Gantry type submerged arc welding machine

Abstract

The invention provides a gantry type submerged arc welding machine, and relates to the technical field of gantry welding machines, the gantry type submerged arc welding machine comprises a gantry body, a lifting table is arranged on the gantry body in a lifting mode, a welding turntable is rotatably mounted in the middle of the lifting table, a submerged arc welding head is arranged in a sliding groove in a translation sliding mode, and a wire feeding channel and a discharging channel are formed in the submerged arc welding head; a discharging grooved wheel is installed at the bottom of the storage box in a fixed-axis rotating mode, and the submerged-arc welding head drives a plurality of piston telescopic plates to synchronously move in the same direction or in a separated mode in the translation sliding process, so that the capacity of telescopic grooves is adjusted. The welding process of the arc-shaped welding seam is specifically optimized, the welding operation of the arc-shaped welding seam can be carried out under the state that the portal frame body is not moved through rotation of the welding rotary disc, the blanking speed can be adjusted in a self-adaptive mode according to the welding radius, normal proceeding of submerged-arc welding operation is guaranteed, and in addition, the welding efficiency is improved. And the device can also be used for welding snakelike continuous welding seams, so that the welding difficulty is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gantry welding machines, and specifically relates to a gantry submerged arc welding machine. Background Art

[0002] In the prior art, there is a special gantry welding machine for the rear frame walking type that can automatically clean the weld seam, with the publication number of "CN209632374U", including a gantry and a cleaning mechanism. A main control cabinet is fixed on one side of the gantry, and a controller is arranged at the front end of the main control cabinet. A precision grinding track is inlaid at the lower end of the main control cabinet. Inside the middle part of the gantry, there are welding torch walking pulleys, and a connecting arm is installed at the lower end on the other side of the welding torch walking pulleys. The connecting arm is inlaid with a cleaning mechanism, and welding heads are fixed at both ends of the connecting arm. A vertical scale is arranged at the lower end on the other side of the gantry, and a sliding frame is arranged at one end of the gantry. A lubricating mechanism is fixed at the upper end of the welding torch walking pulleys. This special gantry welding machine for the rear frame walking type that can automatically clean the weld seam is provided with an outer box, which is a fixed device with the two side welding heads, and a dust removal rod adsorbs dust impurities and polluted gases generated during the mechanical operation, avoiding abnormal operation caused by excessive impurities.

[0003] However, there are still relatively obvious defects in the use of the above device: The above gantry welding device is the same as most existing gantry welding mechanisms, and both adopt a translation sliding mechanism in the XY-axis direction. This kind of sliding mechanism can better adapt to straight weld seams, but for circular arc weld seams, the above device needs to simultaneously perform two-way adjustments in the XY directions, and the welding process is relatively complex. Summary of the Invention

[0004] The purpose of the present invention is to provide a gantry submerged arc welding machine to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A gantry submerged arc welding machine includes a gantry body. A lifting table is arranged on the gantry body in a lifting manner. A welding turntable is rotatably installed in a fixed-axis manner through a rotary support in the middle of the lifting table. A sliding groove with an extension line passing through the center of the welding turntable is opened on the welding turntable. A submerged arc welding head is slidably arranged in translation in the sliding groove, and the submerged arc welding head performs translational sliding along the length direction of the sliding groove.

[0007] A wire feeding channel and a material feeding channel are opened in the submerged arc welding head. The wire feeding channel and the material feeding channel communicate at the bottom of the submerged arc welding head. A welding wire is inserted into the wire feeding channel. The material feeding channel is connected to a storage bin fixedly installed on the welding turntable through a flexible telescopic pipeline.

[0008] A blanking chute wheel is rotatably installed at the bottom of the storage bin in a fixed-axis manner. A plurality of telescopic grooves are arranged in an annular array in the blanking chute wheel. A piston telescopic plate is telescopically arranged in each of the plurality of telescopic grooves. The telescopic driving mechanism of the piston telescopic plate is a submerged arc welding head. During the translational sliding process of the submerged arc welding head, a plurality of piston telescopic plates are driven to move towards or away from each other synchronously, so as to adjust the capacity of the telescopic groove.

[0009] During the rotation of the welding turntable, the blanking chute wheel rotates synchronously. The submerged arc welding flux in the storage bin is conveyed into the blanking channel through the rotation of the blanking chute wheel, and flows out from the bottom end of the submerged arc welding head under the action of the self-weight of the submerged arc welding flux.

