Automatic cleaning cloth bag dust collector

Abstract

The application relates to the technical field of dust collectors, in particular to a cloth bag dust removal device with automatic cleaning, which is a dust removal system composed of a plurality of cloth bags vertically arrayed and hung on the upper half of the inner part of a dust removal box body, the inside of each cloth bag is provided with a cleaning mechanism for lifting and folding the cloth bag at equal intervals and torsion winding, so as to shake off the dust on the surface of the cloth bag. The servo motor drives the cable to drive the lifting plate to ascend, a plurality of bag lifting hoops are arranged at equal intervals on the inner wall of the cloth bag, the cloth bag is folded at equal intervals along the axial direction, the linkage rod is inserted into the inclined guide opening of the bag lifting hoop, the adjacent bag lifting hoops are triggered to alternately horizontally reverse deflect, so that the cloth bag surface forms a multi-section torsion winding state in different directions, the adhesion state of the dust on the cloth bag surface is completely destroyed, the dust loses the adhesion force and falls off in a large area, and the defects that the existing torsion dust removal is twisted and deformed along the height direction of the cloth bag and the dust removal is uneven are overcome.

Description

Technical Field

[0001] This invention relates to the field of dust collector technology, specifically to an automatic cleaning bag filter dust collector. Background Technology

[0002] During long-term operation, dust gradually accumulates on the surface of the filter bags in baghouse dust collectors, leading to increased filtration resistance and decreased dust removal efficiency. Therefore, dust removal is a crucial aspect to ensure continuous operation. Existing dust removal methods mainly include three categories: mechanical vibration rapping, reverse airflow cleaning, and pulse jet cleaning.

[0003] While pulse jet cleaning offers the best cleaning effect, it relies on a compressed air source and numerous pulse valves and jet pipes, resulting in system complexity, susceptibility to malfunctions, and the potential for dust to be washed into adjacent filter bags during cleaning, causing secondary pollution. Furthermore, the gas injected into the pulse jet chamber requires depressurization, and inadequate depressurization and dust prevention measures can easily lead to dust overflow. Additionally, it incurs high structural and maintenance costs.

[0004] Patent application CN202512021784.7 discloses a combined bag filter dust collector. This patent abandons the traditional frame structure and installs a disc at the bottom of the bag. The disc rotates to cause the bag to twist and deform. The folds on the outer surface of the bag rub against each other when the bag twists, which promotes the shedding of the dust layer.

[0005] However, the torsion is only driven from the bottom end, and the degree of torsion gradually decreases along the height of the bag. The upper part of the bag is not sufficiently deformed by torsion, resulting in insufficient uniformity of dust removal. Furthermore, large-angle torsion can easily damage the bag structure and affect filtration performance, leading to increased maintenance costs. In addition, there is still room for improvement in the peeling effect of dense ash layers by relying on torsion friction for dust removal. Summary of the Invention

[0006] In order to overcome the defects in the prior art, the present invention aims to provide an automatic cleaning bag dust collector, which combines lifting and folding the bag at equal intervals with small-amplitude twisting to peel off and vibrate away the dust accumulated on the surface of the bag; and uses the inertial force generated by the falling of the bag to peel off the dense dust layer over a large area again, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides an automatic cleaning bag dust collector, which is a dust collection system consisting of several bags vertically arrayed and suspended inside the upper half of the dust collector box. Each bag is equipped with a cleaning mechanism inside, which is used to lift the bag, fold and twist it at equal intervals, thereby peeling off and vibrating away the dust on the surface of the bag. After the bag is released and reset, it can use its own repeated twisting deformation and rebound to peel off the accumulated dust over a large area again under the action of shear force and inertial force. The cleaning mechanism includes a bag-pressing sleeve fixedly fitted to the upper end of the bag, a pair of pull cables suspended inside the bag, and a reel wound around the upper end of the pull cables; several reels in each row are driven to rotate coaxially by a drive shaft and a motor; several bag-lifting hoops are fixedly provided at equal intervals on the inner wall of the bag, and a pull plate is fixedly provided at the bottom end of the pair of pull cables. The pull plate is fitted and fixedly fitted to the bottom of the bag. When the pull plate rises, it triggers several bag-lifting hoops to overlap, thereby causing the bag to fold up. At the same time, through the guide rod and the inclined groove insertion method, it triggers several bag-lifting hoops to deflect relative to the pull plate, thereby causing the bag to twist. The bottom of the bag-pressing sleeve is equipped with several nozzles. Water is supplied by a water pipe through the water inlet at the top of the bag-pressing sleeve, and the water is sprayed out through the nozzles to rinse the cloth bag.

