CN114458610A - Double-layer stacked nuclear-grade axial flow fan - Google Patents

Abstract

The invention discloses a double-layer stacked nuclear-grade axial flow fan which comprises a main body, an anti-seismic base, an anti-seismic device, an air duct, a motor support, a motor, an impeller, a lower anti-seismic support and an upper anti-seismic support, wherein the main body is provided with a plurality of air ducts; the anti-seismic device comprises a fixed support, a lower fixed ring, an upper fixed ring, a threaded hole, a bolt, a rotating block, a tensioning mechanism and an anti-seismic mechanism; the fan main body is made of carbon steel or stainless steel, the double-layer stacked nuclear-grade axial flow is arranged on a motor by a fan impeller, and the motor is a power output source of the fan and is doubly fixed on an air duct by a motor bracket and a motor mounting flange; the draught fan is arranged on the lower anti-seismic support and the upper anti-seismic support through the anti-seismic base, and the lower anti-seismic support and the upper anti-seismic support are welded to the floor slab and the embedded plate on the ground up and down; the two fans are installed in a mode of vertically stacking the anti-seismic support, so that the requirement of site space arrangement is met, and the anti-seismic requirement of 11.9g is met.

Description

Double-layer stacked nuclear-grade axial flow fan

Technical Field

The invention belongs to the technical field of nuclear-grade axial flow fans, and particularly relates to a double-layer stacked nuclear-grade axial flow fan.

Background

With the rapid construction and development of nuclear power technology in China, the arrangement of a nuclear power ventilator system is more complex, the requirement on earthquake resistance is continuously improved and limited by installation space, and the structure and the arrangement of a conventional axial flow fan cannot meet the requirement of a new ventilation system; the conventional axial flow fan cannot meet the requirement of earthquake resistance and the requirement of operability of Hualong I equipment after the earthquake; and the nuclear power plant requires the design service life of the fan to be 60 years.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the double-layer stacked nuclear-grade axial flow fan which is reasonable in design, compact in structure, excellent in anti-seismic performance, high in efficiency and longer in service life.

In order to achieve the purpose, the invention adopts the following technical scheme: a double-layer stacked nuclear-grade axial flow fan comprises an air duct, a motor, an impeller, a motor support, an upper anti-seismic support, a lower anti-seismic support and an anti-seismic base;

the impeller comprises blades, a hub and a flow guide cover, wherein the blade wing-shaped structure is fixed with the hub by adopting a reinforcing flange, parameters are adjustable, and the vibration resistance and the pneumatic performance are ensured by matching the flow guide cover;

the motor is fixed by adopting double supports (B5+ B30), and the motor flange and the motor bracket are fixed doubly, so that the running stability of the fan is ensured, the vibration of the fan is reduced, and the anti-seismic performance of the fan is improved;

the air duct comprises a duct body, a surge ring and a stationary blade assembly, wherein the duct body is formed by assembling and welding high-strength steel by adopting a multi-edge rib reinforcing structure and is provided with an access door; the fixed blade assembly comprises a mounting flange, an inner cylinder and a fixed blade support, the inner cylinder is of a cylindrical structure, and the fixed blade support and the cylinder are welded into a whole, so that the pneumatic performance of the fan is improved, the rigidity of the air cylinder is improved, and the anti-seismic performance of the fan is ensured;

the upper anti-seismic support and the lower anti-seismic support are of section steel and multi-edge rib structures, the reinforced section steel is arranged in a rhombic net structure, the mounting base plate is a thickened high-strength steel plate, the two nuclear-grade anti-seismic axial flow fans are mounted in the upper anti-seismic support and the lower anti-seismic support through anti-seismic bases, the anti-seismic supports are subjected to modal mechanical analysis calculation, the strength and the rigidity of the supports are guaranteed, and anti-seismic requirements are met.

The anti-seismic device comprises a plurality of fixed supports arranged on the anti-seismic base, a lower fixing ring arranged on the fixed supports, an upper fixing ring arranged on the lower fixing ring, threaded holes respectively arranged on the lower fixing ring and the upper fixing ring, bolts arranged in the threaded holes, a rotating block arranged in the lower fixing ring, a tensioning mechanism arranged in the rotating block and a shockproof mechanism arranged in one of the fixed supports.

Erecting an air duct on a lower fixing ring, sleeving an upper fixing ring, and screwing a bolt into a threaded hole; the air duct is installed and fixed; when the anti-vibration bolt starts to work, the tensioning mechanism is continuously driven to operate under the action of the anti-vibration mechanism, and then the bolt is tensioned; the lower fixing ring and the upper fixing ring are arranged to adapt to air ducts with different calibers, so that the adaptability of the equipment is improved, and the air duct fixing device can adapt to different scenes; the installation can be conveniently and quickly realized through the arrangement of the bolts, so that the practicability of the equipment is improved.

The tensioning mechanism comprises a tensioning groove arranged in the bolt, a sector groove arranged on the inner wall of the tensioning groove, a tensioning spring arranged at the upper end of the rotating block, a rotating groove arranged on the rotating block, a moving groove arranged in rotation, a tensioning block arranged at one end of the moving groove, a reset spring arranged on the tensioning block, a spiral groove arranged in the rotating groove, a piston block arranged at the other end of the moving groove, a piston spring arranged at the bottom of the piston block, a limit pipe arranged on the rotating block, a limit groove arranged in the limit pipe, a first limit block arranged in the limit groove, a second limit block arranged on the tensioning block, an unlocking block arranged in the limit pipe, an unlocking spring arranged on the unlocking block, a pressure rod arranged at the upper end of the limit pipe, a butt joint ball arranged on the side wall of the pressure rod, a butt joint groove arranged on the inner wall of the limit pipe, The pneumatic tube is arranged on the fixed support, the piston rod is arranged at the upper end of the pneumatic tube, and the embedded block is arranged on the piston rod; the tensioning groove is formed in the bolt; the fan-shaped grooves are uniformly arranged on the inner wall of the tensioning groove along the circumferential direction of the tensioning groove; the tensioning block is movably arranged in the moving groove; the spiral groove is spiral and is arranged in the rotary groove.

