Pulse dust collector

Abstract

The invention relates to the technical field of dust removers, and discloses a pulse dust remover which comprises a filter cloth type buffer structure, an air bag type clamping structure and a maximum atmospheric pressure control structure, and a valve plate capable of controlling gas around an annular air bag to flow outwards and a second spiral spring generating upward elastic pressure on the valve plate are arranged in the pulse dust remover. According to the pulse dust collector, 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 intensity of instantaneous acting force of the gas on the filter cloth is relieved on the premise of reducing the influence on the expansion of the filter cloth, and the service life of the filter cloth is prolonged. Therefore, the effective working time of the filter cloth is prolonged.

Description

Technical Field

[0001] This invention relates to the field of dust collector technology, specifically a pulse dust collector. Background Technology

[0002] Baghouse pulse jet dust collectors use filter bags as the filter medium, where dust is collected on the filter cloth under the action of airflow. Through the operation of the pulse jet system, counter-current airflow creates localized high-pressure air that impacts the filter cloth, removing the dust and achieving the dust removal effect. Finally, the purified gas is discharged from the dust collector.

[0003] Chinese patent publication number CN107754473A discloses a pulse bag filter dust collector, including a housing. Inside the housing are a clean air chamber and a filter chamber, which are isolated from each other. An inlet pipe and an outlet pipe are respectively provided on the two side walls of the housing. The clean air chamber is connected to the outlet pipe, and the filter chamber is connected to the inlet pipe. An air jet pipe is installed inside the clean air chamber, with one end extending through the clean air chamber to the outside of the housing, and a pulse valve is installed at that end. Multiple filter cloths are arranged inside the filter chamber. One end of the nozzle is connected to the clean air chamber, and the nozzle has multiple nozzles corresponding to the filter cloth. It also includes a pre-dust plate hinged to the top of the filter chamber at one end, a guide plate inclined along the air intake direction installed at the other end of the pre-dust plate, and a counterweight fixed on the side of the pre-dust plate facing away from the air intake pipe. The filter cloth includes an outer bag body, an inner bag body disposed inside the outer bag body, and a frustum-shaped skeleton disposed on the inner wall of the inner bag body. A secondary airflow channel is formed annularly between the outer bag body and the inner bag body. A nozzle corresponding to the filter cloth is opened at the upper end of the outer bag body. The secondary airflow channel connects to an air outlet. An open-end cylindrical body is installed between the bottom of the inner and outer bag bodies, with the open end communicating with the interior of the inner bag. Air holes communicating with the secondary airflow channel are formed on both side walls of the cylindrical body. A slider is slidably mounted inside the cylindrical body, and a spring is installed at the bottom of the slider. When the inner bag is in its normal state, the spring supports the slider, separating the interior of the inner bag from the secondary airflow channel. An annular limiting groove is formed on the inner wall of the cylindrical body, and the air hole is located in the center of the limiting groove. The slider is slidably disposed in the limiting groove, and semi-circular elastic protrusions are respectively installed at the two ends of the upper and lower surfaces of the slider, and the diameter of the elastic protrusions is the same as the depth of the limiting groove; the skeleton includes a frame composed of a metal ring and a metal rod and two U-shaped hooks fixed at the top of the frame. An L-shaped reinforcing rib matching the hook is provided on the inner wall of the hook, and an outwardly protruding fastening part is provided on the outer wall of the lower end of the reinforcing rib, and a fastening groove that mates with the fastening part is provided on the inner wall of the hook.

[0004] In order not to affect the operation of other equipment, the aforementioned pulse bag dust collector is often cleaned by the operator without stopping the machine. Several sets of filter cloths are cleaned first, and the remaining filter cloths can filter normally. The cleaning is carried out alternately. However, in this alternating cleaning process, some of the dust that falls off the filter cloth is easy to be carried by the airflow and re-attached to the surface of the adjacent filter cloth that has just been cleaned. As a result, the cleaning effect is not very ideal, and frequent cleaning is required.

