Bag cage of bag type dust collector and bag type dust collector thereof

Abstract

The invention relates to the technical field of bag type dust collectors, in particular to a bag cage of a bag type dust collector and the bag type dust collector thereof.The bag cage of the bag type dust collector comprises an air inlet disc opening, a connecting ring fixedly connected to the bottom of the air inlet disc opening and a cloth bag installed on the connecting ring and further comprises a straightening assembly fixedly connected to the bottom of the connecting ring; according to the cloth bag straightening device, the process that the bottom of a cloth bag shrinks upwards can be completed when the cloth bag is subjected to blowing force, the situation that the bottom of the cloth bag is subjected to excessive stress and consequently the cloth bag is abraded and broken is effectively prevented, and when airflow reaches the bottommost part of the straightening assembly, the cloth bag is driven by the straightening assembly to be straightened, so that the cloth bag is straightened, and the cloth bag is prevented from being damaged. Therefore, the cloth bag generates shaking force to effectively promote falling of dust on the cloth bag, the cleaning time of the pulse gas on the cloth bag is shortened, and the efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of bag dust collectors, in particular to a bag cage of a bag dust collector and a bag dust collector thereof. Background Art

[0002] In the bag filter, the working principle of the pulse bag filter is to intercept the dust particles in the dust-laden gas through the dust bag, and to spray and clean the filter bag through the pulse valve to regenerate the filter bag and restore the filtering capacity. After the dust-laden gas enters the dust collector body through the air inlet, the larger dust particles naturally settle under the action of gravity, while the smaller dust particles are adsorbed on the outer surface of the filter bag. As the filtering process continues, the dust adsorbed on the surface of the filter bag continues to increase, causing the resistance of the filter bag to gradually increase. When the resistance reaches a certain value, the control system will issue a command to start the pulse valve. After the pulse valve is opened, compressed air is instantly sprayed into the filter bag, blowing off the dust particles attached to the surface of the filter bag, so that the filter bag is regenerated.

[0003] Since pulse gas has a strong impact force, the bag will expand when the pulse gas is sprayed to clean it. The traditional bag cage is a fixed bag cage. When the bag expands, it will drive the bottom of the bag to shrink toward the middle, causing friction between the bottom of the bag and the bag cage. Over time, the bag will cause wear and tear, affecting its use and life. When the amount of dust is too large, it will take more time to clean the bag with pulse gas, which will affect the filtration efficiency of the bag.

[0004] Therefore, a bag cage of a bag dust collector and a bag dust collector thereof are proposed. Summary of the invention

[0005] The object of the present invention is to provide a bag cage of a bag dust collector and a bag dust collector thereof, which solves the problem that the traditional bag cage is a fixed bag cage, when the strong gas blows the bag to expand, the bottom of the bag will be driven to shrink toward the middle, thereby causing the bag to be subjected to excessive deformation force and cause wear and rupture, and when the amount of dust is too large, it takes more time to clean the bag when the pulse gas is used to clean it, which will affect the filtering efficiency of the bag. The present invention can enable the bag to complete a buffering process of upward contraction of the bottom of the bag when it is impacted by a strong airflow, thereby preventing the bag from being damaged by the deformation force of the strong airflow and extending the service life of the bag, and when the airflow reaches the bottom of the bag cage, it will push the bag to be straightened, and the rapid straightening of the bag cage can shake off the dust on the bag cage, thereby promoting the effect of cleaning the dust on the bag cage.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] On the one hand, the present application provides a bag cage of a bag dust collector, comprising an air inlet disc, a connecting ring fixedly connected to the bottom of the air inlet disc, and a cloth bag installed on the connecting ring, and also comprising a straightening component fixedly connected to the bottom of the connecting ring, and a buffer component fixedly connected to the bottom of the straightening component; the air inlet disc is provided with a sealing groove, the connecting ring is provided with a mounting groove, the cloth bag is fixedly connected with a mounting ring, and the bottom of the cloth bag is provided with a bottom opening; the cloth bag is connected to the mounting groove on the connecting ring through the mounting ring, and the cloth bag is sleeved on the outside of the straightening component and the buffer component; the buffer component can seal and fix the bottom opening of the bottom of the cloth bag, and the buffer component can cause the bottom of the cloth bag to contract and release force when the cloth bag is blown by gas; the straightening component can straighten the cloth bag after the gas blows on the cloth bag, so as to shake off the dust on the cloth bag.

