A continuous intelligent automatic plasma welding device for crosspieces of a bridge and a welding method thereof

Abstract

The application relates to the technical field of plasma welding, in particular to a continuous intelligent automatic plasma welding device for crosspieces of a bridge and a welding method thereof, which comprises a frame structure, a clamping mechanism, a supporting mechanism and a plasma automatic welding mechanism arranged on the frame structure; the supporting mechanism comprises: horizontally arranged frames, a plurality of groups of the horizontally arranged frames are arranged at equal intervals; a driving assembly is connected with the horizontally arranged frames, when the driving assembly operates, the adjacent two groups of the horizontally arranged frames can move at equal intervals, a fan-shaped gear ring is arranged on the driving assembly; a lifting assembly is arranged on the horizontally arranged frame and used for supporting the crosspiece, the lifting assembly is matched with a positioning piece arranged on the horizontally arranged frame, and the lifting assembly can position the crosspiece when the crosspiece is lifted; a screw driving structure is connected with the positioning piece and the fan-shaped gear ring, when a plurality of groups of the horizontally arranged frames move away from each other, the screw driving structure can make the positioning piece stepwise move towards the horizontally arranged frame, so that the welding speed and intensity are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plasma welding, in particular to a continuous intelligent automatic plasma welding device for crosspieces of a cable bridge and a welding method thereof. BACKGROUND

[0002] In the field of manufacturing and installation of ladder-type cable bridges, the welding positioning between crosspieces and side plates has been limited to the mode of "one width and one fixed spacing" for a long time: the wider the ladder is and the longer the crosspiece is, the shorter the maximum installation spacing allowed is in inverse proportion in order to meet the specification requirement that the deflection should not exceed L / 150, so the production line usually punches a fixed size such as 200 mm, 250 mm or 300 mm on the side plate and performs plasma welding; once the design is changed or the position of the support and hanger deviates from the crosspiece node of the finished product, the construction personnel can only cut the cable bridge again, weld the crosspiece or move the support and hanger, which not only damages the corrosion protection layer but also significantly increases the working hours.

[0003] Although the existing adjustable positioning equipment can achieve equal spacing through a screw nut, it must replace the positioning cam as a whole or reprogram the servo parameters when switching to different width cable bridges, and the downtime is as long as tens of minutes, and its core idea still stays at the level of "preset spacing", which cannot automatically adapt to the new spacing requirement as the length of the crosspiece changes, and cannot fine-tune the spacing within a certain range while maintaining the carrying capacity, thereby limiting the rapid installation of the cable bridge under complex path or existing support and hanger conditions. SUMMARY

[0004] The present application aims to provide a continuous intelligent automatic plasma welding device for crosspieces of a cable bridge and a welding method thereof to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A continuous intelligent automatic plasma welding device for crosspieces of a cable bridge, comprising:

[0007] a frame structure, wherein a clamping mechanism, a supporting mechanism and a plasma automatic welding mechanism are arranged on the frame structure;

[0008] the supporting mechanism comprises:

[0009] a horizontal frame, wherein a plurality of groups of the horizontal frame are arranged, and the plurality of groups of the horizontal frame are distributed at equal intervals;

[0010] a driving assembly connected to the horizontal frame, wherein when the driving assembly operates, it can make the adjacent two groups of the horizontal frame move at equal intervals, and a fan-shaped gear ring is arranged on the driving assembly;

[0011] A lifting assembly is arranged on the horizontal frame and used for supporting the crosspiece, and the lifting assembly is matched with the positioning member arranged on the horizontal frame and can position the crosspiece when the crosspiece is lifted;

[0012] A screw driving structure is connected with the positioning member and the sector gear ring, and the screw driving structure can step the positioning member towards the horizontal frame when a plurality of horizontal frames move away from each other.

[0013] As a further scheme of the present application, the driving assembly comprises a first frame body and a second frame body arranged in parallel, and the first frame body and the second frame body are connected through a first electric telescopic rod;

[0014] A first sliding sleeve arranged on the horizontal frame is equidistantly arranged on the second frame body;

[0015] The driving assembly further comprises a V-shaped hinging structure arranged between two adjacent horizontal frames, and the V-shaped hinging structure is slidingly arranged on the first frame body, and when the first frame body and the second frame body relatively move, the V-shaped hinging structure can drive the two adjacent horizontal frames to relatively slide along the length direction of the second frame body.

