Steel bar welding and butting device for civil construction

Abstract

The utility model discloses a reinforcing steel bar welding and butting device for civil construction, and belongs to the technical field of civil construction equipment. The problems that a traditional steel bar butt joint mode depends on manual operation, time and labor are consumed, and the butt joint precision is difficult to guarantee are solved. The fine adjustment butt joint assembly is arranged in the middle of the upper end face of the workbench, the two positive and negative tooth lead screw transmission mechanisms are symmetrically arranged on the front side and the rear side of the fine adjustment butt joint assembly, the two rotating motors drive the two positive and negative tooth lead screw transmission mechanisms to conduct transmission correspondingly, and the two movable butt joint assemblies are symmetrically arranged on the left side and the right side of the fine adjustment butt joint assembly in a sliding mode correspondingly. The two movable butt-joint assemblies are fixedly connected with the corresponding positive and negative tooth lead screw transmission mechanisms correspondingly, the two adjusting and supporting assemblies are symmetrically arranged on the left side and the right side of the two movable butt-joint assemblies correspondingly, and the fine adjusting butt-joint assembly, the two adjusting and supporting assemblies and the two movable butt-joint assemblies are arranged on the same axis. According to the utility model, the stable and accurate movement of the movable butt-joint assembly is realized, and the butt-joint efficiency of the reinforcing steel bars is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to civil engineering construction equipment technical field especially relates to a civil engineering construction is with reinforcing steel bar welding butt joint device. BACKGROUND

[0002] In the civil engineering construction process, the butt joint of reinforcing steel bar is indispensable when reinforcing steel bar is welded, and the precision and efficiency of butt joint directly affect the quality of reinforcing steel bar welding and the safety and progress of the whole project. The traditional reinforcing steel bar butt joint mode often relies on manual operation, which not only consumes time and effort, but also cannot guarantee the butt joint precision. Therefore, it is particularly important to develop a device capable of automatically and accurately completing the butt joint of reinforcing steel bar. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a civil engineering construction is with reinforcing steel bar welding butt joint device to solve the problem that the traditional reinforcing steel bar butt joint mode relies on manual operation, which not only consumes time and effort, but also cannot guarantee the butt joint precision.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme as follows: a civil engineering construction is with reinforcing steel bar welding butt joint device, including workbench, fine adjustment butt joint assembly, two positive and negative tooth screw rod transmission mechanisms, two rotating motors, two adjusting support assemblies and two moving butt joint assemblies, the fine adjustment butt joint assembly, two positive and negative tooth screw rod transmission mechanisms, two adjusting support assemblies and two moving butt joint assemblies are all arranged on the upper end face of the workbench, the fine adjustment butt joint assembly is arranged in the middle of the upper end face of the workbench, two positive and negative tooth screw rod transmission mechanisms are arranged along the length direction of the workbench respectively, two positive and negative tooth screw rod transmission mechanisms are symmetrically arranged on the front and back of the fine adjustment butt joint assembly, two rotating motors are arranged on the corresponding positive and negative tooth screw rod transmission mechanisms respectively and drive the positive and negative tooth screw rod transmission mechanisms to transmit, two moving butt joint assemblies are arranged to slide left and right along the length direction of the workbench respectively, two moving butt joint assemblies are symmetrically arranged on the left and right sides of the fine adjustment butt joint assembly, the front and back ends of two moving butt joint assemblies are fixedly connected with the corresponding positive and negative tooth screw rod transmission mechanisms respectively, two adjusting support assemblies are symmetrically arranged in the middle of the left and right ends of the upper end face of the workbench and are located on the left and right sides of two moving butt joint assemblies respectively, the fine adjustment butt joint assembly, two adjusting support assemblies and two moving butt joint assemblies are arranged on the same axis.

[0005] Further, the adjusting support assembly includes a support plate, a support seat and two limiting telescopic rods, the support plate is arranged along the width direction of the workbench, the two limiting telescopic rods are vertically arranged on the front and back ends of the lower end face of the support plate respectively, the lower ends of the two limiting telescopic rods are fixedly connected with the upper end face of the workbench, the support seat is arranged on the support plate, and an arc-shaped groove is arranged on the upper end face of the support seat.

[0006] Further, the mobile docking assembly comprises a mobile base and a mobile docking unit, two slide grooves are symmetrically formed in the upper end face of the workbench along the length direction of the workbench, the lower end of the mobile base is slidably arranged in the corresponding slide groove, the front and rear end faces of the mobile base are fixedly connected with the corresponding nuts on the forward and reverse toothed lead screw transmission mechanisms through connecting rods, and the mobile docking unit is arranged on the mobile base along the width direction of the workbench.

