An environmentally friendly building dispersed dust treatment equipment

Abstract

The present invention discloses an environmentally friendly building diffuse dust treatment equipment, including a dust collecting pipe and a filter part inside thereof, wherein the upper and lower sides of the dust collecting pipe are respectively provided with an air inlet and an air outlet, and the wind with dust passes through the dust collecting pipe and the filter part inside thereof; the filter part is provided with a cleaning part for cleaning the dust adhering to the filter part, and the cleaning part includes a spiral scraper sleeved on the inner side of the filter part, and the spiral scraper is used to scrape off the dust on the inner wall of the filter part when rotating, and the cleaning part also includes a spiral layer sleeved on the outer side of the cleaning part. The present invention clamps the filter layer by fitting the outer side of the spiral scraper with the inner wall of the filter layer, and the spiral layer cooperates with the spiral scraper to clamp the filter layer, which will not affect the filtering effect of the filter layer, and the outer side of the position scraped by the spiral scraper is blocked by the spiral layer, so that the dust-carrying gas cannot move outward, and has no outward thrust, so as to avoid the dust from being squeezed into the holes of the filter layer and expanding the holes as much as possible.

Description

Technical Field

[0001] The invention relates to the technical field of dust collection in the air, in particular to an environmentally friendly building dispersed dust treatment device. Background Art

[0002] During the construction process, loading and unloading construction materials, mixing concrete, transporting stones and other operations will generate a lot of dust and dust. These dusts not only affect the air quality around the construction site, but may also enter the human body through the respiratory system, causing harm to people's health. Therefore, collecting dust dispersed in the air is an important measure to protect air quality and reduce air pollution. Collecting dust dispersed in the air is also an important measure to promote the development of environmental protection.

[0003] At present, in the construction industry, dust dispersed in the air can be collected in a variety of ways. The most common method is to use fences and walls to enclose the construction area to reduce the spread of dust to the external environment. In operations that are prone to dust generation, such as excavation, backfilling, and demolition, water mist spraying devices are used to reduce the generation and spread of dust through the wetting effect of water mist. Spraying equipment is set up at the construction site to spray water mist into the construction area to further reduce the suspension and flying of dust.

[0004] However, using water mist in a small indoor space can easily lead to an overly humid environment, which is not conducive to production operations. Therefore, a dust collector is installed to suck the generated dust into the equipment through a fan, and then purify it through filter bags and other filtering devices. Based on this, the filter bag of the dust collector needs to be cleaned after a period of use, and the machine needs to be shut down, which affects its collection of dust. In addition, when there is dust in the filter bag, the filter bag will be partially blocked, the air intake will be affected, and the efficiency of dust adsorption will be greatly affected. Based on this, improvements are proposed for the filter bag that collects diffuse dust to maintain continuous air intake and ensure air intake. Summary of the invention

[0005] The purpose of the present invention is to provide an environmentally friendly construction dust treatment device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an environmentally friendly building diffuse dust treatment device, comprising a dust collecting pipe and a filter part inside the dust collecting pipe, wherein the upper and lower sides of the dust collecting pipe are respectively provided with an air inlet and an air outlet, and the wind carrying dust passes through the dust collecting pipe and the filter part inside the dust collecting pipe;

[0007] The filter part is provided with a cleaning part for cleaning dust adhered to the filter part, the cleaning part includes a spiral scraper sleeved on the inner side of the filter part, the spiral scraper is used to scrape off the dust on the inner wall of the filter part when rotating, the cleaning part also includes a spiral layer sleeved on the outer side of the cleaning part, the spiral layer cooperates with the spiral scraper, the thickness of the spiral layer is greater than the thickness of the spiral scraper, and is used to support the filter part;

[0008] The lower end of the filter part is also provided with a receiving bucket for collecting the scraped dust.

[0009] Furthermore, a circle of annular fixing plates is fixed inside the dust collecting pipe, and the filter part includes a cylindrical filter layer and external fixing rings provided on the upper and lower sides thereof, and two groups of the external fixing rings are respectively fixed on the upper and lower sides of the filter layer, and the outer fixing ring at the upper end is fixed to the annular fixing plate, and the outer fixing ring at the upper end and the annular fixing plate close the channel between the dust collecting pipe and the filter part, so that the moving wind can only enter the filter layer.

