Tunnel steel arch connecting steel plate welding positioning device

Abstract

The application belongs to the technical field of welding equipment, and particularly relates to a tunnel steel arch connecting steel plate welding positioning device, which comprises side plates, the two side plates being connected through a mounting plate; a positioning assembly is hinged to one side of the side plate, the positioning assembly comprising two hinge plates hinged to the side plate, the two hinge plates being jointly connected with a first positioning plate on one side and jointly connected with a second positioning plate on the other side, the first positioning plate and the second positioning plate being parallel to each other and arranged staggeredly. When the first positioning plate is rotated to be parallel to and aligned with the end of the I-beam, the connecting steel plate is inserted between the first positioning plate and the second positioning plate; when the first positioning plate is rotated to approach the mounting plate, the second positioning plate is rotated to be close to the connecting steel plate outside the end of the I-beam. The positioning assembly does not need to be disassembled throughout the process, can be positioned and fixed at different positions, can stably position and stably weld the I-beam and the connecting steel plate throughout the process, and improves the welding quality and the welding efficiency.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment technology, and in particular relates to a welding positioning device for connecting steel plates of tunnel steel arch frames. Background Technology

[0002] In tunnel construction, steel arch frames are crucial structures for supporting the tunnel walls and preventing collapse. These arch frames are primarily composed of multiple curved I-beams and connecting steel plates. The I-beams are butt-jointed and welded together using the connecting steel plates to form a complete annular arch frame. The I-beam welding employs double-sided welding, with a reinforcing plate welded to each side of the web.

[0003] Existing technologies, such as the patent with publication number CN222078451U, disclose a welding positioning device for tunnel steel arch frames. When welding and fixing I-beams and connecting steel plates, the welding positioning device is installed in the inner groove of the I-beam, with one end flush with the end face of the I-beam. The connecting steel plate is then positioned on the welding positioning device and butt-welded to the I-beam, followed by initial fixing via spot welding. However, in the above-mentioned prior art, the welding positioning device needs to be removed when performing full welding on the I-beam and connecting steel plate. This results in welding generally requiring two separate processes: initial spot welding positioning using the welding positioning device, and full welding after removing the device. This increases the number of steps and reduces efficiency.

[0004] Secondly, after the connecting steel plate and the I-beam are welded together, a reinforcing plate needs to be welded to each side of the web of the I-beam at the welding position. The position of the reinforcing plate is the same as the position where the welding positioning device is installed. Therefore, the welding positioning device must be removed when welding the reinforcing plate, which makes the overall welding process more complicated. In addition, when welding the reinforcing plate, a new welding positioning device needs to be added, which further increases the entire welding process and the number of welding positioning devices required, further limiting the welding efficiency. Summary of the Invention

[0005] To address the technical problems existing in the background art, the present invention provides a welding and positioning device for connecting steel plates of tunnel steel arch frames.

[0006] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0007] A welding and positioning device for connecting steel plates of a tunnel steel arch frame includes two side plates spaced at a fixed distance, which are connected by an mounting plate. The mounting plate has two first slots on its bottom side. The side plates are sleeved on the outside of an I-beam, and the mounting plate is engaged with the upper end of the I-beam through the first slots, with a fixed distance between the side plates and the ends of the I-beam.

[0008] A positioning component is hinged to one side of the side plate, and the positioning component is located at the end of the I-beam. The positioning component includes two hinge plates, which are bent plate structures. The hinge plates are respectively hinged to the side plate. One side of the two hinge plates is connected to a first positioning plate, and the other side is connected to a second positioning plate. The first positioning plate and the second positioning plate are separated by a fixed distance and are parallel to each other and staggered.

[0009] When the first positioning plate is rotated to be parallel and aligned with the end of the I-beam, the connecting steel plate is inserted between the first positioning plate and the second positioning plate, and the three are connected by positioning bolts.

[0010] When the first positioning plate rotates closer to the mounting plate, the second positioning plate rotates in conjunction with it to the outer side of the end of the I-beam until the upper side of the second positioning plate is in close contact with the connecting steel plate.

[0011] Optionally, two mounting plates are provided, with a fixed distance between them. Each mounting plate has a first clamping assembly on its bottom side. The upper reinforcing plate is clamped by the two first clamping assemblies. The upper reinforcing plate is set in the inner groove of the web plates on both sides of the I-beam. The first clamping assembly includes a first pad and a first clamping plate. The first clamping plate is detachably mounted on the side wall of the mounting plate. A first adjusting screw is connected to the first pad. The first adjusting screw is movably mounted in the inner hole of the mounting plate and can perform lifting and rotating movements. The first pad is located on the bottom side of the first clamping plate. The first pad and the first clamping plate are used to clamp the upper reinforcing plate.

