Double-air-duct industrial bag-type dust collector

Abstract

The invention relates to the technical field of flue gas purification, in particular to a double-air-duct industrial bag-type dust collector, which comprises a dust collector body, a tubesheet, a plurality of cloth bags and a bag cage, the tubesheet is installed in the dust collector body, bag openings of the plurality of cloth bags are installed on the tubesheet in an array, and the bag cage is installed in the cloth bags and extends to the upper end face of the tubesheet. By arranging the cover plate assembly and the trigger piece, unpurified flue gas is discharged out of a room from a gas guide hole due to damage of a cloth bag, particulate matters in the flue gas can block a filter screen while the particulate matters in the flue gas are prevented from being discharged by the filter screen, and due to continuous discharge of the flue gas, the filter screen protrudes upwards due to pressure, so that a movable circular plate rotates under the action of elastic force; the movable circular plate and the clamping plates are of a crank sliding block structure, and in the rotating process of the movable circular plate and the clamping plates, the gap between the two clamping plates is reduced until the gas guide hole is closed, so that leakage of unpurified flue gas is avoided, and maintenance personnel of the closed gas guide hole can easily find and replace a damaged cloth bag.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas purification, in particular to a double-duct industrial bag dust collector. Background Art

[0002] When the double-duct industrial bag pulse dust collector is working, the dust-laden gas first enters the equipment through the air inlet and collides with the middle inclined plate and baffle, so the airflow direction changes and flows into the ash hopper after deceleration. Under the action of inertia, the coarse dust particles settle directly into the ash hopper, thus completing the pre-dust removal. Then the airflow passes through the bag with a metal skeleton inside, and the dust is captured on the outer surface of the bag, while the purified gas flows into the upper cleaning chamber of the bag room and is discharged from the air outlet. The dust bag is a key component of the bag dust collector. The bag is generally made of cloth fiber material, which is easily affected by temperature and easily scratched by the sharp and hard frame edges. During the use of the bag, the wear of the flue gas and the expansion of the bag by reverse cleaning cause the small scratches on the bag to gradually expand until the bag is damaged during the operation of the bag dust collector, causing the unpurified flue gas to leak and the dust removal to fail.

[0003] In view of the above problems, the prior art provides some solutions. For example, by arranging manual inspections regularly, after stopping the dust removal fan or closing the inlet and outlet of a single chamber, the dust collector chamber cover is opened, and the bags are pulled out for inspection where there is dust. Due to the large number of bags, the manual inspection method is time-consuming, untimely and easy to miss for the inspection of damaged bags. In addition, in the traditional method, the judgment of bag damage is based on the smoke coming out of the chimney. It is impossible to accurately identify the situation where only a small number of bags are damaged. For example, the invention disclosure of patent application No. CN201410276774.7 provides a bag dust collector cover and a method for detecting bag damage. Method: The cover plate surface is made of transparent material, which can visually monitor the damaged and leaking bags when the dust removal equipment is in operation, so that the bags can be replaced in time and accurately. A number of supporting ribs are arranged on the cover plate surface to strengthen the strength of the cover plate surface, and movable edge sealing is used to facilitate the replacement of the cover plate surface. However, the transparent material of the cover plate in this solution is easily covered by pollutants in the flue gas after being blown by the flue gas for a long time, which makes it impossible for inspectors to see the damaged bags among the many bags, making it impossible for manual inspection to identify the damaged bags in time. In this process, the dust collector will leak a large amount of unpurified flue gas, resulting in a decrease in the dust removal effect of the dust collector. Summary of the invention

