CN220144967U

CN220144967U - Constrained arc ultra-narrow gap welding device using spine type flux strip

Info

Publication number: CN220144967U
Application number: CN202321642747.8U
Authority: CN
Inventors: 朱亮; 刘振民; 郭宁; 张爱华; 魏建平; 陈顺清; 马沛杰; 蔺瑞
Original assignee: Lanzhou University of Technology
Current assignee: Lanzhou University of Technology
Priority date: 2023-06-26
Filing date: 2023-06-26
Publication date: 2023-12-08
Anticipated expiration: 2033-06-26

Abstract

The utility model discloses a constraint arc ultra-narrow gap welding device using a spine type welding flux strip, which comprises a welding gun body, welding wires and the spine type welding flux strip, wherein the welding wires and the spine type welding flux strip are arranged on the welding gun body, the spine type welding flux strip comprises a connecting rope and a plurality of welding flux strips which are sequentially connected with the connecting rope in series, the welding flux strips are of an integrated structure, a shallow groove part is formed in the middle of one side wall of the left end and the right end of each welding flux strip along the serial connection direction and is used for enabling the connecting rope to be embedded and then connected, a deep groove part is formed in the middle of the side wall of the other symmetrical end of each welding flux strip along the serial connection direction and is used for enabling the welding wires to extend into the welding wires, and the opening depth of the deep groove part exceeds the width center line of the welding flux strip. The utility model has the advantages of simple and compact structure, convenient and flexible operation, easy manufacture, good feeding effect and good welding effect.

Description

Constrained arc ultra-narrow gap welding device using spine type flux strip

Technical Field

The utility model mainly relates to the technical field of ultra-narrow gap welding, in particular to a constrained arc ultra-narrow gap welding device using a spine type flux strip.

Background

The narrow gap welding is a technological method suitable for welding medium plates, and the method changes a groove from a conventional V type into a deep and narrow I-type groove, so that the cross section area of a welding line is greatly reduced, filling welding materials are saved, the total welding heat input of a joint is reduced, and the welding production cost is reduced while the welding production efficiency is improved. The ultra-narrow gap welding method further reduces the width of the groove, controls the width of the groove to be 4-6 mm, and ensures that the welding efficiency is higher and the cost is lower. However, because the side wall of the groove is parallel to the direction of the welding wire, the electric arc is limited by the volume of the electric arc, the heating area is mainly concentrated at the bottom of the groove, the side wall area of the groove is difficult to heat, and the problems of poor fusion of the side wall and the like are easily formed.

In the operation of the ultra-narrow gap welding device in the prior art, the following technical problems exist:

one is that a part of the prior art flux strip consists of a steel wire mesh and flux coated on two sides of the steel wire mesh, and the welding flux strip is folded into a U shape before welding and then is placed into a groove. The middle part of the steel wire mesh is exposed, when in welding, the arc first contacts with the steel wire mesh to conduct electricity, and if the steel wire mesh attached to the side wall is provided with a part which is not coated by welding flux, the steel wire mesh and the side wall form an electrified channel, so that the arc ascends. And because the welding flux sheet is required to be placed at the bottom of the groove in advance for welding, the operation is inconvenient, the welding efficiency is low, and residues of the welding flux sheet are left after welding, so that the slag removal is difficult.

Secondly, part of flux sheet chains in the prior art are automatically conveyed to the root of the groove through a flux sheet conveying pipe, when welding wires enter the flux sheet, the flux sheet is paved in front of an electric arc, but the relative positions of the welding wires and the flux sheet are not fixed, and the constraint effect of the flux sheet on the electric arc is unstable.