[0008] Preferably, the straightening assembly includes a fixed cage fixedly connected to the bottom of the connecting ring, a blocking ring fixedly connected to the fixed cage, a telescopic cage slidably connected to the bottom of the fixed cage, an elastic member 1 fixedly installed between the fixed cage and the telescopic cage, and a chassis fixedly connected to the bottom of the telescopic cage; when the gas enters the cloth bag and reaches the chassis, the resistance of the chassis will push the telescopic cage to move downward, thereby stretching the cloth bag, and the straightened cloth bag will generate a shaking force on the dust on the cloth bag, thereby accelerating the dust cleaning effect, and when the gas stops blowing, the telescopic cage will be retracted by the pulling force of the elastic member 1.

[0009] Preferably, the straightening assembly also includes resistance plate 1, resistance plate 2 and resistance plate 3 fixedly connected to the telescopic cage; the inner diameters of resistance plate 1, resistance plate 2 and resistance plate 3 successively become smaller, and when the gas passes through resistance plate 1, resistance plate 2 and resistance plate 3, the resistance encountered will become greater and greater, which can promote the telescopic cage to move downward, and the resistance plates can also disperse the passing gas to further enhance the cleaning effect of the gas on the surrounding bags.

[0010] Preferably, after the telescopic cage is moved downward by the thrust of the gas, it will be pulled back by the elastic member to abut and collide with the blocking ring, which can generate vibration between the telescopic cage and the fixed cage, thereby effectively enhancing the dust cleaning effect.

[0011] Preferably, the buffer assembly includes a connecting column fixedly connected to the bottom of the chassis, a sliding groove provided on the connecting column, a threaded tube slidably connected to the outside of the connecting column, a disc fixedly connected to the threaded tube, an elastic member 2 fixedly installed between the disc and the chassis, and a nut threadedly connected to the outside of the threaded tube; the bottom of the cloth bag can be clamped and fixed between the nut and the disc, and when blown by gas, the cloth bag can drive the disc to overcome the elastic force of the elastic member 2 and move upward, thereby completing the force release action, thereby effectively preventing the strong impact of the airflow on the cloth bag from damaging the cloth bag.

[0012] Preferably, the diameter of the disc is smaller than the diameter of the bottom of the bag, so that the disc can avoid abrasion of the stitching connection at the bottom of the bag when the bag is inflated.

[0013] On the other hand, the present application also provides a bag dust collector, including a box body, a gas cylinder fixedly connected to the outside of the box body, a pulse valve fixedly connected to the gas cylinder, a mounting plate fixedly connected to the inside of the box body, a plurality of mounting ports opened on the mounting plate, a pulse nozzle fixedly connected to the pulse valve, and a fixing member fixedly connected to the mounting port; the gas in the gas cylinder passes through the pulse valve and is finally ejected from the pulse nozzle into the bag; the air inlet disc is cooperatively connected with the fixing member, and when the air inlet disc is connected to the fixing member, the fixing member will push the mounting ring on the bag and the connecting ring to be tightened, thereby ensuring the sealing between the bag and the connecting ring.

[0014] Preferably, the fixing member includes a support ring fixedly connected to the mounting port, a fixing ring fixedly connected to the support ring, a sealing ring fixedly connected to the fixing ring, an extrusion block slidably connected to the fixing ring, and a slope surface arranged on the outside of the extrusion block; when the sealing groove on the air inlet disc is sleeved outside the sealing ring, the sealing groove will push the extrusion block to squeeze the mounting ring on the cloth bag.

