A self-adjusting dust reduction device for municipal construction

Abstract

The present invention provides a self-adjusting dust reduction device for municipal construction, which relates to the field of bag filters. The self-adjusting dust reduction device for municipal construction includes a filtering component, an elastic member, and a pulse nozzle. The filtering component includes an outer filtering module and an inner filtering module. The outer filtering module includes a first support frame and an outer filter bag. A first air outlet is provided at the top of the first support frame, and the bottom of the first support frame is closed. The outer filter bag is sleeved on the outer periphery of the first support frame. The inner filtering module is disposed inside the first support frame and can slide up and down relative to the outer filtering module. The inner filtering module includes a second support frame and an inner filter bag. A first air inlet is provided at the bottom of the second support frame, and the inner filter bag is sleeved on the outer periphery of the second support frame. The elastic member is connected between the first support frame and the second support frame. The present invention can increase the filtering area of the filtering component without increasing the volume.

Description

Technical Field

[0001] The present invention relates to the technical field of bag filters, and particularly to a self-adjusting dust reduction device for municipal construction. Background Art

[0002] In related technologies, for a bag filter, the airflow with impurities passes through the cloth bag from bottom to top, and the cloth bag can filter the impurities in the airflow. The filtration efficiency of the bag filter is related to the filtration area of the cloth bag. If the filtration area of the cloth bag is to be increased, the length of the cloth bag can be increased, or the number of cloth bags can be increased, but this will increase the floor area of the bag filter.

[0003] It should be noted that the information disclosed in the background art part of the present invention is only intended to deepen the understanding of the general background art of the present invention, and should not be regarded as an admission or any form of suggestion that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0004] Based on this, it is necessary to provide a self-adjusting dust reduction device for municipal construction in view of the problems existing in the current bag filter.

[0005] The above object is achieved by the following technical solutions:

[0006] A self-adjusting dust reduction device for municipal construction, comprising:

[0007] A filtering component, including an outer filtering module and an inner filtering module. The outer filtering module includes a first support frame and an outer filter bag. A first air outlet is provided at the top of the first support frame, and the bottom of the first support frame is sealed. The outer filter bag is sleeved on the outer periphery of the first support frame. The inner filtering module passes through the first support frame and can slide up and down relative to the outer filtering module. A part of the structure of the inner filtering module extends out of the lower end of the first support frame. The inner filtering module includes a second support frame and an inner filter bag. A first air inlet is provided at the bottom of the second support frame. The inner filter bag is sleeved on the outer periphery of the second support frame and covers the top end of the second support frame;

[0008] An elastic member, connected between the first support frame and the second support frame to provide a restoring force in the up and down direction for the inner filtering module;

[0009] A pulse nozzle, located above the filtering component and arranged towards the first air outlet.

[0010] Preferably, the inner filtration module further includes an air guide cylinder, which is sleeved on the outer periphery of the inner filtration bag and fixedly connected to the second support frame. An air guide channel is formed between the air guide cylinder and the inner filtration bag. The air guide channel is communicated with the first air outlet, and the air guide cylinder is slidably connected to the first support frame.

[0011] Preferably, the air guide cylinder includes an air guide section. From bottom to top, the distance between the air guide section and the inner filtration bag gradually increases.

[0012] Preferably, the air guide cylinder further includes a straight pipe section connected to the air guide section. The straight pipe section is located below the air guide section, and the minimum distance between the straight pipe section and the inner filtration bag is less than or equal to the minimum distance between the air guide section and the inner filtration bag.

[0013] Preferably, along the up-and-down direction, the length of the inner filtration bag is greater than the length of the air guide cylinder, and the upper end of the inner filtration bag extends out of the air guide cylinder.

[0014] Preferably, the first support frame includes a first frame part and a bottom plate part. The bottom plate part is connected to the bottom of the first frame part. The outer filtration bag is sleeved on the outer periphery of the first frame part. The bottom plate part is provided with a through hole, and the air guide cylinder passes through the through hole.