[0008] As a further improvement to this technical solution, the inside of the pressure bag sleeve is a hollow structure and its top surface is connected to several water injection nozzles, which are embedded in the bottom surface of the pressure bag sleeve in a ring.

[0009] As a further improvement to this technical solution, the pull plate is made of solid self-weight material and has symmetrical linkage rods embedded at its top edge. The bag handle is a ring with a rectangular cross-section and a pair of insertion ports are opened through its top and bottom surfaces. A sloping guide is opened on one side of the insertion port to guide the linkage rod to slide into the insertion port, thereby causing the bag handle to deflect relative to the pull plate.

[0010] As a further improvement to this technical solution, the two inclined guide openings on the bag hoop face opposite directions, and when the bag is in its natural state, the inclined guide openings correspond to the top of the linkage rod.

[0011] As a further improvement to this technical solution, the inclined guide openings of two adjacent bag handles face opposite directions, and when the bag is in its natural state, the inclined guide opening corresponds to the top of the linkage rod.

[0012] As a further improvement to this technical solution, the height of the linkage rod is equal to the total thickness of several bag hoops.

[0013] As a further improvement to this technical solution, the thickness of the bag handle is t, the height of the bag is h, the number of bag handles is n, and the distance between two adjacent bag handles is l=h / (n+1), where n+1 represents the number of distances between the bag and the n bag handles, so t=l / n.

[0014] As a further improvement to this technical solution, a guide rod is provided on the central axis of the filter bag. The cross-section of the guide rod is a polygonal surface, and its upper end is hung on the drive shaft. Its lower end passes through the center of the pull plate and is fixedly connected to a fixing rod. The fixing rod is horizontally embedded in the two side walls of the dust collector.

[0015] As a further improvement to this technical solution, a ring is provided protruding from the inner wall of the bottom end of the bag-pressing sleeve for clamping the upper end of the cloth bag.

[0016] As a further improvement to this technical solution, a connecting platform is provided at the center of the bottom surface of the pull plate. The connecting platform passes through the center hole of the bottom surface of the cloth bag and is fixedly connected with fasteners.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This automatic cleaning bag dust collector uses a servo motor-driven cable to raise the pull plate, which, together with several bag-lifting hoops evenly spaced on the inner wall of the bag, causes the bag to fold up axially at equal intervals. Simultaneously, through the insertion and engagement of the linkage rod with the inclined guide of the bag-lifting hoop, adjacent bag-lifting hoops are triggered to alternately deflect horizontally in opposite directions, thereby forming a multi-segment twisted state in different directions on the surface of the bag. This completely destroys the adhesion of dust on the surface of the bag, causing the accumulated dust to lose its adhesion and fall off over a large area. This overcomes the defects of existing twisted cleaning methods, such as twisting deformation and attenuation along the height of the bag, and uneven cleaning.

[0018] 2. The automatic cleaning bag dust collector uses a pull plate made of solid lead block material. After the pull cable is released, the pull plate descends rapidly by its own weight, instantly stretching and restoring the folded and twisted bag. The inertial force generated by the stretching and instantaneous rebound of the bag is used to perform secondary vibration and peeling off the residual dust on the surface of the bag, achieving a dual dust removal effect and significantly improving the dust removal efficiency.

[0019] 3. This automatic cleaning bag filter dust collector, by setting an annularly distributed nozzle at the bottom of the bag press sleeve and connecting it to an external water pump, can only be used as a one-time deep cleaning method to rinse the filter bags in extreme working conditions such as long-term equipment shutdown for maintenance or failure caused by special sticky dust. This avoids the damage to the filter bags and the burden of wastewater treatment caused by frequent water washing during daily operation. Attached Figure Description

[0020] The accompanying drawings described herein are for illustrative purposes only. The shapes and proportions of the components in the drawings are merely schematic and intended to aid in understanding the invention. They are not intended to specifically limit the shapes and proportions of the components of the invention.

