A locking device for preventing deformation of a screen weld

Abstract

The application relates to a locking device for preventing deformation in lattice frame welding, and relates to the technical field of steel frame welding, which comprises a base, a locking assembly and a pre-locking assembly; the base is arranged below the locking assembly; the locking assembly comprises a supporting frame, a supporting plate and a plurality of adjusting bolts; the supporting frame is arranged above the base; the supporting plate is arranged in the supporting frame to divide the supporting frame into a placing area and a welding area; the placing area is used for placing square tubes; the welding area is used for welding the square tubes by an operator; the plurality of adjusting bolts are all in threaded connection with the supporting plate; a fixing area is left between every two adjusting bolts; the square tubes are arranged in the fixing area to be fixed; the pre-locking assembly is arranged in the welding area; the pre-locking assembly comprises a bearing plate and a plurality of limiting rods; the bearing plate is arranged on one side of the supporting plate; a plurality of placing grooves are formed in the bearing plate; the limiting rods are correspondingly arranged in the placing grooves and can slide along the bearing plate; and one end of the limiting rod is arranged on the supporting plate. The application has the effects of improving the perpendicularity of lattice frame welding and welding efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel frame welding, in particular to a locking device for preventing deformation during frame welding. BACKGROUND

[0002] Spent fuel, also known as irradiated nuclear fuel, is used nuclear fuel that has been subjected to radiation, usually generated by nuclear reactors of nuclear power plants. The spent fuel taken out of the reactor usually needs to be stored in a storage pool for a certain period of time after decay cooling before it is sent to a reprocessing plant, and the frame is set for the storage of spent fuel. The spent fuel generated by nuclear power needs to be treated, and whether it is transported, transferred or stored, it needs to be stored using frame equipment. The assembly and welding of the frame are the difficulties of manufacturing, and the control of welding deformation has been a long-term research problem for manufacturers.

[0003] The frame is mainly composed of a plurality of frame plates that are spliced and welded together. Since the perpendicularity requirement of the frame plate is relatively high, the frame plate needs to be inserted into the bottom plate during splicing and welding, and the bottom plate is used to fix the frame plate. Then, the plurality of frame plates inserted into the bottom plate are welded. In order to ensure the precision requirement of the frame splicing and welding, the bottom plate and the frame plate need to be precisely positioned during splicing and welding. At present, the main way is to pre-weld some steel plates supporting the frame plate on the surface of the base, and form a welding area through the steel plate. The welding area is used for inserting the frame plate, and the steel plate is used to limit the frame plate to reduce the deformation of the square tube and the base during welding.

[0004] For the related technology in the above, the welding area formed by the steel plate is relatively closed, and the top and bottom of the frame need to be welded during welding of the frame. After the top and bottom of the frame are fixed, the frame is taken out to complete the welding of the remaining parts. The remaining parts are prone to deformation during welding, which reduces the perpendicularity of the frame, and is not conducive to operation, resulting in low efficiency of frame welding. SUMMARY

[0005] In order to improve the perpendicularity and welding efficiency of the frame, the present application provides a locking device for preventing deformation during frame welding.

[0006] The locking device for preventing deformation during frame welding provided by the present application adopts the following technical scheme:

[0007] The utility model provides a locking device for preventing deformation of lattice welding, comprising a base, a locking assembly and a pre-locking assembly, the base is placed below the locking assembly, the locking assembly comprises a support frame, a support plate and a plurality of adjusting bolts, the support frame is placed above the base, the support plate is arranged in the support frame to divide the support frame into a placing area and a welding area, the placing area is used for placing square tubes, the welding area is used for welding the square tubes by an operator, the plurality of adjusting bolts are threadedly connected with the support plate, a fixing area is left between every two adjusting bolts, and the square tubes are fixed in the fixing area, the pre-locking assembly is arranged in the welding area, the pre-locking assembly comprises a receiving plate and a plurality of limiting rods, the receiving plate is arranged on one side of the support plate, a plurality of placing grooves are formed in the receiving plate, the limiting rods are correspondingly arranged in the placing grooves and can slide along the receiving plate, one end of each limiting rod is arranged on the support plate, and every two limiting rods clamp one square tube, a plurality of jacking bolts are threadedly connected with the square tube along the height direction of the square tube, and the jacking direction of the jacking bolts is towards the welding area.