[0010] Furthermore, the filter layer is made of metal and has holes for filtering on its surface.

[0011] Furthermore, a rotating shaft is provided on the central axis of the spiral scraper from top to bottom, the rotating shaft is fixed to the spiral scraper, and the rotating shaft near the upper and lower ends is rotatably connected with a support frame, the support frame is coaxial with the rotating shaft, the support frame at the upper end is fixed to the annular fixing plate, a motor for driving the rotating shaft to rotate is fixed on the support frame at the upper end, the support frame at the lower end is fixed to the outer fixing ring at the lower end, and the motor is used to drive the spiral scraper to rotate to scrape off the dust adhering to the filter layer.

[0012] Furthermore, the spiral scraper extends downward in a spiral shape, and its outer edge is vertical and contacts the inner wall of the filter layer.

[0013] Furthermore, a fixing ring 1 and a fixing ring 2 are respectively fixed at the upper and lower ends of the spiral layer, and the fixing ring 1 and the fixing ring 2 are both sleeved on the outside of the filter layer. A fixing ring bracket is also fixed on the outside of the fixing ring 2, and the fixing ring bracket is coaxial with the rotating shaft and fixed, and is used to drive the spiral layer to rotate. The spiral layer and the spiral scraper clamp the filter layer.

[0014] Furthermore, the second fixing ring and the spiral layer are both provided with cavities, the cavities of the two are connected, and the cavities of the two are used to transmit gas. The inner side of the spiral layer is provided with a recessed opening extending along its shape, the outer side of the recessed opening is in contact with the filter layer, and the inner side thereof is connected with the cavity of the spiral layer. The recessed opening is located on the lower side of the spiral scraper, and air is blown through the recessed opening to blow dust adhered to the holes of the filter layer inward to facilitate scraping off by the spiral scraper.

[0015] Furthermore, a support sheet is fixed to the upper end of the second fixing ring, and a lower end of the support sheet is fixed to a receiving bucket, and the receiving bucket is filled with water for wetting the fallen dust.

[0016] Furthermore, a receiving frame is fixed to the lower end of the receiving barrel, and a small air pump can be installed on the receiving frame. The outer side of the receiving barrel has an outward-facing threaded tube, and a rotatable tube end is threadedly connected to the inner thread of the threaded tube. The outer side of the fixing ring 2 is fixed with an external air inlet connected to its internal cavity. The tube end is rotated to extend into the external air inlet for inflation. The outer side of the tube end is fixedly connected with an air inlet pipe, and the air inlet pipe is used to transmit the gas generated by the small air pump.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0018] 1. The dust adheres to the inner side of the filter layer, is cleaned by the spiral scraper, and moves downward into the receiving barrel, maintaining the filtering effect of the filter layer to a certain extent, and the gas with dust entering the filter layer avoids excessive resistance and affects the filtering effect.

[0019] 2. The outer side of the spiral scraper fits with the inner wall of the filter layer, and the spiral layer cooperates with the spiral scraper to clamp the filter layer, which will not affect the filtering effect of the filter layer. The position scraped by the spiral scraper is blocked by the spiral layer on the outside, and the dusty gas cannot move outward and has no outward thrust, thus avoiding the dust from being squeezed into the holes of the filter layer and enlarging the holes as much as possible.