[0015] Preferably, the second support frame includes a second frame part and a flange part. The flange part is connected to the bottom of the second frame part. The inner filtration bag covers the second frame part. The flange part is located below the bottom plate part, and the elastic member abuts between the bottom plate part and the flange part.

[0016] Preferably, the air guide cylinder is located above the flange part, and the bottom wall of the air guide cylinder is fixedly connected to the flange part through a fastener.

[0017] Preferably, the elastic member is arranged as a tension spring, and the tension spring is sleeved on the outer periphery of the air guide cylinder.

[0018] Preferably, the self-adjusting dust reduction device for municipal construction includes a bin body and a dust sending device. A second air inlet is provided on the side of the bin body, a second air outlet is provided on the top of the bin body, the bottom of the bin body is connected to the dust sending device, a flow guide plate is arranged in the bin body, the flow guide plate extends along the up-and-down direction, the flow guide plate divides the inner cavity of the bin body into a first cavity and a second cavity that are communicated with each other. The first cavity is communicated with the second air inlet, the second cavity is communicated with the second air outlet, the air flow in the second cavity flows from bottom to top, and the filtration assembly is arranged in the second cavity.

[0019] The beneficial effects of the present invention are:

[0020] 1. The self - adjusting dust - reducing device for municipal construction of the present invention, by setting an outer filtration module and an inner filtration module, with the inner filtration module passing through the first support frame of the inner filtration module, can make full use of the space inside the outer filtration module, so that the length of the filtration component is smaller, ensuring that the overall occupied space of the filtration component is smaller. Moreover, the inner filtration module includes an inner filtration bag, and the outer filtration module includes an outer filtration bag, which can increase the filtration area of the filtration component without increasing the volume, thereby improving the filtration efficiency;

[0021] 2. Since the inner filtration module can slide up and down relative to the outer filtration module, when there are more dust impurities accumulated on the inner filtration bag, the air flow is not easy to pass through the inner filtration bag, the air resistance of the inner filtration bag is large, and the inner filtration bag is impacted by the air flow and moves upward relative to the outer filtration bag. The position of the inner filtration bag is relatively more upward, making the inner filtration bag closer to the pulse nozzle above. During cleaning, the pulse nozzle directly sprays compressed air to clean the dust on the inner filtration bag, and the cleaning effect is good. When there are fewer dust impurities accumulated on the inner filtration bag, the air resistance of the inner filtration bag is small. Under the elastic force of the elastic member, the position of the inner filtration bag is relatively more downward, making the inner filtration bag away from the pulse nozzle. During cleaning, the pulse nozzle directly sprays compressed air, and the compressed air directly cleans the outer filtration bag, and the cleaning effect is good. It is possible to concentrate on cleaning the dust on the inner filtration bag or the outer filtration bag according to the amount of dust adsorbed on the inner filtration bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a three - dimensional structure diagram of the filtration component according to an embodiment of the present invention;

[0023] Figure 2 is a three - dimensional structure diagram of the filtration component according to an embodiment of the present invention;

[0024] Figure 3 is a front view of the filtration component according to an embodiment of the present invention;

[0025] Figure 4 is Figure 3 a cross - sectional view taken along line A - A in

[0026] Figure 5 is Figure 4 an enlarged view at B in

[0027] Figure 6 is a cross - sectional view of the filtration component according to an embodiment of the present invention;

[0028] Figure 7 is Figure 6 an enlarged view at C in

[0029] Figure 8 is a cross - sectional view of the filtration component according to an embodiment of the present invention;

[0030] Figure 9 Schematic three - dimensional structure diagram of the self - regulating dust - reducing device for municipal construction according to an embodiment of the present invention;

[0031] Figure 10 Cross - sectional view of the self - regulating dust - reducing device for municipal construction according to an embodiment of the present invention;

[0032] Figure 11 Cross - sectional view of the self - regulating dust - reducing device for municipal construction according to an embodiment of the present invention;

[0033] Figure 12 Schematic three - dimensional structure diagram of the self - regulating dust - reducing device for municipal construction according to an embodiment of the present invention;

[0034] Reference numerals:

[0035] 1000, self - regulating dust - reducing device for municipal construction;

