Exhaust system
By designing an annular air inlet and air supply pipe structure in the fiber production spinning exhaust system, the problem of incomplete exhaust collection in the existing technology has been solved, achieving a more efficient exhaust effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2026-03-10
AI Technical Summary
Existing fiber production spinning exhaust systems are ineffective at collecting exhaust air, resulting in low exhaust efficiency.
Design an exhaust system including an exhaust collection device, an air supply duct and an exhaust fan. The air inlet of the exhaust collection device is arranged around the exhaust port, and multiple annular air inlets are distributed in a stepped manner. The effective collection of air is ensured through the structural design of the air supply duct and the second annular exhaust duct.
The ventilation system's ventilation efficiency was improved, enabling effective collection of air discharged from the spinning exhaust vents and enhancing the overall performance of the ventilation system.
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Figure CN223985305U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to fiber production technical field, especially a kind of exhaust system. BACKGROUND
[0002] At present, the air exhausted by fiber production spinning can be discharged through exhaust system;However, the exhaust system is difficult to form effective collection for the air exhausted by fiber production spinning, thereby causing low exhaust efficiency. INVENTION CONTENTS
[0003] Therefore, the utility model provides an exhaust system, which can effectively collect the air discharged from the air outlet, thereby improving the exhaust efficiency of the exhaust system.
[0004] To achieve the above object, the utility model provides the following technical scheme:
[0005] An exhaust system comprises an exhaust collection device, an air supply pipe and an exhaust fan.
[0006] The exhaust collection device comprises an exhaust start end device.
[0007] The air inlet end of the exhaust start end device is arranged around the air outlet and comprises a plurality of annular air inlets arranged concentrically in sequence, which are distributed in a stepped manner from inside to outside.
[0008] The air inlet end of the air supply pipe is in communication with the air outlet end of the exhaust start end device.
[0009] The exhaust fan is arranged at the middle part of the air supply pipe.
[0010] Preferably, the exhaust start end device comprises a first annular exhaust pipe and a plurality of annular baffles.
[0011] The plurality of annular baffles are arranged concentrically in sequence at the first end of the first annular exhaust pipe and arranged around the air outlet, the second ends of the plurality of annular baffles are distributed in a stepped manner from inside to outside, and the annular air inlets are formed between the second ends of every two adjacent annular baffles.
[0012] The air inlet end of the air supply pipe is in communication with the second end of the first annular exhaust pipe.
[0013] Preferably, in the plurality of annular baffles, the first end of the outermost annular baffle is connected with the outer ring portion of the first annular exhaust duct, the first end of the innermost annular baffle is connected with the inner ring portion of the first annular exhaust duct, and a plurality of connecting strips are arranged between each adjacent two annular baffles; wherein the first end of the annular baffle is close to the other end of the first annular exhaust duct.
[0014] Preferably, the plurality of annular baffles are equally spaced.
[0015] Preferably, the axial length of the plurality of annular baffles gradually shortens from outside to inside by 15-25%.
[0016] Preferably, the exhaust air collecting device further comprises a second annular exhaust duct, which is in a tapered structure along the length direction, and the first end is large and the second end is small.
[0017] The first end of the second annular exhaust duct is in communication with the second end of the first annular exhaust duct, and the second end is in communication with the air inlet end of the air supply pipe.
[0018] Preferably, the second annular exhaust duct is sequentially divided into a first constant diameter section, a first variable diameter section, a second constant diameter section, a second variable diameter section and a third constant diameter section along the length direction.
[0019] The first variable diameter section and the second variable diameter section are both tapered structures; the large mouth of the first variable diameter section is adjacent to the first constant diameter section, and the small mouth is adjacent to the second constant diameter section; the large mouth of the second variable diameter section is adjacent to the second constant diameter section, and the small mouth is adjacent to the third constant diameter section.
[0020] Preferably, the number of air inlet ends of the air supply pipe is two.
[0021] The number of exhaust air collecting devices is multiple.
