Lifting type top suction environmental protection smoke exhaust beam for zinc pot cover

Abstract

The application discloses a lifting type top suction environment-friendly smoke exhaust beam for a zinc pot cover and belongs to the technical field of metal material plating production line devices, which comprises a beam body, the beam body comprises a beam pipe, the beam pipe is connected with an elastic cloth arrangement mechanism and a cloth winding mechanism, the beam body is provided with a lifting part at both ends, the beam body is provided with an air outlet, the beam pipe is provided with an air inlet, and the air inlet and the air outlet are communicated. Through the arrangement of the beam body, the beam body can be lifted to the side above a zinc-plated workpiece, the zinc smoke overflowing above the zinc pot can be treated through the air inlet, and the zinc smoke overflowing quickly along the wall of the long pipe workpiece can be particularly treated conveniently.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of metal material plating production line device, and particularly relates to a lifting type top suction environment-friendly smoke exhaust beam for zinc pot cover. BACKGROUND

[0002] At present, in the hot galvanizing production line of a production enterprise, a crane in a hot galvanizing workshop is usually used to hoist a workpiece, and the workpiece to be subjected to hot galvanizing treatment is placed into a zinc pot for hot galvanizing operation. Hot galvanizing usually includes the operations of feeding, workpiece galvanizing, cooling, passivation and the like. In the process of hot galvanizing, the crane suspends the workpiece to be galvanized and lowers it, the workpiece contacts zinc liquid to generate zinc smoke, and the zinc smoke is harmful to the human body. In order to handle the zinc smoke in the operation site, some related hot galvanizing production lines are provided with a zinc smoke collection port arranged at the side of the zinc pot along the pot, and a high-temperature-resistant cloth is wrapped outside the zinc pot to form a fence for preventing zinc smoke from overflowing, thereby forming a side suction dust removal operation mode. However, the inventor considers that when a long pipe is subjected to hot galvanizing, the zinc smoke will flow upward along the wall of the long pipe, and especially the pipe cavity of the long pipe will also have a flow guiding effect on the high-temperature zinc smoke. Obviously, the side suction dust removal mode can only complete the smoke exhaust by exhausting the zinc smoke for a long time and diluting the zinc smoke by air convection, and is not suitable for the smoke exhaust of long pipe workpieces. Therefore, it is necessary to design a lifting type top suction environment-friendly smoke exhaust beam for zinc pot cover.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information which does not constitute the prior art. SUMMARY

[0004] The inventor finds through research that, due to the influence of the structure of the long pipe, the pipe cavity of the long pipe will have a flow guiding effect on the high-temperature zinc smoke, so that the zinc smoke quickly overflows along the wall of the long pipe, and the side suction dust removal mode cannot quickly handle the overflown zinc smoke.

[0005] In view of at least one of the above technical problems, the present disclosure provides a lifting type top suction environment-friendly smoke exhaust beam for zinc pot cover, and the specific technical solutions are as follows:

[0006] A lifting type top suction environment-friendly smoke exhaust beam for zinc pot cover, comprising a beam body, the beam body comprising a beam pipe, a telescopic cloth mechanism being connected to the upper part of the beam pipe, a cloth winding mechanism being connected to the lower part of the beam pipe, hoisting parts being arranged at both ends of the beam body, an air outlet being arranged on one side of the beam body, a plurality of air suction ports being arranged on the inner side wall of the beam pipe, and the air suction ports being in communication with the air outlet.

[0007] In some embodiments of the present disclosure, flange connection plates are arranged on the end faces of both ends of the beam pipe, a reinforcing frame is arranged on the pipe body of the beam pipe, an air outlet pipe is arranged in the air outlet, flange connection plates are also arranged on the outer end faces of the air outlet pipe, a flow guide plate is arranged on the wall of the air outlet pipe and extends into the inner cavity of the beam pipe, and the flow guide plate faces the air suction ports.