[0036] 100, filtering component; 110, outer filtering module; 111, first support frame; 1111, first frame part; 1112, first support rod; 1113, bottom plate part; 1114, through hole; 1115, first air outlet; 112, outer filter bag; 120, inner filtering module; 121, second support frame; 1211, second frame part; 1212, second support rod; 1213, flange part; 1214, first air inlet; 122, inner filter bag; 123, air guide tube; 1231, air guide channel; 1232, air guide section; 1233, straight tube section; 1234, screw;

[0037] 200, elastic member;

[0038] 300, pulse component; 310, pulse nozzle;

[0039] 400, bin body; 410, first chamber; 420, second chamber; 430, flow - guiding plate; 440, second air inlet; 450, second air outlet; 460, collection hopper; 470, observation cover plate; 480, support plate;

[0040] 500, dust delivery device;

[0041] 2000, foundation pit air film. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the following further details the present invention through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The serial numbers assigned to the components in this text, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The terms "connection" and "coupling" as used in this invention, unless otherwise specifically stated, both include direct and indirect connection (coupling). In the description of this invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this invention.

[0044] In this invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0045] Refer to Figures 1 to 3 As shown, the filtration assembly 100 provided by an embodiment of this invention includes an outer filtration module 110 and an inner filtration module 120, wherein the inner filtration module 120 can slide up and down relative to the outer filtration module 110.

[0046] Refer to Figure 1 As shown, the outer filtration module 110 includes a first support frame 111 and an outer filtration bag 112. A first air outlet 1115 is provided at the top of the first support frame 111, and the first air outlet 1115 is used for the air flow to flow out of the filtration assembly 100. The bottom of the first support frame 111 is closed to prevent the air flow outside the first support frame 111 from bypassing the outer filtration bag 112 and directly entering the inside of the first support frame 111. The outer filtration bag 112 is sleeved on the outer periphery of the first support frame 111, and the outer filtration bag 112 does not cover the first air outlet 1115. The first support frame 111 spreads the outer filtration bag 112 to play a supporting role. It should be noted that many small filtration holes are provided in the outer filtration bag 112 for filtering impurities in the air flow.

[0047] Refer to Figure 4As shown in the figure, the inner filtration module 120 is disposed through the first support frame 111. The inner filtration module 120 can slide up and down relative to the outer filtration module 110. A part of the structure of the inner filtration module 120 extends out of the lower end of the first support frame 111. The inner filtration module 120 includes a second support frame 121 and an inner filtration bag 122. A first air inlet 1214 is provided at the bottom of the second support frame 121. The inner filtration bag 122 is sleeved on the outer periphery of the second support frame 121 and covers the top end of the second support frame 121 to prevent the air flow inside the second support frame 121 from bypassing the inner filtration bag 122 and directly reaching the outside of the second support frame 121. The second support frame 121 can slide up and down relative to the first support frame 111. It should be noted that the inner filtration bag 122 is provided with a plurality of small filtration holes for filtering dust impurities in the air flow.

[0048] Referring to Figure 9 and Figure 10 As shown in the figure, the self-adjusting dust reduction device 1000 for municipal construction provided by the embodiment of the present invention includes the filtration assembly 100 of the above embodiment.

[0049] Referring to Figure 4 、 Figure 9 、 Figure 10 and Figure 11 As shown in the figure, the self-adjusting dust reduction device 1000 for municipal construction of this embodiment further includes an elastic member 200 and a pulse assembly 300. The pulse assembly 300 is provided with a pulse nozzle 310. The elastic member 200 is connected between the first support frame 111 and the second support frame 121. The elastic member 200 is used to provide a restoring force in the up and down direction for the inner filtration module 120. When the inner filtration module 120 slides up and down, the position of the first support frame 111 remains fixed, and the second support frame 121 will compress the elastic member 200. The pulse nozzle 310 is disposed above the filtration assembly 100 and is oriented toward the first air outlet 1115. The pulse nozzle 310 can eject compressed air to clean the inner filtration bag 122 or the outer filtration bag 112.