[0022] Among the plurality of exhaust air collecting devices, the air inlet ends of the exhaust start end devices of half of the exhaust air collecting devices are arranged one by one around the same side of the plurality of exhaust ports, and the second ends of the second annular exhaust ducts are in communication with one air inlet end of the air supply pipe respectively; the air inlet ends of the exhaust start end devices of the other half of the exhaust air collecting devices are arranged one by one around the other same side of the plurality of exhaust ports, and the second ends of the second annular exhaust ducts are in communication with the other air inlet end of the air supply pipe respectively.
[0023] Preferably, both air inlet ends of the air supply pipe are tapered structures, and the part adjacent to the second annular exhaust duct is large, and the other part adjacent to the air supply pipe body is small.
[0024] Preferably, it further comprises an exhaust air treatment device.
[0025] The air inlet of the exhaust treatment device is connected to the air outlet of the air supply pipe.
[0026] As can be seen from the above technical solution, in the exhaust system provided by this utility model, the air inlet of the exhaust starting device can form an encircling air inlet for the exhaust port, and the encircling air inlet is distributed in a stepped manner from the inside to the outside. Furthermore, the middle annular air inlet of the encircling air inlet corresponds to the exhaust port. This allows for the collection of the air discharged from the exhaust port as much as possible, thus effectively collecting the air discharged from the exhaust port and improving the exhaust efficiency of the exhaust system. Attached Figure Description
[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0028] Figure 1 This is a schematic diagram of the exhaust system provided in an embodiment of the present utility model;
[0029] Figure 2 A schematic diagram of the structure of the exhaust initiation device provided in this embodiment of the utility model;
[0030] Figure 3 A bottom view of the exhaust initiation device provided in an embodiment of this utility model;
[0031] Figure 4 A structural cross-sectional view of the exhaust initiation device provided in an embodiment of this utility model;
[0032] Figure 5 A cross-sectional view of the exhaust pipe provided in an embodiment of this utility model.
[0033] Among them, 1 is the air supply duct, 2 is the exhaust inlet device, 21 is the first annular exhaust duct, 22 is the annular baffle, 23 is the annular air inlet, 24 is the connecting strip, 3 is the spinning exhaust outlet, 4 is the second annular exhaust duct, 41 is the first equal diameter section, 42 is the first variable diameter section, 43 is the second equal diameter section, 44 is the second variable diameter section, 45 is the third equal diameter section, 5 is the exhaust treatment device, 6 is the first exhaust fan, 7 is the second exhaust fan, and 8 is the third exhaust fan. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0035] The exhaust system provided in this embodiment of the utility model, such as Figure 1 As shown, it includes: an exhaust collection device, an air supply duct 1, and an exhaust fan;
[0036] The exhaust collection device includes an exhaust initiation device 2;
[0037] The air inlet of the exhaust starting device 2 is used to surround the exhaust port and includes a plurality of annular air inlets 23 arranged concentrically in sequence. The plurality of annular air inlets 23 are distributed in a stepped manner from the inside to the outside. Among the plurality of annular air inlets 23, the middle annular air inlet 23 corresponds to the exhaust port, and the exhaust port exhausts air along the radial direction of the annular air inlet 23.
[0038] The air inlet of the air supply duct 1 is connected to the air outlet of the exhaust inlet device 2;
[0039] The exhaust fan is located in the middle part of the air supply duct 1.
