Butt welding method of storage battery

Abstract

The invention belongs to the technical field of storage battery tools, particularly relates to a butt welding method of a storage battery, and provides the following scheme aiming at the problem that poor welding is easily generated in C-position welding due to a traditional welding method and sequence: placing a perforated battery box at a feeding position of through-wall welding equipment; then the cast-welded battery units are embedded into corresponding hole sites in the battery box; wall-penetrating welding equipment is adjusted, and the assembled large battery die holder which is not welded is fixed in the corresponding positioning clamping groove of the rotating disc and slowly rotates to the welding position; and then the through-wall welding equipment is started. According to the invention, at the beginning of spot welding, two close battery units at the same end of the battery box are firstly welded, and then other points are welded, so that the influence of welding tension generated in the length direction on a third butt welding point can be effectively prevented, that is, unloading butt welding is formed, and the counterforce of a metal pole piece and the butt welding points is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of battery tooling, and in particular to a battery butt welding method. Background Art

[0002] The lead-acid battery manufacturing industry has been developing for many years, and production automation has been rapidly upgraded. Traditional manual operations have been basically replaced. The casting welding, through-wall welding, and heat sealing process routes of large factories are mature and highly controllable. However, the defect rate of through-wall welding of large batteries is extremely high; the battery through-wall welding machine is used for welding batteries, mainly to efficiently and accurately weld the battery electrodes to other metal parts (such as battery connectors, battery poles, etc.). Since the welding process requirements for batteries are relatively high, it is necessary to pay attention to multiple aspects during the operation to ensure the welding quality and avoid damaging the battery or causing safety problems.

[0003] After searching, it is found that conventional manufacturers use two stations for small batteries, first welding 1, 3, 5 welding points and then welding 2, 4 welding points. For large batteries, three stations are used, first welding 1, 2 welding points, then welding 5, 4 welding points, and finally welding 3 welding points, which is conventionally called C-position welding; there is an abnormal phenomenon in the lead-acid battery market called "broken C-position", that is, welding point 3 generates tensile force during welding and finally leads to poor welding. Summary of the invention

[0004] Aiming at the technical problem that the conventional welding method and sequence lead to poor welding in C-position welding, the present invention adopts the following technical solution: A battery butt welding method comprises the following steps: S1: placing the battery box with holes punched in the loading position of the through-wall welding equipment, and then embedding the cast-welded battery cells into the corresponding holes inside the battery box; S2: Adjust the through-wall welding equipment and fix the assembled large battery mold base that has not been welded in the corresponding positioning slot of the turntable, and slowly rotate it to the welding position; S3: Then start the through-wall welding equipment and perform spot welding in the order of No. 3 welding point, No. 4 welding point, No. 5 welding point, No. 2 welding point and No. 1 welding point; finally, perform the normal inspection method for quality inspection.

[0005] A through-wall welding device comprises a fixed platform, the fixed platform comprises a base, the base is an overall U-shaped structure, and a vertical back upright plate is fixed to the end of the upper surface of the base away from the opening, a top support plate extending horizontally toward the middle of the opening of the base is fixed to the top of the back upright plate, two mutually symmetrical tapered roller bearings are embedded in the middle of the top support plate, and the same transmission tube is rotatably connected between the two tapered roller bearings, a turntable is fixed to the top of the transmission tube, a plurality of positioning slots symmetrically distributed in the center of the turntable are opened near the circumferential edge, and the internal dimensions of the positioning slots are adapted to the outer dimensions of the battery box; the upper surface of the top support plate is located at A CNC moving platform is arranged above the back plate, and a vertical double rail with a notch facing the turntable is arranged on the top of the CNC moving platform; an L-shaped fixed arm beam is slidably connected to the side of the vertical double rail, and a rotating hole is opened at the end of the horizontal beam of the L-shaped fixed arm beam, and a slewing mechanism is arranged in the slewing hole, and the slewing mechanism includes an anti-slip bearing clamped in the slewing hole, and a vertical anti-rotation rod is rotatably connected in the anti-slip bearing; a through-wall butt welding machine is fixed to the bottom end of the anti-rotation rod; an embedding groove is opened on the surface of the vertical plate of the L-shaped fixed arm beam, and an electrically controlled positioning pin is fixed to the bottom of the groove, and a roller frame is fixed to the end of the output shaft of the electrically controlled positioning pin, and a tightening roller is clamped at the bottom of the roller frame.