Thirdly, the driving force of the automatic feeding of the welding wire is converted into a power source for conveying the welding flux belt through a transmission device in part of the prior art, and the cooperative feeding of the welding wire and the welding flux belt is realized, but the structure is complex. The welding flux strip of the device is formed by abutting the welding flux small pieces of the two half pieces firstly and then bonding the welding flux small pieces through the springs, so that the preparation process of the welding flux strip is very complicated, the welding flux small pieces of the two independent half pieces are easy to separate, and finally the welding effect is very poor. And the welding flux small pieces of the two half pieces are square, so that the welding flux small pieces are easy to twist and collide with each other to block materials in the conveying and turning process.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the constrained arc ultra-narrow gap welding device which is simple and compact in structure, convenient and flexible to operate, easy to manufacture, good in feeding effect and good in welding effect and uses the spine type flux strip.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides an use super narrow clearance welding set of restraint electric arc of backbone formula solder strip, includes the welding gun body and locates welding wire, backbone formula solder strip on the welding gun body, backbone formula solder strip is including connecting rope and a plurality of solder mask piece of concatenating in proper order on connecting the rope, the solder mask piece is integrated into one piece structure, a shallow slot portion has been seted up along concatenating the direction in the one end lateral wall middle part at both ends about the solder mask piece for make connect the rope embedding back connection, a deep slot portion has been seted up along concatenating the direction in the middle part of the other end lateral wall of solder mask piece symmetry for make the welding wire stretch into the embedment, the depth of seting up of deep slot portion exceeds the width central line of solder mask piece.

As a further improvement of the utility model, the shallow groove part is filled with epoxy resin for fixing the soldering flux sheet on the connecting rope.

As a further improvement of the utility model, the left and right ends of the soldering flux sheet are arc ends so as to facilitate the coil storage, the conveying and the turning of the spine type soldering flux belt.

As a further improvement of the present utility model, the welding gun body includes a support plate and a belt feeding mechanism mounted on the support plate, the belt feeding mechanism including a flux pulley, a belt feeding motor, a belt feeding wheel and a force-applying wheel, the spine flux belt being wound on a circumferential surface of the flux pulley and then dropping downward, the belt feeding motor being provided below the flux pulley and a belt feeding wheel being mounted on a driving shaft, the force-applying wheel being disposed near the belt feeding wheel for forming a passage therebetween to convey the spine flux belt by rotation of the belt feeding wheel.

As a further improvement of the utility model, the device also comprises a gusset and a gusset spring, wherein the gusset is arranged on the supporting plate in a swinging way through a rotating shaft, the gusset is arranged on the gusset through a rotating shaft, the gusset spring is detachably fixed on one side of the gusset through a fixing plate, and the support strength of the gusset by the gusset spring is adjusted through adjusting the fixing position so as to adjust the friction force between the gusset and the spinal flux belt.

As a further improvement of the utility model, the tail end of the belt feeding motor is arranged on the supporting plate through the supporting seat.

As a further improvement of the utility model, the welding gun body further comprises a conductive plate assembly, the conductive plate assembly comprises a conductive plate, a welding flux belt guide rail, a conductive nozzle and an insulating block, the upper ends of the conductive plate and the welding flux belt guide rail are fixed on a supporting plate through the insulating block, the conductive nozzle is arranged at the lower end part of the conductive plate, the side part of the conductive nozzle is communicated with the welding flux belt guide rail and is used for guiding welding flux pieces into the conductive nozzle one by one, the conductive plate is provided with a vertical wire feeding groove, and the wire feeding groove is communicated with the conductive nozzle and is used for guiding welding wires into the conductive nozzle and is embedded in a deep groove part of the welding flux pieces.

As a further improvement of the utility model, the conducting nozzle is vertically provided with a through groove for being communicated with the wire feeding groove, and the top starting end of the through groove is also provided with a round hole part for reinforcing the conductive contact between the welding wire and the conducting nozzle.

As a further improvement of the utility model, the wire feeding groove is formed by connecting a through groove part and more than two sections of groove parts, and the more than two sections of groove parts are respectively arranged on the front surface and the back surface of the conductive plate.

As a further improvement of the utility model, the welding gun body further comprises a wire feeding mechanism, the wire feeding mechanism comprises a wire feeding bent pipe and two wire feeding wheels, the wire feeding bent pipe is fixed at the upper end of the conducting plate through a fixing piece and is communicated with the wire feeding groove, and the two wire feeding wheels are clamped and fixed at the head end of the wire feeding bent pipe and are used for forming a channel between the two wire feeding wheels to feed welding wires into the wire feeding bent pipe.

