A welding shield

Abstract

The application provides a welding protection device and relates to the field of electric welding protection.The welding protection device comprises a moving seat and a handle.The bottom of the moving seat is connected with a universal wheel.The left top of the moving seat is fixedly connected with a welding machine.The right top of the moving seat is fixedly connected with an air pump.The rear end of the air pump is fixedly connected with an exhaust pipe.The front end of the air pump is fixedly connected with a three-prong pipe.The handle is arranged above the welding machine.The bottom of the handle is fixedly connected with a guide pipe.The top of the handle is fixedly connected with a sliding groove seat.The left and right sides of the sliding groove seat are transversely penetrated with side grooves.The left side of the sliding groove seat is fixedly connected with a horizontal rod.The hinge joint of the butt joint sleeve and the hinge joint sleeve can be adapted to the inner wall of a container with different curvatures through the cooperation of the torsional spring hinge, so that the user can extend the exhaust pipe out of the container and start the air pump, so that the air suction pipe can form a negative pressure area between the butt joint sleeve and the inner wall of the container, and the toxic gas generated by welding can be absorbed and discharged, thereby solving the problem that the existing protection device is not convenient for absorbing and discharging the toxic gas generated by welding.

Description

Technical Field

[0001] This invention relates to the field of welding protection technology, and in particular to a welding protection device. Background Technology

[0002] When performing construction work in oil refining and chemical enterprises, welders need to enter closed or semi-closed metal containers, equipment, pipelines, towers and storage tanks to perform welding. If toxic and harmful media and inert gases have been stored, transported or generated, workers can easily be poisoned or suffocated due to lack of oxygen if protective measures are not in place. Protective devices are required for protection. For example, invention patent CN104958131A discloses a facial protection device for electric welding, which is used to facilitate operators in performing electric welding operations. A frame and an air pump are fixed above the guide rail. Track wheels on the guide rail are located at the bottom of the frame and air pump. A lead screw is installed in the frame, with its upper part extending out of the frame. A lifting assembly for driving the lead screw to rise and fall is installed in the frame. A platform is fixed above the lead screw, and a base plate is hinged to the platform. A face mask is rotatably installed on the base plate. A swing assembly for driving the base plate to swing in a vertical plane is located between the platform and the base plate. A smoke extraction pipe and a smoke outlet pipe are connected to the air pump. The other end of the smoke extraction pipe is fixed to the platform, and the other end of the smoke outlet pipe extends into a water tank located above the air pump and filled with water. This device eliminates the need for the operator to hold the face mask, thus freeing up the operator's hands to hold and fix the workpiece to be welded.

[0003] However, the aforementioned protective devices are not convenient for adapting to the inner walls of containers with different curvatures, are not convenient for preventing welding slag from splashing everywhere and igniting petrochemical containers, are not convenient for absorbing and expelling toxic gases generated during welding, are not convenient for automatic electrode feeding, are not convenient for automatic compensation for electrode wear, and are not convenient for reducing the pressure on the operator's arms and wrists during welding. Summary of the Invention

[0004] In view of this, the present invention provides a welding protection device that uses a torsion spring hinge to allow the hinged butt sleeve and the hinged sleeve to fit and conform to the inner wall of a container with different curvatures. The user can extend the exhaust pipe out of the container and start the air pump, which can make the suction pipe create a negative pressure area between the butt sleeve and the inner side of the container wall, thereby absorbing and expelling the toxic gases generated during welding.

[0005] This invention provides a welding protection device, specifically comprising a movable base and a handle; the movable base is equipped with casters at its bottom, and a welding machine is fixedly connected to the top left side of the movable base; an air pump is fixedly connected to the top right side of the movable base, an exhaust pipe is fixedly connected to the rear end of the air pump, and a three-pronged pipe is fixedly connected to the front end of the air pump; the handle is positioned above the welding machine, a guide tube is fixedly connected to the bottom of the handle, and a sliding base is fixedly connected to the top of the handle; side grooves extend laterally through the left and right sides of the sliding base; a crossbar is fixedly connected to the left side of the sliding base, and a button is connected to the rear side of the crossbar; the inner side of the sliding base is slidably connected to... The device includes a reciprocating lead screw, with ring frames fixedly connected to both sides. The ring frames are slidably connected to the inner side of the side groove. A bottom hook is fixedly connected to the bottom of the ring frames. A power base is fixedly connected to the top of the ball nut seat of the reciprocating lead screw. A threaded rod is threadedly connected to the top of the power base. A clamp is rotatably connected to the bottom of the threaded rod. A support spring is fixedly connected to the rear end of the reciprocating lead screw. The rear end of the support spring is fixedly connected to the rear end of the inner side of the slide seat. An adjustment knob is coaxially connected to the rear end of the lead screw. A toothed tube is coaxially connected to the front end of the lead screw. A mating sleeve is fixedly connected to the front end of the slide seat.

