CN111644438B

CN111644438B - Air draft system

Info

Publication number: CN111644438B
Application number: CN202010426331.7A
Authority: CN
Inventors: 李芳�; 汪雪峰; 吴晓斐
Original assignee: Huafu Shanghai Environmental Protection Technology Co ltd
Current assignee: Huafu Shanghai Environmental Protection Technology Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-12-31
Anticipated expiration: 2040-05-19
Also published as: CN111644438A

Abstract

The invention relates to an air draft system which comprises a fan cover, an installation pipe arranged above the fan cover and an air pipe arranged in the installation pipe, wherein the air pipe is communicated with the top of the fan cover; the top of the fan cover is spaced from the bottom of the sleeve, two clamping plates are arranged at the top of the fan cover and rotatably connected with the two sides of the sleeve through rotating shafts, and the axes of the rotating shafts are arranged along the length direction of the fan cover; one side of the sleeve is hinged with a first electric push rod, the end part of a movable rod of the first electric push rod is hinged with the top of the fan cover, the rotating center lines at two ends of the first electric push rod are parallel to the axis of the rotating shaft, and the air pipe is arranged to be a corrugated pipe and the bottom of the air pipe is connected to the top of the fan cover. The invention has the effect of facilitating the adjustment of the opening angle of the fan cover.

Description

Air draft system

Technical Field

The invention relates to the technical field of air draft devices, in particular to an air draft system.

Background

At present, when carrying out industry experiment and abandonment industrial product and handle, generally can use the convulsions structure in the factory building, will some indoor harmful peculiar smell gaseous emissions when carrying out air exchange for maintain indoor comparatively good operational environment.

Present publication number is CN 209128585U's Chinese patent discloses a alligatoring groove waste gas updraft ventilator, including alligatoring groove and exhaust hood, alligatoring inslot is equipped with the positive pole copper bar, negative pole copper bar and plating solution, alligatoring groove upper end has an opening up, the opening part detachable lid of alligatoring groove is equipped with the apron, be equipped with the aspiration channel on the apron, the opening of alligatoring groove has into trench and play groove position along length direction's both ends, the relative setting of exhaust hood is in go into the top of trench and play groove position, the inside wall of exhaust hood is equipped with the inlet scoop, and the inlet scoop is close to the opening setting of going into trench and play trench, is equipped with the aspiration channel on the top lateral wall of exhaust hood. The chromic acid waste gas that foretell technical scheme can will go into groove and go out groove position work piece and distribute is directly taken out by the negative pressure of air draft cover, has connect the aspiration channel on the apron, can take out the waste gas that produces in the groove to prevent that chromic acid waste gas from distributing the pollution.

The above prior art solutions have the following drawbacks: use rigid fan and fan housing to carry out convulsions more among current updraft ventilator or the exhaust system, but indoor gaseous environment is comparatively complicated, and the fan housing can not cover whole space again, though gas can produce and flow, but the efficiency is still lower when the stationary fan housing is taking a breath in convulsions, consequently need provide one kind can adjust the exhaust system of fan housing angle and orientation, carries out more effective extraction to harmful gas.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an air draft system which has the effect of conveniently adjusting the opening direction of a fan cover and can better extract waste gas.

The above object of the present invention is achieved by the following technical solutions:

an air draft system comprises a fan cover, an installation pipe arranged above the fan cover and an air pipe arranged in the installation pipe, wherein the air pipe is communicated with the top of the fan cover; the top of the fan cover is spaced from the bottom of the sleeve, two clamping plates are arranged at the top of the fan cover and rotatably connected with the two sides of the sleeve through rotating shafts, and the axes of the rotating shafts are arranged along the length direction of the fan cover; one side of the sleeve is hinged with a first electric push rod, the end part of a movable rod of the first electric push rod is hinged with the top of the fan cover, the rotating center lines at two ends of the first electric push rod are parallel to the axis of the rotating shaft, and the air pipe is arranged to be a corrugated pipe and the bottom of the air pipe is connected to the top of the fan cover.

By adopting the technical scheme, the structure of the installation pipe is used for installing the fan cover, the top of the installation pipe can be fixed on a ceiling or a suspended ceiling, the end part of the air pipe can be connected with a fan for extracting air, the structure of the clamping plate at the top of the fan cover is added to realize the rotary connection between the fan cover and the installation pipe, and the position fixation of the sleeve is realized through the structure of the fastening piece; the structure of the electric push rod I is increased, the electric push rod can drive the fan housing to rotate during working, the orientation of the fan housing is changed, the fan housing changes the direction continuously during working, and waste gas in a factory building is extracted more effectively.

