阅读说明：本技术 直流旋风分离器 (Direct-flow cyclone separator ) 是由 熊至宜 唐海亮 马仲麟 张云 于 2019-10-15 设计创作，主要内容包括：本发明公开了一种直流旋风分离器,其包括：中空的壳体,壳体具有相对的第一端和第二端,密封穿设在第一端的进气管,进气管的内部设置有导流结构；进气管具有相对的第一首端和第一尾端,第一首端位于壳体外,第一首端设置有进气口；第一尾端位于壳体内；密封穿设在第二端的排气管,排气管具有相对的第二首端和第二尾端,第二尾端位于壳体外,第二尾端设置有出气口；设置在壳体中的锥形罩,锥形罩位于进气管和排气管之间；锥形罩包括空心的圆锥体,圆锥体的尖部指向第一尾端,锥形罩的侧壁与进气管的第一尾端之间形成环形间隙,第二首端伸入圆锥体的底部开口内。本发明能够将全部气体导入后进行高效分离,较佳地满足天然气长输管道送气的需求。(The invention discloses a direct current cyclone separator, which comprises: the air inlet pipe is hermetically arranged at the first end in a penetrating way, and a flow guide structure is arranged in the air inlet pipe; the air inlet pipe is provided with a first head end and a first tail end which are opposite, the first head end is positioned outside the shell, and the first head end is provided with an air inlet; the first tail end is positioned in the shell; the exhaust pipe is hermetically penetrated at the second end and provided with a second head end and a second tail end which are opposite, the second tail end is positioned outside the shell, and the second tail end is provided with an air outlet; a conical cover disposed in the housing, the conical cover being located between the intake pipe and the exhaust pipe; the conical cover comprises a hollow cone, the tip of the cone points to the first tail end, an annular gap is formed between the side wall of the conical cover and the first tail end of the air inlet pipe, and the second head end extends into the bottom opening of the cone. The invention can efficiently separate all the gas after being introduced, and better meets the requirement of gas supply of a long natural gas pipeline.)

1. A once-through cyclone separator, comprising:

a hollow housing having opposed first and second ends,

the air inlet pipe penetrates through the first end of the shell in a sealing mode, and a flow guide structure is arranged inside the air inlet pipe; the air inlet pipe is provided with a first head end and a first tail end which are opposite, the first head end is positioned outside the shell, and the first head end is provided with an air inlet; the first tail end is located within the housing;

the exhaust pipe is hermetically arranged at the second end of the shell in a penetrating way and is provided with a second head end and a second tail end which are opposite, the second tail end is positioned outside the shell, and the second tail end is provided with an air outlet;

a conical cover disposed in the housing, the conical cover being located between the intake pipe and the exhaust pipe; the conical cover comprises a hollow cone, the tip of the cone points to the first tail end, an annular gap is formed between the side wall of the conical cover and the first tail end of the air inlet pipe, and the second head end extends into the bottom opening of the cone.

2. The once-through cyclone separator of claim 1 wherein the inlet duct has a first central axis, the outlet duct has a second central axis, and the cone shroud has a third central axis, the first central axis, the second central axis, and the third central axis being coincident with the axis of the housing.

3. The once-through cyclone separator of claim 1 wherein the wall of the inlet duct adjacent the first end is provided with at least one side slit extending in a helical direction which is the same as the direction of movement of the gas flow.

4. The direct flow cyclone separator of claim 3 wherein the side slots have a height, the side slots having a top end proximate the inlet and a bottom end proximate the first end, the tip of the cone being no further than the top end.

5. The direct-current cyclone separator as claimed in claim 1, wherein the guide structure comprises a guide blade and a guide body, the guide body comprises a cylindrical body and guide cones at two ends of the body, and the guide blade surrounds the guide body.

6. The direct-current cyclone separator as claimed in claim 1, wherein a transition straight cylinder is arranged at the bottom of the conical cover, and a connecting part is arranged between the exhaust pipe and the transition straight cylinder of the conical cover.

7. The once-through cyclone separator of claim 6, wherein the exhaust duct comprises, in order from the second head end to the second tail end: the gas outlet device comprises a straight cylinder section, a conical cylinder section, a body section and the gas outlet, wherein the straight cylinder section is positioned in the transition straight cylinder section.

8. The direct current cyclone separator according to claim 7, wherein a wire mesh is arranged between the straight cylinder section and the transition straight cylinder.