[0012] Optionally, the first positioning plate is vertically connected to a first fixing part at its end, and the second positioning plate is vertically connected to a second fixing part at its end; the first fixing part is provided with a first mounting groove, and the first positioning plate is provided with an avoidance groove communicating with the first mounting groove.

[0013] When the first positioning plate is rotated to be parallel and aligned with the end of the I-beam, the first fixing part is rotated to a horizontal state, and the first adjusting screw is fitted on the inner wall of the end of the first mounting groove. The first fixing part and the first adjusting screw are fixedly connected by the first locking nut and the second locking nut.

[0014] When the first positioning plate rotates closer to the mounting plate, it avoids the first adjusting screw through the first mounting groove and the avoidance groove.

[0015] Optionally, a second clamping assembly is detachably provided on the second fixing part. The second clamping assembly includes a second pad and a second clamping plate. The second clamping plate is detachably disposed on the side wall of the fixing seat. A second adjusting screw is connected to the second pad. The second adjusting screw is movably disposed in the inner hole of the fixing seat. The second adjusting screw can perform lifting and rotating movements. The second clamping plate is located on the bottom side of the second pad. The second pad and the second clamping plate are used to clamp the lower reinforcing plate. The lower reinforcing plate is disposed in another inner groove of the web plates on both sides of the I-beam.

[0016] Optionally, the first positioning plate and the second positioning plate each have two through holes corresponding to the connecting holes of the connecting steel plate.

[0017] Optionally, two second slots are provided on the side opposite to the first positioning plate and the second positioning plate. When the first positioning plate is rotated to be parallel and aligned with the end of the I-beam, the first positioning plate is engaged with the upper end of the I-beam through the second slots.

[0018] Optionally, a clamping assembly is provided on the outer side of the side plate. The clamping assembly includes an adjusting seat and a clamping screw threaded inside the adjusting seat. When the upper side of the second positioning plate is in close contact with the connecting steel plate, the clamping screw extends towards the hinge block and abuts against and fixes against the hinge block.

[0019] Optionally, a locking screw is provided on the outer side of the side plate, and the locking screw extends inward and abuts against the side wall of the I-beam.

[0020] Optionally, the first clamping assembly further includes a first guide cylinder, a first washer, and a first adjusting nut. The first guide cylinder is disposed on the upper side of the mounting plate. The first adjusting screw is slidably connected to the first guide cylinder. A first spring is sleeved on the outer side of the first guide cylinder. The bottom end of the first spring is in close contact with the mounting plate, and the other end is in close contact with the first washer. The first washer and the first adjusting nut are disposed on the first adjusting screw from bottom to top.

[0021] Optionally, the second clamping assembly further includes a second guide cylinder, a second washer, and a second adjusting nut. The second guide cylinder is disposed on the bottom side of the fixed base. The second adjusting screw is slidably connected to the second guide cylinder. A second spring is sleeved on the outer side of the second guide cylinder. The upper end of the second spring is in close contact with the fixed base, and the other end is in close contact with the second washer. The second washer and the second adjusting nut are disposed on the second adjusting screw from top to bottom. A second mounting groove is provided on one side of the second fixing part. The second adjusting screw is disposed in the second mounting groove, and the second fixing part and the second adjusting screw are fixedly connected by a third locking nut and a fourth locking nut.

[0022] The present invention has the following advantages and beneficial effects:

[0023] The positioning components are used to position and install the connecting steel plates, facilitating initial welding and fixation after positioning. Then, by adjusting the position of the positioning components, they are repositioned to create space at the contact weld between the connecting steel plates and the I-beam for subsequent full welding. This structure allows for the entire operation without disassembling the positioning components, enabling stable positioning and welding of the connecting steel plates at different locations, thus improving overall efficiency.

[0024] When the first positioning plate is rotated to be parallel and aligned with the end of the I-beam, the connecting steel plate is inserted between the first and second positioning plates. The first and second positioning plates limit the position from the front and rear sides, and the three are connected by positioning bolts, thereby completing the precise positioning and stable connection of the connecting steel plate and ensuring the stability of subsequent welding.

[0025] After the initial welding is completed (which can be achieved through spot welding), remove the positioning bolts to disconnect the connecting steel plate from the first and second positioning plates. Control the first positioning plate to rotate towards the mounting plate, simultaneously rotating the second positioning plate to the outer end of the I-beam until its upper side is flush with the connecting steel plate. At this point, the second positioning plate provides secondary reinforcement to the initially fixed connecting steel plate. Simultaneously, the first and second positioning plates rotate away, leaving the contact weld area between the connecting steel plate and the I-beam open for subsequent full welding. This allows for uninterrupted, smooth, and efficient completion of the entire positioning and welding process without disassembling the positioning components, ensuring welding efficiency and stability. Attached Figure Description

[0026] Figure 1 One of the structural diagrams of the welding positioning device of the present invention, in which a reinforcing plate is clamped and the whole is installed on an I-beam;

[0027] Figure 2 The second structural diagram shows the welding positioning device of the present invention with a reinforcing plate clamped on it and integrally installed on the I-beam.

