CN111396346B - Check valve convenient to control for roof type fan - Google Patents
Check valve convenient to control for roof type fan Download PDFInfo
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- CN111396346B CN111396346B CN202010195002.6A CN202010195002A CN111396346B CN 111396346 B CN111396346 B CN 111396346B CN 202010195002 A CN202010195002 A CN 202010195002A CN 111396346 B CN111396346 B CN 111396346B
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- hollow square
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
- F04D25/14—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures and having shutters, e.g. automatically closed when not in use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
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Abstract
The invention discloses a check valve convenient to control for a roof fan, which comprises a hollow square tube, fixing devices arranged at the upper end and the lower end of the hollow square tube, and a sealing device arranged in the hollow square tube and used for isolating indoor and outdoor air exchange; the invention can prevent outdoor air from flowing backwards indoors and isolate indoor and outdoor air exchange under the condition that the fan is not started on the premise of not increasing installation space and electrical control.
Description
Technical Field
The invention relates to the technical field of fans, in particular to a check valve convenient to control for a roof type fan.
Background
At present, according to the development situation of domestic industry and civil buildings, the requirement on building ventilation is higher and higher, a roof type air feeder generally does not need to supply air to the indoor in winter, and usually in an unused state, the outdoor pipe and the indoor pipe are communicated through a fan in the state, indoor air and outdoor air can be exchanged, and the indoor air cannot keep warm; in order to prevent outdoor air from flowing backwards indoors and isolate indoor and outdoor air exchange, an indoor and outdoor air exchange preventing device is needed, the fan is vertically installed due to the particularity of roof fan installation, so that the check valve is required to be horizontally installed, some general gravity check valves in the current market can only be used in an exhaust state and cannot be used in an air supply state, and usually are replaced by electric air valves, the electric air valves enable the electrical control of roof blowers to become complex, and meanwhile, the installation space and the operation cost are increased.
Disclosure of Invention
The invention provides a check valve convenient to control for a roof fan, aiming at overcoming the defects of the prior art, and under the premise of not increasing installation space and electric control and under the condition that the fan is not started, the check valve can prevent outdoor air from flowing backwards indoors and isolate indoor and outdoor air exchange.
In order to achieve the purpose, the invention adopts the following technical scheme: a check valve convenient to control for a roof fan comprises a hollow square tube, fixing devices arranged at the upper end and the lower end of the hollow square tube, and a sealing device arranged in the hollow square tube and used for isolating indoor and outdoor air exchange, wherein the sealing device comprises a first sealing baffle and a second sealing baffle which are fixedly arranged on the opposite inner wall of the hollow square tube, a first shaft mop and a second shaft mop which are fixedly arranged on the other opposite inner wall of the hollow square tube, a plurality of rotating shafts which are respectively arranged on the first shaft mop and the second shaft mop in a rotating way at two ends, a plurality of eccentric blades which are fixedly arranged on the plurality of rotating shafts, a plurality of first connecting pieces and second connecting pieces which are fixedly arranged on the short sides of the plurality of eccentric blades, a blocking rod fixedly arranged on the inner wall of the hollow square tube, a first connecting rod which is simultaneously rotatably arranged with the plurality of first connecting pieces, a second connecting rod which is simultaneously rotatably arranged with the plurality of second connecting, The second adjusting block is arranged in the middle of the second connecting rod; when the roof blower is not operated, the short side weight of the eccentric blade is applied by a first connecting rod and a second connecting rod as well as a first adjusting block and a second adjusting block, the weight of the short side of the eccentric blade is greater than that of the long side, and the blade is closed by utilizing a lever principle; when the roof blower blows air to the indoor, because the pressure generated by the blower is applied to the eccentric blade, the long-side pressure of the eccentric blade is larger than the short-side pressure, when a certain pressure difference exists, the long-side pressure of the eccentric blade overcomes the gravity of the short side, so that the eccentric blade rotates around the axis of the rotating shaft, and even if the eccentric blade is opened, the opening pressure can be adjusted through the first adjusting block and the second adjusting block; the first sealing baffle and the second sealing baffle seal the eccentric blade at the head end and the eccentric blade at the tail end and limit the eccentric blades at the tail end at the same time, so that the eccentric blades are horizontally arranged in a closed state; the opening angle of the eccentric blade can be limited by the fixed position of the stop lever; by the aid of the air conditioner, on the premise that installation space and electric control are not increased, outdoor air is prevented from flowing back indoors under the condition that the fan is not started, and indoor and outdoor air exchange is isolated; the check valve is very convenient to install, can be embedded in a hole formed in the basis of the roof blower, does not need extra installation space, is higher in reliability and safety due to no intervention in the aspect of electricity, reduces the management cost and the manufacturing cost, and has no very high market prospect.
