Arch welding equipment for tunnel construction

Abstract

The invention relates to the technical field of tunnel lagging jack welding, and discloses lagging jack welding equipment for tunnel construction, which comprises a placing plate, arc-shaped I-shaped steel, a butt-joint steel plate and supporting columns fixedly mounted on the periphery of the bottom of the placing plate, and further comprises a limiting assembly arranged on one side of the interior of the placing plate, positioning assemblies are symmetrically arranged on one side of the front face and one side of the back face of the containing plate, each limiting assembly comprises a moving unit and a locking unit, each moving unit comprises a mounting groove formed in the top of the containing plate in parallel, a linear guide rail is fixedly mounted in each mounting groove, and a sliding block is fixedly mounted at the output end of each linear guide rail; the problems that the device does not limit the top face of the profile steel, so that the profile steel possibly tilts or deviates along the arc-shaped track of the profile steel during welding, and the welding precision and the welding stability of the profile steel and connecting steel plates at the two ends are reduced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel arch welding, in particular to an arch welding device used for tunnel construction. Background Art

[0002] In the process of tunnel construction, structural components of steel arch frames are needed. The steel arch frames are mainly composed of I-beams and connecting steel plates. In the prior art, the I-beams and the connecting steel plates need to be welded and fixed.

[0003] For example, a tunnel construction steel arch welding installation device with announcement number CN221773829U includes a supporting platform, a support column is installed at one end of the bottom of the supporting platform, and two L-shaped positioning base plates are installed at the other end. A sliding support plate is slidably installed on the upper length direction of the supporting platform, and a steel clamping and positioning mechanism is installed on the sliding support plate. A connecting plate positioning mechanism is slidably installed in the vertical direction of the two L-shaped positioning base plates. The utility model fixes the steel body of the steel arch frame on the sliding support plate through the steel clamping and positioning mechanism, and then rotatably clamps the connecting plate at the two end heads of the steel through the connecting plate positioning mechanism. The movement of the sliding support plate, the movement of the adjusting slider, the lifting and lowering of the lifting platform and the rotation of the clamping assembly can be used to adjust the height of the lifting platform. The connecting plate and the steel body are stably positioned at the optimal position, which is suitable for steel arch frame units of different shapes, improves the accuracy of connecting plate docking, and improves the bearing capacity of the steel arch frame. However, the device limits the steel section by four first limiting screws, and does not limit the top surface of the steel section. Since the steel arch frame is very easy to twist or warp during the steel section processing, the steel section may be lifted or deviated along its own arc trajectory during welding, which reduces the welding accuracy and welding stability of the steel section and the connecting steel plates at both ends, affecting the quality of the welded product. In addition, the fitting surface between the connecting steel plate of the device and the steel section is small, which may result in low docking stability or the steel section squeezing the connecting steel plate, thereby reducing the accuracy of the docking installation.

[0004] Therefore, an arch welding device for tunnel construction is proposed to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide an arch welding device for tunnel construction to solve the problem that the device fails to limit the top surface of the steel section, so that the steel section may be warped or deviated along its own arc trajectory during welding, thereby reducing the welding accuracy and welding stability of the steel section and the connecting steel plates at both ends.

[0006] To achieve the above object, the present invention provides the following technical solutions: an arch welding device for tunnel construction, comprising a placement plate, an arc-shaped I-beam, a butt steel plate and support columns fixedly installed around the bottom of the placement plate;

[0007] Also includes:

[0008] A limiting component is arranged on one inner side of the placement plate, and positioning components are symmetrically arranged on the front and back sides of the placement plate;

[0009] The limit assembly includes a moving unit and a locking unit, the moving unit includes a mounting groove parallel to the top of the placement plate, a linear guide is fixedly installed inside the mounting groove, and a sliding block is fixedly installed at the output end of the linear guide;

[0010] The locking unit comprises a sliding rod vertically slidably mounted inside the sliding block, an extrusion block is fixedly connected to the outside of the sliding rod, two moving plates are symmetrically slidably mounted on the top of the sliding block, an inclined block is fixedly connected to the outside of the right moving plate, and the extrusion block abuts against the inclined block;

[0011] A clamping plate is rotatably mounted on the top of the movable plate, a pressing plate is slidably mounted on one side of the clamping plate, a fixing cover is fixedly connected to the top of the sliding block, and a circular ring is fixedly connected to the outer side of the sliding rod.

