A welding positioning device for steel box beam

Abstract

The present invention relates to the technical field of steel box girder welding, and specifically discloses a steel box girder welding positioning device, comprising a fixing component fixed on a bottom plate and a positioning component connected to a web, the positioning component comprising: a receiving plate slidably assembled on the fixing component up and down, a positioning member 1 for positioning the web front and back, the positioning member 1 comprising a clamping plate 1 and a clamping plate 2, the clamping plate 1 and the clamping plate 2 being slidably assembled on the receiving plate to clamp the web, racks are arranged on the clamping plate and a guide gear matched with the rack is arranged on the receiving plate, a guide rod is slidably assembled on the receiving plate, the guide rod passes through the guide gear and is threadedly matched with the guide gear, a baffle is arranged on the end of the guide rod, a limiting plate is arranged on the fixing component, and an adjusting component for adjusting the distance between the web and the bottom plate is arranged on the fixing component; the steel box girder welding positioning device of the present invention has the effect of improving welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of steel box girder welding, and in particular to a steel box girder welding positioning device. Background Art

[0002] The steel box girder is composed of the top plate, bottom plate, web plate, transverse diaphragm, longitudinal diaphragm and stiffening ribs. In the processing and manufacturing of the steel box girder, welding is an important process, which ensures the structural strength and stability of the steel box girder. Through welding, the various components of the steel box girder can be tightly connected together to form an integral structure.

[0003] A patent document with announcement number CN114535846B discloses a steel box girder welding tool, including a connecting main beam and a connecting secondary beam, a clamping mechanism is arranged at the bottom of the connecting secondary beam, the clamping mechanism includes a base, the top of the base is connected to a guide rail, a movable seat is movably installed on the guide rail, a clamping plate one is connected to one side of the top of the movable seat, an adjustment mechanism is slidably installed on one side of the clamping plate one, the adjustment mechanism includes a clamping plate two, a clamping plate three is slidably connected to one side of the clamping plate two, a lifting mechanism is connected to one side of the clamping plate three, a connecting rod is fixedly connected to the other side wall of the clamping plate two, and a push rod motor is installed on one side of the connecting rod.

[0004] However, the solution still has the following problems: the above-mentioned prior art adopts an adjustment mechanism and a lifting mechanism to clamp steel plates of different thicknesses and adjust the welding position of the steel plates according to welding requirements. However, when welding steel plates of different thicknesses, the size of the welds is the same, which will lead to uneven stress distribution inside the welds. This uneven stress distribution will increase the deformation risk of the welded joint and reduce the strength and toughness of the welded joint. Summary of the invention

[0005] The present invention provides a steel box girder welding positioning device, aiming to solve the problem in the related art that the welding quality is affected due to uneven stress distribution at the welding point caused by different thicknesses of the web.

[0006] The steel box beam welding positioning device of the present invention comprises a positioning assembly and a fixing assembly installed on a bottom plate, wherein the positioning assembly comprises: a positioning member 1, a receiving plate slidably assembled on the fixing assembly up and down, the positioning member 1 comprises a clamping plate 1 and a clamping plate 2 slidably assembled on the receiving plate forward and backward, racks are arranged on the clamping plate and a guide gear meshing with the rack is arranged on the receiving plate, a guide rod is slidably assembled on the receiving plate, the guide rod is threadedly matched with the guide gear, a baffle is arranged on the guide rod, a limiting plate is arranged on the fixing assembly, and an adjustment assembly for adjusting the distance between the web plate and the bottom plate is arranged on the fixing assembly;

[0007] The first and second clamping plates slide to clamp the web, and at the same time the guide rod drives the baffle plate away from the limit plate so that the distance between the baffle plate and the limit plate is proportional to the thickness of the web; the adjusting component drives the web to move through the supporting plate, and at the same time the baffle plate approaches the limit plate so that the distance between the web and the bottom plate is proportional to the thickness of the web.

