CN110763611A - Aerosol particle beam injection device based on sheath air streaming principle - Google Patents

Abstract

Translated fromChinese

本发明公开了一种基于鞘气绕流原理的气溶胶粒子束喷射装置，包括喷射本体、气体进样管和零气进样管，喷射本体的内部设置有与其同轴的绕流腔，绕流腔贯穿所述喷射本体的第一端，喷射本体与第一端相对的第二端上设置有与绕流腔同轴的安装孔，安装孔连通外界与绕流腔，气体进样管的一端穿过安装孔伸入绕流腔内部并靠近第一端，气体进样管的另一端位于第二端的外部；喷射本体上靠近第二端的位置上设置有一连接口，连接口连接零气进样管和绕流腔。优点是：喷射装置能够将环境大气中杂乱的气溶胶团，约束呈单分散的成列排布的粒子束，约束后的气溶胶粒子束可有效进行后续的单颗粒物气溶胶光学、物理性质测量。

The invention discloses an aerosol particle beam spraying device based on the principle of sheath gas surrounding flow, comprising a spraying body, a gas sampling tube and a zero gas sampling tube. The flow cavity runs through the first end of the spray body, and the second end of the spray body opposite to the first end is provided with a mounting hole coaxial with the surrounding flow cavity. The installation hole communicates with the outside world and the surrounding flow cavity. One end protrudes into the flow chamber through the mounting hole and is close to the first end, and the other end of the gas sampling tube is located outside the second end; a connection port is provided on the spray body near the second end, and the connection port is connected to the zero gas inlet. Sample tube and bypass chamber. The advantage is that the jet device can constrain the messy aerosol groups in the ambient atmosphere to constrain the particle beams arranged in monodisperse rows, and the confinement aerosol particle beams can be used for subsequent single particle aerosol optical and physical properties measurement effectively .

Description

Translated fromChinese

一种基于鞘气绕流原理的气溶胶粒子束喷射装置An aerosol particle beam injection device based on the principle of sheath gas flow around

技术领域technical field

本发明涉及大气环境探测监测技术领域，尤其涉及一种基于鞘气绕流原理的气溶胶粒子束喷射装置。The invention relates to the technical field of atmospheric environment detection and monitoring, in particular to an aerosol particle beam spraying device based on the principle of sheath gas flow around.

背景技术Background technique

目前对大气污染的监测主要通过探测气溶胶团的性质的方式对污染过程中整体颗粒物光学等性质进行探测，常用的探测仪器有地基激光雷达、星载雷达探测等，这种对整体颗粒物光学性质进行测量的方式存在比较大的误差，精确的颗粒物性质可能会被遮挡和掩盖。At present, the monitoring of air pollution mainly detects the optical properties of the overall particulate matter during the pollution process by detecting the properties of the aerosol group. Commonly used detection instruments include ground-based lidar and spaceborne radar detection. There is considerable error in the way measurements are made, and precise particle properties may be obscured and masked.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于提供一种基于鞘气绕流原理的气溶胶粒子束喷射装置，从而解决现有技术中存在的前述问题。The purpose of the present invention is to provide an aerosol particle beam spraying device based on the principle of sheath gas flow around, so as to solve the aforementioned problems existing in the prior art.

为了实现上述目的，本发明采用的技术方案如下：In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

一种基于鞘气绕流原理的气溶胶粒子束喷射装置，包括喷射本体、气体进样管和零气进样管，所述喷射本体的内部设置有与其同轴的绕流腔，所述绕流腔贯穿所述喷射本体的第一端，所述喷射本体与所述第一端相对的第二端上设置有与所述绕流腔同轴的安装孔，所述安装孔连通外界与所述绕流腔，所述气体进样管的一端穿过所述安装孔伸入所述绕流腔内部并靠近所述第一端，所述气体进样管的另一端位于所述第二端的外部；所述喷射本体上靠近所述第二端的位置上设置有一连接口，所述连接口连接所述零气进样管和所述绕流腔。An aerosol particle beam spraying device based on the principle of sheath gas flow around, comprising a spray body, a gas sampling tube and a zero gas sampling tube. The flow cavity runs through the first end of the spray body, and a second end of the spray body opposite to the first end is provided with an installation hole coaxial with the flow cavity, and the installation hole communicates with the outside In the flow-around cavity, one end of the gas sampling tube extends into the flow-around cavity through the mounting hole and is close to the first end, and the other end of the gas sampling tube is located at the end of the second end. External; a connection port is provided on the spray body at a position close to the second end, and the connection port connects the zero-gas sampling tube and the bypass cavity.

