Auxiliary welding device for corrugated pipe for nuclear fusion

Abstract

The utility model provides an auxiliary welding device for a corrugated pipe for nuclear fusion, and relates to the technical field of production and processing of CFT feeder lines. A far-end limiting assembly and a near-end limiting assembly are arranged for limiting relative to a flange and a pipe ring in a corrugated pipe body, and the far-end limiting assembly is used for limiting the end face, deviating from a welding area, of the pipe ring and the end face, deviating from the welding area, of the flange; the near-end limiting assembly is used for limiting the end face, facing the welding area, of the pipe ring and limiting the flange facing the welding area. The technical problem that in the prior art, after welding is completed in a spot welding mode, a spot fixing block needs to be ground and removed, and the risk that the surface of a welded part is damaged exists is solved, and the technical effect of improving the welding quality of the corrugated pipe is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of production and processing of CFT feeder lines, in particular to an auxiliary welding device for a bellows used for nuclear fusion. Background Art

[0002] The nuclear fusion tokamak bellows is an important component in the feeder system of the nuclear fusion experimental reactor. It is mainly used to connect insulators and vacuum partitions, absorb (compensate) the relative displacement generated during the operation of the device, and maintain the stability of the device. Therefore, the welding quality of the bellows plays a vital role in the overall operation of the system.

[0003] The connection part of the bellows mainly involves the welding of the bellows body, the Dewar short tube, the feeder through-body flange and the feeder through-body shell. In the prior art, a plurality of stainless steel spot fixing blocks are usually used to connect and fix the spot fixing blocks to the welded parts by spot welding to determine the assembly gap and perform anti-deformation constraints. Since the wall thickness of the bellows used for nuclear fusion is relatively thin and the vacuum sealing performance requirements are relatively high, the spot fixing blocks need to be polished and removed after the spot welding is completed, which has the risk of damaging the surface of the welded parts and affecting the processing quality of the bellows. Utility Model Content

[0004] The purpose of the utility model is to provide an auxiliary welding device for a bellows used for nuclear fusion, so as to alleviate the technical problem in the prior art that, due to the thin wall thickness of the bellows used for nuclear fusion and the high requirement for vacuum sealing performance, the spot welding method is used and the spot solid blocks need to be polished and removed after the welding is completed, which poses a risk of damaging the surface of the welded parts.

[0005] In a first aspect, the utility model provides an auxiliary welding device for a bellows for nuclear fusion, comprising a bellows body, a first connecting pipe and a second connecting pipe, wherein the bellows body is welded between the first connecting pipe and the second connecting pipe, and is characterized in that it also comprises a plurality of distal stopper assemblies and a proximal stopper assemblies, and pipe rings are provided at both ends of the bellows body, and the pipe rings are respectively used to be connected to the first connecting pipe and the second connecting pipe through flanges;

[0006] A plurality of the distal stop assemblies and a plurality of the proximal stop assemblies are respectively arranged around the welding area between the pipe ring and the flange;

[0007] The distal end limiting assembly is used for limiting the position between the end surface of the pipe ring away from the welding area and the end surface of the flange away from the welding area;

[0008] The proximal end limiting assembly is used for limiting the end surface of the pipe ring toward the welding area and the flange toward the welding area.

[0009] In combination with the first aspect, the utility model provides a first possible implementation manner of the first aspect, wherein the tube ring comprises a tube body and a plurality of lifting ears, and the plurality of lifting ears are arranged around the outer side of the tube body.

[0010] In combination with the first possible implementation of the first aspect, the utility model provides a second possible implementation of the first aspect, wherein the distal end limit assembly comprises a guide block, a rod body, a locking member and a slider, the rod body extends along one end of the guide block, and the slider slides along the rod body;

[0011] The guide block is provided with a first contact surface, and the slider is provided with a second contact surface, the first contact surface and the second contact surface are arranged opposite to each other, and the first contact surface abuts against the end surface of the lifting ear away from the welding area, and the second contact surface abuts against the end surface of the flange away from the welding area; and the slider is used to adjust the distance between the flange and the pipe body;

[0012] When the slider drives the flange to move to a suitable position, the locking member is used to lock the slider.