[0008] The effect is that the present invention clamps the web plate front and back by configuring the first and second clamping plates, and the distance between the first and second clamping plates after the web plate is clamped is the same as the thickness of the web plate. When the web plate needs to be clamped and positioned, the first and second clamping plates move toward the web plate synchronously until the first and second clamping plates clamp the side surface of the web plate. At the same time, when the first clamping plate moves, the guide gear is driven to rotate by the rack, and the rotation of the guide gear drives the guide rod to move downward, and the movement of the guide rod drives the baffle plate to gradually move away from the limit plate, so that the distance between the baffle plate and the limit plate is The distance corresponds to the thickness of the web, and then the adjusting component drives the web to move through the receiving plate, leaving a weld between the web and the bottom plate for subsequent welding, and when the receiving plate moves, it drives the baffle to move toward the receiving plate again until the baffle abuts against the limit plate, so that the distance that the receiving plate drives the web away from the bottom plate is also proportional to the thickness of the web, so as to achieve proportional adjustment of the weld width according to webs of different thicknesses, so that when welding webs of different thicknesses, the stress at the welding point can be kept evenly distributed, thereby improving the welding quality.

[0009] Preferably, the fixing assembly includes a fixing seat, a pull rod and a pull sleeve. Two fixing seats are arranged on both sides of the base plate. Two pull rods are arranged corresponding to the two fixing seats respectively. The pull sleeve is arranged at the connection between the two pull rods. The pull sleeve is threadedly matched with the pull rod. A fixing plate is arranged on the fixing seat. The rotating pull sleeve drives the fixing seat to move through the pull rod. The movement of the fixed seat drives the fixing plate to abut against the side of the base plate to fix the fixing seat on the base plate.

[0010] The effect is that the rotating pull sleeve drives the pull rods closer to each other, thereby driving the fixed seat to move. The movement of the fixed seat drives the fixed plate to abut against the side of the base plate, thereby fixing the fixed seat on the base plate to facilitate subsequent positioning and adjustment of the belly plate.

[0011] Preferably, the adjustment assembly includes gear one, gear two, an adjustment screw and a bevel gear group. Gear one and gear two are meshed with each other and both are rotatably arranged on a fixed seat. Gear two is coaxially connected to the pull rod. The adjustment screw is arranged along the sliding direction of the supporting plate. The adjustment screw is rotationally matched with the fixed seat, the adjustment screw is threadably matched with the supporting plate, and the adjustment screw is connected to the pull rod through the bevel gear group.

[0012] The effect is that rotating gear two and gear one drives the pull rod to rotate, the rotation of the pull rod drives the adjusting screw to rotate through the bevel gear set, the rotation of the adjusting screw drives the connecting plate to move, the connecting plate drives the web to move through clamping plate one and clamping plate two, and then the position of the web is adjusted.

[0013] Preferably, a top block is provided on the fixed seat to slide toward the belly plate, the top block is provided close to the bottom plate, a connecting portion is provided on the top block, the connecting portion is sleeved on the outside of the pull rod, the pull rod is provided with a threaded portion that cooperates with the thread of the connecting portion, and an inclined surface is provided on the side of the top block facing away from the bottom plate. After the belly plate is separated from the bottom plate, the inclined surface abuts against the bottom of the belly plate to support the belly plate.

[0014] The effect is that when the pull rod rotates and drives the receiving plate to move, it drives the top block to move synchronously through the connection part, so that the inclined surface of the top block abuts against the bottom of the web, providing auxiliary support for the web, and further improving the stability of the web. In addition, when welding, the gap between the web and the bottom plate is welded. After the welding of the gap between the two top blocks is completed, the device is removed, that is, the top block is separated from the web, and then the final welding is performed on the support of the top block and the web.

[0015] Preferably, a sliding rod is provided between the two pull rods, the sliding rod is provided along the length direction of the pull rods, and the sliding rod is slidably provided inside the pull rods along the length direction of the pull rods.

[0016] The effect is that the slide bar is provided so that the two pull rods rotate synchronously, which can realize the simultaneous adjustment of the positions of the two receiving plates and reduce the phenomenon of the pull rods rotating when the pull sleeve is rotated, so as to adjust the position of the fixed seat.

[0017] Preferably, a hand lever is eccentrically arranged on the first gear.

[0018] The effect is that, by configuring the hand lever, the gear one can be rotated by the hand lever, thereby driving the gear two and the pull rod to rotate, thereby adjusting the position of the receiving plate.

