Rebar connection device and method of use thereof

Abstract

The application provides a reinforcing steel bar connecting device and a use method thereof. Symmetrical clamping claws are arranged on the end of a supporting arm. The clamping claws are driven by one or two cylinders to clamp the two reinforcing steel bars. Two symmetrical electromagnetic coils are arranged between the two clamping claws. The two symmetrical electromagnetic coils are synchronously connected with the clamping claws on the two sides of the clamping claws. The two symmetrical electromagnetic coils are combined into a ring-shaped heating coil structure. A connecting cylinder is further arranged. The connecting cylinder comprises at least two ring-shaped groove plates in a sector structure. The two ring-shaped groove plates are sleeved on the two reinforcing steel bar end heads. The two reinforcing steel bars are pressed in the connecting cylinder by the clamping claws. The electromagnetic coils heat the connecting cylinder and the two reinforcing steel bars to be fused. The connecting method is mainly used for the connection of reinforcing steel bars in a reinforced concrete structure and can provide high strength and durability. The main advantages are high connection strength and good rigidity.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel bar butt joint, in particular to a steel bar connecting device and a method thereof. BACKGROUND

[0002] In the construction, in addition to the conventional welding, sleeve connection is also used to connect two steel bars. In GB / T163-2013 sleeve for mechanical connection of steel bars, several commonly used sleeves are listed, such as straight thread sleeve and tapered thread sleeve. However, these threaded sleeves have certain defects when applied to the case where the spacing of steel bars is inconsistent. For example, in the connection of steel cages, the steel bars of the steel cage often have inconsistent lengths, which causes the steel bars to be not in alignment, and the above-mentioned standard sleeves are generally only suitable for connecting in the case where two steel bars are in alignment, and cannot be applied to this case. If the standard sleeve is used, the joint will be deformed, the steel bar end will not be screwed in enough, and the requirements of the first-class steel bar joint cannot be met.

[0003] Rolling straight thread connection is also used, and the basic principle is to process threads on the ends of two steel bars to be connected by using a threading machine (or a thread rolling machine), and then use a sleeve with internal threads to tightly align the two ends of the steel bars. However, for large-sized steel bars, the processing of threads is difficult, and it is also difficult to achieve firm connection by using the conventional direct connection method of ribbed steel bars.

[0004] The steel bars are connected by welding, which requires high temperature and electric energy during the welding process, and the operation is complex and dangerous. Moreover, deformation and residual stress may occur after welding, which causes the structure to lose balance. At the same time, the steel bar welding connection requires strict control of the welding process and technology, otherwise it may affect the seismic performance and service life of the component.

[0005] A kind of adjustable sleeve for steel cage (patent publication number: CN211850377U), it includes the standard sleeve for being connected with the steel bar end of one steel cage steel bar, the lengthened sleeve for being connected with the steel bar end of another steel cage steel bar and the lengthened thread connection for connecting the standard sleeve and the lengthened sleeve;The adjustable sleeve for steel cage can be installed on the construction site, the construction efficiency is high, and the construction quality can be guaranteed, but the adjustable sleeve for steel cage still needs to process threads on the ends of the steel bars to be connected, so there is still great inconvenience in the connection operation on the construction site. SUMMARY

[0006] The main purpose of the present application is to provide a steel bar connecting device and a method thereof, which solves the problem that the adjustable sleeve still needs to process threads on the ends of the steel bars to be connected, thus there is still great inconvenience in the connection operation on the construction site.

[0007] To solve the above technical problems, the technical scheme adopted by the present application is: a reinforcing steel bar connecting device, a pair of clamping jaws are symmetrically arranged on the end of the supporting arm, the pair of clamping jaws are driven by one or two air cylinders to clamp the reinforcing steel bars, two symmetrical electromagnetic coils are arranged between the two clamping jaws, the two symmetrical electromagnetic coils are synchronously connected with the clamping jaws on the two sides respectively, and the two symmetrical electromagnetic coils are combined into a ring-shaped heating coil structure.

