Explosion-proof dust removal induced draft fan

Abstract

The invention relates to the technical field of induced draft fans, in particular to an explosion-proof dust removal induced draft fan which comprises a fan body, a motor, an air inducing pipe, an air outlet pipe and the like. The fan main body is fixedly connected with a motor, and an output shaft of the motor is fixedly connected with an impeller in the fan main body; the draught fan body is provided with an air inducing pipe, and the air inducing pipe is provided with a rotating door. The fan body is provided with an air outlet pipe, and an anemograph is arranged at the air outlet pipe. The first electric winding drum and the second electric winding drum rotate to wind the first filter screen, so that the use position of the first filter screen is switched, the blocked position of the first filter screen is cleaned, then the first electric winding drum and the second electric winding drum rotate reversely, the cleaned first filter screen is used again, the first filter screen can be repeatedly switched for use, and the use efficiency of the filter screen is improved. And the service cycle of the induced draft fan is prolonged, so that the situation that the filter screen is blocked, the induced draft fan and the boiler need to be manually shut down for maintenance, and the overall industrial production cost is increased is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of induced draft fans, and in particular to an explosion-proof dust removal induced draft fan. Background Art

[0002] An induced draft fan is a device that extracts and discharges gas by driving the impeller to rotate. It is used in various industrial and civil fields. In industrial boiler systems, the induced draft fan is used to extract the smoke and exhaust gas generated in the boiler and discharge them to the outside, so that enough fresh air can enter the boiler's combustion chamber to support the combustion of the fuel. The induced draft fan also extracts the exhaust gas and controls the pressure in the boiler's combustion chamber, so that the boiler combustion chamber is always kept stable within an appropriate negative pressure range to ensure the normal operation of the boiler.

[0003] When the induced draft fan of the boiler extracts and discharges the exhaust gas in the boiler, the exhaust gas contains oil smoke. People usually install a filter in the induced draft fan to filter the oil smoke in the exhaust gas and then discharge it to the outside to avoid pollution to the surrounding environment. However, after the filter in the existing induced draft fan has been used for a certain period of time, the intercepted oil smoke can easily clog it, making the filter unusable, resulting in the need to manually shut down the induced draft fan and the boiler to replace and clean the filter. Industrial boilers often need to run continuously and provide heat energy to the production line uninterruptedly. Stopping to replace the filter will affect the overall industrial production progress, and frequent starting and stopping of the boiler will also increase energy consumption, thereby increasing the overall industrial production cost. The filter in the existing induced draft fan cannot meet the boiler's need to continuously extract and discharge exhaust gas. Summary of the invention

[0004] In order to overcome the shortcoming that the filter screen in the existing induced draft fan cannot meet the demand of continuous extraction and discharge of exhaust gas from the boiler, the present invention provides an explosion-proof dust removal induced draft fan.

[0005] The technical solution is: an explosion-proof dust removal induced draft fan, including a fan body, a motor, an induced draft duct and an air outlet duct; the fan body is fixedly connected to the motor, and the motor output shaft is fixedly connected to the impeller in the fan body; the fan body is provided with an induced draft duct, and the induced draft duct is provided with a rotating door; the fan body is provided with an air outlet duct, and an anemometer is provided at the air outlet duct; it also includes a fixing ring, an isolation plate, a conical cover plate, a circular support frame, a winding unit, a filter screen, a storage box and a cleaning unit; the induced draft duct is fixedly connected to the fixing ring; the fixing ring is fixed An isolation plate is connected, and the isolation plate is fixedly connected to the inner wall of the induced draft duct; a circular support frame is fixedly connected to the fixed ring, and the circular support frame is provided with a plurality of support rods; a conical cover plate is fixedly connected to the side of the circular support frame away from the fixed ring, and the conical cover plate is fixedly connected to the isolation plate; a filter screen is arranged in the induced draft duct, and the filter screen is laid on the support rods of the circular support frame; the circular support frame is connected to a winding unit for winding and unwinding the filter screen; a storage box is fixedly connected to the outer wall of the induced draft duct; the storage box is connected to a cleaning unit for cleaning the filter screen.

[0006] Furthermore, the winding unit includes an electric winding drum 1, an electric winding drum 2, a conveying roller 1 and a conveying roller 2; an electric winding drum 1 is installed on a circular support frame, and the electric winding drum 1 is located below the isolation plate; one end of the filter screen 1 is fixedly connected to the electric winding drum 1 and wound inside it; the isolation plate is rotatably connected to the conveying roller 1; the air duct is provided with a through hole, and the through hole is located below the isolation plate; a plurality of conveying rollers 2 are rotatably connected in the storage box; and an electric winding drum 2 is installed on a support rod in the storage box.

