Pulse blowback type filter cartridge gas-solid separator for cutting waste of density board

Abstract

The invention relates to the technical field of dust removers, and discloses a pulse blowback type filter cartridge gas-solid separator for density board cutting waste, which comprises a filter cloth type buffer structure, an air bag type holding structure and a maximum atmospheric pressure control structure, a valve plate capable of controlling gas around the annular air bag to flow outwards and a second spiral spring generating upward elastic pressure on the valve plate are arranged in the annular air bag. According to the pulse back-blowing type filter drum gas-solid separator for the density board cutting waste, when the filter cloth is suddenly acted by high-pressure gas, the filter cloth can expand towards the periphery, and the bottom of the filter cloth can adaptively move upwards under the buffering action of the spiral spring, so that the filter cloth is prevented from being damaged on the premise that the influence on the expansion of the filter cloth is reduced, and the service life of the filter cloth is prolonged. The intensity of instantaneous acting force of gas on the filter cloth is relieved, so that the effective working time of the filter cloth is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust collectors, in particular to a pulse back-blowing type filter cartridge gas-solid separator for density board cutting waste. BACKGROUND

[0002] Density board cutting produces a large amount of fine wood fiber dust and debris particles, which enter the separator with the dust suction airflow of the cutting equipment. The high-precision filter material (such as polyester fiber membrane filter material) of the filter cartridge can intercept micron-sized dust particles in the airflow, achieving rapid gas-solid separation, with a separation efficiency of over 99%, avoiding direct discharge or diffusion of dust with the airflow.

[0003] A pulse dust collector is disclosed in Chinese patent application CN107754473A, which includes a box body, a clean gas cavity, a filter cavity, an air inlet pipe, an air outlet pipe, a jet pipe, a pulse valve, a plurality of filter cloths, a nozzle, a pre-dust plate, a flow guide plate, and a counterweight. The device collects dust in flue gas twice, so that the gas discharged from the air outlet pipe meets industrial standards, achieving the purpose of improving dust removal effect in the industry.

[0004] However, during the cleaning process, workers will directly clean the dust without stopping the work of other equipment. First, clean a few groups of filter cloths, and the remaining filter cloths can normally filter, alternating cleaning. However, in the process of alternating cleaning, the dust that falls off the filter cloth is easy to reattach to the surface of the adjacent filter cloth that has just been cleaned after detaching from the surface of the filter cloth, resulting in less than ideal cleaning effect and the need for frequent cleaning. SUMMARY

[0005] To overcome the shortcomings of the prior art, the present application provides a pulse back-blowing type filter cartridge gas-solid separator for density board cutting waste. When the filter cloth is suddenly affected by high-pressure gas, the filter cloth will expand outward. The bottom of the filter cloth can move upward adaptively under the buffering action of the spiral spring, thereby reducing the impact of the filter cloth expansion and relieving the instantaneous force intensity of the gas on the filter cloth, improving the effective working time of the filter cloth, and solving the above technical problems.

[0006] To achieve the above object, the present application provides the following technical scheme: A pulse back-blowing type filter cartridge gas-solid separator for cutting waste of density board, comprising a vertical dust removal cabinet with support legs mounted at the bottom, a dust removal cavity arranged inside the vertical dust removal cabinet, a gas flow cavity arranged above the dust removal cavity through a partition plate, a dust discharge channel arranged at the bottom of the dust removal cavity, a mixed gas inlet channel arranged at the side of the vertical dust removal cabinet and used for discharging gas to the side of the bottom area of the dust removal cavity, a gas discharge channel arranged at the side of the vertical dust removal cabinet and used for discharging gas in the gas flow cavity, a gas flow hole arranged inside the partition plate, a gas jet arranged inside the gas flow hole and used for discharging high-pressure gas into the gas flow hole, and a gas distribution plate mounted inside the vertical dust removal cabinet and capable of producing downward blocking effect on the gas from the direction of the mixed gas inlet channel; further comprising a filter cloth type buffer structure, which is internally provided with a filter cloth mounted at the bottom of the gas flow hole and used for filtering gas, a longitudinal movable shaft moving longitudinally along the bottom end of the filter cloth, and a first spiral spring producing downward elastic pressure on the bottom of the filter cloth through the longitudinal movable shaft; a gas bag type holding structure, which is internally provided with an annular gas bag sleeved around the shaft body at the bottom of the longitudinal movable shaft and capable of wrapping and holding the shaft body of the longitudinal movable shaft after being subjected to gas pressure, thereby providing frictional damping; and a maximum gas pressure control structure, which is internally provided with a valve plate capable of controlling the outward flow of gas around the annular gas bag and a second spiral spring producing upward elastic pressure on the valve plate.