[0020] 3. The inner side of the spiral layer has a concave opening, and air can be blown toward the filter layer from its inside. The dust adhering to the inner side of the filter layer is blown inward, which can prevent the dust from getting stuck in the holes of the filter layer to a certain extent. After that, the dust is driven downward by the spiral scraper and moves into the receiving barrel, where it comes into contact with water, thus preventing it from flying again and enlarging the holes of the filter layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of a half-section structure of a dust collecting tube of the present invention;

[0024] Figure 3 It is a schematic diagram of the separation structure of the upper and lower sides of the filter part of the present invention;

[0025] Figure 4 It is a schematic diagram of the exploded structure of the filter part and the cleaning part of the present invention;

[0026] Figure 5 It is a schematic diagram of the decomposed structure of the cleaning part of the present invention;

[0027] Figure 6 It is a schematic diagram of the partial structure of the spiral scraper and the spiral layer cross section of the present invention;

[0028] Figure 7 The present invention Figure 6 A is a schematic diagram of the partially enlarged structure of the middle part;

[0029] Figure 8 It is a schematic diagram of the two-half cross-section structure of the fixing ring of the present invention;

[0030] Fig. 9 It is a structural schematic diagram of the connection relationship between the fixing ring 2, the receiving barrel and the receiving frame of the present invention.

[0031] In the figure: 1. dust collecting pipe; 11. air inlet; 12. air outlet; 13. annular fixing plate; 2. filter unit; 21. outer fixing ring; 22. filter layer; 3. cleaning unit; 31. support frame; 32. rotating shaft; 33. spiral scraper; 34. spiral layer; 341. recessed mouth; 35. fixing ring 1; 36. fixing ring 2; 361. outer air inlet; 37. fixing ring bracket; 4. motor; 5. receiving barrel; 51. supporting sheet; 6. receiving frame; 61. air inlet pipe; 62. pipe end. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-Figure 9The present invention provides a technical solution: in a narrow environment, in order to avoid wetting the ring, the best way is to filter the dust in the air. The dust collector in the prior art can achieve the filtering effect, but it needs regular replacement or maintenance. After a long time of use, the dust inside the dust bag will block the dust bag, affecting the next step of work. Especially in indoor construction, the narrow space is not conducive to ventilation, and the dust is large. It is difficult for ordinary dust bags to filter the dust continuously. Based on this, an environmentally friendly building diffuse dust treatment equipment is proposed, including a dust collecting pipe 1 and a filter part 2 inside it. The upper and lower sides of the dust collecting pipe 1 are respectively provided with an air inlet 11 and an air outlet 12. The dust-carrying wind passes through the dust collecting pipe 1 and passes through the filter part 2 inside it. The dust-carrying gas is guided into the dust collecting pipe 1 by the fan, and moves out from the air outlet 12 through the filter part 2, so as to filter the dust-carrying gas.

[0034] like Figure 4 As shown, the filter part 2 is provided with a cleaning part 3 for cleaning dust adhered to the filter part 2, the cleaning part 3 includes a spiral scraper 33 sleeved on the inner side of the filter part 2, and the spiral scraper 33 is used to scrape off the dust on the inner wall of the filter part 2 when rotating, and the cleaning part 3 also includes a spiral layer 34 sleeved on the outer side of the cleaning part 3, the spiral layer 34 cooperates with the spiral scraper 33, the thickness of the spiral layer 34 is greater than the thickness of the spiral scraper 33, and is used to support the filter part 2, wherein the cleaning part 3 on the filter part 2 is used to clean the dust adhered to the filter part 2, wherein the outer spiral layer 34 will be supported on the outer side of the filter mesh layer 22 to prevent the gas from moving outward from the position to be cleaned, thereby reducing the thrust of the outward moving gas on the dust adhered to the filter mesh layer 22, so as to facilitate the spiral scraper 33 to scrape off the dust, and the thickness of the spiral layer 34 is greater than the thickness of the spiral scraper 33, so that the position cleaned by the spiral scraper 33 does not have the thrust of the outward moving gas;

[0035] A receiving bucket 5 for collecting scraped dust is also provided at the lower end of the filter part 2, so as to collect the dust in a centralized manner and maintain the filtering effect of the filter layer 22.