[0006] Optionally, torsion spring hinges are fixedly connected to the rear ends of the left and right sides of the docking sleeve, and hinged sleeves are provided on the sides of the torsion spring hinges through rotational connection. The three-pronged tube is sleeved inside the guide tube, and the front end of the three-pronged tube is fixedly connected to the inside of the docking sleeve. An air intake tube is fixedly connected to the front end of the three-pronged tube.

[0007] Optionally, a protective glass is fixedly connected inside the docking sleeve, an elastic conical tube is fixedly connected inside the protective glass, and a protective tube is fixedly connected inside the elastic conical tube.

[0008] Optionally, the front ends of the mating sleeve and the hinge sleeve are fixedly connected with brush edges, and the front side of the hinge sleeve is provided with a support wheel through a rotatable connection.

[0009] Optionally, a speed reducer is fixedly connected to the front side of the mating sleeve, and a bevel gear A is coaxially connected to the top of the output shaft of the speed reducer, and a bevel gear B is coaxially connected to the bottom of the input shaft of the speed reducer.

[0010] Optionally, a bevel gear C is rotatably connected to the top of the reducer, and the bevel gear C meshes with the bevel gear A for transmission. A rack is coaxially connected to the rear end of the bevel gear C, and the rack is slidably connected to the inside of the toothed tube.

[0011] Optionally, a slant frame is fixedly connected to the bottom front side of the docking sleeve, and a bottom shaft is provided at the top of the slant frame via a rotatable connection. A bevel gear D is coaxially connected to the left end of the bottom shaft, and the bevel gear D meshes with the bevel gear B for transmission.

[0012] Optionally, a bevel gear E is coaxially connected to the right end of the bottom shaft, a drive wheel is rotatably connected to the bottom right side of the inclined frame, and a bevel gear F is coaxially connected to the top of the drive wheel. The bevel gear E and the bevel gear F mesh and drive each other. A lighting lamp is fixedly connected to the front end of the mating sleeve, and the lighting lamp circuit is connected to the button.

[0013] Beneficial effects

[0014] According to various embodiments of the present invention, the protective device can abut the mating sleeve against the curved side of the inner side of the petrochemical container, and can support the curved side of the container through the support wheel and the drive wheel, which can limit the distance between the inner wall of the container and the mating sleeve, and can prevent excessive wear of the brush edge base. After the mating sleeve and the hinge sleeve come into contact with the curved side of the inner wall of the container, they are elastically supported by the support wheel. With the cooperation of the torsion spring hinge, the hinged mating sleeve and the hinge sleeve can be adapted to fit the inner wall of the container with different curvatures. The mating sleeve and the hinge sleeve can prevent welding slag from splashing everywhere and igniting the residual grease at the bottom of the container.

[0015] In addition, when welding, the user can extend the exhaust pipe out of the container and start the air pump. This allows the suction pipe to create a negative pressure zone between the mating sleeve and the inner wall of the container, which can absorb and expel the toxic gases generated during welding.

[0016] In addition, the dark-tinted protective glass can reduce welding sparks during welding, eliminating the need to hold the welding mask with your hands, making it easier to operate with both hands. When it is necessary to observe the weld, the user can press a button to control the lighting to illuminate the welding area.

[0017] In addition, when welding along the inner wall of a petrochemical container, the welding rod inside the electrode holder can be moved vertically back and forth by a reciprocating telescopic cylinder, which can automatically move the welding rod and form a sawtooth structure in the weld. This makes it easier to control the temperature of the molten pool, and gives the weld a certain width and height, which can reduce wrist fatigue for the user.

[0018] In addition, users can hold the welding clamp by gripping the handle and crossbar with both hands respectively. Holding it with both hands helps to maintain the stability of the welding rod, which can reduce welding fatigue and reduce the error in container welding.