[0007] Preferably, the filter cloth type buffer structure comprises a top plate body and a bottom plate body, the filter cloth is embedded between the top plate body and the bottom plate body, the top end surface of the top plate body is provided with an internally recessed internal thread groove, the top plate body is provided with an internal thread structure at the circumferential side of the internal thread groove, the inside of the top plate body is provided with a gas flow port communicating the internal thread groove and the middle area of the filter cloth, the middle of the bottom plate body is provided with a polygonal rod hole, the longitudinal movable shaft is inserted into the inside of the polygonal rod hole, the top end of the longitudinal movable shaft is mounted with a top limiting plate, and the first spiral spring is sleeved around the longitudinal movable shaft between the top limiting plate and the bottom plate body.

[0008] Preferably, the top plate body is mounted on the bottom surface of the partition plate through the internal thread structure and the external thread structure arranged around the protruding structure at the bottom end of the gas flow hole.

[0009] Preferably, the structure shape of the cross section of the polygonal rod hole is consistent with the structure shape of the cross section of the longitudinal movable shaft, both are polygonal structures, and the structure size of the cross section of the polygonal rod hole matches the structure size of the cross section of the longitudinal movable shaft.

[0010] Preferably, the air bag type embracing structure comprises a hollow disc-shaped shell, the circumferential side of which is provided with a transverse connecting rod, the end of which is fixedly installed on the side wall of the vertical dust removal cabinet through a first fixed plate, the center of the hollow disc-shaped shell is provided with a shaft hole which is sleeved on the outer periphery of the shaft body at the bottom area of the longitudinal movable shaft, the outer periphery of the hollow disc-shaped shell at the middle area of the shaft hole is provided with an annular gas storage cavity, the hollow disc-shaped shell is embedded with an annular air bag at the intersection of the annular gas storage cavity and the shaft hole, the side of the hollow disc-shaped shell is provided with a gas injection hole which is communicated with the annular gas storage cavity, and the inside of the gas injection hole is provided with a gas valve, and the inside of the hollow disc-shaped shell is provided with a gas compensation hole which is communicated with the bottom end surface and the gas injection hole.

[0011] Preferably, the annular air bag is made of an annular structure made of elastic and wear-resistant material.

[0012] Preferably, the maximum gas pressure control structure comprises a longitudinal hollow shell, the top of which is provided with a second fixed plate which is fixedly installed on the bottom surface of the hollow disc-shaped shell, the inside of the longitudinal hollow shell is provided with a longitudinal movable cavity, the top of the longitudinal hollow shell is provided with an air inlet which is communicated with the gas compensation hole, the bottom end of the longitudinal hollow shell is provided with an air outlet which discharges gas outward, the longitudinal hollow shell is provided with a valve plate which is axially movable along the longitudinal movable cavity at the inside of the longitudinal movable cavity, the upper end surface of the valve plate is embedded with a sealing gasket which protrudes upward and can be abutted on the bottom of the air inlet, the circumferential side of the valve plate is provided with a ventilation groove for the downward flow of gas, and the bottom end of the valve plate is provided with a second spiral spring which is in a compressed state.

[0013] Preferably, it further comprises a spiral dust discharge structure which is fixedly installed at the bottom end of the dust discharge channel, the inside of which is provided with a spiral impeller which can drive the dust falling around it to be discharged outward when rotating, and a driving motor which drives the spiral impeller to rotate.