[0004] The purpose of the present invention is to provide a dual-duct industrial bag dust collector to solve the problem that the dual-duct industrial bag dust collector has too high a bag installation density. When individual bags are damaged and leak, manual inspection cannot identify the damaged bags in time. In this process, the dust collector will leak a large amount of unpurified flue gas. When the above problem occurs on the bags, it is easy to affect the filtering effect of the bag-type dust collector, thereby failing to effectively collect the exhaust gas, and at the same time solving the shortcomings of the existing technical solutions.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A dual-duct industrial bag dust collector comprises a dust collector body, a flower plate, a cloth bag and a bag cage, wherein the flower plate is installed in the dust collector body, and the bag openings of a plurality of the cloth bags are installed in an array on the flower plate, and the bag cage is installed in the cloth bag and extends to the upper end surface of the flower plate. Specifically, the opening of the bag cage is set as an air guide hole, and gaskets are provided on both sides of the bag cage, and a cover plate assembly is provided on the gasket, and the cover plate assembly comprises a fixed circular plate and a clamping block fixed on the gasket, and two of the clamping blocks are slidably installed between the fixed circular plates, and a gap is provided between the two clamping blocks, and the width of the gap is the same as the diameter of the air guide hole. A trigger member is also provided at the opening of the bag cage, and when the internal pressure of the cloth bag reaches a set value, the trigger member triggers the cover plate assembly to drive the clamping blocks on both sides to fit together.

[0007] It is easy to understand that due to the damage of the cloth bag, unpurified flue gas is discharged to the outside through the air duct. While the trigger prevents the smoke from being discharged, the particles in the smoke will block the trigger. Due to the continuous discharge of smoke, the trigger bulges upward due to pressure, causing the movable circular plate to rotate due to elastic force. The movable circular plate and the clamping plate are a crank slider structure. During its rotation, the gap between the two clamping plates decreases until the air duct is closed, thereby avoiding the leakage of unpurified flue gas. Since the closed air duct is in a different state from the surrounding air ducts, maintenance personnel can easily find and replace the damaged cloth bag.

[0008] Preferably, the cover plate assembly also includes a movable circular plate, a spring and a ratchet groove, the movable circular plate is provided with a waist-shaped guide groove, the clamping block is connected to the guide groove through a convex circle, one end of the guide groove is located on the center line of the outer edge of the movable circular plate, and the other end extends to the center line of the inner edge of the movable circular plate. The number of the guide grooves is the same as that of the clamping block and is symmetrical along the center line of the movable circular plate. One end of the spring is connected to the movable circular plate, and the other end is connected to the fixed circular plate. The initial state of the spring is a stretched state. A ratchet part is also provided on the outer edge of the movable circular plate, the ratchet groove is provided on one side of the ratchet part and is connected to the fixed circular plate, a pawl is provided in the ratchet groove, and the pawl is respectively in contact with the ratchet part and the trigger member.

[0009] It is easy to understand that by installing the cover plate assembly at the opening of each bag, by twisting the movable circular plate clockwise, due to the sliding connection between the guide groove on the movable circular plate and the convex circle on the clamping block, the two form a crank slider mechanism, and the movable circular plate resists the tension of the spring and drives the clamping block to move in the direction of the principle air guide hole until the convex circle moves to the end of the guide groove. The staff no longer applies force to the movable circular plate, and the ratchet part is stuck by the pawl, so that the movable circular plate cannot rotate, and the cover plate assembly completes the arrangement of the initial state; when the bag is damaged, the trigger part moves due to the increase of unpurified flue gas in the bag. The upper deformation bulge pushes the pawl in the ratchet groove out of the ratchet part. Since the pawl and the ratchet part are no longer stuck, the movable circular plate cannot resist the elastic force of the spring and rotates to drive the two clamping blocks to close and complete the sealing of the damaged bag mouth. Since the cover plate assembly is arranged around the air guide hole, the cleaning effect of the high-pressure air on the bag will not be affected too much, thereby ensuring that it can be used on densely packed bags. While avoiding smoke leakage, due to the triggering of the trigger, the maintenance personnel can also quickly find the bag that needs maintenance, which improves the inspection accuracy and reduces the workload.

[0010] Preferably, the trigger member includes an elastic expansion ring and a filter screen, the pore size of the filter screen is 4 to 5 μm, the elastic expansion ring is arranged on the outer edge of the filter screen and cooperates with the opening structure of the bag cage, the filter screen abuts against the ratchet groove, and then the pawl in the ratchet groove is pushed out of the ratchet part, because the pawl and the ratchet part are no longer stuck, the movable circular plate cannot resist the elastic force of the spring and rotates to drive the two clamps to close to complete the closure of the damaged bag mouth, thereby avoiding smoke leakage. Due to the triggering of the filter screen, the maintenance personnel can also quickly find the bag that needs maintenance, thereby improving the inspection accuracy and reducing the workload.