[0010] Preferably, the gantry body is composed of an upper cross beam and legs fixedly installed at the four corners of its bottom. Rail wheels are fixedly installed on the sides of the legs away from the upper cross beam. The rail wheels cooperate with the guide rails laid on the ground, and the rail wheels slide translationally along the guide rails to drive the gantry body to reciprocate translationally.

[0011] Preferably, lifting holding rails are fixedly installed at the four corners of the lifting platform. The lifting holding rails are installed on the legs at the four corners of the gantry body in a lifting and sliding manner. Hoisting winches are also fixedly installed at the four corners of the upper cross beam. The hoisting winches are connected to the lifting platform through hoisting cables. The reciprocating rotational movement of the hoisting winches drives the lifting platform to perform lifting movement.

[0012] Preferably, a wire feeding frame is also installed at the upper end of the submerged arc welding head. A wire feeding wheel is rotatably installed on the wire feeding frame in a fixed-axis manner. The wire feeding wheel conveys the wound welding wire into the wire feeding channel, and a wire feeding mechanism for pushing the welding wire towards the welding position is also arranged in the wire feeding channel.

[0013] Preferably, a mechanism groove is formed at the bottom of the material storage box. A reset torsion winding disc is rotatably mounted on a fixed shaft in the mechanism groove. A pulling wire rope is wound around the reset torsion winding disc. One end of the pulling wire rope away from the reset torsion winding disc is connected to the submerged arc welding head. During the translational sliding process of the submerged arc welding head, the reset torsion winding disc is driven to perform winding and unwinding rotational motion. A driving gear is coaxially and fixedly mounted on the reset torsion winding disc. The driving gear meshes with a telescopic rack. The rotation of the driving gear drives the telescopic rack to perform reciprocating translational sliding. One side of the telescopic rack close to the blanking groove wheel is connected to a sealing piston through a rotating shaft. The sealing piston is slidably arranged in a piston cylinder. The piston cylinder is coaxially and fixedly connected to the blanking groove wheel. A hollow groove communicating with the piston cylinder is formed in the blanking groove wheel. A connecting column is fixedly mounted in the hollow groove. A number of compression springs equal to that of the telescopic grooves are annularly and arrayedly mounted on the connecting column. One end of the compression spring away from the connecting column is fixedly connected to a piston expansion plate. Oil is filled in both the hollow groove and the piston cylinder. The translational sliding of the submerged arc welding head drives the sealing piston to reciprocate, thereby pushing a number of piston expansion plates to expand and contract, and further adjusting the capacity of the telescopic groove.

[0014] Preferably, a one-way ratchet mechanism is fixedly mounted on one side of the blanking groove wheel away from the piston cylinder through a connecting rod. The driving wheel of the one-way ratchet mechanism is also fixedly connected to a driving gear through a connecting rod. The driving gear meshes with a blanking gear ring fixedly mounted on the lifting platform. The rotation of the driving gear drives the blanking groove wheel to perform a clockwise rotational motion, thereby performing passive blanking operation.

[0015] Preferably, a blanking motor is also fixedly mounted on one side of the material storage box. The blanking motor meshes with the driven wheel of the one-way ratchet mechanism through a blanking gear. The rotation of the blanking motor drives the blanking groove wheel to perform a counterclockwise rotational motion, thereby performing active blanking operation.

[0016] Preferably, a welding driving motor is also fixedly mounted at the bottom of the lifting platform. The welding driving motor meshes with a welding gear ring fixedly mounted at the bottom of the welding turntable through a welding gear. The rotation of the welding driving motor drives the welding turntable to perform a fixed-axis rotational motion.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The present invention can better adapt to straight welds and circular arc welds, and specifically optimizes the welding process of circular arc welds. Through the rotation of the welding turntable, the circular arc weld can be welded without moving the gantry body, and the blanking rate can be adjusted adaptively according to the welding radius to ensure the normal progress of the submerged arc welding operation. In addition, the device can also weld serpentine continuous welds, greatly reducing the welding difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the connection structure between the material storage box and the submerged arc welding head of the present invention;

[0021] Figure 3 For the appendix of the specification Figure 2 The enlarged schematic diagram of area A in the figure;

[0022] Figure 4 It is a schematic diagram of the telescopic state of the piston telescopic plate of the present invention;

[0023] Figure 5 It is a schematic diagram of the internal sectional structure of the submerged arc welding head of the present invention.