9. The once-through cyclone separator as claimed in claim 1, wherein the housing is provided with a sewage discharge outlet having a height lower than that of the bottom opening of the cone.

10. The direct flow cyclone separator of claim 1, wherein the housing is arranged lengthwise in a height direction, the first end is located at a top of the housing, the second end is located at a bottom of the housing, the air inlet is located at the bottom of the housing, and the air outlet is located at the top of the housing.

Technical Field

The invention relates to the technical field of industrial dust removal, in particular to a direct-current cyclone separator.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The natural gas long-distance pipeline needs to establish a booster station along the way, a compressor is arranged in the booster station, and the natural gas long-distance transmission is realized through multi-stage compression of the compressor. The compressor is the heart of natural gas pipeline transportation, and the security and the reliability of its operation will be related to whether the unit can long period steady operation, in case the unit breaks down because of the sealed inefficacy, will directly influence the low reaches air feed.

In order to prevent or inhibit the leakage of the gas generated by the sealing failure to the atmosphere along the rotary shaft end of the compressor, various shaft end sealing devices are required to maintain the normal operation of the main engine of the compressor, reduce the consumption of materials and energy, prevent the environmental pollution and protect the safety of equipment.

Disclosure of Invention

In order to overcome at least one defect in the prior art, the invention provides a novel direct-flow cyclone separator which can effectively separate all gas after being introduced and better meet the requirement of gas delivery of a long natural gas pipeline.

The embodiment of the application discloses direct current cyclone, this direct current cyclone includes: the air inlet pipe is hermetically arranged at the first end of the shell in a penetrating way, and a flow guide structure is arranged in the air inlet pipe; the air inlet pipe is provided with a first head end and a first tail end which are opposite, the first head end is positioned outside the shell, and the first head end is provided with an air inlet; the first tail end is located within the housing; the exhaust pipe is hermetically arranged at the second end of the shell in a penetrating way and is provided with a second head end and a second tail end which are opposite, the second tail end is positioned outside the shell, and the second tail end is provided with an air outlet; a conical cover disposed in the housing, the conical cover being located between the intake pipe and the exhaust pipe; the conical cover comprises a hollow cone, the tip of the cone points to the first tail end, an annular gap is formed between the side wall of the conical cover and the first tail end of the air inlet pipe, and the second head end extends into the bottom opening of the cone.

In a preferred embodiment, the intake pipe has a first center axis, the exhaust pipe has a second center axis, and the conical cover has a third center axis, the first center axis, the second center axis, and the third center axis coincide with an axis of the housing.

In a preferred embodiment, at least one side slit is arranged on the pipe wall of the air inlet pipe close to the first tail end, and the extending direction of the side slit is the same spiral line direction as the moving direction of the air flow.

In a preferred embodiment, the side seam has a height, the side seam has a top end near the air inlet and a bottom end near the first trailing end, and the tip of the cone does not exceed the position of the top end.

In a preferred embodiment, the flow guiding structure includes a guide blade and a flow guiding body, the flow guiding body includes a cylindrical body and guide cones located at two ends of the body, and the guide blade surrounds the flow guiding body.

In a preferred embodiment, a transition straight cylinder is arranged at the bottom of the conical cover, and a connecting part is arranged between the exhaust pipe and the transition straight cylinder of the conical cover.

In a preferred embodiment, the exhaust pipe includes, in order from the second head end to the second tail end: the gas outlet device comprises a straight cylinder section, a conical cylinder section, a body section and the gas outlet, wherein the straight cylinder section is positioned in the transition straight cylinder section.

In a preferred embodiment, a wire mesh is arranged between the straight cylinder section and the transition straight cylinder.

In a preferred embodiment, the housing is provided with a drain outlet, the height of which is lower than the height of the bottom opening of the cone.

In a preferred embodiment, the housing is arranged lengthwise in a height direction, the first end is located at the top of the housing, the second end is located at the bottom of the housing, the air inlet is disposed at the bottom of the housing, and the air outlet is disposed at the top of the housing.

