An explosion-proof dust collector

Abstract

The invention discloses an explosion-proof dust collector, comprising an explosion-proof dust removal box, an exhaust fan and a centrifugal back-spray fan; the explosion-proof dust removal box comprises an upper partition and a lower partition, a filtered bin is between the upper partition and the lower partition, and a bin to be filtered is provided at the lower side of the lower partition; an air inlet nozzle connected to the bin to be filtered is provided on one side of the explosion-proof dust removal box; a plurality of vertical cylindrical anti-static dust filters are fixed in an array at the lower side of the lower partition, the upper air outlet end of each vertical cylindrical anti-static dust filter is connected to a trumpet-shaped air outlet nozzle, and the upper end of the trumpet-shaped air outlet nozzle is connected to the filtered bin; more thorough back-spray cleaning can be implemented on the flexible anti-static filter cartridge.

Description

Technical Field

[0001] The invention belongs to the field of dust removal. Background Art

[0002] Electrostatic dust removal equipment is a highly efficient dust removal equipment that uses a high-voltage electric field to ionize the gas, thereby charging the dust particles. These charged particles will move toward the electrode under the action of the electric field force and settle there, thereby achieving the dust removal effect.

[0003] However, for explosive dust, when there are flammable materials in the dust gas, in order to prevent explosion caused by electrostatic spark discharge, the dust removal equipment for dust gas containing flammable materials cannot use electrostatic dust removal equipment, and can only use filtering dust removal equipment to implement dust removal and filtration. The surface of the filtering structure of the filtering dust removal equipment will continue to adhere to dust as time accumulates, thereby reducing the gas permeability of the filtering device;

[0004] The back-spray self-cleaning of the filter cartridge is the most common self-cleaning method. Its principle is to form gas on the filter wall of the filter cartridge in the opposite direction to the normal filtering process, so that the reverse-flowing gas can wash away the dust attached to the air inlet side of the filter cartridge; but due to the large surface area of ​​the filter cartridge, after the reverse gas supply device inputs a certain flow rate into the filter cartridge, the gas entering the filter cartridge flows out from various places of the filter cartridge. Due to the large overall surface area of ​​the filter cartridge, the flow rate of the reverse airflow at any local position of the filter wall of the filter cartridge is low at this time, and the reverse spray effect is general, which is not enough to completely remove the dust attached to the outer wall of the filter cartridge. Summary of the invention

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an explosion-proof dust collector that can perform more thorough back-spray cleaning on a flexible anti-static filter cartridge.

[0006] Technical solution: To achieve the above-mentioned purpose, an explosion-proof dust collector of the present invention comprises an explosion-proof dust removal box, an exhaust fan and a centrifugal back-jet fan; the explosion-proof dust removal box comprises an upper partition and a lower partition, a filtered bin is between the upper partition and the lower partition, and a bin to be filtered is provided at the lower side of the lower partition; an air inlet nozzle connected to the bin to be filtered is provided on one side of the explosion-proof dust removal box; a plurality of vertical cylindrical anti-static dust filters are fixed in an array at the lower side of the lower partition, and the upper air outlet end of each vertical cylindrical anti-static dust filter is connected to a trumpet-shaped air outlet nozzle, and the upper end of the trumpet-shaped air outlet nozzle is connected to the filtered bin;

[0007] The air inlet end of the exhaust fan is connected to the filtered bin, and the air outlet end is connected to the external environment; a horizontal back-spray gas diversion pipe is arranged above a plurality of trumpet-shaped air outlet nozzles, and the air inlet pipe of the centrifugal back-spray fan is connected to the external environment; the end of the air outlet pipe of the centrifugal back-spray fan is connected to the air inlet end of the back-spray gas diversion pipe; a plurality of downwardly extending back-spray pipes are connected to the lower part of the back-spray gas diversion pipe, each back-spray pipe corresponds to a trumpet-shaped air outlet nozzle coaxially, and the lower end of each back-spray pipe passes coaxially downward through the corresponding trumpet-shaped air outlet nozzle in the vertical cylindrical anti-static dust filter.