[0019] Preferably, the positioning member 1 also includes a positioning rod 1 and a positioning rod 2, both of which are rotationally matched with the receiving plate, the positioning rod 1 is threadedly matched with the clamping plate 1, and the positioning rod 2 is threadedly matched with the clamping plate 2.

[0020] The effect is that the positioning rod 1 and the positioning rod 2 are rotated at the same time, thereby driving the clamping plate 1 and the clamping plate 2 to move simultaneously until the clamping plate 1 and the clamping plate 2 abut against the web, thereby achieving the clamping and positioning of the web.

[0021] Preferably, the positioning assembly also includes a second positioning member, which includes two positioning bolts. The two positioning bolts are respectively arranged on the receiving plates on the two fixed seats. The positioning bolts are threadedly matched with the receiving plates. The ends of the positioning bolts abut against the left and right sides of the web for positioning the left and right sides of the web.

[0022] The effect is that the two positioning bolts are rotated simultaneously so that the ends of the two positioning bolts abut against the side surfaces of the baffle at the same time, thereby positioning the web in the left-right direction.

[0023] Preferably, a plurality of grooves are formed on one side of the first and second clamping plates close to the web.

[0024] The effect is that both splint 1 and splint 2 are in contact with the web via the grooves. When splint 1 and splint 2 are in contact with the web, the friction between splint 1 and splint 2 and the web is increased via the grooves, reducing the loosening of the web between splint 1 and splint 2, thereby improving the stability of splint 1 and splint 2 when clamping the web.

[0025] Preferably, two groups of positioning components are provided, and the two groups of positioning components and the two fixing seats are provided in one-to-one correspondence.

[0026] The effect is that two sets of positioning components are provided so as to fix the web in a specified position and improve the subsequent welding accuracy.

[0027] Beneficial effects:

[0028] The present invention drives the guide gear to rotate through the rack when the web is clamped by the first and second clamping plates, and the guide gear moves up and down through the guide rod, thereby driving the baffle plate to move away from the limit plate, so that when the first and second clamping plates clamp the web, the distance between the baffle plate and the limit plate is proportional to the thickness of the web. When the supporting plate drives the web to move, the distance between the baffle plate and the limit plate is controlled to control the movement of the web, so that the distance between the web and the bottom plate is proportional to the thickness of the web, and the width of the weld corresponds to the thickness of the web, thereby ensuring uniform stress distribution at the welding point and improving the welding quality.

[0029] The present invention arranges a top block slidingly on a fixed seat. When the pull rod rotates to drive the receiving plate to move, the receiving plate drives the web to move upward, so that a gap exists between the web and the bottom plate. At the same time, the pull rod drives the top block to move horizontally toward the web through the connecting part. At the same time, the inclined surface of the top block abuts against the bottom edge of the web, thereby supporting the web and further improving the stability when welding the web. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the connection relationship between the bottom plate and the web plate in the steel box girder welding positioning device according to an embodiment of the present invention.

[0031] Figure 2 It is a schematic diagram of the connection between a fixing seat and a base plate in a steel box girder welding positioning device according to an embodiment of the present invention.

[0032] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0033] Figure 4 It is a structural schematic diagram of a fixing component in a steel box girder welding positioning device according to an embodiment of the present invention.

[0034] Figure 5 yes Figure 4 A magnified schematic diagram of point B in the middle.

[0035] Figure 6 It is a structural schematic diagram of a guide member in a steel box girder welding positioning device according to an embodiment of the present invention.

[0036] Figure 7 It is a partial exploded view of a pull sleeve and a pull rod in a steel box girder welding positioning device according to an embodiment of the present invention.