[0036] like Figure 2 As shown, in order to allow the gas entering the dust collecting pipe 1 to pass through the filter part 2, a circle of annular fixing plate 13 is fixed in the dust collecting pipe 1, and the filter part 2 includes a cylindrical filter layer 22 and outer fixing rings 21 provided on both upper and lower sides thereof, and two groups of outer fixing rings 21 are respectively fixed on the upper and lower sides of the filter layer 22, and the outer fixing ring 21 at the upper end is fixed to the annular fixing plate 13, and the outer fixing ring 21 at the upper end and the annular fixing plate 13 close the channel between the dust collecting pipe 1 and the filter part 2, so that the moving wind can only enter the filter layer 22, and the gas enters from the upper end of the filter part 2.

[0037] The filter layer 22 is made of metal and has filtering holes on its surface. The outer circle of the filter layer 22 can filter dust to allow the gas to move smoothly. The filtering holes have a filter mesh number of 80 to 300 meshes.

[0038] A rotating shaft 32 is provided on the central axis of the spiral scraper 33 from top to bottom, and the rotating shaft 32 is fixed to the spiral scraper 33. The rotating shaft 32 is rotatably connected to a support frame 31 near the upper and lower ends. The support frame 31 is coaxial with the rotating shaft 32. The upper support frame 31 is fixed to the annular fixing plate 13. A motor 4 for driving the rotating shaft 32 to rotate is fixed on the upper support frame 31. The lower support frame 31 is fixed to the outer fixing ring 21 at the lower end. The motor 4 is used to drive the spiral scraper 33 to rotate, scrape off the dust adhered to the filter layer 22, and the rotating shaft 32 is driven to rotate under the action of the motor 4, and the spiral scraper 33 is cleaned.

[0039] The spiral scraper 33 extends downward in a spiral shape, and its outer edge is vertical and contacts the inner wall of the filter layer 22, so that the outer side of the spiral scraper 33 fits the inner side of the filter layer 22, and the dust is scraped off during rotation.

[0040] like Figure 5 As shown, in order to limit the spiral layer 34, a fixing ring 1 35 and a fixing ring 2 36 are fixed to the upper and lower ends of the spiral layer 34 respectively. The fixing ring 1 35 and the fixing ring 2 36 are both sleeved on the outside of the filter layer 22. A fixing ring bracket 37 is also fixed to the outside of the fixing ring 2 36. The fixing ring bracket 37 is coaxial with the rotating shaft 32 and fixed, and is used to drive the spiral layer 34 to rotate. The spiral layer 34 and the spiral scraper 33 clamp the filter layer 22. Through the limitation of the fixing ring 1 35 and the fixing ring 2 36, the spiral layer 34 can rotate synchronously with the spiral scraper 33, and the axes of the two coincide.

[0041] like Figure 6 and Figure 7 As shown, at the position blocked by the spiral layer 34, there is still dust adhered in the holes of the filter layer 22, so as to avoid squeezing the dust during the scraping process. The fixing ring 2 36 and the spiral layer 34 are both arranged in a cavity, and the cavities of the two are connected, and the cavities of the two are used to transmit gas. A recessed opening 341 extending along its shape is provided on the inner side of the spiral layer 34, and the outer side of the recessed opening 341 is in contact with the filter layer 22, and the inner side is connected with the cavity of the spiral layer 34. The position of the recessed opening 341 is located on the lower side of the spiral scraper 33, and the recessed opening 341 is used for blowing dust adhered to the holes of the filter layer 22 inwardly, so as to facilitate the scraping of the spiral scraper 33. Air is blown before scraping the filter layer 22 to clean the dust in the holes inwardly, so as to facilitate subsequent cleaning and reduce the blockage of the holes.

[0042] A support sheet 51 is fixed to the upper end of the fixing ring 2 36, and the lower end of the support sheet 51 is fixed to the receiving bucket 5. The receiving bucket 5 is filled with water to wet the fallen dust. The dust mixed with the water is dissolved in the water to prevent it from flying again. In addition, the receiving bucket 5 is followed.