[0008] By adopting the above technical scheme, when welding the lattice, the support frame is fixed on the base, the square tubes are sequentially placed in the placing area, the limiting rods are first penetrated through the placing grooves and the support plate, one square tube to be welded is placed between every two limiting rods, the limiting rods can abut against the square tubes, the square tubes are clamped between the two limiting rods, after adjusting the perpendicularity of the square tubes, the square tubes are further fixed by the adjusting bolts until all the square tubes are fixed, after welding the square tubes, the lattice plates are inserted into the corresponding grooves, the top and bottom of the lattice plates are pre-welded, then the jacking bolts are used to abut against the lattice plates close to the square tubes, finally, the remaining parts of the lattice plates are welded until the welding of the lattice is completed, the jacking bolts limit the lattice plates during the welding of the lattice plates, the possibility of deformation of the lattice plates during the welding of the lattice plates is reduced, and thus the perpendicularity and welding efficiency of the lattice welding are improved.

[0009] Optionally, a plurality of locking assemblies are arranged, the plurality of locking assemblies are arranged along the height direction of the square tube, and one pre-locking assembly is arranged on one locking assembly.

[0010] By adopting the above technical scheme, the plurality of locking assemblies and the pre-locking assembly can fix the square tubes along the height direction of the square tubes, the stability of the square tubes is improved, the square tubes are convenient to weld, and the perpendicularity of the welding is improved.

[0011] Optionally, the support frame is a support half ring, and locking pieces are arranged on the two support half rings to fix the support half rings.

[0012] By adopting the above technical scheme, the locking pieces fix the two support half rings into a ring-shaped support frame, the circular shape facilitates the rotation of the support frame, the lattice can be rotated circumferentially after the welding of the lattice is completed, and the lattice is convenient to reinforce and weld or check.

[0013] Optionally, a plurality of jacking assemblies are arranged in the welding area, one jacking assembly corresponding to one pre-locking assembly, the jacking assembly comprising a jacking disc and jacking teeth arranged at intervals on the periphery of the jacking disc, the jacking disc being coaxially arranged with the supporting half-ring, a placing cavity being left between each adjacent two jacking teeth, the jacking teeth being used to jack the limiting rod into the placing area surrounded by the supporting plate.

[0014] By adopting the above technical scheme, when the limiting rod needs to be jacked for pre-fixing the pipe, the jacking disc is rotated, so that the jacking teeth jack the limiting rod, and as the rotating disc rotates, the limiting rod slides out of the placing cavity along the placing groove and extends into the placing area, thereby facilitating the pre-fixing of the limiting rod for the pipe.

[0015] Optionally, the jacking disc comprises a first rotating disc and a second rotating disc, the first rotating disc being arranged above the second rotating disc and coaxially arranged with the second rotating disc, the jacking teeth being arranged on the periphery of the first rotating disc, and the periphery wall of the second rotating disc extending beyond the tooth bottom of the jacking teeth.

[0016] By adopting the above technical scheme, the second rotating disc can receive the limiting rod, facilitating the jacking of the limiting rod by the jacking teeth and reducing the possibility of the limiting rod being stuck during jacking.

[0017] Optionally, a rotating rod is coaxially arranged on the jacking disc, the rotating rod being connected with a plurality of jacking discs, and one end of the rotating rod close to the base being rotationally connected with the base.

[0018] By adopting the above technical scheme, when the pipe is pre-positioned, the rotating rod is rotated, and the rotating rod drives a plurality of jacking discs to simultaneously jack the limiting rod, thereby improving the efficiency of fixing the limiting rod for the pipe and the welding efficiency of the lattice frame.

