Pulse back blow pipe for preventing damage of dust collecting filter bag

Abstract

The utility model belongs to pulse back blow dust removal technical field especially prevents the pulse back blow pipeline of dust collecting filter bag damage, including the box body that is internally provided with the mounting flower board and filter bag and is used for the back blow assembly of dust removal to filter bag, the outer edge of mounting through -hole swing joint has the slide bar that top extends to the above of mounting flower board, the top of slide rod is fixedly connected with the snap ring, the part of spring is covered in between the upper surface of mounting flower board and the lower surface of snap ring of slide rod, the top position of filter bag is provided with the snap groove cooperation with snap ring, through setting up mounting through -hole on the mounting flower board, and swing joint top extends to the slide bar above mounting flower board, has realized the stable installation of filter bag, has guaranteed the stability of filter bag in the dust removal process, effectively prevented the filter bag damage caused by air flow impact or vibration, and the spring covered between slide rod and mounting flower board can play the buffering effect when filter bag is subjected to pulse back blow, further protected filter bag from damage.

Description

Technical Field

[0001] This utility model belongs to the field of pulse backflushing dust removal technology, specifically relating to a pulse backflushing pipe for preventing damage to dust collection filter bags. Background Technology

[0002] Pulse-jet baghouse dust collectors are highly efficient dry dust collection devices widely used in various industrial production fields. They play a vital role in improving air quality and reducing dust pollution. The working principle of a pulse-jet baghouse dust collector is mainly based on the filtration effect of filter bags. Dust-laden gas enters the dust collector through the inlet and is evenly distributed into each filter bag chamber by a baffle plate. Inside the bag chamber, the gas is filtered by the filter bags, and dust is trapped on the surface of the bags, while the purified gas is discharged from the outlet. As dust accumulates on the bags, the permeability of the bags gradually decreases, and the resistance increases. When the resistance reaches a certain value, the pulse valve opens, and high-pressure gas is injected into the bags through nozzles, forming a momentary high-pressure airflow. This causes the bags to expand rapidly and vibrate, thereby peeling off the dust layer adhering to the surface of the bags and causing it to fall into the dust hopper. After cleaning, the bags return to their original shape and continue their filtration work.

[0003] When existing pulse jet backflushing pipes are used to prevent damage to dust collection filter bags, the pressure of the compressed gas is too high when the backflushing system removes dust from the filter bags through the jet pipe. This direct jetting can accelerate the wear of the filter bags, especially in the area at the filter bag opening that is directly subjected to the impact of the backflushing airflow. Furthermore, when the filter bag receives pulse backflushing, it expands under pressure and pulls the filter bag opening away from the installation plate, accelerating the damage to the filter bag opening and causing dust emission. Utility Model Content

[0004] To address the above problems, the purpose of this utility model is to provide a pulse backflushing pipe that prevents damage to dust collection filter bags, thereby solving the problems mentioned in the background art.

[0005] This utility model provides a pulse backflushing pipe for preventing damage to dust collection filter bags, including a housing with an internal mounting plate and filter bags, and a backflushing assembly for dust removal from the filter bags. The mounting plate has a mounting through hole, and a slide rod extending to the top of the mounting plate is movably connected to the outer edge of the mounting through hole. A retaining ring is fixedly connected to the top of the slide rod, and a spring is sleeved on the part of the slide rod between the upper surface of the mounting plate and the lower surface of the retaining ring. A retaining groove is provided at the top of the filter bag to cooperate with the retaining ring.

[0006] Preferably, an annular locking block is provided at the outer edge of the mounting through hole, which is fixedly connected to the mounting plate, and the slide rod is slidably connected to the annular locking block.

[0007] Preferably, the end of the slide bar away from the retaining ring passes through the annular retaining block and is slidably connected to it.

[0008] Preferably, the annular locking block is hollow inside, and the end of the slide rod away from the locking ring extends through the annular locking block into the inner cavity of the annular locking block.