The present invention in a preferred example may be further configured to: the top of the fan housing is provided with two pull rings, the pull rings are connected with a steel cable, the top of the steel cable is provided with a connecting piece, the connecting piece comprises a connecting sleeve and a stud, the top of the connecting sleeve is connected with a connecting rod, the bottom of the stud is rotatably connected with the steel cable, and internal threads are formed inside the connecting sleeve and are in threaded fit with the stud.

Through adopting above-mentioned technical scheme, increased the structure of cable wire, pull ring and connecting piece. The connecting sleeve in the connecting piece is connected with the connecting rod and can be fixed on a suspended ceiling or a ceiling, the stud is rotatably connected with the steel cable, the top of the stud is in threaded fit with the connecting sleeve, the position of the stud in the connecting sleeve can be moved by rotating the stud, and the height of the fan cover can be conveniently adjusted.

The present invention in a preferred example may be further configured to: the through-hole has been seted up at the fan housing top, and the tuber pipe opening sets up towards the through-hole, and the shaping of tuber pipe bottom has the go-between, is provided with the rubber circle between go-between and the fan housing top, is provided with the screw on the go-between, and the screw passes go-between and rubber circle and with fan housing screw-thread fit.

Through adopting above-mentioned technical scheme, the structure that has increased the through-hole is used for and tuber pipe intercommunication, and the shaping of tuber pipe bottom has go up ring structure cooperation screw and has realized the installation, has increased the structure of rubber circle simultaneously for the junction is comparatively sealed.

The present invention in a preferred example may be further configured to: notches are formed in two sides of the width direction of the fan cover and are rotatably provided with baffles, the rotating center line of each baffle is arranged along the length direction of the fan cover, and the sum of the widths of the baffles is not less than the width of the fan cover; an electric push rod II is arranged in the fan cover; the baffle is provided with a sliding groove and a sliding block which are installed in a sliding mode along the width direction, the top of the electric push rod II is connected with the inside of the fan cover, the end portion of the movable rod of the electric push rod II is hinged to the sliding block, and an arc-shaped protrusion is arranged on one side, close to the baffle, of the baffle.

By adopting the technical scheme, the structure of the baffle is added, when the air pipe stops extracting air, the baffles are mutually closed through the work of the electric push rod II, so that the fan cover is in a closed state, and water drops condensed on the fan cover due to air extraction can fall onto the baffles along the fan cover, so that the air cover is not easy to fall onto the ground to cause pollution; meanwhile, after the baffle is closed, external insects, dust and the like are not easy to enter the fan cover.

The present invention in a preferred example may be further configured to: barrier strips are formed at two ends of the baffle plate, a spongy cushion is arranged between the barrier strips, an installation plate is arranged at the bottom of the spongy cushion, and notches for avoiding arc-shaped rods and sliding grooves are formed in the installation plate and the spongy cushion; a dovetail strip is formed at one side of each barrier strip, which is close to each other, and dovetail grooves matched with the dovetail strips are formed at two ends of the mounting plate; the mounting panel both ends shaping is fluted, installs the flexure strip of slope in the recess, and the flexure strip bottom is arranged in the recess, and the one side that the blend stop is close to each other is provided with the draw-in groove, and the flexure strip extends to in the draw-in groove and offsets with the draw-in groove both sides.

By adopting the technical scheme, the mounting plate and the spongy cushion are mounted by using the structures of the barrier strips, the dovetail grooves and the dovetail strips, and the mounting plate is initially mounted along the sliding groove during mounting; the structure of the groove and the elastic sheet on the mounting plate is added, the elastic sheet is pressed to enter the groove when the mounting plate is mounted, and after the groove and the clamping groove are in corresponding positions, the elastic sheet can enter the clamping groove due to the elastic effect, so that the connection between the groove and the clamping groove is realized, the limiting effect on the mounting plate is achieved, and the mounting structure is more stable; through the structure of foam-rubber cushion, when carrying out the rotation of fan housing, electric putter two expandes the baffle, because pivoted influence, the drop of water that accumulates on the fan housing inner wall can follow inner wall flow direction both sides, finally falls into on the foam-rubber cushion and is absorbed, can not fall into ground and cause the pollution, does benefit to the clean and tidy of maintaining the environment.

