CN113521905B - Integration welding is air inlet unit for exhaust-gas treatment - Google Patents
Integration welding is air inlet unit for exhaust-gas treatment Download PDFInfo
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- CN113521905B CN113521905B CN202110827635.9A CN202110827635A CN113521905B CN 113521905 B CN113521905 B CN 113521905B CN 202110827635 A CN202110827635 A CN 202110827635A CN 113521905 B CN113521905 B CN 113521905B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
Abstract
The invention belongs to the technical field of waste gas treatment, and particularly relates to an air inlet device for integrated welding waste gas treatment, aiming at the problem that in the prior art, pollutants are wasted time and labor when dust in flue gas is removed, the air inlet device comprises a waste gas treatment box with a cylindrical cavity, wherein a bearing mounting hole is formed in the middle of the inner wall of the bottom of the waste gas treatment box, a sealing bearing is clamped in the bearing mounting hole, a straight pipe is inserted in the sealing bearing, a spiral exhaust pipe is fixed at the top end of the straight pipe, air outlet holes distributed at equal intervals are formed in the inner side of the spiral exhaust pipe, an exhaust pipe is inserted at the top end of the waste gas treatment box, a valve is arranged in the middle of the exhaust pipe, and a support column is fixed at the top end of a rotating sleeve close to the circumferential edge. The invention can drive the rotating sleeve and the rubber brush rod attached to the inner wall of the spiral exhaust pipe to brush continuously by matching with the rotating water flow, thereby timely removing the dust possibly blocked at the air outlet.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to an air inlet device for integrated welding waste gas treatment.
Background
Welding waste gas contains dust, CO, O3 and NO2, is one of the most common waste gases in organic waste gas, and the smoke of the welding waste gas is harmful and toxic. Welding fume and welding fume are mainly removed in the welding waste gas treatment, the welding waste gas contains more dust which causes the greatest environmental pollution, and the treatment difficulty is high in the early treatment and the filter screen or the filtrate needs to be replaced frequently.
A novel environmental protection welding flue gas processing apparatus that chinese patent number is CN202020470060.0 discloses through retrieval belongs to environmental protection equipment technical field, including the universal wheel, universal wheel top end fixedly connected with carries the thing board, carry thing board upper surface and placed waste liquid collecting box, the liquid outlet has been seted up on waste liquid collecting box right side, waste liquid collecting box upper end fixedly connected with flue gas treatment case, waste liquid collecting box upper end is inlayed and is connected with catheter and extends to the inside bottom of flue gas treatment case, control panel is installed to flue gas treatment case right side wall.
However, the flue gas treatment device directly sends the flue gas into the waste gas treatment device through the exhaust fan for multi-stage gas treatment, but the method increases the process and the later treatment difficulty of gas treatment, and dust in the flue gas can be removed as much as possible when the gas enters; therefore, there is a need for an air inlet device that can remove dust from flue gas in the air inlet section.
Disclosure of Invention
The invention provides an air inlet device for integrated welding waste gas treatment, aiming at solving the problems that time and labor are wasted when pollutants are removed when dust in flue gas is removed in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: an air inlet device for integrated welding waste gas treatment comprises a waste gas treatment box with a cylindrical structure, wherein a cavity is arranged in the waste gas treatment box, a bearing mounting hole is formed in the middle of the inner wall of the bottom of the waste gas treatment box, a sealing bearing is clamped in the bearing mounting hole, a straight pipe is inserted in the sealing bearing, a spiral exhaust pipe is fixed at the top end of the straight pipe, air outlet holes distributed at equal intervals are formed in the inner side of the spiral exhaust pipe, an exhaust pipe is inserted in the top end of the waste gas treatment box, a valve is arranged in the middle of the exhaust pipe, a vertical supporting column is fixed at the top end of the straight pipe, a supporting plate retaining ring is fixed close to the middle of the supporting column, the outer circumferential wall of the supporting plate retaining ring is rotatably connected with a rotating sleeve, a supporting column is fixed at the position, close to the circumferential edge, a telescopic ejector rod is fixed at the top end of the supporting column, and a vertically placed rubber brush rod is fixed at the end of the telescopic ejector rod, one side that the rubber brush-holder stud is close to the venthole is provided with the brush hair of hugging closely with the venthole, the top of rotating the cover is close to one side that the support column was kept away from to circumference edge and is fixed with the design knee, and the top of design knee is provided with the drag flap, consequently when using, with the height and the angular adjustment to spiral exhaust pipe's top outlet end position of drag flap earlier, the rotatory rivers of cooperation can drive the brush that rotates the cover and paste the rubber brush-holder stud that is not stopped at the spiral exhaust pipe inner wall and wipe, and then in time clear away the dust that probably blockked up in venthole department.