[0019] Furthermore, during the movement of the device along the curved side of the petrochemical container, the bevel gear F at the top of the drive wheel can drive the bevel gear E to rotate, the bevel gear E can drive the coaxial bevel gear D to rotate, the bevel gear D can drive the bevel gear B to rotate, the input shaft of the reducer can drive the bevel gear A at the top of the output shaft to rotate through linkage, the bevel gear A can drive the bevel gear C to rotate, the toothed rod at the rear end of the bevel gear C can drive the toothed tube to rotate, the toothed tube can drive the lead screw of the reciprocating screw to rotate at a reduced speed, and the ball nut seat of the reciprocating screw can drive the welding rod to move forward. This allows the welding rod to extend forward according to the welding length during the moving welding process along the inner wall of a large petrochemical container, and can automatically compensate for welding rod wear.

[0020] In addition, during welding, the user can pull the bottom hook, which will cause the reciprocating screw to move back and forth inside the slide seat. The distance between the welding rod and the workpiece can be easily controlled by the fingers, which makes it easier to drive the welding rod to strike the inner wall of the container to start the arc, thus reducing the pressure on the operator's arms and wrists during welding. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0022] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0023] In the attached diagram:

[0024] Figure 1 This is a three-dimensional disassembled structural diagram of the protective device slide seat shown in the accompanying drawings of the specification of this invention.

[0025] Figure 2 This is the invention Figure 1 A magnified view of part A in the diagram.

[0026] Figure 3 This is a three-dimensional structural diagram of the left rear side of the protective device docking sleeve, which is shown in the accompanying drawings of the specification of this invention.

[0027] Figure 4 This is the invention Figure 3 A magnified view of part B in the diagram.

[0028] Figure 5 This is a three-dimensional structural diagram of the front side of the protective device docking sleeve, which is shown in the accompanying drawings of the specification of this invention.

[0029] Figure 6 This is the invention Figure 5 A magnified view of part C in the diagram.

[0030] Figure 7 This is the invention Figure 5 A magnified view of part of D.

[0031] Figure 8 This is a top-view perspective view of the overall structure of the protective device shown in the accompanying drawings of the specification of this invention.

[0032] Figure 9 This is a three-dimensional disassembly diagram of the hinge sleeve of the protective device shown in the accompanying drawings of the specification of this invention.

[0033] Figure 10 This is a three-dimensional structural diagram of the front side of the protective device shown in the accompanying drawings of the specification of this invention.

[0034] List of reference numerals

[0035] 1. Portable seat;

[0036] 101. Welding machine;

[0037] 2. Air pump;

[0038] 201. Exhaust pipe; 202. Three-way pipe; 203. Intake pipe;

[0039] 3. Handle;

[0040] 301. Conduit; 302. Slide seat; 303. Side groove; 304. Crossbar; 305. Button;

[0041] 4. Reciprocating lead screw;

[0042] 401. Ring frame; 4011. Bottom hook; 402. Electrical connector; 403. Clamp; 404. Threaded rod; 405. Support spring; 406. Adjusting knob; 407. Gear tube;

[0043] 5. Connecting sleeve;

[0044] 501. Hinge sleeve; 502. Protective glass; 503. Torsion spring hinge; 504. Flexible tapered tube; 505. Protective tube; 506. Brush edge; 507. Support wheel; 508. Diagonal bracket;

[0045] 6. Gearbox;

[0046] 601. Bevel gear A; 602. Bevel gear B; 603. Bevel gear C; 604. Gear rack;

[0047] 7. Bottom shaft;

[0048] 701. Bevel gear D; 702. Bevel gear E; 703. Drive wheel; 704. Bevel gear F;

[0049] 8. Lighting. Detailed Implementation

[0050] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0051] Example: Please refer to Figures 1 to 10 As shown:

[0052] This invention provides a welding protection device, including a movable base 1 and a handle 3. A caster wheel is connected to the bottom of the movable base 1, and a welding machine 101 is fixedly connected to the top left side of the movable base 1. An air pump 2 is fixedly connected to the top right side of the movable base 1, with an exhaust pipe 201 fixedly connected to the rear end of the air pump 2 and a three-pronged pipe 202 fixedly connected to the front end of the air pump 2. The handle 3 is positioned above the welding machine 101, with a guide tube 301 fixedly connected to the bottom of the handle 3 and a sliding seat 302 fixedly connected to the top of the handle 3. Side grooves 303 extend laterally through the left and right sides of the sliding seat 302. A crossbar 304 is fixedly connected to the left side of the sliding seat 302, and a button 305 is connected to the rear side of the crossbar 304. A reciprocating screw 4 is slidably connected to the inner side of the sliding seat 302, and a ring frame 401 is fixedly connected to the left and right sides of the reciprocating screw 4. The ring frame 401 is slidably connected to the inner side of the side grooves 303, and a bottom hook 4011 is fixedly connected to the bottom of the ring frame 401. A power connector 402 is fixedly connected to the top of the ball nut seat of the reciprocating screw 4. A threaded rod 404 is threadedly connected to the top of the power connector 402. A clamp 403 is rotatably connected to the bottom of the threaded rod 404. A support spring 405 is fixedly connected to the rear end of the reciprocating screw 4. The rear end of the support spring 405 is fixedly connected to the rear end of the inner side of the slide seat 302. An adjustment knob 406 is coaxially connected to the rear end of the screw of the reciprocating screw 4. A toothed tube 407 is coaxially connected to the front end of the screw of the reciprocating screw 4. A mating sleeve 5 is fixedly connected to the front end of the slide seat 302. The clamp 403 and the inner side of the power connector 402 hold the welding rod. The power connector 402 is connected to the welding machine 101 through a wire. The user can hold the welding clamp by holding the handle 3 and the crossbar 304 with both hands. Holding it with both hands helps to maintain the stability of the welding rod, which can reduce welding fatigue and reduce the error of container welding.

[0053] like Figures 1 to 8As shown, torsion spring hinges 503 are fixedly connected to the rear ends of the left and right sides of the docking sleeve 5. A hinge sleeve 501 is rotatably connected to the side of the torsion spring hinge 503. A three-pronged pipe 202 is sleeved inside the guide tube 301. The front end of the three-pronged pipe 202 is fixedly connected to the inside of the docking sleeve 5. A suction pipe 203 is fixedly connected to the front end of the three-pronged pipe 202. A protective glass 502 is fixedly connected inside the docking sleeve 5. An elastic conical tube 504 is fixedly connected inside the protective glass 502. A protective tube 505 is fixedly connected to the inside of the elastic conical tube 504. A brush edge 506 is fixedly connected to the front ends of the docking sleeve 5 and the hinge sleeve 501. A support wheel 507 is rotatably connected to the front side of the hinge sleeve 501. This allows the docking sleeve 5 to be pressed against the curved side of the inner side of the petrochemical container. The support wheel 507 and the drive wheel 703 support the curved side of the container, limiting the distance between the inner wall of the container and the docking sleeve 5, thus preventing... The base of the brush edge 506 is excessively worn. After the mating sleeve 5 and the hinge sleeve 501 come into contact with the curved side of the inner wall of the container, they are elastically supported by the support wheel 507. By cooperating with the torsion spring hinge 503, the hinged mating sleeve 5 and the hinge sleeve 501 can adapt and fit the inner wall of the container with different curvatures. The mating sleeve 5 and the hinge sleeve 501 can prevent welding slag from splashing everywhere and igniting the grease at the bottom of the container. When welding, the user can extend the exhaust pipe 201 out of the container and start the air pump 2. The suction pipe 203 can make the mating sleeve 5 and the inner side of the inner wall of the container form a negative pressure area, which can absorb the toxic gas generated during welding. When welding, the welding sparks can be weakened by the dark protective glass 502. The welding mask does not need to be supported by hand, making it easier to operate with both hands. When it is necessary to observe the weld, the user can press the button 305 to control the lighting lamp 8 to illuminate the welding area.

