CN115717548A - Multistage tunnel construction fan of high altitude - Google Patents

Abstract

The invention discloses a high-altitude multistage tunnel construction fan, which comprises: the air duct is configured to be provided with a flow channel for conveying airflow; the movable impeller stirs air to generate a directional flowing air flow in the flow channel; a stationary impeller for guiding the air flow in the flow path to flow out in a predetermined direction; the stator vane wheel includes: the front stationary impeller is arranged in the flow channel; the rear stationary impeller is arranged on one side of the front stationary impeller; the multistage tunnel construction fan of high altitude still includes: the air filtering device is arranged at one end of the air duct; the blades of the movable impeller are in transition with the hub by a fillet not smaller than R10 mm; the front stationary blade, the rear stationary blade and the hub are in fillet transition not less than R10 mm; the airflow enters the air duct after passing through the air filtering device so as to block the sandstone out of the flow channel; the invention can improve the ventilation effect of the tunnel and reduce the damage of sand to the fan.

Description

High-altitude multistage tunnel construction fan

Technical Field

The invention belongs to the technical field of tunnel fans, and particularly relates to a high-altitude multistage tunnel construction fan.

Background

When a tunnel is built or a tunnel is communicated with a vehicle, the tunnel is a relatively closed environment with only two ends communicated with the outside, a large amount of dust is generated by excavation when the tunnel is built, and the dust can be mixed in the air to pollute the air, so that the normal process of a project is influenced, and the health of an excavator is also adversely influenced; and after the tunnel traffic, because the exchange that lacks the air with the external world, the air removal in the tunnel is smooth and easy inadequately, and a large amount of automobile exhaust and car are gone through the dust of rolling up, make the air in the tunnel become turbid, and air quality is extremely poor, causes certain injury to the people who pass through, and because the air is turbid, light itself in the tunnel is just darker in addition, this great improvement in the tunnel the frequency that traffic accident took place.

Disclosure of Invention

This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

The invention provides a high-altitude multistage tunnel construction fan for overcoming the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a high-altitude multistage tunnel construction fan comprises: the air duct is configured to be provided with a flow channel for conveying airflow; the movable impeller stirs air to generate a directional flowing airflow in the flow passage; a stationary impeller for guiding the air flow in the flow path to flow out in a predetermined direction; the stator vane wheel includes: the front static impeller is arranged in the flow channel; the rear stationary impeller is arranged on one side of the front stationary impeller; the multistage tunnel construction fan of high altitude still includes: the air filtering device is arranged at one end of the air duct; the blades of the movable impeller are in transition with the hub by a fillet not less than R10 mm; the front stationary blade, the rear stationary blade and the hub are in fillet transition of not less than R10 mm; the airflow enters the wind tube after passing through the air filtering device so as to block the sand outside the flow passage.

Further, the air filter device comprises: a cylinder configured to have a cavity for guiding an air flow; the cone is arranged at the bottom of the cylinder body; the material receiving box is arranged at the bottom of the cone; the air inlet pipe is arranged on the cylinder body and communicated with the cavity; the air outlet pipe is arranged at the top of the cylinder body; the air inlet pipe is arranged in the tangential direction of the cylinder body.

Further, the air filter device still includes: the guide plates are arranged in the conical body; the filter plate component is arranged in the air outlet pipe; the guide plate is the arc structure, and the cone bottom is located to the guide plate.

Further, the filter plate assembly comprises: the first filter plate is arranged in the air outlet pipe; the second filter plate is arranged at one end of the first filter plate; the first filter plate and the second filter plate are obliquely arranged; the first filter plate and the second filter plate are used alternately.

Further, the air filter device still includes: the connecting plate is arranged in the air outlet pipe; the stop block is connected to the connecting plate in a sliding manner; the plane of the stop block is vertical to the plane of the second filter plate.

Further, the filter plate assembly still includes: the connecting frame is arranged on one side of the first filter plate; the first connecting spring is used for connecting the connecting frame and the first filter plate; the first sliding block is arranged on the first filter plate, and the first sliding groove matched with the first sliding block is arranged on the air outlet pipe.

Further, the filter plate assembly further comprises: the first baffle is arranged on one side of the second filter plate; the first return spring is arranged on the first baffle plate; a plurality of first through grooves are formed in the first baffle, and when the stop blocks abut against the second filter plate, the first baffle moves relative to the second filter plate.

