阅读说明：本技术 一种汽车钣金焊接设备 (Car panel beating welding equipment ) 是由 刘艳芝 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种汽车钣金焊接设备,包括固定板,所述固定板的两侧外壁均滑动连接有槽钢滑轨,且两个槽钢滑轨的底部外壁固定连接有固定座,所述固定座与固定板之间设置有多个缓冲垫,所述固定板的顶部外壁开设有环形槽,且环形槽的内壁滑动设置有多个滚珠,且滚珠的外壁滚动连接有滑块,所述滑块顶部外壁的两侧均固定连接有支撑杆,且两个支撑杆相对的一侧外壁之间固定连接有支撑架,所述支撑架的下端通过轴承转动连接有螺纹杆。本发明通过气囊吸气时产生的吸力将有害气体吸收至环形通口的内部,从而通过净化机构对有害气体进行净化处理,同时凸齿在环形通口的内部呈啮合分布,以便于使有害气体分布于环形通口的内部。(The invention discloses automobile sheet metal welding equipment which comprises a fixed plate, wherein channel steel slide rails are connected to the outer walls of the two sides of the fixed plate in a sliding mode, fixed seats are fixedly connected to the outer walls of the bottoms of the two channel steel slide rails, a plurality of cushion pads are arranged between the fixed seats and the fixed plate, an annular groove is formed in the outer wall of the top of the fixed plate, a plurality of balls are arranged on the inner wall of the annular groove in a sliding mode, a sliding block is connected to the outer walls of the balls in a rolling mode, supporting rods are fixedly connected to the two sides of the outer wall of the top of the sliding block, a supporting frame is fixedly connected between the outer walls of the two opposite sides of the two supporting rods, and the lower end of the supporting frame is rotatably connected with a threaded rod through a bearing. According to the invention, harmful gas is absorbed into the annular through opening through the suction force generated when the air bag sucks air, so that the harmful gas is purified through the purification mechanism, and meanwhile, the convex teeth are meshed and distributed in the annular through opening, so that the harmful gas is distributed in the annular through opening.)

1. The automobile sheet metal welding equipment comprises a fixing plate (2), wherein channel steel slide rails are connected to the outer walls of the two sides of the fixing plate (2) in a sliding mode, and the outer walls of the bottom of the two channel steel slide rails are fixedly connected with a fixing seat (1), a plurality of cushion pads (42) are arranged between the fixing seat (1) and the fixing plate (2), the automobile sheet metal welding equipment is characterized in that a ring groove (4) is formed in the outer wall of the top of the fixing plate (2), a plurality of balls (25) are arranged on the inner wall of the ring groove (4) in a sliding mode, a sliding block (5) is connected to the outer wall of each ball (25) in a rolling mode, supporting rods (6) are fixedly connected to the two sides of the outer wall of the top of the sliding block (5), a supporting frame (7) is fixedly connected between the outer walls of the two opposite sides of the two supporting rods (6), a threaded rod (12) is connected to the lower end of the supporting frame (7) through a bearing in a rotating mode, and threaded blocks (10) are connected to the outer wall of the threaded rod (12), the outer wall of the threaded rod (12) is fixedly connected with the rotary table (8), the bottom outer wall of the threaded block (10) is fixedly connected with the welding mechanism (11), the welding mechanism (11) is composed of a welding box (27) and a welding gun (29), a welding pipe (28) is arranged between the welding box (27) and the welding gun (29), the welding pipe (28) is made of flexible materials, the outer wall of the welding gun (29) is provided with a limiting block (30), the outer wall of the limiting block (30) is provided with a transparent protective cover (13), the welding gun (29) is positioned inside the transparent protective cover (13), the outer wall of the transparent protective cover (13) is provided with an annular through hole (31), a through hole (32) is formed in the inner wall of one side of the annular through hole (31), the inner walls of the two sides of the annular through hole (31) are both provided with a plurality of convex teeth (33), and the two adjacent convex teeth (33) are in meshed distribution, the top outer wall of annular opening (31) is provided with gasbag (38), and one side outer wall of gasbag (38) is provided with air cock (39), the inner wall joint of annular opening (31) has purification mechanism (34).

