Auxiliary tool for welding heat treatment of circumferential weld of large pressure vessel barrel

Abstract

The utility model discloses an auxiliary tool for welding heat treatment of a circumferential weld of a large pressure vessel barrel, which comprises support frames arranged on two sides at intervals, and a variable-diameter annular inductor winding mechanism is assembled and connected between the support frames; the mechanism comprises a plurality of bracket units, each bracket unit comprises arc-shaped brackets arranged on the two sides at intervals, each arc-shaped bracket comprises a center arc frame located in the center, and a plurality of side edge arc frames are hinged to the two ends of each center arc frame respectively; the arc-shaped brackets are fixedly connected through a plurality of connecting columns; protruding parts arranged in a protruding mode are integrally formed at the bottom of the center arc frame. The tool further comprises a frame fixedly connected between the protruding parts. The side arc frame is installed on the frame through a radian adjusting mechanism. The radian of the bracket unit can be adjusted through the radian adjusting mechanism. According to the device, the auxiliary tool is adjusted in an edge diameter adjusting mode according to barrels with different calibers, and then the machining requirement is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of the welding of pressure vessel cylinders, and particularly relates to an auxiliary tooling for the welding heat treatment of the circumferential welds of large pressure vessel cylinders. Background Art

[0002] At present, gas heating and resistance heating processes are usually adopted for preheating and post-heating hydrogen elimination in the manufacturing process of pressure vessels. The gas heating process uses a gas tooling to rely on the method of flame combustion and heats the equipment through heat conduction and radiation.

[0003] Its disadvantages are that the energy utilization efficiency is very low, only about 40%, there are safety hazards and the natural gas pipeline needs to be rearranged, and the cost is expensive. Resistance heating is to wrap the resistance heating sheet on the outer surface of the head, and the resistance sheet generates heat to heat the workpiece through conduction and radiation.

[0004] Its disadvantages are that the effective energy utilization rate is only about 50%, the heating speed is slow, the heater life is short, and the heat penetration is poor, which cannot meet the wall thickness requirements of large pressure vessels at the present stage.

[0005] Electromagnetic induction heating is energy-saving and environment-friendly, has high heating efficiency and is not easy to be damaged, and the heating is uniform. Therefore, electromagnetic induction heating is selected for welding heat treatment.

[0006] However, most of the existing electromagnetic induction heating auxiliary toolings cannot realize the variable diameter function, and the heat treatment diameter is single; although a few variable diameter induction heating auxiliary toolings can adapt to different heat treatment diameters, the heat treatment range is limited and can only cover part of the circumference. Usually, the cylinder is rolled by a roller rack for post-weld heat treatment of the circumferential weld. It is inconvenient to operate on large pressure-bearing equipment, requires additional energy consumption and cannot perform heat treatment on the entire circumferential weld at the same time, and the effect is not good; at the same time, in order to realize the heat treatment of large pressure vessels, the tooling is often bulky and not easy to move, and even requires hoisting resources to cooperate with the use. Therefore, in production, it is urgent to develop an induction heating welding heat treatment auxiliary tooling that is easy to move, integrated, and variable in diameter. Summary of the Utility Model

[0007] Based on the above background, the purpose of the utility model is to provide an auxiliary tooling for the welding heat treatment of the circumferential welds of large pressure vessel cylinders.

[0008] To achieve the above purpose, the utility model adopts the following technical solutions:

[0009] An auxiliary tooling for the welding heat treatment of the circumferential welds of large pressure vessel cylinders, including support frames arranged at intervals on both sides, and a variable diameter annular inductance winding mechanism is assembled and connected between the support frames;

[0010] The annular inductor winding mechanism includes a number of bracket units. Each bracket unit includes arc-shaped brackets spaced apart on both sides. The arc-shaped brackets include a central arc bracket at the central position. Both ends of the central arc bracket are respectively hinged with a number of side arc brackets;

[0011] The arc-shaped brackets are fixedly connected by a number of connecting columns;

[0012] A convex part is integrally formed at the bottom of the central arc bracket. The auxiliary tooling for the circumferential weld welding heat treatment of the large pressure vessel cylinder body further includes a frame fixedly connected between the convex parts;

[0013] The side arc brackets are installed on the frame through a radian adjustment mechanism; through the radian adjustment mechanism, the radian of the bracket unit can be adjusted;

[0014] The bottom of the frame is installed with an adjustment rod through an angle adjustment mechanism. The adjustment rod is fixedly connected to the support frame.