[0028] Figure 3 for Figure 1 A magnified view of a portion of point a.

[0029] Figure 4 for Figure 2 A magnified view of a section at point b in the middle;

[0030] Figure 5 This is a structural diagram of the welding positioning device of the present invention with a reinforcing plate clamped on it;

[0031] Figure 6 for Figure 5 Front view;

[0032] Figure 7 One of the structural diagrams of the welding positioning device of the present invention is set on an I-beam and clamped with a lower reinforcing plate;

[0033] Figure 8 This is the second structural diagram of the welding positioning device of the present invention, which is mounted on an I-beam and clamps a lower reinforcing plate.

[0034] Figure 9 for Figure 7 Front view;

[0035] Figure 10 This is a structural diagram of the welding positioning device of the present invention, showing the clamping of the upper and lower reinforcing plates.

[0036] Figure 11 This is a structural diagram of the second clamping assembly of the present invention clamping the lower reinforcing plate;

[0037] Figure 12 One of the structural diagrams of the welding positioning device of the present invention, after adjustment, is ready to clamp the connecting steel plate;

[0038] Figure 13 The second structural diagram shows the preparation of the welding positioning device of the present invention for clamping the connecting steel plate after adjustment.

[0039] Figure 14 One of the structural diagrams of the welding positioning device of the present invention is shown for clamping the connecting steel plate after adjustment;

[0040] Figure 15 The second structural diagram shows the clamping of the connecting steel plate after the welding positioning device of the present invention has been adjusted.

[0041] Figure 16 for Figure 14 Front view;

[0042] Figure 17 for Figure 14 Structural diagram viewed from below;

[0043] Figure 18 for Figure 14 Structural diagram from a top-down view;

[0044] Figure 19 A structural diagram showing the clearance welding of the positioning component of the present invention;

[0045] Figure 20 This is one of the structural diagrams of the side plate, mounting plate, and first clamping assembly of the present invention;

[0046] Figure 21 This is the second structural diagram of the side plate, mounting plate, and first clamping assembly of the present invention;

[0047] Figure 22 for Figure 20 Top view;

[0048] Figure 23 for Figure 22 A cross-sectional view along the AA direction;

[0049] Figure 24 This is one of the structural diagrams of the positioning component of the present invention;

[0050] Figure 25 This is the second structural diagram of the positioning component of the present invention;

[0051] Figure 26 for Figure 24 Front view;

[0052] Figure 27 for Figure 26 Top view;

[0053] Figure 28 This is a structural diagram of the connection steel plate, reinforcing plate and I-beam welded together according to the present invention.

[0054] Reference numerals: 1-Side plate, 11-Pin, 12-Locking screw, 13-Mounting plate, 14-First slot, 15-First clamping plate, 151-Limiting groove, 16-First connecting screw, 2-First pad, 21-First adjusting screw, 22-First guide cylinder, 23-First spring, 24-First washer, 25-First adjusting nut, 26-Second locking nut, 27-First locking nut, 3-Hinge plate, 31-Hinge hole, 32-First positioning plate, 321-First positioning bolt, 322-Allowing groove, 323-Second slot, 33-First fixing part, 331-First mounting groove, 3 4-Second positioning plate, 341-Second positioning bolt, 35-Second fixing part, 351-Second mounting groove, 4-Second clamping assembly, 41-Second adjusting screw, 42-Second pad, 43-Fixing seat, 431-Second clamping plate, 432-Second connecting screw, 44-Second guide cylinder, 45-Second spring, 46-Second washer, 47-Second adjusting nut, 48-Third locking nut, 49-Fourth locking nut, 5-Adjusting seat, 51-Second tightening screw, 6-Column, 61-Support, 7-Upper reinforcing plate, 8-Lower reinforcing plate, 9-I-beam, 91-Connecting steel plate, 92-Connecting hole. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0056] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0057] Example 1

[0058] like Figures 1 to 28 As shown, a welding positioning device for connecting steel plates of a tunnel steel arch frame includes two side plates 1 spaced at a fixed distance. The two side plates 1 are connected by a mounting plate 13, so that the mounting plate 13 and the side plates 1 together form a U-shaped mounting frame. The distance between the two side plates 1 is slightly larger than the width of the H-beam 9, which facilitates the side plates 1 to be smoothly inserted into the outer perimeter of the H-beam 9. Two first slots 14 are provided on the bottom side of the mounting plate 13. The side plates 1 are fitted onto the outer side of the H-beam 9, and the mounting plate 13 is engaged with the upper end of the H-beam 9 through the first slots 14, so that the side plates 1 and the mounting plate 13 can be installed as a whole on the H-beam 9. The ends of the side plates 1 and the H-beam 9 are at a fixed distance, ensuring that the butt joint position of the H-beam 9 and the connecting steel plate 91 is made available, providing space for welding, so that the side plates 1 and the mounting plate 13 do not need to be disassembled during the welding operation.