[0007] Furthermore, it also includes a second filter screen; the air duct is fixedly connected with the second filter screen, and the second filter screen is located on the left side of the fixing ring.

[0008] Furthermore, it also includes a traction rope 1; an electric winding drum 1 is fixedly connected to and winds up a plurality of traction ropes 1, and the other ends of all the traction ropes 1 are commonly fixedly connected to one end of the filter screen 1.

[0009] Furthermore, each support rod is provided with a plurality of limiting rings corresponding to the traction ropes.

[0010] Furthermore, it also includes an arc-shaped fixing plate, an arc-shaped airbag, a strip-shaped fixing plate and a strip-shaped airbag; the fixing ring and the conical cover plate are each fixedly connected to an arc-shaped fixing plate, an arc-shaped airbag is fixedly connected to the inner side of each arc-shaped fixing plate, and the arc-shaped airbag is connected to an external pump; the two arc-shaped fixing plates are commonly fixedly connected to two strip-shaped fixing plates, and the two strip-shaped fixing plates are respectively located on the front and rear sides of the circular support frame; each strip-shaped fixing plate is fixedly connected to a strip-shaped airbag, and the strip-shaped airbag is connected to the arc-shaped airbag.

[0011] Furthermore, it also includes a warning light; a combustible gas detector is arranged inside the fan body; and the air duct is fixedly connected with a warning light.

[0012] Furthermore, the cleaning unit includes a water pipe, a circular tube, a nozzle, a driving unit and a brush roller; the storage box is fixedly connected to the water pipe, and the water pipe is connected to an external conveying mechanism; the water pipe is connected to a plurality of circular tubes; each circular tube is connected to a plurality of nozzles for spraying cleaning liquid; the storage box is provided with a compartment door; the storage box is provided with a drain pipe; the storage box is connected to a driving unit; the driving unit is connected to two brush rollers, and the driving unit is used to drive the brush rollers to move.

[0013] Furthermore, it also includes a traction rope 2; the electric winding drum 2 is fixedly connected to and winds up a plurality of traction ropes 2, and the other ends of all the traction ropes 2 are commonly fixedly connected to the filter screen 1.

[0014] Furthermore, each conveying roller 2 is provided with a plurality of limiting grooves corresponding to the traction rope 2.

[0015] The present invention has the following advantages:

[0016] The filter screen 1 is rolled up by rotating the electric winding drum 1 and the electric winding drum 2, thereby switching the use position of the filter screen 1 and cleaning the blocked position of the filter screen 1. The electric winding drum 1 and the electric winding drum 2 are then reversed and the cleaned filter screen 1 is used again, so that the filter screen 1 can be repeatedly switched for use, thereby increasing the service life of the induced draft fan, thereby avoiding clogging of the filter screen, requiring manual shutdown of the induced draft fan and the boiler for maintenance, and increasing the overall industrial production cost.

[0017] The electric winding drum is rotated to release the traction rope, so that the last section of the filter screen in the electric winding drum can be fully pulled out and moved into the storage box to clean the oil on its surface, avoiding the problem that part of the filter screen cannot be cleaned; and the position of the traction rope is limited by a limit ring to avoid the deviation of the traction rope when it is pulled out, which affects the subsequent rewinding of the filter screen.

[0018] By rotating the two brush rollers relative to each other, the surface of the brush roller is self-cleaned to remove the oil stains attached to the surface, thereby ensuring the cleaning effect of the subsequent brush rollers. At the same time, by releasing the traction rope 2, the two brush rollers have more contact area when they contact each other, thereby improving the self-cleaning effect of the brush rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure disclosed by the explosion-proof dust removal induced draft fan of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure inside the induced draft duct disclosed by the explosion-proof dust removal induced draft fan of the present invention;

[0021] Figure 3 It is a schematic diagram of the combined structure of a circular support frame, a first electric take-up drum, a first filter screen, a second electric take-up drum, a first conveying roller and a second conveying roller disclosed in the explosion-proof dust removal induced draft fan of the present invention;

[0022] Figure 4 An exploded view of a fixed ring, a separation plate, a conical cover plate, a circular support frame and an electric take-up drum disclosed in the explosion-proof dust removal induced draft fan of the present invention;