[0016] As a further scheme of the present application, the V-shaped hinging structure comprises a plurality of second sliding sleeves slidingly arranged on the first frame body, two groups of supporting rods are symmetrically rotatably arranged on the second sliding sleeve, and the two groups of supporting rods are rotatably connected with the first sliding sleeves on the two sides of the second sliding sleeve, respectively.

[0017] One end of the supporting rod away from the second sliding sleeve is fixedly connected with the sector gear ring.

[0018] As a further scheme of the present application, the lifting assembly comprises a supporting frame parallel to the horizontal frame and a second electric telescopic rod arranged on the horizontal frame, and the action end of the second electric telescopic rod is fixedly connected with the supporting frame.

[0019] The side of the supporting frame is provided with an elastic centering assembly, and the elastic centering assembly is used for limiting the crosspiece.

[0020] As a further scheme of the present application, the elastic centering assembly comprises two groups of clamping members rotatably arranged on the side of the supporting frame, and a plurality of rollers are equidistantly and rotatably arranged on the side of the clamping member towards the crosspiece.

[0021] The pivot shaft of the clamping member is connected with an extension rod, the end of the extension rod is rotatably arranged with a cylindrical spring, and one end of the cylindrical spring away from the extension rod is rotatably connected with the supporting frame.

[0022] The clamping member is matched with an abutting shaft arranged on the side of the supporting frame.

[0023] As a further scheme of the present application: the lateral frame is provided with a sliding groove along the length direction, and a sliding block is slidingly installed in the sliding groove, the sliding block is fixedly connected with the positioning member, and the sliding block is connected with the screw driving structure;

[0024] The positioning member comprises a guide installed on the sliding block, and a guide inclined surface extending towards the guide is arranged on one side of the guide towards the support frame.

[0025] As a further scheme of the present application: the screw driving structure comprises a rotating shaft rotatingly installed on the lateral frame and a sleeve pipe fixedly connected with the sliding block, a gear meshing with the sector tooth ring is installed on one end of the rotating shaft, a spiral driving groove is arranged on the circumferential surface of the rotating shaft, and a convex shaft arranged on the inner wall of the sleeve pipe can slide in the spiral driving groove.

[0026] As a further scheme of the present application: the spiral driving groove comprises a plurality of groups of step grooves arranged on the rotating shaft and connected at the head and tail, the step groove comprises a spiral groove arranged along the length direction of the rotating shaft and an arc groove arranged along the axial direction of the rotating shaft, and the spiral groove is connected with the arc groove.

[0027] When the convex shaft slides in the spiral groove, the sleeve pipe can move along the length direction of the rotating shaft.

[0028] A method for welding a crosspiece by using the continuous intelligent automatic plasma welding device of the crosspiece of the bridge frame, comprising the following steps:

[0029] Step one: control the driving assembly to act, so that the minimum spacing is maintained between each group of lateral frames;

[0030] Step two: the crosspiece to be welded is arranged on the lifting assembly, and the elastic centering assembly is used to arrange the crosspiece along the length direction of the support frame;

[0031] Step three: control the driving assembly to act, so that each group of lateral frames is expanded equidistantly, and the spacing between each lateral frame corresponds to the length of the crosspiece;

[0032] Step four: when the driving assembly is in action, the screw driving structure is synchronously actuated, so that the position of the positioning member is changed;

[0033] Step five: the lifting assembly is actuated, so that the crosspiece is moved upward, and the position of the crosspiece is adjusted when the crosspiece abuts against the positioning member;

[0034] Step six: the clamping mechanism is actuated, so that the side plate carried thereby is moved towards the crosspiece, and a predetermined gap is generated between the side plate and the crosspiece;

[0035] Step seven: the plasma automatic welding mechanism acts to weld the side plates and crosspieces.