[0012] Preferably, an L-shaped plate is fixedly connected to the middle of the top of the placement plate, an electric push rod is fixedly installed on the inner side of the L-shaped plate, there are no less than two electric push rods, the telescopic ends of the two electric push rods are fixedly connected to the same clamping plate, there are no less than three mounting grooves, a sliding groove is opened on the top side of the sliding block, and a bottom rod is fixedly connected laterally to the lower part of the sliding groove.

[0013] By adopting the above technical scheme, the pressure plate is pressed on the top surface of the arc-shaped I-beam, the clamping plate is pressed against the two sides of the arc-shaped I-beam, and the upper part of the fitting groove and the interior of the fixing cover is in a negative pressure state, thereby improving the adsorption and clamping effect of the clamping plate on the arc-shaped I-beam, reducing the slippage and warping of the arc-shaped I-beam after positioning, and improving the welding accuracy.

[0014] Preferably, the two movable plates are symmetrically slidably installed on the outer side of the bottom rod, and a spring 1 is sleeved on the outer side of the bottom rod, and the two ends of the spring 1 are respectively fixedly connected to the two movable plates, and the top of the movable plate is fixedly connected to the top of the movable plate, and the top of the rotating shaft is rotatably connected to the bottom of the clamping plate, and a torsion spring is sleeved on the outer side of the rotating shaft, and the two ends of the torsion spring are respectively fixedly connected to the movable plate and the clamping plate.

[0015] By adopting the above technical solution, the descending of the sliding rod will stretch spring 2 and drive the extrusion block to descend, the extrusion block squeezes the inclined block, the inclined block drives the movable plate on the right to move, the two movable plates approach each other, the movable plate drives the rotating shaft and the clamping plate to move, and the clamping plate drives the clamping plate to move.

[0016] Preferably, a vertical groove is formed in the other side of the top of the sliding block. The sliding rod and the extrusion block are both slidably connected to the vertical groove. A second spring is sleeved on the lower part of the outer side of the sliding rod. The two ends of the second spring are respectively fixedly connected to the bottom of the sliding block and the bottom end of the sliding rod. A pressing plate is slidably connected to the outer side of the sliding rod. The pressing plate is located above the clamping plate. A third spring is sleeved on the upper outer side of the sliding rod. The two ends of the third spring are respectively fixedly connected to the top end of the sliding rod and the top of the pressing plate.

[0017] By adopting the above technical solution, the right moving plate drives the lower toothed plate to move, the lower toothed plate drives the gear to rotate, the gear drives the upper toothed plate and the left moving plate to move, and the two moving plates slide on the bottom rod and compress the first spring.

[0018] Preferably, a gear is rotatably connected to the upper part inside the sliding groove. An upper toothed plate is fixedly connected to the upper part of one side of the left moving plate. A lower toothed plate is fixedly connected to the lower part of the side of the right moving plate close to the gear. The upper toothed plate and the lower toothed plate are both meshed with the gear. A fixed cover is further fixedly connected to the other side of the top of the sliding block. The sliding rod is slidably connected to the fixed cover.

[0019] By adopting the above technical solution, when the fitting groove fits with the arc-shaped I-beam, the inside above the fitting groove, the connecting hose and the fixed cover is in a sealed state.