The sealing device also comprises a first fixing block fixedly arranged on the first connecting sheet, a second fixing block fixedly arranged on the second connecting sheet, a first rod penetrating the first fixing block, a second rod penetrating the second fixing block, a first spring with one end fixedly arranged at the upper end of the first rod and the other end fixedly arranged on the first fixing block, a second spring with one end fixedly arranged at the upper end of the second rod and the other end fixedly arranged on the second fixing block, a first magnet and a second magnet respectively fixedly arranged on the first adjusting block and the second adjusting block, a third magnet and a fourth magnet respectively matched with the first magnet and the second magnet and fixedly arranged on the inner wall of the hollow square tube, a plurality of first grooves arranged on the end face of the third magnet and a plurality of second grooves arranged on the end face of the fourth magnet; the first connecting piece is provided with a first fixed block, the second connecting piece is provided with a second fixed block, the first fixed block is provided with a first rod, the first spring and the second fixed block are provided with a second rod and a second spring, when the eccentric blade is closed, the first fixed block and the second fixed block are respectively contacted with the upper end surfaces of the first shaft bracket and the second shaft bracket, the eccentric blade is limited again, the first rod on the first fixed block is firstly contacted with the first shaft bracket through the arrangement of the first rod and the second rod, the second rod on the second fixed block is firstly contacted with the second shaft bracket, the first rod and the second rod move, and then the first spring and the second spring play a role in damping the first rod and the second rod, the damping device has a damping effect on the closed eccentric blade, and can effectively avoid the deformation of the eccentric blade caused by overlarge stress in the closing process of the eccentric blade, thereby avoiding the influence on sealing after the deformation of the eccentric blade; the first magnet is arranged on the first adjusting block, the second magnet is arranged on the second adjusting block, the third magnet and the fourth magnet are arranged on the inner wall of the hollow square tube, so that in the opening process of the eccentric blade, the first magnet and the third magnet generate attraction force with each other, the second magnet and the fourth magnet generate attraction force with each other, thereby be convenient for eccentric blade open, through the aforesaid setting up forced draught blower adjustment wind-force size in-process, make eccentric blade remain the open mode throughout, the forced draught blower is closed through a plurality of first recesses on the third magnet terminal surface and a plurality of second recesses on the fourth magnet terminal surface, make first magnet and third magnet area of contact reduce, make second magnet and fourth magnet area of contact reduce, rethread first adjusting block and second adjusting block make break away from between first magnet and the third magnet and second magnet and break away from with fourth magnet, simultaneously above-mentioned setting can play the effect of delaying to close to eccentric blade.
The sealing device also comprises a plurality of turning plates which are arranged on one long side of the eccentric blade and can be turned upwards, a plurality of arc guide rails which penetrate through the turning plates and are fixedly arranged on the eccentric blade, a third spring with one end fixedly arranged on the eccentric blade and the other end fixedly arranged on the turning plates and sleeved on the arc guide rails, a plurality of rollers which are positioned at the two ends of the turning plates and are rotatably arranged on the inner wall of the hollow square tube, a plurality of eccentric air deflectors which are positioned above the eccentric blade and are rotatably arranged on the inner wall of the hollow square tube, limiting grooves which are arranged at the two sides of the eccentric air deflectors and are arranged on the inner wall of the hollow square tube, limiting rods which are fixedly arranged at the two sides of the eccentric air deflectors and are arranged, the special-shaped air guide plate group comprises a first special-shaped plate and a second special-shaped plate, the first special-shaped plate and the second special-shaped plate are identical in structure, and the first special-shaped plate comprises a first arc-shaped section, a second arc-shaped section and a vertical section; when the eccentric blades are opened, the plurality of turning plates on the eccentric blades are turned over through the third springs, so that the resistance of the surfaces of the eccentric blades is improved in the process of supplying air to the indoor space, the eccentric blades are opened more easily, the turning plates on the eccentric blades are contacted with the rollers when the eccentric blades are closed, the turning plates are closed through the extrusion of the rollers, the rollers are rotatably arranged on the hollow square tubes, the rollers are positioned on the surfaces of the turning plates to roll in the process of extruding the turning plates through the rollers, and the friction between the rollers and the; wind acts on the eccentric blade in the process of supplying air to the indoor, partial wind acts on the eccentric air deflector, namely a downward conical air supply channel is formed between the eccentric air deflector and the eccentric blade, and respectively supplies reverse acting force to the eccentric air deflector and the eccentric blade to rotate, the rotating angle of the eccentric air deflector is controlled by a limiting groove and a limiting rod, so that the pressure difference of the eccentric blade is improved, the eccentric blade is easier to open, the turning plate is also opened in the opening process of the eccentric