[0014] Preferably, the spiral dust discharge structure comprises a transverse hollow pipe, the inside of which is provided with a dust conveying hole which is open at one end, the circumferential side of the transverse hollow pipe is provided with a top dust inflow channel which is of an integral structure and is used to communicate the bottom port of the dust discharge channel and the dust conveying hole, the solid end surface of the transverse hollow pipe is fixedly installed with a driving motor, the rotor of the driving motor penetrates through the transverse hollow pipe and extends to the inside of the dust conveying hole, and the rotor is provided with a spiral impeller on the shaft body at the inside of the dust conveying hole.

[0015] Preferably, there is a gap between the side of the spiral impeller and the inner wall of the dust conveying hole, and the gap is not enough for the dust to flow laterally along it.

[0016] Compared with the prior art, the application provides a pulse back-blowing type filter cartridge gas-solid separator for density board cutting waste, which has the following beneficial effects: The pulse back-blowing type filter cartridge gas-solid separator for density board cutting waste has the following beneficial effects: The variable damping system formed by the annular air bag and the pressure valve control is used for working, when the filter cloth is suddenly affected by high-pressure gas, the filter cloth will expand to the surrounding, and the bottom of the filter cloth will adaptively move up under the buffering effect of the helical spring, so that the instantaneous force intensity of the gas on the filter cloth is relieved under the premise of reducing the influence on the expansion of the filter cloth, and the effective working time of the filter cloth is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the application; Figure 2 It is a full cross-sectional structure schematic view of the application; Figure 3 It is a perspective view of the filter cloth type buffer structure in the application; Figure 4 It is a perspective cross-sectional view of the filter cloth type buffer structure in the application; Figure 5 It is a perspective view of the air bag type holding structure in the application; Figure 6 It is a perspective cross-sectional view of the air bag type holding structure in the application; Figure 7 It is a perspective view of the maximum air pressure control structure in the application; Figure 8 It is a perspective cross-sectional view of the maximum air pressure control structure in the application; Figure 9 It is a full cross-sectional structure schematic view of the helical dust discharge structure in the application.

[0018] Wherein: 1, vertical dust removal cabinet; 2, supporting leg; 3, dust removal cavity; 4, partition; 5, gas flow cavity; 6, dust discharge channel; 7, mixed gas inlet channel; 8, gas discharge channel; 9, gas flow hole; 10, gas nozzle; 11, gas distribution plate; 12, filter cloth type buffer structure; 121, top plate body; 122, bottom plate body; 123, internal thread groove; 124, internal thread structure; 125, gas flow port; 126, polygonal rod hole; 127, filter cloth; 128, longitudinal movable shaft; 129, top limiting plate; 1210, first spiral spring; 13, air bag type holding structure; 131, hollow disc-shaped shell; 132, shaft hole; 133, annular gas storage cavity; 134, annular air bag; 135, gas injection hole; 136, gas valve; 137, gas compensation hole; 138, transverse connecting rod; 139, first fixed plate; 14, maximum gas pressure control structure; 141, longitudinal hollow shell; 142, second fixed plate; 143, longitudinal movable cavity; 144, gas inlet; 145, gas outlet; 146, valve plate; 147, gasket; 148, air passage; 149, second spiral spring; 15, spiral dust discharge structure; 151, transverse hollow pipe; 152, dust conveying hole; 153, top dust inflow channel; 154, driving motor; 155, rotor; 156, spiral impeller. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0020] Please refer to Figure 1 and Figure 2The utility model provides a kind of pulse backflushing type filter cartridge gas-solid separator for density board cutting waste, including vertical dust removal cabinet 1 with support leg 2 is installed in bottom, dust removal cavity 3 is arranged in vertical dust removal cabinet 1 inside, gas flow cavity 5 is arranged in dust removal cavity 3 top by partition 4, dust discharge channel 6 is arranged in dust removal cavity 3 bottom, mixed gas inlet channel 7 is arranged in the side of vertical dust removal cabinet 1 and is used to discharge gas to the side of dust removal cavity 3 bottom area, gas discharge channel 8 is arranged in the side of vertical dust removal cabinet 1 and is used to discharge gas in gas flow cavity 5, gas flow hole 9 is arranged in the inside of partition 4, and high-pressure gas is discharged to the inside of gas flow hole 9 by gas jet 10, and gas distribution plate 11 is installed in the inside of vertical dust removal cabinet 1 and can generate downward blocking effect to the gas from the direction of mixed gas inlet channel 7, under the action of air blower, gas enters in dust discharge channel 6, under the action of gas distribution plate 11, some dust of larger particle size enters in dust discharge channel 6 under the action of inertia, and smaller dust and air are filtered, and finally discharged outward through gas flow hole 9 and gas discharge channel 8, while, a certain amount of high-pressure gas needs to be compressed in external air tank, and the control of pulse electromagnetic valve needs to rely on pulse controller, only when pulse controller is opened, high-pressure air can be released instantaneously by gas jet 10.