[0036] Compared with the prior art, the present application has the following advantages:

[0037] The driving assembly and the spiral driving structure are provided, so that the spacing of the crosspieces can be automatically matched with the length of the crosspieces, and the spacing between the crosspieces can be automatically adjusted when the crosspieces of the corresponding length are welded, without the need for calculation and measurement, thereby reducing the preparation work before welding, shortening the installation time, and enabling the crosspieces to be evenly distributed in the side plates while ensuring the strength of the bridge after welding, thereby avoiding the inconsistency in the strength of the bridge and the waste of materials caused by the increase in the additional crosspieces.

[0038] The driving assembly is provided, so that the spacing between the supporting frames in the initial state is minimized, the distance that needs to be moved by the worker when placing the crosspieces is smaller, the operation amount of the worker is reduced, the size of the external loading device is smaller when the crosspieces are placed by the external loading device, the floor area is reduced, and the distance between the supporting frames in this state is constant, so that the crosspieces can be placed on the supporting frames more accurately when the external loading device is in operation. In addition, the driving assembly can keep the same spacing between the two adjacent groups of supporting frames when it is in operation, so that the crosspieces can be quickly positioned, the production speed is improved, and the consistency of the distance between the two adjacent groups of crosspieces is ensured.

[0039] The elastic centering assembly and the guide are provided, so that the crosspieces can be positioned twice before installation, the position accuracy of the crosspieces is ensured, and the distance between the crosspiece end and the side plate can be more directly controlled when the side plate is close to the crosspiece end, so that the distance between the crosspiece end and the side plate can be kept to improve the welding strength and effect. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 Structure schematic view of one embodiment of the continuous intelligent automatic plasma welding device for the crosspieces of the bridge.

[0041] Figure 2 Structure schematic view of another angle of one embodiment of the continuous intelligent automatic plasma welding device for the crosspieces of the bridge. Figure 1 Enlarged view of the structure at A in FIG. 6.

[0042] Figure 3 Structure schematic view of another angle of one embodiment of the continuous intelligent automatic plasma welding device for the crosspieces of the bridge.

[0043] Figure 4 Enlarged view of the structure at B in FIG. 7. Figure 3

[0044] ​Figure 5 Structure diagram of driving assembly in one embodiment of the continuous intelligent automatic plasma welding device for the crosspiece of the bridge.

[0045] Figure 6 Structure diagram of screw driving structure of lifting assembly in one embodiment of the continuous intelligent automatic plasma welding device for the crosspiece of the bridge.

[0046] Figure 7 Structure diagram of rotating shaft and sleeve pipe in one embodiment of the continuous intelligent automatic plasma welding device for the crosspiece of the bridge.

[0047] Figure 8 Structure diagram of elastic centering assembly in one embodiment of the continuous intelligent automatic plasma welding device for the crosspiece of the bridge.

[0048] In the figure: 1, first frame body; 2, second frame body; 3, first electric telescopic rod; 4, transverse frame; 401, sliding groove; 5, supporting frame; 6, second electric telescopic rod; 7, first sliding sleeve; 8, second sliding sleeve; 9, supporting rod; 10, fan-shaped tooth ring; 11, gear; 12, rotating shaft; 1201, spiral groove; 1202, arc-shaped groove; 13, sleeve pipe; 1301, convex shaft; 14, sliding block; 15, clamping piece; 16, roller; 17, abutting shaft; 18, extension rod; 19, cylindrical spring; 20, guide piece; 2001, guide inclined surface. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0050] In addition, in the present application, an element is referred to as "fixed to" or "disposed on" another element, which can be directly on another element or can have a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or can have a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0051] Please refer to Figures 1-8 In the embodiments of the present application, a continuous intelligent automatic plasma welding device for the crosspiece of the bridge comprises:

[0052] Frame body structure, the frame body structure is provided with clamping mechanism, supporting mechanism and plasma automatic welding mechanism;

[0053] The supporting mechanism comprises a horizontal frame 4, a driving assembly, a lifting assembly and a screw driving structure.

[0054] The horizontal frame 4 is provided in multiple groups, and the multiple groups of horizontal frames 4 are equidistantly distributed.

