PM2.5 bag filter with intelligent cleaning function

Abstract

The invention discloses a PM2.5 bag filter with an intelligent cleaning function, and relates to the technical field of PM2.5 bag filters. Comprising a box body, an air inlet, a pulse device, an air outlet, a dust hopper, a bag filter assembly, a partition plate and a blowing pipe, deflection of a secondary filter assembly is utilized to synchronously drive a detection rod on a sliding frame to move in a detection shell, so that magnetic flux of two secondary coils is changed, an electric signal is generated, and a control system analyzes the magnitude of the electric signal; and the control system analyzes the dissipation amount of PM2.5 according to the deflection amount of the secondary filter disc, so that the aim of monitoring the filtering effect of the filter bag is fulfilled. When the filter bag is cleaned or replaced, meshes are large, and the filtering effect is reduced, escaping PM2.5 is intercepted and filtered through the second-stage filter disc. By utilizing the deflectability of the secondary filter discs, when a large amount of PM2.5 escapes, the impact force of the gas is converted into self deflection, the overlapping degree between the secondary filter discs is increased, and the filtering effect on the PM2.5 is adaptively increased.

Description

Technical Field

[0001] The present invention relates to the technical field of PM2.5 bag filters, and specifically to a PM2.5 bag filter with an intelligent cleaning function. Background Art

[0002] As an important equipment for industrial flue gas treatment, the bag filter plays a crucial role. By adopting high-efficiency filter materials and precise sealing technologies, this equipment can effectively capture the dust and particles emitted during industrial production, especially the interception of fine particles such as PM2.5, significantly reducing the concentration of harmful substances entering the atmosphere, thereby improving air quality and alleviating air pollution.

[0003] However, during the use of the bag filter, the filter bags need to be maintained. When the filter bags are damaged due to chemical corrosion or fatigue aging, new filter bags need to be replaced in a timely manner; and after long-term use, the filter bags need to be cleaned. Due to the difficulty in accurately controlling the cleanliness, there are prone to situations of local over-cleaning or local fiber damage. In the above situations, due to the relatively large mesh size of the clean filter bags, under the action of a relatively high filtration wind speed, fine particles such as PM2.5 are likely to penetrate through the filter bags and escape, not only causing the emission concentration to exceed the standard but also forming secondary air pollution. Summary of the Invention

[0004] The purpose of the present invention is to provide a PM2.5 bag filter with an intelligent cleaning function to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A PM2.5 bag filter with an intelligent cleaning function includes a box body. An air inlet is provided on one side of the box body, and an air outlet is provided on the other side of the box body. A pulse device is installed on the box body. A partition is provided inside the box body, and a plurality of bag filter components are installed on the partition. A blowpipe is installed on the partition, and a plurality of nozzles are provided on the blowpipe. The positions of the nozzles correspond to the positions of the bag filter components. The blowpipe is communicated with the pulse device. A hopper is provided at the bottom end of the box body, and a filtering fan is provided at the top end of the box body.

[0006] The bag filter is externally connected to a control cabinet, and a control system is provided inside the control cabinet. The control system is used to control the entire bag filter. The filtering fan is used to drive the dust-containing gas to flow inside the box body.

[0007] The dust-containing gas enters the box body from the air inlet. After being filtered by the bag filter components, it flows upward from the bag filter components, passes through the partition, and is discharged from the air outlet. When the dust on the bag filter components is relatively large and needs to be removed, the control system activates the pulse device. The pulse valve on the pulse device opens, and the compressed air is distributed to each nozzle through the blowpipe. The compressed air sprays out from the nozzles, impacts the bag filter components, and causes the dust to fall off. The fallen dust falls into the hopper and is collected.

[0008] Furthermore, the bag filter assembly includes a secondary filter, which is installed on the partition board. A filter bag is installed at the bottom of the secondary filter. A first telescopic hose and a second telescopic hose are respectively installed on the secondary filter. A cage is arranged inside the filter bag.

[0009] The cage is used to support the inside of the filter bag.