[0011] It is easy to understand that since the diameter of the particles in the flue gas filtered by the bag is between 5μm and 100μm, when the bag is damaged, the unpurified flue gas enters from the damaged part and flows to the air guide hole. By installing a filter at the opening of the bag cage in the same way as the bag, since the pore size of the filter is 4-5μm, the particles in the flue gas are blocked by the filter while the particles on it continue to increase, causing the filter to be quickly blocked. As the flue gas further increases in the bag, the filter bulges and deforms outside the air guide hole due to pressure, and then pushes the ratchet groove out of the ratchet part. Since the pawl and the ratchet part are no longer in contact, the moving circular plate cannot resist the elastic force of the spring and rotates to drive the two clamps to close to complete the closure of the damaged bag mouth, thereby avoiding smoke leakage. Due to the triggering of the filter, maintenance personnel can also quickly find the bag that needs maintenance, thereby improving the inspection accuracy and reducing the workload.

[0012] Preferably, a clamping portion is further provided between the contact surfaces of the clamping block and the fixed circular plate, the clamping portion is in a square shape, and the clamping portion of the clamping block is complementary to the clamping portion of the fixed circular plate.

[0013] It is easy to understand that by setting a clamping part between the contact surface of the clamping block and the fixed circular plate, the freedom of the clamping block to swing up and down is limited, thereby ensuring that the two clamping blocks are parallel when closed, thereby ensuring that unpurified flue gas cannot leak from between the belt cage and the clamping blocks and in the gap, thereby ensuring the dust removal effect of the double-duct industrial bag dust collector.

[0014] Preferably, a U-shaped sealing strip is further provided on the clamping block on one side, and a U-shaped groove matching the U-shaped sealing strip is provided on the opposite clamping block, and the U-shaped sealing strip and the U-shaped groove are interference fit.

[0015] It is easy to understand that in order to avoid the cover assembly being exposed to the flue gas for a long time, causing particulate matter in the flue gas to partially accumulate in the fitting gap of the parts, resulting in incomplete closure of the two clamps when the spring contracts, and the impact of the high-pressure air for cleaning on the two closed clamps, thereby causing the gap to expand and causing unpurified flue gas leakage, a U-shaped sealing strip and a matching U-shaped groove are arranged between the contact surfaces of the two clamps. The mutual cooperation of the two avoids the generation of gaps after the clamps are closed, and the interference fit of the two is achieved through the elastic force of the spring, thereby avoiding the generation of gaps when impacted by high-pressure air, thereby ensuring the sealing of the clamps to the flue gas, thereby ensuring the dust removal effect of the double-duct industrial bag dust collector.

[0016] Preferably, a flexible magnetic sheet matching the shape of the filter screen is further provided in the edge of the filter screen, and a magnet that magnetically repels the flexible magnetic sheet is further provided on the lower end surface of the ratchet groove.

[0017] It is easy to understand that by installing a flexible magnetic sheet inside the edge of the filter, the hardness and quality of the flexible magnetic sheet can ensure that the filter will not bulge upward and deform due to the airflow flowing to the outside during daily use, thereby preventing accidental touch. When the filter is blocked, a magnet that repeles the flexible magnetic sheet is provided on the lower end face of the ratchet groove. The filter only needs to be slightly deformed upward and bulge, so that the ratchet groove moves upward under the magnetic force, and the ratchet cannot lock the circular plate. While improving the triggering accuracy of the cover assembly, the repelling magnetic force further ensures that the filter maintains a streamlined shape, thereby avoiding wrinkles on the filter and increasing wind resistance, thereby ensuring the cleaning effect of the bag.

[0018] Preferably, the upper half of the ratchet portion and the lower half of the pawl are both provided with rounded corners.

[0019] It is easy to understand that since the closing of the clamp is controlled by repulsive magnetism, although the contraction speed of the spring is 0.3 milliseconds, as the gap of the clamp decreases, the repulsive magnetic force decreases, and the height of the ratchet groove also decreases, so that the pawl re-engages with the ratchet part, causing the clamp to be unable to close completely. By setting the rounded corners, during the contact between the rounded corners of the two, the elastic force of the spring makes the rounded corners on the ratchet part and the pawl bounce open after contact, thereby ensuring that the ratchet part and the pawl will not abut during the contraction of the spring, thereby ensuring that the air guide hole can be closed smoothly.

