Efficient dust removal device of five-constant system

Abstract

The utility model belongs to the technical field of five-constant systems, and particularly relates to a five-constant system efficient dust removal device which comprises a hollow cylinder, first round holes are formed in the left side and the right side of the hollow cylinder, and dust removal mechanisms are fixedly connected to the inner walls of the first round holes and the inner wall of the hollow cylinder. And the surface of the dust removal mechanism and the inner wall of the hollow cylinder are fixedly connected with lower sealing plates. According to the efficient dust removal device of the five-constant system, the two independent dust removal mechanisms are arranged in the hollow cylinder, and the pipeline is switched, so that one dust removal mechanism can be automatically switched to the other dust removal mechanism after dust removal for a period of time; according to the dust removal device, dust adsorbed on the filter cartridge can be automatically swept down through the sweeping mechanism, so that the dust removal efficiency cannot be reduced due to the fact that more dust is adsorbed on the filter cartridge when the dust removal device is used for removing dust for a long time, and the dust removal device can efficiently remove dust for a long time.

Description

TECHNICAL FIELD

[0001] The utility model belongs to five constant system technical field, concretely relates to a five constant system high -efficient dust collector. BACKGROUND

[0002] Five constant system passes through the building temperature regulation and the air conditioning system control indoor temperature, humidity and air cleanliness, keeps indoor constant temperature, constant humidity, constant oxygen, constant clean and constant static effect. Specifically speaking is combined ground heating, central air conditioning, fresh air system, humidification, dehumidification as a whole set of equipment, aiming at the real -time change of various indoor factors, central climate synthesizer carries out real -time regulation control to indoor temperature, humidity, air quality, air flow etc., realizes constant temperature, constant humidity, constant oxygen, constant clean, constant static in different seasons, region, time, space and no wind, no dust, no bacteria, no noise, physiological comfort degree highly unified human indoor climate space.

[0003] At present, the dust collector in five constant system, most of the air is extracted to the dust collector through the axial flow fan on the dust collector, and the dust in the air is filtered out through the filter screen in the dust collector, but in the dust removal process, because the dust will be adsorbed on the filter screen, and block the filter hole on the filter screen, and then lead to the dust removal efficiency of the dust collector will be reduced due to the amount of dust adsorbed on the filter screen when long time dust removal. UTILITY MODEL CONTENTS

[0004] The utility model discloses a five constant system high -efficient dust collector, solved in the dust removal process, because the dust will be adsorbed on the filter screen, and block the filter hole on the filter screen, and then lead to the dust removal efficiency of the dust collector will be reduced due to the amount of dust adsorbed on the filter screen when long time dust removal problem.

[0005] The utility model adopts the technical scheme as follows:

[0006] A five constant system high -efficient dust collector, including the hollow cylinder, the left and right sides of the hollow cylinder are all set up with the first circular hole, the inner wall of the first circular hole and the inner wall of the hollow cylinder are all fixedly connected with dust removal mechanism, the surface of dust removal mechanism and the inner wall of the hollow cylinder are all fixedly connected with lower sealing plate, the upper surface of dust removal mechanism and the upper surface of the hollow cylinder are all fixedly connected with upper sealing plate, the front of the hollow cylinder is set up with the second circular hole, the inner wall of the second circular hole is fixedly connected with the axial flow fan, the upper surface of the upper sealing plate is set up with the third circular hole, the upper surface of the upper sealing plate is set up with the fourth circular hole, the inner wall of the third circular hole and the inner wall of the fourth circular hole are all fixedly connected with switching pipeline, the upper surface of the upper sealing plate is set up with the fifth circular hole, the upper surface of the upper sealing plate is fixedly connected with cleaning mechanism, the inner wall of dust removal mechanism and the inner wall of the fifth circular hole are all with the surface of cleaning mechanism, the bottom of dust removal mechanism is fixedly connected with stand, the bottom of stand is fixedly connected with bottom plate.

