Detachable supporting device for large-diameter and thin-wall pressure vessel

Abstract

The invention particularly relates to a detachable supporting device for a large-diameter and thin-wall pressure container, and belongs to the technical field of supporting tools for pressure containers. The umbrella rib hydraulic rod extends or retracts, the umbrella rib adjusting shaft sleeve is pulled to move forwards or backwards along the umbrella shaft, and the umbrella rib linkage rod and the umbrella rib hydraulic rod are extruded or released, so that the umbrella rib linkage rod changes the supporting angle of the umbrella rib hydraulic rod, the effect of opening and storing the umbrella ribs is achieved, and recycling of the supporting tool is achieved; after the supporting legs are supported to the position of a cylinder end socket circular seam, pressurization continues, the flexible metal frame shrinks towards the interior of the limiting support, the supporting effect is enhanced along with the increase of the shrinkage amount, after the flexible metal frame completely shrinks into the limiting support, the limiting support plays a supporting role, and the gradual supporting and enhancing effect is achieved; and the possibility that the inner surface of the end socket cylinder is damaged by direct hard support is avoided.

Description

TECHNICAL FIELD

[0001] The present application 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

[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, high-temperature heat input can easily cause stress concentration in the components, leading to deformation problems such as excessive ovality and local depression of the head or cylinder. In severe cases, rework is required, significantly increasing production costs and prolonging the production cycle.

[0003] Existing support tooling mainly adopts a rigid ring structure, which has several significant limitations. First, the tooling needs to be destructively removed. Before the head and the cylinder are connected, the rigid ring must be placed in the cylinder as a whole. After welding is completed, the tooling must be disassembled into multiple pieces to be removed from the equipment manhole. The damaged tooling is difficult to recycle and reuse, resulting in material waste and further increasing production costs. Second, the tooling has poor universality. The size and structure of the rigid ring tooling are fixed, and it needs to be customized for different diameters and wall thicknesses of pressure vessels. This not only increases the cost of tooling preparation but also requires additional space for storage, making management difficult. Third, the support effect is not good. The support position of the traditional rigid ring needs to be deliberately avoided from the welding area to prevent interfering with the welding operation, resulting in a certain distance between the support point and the weld. This makes it impossible to provide direct and effective support force to the key parts of the girth welding, especially for large-diameter, thin-walled pressure vessels in high-efficiency welding scenarios. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a support tooling for large-diameter, thin-walled pressure vessels that is non-destructive, highly universal, precise in support, and easy to operate, to solve the welding deformation problem of the head and the cylinder of the pressure vessel and reduce production costs.

[0005] To solve the above technical problems, the technical solution proposed by the present application is a detachable support device for large-diameter, thin-walled pressure vessels, which includes a support shaft, a rib support, a leg, a umbrella top limiting clamp, a manhole positioning support, and an umbrella handle clamp. The support shaft is hollow inside and is equipped with a rib adjusting hydraulic rod. Symmetrical strip-shaped holes are formed on the outer surface of the support shaft in the axial direction. The umbrella rib support is installed at one end of the support shaft through the umbrella top limiting clamp, and comprises a hydraulic support umbrella rib, an umbrella rib fixing shaft sleeve, a rotating pin shaft, an umbrella rib adjusting shaft sleeve, an umbrella rib linkage rod and a linkage pin shaft; the rotating pin shaft and the umbrella rib fixing shaft sleeve are installed below the umbrella top limiting clamp to fix and connect the hydraulic support umbrella rib with one end of the support shaft; the umbrella rib adjusting shaft sleeve comprises an umbrella rib adjusting shaft sleeve sleeve joint, an umbrella rib adjusting shaft sleeve positioning ring and an umbrella rib adjusting shaft sleeve counter sleeve joint; the axial outer side of the umbrella rib adjusting shaft sleeve sleeve joint and the telescopic end of the umbrella rib adjusting hydraulic rod are both provided with a pull ear, and are connected through a linkage bolt and a linkage nut penetrating through symmetrical strip-shaped holes on the outer surface of the support shaft; one side of the umbrella rib linkage rod is connected with the umbrella rib adjusting shaft sleeve counter sleeve joint through the umbrella rib adjusting shaft sleeve positioning ring, and the other side is connected with the hydraulic support umbrella rib through the linkage pin shaft; The support leg is arranged on the telescopic end of the hydraulic support umbrella rib, and comprises a roller shaft, a flexible metal frame, a support leg shaft and a limiting support; the limiting support is connected on the telescopic end of the hydraulic support umbrella rib, the flexible metal frame is connected with the limiting support through the support leg shaft, and the end of the flexible metal frame is connected with a support leg roller through the roller shaft, and the outer side of the support leg roller is sleeved with a roller rubber; The manhole positioning support is arranged on the side of the support shaft away from the umbrella rib support; the umbrella handle clamp is arranged 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 the manhole adjusting hydraulic rod is mounted on the mounting seat; the telescopic end of the manhole adjusting hydraulic rod is connected with the manhole positioning support, and the axial diameter of the manhole positioning support is made larger or smaller under the driving of the manhole adjusting hydraulic rod.