[0040] It should be noted that, as Figure 1 As shown, the exhaust port can be a spinning exhaust port 3 (hereinafter the same) or other exhaust ports. The air inlet of the exhaust starting device 2 can be an annular structure and is used to surround the spinning exhaust port 3. The air inlet of the exhaust starting device 2 includes: a plurality of annular air inlets 23 arranged concentrically in sequence. The plurality of annular air inlets 23 are distributed in a stepped manner from the inside to the outside (a stepped distribution with a lower inner diameter and a higher outer diameter), that is, their axial dimensions (such as axial length) increase from the inside to the outside. The annular air inlet 23 located in the middle of the plurality of annular air inlets 23 corresponds to the spinning exhaust port 3 (which can also be a spinning blower) (and can be distributed at the same height). Figure 1As shown, the annular air inlet 23 located in the middle can be distributed on the same horizontal plane as the spinning exhaust outlet 3. The spinning exhaust outlet 3 can exhaust air radially outward along the annular air inlet 23. In this way, the air discharged from the spinning exhaust outlet 3 can be directly collected by the annular air inlet 23 located in the middle. Even if the air discharged from the spinning exhaust outlet 3 moves axially along the annular air inlet 23, it can be collected by the annular air inlet 23 located on the inner side, or it can be collected by the annular air inlet 23 located on the outer side. This can effectively collect the air discharged from the spinning exhaust outlet 3, thereby facilitating the improvement of the exhaust efficiency of the exhaust system. Of course, the air inlet end of the air supply pipe 1 is connected to the air outlet end of the exhaust starting device 2, and the exhaust fan is set in the middle part of the air supply pipe 1 to provide conveying power for the exhaust of the air supply pipe 1. In addition, as Figure 1 As shown, the air inlet direction of the annular air inlet 23 can be its axial direction, and the air outlet direction of the spinning exhaust outlet 3 can be perpendicular to the air inlet direction of the annular air inlet 23. Moreover, the exhaust system provided by this solution can be used as a fiber production spinning exhaust system. Of course, the exhaust collection method provided by this solution can also be applied to exhaust outlets in other fields.
[0041] In other words, the air inlet of the exhaust inlet device 2 of this exhaust system can form an encircling air inlet for the exhaust port, and the encircling air inlet is distributed in a stepped manner from the inside to the outside. The middle annular air inlet of the encircling air inlet corresponds to the exhaust port. This can collect the air discharged from the exhaust port as much as possible, thus effectively collecting the air discharged from the exhaust port and improving the exhaust efficiency of the exhaust system.
[0042] In this plan, such as Figure 4 As shown, the exhaust initiation device 2 includes: a first annular exhaust pipe 21 and multiple annular baffles 22;
[0043] like Figure 3 As shown, multiple annular baffles 22 are concentrically arranged at the first end 211 of the first annular exhaust pipe 21, and are distributed around the exhaust port, as follows: Figure 4 As shown, the second ends 222 of the multiple annular baffles 22 are distributed in a stepped manner from the inside to the outside, and an annular air inlet 23 is formed between the second ends 222 of each two adjacent annular baffles 22; wherein, the second end 222 of the annular baffles 22 is the end away from the first annular exhaust pipe 21.
[0044] The air inlet of the air supply duct 1 is connected to the second end 212 of the first annular exhaust duct 21.