The invention has the characteristics and advantages that: the direct current cyclone that provides in the embodiment of this application, traditional direct current cyclone's design has been broken, the gaseous whole leading-in casings of rotatory that send all intake pipes through design toper cover, carry out the spiral under guide vane's the effect in the casing and accelerate, gaseous and granule are separated under the effect of centrifugal force, wherein, particle impurity is earlier through slowing down with intake pipe inner wall friction and collision, subside after slowing down through with casing inner wall friction and collision, and gaseous blast pipe in baffling entering toper cover bottom opening again. Because the inner diameters of the air inlet pipe and the shell are different, the effect of separating impurities can be effectively enhanced; the conical cover shields the air inlet pipe and the air outlet pipe, impurities moving on the axis can be forcibly pushed away from the axis after encountering the conical cover, and then are settled through air flow rotation centrifugal separation, so that the phenomenon of ash leakage is avoided; can form multi-stage separation, and improve the separation efficiency by separating gas for multiple times.

Drawings

FIG. 1 is a schematic structural diagram of a straight cyclone separator provided in an embodiment of the present application;

FIG. 2 is a schematic view of a flow guiding body of the DC cyclone separator in FIG. 1;

FIG. 3 is a schematic structural diagram of another straight cyclone separator provided in the embodiments of the present application;

fig. 4 is a schematic view of a flow guiding body structure of the straight cyclone separator in fig. 3.

Description of reference numerals:

1. an air inlet; 2. an air outlet; 3. a housing; 31. a sewage draining outlet; 4. an air inlet pipe; 41. performing side sewing; 5. an exhaust pipe; 51. a straight cylinder section; 52. a conical section; 6. a conical cover; 61. a transition straight cylinder; 7. a flow conductor; 710. a central bore; 71. a guide blade; 8. a wire mesh; 9. a connecting portion.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The existing straight-flow type cyclone dust collector utilizes the rotation of airflow to enable impurities in the airflow to be centrifuged to the periphery, the air at the central part is taken and conveyed to the next working procedure, and the impurities at the peripheral part are discharged together with the air, so that a large amount of target air is lost. If the discharged impurity-containing gas is cleaned again, not only is extra cost required, but also the pressure loss is large.

The conveying requirement of natural gas can not have gas escape, and this application can be sealed the miscellaneous gas that contains of peripheral part in the casing through structural improvement. Further, with the separation, when the air pressures inside and outside the air inlet pipe and the air outlet pipe reach balance, part of the impurity-containing gas flows back through the impurity-removing channel, and entrainment and back mixing are caused.

Referring to fig. 1 and fig. 2, or fig. 3 and fig. 4, in the embodiment of the present disclosure, the straight-flow cyclone separator mainly includes a housing 3, an inlet pipe 4 and an outlet pipe hermetically penetrating both ends of the housing 3, a flow guiding structure located in the inlet pipe 4, and a conical cover 6 located in the housing 3 and located between the inlet pipe 4 and the outlet pipe.

The once-through cyclone separator may comprise: the air-conditioning device comprises a shell 3, an air inlet pipe 4, a flow guide structure, an exhaust pipe 5 and a conical cover 6.

The housing 3 may be a hollow cavity structure, and specifically, the housing 3 may be a cylindrical housing 3 having openings at two ends. The housing 3 has opposite first and second ends. Wherein the first end is sealed penetrated with an air inlet pipe 4.

The air inlet pipe 4 is a hollow pipe body and is arranged at the first end of the shell 3 in a sealing and penetrating way. The inner diameter of the inlet pipe 4 is smaller than the inner diameter of the housing 3. The air inlet pipe 4 is provided with a first head end and a first tail end which are opposite, the first head end is positioned outside the shell 3, and the first head end is provided with an air inlet 1; the first end is located within the housing 3. The air inlet 1 may be a flange interface for sealing and abutting with an external air supply interface. A flow guiding structure is arranged in the air inlet pipe 4.

The flow guiding structure may comprise a flow guiding body 7 and guide vanes 71. The flow guide body 7 comprises a cylindrical body and flow guide cones arranged at two ends of the body, and the guide blades 71 are encircled on the flow guide body 7. As shown in fig. 2 or 4, the guide vane 71 has a central hole 710 formed therethrough at a central portion thereof for receiving the baffle 7. Specifically, a cylindrical body in the middle of the flow guiding body 7 plays a supporting role, and the guide blades 71 can be fixed on the cylindrical body in a surrounding manner. The guide cone can avoid generating airflow vortex and reduce energy loss. The state of the air flow is changed before and after the guide vane 71, and energy loss caused by vortex can be reduced by adding guide cones at two ends of the body.

The exhaust pipe 5 is a hollow pipe body and is hermetically inserted into the second end of the housing 3. This blast pipe 5 has relative second head end and second tail end, the second tail end is located outside casing 3, the second tail end is provided with gas outlet 2. The air outlet 2 may be a flange interface, and is configured to be in sealed butt joint with an external air outlet interface.

