A movable dust removal filter cartridge and a dust removal device

Abstract

The application relates to a movable dust-removing filter cylinder and a dust-removing device. The dust-removing filter cylinder comprises a filter body and a lead screw. Open side end covers and closed side end covers are arranged at both ends of the filter body. The lead screw is horizontally arranged in the filter body and is screw-connected to the middle part of the closed side end cover. The filter body comprises a plurality of elastic pleats. The plurality of pleats are sequentially connected to form a circular closed loop. The lead screw is located on the axis of the circular closed loop. The two ends of the pleats are connected to the open side end cover and the closed side end cover respectively. An acute angle is formed between the pleats and the lead screw. When back-flushing, high-speed airflow impacts on the closed side end cover. The closed side end cover rotates around the lead screw and simultaneously moves linearly along the lead screw. The pleats of the filter body are stretched along the extension direction of the lead screw. The axial length and the filtering surface area of the filter body are increased. The dust accumulated on the upper part of the filter body is more easily blown away by the back-flushing airflow. The one-side stretching and twisting of the filter body more effectively shakes off the dust accumulated on the upper part of the filter body. The dust accumulated on the upper part of the filter body is avoided. The back-flushing effect is improved.

Description

Technical Field

[0001] This invention relates to the field of dust removal technology, specifically to a movable dust removal filter cartridge and a dust removal device. Background Technology

[0002] Atmospheric environmental issues are increasingly attracting strong attention from all sectors of society. Fine particulate matter in the environment has become a significant factor endangering people's health and lives. In order to control the emission of air pollutants and dust at its source, the manufacturing industry is placing increasingly higher demands on the performance and efficiency of dust removal equipment.

[0003] The filter cartridges used in dust collection devices are typically horizontally positioned cylindrical hollow filter cylinders. Each end of the filter cylinder has an open end cap and a closed end cap, which are fixed to an external sheet metal frame during installation. The filter cylinder is made of folded polyester fiber non-woven fabric. Compared to flexible and easily bent filter bags, cylindrical hollow filter cylinders are stronger, less prone to bending, and occupy less space, which helps reduce the overall size of the dust collection device, facilitates maintenance, and offers higher purification efficiency.

[0004] As the core component of a dust collector, the filter cartridge's dust removal efficiency directly affects the overall performance of the dust collector. Typically, cartridge dust collectors have an odd number of air inlets. A single inlet causes turbulence in the airflow within the chamber. This turbulent gas can backflow towards one end of the dust collector, blowing against the filter cartridge surface from the side, resulting in uneven filtration and significantly impacting filtration efficiency. Furthermore, to ensure dust removal efficiency, cartridge dust collectors are equipped with a reverse-air cleaning system. Reverse-air cleaning involves a fan or air tank instantly supplying a large volume of high-pressure gas from nozzles onto the filter screen. However, in conventional cartridge dust collectors, the reverse airflow cannot evenly remove dust from the filter cartridge surface. Filter screens closer to the nozzle receive a larger amount of reverse airflow and are cleaned more thoroughly, while dust remains adhered to other parts of the filter screen. Especially when the filter cartridge is installed horizontally, the lower filter screen is cleaned more thoroughly, while the dust on the upper filter screen is blown up and falls back onto the screen, causing blockage. Subsequent airflow will then be filtered through the cleaner filter holes. After the dust collector has been working for a period of time, the non-blocked filter screens will break due to overload; while the remaining filter screens will be blocked, greatly reducing their filtration efficiency and preventing them from filtering properly in the next filtration stage. To a certain extent, the filter screen area is reduced, while the overall load on the filter cartridge increases, affecting the dust removal efficiency. Summary of the Invention

[0005] In view of the problems existing in the prior art, one of the objectives of the present invention is to provide a movable dust removal filter cartridge that can prevent dust accumulation on the upper part of the filter body by backflushing, increase the filtration area of ​​the filter body during backflushing, and improve filtration efficiency and backflushing cleaning effect.

[0006] The second objective of this invention is to provide a dust removal device that can avoid filter cartridge clogging and has a better dust removal effect.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A movable dust collector cartridge includes a filter body and a lead screw, with an open side end cap and a closed side end cap respectively at both ends of the filter body;

[0009] The lead screw is horizontally inserted into the filter body, and the lead screw is threaded to the middle of the closed side end cap.