[0045] It should be noted that the first annular exhaust duct 21 can be a circular annular exhaust duct (e.g., Figure 2 (as shown) or a square ring structure, the ring baffle 22 can be a circular ring baffle (such as...) Figure 3 (as shown) or a square annular baffle; wherein, as Figure 2As shown, when the first annular exhaust pipe 21 is a circular annular exhaust pipe (at this time, the first annular exhaust pipe 21 can be an exhaust ring), the annular baffle 22 is also a circular annular baffle accordingly; the first end 211 of the first annular exhaust pipe 21 can be used as the air inlet end of the first annular exhaust pipe 21 (e.g., Figure 2 The lower end of the first annular exhaust pipe 21), and the second end 212 can be used as the air outlet of the first annular exhaust pipe 21 (e.g., the lower end of the first annular exhaust pipe 21). Figure 2 (The upper end of the first annular exhaust pipe 21); such as Figure 4 As shown, multiple annular baffles 22 are concentrically arranged at the first end 211 of the first annular exhaust pipe 21, and are distributed around the spinning exhaust port 3; wherein, as Figure 4 As shown, the second ends 222 of multiple concentrically arranged annular baffles 22 are distributed in a stepped manner from the inside out (a stepped distribution with lower inner ends and higher outer ends). That is, the axial length of the multiple annular baffles 22 increases from the inside out, with the innermost annular baffle 22 having the shortest axial length and the outermost annular baffle 22 having the longest axial length. This results in a stepped distribution of increasingly higher second ends 222 of the multiple annular baffles 22 from the inside out. Furthermore, an annular air inlet 23 is formed between the second ends 222 of every two adjacent annular baffles 22. Figure 4 As shown, multiple annular air inlets 23 are arranged in a stepped pattern from the inside out, which facilitates the effective collection of air discharged from the spinning exhaust port 3. Of course, the air inlet end of the air supply pipe 1 can be an annular structure to facilitate connection with the second end 212 of the first annular exhaust pipe 21. Furthermore, the annular baffle 22 can be an annular baffle plate. The number of annular air inlets 23 can be selected according to the actual exhaust volume requirements; the number of annular air inlets 23 can be 3-10, such as... Figure 4 As shown, the number of annular air inlets 23 can preferably be 6; in addition, the annular baffle 22 located in the middle can correspond to or be distributed at the same height as the spinning exhaust port 3.
[0046] In other words, the exhaust initiation device 2 provided in this solution has multiple annular baffles 22 concentrically arranged at the first end 211 of the first annular exhaust pipe 21, and the axial length of the multiple annular baffles 22 increases from the inside to the outside. That is, by concentrically arranging multiple annular baffles 22 with different axial lengths at the first end 211 of the first annular exhaust pipe 21, multiple annular air inlets 23 are formed at the first end 211 of the first annular exhaust pipe 21 in a stepped distribution with a lower inner diameter and a higher outer diameter. Of course, this also simplifies the structural form of the air inlet end of the exhaust initiation device 2. In addition, the exhaust initiation device 2 can be a one-piece structure, which can be obtained by CNC machining or injection molding.
[0047] Specifically, such as Figure 4As shown, among the multiple annular baffles 22, the first end 221 of the outermost annular baffle 22 is connected to the outer ring portion of the first annular exhaust pipe 21, and the first end 221 of the innermost annular baffle 22 is connected to the inner ring portion of the first annular exhaust pipe 21, as shown. Figure 3 As shown, multiple connecting strips 24 are provided between each pair of adjacent annular baffles 22; wherein, the first end 221 of the annular baffle 22 is the other end close to the first annular exhaust pipe 21.
[0048] It should be noted that, as Figure 2 As shown, the outer ring portion and the inner ring portion of the first annular exhaust pipe 21 can be hollow. To facilitate the connection of multiple annular baffles 22 with the first annular exhaust pipe 21 so that the exhaust initiation device 2 forms a whole, accordingly, as shown... Figure 4 As shown, the first end 221 of the outermost annular baffle 22 can be connected to the first end 211 of the outer ring portion of the first annular exhaust pipe 21, and the first end 221 of the innermost annular baffle 22 is connected to the first end 211 of the inner ring portion of the first annular exhaust pipe 21, as shown. Figure 3 As shown, multiple connecting strips 24 are provided between each pair of adjacent annular baffles 22, and the multiple connecting strips 24 between each pair of adjacent annular baffles 22 can be evenly distributed along the circumference of the annular baffles 22 (even if the distribution is not uniform as shown in the figure). In this way, it is easy to form a whole by multiple concentrically arranged annular baffles 22. Furthermore, by connecting the first end 221 of the outermost annular baffle 22 to the inner and outer ring parts of the first annular exhaust pipe 21 one by one, multiple annular baffles 22 and the first annular exhaust pipe 21 can be formed into a whole. Among them, the connecting strips 24 can be connecting ribs and can be distributed along the axial direction of the shorter annular baffle 22.