blade, partial wind is supplied to the indoor through the opening position of the turning plate, the clockwise thrust of the wind on the eccentric blade by the side edge is counteracted, the eccentric blade is better kept in the opening state, the wind direction of the wind supplied to the indoor is changed through the arrangement of a plurality of groups of special-shaped air deflector groups, the wind speed between the first special-shaped plate and the second special-shaped plate is accelerated through the arrangement of the first special-shaped, the wind speed on the surface of the eccentric blade is accelerated, so that more wind energy can act on the eccentric blade, the eccentric blade is kept in a maximum opening state in the air supply adjusting process, the resistance force applied in the air supply process is reduced, the wind direction below the eccentric blade is changed through the first arc-shaped section and the second arc-shaped section, a vortex is formed between the first arc-shaped section and the second arc-shaped section on the second special-shaped plate and the eccentric blade, the suction force in the anticlockwise direction is generated on the eccentric blade through the first arc-shaped section and the second arc-shaped section on the first special-shaped plate in a similar way, and the wind energy which is most always sent into a room can be vertically downward through the arrangement of the vertical section; in the process of exhausting air to the outdoor, firstly, air is supplied to the indoor to open the eccentric blade, then the extension tooth of the eccentric blade is closed, the air supply direction is changed, the indoor air is exhausted to the outdoor, an upward conical air supply channel is formed between the eccentric air deflector and the eccentric blade, and the eccentric blade is kept in an open state, the turning plate is arranged to gather wind and improve resistance to wind acting on the eccentric blade, the wind power anticlockwise borne by the eccentric blade is improved, partial wind passes through the opening at the turning plate to offset the clockwise force of the wind at the side edge of the eccentric blade, the wind power above the first arc-shaped section and the second arc-shaped section on the second special-shaped plate is reduced, the wind power below the eccentric blade, namely the clockwise wind power to the eccentric blade, is obliquely upward in the air exhaust process through the first arc-shaped section on the first special-shaped plate, so that the anticlockwise wind power to the eccentric blade is improved; through the arrangement, the check valve can be sealed, and can realize bidirectional air supply and the opening of the check valve is not influenced by the size of the air supply.
The fixing device comprises a first fixing component arranged at the upper end of the hollow square pipe, a second fixing component arranged at the lower end of the hollow square pipe, wherein the first fixing component is identical to the second fixing component in structure, the first fixing component comprises four first T-shaped blocks fixedly arranged at the upper ends of four side walls of the hollow square pipe, a plurality of sliding blocks slidably arranged on the first T-shaped blocks, a first guide post and a second guide post fixedly arranged on the sliding blocks, an inclined block simultaneously sleeved on the first guide post and the second guide post, a fourth spring with one end fixedly arranged on the inclined block at the other end of the sliding block, a plurality of T-shaped grooves arranged at the upper ends of the four side walls of the hollow square pipe, a second T-shaped block arranged in the T-shaped grooves, a first push plate and a second push plate and a third push plate and a fourth push plate which are simultaneously fixedly arranged on the second T-shaped block at the same side wall of the hollow square pipe, a fifth spring with one end fixedly arranged on the second T-shaped, The steel wire rope fixing device comprises a plurality of convex plates, a first roller, a second roller, a third roller, a steel wire rope, a long rod and an extrusion roller, wherein the convex plates are respectively fixedly arranged on a first push plate, a second push plate, a third push plate and a fourth push plate; the elastic force of the fourth spring is greater than that of the fifth spring; the long rod is rotated clockwise, the steel wire rope wound on the long rod moves towards one direction, the plurality of sliding blocks are connected through the steel wire rope, so that the plurality of sliding blocks move towards one direction along the direction of the first T-shaped block, the first guide rod, the second guide rod and the inclined block on the sliding blocks move along with the first T-shaped block, the inclined block moves to the convex plate, the elastic force of the fourth spring is greater than that of the fifth spring, so that the first push plate, the second push plate, the third push plate and the fourth push plate move towards the outer side of the hollow square pipe respectively, the first push plate, the second push plate, the third push plate and the fourth push plate are contacted with the inner wall of the opening to complete fixation, the fixation adaptability of the fourth spring is improved, the fourth spring pushes the first push plate, the second push plate, the third push plate and the fourth push plate to ensure that the fixation is convenient and rapid, and the steel wire rope forms a rectangle through the arrangement of the first, make wire rope remove in-process slider receive the power of first T type piece direction to can stimulate a plurality of sliders to remove, through the setting up of squeeze roll make better with the stock contact of wire rope, thereby it is fixed to avoid sliding between stock and the wire rope to influence, can also avoid the slider to remove once more after the assigned position simultaneously, accomplish the fixed back slider removal of check valve promptly, avoid causing its fixed insecure.