[0019] Optionally, a plurality of grooves are arranged on one end of the base close to the supporting plate, the grooves being used to place the lattice frame plate.

[0020] By adopting the above technical scheme, when the lattice frame plate is installed, the lattice frame plate is clamped in the grooves, thereby facilitating the pre-placement of the lattice frame plate.

[0021] Optionally, the receiving plate is open at the top close to the placing groove.

[0022] By adopting the above technical scheme, the placing groove of the receiving plate is open at the top, and when the limiting rod is placed, the limiting rod can be clamped into the placing groove from top to bottom, thereby facilitating the installation of the limiting rod.

[0023] Optionally, a clamping plate is arranged on the receiving plate, one end of the clamping plate close to the limiting rod being provided with a plug column, the plug column being arranged in the placing groove and being inserted on the limiting rod.

[0024] By adopting the technical scheme, after the square tube is welded, the inserting post is inserted on the limiting rod, the clamping plate and the bearing plate are abutted, the clamping plate and the bearing plate are gripped, the limiting rod is pulled out, the pre-locking assembly is removed, the welding area is cleaned, and the plurality of grid plates are placed in the welding area to be welded. The locking device formed by the square tube and the locking assembly supports the plurality of grid plates to assist the welding of the plurality of grid plates, and the perpendicularity of the plurality of grid plates during welding is improved.

[0025] Optionally, the limiting rod is covered with a damping layer on the side.

[0026] By adopting the technical scheme, the damping layer can improve the friction between the limiting rod and the square tube, thereby improving the stability of the square tube and the perpendicularity of the grid.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. By arranging the locking assembly and the pre-locking assembly on the base, the base is partitioned by the support frame in the locking assembly, the square tube is placed in the placement area, the limiting rod in the pre-locking assembly is used for clamping, the adjusting bolt is used for further fixing the square tube after clamping, the positioning and welding of the square tube are facilitated, the grid plate is limited by the jacking bolt, the possibility of deformation of the grid plate during welding is reduced, and the perpendicularity and welding efficiency of the grid are improved;

[0029] 2. By arranging the jacking assembly at the end of the limiting rod away from the support frame, when the jacking assembly is used, the rotating rod is rotated, the rotating rod drives the top disc, the top disc drives the top teeth to jack the limiting rod, so that every two limiting rods abut against the square tube, the efficiency of fixing the square tube is improved, the efficiency of welding the square tube is improved, the locking device is completed, and then the plurality of grid plates are placed in the welding area to be welded, the grid is facilitated to be welded, and the perpendicularity of the grid is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The structure diagram of the grid of the embodiment of the present application.

[0031] Figure 2 The structure diagram of the locking device for preventing deformation of the grid during welding according to the embodiment of the present application.

[0032] Figure 3 The partial exploded view of the locking device for preventing deformation of the grid during welding according to the embodiment of the present application.

[0033] Figure 4It is a state diagram of a locking device for preventing deformation of a welding frame placed in a frame plate.

[0034] Figure 5 It is a structure diagram of the locking device for preventing deformation of the welding frame in a top view.

[0035] Figure 6 It is a structure diagram of a square tube of the locking device for preventing deformation of the welding frame.

[0036] Figure 7 It is a perspective view of the locking device for preventing deformation of the welding frame.

[0037] Figure 8 It is a local structure diagram of the locking device for preventing deformation of the welding frame, in which multiple square tubes are hidden.

[0038] Figure 9 It is a local perspective view of the locking device for preventing deformation of the welding frame.

[0039] Figure 10 It is a local explosion diagram of a clamping plate and a receiving plate of the locking device for preventing deformation of the welding frame.