[0050] When the self-adjusting dust reduction device 1000 for municipal construction of this embodiment is working, the air flow mainly follows the Figure 11 dashed arrow direction in the figure. The air flow mainly passes through the filtration assembly 100 from bottom to top. Specifically, the air flow follows the Figure 4The air flows in the direction of the dotted arrow in the figure and passes through the filter assembly 100, wherein a part of the air flow passes through the first air inlet 1214 from bottom to top and enters the interior of the second support frame 121, and then this part of the air flow passes through the filter holes of the inner filter bag 122, and the inner filter bag 122 filters out the dust impurities in the air flow, and the dust impurities are blocked on the inner periphery of the inner filter bag 122, and part of the dust impurities fall directly downward due to gravity, and pass through the first air inlet 1214 and fall to the bottom of the cabin, and the air flow filtered by the inner filter bag 122 enters between the inner filter bag 122 and the outer filter bag 112, and the air flow gradually rises, and finally flows out of the filter assembly 100 from the first air outlet 1115, and remains in the inner filter bag The dust and impurities on the inner periphery of 122 can be removed by the pulse nozzle 310; a part of the airflow outside the filter component 100 does not pass through the first air inlet 1214 during the rising process, but directly passes through the filter holes of the outer filter bag 112. The outer filter bag 112 can filter out the dust and impurities in the airflow, and the airflow filtered by the outer filter bag 112 enters between the outer filter bag 112 and the inner filter bag 122, and the airflow gradually rises and finally flows out of the filter component 100 from the first air outlet 1115. The dust and impurities are blocked on the outer periphery of the outer filter bag 112, and some of the dust and impurities fall directly downward due to gravity. The dust and impurities remaining on the outer periphery of the outer filter bag 112 can be removed by the pulse nozzle 310.

[0051] In this embodiment, the inner filter module 120 is inserted into the outer filter module 110, and part of the structure of the inner filter module 120 is located inside the outer filter module 110. This can make full use of the internal space of the outer filter module 110, ensure that the overall space occupied by the filter assembly 100 is small, and the length of the filter assembly 100 is small. In addition, the inner filter module 120 uses an inner filter bag 122 to filter the airflow, and the outer filter module 110 uses an outer filter bag 112 to filter the airflow. This can increase the filter area of ​​the filter assembly 100 without increasing the volume, thereby improving the filtration efficiency. In addition, when there are a lot of dust and impurities accumulated on the inner filter bag 122, it is not easy for the airflow to pass through the inner filter bag 122. The wind resistance of the inner filter bag 122 is large. The inner filter bag 122 is impacted by the airflow flowing from bottom to top and moves upward relative to the outer filter bag 112. At this time, the elastic member 200 is compressed, so that the position of the inner filter bag 122 is relatively higher, and the inner filter bag 122 rises to a position such as Figure 6 When the inner filter bag 122 is in the position of the pulse nozzle 310, the inner filter bag 122 can be closer to the upper pulse nozzle 310. When cleaning, the pulse nozzle 310 directly sprays compressed air to clean the dust on the inner filter bag 122, and the cleaning effect is better. When the dust and impurities accumulated in the inner filter bag 122 are less, the wind resistance of the inner filter bag 122 is smaller. Under the elastic force of the elastic member 200, the position of the inner filter bag 122 is relatively lower, so that the inner filter bag 122 is away from the pulse nozzle 310, and the inner filter bag 122 drops to the position of the pulse nozzle 310. Figure 4In the position, during cleaning, the pulse nozzle 310 directly sprays compressed air, and the compressed air directly cleans the dust on the outer filter bag 112. It can automatically concentrate on cleaning the dust on the inner filter bag 122 or the outer filter bag 112 according to the amount of dust adsorbed on the inner filter bag 122, and the cleaning effect is good.

