A large-scale porous structure welding deformation control device

Abstract

The application discloses a large-scale porous structure welding deformation control device, which comprises an upper calibration seat (5), a supporting rod (6), a lower supporting seat (7) and a jack (8), the upper calibration seat (5) comprises a pressure plate (52), the supporting rod (6) comprises a supporting plate (61) and a connecting rod (62), the supporting plate (61) is arranged above the upper calibration seat (5), and the connecting rod (62) penetrates through a through hole of the pressure plate (52) and a round hole of a positioning plate three (3), the lower supporting seat (7) comprises a lower supporting plate (71) which is arranged at the lower end of the positioning plate three (3) and connected with the connecting rod (62), and the jack (8) is arranged between the supporting plate (61) and the pressure plate (52). The device disclosed by the application can play a key role in preventing deformation of a large-scale porous plate in a complex working environment, and an additional fixed fulcrum is not needed.

Description

Technical Field

[0001] This invention relates to a welding deformation control device for large porous structures, belonging to the field of nuclear power steam generator manufacturing. Background Technology

[0002] The internal heat exchange structure of the high-temperature reactor steam generator is supported by three perforated positioning plates. Since the heat exchange structure is a straight cylindrical structure that passes through the three perforated plates, the coaxiality of the holes in the three perforated positioning plates is required to be very high.

[0003] Since a large number of holes on the positioning plate will weaken its rigidity, welding is generally used for positioning in actual production. However, the welding process can easily cause the positioning plate to deform, which will destroy the relative positional relationship between the holes and cause assembly difficulties. Therefore, it is especially important to control the welding deformation of the positioning plate.

[0004] Due to structural constraints and limited welding space, the difficulty of controlling welding deformation varies among different positioning plates in a high-temperature reactor steam generator. Positioning plate one, located at the top, allows for easy welding with the bevel facing outwards, as does the bottom positioning plate three. However, positioning plate two, located in the middle, faces greater difficulty in controlling welding deformation due to space limitations. Furthermore, positioning plate two is situated inside the reactor cylinder, and welding temporary attachments to the inner surface of the cylinder is not permitted. This renders traditional anti-deformation methods, such as rigid fixation with welded tie plates, ineffective in preventing deformation of positioning plate two.

[0005] For the reasons mentioned above, it is necessary to conduct a more in-depth study on the welding deformation control of the positioning plate 2 in the high-temperature reactor steam generator in order to solve the above problems. Summary of the Invention

[0006] To overcome the above problems, in-depth research was conducted, and a welding deformation control device for large porous structures was proposed, including an upper calibration seat 5, a support rod 6, a lower support seat 7, and a jack 8.

[0007] The upper calibration seat 5 includes a pressure plate 52, which is a flat plate with a through hole in the middle. Its length is longer than the diameter of the circular hole on the second positioning plate, so that when the pressure plate 52 is placed above the circular hole of the second positioning plate, it can press down on the periphery of the circular hole of the second positioning plate.

[0008] The support rod 6 includes a support plate 61 and a connecting rod 62. The support plate 61 is positioned above the upper calibration seat 5, and the connecting rod 62 passes through the through hole of the pressure plate 52 and the round holes of the second and third positioning plates 3.

[0009] The lower support base 7 includes a lower support plate 71, which is disposed at the lower end of the positioning plate 33 and connected to the connecting rod 62, serving to fix the connecting rod axially.

[0010] The jack 8 is positioned between the support plate 61 and the pressure plate 52.

[0011] In a preferred embodiment, the upper calibration seat 5 further includes an arc plate 53 disposed below the pressure plate 52. The edge of the arc plate 53 is arc-shaped, and the circumcircle of its cross section corresponds to the diameter of the circular hole in the positioning plate.

[0012] In a preferred embodiment, there are two jacks 8, which are respectively disposed on both sides of the connecting rod 62.

[0013] In a preferred embodiment, the support plate 61 is provided with symmetrical openings 611 to facilitate lifting.