[0021] Figure 1 This is a front view of the overall internal assembly of the present invention; Figure 2 A front view of the cleaning mechanism assembly of the present invention; Figure 3 Top view of the cleaning mechanism assembly of the present invention; Figure 4 For the present invention Figure 2 A cross-sectional view of the internal assembly of the cloth bag; Figure 5 For the present invention Figure 4Isometric drawing; Figure 6 This is a partial exploded view of the cleaning mechanism of the present invention; Figure 7 This is a breakdown diagram of the pull plate and cloth bag of the present invention; Figure 8 This is a schematic diagram showing the distribution of several bag-holding hoops according to the present invention; Figure 9 This is a schematic diagram showing the distribution of several bag hoops of the present invention in full cross-section and from a bottom view. The meanings of the labels in the diagram are as follows: 100. Dust collector housing; 110. Filter bag; 200. Cleaning mechanism; 210. Bag pressing sleeve; 211. Water inlet nozzle; 212. Ring sleeve; 220. Pull cable; 221. Pull plate; 222. Linkage rod; 223. Connecting platform; 230. Reel; 240. Servo motor; 250. Bag lifting hoop; 251. Insert; 252. Angled guide; 260. Guide rod; 261. Fixing rod. Detailed Implementation

[0022] The specific embodiments described herein are for illustrative purposes only. Under the guidance of this invention, any possible variations of the invention by those skilled in the art should be considered within its scope. The directional terms used herein are based on the orientations shown in the accompanying drawings and are for ease of description and simplification; therefore, they should not be construed as limitations on the invention. Furthermore, in the description of this invention, "a number" means two or more, unless otherwise explicitly specified.

[0023] Please see Figures 1-6 As shown, this invention provides an automatic cleaning bag filter dust collector, which is a dust collection system composed of several vertically arrayed bags 110 suspended inside the upper half of the dust collector housing 100. Each bag 110 is equipped with a cleaning mechanism 200, which is used to lift the bags 110, fold them at equal intervals, and twist them to peel off the dust accumulated on the surface of the bags 110. After the bags 110 are released and reset, they can repeatedly twist, deform, and rebound to peel off the accumulated dust over a large area again under the action of shear force and inertial force. This purely mechanical method replaces the traditional dust removal mode that relies on compressed gas, solving the problems of the single direction of the force of traditional mechanical vibration dust removal and insufficient effect on the removal of dense dust. It fundamentally avoids the dust overflow and pressure relief problems caused by the introduction of gas and saves the cost of using pressure relief and dust prevention devices. The working mode of the cleaning mechanism 200 realizes airless and low-energy dust removal operation, reducing the manufacturing and operation and maintenance costs of the equipment.

[0024] Specifically, the cleaning mechanism 200 includes a bag-pressing sleeve 210 fixedly sleeved to the upper end of the cloth bag 110, a pair of pull cables 220 suspended inside the cloth bag 110, and a reel 230 wound around the upper end of the pull cables 220; each row of several reels 230 is driven to rotate coaxially by a drive shaft and a motor, preferably a servo motor 240, and forward and reverse rotation is achieved by the control signal received by the servo driver or the internal parameter settings, which is prior art and will not be described in detail here; the cloth bag 110 The inner wall of the bag 110 is fixedly provided with several bag-carrying hoops 250 at equal intervals. A pull plate 221 is fixedly provided at the bottom of a pair of pull cables 220. The pull cables 220 are preferably made of steel strand, which is strong and durable. The pull plate 221 is fitted and fixedly sleeved with the bottom of the bag 110. When the pull plate 221 rises, it triggers the stacking of several bag-carrying hoops 250, which drives the bag 110 to fold up. At the same time, through the guide rod and the inclined groove insertion method, it triggers the misalignment and deflection of several bag-carrying hoops 250 relative to the pull plate 221, which in turn drives the bag 110 to twist.

[0025] Furthermore, the bottom of the pressure bag sleeve 210 is equipped with several nozzles. Water is supplied to the top of the pressure bag sleeve 210 via an external water pump, and the water is sprayed out through the nozzles to rinse the filter bag 110. Specifically, the interior of the pressure bag sleeve 210 is hollow, and its top surface is connected to several water inlets 211. The nozzles are arranged in a ring and embedded in the bottom surface of the pressure bag sleeve 210. A ring sleeve 212 protrudes from the inner wall of the bottom end of the pressure bag sleeve 210 to clamp the upper end of the filter bag 110 and to press the filter bag tightly by bolts or hoops.

[0026] Under normal operation, the cleaning mechanism 200 maintains dust removal mechanically without the need for water washing. Only in extreme cases such as long-term equipment shutdown for maintenance or malfunction caused by special sticky dust, is the filter bag 110 rinsed as a one-time deep cleaning method; this avoids damage to the filter bag 110 and the burden of wastewater treatment caused by frequent water washing during daily operation.