Further, the air filter device also comprises: the first push rod pushes the first sliding block to move in the first sliding groove; the rotating wheel pushes the first push rod to move discontinuously; the motor drives the rotating wheel to rotate; the first push rod is provided with a second return spring which drives the first push rod to move back.

Further, the air filter device also comprises: the first transmission wheel is in transmission fit with the rotating wheel; the second driving wheel is in transmission fit with the first driving wheel; the turntable is arranged on the second driving wheel; the rotary disc is provided with a second filter plate side, and a second lug used for pushing the second filter plate to move is arranged on the rotary disc.

Further, the air filter device also comprises: the material receiving box is arranged at the top of the cylinder; the first connecting pipe is used for communicating the air outlet pipe with the air duct; the second connecting pipe is used for communicating the first connecting pipe with the receiving box; the side part of the air outlet pipe is provided with an opening corresponding to the material receiving box, and the connecting plate is provided with a second baffle corresponding to the opening.

The invention has the advantages that: the high-altitude multistage tunnel construction fan improves the tunnel ventilation effect and reduces the damage of sand to the fan.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it.

Further, throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and that elements and elements are not necessarily drawn to scale.

In the drawings:

fig. 1 is a schematic structural view of a high-altitude multistage tunnel construction fan according to the present invention.

Fig. 2 is a sectional view of an air filter of the high-altitude multi-stage tunnel construction fan shown in fig. 1.

Fig. 3 is an enlarged view of a filter plate assembly of the high-altitude multi-stage tunnel construction fan shown in fig. 1.

Fig. 4 is an enlarged view of a material receiving box of the high-altitude multistage tunnel construction fan shown in fig. 1.

Fig. 5 is a sectional view of the high-altitude multi-stage tunnel construction fan shown in fig. 1 at a first active chamber.

Fig. 6 is an enlarged view of the movable plate of the high-altitude multi-stage tunnel construction fan shown in fig. 1.

Fig. 7 is a sectional view of the high-altitude multi-stage tunnel construction blower shown in fig. 1 at a fourth movable chamber.

Fig. 8 is an enlarged view of the high-altitude multi-stage tunnel construction blower shown in fig. 1 at the first driving wheel.

Fig. 9 is a sectional view of the high-altitude multi-stage tunnel construction fan shown in fig. 1 at the air outlet pipe.

Fig. 10 is an enlarged view of the high-altitude multi-stage tunnel construction blower shown in fig. 1 at the motor.

Fig. 11 is an enlarged view of a transmission shaft of the high-altitude multi-stage tunnel construction fan shown in fig. 1.

Fig. 12 is a graph of the variation characteristic of the total pressure of the high-altitude multi-stage tunnel construction fan along with the volume flow.

Fig. 13 is a characteristic curve diagram of the variation of the fan efficiency with the volume flow rate in the high-altitude multi-stage tunnel construction.

Fig. 14 is a characteristic curve diagram of the variation of the fan power with the volume flow in the high-altitude multi-stage tunnel construction.

Fig. 15 is a characteristic curve diagram of changes in the power of each stage of the high-altitude multi-stage tunnel construction fan along with the intake air volume flow.

The reference numerals in the figures have the following meanings: 101. an air duct; 102. a cylindrical body; 103. a cone; 104. a material receiving box; 105. an air inlet pipe; 106. an air outlet pipe; 107. a first connecting pipe; 108. a baffle; 109. a second connection pipe; 110. a first filter plate; 111. a second filter plate; 112. a connecting frame; 1121. a first connecting spring; 1122. a first push block; 113. a first baffle; 114. an end-block; 115. a connecting plate; 116. a stopper; 1161. a second connection spring; 1162. a drive plate; 117. a turntable; 1171. a second bump; 118. a material receiving box; 1181. a movable block; 1182. a fifth return spring; 1183. a third baffle plate; 1184. a support spring; 119. a third push block; 1191. a sixth return spring; 120. a second baffle; 1201. a second connecting shaft; 121. a third filter plate; 122. a movable plate; 1221. a rotating wheel; 1222. a first bump; 1223. a fifth push rod; 1224. a sixth push rod; 123. a first push rod; 124. a second push rod; 1241. a third return spring; 1242. a third push rod; 125. an electromagnet; 126. a third transmission wheel; 127. a first drive pulley; 1271. a drive shaft; 1272. connecting the disc; 1273. a third connecting spring; 128. a second transmission wheel; 129. a transmission belt; 130. a motor; 131. a second push block; 1311. and a fourth return spring.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is to be understood that the disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and the embodiments of the disclosure are for illustration purposes only and are not intended to limit the scope of the disclosure.