[0020] Preferably, the filter screen is in a semicircular arc shape that is recessed toward the bottom of the cloth bag.

[0021] It is easy to understand that in the daily cleaning process of the double-duct industrial bag dust collector, due to the presence of the filter, the wind resistance of the high-pressure gas increases, and the air circulation efficiency will inevitably decrease. The semi-circular filter design can better cover the entire air guide hole, and its streamlined shape can reduce wind resistance, making the air circulation smoother, thereby more effectively capturing and filtering tiny particles in the air. The general square filter is more stable in structure, but may produce certain resistance in air circulation, especially at the four corners of the filter, which may cause a waste of filter area. Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The present invention provides a cover plate assembly and a trigger. Due to the damage of the bag, unpurified smoke is discharged outdoors from the air guide hole. While the filter screen prevents the smoke from being discharged, the particles in the smoke will block the filter screen. Due to the continuous discharge of smoke, the filter screen bulges upward due to pressure, causing the movable circular plate to rotate due to elastic force. The movable circular plate and the clamping plate are a crank slider structure. During the rotation process, the gap between the two clamping plates is reduced until the air guide hole is closed, thereby avoiding the leakage of unpurified smoke. Since the closed air guide hole is in a different state from the surrounding air guide holes, maintenance personnel can easily find and replace the damaged bag.

[0023] 2. The present invention installs a flexible magnetic sheet inside the edge of the filter. The hardness and quality of the flexible magnetic sheet ensure that the filter will not be deformed and bulged upward due to the airflow to the outside during daily use, thereby preventing accidental touch. The repulsive magnetic force further ensures that the filter maintains a streamlined shape, thereby ensuring the cleaning effect of the bag. When the filter is blocked, the filter only needs to be slightly deformed and bulged upward due to the magnetic repulsion, so that the ratchet groove moves upward due to the magnetic force, and the ratchet cannot lock the circular plate, thereby improving the triggering accuracy of the cover assembly.

[0024] 3. The present invention provides a rounded corner. During the contact between the rounded corners, the rounded corners on the ratchet part and the pawl are bounced apart due to the elastic force of the spring. This ensures that the ratchet part and the pawl will not abut against each other during the contraction of the spring, thereby ensuring that the air guide hole can be closed smoothly.

[0025] 4. The present invention arranges a semi-circular filter. During daily cleaning of the bags of the dual-duct industrial bag dust collector, the wind resistance of the high-pressure gas is increased due to the presence of the filter. The semi-circular filter design can better cover the entire air guide hole, and its streamlined shape can reduce wind resistance, making the air circulation smoother, thereby more effectively capturing and filtering tiny particles in the air. The general square filter is more stable in structure, but may produce certain resistance to air circulation, especially at the four corners of the filter, which may cause a waste of filter area. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the dual-duct industrial bag dust collector of the present invention;

[0027] Figure 2 is a top view of the cover plate assembly;

[0028] Figure 3 It is a schematic diagram of the installation structure of the clamping block and the fixed circular plate;

[0029] Figure 4 It is a schematic diagram of the structural state of the cover assembly after closing;

[0030] Figure 5 for Figure 1 Schematic diagram of the structure at AA in the middle;

[0031] Figure 6 for Figure 1 A schematic diagram of the structure enlarged at B in the middle;

[0032] Figure 7 Schematic diagram of the position of the fillet on the pawl;

[0033] Figure 8 Schematic diagram of the parts structure of the trigger.