When the bolt is tightened, the tensioning spring is pressed against the inner upper wall of the tensioning groove; meanwhile, the piston block can compress the air pressure in the moving groove, and when the bolt is slowly screwed down, the piston block can drive the pressure rod to move and then drive the unlocking block in the limiting pipe to move; then the first limiting block is driven to move downwards, and the second limiting block is pushed out of the limiting groove; at the moment, the tensioning block moves under the action of air pressure, enters the fan-shaped groove and is positioned in the middle of the fan-shaped groove; when the bolt is screwed down, the butt joint ball is clamped into the butt joint groove; when the shockproof mechanism is started, intermittent pressurization is carried out in the air pressure pipe to drive the piston rod to move, then the embedded block is meshed with the thread groove to drive the rotating block to intermittently rotate for a certain angle, then the air pressure is slowly relieved through the pressure relief hole in the intermittent block, at the moment, the tensioning block can abut against the inner wall of the fan-shaped groove, and the bolt is always tensioned when rotating; the tension spring can resist the reverse force of the bolt, so that the bolt can be effectively prevented from loosening; the tightness of the bolts is improved, and the stability of the fan on the main body is further improved; when the equipment starts to operate, the generated vibration can enable the bolt to rotate so as to loosen; at the moment, the distance between the fan-shaped groove and the tensioning block is changed; then the piston rod is driven to intermittently move, so that the rotating block is driven to rotate; the inner wall of the fan-shaped groove can be automatically pressed when the equipment runs, so that the bolt is driven to rotate and be screwed; the tightness of the bolts is effectively improved, and the air duct is prevented from being misplaced, so that the equipment is not stable in operation; when the bolt is screwed, the limiting block is clamped in the limiting groove, so that the tensioning block is prevented from moving in advance to collide with the bolt, and the stability is improved; the arrangement of the pressure lever realizes the unlocking of the driving limiting block when the bolt is about to be screwed down, and ensures that the tensioning block can smoothly enter the fan-shaped groove; when the bolts are screwed down, the sound of the ball catching clamp entering the butting groove can remind workers, and each bolt is ensured to be under the same tensioning force; the stability of dryer has been improved.

The shockproof mechanism comprises an arc groove arranged on the fixed support, a telescopic groove arranged on the arc groove, a shockproof block arranged in the telescopic groove, an air pipe arranged in the shockproof block, a first connecting rod arranged at one end of the air pipe, a second connecting rod arranged in the first connecting rod, a moving cavity in the shockproof block, a shockproof spring arranged at the bottom of the shockproof block, a piston plate arranged in the moving cavity, a second piston spring arranged on the piston plate, a butt-joint tooth block arranged on the fixed support, embedded teeth arranged at the bottom of the lower fixed ring, a butt-joint spring arranged on the butt-joint tooth block, a telescopic pipe arranged on the fixed support, a driving structure arranged on the inner wall of the telescopic pipe and a shockproof structure arranged at the bottom of the fixed support; the longitudinal section of the arc groove is arc-shaped and is arranged on the fixed bracket; the telescopic groove is formed in the arc groove; one end of the shockproof block is fixedly arranged at the bottom of the lower fixing ring, and the other end of the shockproof block is arranged at one end of the pneumatic tube in a telescopic manner; the shockproof block is positioned in the telescopic groove; one end of the first connecting rod is arranged at one end of the air pipe in a universal rotating manner; the first connecting rod is a hollow pipe; one end of the second connecting rod is arranged in the first connecting rod in a telescopic mode, and the other end of the second connecting rod is arranged on the inner wall of the telescopic groove in a universal rotating mode; and two adjacent second connecting rods are arranged in a vertically staggered manner.

When the equipment starts to operate, the air duct can vibrate under the influence of the motor and external factors; when the shock absorber vibrates, the lower fixing ring drives the shock-proof block to irregularly rock; when the shockproof block shakes left, right, front and back, the first connecting rod can be driven to stretch and retract in the second connecting rod; the air pressure generated in the air pipe drives the piston plate to move; then the air pressure in the air pressure pipe is increased to drive the piston rod to start moving; when the vibration is strengthened, the driving structure can drive the butt-joint tooth blocks to move and be meshed with the embedded teeth, and then the lower fixing ring is connected with the fixing support; the shockproof structure starts to further absorb shock; the lower fixing ring can move in a space due to the arrangement of the arc groove, so that the lower fixing ring is prevented from colliding with the anti-seismic base due to vibration, and the stability of the equipment is further improved; the arrangement of the first connecting rod and the second connecting rod realizes automatic extension and retraction when the shockproof block is shocked, and on one hand, the shockproof block can be buffered, so that the lower fixing ring starts the shock absorption effect; on the other hand, the pneumatic pressure can be generated to drive the piston plate to move, so that the shockproof block can drive the piston plate to move regardless of the direction from which the shockproof block shakes, and the piston rod is further moved; the bolt tightening stability is improved, and the equipment stability is further improved; the piston plate is arranged to enable the air pressure cavity to generate air pressure, and meanwhile, the piston plate and the shockproof block can be separated to generate air pressure for the air pressure cavity, so that no matter how the lower fixing ring shakes, air pressure can be generated in the air pressure pipe, and the moving stability of the piston rod is improved; the butt joint can be realized under the condition of large vibration through the arrangement of the butt joint tooth block and the embedded teeth; therefore, the lower fixing ring can be combined with the fixing support, on one hand, the first connecting rod and the second connecting rod can be prevented from being damaged due to collision caused by overlarge vibration, and the safety is improved; on the other hand, the shock absorption structure can be combined to start further shock absorption, and the shock absorption effect of the equipment is improved.