[0043] A receiving frame 6 is fixed to the lower end of the receiving barrel 5, and a small air pump can be installed on the receiving frame 6. The outer side of the receiving barrel 5 has an outward-facing threaded pipe, and a rotatable pipe end 62 is connected to the inner thread of the threaded pipe. An external air inlet 361 connected to the internal cavity of the fixing ring 2 is fixed to the outer side of the fixing ring 36. The pipe end 62 is rotated to extend the pipe end 62 into the external air inlet 361 for inflation. An air inlet pipe 61 is fixedly connected to the outer side of the pipe end 62. The air inlet pipe 61 is used to transmit the gas generated by the small air pump. The generated gas passes through the air inlet pipe 61 and then enters the cavity of the fixing ring 2 36 from the pipe end 62. The gas moves along the cavity of the spiral layer 34 and is squeezed out from the recessed mouth 341 to blow the dust inward. Based on this, the gas blown inward only acts on the position before cleaning, and the positions of most of the filter layers 22 are not affected, thereby avoiding affecting the filtering effect at other positions.

[0044] The working principle of the present invention is as follows: through the existing fan, the dusty gas from the outside is transported to the air inlet end of the dust collecting pipe 1, and the dusty gas enters the filter layer 22. Since the lower end is closed by the receiving barrel 5, the dusty gas can only pass through the filter layer 22 and then move out from the air outlet 12, thereby filtering the dusty gas.

[0045] However, the dusty gas adheres to the inner side of the filter layer 22 and is cleaned by the spiral scraper 33 driven by the motor 4, causing the dust to move downward into the receiving barrel 5, thereby maintaining the filtering effect of the filter layer 22 to a certain extent, so that the dusty gas entering the filter layer 22 avoids excessive resistance and affects the filtering effect.

[0046] In addition, when scraping off the dust on the inner wall of the filter layer 22, in order to clean it to the best degree, it is necessary to make the outer side of the spiral scraper 33 fit the inner wall of the filter layer 22. However, the local dust is located in the holes of the filter layer 22, not just on the inner side of the holes. The spiral scraper 33 rotates and squeezes the dust in the holes of the filter layer 22 outward, causing the holes of the filter layer 22 to deform and expand, so that subsequent use will easily cause some dust to escape outward. Based on this, the spiral layer 33 provided on the outer side 34, the spiral layer 34 cooperates with the spiral scraper 33 to clamp the filter layer 22. In addition, the spiral scraper 33 and the spiral layer 34 will not affect the filtering effect of the filter layer 22, but the position scraped by the spiral scraper 33 is blocked on the outside by the spiral layer 34, which also prevents the gas with dust from moving outward. To a certain extent, the scraping position does not have an outward thrust, so that the dust is easily scraped off, and the dust is prevented from being squeezed into the holes of the filter layer 22 and expanding the holes as much as possible.