[0008] A connecting cylinder is further arranged, the connecting cylinder comprises at least two annular groove plates of a fan-shaped structure, the two annular groove plates are sleeved on the two reinforcing steel bar end portions, the two reinforcing steel bars are pressed in the connecting cylinder by the pair of clamping jaws, and the electromagnetic coils heat the connecting cylinder to be fused with the two reinforcing steel bars.

[0009] In the preferred embodiment, the end of the supporting arm is connected with a mounting plate, the two air cylinders are arranged at the two ends of the mounting plate respectively, and the pair of clamping jaws are arranged on the air cylinders.

[0010] High-voltage boxes are further arranged on the two sides of the mounting plate, and the high-voltage boxes are electrically connected with the electromagnetic coils.

[0011] In the preferred embodiment, the structure of the pair of clamping jaws is as follows: L-shaped driving arms are symmetrically arranged on the two sides of the end of the air cylinder, the driving arms are rotationally connected with the air cylinder at the bending positions, the short edges of the driving arms are connected with the end portions of the telescopic rods of the air cylinder, the long edges of the driving arms are connected with arc-shaped clamping claws, and the inner side surfaces of the arc-shaped clamping claws are in an arc-shaped structure.

[0012] The inner side surfaces of the arc-shaped clamping claws are further provided with magnets.

[0013] In the preferred embodiment, the electromagnetic coils are arranged in a back-and-forth winding mode, and the electromagnetic coils are in an arc-shaped structure as a whole, the arc-shaped surface is matched with the outer surface of the connecting cylinder, the two electromagnetic coils are arranged around the outside of the connecting cylinder to form an electromagnetic heating ring, the two ends of the electromagnetic coils are connected with synchronous rods respectively, and the two ends of the synchronous rods are connected with the driving arms of the pair of clamping jaws.

[0014] In the preferred embodiment, the inner surfaces of the two ends of the connecting cylinder are matched with the surfaces of the reinforcing steel bars, and the middle part of the connecting cylinder is provided with a raised fusion chamber, the two ends of the fusion chamber are matched with the surfaces of the reinforcing steel bars respectively to form a closed chamber, and the inner chamber of the fusion chamber is provided with at least two sintered filler blocks.

[0015] In the preferred embodiment, the cross section of the sintered filler block is in a fan-shaped structure, and the vertical section is in an H-shaped structure, the two ends of the upper and lower reinforcing steel bars are arranged at the two ends of the sintered filler block respectively, and the two ends of the upper and lower reinforcing steel bars are not in contact.

[0016] The material of the sintered filler block is a mixture of iron, aluminum and magnesium powders, or a mixture of copper, aluminum and magnesium powders, or a mixture of iron, zinc and aluminum powders.

[0017] The electromagnetic coils are arranged outside the fusion chamber, the electromagnetic coils heat the sintered filler block to be fused, the sintered filler block fuses the two ends of the upper and lower reinforcing steel bars together, and the sintered filler block is also fused with the fusion chamber of the connecting cylinder as a whole.

[0018] In the preferred embodiment, the connecting cylinder is composed of two annular groove plates, which are arranged symmetrically along the axis center by 180°, and a recessed positioning groove is arranged on one side of the upper end of the annular groove plate, and a positioning block matched with the positioning groove is arranged on the other side.

[0019] A raised sealing baffle is arranged on one side of the melting chamber of the annular groove plate along the middle of the edge line, and a sealing groove matched with the sealing baffle is arranged on the other side, and the melting chamber composed of the two annular groove plates forms a closed chamber through the cooperation of the sealing baffle and the sealing groove.

[0020] In the preferred embodiment, at least two ring grooves are further arranged on the two ends of the connecting cylinder, the two bosses on the annular groove plate form a first ring groove, and the bosses below the first ring groove on the side of the melting chamber form a second ring groove.