[0007] Further, the mobile docking unit comprises a lower fixed seat one, an upper clamping piece one, a positioning bolt, a positioning pin and an arc-shaped positioning piece, the lower fixed seat one is arranged on the mobile base along the width direction of the workbench, a semicircular groove one is arranged on the upper end face of the lower fixed seat one, one end of the upper clamping piece one is hingedly connected with one side of the upper end of the lower fixed seat one, the other end of the upper clamping piece one is locked with the other side of the upper end of the lower fixed seat one through locking pieces, a semicircular groove two is arranged on the lower end face of the upper clamping piece one, the semicircular groove one and the semicircular groove two have the same radius, when the upper clamping piece one is in the locked state with the lower fixed seat one, the semicircular groove one and the semicircular groove two form a cylindrical placement space one, a through hole one is vertically arranged in the middle of the upper end face of the upper clamping piece one, a through hole two is horizontally arranged in the middle of the front end face of the upper clamping piece one, the lower end of the positioning bolt is fixedly connected with the middle of the upper end face of the arc-shaped positioning piece through the through hole one, a plurality of positioning holes are horizontally arranged on the shank of the positioning bolt along the vertical direction, the positioning holes are matched with the through hole two, and the positioning pin is sequentially positioned through the through hole two and the corresponding positioning holes on the shank.

[0008] Further, the fine adjustment docking assembly comprises an operation table and two fine adjustment docking units, the operation table is arranged on the middle of the upper end face of the workbench, and the two fine adjustment docking units are symmetrically arranged on the operation table along the width direction of the workbench.

[0009] Further, the fine adjustment docking unit comprises a lower fixed seat two, an upper clamping piece two and a plurality of adjusting bolts, the lower fixed seat two is arranged on the operation table along the width direction of the workbench, a semicircular groove three is arranged on the upper end face of the lower fixed seat two, one end of the upper clamping piece two is hingedly connected with one side of the upper end of the lower fixed seat two, the other end of the upper clamping piece two is locked with the other side of the upper end of the lower fixed seat two through locking pieces, a semicircular groove four is arranged on the lower end face of the upper clamping piece two, the semicircular groove three and the semicircular groove four have the same radius, when the upper clamping piece two is in the locked state with the lower fixed seat two, the semicircular groove three and the semicircular groove four form a cylindrical placement space two, the cylindrical placement space two is arranged on the same axis as the cylindrical placement space one, and the plurality of adjusting bolts are arranged on the side walls of the lower fixed seat two and the upper clamping piece two along the circumferential direction of the cylindrical placement space two and are threadedly connected with the lower fixed seat two and the upper clamping piece two.

[0010] Compared with the prior art, the mobile docking assembly has the advantages that:

[0011] 1. The utility model discloses a stable and accurate movement of the mobile butt joint assembly is realized through the cooperation of the forward and reverse tooth screw rod transmission mechanism and the rotating motor, and the efficiency of steel butt joint is improved.

[0012] 2. The utility model discloses the design of the adjusting support assembly and the mobile butt joint assembly makes steel keep stable during butt joint, avoids the shake and misplacement during butt joint.

[0013] 3. The utility model discloses the setting of the fine adjustment butt joint assembly can carry out the last fine adjustment butt joint of steel, ensures the accuracy and firmness of butt joint.

[0014] 4. The utility model discloses the whole structure design is reasonable, and the operation is simple, and is applicable to various civil construction sites. DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the utility model;

[0016] Figure 2 It is the plan view of the utility model;

[0017] Figure 3 It is the structure schematic diagram of adjusting support assembly;

[0018] Figure 4 It is the structure schematic diagram of mobile butt joint unit;

[0019] Figure 5 It is the structure schematic diagram of fine adjustment butt joint unit.

[0020] The component name and drawing mark involved in the above drawing are as follows:

[0021] 1, workbench, 2, forward and reverse tooth screw rod transmission mechanism, 3, adjusting support assembly, 4, rotating motor, 5, fine adjustment butt joint assembly, 6, mobile butt joint assembly, 7, sliding slot, 8, nut, 9, connecting rod, 10, operation table, 11, fine adjustment butt joint unit, 12, mobile base, 13, mobile butt joint unit, 14, limit telescopic link, 15, support plate, 16, support seat, 17, lower fixed seat one, 18, upper clamp piece one, 19, positioning bolt, 20, positioning hole, 21, positioning pin, 22, arc-shaped positioning sheet, 23, lower fixed seat two, 24, upper clamp piece two, 25, adjusting bolt. DETAILED DESCRIPTION

[0022] Clearly, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the range of the utility model protection.