The driving structure comprises a telescopic rod arranged in the telescopic pipe, two thread blocks arranged on the telescopic rod, a rotating cavity arranged on the inner wall of the telescopic pipe, a thread ring arranged in the rotating cavity, a rotating ring arranged in the rotating cavity, a single bearing for connecting the rotating ring and the thread ring, a reset torsion spring arranged on the rotating ring, a ratchet wheel arranged on the side edge of the rotating ring, a first driving pipe for communicating the rotating cavity with an air pressure pipe, a ratchet block arranged at one end of the first driving pipe, a second driving pipe arranged at the other end of the first driving pipe, a trapezoid block connected with the air pressure pipe and the rotating cavity, a driving rod arranged at one end of the second driving pipe, a first magnet arranged in the second driving pipe, a limiting gear ring arranged at the bottom of the rotating ring, a limiting gear arranged at the other end of the second driving pipe, a limiting spring arranged at the bottom of the limiting gear, a second magnet arranged at the side edge of the second driving pipe, The resetting component is arranged in the telescopic rod; the telescopic rod is movably arranged in the telescopic pipe and fixedly connected with the butt-joint tooth block; the thread block is movably arranged on the side wall of the telescopic rod, and the outer wall of the thread block is in a thread shape; the rotating cavity is arranged on the inner wall of the telescopic pipe; the threaded ring is rotatably arranged in the rotating cavity and is in threaded connection with the outer wall of the threaded block; the rotating ring is rotatably arranged in the rotating cavity; the single bearing is connected with the rotating ring and the threaded ring; the cross section of the first driving pipe is L-shaped and is communicated with the rotating cavity and the air pressure pipe; the ratchet is movably arranged at one end of the first driving pipe and is abutted against the ratchet gear; the trapezoidal block longitudinal section is trapezoidal, and the mobilizable other end of locating first drive tube.

When the shockproof block moves repeatedly, the pressing trapezoidal block moves, and then the ratchet block is driven to intermittently press the ratchet gear to rotate; at the moment, the reset torsion spring starts to accumulate force; when the vibration is increased, the shockproof block can be abutted against the driving rod to drive the first magnet to move, and then the limiting teeth are separated from the limiting toothed ring; at the moment, the reset torsion spring starts to drive the rotating ring to rotate, and the thread block is driven to move upwards; then driving the butt joint tooth block to move; the amplitude of the vibration can influence the moving stroke of the shockproof block, so that the shockproof block can be abutted against the driving rod after the vibration is increased; thereby driving the rotating ring to rotate and further driving the threaded ring to rotate; then the screw thread block can be driven to move upwards, so that the shockproof mode is more stable, and the shockproof stability of the equipment is improved; the damping mode can be freely switched through the structure, so that the anti-vibration effect of the equipment is improved; and meanwhile, the adaptability of the equipment is improved.

The reset assembly comprises a reset cavity arranged in the telescopic rod, a reset groove arranged in the telescopic rod, a reset block arranged on the inner wall of the thread block, a T-shaped block arranged at the bottom of the reset cavity, a T-shaped spring arranged on the T-shaped block, a second magnet arranged at the bottom of the reset groove, a magnet spring arranged on the second magnet, a first pull rope arranged at the bottom of the T-shaped block, a positioning groove arranged on the inner wall of the thread block, a pressure resisting rod arranged at the bottom of the telescopic rod, a positioning buckle arranged at the upper end of the pressure resisting rod and a pressure resisting spring arranged at the bottom of the pressure resisting rod; the T-shaped block is movably arranged at the bottom of the reset cavity; the T-shaped spring is arranged on the T-shaped block; the second magnet is movably arranged at the bottom of the reset groove and is attracted with the reset block; the magnet spring is arranged on the second magnet; the first pull rope is arranged at the bottom of the T-shaped block; the positioning groove is formed in the inner wall of the thread block, and the cross section of the positioning groove is L-shaped; the pressing rod is movably arranged at the bottom of the telescopic rod; the cross section of the positioning buckle is L-shaped, is arranged at the upper end of the abutting rod and is buckled with the positioning groove; the abutting spring is arranged at the bottom of the abutting rod.

When the vibration amplitude is reduced, the pulling force of the first pull rope on the T-shaped block is reduced; then the screw thread block is driven to abut against the second magnet under the action of the T-shaped spring, and then the second magnet is attracted with the reset block to drive the screw thread block to move and separate from the screw thread ring; then the positioning groove is buckled into the positioning buckle; after the resetting is completed, the pressing rod moves upwards, and then the positioning buckle is separated from the positioning groove; the thread block is meshed with the thread ring again; through the arrangement of the assembly, the thread block and the thread ring can be automatically separated after the vibration amplitude is reduced, so that the vibration mode is automatically switched, the anti-vibration effect is improved, and the anti-vibration adaptability of the equipment is further improved.

The quakeproof structure comprises a universal groove arranged on the quakeproof base, a universal block arranged at the bottom of the universal groove, an air ring arranged on the universal block, a rotating platform arranged at the upper end of the universal block, a buffer groove arranged on the rotating platform, a buffer block arranged in the buffer groove, a buffer spring arranged on the buffer block, a spring block arranged on the buffer spring, a rectangular groove arranged on the inner wall of the buffer groove, and a pull groove arranged in the buffer block, the clamping groove is arranged on the anti-seismic base, an air cavity is arranged at the bottom of the universal block, a clamping block is arranged in the air cavity, a clamping block spring is arranged on the clamping block, a first connecting pipe for connecting the air cavity and the air ring, a second connecting pipe for connecting the air ring and the air pressure pipe, and a second pull rope is arranged on the clamping block; (ii) a The universal block can be arranged in the universal groove in a universal sliding manner; the cross section of the rotating platform is circular and can be rotatably arranged on the universal block; the cross section of the buffer tank is rectangular and is arranged on the rotating table; the buffer block is fixedly arranged at the bottom of the fixed support and is arranged in the chute in a sliding way; the rectangular block is movably arranged in the pull groove and buckled in the rectangular groove; the longitudinal section of the V-shaped rod is V-shaped, and two ends of the V-shaped rod are respectively hinged with the rectangular blocks; and the midpoint is connected with the first pull rope; the clamping groove is formed in the bottom of the universal groove.