A conical cover 6 is provided between the intake pipe 4 and the exhaust pipe 5. Conical cover 6 includes hollow cone, the point of cone is directional first tail end, conical cover 6 the lateral wall with form annular gap between the first tail end of intake pipe 4, the bottom opening of cone is directional the second head end. In particular, the conical cover 6 can be connected to the exhaust pipe 5 by means of a connection 9.

Specifically, the intake pipe 4 has a first center axis, the exhaust pipe 5 has a second center axis, and the conical cover 6 has a third center axis, which coincides with the axis of the housing 3. That is, the central axes of the inlet pipe 4, the conical cover 6 and the exhaust pipe 5 are on a straight line, and the straight line coincides with the axis of the shell 3, so that impurities in the gas can be uniformly and efficiently separated.

On the whole, this application has broken traditional straight-flow cyclone's design, and through design conical cover 6 with all intake pipe 4 send the gaseous whole leading-in casing 3 of rotatory, it is rotatory to continue in casing 3, make impurity earlier through with 4 inner wall friction collision of intake pipe slow down, subside after slowing down through with 3 inner wall friction collision of casing, then gaseous blast pipe 5 in the baffling entering conical cover 6 bottom openings that passes through. Because the inner diameters of the air inlet pipe 4 and the shell 3 are different, the effect of separating impurities can be effectively enhanced; the conical cover 6 shields the air inlet pipe 4 and the air outlet pipe 5, impurities moving on the axis can be forcibly pushed to be away from the axis after meeting the conical cover 6, and then are settled through air flow rotation centrifugal separation, so that the phenomenon of ash leakage is avoided; can form multi-stage separation, and improve the separation efficiency by separating gas for multiple times.

In the present description, the present application is explained in detail in connection with different embodiments and the accompanying drawings.

Referring to fig. 1, the straight-flow type cyclone separator shown in fig. 1 may include: the air conditioner includes a housing 3, an intake pipe 4, a baffle 7 provided in the intake pipe 4, guide vanes 71, and an exhaust pipe 5. The head end of intake pipe 4 is air inlet 1, and the tail end of blast pipe 5 is gas outlet 2, and air inlet 1 and gas outlet 2 all run through 3 lateral walls of casing and stretch out outside casing 3. The guide body 7 is arranged in the air inlet pipe 4 and close to the air inlet 1, the guide blades 71 are arranged on the outer side surface of the guide body 7, and the head end of the exhaust pipe 5 points to the tail end of the air inlet pipe 4. A conical cover 6 is also arranged between the air inlet pipe 4 and the air outlet pipe 5. The conical cover 6 is in a hollow conical shape, the tip of the conical cover 6 points to the tail end of the air inlet pipe 4, and the bottom opening of the conical cover 6 points to the head end of the exhaust pipe 5.

A drain opening 31 is provided at the bottom of the housing 3. The drain outlet 31 is normally closed. When the straight-flow type cyclone separator is used for a period of time, the sewage discharge port 31 can be opened to discharge sewage. The height of the drain opening 31 is lower than the height of the bottom opening of the cone so as not to affect the normal flow of gas.

The head end of the exhaust pipe 5 protrudes into the bottom opening of the conical cover 6. Because the air current is in the rotation state all the time in whole device, stretch into the bottom opening of conical cover 6 with the head end of blast pipe 5 in can let gas get into before blast pipe 5 through the centrifugal separation of conical cover toper inner surface wall again, so form multi-stage separation, make gas through many times separation effect, improve separation efficiency.

The side wall of the air inlet pipe 4 is provided with a side seam 41, and the side seam 41 is arranged on the pipe wall of the air inlet pipe 4 along the same spiral line direction with the air flow moving direction. The number of the side slits 41 may be plural, and the plural side slits 41 are provided at regular intervals around the circumferential direction of the intake pipe 4. Through set up many side seams 41 on intake pipe 4, not only can help discharging the impurity of pasting the pipe wall motion in the intake pipe 4 fast, more importantly still keeps abundant wall to supply the impurity collision to slow down the use when increasing the interior gas escape passageway of intake pipe 4 simultaneously, can reduce whole cyclone's pressure loss like this.

Specifically, the side slit 41 is provided at the tail end of the intake pipe 4, and the tip of the conical cover 6 extends into the tail end of the intake pipe 4. The side slits 41 have a height, the side slits 41 have a top end near the air inlet 1 and a bottom end near the first end, and the tip of the cone does not exceed the position of the top end.