Compared with the prior art, the utility model has the advantages that:

the welding device is completely different from the prior art in structural form and pressing mode, and the welding flux pieces are integrally formed and are integral, and the structural form enables a plurality of welding flux pieces which are sequentially connected on the connecting rope in series to form a structural form similar to human body spines. The single pressed manufacture of the soldering flux sheet or the integral manufacture of the spine soldering flux belt is simpler and firmer.

Secondly, the ultra-narrow gap welding device of the constrained arc using the spine type flux strip has the special structural form of the spine type flux strip, so that the welding wire can extend into and be embedded in the flux sheet, the relative stability of the welding wire and the flux sheet is greatly improved, and the welding arc is better constrained. And more importantly, the whole flux sheet has a certain thickness, and the thickness is completely different from a thin half flux sheet in the prior art, so that the restraint effect on an electric arc is further greatly improved, and the welding effect is further excellent.

The third is the constraint arc ultra-narrow gap welding device using the spine type flux strip, and the left end and the right end of the flux sheet are arc ends. The special scientific design firstly makes two adjacent welding flux sheets not easy to squeeze, and is convenient for the whole coil containing of the spine welding flux strip, and the specific coil containing mode is described below. Secondly, because spine type welding flux strip need take place the diversion and just combine with the welding wire and weld in the collaborative feeding in-process, so the design of this kind of circular arc end is convenient for send the diversion in-process in coordination, and adjacent two soldering flux pieces can not warp conflict each other, can not take place the risk of putty.

The constrained arc ultra-narrow gap welding device using the spine type welding flux belt further comprises the reinforcing plate and the reinforcing spring, so that the friction force of the reinforcing wheel, the feeding wheel and the spine type welding flux belt is further increased, the conveying effect is better, the conveying is more stable, and the follow-up cooperative feeding type ultra-narrow gap welding operation of the welding wire welding flux belt is further ensured.

Fifthly, the utility model discloses a restricted arc ultra-narrow gap welding device using a spine type flux strip, which is characterized in that a conductive nozzle can shrink inwards after being acted by the restoring force of a conductive plate through investigation and research in operation, and a round hole part is formed at the top initial end of a through groove, so that a welding wire and the conductive nozzle can be in further effective contact during shrinkage, and the stability of a conductive process is further ensured. The grooves of more than two sections are respectively arranged on the front surface and the back surface of the conductive plate, namely on the front surface and the back surface, so that the integrity and the stability of the conductive plate can be further ensured on the premise of meeting the smooth feeding of the welding wire 2.

Drawings

Fig. 1 is a schematic perspective view of a confined arc ultra-narrow gap welding apparatus of the present utility model.

Fig. 2 is a schematic diagram of the principle of the front view structure of the constrained arc ultra-narrow gap welding device of the present utility model.

Fig. 3 is a schematic perspective view of the solder sheet of the present utility model.

Fig. 4 is a schematic top view of the solder sheet of the present utility model.

Fig. 5 is a schematic diagram of the perspective structural principle of the conductive plate of the present utility model.

Fig. 6 is a schematic view of the principle of the three-dimensional structure of the contact tip of the present utility model.

The reference numerals in the drawings denote:

1. a welding gun body; 11. a support plate; 12. a belt feed mechanism; 121. flux belt wheel; 122. a tape feed motor; 123. a feeding roller; 124. a stress application wheel; 125. a gusset; 126. a stress spring; 127. a rotating shaft; 128. a fixing plate; 129. a support base; 13. a conductive plate assembly; 131. a conductive plate; 1311. a wire feeding groove; 132. a flux strip guide rail; 133. a contact tip; 1331. a through groove; 1332. a circular hole portion; 134. an insulating block; 14. a wire feeding mechanism; 141. wire feeding bent pipe; 142. wire feeding wheel; 143. a fixing member; 2. a welding wire; 3. a spine flux strip; 31. a connecting rope; 32. flux pieces; 321. shallow groove parts; 322. deep groove.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the specific examples.