The present invention in a preferred example may be further configured to: be provided with the arc pole on the baffle, the centre of a circle of arc pole is located the baffle rotation center line, and when the baffle was closed, the arc pole extended to the fan housing top, and the sleeve pipe both sides all are provided with the limiting plate, set up the arc wall that holds the arc pole on the limiting plate.

By adopting the technical scheme, the structure of the arc-shaped rod is increased, when the baffle is closed or unfolded at a small angle, the arc-shaped rod can enter the connecting sleeve, the limiting effect on the fan cover is achieved through the action of the arc-shaped rod and the connecting sleeve, and the fan cover cannot rotate relative to the mounting pipe at the moment; when the fan cover rotates, water drops condensed on the fan cover due to air extraction can more easily fall along the two sides of the fan cover because of the movement of the fan cover, when the angle of the closed baffle or the opened baffle is smaller, a smaller angle is kept between the baffle and the side wall of the fan cover, the water drops moving along the fan cover easily fall through the joint of the baffle at the moment, and water drops easily cause pollution when falling on the ground, so that the air cover is extracted by adopting the rotation of the fan cover limited by the structure under the condition that the opening of the baffle is smaller, even if the water drops are left along the two sides of the fan cover, the water drops cannot be thrown to the ground because of the rotation of the fan cover, and the possibility of pollution is reduced; when the opening angle of the baffle is larger, water drops caused by rotation of the fan cover flow and flow onto the sponge of the baffle along the fan cover, so that pollution is not easily caused.

The present invention in a preferred example may be further configured to: the fan housing is installed the filter screen board in the through-hole bottom, and the filter screen board is provided with the collar all around, and the shaping of collar top has the installation pole, and the shaping of installation pole top has the arc piece along the circumferencial direction, and the centre of a circle of arc piece falls on the axis of filter screen board, is provided with on the fan housing with installation pole complex mounting groove, the mounting groove tip along the circumferencial direction shaping have with arc piece complex joint groove.

By adopting the technical scheme, the structure of the filter screen plate is installed, so that one-time filtration at the outlet of the through hole can be carried out for filtering granular impurities; the structure of installation pole and arc piece has been used, will install the pole when installing and send into the mounting groove of fan housing, once rotate for the arc piece enters into the joint groove, has realized the installation of filter plate.

The present invention in a preferred example may be further configured to: a return spring is arranged in the clamping groove, a bent metal sheet is arranged in the clamping groove, two ends of the return spring are respectively connected to the top of the clamping groove and the metal sheet, and the metal sheet is tightly propped against the arc-shaped sheet; the bending direction of the metal sheet is gradually far away from the bottom of the clamping groove and is bent upwards.

By adopting the technical scheme, the structures of the reset spring and the metal sheet are added, the arc-shaped sheet enters the clamping groove when the filter screen is installed, the metal sheet is bent, the arc-shaped sheet acts on the bent part to enable the metal sheet to move, finally, the arc-shaped sheet falls below the metal sheet and abuts against the metal sheet, the limit on the arc-shaped sheet is realized through the action of the reset spring and the metal sheet, and the installation of the filter screen is more stable; when the filter screen plate is disassembled, the filter screen plate is reversely rotated, so that the arc-shaped sheet is separated from the clamping groove, and the filter screen plate can be disassembled.

The present invention in a preferred example may be further configured to: the fastening piece is set to be a fastening screw, and the fastening screw is in threaded fit with the sleeve and extends into the sleeve to be tightly abutted against the mounting pipe.

Through adopting above-mentioned technical scheme, use fastening screw's structure, can strengthen the connection between sleeve pipe and the installation pipe for the sleeve pipe is difficult for appearing rocking, and holistic mounting structure is more stable.