[0013] In combination with the second possible implementation of the first aspect, the utility model provides a third possible implementation of the first aspect, wherein the rod body passes through the slider, and a portion of the rod body extending out of the slider is provided with an external thread;

[0014] The locking member is a nut, and the nut is used to limit the movement of the slider by cooperating with the external thread.

[0015] In combination with the third possible implementation of the first aspect, the utility model provides a fourth possible implementation of the first aspect, wherein a gasket is provided between the nut and the slider.

[0016] In combination with the fifth possible implementation of the first aspect, the utility model provides a fifth possible implementation of the first aspect, wherein the proximal limit assembly includes an external hexagonal bolt, a screw rod, a first nut, a second nut and a spacer, the lifting ear is provided with a through hole, the screw rod passes through the through hole, the first nut and the second nut are respectively clamped on two sides of the lifting ear; and the first nut and the second nut move along the screw rod respectively;

[0017] The end of the screw rod facing the flange is provided with the cushion block, and the cushion block abuts against the flange;

[0018] The hexagonal bolt is used to adjust the distance between the pad and the flange by rotating the screw rod.

[0019] In combination with the fifth possible implementation of the first aspect, the utility model provides a sixth possible implementation of the first aspect, wherein the cushion block is detachably connected to the screw rod.

[0020] In combination with the sixth possible implementation of the first aspect, the utility model provides a seventh possible implementation of the first aspect, wherein the external hexagonal bolt is detachably connected to the screw rod.

[0021] In combination with the sixth possible implementation manner of the first aspect, the utility model provides an eighth possible implementation manner of the first aspect, wherein a first groove is provided on the outer edge of the tube body.

[0022] In combination with the eighth possible implementation of the first aspect, the utility model provides a ninth possible implementation of the first aspect, wherein the inner circle of the flange is provided with a second groove matched with the first groove.

[0023] The embodiment of the utility model brings the following beneficial effects: the bellows body is welded between the first connecting pipe and the second connecting pipe, wherein the first connecting pipe or the second connecting pipe can be a Dewar short pipe composed of a short pipe and a flange surface, or can be a component composed of a feeder through-body flange and a feeder through-body separately. In actual use, a combination of a Dewar short pipe, a feeder through-body and a bellows body is usually adopted. During the connection process, the pipe rings on both sides of the bellows body are first pre-installed with the Dewar short pipe or the feeder through-body flange, a welding area is formed between the pipe ring and the flange, and a far-end limit assembly is used to separate the pipe ring from the welding area. The limiting mechanism between the end face of the domain and the end face of the flange facing away from the welding area, and the limiting mechanism between the end face of the pipe ring toward the welding area and the flange toward the welding area, can achieve a certain control assembly and anti-deformation effect through the combined use of the two. After welding, the steps of grinding and removing the solid block spot welding in the prior art are eliminated, and the far-end limiting assembly and the proximal limiting assembly can be directly removed, thereby reducing the risk of damaging the welding surface, and alleviating the technical problem that the spot welding method in the prior art needs to be ground and removed after the welding is completed, which poses a risk of damaging the surface of the welded parts, thereby achieving the technical effect of improving the welding quality of the corrugated pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the overall structure of an auxiliary welding device for a bellows used for nuclear fusion provided by an embodiment of the utility model;

[0026] Figure 2 A schematic structural diagram of a bellows main body in an auxiliary welding device for a bellows for nuclear fusion provided by an embodiment of the utility model;

[0027] Figure 3 A schematic structural diagram of a distal stop assembly in an auxiliary welding device for a bellows for nuclear fusion provided by an embodiment of the utility model;

[0028] Figure 4 A schematic structural diagram of a proximal stop assembly in an auxiliary welding device for a bellows used for nuclear fusion provided in an embodiment of the utility model.