优选的，所述喷射本体包括绕流管、安装固定块和喷射头，所述绕流管两端敞口且内部中空设置形成与其同轴的绕流腔，所述安装固定块与所述绕流管同轴设置在所述绕流管的一端，且所述安装固定块与所述绕流腔部分重合，令所述安装固定块的部分外周壁与所述绕流管的内周壁对应贴合；所述安装孔设置在所述安装固定块上。Preferably, the spray body includes a bypass tube, a mounting block and a spray head, the bypass tube is open at both ends and hollow inside to form a bypass cavity coaxial with the bypass tube, the mounting block is connected to the bypass tube The flow tube is coaxially arranged at one end of the bypass tube, and the mounting block and the bypass cavity are partially overlapped, so that part of the outer peripheral wall of the mounting block and the inner peripheral wall of the bypass tube correspond to each other the mounting hole is arranged on the mounting and fixing block.

优选的，所述喷射头呈圆台状，所述喷射头内部自其直径较大的一端向直径较小的一端形成宽度逐渐收窄的喷射腔，所述喷射腔宽度较大的一端与所述绕流管远离所述安装固定块的一端相连。Preferably, the spray head is in the shape of a truncated cone, and the inside of the spray head forms a spray cavity with a width gradually narrowing from an end with a larger diameter to an end with a smaller diameter, and the end of the spray cavity with a larger width is connected to the end of the spray cavity. One end of the bypass pipe away from the mounting block is connected.

优选的，所述绕流管包括同轴设置的形成段和连接段，所述连接段的直径小于所述形成段，且所述连接段远离所述形成段的一端与所述喷射头相连；所述绕流腔包括同轴设置且相互连通的第一气流段、第二气流段和第三气流段，所述第一气流段和所述第三气流段的宽度均匀，且所述第一气流段的直径大于所述第三气流段，所述第二气流段的宽度沿所述第一气流段向所述第二气流段的方向逐渐收窄；所述第一气流段和所述第二气流段位于所述形成段内，所述第三气流段位于所述连接段内。Preferably, the bypass tube comprises a coaxially arranged forming section and a connecting section, the diameter of the connecting section is smaller than the forming section, and an end of the connecting section away from the forming section is connected to the spray head; The flow-around cavity includes a first air flow section, a second air flow section and a third air flow section that are coaxially arranged and communicated with each other, the first air flow section and the third air flow section have uniform widths, and the first air flow section The diameter of the airflow segment is larger than that of the third airflow segment, and the width of the second airflow segment gradually narrows along the direction from the first airflow segment to the second airflow segment; the first airflow segment and the first airflow segment are The second gas flow section is located in the forming section, and the third gas flow section is located in the connecting section.

优选的，所述喷射头直径较大一端的周向边缘沿其轴线向外凸出延伸，形成连接环，所述连接环与所述绕流管同轴套设在所述连接段上，且所述连接环的内周壁与所述连接段的外周壁对应贴合。Preferably, the circumferential edge of the larger diameter end of the spray head protrudes outward along its axis to form a connecting ring, the connecting ring and the bypass tube are coaxially sleeved on the connecting section, and The inner peripheral wall of the connecting ring and the outer peripheral wall of the connecting segment are correspondingly abutted.

优选的，所述气体进样管的一端穿过所述安装孔和所述绕流腔，伸入所述喷射腔内，且该端与所述喷射头远离所述连接段的一端相距一定距离；所述气体进样管的另一端伸出所述安装固定块远离所述喷射头的一端。Preferably, one end of the gas sampling tube passes through the mounting hole and the bypass cavity, and extends into the injection cavity, and the end is at a certain distance from the end of the injection head away from the connecting section. ; The other end of the gas sampling tube protrudes from the end of the mounting block away from the jet head.

优选的，所述连接口设置在所述形成段上，所述连接口与所述第一腔室连通，所述连接口与所述安装固定块之间相距一定距离。Preferably, the connection port is provided on the forming section, the connection port communicates with the first chamber, and there is a certain distance between the connection port and the installation and fixing block.