According to the preferable scheme, the upper surface of the retaining ring of the supporting plate is provided with ball grooves distributed equidistantly near the circumferential edge, the ball grooves are connected with balls distributed equidistantly in a clamping mode, the top end of the inner wall of the rotating sleeve, which is close to the balls, is provided with a limiting groove matched with the inner wall of the rotating sleeve, so that the rotating sleeve can be prevented from derailing when being sleeved on the outer wall of the retaining ring of the supporting plate to rotate continuously, and the rotating sleeve can rotate horizontally and stably all the time.
As the preferable scheme in the invention, the telescopic ejector rod comprises an outer barrel with an opening facing the rubber brush rod, an inner slide rod connected in the outer barrel in a sliding manner, and a compression spring between the inner slide rod and the barrel bottom of the outer barrel, so that the rubber brush rod can tightly abut against the inner wall of the spiral exhaust pipe on one side provided with the air outlet.
According to the preferable scheme, the rubber brush rod is fixed with the sponge layer on one side away from the telescopic ejector rod, and the bristles are fixed on the surface of the sponge layer, so that the contact area between the sponge layer or the bristles and the surface of the spiral exhaust pipe can be increased when the brush is used, and the cleaning effect is improved.
As a preferable scheme in the invention, a ball bearing seat is fixed at the top end of the shaping bent rod, a ball groove is formed in the side surface of the ball bearing seat, a second ball is clamped in the ball groove, a screw hole is formed in the surface of the second ball, and a stud matched with the screw hole is fixed on the back surface of the resistance plate.
According to the invention, the arc-shaped groove is formed in one side, far away from the ball bearing seat, of the resistance plate, so that when the water resistance device is used, the height and the inclination angle of the resistance plate can be adjusted by matching the qualitative bent rod with the ball bearing seat, and the resistance of the same area to water can be increased by matching the arc-shaped groove formed in the front surface of the resistance plate.
As a preferable scheme in the invention, a tapered tooth surface is reserved on the circumferential outer wall of the rotating sleeve close to the bottom end, a rotating rod fixing seat is fixed on the inner wall of the waste gas treatment tank at the same height position of the tapered tooth surface, a transmission rod is rotatably connected in the middle of the rotating rod fixing seat, the axial lead of the transmission rod extends to the circle center of the section circle of the waste gas treatment tank, a driving motor is fixed on the end part of the outer wall of the waste gas treatment tank close to the transmission rod, and a tapered gear meshed with the tapered tooth surface is fixed on the end part of the transmission rod, so that when the anti-blocking mechanism formed by a device at the top end of the rotating sleeve cannot be driven to rotate due to insufficient air flow speed, the anti-blocking mechanism can be driven to operate only by starting the driving motor.
As a preferable scheme in the invention, the inner wall of the straight pipe is clamped with the check valve near the top end, the check valve comprises an outer pipe clamped on the inner wall of the straight pipe, an annular retainer ring welded on the inner wall of the top end of the outer pipe, a spring baffle plate on the inner wall of the outer pipe near the bottom end, a tension spring on the top end of the spring baffle plate and a T-shaped cover plate on the top end of the tension spring, the top end of the annular retainer ring is provided with a sealing groove, and a sealing ring is clamped in the sealing groove, so that when the flow rate of sprayed gas is low, the gas passing through the check valve can only run from the bottom right to the top, and the backflow of purified water is avoided.