[0010] Furthermore, the secondary filter includes a fixed cylinder, which is installed on the partition board. A sliding frame is slidably installed on the fixed cylinder. A first telescopic hose and a second telescopic hose are respectively installed between the sliding frame and the fixed cylinder. A plurality of secondary filter components are rotatably installed on the fixed cylinder. The secondary filter components are in meshing transmission with the sliding frame. A regulator is installed inside the fixed cylinder. The secondary filter components are in meshing transmission with the regulator. A detector is installed between the fixed frame and the sliding frame. A vibration spring is installed between the fixed cylinder and the sliding frame.

[0011] Furthermore, the regulator includes an adjustment shell. A connecting rod is installed on the adjustment shell. One end of the connecting rod is connected to the fixed cylinder. An adjustment motor is installed inside the adjustment shell. A lead screw is installed on the output shaft of the adjustment motor. Symmetrical threads are provided on the lead screw. Pressing plates are symmetrically and slidably installed inside the adjustment shell. The pressing plates are in threaded connection with the lead screw. An adjustment sliding frame is slidably installed inside the adjustment shell. An adjustment spring is installed between the adjustment sliding frame and the pressing plates. The secondary filter components penetrate through the adjustment shell and are in meshing transmission with the adjustment sliding frame.

[0012] The output shaft of the adjustment motor drives the lead screw to rotate. The lead screw drives the pressing plates to slide inside the adjustment shell through the threads. Since the threads on the lead screw are symmetrically arranged, the two pressing plates will approach or move away from each other when they are displaced. When the pressing plates approach each other, the adjustment spring is compressed, and the elastic force applied to the adjustment sliding frame increases. When the adjustment sliding frame slides, the adjustment springs on both sides will be respectively compressed and stretched. At this time, the elastic force that needs to be overcome when the adjustment sliding frame slides up and down increases. When the pressing plates move away from each other, the adjustment spring in the compressed state gradually elongates and rebounds, and the elastic force applied to the adjustment sliding frame decreases. The elastic force that needs to be overcome when the adjustment sliding frame slides up and down decreases. The control system realizes the purpose of adjusting the sliding resistance of the adjustment sliding frame by adjusting the distance between the pressing plates.

[0013] When the secondary filter element drives the rotating rod to rotate, the rotating rod will drive the second gear to rotate. When the second gear rotates, it drives the adjustment sliding frame to slide inside the adjustment shell through the resistance teeth. Since the adjustment sliding frame is subject to the resistance of the adjustment spring, the secondary filter element needs sufficient external force to overcome this resistance in order to deflect by a corresponding angle. The smaller the resistance, the easier it is for the secondary filter element to deflect, and the higher the sensitivity. The larger the resistance, the more difficult it is for the secondary filter element to deflect, and the lower the sensitivity.

[0014] The external force on the secondary filter is positively correlated with the filtration air velocity and the PM2.5 particle content in the air flow (the greater the filtration air velocity, the greater the deflection angle of the secondary filter; the greater the PM2.5 particle content in the air flow, the stronger the impact on the secondary filter, and the greater the deflection angle of the secondary filter). In order to eliminate the influence factor of the filtration air velocity, the control system adjusts the sensitivity of the secondary filter according to the wind speed. The greater the wind speed, the lower the sensitivity, thus offsetting the wind force and avoiding the influence of the wind speed on the detector, and increasing the detection accuracy of the detector for the PM2.5 content.

[0015] Furthermore, the secondary filtration component includes a rotating rod. One end of the rotating rod penetrates through the adjusting shell and is installed with a second gear, and the second gear is in meshing transmission with the adjusting slide. The other end of the rotating rod penetrates through the fixed cylinder and is installed with a first gear, and the first gear is in meshing transmission with the sliding frame. The secondary filter is obliquely installed on the rotating rod, and a secondary filter screen is provided on the secondary filter.

[0016] The secondary filter screen is made of a fine surface layer multi-gradient filter screen material and is used to filter and block fine particles such as PM2.5. A number of obliquely arranged secondary filters overlap each other to effectively secondarily filter the passing gas.