[0049] Furthermore, such as Figure 3 As shown, multiple annular baffles 22 are distributed at equal intervals. That is, the distance between any two adjacent annular baffles 22 is equal, which facilitates the effective and uniform collection of the air discharged from the spinning exhaust port 3 by the multiple annular baffles 22, thereby helping to improve the air collection and exhaust effect of the multiple annular air inlets 23.
[0050] Furthermore, such as Figure 4 As shown, the axial length of the multiple annular baffles 22 gradually decreases from the outside to the inside at a ratio of 15-25%. That is, the axial length of the multiple annular baffles 22 distributed from the outside to the inside gradually decreases at a ratio of 15-25%. This allows for a relatively dense distribution of the multiple annular air inlets 23, thus enabling better collection of the air discharged from the spinning exhaust port 3. The axial length of the outermost annular baffle 22 can be 20-50 mm.
[0051] In this plan, such as Figure 1As shown, the exhaust collection device also includes a second annular exhaust pipe 4. The second annular exhaust pipe 4 has a constricted structure along its length, with its first end 411 being a large opening and its second end 451 being a small opening.
[0052] The first end 411 of the second annular exhaust pipe 4 is connected to the second end 212 of the first annular exhaust pipe 21, and the second end 451 is connected to the air inlet of the air supply pipe 1. That is to say, the exhaust collection device provided in this solution can add a second annular exhaust pipe 4 with a constricted structure between the second end 212 of the first annular exhaust pipe 21 and the air inlet of the air supply pipe 1. In this way, it is convenient to further collect the exhaust air collected by the exhaust starting device into the air supply pipe 1, which is more conducive to the effective collection of the air discharged from the spinning exhaust port 3, and also makes it easier for the exhaust collection device to collect the gas that needs to be discharged more effectively.
[0053] Specifically, such as Figure 5 As shown, the second annular exhaust pipe 4 is divided into a first equal diameter section 41, a first variable diameter section 42, a second equal diameter section 43, a second variable diameter section 44 and a third equal diameter section 45 along its length.
[0054] Both the first variable diameter section 42 and the second variable diameter section 44 have a gradually narrowing structure; the larger opening of the first variable diameter section 42 is adjacent to the first equal diameter section 41, and the smaller opening is adjacent to the second equal diameter section 43; the larger opening of the second variable diameter section 44 is adjacent to the second equal diameter section 43, and the smaller opening is adjacent to the third equal diameter section 45. That is to say, as... Figure 5 As shown, the second annular exhaust pipe 4 is divided into three equal-diameter sections and two variable-diameter sections that are alternately distributed along its length. This facilitates more efficient, larger-area, and more comprehensive collection of exhaust air from the exhaust initiation device into the air supply pipe 1, and further enables effective collection of the air discharged from the spinning exhaust port 3. Specifically, the end of the first equal-diameter section 41 furthest from the first variable-diameter section 42 is the first end 411 of the second annular exhaust pipe 4, and the end of the third equal-diameter section 45 furthest from the second variable-diameter section 44 is the second end 451 of the second annular exhaust pipe 4. Of course, the second annular exhaust pipe 4 can also adopt other structural forms, such as a gourd-shaped longitudinal section, which will not be elaborated here.
[0055] In other words, the exhaust collection device of this solution, through the unique design of multiple annular baffles at the air inlet of the exhaust starting device 2 and the alternating design of equal diameter and variable diameter sections of the second annular exhaust pipe 4, can ensure the effective collection of the air discharged from the spinning exhaust port 3.
[0056] Furthermore, such as Figure 1 As shown, the number of air inlets in air supply duct 1 is two;
[0057] There are multiple exhaust collection devices;
[0058] Among the multiple exhaust collection devices, the air inlet end of the exhaust starting device 2 of one half of the exhaust collection devices is used to surround multiple exhaust ports on the same side, and the second end 451 of the second annular exhaust pipe 4 is connected to one air inlet end of the air supply pipe 1 respectively. The air inlet end of the exhaust starting device 2 of the other half of the exhaust collection devices is used to surround multiple exhaust ports on the other side, and the second end 451 of the second annular exhaust pipe 4 is connected to the other air inlet end of the air supply pipe 1 respectively.