[0024] In the figure: 1 gantry body, 2 lifting platform, 3 welding turntable, 4 sliding groove, 5 submerged arc welding head, 6 wire feeding channel, 7 blanking channel, 8 welding wire, 9 material storage box, 10 blanking grooved wheel, 11 telescopic groove, 12 piston telescopic plate, 13 upper cross beam, 14 leg, 15 track wheel, 16 guide rail, 17 lifting holding rail, 18 hoisting winch, 19 hoisting cable, 20 wire feeding frame, 21 wire feeding wheel, 22 mechanism groove, 23 reset torsion winding disc, 24 pulling wire rope, 25 driving gear, 26 telescopic rack, 27 sealing piston, 28 piston cylinder, 29 hollow groove, 30 connecting column, 31 extrusion spring, 32 one-way ratchet mechanism, 33 driving gear, 34 blanking gear ring, 35 blanking motor, 36 blanking gear, 37 welding driving motor, 38 welding gear ring. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1-5 , the present invention provides a technical solution:

[0027] Embodiment 1:

[0028] A gantry type submerged arc welding machine includes a gantry body 1, a lifting platform 2 is arranged on the gantry body 1 in a lifting manner, a welding turntable 3 is rotatably installed at the middle part of the lifting platform 2 through a rotary support fixed shaft, a sliding groove 4 with an extension line passing through the center of the welding turntable 3 is opened on the welding turntable 3, and a submerged arc welding head 5 is slidably arranged in the sliding groove 4 in a translational manner, and the submerged arc welding head 5 slides translationally along the length direction of the sliding groove 4;

[0029] A wire feeding channel 6 and a material feeding channel 7 are provided inside the submerged arc welding head 5. The wire feeding channel 6 and the material feeding channel 7 communicate with each other at the bottom of the submerged arc welding head 5. A welding wire 8 is inserted into the wire feeding channel 6. The material feeding channel 7 is communicated with a storage bin 9 fixedly installed on the welding turntable 3 through a flexible telescopic pipeline.

[0030] A blanking chute wheel 10 is rotatably installed on the bottom of the storage bin 9 around a fixed axis. A plurality of telescopic grooves 11 are arranged in an annular array inside the blanking chute wheel 10. A piston telescopic plate 12 is telescopically arranged in each of the plurality of telescopic grooves 11. The telescopic driving mechanism of the piston telescopic plate 12 is the submerged arc welding head 5. During the translational sliding process of the submerged arc welding head 5, the plurality of piston telescopic plates 12 are driven to move towards or away from each other synchronously, so as to adjust the capacity of the telescopic grooves 11.

[0031] During the rotation of the welding turntable 3, the blanking chute wheel 10 rotates synchronously, and the submerged arc welding flux in the storage bin 9 is conveyed into the material feeding channel 7 through the rotation of the blanking chute wheel 10, and flows out from the bottom end of the submerged arc welding head 5 under the action of the self-weight of the submerged arc welding flux.

[0032] In this embodiment, the gantry 1 serves as the overall bearing mechanism of the device. The gantry 1 is composed of an upper cross beam 13 and legs 14 fixedly installed at the four corners of its bottom. Track wheels 15 are fixedly installed on the sides of the legs 14 away from the upper cross beam 13. The track wheels 15 cooperate with the guide rails 16 laid on the ground. The track wheels 15 slide translationally along the guide rails 16 to drive the gantry 1 to reciprocate translationally. The gantry 1 performs translational sliding through the traveling motor installed on the track wheels 15. A lifting table 2 is arranged on the gantry 1 in a lifting manner. A welding turntable 3 is rotatably installed in the middle of the lifting table 2 through a rotary bearing fixed shaft. A submerged arc welding head 5 is arranged on the welding turntable 3 to slide translationally. By adjusting the position of the submerged arc welding head 5, the welding radius of the arc-shaped weld groove is adjusted, and the arc-shaped weld groove is welded by the rotation of the welding turntable 3. This device can also weld linear weld grooves, and the welding process is similar to the scheme in the prior art, which will not be elaborated here. A wire feeding channel 6 and a feeding channel 7 are provided in the submerged arc welding head 5. The wire feeding channel 6 and the feeding channel 7 communicate at the bottom of the submerged arc welding head 5. A welding wire 8 is inserted into the wire feeding channel 6. The feeding channel 7 is connected to a storage bin 9 fixedly installed on the welding turntable 3 through a flexible telescopic pipeline. This type of welding head structure is also a commonly used welding head structure in the existing submerged arc welding mechanism, which will not be elaborated here. A feeding chute wheel 10 is rotatably installed at the bottom of the storage bin 9. A number of telescopic grooves 11 are arranged in an annular array in the feeding chute wheel 10. Piston expansion plates 12 are telescopically arranged in the number of telescopic grooves 11. By the telescopic translational sliding of the piston expansion plates 12, the capacity of the telescopic grooves 11 is adjusted, and further the feeding amount during the rotation of the feeding chute wheel 10 is adjusted. The driving mechanism of the piston expansion plates 12 is the submerged arc welding head 5. During the translational sliding process of the submerged arc welding head 5, a number of piston expansion plates 12 are driven to move towards or away from each other synchronously, so that the piston expansion plates 12 can automatically adjust adaptively according to the position of the submerged arc welding head 5, ensuring that sufficient welding flux is added to the submerged arc welding head 5 at different radii. And the feeding chute wheel 10 rotates synchronously during the rotation of the welding turntable 3, so as to correspondingly adjust the feeding rate according to the rotation rate of the welding turntable 3, further ensuring the normal feeding of the welding flux.