[0021] The arc-shaped clamping claws of the clamping jaws are arranged on the first ring groove to splice the two annular groove plates to form the connecting cylinder.

[0022] Locking hoops are arranged on the two ends of the connecting cylinder and the second ring groove, and the locking hoops are provided with openings, the connecting ears on both sides of the opening are in the shape of a horn opening, and the two connecting ears are connected through bolts.

[0023] In the preferred embodiment, the tail of the supporting arm is sleeved with the telescopic rod, and the fixing nut on the supporting arm is arranged to abut against the end surface of the telescopic rod.

[0024] A vertical handle is further arranged on the end of the telescopic rod, and a vertical supporting handle is further arranged on the lower surface of the supporting arm.

[0025] The method comprises:

[0026] S1, the cylinders drive the clamping jaws to open, the separate annular groove plates are arranged on the two clamping jaws, the arc-shaped clamping claws of the clamping jaws are attracted to the first ring groove of the annular groove plate through magnetic attraction, and the melting chamber of the annular groove plate is filled with sintered filler blocks;

[0027] S2, the upper-positioned steel bars are hoisted, when the upper-positioned steel bars are close to the top end of the lower-positioned steel bars, the clamping jaws and the annular groove plates are close to the two steel bar ends, the two steel bar ends are clamped at the melting chamber position, and the two cylinders are simultaneously driven to make the two annular groove plates extrude the upper and lower steel bars to the coaxial position, and the two annular groove plates form the connecting cylinder through the positioning structure.

[0028] S3, the high-voltage box is started, the high-voltage box drives the electromagnetic coil, the electromagnetic coil is wound around the melting chamber position, the melting chamber starts to heat, the sintered filler blocks in the melting chamber start to sinter, the sintered filler blocks are sintered through high temperature, and the sintered filler blocks form an integral whole with the upper and lower steel bars and the melting chamber.

[0029] S4, after the welding bin is cooled, locking hoops are respectively installed at both ends of the connecting cylinder and the second ring groove position, and the locking hoops are fixed through bolts;

[0030] S5, the clamping jaw is opened, and the electromagnetic coil is also opened, and the upper and lower steel bars are butt-jointed.

[0031] The application provides a steel bar connecting device and a use method thereof, two steel bars are first positioned and butt-jointed by using a connecting cylinder, a sintered filler block in the connecting cylinder is melted and sintered through external electromagnetic coil induction heating, and the sintered filler block melts and sinter the connecting cylinder and the two steel bars together, the connecting mode is mainly used for connecting the steel bars in a reinforced concrete structure, and can provide higher strength and durability. The main advantages are high connecting strength, good rigidity, improved stability and carrying capacity of the whole component, higher connecting strength, and anti-deformation and anti-twisting capacity. BRIEF DESCRIPTION OF DRAWINGS

[0032] The application will be further described below in combination with the drawings and examples:

[0033] Figure 1 is a main structure diagram of the butt-joint device of the application;

[0034] Figure 2 is a structure diagram of the butt-joint device of the application before butt-jointing steel bars;

[0035] Figure 3 is a structure diagram of the butt-joint device of the application during butt-jointing steel bars;

[0036] Figure 4 is a structure diagram of the butt-joint device of the application after butt-jointing steel bars;

[0037] Figure 5 is a disassembled structure diagram of the connecting cylinder of the application;

[0038] Figure 6 is a surface structure diagram of the connecting cylinder of the application;

[0039] Figure 7 is a locking hoop installation position structure diagram of the application;

[0040] Figure 8 is a synchronous electromagnetic coil installation structure diagram of the application;

[0041] Figure 9 is a clamping jaw installation structure diagram of the application.