[0010] The filter body includes multiple elastic pleats, which are connected in sequence to form a circular closed loop, and the lead screw is located on the axis of the circular closed loop;

[0011] The two ends of the pleat are connected to the open end cap and the closed end cap respectively, and there is an acute angle between the pleat and the lead screw.

[0012] Furthermore, the longitudinal section of the pleat gradually increases from the middle part of the pleat towards the open end cap and the closed end cap, respectively.

[0013] Furthermore, the angle between the pleat and the lead screw is a multiple of the lead screw's helix angle.

[0014] Furthermore, the elongation distance of the pleats is proportional to the lead of the lead screw.

[0015] Furthermore, a nut is fixed in the middle of the closed side end cap, and a screw thread is connected to the nut.

[0016] Furthermore, the closed side end cap has a mounting hole in the middle for positioning the nut.

[0017] Furthermore, sealing rings are installed at both ends of the nut.

[0018] Furthermore, one end of the lead screw passes through the closed side end cover and is fitted with a pressure cap. A handwheel is provided on the outside of the pressure cap, and the handwheel is threadedly connected to the lead screw and presses against the pressure cap.

[0019] Furthermore, a sealing strip is provided on one side of the gland.

[0020] A dust removal device includes a movable dust removal filter cartridge.

[0021] In summary, the present invention has the following advantages:

[0022] During installation, first fix the open end cap of the filter cartridge to the external sheet metal frame, and install the lead screw on the other side of the external sheet metal frame. When backflushing is performed, a high-speed airflow enters the filter body cavity from the open end cap. On the one hand, this high-speed airflow creates a momentary positive pressure inside the filter cartridge, causing expansion and micro-movement, which dislodges dust from the filter body. On the other hand, the high-speed airflow impacts the closed end cap, and under the action of the ball screw, the closed end cap rotates around the screw and moves linearly along the screw, causing the filter body to stretch and rotate. The pleats extend along the extension direction of the screw, and the angle between the pleats and the screw gradually decreases until the pleats and the screw are parallel to each other. After the pleats extend, the axial length of the filter body is increased, and the filtration surface area of ​​the filter body is increased, making it easier for dust accumulated on the upper part of the filter body to be blown away by the backflushing airflow. Meanwhile, the open end cap on one side of the filter cartridge is fixed, and the closed end cap on the other side drives the filter body to stretch and twist on one side. Compared with the overall rotation of the filter cartridge, it has a greater vibration force and speed change, which can more effectively shake off the dust accumulated on the top of the filter body. The dust that is shaken up will not fall back onto the rotating filter body, thus avoiding dust accumulation on the top of the filter body and improving the back-blowing cleaning effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the dust removal device provided in the embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the planar structure of the dust collector filter cartridge provided in the embodiments of this application;

[0025] Figure 3 An exploded view of the dust collector filter cartridge provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the filtration process of the dust removal device provided in the embodiments of this application;

[0027] Figure 5 This is a schematic diagram of the backflushing process of the dust removal device provided in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the dust collector filter cartridge before stretching, provided in an embodiment of this application.

[0029] Figure 7 This is a schematic diagram of the stretched structure of the dust collector filter cartridge provided in the embodiment of this application.

[0030] In the picture:

[0031] 1 is the open side end cap, 2 is the filter body, 3 is the closed side end cap, 4 is the nut, 5 is the screw rod, 6 is the sealing ring, 7 is the handwheel, 8 is the pressure cap, 9 is the sealing strip, 2-1 is the fixing bolt, 2-2 is the air outlet, 2-3 is the inner cavity, 2-4 is the nut mounting hole, and 2-5 is the bolt mounting hole. Detailed Implementation

[0032] The present invention will now be described in further detail.

[0033] like Figures 1-3 As shown, a movable dust collector cartridge includes an open side end cap 1, a filter body 2, a fixing bolt 2-1, an air outlet 2-2, an inner cavity 2-3, a nut mounting hole 2-4, a bolt mounting hole 2-5, and a closed side end cap 3, etc.

[0034] The filter body 2 has an inner cavity 2-3 for gas flow. One end of the filter body 2 is connected to an open end cap 1 and has an air outlet 2-2 communicating with the inner cavity 2-3. The other end of the filter body 2 is a closed end cap 3. Figure 5 As shown, external air can enter the inner cavity 2-3 from the air outlet 2-2; as Figure 4 As shown, the gas in the inner cavity 2-3 can also be discharged from the air outlet 2-2. In this embodiment, the axis of the filter body 2, the axis of the open-side end cap 1, and the axis of the closed-side end cap 3 coincide. The coincidence of the axes allows the backflushing airflow to flow smoothly into the inner cavity 2-3, which helps to ensure the dust removal effect.