[0006] Further, the manhole positioning support comprises at least two shaft sleeves, a positioning support limiting clamp, a female joint and a female joint nut; one of the at least two shaft sleeves is fixed on the support shaft through the positioning support limiting clamp, and the remaining shaft sleeves are sequentially arranged on the support shaft towards the umbrella handle clamp; the shaft sleeve comprises a sleeve joint, a positioning ring and a counter sleeve joint, the sleeve joint and the counter sleeve joint are slotted in the axial direction to allow the support shaft to pass through, and an annular groove is further formed in the counter sleeve joint, and the positioning ring is mounted in the annular groove; two support plates are symmetrically arranged on the positioning ring of the shaft sleeve, and the two support plates on the at least two shaft sleeves are sequentially connected two by two through connecting pins, so that all the shaft sleeves are connected as a whole.

[0007] The beneficial effects of the present application are as follows: 1. By extending or retracting the rib hydraulic rod, pulling the rib adjusting shaft sleeve forward or backward along the umbrella shaft, and pressing or relaxing the rib linkage rod and the rib hydraulic rod, the rib linkage rod changes the support angle of the rib hydraulic rod, achieving the effect of opening and storing the ribs, thereby realizing the recycling of the support tool; 2. After the support leg is supported to the position of the ring seam of the cylinder head, continue to pressurize, so that the flexible metal frame shrinks inward to the limiting support, and as the shrinkage increases, the support effect is enhanced, when the flexible metal frame is completely shrunk into the limiting support, the limiting support plays a supporting role, achieving the effect of gradually increasing support, avoiding the possibility of direct hard support damaging the inner surface of the head cylinder. 3. By supporting the metal flexible frame on both sides of the weld, when the misalignment occurs, the lower position of the supporting flexible metal frame shrinks more inward, and the support effect is stronger, providing stronger resistance effect during welding shrinkage, so that the welding deformation is smaller; while the higher position of the supporting flexible metal frame shrinks less inward, and the support effect is relatively weaker, providing weaker resistance effect during welding shrinkage, so that the welding deformation is larger, achieving the effect of adjusting and reducing the misalignment by using welding deformation. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is the overall structure of the detachable support device in the embodiment of the present application.

[0009] Figure 2 is the manhole positioning support structure in the embodiment of the present application.

[0010] Figure 3 is the rib support structure in the embodiment of the present application.

[0011] Figure 4 is the rib adjusting shaft sleeve in the embodiment of the present application.

[0012] Figure 5 is the support leg in the embodiment of the present application.

[0013] Figure 6 is the support effect of the detachable support device in the embodiment of the present application. DETAILED DESCRIPTION

[0014] The detachable support device for large-diameter, thin-walled pressure vessels of the present application will be further described below in conjunction with specific embodiments and drawings EMBODIMENT

[0015] The detachable support device in the present embodiment, such as Figures 1 to 6As shown, it comprises support shaft 3, umbrella rib support 2, support leg 12, umbrella top limiting clamp 1, manhole positioning support 5 and umbrella handle clamp 8, support shaft 3 is hollow inside and is provided with umbrella rib adjusting hydraulic rod 6; the outer surface of support shaft 3 is provided with symmetrical strip-shaped holes in the axial direction; Umbrella rib support 2 is installed at one end of support shaft 3 through umbrella top limiting clamp 1, and umbrella rib support 2 comprises hydraulic support umbrella rib 2-4, umbrella rib fixing shaft sleeve 2-6, rotating pin shaft 2-5, umbrella rib adjusting shaft sleeve 2-1, umbrella rib linkage rod 2-2 and linkage pin shaft 2-3; rotating pin shaft 2-5 and umbrella rib fixing shaft sleeve 2-6 are installed below umbrella top limiting clamp 1 to fixedly connect hydraulic support umbrella rib 2-4 with one end of support shaft 3; umbrella rib adjusting shaft sleeve 2-1 comprises umbrella rib adjusting shaft sleeve sleeve joint 2-1-1, umbrella rib adjusting shaft sleeve positioning ring 2-1-2 and umbrella rib adjusting shaft sleeve counter sleeve joint 2-1-3; the axial outer side of umbrella rib adjusting shaft sleeve sleeve joint 2-1-1 and the telescopic end of umbrella rib adjusting hydraulic rod 6 are both provided with pull ears and are connected through linkage bolt 10 and linkage nut 11 which pass through the symmetrical strip-shaped holes in the outer surface of support shaft 3; one side of umbrella rib linkage rod 2-2 is connected with umbrella rib adjusting shaft sleeve counter sleeve joint 2-1-3 through umbrella rib adjusting shaft sleeve positioning ring 2-1-2, and the other side is connected with hydraulic support umbrella rib 2-4 through linkage pin shaft 2-3.