[0005] To address this, Chinese Patent Publication No. CN111282360B discloses "A Pulse Dust Collector," whose main structure includes a housing with an inlet pipe and an outlet pipe on each of its two side walls. The clean air chamber is connected to the outlet pipe, the filter chamber is connected to the inlet pipe, and the bag opening of the filter cloth is connected to the purification chamber. The telescopic sleeve includes a first sleeve and a second sleeve that is sealed and fitted to the first sleeve. The upper end of the first sleeve is sealed and fixedly connected to the inner wall of the housing. A driving component is provided on one side wall of the first sleeve to drive the second sleeve to move up and down. Several extension sleeves communicating with the interior of the housing are provided at the bottom of the housing. Each extension sleeve corresponds to a telescopic sleeve. A sealing valve is provided at the lower end of each extension sleeve for sealing the extension sleeve. When the second sleeve is inserted into the extension sleeve, the outer wall of the second sleeve and the inner wall of the extension sleeve are sealed together. This pulse dust collector can perform dust removal without stopping the machine, and the dust removal effect is superior, extending the time interval for filter cloth dust removal.

[0006] A careful examination of the pulse dust collector reveals that when the filter cloth used for dust removal is affected by the pulse-controlled compressed gas, the filter cloth will suddenly expand, causing the force on the filter cloth to suddenly increase. Since the filter cloth in the force area is mostly made of textile fabric, the force cannot be relieved, resulting in the filter cloth expanding suddenly and the mesh gap becoming larger. Therefore, its effective working time is relatively short. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a pulse dust collector. When the filter cloth is suddenly subjected to high-pressure gas, the filter cloth expands outwards, while the bottom of the filter cloth can adaptively move upwards under the buffering effect of the spiral spring. This reduces the impact of the filter cloth expansion on the instantaneous force of the gas on the filter cloth, thereby increasing the effective working time of the filter cloth and solving the aforementioned technical problems.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a pulse dust collector, comprising a vertical dust collector cabinet with supporting legs installed at the bottom, a dust collection cavity disposed inside the vertical dust collector cabinet, a gas flow cavity disposed above the dust collection cavity via a partition, a dust discharge channel disposed at the bottom of the dust collection cavity, a mixed gas inlet channel disposed on the side of the vertical dust collector cabinet for discharging gas into the side of the bottom area of ​​the dust collection cavity, a gas discharge channel disposed on the side of the vertical dust collector cabinet for discharging gas from the gas flow cavity, a gas flow hole disposed inside the partition, a gas nozzle connected to an external air compression tank and controlled by a pulse solenoid valve for discharging high-pressure gas into the gas flow hole, and a gas nozzle installed inside the vertical dust collector cabinet for... The system includes a gas distribution plate that creates a downward blocking effect on the gas entering the channel from the mixed gas direction; a filter cloth buffer structure, which internally contains a filter cloth installed at the bottom of the gas flow hole for filtering the gas, a longitudinal movable shaft that moves longitudinally along the bottom of the filter cloth, and a first helical spring that generates downward elastic pressure on the bottom of the filter cloth through the longitudinal movable shaft; an airbag clamping structure, which internally contains an annular airbag that is sleeved around the bottom shaft of the longitudinal movable shaft and clamps the shaft of the longitudinal movable shaft after being subjected to gas pressure, thereby adjusting the elastic strength of the first helical spring; and a maximum gas pressure control structure, which internally contains a valve plate that controls the outward flow of gas around the annular airbag and a second helical spring that generates upward elastic pressure on the valve plate.

[0009] Preferably, the filter cloth buffer structure includes a top plate and a bottom plate, with a filter cloth embedded between the top plate and the bottom plate. The upper end face of the top plate is provided with a concave internal thread groove, and the circumferential side of the top plate located in the internal thread groove is provided with an internal thread structure. The interior of the top plate is provided with a gas flow port connecting the internal thread groove and the middle region of the filter cloth. The middle of the bottom plate is provided with a polygonal rod hole, and a longitudinally movable shaft is inserted into the polygonal rod hole. A top limiting plate is installed at the top of the longitudinally movable shaft, and a first helical spring is sleeved between the top limiting plate and the bottom plate on the longitudinally movable shaft.

[0010] Preferably, the top plate is mounted on the bottom surface of the partition plate via an internal thread structure and an external thread structure located around the protrusion structure at the bottom of the gas flow hole.