[0037] Figure 8 It is a structural schematic diagram of a slide bar in a steel box girder welding positioning device according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] 01. Bottom plate; 02. Web plate; 1. Fixing assembly; 11. Fixing seat; 111. Fixing plate; 12. Pull rod; 13. Pull sleeve; 2. Positioning assembly; 3. Adjusting assembly; 31. Gear 1; 311. Hand lever; 32. Gear 2; 33. Adjusting screw; 34. Bevel gear set; 35. Top block; 351. Inclined surface; 352. Connecting part; 4. Attaching plate; 5. Positioning piece 1; 51. Clamp 1; 52. Clamp 2; 53. Positioning rod 1; 54. Positioning rod 2; 6. Positioning piece 2; 61. Positioning bolt; 7. Groove; 8. Guide piece; 81. Rack; 82. Guide gear; 83. Guide rod; 84. Baffle; 85. Limiting plate; 9. Sliding rod. DETAILED DESCRIPTION

[0040] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0041] like Figures 1 to 8 As shown, the steel box girder welding positioning device of the present invention includes: a fixing component 1 fixed on a base plate 01, a positioning component 2 installed on the fixing component 1, and an adjusting component 3 installed on the fixing component 1, wherein the positioning component 2 is connected to a web 02, the web 02 is placed perpendicular to the base plate 01, and the adjusting component 3 is connected to the positioning component 2.

[0042] During welding, first fix the fixing component 1 on the base plate 01, fix the web 02 at the specified position through the positioning component 2, and then adjust the distance between the web 02 and the base plate 01 through the positioning component 2, that is, adjust the weld between the web 02 and the base plate 01, and then weld. After welding is completed, move the position of the fixing component 1 and repeat the above operation to weld the next web 02.

[0043] Reference Figures 2 to 5 The fixing assembly 1 includes: a pair of fixing seats 11 arranged on both sides of the base plate 01, pull rods 12 respectively arranged on the two fixing seats 11, and a pull sleeve 13 sleeved on the outside of the two pull rods 12. A fixing plate 111 is arranged on the fixing seat 11, and the fixing plate 111 corresponds to the side of the base plate 01. The pull sleeve 13 is sleeved at the connection between the two pull rods 12. Two thread grooves with opposite thread directions are respectively provided in the pull sleeve 13 corresponding to the two pull rods 12. The pull rod 12 is provided with a thread that matches the thread groove in the pull sleeve 13, that is, the pull rod 12 is threadedly connected with the pull sleeve 13.

[0044] When the pull sleeve 13 is rotated, the pull sleeve 13 simultaneously drives the two pull rods 12 to approach each other, and then pulls the two fixed seats 11 to approach each other, until the fixed plate 111 abuts against the side of the bottom plate 01, and the fixed seat 11 is fixed on the bottom plate 01. In order to improve the stability of the matching between the fixed seat 11 and the bottom plate 01, two groups of pull rods 12 and pull sleeves 13 are provided, and the two groups of pull sleeves 13 and connecting rods are respectively provided on both sides of the web 02, so that the fixed seat 11 is evenly stressed, and the stability of the fixed seat 11 is improved, so as to facilitate subsequent welding.

[0045] Reference Figure 2 , Figure 3 and Figure 5 , two groups of positioning components 2 are provided, and the two groups of positioning components 2 are respectively provided on two fixing seats 11. The positioning components 2 include: a receiving plate 4 connected to the fixing seat 11, a positioning member 1 5 for front and rear positioning of the web 02, and a positioning member 2 6 for left and right positioning of the web 02, and the positioning member 1 5 and the positioning member 2 6 are both installed on the receiving plate 4. After the web 02 is placed between the receiving plates 4, the positioning member 1 5 and the positioning member 2 6 are used to position the web 02 in the front and rear directions and in the left and right directions.

[0046] Reference Figure 2 , Figure 4 and Figure 5 The positioning member 1 5 includes: a clamping plate 1 51 and a clamping plate 2 52 which are slidably assembled on the receiving plate 4, a positioning rod 1 53 which is threadedly matched with the clamping plate 1 51, and a positioning rod 2 54 which is threadedly matched with the clamping plate 2 52. The positioning rod 1 53 and the positioning rod 2 54 are both rotationally matched with the receiving plate 4, and the positioning rod 1 53 and the positioning rod 2 54 are arranged on the same straight line, and the positioning rod 1 53 and the positioning rod 2 54 are both arranged along the sliding direction of the clamping plate 1 51. In the initial state, the clamping plate 1 51 and the clamping plate 2 52 are arranged at intervals, and the web 02 is placed between the clamping plate 1 51 and the clamping plate 2 52, and then the positioning rod 1 53 and the positioning rod 2 54 are rotated at the same time, driving the clamping plate 1 51 and the clamping plate 2 52 to approach the web 02 at the same time, until the clamping plate 1 51 and the clamping plate 2 52 are simultaneously in contact with the web 02, so as to realize the positioning of the web 02 in the front-back direction.