[0008] Furthermore, the vertical cylindrical anti-static dust filter includes a flexible anti-static filter cartridge; the lower end of the flexible anti-static filter cartridge is fixedly connected to the lower ring disk along the contour, the upper end of the flexible anti-static filter cartridge is fixedly connected to the upper structure cylinder coaxially along the contour, the upper end of the upper structure cylinder is fixedly connected to the upper ring disk coaxially, the inner circle of the upper ring disk is fixedly connected to the lower end of the trumpet-shaped air outlet nozzle coaxially, and the lower end of the trumpet-shaped air outlet nozzle is connected to the silo in the flexible anti-static filter cartridge.

[0009] Furthermore, a plurality of guide rods are arranged in parallel on the outer periphery of the flexible antistatic filter cartridge, the upper end of each guide rod is fixedly connected to the upper ring disk, and the lower end of each guide rod movably passes through the guide hole on the lower ring disk;

[0010] A spring baffle is fixedly provided on the upper side of each guide rod near the lower ring disk, and a thrust spring is provided on the outer sleeve of a section of the guide rod between each spring baffle and the lower ring disk. Each thrust spring forms a thrust on the lower ring disk. Under the downward thrust of each thrust spring, the flexible anti-static filter cartridge is tightened into a stable cylindrical shape.

[0011] Furthermore, a jet disc is coaxially arranged at the lower end of the flexible anti-static filter cartridge, the jet disc blocks the lower end of the silo, the outer ring of the jet disc slides with the inner wall of the flexible anti-static filter cartridge, and a circle of annular jet ports is arranged on the outer periphery of the jet disc.

[0012] Furthermore, a lower structural cylinder is coaxially fixed to the lower side of the jet disc, an annular inner edge is provided at the lower end of the lower structural cylinder, and a jet disc driving spring which is initially in a compressed state is provided between the lower side of the jet disc and the annular inner edge, and the jet disc driving spring exerts an upward pushing force on the jet disc; a wire disc driving motor is provided within the enclosure of the lower structural cylinder; the output end of the wire disc driving motor drives the connecting wire disc, and the upper end of the traction wire led out of the wire disc is fixedly connected to the jet disc, and the traction wire is a steel wire or a high-strength nylon rope; in the initial state, the jet disc maintains balance under the traction of the traction wire and the thrust of the jet disc driving spring.

[0013] Furthermore, the jet disc includes an upper disc and a lower disc arranged at a distance, and the upper disc and the lower disc are coaxially fixed to each other through a connecting piece at the axis center; a disc-shaped jet gap is formed between the upper disc and the lower disc, and the outer periphery of the disc-shaped jet gap is a circle of annular jet ports; the outer circles of the upper disc and the lower disc are respectively integrally provided with upper and lower ring edges along the contour, and the outer circles of the upper and lower ring edges are movably matched with the inner wall of the flexible anti-static filter cartridge; the annular jet port is between the upper and lower ring edges.

[0014] An air intake shell is integrally arranged on the upper side of the upper disc, and a pressure storage chamber is arranged inside the air intake shell. The lower side of the pressure storage chamber is connected to the central area of ​​the disc-shaped jet gap through a plurality of connecting holes on the upper disc;

[0015] Furthermore, a flexible air guide hose coiled in a conical spiral is coaxially arranged in the silo inside the flexible anti-static filter cartridge, the upper end of the flexible air guide hose is connected to the lower end of the back-spray pipe, and the lower end is connected to the pressure storage bin through a transverse connecting pipe.

[0016] Furthermore, the outer diameter of the back-spray pipe is smaller than the inner diameter of the narrowest part of the trumpet-shaped air outlet nozzle.