In summary, the invention includes at least one of the following beneficial technical effects:

the structure of the clamping plate at the top of the fan cover is added, so that the fan cover is rotationally connected with the mounting pipe, and the position of the sleeve is fixed through the structure of the fastening piece; the structure of the electric push rod I is added, the electric push rod I can drive the fan cover to rotate when working, the orientation of the fan cover is changed, and the fan cover continuously changes the direction when working, so that waste gas in a factory building is more effectively extracted;

the structure of the baffle is added, the structure of the sponge cushion is added on the baffle, when the air pipe stops extracting air, the baffles are mutually closed through the work of the electric push rod II, so that the fan cover is in a closed state, and water drops condensed on the fan cover due to air extraction can fall onto the baffle along the fan cover, so that the fan cover is not easy to fall onto the ground to cause pollution; meanwhile, after the baffle is closed, external insects, dust and the like are not easy to enter the fan cover;

the structure of filter screen board has been increased for carry out prefilter to the air, great granule is left for the inside difficult jam that appears of tuber pipe uses the structure of collar, installation pole and arc piece, will install the pole and send into the mounting groove and carry out once to rotate and just can realize the installation to filter screen board, and filter screen board's installation dismantlement is comparatively convenient.

Drawings

FIG. 1 is a schematic diagram of the main structure of the present invention;

FIG. 2 is a schematic view of the construction of the baffle of the present invention;

FIG. 3 is a schematic view of a sponge pad installation of the present invention;

FIG. 4 is a schematic view of a screen plate mounting structure according to the present invention;

fig. 5 is a schematic view of the mounting bar mounting structure of the present invention.

Reference numerals: 1. a fan housing; 11. a splint; 12. a rotating shaft; 13. a steel cord; 14. a stud; 15. connecting sleeves; 16. a connecting rod; 2. installing a pipe; 3. a sleeve; 31. fastening screws; 32. a limiting plate; 33. an arc-shaped slot; 34. an electric push rod I; 4. an air duct; 41. a connecting ring; 42. a rubber ring; 5. a baffle plate; 51. rotating the rod; 52. blocking strips; 53. a card slot; 54. an arcuate bar; 55. a second electric push rod; 56. a chute; 6. a sponge cushion; 60. a notch; 61. a groove; 62. an elastic sheet; 63. mounting a plate; 64. a sponge block; 7. a filter screen plate; 71. a mounting ring; 72. mounting a rod; 73. an arc-shaped sheet; 8. mounting grooves; 81. a clamping groove; 82. a return spring; 83. a metal sheet.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the air exhaust system disclosed by the present invention includes a fan housing 1, a mounting pipe 2 disposed above the fan housing 1, and an air pipe 4 disposed inside the mounting pipe 2.

Referring to fig. 1, tuber pipe 4 and fan housing 1 top intercommunication, the outside cover of installation pipe 2 is equipped with sleeve pipe 3, and sleeve pipe 3 is along the vertical slip of 2 length direction of installation pipe, and sleeve pipe 3 both sides are provided with the fastener, and this fastener uses fastening screw 31, and

fastening screw

31 and 3 screw-thread fit of sleeve pipe extend to sleeve pipe 3 inside and support tightly with installation pipe 2, and the structure through fastening screw 31 has fixed the sleeve pipe 3 structure.

Referring to fig. 1, a gap is left between the top of the fan housing 1 and the bottom of the casing 3, two clamping plates 11 are formed at the top of the fan housing 1, and the clamping plates 11 are arranged perpendicular to the fan housing 1. The clamping plate 11 is rotatably connected with two sides of the sleeve 3 through a rotating shaft 12, and the axis of the rotating shaft 12 is arranged along the length direction of the fan cover 1. The articulated electric putter 34 that has in sleeve 3 one side, the movable rod tip of electric putter 34 is articulated with 1 top of fan housing, the rotation center line at 34 both ends of electric putter is parallel with the axis of pivot 12, tuber pipe 4 sets up to bellows and 4 bottoms of tuber pipe are connected to 1 tops of fan housing, 4 bottoms of tuber pipe and 1 inside intercommunications of fan housing, use tuber pipe 4 to connect the fan and can be used for extracting the air when using, 2 tops of installation pipe can be fixed on smallpox or hang the top, realize overall structure's installation.

Referring to fig. 1, two pull rings are formed at the top of a fan housing 1, the pull rings are connected with a steel cable 13, a connecting piece is arranged at the top of the steel cable 13, the connecting piece comprises a connecting sleeve 15 and a stud 14, the top of the connecting sleeve 15 is connected with a connecting rod 16, the bottom of the stud 14 is rotatably connected with the steel cable 13, and internal threads are formed inside the connecting sleeve 15 and are in threaded fit with the stud 14. When the fan cover is used, the fastening screw 31 is unscrewed, the stud 14 can move in the connecting sleeve 15 by rotating the stud 14, and the stud 14 can drive the fan cover 1 to ascend, so that the height adjusting effect is achieved.