[0047] Reference Figure 7A plurality of grooves 7 are provided on one side of the first and second splints 51 and 52 close to the web 02. The plurality of grooves 7 are arranged along the vertical direction on the first and second splints 51 and 52. The first and second splints 51 and 52 abut against the web 02 through the grooves 7. By providing the grooves 7, the friction between the first and second splints 51 and 52 and the web 02 is increased, thereby improving the stability of the web 02.

[0048] Reference Figure 2 , Figure 3 and Figure 6 The second positioning member 6 includes positioning bolts 61 respectively installed on the two receiving plates 4. The positioning bolts 61 penetrate the receiving plates 4 and are threadedly matched with the receiving plates 4. The ends of the positioning bolts 61 abut against the left and right sides of the web 02. After the web 02 is placed between the receiving plates 4, the positioning bolts 61 are rotated at the same time until both positioning bolts 61 abut against the sides of the web 02, thereby completing the left and right positioning of the web 02.

[0049] Reference Figure 3 , Figure 4 and Figure 7 The adjusting assembly 3 includes: a gear 1 31 and a gear 2 32 rotatably assembled on the fixed seat 11, an adjusting screw 33 rotatably assembled on the fixed seat 11, a bevel gear set 34 for connecting the pull rod 12 and the adjusting screw 33, and a guide member 8. The gear 1 31 is meshed with the gear 2 32, and the gear 2 32 is coaxially connected with the pull rod 12. The adjusting screw 33 is arranged in a direction perpendicular to the base plate 01. The receiving plate 4 slides on the fixed seat 11 in a direction perpendicular to the base plate 01. The adjusting screw 33 is threadedly matched with the receiving plate 4, that is, the rotation of the adjusting screw 33 can drive the receiving plate 4 to slide in a direction perpendicular to the base plate 01. A hand lever 311 is eccentrically arranged on the gear 1 31. The guide member 8 is arranged on the receiving plate 4. The guide member 8 is used to limit the up and down movement distance of the receiving plate 4, so that the up and down movement distance is proportional to the thickness of the web 02.

[0050] After the positioning member 1 5 and the positioning member 2 6 have positioned and fixed the web 02, the side of the web 02 is now in contact with the bottom plate 01, and the gear 1 31 and the gear 2 32 are rotated by the hand lever 311, and the pull rod 12 is driven to rotate at the same time. The rotation of the pull rod 12 drives the adjusting screw 33 to rotate through the bevel gear set 34, and the adjusting screw 33 rotates the receiving plate 4 to move in a direction away from the bottom plate 01, and drives the web 02 away from the bottom plate 01 at the same time. Under the action of the guide member 8, the web 02 stops moving after it moves to a certain distance from the bottom plate 01, so that the distance between the web 02 and the bottom plate 01 is proportional to the thickness of the web 02, so as to facilitate subsequent welding.

[0051] Reference Figure 6 and Figure 7The guide member 8 includes: a rack 81 connected to the first clamp plate 51 and the second clamp plate 52 respectively, a guide gear 82 rotatably assembled on the receiving plate 4, a guide rod 83 slidably assembled on the receiving plate 4, a baffle 84 connected to the guide rod 83, and a limit plate 85 connected to the fixed seat 11. The rack 81 is arranged along the sliding direction of the first clamp plate 51, the rack 81 is meshed with the guide gear 82, the guide rod 83 is arranged along the sliding direction of the receiving plate 4, the guide rod 83 penetrates the guide gear 82, and the guide rod 83 and the guide gear 82 are threadedly matched, that is, the rotation of the guide gear 82 can drive the guide rod 83 to move up and down, and the guide rod 83 penetrates the limit plate 85 and is connected to the baffle 84.