[0017] Beneficial effects: The high-pressure gas in the disc-shaped jet gap of the present invention is sprayed outward at high speed toward a narrow area on the upper part of the inner wall of the flexible anti-static filter cartridge through a narrow annular jet port, so that a high-speed back jet flow is formed in the narrow area on the upper part of the flexible anti-static filter cartridge, and the dust attached to the outer wall of the narrow area on the upper part of the flexible anti-static filter cartridge is separated by the back jet of the high-speed airflow, thereby achieving the purpose of back jet cleaning of the narrow area on the upper part of the flexible anti-static filter cartridge. Since the gap of the annular jet port is narrow, the flow rate of the gas sprayed out of the annular jet port can be guaranteed, thereby improving the thoroughness of the back jet self-cleaning;

[0018] At the same time, each wire reel driving motor drives each wire reel to slowly reel in, and each jet disc slowly moves downward under the action of the slow reeling, so that the narrow annular jet port slowly shifts downward, and the annular jet port continuously sprays high-speed airflow to the inner wall of the flexible anti-static filter cartridge at that position during the slow downward shift, and the dust attached to the outer wall of the flexible anti-static filter cartridge from top to bottom is separated by the return spray of the high-speed airflow. When the jet disc descends to the lower end of the inner wall of the flexible anti-static filter cartridge, it returns to the initial state, and at this time, a more thorough return spray cleaning of the flexible anti-static filter cartridge as a whole is just completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structural diagram of the equipment;

[0020] Figure 2 It is a schematic diagram of the structure of a single vertical cylindrical anti-static dust filter;

[0021] Figure 3 for Figure 2A cross-sectional view of

[0022] Figure 4 for Figure 3 An enlarged schematic diagram of the mark 18;

[0023] Figure 5 This is a schematic diagram of the internal structure of the flexible anti-static filter cartridge;

[0024] Figure 6 This is a cross-sectional view of the jet disc;

[0025] Figure 7 for Figure 5 Schematic diagram from another perspective. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] As attached Figures 1 to 7 An explosion-proof dust collector as shown in Figure 1 The explosion-proof dust removal box 100 includes an upper partition 1 and a lower partition 4. The upper side of the upper partition 1 is an equipment bin 101 connected to the outside world. The filtered bin 3 is between the upper partition 1 and the lower partition 4. The lower side of the lower partition 4 is a bin to be filtered 9. The lower end of the bin to be filtered 9 is detachably provided with a dust storage box 8; one side of the explosion-proof dust removal box 100 is provided with an air inlet nozzle 10 connected to the bin to be filtered 9; a plurality of vertical cylindrical anti-static dust filters 6 are fixedly installed in an array on the lower side of the lower partition 4, and the upper air outlet end of each vertical cylindrical anti-static dust filter 6 is connected to a trumpet-shaped outlet. The air nozzle 5, the upper end of the trumpet-shaped air outlet nozzle 5 is connected to the filtered bin 3; an exhaust fan 14 and a centrifugal back-jet fan 13 are fixedly installed in the equipment bin 101; the air inlet end of the exhaust fan 14 is connected to the filtered bin 3, and the air outlet end is connected to the external environment; a horizontal back-jet gas shunt pipe 2 is arranged above a plurality of trumpet-shaped air outlet nozzles 5, and the air inlet pipe 12 of the centrifugal back-jet fan 13 is connected to the external environment; the end of the air outlet pipe 11 of the centrifugal back-jet fan 13 is connected to the air inlet end of the back-jet gas shunt pipe 2; there is a solenoid valve in the air outlet pipe 11, and the solenoid valve is closed during normal dust removal and filtration operation of the device.