After the telescopic rod moves upwards, the first pull rope can pull the V-shaped rod to fold, then the two rectangular blocks are driven to be separated from the rectangular grooves, and meanwhile the clamping blocks are separated from the clamping grooves; at the moment, the universal block can move in a universal direction in the universal groove under the condition of vibration, and the generated inertia drives the rotating platform to rotate; at the moment, the buffer block starts to shake under the action of centrifugal force, and the generated shake is counteracted by the buffer spring; thereby greatly reducing the shaking; the clamping block can be pulled to move when the buffer block moves, then the clamping block generates air pressure in the air cavity to inflate the air ring, and the air cushion is used for further intermittent shock absorption; meanwhile, air pressure in the air ring can enter the air pressure pipe, and the bolt is screwed down again; the universal block and the universal groove can freely move in a universal manner when the equipment shakes, so that the equipment is prevented from being damaged due to overlarge vibration; further shock absorption is facilitated; the device can be damped in an air cushion mode through the arrangement of the air ring, so that the damping effect is improved; the rotation table can freely rotate according to the movement of the universal block, so that the vibration is reduced; meanwhile, the buffer block can be driven to move, and the automatic direction is opposite to the moving direction of the universal block; the shaking is further reduced; the buffer spring can greatly reduce the movement of the buffer block, and the stability is improved; meanwhile, the reset speed of the buffer spring can be reduced through the spring block, so that the reset during vibration is more stable; the stability of shock absorption is improved; the rectangular block can limit the buffer block under the condition of small vibration, so that the stability is improved; because the second connecting pipe aperture is less than first connecting pipe, therefore the gas in the gas ring can exist the certain time, and slow discharge is again, is favorable to gaseous buffering to the fixed bolster like this, has improved the shock attenuation effect.

According to the technical scheme, two large nuclear-grade anti-seismic axial flow fans are stacked up and down, the total height is 5.1m, the weight is 4410kg, and the two large nuclear-grade anti-seismic axial flow fans are fixed up and down; the draught fan meets the requirements that the shock resistance and the vibration value of the maximum acceleration of 11.9g are less than or equal to 2.8mm/s through shock resistance and mechanical operation tests, and completely meets the design requirements of a ventilating system of a Hualongyi diesel generator factory building.

In conclusion, the invention has the following advantages: the fan main body is made of carbon steel or stainless steel, the double-layer stacked nuclear-grade axial flow is arranged on a motor by a fan impeller, and the motor is a power output source of the fan and is doubly fixed on an air duct by a motor bracket and a motor mounting flange; the fan is arranged on the lower anti-seismic support and the upper anti-seismic support through the anti-seismic base, and the lower anti-seismic support and the upper anti-seismic support are welded to the floor slab and the pre-buried plate on the ground from top to bottom; the two fans are installed in a mode of being vertically stacked through the anti-seismic support, so that the requirement of site space arrangement is met, and the anti-seismic requirement of 11.9g is met.

Drawings

FIG. 1 is a first schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the cartridge of the present invention.

Fig. 3 is a second structural schematic diagram of the present invention.

Fig. 4 is a front view of fig. 3 of the present invention.

Fig. 5 is a left side view of fig. 3 of the present invention.

Fig. 6 is a cross-sectional view along a-a of fig. 4 of the present invention.

Fig. 7 is a cross-sectional view taken along B-B of fig. 5 of the present invention.

Fig. 8 is a cross-sectional view taken along C-C of fig. 5 of the present invention.

FIG. 9 is a cross-sectional perspective view along D-D of FIG. 4 of the present invention.

FIG. 10 is a schematic view of the anti-rattle block of the present invention.

FIG. 11 is a partial view taken at A of FIG. 6 in accordance with the present invention.

Fig. 12 is a partial view of fig. 11 at B in accordance with the present invention.

Fig. 13 is a partial view at H of fig. 8 of the present invention.

Fig. 14 is a partial view of the invention at C of fig. 12.

Fig. 15 is a partial view of the invention at D in fig. 11.

Fig. 16 is a partial view of fig. 11 taken at E in accordance with the present invention.

Fig. 17 is a partial view of the invention at F in fig. 9.

Fig. 18 is a partial view of the invention at G in fig. 16.

FIG. 19 is a partial view taken at I of FIG. 11 in accordance with the present invention.

Fig. 20 is a partial view of the invention at J in fig. 7.

In FIGS. 1-2: 1-impeller, 2-upper anti-vibration support, 3-wind barrel, 4-motor, 5-lower anti-vibration support, 6-access door, 7-motor support, 8-anti-vibration base, 9-barrel, 10-stationary blade assembly and 11-inner barrel;

Detailed Description

As shown in fig. 1 and 2, the invention discloses a double-layer stacked nuclear-grade axial flow fan, the main body of the fan is made of carbon steel or stainless steel, the double-layer stacked nuclear-grade axial flow fan is installed on a motor 4 by an impeller 1, the motor 4 is a power output source of the fan, and the double-layer stacked nuclear-grade axial flow fan is doubly fixed on an air duct 3 by a motor bracket 7 and a motor installation flange; the draught fan is arranged on the lower anti-seismic support 5 and the upper anti-seismic support 2 through the anti-seismic base 8, and the lower anti-seismic support 5 and the upper anti-seismic support 2 are welded to the floor slab and the embedded plate on the ground from top to bottom; the two fans adopt an installation form of vertically stacking the anti-seismic supports, so that the requirement of site space arrangement is met, and the anti-seismic requirement is met.

In order to further optimize the structure, the air duct adopts a steel plate butt welding structure, and a plurality of reinforcing flanges and rib plates are arranged outside the air duct, so that the rigidity of the air duct is increased; the guide vane, the inner barrel and the guide impeller flange are arranged in the air barrel, the motor is arranged in the guide impeller of the air barrel, the motor adopts a special structure, the flange end of the motor is arranged on the guide impeller flange, the motor base is fixed on the air barrel through 4 motor supports, and the high-strength bolt is adopted for connection and fastening, so that the overall anti-seismic performance of the fan is improved. The outlet of the air duct is provided with a guide impeller, and the end of the air duct impeller is turned to improve the efficiency and the static pressure ratio of the fan.

The fan anti-seismic base/upper and lower anti-seismic support adopts channel steel as a main body structure, and the channel steel is connected with the air duct foot on the fan barrel through the high-strength bolt, so that the weight of each part of the fan barrel is transmitted to the fan anti-seismic base, and the stability and anti-seismic performance of the fan operation are ensured.

In order to optimize the anti-seismic performance, the motor is fixedly reinforced on the air duct through the four motor supports, and meanwhile, the air duct adopts a multi-edge rib structure, so that the running stability of the fan is ensured, and the anti-seismic performance of the fan is improved.