As shown in fig. 1 to 6, the utility model provides a constrained arc ultra-narrow gap welding device using a spine type welding flux strip, which comprises a welding gun body 1, a welding wire 2 arranged on the welding gun body 1 and the spine type welding flux strip 3, wherein the spine type welding flux strip 3 comprises a connecting rope 31 and a plurality of welding flux pieces 32 which are sequentially connected with the connecting rope 31 in series, the welding flux pieces 32 are of an integrated structure, a shallow groove 321 is formed in the middle of one end side wall of each of the left and right ends of the welding flux pieces 32 along the serial direction for enabling the connecting rope 31 to be embedded and then connected, a deep groove 322 is formed in the middle of the other end side wall of the welding flux piece 32 along the serial direction for enabling the welding wire 2 to extend into the welding wire, and the opening depth of the deep groove 322 exceeds the width center line of the welding flux pieces 32. As shown by the dashed line a in fig. 3, a width centerline of the solder sheet 32 is illustrated.

The specific implementation principle is as follows: in fig. 1, F is a piece to be welded, and the welding flux sheet 32 of the present utility model is an integrally formed structure with the structure and pressing mode adjusted, and the shallow groove 321 at the right end of the welding flux sheet can meet the embedded connection of the connecting rope 31, and in this embodiment, the connecting rope 31 is a glass fiber rope, so that the manufacturing and using effects are excellent. This embodiment makes a plurality of flux plates 32 connected in series to the connecting string 31 form a structure like a human vertebra. The individual production of the solder tabs 32 and the integral production of the spinal solder strip 3 are both simpler and stronger.

Meanwhile, the left end of the flux sheet 32 is provided with a deeper deep groove 322, so that the welding wire 2 can be inserted into the inner groove, the relative stability of the welding wire 2 and the flux sheet 32 is improved, and the welding arc is better restrained. And more importantly, since the grooves for placing the glass fiber ropes and the welding wires 2 are to be excavated, the structure is required to have a certain thickness of the whole flux sheet 32 (otherwise, the shallow groove 321 and the deep groove 322 cannot be excavated), and the thickness is completely different from the thin half flux sheet in the prior art, so that the constraint effect on the electric arc is further greatly improved, and the welding effect is further excellent.

Through the special scientific design, the method has the following technical advantages:

firstly, the welding device for the ultra-narrow gap of the constraint arc using the spine type welding flux belt is characterized in that the welding flux sheet 32 is completely different from the structure form and the pressing mode in the prior art, and the welding flux sheet 3 is of an integrated structure, and the structure form is that a plurality of welding flux sheets 32 which are sequentially connected on the connecting rope 31 in series form the structure form like the spine of a human body. The individual press-forming of the solder tabs 32 or the integral forming of the spinal solder strip 3 is simpler and stronger.

Secondly, the ultra-narrow gap welding device of the constrained arc using the spine type flux strip, which is disclosed by the utility model, has the special structural form of the spine type flux strip 3, so that the welding wire 2 can extend into and be embedded in the flux sheet 32, the relative stability of the welding wire 2 and the flux sheet 32 is greatly improved, and the welding arc is better constrained. Furthermore, and more importantly, the overall flux sheet 32 of the present utility model has a thickness that is quite different from the thin half-sheet flux tabs of the prior art, and further greatly enhances the arc-holding effect, further providing excellent welding.

As shown in fig. 1 to 4, further, in the preferred embodiment, the shallow groove 321 is filled with epoxy resin for fixing the solder sheet 32 to the connection cord 31. By filling the epoxy resin, the overall firmness and ductility of the spine type welding flux strip 3 are improved, and the spine type welding flux strip is more suitable for collaborative feeding type ultra-narrow gap welding of the welding wire flux strip.