[0021] In order to reduce the impact effect of pulse air pressure on filter cloth 127, please refer to Figure 1 、 Figure 2 、 Figure 3 And Figure 4 , filter cloth type buffer structure 12 needs to be arranged, which is internally provided with filter cloth 127 installed at the bottom of gas flow hole 9 and used for filtering gas, longitudinal movable shaft 128 moving longitudinally with the bottom end of filter cloth 127, and first spiral spring 1210 generating downward elastic pressure on the bottom of filter cloth 127 through longitudinal movable shaft 128, when pulse controller inputs signal to pulse electromagnetic valve, pulse electromagnetic valve is opened, high-pressure gas in air tank is sprayed instantaneously to the inside of filter cloth 127 through gas jet 10, filter cloth 127 through which high-pressure gas passes will instantaneously expand outward, at this time, filter cloth 127 generates upward driving torque on bottom plate body 122, at this time, first spiral spring 1210 is compressed under stress, and in the process of compression, filter cloth 127 can buffer the impact force of pulse air pressure, and adaptive upward movement phenomenon occurs, so that the instantaneous force intensity of gas on filter cloth 127 is relieved under the premise of reducing the influence on the expansion of filter cloth 127, to improve the effective working time of filter cloth 127, wherein annular air bag 134 generates radial pressure on longitudinal movable shaft 128 through expansion, to generate friction force, which acts together with first spiral spring 1210 to consume the kinetic energy of filter cloth 127 expansion.

[0022] The specific structure of the filter cloth type buffer structure 12 will be described with reference to Figure 3 and Figure 4 , including a top plate body 121 and a bottom plate body 122, a filter cloth 127 is embedded between the top plate body 121 and the bottom plate body 122, an inner threaded groove 123 is arranged on the upper end surface of the top plate body 121, an inner threaded structure 124 is arranged on the circumferential side surface of the inner threaded groove 123, in order to realize detachable connection, the top plate body 121 is required to be installed on the bottom surface of the partition plate 4 through the inner threaded structure 124 and the outer threaded structure arranged on the outer periphery of the protruding structure at the bottom end of the gas flow hole 9, a gas flow hole 125 is arranged in the inside of the top plate body 121 and communicates with the inner threaded groove 123 and the middle area of the filter cloth 127, a polygonal rod hole 126 is arranged in the middle of the bottom plate body 122, a longitudinally movable longitudinal movable shaft 128 is inserted into the inside of the polygonal rod hole 126, in order to prevent the self-rotation phenomenon of the components, the cross-sectional structure shape of the polygonal rod hole 126 is required to be consistent with the cross-sectional structure shape of the longitudinal movable shaft 128, both are polygonal structures, and the cross-sectional structure size of the polygonal rod hole 126 is matched with the cross-sectional structure size of the longitudinal movable shaft 128, a top limiting plate 129 is installed on the top end of the longitudinal movable shaft 128, and a first spiral spring 1210 is sleeved on the longitudinal movable shaft 128 between the top limiting plate 129 and the bottom plate body 122.