[0059] like Figures 1 to 27 As shown, a positioning component is hinged to one side of the side plate 1. The positioning component is located at the end of the I-beam 9, and the connecting steel plate 91 is positioned and installed at the end of the I-beam 9. The connecting steel plate 91 is welded to the I-beam 9 as a whole. Therefore, the positioning component is used to position and install the connecting steel plate 91, and the design position of the positioning component is on the side close to the connecting steel plate 91.

[0060] like Figure 1 and Figure 2 As shown, the arc-shaped I-beam 9 is placed on the supports 61 of multiple columns 6, ensuring that the groove surface of the I-beam 9 faces the upper and lower sides. Then, the welding positioning device of the present invention is installed at the end position of the I-beam 9.

[0061] like Figures 1 to 27 As shown, the positioning assembly includes two hinge plates 3, which are bent plate structures, roughly V-shaped, and are hinged to the side plate 1. Specifically, a pin 11 is provided on the side plate 1, and a hinge hole 31 is provided at the middle bend of the hinge plate 3. The hinge plate 3 is rotatably mounted on the pin 11 through the hinge hole 31. A first positioning plate 32 is connected to one side of the two hinge plates 3, and a second positioning plate 34 is connected to the other side. The first positioning plate 32 is limited above the side plate 1, and the second positioning plate 34 is located below.

[0062] like Figure 14 As shown, the first positioning plate 32 and the second positioning plate 34 are spaced a fixed distance apart. The first positioning plate 32 and the second positioning plate 34 are parallel to each other and staggered. The horizontal distance between the first positioning plate 32 and the second positioning plate 34 is slightly greater than the width of the connecting steel plate 91, so that the connecting steel plate 91 can be placed between the two for positioning and installation.

[0063] like Figure 14 and Figure 15 As shown, when the first positioning plate 32 is rotated to be parallel and aligned with the end of the I-beam 9, the connecting steel plate 91 is inserted between the first positioning plate 32 and the second positioning plate 34, and the three are connected by positioning bolts, thereby completing the precise positioning and stable connection of the connecting steel plate 91 and ensuring the stability of subsequent welding. At this time, there is a sufficient gap between the hinge plate 3 and the connecting steel plate 91, namely the welding gap A area, from which spot welding can be performed to achieve the initial fixation of the connecting steel plate 91 and the I-beam 9.

[0064] like Figure 16 As shown, when the first positioning plate 32 rotates closer to the mounting plate 13, the second positioning plate 34 rotates in conjunction with it to the outer side of the end of the I-beam 9 until the upper side of the second positioning plate 34 is in close contact with the connecting steel plate 91. This allows the second positioning plate 34 to abut and fix the connecting steel plate 91 while the first positioning plate 32 and the second positioning plate 34 rotate to make room. This provides space for welding operations without disassembling the welding positioning device, and the positioning components can be used to fix the connecting steel plate 91 while making room, further increasing the stability of the welding.

[0065] After the initial welding is completed (which can be achieved through spot welding), the positioning bolts are removed, disconnecting the connecting steel plate 91 from the first positioning plate 32 and the second positioning plate 34. As the first positioning plate 32 rotates closer to the mounting plate 13, the second positioning plate 34 rotates in conjunction with it to the outer end of the I-beam 9, until the upper side of the second positioning plate 34 is in close contact with the connecting steel plate 91. At this point, the second positioning plate 34 provides secondary reinforcement and fixation to the initially fixed connecting steel plate 91. Simultaneously, the first positioning plate 32 and the second positioning plate 34 rotate and move apart, leaving the contact weld area between the connecting steel plate 91 and the I-beam 9 open for subsequent full welding. This allows for uninterrupted, smooth, and efficient completion of the entire positioning and welding process without disassembling the positioning components, ensuring welding efficiency and stability.

[0066] At this point, the hinge plate 3 rotates, covering the original welding gap A area, and moves aside on the upper and lower sides to form a new welding gap B area, from which full welding can be performed. Figure 17 and Figure 18As shown, similarly, at this time, the positioning component completes the avoidance, and the space above and below is vacated, forming a new welding gap D area, from which full welding can be performed.

[0067] The first positioning plate 32 and the second positioning plate 34 have sufficient clearance in the vertical direction to ensure that they can rotate at a certain angle to meet the needs of multiple functions.