[0040] Marked for explanation: 1, base; 11, groove; 12, lifting hole; 2, locking assembly; 21, support frame; 211, support half ring; 212, locking piece; 22, support plate; 23, adjusting bolt; 3, pre-locking assembly; 31, receiving plate; 311, placing groove; 32, limiting rod; 33, clamping plate; 34, insertion column; 4, placing area; 5, welding area; 6, fixing area; 7, square tube; 71, jacking bolt; 8, jacking assembly; 81, top disc; 811, first rotating disc; 812, second rotating disc; 82, top tooth; 83, placing cavity; 84, rotating rod; 9, frame plate. DETAILED DESCRIPTION

[0041] The following will be described in detail in combination with the accompanying drawings. Figures 1-9 The application will be further described in detail.

[0042] The embodiment of the application discloses a locking device for preventing deformation of welding of a frame. Figure 1 、 Figure 2 It comprises a base 1, a locking assembly 2 and a pre-locking assembly 3, and the shape of the frame to be welded is overall in a "cross" shape in the embodiment, and the frame is assembled and welded by multiple frame plates 9.

[0043] The following will be described in detail in combination with the accompanying drawings. Figure 2 、 Figure 3, the base 1 is disc-shaped, the base 1 is placed below the locking assembly 2, the locking assembly 2 comprises a support frame 21, a support plate 22 and a plurality of adjusting bolts 23, the support frame 21 is placed above the base 1, a plurality of grooves 11 are formed in one end of the base 1 close to the support plate 22, the plurality of grooves 11 divide the central region of the base 1 into a plurality of cubic blocks, that is, a plurality of convex cubic blocks form a plurality of grooves 11, a plurality of grooves 11 are arranged in the embodiment and are transversely and longitudinally staggered and interconnected, and the plurality of grooves 11 form the shape of the grid frame to be welded. A plurality of lifting holes 12 are formed in the base 1, the lifting holes 12 facilitate the lifting and moving of the locking device by the operator, thereby facilitating the lifting and overturning of the grid frame.

[0044] With reference to Figure 3 , Figure 4 and Figure 5 , the support frame 21 is two support half-rings 211, and the two support half-rings 211 are provided with locking members 212, which can be bolts or fixed pins. In the embodiment, the locking members 212 are bolts, and the locking members 212 are used to connect and fix the two support half-rings 211. The support plate 22 is arranged in the support frame 21 to divide the support frame 21 into a placement area 4 and a welding area 5, and the support plate 22 is welded with the support frame 21. The placement area 4 and the welding area 5 can be adjusted according to the specific shape of the grid frame. When adjusting, the shape and position of the support plate 22 are adjusted. In the embodiment, the support plate 22 is circumferentially arranged in the support frame 21 along the axis of the base 1, and the support plate 22 is welded with the support frame 21. The support plate 22 is used to surround the central region of the base 1 to form a welding area 5 with the same cross-sectional shape as the grid frame. The placement area 4 is located between the support plate 22 and the support half-ring 211, and is used to place the square tube 7. The welding area 5 is used for welding the square tube 7 by the operator, and is also used to place a plurality of grid plates 9. After the welding of the square tube 7 is completed, the plurality of grid plates 9 are inserted into the corresponding grooves 11, and the plurality of grid plates 9 are welded to improve the perpendicularity of the grid frame. The plurality of adjusting bolts 23 are threadedly connected with the support plate 22. The number of adjusting bolts 23 can be adjusted according to the number of square tubes 7 to be welded. Two adjusting bolts 23 can be symmetrically arranged on each side of each square tube 7, or a plurality of adjusting bolts 23 can be symmetrically arranged. The plurality of adjusting bolts 23 can further improve the stability of the locking square tube 7. In the embodiment, two adjusting bolts 23 are symmetrically arranged on each side of each square tube 7. The adjusting bolts 23 are countersunk bolts, and the surface of the nut of the countersunk bolt is flush with the surface of the support plate 22, so that the surface away from the support half-ring 211 of the support plate 22 is a flush surface, so as to facilitate the fitting of the grid plate 9 with the side surface of the support plate 22, and to improve the perpendicularity of the grid plate 9 during welding. A fixing area 6 is left between every two adjusting bolts 23, and the square tube 7 is fixed in the fixing area 6.