[0042] In the diagram: 1. Gripper; 101. Arc-shaped gripper; 102. Drive arm; 2. Electromagnetic coil; 201. Connector; 201. Synchronizing rod; 3. Support arm; 301. Support handle; 302. Fixing nut; 303. Telescopic rod; 304. Handle; 4. Cylinder; 5. Rebar; 6. Connecting cylinder; 601. Positioning groove; 602. Positioning block; 603. First annular groove; 604. Second annular groove; 605. Welding chamber; 606. Sealing flange; 607. Sealing groove body; 7. Mounting plate; 8. High-pressure box; 9. Sintered filler block; 10. Locking clamp; 1001. Connecting ear; 11. Synchronizing rod. Detailed Implementation

[0043] Example 1

[0044] like Figures 1-9 As shown, a rebar connection device includes symmetrically arranged clamping jaws 1 at the ends of a support arm 3. The clamping jaws 1 are driven by one or two cylinders 4 to clamp together. Two symmetrical electromagnetic coils 2 are positioned between the two clamping jaws 1, and are synchronously connected to the jaws on both sides of the clamping jaws 1. The two symmetrical electromagnetic coils 2 are combined to form an annular heating coil structure. A connecting cylinder 6 is also provided, comprising at least two fan-shaped annular grooves. The two annular grooves are fitted onto the ends of two rebars 5, and the clamping jaws 1 press the two rebars 5 tightly inside the connecting cylinder 6. The electromagnetic coils 2 heat the connecting cylinder 6 and fuse it with the two rebars 5. The connecting cylinder 6 and the clamping jaws 1 are used to first position and align the two rebars. The sintered filler block 9 inside the connecting cylinder 6 is induction heated and melted by the external electromagnetic coils 2, fusing the connecting cylinder 6 and the two rebars together.

[0045] The sintered filler block 9 is made of metal powder sintering material. The metal powder is pressed into a block structure. The block structure of the filler block is expanded and sintered by induction heating through electromagnetic coil 2. The sintered filler block 9 fuses the connecting cylinder 6 and two steel bars together. The heating temperature is 800 to 1600°C.

[0046] In the preferred embodiment, the end of the support arm 3 is connected to the mounting plate 7, two cylinders 4 are respectively set at both ends of the mounting plate 7, and the gripper 1 is set on the cylinder 4; the two cylinders 4 drive the two grippers 1 respectively, and a single cylinder 4 drives a single gripper 1.

[0047] High-voltage boxes 8 are also provided on both sides of the mounting plate 7. The high-voltage boxes 8 are electrically connected to the electromagnetic coil 2. The high-voltage boxes 8 are mainly used to drive the electromagnetic coil 2, which heats the connecting cylinder 6 and the sintered filler block 9.

[0048] In the preferred embodiment, the structure of the clamping jaw 1 is as follows: L-shaped driving arms 102 are symmetrically arranged at both sides of the end of the air cylinder 4, the bending position of the driving arm 102 is rotationally connected with the air cylinder 4, the short side of the bending of the driving arm 102 is connected with the end of the telescopic rod of the air cylinder 4, the long side of the bending of the driving arm 102 is connected with the arc-shaped clamping claw 101, and the inner side of the arc-shaped clamping claw 101 is arc-shaped. Figure 9 As shown in the structure, the telescopic cabinet of the air cylinder 4 is retracted, and the two arc-shaped clamping claws 101 clamp the cable.

[0049] The inner side of the arc-shaped clamping claw 101 is also provided with a magnet. The magnet is used to attract the connecting cylinder 6, and has the technical effect of temporarily determining the position of the connecting cylinder 6.

[0050] In the preferred embodiment, the electromagnetic coils 2 are arranged in a back-and-forth winding manner, and the electromagnetic coils 2 are arc-shaped as a whole, the arc-shaped surface is matched with the outer surface of the connecting cylinder 6, the two electromagnetic coils 2 form an electromagnetic heating ring around the connecting cylinder 6, the two ends of the electromagnetic coils 2 are respectively connected with the synchronous rods 11, and the two ends of the synchronous rods 11 are connected with the driving arms 102 of the clamping jaws 1. The electromagnetic coils 2 are arranged in a back-and-forth winding manner to form an electromagnetic heating field, so that the connecting cylinder 6 and the sintered filler block 9 are subjected to electromagnetic induction heating.