[0033] Embodiment Two:

[0034] Lifting holding rails 17 are fixedly installed at the four corners of the lifting table 2. The lifting holding rails 17 are installed on the legs 14 at the four corners of the gantry 1 in a lifting and sliding manner. Hoisting winches 18 are also fixedly installed at the four corners of the upper cross beam 13. The hoisting winches 18 are connected to the lifting table 2 through hoisting cables 19. The lifting table 2 is driven to perform lifting motion by the reciprocating rotational motion of the hoisting winches 18.

[0035] In this embodiment, the lifting drive mechanism of the lifting table 2 is further disclosed. The lifting table 2 is driven to perform lifting motion by the reciprocating rotational motion of the hoisting winches 18.

[0036] Embodiment 3:

[0037] A wire feeding frame 20 is further installed at the upper end of the submerged arc welding head 5. A wire feeding wheel 21 is rotatably installed on the wire feeding frame 20 by a fixed shaft. The wire feeding wheel 21 conveys the wound welding wire 8 into the wire feeding channel 6, and a wire feeding mechanism for pushing the welding wire 8 towards the welding position is further arranged in the wire feeding channel 6.

[0038] In this embodiment, a wire feeding frame 20 is installed at the upper end of the submerged arc welding head 5. The wire feeding wheel 21 arranged on the wire feeding frame 20 winds and reels the welding wire 8, and evenly prevents curling during the welding process to ensure the normal progress of the welding process. A wire feeding mechanism for pushing the welding wire 8 towards the welding position is further arranged in the wire feeding channel 6. This kind of welding wire 8 pushing mechanism is a common wire feeding form in the prior art and will not be elaborated here.

[0039] Embodiment 4:

[0040] A mechanism groove 22 is opened at the bottom of the storage box 9. A reset torsion winding disc 23 is rotatably installed in the mechanism groove 22 by a fixed shaft. A pulling wire rope 24 is wound and arranged on the reset torsion winding disc 23. One end of the pulling wire rope 24 away from the reset torsion winding disc 23 is connected to the submerged arc welding head 5. During the translational sliding process of the submerged arc welding head 5, the reset torsion winding disc 23 is driven to perform winding and unwinding rotational motion. A driving gear 25 is coaxially and fixedly installed on the reset torsion winding disc 23. The driving gear 25 meshes with the telescopic rack 26. The rotation of the driving gear 25 drives the telescopic rack 26 to perform reciprocating translational sliding. One side of the telescopic rack 26 close to the blanking chute wheel 10 is connected to a sealing piston 27 through a rotating shaft. The sealing piston 27 is arranged to perform translational sliding in a piston cylinder 28. The piston cylinder 28 is coaxially and fixedly connected to the blanking chute wheel 10. A hollow groove 29 communicating with the piston cylinder 28 is opened in the blanking chute wheel 10. A connecting column 30 is fixedly installed in the hollow groove 29. A number of compression springs 31 equal to that of the telescopic grooves 11 are annularly and arrayedly installed on the connecting column 30. One end of the compression spring 31 away from the connecting column 30 is fixedly connected to the piston expansion plate 12. Oil is filled in both the hollow groove 29 and the piston cylinder 28. The translational sliding of the submerged arc welding head 5 drives the sealing piston 27 to reciprocate, thereby pushing a number of piston expansion plates 12 to perform expansion and contraction motion, and further adjusting the capacity of the telescopic grooves 11.