[0023] Specific implementation Figures 1-5 As shown in the utility model discloses a civil construction steel bar welding butt joint device, including workbench 1, fine adjustment butt joint subassembly 5, two positive and negative tooth screw rod drive mechanism 2, two rotating motor 4, two adjustment support subassembly 3 and two mobile butt joint subassembly 6, fine adjustment butt joint subassembly 5, two positive and negative tooth screw rod drive mechanism 2, two adjustment support subassembly 3 and two mobile butt joint subassembly 6 are all set on the upper end surface of workbench 1, fine adjustment butt joint subassembly 5 is set in the middle part of the upper end surface of workbench 1, two positive and negative tooth screw rod drive mechanism 2 is set along the length direction of workbench 1 respectively, two positive and negative tooth screw rod drive mechanism 2 is symmetrically set on the front and back of fine adjustment butt joint subassembly 5, two rotating motor 4 is set on corresponding positive and negative tooth screw rod drive mechanism 2 respectively and drives positive and negative tooth screw rod drive mechanism 2 transmission, two mobile butt joint subassembly 6 is set to slide along the length direction of workbench 1 left and right respectively, two mobile butt joint subassembly 6 is symmetrically set on the left and right sides of fine adjustment butt joint subassembly 5, and the front and back ends of two mobile butt joint subassembly 6 are fixedly connected with corresponding positive and negative tooth screw rod drive mechanism 2 respectively, two adjustment support subassembly 3 is symmetrically set in the middle part of the left and right ends of the upper end surface of workbench 1 respectively and is located on the left and right sides of two mobile butt joint subassembly 6 respectively, fine adjustment butt joint subassembly 5, two adjustment support subassembly 3 and two mobile butt joint subassembly 6 are arranged on the same axis.

[0024] Further, the adjustment support subassembly 3 includes a support plate 15, a support seat 16, and two limiting telescopic rods 14. The support plate 15 is arranged along the width direction of the workbench 1. The two limiting telescopic rods 14 are vertically arranged at the front and back ends of the lower end surface of the support plate 15. The lower ends of the two limiting telescopic rods 14 are fixedly connected with the upper end surface of the workbench 1. The support seat 16 is arranged on the support plate 15. An arc-shaped groove is arranged on the upper end surface of the support seat 16.

[0025] Further, the mobile butt joint subassembly 6 includes a mobile base 12 and a mobile butt joint unit 13. Two sliding grooves 7 are symmetrically formed on the upper end surface of the workbench 1 along the length direction of the workbench 1. The mobile base 12 is slidably arranged in the corresponding sliding groove 7. The front and back end surfaces of the mobile base 12 are fixedly connected with the screw nut 8 on the corresponding positive and negative tooth screw rod drive mechanism 2 through the connecting rod 9. The mobile butt joint unit 13 is arranged on the mobile base 12 along the width direction of the workbench 1.

[0026] Further, the mobile docking unit 13 comprises a lower fixed seat 17, an upper clamping piece 18, a positioning bolt 19, a positioning pin 21 and an arc-shaped positioning piece 22. The lower fixed seat 17 is arranged on the mobile base 12 along the width direction of the workbench 1. The upper end surface of the lower fixed seat 17 is provided with a semicircular groove 1. One end of the upper clamping piece 18 is hingedly connected to one side of the upper end of the lower fixed seat 17. The other end of the upper clamping piece 18 is locked to the other side of the upper end of the lower fixed seat 17 by a locking piece. The lower end surface of the upper clamping piece 18 is provided with a semicircular groove 2. The radius of the semicircular groove 1 is the same as that of the semicircular groove 2. When the upper clamping piece 18 is in a locked state with the lower fixed seat 17, the semicircular groove 1 and the semicircular groove 2 form a cylindrical placement space 1. A through hole 1 is vertically arranged in the middle of the upper end surface of the upper clamping piece 18. A through hole 2 is horizontally arranged in the middle of the front end surface of the upper clamping piece 18. The lower end of the positioning bolt 19 vertically penetrates through the through hole 1 and is fixedly connected to the middle of the upper end surface of the arc-shaped positioning piece 22. A plurality of positioning holes 20 are horizontally arranged on the shank of the positioning bolt 19. The positioning holes 20 are matched with the through hole 2. During positioning, the positioning pin 21 penetrates through the through hole 2 and the corresponding positioning hole 20 on the shank of the positioning bolt 19 in sequence.