[0034] In the figure: 101, flower plate; 102, cloth bag; 103, bag cage; 2, air guide hole; 3, gasket; 4, cover plate assembly; 401, moving circular plate; 4011, guide groove; 402, fixed circular plate; 4022, convex circle; 403, clamping block; 4031, gap; 4032, clamping part; 4033, U-shaped sealing strip; 4034, U-shaped groove; 404, spring; 405, ratchet part; 406, ratchet groove; 4061, magnet; 407, ratchet pawl; 4071, fillet; 5, trigger member; 501, elastic expansion ring; 502, filter screen; 503, flexible magnetic sheet. DETAILED DESCRIPTION

[0035] The present invention provides a dual-duct industrial bag dust collector, and the technical solution is as follows:

[0036] See also Figures 1 to 8 A dual-duct industrial bag dust collector includes a dust collector body, a flower plate 101, a bag 102 and a bag cage 103. The flower plate 101 is installed in the dust collector body. The bag openings of multiple bags 102 are installed on the flower plate 101 in an array. The bag cage 103 is installed in the bag 102 and extends to the upper end surface of the flower plate 101. Specifically, the opening of the bag cage 103 is set as an air guide hole 2, gaskets 3 are provided on both sides of the bag cage 103, and a cover plate assembly 4 is provided on the gasket 3. The cover plate assembly 4 includes a gasket fixed on the gasket 3, the two clamping blocks 403 are slidably installed between the fixed circular plates 402, a gap 4031 is provided between the two clamping blocks 403, the width of the gap 4031 is the same as the diameter of the air guide hole 2, and a trigger 5 is also provided at the opening of the bag cage 103. After the cloth bag 102 is damaged, smoke particles gather on the trigger 5, so that the trigger 5 bulges upward due to the increase in pressure in the cloth bag 102, so that the clamping block 403 closes the gap 4031 through elastic force, thereby closing the air guide hole 2.

[0037] See also Figures 1 to 8The cover plate assembly 4 also includes a movable circular plate 401, a spring 404 and a ratchet groove 406. The movable circular plate 401 is provided with a waist-shaped guide groove 4011. The clamping block 403 is connected to the guide groove 4011 through a convex circle 4022. One end of the guide groove 4011 is located on the center line of the outer edge of the movable circular plate 401, and the other end extends to the center line of the inner edge of the movable circular plate 401. The number of the guide grooves 4011 is the same as that of the clamping block 403 and is symmetrical along the center line of the movable circular plate 401. A U-shaped sealing strip 4033 is also provided on one side of the clamping block 403, and a U-shaped groove 4034 matching the U-shaped sealing strip 4033 is provided on the opposite clamping block 403. The U-shaped sealing strip 4033 and the U-shaped groove 4034 are interference fit. The clamping block 4 A clamping portion 4032 is also provided between the contact surface of the clamping block 403 and the fixed circular plate 402. The clamping portion 4032 is in a square shape. The clamping portion 4032 of the clamping block 403 is complementary to the clamping portion 4032 of the opposite fixed circular plate 402. One end of the spring 404 is connected to the movable circular plate 401, and the other end is connected to the fixed circular plate 402. The initial state of the spring 404 is a stretched state. A ratchet portion 405 is also provided on the outer edge of the movable circular plate 401. A ratchet groove 406 is provided on one side of the ratchet portion 405 and is connected to the fixed circular plate 402. A pawl 407 is provided in the ratchet groove 406. The pawl 407 is respectively in contact with the ratchet portion 405 and the trigger member 5. A rounded corner 4062 is provided on the upper half of the ratchet portion 405 and the lower half of the pawl 407.

[0038] See also Figures 1 to 3 , Figure 5 , Figure 6 and Figure 8 The trigger member 5 includes an elastic expansion ring 501 and a filter 502. The pore size of the filter 502 is 5 μm. The elastic expansion ring 501 is arranged on the outer edge of the filter 502 and cooperates with the opening structure of the bag cage 103. The filter 502 abuts against the ratchet 407. A flexible magnetic sheet 503 that matches the shape of the filter 502 is also provided on the edge of the filter 502. A magnet 4061 that magnetically repels the flexible magnetic sheet 503 is also provided on the lower end surface of the ratchet groove 406. The filter 502 is in a semicircular arc shape that is recessed toward the bottom of the cloth bag 102.