[0023] In order to realize the elastic strength adjustment capability of the first spiral spring 1210, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6, need to set the air bag type holding structure 13, which is provided with the shaft body of the bottom of the longitudinal movable shaft 128 is placed in the surrounding and after the inflation and holding of the longitudinal movable shaft 128 by the gas pressure, the contact pressure between the annular air bag 134 and the shaft body is adjusted to change the frictional damping force when the longitudinal movable shaft moves, so as to cooperate with the first spiral spring 1210 to buffer the pulse impact force of the filter cloth. The annular air bag 134 is manually adjusted to control the spacing between the top limiting plate 129 and the bottom plate 122, so as to control the elastic strength of the first spiral spring 1210 in the spacing, thereby adjusting the buffering degree of the filter cloth 127 when subjected to pulse air pressure. The specific control is: using the inflation equipment to fill gas into the inside of the gas injection hole 135, the gas will make the periphery of the annular air bag 134 affected by the pressure, so that the annular air bag 134 is tightly attached to the circumferential side of the longitudinal movable shaft 128. It should be noted that the wrapping and holding of the shaft body of the longitudinal movable shaft 128 is not completely locked in the axial freedom of the longitudinal movable shaft 128, but provides a controllable sliding friction force, which is smaller than the maximum lifting force generated when the filter cloth 127 expands, so as to allow the longitudinal movable shaft 128 to move axially with damping when subjected to pulse impact, which prevents damage to the filter cloth 127 and avoids the buffering failure caused by rigid locking.

[0024] For the specific structure of the air bag type holding structure 13, please refer to Figure 5 and Figure 6 , including a hollow disc-shaped shell 131, the circumferential side of the hollow disc-shaped shell 131 is provided with a transverse connecting rod 138, the end of the transverse connecting rod 138 is fixedly installed on the side wall of the vertical dust removal cabinet 1 through a first fixed plate 139, the center of the hollow disc-shaped shell 131 is provided with a shaft hole 132 which is placed around the shaft body of the bottom region of the longitudinal movable shaft 128, the hollow disc-shaped shell 131 is provided with a ring-shaped gas storage cavity 133 at the periphery of the middle region of the shaft hole 132, the hollow disc-shaped shell 131 is embedded with an annular air bag 134 at the intersection of the ring-shaped gas storage cavity 133 and the shaft hole 132. In order to effectively wrap and hold, the annular air bag 134 needs to be made of an annular structure made of elastic and wear-resistant material, the side of the hollow disc-shaped shell 131 is provided with a gas injection hole 135 communicating with the ring-shaped gas storage cavity 133, and the gas injection hole 135 is provided with a gas valve 136 inside, the inside of the hollow disc-shaped shell 131 is provided with a gas compensation hole 137 communicating with the bottom end face and the gas injection hole 135, wherein the gas valve 136 is an on-off valve for inflation and gas flow control.

[0025] In order to control the maximum holding degree of the annular air bag 134, thereby improving the stability of the equipment during pulse dust removal work, please refer to Figure 1 ,Figure 7 And Figure 8 , need to set the maximum air pressure control structure 14, which is provided with a valve plate 146 inside the control ring-shaped air bag 134 around the gas to flow out and the valve plate 146 to produce the second spring 149 upward elastic pressure, when the air pressure value inside the ring-shaped air storage cavity 133 is greater than the elastic strength of the second spring 149, the gas pressure will make the valve plate 146 move down, the corresponding gas will flow out through the air inlet 144, air slot 148 and exhaust port 145, therefore, the ring-shaped air bag 134 to the longitudinal activity shaft 128 tight degree has been effectively controlled, when the system set air bag pressure is too high, may lead to friction greater than the pulse impact force, so as to cause the longitudinal activity shaft 128 is locked and can't move buffer or when the air bag is extruded by external pressure surge has the risk of burst, air pressure will overcome the elastic force of the second spring 149 to push away the valve plate 146 to release pressure, the setting of the maximum air pressure control structure 14 ensures that the air pressure in the storage cavity is always maintained in the best range which can provide enough friction damping but not lock the shaft, realizes the adaptive upper limit control of damping force, thereby improving the stability of the equipment when the pulse dedusting work, when the pulse airflow is too strong to cause the filter cloth 127 to swell, the longitudinal activity shaft 128 movement may cause the pressure in the ring-shaped air bag 134 to increase abnormally, at this time the valve plate 146 opens to release pressure, prevent the filter cloth 127 from tearing due to excessive damping, in addition, the air valve 136 opening pressure is less than the ring-shaped air bag 134 burst pressure.