It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings. The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.

It should be noted that the terms "first", "second", and the like in the present disclosure are only used for distinguishing different devices, modules or units, and are not used for limiting the order or interdependence relationship of the functions performed by the devices, modules or units.

It is noted that references to "a", "an", and "the" modifications in this disclosure are intended to be illustrative rather than limiting, and that those skilled in the art will recognize that "one or more" may be used unless the context clearly dictates otherwise.

The names of messages or information exchanged between devices in the embodiments of the present disclosure are for illustrative purposes only, and are not intended to limit the scope of the messages or information.

The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 15, a high-altitude multistage tunnel construction fan includes an air duct 101, movable impellers, and stationary impellers; the duct 101 is configured to have a flow path for conveying the air flow; the movable impeller stirs the air to generate a directional flowing air flow in the flow passage; the stationary impeller guides the airflow in the flow passage to flow out in a designated direction.

The diameters of the movable impeller hub and the fixed impeller hub are 950mm, so that the outer diameter of the fan hub is designed according to the diameter of 950 mm; the inner diameter of the air duct 101 is designed according to 1600 mm; in order to reduce the influence of the leakage flow of the blade tip of the movable blade, a movable blade casing tip slot splitting structure designed by an aircraft engine turbine is adopted, namely the diameter of the movable blade is 1600mm, and the diameter of the movable blade casing is 1614mm. The inner diameter of a silencing air duct 101 at the front part of the movable blade is kept to be 1600mm, and the axial distance between the front mounting edge of a movable blade casing (wedge groove) and the blade tip of the movable blade is not less than 12mm; the outer diameter of the air inlet cone of the fan is 950mm, and the outer diameter of the air inlet cone of the fan is kept consistent with that of the hub.

The blade of the movable vane is in fillet transition with the hub by not less than R10mm so as to control the generation of angular vortex. If the blade is manufactured separately, the fillet is manufactured on the blade.

The stator vane wheel comprises a front stator vane wheel and a rear stator vane wheel, and the front stator vane wheel, the rear stator vane wheel, a hub and a casing are all in fillet transition of not less than R10mm so as to control the generation of an angular vortex. If welding is adopted, continuous welding of 30% chord length of the front part of the stator blade is guaranteed.

The number of the first stage moving blades D1 is 13. A forward-swept blade design used in transonic fans of aero-engine turbines in recent decades is adopted to improve the efficiency of the moving blades and reduce the influence of tip leakage on the flow field. Because the whole small forward sweep and the large forward sweep of the blade tip area are adopted, the structural stability of the blade is reduced. On the premise that the stress reserve of the blade meets the safety requirement, the performance characteristics of the movable blade are effectively improved.

The first-stage front-row stator blade F1 and the rear-row stator blade R1 adopt a tandem bent blade design, and the number of the blades is 17. The serial blades are designed to improve the adaptability of the large-bending pneumatic bending angle of the stationary blade; the design purpose of the strong positive bending blade is to control the generation and development of the circumferential secondary flow at the end region. Under the combined action of the two, the pneumatic bending angle of the static blade reaches more than 50 degrees, secondary flow in an end region is effectively inhibited, the total pressure recovery coefficient is relatively high, and the total pressure and the efficiency of the fan are improved.

The blade profile of all the blades adopts a controllable diffusion blade profile improved for a low-speed fan. The controllable diffusion blade profile is the optimal blade profile suitable for subcritical air intake, has wide attack angle range and low loss, and is a blade profile which is prone to be adopted in modern turbine design. However, the thickness of the tail edge of the blade is thin, so that the blade is not suitable for low-cost manufacturing of the fan, and therefore, the design is suitable for manufacturing, the thickness of the tail edge is increased, the thickness distribution of the blade profile is changed, and the low-loss characteristic of the blade under the low-speed condition is still maintained.