[0023] Figure 5 A state diagram of a traction rope disclosed by the explosion-proof dust removal induced draft fan of the present invention being pulled out;

[0024] Figure 6 A schematic structural diagram of a combination of a separation plate, a conical cover plate, an arc-shaped fixing plate and a strip-shaped fixing plate disclosed in the explosion-proof dust removal induced draft fan of the present invention;

[0025] Figure 7 It is a schematic structural diagram of the arc-shaped fixing plate, arc-shaped airbag, strip-shaped fixing plate and strip-shaped airbag combination disclosed by the explosion-proof dust removal induced draft fan of the present invention;

[0026] Figure 8 It is a schematic diagram of the cleaning unit structure disclosed by the explosion-proof dust removal induced draft fan of the present invention;

[0027] Fig. 9 A schematic diagram of the structure of a driving unit disclosed by the explosion-proof dust removal induced draft fan of the present invention;

[0028] Fig.10 The figure is a state diagram of the traction rope 2 disclosed by the explosion-proof dust removal induced draft fan of the present invention being pulled out.

[0029] Figure numbers: 1-fan body, 2-motor, 3-induction duct, 4-outlet duct, 5-fixing ring, 6-isolation plate, 7-conical cover plate, 8-circular support frame, 9-electric winding drum 1, 10-filter screen 1, 11-electric winding drum 2, 12-conveying roller 1, 13-conveying roller 2, 14-storage box, 15-filter screen 2, 101-traction rope 1, 111-arc fixing plate, 112-arc airbag, 113-strip fixing plate, 11 4-strip airbag, 121-warning light, 201-water pipe, 202-round pipe, 203-spray pipe, 204-brush roller, 205-traction rope 2, 211-guide rail 1, 212-electric slider 1, 213-guide rail 2, 214-electric slider 2, 215-motor, 300-revolving door, 301-through hole, 801-support rod, 802-limiting ring, 1301-limiting groove, 1401-warehouse door, 1402-drain pipe. DETAILED DESCRIPTION

[0030] The technical solution is further described below in conjunction with specific embodiments. It should be noted that the words indicating directions such as up, down, left, and right mentioned in this article are only for the position of the structure shown in the corresponding drawings. The serial numbers of the parts in this article, such as first, second, etc., are only used to distinguish the objects described and do not have any order or technical meaning. The words such as connection and coupling in this application include direct and indirect connection (coupling) unless otherwise specified.

[0031] Example 1

[0032] An explosion-proof dust removal fan, such as Figure 1-Figure 10 As shown, it includes a fan body 1, a motor 2, an air induced draft pipe 3 and an air outlet pipe 4; the fan body 1 is fixedly connected to the motor 2, and the output shaft of the motor 2 is fixedly connected to the impeller in the fan body 1; the fan body 1 is provided with the air induced draft pipe 3, and the air induced draft pipe 3 is provided with a rotating door 300, and the parts inside the air induced draft pipe 3 are conveniently maintained by opening the rotating door 300; the fan body 1 is provided with the air outlet pipe 4, and the air outlet pipe 4 is provided with an anemometer;

[0033] It also includes a fixing ring 5, an isolation plate 6, a conical cover plate 7, a circular support frame 8, a winding unit, a filter screen 10, a storage box 14 and a cleaning unit; the inner wall of the air duct 3 is fixedly connected with the fixing ring 5; the fixing ring 5 is fixedly connected with the isolation plate 6, and the isolation plate 6 is fixedly connected to the inner wall of the air duct 3; the fixing ring 5 is fixedly connected with the circular support frame 8, and the circular support frame 8 is provided with a plurality of support rods 801; the side of the circular support frame 8 away from the fixing ring 5 is fixedly connected with the conical cover plate 7, and the conical cover plate 7 is fixedly connected to the isolation plate 6; a filter screen 10 is provided in the air duct 3, and the filter screen 10 is laid on the support rod 801 of the circular support frame 8; the circular support frame 8 is connected with the winding unit; the outer wall of the air duct 3 is fixedly connected with the storage box 14; the storage box 14 is connected with the cleaning unit.