[0015] Preferably, there are two groups of extrusion blocks in total, and the two groups of extrusion blocks are symmetrically installed on the fixing ring with the center point of the fixing ring as the center.

[0016] Preferably, the sealing ring is made of rubber, and the sealing ring fits in the sealing groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The existing bag cage is a fixed bag cage and cannot play a buffering role when the bag is subjected to a strong impact. When the bag is cleaned by the pulse gas, the gas will first pass through the middle of the bag and impact the middle of the bag. By setting a buffer component, the bag can be contracted and bulged, which can relieve the force on the bag and effectively prevent the bag from being damaged by the strong impact of the airflow. When the airflow reaches the bottom of the bag, the airflow will push the straightening component, the buffer component and the bottom of the bag to move downward at the same time under the action of the straightening component. At this time, the bag will be stretched straight and shaken, which can shake off the dust on the bag, improve the cleaning efficiency of the bag, and effectively enhance the dust cleaning effect.

[0019] 2. When the airflow reaches the bottom of the bag and straightens the bag, the elastic member 2 can prevent the bag from being damaged during the rapid straightening process. When the airflow ends, the elastic member 1 will pull the telescopic cage back to its original position and collide with the blocking ring, causing the bag to vibrate additionally, which can promote the rapid falling of dust from the bag.

[0020] 3. Pass the bag cage as a whole through the installation port, and then press down on the air inlet plate to move the sealing groove extrusion block toward the center of the bag, thereby strengthening the fastening effect on the bag and preventing the bag from detaching from the connecting ring and falling when subjected to the force of gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the straightening component and the buffer component of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the air intake plate of the present invention when viewed from above;

[0024] Figure 4 It is a schematic diagram of the enlarged structure of the straightening assembly of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the buffer assembly of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the mounting plate of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the fixing member of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the matching use of the fixing member and the air inlet disc of the present invention.

[0029] In the figure: 1. air inlet disc; 11. sealing groove; 2. connecting ring; 21. mounting groove; 3. cloth bag; 31. mounting ring; 32. bottom mouth; 4. straightening assembly; 41. fixed cage; 42. blocking ring; 43. telescopic cage; 44. elastic part 1; 45. chassis; 46. resistance plate 1; 47. resistance plate 2; 48. resistance plate 3; 5. buffer assembly; 51. connecting column; 52. slide groove; 53. threaded pipe; 54. disc; 55. elastic part 2; 56. nut; 6. box; 61. gas cylinder; 62. pulse valve; 7. mounting plate; 71. mounting port; 8. pulse nozzle; 9. fixing piece; 91. support ring; 92. fixing ring; 93. sealing ring; 94. extrusion block; 95. slope surface. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] Reference Figure 1-7 , which is the first embodiment of the present invention, and provides a bag cage of a bag-type dust collector, which can extend the service life of the bag 3 and enhance the cleaning effect of the bag 3, and comprises: an air inlet disc 1, a connecting ring 2 fixedly connected to the bottom of the air inlet disc 1, and a bag 3 installed on the connecting ring 2, and also comprises a straightening component 4 fixedly connected to the bottom of the connecting ring 2, and a buffer component 5 fixedly connected to the bottom of the straightening component 4; a sealing groove 11 is provided on the air inlet disc 1, a mounting groove 21 is provided on the connecting ring 2, a mounting ring 31 is fixedly connected to the bag 3, and a bottom opening 32 is provided at the bottom of the bag 3; the bag 3 passes through The mounting ring 31 is connected to the mounting groove 21 on the connecting ring 2, and the cloth bag 3 is sleeved on the outside of the straightening component 4 and the buffer component 5; the buffer component 5 can seal and fix the bottom opening 32 of the bottom of the cloth bag 3, and the buffer component 5 can shrink and release the force at the bottom of the cloth bag 3 when the cloth bag 3 is blown by gas; the straightening component 4 can straighten the cloth bag 3 after the gas blows on the cloth bag 3, and shake off the dust on the cloth bag 3; when installing the cloth bag 3, the bottom of the cloth bag 3 can be fixed on the buffer component 5, and then the mounting ring 31 on the top of the cloth bag 3 can be connected to the mounting groove 21 on the connecting ring 2 to complete the installation of the cloth bag 3.