[0008] In some embodiments of the present disclosure, the cross section of the beam pipe is a trapezoid, the suction port is arranged on the inclined side of the trapezoid, and the reinforcing frame comprises angle irons arranged at the edges of the trapezoid for support.

[0009] In some embodiments of the present disclosure, the wall of the beam pipe is made of a thin plate, the beam pipe is provided with a motor fixing frame for fixing the stretchable cloth motor, and the outer wall of the beam pipe is provided with a wiring channel.

[0010] In some embodiments of the present disclosure, the stretchable cloth mechanism comprises two stretchable cloth spools arranged coaxially and parallel to the beam pipe, the stretchable cloth spools are fixed with high-temperature-resistant cloth, the high-temperature-resistant cloth is wound on the stretchable cloth spool, the other end of the high-temperature-resistant cloth is provided with a fabric bottom rod, an elastic support arm is arranged between the stretchable cloth spool and the fabric bottom rod, and the two stretchable cloth spools are rotated circumferentially through the stretchable cloth motor.

[0011] In some embodiments of the present disclosure, the stretchable cloth mechanism comprises two oppositely arranged stretchable frames, the stretchable frames comprise two assembly seats fixed to the outer wall of the beam pipe, the inner sides of the two assembly seats are arranged with stretchable cloth spools, the elastic support arm is an elastic support articulated arm, and the two ends of the elastic support articulated arm are respectively articulated to the stretchable cloth spool and the fabric bottom rod.

[0012] In some embodiments of the present disclosure, the stretchable cloth motor is provided with a driving wheel, the driving wheel is connected with a driven wheel, the middle part of the driven wheel is provided with a shaft coupling, and the two ends of the shaft coupling are respectively connected with one stretchable cloth spool; the shaft of the driving wheel is provided with an encoder.

[0013] In some embodiments of the present disclosure, the wall of the beam pipe is provided with a plurality of dust removal channels, and the dust removal channels are provided with detachable closure covers.

[0014] In some embodiments of the present disclosure, the suction port close to the air outlet has a smaller diameter than the suction port far from the air outlet.

[0015] In some embodiments of the present disclosure, the hoisting part is a transmission chain lifting lug, and the two ends of the beam body are provided with vertical guide mechanisms.

[0016] In some embodiments of the present disclosure, the cloth winding mechanism comprises a cloth winding motor and a cloth, the cloth winding motor is connected with a cloth winding shaft, a plurality of bearing seats connected with the beam body are uniformly arranged on the cloth winding shaft, a back strap wheel is arranged on one side of the bearing seat, and a cloth winding belt matched with the back strap wheel is arranged on the cloth.

[0017] In some embodiments of the present disclosure, the cloth winding motor is connected with the cloth winding shaft through a speed reducer, and the lower part of the cloth is provided with a counterweight or is detachably connected to the ground.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] By the arrangement of the beam body, the beam body can be lifted to the side of the zinc-plated piece, the zinc fume overflowing above the zinc pot is treated through the air suction port, especially suitable for the zinc fume overflowing quickly along the pipe wall of the long pipe piece, convenient to use, and provides a new idea for the quick discharge of the zinc fume above the zinc pot when the long pipe piece is galvanized.

[0020] The lifting type beam body design is flexible and controllable in height during use, and facilitates the suspension of the hot galvanizing workpiece in and out. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective view of the embodiment 1 in the structure of the application from the perspective of A;

[0022] Figure 2 It is a perspective view of the embodiment 1 in the structure of the application from the perspective of B; Figure 1 It is a partial enlarged view of part A in the embodiment 1 in the structure of the application;

[0023] Figure 3 It is a perspective view of the embodiment 1 in the structure of the application from the perspective of C; Figure 1 It is a partial enlarged view of part B in the embodiment 1 in the structure of the application;

[0024] Figure 4 It is a perspective view of the embodiment 1 in the structure of the application from the perspective of D;

[0025] Figure 5 It is a perspective view of the embodiment 1 in the structure of the application from the perspective of E; Figure 4 It is a partial enlarged view of part C in the embodiment 1 in the structure of the application;