According to the preferable scheme, the top end of the waste gas treatment box is clamped with the plug board box with the downward opening in a cuboid box-shaped structure, the front face of the plug board box is provided with the strip-shaped hole, the plug board frame is inserted in the strip-shaped hole, and the filter screen is clamped in the plug board frame, so that when the waste gas treatment box is used, the filter screen can also block dust if purified water in the waste gas treatment box is not used for replacement under the unexpected condition.
To sum up, the beneficial effect in this scheme is:
1. this air inlet unit is used in integration welding exhaust-gas treatment, rotate the rubber brush-holder stud of connection hugging closely with it at the spiral exhaust pipe inner wall through the setting, the cooperation rotates the resistance plate that the upper surface is close to the design knee of edge and its top, thereby can be when using, height and the angular adjustment of resistance plate to spiral exhaust pipe's top outlet end position earlier, the rotatory rivers of cooperation can drive the brush that rotates the cover and paste the rubber brush-holder stud that the spiral exhaust pipe inner wall does not stop and wipe, and then in time clear away the dust that outlet port department probably blockked up.
Drawings
FIG. 1 is a schematic cross-sectional view of an air inlet device for integrated welding exhaust gas treatment according to the present invention;
FIG. 2 is a schematic perspective view of an anti-blocking mechanism of an air inlet device for integrated welding exhaust gas treatment according to the present invention;
FIG. 3 is a schematic view of an assembly structure of a resistance plate of an integrated welding exhaust gas treatment intake device according to the present invention;
FIG. 4 is an enlarged schematic structural view of a gas inlet device for integrated welding waste gas treatment shown in FIG. 1 at B;
fig. 5 is a schematic cross-sectional structural view of an air inlet device for integrated welding exhaust gas treatment according to a second embodiment of the present invention;
FIG. 6 is an enlarged schematic view of a portion A of FIG. 5 of the gas inlet apparatus for integrated welding exhaust gas treatment according to the present invention;
FIG. 7 is an enlarged schematic structural view of three types of inlet device plug boxes for integrated welding exhaust gas treatment according to embodiments of the present invention;
fig. 8 is a schematic overall structure diagram of an air inlet device plug board box for integrated welding exhaust gas treatment according to the present invention.
In the figure: 1 waste gas treatment box, 2 balls I, 3 supporting columns, 4 sealing bearings, 5 supporting baffle rings, 6 rotating sleeves, 7 resistance plates, 8 shaping bent rods, 9 air outlet holes, 10 telescopic ejector rods, 11 inner sliding rods, 12 spiral exhaust pipes, 1201 straight pipes, 13 brush hairs, 14 rubber brush rods, 15 plugboard boxes, 1501 jacks, 1502 strip-shaped holes, 16 plugboard frames, 1601 sealing strips, 1602 filter screens, 17 valves, 18 exhaust pipes, 19 check valves, 20 conical gears, 21 conical tooth surfaces, 22 transmission rods, 23 rotating rod fixing seats, 24 driving motors, 25 spring baffles, 26 sealing rings, 27T-shaped cover plates, 28 annular check rings, 29 tension spring springs, 30 anti-blocking covers, 31 ball bearing blocks, 32 arc-shaped grooves, 33 supporting columns, 34 spherical grooves and 35 balls II.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-4, an air inlet device for integrated welding waste gas treatment comprises a waste gas treatment box 1 with a cylindrical cavity, wherein purified water is filled in the waste gas treatment box 1, and chemical agents for removing sulfur and phosphorus can be added into the waste gas treatment box 1, mainly for removing dust; the middle part of the inner wall of the bottom of the waste gas treatment box 1 is provided with a bearing mounting hole, a sealing bearing 4 is clamped in the bearing mounting hole, a straight pipe 1201 is inserted in the sealing bearing 4, a spiral exhaust pipe 12 is fixed at the top end of the straight pipe 1201, the position of the straight pipe 1201 must be positioned at the position of the coincidence of the axial lead of the spiral exhaust pipe 12, so that the distance from a rotating device arranged at the top end of the straight pipe to the inner wall of the spiral exhaust pipe 12 in the later period is equal everywhere when the rotating device rotates, the inner side of the spiral exhaust pipe 12 is provided with air outlet holes 9 distributed at equal intervals, the top end of the waste gas treatment box 1 is inserted with an exhaust pipe 18, a valve 17 is arranged in the middle of the exhaust pipe 18, a vertical support column 3 is fixed at the top end of the straight pipe 1201, a support plate baffle ring 5 is fixed at the position, close to the middle part, the circumferential outer wall of the support plate baffle ring 5 is rotatably connected with a rotating sleeve 6, and a support column 33 is fixed at the position, close to the circumferential edge, of the top end of the rotating sleeve 6, the top of support column 33 is fixed with flexible ejector pin 10, the end fixing of flexible ejector pin 10 has vertical rubber brush-holder stud 14 of placing, one side that rubber brush-holder stud 14 is close to venthole 9 is provided with the brush hair 13 of hugging closely with venthole 9, the top of rotating sleeve 6 is close to one side that support column 3 was kept away from to circumference edge and is fixed with design knee 8, and the top of design knee 8 is provided with drag flap 7, consequently when using, with the height and the angle adjustment of drag flap to the top gas outlet position of spiral exhaust pipe 12 earlier, the rotatory rivers of cooperation can drive the brush that rotates sleeve 6 and paste rubber brush-holder stud 14 at spiral exhaust pipe 12 inner wall and wipe ceaselessly, and then in time clear away the dust that probably blockked up in venthole department.