[0026] For the specific structure of the maximum air pressure control structure 14, please refer to Figure 7 And Figure 8 , including longitudinal hollow shell 141, the top of the longitudinal hollow shell 141 is provided with the second fixed plate 142 fixedly installed on the bottom surface of the hollow disc-shaped shell 131, the inside of the longitudinal hollow shell 141 is provided with a longitudinal activity cavity 143, the top of the longitudinal hollow shell 141 is provided with an air inlet 144 communicating with the gas compensation hole 137, the bottom end of the longitudinal hollow shell 141 is provided with an exhaust port 145 discharging gas outward, the longitudinal hollow shell 141 is placed in the inside of the longitudinal activity cavity 143 and has a valve plate 146 which can move axially along the longitudinal activity cavity 143, the upper end surface of the valve plate 146 is embedded with a sealing pad 147 which protrudes upward and can be in contact with the bottom of the air inlet 144, the circumferential side of the valve plate 146 is provided with an air slot 148 for gas flowing from top to bottom, the bottom end of the valve plate 146 is provided with a second spiral spring 149 in compression state.

[0027] In order to discharge the accumulated dust in time, thereby preventing the phenomenon of low filtration efficiency caused by dust flying again, please refer to Figure 1 、 Figure 2 And Figure 9, need to set up the spiral dust discharge structure 15, fixedly installed at the bottom end of the dust discharge channel 6, the inside is provided with the spiral impeller 156 which can drive the dust falling around to discharge outward when rotating and the driving motor 154 for driving the spiral impeller 156 to rotate, after starting the driving motor 154, the conveying direction of the spiral impeller 156 can be controlled by controlling the rotating direction of the rotor 155, when the dust moves to the surrounding of the spiral impeller 156, the rotating spiral impeller 156 can timely guide the dust outward, thereby timely discharging the accumulated dust, so as to prevent the phenomenon of low filtering efficiency caused by dust splashing again.

[0028] For the specific structure of the spiral dust discharge structure 15, please refer to Figure 9 , including a transverse hollow pipe 151, the inside of the transverse hollow pipe 151 is provided with a dust conveying hole 152 with one end open, the circumferential side of the transverse hollow pipe 151 is provided with a top dust inflow channel 153 of an integral structure and for connecting the bottom port of the dust discharge channel 6 and the dust conveying hole 152, the solid end face of the transverse hollow pipe 151 is fixedly installed with the driving motor 154, the rotor 155 of the driving motor 154 penetrates through the transverse hollow pipe 151 and extends to the inside of the dust conveying hole 152, the rotor 155 is provided with the spiral impeller 156 on the shaft body inside the dust conveying hole 152, in order to effectively utilize the kinetic energy of the driving motor 154, a gap is needed to exist between the side face of the spiral impeller 156 and the inner wall of the dust conveying hole 152, and the gap is insufficient for the dust to flow along the transverse direction.