[0026] Figure 6 It is a partial sectional view of the beam pipe in the embodiment 1 in the structure of the application;

[0027] Figure 7 It is a perspective view of the embodiment 1 in the structure of the application from the perspective of F;

[0028] Figure 8 It is a perspective view of the embodiment 1 in the structure of the application from the perspective of G; Figure 7 It is a partial enlarged view of part D in the embodiment 1 in the structure of the application;

[0029] Figure 9 It is a schematic view of the elastic supporting arm in the embodiment 1 in the structure of the application;

[0030] Explanation of reference numerals in the drawings: 1, beam body; 11, beam pipe; 111, air suction port; 112, motor fixing frame; 113, wiring channel; 114, closing cover plate; 12, flange connecting plate; 13, reinforcing frame; 131, angle iron; 14, air outlet pipeline; 141, guide plate; 15, vertical guide mechanism; 2, stretch cloth mechanism; 21, stretch cloth reel; 22, high-temperature-resistant cloth; 23, fabric bottom rod; 24, elastic support arm; 25, stretch cloth motor; 251, driving wheel; 26, assembly seat; 27, driven wheel; 28, encoder; 3, cloth winding mechanism; 31, cloth winding motor; 32, cloth winding; 321, cloth winding belt; 33, cloth winding shaft; 331, bearing seat; 332, back pulley; 4, hoisting part. DETAILED DESCRIPTION

[0031] In order to better understand the object, structure and function of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0032] The serial numbers of components in this paper are used only to distinguish the described objects, and do not have any sequence or technical meaning. In the present disclosure, "connection" includes direct and indirect "connection" unless otherwise specified. In the description of the present application, it should be understood that the orientation terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and brief description, and do not indicate or imply that the devices or units referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] As shown in the drawings Figures 1 to 9As shown, a lifting type top suction environmental protection smoke exhaust beam for zinc pot cover is designed, which comprises a beam body 1, the length of the beam body 1 is determined according to the length of the zinc pot, the both ends of the beam body 1 are sealed, the beam body 1 comprises a beam pipe 11, the beam pipe 11 has a hollow pipe cavity, the upper part of the beam pipe 11 is connected with a telescopic cloth mechanism 2, the lower part of the beam pipe 11 is connected with a cloth winding mechanism 3, the both ends of the beam body 1 are provided with lifting parts 4, the lifting type beam body 1 is designed through the lifting parts 4, the height of the beam body 1 is flexible and controllable during use, the hot galvanizing workpiece to be processed is conveniently hung in and out, one side of the beam body 1 is provided with an air outlet, the negative pressure system is connected through the air outlet, the negative pressure system is connected with the bag type dust collector through a pipeline, the inner side wall of the beam pipe 11 is provided with a plurality of air suction ports 111, the air suction ports 111 are through between the air outlet, through the setting of the beam body 1, the beam body 1 can be lifted to the side above the zinc workpiece to be plated, the zinc smoke overflowing above the zinc pot is treated through the air suction ports 111, and it is especially suitable for the zinc smoke overflowing quickly along the pipe wall of the long pipe workpiece, and it is convenient to use.

[0034] In the above embodiments, three examples are listed to realize the above technical scheme: Embodiment 1