[0029] Icons: 10 - first connecting pipe fitting; 20 - second connecting pipe fitting; 30 - bellows body; 31 - pipe ring; 32 - pipe body; 33 - lifting ear; 40 - proximal limit assembly; 41 - external hexagonal bolt; 42 - screw rod; 43 - first nut; 44 - second nut; 45 - spacer; 50 - distal limit assembly; 51 - guide block; 52 - slider; 53 - gasket; 54 - locking piece; 55 - rod body; 60 - flange. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figure 1 - Figure 4 As shown, the utility model provides an auxiliary welding device for a bellows for nuclear fusion, comprising a bellows body 30, a first connecting pipe 10 and a second connecting pipe 20, wherein the bellows body 30 is welded between the first connecting pipe 10 and the second connecting pipe 20, and is characterized in that it also comprises a plurality of distal stopper assemblies 50 and a proximal stopper assemblies 40, and pipe rings 31 are provided at both ends of the bellows body 30, and the pipe rings 31 are respectively used to be connected to the first connecting pipe 10 and the second connecting pipe 20 through flanges 60;

[0034] A plurality of distal stop assemblies 50 and a plurality of proximal stop assemblies 40 are respectively disposed around the welding area between the pipe ring 31 and the flange 60;

[0035] The distal end limiting assembly 50 is used for limiting the end surface of the pipe ring 31 away from the welding area and the end surface of the flange 60 away from the welding area;

[0036] The proximal limiting assembly 40 is used to limit the end surface of the pipe ring 31 toward the welding area and the flange 60 toward the welding area.

[0037] The bellows body 30 is welded between the first connecting pipe 10 and the second connecting pipe 20, wherein the first connecting pipe 10 or the second connecting pipe 20 can be a Dewar short pipe composed of a short pipe and a flange 60, or can be a component composed of a feeder through-body flange 60 and a feeder through-body separately. In actual use, a combination of a Dewar short pipe, a feeder through-body and a bellows body 30 is usually adopted. During the connection process, the pipe rings 31 on both sides of the bellows body 30 are first pre-installed with the Dewar short pipe or the feeder through-body flange 60, a welding area is formed between the pipe ring 31 and the flange 60, and the pipe ring 31 is welded away from the distal stop assembly 50. The end face of the area and the end face of the flange 60 away from the welding area are limited, and the end face of the pipe ring 31 toward the welding area and the flange 60 toward the welding area are limited. Through the combined use of the two, a certain control assembly and anti-deformation effect can be achieved. After welding, the steps of grinding and removing the solid block spot welding in the prior art are eliminated, and the far-end limit assembly 50 and the proximal limit assembly 40 can be directly removed, thereby reducing the risk of damaging the welding surface, and alleviating the technical problem that the spot welding method in the prior art needs to be ground and removed after the welding is completed, which poses a risk of damaging the surface of the welded parts, thereby achieving the technical effect of improving the welding quality of the corrugated pipe.

[0038] Furthermore, the tube ring 31 includes a tube body 32 and a plurality of lifting ears 33 , and the plurality of lifting ears 33 are disposed around the outer side of the tube body 32 .

[0039] Before welding, the first connecting pipe body 32 and the second connecting pipe body 32 need to be pre-installed with the bellows main body 30 respectively. In this embodiment, the first connecting pipe body 32 is a Dewar short tube, and the second connecting pipe body 32 is a feeder through-body shell, wherein the pipe ring 31 in the bellows main body 30 will be welded to the feeder through-body flange 60; the pipe ring 31 in the bellows main body 30 will be welded to the flange 60 in the Dewar short tube; the feeder through-body flange 60 will be welded to the feeder through-body shell.