The invention has the following advantages: on the premise of not increasing installation space and electrical control and under the condition that the fan is not started, the backflow of outdoor air to the indoor space is prevented, and indoor and outdoor air exchange is isolated; the check valve is very convenient to install, can be embedded in a hole formed in the basis of the roof blower, does not need extra installation space, is higher in reliability and safety due to no intervention in the aspect of electricity, reduces the management cost and the manufacturing cost, and has no very high market prospect.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a side view of the first embodiment of the present invention.
Fig. 3 is a sectional view taken along line B-B of fig. 2.
Fig. 4 is an enlarged view of a portion a in fig. 3.
FIG. 5 is a second side view of the present invention.
Fig. 6 is a sectional view taken along line a-a of fig. 5.
Fig. 7 is an enlarged view of fig. 6 at B.
Fig. 8 is a sectional view taken along line C-C of fig. 3.
Fig. 9 is a top view of the present invention.
Fig. 10 is an enlarged view of fig. 9 at C.
Fig. 11 is a usage state diagram of air blowing into a room.
Fig. 12 is a view showing a state of use of the outdoor discharge air.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in FIGS. 1 to 12, a check valve for a roof fan, which is easy to control, comprises a square hollow tube 1, a fixing device 2 disposed at the upper and lower ends of the square hollow tube, and a sealing device 3 disposed in the square hollow tube for isolating the air exchange between the indoor and outdoor sides, wherein the sealing device 3 comprises a first sealing stopper 31 and a second sealing stopper 32 fixedly disposed on the inner wall of the square hollow tube, a first shaft bracket 33 and a second shaft bracket 34 fixedly disposed on the inner wall of the square hollow tube, a plurality of rotating shafts 35 rotatably disposed on the first shaft bracket and the second shaft bracket, a plurality of eccentric blades 36 fixedly disposed on the rotating shafts, a plurality of first connecting pieces 37 and second connecting pieces 38 fixedly disposed on the short sides of the plurality of eccentric blades, a stopper rod 39 fixedly disposed on the inner wall of the square hollow tube, a first connecting rod 310 rotatably disposed with the plurality of first connecting pieces, and a second connecting rod 311 rotatably disposed with the plurality of second connecting pieces, A first adjusting block 312 arranged in the middle of the first connecting rod, and a second adjusting block 313 arranged in the middle of the second connecting rod; when the roof blower is not operated, the short side weight of the eccentric blade is applied by a first connecting rod and a second connecting rod as well as a first adjusting block and a second adjusting block, the weight of the short side of the eccentric blade is greater than that of the long side, and the blade is closed by utilizing a lever principle; when the roof blower blows air to the indoor, because the pressure generated by the blower is applied to the eccentric blade, the long-side pressure of the eccentric blade is larger than the short-side pressure, when a certain pressure difference exists, the long-side pressure of the eccentric blade overcomes the gravity of the short side, so that the eccentric blade rotates around the axis of the rotating shaft, and even if the eccentric blade is opened, the opening pressure can be adjusted through the first adjusting block and the second adjusting block; the first sealing baffle and the second sealing baffle seal the eccentric blade at the head end and the eccentric blade at the tail end and limit the eccentric blades at the tail end at the same time, so that the eccentric blades are horizontally arranged in a closed state; the opening angle of the eccentric blade can be limited by the fixed position of the stop lever; by the aid of the air conditioner, on the premise that installation space and electric control are not increased, outdoor air is prevented from flowing back indoors under the condition that the fan is not started, and indoor and outdoor air exchange is isolated; the check valve is very convenient to install, can be embedded in a hole formed in the basis of the roof blower, does not need extra installation space, is higher in reliability and safety due to no intervention in the aspect of electricity, reduces the management cost and the manufacturing cost, and has no very high market prospect.