[0027] Further, the fine adjustment docking assembly 5 comprises an operation table 10 and two fine adjustment docking units 11. The operation table 10 is arranged on the middle of the upper end surface of the workbench 1. The two fine adjustment docking units 11 are symmetrically arranged on the operation table 10 along the width direction of the workbench 1.

[0028] Further, the fine adjustment docking unit 11 comprises a lower fixed seat 23, an upper clamping piece 24 and a plurality of adjustment bolts 25. The lower fixed seat 23 is arranged on the operation table 10 along the width direction of the workbench 1. The upper end surface of the lower fixed seat 23 is provided with a semicircular groove 3. One end of the upper clamping piece 24 is hingedly connected to one side of the upper end of the lower fixed seat 23. The other end of the upper clamping piece 24 is locked to the other side of the upper end of the lower fixed seat 23 by a locking piece. The lower end surface of the upper clamping piece 24 is provided with a semicircular groove 4. The radius of the semicircular groove 3 is the same as that of the semicircular groove 4. When the upper clamping piece 24 is in a locked state with the lower fixed seat 23, the semicircular groove 3 and the semicircular groove 4 form a cylindrical placement space 2. The cylindrical placement space 2 is arranged on the same axis as the cylindrical placement space 1. The plurality of adjustment bolts 25 are arranged on the side walls of the lower fixed seat 23 and the upper clamping piece 24 along the circumference of the cylindrical placement space 2 and are threadedly connected with the lower fixed seat 23 and the upper clamping piece 24.

[0029] Preparation of the workbench 1:

[0030] Firstly, place the workbench 1 stably on the construction site, ensuring that it is level and stable. On the upper end surface of the workbench 1, symmetrically open two sliding grooves 7 along the length direction for installing the mobile base 12.

[0031] Installation of the forward and reverse toothed screw rod transmission mechanism 2:

[0032] Two positive and negative toothed screw drive mechanisms 2 are installed along the length direction of the workbench 1, ensuring that they are symmetrically distributed on the front and back sides of the fine adjustment butt joint assembly 5.

[0033] The rotating motor 4 is installed on the corresponding positive and negative toothed screw drive mechanism 2, and is connected to the power supply, ensuring that the motor can drive the screw to rotate normally.

[0034] Adjusting support assembly 3 installation:

[0035] Two adjusting support assemblies 3 are installed on the left and right ends of the upper end surface of the workbench 1, ensuring that they are respectively located on the left and right sides of the two moving butt joint assemblies 6.

[0036] Two limiting extension rods 14 are vertically installed on the front and back ends of the lower end surface of the support plate 15, and the lower end of the limiting extension rod 14 is fixedly connected to the upper end surface of the workbench 1.

[0037] An arc-shaped groove is formed on the upper end surface of the support seat 16 for supporting the steel bar.

[0038] Moving butt joint assembly 6 installation:

[0039] Two moving bases 12 are respectively slidably installed in the corresponding sliding grooves 7, ensuring that they can smoothly slide along the length direction of the workbench 1.

[0040] The connecting rods 9 are respectively installed on the front and back end surfaces of the moving bases 12 and are fixedly connected to the nuts 8 on the corresponding positive and negative toothed screw drive mechanisms 2.

[0041] The moving butt joint unit 13 is installed on the moving base 12 along the width direction of the workbench 1 for clamping the steel bar.

[0042] Fine adjustment butt joint assembly 5 installation:

[0043] The operation table 10 is installed on the middle part of the upper end surface of the workbench 1.

[0044] Two fine adjustment butt joint units 11 are symmetrically installed on the operation table 10 along the width direction of the workbench 1 for fine adjustment butt joint of the steel bar.

[0045] Each component debugging:

[0046] After completing the installation of all components, the whole machine is debugged to ensure that each component can work normally, and the moving butt joint assembly 6 and the fine adjustment butt joint assembly 5 can accurately and smoothly move and butt joint the steel bar.