[0040] Furthermore, the distal stop assembly 50 includes a guide block 51, a rod 55, a locking member 54 and a slider 52, wherein the rod 55 extends from one end of the guide block 51, and the slider 52 slides along the rod 55;

[0041] The guide block 51 is provided with a first contact surface, and the slider 52 is provided with a second contact surface. The first contact surface and the second contact surface are arranged opposite to each other, and the first contact surface abuts against the end surface of the lifting ear 33 away from the welding area, and the second contact surface abuts against the end surface of the flange 60 away from the welding area; and the slider 52 is used to adjust the distance between the flange 60 and the tube body 32;

[0042] When the slider 52 drives the flange 60 to move to a suitable position, the locking member 54 is used to lock the slider 52 .

[0043] Furthermore, the rod body 55 passes through the slider 52, and the portion of the rod body 55 extending out of the slider 52 is provided with an external thread;

[0044] The locking member 54 is a nut, and the nut is used to limit the movement of the slider 52 by cooperating with the external thread.

[0045] Install each distal limit assembly 50 one by one, place the clamp-shaped fixed end of the guide block 51 close to the surface of the ear 33 close to one end of the bellows body 30, place the clamp-shaped fixed end of the sliding block close to the surface of the Dewar short tube or the feeder through-body flange 60 away from the bellows, fine-tune the relative position of the welded parts to obtain a suitable welding gap, slide the slider 52 at the same time, tighten the locking nut, so as to determine the distal relative position of the bellows body 30 and the Dewar short tube and the feeder through-body flange 60.

[0046] It should be noted that the guide block 51 is integrally made of stainless steel to improve the mechanical strength.

[0047] Furthermore, a gasket 53 is provided between the nut and the slider 52 .

[0048] The function of the gasket 53 is to prevent the screw rod 42 from being subjected to force and damaging the feeder through-body flange 60 or the end face of the Dewar short tube flange 60 .

[0049] Further, the proximal stop assembly 40 includes an external hexagonal bolt 41, a screw rod 42, a first nut 43, a second nut 44 and a spacer 45. The ear 33 is provided with a through hole, the screw rod 42 passes through the through hole, the first nut 43 and the second nut 44 are respectively clamped on both sides of the ear 33; and the first nut 43 and the second nut 44 move along the screw rod 42 respectively;

[0050] A spacer 45 is provided at the end of the screw 42 facing the flange 60, and the spacer 45 abuts against the flange 60;

[0051] The hexagonal bolt 41 is used to adjust the distance between the spacer 45 and the flange 60 by rotating the screw rod 42 .

[0052] Install each proximal limit assembly 40 one by one, pass the screw 42 through the through hole on the lifting ear 33 and the first nut 43 and the second nut 44 placed on both sides of the lifting hole, and place the pad 45 on the root of the screw 42 and the surface of the Dewar short tube or the feeder through-body flange 60 close to the bellows body 30 respectively, rotate the nut to adjust the position of the screw 42, so that the root of the screw 42 is tightly against the pad 45, thereby determining the proximal relative position of the bellows body 30 and the Dewar short tube and the feeder through-body flange 60, and also completing the assembly work required for bellows welding.

[0053] Furthermore, the cushion block 45 is detachably connected to the screw rod 42 .

[0054] Furthermore, the hexagonal bolt 41 is detachably connected to the screw rod 42 .

[0055] The spacer 45 and the hexagonal bolt 41 are detachably connected to the screw rod 42 , respectively, and their main function is to prevent the bolt from causing damage to the parts in contact with the bolt.

[0056] Furthermore, a first groove is provided on the outer edge of the tube body 32 .

[0057] Furthermore, the inner circle of the flange 60 is provided with a second groove matched with the first groove.

[0058] By providing the first groove and the second groove, the pipe body 32 and the flange 60 can be directly installed more closely and convenient for later welding. In this embodiment, the angles of the first groove and the second groove are both 45°.