[0035] As Figures 1 to 9As shown, the embodiment is disclosed a lifting type top suction environmental protection smoke exhaust beam for zinc pot cover, including beam body 1, according to the length of zinc pot, the length of beam body 1 is determined, the both ends of beam body 1 are sealed, the beam body 1 includes two beam pipes 11 connected, the beam pipe 11 has a hollow pipe cavity, the upper part of beam pipe 11 is connected with telescopic cloth mechanism 2, the lower part of beam pipe 11 is connected with cloth winding mechanism 3, the both ends of beam body 1 are provided with lifting parts 4, the lifting type beam body 1 design is realized through lifting parts 4, the height of beam body 1 is flexible and controllable during use, it is convenient for the hot galvanizing workpiece to be hung in and out, one side of beam body 1 is provided with air outlet, the air outlet is connected with negative pressure system, the negative pressure system is connected with bag dust collector through pipeline, the inner side wall of beam pipe 11 is provided with several air inlets 111, the air inlets 111 are through between the air outlet, through the setting of beam body 1, the beam body 1 can be lifted to the upper side of the zinc-plated workpiece, the zinc smoke overflowed on the top of zinc pot is treated through air inlet 111, it is especially suitable for the zinc smoke overflowed along the pipe wall of long pipe, convenient to use;Telescopic cloth mechanism 2 includes two telescopic cloth reels 21 coaxially arranged and parallel to beam pipe 11, the telescopic cloth reel 21 is fixed with high temperature resistant cloth 22, the high temperature resistant cloth 22 is galvanized fireproof cloth, the high temperature resistant cloth 22 is wound on the telescopic cloth reel 21, the other end of high temperature resistant cloth 22 is provided with fabric bottom rod 23, the telescopic cloth reel 21 and fabric bottom rod 23 are provided with elastic supporting arm 24, the two telescopic cloth reels 21 are realized circumferential rotation through the telescopic cloth motor 25, through the setting of telescopic cloth mechanism 2, the high temperature resistant cloth is pulled, the telescopic cloth motor 25 is reversed to realize the extension and retraction of elastic supporting arm 24, when the elastic supporting arm 24 is extended, the high temperature resistant cloth 22 can be stretched to shield on the top of zinc pot, reducing the overflow of zinc smoke, by adjusting the extension state of elastic telescopic arm 24, the shielding degree of zinc pot top is controlled;Cloth winding mechanism 3 includes cloth winding motor 31 and cloth winding 32, the cloth winding motor 31 is connected with cloth winding shaft 33, the cloth winding shaft 33 is evenly provided with several bearing seats 331 connected with beam body 1, the bearing seat 331 is provided with back strap wheel 332 on one side, the cloth winding 32 is provided with cloth winding belt 321 matched with back strap wheel 332, through the setting of cloth winding mechanism 3, the main function of cloth winding mechanism 3 is to realize the winding and unwinding of cloth winding 32, when the beam body 1 is lowered, the winding of cloth winding 32 does not occupy production space, it is convenient for the hot galvanizing workpiece to be hung in and out, when the beam body 1 is raised, the unwinding of cloth winding 32 can form a surrounding space to prevent the horizontal overflow of zinc smoke.