本发明的有益效果是：1、喷射装置能够将环境大气中杂乱的气溶胶团，约束呈单分散的成列排布的粒子束，约束后的气溶胶粒子束可有效进行后续的单颗粒物气溶胶光学、物理性质测量。2、喷射装置体积小、机动性好，能够重复使用，具有使用方便、成本较低的优点，为大气颗粒物理化性质探测研究提供方便。3、喷射装置根据将实际大气中单分散的气溶胶颗粒约束成单颗粒排列的设计思路进行设计，通过建立合理的空气动力学、流体力学最优条件，使用“鞘气”绕流的方式将气溶胶粒子约束成单颗粒排列，约束后的气溶胶粒子束可有效进行后续的单颗粒物气溶胶光学、物理性质测量。4、利用该喷射装置，能够实现单个颗粒物光学等性质的实时探测，利于加深对于大气颗粒物理化性质的认识和理解，为有效治理环境污染提供支撑。The beneficial effects of the present invention are: 1. The spraying device can constrain the chaotic aerosol groups in the ambient atmosphere to constrain the particle beams arranged in a monodisperse row, and the constrained aerosol particle beams can effectively carry out subsequent single particle gas Sol optical, physical property measurement. 2. The ejector is small in size, good in maneuverability, can be reused, has the advantages of convenient use and low cost, and provides convenience for the detection and research of the physical and chemical properties of atmospheric particles. 3. The jet device is designed according to the design idea of constraining the monodisperse aerosol particles in the actual atmosphere into single particle arrangement. The aerosol particles are constrained into a single particle arrangement, and the constrained aerosol particle beam can be used to effectively measure the optical and physical properties of a single particle aerosol. 4. The use of the injection device can realize real-time detection of the optical properties of individual particles, which is conducive to deepening the understanding and understanding of the physical and chemical properties of atmospheric particles, and provides support for the effective control of environmental pollution.

附图说明Description of drawings

图1是本发明实施例中喷射装置的结构示意图。FIG. 1 is a schematic structural diagram of an injection device in an embodiment of the present invention.

图中：1、气体进样管；2、零气进样管；3、绕流管；4、安装固定块；5、喷射头；6、形成段；7、连接段；8、绕流腔；9、第一气流段；10、第二气流段；11、第三气流段；12、连接口；13、安装孔；14、喷射腔；15、连接环；16、气溶胶颗粒。In the figure: 1. Gas sampling tube; 2. Zero gas sampling tube; 3. Bypass tube; 4. Install fixed block; 9, the first air flow section; 10, the second air flow section; 11, the third air flow section; 12, the connection port; 13, the installation hole;

具体实施方式Detailed ways

为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施方式仅仅用以解释本发明，并不用于限定本发明。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

如图1所示，本实施例中提供了一种基于鞘气绕流原理的气溶胶粒子束喷射装置，包括喷射本体、气体进样管1和零气进样管2，所述喷射本体的内部设置有与其同轴的绕流腔8，所述绕流腔8贯穿所述喷射本体的第一端，所述喷射本体与所述第一端相对的第二端上设置有与所述绕流腔8同轴的安装孔13，所述安装孔13连通外界与所述绕流腔8，所述气体进样管1的一端穿过所述安装孔13伸入所述绕流腔8内部并靠近所述第一端，所述气体进样管1的另一端位于所述第二端的外部；所述喷射本体上靠近所述第二端的位置上设置有一连接口12，所述连接口12连接所述零气进样管2和所述绕流腔8。As shown in FIG. 1, this embodiment provides an aerosol particle beam spraying device based on the principle of sheath gas flow around, including a spraying body, agas sampling tube 1 and a zero gas sampling tube 2. The spraying body has a The inside is provided with a flow-aroundcavity 8 coaxial with it, the flow-aroundcavity 8 runs through the first end of the spray body, and a second end of the spray body opposite to the first end is provided with a flow-aroundcavity 8 . Acoaxial mounting hole 13 of theflow chamber 8 , themounting hole 13 communicates with the outside and thebypass chamber 8 , and one end of thegas sampling tube 1 extends into thebypass chamber 8 through themounting hole 13 and close to the first end, the other end of thegas sampling tube 1 is located outside the second end; a connectingport 12 is provided on the spray body near the second end, and the connectingport 12 Connect the zero gas sampling tube 2 and the surroundingflow chamber 8 .