[0006] Preferably, the rotating mechanism also includes a pull rope wound around the anti-rotation rod near the top end; and two symmetrical through-baffles are fixed to the circumferential outer wall of the anti-rotation rod, and the plane on the same side of the two through-baffles is the through-plane, that is, the through-plane passes through the axial line of the anti-rotation rod, and two limit baffles with a plate surface angle of ninety degrees are fixed to the upper surface of the L-shaped fixed arm beam near the anti-rotation rod; and pressure sensors are embedded on the planes of the two limit baffles; and reset springs are fixed to both ends of the pull rope.

[0007] Preferably, an L-shaped bearing holder is fixed to one end of the upper surface of the L-shaped fixed arm beam away from the anti-slip bearing, and the top of the L-shaped bearing holder is rotatably connected to a short shaft rod, and the upper and lower ends of the short shaft rod are respectively fixed with an anti-slip wheel and a worm gear 1; a rotary pull belt is wrapped around the outer wall of the anti-slip wheel, and the two ends of the rotary pull belt are respectively fixed to the ends of two reset springs; a servo motor is fixed to the side of the L-shaped fixed arm beam near the top, and a worm gear meshing with the worm gear 1 is fixed to the top of the output shaft of the servo motor; when it is necessary to control the through-wall butt welding machine to rotate ninety degrees, it is only necessary to start the servo motor, and with the setting of the reset spring, it can be pulled a certain distance more, so that the reset spring always generates a pre-tightening tension on the pull rope, ensuring that the through-wall butt welding machine always remains stable.

[0008] Preferably, a counterweight extension rod extending in the opposite direction is fixed to the top end of the L-shaped fixed arm beam away from the anti-rotation rod, a strip hole is opened at the end of the counterweight extension rod away from the L-shaped fixed arm beam, and a counterweight block is slidably connected in the strip hole; the friction resistance of the vertical double rails can be reduced to ensure that the weight on both sides remains balanced.

[0009] Preferably, roller grooves are provided on the inner walls on both sides in the length direction of the positioning slot, and side rollers are embedded in the roller grooves; lifting trapezoidal slats are fixed to the sides of the top support plate; and the highest point of the lifting trapezoidal slats is lower than the plane where the lower surface of the turntable is located; after welding, when the large battery module is rotated to the lifting trapezoidal slats, it can be slowly lifted up, and at this time, the edges of the large battery module can be conveniently grabbed.

[0010] Preferably, a bearing slot is opened in the middle of the top support plate; the bearing slot is used to clamp two mutually symmetrical tapered roller bearings.

[0011] Preferably, the lower surface of the base is reserved with an upwardly concave arcuate surface. Through such an arrangement, the contact surface between the base and the ground can be triangular, thereby improving the stability of the device.

[0012] Preferably, a horizontally arranged reduction motor is fixed to the lower surface of the top support plate, a worm sleeve is fixed to the top end of the output shaft of the reduction motor, and the outer wall of the transmission tube is sleeved with a driven worm gear that meshes with the worm sleeve; the accuracy of the stopping angle of the driven worm gear and the reverse self-locking effect can be improved.

[0013] Preferably, the circumferential outer wall of the transmission tube is provided with a plurality of side sections symmetrically distributed near the bottom end, and electrical contact pieces connected in series to the alarm circuit are embedded on both sides of the side sections, a contact plate is fixed to the upper surface of the base near the transmission tube, a telescopic support rod is fixed to the top of the contact plate, a metal plate is fixed to the end of the extension rod of the telescopic support rod, and the position of the side section corresponds to the position of the positioning slot.

[0014] The beneficial effects of the present invention are: 1. By setting up a turntable and a through-wall butt welding machine with a rotating mechanism, when spot welding begins, the two battery cells close to each other at the same end of the battery box can be welded first, and then welding of other points can be carried out. This can effectively prevent the influence of the welding tension generated in the length direction on the No. 3 butt welding point, that is, forming a force-relieving butt welding, reducing the resistance between the metal electrode and the butt welding point.

[0015] 2. Through the set pull rope and two through-hole baffles, when you need to control the through-wall welding machine to rotate 90 degrees for welding, you only need to pull one of the reset springs until the through-hole baffle touches the other pressure sensor.