[0033] During use, when the airflow enters the cloth bag 3 to clean the cloth bag 3, the strong airflow will first drive the middle part of the cloth bag 3 to bulge, and under the action of the buffer component 5, the cloth bag 3 can complete the process of shrinking upward from the bottom of the cloth bag 3 when it is blown, effectively preventing the bottom of the cloth bag 3 from being subjected to excessive stress and causing wear and rupture, and when the airflow reaches the bottom of the straightening component 4, it will drive the cloth bag 3 to be straightened through the straightening component 4, so that the cloth bag 3 generates a shaking force, which can effectively promote the falling of dust on the cloth bag 3, reduce the cleaning time of the pulse gas on the cloth bag 3, and improve efficiency.

[0034] Example 2

[0035] Reference Figure 2-5 , which is the second embodiment of the present invention, and is different from the first embodiment in that it also includes a straightening component 4 and a buffer component 5. In the previous embodiment, a bag cage of a bag dust collector includes an air inlet disc 1, a connecting ring 2 fixedly connected to the bottom of the air inlet disc 1, and a cloth bag 3 installed on the connecting ring 2, and also includes a straightening component 4 fixedly connected to the bottom of the connecting ring 2, and a buffer component 5 fixedly connected to the bottom of the straightening component 4.

[0036] Furthermore, the straightening assembly 4 includes a fixed cage 41 fixedly connected to the bottom of the connecting ring 2, a blocking ring 42 fixedly connected to the fixed cage 41, a telescopic cage 43 slidably connected to the bottom of the fixed cage 41, an elastic member 44 fixedly installed between the fixed cage 41 and the telescopic cage 43, and a chassis 45 fixedly connected to the bottom of the telescopic cage 43; when the gas enters the cloth bag 3 and reaches the chassis 45, the resistance of the chassis 45 will push the telescopic cage 43 to move downward, thereby stretching the cloth bag 3, and the straightened cloth bag 3 will generate a shaking force on the dust on the cloth bag 3, thereby accelerating the dust cleaning effect, and when the gas stops blowing, the telescopic cage 43 will be retracted by the pulling force of the elastic member 44.

[0037] Furthermore, the straightening component 4 also includes a resistance plate 1 46, a resistance plate 2 47 and a resistance plate 3 48 fixedly connected to the telescopic cage 43; the inner diameters of the resistance plate 1 46, the resistance plate 2 47 and the resistance plate 3 48 successively become smaller, and when the gas passes through the resistance plate 1 46, the resistance plate 2 47 and the resistance plate 3 48, the resistance encountered will become greater and greater, so the telescopic cage 43 will be thrust by the gas to promote the telescopic cage 43 to move downward, and the resistance plates can also disperse the passing gas to further enhance the cleaning effect of the gas on the surrounding cloth bags 3.

[0038] The telescopic cage 43 moves downward under the thrust of the gas and is pulled back by the elastic member 44, and then collides with the blocking ring 42, thereby generating vibration between the telescopic cage 43 and the fixed cage 41, thereby effectively enhancing the cleaning effect of dust.