[0020] Preferably, the ring is in contact with the inner wall of the fixed cover and is slidably connected to the fixed cover. A side groove is formed in the side of the clamping plate close to the pressing plate. A fourth spring is fixedly installed inside the side groove. There are at least two fourth springs. The fourth spring is fixedly connected to the pressing plate. The pressing plate is slidably connected to the side groove. A fitting groove is formed in the side of the pressing plate away from the clamping plate. A connecting hose is connected between the fitting groove and the fixed cover. The fitting groove is communicated with the inside of the fixed cover through the connecting hose.

[0021] By adopting the above technical solution, the pressing plate can slide into the side groove. When the pressing plate does not move, the clamping plate can continue to move.

[0022] Preferably, the positioning assembly includes symmetrically arranged fixing plates. The fixing plates are fixedly connected to the placing plate. An adjusting screw rod is rotatably connected between the two fixing plates. A cross plate is threadedly connected to the outer side of the adjusting screw rod. One side of the cross plate is in contact with the placing plate.

[0023] By adopting the above technical solution, move the cross plate to the position below the end of the arc-shaped I-beam, then press and dock the docking steel plate with the arc-shaped I-beam, and keep the docking steel plate between the two pressing screw rods.

[0024] Preferably, rotating plates are symmetrically installed on the top of the cross plate. The rotating plates are rotatably connected to the cross plate. Pressing screw rods are horizontally threadedly connected inside the rotating plates.

[0025] By adopting the above technical solution, rotate the two tightening screws, and the tightening screws drive the tightening plates to press against both sides of the butt joint steel plate, facilitating the positioning of the butt joint steel plate.

[0026] Preferably, one side of the tightening screw is fixedly connected with a tightening plate, and the outer side of one side of the rotating plate is fixedly connected with an auxiliary plate, and the auxiliary plate is perpendicular to the rotating plate.

[0027] By adopting the above technical solution, the auxiliary plate fits with the arc-shaped I-beam, facilitating the accurate positioning and butt joint of the arc-shaped I-beam and the butt joint steel plate, and welding is carried out by an external power arm welding robot.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. A limiting component is provided. The operator places the arc-shaped I-beam on the top of the placing plate and between two adjacent pressing plates. Start the electric push rod to work. The electric push rod drives the pressing plate to press down. The pressing plate drives the sliding rod to descend. The sliding rod compresses the third spring and drives the pressing plate to press down, so that the pressing plate presses on the top surface of the arc-shaped I-beam. When the sliding rod descends, it will stretch the second spring and drive the extrusion block to descend. The extrusion block squeezes the inclined block, and the inclined block drives the moving plate on the right side to move. The moving plate on the right side drives the lower toothed plate to move. The lower toothed plate drives the gear to rotate. The gear drives the upper toothed plate and the moving plate on the left side to move. The two moving plates slide on the bottom rod and compress the first spring, so that the two moving plates approach each other. The moving plate drives the rotating shaft and the clamping plate to move. The clamping plate drives the pressing plate to move, so that the pressing plate presses against both sides of the arc-shaped I-beam. The fitting groove fits with the arc-shaped I-beam. The upper part inside the fitting groove, the connecting hose and the fixed cover is in a sealed state;

[0030] 2. At this time, the sliding rod continues to press down, the pressing plate does not move, the clamping plate continues to move, the sliding rod drives the ring to descend, so that the volume of the upper part inside the fixed cover increases, facilitating the upper part inside the fitting groove and the fixed cover to be in a negative pressure state until the fourth spring is completely compressed, thereby improving the adsorption and pressing effect of the pressing plate on the arc-shaped I-beam. The clamping plate is rotatably connected to the rotating shaft, facilitating the inclination of the clamping plate and the pressing plate, so as to adapt to the arc of the arc-shaped I-beam for clamping. Through the pressing of the pressing plates at multiple points and the adsorption of the fitting groove, combined with the downward limiting of the pressing plate, the sliding and warping of the arc-shaped I-beam after positioning are reduced, and the welding accuracy is improved. The pressing plate can rotate on the outer side of the sliding rod, thereby removing the blockage of the arc-shaped I-beam and facilitating the removal of the arc-shaped I-beam after welding is completed, solving the problem that the device does not limit the top surface of the profiled steel, resulting in the possible warping or deviation of the profiled steel along its own arc trajectory during welding, reducing the welding accuracy and welding stability between the profiled steel and the connecting steel plates at both ends;