[0029] The working principle of the application is: the exhaust pipe formed by the air blower is connected with the mixed gas inlet channel 7, the gas is introduced into the dust discharge channel 6 under the action of the air blower, under the action of the gas distribution plate 11, some dust with large particles will enter the dust discharge channel 6 under the action of inertia, and the dust with small particles and air will flow to the area above the dust removal cavity 3; Then the fine dust will be filtered by the filter cloth 127, at this time, the fine dust will adhere to the outer surface of the filter cloth 127, and the air will be discharged outward through the gas flow hole 9 and the gas discharge channel 8; When it is needed to remove the dust adhering to the surface of the filter cloth 127, the pulse controller is opened, the high-pressure air can be instantaneously released through the gas jet 10 and enters the inside of the filter cloth 127, at this time, the filter cloth 127 through which the high-pressure gas passes will instantaneously expand outward, at this time, the filter cloth 127 will generate an upward driving torque on the bottom plate body 122, at this time, the first spiral spring 1210 is compressed under stress, and in the process of compression, the filter cloth 127 can buffer the impact force of the pulse air pressure and adaptively move upward, at the same time, the dust adhering to the outside of the filter cloth 127 can fall into the inside of the dust discharge channel 6. The driving motor 154 is started, the rotation direction of the rotor 155 is controlled, the conveying direction of the spiral impeller 156 is controlled, and when the dust moves to the surrounding of the spiral impeller 156, the rotating spiral impeller 156 can timely guide the dust outward.

[0030] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pulse-jet filter cartridge gas-solid separator for MDF cutting waste, characterized in that: include, The filter cloth buffer structure (12) is provided with a filter cloth (127) for filtering gas, a longitudinal movable shaft (128) that moves longitudinally with the bottom end of the filter cloth (127), and a first helical spring (1210) that generates downward elastic pressure on the bottom of the filter cloth (127) through the longitudinal movable shaft (128). The airbag-type clamping structure (13) has an annular airbag (134) inside which is placed around the bottom shaft of the longitudinal movable shaft (128) and provides frictional damping by wrapping and clamping the shaft of the longitudinal movable shaft (128) after being subjected to gas pressure. And a maximum air pressure control structure (14), which is provided with a valve plate (146) that can control the outward flow of gas around the annular airbag (134) and a second helical spring (149) that generates upward elastic pressure on the valve plate (146). The upper end face of the valve plate (146) is embedded with a sealing gasket (147) that protrudes upward and can abut against the bottom of the air inlet (144). The circumferential side of the valve plate (146) is provided with a ventilation groove (148) for gas to flow from top to bottom.

2. The pulse backflush type filter cartridge gas-solid separator for MDF cutting waste according to claim 1, characterized in that: It also includes a vertical dust collector (1) with a support leg (2) installed at the bottom, a dust collection cavity (3) set inside the vertical dust collector (1), a gas flow cavity (5) set above the dust collection cavity (3) by a partition (4), a dust discharge channel (6) set at the bottom of the dust collection cavity (3), a mixed gas inlet channel (7) set on the side of the vertical dust collector (1) for discharging gas into the side of the bottom area of ​​the dust collection cavity (3), a gas discharge channel (8) set on the side of the vertical dust collector (1) for discharging gas from the gas flow cavity (5), a gas flow hole (9) set inside the partition (4) and a gas nozzle (10) for discharging high-pressure gas into the gas flow hole (9), and a gas distribution plate (11) installed inside the vertical dust collector (1) for generating a downward blocking effect on the gas from the direction of the mixed gas inlet channel (7).

3. A pulse-jet filter cartridge gas-solid separator for MDF cutting waste according to claim 2, characterized in that: The filter cloth buffer structure (12) includes a top plate (121) and a bottom plate (122). A filter cloth (127) is embedded between the top plate (121) and the bottom plate (122). The upper end face of the top plate (121) is provided with a concave internal thread groove (123). The top plate (121) is provided with an internal thread structure (124) on the circumferential side of the internal thread groove (123). The interior of the top plate (121) is provided with a gas flow port (125) connecting the internal thread groove (123) and the middle area of ​​the filter cloth (127). The bottom plate ( A polygonal rod hole (126) is provided in the middle of the 122. A longitudinal movable shaft (128) that can move longitudinally is inserted into the polygonal rod hole (126). A top limiting plate (129) is installed at the top of the longitudinal movable shaft (128). A first helical spring (1210) is placed between the top limiting plate (129) and the bottom plate (122). The top plate (121) is installed on the bottom surface of the partition plate (4) through an internal thread structure (124) and an external thread structure that is located around the protrusion structure at the bottom end of the gas flow hole (9).