[0039] Furthermore, the buffer assembly 5 includes a connecting column 51 fixedly connected to the bottom of the chassis 45, a slide groove 52 opened on the connecting column 51, a threaded tube 53 slidably connected to the outside of the connecting column 51, a disc 54 fixedly connected to the threaded tube 53, an elastic member 2 55 fixedly installed between the disc 54 and the chassis 45, and a nut 56 threadedly connected to the outside of the threaded tube 53; when installing the cloth bag 3, the bottom opening 32 of the bottom of the cloth bag 3 can be passed through the connecting column 51 first, at this time, the bottom of the cloth bag 3 will be located at the bottom of the disc 54, and then the nut 56 can be screwed to clamp the cloth bag 3 between the nut 56 and the disc 54, and then the top of the cloth bag 3 is installed at the connecting ring 2 to complete the installation of the cloth bag 3. When the cloth bag 3 is blown by gas, the middle part of the cloth bag 3 will swell, and the bottom of the cloth bag 3 will drive the disc 54 to overcome the elastic force of the elastic member 2 55 and move upward, thereby completing the force release action, effectively preventing the strong impact of the airflow on the cloth bag 3 from damaging the cloth bag 3.

[0040] The diameter of the disc 54 is smaller than the diameter of the bottom of the bag 3 , which is different from the traditional bag cage. When the bag 3 is inflated, the disc 54 can avoid wear on the seam connection at the bottom of the bag 3 .

[0041] When in use, when installing the cloth bag 3, the bottom opening 32 of the bottom of the cloth bag 3 can be passed through the connecting column 51 first. At this time, the bottom of the cloth bag 3 will be located at the bottom of the disc 54, and then the nut 56 can be screwed to clamp the cloth bag 3 between the nut 56 and the disc 54, and then the top of the cloth bag 3 is installed on the connecting ring 2 to complete the installation of the cloth bag 3. When the cloth bag 3 is blown by the gas, the gas will first pass through the middle of the cloth bag 3 to inflate the cloth bag 3. At this time, the bottom of the cloth bag 3 will drive the disc 54 to overcome the elastic force of the elastic member 2 55 and move upward, thereby completing the force release action, effectively preventing the strong impact of the airflow on the cloth bag 3 and causing the cloth bag to be 3 is damaged. When the gas reaches the bottom plate 45, the resistance of the bottom plate 45 will push the telescopic cage 43 to move downward, so that the cloth bag 3 is stretched and straightened. The straightened cloth bag 3 will generate a shaking force on the dust on the cloth bag 3, thereby accelerating the dust cleaning effect. When the gas stops blowing, the telescopic cage 43 will be retracted by the pulling force of the elastic member 44. After being moved downward by the thrust of the gas and pulled back by the elastic member 44, the telescopic cage 43 will abut and collide with the blocking ring 42, thereby generating vibration between the telescopic cage 43 and the fixed cage 41, thereby effectively enhancing the dust cleaning effect.

[0042] Example 3

[0043] Reference Figure 6-8 as well as Figure 1 , which is the third embodiment of the present invention, and is different from the previous two embodiments in that: a bag dust collector includes a box body 6, a gas cylinder 61 fixedly connected to the outside of the box body 6, a pulse valve 62 fixedly connected to the gas cylinder 61, a mounting plate 7 fixedly connected to the inside of the box body 6, a plurality of mounting ports 71 provided on the mounting plate 7, a pulse nozzle 8 fixedly connected to the pulse valve 62, and a fixing member 9 fixedly connected to the mounting port 71; the gas in the gas cylinder 61 passes through the pulse valve 62 and is finally ejected from the pulse nozzle 8 into the cloth bag 3; the air inlet disc 1 is connected with the fixing member 9, and when the air inlet disc 1 is connected to the fixing member 9, the fixing member 9 will push the mounting ring 31 on the cloth bag 3 to be fastened with the connecting ring 2, thereby ensuring the sealing between the cloth bag 3 and the connecting ring 2.