[0016] Support leg 12 is arranged on the telescopic end of hydraulic support umbrella rib 2-4, and support leg 12 comprises roller shaft 12-1, flexible metal frame 12-4, support leg shaft 12-5 and limiting support 12-6; limiting support 12-6 is connected on the telescopic end of hydraulic support umbrella rib 2-4, flexible metal frame 12-4 is connected with limiting support 12-6 through support leg shaft 12-5, and the end of flexible metal frame 12-4 is connected with support leg roller 12-3 through roller shaft 12-1, and support leg roller 12-3 is sleeved with roller rubber 12-2 outside.

[0017] Manhole positioning support 5 is arranged on the side of support shaft 3 away from umbrella rib support 2; umbrella handle clamp 8 is arranged on the other end of support shaft 3 away from umbrella rib support 2; mounting seat 7 is arranged on umbrella handle clamp 8, and manhole adjusting hydraulic rod 9 is mounted on mounting seat 7, the telescopic end of manhole adjusting hydraulic rod 9 is connected with manhole positioning support 5, and the shaft diameter of manhole positioning support 5 is made larger or smaller under the drive of manhole adjusting hydraulic rod.

[0018] The manhole positioning support 5 comprises at least two shaft sleeves, a positioning support limiting hoop 4, a female joint 5-1 and a female joint nut 5-2. One of the at least two shaft sleeves is fixed on the support shaft 3 through the positioning support limiting hoop 4, and the remaining shaft sleeves are sequentially arranged on the support shaft 3 in the direction of the umbrella handle hoop 8. The shaft sleeve comprises a sleeve joint 5-3, a positioning ring 5-4 and a matched sleeve joint 5-7, the sleeve joint 5-3 and the matched sleeve joint 5-7 are slotted in the axial direction to allow the support shaft 3 to pass through, and the matched sleeve joint 5-7 is further provided with an annular groove, and the positioning ring 5-4 is installed in the annular groove. The positioning ring 5-4 of the shaft sleeve is symmetrically provided with two support plates 5-6, and the two support plates 5-6 on the at least two shaft sleeves are sequentially connected by connecting pins 5-5 two by two, so that all the shaft sleeves are connected as a whole.

[0019] The use method of the detachable support device in the embodiment is as follows: In use, the detachable support device is put into the container from the manhole, the manhole positioning support 5 is placed in the manhole, the manhole positioning adjusting hydraulic rod 9 is elongated, the manhole positioning support 5 is tightened, the manhole positioning support 5 increases in size, and continues to be elongated with the manhole positioning adjusting hydraulic rod 9 to be firmly supported on the inner side of the manhole. At this time, the position of the support shaft 3 coincides with the position of the center line of the container, the umbrella rib adjusting hydraulic rod 6 is opened, the umbrella rib adjusting shaft sleeve 2-1 moves along the support shaft 3 to the top with the elongation of the umbrella rib adjusting hydraulic rod 6, drives the umbrella rib linkage rod 2-2 to support the hydraulic support umbrella rib 2-4, after being fully supported, the hydraulic support umbrella rib 2-4 is elongated until the support leg 12 supports the position of the ring seam of the cylinder head, continues to be pressurized, the flexible metal frame 12-4 is retracted into the limiting support 12-6, and the support effect is enhanced with the increase of the retraction amount. When the flexible metal frame 12-4 is completely retracted into the limiting support 12-6, the limiting support 12-6 plays a supporting role, and a gradual support enhancement effect is provided in the process, which avoids the possibility of damage to the inner surface of the head cylinder caused by direct hard support. At the same time, the structure of the metal flexible frame 12-4 can effectively cope with the misalignment problem in the head cylinder assembly. The roller supports (composed of a roller shaft 12-1, a roller rubber 12-2 and a support leg roller 12-3) on both sides of the weld are relatively independent. When misalignment occurs, the lower support flexible metal frame 12-4 retracts more inward, and the support effect is stronger. When welding and shrinking, a stronger resistance effect is provided, so that the welding deformation is smaller. The higher support flexible metal frame 12-4 retracts less inward, and the support effect is relatively weaker. When welding and shrinking, a weaker resistance effect is provided, so that the welding deformation is larger. Therefore, the present application can achieve the effect of adjusting and reducing misalignment by welding deformation.