The sealing device 3 further comprises a first fixing block 314 fixedly arranged on the first connecting sheet, a second fixing block 315 fixedly arranged on the second connecting sheet, a first rod 316 fixedly arranged on the first fixing block, a second rod 317 fixedly arranged on the second fixing block, a first spring 318 fixedly arranged at the upper end of the first rod and at the other end on the first fixing block, a second spring 319 fixedly arranged at the upper end of the second rod and at the other end on the second fixing block, a first magnet 320 and a second magnet 321 respectively fixedly arranged on the first adjusting block and the second adjusting block, a third magnet 322 and a fourth magnet 323 respectively matched with the first magnet and the second magnet and fixedly arranged on the inner wall of the hollow square tube, a plurality of first grooves arranged on the end face of the third magnet, and a plurality of second grooves arranged on the end face of the fourth magnet; the first connecting piece is provided with a first fixed block, the second connecting piece is provided with a second fixed block, the first fixed block is provided with a first rod, the first spring and the second fixed block are provided with a second rod and a second spring, when the eccentric blade is closed, the first fixed block and the second fixed block are respectively contacted with the upper end surfaces of the first shaft bracket and the second shaft bracket, the eccentric blade is limited again, the first rod on the first fixed block is firstly contacted with the first shaft bracket through the arrangement of the first rod and the second rod, the second rod on the second fixed block is firstly contacted with the second shaft bracket, the first rod and the second rod move, and then the first spring and the second spring play a role in damping the first rod and the second rod, the damping device has a damping effect on the closed eccentric blade, and can effectively avoid the deformation of the eccentric blade caused by overlarge stress in the closing process of the eccentric blade, thereby avoiding the influence on sealing after the deformation of the eccentric blade; the first magnet is arranged on the first adjusting block, the second magnet is arranged on the second adjusting block, the third magnet and the fourth magnet are arranged on the inner wall of the hollow square tube, so that in the opening process of the eccentric blade, the first magnet and the third magnet generate attraction force with each other, the second magnet and the fourth magnet generate attraction force with each other, thereby be convenient for eccentric blade open, through the aforesaid setting up forced draught blower adjustment wind-force size in-process, make eccentric blade remain the open mode throughout, the forced draught blower is closed through a plurality of first recesses on the third magnet terminal surface and a plurality of second recesses on the fourth magnet terminal surface, make first magnet and third magnet area of contact reduce, make second magnet and fourth magnet area of contact reduce, rethread first adjusting block and second adjusting block make break away from between first magnet and the third magnet and second magnet and break away from with fourth magnet, simultaneously above-mentioned setting can play the effect of delaying to close to eccentric blade.
The sealing device 3 further comprises a plurality of turning plates 326 which are arranged on one long side of the eccentric blade and can be turned upwards, a plurality of arc-shaped guide rails 327 which penetrate through the turning plates and are fixedly arranged on the eccentric blade, a third spring 328 which is fixedly arranged on the eccentric blade and is sleeved on the arc-shaped guide rails at the other end, a plurality of rollers 329 which are positioned on the inner wall of the hollow square tube at the two ends of the turning plates and are rotatably arranged on the inner wall of the hollow square tube, a plurality of eccentric air deflectors 330 which are positioned above the eccentric blade and are rotatably arranged on the inner wall of the hollow square tube, limiting grooves 331 which are arranged on the two sides of the eccentric air deflectors and are arranged on the inner wall of the hollow square tube, limiting rods 332 which are fixedly arranged on the two sides of the eccentric air deflectors and are arranged in the limiting grooves, a plurality of special-shaped air deflector groups which are positioned below the eccentric blade and, the first profiled plate 333 comprises a first arc-shaped section 335, a second arc-shaped section 336 and a vertical section 337; when the eccentric blades are opened, the plurality of turning plates on the eccentric blades are turned over through the third springs, so that the resistance of the surfaces of the eccentric blades is improved in the process of supplying air to the indoor space, the eccentric blades are opened more easily, the turning plates on the eccentric blades are contacted with the rollers when the eccentric blades are closed, the turning plates are closed through the extrusion of the rollers, the rollers are rotatably arranged on the hollow square tubes, the rollers are positioned on the surfaces of the turning plates to roll in the process of extruding the turning plates through the rollers, and the friction between the rollers and the; wind acts on the eccentric blade in the process of supplying air to the indoor, partial wind acts on the eccentric air deflector, namely a downward conical air supply channel is formed between the eccentric air deflector and the eccentric blade, and respectively supplies reverse acting force to the eccentric air deflector and the eccentric blade to rotate, the rotating angle of the eccentric air