[0035] A nut 4 is located in the middle of the closed end cap 3. A lead screw 5 passes horizontally through the horizontally placed dust collector filter cartridge and is threadedly connected to the nut 4 in the middle of the closed end cap 3. Ball bearings are installed inside the nut 4, and the ball bearings move relative to the lead screw 5, causing the nut 4 to move on the lead screw 5. The nut 4 can be tightly fitted with the closed end cap 3 through the nut mounting hole 2-4 and the bolt mounting hole 2-5, and move together with it. Sealing rings 6 are installed on both sides of the nut 4 to protect the ball screw 5 from interference by dust and other impurities during operation.

[0036] The filter body 2 includes multiple elastic pleats, with filter grooves formed between adjacent pleats. The extension direction of the filter grooves is consistent with the helical direction of the lead screw 5. The multiple filter grooves are circumferentially and equidistantly distributed. The multiple pleats are sequentially connected to form a circular closed loop. The lead screw 5 is located on the axis of the circular closed loop. The two ends of the pleats are respectively connected to the open-side end cap and the closed-side end cap 3. There is an acute angle between the pleats and the lead screw 5. This angle is related to the selected ball screw 5. Preferably, the ratio of this angle to the helix angle of the ball screw 5 is 1:1 or 1:2. Compared with the straight cylindrical type, the filter body 2 with inclined pleats has a larger filtration area, lower filtration velocity, less pressure loss, and better filtration effect.

[0037] like Figure 6 As shown, the longitudinal section of the pleats gradually increases from the middle of the pleats towards the open end cap 1 and the closed end cap 3, causing the overall cross-sectional shape of the filter body 2 from the open end cap 1 to the closed end cap 3 to show a trend of first contraction and then expansion. This structure gives the filter body 2 a larger filtration surface area and makes it easy to rotate and stretch.

[0038] like Figure 2 As shown, a fixing bolt 2-1 is arranged on the open-side end cap 1 for connection with the sheet metal frame. During installation, the open-side end cap 1 of the filter cartridge is first fixed to the external sheet metal frame using the fixing bolt 2-1, and the threaded rod 5 is installed on the other side of the external sheet metal frame.

[0039] like Figure 5 As shown, during backflushing cleaning, the high-speed airflow from the outside enters the inner cavity 2-3 of the filter body 2 from the side of the open end cover 1. The high-speed, high-pressure airflow will cause an induced defect flow equivalent to 1 to 2 times the volume of the ejector airflow to be formed in the inner cavity 2-3. On the one hand, the high-speed airflow will cause an instantaneous positive pressure in the filter cartridge and generate expansion and micro-movement, causing the dust accumulated on the filter body 2 to fall off. On the other hand, the high-speed airflow impacts the closed end cover 3. Under the action of the ball screw 5, the closed end cover 3 will drive the nut 4 fixed on it to move axially along the screw 5. The nut 4 and the closed end cover 3 rotate simultaneously, causing the filter body 2 to stretch and rotate.

[0040] like Figure 7 As shown, during rotation, the pleats can extend along the extension direction of the lead screw 5. The angle between the pleats and the lead screw 5 gradually decreases until the pleats and the lead screw 5 are parallel to each other. After the pleats extend, the axial length of the filter body 2 is increased, and the filtration surface area of ​​the filter body 2 is increased. The dust accumulated on the upper part of the filter body 2 is more easily blown away by the backflushing airflow. At the same time, since the open end cap 1 on one side of the filter cartridge is fixed, and the closed end cap 3 on the other side drives the filter body 2 to stretch and twist on one side, it has a greater vibration force and speed change than the uniform rotation of the entire filter cartridge. Therefore, it can more effectively shake off the dust accumulated on the upper part of the filter body 2. Since the vibration direction is not parallel to the extension direction of the lead screw 5, the dust shaken up will move away from the filter body 2 and will not fall back onto the rotating filter body 2, thus avoiding dust accumulation on the upper part of the filter body 2 and improving the backflushing cleaning effect.

[0041] Since there is a certain proportional relationship between the tilt angle of the filter body 2 and the lifting angle of the lead screw 5, after the filter body 2 has been extended and rotated, the tilt angle of the filter body 2 can become 0° or the opposite of the original angle. The extension length of the filter body 2 is a multiple of the lead of the lead screw 5.