[0036] Wherein, the end face of the beam pipe 11 is provided with a flange connecting plate 12, which can be used to fix an end plate or connect with another beam pipe 11, the body of the beam pipe 11 is provided with a reinforcing frame 13, which can be an angle iron or a reinforcing sheet metal part, here the assembly surface of the cloth winding mechanism 3 can be welded with the reinforcing frame 13, so that the cloth winding motor 31 can bear the torque when rotating, the air outlet is provided with an air outlet pipeline 14, the outer end face of the air outlet pipeline 14 is also provided with a flange connecting plate 12, the wall of the air outlet pipeline 14 is provided with a guide plate 141 extending to the inner cavity of the beam pipe 11, the guide plate 141 faces the air inlet 111, the cross section of the beam pipe 11 is a similar right triangle, which includes a similar trapezoidal structure with a plane inclined surface, an outer convex arc surface, an inner concave arc surface or a broken line surface, the air inlet 111 is arranged on the inclined side of the similar right triangle, and the air inlet is a through hole, which can be in the shape of a waist type hole, the reinforcing frame 13 includes an angle iron 131 arranged at the edge of the similar right triangle for support; when the zinc pot is relatively long, considering the lifting purpose of the beam body 1, while ensuring the air suction amount, the weight of the beam pipe 11 is reduced, the wall of the beam pipe 11 is as thin as possible according to the stress analysis software, a thin plate for weight reduction is adopted, the thickness of the thin plate is 3mm, the beam pipe 11 is provided with a motor fixing frame 112 for fixing the telescopic cloth motor 25, in the embodiment, the motor fixing frame 112 is arranged above the beam pipe 11, the outer wall of the beam pipe 11 is provided with a wiring channel 113, which is a wiring pipe attached to the outer wall of the beam pipe 11; the telescopic cloth mechanism 2 includes two oppositely arranged telescopic frames, each telescopic frame includes two assembly seats 26 fixed to the outer wall of the beam pipe 11, the inner side of the two assembly seats 26 is arranged with a telescopic cloth reel 21, the elastic support arm 24 is an elastic support articulated arm, the two ends of the elastic support articulated arm are respectively articulated to the telescopic cloth reel 21 and the fabric bottom rod 23; the telescopic cloth motor 25 is provided with a driving wheel 251, the driving wheel 251 is connected with a driven wheel 27, in the embodiment, the driving wheel 251 and the driven wheel 27 are both sprockets, which are connected through a chain, the middle part of the driven wheel 27 is provided with a shaft coupling, and the two ends of the shaft coupling are respectively connected with a telescopic cloth reel 21; the shaft of the driving wheel 251 is provided with an encoder 28, the forward and reverse rotation of the telescopic cloth motor 25 is positioned by the encoder 28, the encoder 28 controls the stop of movement when the fabric bottom rod 23 extends to the position close to the lifting steel wire rope, the end of the telescopic cloth reel 21 is a square steel structure, which is matched with the shaft coupling; because the zinc ash will accumulate in the pipeline after a long time of zinc suction, the wall of the beam pipe 11 is provided with a plurality of ash removal channels, the ash removal channels are provided with upper holes and lower holes, the upper holes have a larger diameter than the lower holes, the upper holes can be used for cleaning tools and hands, and the lower holes are used for discharging the accumulated ash in the pipe cavity, the ash removal channels are provided with detachable closing covers 114, which are opened during ash removal and closed after cleaning.The lifting part 4 is a transmission chain lifting lug, the beam body 1 is provided with a vertical guide mechanism 15 at both ends, the guide mechanism 15 is a plurality of guide wheels, in the embodiment, the wheel surface of the guide wheel can be attached to two planes to realize rolling guidance, the beam body 1 is accurately controlled to rise and fall through the chain, the cloth winding motor 31 is connected to the cloth winding shaft 33 through a speed reducer, the lower part of the cloth winding 32 is provided with a counterweight, which can keep the lower part of the cloth winding 32 in a sagging state to prevent zinc smoke from overflowing laterally.

[0037] In use, two zinc pot cover lifting type top suction environment-friendly smoke exhaust cross beams are prepared, the two zinc pot cover lifting type top suction environment-friendly smoke exhaust cross beams are placed opposite to each other, so that the air inlets 111 of the two zinc pot cover lifting type top suction environment-friendly smoke exhaust cross beams are all located on the inner side, support frames can be arranged outside the zinc pots, lifting motors are arranged on the support frames, the lifting motors are fixed with the lifting parts 4 of the two zinc pot cover lifting type top suction environment-friendly smoke exhaust cross beams through lifting ropes or chains, the two zinc pot cover lifting type top suction environment-friendly smoke exhaust cross beams can be independently lifted, the on-demand suspension in and out of the workpiece to be galvanized is realized, the relative opening and closing, and the asymmetric opening and closing of the space above the zinc pot are realized through the extension and retraction of the cloth extension and retraction mechanism 2 of the two zinc pot cover lifting type top suction environment-friendly smoke exhaust cross beams, the accuracy requirement of the suspension position of the workpiece to be galvanized is low, and the adaptability is high, when the workpiece is hoisted from the feeding area to the position in front of the zinc pot, the beam body 1 is lowered, the cloth winding mechanism 3 winds the cloth 32, the height of the beam body 1 is as low as possible, so that the passage through which the workpiece to be galvanized can pass is large enough, after the workpiece passes over the beam body 1, the workpiece to be galvanized is lowered to a position close to the liquid level of the zinc pot, at this time, the beam body 1 is raised, and the cloth winding mechanism 3 is actuated to unwind the cloth 32, after the beam body 1 is raised to the required position, the cloth extension and retraction mechanism 2 starts to act, and the space above the zinc pot is maximally shielded, then the side suction on the side of the zinc pot and the air suction of the top suction cross beam are simultaneously opened, the workpiece falls to start galvanizing, and the zinc smoke is simultaneously sucked by the side suction and the top suction. After the workpiece is hot galvanized, the top cloth extension and retraction mechanism 2 is retracted to the retracted state. The beam body 1 is lowered, the cloth winding mechanism 3 is simultaneously wound, the workpiece is hoisted from above the beam body 1, and the process of hot galvanizing on the zinc pot is completed. Embodiment 2