2. The automobile sheet metal welding equipment according to claim 1, wherein the purification mechanism (34) is composed of a shell and a filter screen (37), the shell is connected with the filter screen (37) through bolts, inverted whiskers (35) are fixedly connected to the position, close to the bottom, of the inner wall of the shell, and the inverted whiskers (35) are made of flexible materials.

3. The automobile sheet metal welding equipment according to claim 2, characterized in that the inner wall of the shell is rotatably connected with a rotating frame (36), the rotating frame (36) is composed of a rotating rod and blades, and the blades are irregularly distributed on the outer wall of the rotating rod.

4. The automobile sheet metal welding equipment according to claim 1, characterized in that the top outer wall of the fixing plate (2) is fixedly connected with a fixing mechanism (3), the fixing mechanism (3) comprises a fixing frame (14) and a protection plate (22), the outer walls of the two sides of the fixing frame (14) are respectively provided with a fixing hole, the inner walls of the two fixing holes are respectively and slidably connected with a fixing rod (16), the outer wall of one side of the fixing rod (16) is fixedly connected with a clamping block (15), the outer walls of the two sides of the fixing frame (14) are respectively and fixedly connected with a connecting frame (18), the outer wall of the connecting frame (18) is rotatably connected with a connecting plate (17), the outer walls of the two sides of the fixing frame (14) are respectively provided with a fixing port close to the top, the inner walls of the two fixing ports are respectively and slidably connected with a push rod (20), the outer wall of one side of the push rod (20) is fixedly connected with a supporting block (19), and a telescopic rod (21) is fixedly connected between the fixing frame (14) and the protection plate (22), the outer wall of one side of the protection plate (22) is fixedly connected with a clamping plate (23).

5. The automobile sheet metal welding device according to claim 4, characterized in that springs (24) are sleeved on the outer walls of the two fixing rods (16).

6. The automobile sheet metal welding equipment according to claim 4, characterized in that the inner walls of one sides of the two clamping plates (23) are fixedly connected with the extrusion plates (40), the extrusion plates (40) are made of rubber, the outer wall of one side of the extrusion plates (40) is provided with a plurality of convex ribs (41), and the clamping plates (23) are h-shaped.

7. The automobile sheet metal welding equipment according to claim 1, wherein the circumferential inner wall of the annular groove (4) is connected with electromagnets (26) distributed in an annular array through bolts, positioning blocks are fixed on two sides of the circumferential outer wall of the sliding block (5), and the positioning blocks are made of magnetic materials.

8. The automobile sheet metal welding equipment according to claim 1, characterized in that a guide rail (9) is fixedly connected to the top inner wall of the support frame (7), and a sliding connection is formed between the guide rail (9) and the thread block (10).

Technical Field

The invention relates to the technical field of automobile metal plates, in particular to automobile metal plate welding equipment.

Background

The welding technology, also known as connection engineering, is an important material processing technology, and is a non-detachable connection method, which is a method for realizing material connection of workpieces under the action of heating or pressurizing or under the combined action of heating and pressurizing, such as plastic manufacturing technology and technology, sheet metal welding is one of common welding forms, and sheet metal welding equipment is often required.

When current equipment is welding process to the car panel beating, because can produce the electric arc phenomenon during the welding, and electric arc can cause the burn to staff's eyes, consequently, need the staff to wear the goggles, nevertheless, the goggles is when live time is longer, can amass a large amount of dirt on the surface of goggles, and the dirt can lead to the fact the interference to people's sight, consequently, can cause the deviation to the welding of car panel beating, consequently, need for a car panel beating welding equipment to solve such kind of problem urgently.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides automobile sheet metal welding equipment.