[0007] The utility model further provides for, the dust removal mechanism includes round tub, first dust removal pipe, first electromagnetic valve, hollow conical plate, second dust removal pipe, second electromagnetic valve, filter cartridge and air outlet pipe, the inner wall of hollow cylinder, the left and right sides of lower sealing plate and the bottom of upper sealing plate all are fixedly connected with the surface of round tub, the bottom of round tub is fixedly communicated with the top of first dust removal pipe, the bottom of first dust removal pipe is fixedly communicated with the top of first electromagnetic valve, the inner wall of round tub is fixedly connected with the surface of hollow conical plate, the inner wall of hollow conical plate is fixedly connected with the surface of second dust removal pipe, the bottom of second dust removal pipe is fixedly communicated with the top of second electromagnetic valve, the upper and lower sides of filter cartridge are fixedly connected with the upper surface of hollow conical plate and the bottom of upper sealing plate respectively, the inner wall of filter cartridge is attached with the surface of cleaning mechanism, the side of round tub is fixedly communicated with one end of air outlet pipe, the surface of air outlet pipe is fixedly connected with the inner wall of first circular hole.

[0008] The utility model further provides for, the switching pipeline includes tee, third electromagnetic valve and elbow, the bottom of tee is fixedly connected with the inner wall of third circular hole, the left and right ends of tee all are fixedly connected with one end of third electromagnetic valve, the both ends of elbow are fixedly connected with the other end of third electromagnetic valve and the inner wall of fourth circular hole respectively.

[0009] The utility model further provides for, the cleaning mechanism includes U-shaped board, electric telescopic link, slide column, connecting column and annular scraper, the bottom of U-shaped board is fixedly connected with the upper surface of upper sealing plate, the upper and lower sides of electric telescopic link are fixedly connected with the inner wall of U-shaped board and the top of slide column respectively, the surface of slide column is attached with the inner wall of fifth circular hole, the front and rear ends of slide column all are fixedly connected with one end of connecting column, the other end of connecting column is fixedly connected with the inner wall of annular scraper, the surface of annular scraper is attached with the inner wall of filter cartridge.

[0010] The utility model further provides for, the bottom of first electromagnetic valve is fixedly communicated with third dust removal pipe, the surface of third dust removal pipe is attached with the receiving bag, the surface of receiving bag is bonded with elastic metal ring, the left and right sides of elastic metal ring all are fixedly connected with handle.

[0011] The utility model further provides for, the surface of third dust removal pipe is fixedly connected with limit ring, the bottom of limit ring is attached with the upper surface of elastic metal ring.

[0012] The utility model discloses technical effects obtained for:

[0013] The utility model discloses a five constant system high -efficient dust collector through setting up two independent dust removal mechanism in hollow cylinder, and through switching pipeline, one of dust removal mechanism can be switched another dust removal mechanism automatically after a period of dust removal, simultaneously, when not carrying out dust removal, through the cleaning mechanism can automatically clean the dust adhered on the filter cylinder down, and through second dust exhaust pipe and second electromagnetic valve, the dust is accumulated under the hollow conical plate, and then guarantee that the dust removal efficiency of the dust collector does not reduce because of the more dust adhered on the filter cylinder when long -time dust removal, thereby making the dust collector can long -time high -efficient dust removal.

[0014] The utility model discloses a five constant system high -efficient dust collector sets up the elastic metal ring on the storage bag, makes the bag mouth of storage bag after the bag mouth of storage bag can be contacted with third dust exhaust pipe, and then makes the dust in dust removal mechanism when entering the storage bag through third dust exhaust pipe, does not have dust to float to the air, and simultaneously, when the bag mouth of storage bag is separated with third dust exhaust pipe, through the elastic metal ring, makes the bag mouth of storage bag can be closed automatically, and then makes the dust in storage bag not float to the air. DRAWINGS

[0015] Figure 1 It is the three -dimensional schematic view of the structure of the utility model;

[0016] Figure 2 It is the left view of the structure of the utility model;

[0017] Figure 3 It is Figure 2 the section view of A-A place in;

[0018] Figure 4 It is Figure 3 the enlarged view of B place in;

[0019] Figure 5 It is Figure 3 the section view of C-C place in;

[0020] Figure 6 It is the front view of the structure of the utility model;

[0021] Figure 7 It is the three -dimensional schematic view of hollow cylinder in the utility model;

[0022] Figure 8 It is the side view of dust removal mechanism in the utility model;

[0023] Figure 9 It is Figure 8 the section view of D-D place in;

[0024] Figure 10 It is the plan view of lower sealing plate in the utility model;

[0025] Figure 11 is the top view of the upper sealing plate in the utility model;

[0026] Figure 12 is the front view of the cleaning mechanism in the utility model;

[0027] Figure 13 is Figure 12 the section view at E-E in the utility model;

[0028] Figure 14 is the top view of the annular scraper in the utility model;

[0029] Figure 15 is the top view of the storage bag when the storage bag is sleeved on the third dust removal pipe in the utility model;

[0030] Figure 16 is the top view of the storage bag after the storage bag is separated from the third dust removal pipe in the utility model.