[0038] The embodiment is to disclose a lifting type top suction environmental protection smoke exhaust beam for zinc pot cover, the difference between the embodiment and the embodiment 1 is that the beam pipe 11 is provided with a motor fixing frame 112 for fixing the telescopic cloth motor 25, the outer side pipe wall of the beam pipe 11 is provided with a wiring channel 113, in the embodiment, the wiring channel 113 is a wire slot arranged on the outer side pipe wall of the beam pipe 11;The telescopic cloth motor 25 is provided with a driving wheel 251, the driving wheel 251 is linked with a driven wheel 27, in the embodiment, the driving wheel 251 and the driven wheel 27 are both cylindrical gears, linkage is realized through external gear meshing, the middle part of the driven wheel 27 is provided with a shaft coupling, the two ends of the shaft coupling are respectively connected with a telescopic cloth reel 21;The axle of the driving wheel 251 is provided with an encoder 28, the end of the telescopic cloth reel 21 is a spline structure, the spline is matched with the shaft coupling. Embodiment 3

[0039] The embodiment is to disclose a lifting type top suction environmental protection smoke exhaust beam for zinc pot cover, the difference between the embodiment and the embodiment 1 is that, in the embodiment, the beam body 1 has only one beam pipe 11, the suction port 111 close to the air outlet is smaller than the suction port 111 far from the air outlet, so that the suction port 111 far from the air outlet can also obtain greater suction, and the suction of the suction port 111 close to the air outlet is also relatively limited, the cloth winding motor 31 is connected with the cloth winding shaft 33 through a speed reducer, the lower part of the cloth 32 is detachably connected to the ground, to prevent zinc smoke from overflowing horizontally.

[0040] It can be understood that the present application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the present application. In addition, under the guidance of the present application, the features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the present application. Therefore, the present application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the present application.

Claims

1. A lifting type top suction environmental protection smoke exhaust beam for zinc kettle cover, characterized in that, The utility model provides a kind of cloth stretching and retracting mechanism, including beam body (1), the beam body (1) includes at least two beam pipes (11) of link, beam pipe (11) upper portion is connected with stretching and retracting cloth mechanism (2), beam pipe (11) lower portion is connected with cloth winding mechanism (3), beam body (1) both ends are equipped with hoisting part (4), one side of beam body (1) is equipped with air outlet, the inner side wall of beam pipe (11) is equipped with several air inlets (111), and air inlet (111) is through between air outlet;The stretching and retracting cloth mechanism (2) includes two stretching and retracting cloth spools (21) coaxially arranged and parallel with beam pipe (11), stretching and retracting cloth spool (21) is fixed with high-temperature resistant cloth (22), high-temperature resistant cloth (22) is wrapped in stretching and retracting cloth spool (21), and high-temperature resistant cloth (22) other end is equipped with fabric bottom bar (23), stretching and retracting cloth spool (21) and fabric bottom bar (23) are equipped with elastic support arm (24) between, and two stretching and retracting cloth spools (21) are realized circumferential rotation by being equipped with stretching and retracting cloth motor (25);The stretching and retracting cloth mechanism (2) includes two oppositely arranged stretching and retracting frames, stretching and retracting frame includes two assembly seats (26) fixed with the outer wall of beam pipe (11), the inner side of two assembly seats (26) is arranged stretching and retracting cloth spool (21), and elastic support arm (24) is elastic support hinged arm, and the both ends of elastic support hinged arm are respectively hinged to stretching and retracting cloth spool (21) and fabric bottom bar (23).