In order to reduce the cost of the multi-stage manufacturing as much as possible, the second stage moving blade D2 keeps the same geometry as the blade of D1, and the number of the blades is 14.

In order to reduce the cost of multistage manufacturing as much as possible, the second-stage front row stationary blades F2 and the second-stage rear row stationary blades R2 are all 17 blades, keeping the same blade geometry as that of F1 and R1, and the number of blades unchanged.

The high-altitude multistage tunnel construction fan further comprises an air filtering device, the air filtering device is arranged at one end of the air duct 101, and air flow enters the air duct 101 through the air filtering device and then blocks sand outside the flow channel.

The air filtering device comprises a cylinder body 102, a cone 103, a material receiving box 104, an air inlet pipe and an air outlet pipe, wherein the cylinder body 102 is constructed to be provided with a cavity for guiding air flow; the cone 103 is provided at the bottom of the cylinder 102; the material receiving box 104 is arranged at the bottom of the cone 103; the air inlet pipe is arranged on the cylinder body 102 and communicated with the cavity; the air outlet pipe is arranged at the top of the cylinder body 102; the air inlet pipe is arranged in the tangential direction of the cylinder 102, and the air outlet pipe is communicated with the air duct 101 through a first connecting pipe 107.

The fan during operation, the air enters into cylinder 102 from the intake pipe, under the guide of intake pipe cylinder 102 inner wall, the air that enters into in the cylinder 102 flows along cylinder 102 inner wall, the air produces vortex form air current in cylinder 102 naturally, the air in the cylinder 102 flows down to in the cone 103, grit and the cone 103 inner wall in the air produce the collision, make the grit drop down under the centrifugal force effect, the grit is collected in collecting box 104, the air current behind the filtering grit is discharged from the outlet duct, avoid the grit to cause the damage to the impeller in the together entering dryer 101 along with the air, reduced the noise that produces because the grit striking simultaneously, increase the travelling comfort that the fan used.

Utilize the setting of straining the gas device, effectual grit filtering with in the air plays the guard action to fan inside, extension fan life.

A plurality of guide plates 108 are arranged on the inner wall of the cone 103, the guide plates 108 are of arc structures, the guide plates 108 are arranged at the bottom of the cone 103, a filter plate assembly is arranged in the air outlet pipe, the filter plate assembly comprises a first filter plate 110 and a second filter plate 111, the number of the first filter plate 110 and the number of the second filter plate 111 are two, the first filter plate 110 is arranged at the top end of the second filter plate 111, the distance between the two first filter plates 110 is larger than the distance between the two second filter plates 111, an end block 114 is arranged in the air inlet pipe, the end block 114 is arranged at the bottom end of the second filter plate 111, and the first filter plates 110 and the second filter plates 111 are used alternately.

After air enters the cylinder 102 from the air inlet pipe, the air rotates in the cone 103, the airflow drives sand to flow to the guide plate 108, and the sand moves to the bottom of the cone 103 under the guide of the guide plate 108 so as to be collected in the material collecting box 104 after being separated; the arrangement of the guide plate 108 makes up the situation that the height of the cone 103 is insufficient, and improves the separation effect of sand and air flow so as to separate sand from air; because the height of the cone 103 is insufficient, part of dust is driven by the air flowing out from the air outlet pipe, the air flow in the air outlet pipe is filtered by the filter plate assembly, the air is further filtered, the dust entering the air duct 101 is further reduced, and the operation effect of the fan is ensured; through the alternate use of the first filter plate 110 and the second filter plate 111, the first filter plate 110 and the second filter plate 111 can be cleaned independently, so that air flow can flow out of the air outlet pipe normally, and the air inlet amount in the air duct 101 is ensured.