In general, the tip position of the conical cover 6 does not exceed the position of the side seam 41 near one end of the air inlet 1. The tip of the conical cover 6 extends into the air inlet pipe 4 to enable the structure of the whole separator to be more compact, and an annular gap is formed between the side wall of the conical cover 6 and the tail end of the air inlet pipe 4. Like this the conical cover 6 has occupied air inlet 1 tail end center "invalid" region, forces the air current to peripheral motion, and the impurity that makes in the air current through the annular space obtains effective separation, and conical cover 6 point portion overlaps with the side seam 41 position and sets up, can effectively reduce because of conical cover 6 stretches into the air-resistor that intake pipe 4 brought, and more gas can promote the impurity of the separation on the 4 inner walls of intake pipe to discharge fast when flowing out by side seam 41. If the conical cover 6 is too high, the rotation of the air flow is affected, the air flow is affected from the side slits 41, and even an annular gap cannot be formed between the conical cover 6 and the tail end of the air inlet pipe 4.

In one embodiment, a transition straight cylinder 61 is also arranged at the bottom opening of the conical cover 6. The pressure drop of the air flow passing through the outer side of the conical cover 6 can be effectively reduced by arranging the transition straight cylinder 61. A connecting part 9 is arranged between the exhaust pipe 5 and the transition straight cylinder 61 of the conical cover 6, and the conical cover 6 is fixed on the exhaust pipe through the connecting part 9. Specifically, the connecting portion 9 may be in the form of a plurality of connecting rods uniformly distributed along the circumferential direction, one end of each connecting rod is fixed on the inner wall of the transition straight cylinder 61, and the other end of each connecting rod is fixed on the exhaust pipe 5. Of course, the connecting portion 9 may have other forms, and the present application is not limited thereto.

Still be provided with wire mesh 8 between the straight section of thick bamboo 61 inner wall of transition and the blast pipe 5 outer wall, wire mesh 8 can prevent effectively that the liquid drop from getting into in the blast pipe 5.

The head end of the exhaust pipe 5 is provided with an air inlet structure, and the air inlet structure is composed of a conical cylinder section 52 and a straight cylinder section 51, so that the exhaust pipe 5 sequentially comprises from the second head end to the second tail end: a straight cylinder section 51, a conical cylinder section 52, a body section and the outlet 2. Wherein, the end with smaller inner diameter of the conical cylinder section 52 is connected with the straight cylinder section 51, and the end with larger inner diameter of the conical cylinder section 52 is connected with the main body of the exhaust pipe 5.

As shown in fig. 2, in the present embodiment, the guide vane 71 may be specifically in the form of a guide vane type vane.

In another embodiment, referring to fig. 3, the straight flow cyclone separator shown in fig. 3 may comprise: including intake pipe 4, blast pipe 5, baffle 7 and guide vane 71, the head end of intake pipe 4 is air inlet 1, and the tail end of blast pipe 5 is gas outlet 2, and baffle 7 sets up and sets up near air inlet 1 department in intake pipe 4, and guide vane 71 sets up in baffle 7 lateral surface, and the tail end of the directional intake pipe 4 of head end of blast pipe 5. A conical cover 6 is also arranged between the air inlet pipe 4 and the air outlet pipe 5. The conical cover 6 is in a hollow conical shape, the tip of the conical cover 6 points to the tail end of the air inlet pipe 4, and the bottom opening of the conical cover 6 points to the head end of the exhaust pipe 5.

The straight-flow cyclone separator is provided with a shell 3, an air inlet pipe 4, an exhaust pipe 5 and a conical cover 6 are arranged in the shell 3, and an air inlet 1 and an air outlet 2 penetrate through the side wall of the shell 3 and extend out of the shell 3.

The existing straight-flow cyclone dust collector utilizes the rotation of airflow to enable impurities in the airflow to be centrifuged to the periphery, the gas at the central part is taken and conveyed to the next working procedure, the impurities at the peripheral part are discharged together with the gas, thus, a large amount of target gas loss is caused, the discharged impurity-containing gas needs extra cost for purification again, and the pressure loss is large. The natural gas transportation requires no gas discharge, and the straight-flow type cyclone separator provided by the application can seal impurity-containing gas at the peripheral part in the shell 3 through structural improvement. A drain opening 31 is provided at the bottom of the housing 3.