[0054] like Figures 2 to 10As shown, a reducer 6 is fixedly connected to the front side of the mating sleeve 5. A bevel gear A601 is coaxially connected to the top of the output shaft of the reducer 6, and a bevel gear B602 is coaxially connected to the bottom of the input shaft of the reducer 6. A bevel gear C603 is rotatably connected to the top of the reducer 6, and the bevel gear C603 meshes with the bevel gear A601 for transmission. A rack 604 is coaxially connected to the rear end of the bevel gear C603, and the rack 604 is slidably connected to the inner side of the toothed tube 407. A slant bracket 508 is fixedly connected to the front bottom of the mating sleeve 5, and a rack 604 is rotatably connected to the top of the slant bracket 508. A base shaft 7 is provided, with a bevel gear D701 coaxially connected to its left end. Bevel gear D701 meshes with bevel gear B602 for transmission. A bevel gear E702 coaxially connected to the right end of the base shaft 7. A drive wheel 703 is rotatably connected to the bottom right side of the inclined frame 508, with a bevel gear F704 coaxially connected to its top. Bevel gears E702 and F704 mesh for transmission. A lighting lamp 8 is fixedly connected to the front end of the docking sleeve 5. The circuit of the lighting lamp 8 is connected to a button 305. During the movement of the device along the curved side of the petrochemical container, it can... This causes the bevel gear F704 at the top of the drive wheel 703 to drive the bevel gear E702 to rotate. The bevel gear E702 then drives the coaxial bevel gear D701 to rotate, which in turn drives the bevel gear B602. This, in turn, causes the input shaft of the reducer 6 to drive the bevel gear A601 at the top of the output shaft to rotate. The bevel gear A601 then drives the bevel gear C603 to rotate. The rack 604 at the rear end of the bevel gear C603 then drives the toothed tube 407 to rotate, which in turn drives the reciprocating screw 4. The lever decelerates and rotates, causing the ball nut seat of the reciprocating screw 4 to move the welding rod forward. This allows the welding rod to extend forward according to the welding length during welding along the inner wall of a large petrochemical container, and can automatically compensate for welding rod wear. During welding, the user can pull the bottom hook 4011, which will cause the bottom hook 4011 to move the reciprocating screw 4 back and forth inside the slide seat 302. The distance between the welding rod and the workpiece can be easily controlled with the fingers, making it easier to drive the welding rod to strike the inner wall of the container to ignite the arc, and reducing the pressure on the operator's arm and wrist during welding.

[0055] In another embodiment of the present invention, a reciprocating telescopic cylinder is provided between the electrical contact 402 and the ball nut seat of the reciprocating screw 4. When welding along the inner wall of the petrochemical container, the welding rod inside the electrical contact 402 can be driven to move vertically back and forth through the reciprocating telescopic cylinder, which can automatically move the welding rod and form a sawtooth structure in the weld, which is convenient for controlling the temperature of the molten pool and gives the weld a certain width and height, which can reduce the fatigue of the user's wrist.

[0056] The specific usage and function of this embodiment: In this invention, the user can hold the welding clamp by gripping the handle 3 and the crossbar 304 with both hands respectively. Holding it with both hands helps maintain the stability of the welding rod, reduces welding fatigue, and minimizes welding errors in containers. The mating sleeve 5 can be pressed against the curved side of the inner side of the petrochemical container. The support wheel 507 and drive wheel 703 support the curved side of the container, limiting the distance between the inner wall of the container and the mating sleeve 5, preventing excessive wear of the brush edge 506 base. After the mating sleeve 5 and the hinge sleeve 501 contact the curved side of the inner wall of the container, the support wheel 507 provides elastic support. Through cooperation with the torsion spring hinge 503, the hinged mating sleeve 5 and the hinge... The sleeve 501 adapts to fit the inner walls of containers with different curvatures. The butt sleeve 5 and hinged sleeve 501 prevent welding slag from splattering and igniting grease at the bottom of the container. During welding, the user can extend the exhaust pipe 201 out of the container and start the air pump 2. This allows the suction pipe 203 to create a negative pressure zone between the butt sleeve 5 and the inner wall of the container, absorbing the toxic gases produced during welding. The dark-tinted protective glass 502 weakens welding sparks during welding, eliminating the need for hand support of the welding mask and facilitating two-handed operation. When observation of the weld is needed, the user can press button 305 to control the lighting lamp 8 to illuminate the welding area. As the device moves along the curved inner side of the petrochemical container, it can... The bevel gear F704 at the top of the drive wheel 703 drives the bevel gear E702 to rotate, which in turn drives the coaxial bevel gear D701 to rotate. This, in turn, drives the bevel gear B602 to rotate. The input shaft of the reducer 6, through linkage, drives the bevel gear A601 at the top of the output shaft to rotate. This, in turn, drives the bevel gear C603 to rotate. The rack 604 at the rear end of bevel gear C603 drives the toothed tube 407 to rotate. This, in turn, drives the lead screw of the reciprocating screw 4 to rotate at reduced speed. Finally, the ball nut seat of the reciprocating screw 4 drives the welding rod to move forward. This allows the user to move along the large petrochemical container... During the moving welding process on the inner wall, the welding rod extends forward according to the welding length, which can automatically compensate for the welding rod wear. During welding, the user can pull the bottom hook 4011, which can drive the reciprocating screw 4 to move back and forth inside the slide seat 302. The distance between the welding rod and the workpiece can be easily controlled by the fingers, which facilitates the welding rod to strike the inner wall of the container to start the arc, and reduces the pressure on the operator's arm and wrist during welding. When welding along the inner wall of the petrochemical container, the welding rod inside the electrode seat 402 can be moved vertically back and forth by the reciprocating telescopic cylinder, which can automatically move the welding rod and make the weld seam form a sawtooth structure, which facilitates the control of the molten pool temperature and makes the weld seam have a certain width and height.