[0020] When the umbrella is recovered, the hydraulic supporting ribs 2-4 are first recovered, then the umbrella adjusting shaft sleeve 2-1 moves to the bottom along the supporting shaft 3 with the shortening of the umbrella adjusting hydraulic rod 6, and drives the umbrella linkage rod 2-2 to recover the hydraulic supporting ribs 2-4, the manhole positioning adjusting hydraulic rod 9 is shortened, the manhole positioning support 5 is loosened, at this time the umbrella-shaped support can be taken out of the container and used next time.

[0021] The above detailed description of a series of embodiments is only a specific description of the feasible embodiments of the present application, and the above description of the embodiments is only used to help understand the method of the present application and its core idea, and it is not used to limit the protection scope of the present application. Any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there will be changes in the specific embodiments and application scope. In summary, the content of the present description should not be understood as a limitation of the present application.

Claims

1. A removable support device for large diameter, thin walled pressure vessels, characterized by: Including support shaft, umbrella rib support, support leg, umbrella top limiting clamp, manhole positioning support and umbrella handle clamp, the hollow support shaft is provided with umbrella rib adjusting hydraulic rod; the outer surface of the support shaft is provided with symmetrical strip-shaped holes in the axial direction; The umbrella rib support is installed at one end of the support shaft through the umbrella top limiting clamp, and the umbrella rib support includes hydraulic support umbrella rib, umbrella rib fixing shaft sleeve, rotating pin shaft, umbrella rib adjusting shaft sleeve, umbrella rib linkage rod and linkage pin shaft; the rotating pin shaft and the umbrella rib fixing shaft sleeve are installed below the umbrella top limiting clamp to fixedly connect the hydraulic support umbrella rib with one end of the support shaft; the umbrella rib adjusting shaft sleeve includes umbrella rib adjusting shaft sleeve sleeve joint, umbrella rib adjusting shaft sleeve positioning ring and umbrella rib adjusting shaft sleeve counter sleeve joint; the axial outer side of the umbrella rib adjusting shaft sleeve joint and the telescopic end of the umbrella rib adjusting hydraulic rod are provided with pull ears, and are connected through linkage bolts and linkage nuts penetrating through the symmetrical strip-shaped holes in the outer surface of the support shaft; one side of the umbrella rib linkage rod is connected with the umbrella rib adjusting shaft sleeve counter sleeve joint through the umbrella rib adjusting shaft sleeve positioning ring, and the other side is connected with the hydraulic support umbrella rib through the linkage pin shaft; The support leg is arranged on the telescopic end of the hydraulic support umbrella rib, and the support leg includes roller shaft, flexible metal frame, support leg shaft and limiting support; the limiting support is connected on the telescopic end of the hydraulic support umbrella rib, the flexible metal frame is connected with the limiting support through the support leg shaft, and the end of the flexible metal frame is connected with a support leg roller through the roller shaft, and the outer side of the support leg roller is sleeved with a roller rubber; The manhole positioning support is arranged on the side of the support shaft away from the umbrella rib support, the umbrella handle clamp is arranged 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 mounted on the mounting seat, the telescopic end of the manhole adjusting hydraulic rod is connected with the manhole positioning support, and the shaft diameter of the manhole positioning support is increased or decreased under the driving of the manhole adjusting hydraulic rod.

2. The collapsible support device of claim 1, wherein: The manhole positioning support includes at least two shaft sleeves, positioning support limiting clamp, female joint and female joint nut; one of the at least two shaft sleeves is fixed on the support shaft through the positioning support limiting clamp, and the remaining shaft sleeves are sequentially arranged on the support shaft towards the umbrella handle clamp; the shaft sleeve includes sleeve joint, positioning ring and counter sleeve joint, the sleeve joint and the counter sleeve joint are slotted in the axial direction so that the support shaft penetrates, and an annular groove is further formed in the counter sleeve joint, and the positioning ring is mounted in the annular groove; two support plates are symmetrically arranged on the positioning ring of the shaft sleeve, and the two support plates on the at least two shaft sleeves are sequentially connected two by two through connecting pins, so that all the shaft sleeves are connected as a whole.

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