Further, along with the separation, when the air pressures inside and outside the air inlet pipe 4 and the air outlet pipe 5 reach balance, part of the impurity-containing gas can flow back through the impurity-removing channel to cause entrainment and back mixing.

The application provides a through-flow cyclone has broken traditional through-flow cyclone's design thinking, through design conical cover 6 with all intake pipe 4 send the gaseous all leading-in casing 3 of rotatory, carry out spiral acceleration under the effect of guide vane 71 in casing 3, gaseous and granule are separated under the effect of centrifugal force, wherein, granule impurity is earlier through slowing down with 4 inner wall friction impact of intake pipe, subside after slowing down with 3 inner wall friction impact of casing again, and gaseous blast pipe 5 in the baffling entering conical cover 6 bottom openings that passes through, because intake pipe 4 is different with the internal diameter of casing 3, the effect to the separation of impurity has effectively been strengthened like this.

Due to the limitation of the length of the pipe, some impurities moving close to the axis in the traditional straight-flow type cyclone separator have not yet come to move to the periphery and directly enter the exhaust pipe. This application is because the conical cover 6 shelters from between intake pipe 4 and blast pipe 5 for this phenomenon is thoroughly avoided, and the impurity of motion on the axis can be forced to push away and keep away from the axle center after meetting conical cover 6, subsides through the rotatory centrifugal separation of air current again.

The present embodiment is mainly different from the previous embodiment in that: the air inlet 1 is arranged at the bottom of the shell 3, and the air outlet is arranged at the top of the shell 3. Through the inversion setting, the direction of motion of air current is opposite with the settlement direction of impurity, and impurity descends under the effect of gravity after being thrown away intake pipe 4, because intake pipe 4 outside air current velocity is very little, impurity can not smugglied secretly by the air current like this, makes the impurity of being separated out can not form the secondary and back mixes.

The head end of the exhaust pipe 5 protrudes into the bottom opening of the conical cover 6. Because the air current is in the rotation state all the time in whole device, stretch into the bottom opening of conical cover 6 with the head end of blast pipe 5 in can let gas entering blast pipe 5 before through the centrifugal separation of one section conical surface inner wall again, so form multi-stage separation, make gas through many times separation effect, improve separation efficiency.

The side wall of the air inlet pipe 4 is provided with a side seam 41, and the side seam 41 is arranged on the pipe wall of the air inlet pipe 4 along the same spiral line direction with the air flow moving direction. More than one side slit 41 is provided, and more than one side slit 41 is symmetrically provided around the intake pipe 4. The design of the side seams 41 can help to quickly discharge impurities moving along the pipe wall in the air inlet pipe 4, and more importantly, enough wall surfaces are kept for collision and deceleration of the impurities while an air escape channel in the air inlet pipe 4 is increased, so that the pressure loss of the whole cyclone separator can be reduced.

The side seam 41 is arranged at the tail end of the air inlet pipe 4, the tip of the conical cover 6 extends into the tail end of the air inlet pipe 4, and the top end position of the tip of the conical cover 6 does not exceed the position of the side seam 41 close to one end of the air inlet 1. The point portion of conical cover 6 stretches into intake pipe 4 and can make whole device design compacter, form the annular space between the lateral wall of conical cover 6 and 4 tails of intake pipe, conical cover 6 has occupied 1 tail end center "invalid" region of air inlet like this, force the air current to peripheral motion, impurity in the process annular space messenger air current obtains effective separation, conical cover 6 point portion and the design of 41 position overlap of side seam, can effectively reduce because of conical cover 6 stretches into the air-resistor that intake pipe 4 brought, and more gas can promote the impurity of the separation on the 4 inner walls of intake pipe to discharge fast when flowing out by side seam 41.

A transition straight cylinder 61 is also arranged at the bottom opening of the conical cover 6. The design of the transition straight cylinder 61 can effectively reduce the pressure drop when the airflow passes through the outer side of the conical cover 6.

The head end of the exhaust pipe 5 is provided with an air inlet structure, the air inlet structure is composed of a conical cylinder section 52 and a straight cylinder section 51, one end of the conical cylinder section 52 with the smaller inner diameter is connected with the straight cylinder section 51, and one end of the conical cylinder section 52 with the larger inner diameter is connected with the exhaust pipe 5 main body. The design of the air inlet structure can give consideration to both the separation efficiency and the pressure drop loss.

As shown in fig. 4, in the present embodiment, the guide vane 71 may be a helical vane.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

The above embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.