[0011] Preferably, the structural shape of the polygonal rod hole cross section is consistent with the structural shape of the longitudinal movable shaft cross section, both being polygonal structures, and the structural dimensions of the polygonal rod hole cross section match the structural dimensions of the longitudinal movable shaft cross section.

[0012] Preferably, the airbag clamping structure includes a hollow disc-shaped outer shell. A transverse connecting rod is installed on the circumferential side of the hollow disc-shaped outer shell. The end of the transverse connecting rod is fixedly installed to the side wall of the vertical dust collector via a first fixing plate. A shaft hole is provided at the center of the hollow disc-shaped outer shell, which fits around the shaft body in the bottom region of the longitudinal movable shaft. An annular gas storage cavity is provided on the periphery of the central region of the shaft hole. An annular airbag is embedded in the hollow disc-shaped outer shell at the intersection of the annular gas storage cavity and the shaft hole. A gas injection hole communicating with the annular gas storage cavity is provided on the side of the hollow disc-shaped outer shell, and a gas valve is installed inside the gas injection hole. A gas compensation hole communicating with its bottom end face and the gas injection hole is provided inside the hollow disc-shaped outer shell.

[0013] Preferably, the annular airbag is an annular structure made of an elastic and wear-resistant material.

[0014] Preferably, the maximum air pressure control structure includes a longitudinal hollow shell. A second fixing plate is fixedly installed on the bottom surface of the hollow disc-shaped shell at the top of the longitudinal hollow shell. A longitudinal movable cavity is provided inside the longitudinal hollow shell. An air inlet communicating with a gas compensation hole is provided at the top of the longitudinal hollow shell. An exhaust port for discharging gas is provided at the bottom of the longitudinal hollow shell. A valve plate that can move axially along the longitudinal movable cavity is placed inside the longitudinal hollow shell. A sealing gasket that protrudes upward and abuts against the bottom of the air inlet is embedded on the upper end surface of the valve plate. A venting groove for gas to flow from top to bottom is provided on the circumferential side of the valve plate. A second helical spring in a compressed state is installed at the bottom of the valve plate.

[0015] Preferably, it also includes a spiral dust discharge structure, which is fixedly installed at the bottom of the dust discharge channel. Inside the structure is a spiral impeller that drives the dust falling around it to be discharged outward when it rotates, and a drive motor for driving the spiral impeller to rotate.

[0016] Preferably, the spiral dust discharge structure includes a transverse hollow pipe, the interior of which is provided with a dust conveying hole open at one end. The circumferential side of the transverse hollow pipe is provided with an integral structure for connecting the bottom port of the dust discharge channel and the top dust inflow channel of the dust conveying hole. A drive motor is fixedly installed on the solid end face of the transverse hollow pipe. The rotor of the drive motor passes through the transverse hollow pipe and extends into the interior of the dust conveying hole. A spiral impeller is provided on the shaft of the rotor located inside the dust conveying hole.

[0017] 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 insufficient to allow the dust to flow laterally.

[0018] Compared with the prior art, the present invention provides a pulse dust collector with the following beneficial effects:

[0019] The pulse dust collector:

[0020] 1. When the filter cloth is suddenly subjected to high-pressure gas, the filter cloth will expand outwards. The bottom of the filter cloth can move upwards adaptively under the buffering effect of the spiral spring. This reduces the impact on the expansion of the filter cloth and alleviates the instantaneous force of the gas on the filter cloth, thereby improving the effective working time of the filter cloth.

[0021] 2. By setting up a filter cloth buffer structure, the high-pressure gas in the air tank will be instantly injected into the filter cloth through the gas nozzle. The filter cloth passing through the high-pressure gas will instantly expand outward. At this time, the filter cloth will generate an upward driving force on the bottom plate. At this time, the first helical spring is compressed. During the compression process, the filter cloth can buffer the impact force of the pulse air pressure and undergo an adaptive upward movement. In this way, the instantaneous force intensity of the gas on the filter cloth is reduced while reducing the impact on the expansion of the filter cloth, so as to improve the effective working time of the filter cloth.

