Pulse cloth bag dust collector

Abstract

This invention relates to the field of dust removal devices, and in particular to a pulse jet bag filter, the structure of which includes: a frame, an ash discharge device installed inside the frame, a filter box connected to the top via the ash discharge device, an air outlet pipe installed on the side of the filter box, and a nested connection between the top and a top plate. The filter box includes a housing, an air jet pipe installed on the top of the housing, the air jet pipe being connected to an air storage device installed on the frame platform, and a filter bag assembly installed at the bottom of the air jet pipe. The filter bag assembly is mounted in a groove in the housing. The relative displacement between the first and second frames is controlled by a push rod, allowing the filter bags to achieve an alternating tight and loose working state: when the filter bags are in a tight state, the surface wrinkles are reduced, dust lacks adhesion points, and natural desorption during filtration is facilitated; when the first frame retracts, causing the filter bags to be in a loose state, in conjunction with the backlash of the pulse airflow, the filter bags can generate a larger amplitude, thereby quickly and thoroughly shaking off the dust.

Description

Technical Field

[0001] This invention is a pulse bag filter dust collector, belonging to the field of dust removal devices. Background Technology

[0002] The bag pulse dust collector is an advanced and efficient bag dust collection device. It is a dust collection device with large air volume handling capacity, good dust removal effect, high dust removal efficiency, reliable operation, convenient maintenance, and small footprint.

[0003] The main principle of a bag filter pulse dust collector is air-stop pulse jet cleaning. It uses compressed air to instantly increase the pressure inside the filter bag, shaking the dust off the filter bag into the ash hopper, and then discharging it through the ash discharge mechanism. In the existing structure, the filter bag is nested outside the frame. When the airflow is injected through the jet pipe and backflowed by the venturi tube, the deformation range is small, resulting in poor dust removal. Furthermore, in order to achieve better cleaning results, the air-filling action needs to be repeated multiple times, which can easily damage the filter bag. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a pulse bag filter to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a pulse jet baghouse dust collector, comprising: a frame, an ash discharge device installed inside the frame, connected to a top filter box via the ash discharge device, an air outlet pipe installed on the side of the filter box, and a nested connection between the top and a top plate; the filter box includes a housing, an air jet pipe installed on the top of the housing, the air jet pipe being connected to an air storage device installed on the frame platform, a filter bag assembly installed at the bottom of the air jet pipe, the filter bag assembly being mounted in a groove within the housing and engaged with the top of the side groove of the housing, an ash hopper at the bottom of the housing, the ash hopper being connected to the bottom ash discharge device, and an inlet pipe installed on the side of the ash hopper; a push rod for the filter bag assembly being installed outside the side groove, the push rod driving a first frame and a second frame of the filter bag assembly to move axially via a synchronizing rod, and filter bags being installed on the outside of the frame formed by the first and second frames.

[0006] Preferably, the push rod is installed on the outer surface of the side groove, and the movable shaft of the push rod passes through the side groove and is connected to the baffle installed inside the box. The baffle is fixedly connected to the synchronizing rods installed on both sides of the top of the first frame. The push rod controls the up and down movement of the baffle, thereby driving the synchronizing rods.

[0007] Preferably, the first frame includes a first rod, the bottom of which is provided with a bottom ring, and the top of the first rod is provided with a second rod and a third rod in sequence. The third rod is slidably connected to the second frame, and the top of the third rod is provided with a limiter and connected to a synchronization rod through the limiter.

[0008] Preferably, the diameter of the second rod is smaller than the diameters of the third rod and the first rod.

[0009] Preferably, the second frame includes a frame consisting of a top frame and a bottom frame, wherein the diameter of the top frame is larger than the diameter of the bottom frame, and the bottom frame and the top frame are provided with two or more protective rings, the top of the top frame is provided with a top sleeve, and the top frame is provided with sliding tubes evenly distributed inside the top frame.

[0010] Preferably, the length of the second frame is the same as the length of the filter bag, and the bottom edge of the first frame has a rounded chamfer, the diameter of the bottom ring is the same as the diameter of the top frame.