[0052] After the first clamping plate 51 and the second clamping plate 52 are in contact, the distance between them is the thickness of the web 02 . In the initial state, the baffle 84 is in contact with the limit plate 85. When the splint 1 51 and the splint 2 52 move to abut against the web 02, the splint 1 51 and the splint 2 52 drive the rack 81 to move, and the rack 81 drives the guide gear 82 to rotate. The rotation of the guide gear 82 drives the guide rod 83 to move, and the guide rod 83 drives the baffle 84 away from the limit plate 85, so that the distance between the baffle 84 and the limit plate 85 is proportional to the thickness of the web 02. When the supporting plate 4 is adjusted to be away from the bottom plate 01, the baffle 84 is driven close to the limit plate 85. After the baffle 84 abuts against the limit plate 85, the position of the web 02 is adjusted, and then the adjustment distance of the supporting plate 4 is proportional to the thickness of the web 02, so that the weld between the web 02 and the bottom plate 01 is proportional to the thickness of the web 02, so as to facilitate subsequent welding and improve the welding strength.

[0053] Reference Figure 6 and Figure 7 The adjustment component 3 also includes a top block 35, and a slope 351 is provided on the side of the top block 35 facing away from the bottom plate 01. The top block 35 slides on the fixed seat 11 in the direction toward the web 02. The top block 35 is arranged close to the bottom plate 01. A connecting portion 352 is provided on the top block 35, and the connecting portion 352 is sleeved on the outside of the pull rod 12. A threaded portion is provided on the pull rod 12 at a position corresponding to the connecting portion 352, and the pull rod 12 is threadedly matched with the connecting portion 352 through the threaded portion.

[0054] When the pull rod 12 rotates to drive the web 02 away from the bottom plate 01, the top block 35 moves accordingly, and the top block 35 moves to its inclined surface 351 abuts against the bottom edge of the web 02 to support the web 02, further improving the stability of the web 02 and improving the subsequent welding accuracy.

[0055] Reference Figure 7 and Figure 8A slide bar 9 is provided between the two tie rods 12. The slide bar 9 is slidably provided inside the tie rod 12 along the length direction of the tie rod 12. The slide bar 9 is simultaneously assembled inside the two tie rods 12, so that when one of the tie rods 12 rotates, the other tie rod 12 can be driven to rotate simultaneously, and the two receiving plates 4 can be adjusted simultaneously. The slide bar 9 can be provided simultaneously to prevent the two tie rods 12 from rotating relative to each other, and improve the stability of the cooperation between the fixing seat 11 and the bottom plate 01.

[0056] In addition, when the pull sleeve 13 is rotated to adjust the position of the fixed seat 11 , the pull rod 12 is fixed to reduce the phenomenon that the pull rod 12 rotates with the pull sleeve 13 , so that the position of the fixed seat 11 can be adjusted through the pull rod 12 .

[0057] The implementation principle of the present invention is as follows: the web 02 is fixed on the receiving plate 4 by means of positioning member 1 5 and positioning member 2 6, and when the clamping plate 1 51 and the clamping plate 2 52 move to clamp the web 02, the baffle plate 84 simultaneously moves away from the limiting plate 85, and after the clamping plate 1 51 and the clamping plate 2 52 abut against the web 02, the distance between the baffle plate 84 and the limiting plate 85 is proportional to the thickness of the web 02, and then the gear 1 31 is rotated to drive the pull rod 12 to rotate, and the pull rod 12 drives the receiving plate 4 to move through the bevel gear set 34 until the baffle plate 84 abuts against the limiting plate 85 again, at which time the distance between the web 02 and the bottom plate 01, that is, the size of the weld, is proportional to the thickness of the web 02, so as to facilitate subsequent welding, and at the same time reduce the deformation phenomenon at the weld after welding, thereby improving the welding quality.