[0047] At the same time, the spiral layer 34 is rotating, and its inner side has a recessed opening 341, and air can be blown toward the filter layer 22 from its interior, so that the dust adhering to the inner side of the filter layer 22 can be blown inward, thereby preventing the dust from being stuck in the holes of the filter layer 22 to a certain extent. After that, the dust is driven downward by the spiral scraper 33, so that it moves into the receiving barrel 5 and contacts with water, thereby preventing it from flying again and preventing the holes of the filter layer 22 from being enlarged. In addition, the receiving barrel 5 can rotate with the rotating shaft 32, and the water inside can be stirred to a certain extent, which is convenient for mixing the dust with water and preventing the dust from floating on the water and being lifted up again.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An environmentally friendly building dust treatment device, characterized in that: It comprises a dust collecting pipe (1) and a filter portion (2) therein, wherein the dust collecting pipe (1) has an air inlet (11) and an air outlet (12) at the upper and lower sides respectively, and air carrying dust passes through the dust collecting pipe (1) and the filter portion (2) therein; The filter portion (2) is provided with a cleaning portion (3) for cleaning dust adhered to the filter portion (2); the cleaning portion (3) comprises a spiral scraper (33) sleeved on the inner side of the filter portion (2); the spiral scraper (33) is used to scrape off dust on the inner wall of the filter portion (2) when rotating; the cleaning portion (3) further comprises a spiral layer (34) sleeved on the outer side of the cleaning portion (3); the spiral layer (34) cooperates with the spiral scraper (33); the thickness of the spiral layer (34) is greater than that of the spiral scraper (33), and the spiral layer (34) is used to support the filter portion (2); The lower end of the filter portion (2) is also provided with a receiving bucket (5) for collecting scraped dust; A ring-shaped fixing plate (13) is fixed inside the dust collecting pipe (1), and the filter part (2) comprises a cylindrical filter screen layer (22) and outer fixing rings (21) provided on both upper and lower sides thereof, and two groups of the outer fixing rings (21) are respectively fixed on the upper and lower sides of the filter screen layer (22), and the outer fixing ring (21) at the upper end is fixed to the ring-shaped fixing plate (13), and the outer fixing ring (21) at the upper end and the ring-shaped fixing plate (13) close the passage between the dust collecting pipe (1) and the filter part (2), so that the moving wind can only enter the filter screen layer (22); A rotating shaft (32) is provided on the central axis of the spiral scraper (33) from top to bottom, the rotating shaft (32) is fixed to the spiral scraper (33), and the rotating shaft (32) is rotatably connected to a support frame (31) near the upper and lower ends of the rotating shaft (32), the support frame (31) is coaxial with the rotating shaft (32), the upper end of the supporting frame (31) is fixed to the annular fixing plate (13), the upper end of the supporting frame (31) is fixed with a motor (4) for driving the rotating shaft (32) to rotate, and the lower end of the supporting frame (31) is fixed to the outer fixing ring (21) at the lower end, and the motor (4) is used to drive the spiral scraper (33) to rotate, so as to scrape off dust adhering to the filter layer (22); The spiral layer (34) is respectively fixed with a first fixing ring (35) and a second fixing ring (36) at the upper and lower ends thereof. The first fixing ring (35) and the second fixing ring (36) are both sleeved on the outside of the filter layer (22). A fixing ring bracket (37) is also fixed on the outside of the second fixing ring (36). The fixing ring bracket (37) is coaxial with and fixed to the rotating shaft (32) and is used to drive the spiral layer (34) to rotate. The spiral layer (34) and the spiral scraper (33) clamp the filter layer (22); The second fixing ring (36) and the spiral layer (34) are both provided with cavities, the cavities of the two are connected, and the cavities of the two are used to transmit gas. The inner side of the spiral layer (34) is provided with a recessed opening (341) extending along its shape. The outer side of the recessed opening (341) is in contact with the filter layer (22), and the inner side is connected with the cavity of the spiral layer (34). The position of the recessed opening (341) is located at the lower side of the spiral scraper (33). The recessed opening (341) is used to blow air to blow dust adhering to the holes of the filter layer (22) inwards, so as to facilitate the spiral scraper (33) to scrape it off.

2. The environmentally friendly construction dust treatment equipment according to claim 1 is characterized by: The filter layer (22) is made of metal and has holes for filtering on its surface.

3. The environmentally friendly construction dust treatment equipment according to claim 1 is characterized by: The spiral scraper (33) extends downward in a spiral shape, and its outer edge is vertical and contacts the inner wall of the filter layer (22).

4. The environmentally friendly construction dust treatment equipment according to claim 1 is characterized by: A support sheet (51) is fixed to the upper end of the second fixing ring (36), and the lower end of the support sheet (51) is fixed to the receiving bucket (5). The receiving bucket (5) is filled with water for wetting the fallen dust.

5. The environmentally friendly construction dust treatment equipment according to claim 4 is characterized by: A receiving frame (6) is fixed at the lower end of the receiving barrel (5), and a small air pump can be installed on the receiving frame (6). The outer side of the receiving barrel (5) has an outwardly facing threaded tube, and a rotatable tube end (62) is connected to the inner thread of the threaded tube. The outer side of the fixing ring (36) is fixed with an external air inlet (361) connected to the internal cavity thereof. The tube end (62) is rotated so that the tube end (62) extends into the external air inlet (361) for inflation. The outer side of the tube end (62) is fixedly connected with an air inlet pipe (61), and the air inlet pipe (61) is used to transmit the gas generated by the small air pump.

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