[0031] 3. A positioning component is provided. After the arc-shaped I-beam is positioned, the operator first rotates the adjusting screw rod to move the cross plate to the position below the end of the arc-shaped I-beam. Then, the butt joint steel plate is pressed against the arc-shaped I-beam for butt joint. The butt joint steel plate is kept between the two tightening screw rods. The tightening screw rods are threadedly connected to the rotating plate. Rotate the two tightening screw rods, and the tightening screw rods drive the tightening discs to press both sides of the butt joint steel plate. And at this time, the auxiliary plate is attached to the arc-shaped I-beam, which is convenient for accurately positioning and butting the arc-shaped I-beam and the butt joint steel plate. Then, welding can be carried out through an external power arm welding robot. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the three-dimensional overall structure of the present invention;

[0033] Figure 2 Schematic diagram of the installation structure of the L-shaped plate of the present invention;

[0034] Figure 3 For the present invention Figure 2 Enlarged structure schematic diagram at A in the present invention;

[0035] Figure 4 Schematic diagram of the opening of the installation groove of the present invention;

[0036] Figure 5 Schematic diagram of the sectional structure of the placing plate of the present invention;

[0037] Figure 6 For the present invention Figure 5 Enlarged structure schematic diagram at B in the present invention;

[0038] Figure 7 Schematic diagram of the sectional structure of the sliding block of the present invention;

[0039] Figure 8 For the present invention Figure 7 Enlarged structure schematic diagram at C in the present invention;

[0040] Figure 9 For the present invention Figure 7 Enlarged structure schematic diagram at D in the present invention;

[0041] Figure 10 Schematic diagram of the sectional structure of the fixed cover of the present invention;

[0042] Figure 11 For the present invention Figure 10 Enlarged structure schematic diagram at E in the present invention;

[0043] Figure 12 Schematic diagram of the installation structure of the lead screw of the present invention;

[0044] Figure 13 For the present invention Figure 12 Enlarged structure schematic diagram at F in the present invention.

[0045] In the figure: 1. Placing plate; 2. Support column; 3. Arc-shaped I-beam; 4. Docking steel plate; 5. Limit component; 51. L-shaped plate; 52. Electric push rod; 53. Pressing plate; 54. Installation groove; 55. Linear guide rail; 56. Sliding block; 57. Sliding groove; 58. Bottom rod; 59. Moving plate; 510. First spring; 511. Rotating shaft; 512. Clamping plate; 513. Torsion spring; 514. Inclined block; 515. Vertical groove; 516. Slide bar; 517. Second spring; 518. Extrusion block; 519. Third spring; 520. Pressing plate; 521. Gear; 522. Upper toothed plate; 523. Lower toothed plate; 524. Fixed cover; 525. Ring; 526. Side groove; 527. Fourth spring; 528. Tightening plate; 529. Fitting groove; 530. Connecting hose; 6. Positioning component; 61. Fixed plate; 62. Adjusting screw; 63. Cross plate; 64. Rotating plate; 65. Tightening screw; 66. Auxiliary plate. Specific implementation manner

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] Please refer to Figures 1-3 , the present invention provides a technical solution: an arch welding device for tunnel construction, including a placing plate 1, an arc-shaped I-beam 3, a docking steel plate 4, and support columns 2 fixedly installed around the bottom of the placing plate 1.

[0048] A limit component 5 is arranged on one side inside the placing plate 1.

[0049] The limit component 5 includes a moving unit and a locking unit. The moving unit includes an installation groove 54 horizontally opened on the top of the placing plate 1. A linear guide rail 55 is fixedly installed inside the installation groove 54, and a sliding block 56 is fixedly installed at the output end of the linear guide rail 55.