Referring to fig. 1 and 2, notches are formed in both sides of the wind shield 1 in the width direction, a baffle 5 is rotatably mounted through a rotating rod 51, a rotation center line of the baffle 5 (i.e., an axis of the rotating rod 51) is formed along the length direction of the wind shield 1, and the sum of the widths of the baffles 5 is not less than the width of the wind shield 1. Be provided with electric putter two 55 in the fan housing 1, seted up spout 56 and slidable mounting slider along width direction on the baffle 5, electric putter two 55 top and fan housing 1 internal connection, the movable rod tip of electric putter two 55 is articulated with the slider, and one side that baffle 5 is close to each other is provided with the arc arch. The rotation of the baffle 5 can be realized by using the structure of the electric push rod II 55, when the baffle 5 is opened, the air draft of the fan cover 1 can be normally carried out, when the baffle 5 is closed, the fan cover 1 can be closed, the shielding of the fan cover 1 is realized, and the possibility of dust and impurities entering the fan cover 1 is reduced.

Referring to fig. 2 and 3, the baffle 5 is formed with barrier strips 52 at both ends, the foam-rubber cushion 6 is installed between the barrier strips 52, the bottom of the foam-rubber cushion 6 is fixed with an installation plate 63, and the installation plate 63 and the foam-rubber cushion 6 are provided with notches 60 avoiding the sliding grooves 56. A dovetail strip is formed at one side of the barrier strips 52 close to each other, and dovetail grooves matched with the dovetail strips are formed at two ends of the mounting plate 63. The mounting plate 63 has grooves 61 formed at both ends thereof, the grooves 61 are provided with inclined elastic pieces 62, the bottoms of the elastic pieces 62 are located in the grooves 61, the blocking strips 52 are provided with clamping grooves 53 at one sides close to each other, and the elastic pieces 62 extend into the clamping grooves 53 and are abutted against both sides of the clamping grooves 53. When installing, carry out the dovetail rather than the cooperation along the length direction of dovetail, crooked flexure strip 62 makes it enter into recess 61 simultaneously, continues to move and makes flexure strip 62 and draw-in groove 53 align, and flexure strip 62 offsets in can entering into draw-in groove 53 and draw-in groove 53 both sides at the effect of self elasticity, has played the spacing effect to mounting panel 63 and foam-rubber cushion 6. The installation of the spongy cushion 6 is realized, the sponge block 64 is formed at the opening of the notch 60, one end of the sponge block 64 is formed on the spongy cushion 6, and the other end of the sponge block is abutted against the other side of the notch 60.

Referring to fig. 2 and 3, the structure of the sponge cushion 6 is added, when the wind cover 1 rotates, the baffle 5 is unfolded by the electric push rod two 55, and due to the rotating influence of the wind cover 1, water drops accumulated on the inner wall of the wind cover 1 can flow to two sides from the inner wall, and finally fall into the sponge cushion 6 to be sucked, so that the water drops cannot fall into the ground to cause pollution, and the environment is maintained neatly.

Referring to fig. 2 and 3, an arc rod 54 is fixed on the baffle 5, the circle center of the arc rod 54 is located on the axis of the rotating rod 51, the arc rod 54 passes through the notch 60 and extends upwards, when the electric push rod two 55 drives the baffle 5 to rotate to be closed, the arc rod 54 extends to the upper side of the fan housing 1, the two sides of the casing 3 are both provided with the limiting plates 32, and the limiting plates 32 are provided with arc grooves 33 for accommodating the arc rod 54. The top of the fan housing 1 is provided with a hole for the arc rod 54 to pass through, preferably, the top of the hole is hinged with a rubber sheet, and when the arc rod 54 is separated from the rubber sheet, the rubber sheet covers the hole, so that the influence of the opening on the air draft of the fan housing 1 is reduced.