本实施例中，所述喷射本体包括绕流管3、安装固定块4和喷射头5，所述绕流管3两端敞口且内部中空设置形成与其同轴的绕流腔8，所述安装固定块4与所述绕流管3同轴设置在所述绕流管3的一端，且所述安装固定块4与所述绕流腔8部分重合，令所述安装固定块4的部分外周壁与所述绕流管3的内周壁对应贴合；所述安装孔13设置在所述安装固定块4上。In this embodiment, the spray body includes abypass tube 3, a mounting block 4 and a spray head 5. Thebypass tube 3 is open at both ends and hollow inside to form abypass cavity 8 coaxial with it. The mounting block 4 and thebypass tube 3 are coaxially arranged at one end of thebypass tube 3, and the mounting block 4 is partially overlapped with thebypass cavity 8, so that the part of the mounting block 4 is partially overlapped. The outer peripheral wall is correspondingly fitted with the inner peripheral wall of thebypass tube 3 ; themounting hole 13 is arranged on the mounting and fixing block 4 .

本实施例中，所述喷射头5呈圆台状，所述喷射头5内部自其直径较大的一端向直径较小的一端形成宽度逐渐收窄的喷射腔14，所述喷射腔14宽度较大的一端与所述绕流管3远离所述安装固定块4的一端相连。In this embodiment, the spray head 5 is in the shape of a truncated cone, and the inside of the spray head 5 forms aspray cavity 14 with a gradually narrowing width from the end with the larger diameter to the end with the smaller diameter. The large end is connected to the end of thebypass tube 3 away from the mounting block 4 .

本实施例中，所述绕流管3包括同轴设置的形成段6和连接段7，所述连接段7的直径小于所述形成段6，且所述连接段7远离所述形成段6的一端与所述喷射头5相连；所述绕流腔8包括同轴设置且相互连通的第一气流段9、第二气流段10和第三气流段11，所述第一气流段9和所述第三气流段11的宽度均匀，且所述第一气流段9的直径大于所述第三气流段11，所述第二气流段10的宽度沿所述第一气流段9向所述第二气流段10的方向逐渐收窄；所述第一气流段9和所述第二气流段10位于所述形成段6内，所述第三气流段11位于所述连接段7内。In this embodiment, thebypass tube 3 includes a coaxially arranged forming section 6 and a connectingsection 7 , the diameter of the connectingsection 7 is smaller than that of the forming section 6 , and the connectingsection 7 is far from the forming section 6 . One end is connected to the jet head 5; the flow-aroundcavity 8 includes a first air flow section 9, a secondair flow section 10 and a third air flow section 11 that are coaxially arranged and communicated with each other. The first air flow section 9 and The width of the third airflow segment 11 is uniform, and the diameter of the first airflow segment 9 is larger than that of the third airflow segment 11 , and the width of thesecond airflow segment 10 extends along the first airflow segment 9 toward the The direction of the secondair flow section 10 is gradually narrowed; the first air flow section 9 and the secondair flow section 10 are located in the forming section 6 , and the third air flow section 11 is located in the connectingsection 7 .

本实施例中，所述喷射头5直径较大一端的周向边缘沿其轴线向外凸出延伸，形成连接环15，所述连接环15与所述绕流管3同轴套设在所述连接段7上，且所述连接环15的内周壁与所述连接段7的外周壁对应贴合。In this embodiment, the circumferential edge of the larger diameter end of the spray head 5 protrudes and extends outward along its axis to form a connectingring 15 , and the connectingring 15 and thebypass tube 3 are coaxially sleeved at the on the connectingsegment 7 , and the inner peripheral wall of the connectingring 15 is in a corresponding fit with the outer peripheral wall of the connectingsegment 7 .

本实施例中，所述气体进样管1的一端穿过所述安装孔13和所述绕流腔8，伸入所述喷射腔14内，且该端与所述喷射头5远离所述连接段7的一端相距一定距离；所述气体进样管1的另一端伸出所述安装固定块4远离所述喷射头5的一端。In this embodiment, one end of thegas sampling tube 1 passes through theinstallation hole 13 and thebypass cavity 8 and extends into theinjection cavity 14 , and the end and the injection head 5 are far away from the One end of the connectingsection 7 is at a certain distance; the other end of thegas sampling tube 1 protrudes from the end of the mounting block 4 away from the jet head 5 .