[0034] The winding unit includes an electric winding drum 19, an electric winding drum 211, a conveying roller 12 and a conveying roller 213; the circular support frame 8 is equipped with an electric winding drum 19, and the electric winding drum 19 is located below the isolation plate 6; one end of the filter screen 10 is fixedly connected to the electric winding drum 19 and wound inside it; the bottom of the isolation plate 6 is rotatably connected to the conveying roller 12; the air duct 3 is provided with a through hole 301, and the through hole 301 is located below the isolation plate 6; five conveying rollers 213 are rotatably connected in the storage box 14; the storage box 14 is provided with a through hole 301, and the through hole 301 is located below the isolation plate 6; five conveying rollers 213 are rotatably connected in the storage box 14; the storage box 14 is provided with a through hole 301, and the through hole 301 is located below the isolation plate 6; the storage box 14 is provided with a through hole 301, and the through hole 301 is located below the isolation plate 6; the storage box 14 is provided with a through hole 301, and the through hole 301 is provided ... An electric winding drum 11 is installed in the box 14, one end of the filter screen 10 is connected to the electric winding drum 9, and the other end passes through between the isolation plate 6 and the front side of the circular support frame 8, and is wound around all the support rods 801, and then passes through between the isolation plate 6 and the rear side of the circular support frame 8 to the bottom of the isolation plate 6, and then under the guidance of the conveying roller 12, passes through the through hole 301 of the air duct 3 to enter the storage box 14, and is wound around several conveying rollers 13, and then connected to the electric winding drum 11.

[0035] The second filter screen 15 is also included; the air duct 3 is fixedly connected with the second filter screen 15, and the second filter screen 15 is located on the left side of the fixing ring 5.

[0036] It also includes a traction rope 101; the electric winding drum 9 is fixedly connected to and winds up three traction ropes 101, and the other ends of all the traction ropes 101 are fixedly connected to one end of the filter screen 10.

[0037] Each support rod 801 is provided with a plurality of limiting rings 802 corresponding to the traction rope 101. The limiting rings 802 are used to limit the position of the traction rope 101 to prevent the traction rope 101 from being offset when being pulled out, thereby affecting the subsequent rewinding of the filter screen 10.

[0038] It also includes an arc-shaped fixing plate 111, an arc-shaped airbag 112, a strip-shaped fixing plate 113 and a strip-shaped airbag 114; the fixing ring 5 and the conical cover plate 7 are each fixedly connected to an arc-shaped fixing plate 111, and an arc-shaped airbag 112 is fixedly connected to the inner side of each arc-shaped fixing plate 111, and the arc-shaped airbag 112 is connected to the external pump; the two arc-shaped fixing plates 111 are commonly fixedly connected to two strip-shaped fixing plates 113, and the two strip-shaped fixing plates 113 are respectively located on the front and rear sides of the circular support frame 8; each strip-shaped fixing plate 113 is fixedly connected to a strip-shaped airbag 114, and the strip-shaped airbag 114 is connected to the arc-shaped airbag 112.

[0039] It also includes a warning light 121; a combustible gas detector is arranged inside the fan body 1; the air duct 3 is fixedly connected to the warning light 121, and when the combustible gas detector detects that the concentration of combustible gas inside the fan body 1 is too high, it can send a signal, and the warning light 121 lights up after receiving the signal, issuing a warning to relevant staff.

[0040] When the device is in use, the induced draft duct 3 is manually connected to the exhaust pipe of the boiler. During subsequent operation, the control motor 2 drives the impeller inside the fan body 1 to rotate, and the exhaust gas inside the boiler is extracted through the induced draft duct 3, and discharged to the outside through the outlet duct 4; at the same time, people usually set a filter in the induced draft duct 3 to filter the oil smoke in the extracted exhaust gas, so as to prevent the oil smoke from adhering to the impeller surface inside the fan body 1 and affecting the normal operation of the induced draft fan, and to prevent the oil smoke from being directly discharged to the outside and causing pollution to the surrounding environment; however, after a certain period of use, the filter in the existing induced draft fan is easily blocked by the intercepted oil smoke, and cannot meet the demand of the boiler for continuous extraction and discharge of exhaust gas, resulting in the need to manually shut down the induced draft fan and the boiler, and replace and clean the filter, while industrial boilers often need to run continuously and provide heat energy to the production line uninterruptedly. Stopping to replace the filter will affect the overall industrial production progress, and frequent starting and stopping of the boiler will also increase energy consumption, thereby increasing the overall industrial production cost.