[0014] In a preferred embodiment, the lower support 7 further includes a pin 72, and a through hole is provided below the connecting rod 62. By inserting the pin 72 into the through hole, the lower end of the connecting rod 62 is fixed to the lower support plate 71.

[0015] In a preferred embodiment, two pin fixing sleeves 73 are provided at the lower end of the lower support plate 71 for fixing the pin 72.

[0016] In a preferred embodiment, the lower support base 7 further includes a fixing clip 74 for clamping the lower support plate 71 onto the positioning plate 3.

[0017] In a preferred embodiment, the fixing clamp 74 includes a long plate 741 and a short plate 743 parallel to the lower support plate 71, and a connecting shaft 742 perpendicular to the lower support plate 71. An elongated through hole is provided on the lower support plate 71, and the connecting shaft 742 passes through the elongated through hole. The upper end of the connecting shaft 742 is connected to the long plate 741, and the lower end is connected to the short plate 743.

[0018] In a preferred embodiment, the lower support 7 further includes a lug 75.

[0019] The present invention also provides a method for controlling welding deformation, which uses the above-mentioned device and includes the following steps:

[0020] S1, weld the positioning plate three to the high-temperature reactor steam generator;

[0021] S2. Hoist the pressure plate 52 of the upper calibration seat 5 above the second positioning plate, place the arc plate 53 into the round hole of the second positioning plate, hoist the lower support plate 71 at the lower end of the third positioning plate 3, and after the connecting rod 62 of the support rod 6 passes through the through hole of the pressure plate 52 and the round holes of the second positioning plate 2 and the third positioning plate 3, connect the lower support plate 71, and set the jack between the support plate 61 of the support rod 6 and the pressure plate 52.

[0022] S3. After spot welding the positioning plate 2, the pressure plate 52 is pressed down by adjusting the jack to control the pre-deformation of the positioning plate 2.

[0023] S4. Weld the positioning plate 1.

[0024] The beneficial effects of this invention include:

[0025] 1) It is simple to make, inexpensive, and can be reused for similar products;

[0026] 2) The amount of reverse deformation can be adjusted according to the deformation situation, while traditional methods such as tie plates are rigid and not flexible enough;

[0027] 3) It can play a key role in preventing deformation of large perforated plates in complex working environments, and does not require additional fixing points;

[0028] 4) The device adopts mechanical connection, which reduces the subsequent grinding work in the welding area compared with the traditional welding anti-deformation method, and improves the overall efficiency while preventing deformation.

[0029] 5) Compared with traditional welding methods for preventing deformation, the device of the present invention has a larger contact area, making the perforated plate more uniformly stressed and providing better anti-deformation effect for plates. Attached Figure Description

[0030] Figure 1 A schematic diagram of the overall structure of a welding deformation control device for large porous structures according to a preferred embodiment of the present invention is shown.

[0031] Figure 2 A schematic diagram of the calibration seat structure of a large porous structure welding deformation control device according to a preferred embodiment of the present invention is shown.

[0032] Figure 3 A front view of the calibration seat structure of a large porous structure welding deformation control device according to a preferred embodiment of the present invention is shown.

[0033] Figure 4 A schematic diagram of the support rod structure of a welding deformation control device for a large porous structure according to a preferred embodiment of the present invention is shown.

[0034] Figure 5 A schematic diagram of the lower support structure of a welding deformation control device for large porous structures according to a preferred embodiment of the present invention is shown.

[0035] Figure 6 A front view of the lower support structure of a large porous structure welding deformation control device according to a preferred embodiment of the present invention is shown.

[0036] Figure 7A schematic diagram of the lower support structure of a welding deformation control device for large porous structures according to a preferred embodiment of the present invention is shown.