[0017] When the dust-containing gas passes through the bag filter component, the dust in the gas is filtered by the filter bag, and the filtered gas passes upward through the secondary filter. When the gas is filtered cleanly, the impact on the secondary filter screen when passing through the secondary filter is small, and the secondary filter cannot drive the rotating rod to deflect.

[0018] When a large amount of PM2.5 particles escape due to the large mesh size of the filter bag during cleaning or replacement, the gas mixed with a large amount of fine particles impacts on the secondary filter, causing a large impact on the secondary filter, causing the secondary filter to deflect from the oblique direction around the rotating rod to the horizontal direction. The secondary filter drives the first gear and the second gear to rotate through the rotating rod. The first gear drives the sliding frame to slide upward through the sliding teeth, the vibration spring is compressed, the detection rod on the sliding frame moves in the detection housing, the iron core generates a displacement, changing the magnetic fluxes of the two secondary coils. The greater the displacement of the iron core, the stronger the electrical signal. The control system analyzes the magnitude of the electrical signal, detects the displacement of the iron core, and then obtains the deflection amount of the secondary filter. The control system analyzes the escape amount of PM2.5 according to the deflection amount of the secondary filter.

[0019] The secondary filter screen on the secondary filter intercepts and filters PM2.5. Moreover, the greater the PM2.5 content, the greater the deflection angle of the secondary filter, the more horizontal the angle of the secondary filter, the greater the overlapping degree between the secondary filters, and the stronger the filtering effect on PM2.5.

[0020] When the bag filter component is pulse-cleaned, the impact air flow preferentially impacts on the secondary filter element, flushing the PM2.5 particles attached to the secondary filter element into the filter bag. After being impacted, the secondary filter element deflects, turning from an oblique angle to a vertical angle. The secondary filter element drives the first gear to rotate through a rotating rod, and the first gear drives the sliding frame to slide downward through a sliding tooth, stretching the vibration spring. The secondary filter element at the vertical angle loses its block on the impact air flow, and the unconsumed impact air flow continues to impact the filter bag downward, causing the dust on the filter bag to fall off. After a single impact air flow dissipates, the vibration spring drives the sliding frame to rebound and reset, and the sliding frame drives the filter bag to vibrate under the action of the vibration spring, further helping the dust on the filter bag to fall off. This is repeated, and under the impact of multiple impact air flows, the dust is cleared, and the PM2.5 in the filter bag passes through the filter bag after being impacted and falls into the ash hopper together with the dust.

[0021] Further, a number of resistance teeth are provided on the adjustment sliding frame, and the adjustment sliding frame is in meshing transmission with the second gear through the resistance teeth.

[0022] Further, a sliding tooth is provided on the sliding frame, and the sliding frame is in meshing transmission with the first gear through the sliding tooth. A number of sliding rods are provided at the bottom end of the sliding frame. The sliding rods penetrate through the fixed cylinder and are installed with mounting rings, and filter bags are installed on the mounting rings. A second telescopic hose is installed between the bottom end of the fixed cylinder and the mounting ring, and a first telescopic hose is installed between the top end of the fixed cylinder and the mounting ring.

[0023] The first telescopic hose and the second telescopic hose can freely expand and contract, which is used to ensure the sealing performance between the fixed cylinder and the sliding frame.

[0024] Further, the detector includes a detection rod and a detection housing. The detection rod is installed on the fixed cylinder, and the detection housing is installed on the sliding frame. A primary coil is provided inside the detection housing, and secondary coils are provided at both ends of the primary coil. An iron core is provided inside the detection rod. The detection rod penetrates through the sliding frame, and the iron core is located inside the detection housing.