[0022] 3. By setting a maximum air pressure control structure, when the air pressure inside the annular gas storage chamber is greater than the elastic strength of the second helical spring, the gas pressure will cause the valve plate to move downward. Therefore, the clamping force of the annular airbag on the longitudinal moving shaft is effectively controlled. Once the impact force caused by the pulse air pressure is greater than the clamping force, the longitudinal moving shaft will disengage from the annular airbag and move, thereby controlling the maximum clamping force of the annular airbag and improving the stability of the equipment during pulse dust removal. Attached Figure Description

[0023] Figure 1 This is a perspective view of the present invention;

[0024] Figure 2 This is a schematic diagram of the full cross-section structure of the present invention;

[0025] Figure 3 This is a perspective view of the filter cloth buffer structure in this invention;

[0026] Figure 4 This is a three-dimensional cross-sectional view of the filter cloth buffer structure in this invention;

[0027] Figure 5 This is a perspective view of the airbag clamping structure in this invention;

[0028] Figure 6 This is a three-dimensional cross-sectional view of the airbag-type clamping structure in this invention;

[0029] Figure 7This is a perspective view of the atmospheric pressure control structure in this invention;

[0030] Figure 8 This is a three-dimensional cross-sectional view of the atmospheric pressure control structure in this invention;

[0031] Figure 9 This is a full cross-sectional schematic diagram of the spiral dust emission structure in this invention.

[0032] The components include: 1. Vertical dust collector; 2. Support legs; 3. Dust collection 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 buffer structure; 121. Top plate; 122. Bottom plate; 123. Internal threaded groove; 124. Internal threaded structure; 125. Gas flow port; 126. Polygonal rod hole; 127. Filter cloth; 128. Longitudinal movable shaft; 129. Top limiting plate; 1210. First helical spring; 13. Airbag clamping structure; 131. Hollow disc-shaped outer shell; 132. Shaft hole; 133. 134. Annular gas storage chamber; 135. Annular airbag; 136. Gas injection hole; 137. Gas valve; 138. Gas compensation hole; 139. Transverse connecting rod; 140. First fixed plate; 15. Maximum air pressure control structure; 16. Longitudinal hollow shell; 17. Second fixed plate; 18. Longitudinal movable cavity; 19. Air inlet; 10. Exhaust port; 110. Valve plate; 111. Sealing gasket; 12. Ventilation groove; 132. Second helical spring; 133. Spiral dust discharge structure; 144. Transverse hollow pipe; 155. Dust conveying hole; 16. Top dust inflow channel; 17. Drive motor; 18. Rotor; 19. Spiral impeller. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figure 1 and Figure 2A pulse dust collector includes a vertical dust collector cabinet 1 with support legs 2 mounted on the bottom, a dust collection cavity 3 disposed inside the vertical dust collector cabinet 1, a gas flow cavity 5 disposed above the dust collection cavity 3 via a partition 4, a dust discharge channel 6 disposed at the bottom of the dust collection cavity 3, a mixed gas inlet channel 7 disposed on the side of the vertical dust collector cabinet 1 for discharging gas into the side of the bottom area of ​​the dust collection cavity 3, a gas discharge channel 8 disposed on the side of the vertical dust collector cabinet 1 for discharging gas from the gas flow cavity 5, a gas flow hole 9 disposed inside the partition 4, and a gas nozzle 1 connected to an external air compression tank and whose internal gas flow is controlled by a pulse solenoid valve and discharges high-pressure gas into the gas flow hole 9. 0 and a gas distribution plate 11 installed inside the vertical dust collector 1, which can block the gas from the direction of the mixed gas inlet channel 7 downward. Under the action of the blower, the gas will enter through the dust discharge channel 6. Under the action of the gas distribution plate 11, some larger dust particles will enter the dust discharge channel 6 under the action of inertia, while smaller dust particles and air will be filtered and finally discharged outward through the gas flow hole 9 and the gas discharge channel 8. At the same time, a certain amount of high-pressure gas needs to be compressed in the external air tank, and the control of the pulse solenoid valve needs to rely on the pulse controller. Only when the pulse controller is turned on can the high-pressure air be released instantly through the gas nozzle 10.