According to the invention, the upper surface of the retaining ring 5 of the supporting plate is provided with ball grooves distributed equidistantly near the circumferential edge, the ball grooves are clamped with balls 2 distributed equidistantly, the number of the balls 2 is enough, and the balls are preferably densely distributed in the ball grooves, so that the rotating sleeve is ensured not to incline, the friction resistance is reduced, and the top end of the inner wall of the rotating sleeve 6 near the balls is provided with a limit groove matched with the balls, so that the rotating sleeve 6 is ensured not to derail when being sleeved on the outer wall of the retaining ring 5 of the supporting plate to continuously rotate, and is always kept to horizontally and stably rotate.
The telescopic ejector rod 10 comprises an outer barrel with an opening facing the rubber brush rod 14, an inner slide rod 11 connected in the outer barrel in a sliding manner, and a compression spring between the inner slide rod 11 and the bottom of the outer barrel, and the rubber brush rod 14 can tightly abut against the inner wall of the spiral exhaust pipe 12 on one side provided with the air outlet hole 9.
Wherein, one side that flexible ejector pin 10 was kept away from to rubber brush pole 14 is fixed with the sponge layer, the thickness on sponge layer is decided according to the diameter of spiral exhaust pipe 12, at least will reach the radial half of spiral exhaust pipe 12, thereby can ensure that the sponge layer covers all ventholes 9 as far as when the brush is wiped and use, brush hair 13 is fixed on the surface on sponge layer, thereby can increase the area of contact on sponge layer or brush hair 13 and spiral exhaust pipe 12 surface when using, improve the clearance effect.
Wherein, the top of design knee 8 is fixed with ball bearing frame 31, open the side of ball bearing frame 31 has spherical groove 34, spherical groove 34 inside the joint has two 35 of ball, be provided with the brake block of increase friction between the outer wall of two 35 of ball and the spherical groove 34 inner wall, play the effect of design, and open on the surface of two 35 of ball has the screw, the back of resistance plate 7 is fixed with the double-screw bolt with screw looks adaptation, open the outer wall of exhaust-gas treatment case 1 has the observation window, open the bottom of exhaust-gas treatment case 1 has waste water discharge mechanism, the bottom of exhaust-gas treatment case 1 is close to near waste water discharge mechanism and sets up to sunken column structure, thereby can be when using, can collect waste water automatically and can concentrate heavy mud temporarily.
Wherein, the arc wall 32 has been opened to one side of keeping away from ball bearing seat 31 of resistance board 7 to can be when using, can adjust the height and the inclination of resistance board 7 through qualitative knee 8 cooperation ball bearing seat 31, the arc wall that the cooperation resistance board 7 openly was seted up can increase the resistance of equal area to water.