[0028] like Figure 1 A plurality of downwardly extending back-spray pipes 7 are vertically connected to the lower part of the back-spray gas diversion pipe 2, and each back-spray pipe 7 corresponds to a trumpet-shaped gas outlet nozzle 5 coaxially, and the lower end of each back-spray pipe 7 coaxially passes downward through the corresponding trumpet-shaped gas outlet nozzle 5 into the vertical cylindrical anti-static dust filter 6; in order to facilitate the upward exhaust of the trumpet-shaped gas outlet nozzle 5, the outer diameter of the back-spray pipe 7 is smaller than the inner diameter of the narrowest part of the trumpet-shaped gas outlet nozzle 5.

[0029] like Figure 2 and 3The vertical cylindrical anti-static dust filter 6 includes a flexible anti-static filter cartridge 16, which is made of anti-static nano-polyester coating material; the lower end of the flexible anti-static filter cartridge 16 is fixedly connected to the lower ring disk 19 along the contour, and the upper end of the flexible anti-static filter cartridge 16 is coaxially fixedly connected to the upper structure cylinder 15 along the contour, and the upper end of the upper structure cylinder 15 is coaxially fixedly connected to the upper ring disk 22, and the inner circle of the upper ring disk 22 is coaxially fixedly connected to the lower end of the trumpet-shaped air outlet nozzle 5, and the lower end of the trumpet-shaped air outlet nozzle 5 is connected to the silo 20 in the flexible anti-static filter cartridge 16; the upper side of the upper ring disk 22 is fixed to the lower surface of the lower partition 4.

[0030] A plurality of guide rods 21 are arranged in parallel on the outer circumference of the flexible antistatic filter cartridge 16, the upper end of each guide rod 21 is fixedly connected to the upper ring disk 22, and the lower end of each guide rod 21 is movable through the guide hole on the lower ring disk 19; under the common constraint of the plurality of guide rods 21, the lower ring disk 19 and the upper ring disk 22 remain coaxial; a spring baffle 50 is fixedly arranged on the upper side of each guide rod 21 near the lower ring disk 19, and a section of the guide rod 21 between each spring baffle 50 and the lower ring disk 19 is covered with a thrust spring 51, and each thrust spring 51 forms a thrust on the lower ring disk 19, and under the downward thrust of each thrust spring 51, the flexible antistatic filter cartridge 16 is tightened into a stable cylindrical shape.

[0031] like Figure 3 , 4 , 5, 6, 7, a jet disc 25 is coaxially arranged at the lower end of the flexible antistatic filter cartridge 16, the jet disc 25 blocks the lower end of the silo 20, the outer ring of the jet disc 25 is slidably matched with the inner wall of the flexible antistatic filter cartridge 16, a ring-shaped jet port 28 is arranged on the outer periphery of the jet disc 25, a lower structural cylinder 17 is coaxially fixed to the lower side of the jet disc 25, an annular inner edge 42 is arranged at the lower end of the lower structural cylinder 17, a jet disc driving spring 43 which is initially in a compressed state is arranged between the lower side of the jet disc 25 and the annular inner edge 42, and the jet disc driving spring 43 is arranged to drive the jet The reel 25 forms an upward pushing force; a wire reel drive motor 29 is arranged within the enclosed range of the lower structure cylinder 17, and the shell of the wire reel drive motor 29 is connected to the annular inner edge 42 through the motor mounting arm 41, and the wire reel drive motor 29 is a stepper motor with power-off brake; the output end of the wire reel drive motor 29 drives the connected wire reel 30, and the upper end of the traction line 31 led out from the wire reel 30 is fixedly connected to the jet reel 25, and the traction line 31 is a steel wire or a high-strength nylon rope; in the initial state, the jet reel 25 maintains balance under the traction of the traction line 31 and the thrust of the jet reel drive spring 43.