[0042] After the backflushing cleaning is completed, the pleats of the filter body 2 twist in the opposite direction due to their own elasticity. After the nut 4 drives the closed end cap 3 to move in the opposite direction along the screw 5, the filter body 2 returns to its initial state.

[0043] In one embodiment of this application, please refer to Figure 3The lead screw 5 passes through the nut 4 and moves in conjunction with the nut 4. The tail end of the lead screw 5 away from the filter cartridge closed side cover 3 passes through the pressure cover 8 and engages with the hollow part of the handwheel 7 through the thread. The handwheel 7 can rotate and is close to the pressure cover 8. The inner side of the pressure cover 8 is covered with a sealing strip 9. The two work together to form a closed structure with the sheet metal frame.

[0044] Specifically, in practice, the filter body 2, nut 4, and lead screw 5 are mainly used to assist the dust collector filter cartridge in removing the dust adsorbed on the filter body 2. The service life of the nut 4 and lead screw 5 is much longer than that of the filter body 2. When the filter body 2 is worn out, the pressure cover 8 can be removed by turning the handwheel 7, and the filter cartridge can be taken out and replaced, thus achieving the purpose of reusing the ball screw 5.

[0045] A dust removal device includes the movable dust removal filter cartridge described above, which has at least all the beneficial effects of the dust removal filter cartridge of the above embodiments, and will not be described in detail here.

[0046] In one embodiment of this application (not shown in the figure), the dust removal device also includes a fan, which is located at the air outlet 2-2.

[0047] Specifically, the fan can blow external air into the inner cavity 2-3 and also extract air from the inner cavity 2-3. When the operator needs the dust collector filter cartridge to filter the surrounding air, the dust removal device's filtration function is activated. Then, the fan extracts the air from the inner cavity 2-3, and the air around the dust collector filter cartridge, after being filtered by the filter body 2, is replenished into the inner cavity 2-3, thus completing the filtration of the surrounding air. When the operator needs to remove dust from the dust collector filter cartridge, the dust removal function of the dust removal device is activated, the electromagnetic pulse valve opens, and the cylinder... Compressed air is ejected through a pulse valve and a small hole on the blowpipe, resulting in a high-speed, high-pressure jet flow. On one hand, this high-speed airflow creates an induced defect flow in the inner cavity 2-3, which is equivalent to 1-2 times the volume of the jet flow. This causes an instantaneous positive pressure in the filter cartridge, resulting in bulging and micro-movement, causing the dust on the filter body 2 to fall off. On the other hand, the jet flow impacts the closed end cover 3, and under the action of the ball screw 5, the filter body 2 is stretched and rotated, preventing the dust that was shaken up on the upper part of the filter body 2 from falling back onto the filter body 2.

[0048] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A movable dust collector filter cartridge, characterized in that: It includes a filter body and a lead screw, with an open end cap and a closed end cap at each end of the filter body; The lead screw is horizontally inserted into the filter body, and the lead screw is threaded to the middle of the closed side end cap. The filter body includes multiple elastic pleats, which are connected in sequence to form a circular closed loop, and the lead screw is located on the axis of the circular closed loop; The two ends of the pleat are connected to the open end cap and the closed end cap, respectively, and there is an acute angle between the pleat and the lead screw. The longitudinal section of the pleat gradually increases from the middle part of the pleat towards the open end cap and the closed end cap, respectively; The angle between the pleat and the lead screw is a multiple of the lead screw's helix angle; The elongation distance of the pleats is proportional to the lead of the lead screw.

2. The movable dust collector filter cartridge according to claim 1, characterized in that: A nut is fixed in the middle of the closed side end cap, and a screw is threaded to the nut.

3. A movable dust collector filter cartridge according to claim 2, characterized in that: The closed side end cap has a mounting hole in the middle for the nut to be installed and positioned.

4. A movable dust collector filter cartridge according to claim 2, characterized in that: Both ends of the nut are fitted with sealing rings.

5. A movable dust collector filter cartridge according to claim 1, characterized in that: One end of the lead screw passes through the closed side end cover and is fitted with a pressure cap. A handwheel is provided on the outside of the pressure cap. The handwheel is threaded to the lead screw and presses against the pressure cap.

6. A movable dust collector filter cartridge according to claim 5, characterized in that: A sealing strip is provided on one side of the gland.

7. A dust removal device, characterized in that: Includes a movable dust removal filter cartridge as described in any one of claims 1-6.

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