[0050] An L-shaped plate 51 is fixedly connected to the middle of the top of the placing plate 1. An electric push rod 52 is fixedly installed on one side inside the L-shaped plate 51. There are no less than two electric push rods 52. The telescopic ends of the two electric push rods 52 are fixedly connected to the same pressing plate 53. There are no less than three installation grooves 54. A sliding groove 57 is opened on one side of the top of the sliding block 56. A bottom rod 58 is horizontally fixedly connected below the sliding groove 57.

[0051] Two moving plates 59 are symmetrically and slidably mounted on the outside of the bottom rod 58. A first spring 510 is sleeved on the outside of the bottom rod 58. The two ends of the first spring 510 are fixedly connected to the two moving plates 59 respectively. A rotating shaft 511 is fixedly connected to the top of the moving plate 59. The top end of the rotating shaft 511 is rotatably connected to the bottom of the clamping plate 512. A torsion spring 513 is sleeved on the outside of the rotating shaft 511. The two ends of the torsion spring 513 are fixedly connected to the moving plate 59 and the clamping plate 512 respectively.

[0052] The locking unit includes a sliding rod 516 vertically and slidably mounted inside the sliding block 56. An extrusion block 518 is fixedly connected to the outside of the sliding rod 516. Two moving plates 59 are symmetrically and slidably mounted on the top of the sliding block 56. An inclined block 514 is fixedly connected to the outside of the right moving plate 59. The extrusion block 518 abuts against the inclined block 514.

[0053] On the other side of the top of the sliding block 56, a vertical groove 515 is formed. The sliding rod 516 and the extrusion block 518 are both slidably connected to the vertical groove 515. A second spring 517 is sleeved on the lower part of the outside of the sliding rod 516. The two ends of the second spring 517 are fixedly connected to the bottom of the sliding block 56 and the bottom end of the sliding rod 516 respectively. A pressing plate 520 is slidably connected to the outside of the sliding rod 516. The pressing plate 520 is located above the clamping plate 512. A third spring 519 is sleeved on the upper part of the outside of the sliding rod 516. The two ends of the third spring 519 are fixedly connected to the top end of the sliding rod 516 and the top of the pressing plate 520 respectively.

[0054] A gear 521 is rotatably connected to the upper part inside the sliding groove 57. An upper toothed plate 522 is fixedly connected to the upper part of one side of the left moving plate 59. A lower toothed plate 523 is fixedly connected to the lower part of the side of the right moving plate 59 close to the gear 521. The upper toothed plate 522 and the lower toothed plate 523 are both meshed with the gear 521. A fixed cover 524 is also fixedly connected to the other side of the top of the sliding block 56. The sliding rod 516 is slidably connected to the fixed cover 524.

[0055] A clamping plate 512 is rotatably mounted on the top of the moving plate 59. A pressing plate 528 is slidably mounted on one side of the clamping plate 512. A fixed cover 524 is also fixedly connected to the top of the sliding block 56. A ring 525 is fixedly connected to the outside of the sliding rod 516.

[0056] The circular ring 525 is in contact with the inner wall of the fixed cover 524, and the circular ring 525 is slidably connected to the fixed cover 524. A side groove 526 is formed on the side of the clamping plate 512 close to the abutting plate 528. A fourth spring 527 is fixedly installed inside the side groove 526. There are no less than two fourth springs 527. The fourth spring 527 is fixedly connected to the abutting plate 528. The abutting plate 528 is slidably connected to the side groove 526. A fitting groove 529 is formed on the side of the abutting plate 528 away from the clamping plate 512. A connecting hose 530 is connected between the fitting groove 529 and the fixed cover 524. The fitting groove 529 is communicated with the inside of the fixed cover 524 through the connecting hose 530.