[0032] The jet disc 25 includes an upper disc 25a and a lower disc 25b which are spaced apart from each other, and the upper disc 25a and the lower disc 25b are fixed to each other coaxially through a connecting piece at the axis center; a disc-shaped jet gap 34 is formed between the upper disc 25a and the lower disc 25b, and the outer circumference of the disc-shaped jet gap 34 is a circle of annular jet ports 28; the outer circles of the upper disc 25a and the lower disc 25b are respectively integrally provided with an upper ring edge 40a and a lower ring edge 40b along the contour, and the outer circles of the upper ring edge 40a and the lower ring edge 40b are movably matched with the inner wall of the flexible antistatic filter cartridge 16; the annular jet port 28 is between the upper ring edge 40a and the lower ring edge 40b; for a clearer expression, the thickness of the annular jet port 28 in the attached figure is consistent with that of the disc-shaped jet gap 34. In fact, in order to ensure the flow rate of the annular jet port 28, the annular jet port 28 can be designed to be narrower than the disc-shaped jet gap 34.

[0033] An air intake shell 26 is integrally provided on the upper side of the upper disc 25a, and a pressure storage bin 32 is located inside the air intake shell 26. The lower side of the pressure storage bin 32 is connected to the central area of ​​the disc-shaped jet gap 34 through a plurality of connecting holes 33 on the upper disc 25a; a flexible air guide hose 23 spirally wound in a conical shape is coaxially arranged in the silo 20 in the flexible anti-static filter cartridge 16, and the upper end of the flexible air guide hose 23 is connected to the lower end of the back-spray pipe 7, and the lower end is connected to the pressure storage bin 32 through a transverse connecting pipe 27.

[0034] Technical effects and working principles:

[0035] Normal dust removal process:

[0036] In the initial state, each jet disc 25 blocks the lower end of the corresponding silo 20, and the jet disc 25 maintains balance under the traction of the traction line 31 and the thrust of the jet disc driving spring 43, the centrifugal reverse jet fan 13 stops running, and the electromagnetic valve in the air outlet pipe 11 is closed; the exhaust fan 14 is started, and a negative pressure is formed in the filtered bin 3 and the bin to be filtered 9 under the suction of the exhaust fan 14. Under the action of the negative pressure, the dust gas to be filtered is first continuously sucked into the bin to be filtered 9 through the air inlet nozzle 10, and then the dust entering the bin to be filtered 9 After the gas is filtered through each flexible antistatic filter cartridge 16, the filtered gas enters each silo 20, so that each flexible antistatic filter cartridge 16 adheres to the filtered dust, and the filtered gas of each silo 20 flows upward through the trumpet-shaped air outlet nozzle 5 into the filtered bin 3, and is finally discharged continuously under the suction of the exhaust fan 14; at the same time, the dust attached to and filtered by each flexible antistatic filter cartridge 16 gradually accumulates, which reduces the air permeability of each flexible antistatic filter cartridge 16, thereby reducing the gas permeation efficiency.

[0037] The back-spray self-cleaning method of the flexible anti-static filter cartridge 16:

[0038] First, the exhaust fan 14 is controlled to stop running, and then the wire drum drive motor 29 is controlled to drive each wire drum 30 to gradually release the wire. Each jet disk 25 gradually moves upward under the upward thrust of the jet disk drive spring 43 until the jet disk 25 rises to the upper part of the flexible anti-static filter cartridge 16, and the wire drum 30 releases the wire. At this time, the solenoid valve on the air outlet pipe 11 is opened, and then the centrifugal back-jet fan 13 is started. A constant flow of gas is ejected from the air outlet pipe 11 of the centrifugal back-jet fan 13 and is pressed into each back-jet pipe 7 through the back-jet gas diverter pipe 2. Subsequently, the high-pressure gas pressed into the back-jet pipe 7 is transmitted to the pressure storage bin 32 through the flexible air guide hose 23, so that a continuous positive pressure is formed in the pressure storage bin 32. Subsequently, the pressure storage bin 32 is The high-pressure gas in the bin 32 is pressed into the disc-shaped jet gap 34 through a plurality of connecting holes 33. Finally, the high-pressure gas in the disc-shaped jet gap 34 is sprayed outward at high speed through the narrow annular jet port 28 toward a narrow area on the upper inner wall of the flexible anti-static filter cartridge 16, so that a high-speed return jet flow is formed in a narrow area on the upper part of the flexible anti-static filter cartridge 16. The dust attached to the outer wall of the narrow area on the upper part of the flexible anti-static filter cartridge 16 is detached by the return jet of the high-speed airflow, thereby achieving the purpose of return jet cleaning of the narrow area on the upper part of the flexible anti-static filter cartridge 16. Since the gap of the annular jet port 28 is narrow, the flow rate of the gas sprayed out of the annular jet port 28 can be guaranteed, thereby improving the thoroughness of the return jet self-cleaning.