[0016] 3. By means of the two electrical contact pieces arranged on the side section and the metal plate at the end of the telescopic rod, when in use, the two electrical contact pieces can be touched at the same time only when the side section is rotated to be parallel to the metal plate. At this time, the alarm circuit can be triggered and the reduction motor can be controlled to stop rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a through-wall welding device proposed by the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of a through-wall welding device proposed by the present invention when viewed from the bottom on the other side; Figure 3 This is a schematic diagram of the overall structure of a fixed machine platform in a through-wall welding device proposed by the present invention; Figure 4 A side view of a through-wall welding device proposed by the present invention; Figure 5 A top view of a through-wall welding device proposed by the present invention; Figure 6 A schematic diagram of the three-dimensional structure of a rotary mechanism (8) in a through-wall welding device proposed by the present invention; Figure 7 This is a schematic diagram of the assembly structure of a large battery module in a through-wall welding device proposed by the present invention; Figure 8 This is a schematic diagram of the overall structure of a large battery module in a through-wall welding device proposed by the present invention.

[0018] In the figure: 1, base; 2, driven worm wheel; 3, positioning slot; 4, side roller; 5, turntable; 6, large battery module; 601, battery box; 602, cross-shaped partition; 603, battery unit; 604, metal pole piece; 605, No. 3 butt welding point; 606, No. 4 butt welding point; 607, No. 5 butt welding point; 608, No. 2 butt welding point; 609, No. 1 butt welding point; 7, through-wall butt welding machine; 8, rotary mechanism; 801, servo motor; 802, L-shaped bearing seat; 803, rotary pull belt; 804, anti- The rotating rod; 805, the through-hole baffle; 806, the anti-skid wheel; 807, the worm gear one; 808, the limit baffle; 809, the pull rope; 810, the reset spring; 9, the L-shaped fixed arm beam; 10, the vertical double rails; 11, the CNC moving table; 12, the top support plate; 121, the bearing slot; 13, the reduction motor; 14, the lifting trapezoidal slats; 15, the worm sleeve; 16, the transmission tube; 161, the side section; 17, the contact plate; 18, the counterweight extension rod; 19, the electric control positioning pin; 20, the roller frame; 21, the anti-slip bearing. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-8 , a battery butt welding method, comprising the following steps: S1: placing the battery box 601 with holes punched in the loading position of the through-wall welding equipment, and then embedding the cast-welded battery cells 603 into the corresponding holes inside the battery box 601, that is, first drilling holes at the top metal pole piece 604 of the battery cell 603 corresponding to the cross-shaped partition 602 inside the battery box 601; S2: Adjust the through-wall welding equipment and fix the assembled large battery mold base 6 that has not been welded in the corresponding positioning slot 3 of the turntable 5, and slowly rotate it to the welding position; S3: Then start the through-wall welding equipment, and perform spot welding in the order of No. 3 welding point 605, No. 4 welding point 606, No. 5 welding point 607, No. 2 welding point 608, and No. 1 welding point 609; finally, perform a normal inspection method to perform quality inspection.

[0021] Please refer to Figure 1-8A through-wall welding device comprises a fixed platform, which comprises a base 1. The base 1 is a U-shaped structure as a whole, and a vertical back upright plate is fixed to the end of the upper surface of the base 1 away from the opening, and a top support plate 12 extending horizontally toward the middle of the opening of the base 1 is fixed to the top of the back upright plate, and two mutually symmetrical tapered roller bearings are embedded in the middle of the top support plate 12, and the same vertical transmission tube 16 is rotatably connected between the two tapered roller bearings, and a turntable 5 is fixed to the top of the transmission tube 16, and a plurality of positioning slots 3 symmetrically distributed in the center are opened near the circumferential edge of the turntable 5, and the internal dimensions of the positioning slots 3 are adapted to the outer dimensions of the battery box 601; a numerical control moving platform 11 is arranged on the upper surface of the top support plate 12 above the back plate, and the numerical control moving platform 11 can complete the X-axis and Y-axis movement in the horizontal direction according to the instruction, and a vertical double vertical rail 10 with a notch facing the turntable 5 is arranged on the top of the numerical control moving platform 11; the side of the vertical double vertical rail 10 is slidably connected with an L The L-shaped fixed arm beam 9 is provided with a rotating hole at the end of the horizontal beam of the L-shaped fixed arm beam 9, and a rotating mechanism 8 is arranged in the rotating hole, and the rotating mechanism 8 includes an anti-slip bearing 21 clamped in the rotating hole, and a vertical anti-slip rod 804 is rotatably connected in the anti-slip bearing 21; a through-wall butt welding machine 7 is fixed to the bottom end of the anti-slip rod 804; an embedding groove is provided on the surface of the vertical plate of the L-shaped fixed arm beam 9, and an electric control positioning pin 19 extending vertically downward from an extension rod is fixed at the bottom of the embedding groove, and the output shaft of the electric control positioning pin 19 A roller frame 20 is fixed at the end, and a tightening roller is clamped at the bottom of the roller frame 20; through the set turntable 5 and the through-wall butt welding machine 7 with a rotating mechanism 8, when spot welding is started, the two battery cells 603 close to the same end of the battery box 601 can be welded first, and then welding of other points can be carried out, which can effectively prevent the influence of the welding tension generated in the length direction on the No. 3 butt welding point, that is, forming a force-releasing butt welding, reducing the resistance between the metal pole piece 604 and the butt welding point.