[0039] See also Figures 1 to 8Due to the damage of the bag 102, the unpurified smoke is discharged to the outside from the air guide hole 2. By installing a clamp 403 and a filter 502 at the opening of each bag 102, the wind resistance of the high-pressure cleaning gas is increased due to the setting of the filter 502, and the air circulation efficiency will inevitably decrease. The semi-circular filter 502 design can better cover the entire air guide hole 2, and its streamlined shape can reduce wind resistance, making the air circulation smoother, thereby more effectively capturing and filtering tiny particles in the air. By installing a flexible magnetic sheet 503 on the edge of the filter 502, the flexible magnetic sheet 50 3, the hardness and quality of the filter screen 502 can ensure that the filter screen 502 will not be deformed upward due to the airflow flowing to the outside in daily use, thereby preventing accidental touch. By twisting the movable circular plate 401 clockwise, due to the sliding connection between the guide groove 4011 on the movable circular plate 401 and the convex circle 4022 on the clamping block 403, the two form a crank slider mechanism. The movable circular plate 401 resists the pulling force of the spring 404 and drives the clamping block 403 to move along the fixed circular plate 402 in the direction away from the air guide hole 2 until the convex circle 4022 moves to the end of the guide groove 4011. By A clamping portion 4032 is provided between the two clamping blocks 403, thereby limiting the freedom of the clamping blocks 403 to swing up and down, thereby ensuring that the two clamping blocks 403 are parallel when closed, thereby ensuring that the unpurified flue gas cannot leak from between the belt cage and the clamping blocks 403 and the gap 4031. In order to avoid that the cover plate assembly 4 is exposed to the flue gas for a long time, so that particulate matter in the flue gas is partially accumulated in the matching gap 4031 of the parts, resulting in incomplete closure of the two clamping blocks 403 when the spring 404 contracts, and the impact of the high-pressure air of the cleaning on the two closed clamping blocks 403, thereby causing the gap 4031 to expand, resulting in unpurified Smoke leakage is prevented by arranging a U-shaped sealing strip 4033 and a matching U-shaped groove 4034 between the contact surfaces of the two clamping blocks 403. The mutual cooperation between the two avoids the generation of a gap 4031 after the clamping blocks 403 are closed, and the elastic force of the spring 404 realizes an interference fit between the two, thereby avoiding the generation of the gap 4031 when the high-pressure air impacts, thereby ensuring the sealing of the clamping blocks 403 to the smoke. When the staff no longer applies force to the movable circular plate 401, the ratchet part 405 is stopped by the pawl 407, so that the movable circular plate 401 cannot rotate, and the clamping blocks 403 complete the arrangement of setting the initial state;When the bag 102 is damaged, since the diameter of the particles in the smoke filtered by the bag 102 is between 5μm and 100μm, the unpurified smoke enters from the damaged part and flows to the air guide hole 2. By installing a filter 502 at the opening of the bag cage 103 in the same way as the bag 102, since the pore size of the filter 502 is 5μm, the particles in the smoke are blocked by the filter 502, and the particles on it continue to increase, causing the filter 502 to be quickly blocked. As the smoke passes through the bag 102 is further increased, the filter screen 502 is deformed and bulged outward from the air guide hole 2 due to the pressure, and the lower end surface of the ratchet groove 406 is provided with a magnet 4061 that magnetically repels the flexible magnetic sheet 503. The filter screen 502 only needs to be slightly deformed upward to bulge, so that the ratchet groove 406 moves upward under the magnetic force, and the ratchet 407 cannot lock the movable circular plate 401, and then the ratchet groove 406 is pushed out of the ratchet wheel part 405. Since the ratchet 407 and the ratchet wheel part 405 are no longer in contact, the movable circular plate 401 cannot resist the spring 404. The elastic force rotates and drives the two clamping blocks 403 to close and seal the damaged cloth bag 102, thereby preventing smoke leakage. Due to the triggering of the filter 502, the maintenance personnel can quickly find the cloth bag 102 that needs maintenance, which improves the inspection accuracy and reduces the workload. Since the closing of the clamping block 403 is controlled by the repulsive magnetism, although the contraction speed of the spring 404 is 0.3 milliseconds, as the gap 4031 of the clamping block 403 decreases, the repulsive magnetism decreases, and the The height of the groove 406 will also decrease, so that the pawl 407 will abut against the ratchet part 405 again, causing the clamping block 403 to be unable to be completely closed. By setting the rounded corner 4071, during the contact between the rounded corners 4071 of the two, the rounded corners 4071 on the ratchet part 405 and the pawl 407 will bounce off after contact due to the elastic force of the spring 404, thereby ensuring that the ratchet part 405 and the pawl 407 will not abut against each other during the contraction of the spring 404, thereby ensuring that the air guide hole 2 can be smoothly closed. ;