[0052] Referring to Figures 9 to 11 As shown, according to some embodiments of the present invention, the self-adjusting dust reduction device 1000 for municipal construction further includes a bin body 400 and a dust discharging device 500. A second air inlet 440 is provided on the side of the bin body 400, a second air outlet 450 is provided on the top of the bin body 400, and the bottom of the bin body 400 is configured as a collecting hopper 460, which can collect dust impurities. The bottom of the bin body 400 is connected to the dust discharging device 500. A flow guiding plate 430 is provided in the bin body 400. The flow guiding plate 430 extends in the up and down direction. The flow guiding plate 430 divides the inner cavity of the bin body 400 into a first cavity 410 and a second cavity 420 that communicate with each other. The first cavity 410 communicates with the second air inlet 440, and the second cavity 420 communicates with the second air outlet 450. The filtering assembly 100 is arranged in the second cavity 420. A support plate 480 is provided in the second cavity 420, and the filtering assembly 100 is mounted on the support plate 480. The air flow in the first cavity 410 flows from top to bottom, and the air flow in the second cavity 420 flows from bottom to top. The flow direction of the air flow can be referred to Figure 11 the direction of the dotted arrow in. The outside air flow to be filtered enters the bin body 400 from the second air inlet 440. The air flow to be filtered is guided by the flow guiding plate 430 and bypasses to the bottom position of the bin body 400. The air flow to be filtered passes through the filtering assembly 100 from bottom to top. The filtering assembly 100 can filter the dust impurities in the air flow to be filtered, and the dust impurities directly fall downwards under the action of gravity to the dust discharging device 500.

[0053] Referring to Figure 12 As shown, the second air inlet 440 of the bin body 400 is connected to the foundation pit air film 2000, and the foundation pit air film 2000 is used to provide the air flow to be filtered to the second air inlet 440. Referring to Figure 9 As shown, the bin body 400 is provided with a transparent observation cover plate 470 for observing the internal condition of the bin body 400.

[0054] Referring to Figure 6 As shown, in some embodiments, the inner filtering module 120 further includes an air guiding cylinder 123. The air guiding cylinder 123 is sleeved on the outer periphery of the inner filter bag 122 and is fixedly connected to the second support frame 121. It can be understood that the air guiding cylinder 123 is arranged around the outer periphery of the inner filter bag 122. There is a distance between the air guiding cylinder 123 and the inner filter bag 122. An air guiding channel 1231 is formed between the air guiding cylinder 123 and the inner filter bag 122. The air guiding channel 1231 communicates with the first air outlet 1115, and the air guiding cylinder 123 is slidably connected to the first support frame 111.

[0055] In this embodiment, by providing an air guide tube 123, the air guide tube 123 can guide air. When there is a large amount of dust and impurities accumulated on the inner filter bag 122, under the action of air flow, the inner filter bag 122 rises to a position such as Figure 6 . At this time, the position of the air guide tube 123 is relatively high, and the air guide tube 123 is relatively close to the pulse nozzle 310. The air guide tube 123 can direct the gas ejected from the pulse nozzle 310 to the outer periphery of the inner filter bag 122. The gas ejected from the pulse nozzle 310 directly enters the air guide channel 1231 downward. After the compressed air is ejected from the pulse nozzle 310 at a very high speed, it will induce some of the surrounding air to be ejected onto the inner filter bag 122 in a very short time, so that the gas ejected from the pulse nozzle 310 can clean the inner filter bag 122, and the cleaning effect on the inner filter bag 122 is better. Since there is a large amount of dust and impurities accumulated on the inner filter bag 122, the cleaning requirement of the inner filter bag 122 is relatively large. By providing the air guide tube 123 to direct the gas to the inner filter bag 122, the cleaning efficiency can be improved. In addition, when the inner filter bag 122 rises to a position such as Figure 6 , the position of the air guide tube 123 is relatively high. At this time, since the air guide tube 123 is located between the inner filter bag 122 and the outer filter bag 112, the air guide tube 123 can play the role of blocking dust and air flow. It can also be understood that the air guide tube 123 guides the gas ejected from the pulse nozzle 310 into the air guide channel 1231, so that the gas ejected from the pulse nozzle 310 will not directly blow onto the outer filter bag 112. During the process of cleaning the inner filter bag 122, the dust and garbage of the inner filter bag 122 and the outer filter bag 112 will not cross-contaminate each other.