[0022] Reference Figure 4 and Figure 6 The slewing mechanism 8 also includes a pull rope 809 wound around the anti-rotation rod 804 near the top position; and the circumferential outer wall of the anti-rotation rod 804 is fixed with two symmetrical through-baffles 805, and the plane on the same side of the two through-baffles 805 is the through-plane, that is, the through-plane passes through the axial line of the anti-rotation rod 804, and the upper surface of the L-shaped fixed arm beam 9 is near the anti-rotation rod 804. Two limit baffles 808 with a plate surface angle of ninety degrees are fixed; and pressure sensors are embedded on the planes of the two limit baffles 808; reset springs 810 are fixed at both ends of the pull rope 809; through the set pull rope 809 and the two through-baffles 805, when it is necessary to control the through-wall welding machine 7 to rotate ninety degrees for welding, only one of the reset springs 810 needs to be pulled until the through-baffle 805 touches the other pressure sensor.

[0023] Reference Figure 6 An L-shaped bearing holder 802 is fixed to the end of the upper surface of the L-shaped fixed arm beam 9 away from the anti-slip bearing 21, and the top of the L-shaped bearing holder 802 is rotatably connected to a short shaft rod, and the upper and lower ends of the short shaft rod are respectively fixed with an anti-skid wheel 806 and a worm wheel 807; a rotary pull belt 803 is wrapped around the outer wall of the anti-skid wheel 806, and the two ends of the rotary pull belt 803 are respectively fixed to the ends of two reset springs 810; a servo motor 801 is fixed to the side of the L-shaped fixed arm beam 9 near the top, and a worm that meshes with the worm wheel 807 is fixed to the top of the output shaft of the servo motor 801; when it is necessary to control the through-wall butt welding machine 7 to rotate ninety degrees, it is only necessary to start the servo motor 801, and with the setting of the reset spring 810, it can be pulled a certain distance more, so that the reset spring 810 always generates a pre-tightening tension on the pull rope 809, ensuring that the through-wall butt welding machine 7 always remains in a stable state.

[0024] Reference Figure 6 A counterweight extension rod 18 extending in the opposite direction is fixed to the top end of the L-shaped fixed arm beam 9 away from the anti-rotation rod 804. A strip hole is opened at the end of the counterweight extension rod 18 away from the L-shaped fixed arm beam 9, and a counterweight block is slidably connected in the strip hole; the friction resistance of the vertical double rails 10 can be reduced to ensure that the weight on both sides remains balanced.

[0025] Reference Figure 1 and Figure 5 , roller grooves are opened on the inner walls on both sides of the length direction of the positioning slot 3, and side rollers 4 are embedded in the roller grooves; a lifting trapezoidal slat 14 is fixed to the side of the top supporting plate 12; and the highest point of the lifting trapezoidal slat 14 is lower than the plane where the lower surface of the turntable 5 is located; after welding, when the large battery module 6 is rotated to the lifting trapezoidal slat 14, it can be slowly lifted up, and at this time, the edge of the large battery module 6 can be conveniently grabbed.

[0026] Reference Figure 3 A bearing slot 121 is provided in the middle of the top support plate 12; the bearing slot 121 is used to clamp two symmetrical tapered roller bearings.