[0051] In the preferred embodiment, the inner surfaces of the two ends of the connecting cylinder 6 are attached to the surface of the steel bar 5, and the middle part of the connecting cylinder 6 is provided with a protruding fusion chamber 605, the upper and lower ends of the fusion chamber 605 are respectively attached to the surface of the steel bar 5 to form a sealed chamber, and the inner chamber of the fusion chamber 605 is provided with at least two sintered filler blocks 9. The fusion chamber 605 forms a sealed environment, and when the sintered filler blocks 9 are melted and sintered, there is no leakage of molten metal. The upper and lower ends of the fusion chamber 605 are made of temperature-resistant rubber material, which has better sealing effect.

[0052] In the preferred embodiment, the cross section of the sintered filler block 9 is fan-shaped, and the vertical section is H-shaped. The two ends of the upper and lower steel bars are respectively arranged at the two ends of the sintered filler block 9, and the two ends of the upper and lower steel bars do not contact. Figure 5 As shown in the structure, the two ends of the sintered filler block 9 are connected to the two ends of the upper and lower steel bars, and the sintered filler block 9 fuses the two ends of the two steel bars, so that the connection effect is more stable.

[0053] The material of the sintered filler block 9 is a mixture of iron, aluminum and magnesium powder, or a mixture of copper, aluminum and magnesium powder, or a mixture of iron, zinc and aluminum powder.

[0054] In the preferred embodiment, the copper, aluminum and magnesium mixed powder is punched into a solid shape in the punch die. When the electromagnetic coil 2 heats the sintered filler block 9, the low-melting-point aluminum and magnesium powder begins to melt, the aluminum and magnesium powder begins to adhere to the steel bar and the outer wall of the fusion chamber 605, and the aluminum and magnesium mixed metal liquid blocks the gaps around the fusion chamber 605. Part of the copper powder in the aluminum and magnesium mixed metal liquid has not been melted, and the un-melted copper powder also blocks the gaps around the fusion chamber 605.

[0055] The melting point of the copper powder is 1357℃. When the electromagnetic coil 2 heats the connecting cylinder 6 to 1400℃, the sintered filler block 9 inside the welding chamber 605 melts completely, and the melted sintered filler block 9 fills the entire welding chamber 605. After the electromagnetic coil 2 is powered off, the welding chamber 605 starts to cool down, and the sintered filler block 9 welds the two ends of the steel bar and the welding chamber 605 of the connecting cylinder 6 together. The connection effect is better than the welding effect.

[0056] The electromagnetic coil 2 is arranged outside the welding chamber 605, and the electromagnetic coil 2 heats the sintered filler block 9 to melt the two ends of the upper and lower steel bars together, and the sintered filler block 9 is also welded with the welding chamber 605 of the connecting cylinder 6.

[0057] In the preferred embodiment, the connecting cylinder 6 is composed of two annular groove plates, which are arranged symmetrically along the axis center by 180°. The upper end of the annular groove plate is provided with a recessed positioning groove 601 on one side, and a positioning block 602 matched with the positioning groove 601 on the other side. The positioning block 602 is matched with the positioning groove 601 to effectively position the two annular groove plates.

[0058] The welding chamber 605 of the annular groove plate is provided with a protruding sealing baffle 606 on one side along the middle of the edge line, and a sealing groove body 607 matched with the sealing baffle 606 on the other side. The welding chamber 605 composed of the two annular groove plates forms a closed chamber body through the cooperation of the sealing baffle 606 and the sealing groove body 607.

[0059] In the preferred embodiment, the connecting cylinder 6 is further provided with at least two ring grooves at the two ends. The two protrusions on the annular groove plate form a first ring groove 603, and the protrusions below the first ring groove 603 on the side of the welding chamber 605 form a second ring groove 604.