[0015] Preferably, first side arc brackets are respectively installed on both sides of the central arc bracket, and second side arc brackets are respectively installed on the first side arc brackets.

[0016] Preferably, one end between the central arc bracket and the first side arc bracket is hinged through a pin shaft, and a locking nut is threadedly connected to the pin shaft;

[0017] One end between the other end of the first side arc bracket and the first end of the second side arc bracket is hinged through a pin shaft, and a locking nut is threadedly connected to the pin shaft.

[0018] Preferably, curved convex seats are integrally formed at the bottoms of the second side arc brackets respectively. A rotating shaft is rotatably connected between the curved convex seats. An adjustment arm is fixedly connected to the rotating shaft. A radian adjustment structure is provided at the lower end of the adjustment arm. The radian adjustment structure is installed on the frame.

[0019] Preferably, a number of parallel inner fixing columns are fixedly connected inside the frame. The radian adjustment structure includes a fixing seat fixedly connected to the inner fixing column. An adjustment seat is fixedly connected to the top of the fixing seat;

[0020] An arc-shaped adjustment opening is formed in the adjustment seat. An inner sliding screw rod slidably connected in the arc-shaped adjustment opening is fixedly connected to the lower end of the adjustment arm;

[0021] A locking nut is threadedly connected to the inner sliding screw rod.

[0022] Preferably, the angle adjustment mechanism includes an arc-shaped connecting seat. Both ends of the arc-shaped connecting seat are respectively fixedly connected to the inner fixing columns on both sides;

[0023] The bottom of the arc-shaped connecting seat is fixedly connected with an angle adjustment structure, and the angle adjustment structure is fixedly connected to the adjustment rod.

[0024] Preferably, the support frame is a telescopic frame that can be adjusted;

[0025] The bottom of the support frame is fixedly connected with a base, and the top of the base is fixedly connected with a counterweight.

[0026] Preferably, a plurality of rollers are installed at the bottom of the base.

[0027] Preferably, the adjustment rod is a telescopic rod, and the adjustment rod is detachably installed on the support frame.

[0028] The present utility model has the following beneficial effects:

[0029] 1. The welding heat treatment of cylinders with various diameters can be adapted by this tooling without rolling the equipment, and the operation is simple. The circumferential weld can be integrally heat-treated. At the same time, the electromagnetic induction heating technology is adopted, which is energy-saving and environmentally friendly and saves costs.

[0030] 2. The operation flexibility is high, various types of cylinders can be processed, and the operation is labor-saving and easy to operate during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0032] Figure 1 It is a schematic structural diagram of the bracket unit in the embodiment of the present utility model;

[0033] Figure 2 It is a schematic structural diagram of the radian adjustment structure in the embodiment of the present utility model;

[0034] Figure 3 It is a schematic overall structural diagram in the embodiment of the present utility model;

[0035] Figure 4 It is a schematic structural diagram of the support frame in the embodiment of the present utility model.

[0036] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indication will also change accordingly.

[0039] In addition, in the present invention, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0040] Embodiment 1

[0041] As Figures 1-4 shown, an auxiliary tooling for the welding heat treatment of the girth weld of a large pressure vessel cylinder body includes support frames 8 arranged at intervals on the left and right sides. An annular inductor winding mechanism 1 with variable diameter is assembled and connected between the support frames 8. The diameter can be changed through the annular inductor winding mechanism 1 (that is, the size of the circular hole can be changed to only be applicable to the welding treatment of pressure vessel cylinders with different diameters). During the working process, the coil for inductive heating is wound on the annular inductor winding mechanism 1 with a closed-loop structure.