[0045] With reference to Figure 6The plurality of jacking bolts 71 are threadedly connected to two sides of the square tube 7 through fixing rings, and the jacking direction of the jacking bolts 71 is inwardly jacked into the welding area 5. When the welding lattice plate 9 is welded, the lattice plate 9 is correspondingly arranged in the groove 11, and after the square tube 7 and the support frame 21 are fixed, the top and bottom of the lattice plate 9 which is attached to the square tube 7 is spot-welded first, so that the lattice plate 9 is pre-fixed. After the lattice plate 9 is pre-fixed, the jacking bolt 71 is used to jacking the lattice plate 9 close to the square tube 7, and the lattice plate 9 is fully welded. The jacking bolt 71 limits the lattice plate 9, so that the possibility of deformation of the lattice plate 9 during welding is reduced.

[0046] With reference to Figure 7 The locking assembly 2 is provided with a plurality of locking assemblies 2, and four locking assemblies 2 are provided in the embodiment. The four locking assemblies 2 are arranged at equal intervals along the high edge direction of the square tube 7, and the plurality of locking assemblies 2 can improve the stability of the square tube 7 during welding, thereby improving the perpendicularity of the square tube 7 after welding. In order to facilitate the pre-fixing of the square tube 7 and the fixing of the square tube 7, one pre-locking assembly 3 is correspondingly arranged on one locking assembly 2. After the pre-locking assembly 3 preliminarily adjusts the perpendicularity of the square tube 7, the pre-locking assembly 3 can pre-fix the square tube 7. After pre-fixing is completed, the locking assembly 2 is used again for fixing, so as to further adjust the perpendicularity of the square tube 7 and improve the stability of the locking assembly 2 when fixing the square tube 7, thereby improving the perpendicularity of the square tube 7 after welding.

[0047] Specifically, with reference to Figure 7 、 Figure 8 The pre-locking assembly 3 is arranged in the welding area 5, and the pre-locking assembly 3 includes a receiving plate 31 and a plurality of limiting rods 32. The receiving plate 31 is arranged on one side of the support plate 22, and the receiving plate 31 can be fixed on one side of the support plate 22 by bolts or latches. In the embodiment, the receiving plate 31 is clamped between the two support plates 22 which are symmetrical to each other. A plurality of placement grooves 311 are formed in the receiving plate 31, and the positions of the placement grooves 311 correspond to the positions of the two sides of the square tube 7 which need to be pre-fixed. The limiting rods 32 are inserted into the placement grooves 311. The placement grooves 311 are arranged with top openings on the receiving plate 31, which facilitates the operation personnel to put the limiting rods 32 into the placement grooves 311, and improves the efficiency of pre-fixing the square tube 7. The limiting rods 32 can slide along the receiving plate 31, one end of the limiting rods 32 is arranged on the support plate 22, and every two limiting rods 32 clamp one square tube 7, so as to achieve the purpose of pre-fixing the square tube 7. In order to improve the clamping force of the limiting rods 32 on the square tube 7, the limiting rods 32 are covered with a damping layer on the side, and the damping layer is a thin layer made of damping material, which is not shown in the figure.

[0048] Among them, with reference to Figure 7 、 Figure 8 and Figure 9, four jacking assemblies 8 are arranged in the welding area 5, one jacking assembly 8 corresponds to one pre-locking assembly 3, the jacking assembly 8 comprises a top disc 81 and a plurality of top teeth 82 arranged at intervals on the circumferential side of the top disc 81, the top disc 81 is coaxially welded with the supporting half ring 211, a placing cavity 83 is left between every two top teeth 82, the top teeth 82 are used for jacking the limiting rod 32 into the placing area 4 surrounded by the supporting plate 22; when the limiting rod 32 is not inserted into the placing area 4, the end of the limiting rod 32 away from the supporting plate 22 is located in the placing cavity 83, when the limiting rod 32 pre-fixes the pipe 7, the top disc 81 is rotated, the top teeth 82 gradually push the limiting rod 32 into the placing area 4, so that every two limiting rods 32 clamp the pipe 7, thereby the pipe 7 is pre-positioned, and the bolt 23 is convenient to fix the pipe 7.