[0011] Preferably, the top of the second frame is nested with a timing plate, and the timing plate is provided with a venturi tube in the middle. The timing plate is nested with the third rod of the first frame, and the third rod slides in the hole of the timing plate and inside the slide tube.

[0012] Preferably, the bottom ring is slidably connected to the slide tube installed inside the top frame via the third rod at the top of the second rod, and is fixedly limited by the synchronization ring of the limiter.

[0013] Preferably, the limiter includes a main board and a collar. The collar is sleeved with a synchronizing rod, and the main board is connected to the collar. A secondary plate that can swing left and right is installed at the pivot of the collar. The secondary plate is connected to the synchronizing ring through a fastener at the top, and the surface of the secondary plate is provided with a limiting groove, which is nested with the edge of the synchronizing ring.

[0014] Preferably, when the fastener is loosened, the sub-plate can be deflected laterally, causing the limiting groove to disengage from the edge of the synchronization ring to release the limiting of the third rod.

[0015] This invention discloses a pulse jet baghouse dust collector with the following advantages: By controlling the relative displacement between the first and second frames via a push rod, the filter bags can achieve an alternating tight and loose working state. When the filter bags are in a tight state, surface wrinkles are reduced, dust has fewer adhesion points, and it is easier for natural desorption during filtration. When the first frame retracts, causing the filter bags to relax, the backlash effect of the pulse airflow enables the filter bags to generate a larger amplitude, thereby quickly and thoroughly shaking off the dust. This structure significantly improves the dust removal efficiency, reduces the dust removal frequency, and thus effectively extends the service life of the filter bags.

[0016] The limiter adopts a quick-release structure design. The collar connects to the main board and is fitted onto the synchronizing rod, while the front auxiliary plate is a movable structure. During operation, the auxiliary plate and the synchronizing ring are locked together by fasteners to ensure the stability of synchronous operation. During maintenance, simply loosening or tightening the fasteners to allow the auxiliary plate to deflect laterally releases the limit interference, enabling quick disassembly of the filter bag assembly and making operation extremely convenient. Attached Figure Description

[0017] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a pulse bag filter according to the present invention.

[0018] Figure 2 This is a schematic diagram of the box structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the filter bag assembly of the present invention.

[0020] Figure 4 This is a schematic diagram of the structure of the first frame of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of the second frame of the present invention.

[0022] Figure 6 For the present invention Figure 4 An enlarged schematic diagram of structure a in the middle.

[0023] Figure 7 This is a schematic diagram of the explosion mechanism of the first and second frames of the present invention.

[0024] In the picture: 1. Filter box; 2. Top plate; 3. Air outlet pipe; 4. Frame; 5. Ash discharge device; 11. Housing; 12. Filter bag assembly; 13. Side channel; 14. Air jet pipe; 15. Gas storage device; 16. Ash hopper; 17. Discharge pipe; 121. First frame; 122. Second frame; 123. Filter bag; 124. Synchronizing baffle; 125. Venturi tube; 126. Push rod; 127. Baffle; 128. Synchronizing rod; 151. Ring; 152. Main board; 153. Sub-board; 154. Limiting groove; 155. Fastener; 156. Synchronizing ring; 211. First rod; 212. Bottom ring; 213. Second rod; 214. Third rod; 215. Limiter; 221. Top frame; 222. Bottom frame; 223. Protective ring; 224. Sliding tube; 225. Top sleeve. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 a part of the embodiments of the present invention, not all of them. 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. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. 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.