[0056] Referring to Figure 6 , according to some embodiments of the present invention, the air guide tube 123 includes a wind guiding section 1232. From bottom to top, the distance between the wind guiding section 1232 and the inner filter bag 122 gradually increases. It can be understood that the wind guiding section 1232 is a conical structure, and the wind guiding section 1232 gradually expands from bottom to top, and has a good wind guiding and wind gathering effect, and can better guide the gas ejected from the pulse nozzle 310 between the air guide tube 123 and the inner filter bag 122.

[0057] Referring to Figure 6 , according to some embodiments of the present invention, the air guide tube 123 further includes a straight tube section 1233 connected to the wind guiding section 1232. The straight tube section 1233 is located below the wind guiding section 1232, and the minimum distance between the straight tube section 1233 and the inner filter bag 122 is less than or equal to the minimum distance between the wind guiding section 1232 and the inner filter bag 122. It can also be understood that the distance between the straight tube section 1233 and the inner filter bag 122 remains unchanged. Such a setting can reduce the width of the air guide tube 123 and reduce the occupied space.

[0058] Referring to Figure 6As shown, according to some embodiments of the present invention, along the up and down direction, the length of the inner filter bag 122 is greater than that of the air guide cylinder 123, and the upper end of the inner filter bag 122 extends out of the air guide cylinder 123. Such a setting can facilitate the outflow of air from the inner filter bag 122, prevent the air guide cylinder 123 from completely blocking the inner filter bag 122, and is beneficial to the flow of the filtered air.

[0059] Referring to Figure 4 and Figure 7 As shown, according to some embodiments of the present invention, the first support frame 111 includes a first frame portion 1111 and a bottom plate portion 1113. The first frame portion 1111 includes a plurality of first support rods 1112 extending in the up and down direction, forming a frame structure, and the plurality of first support rods 1112 are spaced apart in the circumferential direction. The outer filter bag 112 is sleeved on the outer periphery of the first frame portion 1111, and the outer filter bag 112 is supported by the plurality of first support rods 1112. The bottom plate portion 1113 is horizontally arranged, the bottom plate portion 1113 is connected to the bottom of the first frame portion 1111, and the bottom plate portion 1113 is provided with a through hole 1114, and the air guide cylinder 123 is passed through the through hole 1114.

[0060] Referring to Figure 7 and Figure 8 As shown, according to some embodiments of the present invention, the second support frame 121 includes a second frame portion 1211 and a flange portion 1213. The second frame portion 1211 includes a plurality of second support rods 1212 extending in the up and down direction, and the plurality of second support rods 1212 are spaced apart in the circumferential direction, thereby forming a frame structure. The inner filter bag 122 is covered on the second frame portion 1211, and the plurality of second support rods 1212 support the inner filter bag 122. The flange portion 1213 is a ring structure, the maximum outer diameter of the flange portion 1213 is greater than the outer diameter of the second frame portion 1211, the flange portion 1213 is connected to the bottom of the second frame portion 1211, the flange portion 1213 is located below the bottom plate portion 1113, and the elastic member 200 abuts between the bottom plate portion 1113 and the flange portion 1213.

[0061] Referring to Figure 5 As shown, according to some embodiments of the present invention, the air guide cylinder 123 is located above the flange portion 1213, the flange portion 1213 plays a supporting role for the air guide cylinder 123, and the bottom wall of the air guide cylinder 123 and the flange portion 1213 are fixedly connected by screws 1234.

[0062] Referring to Figure 4 As shown, according to some embodiments of the present invention, the elastic member 200 is set as a spring, the spring is sleeved on the outer periphery of the air guide cylinder 123, and the air guide cylinder 123 can play a limiting role for the spring to prevent the spring from falling off.