[0039] At the same time, each wire drum driving motor 29 is controlled to drive each wire drum 30 to perform a slow winding action. Each jet disk 25 slowly moves downward under the slow winding action of each wire drum 30, so that the narrow annular jet port 28 slowly shifts downward. During the process of the annular jet port 28 slowly shifting downward, a high-speed airflow is continuously sprayed to the inner wall of the flexible anti-static filter cartridge 16 at that position, and the dust attached to the outer wall of the flexible anti-static filter cartridge 16 from top to bottom is detached by the back spray of the high-speed airflow. When the jet disk 25 descends to the lower end position of the inner wall of the flexible anti-static filter cartridge 16, it returns to the initial state. At this time, a more thorough back spray cleaning of the flexible anti-static filter cartridge 16 as a whole is just completed.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An explosion-proof dust collector, characterized in that: The invention comprises an explosion-proof dust removal box (100), an exhaust fan (14) and a centrifugal back-jet fan (13); the explosion-proof dust removal box (100) comprises an upper partition (1) and a lower partition (4); a filtered bin (3) is located between the upper partition (1) and the lower partition (4); a bin to be filtered (9) is located below the lower partition (4); an air inlet nozzle (10) connected to the bin to be filtered (9) is provided on one side of the explosion-proof dust removal box (100); a plurality of vertical cylindrical antistatic dust filters (6) are fixed in an array on the lower side of the lower partition (4); the upper air outlet end of each vertical cylindrical antistatic dust filter (6) is connected to a trumpet-shaped air outlet nozzle (5); the upper end of the trumpet-shaped air outlet nozzle (5) is connected to the filtered bin (3); The air inlet end of the exhaust fan (14) is connected to the filtered bin (3), and the air outlet end is connected to the external environment; a horizontal back-spray gas shunt pipe (2) is arranged above a plurality of trumpet-shaped air outlet nozzles (5), and the air inlet pipe (12) of the centrifugal back-spray fan (13) is connected to the external environment; the end of the air outlet pipe (11) of the centrifugal back-spray fan (13) is connected to the air inlet end of the back-spray gas shunt pipe (2); a plurality of downwardly extending back-spray pipes (7) are connected to the lower part of the back-spray gas shunt pipe (2), each back-spray pipe (7) is coaxially corresponding to a trumpet-shaped air outlet nozzle (5), and the lower end of each back-spray pipe (7) is coaxially downwardly passed through the corresponding trumpet-shaped air outlet nozzle (5) into the vertical cylindrical anti-static dust filter (6); The vertical cylindrical antistatic dust filter (6) comprises a flexible antistatic filter cartridge (16); the lower end of the flexible antistatic filter cartridge (16) is fixedly connected to a lower ring disk (19) along its contour, the upper end of the flexible antistatic filter cartridge (16) is fixedly connected to an upper structural cylinder (15) coaxially along its contour, the upper end of the upper structural cylinder (15) is fixedly connected to an upper ring disk (22) coaxially, the inner circle of the upper ring disk (22) is fixedly connected to the lower end of a trumpet-shaped air outlet nozzle (5) coaxially, and the lower end of the trumpet-shaped air outlet nozzle (5) is connected to a silo (20) in the flexible antistatic filter cartridge (16); A plurality of guide rods (21) are arranged in parallel on the outer periphery of the flexible antistatic filter cartridge (16), the upper end of each guide rod (21) being fixedly connected to the upper ring disk (22), and the lower end of each guide rod (21) being movable through the guide hole on the lower ring disk (19); A spring stopper (50) is fixedly provided on the upper side of each guide rod (21) near the lower ring disk (19); a section of the guide rod (21) between each spring stopper (50) and the lower ring disk (19) is covered with a thrust spring (51); each thrust spring (51) exerts a thrust on the lower ring disk (19); and under the downward thrust of each thrust spring (51), the flexible antistatic filter cartridge (16) is tightened into a stable cylindrical shape.