[0025] After the primary coil is electrified, a magnetic field is generated. When the iron core is in the middle position of the primary coil, the magnetic fluxes received by the two secondary coils are the same, the induced voltage magnitudes are equal, and the voltage difference between the two is zero. When the iron core generates displacement, the magnetic fluxes of the two secondary coils are changed, and a voltage difference is generated between the two. The control system analyzes the magnitude of the voltage difference to detect the displacement amount of the iron core.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. When using the pulse device for cleaning, the impact air flow preferentially impacts on the secondary filter, flushing the PM2.5 particles attached to the secondary filter into the filter bag, and then using the unconsumed impact air flow to continue to impact downward on the filter bag, causing the dust on the filter bag to fall off, thus completing the double cleaning of the filter bag and the secondary filter screen. After a single-strand impact air flow dissipates, the vibration spring drives the sliding frame to rebound and reset, and the sliding frame drives the filter bag to vibrate under the action of the vibration spring, further helping the dust on the filter bag to fall off.

[0028] 2. Use the adjustment motor to drive the screw rod with symmetric threads to rotate, and the screw rod drives the distance between the adjustment pressing plates, changing the compression amount of the adjustment spring, so as to achieve the purpose of adjusting the deflection sensitivity of the secondary filter. The control system adjusts the sensitivity of the secondary filter according to the wind speed, thereby offsetting the wind force and avoiding the influence of the wind speed on the detector, and increasing the detection accuracy of the detector for the PM2.5 content.

[0029] 3. Use the deflection of the secondary filtering component to synchronously drive the detection rod on the sliding frame to move in the detection housing, the iron core generates a displacement, causing the magnetic fluxes of the two secondary coils to change, generating an electrical signal. The control system analyzes the magnitude of the electrical signal, detects the displacement amount of the iron core, and then obtains the deflection amount of the secondary filter. The control system analyzes the escape amount of PM2.5 according to the deflection amount of the secondary filter, achieving the purpose of monitoring the filtering effect of the filter bag.

[0030] 4. Use the filter bag to preliminarily filter the dust-containing gas. When the filter bag has a large mesh size due to cleaning or replacement and the filtering effect decreases, intercept and filter the escaped PM2.5 through the secondary filter. Utilize the deflectability of the secondary filter. When a large amount of PM2.5 escapes, convert the impact force of the gas into its own deflection, increasing the overlap degree between the secondary filters, so that the filtering effect on PM2.5 adaptively increases. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is an overall three-dimensional view of the bag filter of the present invention;

[0032] Figure 2 It is a three-dimensional view of the bag filter of the present invention;

[0033] Figure 3 It is a three-dimensional view of the bag filter assembly of the present invention;

[0034] Figure 4 It is a three-dimensional view of the secondary filter of the present invention Figure 1 ;

[0035] Figure 5 It is a three-dimensional view of the secondary filter of the present invention Figure 2 ;

[0036] Figure 6 It is a three-dimensional view of the secondary filtering component of the present invention;

[0037] Figure 7 For the present invention Figure 5 Partial enlarged view of area A in

[0038] Figure 8 Stereogram of the sliding frame of the present invention

[0039] Figure 9 Stereogram of the fixed cylinder of the present invention

[0040] Figure 10 Stereogram of the regulator of the present invention

[0041] Figure 11 Stereogram of the adjusting sliding frame of the present invention

[0042] Figure 12 Stereogram of the detector of the present invention

[0043] Figure 13 For the present invention Figure 6 Partial enlarged view of area B in

[0044] In the figure: 1, box body; 2, air inlet; 3, pulse device; 4, air outlet; 5, ash hopper; 6, bag filter assembly; 7, partition board; 8, blowpipe; 61, filter bag; 62, first telescopic hose; 63, second telescopic hose; 9, secondary filter; 91, fixed cylinder; 92, sliding frame; 93, vibration spring; 94, regulator; 95, secondary filter assembly; 96, detector; 921, sliding tooth; 922, sliding rod; 923, mounting ring; 941, adjusting shell; 942, connecting rod; 943, adjusting motor; 944, adjusting sliding frame; 945, lead screw; 946, pressing plate; 947, adjusting spring; 9441, resistance tooth; 951, secondary filter element; 952, rotating rod; 953, first gear; 954, second gear; 961, detection rod; 962, detection housing; 963, primary coil; 964, secondary coil. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] As Figures 1 - 13As shown in the figure, the present invention provides a technical solution for a PM2.5 bag filter with intelligent cleaning function: including a box body 1, an air inlet 2 is provided on one side of the box body 1, an air outlet 4 is provided on the other side of the box body 1, a pulse device 3 is installed on the box body 1, a partition 7 is provided inside the box body 1, a number of bag filter components 6 are installed on the partition 7, a blowpipe 8 is installed on the partition 7, a number of nozzles are provided on the blowpipe 8, the positions of the nozzles correspond to the positions of the bag filter components 6, the blowpipe 8 is communicated with the pulse device 3, a ash hopper 5 is provided at the bottom end of the box body 1, and a filtering fan is provided at the top end of the box body 1. The bag filter is externally connected with a control cabinet, and a control system is provided inside the control cabinet, and the control system is used to control the entire bag filter. The filtering fan is used to drive the dust-containing gas to flow inside the box body 1.