[0031] In the drawings, the component list represented by each reference numeral is as follows:

[0032] 1, hollow cylinder; 2, first circular hole; 3, dust removal mechanism; 31, barrel; 32, first dust removal pipe; 33, first electromagnetic valve; 34, hollow conical plate; 35, second dust removal pipe; 36, second electromagnetic valve; 37, filter cylinder; 38, air outlet pipe; 4, lower sealing plate; 5, upper sealing plate; 6, second circular hole; 7, axial flow fan; 8, third circular hole; 9, fourth circular hole; 10, switching pipeline; 101, three-way pipe; 102, third electromagnetic valve; 103, elbow; 11, fifth circular hole; 12, cleaning mechanism; 121, U-shaped plate; 122, electric telescopic rod; 123, sliding column; 124, connecting column; 125, annular scraper; 13, stand column; 14, bottom plate; 15, third dust removal pipe; 16, storage bag; 17, elastic metal ring; 18, handle; 19, limiting ring. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model are described in detail below in conjunction with the drawings of the specification.

[0034] In the following description, a lot of specific details are set forth in order to give a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from the description herein, and those skilled in the art can make similar generalization without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.

[0035] As Figures 1 to 14As shown, a kind of five constant system high-efficiency dust removal device, including hollow cylinder 1, the left and right sides of hollow cylinder 1 are all set with first round hole 2, the inner wall of first round hole 2 and the inner wall of hollow cylinder 1 are all fixedly connected with dust removal mechanism 3, the surface of dust removal mechanism 3 and the inner wall of hollow cylinder 1 are all fixedly connected with lower sealing plate 4, the upper surface of dust removal mechanism 3 and the upper surface of hollow cylinder 1 are all fixedly connected with upper sealing plate 5, the front of hollow cylinder 1 is set with second round hole 6, the inner wall of second round hole 6 is fixedly connected with axial fan 7, the upper surface of upper sealing plate 5 is set with third round hole 8, the upper surface of upper sealing plate 5 is set with fourth round hole 9, the inner wall of third round hole 8 and the inner wall of fourth round hole 9 are all fixedly connected with switching pipeline 10, the upper surface of upper sealing plate 5 is set with fifth round hole 11, the upper surface of upper sealing plate 5 is fixedly connected with cleaning mechanism 12, the inner wall of dust removal mechanism 3 and the inner wall of fifth round hole 11 are all attached to the surface of cleaning mechanism 12, the bottom of dust removal mechanism 3 is fixedly connected with stand 13, the bottom of stand 13 is fixedly connected with bottom plate 14.

[0036] Among them, dust removal mechanism 3 includes barrel 31, first dust removal pipe 32, first electromagnetic valve 33, hollow conical plate 34, second dust removal pipe 35, second electromagnetic valve 36, filter cartridge 37 and gas outlet pipe 38, the inner wall of hollow cylinder 1, the left and right sides of lower sealing plate 4 and the bottom of upper sealing plate 5 are all fixedly connected with the surface of barrel 31, the bottom of barrel 31 is fixedly communicated with the top end of first dust removal pipe 32, the bottom end of first dust removal pipe 32 is fixedly communicated with the top end of first electromagnetic valve 33, the inner wall of barrel 31 is fixedly connected with the surface of hollow conical plate 34, the inner wall of hollow conical plate 34 is fixedly connected with the surface of second dust removal pipe 35, the bottom end of second dust removal pipe 35 is fixedly communicated with the top end of second electromagnetic valve 36, the upper and lower sides of filter cartridge 37 are respectively fixedly connected with the bottom of upper sealing plate 5 and the upper surface of hollow conical plate 34, the inner wall of filter cartridge 37 is attached to the surface of cleaning mechanism 12, the side of barrel 31 is fixedly communicated with one end of gas outlet pipe 38, the surface of gas outlet pipe 38 is fixedly connected with the inner wall of first round hole 2.