[0057] Example 1: As Figures 4-11 shown, the operator places the arc-shaped I-beam 3 on the top of the placing plate 1 and between two adjacent abutting plates 528. The electric push rod 52 is started. The electric push rod 52 drives the pressing plate 53 to press down. The pressing plate 53 drives the sliding rod 516 to descend. The sliding rod 516 compresses the third spring 519 and drives the pressing plate 520 to press down, so that the pressing plate 520 presses on the top surface of the arc-shaped I-beam 3. The descending of the sliding rod 516 will stretch the second spring 517 and drive the extrusion block 518 to descend. The extrusion block 518 extrudes the inclined block 514, and the inclined block 514 drives the moving plate 59 on the right side to move.

[0058] The moving plate 59 on the right side drives the lower toothed plate 523 to move. The lower toothed plate 523 drives the gear 521 to rotate. The gear 521 drives the upper toothed plate 522 and the moving plate 59 on the left side to move. The two moving plates 59 slide on the bottom rod 58 and compress the first spring 510, so that the two moving plates 59 approach each other. The moving plate 59 drives the rotating shaft 511 and the clamping plate 512 to move. The clamping plate 512 drives the abutting plate 528 to move, so that the abutting plate 528 abuts against both sides of the arc-shaped I-beam 3. The fitting groove 529 fits with the arc-shaped I-beam 3. The inside above the fitting groove 529, the connecting hose 530 and the fixed cover 524 is in a sealed state.

[0059] At this time, the sliding rod 516 continues to press down. The abutting plate 528 does not move. The clamping plate 512 continues to move. The sliding rod 516 drives the circular ring 525 to descend, so that the volume above the inside of the fixed cover 524 increases, which is convenient for the inside above the fitting groove 529 and the fixed cover 524 to be in a negative pressure state until the fourth spring 527 is completely compressed, thereby improving the adsorption and abutting effect of the abutting plate 528 on the arc-shaped I-beam 3. The clamping plate 512 is rotatably connected to the rotating shaft 511, which is convenient for the inclination of the clamping plate 512 and the abutting plate 528, so as to adapt to the clamping of the arc of the arc-shaped I-beam 3.

[0060] Through the pressing of the multi-point pressing plate 528 and the adsorption of the fitting groove 529, and in cooperation with the downward limit of the pressing plate 520, the sliding and warping of the arc-shaped I-beam 3 after positioning are reduced, and the welding accuracy is improved. The pressing plate 520 can rotate outside the sliding rod 516, thereby releasing the blockage of the arc-shaped I-beam 3, facilitating the removal of the arc-shaped I-beam 3 after welding, and solving the problem that the device does not limit the top surface of the section steel, resulting in the section steel being likely to warp or shift along its own arc trajectory during welding, reducing the welding accuracy and welding stability between the section steel and the connecting steel plates at both ends.

[0061] Positioning components 6 are symmetrically arranged on one side of the front and back of the placing plate 1. The positioning components 6 include symmetrically arranged fixing plates 61. The fixing plates 61 are fixedly connected to the placing plate 1. An adjusting screw 62 is rotatably connected between the two fixing plates 61. A cross plate 63 is threadedly connected to the outside of the adjusting screw 62. One side of the cross plate 63 is in contact with the placing plate 1.

[0062] Rotating plates 64 are symmetrically installed on the top of the cross plate 63. The rotating plates 64 are rotatably connected to the cross plate 63. A pressing screw 65 is horizontally threadedly connected inside the rotating plates 64.

[0063] One side of the pressing screw 65 is fixedly connected to a pressing disc. One side of the rotating plate 64 is fixedly connected to an auxiliary plate 66. The auxiliary plate 66 is perpendicular to the rotating plate 64.

[0064] Embodiment 2: As Figures 12-13 shown, after the arc-shaped I-beam 3 is positioned, the operator first rotates the adjusting screw 62 to move the cross plate 63 to the position below the end of the arc-shaped I-beam 3. Then, the butt joint steel plate 4 and the arc-shaped I-beam 3 are pressed and butted, and the butt joint steel plate 4 is kept between the two pressing screws 65.