Claims

1. A welding protection device, characterized in that, include: A movable seat (1) and a handle (3); the bottom of the movable seat (1) is connected to a caster wheel, and a welding machine (101) is fixedly connected to the top left side of the movable seat (1); an air pump (2) is fixedly connected to the top right side of the movable seat (1), an exhaust pipe (201) is fixedly connected to the rear end of the air pump (2), a three-pronged pipe (202) is fixedly connected to the front end of the air pump (2), the handle (3) is located above the welding machine (101), a conduit (301) is fixedly connected to the bottom of the handle (3), a slide seat (302) is fixedly connected to the top of the handle (3), side grooves (303) are transversely penetrating on the left and right sides of the slide seat (302), a crossbar (304) is fixedly connected to the left side of the slide seat (302), and the rear side of the crossbar (304) is connected to... A button (305) is provided; a reciprocating screw (4) is slidably connected to the inner side of the slide seat (302), and a ring frame (401) is fixedly connected to the left and right sides of the reciprocating screw (4). The ring frame (401) is slidably connected to the inner side of the side groove (303). A bottom hook (4011) is fixedly connected to the bottom of the ring frame (401). A power socket (402) is fixedly connected to the top of the ball nut seat of the reciprocating screw (4). A threaded rod (404) is threadedly connected to the top of the power socket (402). A clamp (403) is rotatably connected to the bottom of the threaded rod (404). A support spring (405) is fixedly connected to the rear end of the reciprocating screw (4). The rear end of the support spring (405) is fixed to the rear end of the inner side of the slide seat (302). The reciprocating screw (4) is coaxially connected to the rear end of the screw and an adjustment knob (406) is coaxially connected to the front end of the screw. A toothed tube (407) is coaxially connected to the front end of the slide seat (302). A docking sleeve (5) is fixedly connected to the front end of the slide seat (302). Torsion spring hinges (503) are fixedly connected to the rear ends of the left and right sides of the docking sleeve (5). A hinge sleeve (501) is rotatably connected to the side of the torsion spring hinge (503). A three-way tube (202) is sleeved inside the guide tube (301). The front end of the three-way tube (202) is fixedly connected to the inside of the docking sleeve (5). An air intake tube (203) is fixedly connected to the front end of the three-way tube (202). A reducer (6) is fixedly connected to the front side of the docking sleeve (5). The output shaft of the reducer (6) is top of the reducer. A bevel gear A (601) is coaxially connected to the bottom of the input shaft of the reducer (6), and a bevel gear B (602) is coaxially connected to the bottom of the input shaft of the reducer (6); a bevel gear C (603) is rotatably connected to the top of the reducer (6), and the bevel gear C (603) meshes with the bevel gear A (601) for transmission; a rack (604) is coaxially connected to the rear end of the bevel gear C (603), and the rack (604) is slidably connected to the inside of the toothed tube (407); a slant frame (508) is fixedly connected to the front bottom of the mating sleeve (5), and a bottom shaft (7) is rotatably connected to the top of the slant frame (508); a bevel gear D (701) is coaxially connected to the left end of the bottom shaft (7), and the bevel gear D (701) meshes with the bevel gear B (602) for transmission;A bevel gear E (702) is coaxially connected to the right end of the bottom shaft (7). A drive wheel (703) is rotatably connected to the bottom right side of the inclined frame (508). A bevel gear F (704) is coaxially connected to the top of the drive wheel (703). The bevel gear E (702) and the bevel gear F (704) mesh and transmit power.

2. The welding protection device as described in claim 1, characterized in that: The docking sleeve (5) is fixedly connected to a protective glass (502), the protective glass (502) is fixedly connected to an elastic conical tube (504), and the elastic conical tube (504) is fixedly connected to a protective tube (505) on its inner side.

3. The welding protection device as described in claim 2, characterized in that: The front ends of the docking sleeve (5) and the hinge sleeve (501) are fixedly connected with brush edges (506), and the front side of the hinge sleeve (501) is rotatably connected with a support wheel (507).

4. The welding protection device as described in claim 1, characterized in that: The front end of the docking sleeve (5) is fixedly connected to a lighting lamp (8), and the circuit of the lighting lamp (8) is connected to the button (305).

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