[0027] Reference Figure 2 The lower surface of the base 1 is reserved with an upwardly concave arched surface. Through such an arrangement, the contact surface between the base 1 and the ground can be triangular, thereby improving the stability of the device.

[0028] Reference Figure 1-Figure 2 A horizontally arranged reduction motor 13 is fixed to the lower surface of the top supporting plate 12, and a worm sleeve 15 is fixed to the top end of the output shaft of the reduction motor 13, and the outer wall of the transmission tube 16 is sleeved with a driven worm wheel 2 which meshes with the worm sleeve 15; the accuracy of the stopping angle of the driven worm wheel 2 and the reverse self-locking effect can be improved.

[0029] Reference Figure 2 The outer circumferential wall of the transmission tube 16 is provided with a plurality of side sections 161 which are symmetrically distributed near the bottom end, and both sides of the side sections 161 are embedded with electric contact pieces connected in series to the alarm circuit. A contact plate 17 is fixed to the upper surface of the base 1 near the transmission tube 16, and a telescopic support rod is fixed to the top of the support plate 17, and a metal plate is fixed to the end of the extension rod of the telescopic support rod. The position of the side section 161 corresponds to the position of the positioning slot 3. When in use, the side section 161 can be rotated to be parallel to the metal plate to touch the two electric contact pieces at the same time, and the alarm circuit can be touched at this time, and the reduction motor 13 can be controlled to stop rotating.

[0030] Working principle: First, place the battery box 601 with holes drilled in the loading position of the through-wall welding equipment, and then embed the cast-welded battery unit 603 into the corresponding hole position inside the battery box 601, that is, first drill a hole at the top metal pole piece 604 of the battery unit 603 corresponding to the cross-shaped partition 602 inside it; adjust the through-wall welding equipment and fix the unwelded assembled large battery mold base 6 in the corresponding positioning slot 3 of the turntable 5, and start the reduction motor 13 to drive the turntable 5 to rotate slowly until the battery box 601 rotates to the welding position; then Then start the through-wall welding equipment, weld the welding points one by one, and perform spot welding in the order of No. 3 welding point 605, No. 4 welding point 606, No. 5 welding point 607, No. 2 welding point 608, and No. 1 welding point 609; after the welding is completed, control the extension rod of the electronically controlled positioning pin 19 to extend to lift the through-wall welding machine 7, and then continue to rotate the turntable 5 to weld the next battery box 601. At this time, the welded battery box 601 will rotate to the lifting trapezoidal slat 14, and can be lifted up by it, and then it can be grabbed and lifted away.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for butt welding a battery, comprising the following steps, characterized in that: S1: placing the battery box (601) with holes punched in it at the loading position of the through-wall welding equipment, and then embedding the cast-welded battery units (603) into the corresponding holes inside the battery box (601); S2: Adjust the through-wall welding equipment and fix the assembled large battery mold base (6) that has not been welded in the corresponding positioning slot (3) of the turntable (5), and slowly rotate it to the welding position; S3: Then, the through-wall welding equipment is started, and spot welding is performed in the order of No. 3 butt welding point (605), No. 4 butt welding point (606), No. 5 butt welding point (607), No. 2 butt welding point (608), and No. 1 butt welding point (609); finally, the quality inspection is performed in a normal inspection method.

2. A through-wall welding device according to claim 1, characterized in that: The invention comprises a fixed machine platform, wherein the fixed machine platform comprises a base (1), the base (1) being a U-shaped structure as a whole, and a vertical back upright plate being fixed to an end of the upper surface of the base (1) away from the opening, and a top support plate (12) extending horizontally toward the middle of the opening of the base (1) being fixed to the top of the back upright plate, and two mutually symmetrical tapered roller bearings being embedded in the middle of the top support plate (12), and a same transmission tube (16) being rotatably connected between the two tapered roller bearings, and a turntable (5) being fixed to the top of the transmission tube (16), and a plurality of positioning slots (3) being centrally symmetrically distributed are provided on the turntable (5) near the circumferential edge, and the internal dimensions of the positioning slots (3) are adapted to the external dimensions of the battery box (601); a numerical control moving platform (12) is provided on the upper surface of the top support plate (12) above the back plate 1); and the top of the numerical control moving platform (11) is provided with a vertical double rail (10) with a notch facing the turntable (5); the side of the vertical double rail (10) is slidably connected with an L-shaped fixed arm beam (9), and the horizontal beam end of the L-shaped fixed arm beam (9) is provided with a rotation hole, and a slewing mechanism (8) is provided in the rotation hole, and the slewing mechanism (8) includes an anti-slip bearing (21) clamped in the rotation hole, and a vertical anti-rotation rod (804) is rotatably connected in the anti-slip bearing (21); a through-wall butt welding machine (7) is fixed to the bottom end of the anti-rotation rod (804); the vertical plate surface of the L-shaped fixed arm beam (9) is provided with an embedding groove, and an electric control positioning pin (19) is fixed to the bottom of the embedding groove, and a roller frame (20) is fixed to the output shaft end of the electric control positioning pin (19), and a pressing roller is clamped at the bottom of the roller frame (20).