In order to achieve the purpose, the invention adopts the following technical scheme:

an automobile sheet metal welding device comprises a fixed plate, wherein channel steel slide rails are connected to the outer walls of the two sides of the fixed plate in a sliding manner, fixed seats are fixedly connected to the outer walls of the bottoms of the two channel steel slide rails, a plurality of cushion pads are arranged between the fixed seats and the fixed plate, a ring groove is formed in the outer wall of the top of the fixed plate, a plurality of balls are arranged on the inner wall of the ring groove in a sliding manner, a sliding block is connected to the outer wall of each ball in a rolling manner, supporting rods are fixedly connected to the two sides of the outer wall of the top of the sliding block, a supporting frame is fixedly connected between the outer walls of the opposite sides of the two supporting rods, a threaded rod is connected to the lower end of the supporting frame through rotation of a bearing, a threaded block is connected to the outer wall of the threaded rod in a threaded manner, a rotary table is fixedly connected to the outer wall of the threaded rod, a welding mechanism is fixedly connected to the outer wall of the bottom of the threaded block, and consists of a welding box and a welding gun, and be provided with the welded tube between weld box and the welder, the welded tube is flexible material, welder's outer wall is provided with the stopper, and the outer wall of stopper is provided with transparent protection casing, and welder is located transparent protection casing's inside, annular opening has been seted up to transparent protection casing's outer wall, and one side inner wall of annular opening has seted up the through-hole, the both sides inner wall of annular opening all is provided with a plurality of dogtooths, and is the meshing between two adjacent dogtooths and distributes, the top outer wall of annular opening is provided with the gasbag, and one side outer wall of gasbag is provided with the air cock, the inner wall joint of annular opening has purification mechanism.

Preferably, purification mechanism comprises casing and filter screen, and through bolted connection between casing and the filter screen, the inner wall of casing is close to the position fixedly connected with falling beard of bottom, and the falling beard is flexible material.

Preferably, the inner wall of the shell is rotatably connected with a rotating frame, the rotating frame consists of a rotating rod and blades, and the blades are irregularly distributed on the outer wall of the rotating rod.

Preferably, the top outer wall fixedly connected with fixed establishment of fixed plate, and fixed establishment includes mount and guard plate, the fixed orifices has all been seted up to the both sides outer wall of mount, the equal sliding connection of inner wall of two fixed orifices has the dead lever, one side outer wall fixedly connected with clamp splice of dead lever, the equal fixedly connected with link of both sides outer wall of mount, and the outer wall rotation of link is connected with the connecting plate, the position that the both sides outer wall of mount is close to the top has seted up fixed mouthful, the inner wall sliding connection of two fixed mouthful has the push rod, one side outer wall fixedly connected with supporting shoe of push rod, fixedly connected with telescopic link between mount and the guard plate, one side outer wall fixedly connected with splint of guard plate.

Preferably, springs are sleeved on the outer walls of the two fixing rods.

Preferably, two the equal fixedly connected with stripper plate of one side inner wall of splint, and the stripper plate is the rubber material, and one side outer wall of stripper plate is provided with a plurality of beads, and the shape of splint is the h type.

Preferably, the circumferential inner wall of the annular groove is connected with electromagnets distributed in an annular array through bolts, positioning blocks are fixed on two sides of the circumferential outer wall of the sliding block, and the positioning blocks are made of magnetic materials.

Preferably, the top inner wall of the support frame is fixedly connected with a guide rail, and the guide rail and the thread block form sliding connection.

The invention has the beneficial effects that:

1. the invention is provided with the transparent protective cover, the air bag, the air nozzle, the annular through hole, the convex teeth and the purification mechanism, when the automobile metal plate is welded, a large amount of harmful gas can be generated, the harmful gas is absorbed into the annular through hole through the suction force generated when the air bag sucks air, so that the harmful gas is purified by the purification mechanism, meanwhile, the convex teeth are in meshing distribution in the annular through hole, the harmful gas can flow in a wave shape in the annular through hole, so that the harmful gas can be distributed in the annular through hole, nitrogen oxides contained in the harmful gas are red brown gas, therefore, the red brown gas is distributed in the transparent protective cover, the burn of electric arcs to working personnel can be effectively prevented through the matching between the red brown gas and the transparent protective cover, in addition, after the welding is finished, nitrogen oxides are discharged from the interior of the annular through opening;