deflector is controlled by a limiting groove and a limiting rod, so that the pressure difference of the eccentric blade is improved, the eccentric blade is easier to open, the turning plate is also opened in the opening process of the eccentric blade, partial wind is supplied to the indoor through the opening position of the turning plate, the clockwise thrust of the wind on the eccentric blade by the side edge is counteracted, the eccentric blade is better kept in the opening state, the wind direction of the wind supplied to the indoor is changed through the arrangement of a plurality of groups of special-shaped air deflector groups, the wind speed between the first special-shaped plate and the second special-shaped plate is accelerated through the arrangement of the first special-shaped, the wind speed on the surface of the eccentric blade is accelerated, so that more wind energy can act on the eccentric blade, the eccentric blade is kept in a maximum opening state in the air supply adjusting process, the resistance force applied in the air supply process is reduced, the wind direction below the eccentric blade is changed through the first arc-shaped section and the second arc-shaped section, a vortex is formed between the first arc-shaped section and the second arc-shaped section on the second special-shaped plate and the eccentric blade, the suction force in the anticlockwise direction is generated on the eccentric blade through the first arc-shaped section and the second arc-shaped section on the first special-shaped plate in a similar way, and the wind energy which is most always sent into a room can be vertically downward through the arrangement of the vertical section; in the process of exhausting air to the outdoor, firstly, air is supplied to the indoor to open the eccentric blade, then the extension tooth of the eccentric blade is closed, the air supply direction is changed, the indoor air is exhausted to the outdoor, an upward conical air supply channel is formed between the eccentric air deflector and the eccentric blade, and the eccentric blade is kept in an open state, the turning plate is arranged to gather wind and improve resistance to wind acting on the eccentric blade, the wind power anticlockwise borne by the eccentric blade is improved, partial wind passes through the opening at the turning plate to offset the clockwise force of the wind at the side edge of the eccentric blade, the wind power above the first arc-shaped section and the second arc-shaped section on the second special-shaped plate is reduced, the wind power below the eccentric blade, namely the clockwise wind power to the eccentric blade, is obliquely upward in the air exhaust process through the first arc-shaped section on the first special-shaped plate, so that the anticlockwise wind power to the eccentric blade is improved; through the arrangement, the check valve can be sealed, bidirectional air supply can be realized, and the opening of the check valve is not influenced by the size of the air supply; because the electric intervention is not needed, the reliability and the safety are higher, the management cost and the manufacturing cost are reduced, and the market prospect is not very high.
The fixing device 2 comprises a first fixing component 21 arranged at the upper end of the hollow square pipe and a second fixing component 22 arranged at the lower end of the hollow square pipe, the first fixing component structure is the same as the second fixing component structure, the first fixing component 21 comprises four first T-shaped blocks 211 fixedly arranged at the upper ends of four side walls of the hollow square pipe, a plurality of sliding blocks 212 slidably arranged on the first T-shaped blocks, a first guide column 213 and a second guide column 214 fixedly arranged on the sliding blocks, an inclined block 215 simultaneously sleeved on the first guide column and the second guide column, a fourth spring 216 fixedly arranged at the other end of the sliding blocks, a plurality of T-shaped grooves 217 arranged at the upper ends of the side walls of the hollow square pipe, a second T-shaped block 218 arranged in the T-shaped grooves, a first push plate 219, a second push plate 220, a third push plate 221 and a fourth push plate 222, a third push plate 220, a fourth push plate 222 and a third push plate 220, A fifth spring 223 with one end fixed on the second T-shaped block and the other end fixed on the inner wall of the hollow square tube, a plurality of convex plates 224 fixed on the first push plate, the second push plate, the third push plate and the fourth push plate respectively, a first roller 225, a second roller 226 and a third roller 227 rotatably arranged at the corner of the hollow square tube, a steel wire rope 228 used for connecting a plurality of sliding blocks and respectively wound on the first roller, the second roller and the third roller, a long rod 229 positioned at the corner of the hollow square tube and penetrating through the side wall of the hollow steel tube, and an extrusion roller 230 positioned at one side of the long rod and rotatably arranged on the hollow square tube, wherein part of the steel wire rope is wound on the long rod, and the part of the steel wire rope on the second; the elastic force of the fourth spring is greater than that of the fifth spring; the long rod is rotated clockwise, the steel wire rope wound on the long rod moves towards one direction, the plurality of sliding blocks are connected through the steel wire rope, so that the plurality of sliding blocks move towards one direction along the direction of the first T-shaped block, the first guide rod, the second guide rod and the inclined block on the sliding blocks move along with the first T-shaped block, the inclined block moves to the convex plate, the elastic force of the fourth