A connecting plate 115 is arranged on the inner wall of the air outlet pipe, a first movable groove is formed in the connecting plate 115, a stop block 116 is arranged in the first movable groove, a second connecting spring 1161 is arranged on the stop block 116, one end of the second connecting spring 1161 is fixedly connected to the inner wall of the first movable groove, and the plane where the stop block 116 is located is perpendicular to the plane where the second filter plate 111 is located; when the first filter plate 110 is used, the second filter plate 111 is closed, the stopper 116 is positioned in the first movable groove, the airflow directly flows from the second filter plate 111 to the first filter plate 110, the first filter plate 110 is used for filtering the airflow to remove dust in the airflow, and the second filter plate 111 plays a guiding role for the airflow, so that the airflow passes through the first filter plate 110, and the airflow flux is ensured; when the second filter plate 111 is used, the stopper 116 extends out of the first movable groove, the stopper 116 abuts against the second filter plate 111, the second filter plate 111 is in an open state, the stopper 116 blocks the air flow, the air flow cannot flow to the first filter plate 110, the air flow directly passes through the second filter plate 111, and the second filter plate 111 is used for filtering the air flow to filter out dust in the air flow; the use of the first filter plate 110 and the second filter plate 111 is controlled by the setting of the stopper 116, so that the first filter plate 110 and the second filter plate 111 can be used alternately, the first filter plate 110 and the second filter plate 111 can be cleaned, and the air outlet amount of the air outlet pipe is ensured.

A connecting frame 112 is arranged on one side of the first filter plate 110, a first connecting spring 1121 is arranged on the connecting frame 112, one end of the first connecting spring 1121 is fixedly connected to the first filter plate 110, and a first push block 1122 is arranged on the connecting frame 112; the side wall of the first filter plate 110 is provided with a first slide block, and the inner wall of the air outlet pipe is provided with a first slide groove matched with the first slide block.

When the stopper 116 extends out of the first movable groove and abuts against the second filter plate 111, the first slider moves in the first sliding groove, the first slider drives the first filter plate 110 to move away from the connecting frame 112, after the first slider moves to one end of the first sliding groove, the first connecting spring 1121 pulls the first filter plate 110 to move back, the first filter plate 110 impacts the first push block 1122, vibration is generated on the first filter plate 110 to shake off dust on the first filter plate 110, and the first filter plate 110 is cleaned; the dust falling from the first filter plate 110 falls onto the connection plate 115 to block the dust and prevent the dust from directly falling back into the cone 103 for collection processing.

A first baffle 113 is arranged on the second filter plate 111, a plurality of first through grooves are formed in the first baffle 113, and a first return spring is arranged at one end of the first baffle 113; when the first filter plate 110 is used, the first through groove is staggered with the filter holes on the second filter plate 111, the first baffle 113 seals the second filter plate 111, and the second filter plate 111 plays a role in guiding air flow; when the stopper 116 extends to abut against the second filter plate 111, the first baffle 113 moves relative to the second filter plate 111, the filter holes of the first through groove and the second filter plate 111 are aligned, the second filter plate 111 is in an open state, and airflow directly passes through the second filter plate 111, so that the air outlet amount of the air outlet pipe is ensured, and the fan can be continuously used.

A second movable groove is formed in the side wall of the first sliding groove, a first push rod 123 is arranged in the second movable groove, a second sliding block is arranged on the first push rod 123, a second sliding groove matched with the second sliding block is formed in the inner wall of the second movable groove, and a second reset spring is arranged on the second sliding block; a first movable cavity communicated with the second movable groove is arranged on the side wall of the air outlet pipe, a second push rod 124 is arranged in the first movable cavity, a first inclined groove is arranged at the bottom of the second push rod 124, a third return spring 1241 is arranged at one end of the second push rod 124, and one end of the third return spring 1241 is fixedly connected to the inner wall of the first movable cavity; a second movable cavity is arranged on the air outlet pipe, a movable plate 122 is arranged in the second movable cavity, a rotating wheel 1221 is arranged on the movable plate 122, a first bump 1222 is arranged on the rotating wheel 1221, a first transmission groove is arranged at the top of the second movable cavity, a third transmission wheel 126 is arranged in the first transmission groove, and a motor 130 for driving the third transmission wheel 126 to rotate is arranged at the top of the cylinder body 102; a third push rod 1242 is disposed at one end of the second push rod 124, and the third push rod 1242 is disposed in the second movable cavity.

A third sliding block is arranged on the side wall of the first baffle 113, a third sliding chute matched with the third sliding block is arranged on the inner wall of the air outlet pipe, a third movable cavity communicated with the second movable cavity is arranged on the side wall of the third sliding chute, a fourth push rod is arranged on the third sliding block, and the fourth push rod is arranged in the third movable cavity; the bottom of the movable plate 122 is provided with a fifth push rod 1223, and the fourth push rod is obliquely arranged; the movable plate 122 and the stopper 116 are made of ferromagnetic material, and an electromagnet 125 is disposed at the top of the air outlet pipe.