[0047] The bag filter component 6 includes a secondary filter 9, the secondary filter 9 is installed on the partition 7, a filter bag 61 is installed at the bottom end of the secondary filter 9, a first telescopic hose 62 and a second telescopic hose 63 are respectively installed on the secondary filter 9, and a bag cage is provided inside the filter bag 61. The bag cage is used to support the inside of the filter bag 61.

[0048] The secondary filter 9 includes a fixed cylinder 91, the fixed cylinder 91 is installed on the partition 7, a sliding frame 92 is slidably installed on the fixed cylinder 91, a first telescopic hose 62 and a second telescopic hose 63 are respectively installed between the sliding frame 92 and the fixed cylinder 91, a number of secondary filter components 95 are rotatably installed on the fixed cylinder 91, the secondary filter components 95 are in meshing transmission with the sliding frame 92, a regulator 94 is installed inside the fixed cylinder 91, the secondary filter components 95 are in meshing transmission with the regulator 94, a detector 96 is installed between the fixed frame and the sliding frame 92, and a vibration spring 93 is installed between the fixed cylinder 91 and the sliding frame 92.

[0049] The regulator 94 includes an adjustment shell 941, a connecting rod 942 is installed on the adjustment shell 941, one end of the connecting rod 942 is connected to the fixed cylinder 91, an adjustment motor 943 is installed inside the adjustment shell 941, a lead screw 945 is installed on the output shaft of the adjustment motor 943, symmetrical threads are provided on the lead screw 945, pressure plates 946 are symmetrically and slidably installed inside the adjustment shell 941, the pressure plates 946 are in threaded connection with the lead screw 945, an adjustment slide frame 944 is slidably installed inside the adjustment shell 941, an adjustment spring 947 is installed between the adjustment slide frame 944 and the pressure plates 946, and the secondary filter components 95 penetrate through the adjustment shell 941 and are in meshing transmission with the adjustment slide frame 944.

[0050] The secondary filter component 95 includes a rotating rod 952, one end of the rotating rod 952 penetrates through the adjustment shell 941 and a second gear 954 is installed, the second gear 954 is in meshing transmission with the adjustment slide frame 944, the other end of the rotating rod 952 penetrates through the fixed cylinder 91 and a first gear 953 is installed, the first gear 953 is in meshing transmission with the sliding frame 92, and secondary filter plates 951 are obliquely installed on the rotating rod 952, and secondary filter meshes are provided on the secondary filter plates 951.

[0051] The secondary filter screen is made of a fine-layer multi-gradient filter screen material and is used to filter and block fine particles such as PM2.5. A number of obliquely arranged secondary filter plates 951 overlap each other to effectively perform secondary filtration on the passing gas.

[0052] A number of resistance teeth 9441 are provided on the adjustment carriage 944, and the adjustment carriage 944 is in meshing transmission with the second gear 954 through the resistance teeth 9441.