[0068] like Figure 16 As shown, at this time, the first positioning plate 32 rotates clockwise to the limit position, so that the upper end of the second positioning plate 34 is in close contact with the side wall of the connecting steel plate 91 to achieve positioning.

[0069] like Figure 3 and Figure 4 As shown, at this time, the first positioning plate 32 rotates clockwise, but does not rotate to the limit position, so that the second positioning plate 34 is located on the outside of the end of the I-beam 9. At this time, the welding positioning device can be installed as a whole, and the entire device can be smoothly installed on the I-beam 9. In other words, the second positioning plate 34 rotates to avoid providing installation space, so as to avoid interference and collision between the second positioning plate 34 and the I-beam 9 during the installation of the entire device.

[0070] like Figures 7-10 As shown, at this time, the first positioning plate 32 rotates counterclockwise, but does not rotate to the limit position. The second positioning plate 34 is adjusted to be located on the bottom side of the obliquely lower end of the I-beam 9, so that the lower reinforcing plate 8 can be installed, providing space for the installation of the lower reinforcing plate 8.

[0071] like Figures 12-15 As shown, at this time, the first positioning plate 32 rotates counterclockwise to its limit position, and then rotates to a vertical position. The second positioning plate 34 is adjusted to a vertical position on the outer side of the end of the I-beam 9. Under the linkage, the reinforcing plate 8 rotates into the inner groove of the I-beam 9 to complete the positioning and installation. At the same time, the entire device completes the position adjustment and positioning, and the connecting steel plate 91 can be installed.

[0072] like Figures 16-19 As shown, after the initial positioning of the connecting steel plate 91 is completed, the connecting steel plate 91 and the I-beam 9 are fixed by spot welding or other methods. Then, the first positioning plate 32 can be rotated again, clockwise to its limit position, so that the upper end of the second positioning plate 34 is tightly attached to the side wall of the connecting steel plate 91 for positioning. The entire positioning assembly (first positioning plate 32, second positioning plate 34, etc.) is rotated away from the mating position of the connecting steel plate 91 and the I-beam 9 to create space for welding, allowing for full welding of the contact gap between the connecting steel plate 91 and the I-beam 9. The final structure of the welded I-beam 9, connecting steel plate 91, and reinforcing plate is as follows. Figure 28 As shown.

[0073] This structure allows for the entire operation without disassembling the positioning components, and utilizes the positioning components to fix the connecting steel plate 91 at different positions, enabling stable positioning and welding of the I-beam 9 and the connecting steel plate 91 throughout the entire process, while improving overall efficiency.

[0074] Example 2

[0075] like Figures 1 to 27 As shown, two mounting plates 13 are provided, spaced a fixed distance apart. The gap between the mounting plates 13 is the position of the upper reinforcing plate 7, ensuring that welding operations can be performed from this gap to weld the upper reinforcing plate 7 to the I-beam 9. Each mounting plate 13 has a first clamping assembly on its bottom side. The upper reinforcing plate 7 is clamped by two of the first clamping assemblies and is positioned in the inner grooves of the web plates on both sides of the I-beam 9.

[0076] like Figures 20-24 As shown, the first clamping assembly includes a first pad 2 and a first clamping plate 15. The first clamping plate 15 is detachably mounted on the side wall of the mounting plate 13 via a first connecting screw 16. A first adjusting screw 21 is connected to the first pad 2, and the first adjusting screw 21 is movably disposed in the inner hole of the mounting plate 13. The first adjusting screw 21 can perform lifting and rotating movements. The first pad 2 is located on the bottom side of the first clamping plate 15, and an L-shaped limiting groove 151 is provided on the inner side of the first clamping plate 15 to achieve limiting clamping of the upper reinforcing plate 7. The first pad 2 and the first clamping plate 15 are used to clamp the upper reinforcing plate 7. Before the entire device is installed on the I-beam 9, the upper reinforcing plate 7 needs to be clamped first. After clamping the upper reinforcing plate 7 using the first pad 2 and the first clamping plate 15, the entire device is then installed on the I-beam 9, thus completing the positioning and installation of the upper reinforcing plate 7. Then, it can be welded to the I-beam 9. When disassembling the welding positioning device later, rotate the first adjusting screw 21 to make the first pad 2 rotate and disengage from the upper reinforcing plate 7. After the connection between the first clamping assembly and the upper reinforcing plate 7 is released, the entire device can be lifted up for disassembly.

[0077] like Figures 1 to 27 As shown, a first fixing part 33 is vertically connected to the end of the first positioning plate 32, and a second fixing part 35 is vertically connected to the end of the second positioning plate 34. A first mounting groove 331 is provided on the first fixing part 33, and a clearance groove 322 communicating with the first mounting groove 331 is provided on the first positioning plate 32. One end of the clearance groove 322 passes through the first positioning plate 32, and the opening gradually decreases in the direction towards the first mounting groove 331.