[0055] The driving assembly is connected to the horizontal frame 4, and when the driving assembly is in action, it can make the adjacent two groups of horizontal frames 4 move equidistantly, and a sector gear ring 10 is arranged on the driving assembly.

[0056] The driving assembly comprises a first frame body 1 and a second frame body 2 arranged in parallel, and the first frame body 1 and the second frame body 2 are connected by a first electric telescopic rod 3. A first sliding sleeve 7 mounted on the horizontal frame 4 is equidistantly arranged on the second frame body 2. Among them, the first sliding sleeve 7 on the horizontal frame 4 at the most side is in a fixed connection state with the second frame body 2, while the first sliding sleeve 7 on the remaining horizontal frames 4 is in a sliding connection state with the second frame body 2. In this way, when the first frame body 1 and the second frame body 2 move relatively, the movable horizontal frames 4 can move with the horizontal frame 4 at the most side as a reference, so that the positions of these movable horizontal frames 4 are more controllable, and the position accuracy of the horizontal frames is improved to a certain extent.

[0057] Among them, the second frame body 2 is mounted on the frame structure, so that the horizontal height is constant during the action of the horizontal frame 4.

[0058] The driving assembly further comprises a V-shaped hinged structure arranged between the adjacent two groups of horizontal frames 4, which is slidingly arranged on the first frame body 1. When the first frame body 1 and the second frame body 2 move relatively, the V-shaped hinged structure can drive the adjacent two groups of horizontal frames 4 to slide relatively along the length direction of the second frame body 2. The V-shaped hinged structure comprises multiple second sliding sleeves 8 slidingly mounted on the first frame body 1, two groups of support rods 9 are symmetrically rotatably mounted on the second sliding sleeve 8, and the two groups of support rods 9 are rotatably connected with the first sliding sleeves 7 on both sides of the second sliding sleeve 8, respectively.

[0059] The end of the support rod 9 away from the second sliding sleeve 8 is fixedly connected with the sector gear ring 10.

[0060] In the initial state, the first frame body 1 and the second frame body 2 maintain the maximum distance, at this time, the distance between the adjacent two groups of first sliding sleeves 7 and the distance between the adjacent two groups of second sliding sleeves 8 are the smallest, and the distance between the adjacent two groups of transverse frames 4 and the lifting assembly is the smallest, so that the transverse bars can be placed on the lifting assembly at a smaller distance, which reduces the operation amount of the workers when placing the transverse bars manually, and the size of the external loading device is smaller, thereby reducing the floor area. In this state, the distance between the lifting assemblies is constant, so that the transverse bars can be placed on the lifting assembly more accurately when the external loading device is in operation.

[0061] When the transverse bars are placed on the lifting assembly, the first electric telescopic rod 3 is controlled to operate, at this time, the first electric telescopic rod 3 can drive the first frame body 1 to move towards the second frame body 2, referring to FIG. 4. Figure 5 At this time, since the rightmost transverse frame 4 is in a fixed state, the support rod 9 connected with the transverse frame 4 can drive the rightmost second sliding sleeve 8 to move along the length direction of the first frame body 1, and the other support rod 9 connected with the second sliding sleeve 8 can drive the transverse frame 4 adjacent to the rightmost transverse frame 4 to move along the second frame body 2, and the transverse frame 4 adjacent to the rightmost transverse frame 4 can drive the second group of second sliding sleeves 8 to move along the length direction of the first frame body 1 through the support rod 9 connected therewith, so that the second group of second sliding sleeves 8 can drive the other group of transverse frames 4 to move, and since the first frame body 1 and the second frame body 2 are in a parallel state, the two groups of support rods 9 connected with the same group of second sliding sleeves 8 can be in a symmetrical state, thereby keeping the same distance between the adjacent two groups of transverse frames 4, at this time, the transverse bars on the lifting assembly are also arranged at equal intervals, which realizes the rapid positioning of the transverse bars and improves the production speed while ensuring the consistency of the distance between the adjacent two groups of transverse bars.

[0062] It should be noted that the above description is intended to assist understanding, and in actual operation, the multiple groups of transverse frames 4 and the second sliding sleeves 8 operate synchronously.