2. The lifting type top suction environmental exhaust crossbeam for zinc kettle cover according to claim 1, characterized in that, The end face of the both ends of the beam pipe (11) is equipped with flange connecting plate (12), the pipe body of the beam pipe (11) is equipped with reinforcing frame (13), the air outlet is equipped with air outlet pipeline (14), the outer end face of the air outlet pipeline (14) is also equipped with flange connecting plate (12), and the pipe wall of the air outlet pipeline (14) is equipped with guide plate (141) extending to the inner cavity of the beam pipe (11), and the guide plate (141) faces the air inlet (111).

3. The lifting type top suction environmental exhaust crossbeam for zinc kettle cover according to claim 2, characterized in that, The cross section of the beam pipe (11) is a similar right-angled trapezoid, the air inlet (111) is arranged on the inclined side of the similar right-angled trapezoid, and the reinforcing frame (13) includes angle iron (131) arranged on the edge of the similar right-angled trapezoid for supporting.

4. The lifting type top suction environmental exhaust crossbeam for zinc kettle cover according to claim 1 or 3, characterized in that, The thickness of the pipe wall of the beam pipe (11) is not greater than 3 mm, the beam pipe (11) is equipped with motor fixing frame (112) for fixing the stretching and retracting cloth motor (25), and the outer side wall of the beam pipe (11) is equipped with wiring channel (113).

5. The lifting type top suction environmental exhaust crossbeam for zinc kettle cover according to claim 1, characterized in that, The stretching and retracting cloth motor (25) is equipped with driving wheel (251), the driving wheel (251) is linked with driven wheel (27), the middle part of the driven wheel (27) is equipped with shaft coupling, and the both ends of the shaft coupling are respectively matched with one stretching and retracting cloth spool (21); the axle of the driving wheel (251) is equipped with encoder (28).

6. The lifting type top suction environmental exhaust crossbeam for zinc kettle cover according to claim 1, characterized in that, The pipe wall of the beam pipe (11) is equipped with several dust removal channels, and the dust removal channels are equipped with detachable sealing cover plate (114).

7. The lifting type top suction environment-friendly smoke exhaust crossbeam for zinc kettle cover according to claim 1, characterized in that, The caliber of the air inlet (111) close to the air outlet is smaller than the caliber of the air inlet (111) far from the air outlet.

8. The lifting type top suction environmental exhaust crossbeam for zinc kettle cover according to claim 1, characterized in that, The hoisting part (4) is a transmission chain lifting lug, and the both ends of the beam body (1) are equipped with vertical guide mechanism (15).

9. The lifting type top suction environment-friendly smoke exhaust crossbeam for zinc kettle cover according to claim 1, characterized in that, The cloth winding mechanism (3) comprises a cloth winding motor (31) and a cloth winding (32), the cloth winding motor (31) is connected with a cloth winding shaft (33), a plurality of bearing seats (331) connected with the beam body (1) are uniformly arranged on the cloth winding shaft (33), a back belt wheel (332) is arranged on one side of the bearing seat (331), and a cloth winding belt (321) matched with the back belt wheel (332) is arranged on the cloth winding (32).

10. The lifting type top suction environment-friendly smoke exhaust crossbeam for zinc kettle cover according to claim 9, characterized in that, The cloth winding motor (31) is connected with the cloth winding shaft (33) through a speed reducer, and the lower part of the cloth winding (32) is provided with a counterweight or is detachably connected to the ground.

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