When the first filter plate is used, the electromagnet 125 is in a power-off state, the motor 130 does not work, the first through groove and the filter holes on the second filter plate 111 are staggered, the second filter plate 111 is in a closed state, and airflow flows to the first filter plate 110 along the second filter plate 111 to filter the airflow; when the first filter plate 110 is cleaned, the electromagnet 125 is electrified and generates differential magnetic force, the electromagnet 125 attracts the movable plate 122 and the stopper 116 to move upwards, and the stopper 116 extends out of the first movable groove and abuts against the second filter plate to seal the first filter plate; the movable plate 122 drives the fifth push rod 1223 to move together, the fifth push rod 1223 pushes the fourth push rod to move, the fourth push rod drives the third slide block to move, the first baffle 113 moves along with the third slide block, the first through groove is aligned with the filter holes on the second filter plate 111, and the second filter plate is opened; the rotating wheel 1221 moves to the bottom of the third driving wheel 126 and contacts with the third driving wheel 126, the motor 130 drives the third driving wheel 126 to rotate, the rotating wheel 1221 is driven to rotate by driving the third driving wheel 126, the first protrusion 1222 intermittently contacts with the third push rod 1242 when rotating along with the rotating wheel 1221, the first protrusion 1222 pushes the third push rod 1242 to move, the third push rod 1242 drives the second push rod 124 to move, the second push rod 124 pushes the first push rod 123 to move, the first push rod 123 pushes the first slider to move in the first sliding slot, after the first protrusion 1222 disengages from the third push rod 1242, the third return spring 1241 pulls the second push rod 124 to move back, the second return spring pushes the first push rod 123 to move back, the first connection spring pulls the first filter plate 110 to move in the direction of the connection frame 112, the first filter plate 110 impacts on the first push block to generate vibration 1122, so as to clean the first filter plate 110.

A fourth sliding block is arranged on the side wall of the second filter plate 111, a fourth sliding groove matched with the fourth sliding block is arranged on the inner wall of the air outlet pipe, the first baffle 113 is connected to the third sliding block in a sliding manner, the sliding direction of the first baffle 113 is perpendicular to that of the third sliding groove, and the arrangement direction of the fourth sliding groove is the same as that of the first baffle 113; a fourth movable cavity is arranged on the side wall of the air outlet pipe, the fourth movable cavity is arranged on one side of the first movable cavity, a first driving wheel 127 and a second driving wheel 128 are arranged in the fourth movable cavity, and the first driving wheel 127 and the second driving wheel 128 are connected through a driving belt 129; a first connecting shaft is arranged on the second driving wheel 128, penetrates out of the fourth movable cavity and penetrates through the air outlet pipe, a rotating disc 117 is arranged at one end of the first connecting shaft, a second bump 1171 is arranged on the rotating disc 117, and the rotating disc 117 is arranged on one side of the second filter plate 111; a transmission cavity communicated with the first transmission groove is formed in the side wall of the fourth movable cavity, a third movable groove is formed in the first transmission wheel 127, a transmission shaft 1271 is arranged in the third movable groove, a second transmission groove matched with the transmission shaft 1271 is formed in the third transmission wheel 126, a third connecting spring 1273 is arranged at one end of the transmission shaft 1271, and one end of the third connecting spring 1273 is fixedly connected to the inner wall of the third movable groove; a connecting disc 1272 is arranged on the transmission shaft 1271, a fourth movable groove is arranged at the bottom of the transmission cavity, a second push block 131 is arranged in the fourth movable groove, a fourth return spring 1311 is arranged on the second push block 131, and the second push block 131 cannot move out of the fourth movable groove; the top of the movable plate 122 is provided with a sixth push rod 1224, the top of the sixth push rod 1224 is provided with a second inclined surface, and the bottom of the fourth movable groove is provided with a second through groove corresponding to the sixth push rod 1224.