[0063] Further, in order to reduce the friction between the first sliding sleeve 7 and the second frame body 2 and the second sliding sleeve 8 and the first frame body 1, lubricating oil can be applied to the sliding positions of the first sliding sleeve 7 and the second frame body 2 and the second sliding sleeve 8 and the first frame body 1, or rotating rollers can be arranged on the upper and lower sides of the inner side of the first sliding sleeve 7 and the second sliding sleeve 8, so that the friction is smaller when the first sliding sleeve 7 slides relative to the second frame body 2 and the second sliding sleeve 8 slides relative to the first frame body 1, and the operation is more smooth.

[0064] Please refer to Figures 5-6The lifting assembly is mounted on the horizontal frame 4 and is used to support the horizontal bar. The lifting assembly cooperates with the positioning member mounted on the horizontal frame 4 to position the horizontal bar when it rises. The positioning member includes a guide member 20 mounted on the horizontal frame 4. The guide member 20 has a guide slope 2001 extending toward the guide member 20 on the side facing the support frame 5.

[0065] The lifting assembly includes a support frame 5 arranged parallel to the horizontal frame 4 and a second electric telescopic rod 6 installed on the horizontal frame 4, wherein the actuating end of the second electric telescopic rod 6 is fixedly connected to the support frame 5.

[0066] The side of the support frame 5 is provided with an elastic centering component, which is used to limit the crossbar. The elastic centering component includes two sets of clamping members 15 rotatably installed on the side of the support frame 5. The clamping members 15 are equidistant from one side of the crossbar and rotatably installed with multiple sets of rollers 16.

[0067] An extension rod 18 is connected to the rotating shaft of the clamping member 15. A columnar spring 19 is rotatably mounted at the end of the extension rod 18. The end of the columnar spring 19 away from the extension rod 18 is rotatably connected to the support frame 5.

[0068] The clamping member 15 is adapted to the abutment shaft 17 installed on the side of the support frame 5.

[0069] For ease of understanding, please refer to Figure 8 The position where the cylindrical spring 19 connects to the support bracket 5 is marked as a, the pivot of the clamping member 15 is marked as b, and the position where the cylindrical spring 19 connects to the extension rod 18 is marked as c. In the initial state, the cylindrical spring 19 is in a stretched state, and the clamping member 15 is in a stretched state. Figure 8 In the rightmost state, the cylindrical spring 19 acts on the extension rod 18, causing the clamping member 15 to tend to deflect clockwise. However, since the clamping member 15 is in the state of abutting the abutting shaft 17, the clamping member 15 can be in a stable open state in this state, that is, the line connecting ac is located below point b.

[0070] When the crosspiece to be welded is placed on the support frame 5, the end of the extension rod 18 (i.e. c) can be made to move in a circle by rotating the clamping piece 15 counterclockwise by external force, and in this process, the distance between the end of the extension rod 18 and the other end of the cylindrical spring 19 will increase, so that the cylindrical spring 19 is further stretched, and when the lines abc are collinear, the cylindrical spring 19 reaches the maximum stretching amount, and then when the clamping piece 15 is further rotated counterclockwise, the ac line will be above b, at which time the cylindrical spring 19 can actively pull the clamping piece 15 by releasing the elastic potential energy, so that the clamping piece 15 can be actively deflected to enable the roller 16 on the side of the clamping piece 15 to clamp and position the crosspiece to be welded, so that the length direction of the crosspiece is kept in the same orientation as the length direction of the support frame 5, and the crosspiece can be positioned along the width direction of the support frame 5.

[0071] After the cross frame 4 moves to keep the groups of crosspieces at a predetermined distance, the second electric telescopic rod 6 drives the support frame 5 to move upward, and in this process, the end of the crosspiece placed on the support frame 5 can cooperate with the guide slope 2001 on the inner side of the guide 20 to move along the length direction of the support frame 5, so that the crosspiece can be positioned along the length direction of the support frame 5, and then the support frame 5 continues to move upward with the crosspiece positioned, and stops moving when it reaches the movement height, and then the clamping mechanism and the plasma automatic welding mechanism act in turn to move the side plate close to the crosspiece and then weld it.