[0041] In this embodiment, a telescopic driving mechanism of the piston telescopic plate 12 is further disclosed. The submerged arc welding head 5 translates and slides to drive the telescopic movement of the pulling wire rope 24. The pulling wire rope 24 is wound around the reset torsion winding disc 23. A torsion reset spring is arranged on the reset torsion winding disc 23. The torsion reset spring winds and rotates the reset torsion winding disc 23 in a single direction without external force. The pulling wire rope 24 pulls to make the reset torsion winding disc 23 perform a reciprocating rotational movement. The rotation of the reset torsion winding disc 23 drives the rotation of the driving gear 25. The rotation of the driving gear 25 drives the telescopic movement of the telescopic rack 26. The telescopic movement of the telescopic rack 26 drives the telescopic movement of the sealing piston 27. The sealing piston 27 is arranged in the piston cylinder 28 in a translational sliding manner. The telescopic movement of the sealing piston 27 enables the conversion of hydraulic oil in the piston cylinder 28 and the hollow groove 29, thereby adjusting the telescopic movement of the piston telescopic plate 12.

[0042] Embodiment Five:

[0043] A one-way ratchet mechanism 32 is fixedly installed on one side of the blanking sheave 10 away from the piston cylinder 28 through a connecting rod. The driving wheel of the one-way ratchet mechanism 32 is also fixedly connected to a driving gear 33 through a connecting rod. The driving gear 33 meshes with a blanking gear ring 34 fixedly installed on the lifting platform 2. The rotation of the driving gear 33 drives the blanking sheave 10 to perform a clockwise rotational movement, thereby performing passive blanking operation.

[0044] A blanking motor 35 is also fixedly installed on one side of the storage box 9. The blanking motor 35 meshes with the driven wheel of the one-way ratchet mechanism 32 through a blanking gear 36. The rotation of the blanking motor 35 drives the blanking sheave 10 to perform a counterclockwise rotational movement, thereby performing active blanking operation.

[0045] In this embodiment, two blanking methods of the blanking sheave 10 are disclosed. Among them, the passive blanking operation is that the rotation of the welding turntable 3 drives the rotation of the driving gear 33. The rotation of the driving gear 33 drives the blanking sheave 10 to perform a clockwise rotational movement, thereby performing passive blanking. This process does not require the participation of a motor. This blanking method is applicable to the welding process of the arc welding groove. When the welding of a straight weld is required, at this time, the welding turntable 3 needs to be fixed, and submerged arc welding is performed through the translation of the gantry body 1. During this process, the rotation of the blanking motor 35 drives the blanking sheave 10 to perform active blanking operation. Among the passive blanking operation and the active blanking operation, the rotational directions of the blanking sheave 10 are different. Therefore, by connecting the blanking sheave 10 through the one-way ratchet mechanism 32, the interference between the passive blanking operation and the active blanking operation can be prevented, ensuring the normal progress of the blanking process.

[0046] Embodiment Six:

[0047] A welding drive motor 37 is also fixedly installed at the bottom of the lifting table 2. The welding drive motor 37 meshes with a welding gear ring 39 fixedly installed at the bottom of the welding turntable 3 through a welding gear 38. The rotation of the welding drive motor 37 drives the welding turntable 3 to perform a fixed-axis rotation movement.

[0048] In this embodiment, a rotation drive mechanism of the welding turntable 3 is further disclosed. The rotation of the welding drive motor 37 drives the welding turntable 3 to rotate.

[0049] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gantry submerged arc welding machine, comprising a gantry body, characterized in that: A lifting table is arranged in a lifting manner on the gantry body. A welding turntable is rotatably installed on the middle part of the lifting table through a rotary bearing. A sliding groove with an extension line passing through the center of the welding turntable is formed on the welding turntable. A submerged arc welding head is slidably arranged in the sliding groove in a translational manner, and the submerged arc welding head slides translationally along the length direction of the sliding groove. A wire feeding channel and a material feeding channel are formed in the submerged arc welding head. The wire feeding channel and the material feeding channel communicate at the bottom of the submerged arc welding head. A welding wire is inserted into the wire feeding channel. The material feeding channel is communicated with a storage bin fixedly installed on the welding turntable through a flexible telescopic pipeline. A blanking grooved wheel is rotatably installed at the bottom of the storage bin. A plurality of telescopic grooves are arranged in a circular array in the blanking grooved wheel. Piston telescopic plates are telescopically arranged in the plurality of telescopic grooves. The telescopic driving mechanism of the piston telescopic plates is the submerged arc welding head. During the translational sliding process of the submerged arc welding head, the plurality of piston telescopic plates are driven to move towards or away from each other synchronously, so as to adjust the capacity of the telescopic grooves. The blanking grooved wheel rotates synchronously during the rotation of the welding turntable, and the submerged arc welding flux in the storage bin is conveyed into the material feeding channel through the rotation of the blanking grooved wheel, and flows out from the bottom end of the submerged arc welding head under the action of the self-weight of the submerged arc welding flux.