[0059] It should be noted that, as Figure 1 As shown, the structure of air supply duct 1 can be referred to Figure 1 As shown, it has two air inlets and one air outlet; one air inlet of the air supply pipe 1 can be located above multiple spinning exhaust ports 3 on the same side (like the left side), and the other air inlet can be located above multiple spinning exhaust ports 3 on the other side (like the right side); in the multiple exhaust starting devices 2, the air inlet of the exhaust starting device 2 of half of the exhaust collection device (i.e., multiple annular baffles 22) is used to surround multiple spinning exhaust ports 3 on the same side, and the second end 451 of the second annular exhaust pipe 4 is divided into Do not connect to one air inlet end of the air supply pipe 1; the air inlet end (i.e., multiple annular baffles 22) of the exhaust air collection device 2 is used to surround multiple spinning exhaust ports 3 on the other side, and the second end 451 of the second annular exhaust pipe 4 is connected to the other air inlet end of the air supply pipe 1. In this way, the air discharged from multiple spinning exhaust ports 3 on the same side can be effectively collected, and the air discharged from multiple spinning exhaust ports 3 on the other side can also be effectively collected; of course, Figure 1 The multiple spinning exhaust ports 3 on each side are not shown; furthermore, among the multiple exhaust collection devices, one or both halves of the exhaust collection devices can be arranged in a line, the specific arrangement depending on the arrangement of the multiple spinning exhaust ports 3 on the same side; additionally, the exhaust fans (or centrifugal fans) include: a first exhaust fan 6, a second exhaust fan 7, and a third exhaust fan 8, the arrangement of which in the air supply duct 1 is as follows Figure 1 As shown, the third-row fan 8 can also serve as a relay fan. Of course, the connection between the air supply duct 1 and related components (such as the second annular exhaust duct 4) can be made by welding or soft sealing to avoid air leakage.
[0060] Furthermore, such as Figure 1 As shown, both air inlets of the air supply duct 1 have a constricted opening structure, with the portion adjacent to the second annular exhaust duct 4 having a larger opening and the portion adjacent to the main body of the air supply duct 1 having a smaller opening. The structure of each air inlet of the air supply duct 1 can be referenced... Figure 1As shown, it can be divided into a constant diameter section and a variable diameter section along its length. The variable diameter section can be a gradually narrowing structure, and the constant diameter section can be a hollow cylindrical structure. Moreover, the end face of the constant diameter section (the end face used to connect with the second annular exhaust pipe 4) can be provided with multiple annular air inlets for connecting one half or the other half of the second annular exhaust pipe 4 to the second end 451. In other words, each air inlet end of the air supply pipe 1 is designed in this way to facilitate the further collection of exhaust air collected by the second annular exhaust pipe 4 into the air supply pipe body of the air supply pipe 1.
[0061] In this plan, such as Figure 1 As shown, the exhaust system provided in this embodiment of the present invention also includes an exhaust treatment device 5;
[0062] The air inlet of the exhaust treatment device 5 is connected to the air outlet of the air supply pipe 1, which facilitates the pretreatment of the air discharged from the spinning exhaust port 3 before discharge, avoiding the impact of the air discharged from the spinning exhaust port 3 on the environment, and also increasing the comfort of the workers' working environment. The exhaust treatment device 5 can be a tail gas treatment tower.