[0037] Switching pipeline 10 includes tee 101, third electromagnetic valve 102 and elbow 103, the bottom end of tee 101 is fixedly connected with the inner wall of third round hole 8, the left and right ends of tee 101 are all fixedly connected with one end of third electromagnetic valve 102, the two ends of elbow 103 are respectively fixedly connected with the other end of third electromagnetic valve 102 and the inner wall of fourth round hole 9.

[0038] The cleaning mechanism 12 comprises a U-shaped plate 121, an electric telescopic rod 122, a sliding column 123, a connecting column 124 and an annular scraper 125, the bottom of the U-shaped plate 121 is fixedly connected with the upper surface of the upper sealing plate 5, the upper and lower sides of the electric telescopic rod 122 are fixedly connected with the inner wall of the U-shaped plate 121 and the top end of the sliding column 123 respectively, the surface of the sliding column 123 is in close contact with the inner wall of the fifth circular hole 11, the front and rear ends of the sliding column 123 are fixedly connected with one end of the connecting column 124, the other end of the connecting column 124 is fixedly connected with the inner wall of the annular scraper 125, and the surface of the annular scraper 125 is in close contact with the inner wall of the filter cylinder 37.

[0039] It should be noted that the third electromagnetic valve 102 controls the on-off between the three-way pipe 101 and the elbow pipe 103, when the third electromagnetic valve 102 on the left side of the three-way pipe 101 is opened and the third electromagnetic valve 102 on the right side of the three-way pipe 101 is closed, the air outside the hollow cylinder 1 is sucked into the left dust removal mechanism 3 through the axial flow fan 7, and the dust in the air is filtered by the filter cylinder 37 in the left dust removal mechanism 3, and the filtered air is discharged through the left air outlet pipe 38, when the third electromagnetic valve 102 on the right side of the three-way pipe 101 is opened and the third electromagnetic valve 102 on the left side of the three-way pipe 101 is closed, the air outside the hollow cylinder 1 is sucked into the right dust removal mechanism 3 through the axial flow fan 7, and the dust in the air is filtered by the filter cylinder 37 in the right dust removal mechanism 3, and the filtered air is discharged through the right air outlet pipe 38, at the same time, when the electric telescopic rod 122 controls the annular scraper 125 to move downward, the dust adsorbed on the filter cylinder 37 is scraped off by the annular scraper 125, when the second electromagnetic valve 36 is opened, the dust above the hollow conical plate 34 enters below the hollow conical plate 34 through the second dust removal pipe 35, when the second electromagnetic valve 36 is closed, the dust is separated from the filter cylinder 37 through the hollow conical plate 34, the second dust removal pipe 35 and the second electromagnetic valve 36, when the first electromagnetic valve 33 is opened, the dust in the circular barrel 31 is discharged through the first dust removal pipe 32.

[0040] As shown in Figures 1 to 16 The bottom end of the first electromagnetic valve 33 is fixedly connected with the third dust removal pipe 15, the surface of the third dust removal pipe 15 is in close contact with the receiving bag 16, the surface of the receiving bag 16 is bonded with the elastic metal ring 17, the left and right sides of the elastic metal ring 17 are fixedly connected with the handle 18, and the user can pull the elastic metal ring 17 more conveniently through the handle 18.

[0041] The surface of the third dust removal pipe 15 is fixedly connected with the limiting ring 19, and the bottom of the limiting ring 19 is in close contact with the upper surface of the elastic metal ring 17.

[0042] It should be noted that by setting the elastic metal ring 17 on the storage bag 16, the bag opening of the storage bag 16 can be in contact with the third dust exhaust pipe 15 after the bag opening of the storage bag 16 is sleeved on the third dust exhaust pipe 15, so that the dust in the dust removal mechanism 3 will not float into the air when the dust enters the storage bag 16 through the third dust exhaust pipe 15, and when the bag opening of the storage bag 16 is separated from the third dust exhaust pipe 15, the bag opening of the storage bag 16 can be automatically closed through the elastic metal ring 17, so that the dust in the storage bag 16 will not float into the air.