[0040] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A dual-duct industrial bag dust collector, comprising a dust collector body, a flower plate (101), a bag (102) and a bag cage (103), wherein the flower plate (101) is installed in the dust collector body, a plurality of bag openings of the bag (102) are installed in an array on the flower plate (101), and the bag cage (103) is installed in the bag (102) and extends to the upper end surface of the flower plate (101), characterized in that: The opening of the bag cage (103) is set as an air guide hole (2), gaskets (3) are provided on both sides of the bag cage (103), a cover plate assembly (4) is provided on the gasket (3), the cover plate assembly (4) comprises a fixed circular plate (402) and a clamping block (403) fixed on the gasket (3), two clamping blocks (403) are slidably installed between the fixed circular plates (402), a gap (4031) is provided between the two clamping blocks (403), the width of the gap (4031) is the same as the diameter of the air guide hole (2), and a trigger member (5) is also provided at the opening of the bag cage (103), and when the internal pressure of the cloth bag (102) reaches a set value, the trigger member (5) triggers the cover plate assembly (4) to drive the clamping blocks (403) on both sides to fit together.

2. A dual-duct industrial bag dust collector according to claim 1, characterized in that: The cover plate assembly (4) further comprises a movable circular plate (401), a spring (404) and a ratchet groove (406); a waist-shaped guide groove (4011) is provided on the movable circular plate (401); the clamping block (403) is connected to the guide groove (4011) via a convex circle (4022); one end of the guide groove (4011) is located on the center line of the outer edge of the movable circular plate (401), and the other end extends to the center line of the inner edge of the movable circular plate (401); the number of the guide grooves (4011) is the same as that of the clamping block (403) and is arranged along the movable circular plate (401). 1), one end of the spring (404) is connected to the movable circular plate (401), and the other end is connected to the fixed circular plate (402), the initial state of the spring (404) is a stretched state, a ratchet portion (405) is further provided on the inner edge of the movable circular plate (401), a ratchet groove (406) is provided on one side of the ratchet portion (405) and is connected to the fixed circular plate (402), a ratchet pawl (407) is provided in the ratchet groove (406), and the ratchet pawl (407) is respectively in contact with the ratchet portion (405) and the trigger member (5).

3. A dual-duct industrial bag dust collector according to claim 2, characterized in that: The trigger member (5) comprises an elastic expansion ring (501) and a filter (502); the pore size of the filter (502) is 4 to 5 μm; the elastic expansion ring (501) is arranged at the outer edge of the filter (502) and cooperates with the opening structure of the bag cage (103); the filter (502) abuts against the ratchet (407).

4. A dual-duct industrial bag dust collector according to claim 2, characterized in that: A clamping portion (4032) is also provided between the contact surfaces of the clamping block (403) and the fixed circular plate (402); the clamping portion (4032) is in a square shape; the clamping portion (4032) of the clamping block (403) is complementary to the clamping portion (4032) of the fixed circular plate (402).

5. A dual-duct industrial bag dust collector according to claim 2, characterized in that: A U-shaped sealing strip (4033) is also provided on the clamping block (403) on one side, and a U-shaped groove (4034) matching the U-shaped sealing strip (4033) is provided on the clamping block (403) on the opposite side, and the U-shaped sealing strip (4033) and the U-shaped groove (4034) are interference fit.

6. A dual-duct industrial bag dust collector according to claim 3, characterized in that: A flexible magnetic sheet (503) matching the shape of the filter screen (502) is also provided inside the edge of the filter screen (502), and a magnet (4061) magnetically repelling the flexible magnetic sheet (503) is also provided on the lower end surface of the ratchet groove (406).

7. A dual-duct industrial bag dust collector according to claim 6, characterized in that: The upper part of the ratchet portion (405) and the lower part of the pawl (407) are both provided with rounded corners (4062).

8. The dual-duct industrial bag dust collector according to claim 2, characterized in that: The filter screen (502) is in a semicircular arc shape that is recessed toward the bottom of the cloth bag (102).

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