[0049] Further, referring to Figure 9 , the top disc 81 comprises a first rotating disc 811 and a second rotating disc 812, the first rotating disc 811 is arranged above the second rotating disc 812 and coaxially arranged with the second rotating disc 812, the first rotating disc 811 is integrally formed with the second rotating disc 812, a plurality of top teeth 82 are welded on the circumferential side of the first rotating disc 811, one top tooth 82 corresponds to one end of the limiting rod 32 away from the supporting plate 22, the circumferential wall of the second rotating disc 812 protrudes from the tooth bottom of the top tooth 82, so that the upper surface of the second rotating disc 812 can support the limiting rod 32, and it is convenient to jack the limiting rod 32 into the placing area 4. A rotating rod 84 is coaxially arranged on the top disc 81, the rotating rod 84 is welded with a plurality of top discs 81, one end of the rotating rod 84 close to the base 1 is rotatably connected with the base 1 through a bearing. The top of the rotating rod 84 is rotated, that is, a plurality of top discs 81 are rotated, thereby the top teeth 82 are rotated, so that the top teeth 82 can push the limiting rod 32 into the placing area 4, further pre-fix the limiting rod 32 to the pipe 7, and it is convenient to lock and fix the pipe 7 by the locking assembly 2, thereby the efficiency of fixing and welding the pipe 7 is improved.

[0050] Referring to Figure 9 , Figure 10When the welding of the square tube 7 is completed, the base 1 and the locking assembly 2 form a locking device, so that the base 1 and the locking assembly 2 can support the grid plate 9, the jacking assembly 8 is taken out from the welding area 5, inserted into the clamping plate 33 from top to bottom, the plug column 34 is inserted into the limiting rod 32, the operator pulls out together with the clamping plate 33 and the receiving plate 31 towards the center axis of the welding area 5, the fixing of the limiting rod 32 to the square tube 7 is released, then the welding area 5 is cleaned, after the pre-locking assembly 3 is cleaned out from the welding area 5, the grid plate 9 is sequentially placed into the groove 11 and the welding of the grid plate 9 is completed, when the grid plate 9 is welded, the support frame 21 and the groove 11 can support and fix the grid plate 9, so that the welding of the grid is completed, and the perpendicularity of the welded grid plate 9 during the welding process is improved, so that the perpendicularity of the grid is improved.

[0051] The implementation principle of the locking device for preventing deformation of the grid welding is as follows: first, the support frame 21 is placed on the base 1 and fixed, then the square tube 7 is sequentially placed into the placing area 4 and the limiting rod 32 is inserted into the placing groove 311, the rotating rod 84 is rotated, so that the top disc 81 drives the top teeth 82 to jacking the limiting rod 32, so that the square tube 7 is pre-fixed in the placing area 4, after pre-fixing, the adjusting bolt 23 is used to reinforce the square tube 7, when reinforcing, the perpendicularity of each square tube 7 is adjusted again, so that the perpendicularity of the grid welding and the welding efficiency are improved; after the welding of the square tube 7 is completed, the jacking assembly 8 and the pre-locking assembly 3 are sequentially taken out from the welding area 5, and the limiting rod 32 is taken out, after the welding area 5 is cleaned, the plurality of grid plates 9 are inserted into the grooves 11, and the grid plates 9 are pre-welded, after pre-welding, the jacking bolt 71 is used to limit the grid plate 9, the jacking bolt 71 tightly presses the grid plate 9, reduces the possibility of deformation of the grid plate 9 caused by high temperature during welding, so as to facilitate the welding of the grid and improve the perpendicularity of the grid.