[0041] Therefore, a filter screen 10 is provided inside the induced draft duct 3, one end of the filter screen 10 is connected to the electric winding drum 19, and the other end passes through between the isolation plate 6 and the front side of the circular support frame 8, and is arranged around all the support rods 801, and then passes through between the isolation plate 6 and the rear side of the circular support frame 8 to the bottom of the isolation plate 6, and then under the guidance of the conveying roller 12, passes through the through hole 301 of the induced draft duct 3 into the storage box 14, and is wound around a number of conveying rollers 2 13, and is connected to the electric winding drum 2 11. When the motor 2 drives the fan body 1 to work, the exhaust gas in the boiler enters the induced draft duct 3, and under the guidance of the conical cover plate 7, the exhaust gas passes through the filter screen 10 from the outside of the circular support frame 8 The exhaust gas is then filtered out from the exhaust pipe 4 by the filter 10, thereby preventing the oil smoke from adhering to the impeller surface inside the fan body 1 and affecting the normal operation of the induced draft fan, and preventing the oil smoke from being directly discharged to the outside and causing pollution to the surrounding environment. Considering that when the filter 10 is used continuously, the oil smoke intercepted on the surface will block the filter 10 and hinder the extraction of the exhaust gas, an anemometer is provided at the exhaust pipe 4 to monitor the air volume of the exhaust pipe 4. When it is detected that the air volume is significantly reduced, it means that the filter 10 is blocked. At this time, the electric reel 9 is controlled to release the filter 10 and The electric take-up drum 11 is synchronously controlled to take up the filter 10, and the used filter 10 segment that is clogged is taken up and moved, so that the clogged filter 10 segment passes through the through hole 301 of the air duct 3 and is moved into the storage box 14, and a segment of the filter 10 that has not been used is pulled out from the electric take-up drum 9 and is wound around the surface of the circular support frame 8 for subsequent oil fume filtering work; and when the filter 10 segment that is clogged with oil is moved into the storage box 14, the oil on the surface of the filter 10 segment is cleaned by the cleaning unit in the storage box 14, and after cleaning, it is rolled up in the electric take-up drum 11, and after all the filters 10 in the subsequent electric take-up drum 9 are used, the filter 10 segment is controlled again. The electric take-up drum 19 and the electric take-up drum 2 11 are made to rotate in opposite directions, and the cleaned filter screen 10 is rewound into the electric take-up drum 19, and the above operation is repeated to filter the extracted exhaust gas; in this way, the filter screen 10 is rolled up by the electric take-up drum 19 and the electric take-up drum 2 11, thereby switching the use position of the filter screen 10, and the blocked part of the filter screen 10 is cleaned, and then the electric take-up drum 19 and the electric take-up drum 2 11 are reversed to use the cleaned filter screen 10 again, so that the filter screen 10 can be repeatedly switched for use, thereby increasing the service life of the induced draft fan, thereby avoiding the need to manually shut down the induced draft fan and the boiler for maintenance due to blockage of the filter screen, thereby increasing the overall industrial production cost.

[0042] Furthermore, considering that when the exhaust gas passes through the filter 10, part of the exhaust gas will directly pass through the gap between the filter 10 and the circular support frame 8, so that part of the exhaust gas is not filtered and is directly discharged, thereby causing pollution to the surrounding environment. Therefore, when the filter 10 is in a static state for filtering, the pump is controlled to work at the same time to fill the gas into the arc-shaped airbag 112, so that the arc-shaped airbag 112 and the strip airbag 114 expand, and the filter 10 is pressed against the surface of the circular support frame 8 by the expansion of the arc-shaped airbag 112, so as to seal the gap between the filter 10 and the circular support frame 8, and the gap between the isolation plate 6 and the circular support frame 8 is sealed by the expansion of the strip airbag 114, so as to avoid that part of the exhaust gas is not filtered by the filter 10 and is directly discharged to the outside, thereby causing pollution to the outside environment. At the same time, if the filter 10 is blocked, when the filter 10 is switched, It is necessary to extract the gas in the arc-shaped air bag 112 and the strip-shaped air bag 114 first, so as to facilitate the movement and switching of the filter 10. At this time, there is still some exhaust gas that will be directly discharged to the outside through the gap. Therefore, a filter 2 15 is also provided. In the process of switching the filter 10, the exhaust gas is filtered by the filter 2 15, so that the extracted exhaust gas is fully filtered to prevent the oil smoke in the exhaust gas from being directly discharged to the outside and causing pollution to the external environment. It should be noted that each time the electric winding drum 1 9 and the electric winding drum 2 11 rotate with each other to rewind the filter 10, the time is relatively short, which makes the actual use time of the filter 2 15 relatively short. Therefore, the filter 2 15 is not easily blocked by oil stains, and the filter 2 15 only needs to be maintained regularly 1-2 times a month. This greatly improves the sustainable working cycle of the induced draft fan and avoids the problem of frequent manual shutdown of the induced draft fan and the boiler for maintenance of the induced draft fan.