In a word, the double-layer stacked nuclear-grade axial flow fan can meet the ventilation system of the Hualong I diesel generator factory building, has good anti-seismic performance and pneumatic performance, and meets the requirement of arrangement of a plurality of nuclear-grade anti-seismic fans in a compact space

As shown in fig. 3-20, the anti-vibration wind tunnel comprises a main body, an anti-vibration base 8, an anti-vibration device, a wind tunnel 3, a motor bracket 7, a motor 4, an impeller 1, a lower anti-vibration bracket 5 and an upper anti-vibration bracket 2; the anti-seismic device comprises a fixed support 100, a lower fixing ring 111, an upper fixing ring 12, a threaded hole 13, a bolt 14, a rotating block 15, a tensioning mechanism and an anti-seismic mechanism; the fan main body is made of carbon steel or stainless steel, the fan comprises an impeller 1 and is arranged on a motor 4, the motor 4 is a power output source of the fan, and the fan main body is doubly fixed on an air duct 3 through a motor bracket 7 and a motor mounting flange; the draught fan is arranged on the lower anti-seismic support 5 and the upper anti-seismic support 2 through the anti-seismic base 8, and the lower anti-seismic support 5 and the upper anti-seismic support 2 are welded to the floor slab and the embedded plate welding on the ground from top to bottom; the two fans adopt a mode of stacking the anti-seismic supports up and down, so that the requirement of spatial arrangement is met, and the anti-seismic requirement is met; the motor 4 is fixed by adopting double supports (B5+ B30), and the motor flange and the motor bracket 7 are fixed doubly, so that the running stability of the fan is ensured, the vibration of the fan is reduced, and the anti-seismic performance of the fan is improved; the number of the fixed supports 100 is 4, the fixed supports are fixedly arranged on the anti-seismic base 8 and are positioned at four corners of the anti-seismic base 8; the lower fixing ring 111 is semicircular in longitudinal section and is fixedly arranged on two of the fixing supports 100; the longitudinal section of the upper fixing ring 12 is semicircular and forms a circular ring with the lower fixing ring 111; the threaded holes 13 are formed in two sides of the lower fixing ring 111 and the upper fixing ring 12; the bolt 14 is arranged in the threaded hole 13 and used for connecting the lower fixing ring 111 and the upper fixing ring 12; the rotating block 15 is rotatably disposed on the lower fixing ring 111.

As shown in fig. 11 to 14, the tensioning mechanism includes a tensioning groove 20, a sector groove 21, a tensioning spring 22, a rotating groove 23, a moving groove 24, a tensioning block 25, a return spring 26, a spiral groove 27, a piston block 28, a piston spring 29, a limiting tube 201, a limiting groove 202, a first limiting block 203, a second limiting block 204, an unlocking block 205, an unlocking spring 206, a pressing rod 207, a docking ball 208, a docking groove 209, a pneumatic tube 210, a piston rod 211, and a phase embedding block 212; the tensioning groove 20 is arranged in the bolt 14; a plurality of fan-shaped grooves 21 are uniformly formed in the inner wall of the tensioning groove 20 along the circumferential direction of the tensioning groove 20; the lower end of the tension spring 22 is fixedly arranged at the upper end of the rotating block 15; the rotating groove 23 is formed in the rotating block 15; the moving grooves 24 are arranged on the rotating block 15, and the number of the moving grooves is consistent with that of the fan-shaped grooves 21; the tensioning block 25 is movably arranged in the moving groove 24; the return spring 26 is connected with the tensioning block 25 and the inner wall of the moving groove 24; the spiral groove 27 is spiral and is arranged in the rotary groove 23; the piston block 28 is movably arranged at the other end of the moving groove 24 and is abutted against the upper top of the tensioning groove 20; the piston spring 29 connects the piston block 28 and the moving groove 24; the limiting pipe 201 is arranged in the rotating block 15; the limiting groove 202 is formed in the inner wall of the limiting pipe 201; the longitudinal section of the first limiting block 203 is trapezoidal and is arranged in the limiting groove 202 in a telescopic manner; the second limiting block 204 is telescopically arranged on the tensioning block 25, is buckled in the limiting groove 202 and abuts against the first limiting block 203; the unlocking block 205 is movably arranged in the limiting pipe 201 and is abutted against the first limiting block 203; the pressure lever 207 is movably arranged at the upper end of the limiting pipe 201; the butt-joint ball 208 is telescopically arranged on the inner wall of the pressure lever 207; the butt joint groove 209 is arranged in the limiting pipe 201; the air pressure pipe 210 is arranged in the fixed support 100; the piston rod 211 is arranged at the upper end of the pneumatic tube 210 in a telescopic manner; the embedded block 212 is fixedly arranged at the upper end of the piston rod 211 and is meshed with the spiral groove 27; the phase insert 212 is provided with a pressure relief hole.

As shown in fig. 15, the anti-vibration mechanism includes an arc groove 30, a telescopic groove 31, an anti-vibration block 32, a piston tube 320, a slot 330, an air tube 33, a first link 34, a second link 35, a moving cavity 36, an anti-vibration spring 37, a piston plate 38, a second piston spring 39, a T-shaped block 390, a butt-joint tooth block 301, a mutually-engaged tooth 302, a butt-joint spring 303, a telescopic tube 304, a driving structure, and an anti-vibration structure; the arc groove 30 is arc-shaped in longitudinal section and is arranged on the fixed support 100; the telescopic groove 31 is formed in the arc groove 30; one end of the shockproof block 32 is fixedly arranged at the bottom of the lower fixing ring 111, and the other end is arranged at one end of the pneumatic tube 210 in a telescopic manner; the shockproof block 32 is positioned in the telescopic groove 31; the air pipes 33 are arranged in the anti-vibration block 32 and are uniformly distributed along the circumferential direction of the anti-vibration block 32; one end of the first connecting rod 34 is arranged at one end of the air pipe 33 in a universal rotating manner; the first link 34 is a hollow tube; one end of the second connecting rod 35 is telescopically arranged in the first connecting rod 34, and the other end of the second connecting rod is arranged on the inner wall of the telescopic groove 31 in an universal rotating manner; two adjacent second connecting rods 35 are arranged in a vertically staggered manner; the moving cavity 36 is arranged in the shockproof block 32, and the upper end of the moving cavity is communicated with the air pipe 33; the shockproof spring 37 is connected with the bottom of the shockproof block 32 and the telescopic groove 31; the piston plate 38 is movably arranged in the moving cavity 36; the second piston spring 39 connects the piston plate 38 and the moving chamber 36; the butt-joint tooth block 301 is telescopically arranged on the fixed support 100, and the butt-joint tooth block 301 is movably positioned in the telescopic pipe 304; the embedded teeth 302 are arranged at the bottom of the lower fixing ring 111 and meshed with the butt joint tooth block 301; the extension tube 304 is arranged in the fixed bracket 100; the piston tube 320 is fixedly arranged at the bottom of the shockproof block 32 and is telescopically positioned in the pneumatic tube 210; the slot 330 is annularly arranged at the bottom of the shockproof block 32; the T-block 390 is fixedly mounted on the piston tube 320 and movably disposed in the slot 330.