本实施例中，所述连接口12设置在所述形成段6上，所述连接口12与所述第一腔室连通，所述连接口12与所述安装固定块4之间相距一定距离。In this embodiment, theconnection port 12 is provided on the forming section 6 , theconnection port 12 is communicated with the first chamber, and theconnection port 12 and the mounting block 4 are separated by a certain distance .

本实施例中，零气经零气进样管2通过连接口12进入绕流腔8内，并经绕流腔8腔壁约束形成环绕气流，之后依次通过第一气流段9、第二气流段10和第三气流段11，在喷射腔14内约束气体进样管1中喷射出的气溶胶样本气体，使其形成单颗粒排列的粒子束。所述气体进样管1伸入所述喷射腔14内的一端与所述喷射头5远离所述连接段7的一端(也就是宽度较窄的一端)相距一定距离，这样能够使气体进样管1内的气溶胶样本气体与零气绕流在喷射腔14内充分约束，形成单颗粒排列的粒子束。In this embodiment, the zero gas enters the surroundingflow chamber 8 through theconnection port 12 through the zero gas sampling tube 2, and is constrained by the wall of the surroundingflow chamber 8 to form a surrounding air flow, and then passes through the first air flow section 9 and the second air flow in sequence. Thesection 10 and the third gas flow section 11 confine the aerosol sample gas injected from thegas sampling tube 1 in theinjection cavity 14 to form a particle beam with single particle arrangement. The end of thegas injection tube 1 extending into theinjection cavity 14 is separated from the end of the injection head 5 away from the connecting section 7 (that is, the narrower end), so that the gas injection can be performed. The aerosol sample gas and the surrounding flow of the zero gas in thetube 1 are sufficiently confined in theinjection chamber 14 to form a particle beam with a single particle arrangement.

本实施例中，所述气体进样管1远离所述喷射头5的一端可以接环境大气，用于将环境大气中的单分散的气溶胶颗粒16约束成单颗粒排列的粒子束；或者，所述气体进样管1远离所述喷射头5的一端连接特定气溶胶颗粒16物，将单分散的特定气溶胶颗粒16物约束呈单颗粒排列的粒子束。In this embodiment, one end of thegas sampling tube 1 away from the jet head 5 can be connected to the ambient atmosphere, so as to constrain themonodisperse aerosol particles 16 in the ambient atmosphere into a particle beam with a single particle arrangement; or, The end of thegas sampling tube 1 away from the jet head 5 is connected withspecific aerosol particles 16 , and the monodispersedspecific aerosol particles 16 are bound to a particle beam arranged in a single particle.

本实施例中，所述零气进样管2通入不含气溶胶颗粒16的洁净空气(零气)。In this embodiment, clean air (zero gas) that does not containaerosol particles 16 is passed through the zero gas sampling tube 2 .

本实施例中，所述喷射装置的工作过程如下：从气体进样管1远离所述喷射头5的一端通入待测的气溶胶样本气体，从零气进样管2通入不含气溶胶颗粒16的洁净气体，零气在绕流腔8内经腔壁的约束形成环绕气流，之后在喷射腔14内，含有气溶胶颗粒16的气体经洁净的零气绕流约束，形成单颗粒排列的粒子束，并经喷射头5宽度较窄的一端喷射而出。In this embodiment, the working process of the injection device is as follows: the aerosol sample gas to be measured is introduced from the end of thegas sampling tube 1 away from the injection head 5 , and the gas-free sample gas is introduced from the zero gas sampling tube 2 The clean gas of theaerosol particles 16, the zero gas is constrained by the cavity wall in the surroundingflow cavity 8 to form a surrounding airflow, and then in theinjection cavity 14, the gas containing theaerosol particles 16 is constrained by the clean zero gas flow to form a single particle arrangement The particle beam is sprayed out through the narrower end of the spray head 5 .

本实施例中，通过零气绕流的方式，对样本气溶胶颗粒16进行约束，形成束腰和单分散的粒子束，用于后续对单颗粒物光学、物理性质的测量。In this embodiment, thesample aerosol particles 16 are constrained by means of zero air flow around to form a beam waist and a monodisperse particle beam for subsequent measurement of the optical and physical properties of single particles.