[0063] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0064] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An exhaust system, characterized by, The utility model relates to a kind of exhaust air collecting device, air supply pipe (1) and exhaust fan, comprising: The exhaust air collecting device includes exhaust air beginning end device (2); The air inlet end of the exhaust air beginning end device (2) is used to be arranged around exhaust port, and includes a plurality of annular air inlets (23) arranged concentrically in turn, a plurality of the annular air inlets (23) are distributed in ladder shape from inside to outside;Wherein, the annular air inlet (23) in the middle of a plurality of the annular air inlets (23) corresponds with the exhaust port, and the exhaust port exhausts along the radial direction of the annular air inlet (23); The air inlet end of the air supply pipe (1) is communicated with the air outlet end of the exhaust air beginning end device (2); The exhaust fan is arranged in the middle part of the air supply pipe (1). The exhaust air beginning end device (2) includes: first annular exhaust pipe (21) and a plurality of annular baffles (22); 2. The exhaust system of claim 1, wherein, A plurality of the annular baffles (22) are arranged concentrically in turn in the first end of the first annular exhaust pipe (21), and are used to be distributed around the exhaust port, the second end of a plurality of the annular baffles (22) is distributed in ladder shape from inside to outside, and the second end between every two adjacent annular baffles (22) forms the annular air inlet (23);Wherein, the second end of the annular baffle (22) is the end away from the first annular exhaust pipe (21); The air inlet end of the air supply pipe (1) is communicated with the second end of the first annular exhaust pipe (21). In a plurality of the annular baffles (22), the first end of the outermost annular baffle (22) is connected with the outer ring part of the first annular exhaust pipe (21), the first end of the innermost annular baffle (22) is connected with the inner ring part of the first annular exhaust pipe (21), and a plurality of connecting strips (24) are arranged between every two adjacent annular baffles (22);Wherein, the first end of the annular baffle (22) is the other end close to the first annular exhaust pipe (21).
3. The exhaust system of claim 2, wherein, A plurality of the annular baffles (22) are distributed at equal intervals.
4. The exhaust system of claim 2, wherein, The axial length of a plurality of the annular baffles (22) gradually shortens from outside to inside by 15-25% proportion.
5. The exhaust system of claim 2, wherein, The exhaust air collecting device further includes second annular exhaust pipe (4), the first end of the second annular exhaust pipe (4) is large mouth, and the second end is small mouth along the length direction for the structure of necking down; 6. The exhaust system of claim 2, wherein, The first end of the second annular exhaust pipe (4) is communicated with the second end of the first annular exhaust pipe (21), and the second end is communicated with the air inlet end of the air supply pipe (1). The second annular exhaust pipe (4) is divided into first equal diameter section (41), first variable diameter section (42), second equal diameter section (43), second variable diameter section (44) and third equal diameter section (45) in turn along the length direction; 7. The exhaust system of claim 6, wherein, The first variable diameter section (42) and the second variable diameter section (44) are both gradually changed necking down structure;The large mouth of the first variable diameter section (42) is adjacent to the first equal diameter section (41), and the small mouth is adjacent to the second equal diameter section (43);The large mouth of the second variable diameter section (44) is adjacent to the second equal diameter section (43), and the small mouth is adjacent to the third equal diameter section (45). 8. The exhaust system of claim 6, wherein, The number of air inlet ends of the air supply pipe (1) is two; The number of air exhaust collecting devices is multiple; Among the multiple air exhaust collecting devices, the air inlet ends of the air exhaust starting end devices (2) of half of the air exhaust collecting devices are arranged around the multiple air exhaust ports on the same side one by one, and the second ends of the second annular air exhaust pipes (4) are respectively communicated with one air inlet end of the air supply pipe (1); the air inlet ends of the air exhaust starting end devices (2) of the other half of the air exhaust collecting devices are arranged around the multiple air exhaust ports on the other same side one by one, and the second ends of the second annular air exhaust pipes (4) are respectively communicated with the other air inlet end of the air supply pipe (1).
9. The exhaust system of claim 8, wherein, Both air inlet ends of the air supply pipe (1) are of a structure with a large opening adjacent to the second annular air exhaust pipe (4) and a small opening adjacent to the air supply pipe body of the air supply pipe (1).
10. The exhaust system of claim 1, wherein, Further comprising an air exhaust treatment device (5); The air inlet end of the air exhaust treatment device (5) is communicated with the air outlet end of the air supply pipe (1).