[0059] This embodiment achieves the following technical effects:

[0060] (1) Improve the efficiency and accuracy of weld joint assembly;

[0061] (2) It can play a certain role in welding anti-deformation;

[0062] (3) Reduce the construction intensity of personnel;

[0063] (4) Simple design and production, low cost;

[0064] (5) Highly targeted and easy to operate;

[0065] (6) Reusable.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An auxiliary welding device for a bellows for nuclear fusion, comprising a bellows body (30), a first connecting pipe (10) and a second connecting pipe (20), wherein the bellows body (30) is welded between the first connecting pipe (10) and the second connecting pipe (20), characterized in that: It also includes a plurality of distal stop assemblies (50) and proximal stop assemblies (40), and pipe rings (31) are provided at both ends of the bellows body (30), and the pipe rings (31) are respectively used to be connected to the first connecting pipe member (10) and the second connecting pipe member (20) through flanges (60); A plurality of the distal stop assemblies (50) and a plurality of the proximal stop assemblies (40) are respectively arranged around the welding area between the pipe ring (31) and the flange (60); The distal end limiting assembly (50) is used for limiting the position between the end surface of the pipe ring (31) away from the welding area and the end surface of the flange (60) away from the welding area; The proximal limit assembly (40) is used to limit the end surface of the pipe ring (31) toward the welding area and the flange (60) toward the welding area.

2. The auxiliary welding device for bellows used for nuclear fusion according to claim 1, characterized in that: The tube ring (31) comprises a tube body (32) and a plurality of lifting ears (33), wherein the plurality of lifting ears (33) are arranged around the outer side of the tube body (32).

3. The auxiliary welding device for bellows used for nuclear fusion according to claim 2, characterized in that: The distal end limiting assembly (50) comprises a guide block (51), a rod body (55), a locking member (54) and a slider (52), wherein the rod body (55) extends out from one end of the guide block (51), and the slider (52) slides along the rod body (55); The guide block (51) is provided with a first contact surface, and the slider (52) is provided with a second contact surface, the first contact surface and the second contact surface are arranged opposite to each other, and the first contact surface abuts against the end surface of the lifting ear (33) away from the welding area, and the second contact surface abuts against the end surface of the flange (60) away from the welding area; and the slider (52) is used to adjust the distance between the flange (60) and the tube body (32); When the slider (52) drives the flange (60) to move to a suitable position, the locking member (54) is used to lock the slider (52).

4. The auxiliary welding device for bellows used for nuclear fusion according to claim 3, characterized in that: The rod body (55) passes through the slider (52), and the portion of the rod body (55) extending out of the slider (52) is provided with an external thread; The locking member (54) is a nut, and the nut is used to limit the movement of the slider (52) by cooperating with the external thread.

5. The auxiliary welding device for bellows used for nuclear fusion according to claim 4, characterized in that: A gasket (53) is provided between the nut and the slider (52).

6. The auxiliary welding device for bellows used for nuclear fusion according to claim 2, characterized in that: The proximal stop assembly (40) comprises an external hexagonal bolt (41), a screw rod (42), a first nut (43), a second nut (44) and a cushion block (45); the ear (33) is provided with a through hole, the screw rod (42) passes through the through hole, the first nut (43) and the second nut (44) are respectively clamped on two sides of the ear (33); and the first nut (43) and the second nut (44) are respectively moved along the screw rod (42); The end of the screw rod (42) facing the flange (60) is provided with the cushion block (45), and the cushion block (45) abuts against the flange (60); The hexagonal bolt (41) is used to adjust the distance between the cushion block (45) and the flange (60) by rotating the screw rod (42).

7. The auxiliary welding device for bellows used for nuclear fusion according to claim 6, characterized in that: The cushion block (45) is detachably connected to the screw rod (42).

8. The auxiliary welding device for bellows used for nuclear fusion according to claim 6, characterized in that: The external hexagonal bolt (41) is detachably connected to the screw rod (42).

9. The auxiliary welding device for bellows used for nuclear fusion according to claim 2, characterized in that: The outer edge of the tube body (32) is provided with a first groove.

10. The auxiliary welding device for bellows used for nuclear fusion according to claim 9, characterized in that: The inner circle of the flange (60) is provided with a second groove matched with the first groove.

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