When the electromagnet 125 is attracted to move upwards through the movable block 1181, the movable plate 122 drives the sixth push rod 1224 to move upwards, the sixth push rod 1224 is inserted into the second through groove, the second inclined surface abuts against the bottom of one end of the second push block 131, when the sixth push rod 1224 pushes the second push block 131 to move, the second push block 131 pushes the connecting disc 1272 to move, the transmission shaft 1271 is disengaged from the second transmission groove, the third transmission wheel 126 is disengaged from the first transmission wheel 127 in transmission, and the motor 130 drives the third transmission wheel 126 to rotate without driving the first transmission wheel 127 to rotate; after the first filter plate 110 is cleaned, the electromagnet 125 is powered off, the movable plate 122 descends, the first baffle 113 closes the second filter plate 111 again, the motor 130 continues to drive the third driving wheel 126 to rotate, at this time, because the second filter plate 111 is in a closed state, when the airflow impacts on the second filter plate 111, the second filter plate 111 is pushed to move in the direction of the turntable 117, the driving shaft 1271 is inserted into the second driving groove, the third driving wheel 126 rotates to drive the first driving wheel 127 to rotate, the turntable 117 rotates along with the third driving wheel 126, when the second lug 1171 contacts with the second filter plate 111, the second filter plate 111 is pushed to move, the second filter plate 111 reciprocates under the action of the airflow and the second lug 1171, vibration is generated on the second filter plate 111, dust on the second filter plate 111 is shaken off, and the dropped off dust is scattered upwards to the first filter plate 110 along with the airflow, and all the dust is collected on the first filter plate 110, so as to clean the dust floating along with the air.

A material receiving box 118 is arranged on the cylinder body 102, an opening communicated with the material receiving box 118 is formed in the side portion of the air outlet pipe, a third filter plate 121 is arranged in the material receiving box 118, a third through groove is formed in one end of the material receiving box 118, and the material receiving box 118 is communicated with the first connecting pipe 107 through a second connecting pipe 109; a fourth movable groove is formed in the side wall of the third through groove, a third baffle 1183 is arranged in the fourth movable groove, and a support spring 1184 is arranged at the bottom of the third baffle 1183; a fifth movable groove is formed in the bottom of the material receiving box 118, a movable block 1181 is arranged in the fifth movable groove, a first connecting rope and a fifth reset spring 1182 are arranged on the movable block 1181, one end of the fifth reset spring 1182 is fixedly connected to the inner wall of the fifth movable groove, and one end of the first connecting rope is fixedly connected to the bottom end of the third baffle 1183; a sixth movable groove is formed in the top of the cylinder body 102, a third push block 119 is arranged in the sixth movable groove, and a sixth reset spring 1191 is arranged on the side wall of the third push block 119; the connecting plate 115 is provided with a second baffle 120, the second baffle 120 is provided with a second connecting shaft 1201, the connecting plate 115 is provided with a connecting groove corresponding to the second connecting shaft 1201, the side wall of the first movable groove is provided with a third transmission groove communicated with the connecting groove, the baffle 116 is provided with a transmission plate 1162 matched with the second connecting shaft 1201, the transmission plate 1162 is provided with a second connecting rope, and one end of the second connecting rope is fixedly connected to the third push block 119.

When the first filter plate 110 is used, the electromagnet 125 is in a power-off state, the stopper 116 is positioned in the first movable groove, and the second baffle 120 closes the opening, so that dust in the material receiving box 118 is prevented from entering the cylinder 102 from the opening; the third baffle 1183 closes the third through groove, so that the influence of the airflow in the first connecting pipe 107 on the dust in the material collecting box 118 is avoided; when the second filter plate 111 is used, the electromagnet 125 is electrified to generate magnetic force, the stopper 116 extends out of the first movable groove, the transmission plate 1162 drives the second connecting shaft 1201 to rotate, the second baffle plate 120 is turned over to be horizontal to open the opening, the second connecting rope pulls the third push block 119 to move, the third push block 119 pushes the movable block 1181 to move, the first connecting rope pulls the third baffle 1183 to move to open the third through groove, airflow flows in the first connecting pipe 107 to generate suction in the second connecting pipe 109, dust falling from the first filter plate 110 is sucked into the material collecting box 118, and the dust is taken out of the cylinder 102; the third filter plate 121 is used for blocking dust, so that the dust is prevented from entering the first connecting pipe 107 from the second connecting pipe 109, and the dust entering the air duct 101 is reduced.

The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combinations of the above-mentioned features, and other embodiments in which the above-mentioned features or their equivalents are combined arbitrarily without departing from the spirit of the invention are also encompassed. For example, the above features and (but not limited to) technical features with similar functions disclosed in the embodiments of the present disclosure are mutually replaced to form the technical solution.