[0037] Explanation of icon numbers:

[0038] 1-Positioning plate one;

[0039] 2-Positioning plate two;

[0040] 3-Positioning plate three;

[0041] 5-Upper calibration seat;

[0042] 6-Support rod;

[0043] 7-Lower support;

[0044] 8-jack;

[0045] 51-rib plate;

[0046] 52-Pressure plate;

[0047] 53-Arc plate;

[0048] 61-Support plate;

[0049] 62-Connecting rod;

[0050] 71-Lower support plate;

[0051] 72-Pin;

[0052] 73-Pin fixing sleeve;

[0053] 74-Fixing clip;

[0054] 75-Hanging lug;

[0055] 611 - Opening;

[0056] 741 - Longboard;

[0057] 742 - Connecting shaft;

[0058] 743 - Shortcomings. Detailed Implementation

[0059] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more apparent.

[0060] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0061] The internal heat exchange structure of the high-temperature reactor steam generator includes three porous positioning plates, namely positioning plate 1, positioning plate 2, and positioning plate 3, as follows: Figure 1 As shown, the positioning plates are located at the upper, middle, and lower positions of the heat exchange structure, and have multiple round holes.

[0062] According to the present invention, a welding deformation control device for large porous structures is provided, such as... Figure 1 , 2 As shown in Figures 7 and 8, the system includes an upper calibration seat 5, a support rod 6, a lower support seat 7, and a jack 8.

[0063] The upper calibration seat 5 includes a pressure plate 52, which is a flat plate with a through hole in the middle. Its length is longer than the diameter of the circular hole on the positioning plate, so that when the pressure plate 52 is placed above the circular hole of the positioning plate, it can press down on the periphery of the circular hole of the positioning plate 2.

[0064] The support rod 6 includes a support plate 61 and a connecting rod 62. The support plate 61 is positioned above the upper calibration seat 5, and the connecting rod 62 passes through the through hole of the pressure plate 52 and the round holes of the second positioning plate 2 and the third positioning plate 3.

[0065] The lower support 7 includes a lower support plate 71, which is disposed at the lower end of the positioning plate 3 and connected to the connecting rod 62, thereby providing axial fixation for the connecting rod.

[0066] The jack 8 is positioned between the support plate 61 and the pressure plate 52. Through its lifting action, it presses down the pressure plate 52, thereby rigidly fixing it during the welding process of the positioning plate 2 and preventing welding deformation.

[0067] Preferably, after the pressure plate 52 is placed above the circular hole of the positioning plate, the contact length between both ends of the pressure plate and the positioning plate is greater than 30mm, so as to ensure sufficient rigidity in the subsequent support and correction process.

[0068] In a preferred embodiment, such as Figure 2 , 3 As shown, the upper calibration seat 5 also includes an arc plate 53, which is disposed below the pressure plate 52. The edge of the arc plate 53 is arc-shaped, and the circumcircle of its cross section corresponds to the diameter of the circular hole of the positioning plate. The pressure plate 52 is fixed directly above the circular hole of the positioning plate by the arc plate 53 to prevent the pressure plate from sliding or misaligning.

[0069] Preferably, the thickness of the arc plate 53 is not less than 40mm to ensure positioning strength and avoid damage to the positioning plate.

[0070] In a preferred embodiment, the upper calibration seat 5 further includes a stiffening plate 51 to enhance the structural strength of the support plate.

[0071] Preferably, the reinforcing ribs are arranged above the pressure plate, and there are two of them, symmetrically distributed in the width direction of the pressure plate, so as to increase the bending resistance of the pressure plate.

[0072] In a preferred embodiment, there are two jacks 8, which are respectively disposed on both sides of the connecting rod 62.

[0073] In a preferred embodiment, such as Figure 4 As shown, the support plate 61 and the connecting rod 62 are welded together. Preferably, a notch is opened above the connecting rod 62, and the support plate 61 and the connecting rod 62 are welded together after the notch is clearance fit.

[0074] In a preferred embodiment, the support plate 61 is provided with symmetrical openings 611 to facilitate lifting.

[0075] In a preferred embodiment, such as Figure 5-7 As shown, the lower support base 7 also includes a pin 72, and a through hole is provided below the connecting rod 62. By inserting the pin 72 into the through hole, the lower end of the connecting rod 62 is fixed to the lower support plate 71.