[0053] Sliding teeth 921 are provided on the sliding carriage 92. The sliding carriage 92 is in meshing transmission with the first gear 953 through the sliding teeth 921. A number of sliding rods 922 are provided at the bottom end of the sliding carriage 92. The sliding rods 922 penetrate through the fixed cylinder 91 and are installed with an installation ring 923. A filter bag 61 is installed on the installation ring 923. A second telescopic hose 63 is installed between the bottom end of the fixed cylinder 91 and the installation ring 923, and a first telescopic hose 62 is installed between the top end of the fixed cylinder 91 and the installation ring 923.

[0054] The detector 96 includes a detection rod 961 and a detection housing 962. The detection rod 961 is installed on the fixed cylinder 91, and the detection housing 962 is installed on the sliding carriage 92. A primary coil 963 is provided inside the detection housing 962. Secondary coils 964 are provided at both ends of the primary coil 963. An iron core is provided inside the detection rod 961. The detection rod 961 penetrates through the sliding carriage 92, and the iron core is located inside the detection housing 962.

[0055] After the primary coil 963 is powered on, a magnetic field is generated. When the iron core is in the middle position of the primary coil 963, the magnetic fluxes received by the two secondary coils 964 are the same, the induced voltage magnitudes are equal, and the voltage difference between the two is zero. When the iron core generates a displacement, the magnetic fluxes of the two secondary coils 964 are changed, a voltage difference is generated between the two, and the control system detects the displacement amount of the iron core by analyzing the magnitude of the voltage difference.

[0056] Working principle of the present invention: The dust-containing gas enters the box body 1 from the air inlet 2. After being filtered by the bag filter assembly 6, it flows upward from the bag filter assembly 6, passes through the partition plate 7, and is discharged from the air outlet 4. When the dust on the bag filter assembly 6 is relatively large and needs to be removed, the control system turns on the pulse device 3. The pulse valve on the pulse device 3 is opened, and the compressed air is distributed to each nozzle through the blowpipe 8. The compressed air is ejected from the nozzle, impacts the bag filter assembly 6, and causes the dust to fall off. The fallen dust falls into the ash hopper 5 and is collected.

[0057] When the dust-containing gas passes through the bag filter assembly 6, the dust in the gas is filtered by the filter bag 61. After the gas is filtered, when it passes upward through the secondary filter 9 and the gas is filtered cleanly, the impact on the secondary filter screen when passing through the secondary filter plate 951 is small, and the secondary filter plate 951 cannot drive the rotating rod 952 to deflect.

[0058] When the filter bag 61 has a large mesh due to cleaning or replacement, resulting in a large amount of PM2.5 particles escaping, the gas mixed with a large amount of fine particles impacts on the secondary filter element 951, causing a large impact on the secondary filter element 951, making the secondary filter element 951 deflect from the inclined direction around the rotating rod 952 to the horizontal direction. The secondary filter element 951 drives the first gear 953 and the second gear 954 to rotate through the rotating rod 952. The first gear 953 drives the sliding frame 92 to slide upward through the sliding teeth 921. The vibration spring 93 is compressed. The detection rod 961 on the sliding frame 92 moves in the detection housing 962, and the iron core generates a displacement, causing the magnetic fluxes of the two secondary coils 964 to change. The greater the displacement of the iron core, the stronger the electrical signal. The control system analyzes the magnitude of the electrical signal, detects the displacement of the iron core, and thus obtains the deflection amount of the secondary filter element 951. The control system analyzes the escape amount of PM2.5 based on the deflection amount of the secondary filter element 951.

[0059] The secondary filter screen on the secondary filter element 951 intercepts and filters PM2.5. Moreover, the greater the content of PM2.5, the greater the deflection angle of the secondary filter element 951, the more horizontal the angle of the secondary filter element 951 becomes, and the greater the overlapping degree between the secondary filter elements 951, resulting in a stronger filtering effect on PM2.5.