[0078] like Figure 12 and Figure 14As shown, when the first positioning plate 32 rotates to be parallel and aligned with the end of the I-beam 9, the first fixing part 33 rotates to a horizontal state, and the first adjusting screw 21 is fitted onto the inner wall of the end of the first mounting groove 331. That is, when the first positioning plate 32 rotates counterclockwise to its limit position, it is blocked and limited by the first adjusting screw 21. The first adjusting screw 21 is precisely fitted onto the end of the first mounting groove 331, thereby realizing the positioning plate rotating to a vertical state and accurately positioning and fixing it. The first fixing part 33 and the first adjusting screw 21 are fixedly connected by the first locking nut 27 and the second locking nut 26. The first locking nut 27 is set close to the upper end face of the first fixing part 33, and the second locking nut 26 is set close to the lower end face of the first fixing part 33, thereby completing a reliable locking and fixing.

[0079] When the first positioning plate 32 rotates closer to the mounting plate 13, it avoids the first adjusting screw 21 through the first mounting groove 331 and the avoidance groove 322. The design of the first mounting groove 331 and the avoidance groove 322 ensures that the first positioning plate 32 will not collide with the first adjusting screw 21 when it rotates, thereby realizing the position adjustment of the positioning component.

[0080] like Figures 8-11 As shown, a second clamping assembly 4 is detachably mounted on the second fixing part 35. The second clamping assembly 4 includes a second pad 42 and a second clamping plate 431. The second clamping plate 431 is detachably mounted on the side wall of the fixing seat 43 via a second connecting screw 432. A second adjusting screw 41 is connected to the second pad 42. The second adjusting screw 41 is movably mounted in the inner hole of the fixing seat 43 and can perform lifting and rotating movements. The second clamping plate 431 is located on the bottom side of the second pad 42. The second pad 42 and the second clamping plate 431 are used to clamp the lower reinforcing plate 8. The lower reinforcing plate 8 is mounted in another inner groove of the web plates on both sides of the I-beam 9.

[0081] Before clamping the lower reinforcing plate 8, the upper reinforcing plate 7 must be clamped first. After clamping the upper reinforcing plate 7 using the first pad 2 and the first clamping plate 15, the entire device is then installed on the I-beam 9, completing the positioning and installation of the upper reinforcing plate 7. Then, the lower reinforcing plate 8 is installed. This is because if the lower reinforcing plate 8 is clamped first, the entire device cannot be installed and fixed on the I-beam 9. Figure 10As shown, when the first positioning plate 32 and the second positioning plate 34 are rotated clockwise to an inclined state, the second fixing part 35 is located on the bottom side of the I-beam 9, and the lower reinforcing plate 8 can be clamped at the position of the second fixing part 35. When the first positioning plate 32 returns to the vertical state, the lower reinforcing plate 8, which is clamped in conjunction with the first positioning plate, rotates and is inserted into the inner groove of the I-beam 9, automatically achieving positioning and installation. When disassembling the welding positioning device later, the second clamping assembly 4 needs to be disassembled first. By rotating the second adjusting screw 41, the second pad 42 is rotated and disengaged from the upper reinforcing plate 7. After disconnecting the second clamping assembly 4 from the lower reinforcing plate 8, the second clamping assembly 4 can be completely disassembled from the second fixing part 35. Then the welding positioning device can be disassembled.

[0082] like Figure 12 and Figure 13 As shown, at this point, both the upper reinforcing plate 7 and the lower reinforcing plate 8 are installed in place, as... Figure 14 As shown, after the upper reinforcing plate 7 and the lower reinforcing plate 8 are installed in place, the connecting steel plate 91 is installed; finally, welding begins. First, the upper reinforcing plate 7 and the lower reinforcing plate 8 are welded to the I-beam 9, then the second clamping assembly 4 is removed. After the second clamping assembly 4 is removed, the connecting steel plate 91 and the I-beam 9 are initially fixed by spot welding; then the position of the positioning assembly is adjusted to leave welding space (e.g., ...). Figures 16-18 (As shown), and perform full welding to complete the welding operation of connecting steel plate 91 and I-beam 9.

[0083] In this invention, the first positioning plate 32 and the second positioning plate 34 each have two through holes corresponding to the connecting holes 92 of the connecting steel plate 91. The first positioning plate 32 is provided with a first positioning bolt 321, and the second positioning plate 34 is provided with a second positioning bolt 341. The connecting steel plate 91 has its own connecting holes 92. The connection is achieved by opening corresponding through holes on the first positioning plate 32 and the second positioning plate 34, and by using the first positioning bolt 321 and the second positioning bolt 341.