[0026] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] In existing filter bags, nested outside the frame, the deformation range during airflow injection through the jet pipe and backflow under the action of the venturi tube is relatively small, resulting in poor dust removal. Furthermore, repeated inflation is required to achieve better cleaning, which can easily damage the filter bags. Therefore, to solve the above problems, this paper proposes the following technical solution: See Figures 1 to 7 This invention provides a technical solution for a pulse jet baghouse dust collector: its structure includes a frame 4, inside which a dust discharger 5 is installed, and a filter box 1 is connected to the top of the dust discharger 5. An air outlet pipe 3 is also installed on the side of the filter box 1, and its top is nested with a top plate 2. The filter box 1 includes a housing 11, and a jet pipe 14 is installed on the top of the housing 11, which is connected to an air storage device 15 installed on the platform of the frame 4. A filter bag assembly 12 is installed at the bottom of the jet pipe 14, and the filter bag assembly 12 is snapped onto the top of the side groove 13 of the housing 11. A dust hopper 16 is provided at the bottom of the housing 11, which is connected to the dust discharger 5 at the bottom, and an inlet pipe 17 is installed on the side of the dust hopper 16. The push rod 126 of the filter bag assembly 12 is installed outside the side groove 13. The push rod 126 drives the first frame 121 and the second frame 122 of the filter bag assembly 12 to move relative to each other along the axial direction through the synchronizing rod 128. The filter bag 123 is sleeved on the outside of the frame composed of the first frame 121 and the second frame 122.

[0028] The main structure of this device includes a filter box 1, which is mounted on a frame 4. The inlet pipe 17 of the filter box 1 connects to the air inlet, introducing exhaust gas into the box body 11. The filter bag assembly 12 then filters the dust, and the purified gas is discharged through the outlet pipe 3 at the top. The dust, under gravity, falls through the ash hopper 16 into the ash discharger 5 for discharge. The top plate 2 installed on the top of the filter box 1 can be opened for easy maintenance of the filter bag assembly 12.

[0029] A jet pipe 14 is installed at the top of the filter bag assembly 12. The jet pipe 14 is connected to an air storage device 15. The air storage device 15 injects high-pressure airflow from the jet pipe 14 into the filter bag assembly 12, causing the filter bag 123 to expand and shake off the dust adhering to its surface. However, in the traditional structure, the filter bag 123 is nested outside the frame. The deformation range produced by the airflow injected by the jet pipe 14 and the backflow of the airflow from the venturi tube 125 is small, resulting in poor dust removal effect. Moreover, in order to achieve a better cleaning effect, the inflation action needs to be repeated many times, and the filter bag 123 is easily damaged under frequent operation.

[0030] To address this, the device has been optimized to reduce the cleaning frequency of the filter bags 123. The filter bag assembly 12 is nested within the holes of the inner cavity partition of the housing 11, with push rods 126 on both sides. The push rods 126 drive the central synchronizing rod 128 via a baffle 127, causing the first frame 121 to slide on the second frame 122, thereby changing the internal support state of the filter bags 123 and creating a larger gap between the filter bags 123 and the frames. This increases the overall amplitude during air injection and backflow. The push rods 126 are installed on both sides of the side groove 13 and located outside the housing 11, thus preventing dust from affecting them.

[0031] Specifically, the cooperation relationship between the first frame 121 and the second frame 122 is as follows: The first frame 121 includes a first rod 211, and a bottom ring 212 is provided at the bottom of the first rod 211 to press down the bottom of the filter bag 123 so that it is in a fully taut state. In this way, the wrinkles of the filter bag 123 can be reduced during filtration, so that the dust loses its adhesion points, thereby improving the natural desorption effect.

[0032] The top of the first rod 211 is provided with an inwardly bent second rod 213. During airflow, the filter bag 123 located near the second rod 213 has a large shaking space, further improving dust removal efficiency under taut and planar shaking conditions. A third rod 214 at the top of the second rod 213 is connected to a limiter 215, and the third rod 214 passes through a synchronous baffle 124 for protection. The limiter 215 and the synchronous rod 128 operate synchronously, causing the third rod 214 and the components below it to slide inside the slide tube 224 of the second frame 122, thereby changing the relative position of the first frame 121 and the second frame 122.