[0076] Preferably, two pin fixing sleeves 73 are provided at the lower end of the lower support plate 71 to fix the pin 72, that is, the pin passes through one pin fixing sleeve, the through hole of the connecting rod 62 and the other pin fixing sleeve in sequence.

[0077] Preferably, the lower support base 7 further includes a fixing clip 74 for clamping the lower support plate 71 onto the positioning plate 3, thereby facilitating fixed positioning.

[0078] Preferably, the fixing clip 74 has multiple clips.

[0079] Preferably, the fixing clamp 74 includes a long plate 741 and a short plate 743 parallel to the lower support plate 71, and a connecting shaft 742 perpendicular to the lower support plate 71. An elongated through hole is provided on the lower support plate 71, and the connecting shaft 742 passes through the elongated through hole. The upper end of the connecting shaft 742 is connected to the long plate 741, and the lower end is connected to the short plate 743.

[0080] According to the present invention, when the lower support plate 71 is placed at a suitable position below the positioning plate 3, the fixing clamp 74 moves through the elongated through hole to the central axis position of the lower support plate 71, so that the long plate 741 retracts into the round hole of the positioning plate 3; then the lower support seat 7 is lifted, and after the long plate 741 passes through the round hole of the positioning plate 3, the fixing clamp 74 is moved away from the central axis of the lower support plate 71, thereby clamping the lower support seat 7 on the positioning plate 3.

[0081] In a preferred embodiment, the lower support 7 further includes a lifting lug 75 to facilitate the lifting of the lower support.

[0082] The present invention also discloses a method for controlling the welding deformation of the positioning plate 2 in a high-temperature reactor steam generator using the above-mentioned device, comprising the following steps:

[0083] S1, weld the positioning plate three to the high-temperature reactor steam generator;

[0084] S2. Hoist the pressure plate 52 of the upper calibration seat 5 above the second positioning plate, place the arc plate 53 into the round hole of the second positioning plate, hoist the lower support plate 71 at the lower end of the third positioning plate 3, and after the connecting rod 62 of the support rod 6 passes through the through hole of the pressure plate 52 and the round holes of the second positioning plate 2 and the third positioning plate 3, connect the lower support plate 71, and set the jack between the support plate 61 of the support rod 6 and the pressure plate 52.

[0085] S3. After spot welding the positioning plate 2, the pressure plate 52 is pressed down by adjusting the jack to control the pre-deformation of the positioning plate 2.

[0086] S4. Weld the positioning plate 1.

[0087] In S2, preferably, the lower end of the connecting rod 62 is fixed to the lower support plate 71 by a pin 72.

[0088] Preferably, the lower support 7 is clamped onto the positioning plate 3 by the fixing clip 74.

[0089] Preferably, a level is placed on the positioning plate 2, and more preferably, multiple levels are placed to determine the levelness of the positioning plate 2.

[0090] In S2, multiple large-scale porous structure welding deformation control devices are installed, with each device installed in a different positioning plate hole.

[0091] More preferably, five large porous welding deformation control devices are installed, one of which is located in the circular hole at the center of the positioning plate, and the other four are arranged in a square on the horizontal cross section, with the center of the square located on the axis of the positioning plate.

[0092] In S3, after the positioning plate 2 is fixed by spot welding, the pre-deformation control of the positioning plate 2 is achieved by adjusting the lifting height of the jack.

[0093] Preferably, in S3, after the positioning plate 2 is fixed by spot welding, multiple layers of welding are performed. After each layer is welded, the deformation of the positioning plate 2 is analyzed by observing the deviation of the level, and then the jack is adjusted to ensure the flatness of the positioning plate.

[0094] Preferably, the multi-layer welding consists of no fewer than 5 layers.

[0095] Preferably, after the positioning plate 2 is spot-welded and fixed, before the first layer of welding, the lifting height of the jack in the porous structure welding deformation control device is controlled so that the center position of the positioning plate 2 deforms downwards by 10mm relative to the preset position, and the four surrounding positions deform downwards by 6mm relative to the preset position. Under this setting, the positioning plate 2 can obtain the best welding quality after welding, and the positioning plate 2 has basically no welding deformation after welding.

