of the flexible metal frame 12-4 is connected to an outrigger roller 12-3 through the roller shaft 12-1. The outrigger roller 12-3 is covered with a roller rubber 12-2.

[0017] The manhole positioning support 5 is located on the side of the support shaft 3 away from the umbrella rib support 2; the umbrella handle clamp 8 is located on the other end of the support shaft 3 away from the umbrella rib support 2; the umbrella handle clamp 8 is provided with a mounting seat 7 and a manhole adjusting hydraulic rod 9 is installed on the mounting seat 7. The telescopic end of the manhole adjusting hydraulic rod 9 is connected to the manhole positioning support 5, so that the shaft diameter of the manhole positioning support 5 increases or decreases under the drive of the manhole adjusting hydraulic rod.

[0018] The manhole positioning support 5 includes at least two bushings, a positioning support limiting clamp 4, a union female head 5-1, and a union nut 5-2; one of the at least two bushings is fixed to the support shaft 3 by the positioning support limiting clamp 4, and the remaining bushings are arranged sequentially on the support shaft 3 towards the umbrella handle clamp 8; the bushing includes a sleeve 5-3, a positioning ring 5-4, and a mating sleeve 5-7, the sleeve 5-3 and the mating sleeve 5-7 are slotted axially to allow the support shaft 3 to pass through, the mating sleeve 5-7 is also provided with an annular groove, and the positioning ring 5-4 is installed in the annular groove; two support plates 5-6 are symmetrically arranged on the positioning ring 5-4 of the bushing, and the two support plates 5-6 on the at least two bushings are connected in pairs by connecting pins 5-5, so that all the bushings are connected as a whole.

[0019] The detachable support device in this embodiment is used as follows: In use, insert the detachable support device into the container through the manhole, place the manhole positioning support 5 inside the manhole, and extend the manhole positioning adjustment hydraulic rod 9 to tighten the manhole positioning support 5. The external dimensions of the manhole positioning support 5 increase, and it remains firmly supported inside the manhole as the manhole positioning adjustment hydraulic rod 9 continues to extend. At this time, the position of the support shaft 3 coincides with the center line of the container. Activate the umbrella rib adjustment hydraulic rod 6, and the umbrella rib adjustment sleeve 2-1 moves upward along the support shaft 3 as the umbrella rib adjustment hydraulic rod 6 extends, driving the umbrella rib linkage rod 2-2. The hydraulic support ribs 2-4 are raised. After being fully raised, the hydraulic support ribs 2-4 extend until the outriggers 12 support the circumferential seam of the cylinder head. Pressurization continues, and the flexible metal frame 12-4 retracts into the limiting support 12-6. As the amount of retraction increases, the support effect is enhanced. When the flexible metal frame 12-4 is fully retracted into the limiting support 12-6, the limiting support 12-6 plays a supporting role. During the process, a gradual support enhancement effect is provided, avoiding the possibility of damage to the inner surface of the cylinder head caused by direct hard support. Meanwhile, the structure of the flexible metal frame 12-4 can effectively address the misalignment problem during the assembly of the head cylinder. The roller supports on both sides of the weld (composed of roller shaft 12-1, roller rubber 12-2, and support leg roller 12-3) are relatively independent. When misalignment occurs, the lower-position flexible metal frame 12-4 contracts inward more, providing stronger support and stronger resistance during welding contraction, resulting in less welding deformation. Conversely, the higher-position flexible metal frame 12-4 contracts inward less, providing relatively weaker support and weaker resistance during welding contraction, resulting in greater welding deformation. This allows the invention to achieve the effect of adjusting and reducing misalignment by utilizing welding deformation.

[0020] During recycling, first retract the hydraulic support umbrella ribs 2-4. Then, as the umbrella rib adjusting sleeve 2-1 shortens along the support shaft 3 to the bottom, it drives the umbrella rib linkage rod 2-2 to retract the hydraulic support umbrella ribs 2-4. The manhole positioning adjusting hydraulic rod 9 shortens, and the manhole positioning support 5 is released. At this time, the umbrella support can be removed from the container for the next use.

[0021] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention. These embodiments are only intended to aid in understanding the method and core ideas of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A detachable support device for large-diameter, thin-walled pressure vessels, characterized in that: It includes a support shaft, umbrella rib support, outriggers, umbrella top limiting clamp, manhole positioning support, and umbrella handle clamp. The support shaft is hollow inside and is equipped with an umbrella rib adjusting hydraulic rod. The outer surface of the support shaft has symmetrical strip holes along the axial direction. The umbrella rib support is installed at one end of the support shaft via the umbrella top limiting clamp. The umbrella rib support includes a hydraulic support rib, an umbrella rib fixing sleeve, a rotating pin, an umbrella rib adjusting sleeve, an umbrella rib linkage rod, and a linkage pin. The rotating pin and the umbrella rib fixing sleeve are installed below the umbrella top limiting clamp to fix the hydraulic support rib to one end of the support shaft. The umbrella rib adjusting sleeve includes an umbrella rib adjusting sleeve section, an umbrella rib adjusting sleeve positioning ring, and an umbrella rib adjusting sleeve mating section. The axial outer side of the umbrella rib adjusting sleeve section and the telescopic end of the umbrella rib adjusting hydraulic rod are provided with pull lugs, which are connected by linkage bolts and linkage nuts passing through symmetrical strip holes on the outer surface of the support shaft. One side of the umbrella rib linkage rod is connected to the umbrella rib adjusting sleeve mating section via the umbrella rib adjusting sleeve positioning ring, and the other side is connected to the hydraulic support rib via the linkage pin. The outrigger is mounted on the telescopic end of the hydraulic support umbrella rib. The outrigger includes a roller shaft, a flexible metal frame, an outrigger shaft, and a limiting support. The limiting support is connected to the telescopic end of the hydraulic support umbrella rib. The flexible metal frame is connected to the limiting support via the outrigger shaft. The end of the flexible metal frame is connected to an outrigger roller via the roller shaft. The outrigger roller is covered with a roller rubber sleeve. The manhole positioning support is located on the side of the support shaft away from the umbrella rib support; the umbrella handle clamp is located on the other end of the support shaft away from the umbrella rib support; the umbrella handle clamp is provided with a mounting seat and a manhole adjusting hydraulic rod is installed on the mounting seat, the telescopic end of the manhole adjusting hydraulic rod is connected to the manhole positioning support, and the shaft diameter of the manhole positioning support increases or decreases under the drive of the manhole adjusting hydraulic rod.

2. The detachable support device according to claim 1, characterized in that: The manhole positioning support includes at least two bushings, a positioning support limiting clamp, a female connector, and a nut. One of the at least two bushings is fixed to the support shaft by the positioning support limiting clamp, and the remaining bushings are arranged sequentially on the support shaft facing the umbrella handle clamp. Each bushing includes a sleeve, a positioning ring, and a mating sleeve. The sleeve and the mating sleeve are axially slotted to allow the support shaft to pass through. The mating sleeve also has an annular groove, and the positioning ring is installed in the annular groove. Two support plates are symmetrically arranged on the positioning ring of the bushing. The two support plates on the at least two bushings are connected in pairs by connecting pins, so that all the bushings are connected as a whole.

Images