2. the automobile metal plate clamping device is provided with a fixing mechanism, when the automobile metal plate needs to be welded, the automobile metal plate needing to be welded is placed in a fixing frame, when the automobile metal plate is located between two clamping plates, the automobile metal plate moves downwards through the gravity of the automobile metal plate, so that clamping blocks at the bottoms of two sides of the metal plate are extruded, the clamping blocks drive a fixing rod to move towards one side, one end of the fixing rod jacks up a connecting plate, the other side of the connecting plate is offset to be in contact with a push rod through the lever principle, a protection plate is driven to move through the push rod, the two sides of the automobile metal plate are clamped and fixed through the clamping plates, and the clamping effect of the clamping plates on the automobile metal plate can be improved through the h-shaped clamping plates, the extrusion plates and the convex edges in a matching mode;

3. the automobile metal plate welding device is provided with the annular groove, the ball, the sliding block and the electromagnet, so that the sliding block can slide in the annular groove to facilitate the rotation of the welding mechanism, the automobile metal plate can be conveniently welded, the friction force between the sliding block and the annular groove can be reduced through the ball, the influence on the sliding of the sliding block due to the larger friction force is prevented, the sliding block can be fixed as required by adsorbing the positioning blocks on the outer wall of the sliding block through the electromagnet which is selected to be electrified and distributed annularly, and the automobile metal plate can be conveniently welded.

Drawings

FIG. 1 is a schematic cross-sectional structural view of an automobile sheet metal welding device provided by the invention;

FIG. 2 is a schematic structural diagram of a fixing mechanism of the automobile sheet metal welding equipment provided by the invention;

FIG. 3 is a schematic structural diagram of a part A of the automobile sheet metal welding equipment provided by the invention;

FIG. 4 is a schematic structural diagram of a welding mechanism of the automobile sheet metal welding equipment provided by the invention;

FIG. 5 is a schematic structural view of a transparent protective cover of the automobile sheet metal welding equipment provided by the invention;

fig. 6 is a schematic view of a clamping plate structure of the automobile sheet metal welding equipment provided by the invention.

In the drawings: 1-a fixed seat; 2, fixing a plate; 3-a fixing mechanism; 4-an annular groove; 5-a slide block; 6-supporting rods; 7-a support frame; 8-rotating disc; 9-a guide rail; 10-a thread block; 11-a welding mechanism; 12-a threaded rod; 13-a transparent protective cover; 14-a fixing frame; 15-a clamping block; 16-a fixing rod; 17-a connecting plate; 18-a connecting frame; 19-a support block; 20-a push rod; 21-a telescopic rod; 22-protective plate; 23-a splint; 24-a spring; 25-a ball bearing; 26-an electromagnet; 27-a welding box; 28-welding a pipe; 29-a welding torch; 30-a limiting block; 31-a circular through opening; 32-a via hole; 33-convex teeth; 34-a purification mechanism; 35-inverted beard; 36-a turret; 37-a filter screen; 38-an air bag; 39-air tap; 40-extruding a plate; 41-ribs; 42-buffer pad.

Detailed Description

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-6, an automobile sheet metal welding device comprises a fixing plate 2, wherein channel steel slide rails are slidably connected to the outer walls of two sides of the fixing plate 2, the outer walls of the bottoms of the two channel steel slide rails are connected with a fixing seat 1 through bolts, a plurality of cushion pads 42 are arranged between the fixing seat 1 and the fixing plate 2, a ring groove 4 is formed in the outer wall of the top of the fixing plate 2, a plurality of balls 25 are slidably arranged on the inner wall of the ring groove 4, the outer wall of each ball 25 is connected with a sliding block 5 in a rolling manner, two sides of the outer wall of the top of the sliding block 5 are connected with supporting rods 6 through bolts, a supporting frame 7 is connected between the outer walls of the opposite sides of the two supporting rods 6 through bolts, the lower end of the supporting frame 7 is rotatably connected with a threaded rod 12 through a bearing, a threaded block 10 is in threaded connection with the outer wall of the threaded rod 12, a rotary table 8 is connected with the outer wall of the threaded rod 12 through bolts, and a welding mechanism 11 is connected with the outer wall of the bottom of the threaded block 10 through bolts, the welding mechanism 11 is composed of a welding box 27 and a welding gun 29, a welding pipe 28 is arranged between the welding box 27 and the welding gun 29, the welding pipe 28 is made of flexible materials, the outer walls of two sides of the welding gun 29 are respectively provided with a limiting block 30, the outer wall of the limiting block 30 is provided with a transparent protective cover 13, the welding gun 29 is positioned inside the transparent protective cover 13, the outer wall of the transparent protective cover 13 is provided with an annular through hole 31, the inner wall of one side of the annular through hole 31 is provided with a through hole 32, the inner walls of two sides of the annular through hole 31 are respectively provided with a plurality of convex teeth 33, the adjacent two convex teeth 33 are in meshing distribution, the outer wall of the top of the annular through hole 31 is provided with an air bag 38, the outer wall of one side of the air bag 38 is provided with an air nozzle 39, the inner wall of the annular through hole 31 is clamped with a purification mechanism 34, when an automobile sheet metal is welded, a large amount of harmful gas can be generated, the harmful gas can be absorbed into the annular through the suction force generated when the air bag 38 inhales, thereby carry out purification treatment to harmful gas through purification mechanism 34, simultaneously, dogtooth 33 is the meshing distribution in the inside of annular opening 31, can make harmful gas be the wave flow in the inside of annular opening 31, so that make harmful gas distribute in the inside of annular opening 31, wherein the nitrogen oxide that contains among the harmful gas is reddish brown gas, therefore, reddish brown gas distributes in the inside of transparent protection casing 13, thereby can effectually prevent the burn that electric arc caused the staff through the cooperation between reddish brown gas and the transparent protection casing 13, in addition, after the welding is accomplished, the inside discharge of annular opening 31 can be followed to the nitrogen oxide.