spring is greater than that of the fifth spring, so that the first push plate, the second push plate, the third push plate and the fourth push plate move towards the outer side of the hollow square pipe respectively, the first push plate, the second push plate, the third push plate and the fourth push plate are contacted with the inner wall of the opening to complete fixation, the fixation adaptability of the fourth spring is improved, the fourth spring pushes the first push plate, the second push plate, the third push plate and the fourth push plate to ensure that the fixation is convenient and rapid, and the steel wire rope forms a rectangle through the arrangement of the first, the sliding blocks are subjected to the force in the direction of the first T-shaped block in the moving process of the steel wire rope, so that the sliding blocks can be pulled to move, the steel wire rope is better contacted with the long rod through the arrangement of the extrusion roller, the long rod and the steel wire rope are prevented from sliding to influence the fixation, and meanwhile, the sliding blocks can be prevented from moving again after being moved to the specified position, namely the sliding blocks move after the check valve is fixed, and the infirm fixation of the check valve is avoided; the long rod is rotated anticlockwise, so that the sliding block moves reversely, even if the inclined block is separated from the convex plate, the first push plate, the second push plate, the third push plate and the fourth push plate can return to the original positions through the arrangement of the fifth spring, the next installation is facilitated, and the convenience in installation and disassembly is achieved; the upper end and the lower end of the hollow square tube are fixed through the first fixing component and the second fixing component respectively, so that the fixing is firmer, and the upper end and the lower end of the hollow square tube are fixed synchronously.
Claims (2)
1. A check valve convenient to control for a roof fan is characterized in that: including hollow square pipe (1), locate fixing device (2) at both ends about hollow square pipe, locate sealing device (3) that hollow square intraductal being used for isolated indoor outer air exchange, sealing device (3) are including fixed first sealed fender (31) and the second sealed fender (32) of locating on the relative inner wall of hollow square pipe, fixed first axle of locating on the other relative inner wall of hollow square pipe drags (33) and second axle drag (34), both ends are rotated respectively and are located first axle drag and second axle drag on a plurality of pivots (35), fixed a plurality of eccentric blades (36) of locating in a plurality of pivots, fixed a plurality of first connecting piece (37) and the second connecting piece (38) of locating a plurality of eccentric blade weak sides, fixed shelves pole (39) of locating on the inner wall of hollow square pipe, simultaneously with the rotatable first connecting rod (310) that sets up of a plurality of first connecting pieces, simultaneously with the rotatable second connecting rod (311) that sets up of a plurality of second connecting piece, A first adjusting block (312) arranged in the middle of the first connecting rod and a second adjusting block (313) arranged in the middle of the second connecting rod; the sealing device (3) also comprises a first fixed block (314) fixedly arranged on the first connecting sheet, a second fixed block (315) fixedly arranged on the second connecting sheet, a first rod (316) arranged on the first fixed block in a penetrating way, a second rod (317) arranged on the second fixed block in a penetrating way, and a first spring (318) with one end fixedly arranged at the upper end of the first rod and the other end fixedly arranged on the first fixed block, a second spring (319) with one end fixedly arranged at the upper end of the second rod and the other end fixedly arranged on the second fixed block, a first magnet (320) and a second magnet (321) which are respectively fixedly arranged on the first adjusting block and the second adjusting block, a third magnet (322) and a fourth magnet (323) which are fixedly arranged on the inner wall of the hollow square tube and are respectively used for matching the first magnet and the second magnet, a plurality of first grooves arranged on the end surface of the third magnet, and a plurality of second grooves arranged on the end surface of the fourth magnet; the sealing device (3) also comprises a plurality of turning plates (326) which are arranged on one long side of the eccentric blade and can be turned upwards, a plurality of arc-shaped guide rails (327) which penetrate through the turning plates and are fixedly arranged on the eccentric blade, a third spring (328) with one end fixedly arranged on the eccentric blade and the other end fixedly arranged on the turning plates and sleeved on the arc-shaped guide rails, a plurality of rollers (329) which are positioned at the two ends of the turning plates and are rotatably arranged on the inner wall of the hollow square tube, a plurality of eccentric air deflectors (330) which are positioned above the eccentric blade and are rotatably arranged on the inner wall of the hollow square tube, a limiting groove (331) which is arranged on one side of the eccentric air deflectors and is arranged on the inner wall of the hollow square tube, a limiting rod (332) which is fixedly arranged on one side of the eccentric air deflectors and is arranged in the limiting groove, a plurality of special, the first special-shaped plate and the second special-shaped plate are identical in structure, and the first special-shaped plate (333) comprises a first arc-shaped section (335), a second arc-shaped section (336) and a vertical section (337).