As shown in fig. 15-17, the driving structure comprises a telescopic rod 40, a thread block 41, a rotating cavity 42, a thread ring 43, a rotating ring 44, a single bearing 45, a reset torsion spring 46, a ratchet wheel 47, a first driving pipe 48, a ratchet block 49, a trapezoidal block 401, a second driving pipe 402, a driving rod 403, a first magnet 404, a limit tooth ring 405, limit teeth 406, a limit spring 407 and a reset assembly; the telescopic rod 40 is movably arranged in the telescopic pipe 304 and fixedly connected with the butt joint tooth block 301; the thread block 41 is movably arranged on the side wall of the telescopic rod 40, and the outer wall of the thread block 41 is in a thread shape; the rotating cavity 42 is arranged on the inner wall of the telescopic pipe 304; the threaded ring 43 is rotatably arranged in the rotating cavity 42 and is in threaded connection with the outer wall of the threaded block 41; the rotating ring 44 is rotatably arranged in the rotating cavity 42; the single bearing 45 connects the rotating ring 44 and the threaded ring 43; the return torsion spring 46 is connected with the rotating ring 44 and the rotating cavity 42; the ratchet gear 47 is fixedly arranged on the outer wall of the rotating ring 44; the cross section of the first driving pipe 48 is L-shaped and is communicated with the rotating cavity 42 and the air pressure pipe 210; the ratchet 49 is movably arranged at one end of the first driving pipe 48 and is abutted against the ratchet gear 47; the trapezoid block 401 is trapezoid in longitudinal section and movably arranged at the other end of the first driving pipe 48; the second driving pipe 402 is connected with the pneumatic pipe 210 and the rotating cavity 42; the driving rod 403 is movably arranged at one end of the second driving pipe 402; the first magnet 404 is slidably disposed in the second driving tube 402 and connected to the second driving tube 402 by a spring; the limiting toothed ring 405 is arranged at the bottom of the rotating ring 44; the limiting teeth 406 are movably arranged at the other end of the second driving pipe 402 and are meshed with the limiting tooth ring 405; the limit teeth 406 are ratchet teeth and can attract the first magnet 404.

As shown in fig. 16 and 18, the reset assembly includes a reset cavity 50, a reset slot 51, a reset block 52, a t-block 53, a t-spring 54, a second magnet 55, a magnet spring 56, a first pull rope 57, a positioning slot 58, a pressing rod 59, a positioning buckle 501, and a pressing spring 502; the reset cavity 50 is arranged in the telescopic rod 40; the reset groove 51 is arranged in the telescopic rod 40 and is positioned above the reset cavity 50; one end of the reset block 52 is fixedly arranged on the thread block 41, and the other end is movably arranged in the reset groove 51; the T-shaped block 53 is movably arranged at the bottom of the reset cavity 50; the T-shaped spring 54 is arranged on the T-shaped block 53; the second magnet 55 is movably arranged at the bottom of the reset groove 51 and attracted with the reset block 52; the magnet spring 56 is arranged on the second magnet 55; the first pull rope 57 is arranged at the bottom of the T-shaped block 53; the positioning groove 58 is formed in the inner wall of the thread block 41, and the cross section of the positioning groove is L-shaped; the pressing rod 59 is movably arranged at the bottom of the telescopic rod 40; the cross section of the positioning buckle 501 is L-shaped, is arranged at the upper end of the abutting rod 50 and is buckled with the positioning groove 58; the abutting spring 502 is arranged at the bottom of the abutting rod 59.