2. The gantry submerged arc welding machine according to claim 1, characterized in that: The gantry body is composed of an upper cross beam and legs fixedly installed at the four corners of its bottom. Track wheels are fixedly installed on one side of each leg away from the upper cross beam. The track wheels cooperate with guide rails laid on the ground, and the track wheels slide translationally along the guide rails to drive the gantry body to reciprocate translationally.

3. The gantry submerged arc welding machine according to claim 2, characterized in that: Lifting holding rails are fixedly installed at the four corners of the lifting table. The lifting holding rails are slidably installed on the legs at the four corners of the gantry body. Hoisting winches are also fixedly installed at the four corners of the upper cross beam. The hoisting winches are connected with the lifting table through hoisting cables, and the lifting table is driven to lift through the reciprocating rotational movement of the hoisting winches.

4. A gantry submerged arc welding machine according to claim 1 or 3, characterized in that: A wire feeding frame is also installed at the upper end of the submerged arc welding head. A wire feeding wheel is rotatably installed on the wire feeding frame. The wire feeding wheel conveys the wound welding wire into the wire feeding channel, and a wire feeding mechanism for pushing the welding wire towards the welding position is also arranged in the wire feeding channel.

5. The gantry submerged arc welding machine according to claim 4, wherein: A mechanism groove is formed at the bottom of the storage bin. A reset torsion winding disc is rotatably mounted on a fixed shaft in the mechanism groove. A pulling wire rope is wound around the reset torsion winding disc. One end of the pulling wire rope away from the reset torsion winding disc is connected to the submerged arc welding head. During the translational sliding process of the submerged arc welding head, the reset torsion winding disc is driven to perform winding and unwinding rotational motion. A driving gear is coaxially and fixedly mounted on the reset torsion winding disc. The driving gear meshes with a telescopic rack. The rotation of the driving gear drives the telescopic rack to perform reciprocating translational sliding. One side of the telescopic rack close to the blanking chute wheel is connected to a sealing piston through a rotating shaft. The sealing piston is translationally slidably arranged in a piston cylinder. The piston cylinder is coaxially and fixedly connected to the blanking chute wheel. A hollow groove communicating with the piston cylinder is formed in the blanking chute wheel. A connecting column is fixedly mounted in the hollow groove. A number of compression springs equal to the number of the telescopic grooves are annularly and arrayedly mounted on the connecting column. One end of the compression spring away from the connecting column is fixedly connected to a piston telescopic plate. Oil is filled in both the hollow groove and the piston cylinder. The translational sliding of the submerged arc welding head drives the sealing piston to reciprocate, thereby pushing a number of piston telescopic plates to perform telescopic motion, and further adjusting the capacity of the telescopic groove.

6. The gantry submerged arc welding machine according to claim 5, characterized in that: A one-way ratchet mechanism is fixedly mounted on one side of the blanking chute wheel away from the piston cylinder through a connecting rod. The driving wheel of the one-way ratchet mechanism is also fixedly connected to a driving gear through a connecting rod. The driving gear meshes with a blanking gear ring fixedly mounted on the lifting platform. The rotation of the driving gear drives the blanking chute wheel to perform a clockwise rotational motion, thereby performing passive blanking operation.

7. A gantry submerged arc welding machine according to claim 6, characterized in that: A blanking motor is also fixedly mounted on one side of the storage bin. The blanking motor meshes with the driven wheel of the one-way ratchet mechanism through a blanking gear. The rotation of the blanking motor drives the blanking chute wheel to perform a counterclockwise rotational motion, thereby performing active blanking operation.

8. The gantry submerged arc welding machine according to claim 7, wherein: A welding driving motor is also fixedly mounted on the bottom of the lifting platform. The welding driving motor meshes with a welding gear ring fixedly mounted on the bottom of the welding turntable through a welding gear. The rotational motion of the welding driving motor drives the welding turntable to perform a fixed-axis rotational motion.

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