[0058] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A steel box girder welding positioning device, characterized in that: include: A fixing component fixed on the bottom plate, a positioning component installed on the fixing component, and an adjusting component installed on the fixing component, wherein the adjusting component is connected to the positioning component, the positioning component is used to fix the web, and the adjusting component is used to adjust the distance between the bottom plate and the web; The fixing assembly includes a fixing seat; The positioning assembly includes: a receiving plate slidably assembled on the fixing seat, and a positioning member 1 installed on the receiving plate, wherein the positioning member 1 includes a clamping plate 1 and a clamping plate 2 slidably assembled on the receiving plate; The adjusting assembly includes: an adjusting screw rotatably assembled on a fixed seat, a guiding piece arranged on a receiving plate, the adjusting screw being arranged in a direction perpendicular to the bottom plate, the adjusting screw being rotatably matched with the fixed seat, the adjusting screw being threadably matched with the receiving plate, and the rotation of the adjusting screw can drive the receiving plate to slide in a direction perpendicular to the bottom plate; the guiding piece includes: a rack, a guide gear rotatably assembled on the receiving plate, a guiding rod penetrating the guiding gear and threadably matched with the guiding gear, a baffle connected with the guiding rod, and a limit plate connected with the fixed seat, the first clamping plate and the second clamping plate are both provided with a rack, the rack is meshed with the guiding gear, the guiding rod is arranged in a sliding direction of the receiving plate, the rotation of the guiding gear can drive the guiding rod to move up and down, and the guiding rod penetrates the limit plate and is connected with the baffle; While the first and second splints slide to clamp the web, the guide rod drives the baffle plate away from the limit plate. When the first and second splints move to abut against the web, the distance between the baffle plate and the limit plate is proportional to the thickness of the web; the adjustment component drives the receiving plate to move while driving the web to move by rotating the adjusting screw, and makes the baffle plate close to the limit plate. When the baffle plate abuts against the limit plate, the distance between the web and the bottom plate is proportional to the thickness of the web.

2. The steel box girder welding positioning device according to claim 1, characterized in that: There are two fixing seats, which are respectively arranged on both sides of the base plate. The fixing assembly also includes pull rods respectively arranged on the two fixing seats, and pull sleeves sleeved on the outside of the two pull rods. The pull sleeves are sleeved at the connection between the two pull rods, and the pull sleeves are threadedly matched with the pull rods. A fixing plate is arranged on the fixing seat, and the pull sleeve drives the fixing seat to move through the pull rod. The movement of the fixing seat drives the fixing plate to abut against the side of the base plate to fix the fixing seat on the base plate.

3. The steel box girder welding positioning device according to claim 2, characterized in that: The adjusting assembly includes gear one, gear two and a bevel gear set. Gear one and gear two are meshed with each other and both are rotatably arranged on a fixed seat. Gear two is coaxially connected to the pull rod. The adjusting screw is arranged along the sliding direction of the receiving plate. The adjusting screw and the pull rod are connected through the bevel gear set.

4. The steel box girder welding positioning device according to claim 3, characterized in that: A top block is provided on the fixed seat to slide toward the belly plate. The top block is provided close to the bottom plate. A connecting portion is provided on the top block. The connecting portion is sleeved on the outside of the pull rod. The pull rod is provided with a threaded portion that cooperates with the thread of the connecting portion. An inclined surface is provided on the side of the top block away from the bottom plate. After the belly plate is separated from the bottom plate, the inclined surface abuts against the bottom of the belly plate to support the belly plate.

5. The steel box girder welding positioning device according to claim 3, characterized in that: A sliding rod is arranged between the two pull rods, and the sliding rod is slidably arranged inside the pull rods along the length direction of the pull rods.

6. The steel box girder welding positioning device according to claim 3, characterized in that: A hand lever is eccentrically arranged on the gear.

7. The steel box girder welding positioning device according to claim 1, characterized in that: The positioning member 1 also includes a positioning rod 1 and a positioning rod 2. Both the positioning rod 1 and the positioning rod 2 are rotationally matched with the receiving plate. The positioning rod 1 is threadedly matched with the clamping plate 1, and the positioning rod 2 is threadedly matched with the clamping plate 2.

8. The steel box girder welding positioning device according to claim 2, characterized in that: The positioning assembly also includes positioning member 2, which includes positioning bolts respectively installed on two receiving plates. The positioning bolts penetrate the receiving plates and cooperate with the receiving plate threads. The ends of the positioning bolts abut against the left and right sides of the web.

9. The steel box girder welding positioning device according to claim 7, characterized in that: A plurality of grooves are provided on one side of the first clamping plate and the second clamping plate close to the web.

10. The steel box girder welding positioning device according to claim 2, characterized in that: There are two groups of positioning components, and the two groups of positioning components and the two fixing seats are arranged in one-to-one correspondence.

Images