[0035] To reduce the impact effect of pulsed air pressure on filter cloth 127, please refer to... Figure 1 , Figure 2 , Figure 3 and Figure 4 A filter cloth buffer structure 12 needs to be set up, which contains a filter cloth 127 installed at the bottom of the gas flow hole 9 for filtering gas, a longitudinal movable shaft 128 that moves longitudinally along the bottom 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. When the pulse controller inputs a signal to the pulse solenoid valve, the pulse solenoid valve will open, and the high-pressure gas in the air tank will be instantly sprayed into the filter cloth 127 through the gas nozzle 10. The filter cloth 127 will instantly expand outward as the high-pressure gas passes through it. At this time, the filter cloth 127 will generate an upward driving force on the bottom plate 122. At this time, the first helical spring 1210 will be compressed. During the compression process, the filter cloth 127 can buffer the impact force of the pulse gas pressure and move upward adaptively. In this way, while reducing the impact of the expansion of the filter cloth 127, the instantaneous force intensity of the gas on the filter cloth 127 is alleviated, thereby improving the effective working time of the filter cloth 127.

[0036] For details regarding the specific structure of the filter cloth buffer structure 12, please refer to [link / reference]. Figure 3 and Figure 4The system includes a top plate 121 and a bottom plate 122, with a filter cloth 127 embedded between them. The upper surface of the top plate 121 has a concave internal thread groove 123, and the top plate 121 has an internal thread structure 124 on its circumferential side located in the internal thread groove 123. For detachable connection, the top plate 121 is mounted to the bottom surface of the partition plate 4 via the internal thread structure 124 and an external thread structure surrounding a protrusion at the bottom of the gas flow hole 9. The top plate 121 has a gas flow port 125 connecting the internal thread groove 123 and the middle region of the filter cloth 127. The bottom plate 121... A polygonal rod hole 126 is provided in the middle of the plate 122. A longitudinally movable shaft 128 is inserted into the polygonal rod hole 126. In order to prevent the component from rotating, the cross-sectional shape of the polygonal rod hole 126 and the cross-sectional shape of the longitudinally movable shaft 128 must be the same, both being polygonal structures. The cross-sectional dimensions of the polygonal rod hole 126 and the cross-sectional dimensions of the longitudinally movable shaft 128 must match. A top limiting plate 129 is installed at the top of the longitudinally movable shaft 128. A first helical spring 1210 is placed between the top limiting plate 129 and the bottom plate 122.

[0037] To achieve the adjustable elastic strength capability of the first helical spring 1210, please refer to... Figure 1 , Figure 2 , Figure 5 and Figure 6 An airbag-type clamping structure 13 needs to be set up, which has an annular airbag 134 inside. It is placed around the bottom shaft of the longitudinal movable shaft 128 and clamps the shaft of the longitudinal movable shaft 128 after being subjected to gas pressure, thereby adjusting the elastic strength of the first helical spring 1210. By manually adjusting the longitudinal movable shaft 128 and controlling the distance between the top limiting plate 129 and the bottom plate 122, the elastic strength of the first helical spring 1210 at this distance can be controlled, thereby adjusting the buffering force of the filter cloth 127 when subjected to pulse air pressure. Specifically, gas is filled into the gas injection hole 135 using an inflation device. The gas will cause the outer periphery of the annular airbag 134 to be affected by pressure, so that the annular airbag 134 is clamped around the circumferential side of the longitudinal movable shaft 128, thereby limiting the height of the longitudinal movable shaft 128.

[0038] For details regarding the specific structure of the airbag-type clamping structure 13, please refer to [link / reference]. Figure 5 and Figure 6The system includes a hollow disc-shaped outer shell 131. A transverse connecting rod 138 is mounted on the circumferential side of the hollow disc-shaped outer shell 131. The end of the transverse connecting rod 138 is fixedly mounted to the side wall of the vertical dust collector 1 via a first fixing plate 139. A shaft hole 132 is provided at the center of the hollow disc-shaped outer shell 131, which fits around the bottom region of the longitudinal movable shaft 128. An annular gas storage cavity 133 is provided around the central region of the shaft hole 132 in the hollow disc-shaped outer shell 131. An annular airbag 134 is embedded at the intersection of the gas storage cavity 133 and the shaft hole 132. In order to achieve effective enveloping clamping, the annular airbag 134 needs to be 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 that connects to 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 shell 131 is provided with a gas compensation hole 137 that connects its bottom end face and the gas injection hole 135.