[0065] Rotate the two pressing screws 65. The pressing screws 65 drive the pressing discs to press both sides of the butt joint steel plate 4, and the auxiliary plate 66 is in contact with the arc-shaped I-beam 3 at this time, facilitating the accurate positioning and butting of the arc-shaped I-beam 3 and the butt joint steel plate 4. Then, welding can be carried out through an external power arm welding robot.

[0066] Working principle: When using this device, first, as Figures 1-13As shown, the operator places the arc-shaped I-beam 3 on the top of the placement plate 1 and between two adjacent pressing plates 528. Then, the electric push rod 52 is started, and the pressing plate 520 presses on the top surface of the arc-shaped I-beam 3. The two moving plates 59 move closer to each other. The moving plate 59 drives the rotating shaft 511 and the clamping plate 512 to move. The clamping plate 512 drives the pressing plate 528 to move, so that the pressing plate 528 presses against both sides of the arc-shaped I-beam 3, and the fitting groove 529 fits with the arc-shaped I-beam 3. At this time, the sliding rod 516 continues to press down, the pressing plate 528 remains stationary, and the upper part inside the fitting groove 529 and the fixed cover 524 is in a negative pressure state. The clamping plate 512 is rotatably connected to the rotating shaft 511, which facilitates the inclination of the clamping plate 512 and the pressing plate 528, so as to adapt to the radian of the arc-shaped I-beam 3 for clamping. The pressing plate 520 can rotate outside the sliding rod 516, so as to release the blockage of the arc-shaped I-beam 3, which is convenient for taking out the arc-shaped I-beam 3 after welding. After the arc-shaped I-beam 3 is positioned, the operator presses and butts the butt joint steel plate 4 with the arc-shaped I-beam 3, and rotates the two pressing screws 65. The pressing screws 65 drive the pressing discs to press both sides of the butt joint steel plate 4, and the auxiliary plate 66 is in contact with the arc-shaped I-beam 3 at this time, which is convenient for accurately positioning and butting the arc-shaped I-beam 3 and the butt joint steel plate 4. Then, welding can be carried out by an external power arm welding robot.

[0067] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0068] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An arch welding device for tunnel construction, comprising a placement plate (1), an arc-shaped I-beam (3), a butt joint steel plate (4), and support columns (2) fixedly installed around the bottom of the placement plate (1); It is characterized in that It further includes: A limiting component (5) is arranged on one side inside the placement plate (1), and positioning components (6) are symmetrically arranged on one side of the front and back of the placement plate (1); The limiting component (5) includes a moving unit and a locking unit. The moving unit includes mounting grooves (54) parallelly opened at the top of the placement plate (1). A linear guide rail (55) is fixedly installed inside the mounting grooves (54), and a sliding block (56) is fixedly installed at the output end of the linear guide rail (55); The locking unit includes a sliding rod (516) vertically slidably installed inside the sliding block (56). An extrusion block (518) is fixedly connected to the outside of the sliding rod (516). Two moving plates (59) are symmetrically slidably installed at the top of the sliding block (56). An inclined block (514) is fixedly connected to the outside of the right moving plate (59), and the extrusion block (518) abuts against the inclined block (514); A clamping plate (512) is rotatably installed at the top of the moving plate (59). A pressing plate (528) is slidably installed on one side of the clamping plate (512). A fixed cover (524) is also fixedly connected to the top of the sliding block (56). A ring (525) is fixedly connected to the outside of the sliding rod (516).

2. The arch frame welding equipment for tunnel construction according to claim 1, characterized in that: An L-shaped plate (51) is fixedly connected to the middle of the top of the placement plate (1). An electric push rod (52) is fixedly installed on one side inside the L-shaped plate (51). There are no less than two electric push rods (52). The telescopic ends of the two electric push rods (52) are fixedly connected to the same pressing plate (53). There are no less than three mounting grooves (54). A sliding groove (57) is opened at one side of the top of the sliding block (56). A bottom rod (58) is horizontally fixedly connected to the lower part inside the sliding groove (57).