[0044] Furthermore, the fixing member 9 includes a support ring 91 fixedly connected to the mounting port 71, a fixing ring 92 fixedly connected to the support ring 91, a sealing ring 93 fixedly connected to the fixing ring 92, an extrusion block 94 slidably connected to the fixing ring 92, and a slope surface 95 arranged on the outside of the extrusion block 94; when the sealing groove 11 on the air inlet disc 1 is sleeved outside the sealing ring 93, the sealing groove 11 will push the extrusion block 94 to extrude the mounting ring 31 on the cloth bag 3.

[0045] There are two groups of extrusion blocks 94 in total, and the two groups of extrusion blocks 94 are symmetrically installed on the fixing ring 92 with the center point of the fixing ring 92 as the center.

[0046] The sealing ring 93 is made of rubber, and the sealing ring 93 fits the sealing groove 11 .

[0047] When in use, after the cloth bag 3 is installed with the air inlet disc 1 and the bottom of the cloth bag 3 is clamped and fixed, the bag cage can be passed through the installation port 71 as a whole, and then the sealing groove 11 on the air inlet disc 1 is placed on the sealing ring 93, and then the air inlet disc 1 is pressed downward to make the sealing groove 11 squeeze the extrusion block 94 to move toward the center of the cloth bag 3, thereby tightening the cloth bag 3.

[0048] Working principle: When the cloth bag 3 needs to be cleaned after working for a long time, the pulse valve 62 will be started. At this time, the gas in the gas cylinder 61 will pass through the pulse valve 62 and finally be sprayed out from the pulse nozzle 8 into the cloth bag 3. When the gas enters the cloth bag 3, it will finally reach the disc 54 from the top of the cloth bag 3.

[0049] When installing the cloth bag 3, the bottom opening 32 of the cloth bag 3 can be passed through the connecting column 51 first. At this time, the bottom of the cloth bag 3 will be located at the bottom of the disc 54, and then the nut 56 can be screwed to clamp the cloth bag 3 between the nut 56 and the disc 54. Then, the top of the cloth bag 3 is installed on the connecting ring 2 to complete the installation of the cloth bag 3.

[0050] After the cloth bag 3 is installed with the air inlet disc 1 and the bottom of the cloth bag 3 is clamped and fixed, the bag cage can be passed through the installation port 71 as a whole, and then the sealing groove 11 on the air inlet disc 1 is sleeved on the sealing ring 93, and then the air inlet disc 1 is pressed downward to make the sealing groove 11 squeeze the extrusion block 94 to move toward the center of the cloth bag 3, thereby tightening the cloth bag 3.

[0051] When the bag 3 is blown by the gas, the gas will first pass through the middle of the bag 3 to inflate the bag 3. At this time, the bottom of the bag 3 will drive the disk 54 to move upward to overcome the elastic force of the elastic member 2 55, thereby completing the force release action, effectively preventing the strong impact of the airflow on the bag 3 and damaging the bag 3.

[0052] When the gas reaches the chassis 45, the resistance of the chassis 45 will push the telescopic cage 43 to move downward, thereby stretching the cloth bag 3 and straightening it. The stretched cloth bag 3 will generate a shaking force on the dust on the cloth bag 3, thereby accelerating the dust cleaning effect. When the gas stops blowing, the telescopic cage 43 will be retracted by the pulling force of the elastic member 44. After being moved downward by the thrust of the gas and pulled back by the elastic member 44, the telescopic cage 43 will abut and collide with the blocking ring 42, thereby generating vibration between the telescopic cage 43 and the fixed cage 41, thereby effectively enhancing the dust cleaning effect.