[0072] It should be noted that when the clamping mechanism drives the side plate to move toward the crosspiece, the side plate cannot completely fit the end of the crosspiece, mainly because when the side plate completely fits the end of the crosspiece, it will cause unstable arc during plasma welding, which is specifically manifested in that when the gap between the two is too small, ion gas cannot be discharged, forming an "arc pit hole", and when the gap between the two is too small, the side plate will be deformed after welding and heat shrinking, i.e. the bottom of the side plate will be outwardly expanded, which will affect the installation of the subsequent cover plate, which is also the reason why the side plate is not used to abut against the crosspiece to position it along the length direction of the support frame 5. In this embodiment, the position of the crosspiece can be determined after the crosspiece is positioned by the guide 20, and then when the clamping mechanism drives the side plate to move, the distance between the end of the crosspiece and the side plate can be more directly controlled, so that the two can keep a moving gap therebetween, thereby improving the welding strength and effect.

[0073] Please refer to Figures 4-7 , the cross frame 4 is provided with a sliding groove 401 along the length direction on both sides, the sliding groove 401 is slidably installed with a sliding block 14, the sliding block 14 is fixedly connected with the guide 20, and the sliding block 14 is connected with the screw driving structure;

[0074] The screw driving structure is connected with the positioning member and the sector gear ring 10, and can drive the positioning member to stepwise move towards the horizontal frame 4 when the horizontal frames 4 move away from each other.

[0075] The screw driving structure comprises a rotating shaft 12 rotatably installed on the horizontal frame 4 and a sleeve pipe 13 fixedly connected with the sliding block 14, one end of the rotating shaft 12 is provided with a gear 11 engaged with the sector gear ring 10, and a screw driving groove is arranged on the circumferential surface of the rotating shaft 12, and a convex shaft 1301 arranged on the inner wall of the sleeve pipe 13 can slide in the screw driving groove, wherein the radius of the sector gear ring 10 is greater than the radius of the gear 11, so that the gear 11 can rotate more turns when rotating relative to the sector gear ring 10, thereby controlling the guiding member 20 to move more displacement.

[0076] The screw driving groove comprises a plurality of stepwise grooves arranged on the rotating shaft 12 and connected at the head and tail, the stepwise groove comprises a screw groove 1201 arranged along the length direction of the rotating shaft 12 and an arc-shaped groove 1202 arranged along the axial direction of the rotating shaft 12, and the screw groove 1201 is connected with the arc-shaped groove 1202.

[0077] When the convex shaft 1301 slides in the screw groove 1201, the sleeve pipe 13 can move along the length direction of the rotating shaft 12.

[0078] In the embodiment, when the first frame body 1 moves relative to the second frame body 2, the supporting rod 9 can rotate relative to the first sliding sleeve 7, at this time, the supporting rod 9 can drive the sector gear ring 10 to rotate, and the sector gear ring 10 is in engagement with the gear 11, so that the rotating shaft 12 can rotate, in this process, the convex shaft 1301 cooperates with the screw groove 1201 to adjust the position of the guiding member 20 on the horizontal frame 4, so that the position of the guiding member 20 changes in the process of adjusting the distance between the crosspieces, and the distance between the crosspieces can be automatically matched with the length of the crosspieces.

[0079] Further, in the process of rotating the rotating shaft 12, when the convex shaft 1301 moves along the screw groove 1201, the sleeve pipe 13 can move along the length direction of the rotating shaft 12 and drive the guiding member 20 to move along the sliding groove 401, that is, in the process of increasing the distance between the crosspieces, the gap between the two groups of guiding members 20 arranged on the same group of horizontal frames 4 becomes smaller, thereby meeting the installation requirement that the length of the crosspieces is inversely proportional to the distance, and the inner distance between the top of the two groups of guiding members 20 is equal to the length of the crosspiece, so that the two groups of guiding members 20 can cooperate to realize the positioning of the crosspieces when the crosspieces move upwards along with the supporting frame 5.