[0060] The arc-shaped clamping claw 101 of the clamp jaw 1 is arranged on the first ring groove 603 to splice the two annular groove plates to form the connecting cylinder 6. The clamp jaw 1 is arranged on the first ring groove 603, and the clamp jaw 1 is effectively limited.

[0061] The connecting cylinder 6 is provided with a locking hoop 10 at the two ends and the second ring groove 604. The locking hoop 10 is provided with an opening, and the connecting ears 1001 on both sides of the opening are in the shape of a trumpet. The two connecting ears 1001 are connected by bolts. After the welding process is completed, the locking hoop 10 is used to lock the connecting cylinder 6.

[0062] In the preferred embodiment, the tail of the supporting arm 3 is sleeved with the telescopic rod 303, and the fixed nut 302 on the supporting arm 3 is arranged to abut against the end surface of the telescopic rod 303. The supporting arm 3 can be elongated to perform welding construction on steel bars at different positions.

[0063] The telescopic rod 303 is also equipped with a vertical handle 304 at its end, and the lower surface of the support arm 3 is also equipped with a vertical support grip 301. A switch button is provided on the handle 304 for easy control of the air rod 4 for clamping operations.

[0064] Example 2

[0065] Further explanation in conjunction with Example 1, such as Figures 1-9 The structure shown includes the following method: a cylinder 4 drives the jaws 1 to open, separate annular groove plates are installed on the two jaws 1, the arc-shaped grippers 101 of the jaws 1 are magnetically attracted to the first annular groove 603 of the annular groove plate, and the welding chamber 605 of the annular groove plate is filled with sintered filler blocks 9.

[0066] When the upper reinforcing bar is hoisted, and the upper reinforcing bar is close to the top of the lower reinforcing bar, the clamping claw 1 and the annular groove plate are brought close to the ends of the two reinforcing bars. The ends of the two reinforcing bars are stuck in the welding chamber 605. The two cylinders 4 are driven at the same time to make the two annular groove plates squeeze the upper and lower reinforcing bars to the coaxial position. The two annular groove plates form the overall structure of the connecting cylinder 6 through the positioning structure.

[0067] Start the high voltage box 8, which drives the electromagnetic coil 2. The electromagnetic coil 2 is wound around the welding chamber 605, and the welding chamber 605 begins to heat up. The sintering filler block 9 inside the welding chamber 605 begins to sinter. After high-temperature sintering, the sintering filler block 9, the upper and lower steel bars, and the welding chamber 605 form a whole.

[0068] When the distance between the upper and lower ends of the steel bars is too short, a scraper can be used to scrape off the bottom of the upper and lower inner holes of the sintered filler block 9 so that the sintered filler block 9 can be placed between the upper and lower ends of the steel bars.

[0069] When the distance between the upper and lower ends of the reinforcing bars is too long, some sintered powder can be filled into the bottom of the upper and lower inner holes of the sintered filler block 9 on site. The sintered filler block 9 can be fused together with the upper and lower ends of the reinforcing bars.

[0070] This scheme preferably uses copper-aluminum-magnesium mixed powder. The copper-aluminum-magnesium mixed powder is stamped into a solid shape in a stamping die. When the electromagnetic coil 2 heats and sinters the filler block 9, the low melting point aluminum-magnesium powder begins to melt. The aluminum-magnesium powder begins to adhere to the steel bar and the outer wall of the welding chamber 605. The aluminum-magnesium mixed metal liquid blocks the gaps around the welding chamber 605. There is still some copper powder in the aluminum-magnesium mixed metal liquid that has not melted. The unmelted copper powder will also block the gaps around the welding chamber 605 along with the aluminum-magnesium mixed metal liquid.