Referring to fig. 2 and 3, when the baffle 5 is closed or unfolded at a small angle, the arc rod 54 enters the connecting sleeve 15, the limiting effect on the fan housing 1 is achieved through the arc rod 54 and the connecting sleeve 15, and the fan housing 1 cannot rotate relative to the installation pipe 2 at this time. When the fan housing 1 rotates, water drops condensed from the extracted air on the fan housing 1 can more easily fall along two sides of the fan housing 1 due to the rotation of the fan housing 1. When the angle of closing or opening the baffle 5 is smaller, a smaller angle is kept between the baffle 5 and the side wall of the fan housing 1, at the moment, water drops moving along the fan housing 1 easily fall through the connecting part where the baffle 5 is rotatably installed, and the water drops fall on the ground to easily cause pollution. Therefore, under the condition that the opening of the baffle 5 is small, the wind shield 1 is limited to rotate by adopting the structure, air is extracted under the static state of the wind shield 1, even if water drops are left along the two sides of the wind shield 1, the water drops cannot be thrown to the ground due to the rotation of the wind shield 1, and the possibility of pollution is reduced. When the opening angle of the baffle 5 is larger, water drops caused by rotation of the fan cover 1 flow and also flow onto the sponge of the baffle 5 along the fan cover 1, so that pollution is not easily caused.

Referring to fig. 4 and 5, a through hole is formed in the top of the fan housing 1, an opening of the air duct 4 is arranged toward the through hole, a connection ring 41 is formed at the bottom of the air duct 4, a rubber ring 42 is arranged between the connection ring 41 and the top of the fan housing 1, and a screw is arranged on the connection ring 41 and penetrates through the connection ring 41 and the rubber ring 42 and is in threaded fit with the fan housing 1. Filter screen plate 7 is installed to fan housing 1 in through-hole bottom, filter screen plate 7 is provided with collar 71 all around, collar 71 top shaping has installation pole 72, installation pole 72 top has arc piece 73 along the circumferencial direction shaping, the centre of a circle of arc piece 73 falls on filter screen plate 7's axis, be provided with on the fan housing 1 with installation pole 72

complex mounting groove

8, 8 tip of mounting groove have along the circumferencial direction shaping with arc piece 73 complex curved joint groove 81.

Referring to fig. 4 and 5, the filter screen plate 7 is installed by adopting the structure of the connection ring, and when the filter screen plate 7 is used, the installation rod 72 is sent into the installation groove 8, so that the arc-shaped sheets 73 at the end part of the installation rod 72 enter the clamping groove 81, and the installation of the filter screen plate 7 is realized.

Referring to fig. 4 and 5, in order to make the installation of the filter screen plate 7 more stable, a return spring 82 is arranged in the clamping groove 81, a bent metal sheet 83 is arranged in the clamping groove 81, two ends of the return spring 82 are respectively connected to the top of the clamping groove 81 and the metal sheet 83, and the metal sheet 83 abuts against the arc-shaped sheet 73; the metal piece 83 is bent in a direction gradually away from the bottom of the catching groove 81 and bent upward. When the installation is carried out, rotating filter screen plate 7 can make arc piece 73 work on sheetmetal 83, because sheetmetal 83 is crooked to be set up, arc piece 73 can be used in sheetmetal 83 and make sheetmetal 83 rebound, and finally arc piece 73 enters into the below of sheetmetal 83, makes sheetmetal 83 and arc piece 73 support tightly under the effect of spring for filter screen plate 7's installation is more stable.

The implementation principle of the embodiment is as follows: the structure that has used installation pipe 2 carries out the installation of fan housing 1, and installation pipe 2 top can be fixed on ceiling or furred ceiling, and the fan can be connected to 4 tip of tuber pipe is used for carrying out the extraction of air, has increased the structure of splint 11 at fan housing 1 top and has realized the rotation of fan housing 1 and installation pipe 2 and be connected, and the structure that uses fastening screw 31 makes sleeve pipe 3's position fixed. Electric putter during operation can drive fan housing 1 and rotate, has changed the orientation of fan housing 1, and fan housing 1 during operation, the redirecting that does not stop carries out more effective extraction to the waste gas in the factory building.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides an exhaust system, includes fan housing (1), sets up installation pipe (2) in fan housing (1) top and sets up in inside tuber pipe (4) of installation pipe (2), tuber pipe (4) and fan housing (1) top intercommunication, its characterized in that: a sleeve (3) is sleeved outside the mounting pipe (2), the sleeve (3) vertically slides along the length direction of the mounting pipe (2), and fasteners are arranged on two sides of the sleeve (3); the top of the fan cover (1) is spaced from the bottom of the sleeve (3), two clamping plates (11) are arranged at the top of the fan cover (1), the clamping plates (11) are rotatably connected with the two sides of the sleeve (3) through rotating shafts (12), and the axis of each rotating shaft (12) is arranged along the length direction of the fan cover (1); one side of the sleeve (3) is hinged with a first electric push rod (34), the end part of a movable rod of the first electric push rod (34) is hinged with the top of the fan cover (1), the rotating center lines of the two ends of the first electric push rod (34) are parallel to the axis of the rotating shaft (12), the air pipe (4) is arranged as a corrugated pipe, and the bottom of the air pipe (4) is connected to the top of the fan cover (1);