[0052] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A locking device for preventing deformation during lattice welding, characterized in that: It comprises a base (1), a locking assembly (2) and a pre-locking assembly (3); The base (1) is placed below the locking assembly (2); The locking assembly (2) comprises a support frame (21), a support plate (22) and a plurality of adjusting bolts (23), the support frame (21) is placed above the base (1), the support plate (22) is arranged in the support frame (21) to separate the support frame (21) into a placing area (4) and a welding area (5), the placing area (4) is used for placing the square tube (7), the welding area (5) is used for welding the square tube (7) by the operator, and the plurality of adjusting bolts (23) are in threaded connection with the support plate (22), a fixing area (6) is left between every two adjusting bolts (23), and the square tube (7) is placed in the fixing area (6) to be fixed. The pre-locking assembly (3) is arranged in the welding area (5), the pre-locking assembly (3) comprises a receiving plate (31) and a plurality of limiting rods (32), the receiving plate (31) is arranged on one side of the support plate (22), a plurality of placing grooves (311) are formed in the receiving plate (31), the limiting rods (32) are correspondingly arranged in the placing grooves (311) and can slide along the receiving plate (31), and one end of the limiting rods (32) is arranged on the support plate (22). A plurality of jacking bolts (71) are in threaded connection with the square tube (7) along the height direction of the square tube (7) at intervals, and the jacking direction of the jacking bolts (71) is towards the welding area (5).

2. The locking device for preventing deformation in the welding of a screen according to claim 1, wherein: A plurality of locking assemblies (2) are arranged at intervals along the high edge direction of the square tube (7), and one pre-locking assembly (3) is correspondingly arranged on one locking assembly (2).

3. The locking device for preventing deformation in the welding of a screen according to claim 2, wherein: The support frame (21) is composed of two support half-rings (211), and locking pieces (212) are arranged on the two support half-rings (211), the locking pieces (212) are used for fixing the support half-rings (211).

4. The locking device for preventing deformation in the welding of a screen according to claim 3, wherein: A plurality of jacking assemblies (8) are arranged in the welding area (5), one jacking assembly (8) corresponds to one pre-locking assembly (3), the jacking assembly (8) comprises a top disc (81) and top teeth (82) arranged at intervals on the circumferential side of the top disc (81), the top disc (81) is coaxially arranged with the support half-ring (211), a placing cavity (83) is left between every two adjacent top teeth (82), and the top teeth (82) are used for jacking the limiting rods (32) into the placing area (4) surrounded by the support plate (22).

5. The locking device for preventing deformation in the welding of a screen according to claim 4, wherein: The top disc (81) comprises a first rotating disc (811) and a second rotating disc (812), the first rotating disc (811) is arranged above the second rotating disc (812) and coaxially arranged with the second rotating disc (812), the top teeth (82) are arranged on the circumferential side of the first rotating disc (811), and the circumferential wall of the second rotating disc (812) extends beyond the tooth bottom of the top teeth (82).

6. The locking device for preventing deformation in the welding of a screen according to claim 4, wherein: A rotating rod (84) is coaxially arranged on the top disc (81), the rotating rod (84) is connected with a plurality of top discs (81), and one end of the rotating rod (84) close to the base (1) is in rotational connection with the base (1).

7. The locking device for preventing deformation in the welding of a screen frame according to claim 1, wherein: A plurality of grooves (11) are formed in one end of the base (1) close to the support plate (22), and the grooves (11) are used for placing grid plates (9).

8. The locking device for preventing deformation in the welding of a screen according to claim 1, wherein: The receiving plate (31) is open near the top of the placing groove (311).

9. The locking device for preventing deformation of a screen frame during welding according to claim 8, wherein: The receiving plate (31) is provided with a clamping plate (33), and the clamping plate (33) is provided with a plug column (34) near one end of the limiting rod (32), the plug column (34) is located in the placing groove (311) and is plugged on the limiting rod (32).

10. The locking device for preventing deformation in the welding of a screen according to claim 1, wherein: The limiting rod (32) is covered with a damping layer on the circumference.

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