[0071] The melting point of the copper powder is 1357℃. When the electromagnetic coil 2 heats the connecting cylinder 6 to 1400℃, the sintered filler block 9 in the welding chamber 605 melts completely, and the melted sintered filler block 9 fills the welding chamber 605. When the electromagnetic coil 2 is powered off, the welding chamber 605 starts to cool, and the sintered filler block 9 welds the two ends of the steel bars and the welding chamber 605 of the connecting cylinder 6 into one body. The connecting effect is better than the welding effect.

[0072] After the welding chamber 605 cools down, the locking hoops 10 are installed at the two ends of the connecting cylinder 6 and the position of the second ring groove 604, and the locking hoops 10 are fixed by bolts.

[0073] The clamping jaw 1 is opened, and the electromagnetic coil 2 is also opened. The two steel bars are butted.

[0074] The above embodiments are only preferred technical solutions of the present application, and should not be regarded as a limitation of the present application. The protection scope of the present application should be the technical solutions recited in the claims, including equivalent replacement solutions of the technical features recited in the claims. That is, equivalent replacement improvements within this range are also within the protection scope of the present application.

Claims

1. A reinforcing bar coupling device characterised by: Supporting arm (3) end up and down symmetry is equipped with a pair of clamping jaw (1), a pair of clamping jaw (1) is driven by one or two air cylinder (4) a pair of clamping jaw (1) is equipped with two symmetrical electromagnetic coil (2), two symmetrical electromagnetic coil (2) is respectively connected with the two sides of a pair of clamping jaw (1) jaw synchronous, two symmetrical electromagnetic coil (2) is combined into annular heating coil structure; It is also provided with a connecting cylinder (6), the connecting cylinder (6) includes at least two fan-shaped annular groove plates, two annular groove plates are sleeved on the end of two steel bars (5), and two steel bars (5) are pressed in the connecting cylinder (6) by a pair of clamping jaw (1), the electromagnetic coil (2) heats the connecting cylinder (6) and the upper and lower two steel bars (5) are fused together; The inner surface of the two ends of the connecting cylinder (6) is attached to the surface of the steel bar (5), and the middle part of the connecting cylinder (6) is provided with a raised fusion chamber (605), the upper and lower ends of the fusion chamber (605) are attached to the surface of the steel bar (5) respectively to form a sealed chamber, and the inner chamber of the fusion chamber (605) is provided with at least two sintered filler blocks (9). The cross section of the sintered filler block (9) is fan-shaped structure, and the vertical section is H-shaped structure, the upper and lower ends of the steel bar are arranged at the two ends of the sintered filler block (9), and the upper and lower ends of the steel bar are not in contact. The material of the sintered filler block (9) is iron, aluminum and magnesium mixed powder, or copper, aluminum and magnesium mixed powder, or iron, zinc and aluminum mixed powder. The electromagnetic coil (2) is arranged outside the fusion chamber (605), the electromagnetic coil (2) heats the sintered filler block (9), the sintered filler block (9) fuses the upper and lower ends of the steel bar together, and the sintered filler block (9) is also fused with the fusion chamber (605) of the connecting cylinder (6) as a whole.

2. A reinforcing bar coupling device as claimed in claim 1, wherein: The end of the supporting arm (3) is connected with the mounting plate (7), and the two air cylinders (4) are arranged at the two ends of the mounting plate (7), and the clamping jaw (1) is arranged on the air cylinder (4). The mounting plate (7) is also provided with a high-voltage box (8) on both sides, and the high-voltage box (8) is electrically connected with the electromagnetic coil (2).

3. A reinforcing bar coupling device as claimed in claim 2, wherein: The structure of the clamping jaw (1) is that the end of the air cylinder (4) is symmetrically provided with an L-shaped driving arm (102), the bending position of the driving arm (102) is rotatably connected with the air cylinder (4), the short side of the driving arm (102) is connected with the end of the telescopic rod of the air cylinder (4), the long side of the driving arm (102) is connected with an arc-shaped clamping claw (101), and the inner side of the arc-shaped clamping claw (101) is arc-shaped. The inner side of the arc-shaped clamping claw (101) is also provided with a magnet.