[0033] The top frame 221 of the second frame 122 has a diameter similar to that of the filter bag 123, allowing it to be opened when fitted together. The top sleeve 225 facilitates the insertion of the filter bag 123 and prevents damage to the filter bag 123 from the edges of the top frame 221. The bottom frame 222 at the bottom of the top frame 221 supports the frame formed by the third rod 214 and the second rod 213. To prevent collapse, it is equipped with two or more protective rings 223. While providing support, the protective rings 223 also disperse the airflow to various areas when airflow enters, thereby improving the dust removal effect.

[0034] To reduce the number of push rods 126, a limiter 215 at the top of the third rod 214 is connected in series with the synchronizing rod 128. Simultaneously, to facilitate maintenance of the individual first frame 121, the limiter 215 is designed as a detachable structure. Specifically, the limiter 215 has a collar 151 that engages with the synchronizing rod 128. The collar 151 is connected to the main board 152, keeping the main board 152 fixed to reduce vibration. The main board 152 is connected to the sub-board 153 via a movable shaft. The sub-board 153 has a limiting groove 154 at its front end, which engages with the synchronizing ring 156. The synchronizing ring 156 is connected and fixed to the third rod 214, thereby locking and limiting the third rod 214.

[0035] After the secondary plate 153 engages with the synchronizing ring 156, it is locked in place by fastener 155. During disassembly, simply loosen the fastener 155 and swing the secondary plate 153 to the side to quickly separate it from the synchronizing ring 156, facilitating maintenance.

[0036] Under normal filtration conditions: Activate push rod 126, which drives the first frame 121 to slide via synchronizer rod 128, allowing the first frame 121 and the second frame 122 to fully extend. At this time, bottom ring 212 presses against the bottom of the filter bag, and the filter bag 123 is in a fully inflated and taut state. Exhaust gas enters the housing 11 from the discharge pipe 17, passes through the filter bag 123 for filtration, and clean gas is discharged from the outlet pipe 3. Because the filter bag is taut, wrinkles are reduced, dust is less likely to adhere, and some dust naturally detaches and falls into the ash hopper 16 under gravity.

[0037] In pulse cleaning mode: When dust accumulates on the filter bag surface, increasing resistance, the cleaning program is activated. The control push rod 126 retracts, causing the first frame 121 to slide downwards within the slide tube 224 of the second frame 122. The filter bag 123 loses its internal support and becomes relaxed. The air storage device 15 instantly releases high-pressure airflow, which is injected into the filter bag 123 through the jet pipe 14. Under the backflow of the airflow, the relaxed filter bag vibrates significantly, and the dust adhering to its surface is quickly and thoroughly shaken off. After cleaning, the push rod 126 extends again, and the filter bag returns to a taut filtration state. This design significantly reduces the number of pulses required for cleaning, extending the filter bag's lifespan.

[0038] The improved device controls the distance between the first frame 121 and the second frame 122 via a push rod 126, thus keeping the filter bag 123 in an alternating state of tension: when taut, it facilitates the natural shedding of dust during filtration; when the first frame 121 retracts, the surface of the filter bag 123 becomes loose, allowing dust to be quickly shaken off during the backwash of the pulsed airflow. This not only improves the cleaning efficiency but also reduces the cleaning frequency and extends the service life of the filter bag 123.

[0039] Furthermore, for ease of maintenance, the collar 151, which is fitted with the synchronizing rod 128, is connected to the main board 152, and the front-end sub-plate 153 is designed as a movable structure. During operation, the sub-plate 153 and the synchronizing ring 156 are locked together by the fastener 155 to achieve synchronized operation; when separation is required, simply loosen the fastener 155 to allow the sub-plate 153 to shift laterally to release the interference, making operation more convenient.