Claims (10)

1. A high-altitude multistage tunnel construction fan comprises:

the air duct is configured to be provided with a flow channel for conveying airflow;

the movable impeller stirs air to generate a directional flowing air flow in the flow passage;

a stationary impeller for guiding the air flow in the flow path to flow out in a predetermined direction;

the method is characterized in that:

the stator vane wheel includes:

the front static impeller is arranged in the flow channel;

the rear stationary impeller is arranged on one side of the front stationary impeller;

the high-altitude multistage tunnel construction fan further comprises:

the air filtering device is arranged at one end of the air duct;

the blades of the movable impeller are in transition with the hub by a fillet not smaller than R10 mm; the front stationary blade, the rear stationary blade and the hub are in fillet transition of not less than R10 mm;

the airflow enters the wind barrel after passing through the air filtering device so as to block the sand outside the flow passage.

2. The high-altitude multistage tunnel construction fan according to claim 1, characterized in that: the air filtering device comprises:

a cylinder configured to have a cavity for guiding an air flow;

the cone is arranged at the bottom of the cylinder body;

the material receiving box is arranged at the bottom of the cone;

the air inlet pipe is arranged on the cylinder body and communicated with the cavity;

the air outlet pipe is arranged at the top of the cylinder body;

the air inlet pipe is arranged in the tangential direction of the cylinder body.

3. The high-altitude multistage tunnel construction fan according to claim 2, characterized in that: the gas filtering device further comprises:

the guide plates are arranged in the conical body;

the filter plate component is arranged in the air outlet pipe;

the guide plate is of an arc-shaped structure, and the guide plate is arranged at the bottom of the cone.

4. The high-altitude multistage tunnel construction fan according to claim 3, characterized in that: the filter plate assembly comprises:

the first filter plate is arranged in the air outlet pipe;

the second filter plate is arranged at one end of the first filter plate;

the first filter plate and the second filter plate are obliquely arranged; the first filter plate and the second filter plate are used alternately.

5. The high-altitude multistage tunnel construction fan according to claim 4, wherein: the gas filtering device further comprises:

the connecting plate is arranged in the air outlet pipe;

the stop block is connected to the connecting plate in a sliding manner;

the plane where the stop block is located is perpendicular to the plane where the second filter plate is located.

6. The high-altitude multistage tunnel construction fan according to claim 5, characterized in that: the filter plate assembly further comprises:

the connecting frame is arranged on one side of the first filter plate;

the first connecting spring is used for connecting the connecting frame and the first filter plate;

the first sliding block is arranged on the first filter plate, and the first sliding groove matched with the first sliding block is arranged on the air outlet pipe.

7. The high-altitude multistage tunnel construction fan according to claim 6, characterized in that: the filter plate assembly further comprises:

the first baffle is arranged on one side of the second filter plate;

the first return spring is arranged on the first baffle plate;

the first baffle is provided with a plurality of first through grooves, and when the stop blocks abut against the second filter plate, the first baffle moves relative to the second filter plate.

8. The high-altitude multistage tunnel construction fan according to claim 6, wherein: the gas filtering device further comprises:

the first push rod pushes the first sliding block to move in the first sliding groove;

the rotating wheel pushes the first push rod to move discontinuously;

the motor drives the rotating wheel to rotate;

and the first push rod is provided with a second return spring for driving the first push rod to move back.

9. The high-altitude multistage tunnel construction fan according to claim 8, characterized in that: the gas filtering device further comprises:

the first transmission wheel is in transmission fit with the rotating wheel;

the second driving wheel is in transmission fit with the first driving wheel;

the turntable is arranged on the second driving wheel;

the rotary disc is provided with one side of the second filter plate, and the rotary disc is provided with a second bump for pushing the second filter plate to move.

10. The high-altitude multistage tunnel construction fan according to claim 1, characterized in that: the gas filtering device further comprises:

the material receiving box is arranged at the top of the cylinder;

the first connecting pipe is used for communicating the air outlet pipe with the air duct;

the second connecting pipe is used for communicating the first connecting pipe with the material receiving box;

the side part of the air outlet pipe is provided with an opening corresponding to the material receiving box, and the connecting plate is provided with a second baffle corresponding to the opening.

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