[0042] The annular inductor winding mechanism 1 includes a number of annularly distributed bracket units. The bracket unit includes arc brackets arranged at intervals on both sides (the arc brackets on both sides are fixedly connected by a number of connecting columns to form an integral structure on both sides). And the structure of each arc bracket is:

[0043] The arc bracket includes a central arc frame 11 located at the central position. Two side arc frames are respectively hinged at both ends of the central arc frame 11, thus forming a total of five arc frame structures.

[0044] Specifically, first side arc brackets 12 are respectively installed on both sides of the central arc bracket 11, and second side arc brackets 13 are respectively installed on the first side arc brackets 12. One end between the central arc bracket 11 and the first side arc bracket 12 is hinged by a pin shaft, and a locking nut is threadedly connected to the pin shaft; one end between the other end of the first side arc bracket 12 and the first end of the second side arc bracket 13 is hinged by a pin shaft, and a locking nut is threadedly connected to the pin shaft.

[0045] At the same time, the second side arc brackets 13 (on the left) at both end positions are connected to another bracket unit through a pin shaft-locking nut structure. In this way, all bracket units are connected to form a closed-loop annular structure.

[0046] A protruding part 111 is integrally formed at the bottom of the central arc bracket 11. The auxiliary tooling for the circumferential weld welding heat treatment of the large pressure vessel cylinder body further includes a frame 4 fixedly connected between the protruding parts 111; the side arc brackets are installed on the frame 4 through a radian adjusting mechanism; through the radian adjusting mechanism, the radian of the bracket unit can be adjusted.

[0047] After adjusting the radian (the size of the central angle) of the bracket unit, the size of the aperture of the entire annular inductor winding mechanism 1 is changed. For example, when the radian of each bracket unit becomes larger, the aperture of the annular inductor winding mechanism 1 is increased (after adjusting the radian, the arc length of each bracket unit becomes longer or shorter. After forming a closed loop, the perimeter of the total annular structure becomes larger or smaller, so as to meet the welding processing requirements of cylinders with different apertures. In the actual working process, in order to form a closed loop, the number of sequentially connected and hinged bracket units can be increased or decreased according to actual needs. For example, calculate the number according to the perimeter of the cylinder body and the adjustable arc length of the bracket unit and calculate the radian to be adjusted).

[0048] The bottom of the frame 4 is installed with an adjusting rod 7 through an angle adjusting mechanism, and the adjusting rod 7 is fixedly connected to the support frame 8. Specifically, the same as the existing detachable method, the adjusting rod 7 is installed on the support frame 8 in a detachable installation manner. For example, a screw rod (not shown in the figure) penetrating the support frame 8 is fixedly connected to the adjusting rod 7, and a nut is fastened to the screw rod.

[0049] In the actual working process, since not all bracket units need angle adjustment, some bracket units can be directly installed on the adjusting rod in a fixed manner without angle adjustment.

[0050] Embodiment 2

[0051] Such as Figures 1-4As shown, on the basis of the structure of Embodiment 1, curved convex seats are integrally formed at the bottom of the second side arc frames 13 respectively. A rotating shaft 31 is rotatably connected between the curved convex seats. An adjusting arm 32 is fixedly connected to the rotating shaft 31. A radian adjusting structure 33 is provided at the lower end of the adjusting arm 32. The radian adjusting structure 33 is installed on the frame 4.

[0052] Specifically, a number of parallel inner fixing columns 41 are fixedly connected inside the frame 4. The radian adjusting structure 33 includes a fixed seat 332 fixedly connected to the inner fixing column 41. An adjusting seat 331 is fixedly connected to the top of the fixed seat 332; an arc-shaped adjusting opening 3311 is formed in the adjusting seat 331. According to the existing sliding connection method, an inner sliding screw (not shown in the figure) that is fixedly connected to the lower end of the adjusting arm 32 and slidably connected in the arc-shaped adjusting opening 3311; a locking nut (not shown in the figure) is threadedly connected to the inner sliding screw.