In the invention, the purifying mechanism 34 is composed of a shell and a filter screen 37, the shell is connected with the filter screen 37 through bolts, the position of the inner wall of the shell close to the bottom is connected with the inverted beard 35 through bolts, the inverted beard 35 is made of flexible materials, and the inverted beard 35 is spread through the flowing of gas, so that the flowing speed of the gas is reduced, and the interference of the external gas entering the annular through hole 31 to the purification of the gas can be prevented.

The inner wall of casing rotates and is connected with rotating turret 36, and rotating turret 36 comprises bull stick and blade, and the blade is irregular distribution at the outer wall of bull stick, can improve gaseous mobility to accelerate gaseous flow, the irregular distribution of blade can make rotating turret 36 pivoted frequency accelerate.

The outer wall of the top of the fixing plate 2 is connected with a fixing mechanism 3 through bolts, the fixing mechanism 3 comprises a fixing frame 14 and a protection plate 22, fixing holes are formed in the outer walls of two sides of the fixing frame 14, fixing rods 16 are connected to the inner walls of the two fixing holes in a sliding mode, clamping blocks 15 are connected to the outer wall of one side of each fixing rod 16 through bolts, connecting frames 18 are connected to the outer walls of two sides of the fixing frame 14 through bolts, connecting plates 17 are connected to the outer walls of the connecting frames 18 in a rotating mode, fixing openings are formed in the positions, close to the top, of the outer walls of two sides of the fixing frame 14, push rods 20 are connected to the inner walls of the two fixing openings in a sliding mode, supporting blocks 19 are connected to the outer wall of one side of each push rod 20 through bolts, telescopic rods 21 are connected between the fixing frame 14 and the protection plate 22 through bolts, clamping plates 23 are connected to the outer wall of one side of the protection plate 22 through bolts, when automobile metal plates need to be welded, the automobile metal plates are placed inside the fixing frame 14, when the car panel beating was located between two splint 23, gravity through car panel beating self makes the car panel beating downstream, the clamp splice 15 to panel beating both sides bottom extrudees, make clamp splice 15 drive dead lever 16 and move to one side, make the one end of dead lever 16 with connecting plate 17 jack-up, thereby make the opposite side of connecting plate 17 take place the skew and contact with push rod 20 through lever principle, thereby it moves to drive guard plate 22 through push rod 20, and then it is fixed to the equal centre gripping in both sides top of car panel beating through splint 23, can improve the clamping effect of splint 23 to the car panel beating.

The outer wall of two dead levers 16 all cup joints spring 24, and when the welding was accomplished, when taking out the car panel beating from fixed establishment 3, can drive clamp splice 15 through spring 24 and reset.