[0043] The working principle of the utility model is: first, the annular scraper 125 is lifted to the highest point through the electric telescopic rod 122, and the first electromagnetic valve 33 and the second electromagnetic valve 36 are closed, then the third electromagnetic valve 102 on the left side of the three-way pipe 101 is opened, the third electromagnetic valve 102 on the left side of the three-way pipe 101 is closed, and simultaneously, the axial flow fan 7 is opened, at this time, through the axial flow fan 7, the air outside the hollow cylinder 1 is sucked into the left dust removal mechanism 3, and the filter cylinder 37 in the left dust removal mechanism 3 filters the dust in the air, and the filtered air is discharged through the left air outlet pipe 38.

[0044] When the left dust removal mechanism 3 is dusted for a period of time, the third electromagnetic valve 102 on the right side of the three-way pipe 101 is opened, the third electromagnetic valve 102 on the left side of the three-way pipe 101 is closed, at this time, through the axial flow fan 7, the air outside the hollow cylinder 1 is sucked into the right dust removal mechanism 3, and the filter cylinder 37 in the right dust removal mechanism 3 filters the dust in the air, and the filtered air is discharged through the right air outlet pipe 38.

[0045] At the same time, the annular scraper 125 is moved downward through the electric telescopic rod 122 above the left dust removal mechanism 3, and the second electromagnetic valve 36 in the left dust removal mechanism 3 is opened, at this time, the dust adsorbed on the filter cylinder 37 is scraped down through the annular scraper 125, and the dust enters the hollow conical plate 34 below through the second dust exhaust pipe 35, when the annular scraper 125 descends to the lowest point, the annular scraper 125 is returned to the highest position through the electric telescopic rod 122, and the second electromagnetic valve 36 is closed.

[0046] When the left dust removal mechanism 3 is dusted for a period of time, the third electromagnetic valve 102 on the right side of the three-way pipe 101 is opened, the third electromagnetic valve 102 on the left side of the three-way pipe 101 is closed, at this time, through the axial flow fan 7, the air outside the hollow cylinder 1 is sucked into the left dust removal mechanism 3, and the filter cylinder 37 in the left dust removal mechanism 3 filters the dust in the air, and the filtered air is discharged through the left air outlet pipe 38.

[0047] Meanwhile, the annular scraper 125 is moved downward by the electric telescopic rod 122 above the right dust removal mechanism 3, and the second electromagnetic valve 36 in the right dust removal mechanism 3 is opened, at this time, the dust adsorbed on the filter cartridge 37 is scraped down by the annular scraper 125, and the dust enters the hollow conical plate 34 below through the second dust removal pipe 35, when the annular scraper 125 drops to the lowest point, the annular scraper 125 is returned to the highest position by the electric telescopic rod 122, and the second electromagnetic valve 36 is closed.

[0048] When the dust in the barrel 31 needs to be discharged, the bag opening of the storage bag 16 is sleeved on the third dust removal pipe 15, then the first electromagnetic valve 33 is opened, the dust in the barrel 31 falls into the storage bag 16 through the third dust removal pipe 15, when the dust in the barrel 31 is discharged, the first electromagnetic valve 33 is closed, and the bag opening of the storage bag 16 is separated from the third dust removal pipe 15.

[0049] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application. The structure, device and operation method not specifically described and explained in the present application, if no special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A high-efficiency dust removal device for a five-constant system, characterized by: Including the hollow cylinder (1), the left and right sides of the hollow cylinder (1) are provided with the first circular hole (2), the inner wall of the first circular hole (2) and the inner wall of the hollow cylinder (1) are fixedly connected with the dust removal mechanism (3), the surface of the dust removal mechanism (3) and the inner wall of the hollow cylinder (1) are fixedly connected with the lower sealing plate (4), the upper surface of the dust removal mechanism (3) and the upper surface of the hollow cylinder (1) are fixedly connected with the upper sealing plate (5), the front of the hollow cylinder (1) is provided with the second circular hole (6), the inner wall of the second circular hole (6) is fixedly connected with the axial flow fan (7), the upper surface of the upper sealing plate (5) is provided with the third circular hole (8), the upper surface of the upper sealing plate (5) is provided with the fourth circular hole (9), the inner wall of the third circular hole (8) and the inner wall of the fourth circular hole (9) are fixedly connected with the switching pipeline (10), the upper surface of the upper sealing plate (5) is provided with the fifth circular hole (11), the upper surface of the upper sealing plate (5) is fixedly connected with the cleaning mechanism (12), the inner wall of the dust removal mechanism (3) and the inner wall of the fifth circular hole (11) are in close contact with the surface of the cleaning mechanism (12), the bottom of the dust removal mechanism (3) is fixedly connected with the stand (13), and the bottom of the stand (13) is fixedly connected with the bottom plate (14).