The working principle is as follows: when the spiral exhaust pipe 12 sprays a large amount of high-speed high-pressure gas in use, one part of the gas can be separated from the gas outlet holes 9 on the inner wall of the spiral exhaust pipe 12, and then the gas acts on the purified water, so that the contact area of the gas and the purified water is increased, and the dust removal effect is improved; secondly, a part of gas is sprayed out from the top end, and can drive water flow to flow in a vortex shape, so as to drive an anti-blocking mechanism which is rotatably connected to the outer wall of the retaining ring 5 of the supporting plate to rotate; thereby timely removing the dust possibly blocked at the air outlet.
Example 2
Referring to fig. 5-6, an air inlet device for integrated welding waste gas treatment, in this embodiment, compared with embodiment 1, further includes a tapered tooth surface 21 reserved on the circumferential outer wall of the rotating sleeve 6 near the bottom end, a rotating rod fixing seat 23 fixed on the inner wall of the waste gas treatment tank 1 at the same height position as the tapered tooth surface 21, a transmission rod 22 rotatably connected in the middle of the rotating rod fixing seat 23, and the axial lead of the transmission rod 22 extends to the center of the section circle of the waste gas treatment box 1, the end part of the outer wall of the waste gas treatment box 1 close to the transmission rod 22 is fixed with a driving motor 24, and the end of the transmission rod 22 is fixed with a bevel gear 20 which is intermeshed with the tapered tooth face 21, therefore, when the anti-blocking mechanism formed by the device at the top end of the rotating sleeve 6 cannot be driven to rotate by insufficient speed of the sprayed air flow, the anti-blocking mechanism can be driven to operate only by starting the driving motor 24.
Wherein, the inner wall of straight tube 1201 is close to the top joint and has check valve 19, check valve 19 includes the outer tube of joint at the straight tube 1201 inner wall, the welding is at the annular retaining ring 28 of outer tube top inner wall, the outer tube inner wall is close to the spring baffle 25 of bottom, the extension spring 29 on spring baffle 25 top and the T shape apron 27 on extension spring 29 top, the top of annular retaining ring 28 is opened has the seal groove, and the joint has sealing washer 26 in the seal groove, thereby can be when using, when the spun gas velocity of flow is slow, the operation that the gas through check valve 19 can only be right side down and up, avoid purifying the lower position of pouring into straight tube 1201 of water.
When the anti-blocking mechanism formed by the device at the top end of the rotating sleeve 6 cannot be driven to rotate by insufficient speed of the sprayed air flow, the anti-blocking mechanism can be driven to operate under the action of the transmission rod 22 and the bevel gear 20 only by starting the driving motor 24; when the flow rate of the sprayed gas is slow, the gas passing through the check valve 19 can only run from the right to the bottom to the top, so that the purified water is prevented from flowing backwards.
Example 3
Referring to fig. 1-3, an air inlet unit for integrated welding exhaust-gas treatment, this embodiment compares in embodiment 1, still includes that the top joint of exhaust-gas treatment case 1 has the downward picture peg box 15 that is cuboid box-shaped structure of opening, and the front of picture peg box 15 is opened there is the bar hole 1502, and the picture peg frame 16 has been pegged graft in the bar hole 1502, has the filter screen 1602 in the picture peg frame 16 to can be when using, if the purification water in the exhaust-gas treatment case 1 used up under the unexpected circumstances not in time of changing, the filter screen 1602 can also block the dust.
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.