As shown in fig. 1 to 4, further, in the preferred embodiment, both the left and right ends of the flux sheet 32 are rounded ends to facilitate the coil storage and transport redirection of the spinal flux strip 3. As shown in fig. 3 and 4B, both the left and right ends of the flux sheet 32 are arc ends. The flux sheet 3 is formed integrally, so that arc ends can be formed at the left and right ends conveniently. The special scientific design has the following technical advantages: firstly, the adjacent two flux sheets 32 are not easy to squeeze, so that the whole coil of the spine flux strip 3 is convenient to store, and the specific coil storing mode is described below. Secondly, because spine type welding flux strip 3 need take place the diversion in the cooperation feeding process and just can combine with welding wire 2 to weld, so the design of this kind of circular arc end is convenient for advance the diversion in-process in coordination, and adjacent two soldering flux pieces 32 can not warp conflict each other, can not take place the risk of putty.

As shown in fig. 1 to 2, further, in the preferred embodiment, the welding gun body 1 includes a support plate 11 and a belt feeding mechanism 12 mounted on the support plate 11, the belt feeding mechanism 12 includes a flux pulley 121, a belt feeding motor 122, a belt feeding pulley 123 and a force applying wheel 124, the spine type flux belt 3 is wound on the circumferential surface of the flux pulley 121 and then falls downward, the belt feeding motor 122 is provided below the flux pulley 121, and the belt feeding pulley 123 is mounted on the drive shaft, and the force applying wheel 124 is provided near the belt feeding pulley 123 for forming a passage therebetween to convey the spine type flux belt 3 by rotation of the belt feeding pulley 123. When the tape feed motor 122 drives the feed roller 123 to rotate, the sandwiched spinal solder tape 3 is driven to be conveyed downward by friction force. The design form ensures that the spine type welding flux belt 3 is folded and compact, and the whole structure of the welding device is simple and compact, thereby being more suitable for the cooperative feeding type ultra-narrow gap welding of the welding wire welding flux belt.

As shown in fig. 1 to 2, further, in the preferred embodiment, a gusset 125 and a gusset spring 126 are provided, wherein the gusset 125 is swingably mounted on the support plate 11 through a rotation shaft 127, the gusset 124 is mounted on the gusset 125 through a rotation shaft, the gusset spring 126 is detachably fixed to one side of the gusset 125 through a fixing plate 128, and the support strength of the gusset 125 by the gusset spring 126 is adjusted by adjusting the fixing position to adjust the friction force between the gusset 124 and the spinal flux strip 3. In this embodiment, the fixing plate 128 is detachably fixed on the frame through the screw member, and the fixing position of the fixing plate 128 is adjusted, for example, closer to the gusset 125, so that the gusset 125 is further pressed by the gusset spring 126, and further the gusset wheel 124 on the gusset 125 is closer to the feeding wheel 123, that is, the friction force of the gusset wheel 124, the feeding wheel 123 and the spinal flux strip 3 is further increased, so that the conveying effect is better, the conveying is more stable, and further the following cooperative feeding type ultra-narrow gap welding operation of the welding wire flux strip is ensured.

Further, as shown in fig. 1, in the preferred embodiment, the tail end of the charging motor 122 is mounted to the support plate 11 via a support 129. So that the tape feed motor 122 is easily disassembled and maintained.

As shown in fig. 1, 5 and 6, further, in the preferred embodiment, the welding gun body 1 further comprises a conductive plate assembly 13, the conductive plate assembly 13 comprises a conductive plate 131, a solder strip guide 132, a conductive nozzle 133 and an insulating block 134, the conductive plate 131 and the upper end of the solder strip guide 132 are fixed on the supporting plate 11 through the insulating block 134, the conductive nozzle 133 is mounted on the lower end of the conductive plate 131, the side of the conductive nozzle 133 is communicated with the solder strip guide 132 for guiding the solder strips 32 to the conductive nozzle 133 one by one, a vertical wire feeding groove 1311 is formed on the conductive plate 131, and the wire feeding groove 1311 is communicated with the conductive nozzle 133 for guiding the welding wire 2 into the conductive nozzle 133 and embedded in a deep groove portion 322 of the solder strip 32. When the welding wire 2 is fed into the contact tip 133 through the wire feeding groove 1311, the belt feeding mechanism 12 simultaneously feeds the spine type flux strip 3 into the contact tip 133 through the guiding action of the flux strip guide rail 132, and at this time, the flux sheet 32 of the spine type flux strip 3 is slightly turned, so that the welding wire 2 is embedded into the deep groove portion 322 of the flux sheet 32, and further, the subsequent cooperative feeding type ultra-narrow gap welding operation is completed.