[0084] In this invention, two second slots 323 are provided on the opposite side of the first positioning plate 32 and the second positioning plate 34. When the first positioning plate 32 is rotated to be parallel and aligned with the end of the I-beam 9, the first positioning plate 32 is engaged with the upper end of the I-beam 9 through the second slots 323. This achieves the positioning of the first positioning plate 32, ensuring that the connecting steel plate 91 can be accurately positioned and installed.

[0085] like Figure 19 As shown, in this invention, a clamping assembly is provided on the outer side of the side plate 1. The clamping assembly includes an adjusting seat 5 and a clamping screw 51 threaded inside the adjusting seat 5. When the upper side of the second positioning plate 34 is in close contact with the connecting steel plate 91, the clamping screw 51 extends towards the hinge block and abuts against the hinge block to ensure that the second positioning plate 34 can reliably clamp the connecting steel plate 91.

[0086] like Figure 20 As shown, a locking screw 12 is provided on the outer side of the side plate 1. The locking screw 12 extends inward and abuts against the side wall of the I-beam 9, thereby fixing the entire welding positioning device on the I-beam 9.

[0087] like Figures 20-23 As shown, the first clamping assembly also includes a first guide cylinder 22, a first washer 24, and a first adjusting nut 25. The first guide cylinder 22 is disposed on the upper side of the mounting plate 13. The bottom section of the first adjusting screw 21 is unthreaded, and the unthreaded section of the first adjusting screw 21 is slidably connected to the first guide cylinder 22. A first spring 23 is sleeved on the outer side of the first guide cylinder 22. The bottom end of the first spring 23 is in close contact with the mounting plate 13, and the other end is in close contact with the first washer 24. The first washer 24 and the first adjusting nut 25 are disposed on the first adjusting screw 21 from bottom to top. By rotating the first adjusting nut 25, the first spring 23 is compressed, thereby bringing the first pad 2 closer to the first clamping plate 15 and clamping the upper reinforcing plate 7.

[0088] like Figures 8-11 As shown, the second clamping assembly 4 has a similar structure to the first clamping assembly. The second clamping assembly 4 also includes a second guide cylinder 44, a second washer 46, and a second adjusting nut 47. The second guide cylinder 44 is disposed on the bottom side of the fixed base 43. The upper section of the second adjusting screw 41 is unthreaded, and the unthreaded section of the second adjusting screw 41 is slidably connected to the second guide cylinder 44. A second spring 45 is sleeved on the outer side of the second guide cylinder 44. The upper end of the second spring 45 is in close contact with the fixed base 43, and the other end is in close contact with the second washer 46. The second washer 46 and the second adjusting nut 47 are disposed on the second adjusting screw 41 from top to bottom. By rotating the second adjusting nut 47, the second spring 45 is compressed, allowing the second pad 42 to approach the second clamping plate 431 and clamping the lower reinforcing plate 8.

[0089] like Figures 8-11 As shown, a second mounting groove 351 is provided on one side of the second fixing part 35, and one side of the second mounting groove 351 extends through the end of the second fixing part 35. The second adjusting screw 41 is disposed in the second mounting groove 351, and the second fixing part 35 and the second adjusting screw 41 are fixedly connected by a third locking nut 48 and a fourth locking nut 49. The third locking nut 48 is disposed close to the upper end face of the second fixing part 35, and the fourth locking nut 49 is disposed close to the lower end face of the second fixing part 35, thereby completing a reliable locking and fixing.

[0090] like Figure 28As shown, the ends of the I-beam 9 are welded with connecting steel plates 91, and reinforcing plates are welded to the upper and lower inner grooves of the webs on both sides of the I-beam 9, with a fixed interval between the reinforcing plates and the connecting steel plates 91. Based on actual welding process requirements, this invention designs a welding positioning device for positioning the connecting steel plates 91 and the reinforcing plates. This device allows for precise positioning and installation of the connecting steel plates 91 and the reinforcing plates, and welding can be performed directly after positioning without disassembling the welding positioning device, achieving a one-time clamping and full-process welding workflow. During welding, only the position of the positioning components needs to be adjusted to meet the requirements of initial spot welding and full welding, ensuring both welding efficiency and stable clamping and positioning throughout the welding process, thus guaranteeing welding quality.