[0009] Preferably, a limit block is fixedly connected to one end of the slide rod on the lower surface of the annular block.

[0010] Preferably, the diameter of the slide rod in the inner cavity of the annular block is larger than the diameter between the upper surface of the annular block and the lower surface of the retaining ring.

[0011] Preferably, the backflush system includes an air tank for storing compressed air, a blowpipe installed inside the housing and connected to a blowhole at its bottom, and an electromagnetic pulse valve for connecting the air tank and the blowpipe. A flow divider is installed at the bottom of the blowhole to optimize the airflow distribution.

[0012] The beneficial effects of this utility model are: by opening an installation through hole on the installation plate and movably connecting the slide rod extending from the top to the top of the installation plate, the filter bag is stably installed and easily replaced. The retaining ring at the top of the slide rod cooperates with the retaining groove at the top of the filter bag to ensure the stability of the filter bag during the dust removal process and effectively prevent the filter bag from being damaged by airflow impact or vibration.

[0013] Meanwhile, the spring fitted between the slide bar and the mounting plate not only provides elastic support during filter bag installation, but also acts as a buffer when the filter bag is subjected to pulse backflush, further protecting the filter bag from damage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the first embodiment of the present invention;

[0016] Figure 3 This is an enlarged structural diagram of point B in this utility model;

[0017] Figure 4 This is a cross-sectional structural diagram of the second embodiment of the present invention;

[0018] Figure 5 This is an enlarged structural diagram of point A in this utility model;

[0019] Figure 6 This is a top view cross-sectional structural diagram of the present invention.

[0020] In the diagram: 1. Installation plate; 2. Filter bag; 3. Housing; 4. Installation through hole; 5. Air inlet duct; 6. Air outlet duct; 7. Fan; 8. Electromagnetic pulse valve; 9. Air manifold; 10. Pulse pipe; 11. Slide rod; 12. Snap ring; 13. Spring; 14. Snap groove; 15. Annular snap block; 16. Limiting block; 17. Diverter hood. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0022] This utility model relates to a pulse backflushing pipe for preventing damage to dust collection filter bags. It mainly includes a housing 3 with an internal mounting plate 1 and filter bags 2, and a backflushing assembly for dust removal from the filter bags 2. The mounting plate 1 has mounting through holes 4. It also includes a flow guiding device (not shown in the figure), typically including components such as a flue gas distributor, which effectively distributes dust-laden gas and separates large particles, preventing the dust-laden gas from directly washing over the filter bags 2. Furthermore, it includes inlet and outlet ducts; the inlet duct 5 guides the dust-laden gas into the dust collection box, and the outlet duct 6 discharges the purified gas... The gas is discharged, and a fan 7 is installed at the air outlet duct 6 to discharge the purified gas. During use, the dust-laden gas enters the housing 3 along the air inlet duct 5 and is filtered by the filter bag 2. The dust adheres to the surface of the filter bag 2, and the filtered gas is discharged along the installation through hole 4 and the air outlet duct. When removing dust from the filter bag 2, the control system opens the electromagnetic pulse valve 8, and compressed air is instantly sprayed from the air tank 9 through the blow pipe 10 onto the filter bag 2, causing the filter bag 2 to vibrate violently and remove the accumulated dust on the surface of the filter bag 2. The above is an introduction to the existing pulse backflushing pipeline for preventing damage to the dust collection filter bag.

[0023] As can be seen from the above, when the existing pulse backflushing pipe for preventing damage to dust collection filter bags is in use, the pressure of the compressed gas is too high when the backflushing system removes dust from the filter bag 2 through the blow pipe 10. It directly blows onto the filter bag 2, and long-term blowing will accelerate the wear of the filter bag 2, especially in the area of ​​the filter bag 2 that is directly subjected to the impact of the backflushing airflow. Moreover, when the filter bag 2 receives pulse backflushing, the filter bag 2 expands under force and pulls the opening of the filter bag 2 away from the installation tube plate 1, which accelerates the damage to the opening of the filter bag 2 and causes dust emission. There are the following defects. Based on the above problems, the present invention adopts the following improvement method to solve them.