[0060] When pulse cleaning is performed on the bag filter assembly 6, the impact air flow first impacts on the secondary filter element 951, flushing the PM2.5 particles attached to the secondary filter element 951 into the filter bag 61. After being impacted, the secondary filter element 951 deflects, turning from the inclined angle to the vertical angle. The secondary filter element 951 drives the first gear 953 to rotate through the rotating rod 952. The first gear 953 drives the sliding frame 92 to slide downward through the sliding teeth 921. The vibration spring 93 is stretched. The secondary filter element 951 at the vertical angle loses its block on the impact air flow, and the unconsumed impact air flow continues to impact downward on the filter bag 61, causing the dust on the filter bag 61 to fall off. After a single impact air flow dissipates, the vibration spring 93 drives the sliding frame 92 to rebound and reset. The sliding frame 92 drives the filter bag 61 to vibrate under the action of the vibration spring 93, further helping the dust on the filter bag 61 to fall off. This process is repeated, and under the impact of multiple impact air flows, the dust is completely removed. The PM2.5 in the filter bag 61 passes through the filter bag 61 after being impacted and falls into the ash hopper 5 together with the dust.

[0061] The output shaft of the adjusting motor 943 drives the lead screw 945 to rotate. The lead screw 945 drives the pressure plate 946 to slide within the adjusting housing 941 through the thread. Since the threads on the lead screw 945 are symmetrically arranged, the two pressure plates 946 will approach or move away from each other when they are displaced. When the pressure plates 946 approach each other, the adjusting spring 947 is compressed, and the elastic force applied to the adjusting carriage 944 increases. When the adjusting carriage 944 slides, it will drive the adjusting springs 947 on both sides to be compressed and stretched respectively. At this time, the elastic force that needs to be overcome when the adjusting carriage 944 slides up and down increases; when the pressure plates 946 move away from each other, the adjusting spring 947 in the compressed state gradually elongates and rebounds, and the elastic force applied to the adjusting carriage 944 decreases, and the elastic force that needs to be overcome when the adjusting carriage 944 slides up and down decreases. The control system realizes the purpose of adjusting the sliding resistance of the adjusting carriage 944 by adjusting the distance between the pressure plates 946.

[0062] When the secondary filter element 951 drives the rotating rod 952 to rotate, the rotating rod 952 will drive the second gear 954 to rotate. When the second gear 954 rotates, it drives the adjusting carriage 944 to slide within the adjusting housing 941 through the resistance teeth 9441. Since the adjusting carriage 944 is subject to the resistance of the adjusting spring 947, the secondary filter requires sufficient external force to overcome this resistance in order to produce a corresponding angular deflection. The smaller this resistance is, the easier it is for the secondary filter element 951 to deflect, and the higher the sensitivity is. The larger this resistance is, the more difficult it is for the secondary filter element 951 to deflect, and the lower the sensitivity is.

[0063] The external force received by the secondary filter element 951 is positively correlated with the filtration air velocity and the PM2.5 particle content in the air flow. The greater the filtration air velocity, the greater the deflection angle of the secondary filter element 951; the greater the PM2.5 particle content in the air flow, the stronger the impact on the secondary filter element 951, and the greater the deflection angle of the secondary filter element 951. In order to eliminate the influence factor of the filtration air velocity, the control system adjusts the sensitivity of the secondary filter element 951 according to the wind speed. The greater the wind speed, the lower the sensitivity, thereby offsetting the wind force effect, avoiding the influence of the wind speed on the detector 96, and increasing the detection accuracy of the detector 96 for the PM2.5 content.

[0064] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A PM2.5 bag filter with intelligent cleaning function, characterized in that: The bag filter comprises a box (1), one side of the box (1) is provided with an air inlet (2), the other side of the box (1) is provided with an air outlet (4), a pulse device (3) is installed on the box (1), a partition (7) is provided inside the box (1), a plurality of bag filter assemblies (6) are installed on the partition (7), a blow pipe (8) is installed on the partition (7), a plurality of nozzles are provided on the blow pipe (8), the positions of the nozzles correspond to the positions of the bag filter assemblies (6), the blow pipe (8) is connected to the pulse device (3), an ash hopper (5) is provided at the bottom end of the box (1), and a filter fan is provided at the top end of the box (1).