[0043] Considering that as the electric take-up drum 9 continues to release the filter 10, when the electric take-up drum 9 releases all the rolled-up filter 10 inside, the filter 10 part connected to the electric take-up drum 9 is wound around the surface of the circular support frame 8 to perform filtering work, and when this filter 10 section is blocked during use, since the filter 10 in the electric take-up drum 9 has been completely released, this filter 10 section cannot be pulled into the storage box 14 for cleaning. When the take-up drum 11 is reversed and the electric take-up drum 9 is taken up, the uncleaned filter screen 10 segment will come into contact with other cleaned filter screen 10 segments, contaminating the cleaned filter screen 10 segments and affecting the use of subsequent filter screens 10; therefore, a traction rope 101 is also provided. When the filter screen 10 near the last segment of the electric take-up drum 9 is blocked, the electric take-up drum 11 is continuously controlled to rotate and take up the filter screen 10, and the electric take-up drum 9 rotates to release the traction rope 101, such as Figure 5As shown, the filter screen 10 is wound around the support rod 801 of the circular support frame 8 by a traction rope 101 instead of the filter screen 10, so that all parts of the filter screen 10 can be moved into the storage box 14, and the oil stains on its surface are cleaned by the cleaning unit in the storage box 14. When the subsequent cleaning is completed, the electric winding drum 19 and the electric winding drum 2 11 are controlled to reverse, and the traction rope 101 is wound back into the electric winding drum 9, and the cleaned filter screen 10 is rewound in the electric winding drum 9 for subsequent use. The traction rope 101 is released by rotating the electric winding drum 9, so that the last section of the filter screen 10 in the electric winding drum 9 can be fully pulled out and moved to the storage box 14 to clean the oil stains on its surface, thereby avoiding the problem that part of the filter screen 10 cannot be cleaned; and considering that the traction rope 10 When the traction rope 101 is pulled out and slides on the support rod 801 of the circular support frame 8, the pulled traction rope 101 is easily offset on the support rod 801, thereby affecting the subsequent rewinding of the filter 10. Therefore, a limit ring 802 is provided on the support rod 801, and the position of the traction rope 101 is limited by the limit ring 802 to avoid the traction rope 101 from being offset when it is pulled out, thereby affecting the subsequent rewinding of the filter 10; and, when the traction rope 101 is pulled out and wound around the support rod 801, the exhaust gas extracted at this time enters from the gap between the support rod 801 and the traction rope 101, and is filtered by the filter 15 to intercept the oil smoke in the exhaust gas, thereby avoiding the exhaust gas being directly discharged to the outside during the cleaning process of the filter 10, causing pollution to the external environment.

[0044] In addition, during the operation of the boiler, combustible gases such as natural gas and coal gas are generated or leaked. These leaked gases are prone to explosion in a high temperature environment. Therefore, a combustible gas detector is provided inside the fan body 1. When the combustible gas in the boiler leaks, the combustible gas will be sucked into the interior by the induced draft fan. The combustible gas inside the fan body 1 can be detected by the combustible gas detector. When the concentration is detected to be too high, a signal can be sent out. The warning light 121 lights up after receiving the signal, and warns the relevant staff, and immediately disconnects the power supply of the induced draft fan, and closes the relevant gas source valves to prevent more combustible gas leakage. Subsequently, it is manually ventilated to dilute and discharge the leaked combustible gas, thereby avoiding the continuous accumulation of combustible gas and the occurrence of explosion.

[0045] Example 2

[0046] On the basis of Example 1, Figure 8-Figure 10As shown, the cleaning unit includes a water pipe 201, a circular tube 202, a nozzle 203, a driving unit and a brush roller 204; the storage box 14 is fixedly connected with the water pipe 201, and the water pipe 201 is connected with the external conveying mechanism; the water pipe 201 is connected with a plurality of circular tubes 202; each circular tube 202 is connected with a plurality of nozzles 203; the storage box 14 is provided with a compartment door 1401, by opening the compartment door 1401, it is convenient to maintain the parts inside the storage box 14; the storage box 14 is provided with a drain pipe 1402; the storage box 14 is connected with a driving unit; the driving unit is connected with two brush rollers 204, and the driving unit is used to drive the brush roller 204 to move.