[0053] During the adjustment process, when the nuts on the pins at both ends of the second side arc frame 13 are loosened, the second side arc frame 13 is flipped to adjust the angle. During the flipping process, the adjusting arm 32 slides arcuately relative to the arc-shaped adjusting opening 3311. After sliding and adjusting to the target position, at this time, the radian adjustment of the bracket unit is completed. After adjustment and shaping, the inner sliding screw - locking nut is locked to lock the adjusting arm 32. At the same time, the second side arc frame 13 is locked (the nuts on the pins are locked).

[0054] In this way, the radian of each bracket unit is changed according to the diameter of the cylinder body to be welded, so as to obtain a ring-shaped inductor winding mechanism 1 with different diameters after the bracket units are assembled. Thus, the welding requirements are met.

[0055] Embodiment 3

[0056] As Figures 1-4 shown, on the basis of the structure of Embodiment 2, in order to adjust the relative angle between the bracket unit and the support frame 8 to facilitate the docking between the bracket units, the above angle adjusting mechanism includes an arc-shaped connecting seat 5. Both ends 51 of the arc-shaped connecting seat 5 are respectively fixedly connected to the inner fixing columns 41 on both sides; an angle adjusting structure 6 is fixedly connected to the bottom of the arc-shaped connecting seat 5. The angle adjusting structure 6 is fixedly connected to the adjusting rod 7. Specifically, the screw and nut structure disclosed in the prior art is used for angle adjustment. The specific method is: a convex seat is integrally formed at the bottom of the arc-shaped connecting seat 5. A screw is fixedly connected to the convex seat. Correspondingly, a screw seat for rotatably connecting the screw is fixedly connected to the top of the adjusting rod 7. A nut that is threadedly connected to the screw and presses and locks the screw seat is provided. When the angle is adjusted, the screw and the screw seat rotate relative to each other. After the angle adjustment is completed, the screw seat is pressed and locked by the nut to maintain the positioning.

[0057] Embodiment 4

[0058] As Figures 1-4 shown, on the basis of the structure of Embodiment 3, the present embodiment has the same height adjustment method as the existing one. The above-mentioned support frame 8 is a telescopic frame that can be adjusted. Specifically, the structure of the telescopic frame is a conventional height adjustment frame disclosed in the prior art. The specific adjustment method is as follows: The lower end of the support frame 8 is a fixed end, and the upper end of the support frame 8 is an upper end frame. The rod body of the upper end frame is slidably connected in the rod cavity of the lower end frame. At the same time, a plurality of lock holes at different height positions are provided on the rod body of the upper end frame. Through the lock rod slidably connected to the lower end frame, during the height adjustment process, after the lock rod penetrates into the lock holes at different height positions, the height adjustment is locked.

[0059] The same as the above telescopic adjustment structure, the above-mentioned adjusting rod 7 is a telescopic rod. Specifically, the telescopic rod also includes a fixed rod portion fixed on the support frame 8 and a telescopic rod portion slidably connected to the fixed rod portion, and the length adjustment is also fixed through the above-mentioned lock hole-lock rod structure.

[0060] Embodiment 5

[0061] As Figures 1-4 shown, on the basis of the structure of Embodiment 3, a base 10 is fixedly connected to the bottom of the above-mentioned support frame 8, and a counterweight 9 is fixedly connected to the top of the base 10. A plurality of rollers 101 (the rollers 101 are installed at the bottom of the base 10 in a conventional manner disclosed in the prior art) are installed at the bottom of the base 10. The function of the counterweight 9 is to maintain the weight balance on both sides and prevent tipping over. At the same time, during the working process of the rollers 101, the entire device is aligned with the mouth of the welded cylinder, inserted into the cylinder and slid to the position of the weld.