[0027] Furthermore, a guide rod 260 is provided on the central axis of the filter bag 110. The cross-section of the guide rod 260 is polygonal, which serves as a limiting function. The upper end of the guide rod 260 is hooked onto the drive shaft, and its lower end passes through the center of the pull plate 221 and is fixedly connected to a fixing rod 261. The fixing rod 261 is horizontally embedded in the two side walls of the dust collector 100. This allows the pull plate 221 to rise and fall along the guide rod 260 without rotating, so as to trigger several bag lifting hoops 250 to deflect.

[0028] A connecting platform 223 protrudes from the center of the bottom surface of the pull plate 221. The connecting platform 223 passes through the center hole of the bottom surface of the cloth bag 110 and is fixedly connected with a fastener, preferably a nut, thereby fixing and sealing the cloth bag 110 and the pull plate 221.

[0029] like Figures 7-9As shown, the pull plate 221 is made of solid self-weight material and has symmetrical linkage rods 222 embedded at its top edge. The self-weight material is lead or iron blocks to increase its weight, so that the pull plate 221 can descend quickly after it is no longer pulled, generating a rebound inertial force on the cloth bag 110, increasing the vibration effect of dust accumulation on the surface of the cloth bag 110, which is conducive to large-area peeling. The bag hoop 250 is a ring with a rectangular cross-section, and a pair of insertion ports 251 are opened through its top and bottom. A sloping guide port 252 is opened on one side of the insertion port 251. The upper end of the linkage rod 222 is an arc surface or a beveled surface. The sloping guide port 252 is used to guide the linkage rod 222 in the rising state to slide into the insertion port 251. Since the pull plate 221 is restricted from rotating by the guide rod 260, the linkage rod 222 drives the bag hoop 250 to deflect relative to the pull plate 221, so that the cloth bag 110 is in a twisted state, generating shear force on its surface, which is conducive to peeling off the accumulated dust.

[0030] Furthermore, the two inclined guide openings 252 on the bag handle 250 face opposite directions, and when the bag 110 is in its natural state, the inclined guide opening 252 corresponds directly above the linkage rod 222; this causes the linkage rod 222 in the rising state to first contact the inclined guide opening 252, pushing the bag handle 250 to deflect and causing the bag 110 in this area to twist, generating shear force on its surface to destroy the dust adhesion state, and then the bag 110 falls off as it is lifted and folded.

[0031] The inclined guide openings 252 of the two adjacent bag handles 250 face opposite directions, and when the bag 110 is in its natural state, the inclined guide openings 252 are directly above the linkage rod 222; this causes the two adjacent bag handles 250 to deflect in opposite directions, thereby forming a multi-segment twisted state with different directions on the surface of the bag 110, completely destroying the dust adhesion state on its surface, and then falling off when the bag 110 is lifted and folded.

[0032] Furthermore, to ensure that the bag 110 is fully folded, the linkage rod passes through all the carrying loops 250 and triggers their deflection; the height of the linkage rod 222 is equal to the total thickness of the carrying loops 250; the thickness of the carrying loops 250 is t, the height of the bag 110 is h, the number of carrying loops 250 is n, and the distance between two adjacent carrying loops 250 is l = h / (n+1), then t = l / n; so that the number of carrying loops 250 stacked together is exactly the distance between two adjacent carrying loops 250; for example, if the height of the bag 110 is h = 2 meters, and the number of carrying loops 250 is n = 9, then l = 2 / 10 = 0.2 meters, t = 0.2 / 9 ≈ 0.02 meters, that is, t is taken as 2 centimeters, and the height of the linkage rod 222 is 18 centimeters.

[0033] When the automatic cleaning bag filter of the present invention is in operation, several servo motors 240 are activated to drive several reels 230 to wind up the cable 220, thereby lifting the pull reel 221 and raising it along the guide rod 260; this causes the linkage rod 222 to rise and successively contact the inclined guide openings 252 of several bag lifting clamps 250, and pass through the insertion openings 251. Since the pull reel 221 is restricted from rotating by the guide rod 260, the linkage rod 222 pushes several bag lifting clamps 250 to alternately deflect horizontally in opposite directions during its upward movement, thereby cleaning the bag filter. The surface of bag 110 forms a multi-segmented twisted state in different directions, completely destroying the dust adhesion state on its surface, and then the bag 110 is lifted and folded off; after the release of pull plate 221, the pull plate 221 can descend quickly by its own weight, which generates a rebound inertial force on bag 110, increasing the vibration effect of dust accumulation on the surface of bag 110, which is conducive to large-area peeling; through this purely mechanical method, the traditional dust removal mode that relies on compressed gas is replaced, fundamentally avoiding the dust overflow and pressure relief problems caused by the introduction of gas.