The inner wall of one side of two splint 23 all has stripper plate 40 through bolted connection, and stripper plate 40 is the rubber material, and one side outer wall of stripper plate 40 is provided with a plurality of beads 41, and the shape of splint 23 is the h type, can improve the fixed effect of splint 23 to the car panel beating through the pressure of stripper plate 40, and the effort that produces when can preventing the welding simultaneously through bead 41 makes the car panel beating follow splint 23 and slide.

The circumference inner wall of ring channel 4 has the electro-magnet 26 that the annular array distributes through bolted connection, and the both sides of the circumference outer wall of slider 5 all are fixed with the locating piece, the locating piece adopts magnetic material to make and forms, when needs rotate slider 5 and top mechanism, the circuit of disconnection electro-magnet 26, there is not magnetic attraction between electro-magnet 26 and the locating piece, the outer wall of slider 5 can not receive magnetic attraction promptly, can be convenient for the staff to promote slider 5 and rotate along the bottom of ring channel 4 and circumference inner wall, so that rotary equipment, when need not rotate slider 5, the circuit of switching on two electro-magnets 26 of corresponding position, and make the electro-magnet 26 of circular telegram and produce the adsorption affinity and make slider 5 keep fixed between the magnetic material locating piece that stops at the corresponding position.

The top inner wall of the support frame 7 is connected with a guide rail 9 through a bolt, and the guide rail 9 and the thread block 10 form sliding connection.

The working principle is as follows: when the automobile metal plate fixing device is used, when the automobile metal plate needs to be welded, the automobile metal plate needing to be welded is placed in the fixing frame 14, when the automobile metal plate is located between the two clamping plates 23, the automobile metal plate moves downwards through the gravity of the automobile metal plate, so that the clamping blocks 15 at the bottoms of the two sides of the metal plate are extruded, the clamping blocks 15 drive the fixing rods 16 to move towards one side, one ends of the fixing rods 16 jack up the connecting plates 17, the other sides of the connecting plates 17 are deviated to be in contact with the push rods 20 through the lever principle, the protective plates 22 are driven to move through the push rods 20, the two sides of the automobile metal plate are clamped and fixed through the clamping plates 23, the clamping effect of the clamping plates on the automobile metal plate can be improved through the h-shaped clamping plates 23, the extrusion plates 40 and the convex ribs 41, after the fixing is completed, the circuit of the electromagnet 26 is disconnected, and the sliding block 5 can slide in the annular groove 4, thereby the support rod 6 drives the support frame 7 to rotate so as to rotate the welding mechanism 11, the friction force between the slide block 5 and the annular groove 4 can be reduced through the ball 25, the influence on the sliding of the slide block 5 due to the larger friction force is prevented, after the slide block slides to a corresponding position, the power supply of the electromagnet 26 at the position corresponding to the positioning block on the outer wall of the slide block 5 which stops rotating is switched on, magnetic attraction is generated between the electromagnet 26 at the corresponding position and the positioning block, the slide block 5 can be fixed according to the requirement through the magnetic attraction force of the electromagnet 26 and the electromagnet 26 which is distributed in an annular shape so as to weld the automobile and the metal plate, the rotary disc 8 is rotated, the rotary disc 8 can drive the threaded rod 12 to rotate, the welding mechanism 11 is driven to move through the threaded block 10, the position of the welding mechanism 11 is finely adjusted, the moving position of the welding mechanism 11 can be positioned through the guide rail 9, thereby carry out welding process to the car panel beating through welding mechanism 11, when welding the car panel beating, can produce a large amount of harmful gas, the suction that produces when breathing in through gasbag 38 absorbs harmful gas to the inside of annular opening 31, thereby carry out purification treatment to harmful gas through purification mechanism 34, and simultaneously, dogtooth 33 is the meshing distribution in the inside of annular opening 31, can make harmful gas be the wave and flow in the inside of annular opening 31, so that make harmful gas distribute in the inside of annular opening, the nitrogen oxide that wherein contains among the harmful gas is reddish brown gas, thereby can effectually prevent the electric arc to the staff that the staff caused through the cooperation between reddish brown gas and the transparent protection casing 13, can play the absorbing effect of buffering burning through blotter 42 and channel-section steel slide rail to the work of equipment.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.