[0063] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0064] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A self-regulating dust suppression device (1000) for municipal construction, characterized in that: include: A filter assembly (100) comprises an external filter module (110) and an internal filter module (120), wherein the external filter module (110) comprises a first support frame (111) and an external filter bag (112), wherein the top of the first support frame (111) is provided with a first air outlet (1115), the bottom of the first support frame (111) is closed, the external filter bag (112) is sleeved on the outer periphery of the first support frame (111), and the internal filter module (120) is inserted into the first support frame (111). ) and can slide up and down relative to the outer filter module (110), a part of the structure of the inner filter module (120) extends out of the lower end of the first support frame (111), the inner filter module (120) comprises a second support frame (121) and an inner filter bag (122), a first air inlet (1214) is provided at the bottom of the second support frame (121), and the inner filter bag (122) is sleeved on the outer periphery of the second support frame (121) and covers the top end of the second support frame (121); An elastic member (200) connected between the first support frame (111) and the second support frame (121) to provide a restoring force in an up-down direction to the inner filter module (120); The pulse nozzle (310) is located above the filter assembly (100) and is arranged toward the first air outlet (1115). The inner filter module (120) also includes an air guide tube (123). The air guide tube (123) is sleeved on the outer periphery of the inner filter bag (122) and is fixedly connected to the second support frame (121). An air guide channel (1231) is formed between the air guide tube (123) and the inner filter bag (122). The air guide channel (1231) is connected to the first air outlet (1115). The air guide tube (123) is slidably connected to the first support frame (111). The air guide tube (123) includes an air guide section (1232). From bottom to top, the distance between the air guide section (1232) and the inner filter bag (122) gradually increases.

2. The self-regulating dust suppression device (1000) for municipal construction according to claim 1 is characterized in that: The air guide tube (123) further comprises a straight pipe section (1233) connected to the air guide section (1232); the straight pipe section (1233) is located below the air guide section (1232); and the minimum distance between the straight pipe section (1233) and the inner filter bag (122) is less than or equal to the minimum distance between the air guide section (1232) and the inner filter bag (122).

3. The self-regulating dust suppression device (1000) for municipal construction according to claim 1, characterized in that: Along the up-down direction, the length of the inner filter bag (122) is greater than the length of the air guide tube (123), and the upper end of the inner filter bag (122) extends out of the air guide tube (123).

4. The self-regulating dust suppression device (1000) for municipal construction according to claim 1, characterized in that: The first support frame (111) comprises a first frame body portion (1111) and a bottom plate portion (1113); the bottom plate portion (1113) is connected to the bottom of the first frame body portion (1111); the outer filter bag (112) is sleeved on the outer periphery of the first frame body portion (1111); the bottom plate portion (1113) is provided with a through hole (1114); and the air guide tube (123) is passed through the through hole (1114).

5. The self-regulating dust suppression device (1000) for municipal construction according to claim 4 is characterized in that: The second support frame (121) comprises a second frame body (1211) and a flange portion (1213), wherein the flange portion (1213) is connected to the bottom of the second frame body (1211), the inner filter bag (122) is covered on the second frame body (1211), the flange portion (1213) is located below the bottom plate portion (1113), and the elastic member (200) is abutted between the bottom plate portion (1113) and the flange portion (1213).

6. The self-regulating dust suppression device (1000) for municipal construction according to claim 5, characterized in that: The air guide tube (123) is located above the flange portion (1213), and the bottom wall of the air guide tube (123) is fixedly connected to the flange portion (1213) via a fastener.

7. The self-regulating dust suppression device (1000) for municipal construction according to claim 1, characterized in that: The elastic member (200) is configured as a tension spring, and the tension spring is sleeved on the outer circumference of the air guide tube (123).

8. The self-regulating dust suppression device (1000) for municipal construction according to claim 1, characterized in that: The self-regulating dust suppression device (1000) for municipal construction further comprises a silo (400) and a dust delivery device (500); a second air inlet (440) is provided on the side of the silo (400); a second air outlet (450) is provided on the top of the silo (400); the bottom of the silo (400) is connected to the dust delivery device (500); a guide plate (430) is provided inside the silo (400); the guide plate (430) is extended in the up-down direction; the guide plate (430) divides the inner cavity of the silo (400) into a first cavity (410) and a second cavity (420) which are connected to each other; the first cavity (410) is connected to the second air inlet (440); the second cavity (420) is connected to the second air outlet (450); the airflow in the second cavity (420) flows from bottom to top; and the filter assembly (100) is arranged in the second cavity (420).

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