2. The high-efficiency dust removal device of a five-constant system according to claim 1, characterized in that: The dust removal mechanism (3) includes a barrel (31), a first dust removal pipe (32), a first electromagnetic valve (33), a hollow conical plate (34), a second dust removal pipe (35), a second electromagnetic valve (36), a filter cylinder (37) and an air outlet pipe (38), the inner wall of the hollow cylinder (1), the left and right sides of the lower sealing plate (4) and the bottom of the upper sealing plate (5) are fixedly connected with the surface of the barrel (31), the bottom of the barrel (31) is fixedly communicated with the top end of the first dust removal pipe (32), the bottom end of the first dust removal pipe (32) is fixedly communicated with the top end of the first electromagnetic valve (33), the inner wall of the barrel (31) is fixedly connected with the surface of the hollow conical plate (34), the inner wall of the hollow conical plate (34) is fixedly connected with the surface of the second dust removal pipe (35), the bottom end of the second dust removal pipe (35) is fixedly communicated with the top end of the second electromagnetic valve (36), the upper and lower sides of the filter cylinder (37) are fixedly connected with the upper surface of the hollow conical plate (34) and the bottom of the upper sealing plate (5) respectively, the inner wall of the filter cylinder (37) is in close contact with the surface of the cleaning mechanism (12), the side surface of the barrel (31) is fixedly communicated with one end of the air outlet pipe (38), and the surface of the air outlet pipe (38) is fixedly connected with the inner wall of the first circular hole (2).

3. The high-efficiency dust removal device of a five-constant system according to claim 1, characterized in that: The switching pipeline (10) includes a tee pipe (101), a third electromagnetic valve (102) and an elbow pipe (103), the bottom end of the tee pipe (101) is fixedly connected with the inner wall of the third circular hole (8), the left and right ends of the tee pipe (101) are fixedly connected with one end of the third electromagnetic valve (102), and the two ends of the elbow pipe (103) are fixedly connected with the other end of the third electromagnetic valve (102) and the inner wall of the fourth circular hole (9) respectively.

4. The high-efficiency dust removal device of a five-constant system according to claim 2, characterized in that: The cleaning mechanism (12) comprises a U-shaped plate (121), an electric telescopic rod (122), a sliding column (123), a connecting column (124) and an annular scraper (125), the bottom of the U-shaped plate (121) is fixedly connected with the upper surface of the upper sealing plate (5), the upper and lower sides of the electric telescopic rod (122) are fixedly connected with the inner wall of the U-shaped plate (121) and the top end of the sliding column (123) respectively, the surface of the sliding column (123) is attached to the inner wall of the fifth circular hole (11), the front and rear ends of the sliding column (123) are fixedly connected with one end of the connecting column (124), the other end of the connecting column (124) is fixedly connected with the inner wall of the annular scraper (125), and the surface of the annular scraper (125) is attached to the inner wall of the filter cartridge (37).

5. The high-efficiency dust removal device of a five-constant system according to claim 2, characterized in that: The bottom end of the first electromagnetic valve (33) is fixedly connected with a third dust removal pipe (15), the surface of the third dust removal pipe (15) is attached with a storage bag (16), the surface of the storage bag (16) is attached with an elastic metal ring (17), and the left and right sides of the elastic metal ring (17) are fixedly connected with handles (18).

6. The high-efficiency dust removal device of a five-constant system according to claim 5, characterized in that: The surface of the third dust removal pipe (15) is fixedly connected with a limiting ring (19), and the bottom of the limiting ring (19) is attached to the upper surface of the elastic metal ring (17).

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