4. A pulse-jet filter cartridge gas-solid separator for MDF cutting waste according to claim 3, characterized in that: The cross-sectional shape of the polygonal rod hole (126) is consistent with the cross-sectional shape of the longitudinal movable shaft (128), both being polygonal structures, and the structural dimensions of the cross-sectional shape of the polygonal rod hole (126) match the structural dimensions of the cross-sectional shape of the longitudinal movable shaft (128).

5. A pulse-jet filter cartridge gas-solid separator for MDF cutting waste according to claim 3, characterized in that: The airbag-type clamping structure (13) includes a hollow disc-shaped outer shell (131). A transverse connecting rod (138) is installed on the circumferential side of the hollow disc-shaped outer shell (131). The end of the transverse connecting rod (138) is fixedly installed on the side wall of the vertical dust collector (1) through a first fixing plate (139). The center of the hollow disc-shaped outer shell (131) is provided with a shaft hole (132) that fits around the bottom area of ​​the longitudinal movable shaft (128). The hollow disc-shaped outer shell (131) is provided with an annular ring around the middle area of ​​the shaft hole (132). The hollow disc-shaped outer shell (131) has an annular air bladder (134) embedded at the intersection of the annular gas storage cavity (133) and the shaft hole (132). The side of the hollow disc-shaped outer shell (131) is provided with a gas injection hole (135) that communicates with the annular gas storage cavity (133), and a gas valve (136) is installed inside the gas injection hole (135). The interior of the hollow disc-shaped outer shell (131) is provided with a gas compensation hole (137) that communicates with its bottom end face and the gas injection hole (135).

6. A pulse-jet filter cartridge gas-solid separator for MDF cutting waste according to claim 5, characterized in that: The annular airbag (134) is a ring structure made of an elastic and wear-resistant material.

7. A pulse-jet filter cartridge gas-solid separator for MDF cutting waste according to claim 5, characterized in that: The maximum air pressure control structure (14) includes a longitudinal hollow shell (141), a second fixing plate (142) fixedly installed on the bottom surface of the hollow disc shell (131) at the top of the longitudinal hollow shell (141), a longitudinal movable cavity (143) is provided inside the longitudinal hollow shell (141), an air inlet (144) connected to the gas compensation hole (137) is provided at the top of the longitudinal hollow shell (141), an exhaust port (145) for discharging gas is provided at the bottom of the longitudinal hollow shell (141), and a valve plate (146) that can move axially along the longitudinal movable cavity (143) is placed inside the longitudinal hollow shell (141) in the longitudinal movable cavity (143), and a second helical spring (149) in a compressed state is installed at the bottom of the valve plate (146).

8. A pulse-jet filter cartridge gas-solid separator for MDF cutting waste according to any one of claims 1-7, characterized in that: It also includes a spiral dust discharge structure (15), which is fixedly installed at the bottom of the dust discharge channel (6). Inside it is a spiral impeller (156) that can drive the dust falling around it to be discharged outward when it rotates, and a drive motor (154) for driving the spiral impeller (156) to rotate.

9. A pulse-jet filter cartridge gas-solid separator for MDF cutting waste according to claim 8, characterized in that: The spiral dust discharge structure (15) includes a transverse hollow pipe (151), and a dust conveying hole (152) with one end open is provided inside the transverse hollow pipe (151). An integral structure is provided on the circumferential side of the transverse hollow pipe (151) for connecting the bottom port of the dust discharge channel (6) and the top dust inflow channel (153) of the dust conveying hole (152). A drive motor (154) is fixedly installed on the solid end face of the transverse hollow pipe (151). The rotor (155) of the drive motor (154) passes through the transverse hollow pipe (151) and extends into the dust conveying hole (152). A spiral impeller (156) is provided on the shaft of the rotor (155) located inside the dust conveying hole (152).

10. A pulse-jet filter cartridge gas-solid separator for MDF cutting waste according to claim 9, characterized in that: There is a gap between the side of the spiral impeller (156) and the inner wall of the dust conveying hole (152), and the gap is insufficient to allow dust to flow laterally.

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