As shown in fig. 1, 5 and 6, in a preferred embodiment, a through slot 1331 is vertically formed on the contact tip 133 for communicating with the wire feeding slot 1311, and a circular hole 1332 is formed at the top start end of the through slot 1331 for enhancing the conductive contact between the welding wire 2 and the contact tip 133. In operation, it was found through investigation that the contact tip 133 is contracted inward after receiving the restoring force of the conductive plate 131, and by providing a circular hole portion 1332 at the top start end of the through groove 1331, the welding wire 2 and the contact tip 133 can be further effectively contacted during contraction, thereby further securing the stability of the conductive process.

As shown in fig. 1, 5 and 6, in a preferred embodiment, the wire feeding slot 1311 is formed by connecting a slot portion and two or more grooves, and the two or more grooves are respectively formed on the front and back surfaces of the conductive plate 131. The through groove part is a hollowed groove, and the groove part is only concave but not hollowed. As shown in fig. 5, C is a through groove portion, and D is a groove portion. The grooves of more than two sections are respectively arranged on the front surface and the back surface of the conductive plate 131, namely on the front surface and the back surface, so that the integrity and the stability of the conductive plate 131 can be further ensured on the premise of meeting the requirement that the welding wire 2 is smoothly fed.

As shown in fig. 1 and 2, further, in the preferred embodiment, the welding gun body 1 further includes a wire feeding mechanism 14, the wire feeding mechanism 14 includes a wire feeding bent tube 141 and two wire feeding wheels 142, the wire feeding bent tube 141 is fixed to the upper end of the conductive plate 131 by a fixing member 143 and is communicated with the wire feeding slot 1311, and the two wire feeding wheels 142 are fixed to the head end of the wire feeding bent tube 141 in a manner of being clamped therebetween and are used for forming a channel between the two wire feeding wheels 142 to feed the welding wire 2 into the wire feeding bent tube 141. In this embodiment, the wire feeding wheel 142 is also connected to a driving motor, and the welding wire 2 is smoothly fed into the wire feeding bent pipe 141 by driving the wire feeding wheel 142.

While the utility model has been described in terms of preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the utility model. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A constrained arc ultra-narrow gap welding apparatus using a spinal flux strip, characterized by: including welding gun body (1) and locate welding wire (2), spine type welding flux area (3) on welding gun body (1), spine type welding flux area (3) are including connecting rope (31) and a plurality of soldering flux piece (32) of concatenating in proper order on connecting rope (31), soldering flux piece (32) are integrated into one piece structure, a shallow slot portion (321) has been seted up along concatenating the direction in the one end lateral wall middle part at both ends about soldering flux piece (32) for connect after connecting rope (31) embedding, a deep slot portion (322) has been seted up along concatenating the direction in the middle part of the other end lateral wall of soldering flux piece (32) symmetry for make welding wire (2) stretch into the embedment, the width central line of the depth of seting up of deep slot portion (322) exceeded soldering flux piece (32).

2. The constrained arc ultra-narrow gap welding apparatus using a spinal flux strip as claimed in claim 1, wherein: the shallow groove (321) is filled with epoxy resin for fixing the soldering flux sheet (32) on the connecting rope (31).

3. The constrained arc ultra-narrow gap welding apparatus using a spinal flux strip as claimed in claim 1, wherein: the left end and the right end of the flux sheet (32) are arc ends so as to facilitate the coiling, storage, conveying and turning of the spine flux strip (3).