3. A through-wall welding device according to claim 2, characterized in that: The rotating mechanism (8) also includes a pull rope (809) wound around the anti-rotation rod (804) near the top; and two symmetrical through-baffles (805) are fixed to the circumferential outer wall of the anti-rotation rod (804), and the plane on the same side of the two through-baffles (805) is the through-plane, that is, the through-plane passes through the axis of the anti-rotation rod (804); the upper surface of the L-shaped fixed arm beam (9) is fixed with two limit baffles (808) with a plate surface angle of ninety degrees near the anti-rotation rod (804); and pressure sensors are embedded on the planes of the two limit baffles (808); and reset springs (810) are fixed to both ends of the pull rope (809).

4. A through-wall welding device according to claim 3, characterized in that: An L-shaped bearing holder (802) is fixed to one end of the upper surface of the L-shaped fixed arm beam (9) away from the anti-slip bearing (21), and the top end of the L-shaped bearing holder (802) is rotatably connected to a short shaft rod, and the upper and lower ends of the short shaft rod are respectively fixed to an anti-slip wheel (806) and a worm wheel (807); a rotating pull belt (803) is wound around the outer wall of the anti-slip wheel (806), and the two ends of the rotating pull belt (803) are respectively fixed to the ends of two reset springs (810); a servo motor (801) is fixed to the side of the L-shaped fixed arm beam (9) near the top end, and a worm that meshes with the worm wheel (807) is fixed to the top end of the output shaft of the servo motor (801).

5. A through-wall welding device according to claim 2, characterized in that: A counterweight extension rod (18) extending in the opposite direction is fixed to one end of the top end of the L-shaped fixed arm beam (9) away from the anti-rotation rod (804); a strip hole is formed at one end of the counterweight extension rod (18) away from the L-shaped fixed arm beam (9), and a counterweight block is slidably connected in the strip hole.

6. A through-wall welding device according to claim 2, characterized in that: The inner walls of both sides of the positioning slot (3) in the length direction are provided with roller grooves, and side rollers (4) are embedded in the roller grooves; the side surfaces of the top support plate (12) are fixed with lifting trapezoidal slats (14); and the highest point of the lifting trapezoidal slats (14) is lower than the plane where the lower surface of the turntable (5) is located.

7. A through-wall welding device according to claim 2, characterized in that: A bearing slot (121) is provided in the middle of the top supporting plate (12).

8. The through-wall welding equipment according to claim 2, characterized in that: The lower surface of the base (1) is reserved with an upwardly concave arcuate surface.

9. The through-wall welding equipment according to claim 2, characterized in that: A horizontally arranged reduction motor (13) is fixed to the lower surface of the top support plate (12), a worm sleeve (15) is fixed to the top end of the output shaft of the reduction motor (13), and a driven worm wheel (2) meshing with the worm sleeve (15) is sleeved on the outer wall of the transmission tube (16).

10. A through-wall welding device according to claim 9, characterized in that: The circumferential outer wall of the transmission tube (16) is provided with a plurality of side sections (161) distributed symmetrically with respect to the center near the bottom end, and both sides of the side sections (161) are embedded with electrical contact pieces connected in series to the alarm circuit. A contact plate (17) is fixed to the upper surface of the base (1) near the transmission tube (16), and a telescopic support rod is fixed to the top of the support plate (17), and a metal plate is fixed to the end of the extension rod of the telescopic support rod. The position of the side section (161) corresponds to the position of the positioning slot (3).

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