As shown in fig. 19 to 20, the anti-vibration structure includes a universal groove 60, a universal block 61, an air ring 620, a rotating table 62, a buffer groove 63, a buffer block 64, a buffer spring 65, a spring block 66, a rectangular groove 67, a pull groove 68, a rectangular block 69, a V-shaped rod 601, a clamping groove 602, an air cavity 603, a clamping block 604, a clamping block spring 605, a first connecting pipe 606, a second connecting pipe 607, and a second pull rope 608; the universal groove 60 is arranged at the bottom of the anti-seismic base 8; the universal block 61 can be arranged in the universal groove 60 in a universal sliding manner; the air ring 620 is made of rubber and is arranged at the joint of the fixed support 11 and the anti-seismic base 8; the cross section of the rotating platform 62 is circular and is rotatably arranged on the universal block 61; the cross section of the buffer groove 63 is rectangular and is arranged on the rotating table 62; the buffer block 64 is fixedly arranged at the bottom of the fixed bracket 11 and is slidably arranged in the chute 63; the buffer spring 65 is connected with the buffer block 64 and the buffer groove 63; the spring block 66 is arranged on the buffer spring 65; the rectangular groove 67 is formed in the inner wall of the buffer groove 63; the pull groove 68 is arranged in the buffer block 64; the rectangular block 69 is movably arranged in the pull groove 68 and buckled in the rectangular groove 67; the longitudinal section of the V-shaped rod 601 is V-shaped, and two ends of the V-shaped rod are hinged with the rectangular block 69 respectively; and the midpoint is connected with the first pull rope 57; the clamping groove 602 is arranged at the bottom of the universal slot 60; the air cavity 603 is arranged at the bottom of the universal block 61; the clamping block 604 is slidably arranged in the air cavity 603 and is buckled with the clamping groove 602; the fixture block spring 605 is arranged in the fixture block 604; the first connecting pipe 606 is connected with the air cavity 603 and the air ring 620, and a one-way valve is arranged in the first connecting pipe 606; the second connecting pipe 607 is connected with the ring 62 and the pneumatic pipe 210, and a one-way valve is arranged inside the second connecting pipe 607; the second connection pipe 607 has a smaller diameter than the first connection pipe 606; the second pull cord 608 connects the latch 604 to the V-shaped bar 601.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. The utility model provides a double-deck closed assembly nuclear level axial fan which characterized in that: the anti-seismic device comprises a main body, an anti-seismic base (8) arranged on the main body, an anti-seismic device arranged in the anti-seismic base (8), an air duct (3) arranged on the anti-seismic base (8), a motor support (7) arranged on the air duct (3), a motor (4) arranged on the support (7), an impeller (1) arranged on the motor (4), a lower anti-seismic support (5) arranged on the main body and an upper anti-seismic support (2); the anti-seismic device comprises a plurality of fixed supports (100) arranged on the anti-seismic base (8), a lower fixing ring (111) arranged on the fixed supports (100), an upper fixing ring (12) arranged on the lower fixing ring (111), threaded holes (13) respectively arranged at the sides of the lower fixing ring (111) and the upper fixing ring (12), bolts (14) arranged in the threaded holes (13), a rotating block (15) arranged in the lower fixing ring (111), a tensioning mechanism arranged in the rotating block (15) and an anti-seismic mechanism arranged in one of the fixed supports (11); the fan main body is made of carbon steel or stainless steel, the fan comprises an impeller (1) and is arranged on a motor (4), the motor (4) is a power output source of the fan, and the fan main body is doubly fixed on an air duct (3) through a motor support (7) and a motor mounting flange; the fan is arranged on the lower anti-seismic support (5) and the upper anti-seismic support (2) through the anti-seismic base (8), and the lower anti-seismic support (5) and the upper anti-seismic support (2) are welded to the floor slab and the embedded plate welding on the ground up and down; the two fans adopt a mode of stacking the anti-seismic supports up and down, so that the requirement of spatial arrangement is met, and the anti-seismic requirement is met; the motor (4) is fixed by adopting double supports (B5+ B30), and the motor flange and the motor support (7) are fixed in a double mode, so that the running stability of the fan is guaranteed, the vibration of the fan is reduced, and the anti-seismic performance of the fan is improved.

2. The double-layer stacked nuclear-grade axial flow fan according to claim 1, characterized in that: straining device is including locating tensioning groove (20) in bolt (14), locating quadrant groove (21) on tensioning groove (20) inner wall, locating tensioning spring (22) of rotatory piece (15) upper end, locating swivelling chute (23) on rotatory piece (15), locating removal groove (24) on rotatory (15), locating tensioning block (25) of removal groove (24) one end, locating reset spring (26) on tensioning block (25), locating helicla flute (27) in swivelling chute (23), locating piston block (28) of removal groove (24) other end, locating piston spring (29) of piston block (28) bottom, locating spacing pipe (201) on rotatory piece (15), locating spacing groove (202) in spacing pipe (201), locating first stopper (203) in spacing groove (202), The device comprises a second limiting block (204) arranged on the tensioning block (25), an unlocking block (205) arranged in the limiting pipe (201), an unlocking spring (206) arranged on the unlocking block (205), a pressure rod (207) arranged at the upper end of the limiting pipe (201), a butt joint ball (208) arranged on the side wall of the pressure rod (207), a butt joint groove (209) arranged on the inner wall of the limiting pipe (201), a pneumatic pipe (210) arranged on the fixed support (100), a piston rod (211) arranged at the upper end of the pneumatic pipe (210), and an embedded block (212) arranged on the piston rod (211); the tensioning groove (20) is arranged in the bolt (14); a plurality of fan-shaped grooves (21) are uniformly arranged on the inner wall of the tensioning groove (20) along the circumferential direction of the tensioning groove (20); the tensioning block (25) is movably arranged in the moving groove (24); the spiral groove (27) is spiral and is arranged in the rotary groove (23).

3. The double-layer stacked nuclear-grade axial flow fan according to claim 1, characterized in that: the shockproof mechanism comprises an arc groove (30) arranged on the fixed support (100), a telescopic groove (31) arranged on the arc groove (30), a shockproof block (32) arranged in the telescopic groove (31), a piston tube 320 arranged at the bottom of the shockproof block 32, a slot 330 arranged in the shockproof block 32, an air tube (33) arranged in the shockproof block (32), a first connecting rod (34) arranged at one end of the air tube, a second connecting rod (35) arranged in the first connecting rod (34), a moving cavity (36) arranged in the shockproof block (32), a shockproof spring (37) arranged at the bottom of the shockproof block (32), a piston plate (38) arranged in the moving cavity (36), a second piston spring (39) arranged on the piston plate (38), a T-shaped block 390 arranged on the piston plate 38, and a butt joint tooth block (301) arranged on the fixed support (100), The anti-vibration device comprises embedded teeth (302) arranged at the bottom of the lower fixing ring (111), a butt joint spring (303) arranged on a butt joint tooth block (301), a telescopic pipe (304) arranged on the fixing support (100), a driving structure arranged on the inner wall of the telescopic pipe (304), and an anti-vibration structure arranged at the bottom of the fixing support (100); the longitudinal section of the arc groove (30) is arc-shaped and is arranged on the fixed bracket (100); the telescopic groove (31) is formed in the arc groove (30); one end of the shockproof block (32) is fixedly arranged at the bottom of the lower fixing ring (111), and the other end of the shockproof block is telescopically arranged at one end of the pneumatic tube (210); the shockproof block (32) is positioned in the telescopic groove (31); one end of the first connecting rod (34) can be arranged at one end of the air pipe (33) in an universal rotating manner; the first connecting rod (34) is a hollow pipe; one end of the second connecting rod (35) is telescopically arranged in the first connecting rod (34), and the other end of the second connecting rod can be universally and rotatably arranged on the inner wall of the telescopic groove (31); and two adjacent second connecting rods (35) are arranged in a vertically staggered manner.