[0080] Further, in the present application, the arc-shaped groove 1202 is provided with multiple groups, when the convex shaft 1301 moves into the arc-shaped groove 1202, the sleeve pipe 13 and the rotating shaft 12 are in a locked state, that is, at this time, the length direction of the sleeve pipe 13 and the guide 20 relative to the rotating shaft 12 is in a locked state, on the one hand, when the guide 20 is subjected to the reverse force of the crosspiece, the convex shaft 1301 acts on the side wall of the arc-shaped groove 1202 and does not cause the rotating shaft 12 to rotate, thereby improving the stability after the crosspiece spacing is adjusted, on the other hand, in this state, a crosspiece of a certain length can be matched, and the arc-shaped groove 1202 has a certain length, so that in the case of a crosspiece of a certain length, the spacing between the crosspieces can also be finely adjusted in a small range, so that in the case of matching the length and spacing of the crosspieces, the total length of the crosspieces arranged at equal intervals can be adjusted, thereby enabling the crosspieces to be evenly distributed inside the side plate, avoiding the need to add new crosspieces when the length and spacing of the crosspieces correspond, the total length of the crosspiece arrangement is less than the length of the side plate, and the difference is less than the spacing of the crosspieces, thereby avoiding the inconsistency of the bridge strength caused by the additional crosspieces and the waste of materials.

[0081] Based on the above arrangement, the automatic matching between the length of the crosspiece and the spacing of the crosspiece can be ensured, so that when the crosspiece of a corresponding length is welded, the spacing between the corresponding crosspieces can be adaptively adjusted without the need for on-site calculation and measurement, thereby reducing the amount of preparation work before welding and shortening the installation time, and for a crosspiece of a certain length, the spacing between the crosspieces can be adjusted within a small range, thereby ensuring the strength of the bridge after welding, enabling the crosspieces to be arranged at equal intervals inside the side plate, and avoiding the inconsistency of the bridge strength caused by the additional crosspieces and the waste of materials.

[0082] As an embodiment of the present application, a method for welding crosspieces using the above-mentioned bridge is also proposed, which comprises the following steps:

[0083] Step one: control the driving assembly to act, so that the minimum spacing between each group of horizontal frames 4 is maintained;

[0084] Step two: place the crosspieces to be welded on the lifting assembly, and use the elastic centering assembly to arrange the crosspieces along the length direction of the support frame 5;

[0085] Step three: control the driving assembly to act, so that each group of horizontal frames 4 is expanded at equal intervals, and the spacing between each horizontal frame 4 corresponds to the length of the crosspiece;

[0086] Step four: when the driving assembly is in action, the screw driving structure acts synchronously, so that the position of the positioning member changes;

[0087] Step five: the lifting assembly acts to drive the crosspieces to move upward, and adjusts the position of the crosspieces when they abut against the positioning member;

[0088] Step six: the clamping mechanism is actuated to move the side plate it carries towards the crosspiece until a predetermined gap is created between the side plate and the crosspiece;

[0089] Step seven: the plasma automatic welding mechanism is actuated to weld the side plate and the crosspiece.

[0090] It will be apparent to those skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. The presently disclosed embodiments are therefore considered in all respects to be illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalents of the claims are therefore intended to be embraced therein. No limitation is intended to the effect that any recited claim must include any particular element or combine any particular elements listed in that claim.