[0047] Working principle:

[0048] The working principle of the utility model mainly depends on the transmission of the positive and negative toothed screw transmission mechanism 2, the driving of the rotating motor 4 and the cooperation of each component. Through the driving of the rotating motor 4, the positive and negative toothed screw transmission mechanism 2 can drive the two mobile butt joint assemblies 6 to move stably along the length direction of the workbench 1. At the same time, through the fine adjustment of the two fine adjustment butt joint assemblies 5, the accurate butt joint of the steel bars can be ensured.

[0049] Working process and steps:

[0050] Steel bar preparation:

[0051] Place one end of the steel bar to be butt jointed in the cylindrical placement space one in the mobile butt joint unit 13 of the mobile butt joint assembly 6, lock the mobile butt joint unit 13, adjust the position of the positioning bolt 19, fix the arc-shaped positioning piece 22 to the steel bar, and then position it through the positioning pin 21. Place the other end of the steel bar to be butt jointed in the arc-shaped groove on the support seat 16 of the adjusting support assembly 3. The limiting telescopic rod 14 can adjust the up and down position to adapt to the steel bar, and keep the steel bar horizontal.

[0052] The other steel bar to be butt jointed is fixed in the same way.

[0053] Mobile butt joint:

[0054] Start the two rotating motors 4 at the same time, drive the two positive and negative toothed screw transmission mechanisms 2, and then drive the two mobile butt joint assemblies 6 to move along the length direction of the workbench 1.

[0055] According to the length of the steel bar and the butt joint requirement, adjust the position of the mobile butt joint assembly 6, so that the two steel bars to be butt jointed complete the preliminary butt joint.

[0056] Fine adjustment butt joint:

[0057] When the two mobile butt joint assemblies 6 approach the butt joint position of the steel bar on the adjusting support assembly 3, stop the rotating motor 4. At this time, the ends of the two steel bars to be butt jointed are respectively located in the corresponding fine adjustment butt joint assemblies 5, and the two steel bars are fine adjusted and butt jointed through the two fine adjustment butt joint assemblies 5. After locking the fine adjustment butt joint unit 11, rotate the plurality of adjusting bolts 25, so as to realize the accurate fine adjustment of the butt joint ends of the two steel bars, and ensure that the fine adjusted steel bar butt joint position is accurate and firm.

[0058] Welding operation:

[0059] After completing the fine adjustment butt joint, carry out the welding operation. Use the welding equipment to weld the butt joint part of the steel bar, and ensure the firm connection of the steel bar.

[0060] Complete butt joint:

[0061] After the welding operation is completed, the butt joint quality and firmness of the reinforcing steel bars are checked.

[0062] The welding butt joint device has the advantages of compact structure, simple operation and accurate butt joint.

[0063] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being indicated by the appended claims rather than that of the above description, and all changes coming within the meaning and range of equivalency of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0064] Furthermore, it should be understood that although the present specification is described in terms of exemplary embodiments, not every implementation embodies only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that those skilled in the art can understand.

Claims

1. A reinforcing steel bar welding butt joint device for civil engineering construction, characterized by: The workbench (1), the fine adjustment docking assembly (5), the two positive and negative toothed screw transmission mechanisms (2), the two rotating motors (4), the two adjustment support assemblies (3) and the two moving docking assemblies (6) are arranged on the upper end face of the workbench (1), the fine adjustment docking assembly (5) is arranged on the middle part of the upper end face of the workbench (1), the two positive and negative toothed screw transmission mechanisms (2) are arranged along the length direction of the workbench (1) respectively, the two positive and negative toothed screw transmission mechanisms (2) are symmetrically arranged on the front and back sides of the fine adjustment docking assembly (5), the two rotating motors (4) are arranged on the corresponding positive and negative toothed screw transmission mechanisms (2) respectively and drive the positive and negative toothed screw transmission mechanisms (2) to transmit, the two moving docking assemblies (6) are arranged to slide along the length direction of the workbench (1) left and right respectively, the two moving docking assemblies (6) are symmetrically arranged on the left and right sides of the fine adjustment docking assembly (5), the front and back ends of the two moving docking assemblies (6) are fixedly connected with the corresponding positive and negative toothed screw transmission mechanisms (2) respectively, and the two adjustment support assemblies (3) are symmetrically arranged on the middle parts of the left and right ends of the upper end face of the workbench (1) respectively and are located on the left and right sides of the two moving docking assemblies (6) respectively, the fine adjustment docking assembly (5), the two adjustment support assemblies (3) and the two moving docking assemblies (6) are arranged on the same axis.