[0039] To control the maximum clamping force of the annular airbag 134 and thus improve the stability of the equipment during pulse dust removal operation, please refer to [link to relevant documentation]. Figure 1 , Figure 7 and Figure 8 A maximum air pressure control structure 14 needs to be set up, which contains a valve plate 146 that controls 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. When the air pressure inside the annular gas storage chamber 133 is greater than the elastic strength of the second helical spring 149, the gas pressure will cause the valve plate 146 to move downward, and the corresponding gas will flow outward through the air inlet 144, the ventilation groove 148 and the exhaust port 145. Therefore, the clamping force of the annular airbag 134 on the longitudinal movable shaft 128 is effectively controlled. Once the impact force caused by the pulse air pressure is greater than the clamping force, the longitudinal movable shaft 128 will disengage from the annular airbag 134 and move, thereby controlling the maximum clamping force of the annular airbag 134 and improving the stability of the equipment during pulse dust removal.

[0040] For details regarding the maximum air pressure control structure 14, please refer to [link / reference]. Figure 7 and Figure 8The device includes a longitudinal hollow outer shell 141. A second fixing plate 142 is fixedly installed on the bottom surface of a hollow disc-shaped outer shell 131 at the top of the longitudinal hollow outer shell 141. A longitudinal movable cavity 143 is provided inside the longitudinal hollow outer shell 141. An air inlet 144 communicating with a gas compensation hole 137 is provided at the top of the longitudinal hollow outer shell 141. An exhaust port 145 for discharging gas is provided at the bottom of the longitudinal hollow outer shell 141. A valve plate 146 that can move axially along the longitudinal movable cavity 143 is placed inside the longitudinal hollow outer shell 141. A sealing gasket 147 that protrudes upward and can abut against the bottom of the air inlet 144 is embedded in the upper end surface of the valve plate 146. A venting groove 148 for gas to flow from top to bottom is provided on the circumferential side of the valve plate 146. A second helical spring 149 in a compressed state is installed at the bottom of the valve plate 146.

[0041] To promptly remove accumulated dust and prevent it from splashing back and causing reduced filtration efficiency, please refer to [link / reference needed]. Figure 1 , Figure 2 and Figure 9 A spiral dust discharge structure 15 needs to be installed, which is fixedly installed at the bottom of the dust discharge channel 6. Inside the structure, there is a spiral impeller 156 that drives 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. After the drive motor 154 is started, the conveying direction of the spiral impeller 156 can be controlled by controlling the rotation direction of the rotor 155. When the dust moves around the spiral impeller 156, the rotating spiral impeller 156 can promptly discharge the dust outward, thereby timely discharging the accumulated dust and preventing the dust from splashing again, which would lead to low filtration efficiency.

[0042] For details regarding the spiral dust emission structure 15, please refer to [link / reference]. Figure 9 The device includes a transverse hollow pipe 151, inside which a dust conveying hole 152 with one end open is provided. The circumferential side of the transverse hollow pipe 151 is provided with an integral structure 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. In order to effectively utilize the kinetic energy of the drive motor 154, there needs to be a gap between the side of the spiral impeller 156 and the inner wall of the dust conveying hole 152, and this gap is insufficient to allow dust to flow laterally.

[0043] The working principle of this invention is as follows: the exhaust pipe formed by the blower is connected to the mixed gas inlet channel 7. Under the action of the blower, the gas will enter through the dust discharge channel 6. Under the action of the gas distribution plate 11, some larger dust particles will enter the dust discharge channel 6 under the action of inertia, while smaller dust particles and air will flow to the area above the dust removal cavity 3.

[0044] Then it is filtered by the filter cloth 127. At this time, fine dust will adhere to the outer surface of the filter cloth 127, while the air is discharged to the outside through the gas flow hole 9 and the gas discharge channel 8.