[0091] Furthermore, it should be understood that although the description herein is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description herein is made in this way only for the sake of clarity, and those skilled in the art should consider the description as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A continuous intelligent automatic plasma welding device for crosspieces of a bridge, comprising: a frame structure, which is provided with clamping mechanisms, supporting mechanisms and automatic plasma welding mechanisms; characterized in that the supporting mechanisms comprise: horizontal frames, which are provided in multiple groups and are equidistantly distributed; a driving assembly connected to the horizontal frames, which can make two adjacent groups of the horizontal frames move equidistantly when the driving assembly is in action, and which is provided with a sector gear ring; a lifting assembly arranged on the horizontal frames and used for supporting crosspieces, which can position the crosspieces when the crosspieces are lifted; a screw driving structure connected to the positioning members and the sector gear ring, which can make the positioning members stepwise move towards the horizontal frames when multiple groups of the horizontal frames move away from each other; the driving assembly comprises first and second frames arranged in parallel, and the first and second frames are connected by a first electric telescopic rod; first sliding sleeves mounted on the horizontal frames are equidistantly arranged on the second frame; the driving assembly further comprises a V-shaped hinging structure arranged between two adjacent groups of the horizontal frames, which is slidingly arranged on the first frame, and which can drive two adjacent groups of the horizontal frames to slide along the length direction of the second frame when the first and second frames move relatively; the V-shaped hinging structure comprises multiple second sliding sleeves slidingly mounted on the first frame, two groups of support rods are symmetrically and rotatably mounted on the second sliding sleeves, and the two groups of support rods are rotatably connected with the first sliding sleeves on the two sides of the second sliding sleeves, respectively; one end of the support rod away from the second sliding sleeve is fixedly connected with the sector gear ring; both sides of the horizontal frame are provided with sliding grooves along the length direction thereof, and sliding blocks are slidingly mounted in the sliding grooves; 2. The apparatus according to claim 1, wherein, the screw driving structure comprises a rotating shaft rotatably mounted on the horizontal frame and a sleeve pipe fixedly connected with the sliding blocks, one end of the rotating shaft is provided with a gear meshing with the sector gear ring, and a screw driving groove is arranged on the circumferential surface of the rotating shaft, and a convex shaft arranged on the inner wall of the sleeve pipe can slide in the screw driving groove. the lifting assembly comprises a supporting frame parallel to the horizontal frame and a second electric telescopic rod mounted on the horizontal frame, and the action end of the second electric telescopic rod is fixedly connected with the supporting frame; 3. The apparatus according to claim 2, wherein, a side of the supporting frame is provided with an elastic centering assembly, which is used for limiting the crosspieces. the elastic centering assembly comprises two groups of clamping members rotatably mounted on the side of the supporting frame, and multiple rollers are equidistantly and rotatably mounted on the side of the clamping members facing the crosspieces; an extension rod is connected with the rotating shaft of the clamping member, a cylindrical spring is rotatably mounted on the end of the extension rod, and one end of the cylindrical spring away from the extension rod is rotatably connected with the supporting frame; the clamping member is adapted with an abutting shaft mounted on the side of the supporting frame.

4. The apparatus according to claim 2, wherein, The slider is fixedly connected with the positioning member, and the slider is connected with the screw driving structure; The positioning member comprises a guide installed on the slider, and a guide inclined surface extending towards the guide is arranged on one side of the support frame.

5. The apparatus of claim 1, wherein the apparatus is a continuous, automated, plasma torch bridge rack welding system. The screw driving groove comprises a plurality of groups of step grooves arranged on the rotating shaft and connected in a head-to-tail manner, the step groove comprises a spiral groove arranged along the length direction of the rotating shaft and an arc-shaped groove arranged along the axial direction of the rotating shaft, and the spiral groove is connected with the arc-shaped groove; When the convex shaft slides in the spiral groove, the sleeve pipe can move along the length direction of the rotating shaft.

6. A method of welding a crosspiece using a continuous intelligent automated plasma welding apparatus of the crosspiece of any one of claims 1 to 5, characterized in that, The method comprises the following steps: Step one: control the driving assembly to act, so that the minimum spacing is kept between each group of horizontal frames; Step two: arrange the horizontal frame to be welded on the lifting assembly, and use the elastic centering assembly to arrange the horizontal frame along the length direction of the support frame; Step three: control the driving assembly to act, so that each group of horizontal frames are expanded equidistantly, and the spacing between each horizontal frame corresponds to the length of the horizontal frame; Step four: when the driving assembly is in action, the screw driving structure is synchronously actuated, so that the position of the positioning member is changed; Step five: the lifting assembly is actuated, so that the horizontal frame is driven to move upward, and the position of the horizontal frame is adjusted when the horizontal frame abuts against the positioning member; Step six: the clamping mechanism is actuated, so that the side plate carried thereby moves towards the horizontal frame, and a predetermined gap is generated between the side plate and the horizontal frame; Step seven: the plasma automatic welding mechanism is actuated, so that the side plate and the horizontal frame are welded.

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