2. The PM2.5 bag filter with intelligent cleaning function according to claim 1, characterized in that: The bag filter assembly (6) comprises a secondary filter (9), the secondary filter (9) being mounted on a partition (7), a filter bag (61) being mounted at the bottom end of the secondary filter (9), a first telescopic hose (62) and a second telescopic hose (63) being mounted on the secondary filter (9), respectively, and a bag cage being arranged inside the filter bag (61).

3. The PM2.5 bag filter with intelligent cleaning function according to claim 2, characterized in that: The secondary filter (9) comprises a fixed cylinder (91), the fixed cylinder (91) being mounted on a partition (7), a sliding frame (92) being slidably mounted on the fixed cylinder (91), a first telescopic hose (62) and a second telescopic hose (63) being respectively mounted between the sliding frame (92) and the fixed cylinder (91), a plurality of secondary filter assemblies (95) being rotatably mounted on the fixed cylinder (91), the secondary filter assemblies (95) being meshed with the sliding frame (92) for transmission, a regulator (94) being mounted in the fixed cylinder (91), the secondary filter assemblies (95) being meshed with the regulator (94) for transmission, a detector (96) being mounted between the fixed frame and the sliding frame (92), and a vibration spring (93) being mounted between the fixed cylinder (91) and the sliding frame (92).

4. The PM2.5 bag filter with intelligent cleaning function according to claim 3, characterized in that: The regulator (94) comprises an adjusting shell (941), a connecting rod (942) is installed on the adjusting shell (941), one end of the connecting rod (942) is connected to the fixed cylinder (91), an adjusting motor (943) is installed in the adjusting shell (941), a screw rod (945) is installed on the output shaft of the adjusting motor (943), the screw rod (945) is provided with mutually symmetrical threads, a pressure plate (946) is symmetrically and slidably installed in the adjusting shell (941), the pressure plate (946) and the screw rod (945) are threadedly connected, an adjusting slide (944) is slidably installed in the adjusting shell (941), an adjusting spring (947) is installed between the adjusting slide (944) and the pressure plate (946), and the secondary filter assembly (95) passes through the adjusting shell (941) and is meshed with the adjusting slide (944) for transmission.

5. The PM2.5 bag filter with intelligent cleaning function according to claim 4, characterized in that: The secondary filter assembly (95) comprises a rotating rod (952), one end of which passes through the adjustment housing (941) and is provided with a second gear (954), the second gear (954) being meshed with the adjustment slide (944) for transmission, the other end of which passes through the fixed cylinder (91) and is provided with a first gear (953), the first gear (953) being meshed with the slide (92) for transmission, a secondary filter disc (951) being obliquely provided on the rotating rod (952), and a secondary filter screen being provided on the secondary filter disc (951).

6. The PM2.5 bag filter with intelligent cleaning function according to claim 5, characterized in that: The adjusting slide (944) is provided with a plurality of resistance teeth (9441), and the adjusting slide (944) is meshed with the second gear (954) for transmission via the resistance teeth (9441).

7. The PM2.5 bag filter with intelligent cleaning function according to claim 5, characterized in that: The sliding frame (92) is provided with sliding teeth (921), and the sliding frame (92) is meshed with the first gear (953) for transmission through the sliding teeth (921). A plurality of sliding rods (922) are provided at the bottom end of the sliding frame (92), and the sliding rods (922) penetrate the fixed cylinder (91) and are installed with a mounting ring (923). A filter bag (61) is installed on the mounting ring (923). A second telescopic hose (63) is installed between the bottom end of the fixed cylinder (91) and the mounting ring (923), and a first telescopic hose (62) is installed between the top end of the fixed cylinder (91) and the mounting ring (923).

8. The PM2.5 bag filter with intelligent cleaning function according to claim 3, characterized in that: The detector (96) comprises a detection rod (961) and a detection shell (962); the detection rod (961) is mounted on a fixed cylinder (91); the detection shell (962) is mounted on a sliding frame (92); a primary coil (963) is arranged inside the detection shell (962); secondary coils (964) are arranged at both ends of the primary coil (963); an iron core is arranged inside the detection rod (961); the detection rod (961) passes through the sliding frame (92); and the iron core is located inside the detection shell (962).

Images