4. The reinforcing bar coupling device defined in claim 1, characterised by: The electromagnetic coil (2) is arranged back and forth, and the whole electromagnetic coil (2) is arc-shaped, the arc surface is matched with the outer surface of the connecting cylinder (6), two electromagnetic coils (2) are arranged outside the connecting cylinder (6) to form an electromagnetic heating ring, the two ends of the electromagnetic coil (2) are connected with a synchronous rod (11), and the two ends of the synchronous rod (11) are connected with the driving arm (102) of the clamping jaw (1).

5. The reinforcing bar coupling device defined in claim 1, characterised in that: The connecting cylinder (6) is composed of two annular groove plates, which are arranged symmetrically along the axis center by rotating 180°. The upper end of the annular groove plate is provided with a recessed positioning groove (601) on one side and a positioning block (602) matched with the positioning groove (601) on the other side. The positioning block (602) is matched with the positioning groove (601); The annular groove plate is provided with a protruding sealing baffle (606) on one side along the middle of the edge line, and a sealing groove body (607) matched with the sealing baffle (606) on the other side. The sealing baffle (606) and the sealing groove body (607) cooperate to form a closed storage body.

6. A reinforcing bar coupling device as claimed in claim 5 wherein: The connecting cylinder (6) is further provided with at least two annular grooves at both ends. The two protrusions on the annular groove plate form a first annular groove (603), and the protrusions below the first annular groove (603) on the side of the fusion chamber (605) form a second annular groove (604); The arc-shaped clamping claws (101) of the clamping jaws (1) are arranged on the first annular groove (603) to splice the two annular groove plates to form the connecting cylinder (6); Locking hoops (10) are arranged on both ends of the connecting cylinder (6) and the second annular groove (604). The locking hoop (10) is provided with an opening. The connecting ears (1001) on both sides of the opening are in a trumpet shape. The two connecting ears (1001) are connected by bolts.

7. The reinforcing bar coupling device defined in claim 1, characterised by: The support arm (3) is sleeved with the telescopic rod (303) at the tail. The fixed nut (302) on the support arm (3) is arranged to abut against the end face of the telescopic rod (303). The telescopic rod (303) is further provided with a vertical handle (304) at the end. The lower surface of the support arm (3) is also provided with a vertical support handle (301).

8. The method of using a reinforcing bar coupling device according to any one of claims 1 to 7, wherein: The method comprises: S1, the cylinders (4) drive the clamping jaws (1) to open. The separate annular groove plates are installed on the two clamping jaws (1). The arc-shaped clamping claws (101) of the clamping jaws (1) are attracted to the first annular groove (603) of the annular groove plate by magnetic force. The fusion chamber (605) of the annular groove plate is filled with sintered filler blocks (9); S2, hoist the upper position steel bars. When the upper position steel bars are close to the top end of the lower position steel bars, the clamping jaws (1) and the annular groove plates are close to the two steel bar ends. The two steel bar ends are clamped at the fusion chamber (605) position. The two cylinders (4) are simultaneously driven to make the two annular groove plates extrude the upper and lower steel bars to the same coaxial position. The two annular groove plates form the connecting cylinder (6) through the positioning structure. S3, start the high-voltage box (8). The high-voltage box (8) drives the electromagnetic coil (2). The electromagnetic coil (2) is wound around the fusion chamber (605) position. The fusion chamber (605) starts to heat up. The sintered filler blocks (9) in the fusion chamber (605) start to sinter. After high-temperature sintering, the sintered filler blocks (9) form an integral whole with the upper and lower steel bars and the fusion chamber (605). S4, after the fusion chamber (605) is cooled, the locking hoops (10) are installed at both ends of the connecting cylinder (6) and the second annular groove (604) position. The locking hoops (10) are fixed by bolts. S5, the opening of the clamp jaw (1), while the electromagnetic coil (2) is also opened, the upper and lower steel butt joint is completed.

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