[0096] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship in the working state of this invention, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0097] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0098] The present invention has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present invention based on these embodiments, all of which fall within the scope of protection of the present invention.

Claims

1. A welding deformation control device for large porous structures, characterized in that, The device is used in the internal heat exchange structure of a high-temperature reactor steam generator. The structure includes three porous positioning plates, namely positioning plate one (1), positioning plate two (2) and positioning plate three (3), which are located at the upper, middle and lower positions of the heat exchange structure, respectively. The positioning plates have multiple round holes. The large porous structure welding deformation control device includes an upper calibration seat (5), a support rod (6), a lower support seat (7) and a jack (8). The upper calibration seat (5) includes a pressure plate (52), which is a flat plate with a through hole in the middle. Its length is longer than the diameter of the hole on the second positioning plate (2), so that when the pressure plate (52) is set above the hole on the second positioning plate (2), it can press down on the periphery of the hole on the second positioning plate (2). The support rod (6) includes a support plate (61) and a connecting rod (62). The support plate (61) and the connecting rod (62) are welded and fixed together. The support plate (61) is set above the upper calibration seat (5). The connecting rod (62) passes through the through hole of the pressure plate (52) and the round holes of the second positioning plate (2) and the third positioning plate (3). The lower support base (7) includes a lower support plate (71), which is disposed at the lower end of the positioning plate three (3) and connected to the connecting rod (62). The jack (8) is positioned between the support plate (61) and the pressure plate (52); The lower support base (7) also includes a pin (72), and a through hole is provided below the connecting rod (62). By inserting the pin (72) into the through hole, the lower end of the connecting rod (62) is fixed on the lower support plate (71). The lower support base (7) also includes a fixing clip (74) for clamping the lower support plate (71) on the positioning plate three (3). The fixing clamp (74) includes a long plate (741) and a short plate (743) parallel to the lower support plate (71), and a connecting shaft (742) perpendicular to the lower support plate (71). A long strip-shaped through hole is provided on the lower support plate (71), and the connecting shaft (742) passes through the long strip-shaped through hole. The upper end of the connecting shaft (742) is connected to the long plate (741), and the lower end is connected to the short plate (743).

2. The welding deformation control device for large porous structures according to claim 1, characterized in that, The upper calibration seat (5) also includes an arc plate (53), which is located below the pressure plate (52). The edge of the arc plate (53) is arc-shaped, and the circumcircle of its cross section corresponds to the diameter of the two circular holes of the positioning plate.

3. The welding deformation control device for large porous structures according to claim 1, characterized in that, The jack (8) has two parts, which are respectively set on both sides of the connecting rod (62).

4. The welding deformation control device for large porous structures according to claim 1, characterized in that, The support plate (61) is provided with symmetrical openings (611) to facilitate lifting.

5. The welding deformation control device for large porous structures according to claim 1, characterized in that, Two pin fixing sleeves (73) are provided at the lower end of the lower support plate (71) for fixing the pin (72).

6. The welding deformation control device for large porous structures according to claim 1, characterized in that, The lower support (7) also includes a lug (75).

7. A method for controlling welding deformation, using the apparatus described in any one of claims 1-6, characterized in that, Includes the following steps: S1, weld positioning plate three (3) into the high temperature reactor steam generator; S2. Hoist the pressure plate (52) of the upper calibration seat (5) above the second positioning plate, place the arc plate (53) into the round hole of the second positioning plate, hoist the lower support plate (71) at the lower end of the third positioning plate (3), and after the connecting rod (62) of the support rod (6) passes through the through hole of the pressure plate (52) and the round holes of the second positioning plate (2) and the third positioning plate (3), connect the lower support plate (71), and set the jack between the support plate (61) and the pressure plate (52) of the support rod (6); S3. After spot welding the positioning plate two (2), the positioning plate two (2) is pre-deformed by adjusting the jack to press down the pressure plate (52). S4. Weld the positioning plate (1).

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