[0047] It also includes a traction rope 205; the electric winding drum 2 11 is fixedly connected to and winds up three traction ropes 205, and the other ends of all the traction ropes 205 are fixedly connected to the filter screen 10.

[0048] Each conveying roller 13 is provided with a plurality of limiting grooves 1301 corresponding to the traction rope 205 , and the position of the traction rope 205 is limited by the limiting grooves 1301 to prevent the traction rope 205 from being deviated and affecting the subsequent winding of the filter screen 10 .

[0049] The driving unit includes a guide rail 1 211, an electric slider 1 212, a guide rail 213, an electric slider 214 and a motor 215; the storage box 14 is fixedly connected to two guide rails 1 211; each guide rail 1 211 is slidably connected to an electric slider 1 212; two electric sliders 1 212 are commonly fixedly connected to a guide rail 2 213; the guide rail 213 is slidably connected to two electric sliders 214; each electric slider 214 is fixedly connected to a motor 215, and the output part of each motor 215 is fixedly connected to the corresponding brush roller 204.

[0050] On the basis of the above-mentioned embodiment 1, the electric winding drum 19 and the electric winding drum 211 rotate with each other, driving the filter 10 to move. During the movement, the blocked filter 10 is moved into the storage box 14. At this time, the external conveying mechanism is synchronously controlled to pass the cleaning liquid into the water pipe 201 and the circular tube 202, and spray it downward from the nozzle 203 to clean the filter 10 moving below. At the same time, the motor 215 is controlled to drive the brush roller 204 to rotate, and the electric slider 1 212 is controlled to drive the guide rail 213, the electric slider 214 and the brush roller 204 to move up and down along the guide rail 1 211. The brush roller 204 rotates and moves up and down, and cooperates with the nozzle 203 to spray the cleaning liquid, so that the moving filter 10 is cleaned, so as to facilitate the repeated use of the filter 10. After cleaning, the filter 10 is rolled up into the electric winding drum 211 for subsequent use; after cleaning, the cleaned sewage is discharged through the drain pipe 1402.

[0051] Furthermore, when the traction rope 101 in the electric reel 19 is pulled out and all parts of the filter 10 are moved to the storage box 14 for cleaning, the electric reel 19 and the electric reel 2 11 are controlled to reverse, and the cleaned filter 10 is rewound in the electric reel 19 for subsequent use. During this process, the electric reel 2 11 releases all the cleaned filter 10 and pulls out the traction rope 205 in the electric reel 2 11. Fig.10 As shown, when the filter screen 10 is fixed by the arc-shaped airbag 112 and the strip-shaped airbag 114 for filtering, the electric slider 214 is controlled to drive the brush roller 204 to move relative to each other along the guide rail 213, and the electric winding drum 211 is continuously controlled to release the traction rope 205, so that the two brush rollers 204 contact each other, and then the motor 215 is controlled to drive the brush roller 204 to rotate, and the nozzle 203 is controlled to spray cleaning liquid, and the two brush rollers 204 rotate relative to each other, so that the surface of the brush roller 204 is self-cleaned, and the oil stains attached to the surface are cleaned to ensure the cleaning effect of the subsequent brush roller 204, and at the same time, by releasing the traction rope 205, the two brush rollers 204 have more contact area when they contact each other, thereby improving the self-cleaning effect of the brush roller 204; and, a limiting groove 1301 is provided on the conveying roller 13, and the position of the traction rope 205 is limited by the limiting groove 1301 to prevent the traction rope 205 from being offset and affecting the subsequent winding of the filter screen 10.

[0052] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. An explosion-proof dust removal induced draft fan, comprising a fan body (1), a motor (2), an induced draft pipe (3) and an air outlet pipe (4); the fan body (1) is fixedly connected to the motor (2), and the output shaft of the motor (2) is fixedly connected to the impeller in the fan body (1); the fan body (1) is provided with an induced draft pipe (3), and the induced draft pipe (3) is provided with a rotating door (300); the fan body (1) is provided with an air outlet pipe (4), and an anemometer is provided at the air outlet pipe (4); characterized in that, The invention also comprises a fixing ring (5), an isolation plate (6), a conical cover plate (7), a circular support frame (8), a winding unit, a filter screen (10), a storage box (14) and a cleaning unit; the air duct (3) is fixedly connected to the fixing ring (5); the fixing ring (5) is fixedly connected to the isolation plate (6), and the isolation plate (6) is fixedly connected to the inner wall of the air duct (3); the fixing ring (5) is fixedly connected to the circular support frame (8), and the circular support frame (8) is provided with a plurality of support rods (801); the circular support frame (8) is away from A conical cover plate (7) is fixedly connected to one side of the fixed ring (5), and the conical cover plate (7) is fixedly connected to the isolation plate (6); a filter screen (10) is arranged in the air duct (3), and the filter screen (10) is laid on the support rod (801) of the circular support frame (8); the circular support frame (8) is connected to a reeling unit for reeling in and unreeling the filter screen (10); a storage box (14) is fixedly connected to the outer wall of the air duct (3); and the storage box (14) is connected to a cleaning unit for cleaning the filter screen (10).