[0024] like Figure 1-6As shown, the pulse backflushing duct for preventing damage to the dust collection filter bags includes a housing 3 internally housing a tube sheet 1 and filter bags 2, and a backflushing assembly for dust removal from the filter bags 2. The tube sheet 1 has a mounting through hole 4. A sliding rod 11 extending above the tube sheet 1 is movably connected to the outer edge of the mounting through hole 4. A retaining ring 12 is fixedly connected to the top of the sliding rod 11. A spring 13 is fitted onto the portion of the sliding rod 11 between the upper surface of the tube sheet 1 and the lower surface of the retaining ring 12. A retaining groove 14 is provided at the top of the filter bag 2 to engage with the retaining ring 12. By opening the mounting through hole 4 on the tube sheet 1 and movably connecting the sliding rod 11 extending above the tube sheet 1, the dust collection duct is effectively completed. The rod 11 enables the stable installation and convenient replacement of the filter bag 2. The retaining ring 12 at the top of the rod 11 cooperates with the retaining groove 14 at the top of the filter bag 2. When the retaining groove 14 is snapped onto the retaining ring 12, the frame (not shown in the figure) is inserted into the filter bag 2, so that the top of the frame sits on the retaining ring 12 on which the filter bag 2 is installed, thus fixing the filter bag 2 again and ensuring the stability of the filter bag 2 during the dust removal process. This effectively prevents the filter bag 2 from being damaged by airflow impact or vibration. At the same time, the spring 13 sleeved between the rod 11 and the mounting plate 1 not only provides elastic support for the filter bag 2 during installation, but also plays a buffering role when the filter bag 2 is subjected to pulse backflush, further protecting the filter bag 2 from damage.

[0025] Furthermore, such as Figure 2-5 As shown, an annular locking block 15 is provided at the outer edge of the mounting through hole 4 and is fixedly connected to the mounting plate 1. The slide rod 11 is slidably connected to the annular locking block 15, which enhances the stability and guidance of the slide rod 11, ensures the smooth movement of the slide rod 11 in the vertical direction, and avoids the filter bag 2 being difficult to install or damaged due to the slide rod 11 deviating or getting stuck.

[0026] Furthermore, such as Figure 2-3 As shown, in the first embodiment of this utility model, the end of the slide rod 11 away from the retaining ring 12 passes through the annular retaining block 15 and is slidably connected to it. At this time, the annular retaining block 15 is solid, and the slide rod 11 completely passes through the annular retaining block 15. Because the annular retaining block 15 has thickness, the length of the slide rod 11 is relatively long, which can further increase the stability of the filter bag 2 movement.

[0027] Furthermore, such as Figure 4-5 As shown, the annular locking block 15 is hollow inside, and the end of the slide rod 11 away from the retaining ring 12 extends through the annular locking block 15 into the inner cavity of the annular locking block 15. Compared with the first embodiment, the end of the slide rod 11 away from the retaining ring 12 is hidden in the inner cavity of the annular locking block 15, which can avoid affecting the movement or installation of the filter bag 2. The hollow annular locking block 15 can reduce the weight of the installation tube sheet 1, but the stability is slightly lower than that of the first embodiment.

[0028] Furthermore, such as Figure 3As shown, a limiting block 16 is fixedly connected to one end of the slide rod 11 on the lower surface of the annular locking block 15. The size of the limiting block 16 is larger than the size of the slide rod 11, which effectively prevents the slide rod 11 from accidentally falling off during the sliding process and ensures the safety and stability of the filter bag 2 installation.