[0053] Even though we have provided specific embodiments of the present invention, it should be clear to those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without violating the fundamental concept and purpose of the present invention. The scope of the present invention is not fixed, but is ultimately determined by the claims contained in the patent document and the equivalent technical solutions. In short, the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A bag cage of a bag filter, comprising an air inlet disc (1), a connecting ring (2) fixedly connected to the bottom of the air inlet disc (1), and a bag (3) mounted on the connecting ring (2), characterized in that: The invention also comprises a straightening component (4) fixedly connected to the bottom of the connecting ring (2), and a buffer component (5) fixedly connected to the bottom of the straightening component (4); a sealing groove (11) is provided on the air inlet disc (1), a mounting groove (21) is provided on the connecting ring (2), a mounting ring (31) is fixedly connected to the cloth bag (3), and a bottom opening (32) is provided at the bottom of the cloth bag (3); the cloth bag (3) is connected to the mounting groove (21) on the connecting ring (2) through the mounting ring (31), and the cloth bag (3) is sleeved on the outside of the straightening component (4) and the buffer component (5); the buffer component (5) contracts and releases the force on the cloth bag (3); the straightening component (4) can straighten the cloth bag (3) after the gas blows the cloth bag (3).

2. The bag cage of a bag type dust collector according to claim 1, characterized in that: The straightening assembly (4) comprises a fixed cage (41) fixedly connected to the bottom of the connecting ring (2), a blocking ring (42) fixedly connected to the fixed cage (41), a telescopic cage (43) slidably connected to the bottom of the fixed cage (41), an elastic member (44) fixedly installed between the fixed cage (41) and the telescopic cage (43), and a chassis (45) fixedly connected to the bottom of the telescopic cage (43).

3. The bag cage of a bag type dust collector according to claim 2, characterized in that: The straightening assembly (4) further comprises a resistance plate 1 (46), a resistance plate 2 (47) and a resistance plate 3 (48) fixedly connected to the telescopic cage (43); the inner diameters of the resistance plate 1 (46), the resistance plate 2 (47) and the resistance plate 3 (48) become smaller in sequence.

4. The bag cage of a bag type dust collector according to claim 3, characterized in that: The telescopic cage (43) is in the shape of a ring, and the outer arc of the telescopic cage (43) matches the cloth bag (3).

5. The bag cage of a bag type dust collector according to claim 4, characterized in that: The buffer assembly (5) comprises a connecting column (51) fixedly connected to the bottom of the chassis (45), a sliding groove (52) provided on the connecting column (51), a threaded tube (53) slidably connected to the outside of the connecting column (51), a disc (54) fixedly connected to the threaded tube (53), an elastic member (55) fixedly installed between the disc (54) and the chassis (45), and a nut (56) threadedly connected to the outside of the threaded tube (53); the bottom of the cloth bag (3) is clamped and fixed between the nut (56) and the disc (54).

6. The bag cage of a bag type dust collector according to claim 5, characterized in that: The diameter of the disc (54) is smaller than the diameter of the bottom of the cloth bag (3).

7. A bag dust collector, comprising a bag cage of a bag dust collector according to any one of claims 1 to 6, characterized in that: The invention comprises a box body (6), a gas cylinder (61) fixedly connected to the outside of the box body (6), a pulse valve (62) fixedly connected to the gas cylinder (61), a mounting plate (7) fixedly connected to the inside of the box body (6), a plurality of mounting ports (71) provided on the mounting plate (7), a pulse nozzle (8) fixedly connected to the pulse valve (62), and a fixing member (9) fixedly connected to the mounting port (71); the fixing member (9) is used for fastening the cloth bag (3).

8. The bag filter according to claim 7, characterized in that: The fixing member (9) comprises a support ring (91) fixedly connected to the mounting opening (71), a fixing ring (92) fixedly connected to the support ring (91), a sealing ring (93) fixedly connected to the fixing ring (92), an extrusion block (94) slidably connected to the fixing ring (92), and a slope surface (95) arranged on the outside of the extrusion block (94).

9. The bag filter according to claim 8, characterized in that: There are two groups of extrusion blocks (94) in total, and the two groups of extrusion blocks (94) are symmetrically mounted on the fixing ring (92) with the center point of the fixing ring (92) as the center.

10. The bag filter according to claim 9, characterized in that: The sealing ring (93) is made of rubber material, and the sealing ring (93) fits in with the sealing groove (11).

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