4. The constrained arc ultra-narrow gap welding apparatus using a spinal flux strip as claimed in claim 1, wherein: the welding gun body (1) comprises a supporting plate (11) and a belt feeding mechanism (12) arranged on the supporting plate (11), the belt feeding mechanism (12) comprises a welding flux belt wheel (121), a belt feeding wheel (122), a belt feeding wheel (123) and a force application wheel (124), the spine welding flux belt (3) is coiled on the circumferential surface of the welding flux belt wheel (121) and then falls downwards, the belt feeding motor (122) is arranged below the welding flux belt wheel (121) and is provided with the belt feeding wheel (123) on a driving shaft, and the force application wheel (124) is arranged close to the belt feeding wheel (123) and is used for forming a channel between the belt feeding wheel and the belt feeding wheel to convey the spine welding flux belt (3) through rotation of the belt feeding wheel (123).

5. The constrained arc ultra-narrow gap welding apparatus using a spinal flux strip as claimed in claim 4, wherein: the novel soldering flux belt comprises a supporting plate (11), and is characterized by further comprising a gusset plate (125) and a gusset spring (126), wherein the gusset plate (125) is arranged on the supporting plate (11) in a swinging mode through a rotating shaft (127), the gusset wheel (124) is arranged on the gusset plate (125) through the rotating shaft, the gusset spring (126) is detachably fixed on one side of the gusset plate (125) through a fixing plate (128), and the supporting strength of the gusset plate (125) to the gusset plate (126) is adjusted through adjusting the fixing position, so that the friction force between the gusset wheel (124) and the spine flux belt (3) is adjusted.

6. The constrained arc ultra-narrow gap welding apparatus using a spinal flux strip as claimed in claim 4, wherein: the tail end of the power feeding device (122) is arranged on the supporting plate (11) through the supporting seat (129).

7. The constrained arc ultra-narrow gap welding apparatus using a spinal flux strip as claimed in claim 4, wherein: the welding gun body (1) further comprises a conducting plate assembly (13), the conducting plate assembly (13) comprises a conducting plate (131), a welding flux belt guide rail (132), a conducting nozzle (133) and an insulating block (134), the conducting plate (131) and the upper end of the welding flux belt guide rail (132) are fixed on a supporting plate (11) through the insulating block (134), the conducting nozzle (133) is installed at the lower end part of the conducting plate (131), the side part of the conducting nozzle (133) is communicated with the welding flux belt guide rail (132) so as to be used for guiding welding flux sheets (32) into the conducting nozzle (133) one by one, a vertical wire feeding groove (1311) is formed in the conducting plate (131), and the wire feeding groove (1311) is communicated with the conducting nozzle (133) so as to be used for guiding welding wires (2) into the conducting nozzle (133) and embedding the welding flux sheets (32) into a deep groove part (322) of the welding flux sheets (32).

8. The constrained arc ultra-narrow gap welding apparatus using a spinal flux strip as claimed in claim 7, wherein: a through groove (1331) is vertically formed in the conducting nozzle (133) and is communicated with the wire feeding groove (1311), and a round hole portion (1332) is further formed in the top starting end of the through groove (1331) and is used for reinforcing conducting contact between the welding wire (2) and the conducting nozzle (133).

9. The constrained arc ultra-narrow gap welding apparatus using a spinal flux strip as claimed in claim 7, wherein: the wire feeding groove (1311) is formed by connecting a through groove part and more than two sections of groove parts, and the more than two sections of groove parts are respectively arranged on the front surface and the back surface of the conductive plate (131).

10. The constrained arc ultra-narrow gap welding apparatus using a spinal flux strip as claimed in claim 7, wherein: the welding gun body (1) further comprises a wire feeding mechanism (14), the wire feeding mechanism (14) comprises a wire feeding bent pipe (141) and two wire feeding wheels (142), the wire feeding bent pipe (141) is fixed at the upper end of the conducting plate (131) through a fixing piece (143) and is communicated with the wire feeding groove (1311), and the two wire feeding wheels (142) are clamped at the head end of the wire feeding bent pipe (141) and are used for forming a channel between the two wire feeding wheels (142) so as to feed welding wires (2) into the wire feeding bent pipe (141).