2. The explosion-proof dust removal fan according to claim 1, characterized in that: The winding unit comprises an electric winding drum (9), an electric winding drum (11), a conveying roller (12) and a conveying roller (13); the circular support frame (8) is equipped with the electric winding drum (9), and the electric winding drum (9) is located below the isolation plate (6); one end of the filter screen (10) is fixedly connected to the electric winding drum (9) and is wound inside the electric winding drum; the isolation plate (6) is rotatably connected to the conveying roller (12); the air duct (3) is provided with a through hole (301), and the through hole (301) is located below the isolation plate (6); a plurality of conveying rollers (13) are rotatably connected inside the storage box (14); the electric winding drum (11) is installed on the support rod (801) inside the storage box (14).

3. The explosion-proof dust removal induced draft fan according to claim 1, characterized in that: It also includes a second filter screen (15); the air duct (3) is fixedly connected with the second filter screen (15), and the second filter screen (15) is located on the left side of the fixing ring (5).

4. The explosion-proof dust removal induced draft fan according to claim 3, characterized in that: It also includes a traction rope (101); an electric winding drum (9) is fixedly connected to and winds up a plurality of traction ropes (101), and the other ends of all the traction ropes (101) are fixedly connected to one end of the filter screen (10).

5. The explosion-proof dust removal induced draft fan according to claim 4, characterized in that: Each support rod (801) is provided with a plurality of limiting rings (802) corresponding to the traction rope 1 (101).

6. The explosion-proof dust removal induced draft fan according to claim 1, characterized in that: It also includes an arc-shaped fixing plate (111), an arc-shaped air bag (112), a strip-shaped fixing plate (113) and a strip-shaped air bag (114); the fixing ring (5) and the conical cover plate (7) are each fixedly connected to an arc-shaped fixing plate (111), and an arc-shaped air bag (112) is fixedly connected to the inner side of each arc-shaped fixing plate (111), and the arc-shaped air bag (112) is connected to an external pump; the two arc-shaped fixing plates (111) are commonly fixedly connected to two strip-shaped fixing plates (113), and the two strip-shaped fixing plates (113) are respectively located at the front side and the rear side of the circular support frame (8); each strip-shaped fixing plate (113) is each fixedly connected to a strip-shaped air bag (114), and the strip-shaped air bag (114) is connected to the arc-shaped air bag (112).

7. The explosion-proof dust removal induced draft fan according to claim 1, characterized in that: It also includes a warning light (121); a combustible gas detector is arranged inside the fan body (1); and the air induced pipe (3) is fixedly connected with the warning light (121).

8. The explosion-proof dust removal induced draft fan according to claim 7, characterized in that: The cleaning unit comprises a water pipe (201), a circular tube (202), a spray pipe (203), a driving unit and a brush roller (204); the storage box (14) is fixedly connected with the water pipe (201), and the water pipe (201) is connected with an external conveying mechanism; the water pipe (201) is connected with a plurality of circular tubes (202); each circular tube (202) is connected with a plurality of spray pipes (203) for spraying cleaning liquid; the storage box (14) is provided with a compartment door (1401); the storage box (14) is provided with a drainage pipe (1402); the storage box (14) is connected with a driving unit; the driving unit is connected with two brush rollers (204), and the driving unit is used to drive the brush rollers (204) to move.

9. The explosion-proof dust removal induced draft fan according to claim 8, characterized in that: It also includes a traction rope 2 (205); the electric winding drum 2 (11) is fixedly connected to and winds up a plurality of traction ropes 2 (205), and the other ends of all the traction ropes 2 (205) are fixedly connected to the filter screen 1 (10).

10. An explosion-proof dust removal induced draft fan according to any one of claims 8 to 9, characterized in that: Each conveying roller 2 (13) is provided with a plurality of limiting grooves (1301) corresponding to the traction rope 2 (205).

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