3. The arch frame welding device for tunnel construction according to claim 2, characterized in that: The two moving plates (59) are symmetrically slidably installed on the outside of the bottom rod (58). A first spring (510) is sleeved on the outside of the bottom rod (58). The two ends of the first spring (510) are respectively fixedly connected to the two moving plates (59). A rotating shaft (511) is fixedly connected to the top of the moving plate (59). The top end of the rotating shaft (511) is rotatably connected to the bottom of the clamping plate (512). A torsion spring (513) is sleeved on the outside of the rotating shaft (511). The two ends of the torsion spring (513) are respectively fixedly connected to the moving plate (59) and the clamping plate (512).

4. The arch frame welding equipment for tunnel construction according to claim 3, characterized in that: On the other side of the top of the sliding block (56), a vertical groove (515) is provided. Both the sliding rod (516) and the extrusion block (518) are slidably connected to the vertical groove (515). A second spring (517) is sleeved on the lower part of the outer side of the sliding rod (516). The two ends of the second spring (517) are respectively fixedly connected to the bottom of the sliding block (56) and the bottom end of the sliding rod (516). A pressing plate (520) is slidably connected to the outer side of the sliding rod (516). The pressing plate (520) is located above the clamping plate (512). A third spring (519) is sleeved on the upper outer side of the sliding rod (516). The two ends of the third spring (519) are respectively fixedly connected to the top end of the sliding rod (516) and the top of the pressing plate (520).

5. A steel arch welding device for tunnel construction according to claim 1, characterized in that: A gear (521) is rotatably connected above the inside of the sliding groove (57). An upper toothed plate (522) is fixedly connected to the upper part of one side of the left moving plate (59). A lower toothed plate (523) is fixedly connected to the lower part of the side of the right moving plate (59) close to the gear (521). Both the upper toothed plate (522) and the lower toothed plate (523) are meshed with the gear (521). A fixed cover (524) is also fixedly connected to the other side of the top of the sliding block (56). The sliding rod (516) is slidably connected to the fixed cover (524).

6. The arch frame welding equipment for tunnel construction according to claim 5, characterized in that: The circular ring (525) is attached to the inner wall of the fixed cover (524), and the circular ring (525) is slidably connected to the fixed cover (524). A side groove (526) is provided on the side of the clamping plate (512) close to the pressing plate (528). A fourth spring (527) is fixedly installed inside the side groove (526). The number of the fourth springs (527) is not less than two. The fourth spring (527) is fixedly connected to the pressing plate (528). The pressing plate (528) is slidably connected to the side groove (526). A fitting groove (529) is provided on the side of the pressing plate (528) away from the clamping plate (512). A connecting hose (530) is connected between the fitting groove (529) and the fixed cover (524). The fitting groove (529) is communicated with the inside of the fixed cover (524) through the connecting hose (530).

7. A steel arch welding device for tunnel construction according to claim 1, wherein: The positioning assembly (6) includes symmetrically arranged fixing plates (61). The fixing plates (61) are fixedly connected to the placing plate (1). An adjusting screw rod (62) is rotatably connected between the two fixing plates (61). A cross plate (63) is threadedly connected to the outer side of the adjusting screw rod (62). One side of the cross plate (63) is attached to the placing plate (1).

8. The arch frame welding equipment for tunnel construction according to claim 7, characterized in that: Rotating plates (64) are symmetrically installed on the top of the cross plate (63). The rotating plates (64) are rotatably connected to the cross plate (63). A tightening screw rod (65) is horizontally threadedly connected inside the rotating plates (64).

9. The arch frame welding equipment for tunnel construction according to claim 8, characterized in that: One side of the tightening screw rod (65) is fixedly connected to a tightening disc. An auxiliary plate (66) is fixedly connected to the outer side of one of the rotating plates (64). The auxiliary plate (66) is perpendicular to the rotating plate (64).

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