[0034] It should be noted that the fixed connection and fixing method of the present invention are achieved by conventional fixing means such as bolt connection, welding, or bonding that are compatible with each other. These are existing technologies and will not be described in detail here. The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic cleaning bag filter dust collector, comprising a dust collection system consisting of several bags (110) vertically arrayed and suspended inside the upper half of a dust collector housing (100), characterized in that: Each of the cloth bags (110) is equipped with a cleaning mechanism (200) for lifting the cloth bags (110) to fold and twist at equal intervals, thereby peeling off and vibrating away the dust on the surface of the cloth bags (110). After the cloth bags (110) are released and reset, they can use their own repeated twisting deformation and rebound to peel off the dust over a large area again under the action of shear force and inertial force. The cleaning mechanism (200) includes a bag-pressing sleeve (210) fixedly fitted to the upper end of the cloth bag (110), a pair of pull cables (220) suspended inside the cloth bag (110), and a reel (230) wound around the upper end of the pull cables (220); each row of several reels (230) is driven to rotate coaxially by a transmission shaft and a motor; several bag-lifting hoops (250) are fixedly provided at equal intervals on the inner wall of the cloth bag (110), and a pull plate (221) is fixedly provided at the bottom end of the pair of pull cables (220). The pull plate (221) is adapted to and fixedly fitted to the bottom of the cloth bag (110). When the pull plate (221) rises, it triggers several bag-lifting hoops (250) to overlap and drive the cloth bag (110) to fold up. At the same time, through the guide rod and the inclined groove insertion method, it triggers several bag-lifting hoops (250) to deflect relative to the pull plate (221), thereby driving the cloth bag (110) to twist and turn; The bottom of the pressure bag cover (210) is provided with several nozzles. Water is supplied by a water pipe through the water inlet at the top of the pressure bag cover (210) and sprayed out through the nozzles to rinse the cloth bag (110).

2. The automatic cleaning bag filter dust collector according to claim 1, characterized in that: The inside of the pressure bag sleeve (210) is a hollow structure and its top surface is connected to several water injection nozzles (211), and several nozzles are embedded in the bottom surface of the pressure bag sleeve (210) in a ring.

3. The automatic cleaning bag filter dust collector according to claim 2, characterized in that: The pull plate (221) is made of solid self-weight material and has symmetrical linkage rods (222) embedded at its top edge. The bag hoop (250) is a ring with a rectangular longitudinal section and has a pair of inlets (251) through its upper and lower surfaces. A sloping guide (252) is provided on one side of the inlet (251) to guide the linkage rod (222) to slide into the inlet (251), thereby causing the bag hoop (250) to deflect relative to the pull plate (221).

4. The automatic cleaning bag filter dust collector according to claim 3, characterized in that: The two inclined guides (252) on the bag hoop (250) face opposite directions, and when the bag (110) is in its natural state, the inclined guides (252) correspond to the top of the linkage rod (222).

5. The automatic cleaning bag filter dust collector according to claim 4, characterized in that: The inclined guides (252) of two adjacent bag hoops (250) face opposite directions, and when the bag (110) is in its natural state, the inclined guides (252) correspond to the top of the linkage rod (222).

6. The automatic cleaning bag filter dust collector according to claim 5, characterized in that: The height of the linkage rod (222) is equal to the total thickness of several bag hoops (250).

7. The automatic cleaning bag filter dust collector according to claim 6, characterized in that: The thickness of the bag handle (250) is t, the height of the bag (110) is h, the number of bag handles (250) is n, and the distance between two adjacent bag handles (250) is l=h / (n+1), where n+1 represents the number of distances between the bag (110) and the n bag handles (250), so t=l / n.

8. The automatic cleaning bag filter dust collector according to claim 7, characterized in that: A guide rod (260) is provided on the central axis of the cloth bag (110). The cross-section of the guide rod (260) is a polygonal surface, and its upper end is hung on the drive shaft. Its lower end passes through the center of the pull plate (221) and is fixedly connected to a fixing rod (261). The fixing rod (261) is horizontally embedded in both sides of the dust collector (100).

9. The automatic cleaning bag filter dust collector according to claim 8, characterized in that: The inner wall of the bottom end of the pressure bag sleeve (210) is provided with a ring sleeve (212) for clamping the upper end of the cloth bag (110).

10. The automatic cleaning bag filter dust collector according to claim 9, characterized in that: The bottom center of the pull plate (221) is provided with a connecting platform (223), which passes through the center hole of the bottom surface of the cloth bag (110) and is fixedly connected with fasteners.

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