2. A roof fan control valve as claimed in claim 1, wherein: fixing device (2) including locating first fixed subassembly (21) of hollow side pipe upper end, locating the fixed subassembly (22) of second of hollow side pipe lower extreme, first fixed subassembly structure is the same with the fixed subassembly structure of second, first fixed subassembly (21) is including fixed four first T type pieces (211) of locating hollow side pipe four lateral walls upper ends, a plurality of sliders (212) on first T type piece are located in the slidable, fixed first guide post (213) and second guide post (214) of locating on the slider, simultaneously the cover is located sloping block (215) on first guide post and the second guide post, one end is fixed and is located on the slider on the other end fixed fourth spring (216) of locating on the sloping block, locate a plurality of T type grooves (217) of hollow side pipe four lateral walls upper ends, locate second T type piece (218) of T type inslot, simultaneously fixed first push pedal (219) and second push pedal (220) and third push pedal (221) of locating on the same lateral wall second T type piece of hollow side pipe ) A fourth push plate (222), a fifth spring (223) with one end fixed on the second T-shaped block and the other end fixed on the inner wall of the hollow square tube, a plurality of convex plates (224) respectively fixed on the first push plate, the second push plate, the third push plate and the fourth push plate, a first roller (225), a second roller (226) and a third roller (227) rotatably arranged at the corner of the hollow square tube, a steel wire rope (228) used for connecting a plurality of sliding blocks and respectively wound on the first roller, the second roller and the third roller, a long rod (229) positioned at the corner of the hollow square tube and penetrating through the side wall of the hollow steel tube, and an extrusion roller (230) positioned on one side of the long rod and rotatably arranged on the hollow square tube, wherein part of the steel wire rope is wound on the long rod, and part of the steel wire; the elastic force of the fourth spring is greater than that of the fifth spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195002.6A CN111396346B (en) | 2020-03-19 | 2020-03-19 | Check valve convenient to control for roof type fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195002.6A CN111396346B (en) | 2020-03-19 | 2020-03-19 | Check valve convenient to control for roof type fan |
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| CN111396346A CN111396346A (en) | 2020-07-10 |
| CN111396346B true CN111396346B (en) | 2021-02-19 |
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| CN202010195002.6A Active CN111396346B (en) | 2020-03-19 | 2020-03-19 | Check valve convenient to control for roof type fan |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113365481B (en) * | 2021-06-29 | 2023-04-28 | 西安易朴通讯技术有限公司 | Backflow prevention method and device applied to heat dissipation equipment and heat dissipation system |
| CN113685372A (en) * | 2021-08-30 | 2021-11-23 | 华能山东石岛湾核电有限公司 | Non-return device of fan export and have its fan |
| CN116592433B (en) * | 2023-04-18 | 2023-11-03 | 华卓制冷设备(江苏)有限公司 | Dehumidification type roof machine with heat recovery function |
| CN117175369B (en) * | 2023-09-13 | 2024-03-19 | 浙江衢能电气有限公司 | Waterproof high-low voltage switchgear device of intelligence heat dissipation |
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| CN111396346A (en) | 2020-07-10 |
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Address after: 1818 Renmin West Road, Dongguan Street, Shangyu District, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Shangfeng high tech special wind industry Co.,Ltd. Address before: 1818 Renmin West Road, Dongguan Street, Shangyu District, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SHANGFENG HI-TECH SPECIALIZED WIND INDUSTRIAL Co.,Ltd. |