[0045] When it is necessary to remove dust adhering to the surface of the filter cloth 127, the pulse controller is turned on, and high-pressure air can be released instantly through the gas nozzle 10 and enter the interior of the filter cloth 127. At this time, the filter cloth 127 passing through the high-pressure gas will instantly expand outward. At this time, the filter cloth 127 will generate an upward driving force on the bottom plate 122. At this time, the first helical spring 1210 is compressed. During the compression process, the filter cloth 127 can buffer the impact force of the pulse air pressure and move upward adaptively. At the same time, the dust adhering to the outside of the filter cloth 127 can fall into the dust discharge channel 6.

[0046] Start the drive motor 154, and control the rotation direction of the rotor 155 to control the conveying direction of the spiral impeller 156. When dust moves around the spiral impeller 156, the rotating spiral impeller 156 can promptly discharge the dust outward.

[0047] Although embodiments of the invention 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 to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pulse dust collector, comprising a vertical dust collector cabinet (1) with support legs (2) installed at the bottom, a dust collection cavity (3) disposed inside the vertical dust collector cabinet (1), a gas flow cavity (5) disposed above the dust collection cavity (3) via a partition (4), a dust discharge channel (6) disposed at the bottom of the dust collection cavity (3), a mixed gas inlet channel (7) disposed on the side of the vertical dust collector cabinet (1) for discharging gas into the side of the bottom area of ​​the dust collection cavity (3), a gas discharge channel (8) disposed on the side of the vertical dust collector cabinet (1) for discharging gas from the gas flow cavity (5), a gas flow hole (9) disposed inside the partition (4), a gas nozzle (10) connected to an external air compression tank and controlled by a pulse solenoid valve for discharging high-pressure gas into the gas flow hole (9), and a gas distribution plate (11) installed inside the vertical dust collector cabinet (1) for generating a downward blocking effect on gas from the direction of the mixed gas inlet channel (7), characterized in that: It also includes, The filter cloth buffer structure (12) is provided with a filter cloth (127) installed at the bottom of the gas flow hole (9) 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 clamping structure (13) has an annular airbag (134) inside, which is placed around the bottom shaft of the longitudinal movable shaft (128) and clamps the shaft of the longitudinal movable shaft (128) after being subjected to gas pressure, thereby adjusting the elastic strength of the first helical spring (1210). And a maximum air pressure control structure (14), which is provided with a valve plate (146) that controls 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).

2. The pulse dust collector according to claim 1, characterized in that: The filter cloth buffer structure (12) includes a top plate (121) and a bottom plate (122), with a filter cloth (127) 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), and 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 connecting internal thread groove (123). The gas flow port (125) in the middle region of the filter cloth (127) is provided with a polygonal rod hole (126) in the middle of the bottom plate (122). A longitudinally movable shaft (128) is inserted into the polygonal rod hole (126). A top limiting plate (129) is installed at the top of the longitudinally movable shaft (128). A first helical spring (1210) is placed between the top limiting plate (129) and the bottom plate (122) of the longitudinally movable shaft (128).

3. A pulse dust collector according to claim 2, characterized in that: 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 located around the protrusion structure at the bottom end of the gas flow hole (9).

4. A pulse dust collector 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 dust collector according to claim 4, characterized in that: The airbag 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). A gas storage chamber (133) is provided. The hollow disc-shaped outer shell (131) has an annular air bladder (134) embedded at the intersection of the annular gas storage chamber (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 chamber (133). 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 dust collector according to claim 5, characterized in that: The annular airbag (134) is an annular structure made of elastic and wear-resistant material.

7. A pulse dust collector 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 a hollow disc-shaped shell (131) is provided on 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) communicating with a gas compensation hole (137) is provided on the top of the longitudinal hollow shell (141), and an exhaust port for discharging gas is provided at the bottom of the longitudinal hollow shell (141). 145), the longitudinal hollow shell (141) has a valve plate (146) that can move axially along the longitudinal movable cavity (143) inside the longitudinal movable cavity (143). 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 venting groove (148) for gas to flow from top to bottom. The bottom end of the valve plate (146) is equipped with a second helical spring (149) in a compressed state.

8. A pulse dust collector according to claim 1, 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 dust collector 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 dust collector 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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