[0062] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. An auxiliary tooling for heat treatment of the girth weld of a large pressure vessel cylinder, characterized in that: It comprises support frames spaced apart on both sides, and a ring-shaped inductor winding mechanism with a variable diameter is assembled and connected between the support frames; The annular inductor winding mechanism includes a plurality of bracket units, the bracket units include arc brackets spaced apart on both sides, the arc bracket includes a central arc frame located at the center, and a plurality of side arc frames are hingedly connected at both ends of the central arc frame; The arc-shaped brackets are fixedly connected by a plurality of connecting columns; The bottom of the central arc frame is integrally formed with a protruding portion, and the auxiliary tooling for welding heat treatment of the girth weld of the large pressure vessel cylinder also includes a frame fixedly connected between the protruding portions; The side arc bracket is installed on the frame through an arc adjustment mechanism; through the arc adjustment mechanism, the arc of the bracket unit can be adjusted; An adjusting rod is installed at the bottom of the frame through an angle adjusting mechanism, and the adjusting rod is fixedly connected to the supporting frame.

2. The auxiliary tooling for welding heat treatment of the girth weld of a large pressure vessel cylinder according to claim 1 is characterized in that: First side arc frames are respectively installed on both sides of the central arc frame, and second side arc frames are respectively installed on the first side arc frames.

3. The auxiliary tooling for welding heat treatment of the girth weld of a large pressure vessel cylinder according to claim 2 is characterized in that: The central arc frame is hinged to one end of the first side arc frame via a pin shaft, and a locking nut is threadedly connected to the pin shaft; The other end of the first side arc frame is hinged to one end of the second side arc frame through a pin shaft, and a locking nut is threadedly connected to the pin shaft.

4. The auxiliary tooling for welding heat treatment of the girth weld of a large pressure vessel cylinder according to claim 3 is characterized in that: The bottom of the second side arc frame is respectively integrally formed with a curved boss, a rotating shaft is rotatably connected between the curved bosses, an adjusting arm is fixedly connected to the rotating shaft, a curvature adjusting structure is provided at the lower end of the adjusting arm, and the curvature adjusting structure is installed on the frame.

5. The auxiliary tooling for welding heat treatment of the girth weld of a large pressure vessel cylinder according to claim 4 is characterized in that: A plurality of parallel internal fixing columns are fixedly connected in the frame, and the curvature adjustment structure includes a fixing seat fixedly connected to the internal fixing columns, and an adjustment seat is fixedly connected to the top of the fixing seat; The adjusting seat is provided with an arc-shaped adjusting opening, and the lower end of the adjusting arm is fixedly connected with an inner sliding screw which is slidably connected in the arc-shaped adjusting opening; The inner sliding screw is threadedly connected with a locking nut.

6. The auxiliary tooling for welding heat treatment of the girth weld of a large pressure vessel cylinder according to claim 5 is characterized in that: The angle adjustment mechanism comprises an arc-shaped connecting seat, and the two ends of the arc-shaped connecting seat are respectively fixedly connected to the internal fixing columns on both sides; The bottom of the arc-shaped connecting seat is fixedly connected with an angle adjustment structure, and the angle adjustment structure is fixedly connected to the adjustment rod.

7. The auxiliary tooling for heat treatment of the girth weld of a large pressure vessel cylinder according to claim 1 is characterized in that: The support frame is an adjustable telescopic frame; The bottom of the support frame is fixedly connected with a base, and the top of the base is fixedly connected with a counterweight.

8. The auxiliary tooling for welding heat treatment of the girth weld of a large pressure vessel cylinder according to claim 7 is characterized in that: A plurality of rollers are installed at the bottom of the base.

9. The auxiliary tooling for welding heat treatment of the girth weld of a large pressure vessel cylinder according to claim 1 is characterized in that: The adjusting rod is a telescopic rod, and the adjusting rod is detachably mounted on the supporting frame.

Images