[0029] Furthermore, such as Figure 5 As shown, the diameter of the slide rod 11 located in the inner cavity of the annular locking block 15 is larger than the diameter between the upper surface of the annular locking block 15 and the lower surface of the locking ring 12. This variable diameter design not only enhances the stability of the slide rod 11 within the annular locking block 15, but also, when the backflushing system sprays compressed gas to the filter bag 2 for dust removal, the filter bag 2 moves downward under force, causing the slide rod 11 to slide downward along the annular locking block 15 and compress the spring 13, thus buffering the filter bag 2 when it is subjected to pulse backflushing. When the compressed airflow passes through the filter bag 2, the air pressure inside the filter bag 2 decreases, at which point the spring 13 returns to its original position, causing the slide rod 11 and the filter bag 2 to move upward. During the process of the slide rod 11 sliding along the annular locking block 15, it can prevent the slide rod 11 from slipping off the annular locking block 15.

[0030] Furthermore, such as Figure 1-2 As shown, the backflushing system includes an air tank 9 for storing compressed air, a blowpipe 10 installed inside the housing 3 with blowholes connected to its bottom, and an electromagnetic pulse valve 8 for connecting the air tank 9 and the blowpipe 10. A flow divider 17 is installed at the bottom of the blowhole. The flow divider 17 is also configured in a fan or cone shape, which can optimize the airflow distribution, make the airflow impact the surface of the filter bag 2 more evenly, improve the dust removal efficiency, and reduce the direct impact of the airflow on the filter bag 2, further protecting the filter bag 2 from damage. The flow divider 17 installed at the bottom of the blowhole is located inside the filter bag 2, below the opening of the filter bag 2. Since the opening of the filter bag 2 is located inside the mounting through hole 4, it contains very little dust and does not require a large compressed airflow impact, thereby further reducing the probability of damage to the opening of the filter bag 2.

Claims

1. A pulse backflushing duct for preventing damage to dust collection filter bags, comprising a housing (3) internally equipped with a tube sheet (1) and filter bags (2) and a backflushing assembly for dust removal from the filter bags (2), characterized in that: The mounting plate (1) has a mounting through hole (4). The outer edge of the mounting through hole (4) is movably connected to a slide rod (11) that extends to the top of the mounting plate (1). A retaining ring (12) is fixedly connected to the top of the slide rod (11). A spring (13) is sleeved on the part of the slide rod (11) between the upper surface of the mounting plate (1) and the lower surface of the retaining ring (12). A groove (14) is provided at the top of the filter bag (2) to cooperate with the retaining ring (12).

2. The pulse backflushing pipe for preventing damage to the dust collection filter bag according to claim 1, characterized in that: An annular locking block (15) is provided at the outer edge of the mounting through hole (4) and is fixedly connected to the mounting plate (1). The slide rod (11) is slidably connected to the annular locking block (15).

3. The pulse backflushing pipe for preventing damage to the dust collection filter bag according to claim 2, characterized in that: The end of the slide bar (11) away from the retaining ring (12) passes through the annular retaining block (15) and is slidably connected to it.

4. The pulse backflushing pipe for preventing damage to the dust collection filter bag according to claim 2, characterized in that: The annular locking block (15) is hollow inside, and the end of the slide rod (11) away from the locking ring (12) extends through the annular locking block (15) into the inner cavity of the annular locking block (15).

5. The pulse backflushing pipe for preventing damage to the dust collection filter bag according to claim 3, characterized in that: The slide bar (11) is fixedly connected to a limit block (16) at one end of the lower surface of the annular block (15).

6. The pulse backflushing pipe for preventing damage to the dust collection filter bag according to claim 4, characterized in that: The diameter of the slide rod (11) located in the inner cavity of the annular block (15) is larger than the diameter between the upper surface of the annular block (15) and the lower surface of the retaining ring (12).

7. The pulse backflushing pipe for preventing damage to dust collection filter bags according to any one of claims 1-6, characterized in that: It also includes an air tank (9) for storing compressed air, a blow pipe (10) installed inside the housing (3) with a blow hole connected to its bottom, and an electromagnetic pulse valve (8) for connecting the air tank (9) and the blow pipe (10). A flow divider (17) is installed at the bottom of the blow hole, which is used to optimize the distribution of airflow.

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