4. The double-layer stacked nuclear-grade axial flow fan according to claim 3, characterized in that: the driving structure comprises a telescopic rod (40) arranged in the telescopic pipe (304), two thread blocks (41) arranged on the telescopic rod (40), a rotating cavity (42) arranged on the inner wall of the telescopic pipe (304), a thread ring (43) arranged in the rotating cavity (42), a rotating ring (44) arranged in the rotating cavity (42), a single bearing (45) connected with the rotating ring (44) and the thread ring (43), a reset torsion spring (46) arranged on the rotating ring (44), a ratchet gear (47) arranged on the side edge of the rotating ring (44), a first driving pipe (48) communicated with the rotating cavity (42) and an air pressure pipe (210), a ratchet block (49) arranged at one end of the first driving pipe (48), a second driving pipe (402) arranged at the other end of the first driving pipe (48), a trapezoid block (401) connected with the air pressure pipe (210) and the rotating cavity (42), and a second driving pipe (402), The driving rod (403) is arranged at one end of the second driving pipe (402), the first magnet (404) is arranged in the second driving pipe (402), the limiting toothed ring (405) is arranged at the bottom of the rotating ring (44), the limiting teeth (406) are arranged at the other end of the second driving pipe (402), the limiting spring (407) is arranged at the bottom of the limiting teeth (406), and the resetting component is arranged in the telescopic rod (40); the telescopic rod (40) is movably arranged in the telescopic pipe (304) and fixedly connected with the butt joint tooth block (301); the thread block (41) is movably arranged on the side wall of the telescopic rod (40), and the outer wall of the thread block (41) is in a thread shape; the rotating cavity (42) is arranged on the inner wall of the telescopic pipe (304); the threaded ring (43) is rotatably arranged in the rotating cavity (42) and is in threaded connection with the outer wall of the threaded block (41); the rotating ring (44) is rotatably arranged in the rotating cavity (42); the single bearing (45) is connected with the rotating ring (44) and the threaded ring (43); the cross section of the first driving pipe (48) is L-shaped and is communicated with the rotating cavity (42) and the air pressure pipe (210); the ratchet (49)

The movable driving pipe is movably arranged at one end of the first driving pipe (48) and is propped against the ratchet wheel (47); the trapezoid block (401) is trapezoid in longitudinal section and movably arranged at the other end of the first driving pipe (48).

5. The double-layer stacked nuclear-grade axial flow fan according to claim 5, characterized in that: the reset assembly comprises a reset cavity (50) arranged in the telescopic rod (40), a reset groove (51) arranged in the telescopic rod (40), a reset block (52) arranged on the inner wall of the thread block (41), a T-shaped block (53) arranged at the bottom of the reset cavity (50), a T-shaped spring (54) arranged on the T-shaped block (53), a second magnet (55) arranged at the bottom of the reset groove (51), a magnet spring (56) arranged on the second magnet (55), a first pull rope (57) arranged at the bottom of the T-shaped block (53), a positioning groove (58) arranged on the inner wall of the thread block (41), a pressing rod (59) arranged at the bottom of the telescopic rod (40), a positioning buckle (501) arranged at the upper end of the pressing rod (59), and a pressing spring (502) arranged at the bottom of the pressing rod (59); the T-shaped block (53) is movably arranged at the bottom of the reset cavity (50); the T-shaped spring (54) is arranged on the T-shaped block (53); the second magnet (55) is movably arranged at the bottom of the reset groove (51) and is attracted with the reset block (52); the magnet spring (56) is arranged on the second magnet (55); the first pull rope (57) is arranged at the bottom of the T-shaped block (53); the positioning groove (58) is formed in the inner wall of the thread block (41) in a Hangzhou shape, and the cross section of the positioning groove is L-shaped; the pressing rod (59) is movably arranged at the bottom of the telescopic rod (40); the cross section of the positioning buckle (501) is L-shaped, is arranged at the upper end of the abutting rod (50), and is buckled with the positioning groove (58); the abutting spring (502) is arranged at the bottom of the abutting rod (59).

6. The double-layer stacked nuclear-grade axial flow fan according to claim 3, characterized in that: the shockproof structure comprises a universal groove (60) arranged on the shockproof base (8), a universal block (61) arranged at the bottom of the universal groove (60), an air ring (620) arranged on the universal block (61), a rotary table (62) arranged at the upper end of the universal block (61), a buffer groove (63) arranged on the rotary table (62), a buffer block (64) arranged in the buffer groove (63), a buffer spring (65) arranged on the buffer block (64), a spring block (66) arranged on the buffer spring (65), a rectangular groove (67) arranged on the inner wall of the buffer groove (63), a pull groove (68) arranged in the buffer block (64), a rectangular block (69) arranged in the pull groove (68), a V-shaped rod (601) arranged at one end of the rectangular block (69), and a clamping groove (602) arranged on the shockproof base (8), The universal block comprises an air cavity (603) arranged at the bottom of the universal block (61), a clamping block (604) arranged in the air cavity (603), a clamping block spring (605) arranged on the clamping block (604), a first connecting pipe (606) connected with the air cavity (603) and an air ring (620), a second connecting pipe (607) connected with the air ring (620) and an air pressure groove (210), and a second pull rope (608) arranged on the clamping block (604); (ii) a The universal block (61) can be arranged in the universal groove (60) in a universal sliding manner; the cross section of the rotating platform (62) is circular and can be rotatably arranged on the universal block (61); the cross section of the buffer groove (63) is rectangular and is arranged on the rotating table (62); the buffer block (64) is fixedly arranged at the bottom of the fixed support (11) and is slidably arranged in the chute groove (63); the rectangular block (69) is movably arranged in the pull groove (68) and buckled in the rectangular groove (67); the longitudinal section of the V-shaped rod (601) is V-shaped, and two ends of the V-shaped rod are hinged with the rectangular block (69) respectively; and the midpoint is connected with a first pull rope (57); the clamping groove (602) is arranged at the bottom of the universal groove (60).

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