notches are formed in two sides of the width direction of the fan cover (1) and are rotatably provided with baffles (5), the rotating center line of the baffles (5) is arranged along the length direction of the fan cover (1), and the sum of the widths of the baffles (5) is not less than the width of the fan cover (1); an electric push rod II (55) is arranged in the fan cover (1); a sliding groove (56) is formed in the baffle (5) in the width direction, a sliding block is installed in the sliding groove, the top of the electric push rod II (55) is connected with the inside of the fan cover (1), the end part of a movable rod of the electric push rod II (55) is hinged with the sliding block, and an arc-shaped bulge is arranged on one side, close to each other, of the baffle (5);

blocking strips (52) are formed at two ends of the baffle (5), a spongy cushion (6) is arranged between the blocking strips (52), an installation plate (63) is arranged at the bottom of the spongy cushion (6), and notches (60) of the avoidance sliding grooves (56) are arranged on the installation plate (63) and the spongy cushion (6); dovetail strips are formed on one sides, close to each other, of the barrier strips (52), and dovetail grooves matched with the dovetail strips are formed at two ends of the mounting plate (63); the mounting plate (63) both ends shaping is fluted (61), installs the flexure strip (62) of slope in recess (61), and flexure strip (62) bottom is arranged in recess (61), and the one side that blend stop (52) are close to each other is provided with draw-in groove (53), and flexure strip (62) extend to in draw-in groove (53) and offset with draw-in groove (53) both sides.

2. The air extraction system of claim 1, further comprising: the top of the fan housing (1) is provided with two pull rings, the pull rings are connected with a steel cable (13), the top of the steel cable (13) is provided with a connecting piece, the connecting piece comprises a connecting sleeve (15) and a stud (14), the top of the connecting sleeve (15) is connected with a connecting rod (16), the bottom of the stud (14) is rotatably connected with the steel cable (13), and an internal thread is formed inside the connecting sleeve (15) and is in threaded fit with the stud (14).

3. The air extraction system of claim 1, further comprising: the through hole has been seted up at fan housing (1) top, and tuber pipe (4) opening sets up towards the through hole, and the shaping has go-between (41) bottom tuber pipe (4), is provided with rubber circle (42) between go-between (41) and fan housing (1) top, is provided with the screw on the go-between, and the screw passes go-between (41) and rubber circle (42) and with fan housing (1) screw-thread fit.

4. The air extraction system of claim 1, further comprising: be provided with arc pole (54) on baffle (5), the centre of a circle of arc pole (54) is located baffle (5) rotation central line, and when baffle (5) were closed, arc pole (54) extended to fan housing (1) top, and sleeve pipe (3) both sides all are provided with limiting plate (32), offered arc wall (33) that hold arc pole (54) on limiting plate (32).

5. The air extraction system of claim 3, wherein: filter screen board (7) are installed to fan housing (1) bottom the through-hole, filter screen board (7) are provided with collar (71) all around, collar (71) top shaping has installation pole (72), installation pole (72) top has arc piece (73) along the circumferencial direction shaping, the centre of a circle of arc piece (73) falls on the axis of filter screen board (7), be provided with on fan housing (1) with installation pole (72) complex mounting groove (8), mounting groove (8) tip have along the circumferencial direction shaping with arc piece (73) complex joint groove (81).

6. The air extraction system of claim 5, wherein: a return spring (82) is arranged in the clamping groove (81), a bent metal sheet (83) is arranged in the clamping groove (81), two ends of the return spring (82) are respectively connected to the top of the clamping groove (81) and the metal sheet (83), and the metal sheet (83) is abutted against the arc-shaped sheet (73); the bending direction of the metal sheet (83) is gradually far away from the bottom of the clamping groove (81) and bends upwards.

7. The air extraction system of claim 1, further comprising: the fastening piece is set to be a fastening screw (31), and the fastening screw (31) is in threaded fit with the sleeve (3) and extends into the sleeve (3) to be tightly abutted against the mounting pipe (2).