2. The butt welding device for reinforcing steel bars for civil construction according to claim 1, characterized in that: The adjustment support assembly (3) comprises a support plate (15), a support seat (16) and two limiting telescopic rods (14), the support plate (15) is arranged along the width direction of the workbench (1), the two limiting telescopic rods (14) are vertically arranged on the front and back ends of the lower end face of the support plate (15) respectively, the lower ends of the two limiting telescopic rods (14) are fixedly connected with the upper end face of the workbench (1), the support seat (16) is arranged on the support plate (15), and an arc-shaped groove is arranged on the upper end face of the support seat (16).

3. The butt welding device for reinforcing steel bars for civil construction according to claim 2, characterized in that: The moving docking assembly (6) comprises a moving base (12) and a moving docking unit (13), two sliding grooves (7) are symmetrically formed on the upper end face of the workbench (1) along the length direction of the workbench (1), the lower end of the moving base (12) is arranged to slide in the corresponding sliding groove (7), the front and back end faces of the moving base (12) are fixedly connected with the screw nut (8) on the corresponding positive and negative toothed screw transmission mechanism (2) through the connecting rod (9) respectively, and the moving docking unit (13) is arranged on the moving base (12) along the width direction of the workbench (1).

4. The butt welding device for reinforcing steel bars for civil construction according to claim 3, characterized in that: The mobile docking unit (13) comprises a lower fixed seat one (17), an upper clamping piece one (18), a positioning bolt (19), a positioning pin (21) and an arc-shaped positioning piece (22), the lower fixed seat one (17) is arranged on the mobile base (12) along the width direction of the workbench (1), the upper end surface of the lower fixed seat one (17) is provided with a semicircular groove one, one end of the upper clamping piece one (18) is hinged to one side of the upper end of the lower fixed seat one (17), the other end of the upper clamping piece one (18) is locked with the other side of the upper end of the lower fixed seat one (17) through a locking piece, the lower end surface of the upper clamping piece one (18) is provided with a semicircular groove two, the radius of the semicircular groove one is the same as that of the semicircular groove two, when the upper clamping piece one (18) is in a locked state with the lower fixed seat one (17), the semicircular groove one and the semicircular groove two form a cylindrical placement space one, a through hole one is vertically arranged in the middle of the upper end surface of the upper clamping piece one (18), a through hole two is horizontally arranged in the middle of the front end surface of the upper clamping piece one (18), the lower end of the positioning bolt (19) vertically penetrates through the through hole one and is fixedly connected with the middle of the upper end surface of the arc-shaped positioning piece (22), a plurality of positioning holes (20) are evenly arranged on the shank of the positioning bolt (19) in the vertical direction, the positioning holes (20) are matched with the through hole two, and the positioning pin (21) penetrates through the through hole two and the corresponding positioning holes (20) on the shank in sequence to position.

5. The butt welding device for reinforcing steel bars for civil construction according to claim 4, characterized in that: The fine adjustment docking assembly (5) comprises an operation table (10) and two fine adjustment docking units (11), the operation table (10) is arranged on the middle of the upper end surface of the workbench (1), and the two fine adjustment docking units (11) are symmetrically arranged on the operation table (10) along the width direction of the workbench (1).

6. The butt welding device for reinforcing steel bars for civil construction according to claim 5, characterized in that: The fine adjustment docking unit (11) comprises a lower fixed seat two (23), an upper clamping piece two (24) and a plurality of adjustment bolts (25), the lower fixed seat two (23) is arranged on the operation table (10) along the width direction of the workbench (1), the upper end surface of the lower fixed seat two (23) is provided with a semicircular groove three, one end of the upper clamping piece two (24) is hinged to one side of the upper end of the lower fixed seat two (23), the other end of the upper clamping piece two (24) is locked with the other side of the upper end of the lower fixed seat two (23) through a locking piece, the lower end surface of the upper clamping piece two (24) is provided with a semicircular groove four, the radius of the semicircular groove three is the same as that of the semicircular groove four, when the upper clamping piece two (24) is in a locked state with the lower fixed seat two (23), the semicircular groove three and the semicircular groove four form a cylindrical placement space two, the cylindrical placement space two is arranged on the same axis as the cylindrical placement space one, and the plurality of adjustment bolts (25) are arranged on the side walls of the lower fixed seat two (23) and the upper clamping piece two (24) along the circumferential direction of the cylindrical placement space two and are threadedly connected with the lower fixed seat two (23) and the upper clamping piece two (24).

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