2. An explosion-proof dust collector according to claim 1, characterized in that: A jet disc (25) is coaxially arranged at the lower end of the flexible antistatic filter cartridge (16), the jet disc (25) blocks the lower end of the silo (20), the outer ring of the jet disc (25) is slidably matched with the inner wall of the flexible antistatic filter cartridge (16), and the outer periphery of the jet disc (25) is provided with a circle of annular jet ports (28).

3. An explosion-proof dust collector according to claim 2, characterized in that: A lower structural cylinder (17) is coaxially fixed to the lower side of the jet disc (25), and an annular inner edge (42) is provided at the lower end of the lower structural cylinder (17). An jet disc driving spring (43) which is initially in a compressed state is provided between the lower side of the jet disc (25) and the annular inner edge (42), and the jet disc driving spring (43) exerts an upward pushing force on the jet disc (25). A wire disc driving motor (29) is provided within the enclosed range of the lower structural cylinder (17). The output end of the wire disc driving motor (29) drives the connecting wire disc (30), and the upper end of the traction wire (31) led out of the wire disc (30) is fixedly connected to the jet disc (25), and the traction wire (31) is a steel wire or a high-strength nylon rope. In the initial state, the jet disc (25) maintains balance under the pulling of the traction wire (31) and the thrust of the jet disc driving spring (43).

4. An explosion-proof dust collector according to claim 3, characterized in that: The jet disc (25) comprises an upper disc (25a) and a lower disc (25b) which are spaced apart from each other, and the upper disc (25a) and the lower disc (25b) are fixed to each other coaxially via a connecting piece at the axis center; a disc-shaped jet gap (34) is formed between the upper disc (25a) and the lower disc (25b), and the outer circumference of the disc-shaped jet gap (34) is a circle of the annular jet port (28); the outer circles of the upper disc (25a) and the lower disc (25b) are respectively integrally provided with an upper ring edge (40a) and a lower ring edge (40b) along the contour, and the outer circles of the upper ring edge (40a) and the lower ring edge (40b) are both movably matched with the inner wall of the flexible antistatic filter cartridge (16); the annular jet port (28) is between the upper ring edge (40a) and the lower ring edge (40b); An air intake shell (26) is integrally provided on the upper side of the upper disc (25a), and a pressure storage chamber (32) is located inside the air intake shell (26). The lower side of the pressure storage chamber is connected to the central area of ​​the disc-shaped jet gap (34) through a plurality of connecting holes (33) on the upper disc (25a).

5. An explosion-proof dust collector according to claim 4, characterized in that: A flexible air guide hose (23) that is spirally wound in a cone shape is coaxially arranged in the silo (20) within the flexible antistatic filter cartridge (16); the upper end of the flexible air guide hose (23) is connected to the lower end of the back-spraying pipe (7), and the lower end is connected to the pressure storage bin (32) via a transverse connecting pipe (27).

6. The explosion-proof dust collector according to claim 1, characterized in that: The outer diameter of the reverse spray pipe (7) is smaller than the inner diameter of the narrowest part of the trumpet-shaped air outlet nozzle (5).

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