Claims (4)
1. An air inlet device for integrated welding waste gas treatment comprises a waste gas treatment box (1) with a cylindrical structure, wherein a cavity is arranged in the waste gas treatment box, a bearing mounting hole is formed in the middle of the inner wall of the bottom of the waste gas treatment box (1), a sealing bearing (4) is clamped in the bearing mounting hole, a straight pipe (1201) is inserted in the sealing bearing (4), a spiral exhaust pipe (12) is fixed to the top end of the straight pipe (1201), air outlet holes (9) distributed at equal intervals are formed in the inner side of the spiral exhaust pipe (12), an exhaust pipe (18) is inserted in the top end of the waste gas treatment box (1), a valve (17) is arranged in the middle of the exhaust pipe (18), and the air inlet device is characterized in that a vertical supporting column (3) is fixed to the top end of the straight pipe (1201), a supporting plate blocking ring (5) is fixed to the position, close to the middle of the circumferential outer wall of the supporting column (3), and a rotating sleeve (6) is rotatably connected to the circumferential outer wall of the supporting plate blocking ring (5), a supporting column (33) is fixed at the top end of the rotating sleeve (6) close to the circumferential edge, a telescopic ejector rod (10) is fixed at the top end of the supporting column (33), a vertically-placed rubber brush rod (14) is fixed at the end part of the telescopic ejector rod (10), bristles (13) tightly attached to the air outlet hole (9) are arranged on one side, close to the air outlet hole (9), of the rubber brush rod (14), a shaping bent rod (8) is fixed at one side, close to the circumferential edge, of the top end of the rotating sleeve (6) far away from the supporting column (3), and a resistance plate (7) is arranged at the top end of the shaping bent rod (8);
the upper surface of the supporting plate baffle ring (5) close to the circumferential edge is provided with ball grooves distributed at equal intervals, balls (2) distributed at equal intervals are clamped in the ball grooves, and the inner wall of the rotating sleeve (6) close to the top ends of the balls is provided with a limit groove matched with the inner wall;
the telescopic ejector rod (10) comprises an outer barrel with an opening facing the rubber brush rod (14), an inner sliding rod (11) connected in the outer barrel in a sliding manner, and a compression spring between the inner sliding rod (11) and the barrel bottom of the outer barrel;
a sponge layer is fixed on one side of the rubber brush rod (14) far away from the telescopic ejector rod (10), and the bristles (13) are fixed on the surface of the sponge layer;
a ball bearing seat (31) is fixed at the top end of the shaping bent rod (8), a spherical groove (34) is formed in the side face of the ball bearing seat (31), a second ball (35) is clamped in the spherical groove (34), a screw hole is formed in the surface of the second ball (35), and a stud matched with the screw hole is fixed on the back face of the resistance plate (7);
an arc-shaped groove (32) is formed in one side, far away from the ball bearing seat (31), of the resistance plate (7).
2. The integrated welding exhaust gas treatment air inlet device according to claim 1, characterized in that a tapered tooth surface (21) is reserved on the outer wall of the circumference of the rotating sleeve (6) close to the bottom end, a rotating rod fixing seat (23) is fixed on the inner wall of the exhaust gas treatment box (1) at the same height position of the tapered tooth surface (21), a transmission rod (22) is connected to the middle of the rotating rod fixing seat (23) in a rotating mode, the axial lead of the transmission rod (22) extends to the center of the cross-section circle of the exhaust gas treatment box (1), a driving motor (24) is fixed on the end portion, close to the transmission rod (22), of the outer wall of the exhaust gas treatment box (1), and a bevel gear (20) meshed with the tapered tooth surface (21) is fixed on the end portion of the transmission rod (22).
3. The integrated welding exhaust-gas treatment air inlet device according to claim 1, characterized in that a check valve (19) is clamped on the inner wall of the straight pipe (1201) near the top end, the check valve (19) comprises an outer pipe clamped on the inner wall of the straight pipe (1201), an annular retainer ring (28) welded on the inner wall of the top end of the outer pipe, a spring baffle (25) on the inner wall of the outer pipe near the bottom end, a tension spring (29) on the top end of the spring baffle (25), and a T-shaped cover plate (27) on the top end of the tension spring (29), a sealing groove is formed in the top end of the annular retainer ring (28), and a sealing ring (26) is clamped in the sealing groove.
4. The integrated welding exhaust-gas treatment air inlet device according to claim 1, characterized in that a plug-in board box (15) with a downward opening and a cuboid box-shaped structure is clamped at the top end of the exhaust-gas treatment box (1), a strip-shaped hole (1502) is formed in the plug-in board box (15), a plug-in board frame (16) is inserted in the strip-shaped hole (1502), and a filter screen (1602) is clamped in the plug-in board frame (16).
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| CN202110827635.9A CN113521905B (en) | 2021-07-21 | 2021-07-21 | Integration welding is air inlet unit for exhaust-gas treatment |
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| CN202110827635.9A CN113521905B (en) | 2021-07-21 | 2021-07-21 | Integration welding is air inlet unit for exhaust-gas treatment |
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