[0091] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A welding and positioning device for connecting steel plates of a tunnel steel arch frame, characterized in that: It includes two side plates spaced at a fixed distance, which are connected by a mounting plate; the mounting plate has two first slots on its bottom side; the side plates are sleeved on the outside of the I-beam, and the mounting plate is engaged with the upper end of the I-beam through the first slots, and the side plates are at a fixed distance from the ends of the I-beam; A positioning component is hinged to one side of the side plate, and the positioning component is located at the end of the I-beam. The positioning component includes two hinge plates, which are bent plate structures. The hinge plates are respectively hinged to the side plate. One side of the two hinge plates is connected to a first positioning plate, and the other side is connected to a second positioning plate. The first positioning plate and the second positioning plate are separated by a fixed distance and are parallel to each other and staggered. When the first positioning plate is rotated to be parallel and aligned with the end of the I-beam, the connecting steel plate is inserted between the first positioning plate and the second positioning plate, and the three are connected by positioning bolts. When the first positioning plate rotates closer to the mounting plate, the second positioning plate rotates in conjunction with it to the outer side of the end of the I-beam until the upper side of the second positioning plate is in close contact with the connecting steel plate. The mounting plate consists of two pieces, spaced a fixed distance apart. Each mounting plate has a first clamping assembly on its bottom side. The upper reinforcing plate is clamped by the two first clamping assemblies and is located in the inner grooves of the web plates on both sides of the I-beam. The first clamping assembly includes a first pad and a first clamping plate. The first clamping plate is detachably mounted on the side wall of the mounting plate. A first adjusting screw is connected to the first pad and is movably mounted in the inner hole of the mounting plate. The first adjusting screw can move up, down, and rotate. The first pad is located on the bottom side of the first clamping plate. The first pad and the first clamping plate are used to clamp the upper reinforcing plate. The first positioning plate has a first fixing part vertically connected to its end, and the second positioning plate has a second fixing part vertically connected to its end; the first fixing part has a first mounting groove, and the first positioning plate has a clearance groove communicating with the first mounting groove. When the first positioning plate is rotated to be parallel and aligned with the end of the I-beam, the first fixing part is rotated to a horizontal state, and the first adjusting screw is fitted on the inner wall of the end of the first mounting groove. The first fixing part and the first adjusting screw are fixedly connected by the first locking nut and the second locking nut. When the first positioning plate rotates closer to the mounting plate, it avoids the first adjusting screw through the first mounting groove and the clearance groove; The second fixing part is detachably provided with a second clamping assembly, which includes a second pad and a second clamping plate. The second clamping plate is detachably disposed on the side wall of the fixing seat. A second adjusting screw is connected to the second pad. The second adjusting screw is movably disposed in the inner hole of the fixing seat and can perform lifting and rotating movements. The second clamping plate is located on the bottom side of the second pad. The second pad and the second clamping plate are used to clamp the lower reinforcing plate. The lower reinforcing plate is disposed in another inner groove of the web plates on both sides of the I-beam.

2. The tunnel steel arch frame connecting steel plate welding positioning device according to claim 1, characterized in that: The first positioning plate and the second positioning plate each have two through holes corresponding to the connecting holes of the connecting steel plate.

3. The tunnel steel arch frame connecting steel plate welding positioning device according to claim 1, characterized in that: Two second slots are provided on the side opposite to the first positioning plate and the second positioning plate. When the first positioning plate is rotated to be parallel and aligned with the end of the I-beam, the first positioning plate is engaged with the upper end of the I-beam through the second slots.

4. The tunnel steel arch frame connecting steel plate welding positioning device according to claim 1, characterized in that: A clamping assembly is provided on the outer side of the side plate. The clamping assembly includes an adjusting seat and a clamping screw threaded inside the adjusting seat. When the upper side of the second positioning plate is in close contact with the connecting steel plate, the clamping screw extends towards the hinge block and abuts against and fixes against the hinge block.

5. The tunnel steel arch frame connecting steel plate welding positioning device according to claim 1, characterized in that: A locking screw is provided on the outer side of the side plate, and the locking screw extends inward and abuts against the side wall of the I-beam.

6. The tunnel steel arch frame connecting steel plate welding positioning device according to claim 1, characterized in that: The first clamping assembly further includes a first guide cylinder, a first washer, and a first adjusting nut. The first guide cylinder is disposed on the upper side of the mounting plate. The first adjusting screw is slidably connected to the first guide cylinder. A first spring is sleeved on the outer side of the first guide cylinder. The bottom end of the first spring is in close contact with the mounting plate, and the other end is in close contact with the first washer. The first washer and the first adjusting nut are disposed on the first adjusting screw from bottom to top.

7. The tunnel steel arch frame connecting steel plate welding positioning device according to claim 1, characterized in that: The second clamping assembly further includes a second guide cylinder, a second washer, and a second adjusting nut. The second guide cylinder is disposed on the bottom side of the fixed base. The second adjusting screw is slidably connected to the second guide cylinder. A second spring is sleeved on the outer side of the second guide cylinder. The upper end of the second spring is in close contact with the fixed base, and the other end is in close contact with the second washer. The second washer and the second adjusting nut are disposed on the second adjusting screw from top to bottom. A second mounting groove is provided on one side of the second fixing part. The second adjusting screw is disposed in the second mounting groove, and the second fixing part and the second adjusting screw are fixedly connected by a third locking nut and a fourth locking nut.

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