[0040] The above description only outlines the basic principles and preferred embodiments of the present invention. Those skilled in the art can make many changes and modifications based on the above description, and these changes and modifications should fall within the protection scope of the present invention.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pulse jet bag filter, comprising: A frame (4) is provided with an ash discharge device (5) installed inside the frame (4). The ash discharge device (5) is connected to the top filter box (1). An air outlet pipe (3) is also installed on the side of the filter box (1). The top is nested with the top plate (2). The filter box (1) includes a box body (11). An air jet pipe (14) is installed on the top of the box body (11). The air jet pipe (14) is connected to an air storage device (15) installed on the table of the frame (4). A filter bag assembly (12) is installed at the bottom of the air jet pipe (14). The filter bag assembly (12) is installed in the groove of the box body (11). The top of the side groove (13) of the box (11) is engaged. The bottom of the box (11) is provided with a ash hopper (16). The ash hopper (16) is connected to the ash discharge device (5) at the bottom. The side of the ash hopper (16) is equipped with an inlet pipe (17). The push rod (126) of the filter bag group (12) is installed outside the side groove (13). The push rod (126) drives the first frame (121) and the second frame (122) of the filter bag group (12) to move axially through the synchronizing rod (128). The filter bag (123) is installed on the outside of the frame composed of the first frame (121) and the second frame (122).

2. The pulse bag filter as described in claim 1, characterized in that: The push rod (126) is installed on the outer surface of the side groove (13). The movable shaft of the push rod (126) passes through the side groove (13) and is connected to the baffle (127) installed inside the box (11). The baffle (127) is fixedly connected to the synchronizing rod (128) installed on both sides of the top of the first frame (121). The push rod (126) controls the baffle (127) to move up and down, thereby driving the synchronizing rod (128).

3. The pulse bag filter as described in claim 1, characterized in that: The first frame (121) includes a first rod (211), the bottom of the first rod (211) is provided with a bottom ring (212), the top of the first rod (211) is provided with a second rod (213) and a third rod (214) in sequence, the third rod (214) is slidably connected to the second frame (122), the top of the third rod (214) is provided with a limiter (215), and a synchronization rod (128) is connected through the limiter (215).

4. A pulse bag filter as described in claim 3, characterized in that: The diameter of the second rod (213) is smaller than the diameters of the third rod (214) and the first rod (211).

5. A pulse bag filter as described in claim 1, characterized in that: The second frame (122) includes a frame consisting of a top frame (221) and a bottom frame (222). The diameter of the top frame (221) is larger than the diameter of the bottom frame (222). The bottom frame (222) and the top frame (221) are provided with two or more protective rings (223). The top of the top frame (221) is provided with a top sleeve (225). The top frame (221) is provided with sliding tubes (224) evenly distributed inside.

6. A pulse bag filter as described in claim 5, characterized in that: The length of the second frame (122) is the same as the length of the filter bag (123), and the bottom ring (212) of the first frame (121) has a rounded chamfered edge, and the diameter of the bottom ring (212) is the same as the diameter of the top frame (221).

7. A pulse bag filter as described in claim 5, characterized in that: The top of the second frame (122) is nested with a timing plate (124), and the timing plate (124) is provided with a venturi tube (125) in the middle. The timing plate (124) is nested with the third rod (214) of the first frame (121), and the third rod (214) slides in the hole of the timing plate (124) and inside the slide tube (224).

8. A pulse bag filter as described in claim 3, characterized in that: The bottom ring (212) is slidably connected to the slide tube (224) installed inside the top frame (221) via the third rod (214) at the top of the second rod (213), and is fixedly limited by the synchronization ring (156) of the limiter (215).

9. A pulse bag filter as described in claim 8, characterized in that: The limiter (215) includes a main board (152) and a collar (151). The collar (151) is sleeved with the synchronizing rod (128). The main board (152) is connected to the collar (151). A secondary plate (153) that can swing left and right is installed at the pivot of the collar (151). The secondary plate (153) is connected to the synchronizing ring (156) through a fastener (155) at the top. The surface of the secondary plate (153) is provided with a limiting groove (154), which is nested with the edge of the synchronizing ring (156) through the limiting groove (154).

10. A pulse bag filter as described in claim 9, characterized in that: When the fastener (155) is loosened, the subplate (153) can be deflected to the side, causing the limiting groove (154) to disengage from the edge of the synchronizing ring (156) to release the limiting of the third rod (214).

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