通过采用本发明公开的上述技术方案，得到了如下有益的效果：By adopting the above-mentioned technical scheme disclosed by the present invention, the following beneficial effects are obtained:

本发明提供了一种基于鞘气绕流原理的气溶胶粒子束喷射装置，喷射装置根据将实际大气中单分散的气溶胶颗粒约束成单颗粒排列的设计思路进行设计，通过建立合理的空气动力学、流体力学最优条件，使用“鞘气”绕流的方式将气溶胶粒子约束成单颗粒排列，约束后的气溶胶粒子束可有效进行后续的单颗粒物气溶胶光学、物理性质测量。喷射装置体积小、机动性好，能够重复使用，具有使用方便、成本较低的优点，为大气颗粒物理化性质探测研究提供方便。利用该喷射装置，能够实现单个颗粒物光学等性质的实时探测，利于加深对于大气颗粒物理化性质的认识和理解，为有效治理环境污染提供支撑。The invention provides an aerosol particle beam spraying device based on the principle of sheath gas flow around. The optimal conditions of science and fluid mechanics are used to constrain the aerosol particles into a single particle arrangement by means of "sheath gas" flow around. The ejector is small in size, good in maneuverability, can be reused, has the advantages of convenient use and low cost, and provides convenience for the detection and research of the physical and chemical properties of atmospheric particles. The use of the injection device can realize real-time detection of optical and other properties of a single particle, which is conducive to deepening the understanding and understanding of the physical and chemical properties of atmospheric particles, and provides support for the effective control of environmental pollution.

以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视本发明的保护范围。The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (7)

1. An aerosol particle beam injection device based on sheath gas circumfluence principle is characterized in that: the jet device comprises a jet body, a gas sample inlet pipe and a zero gas sample inlet pipe, wherein a bypass cavity coaxial with the jet body is arranged in the jet body, the bypass cavity penetrates through a first end of the jet body, a mounting hole coaxial with the bypass cavity is formed in a second end, opposite to the first end, of the jet body, the mounting hole is communicated with the outside and the bypass cavity, one end of the gas sample inlet pipe penetrates through the mounting hole and extends into the bypass cavity and is close to the first end, and the other end of the gas sample inlet pipe is positioned outside the second end; and a connecting port is arranged on the position, close to the second end, of the injection body and is connected with the zero-gas sample inlet pipe and the bypass cavity.

2. The sheath gas bypass flow principle-based aerosol particle beam injection device according to claim 1, wherein: the injection body comprises a flow winding pipe, an installation fixing block and an injection head, wherein two ends of the flow winding pipe are open, the interior of the flow winding pipe is hollow, and a flow winding cavity coaxial with the flow winding pipe is formed; the mounting hole is formed in the mounting fixing block.

3. The sheath gas bypass flow principle-based aerosol particle beam injection device according to claim 2, wherein: the injection head is round platform form, the inside injection chamber that narrows gradually of diameter is formed from the great one end of its diameter to the less one end of diameter of injection head, the great one end of injection chamber width with keep away from around the flow tube the one end of installation fixed block links to each other.

4. The sheath gas bypass flow principle-based aerosol particle beam injection device according to claim 3, wherein: the flow surrounding pipe comprises a forming section and a connecting section which are coaxially arranged, the diameter of the connecting section is smaller than that of the forming section, and one end of the connecting section, which is far away from the forming section, is connected with the injection head; the bypass cavity comprises a first airflow section, a second airflow section and a third airflow section which are coaxially arranged and are mutually communicated, the widths of the first airflow section and the third airflow section are uniform, the diameter of the first airflow section is larger than that of the third airflow section, and the width of the second airflow section is gradually narrowed along the direction from the first airflow section to the second airflow section; the first and second gas flow sections are located in the forming section and the third gas flow section is located in the connecting section.

5. The sheath gas bypass flow principle-based aerosol particle beam injection device according to claim 4, wherein: the circumference edge of the great one end of injector head diameter extends along its axis outside protrusion, forms the go-between, the go-between with around the coaxial cover of flow tube and establish on the linkage segment, just the internal perisporium of go-between with the periphery wall of linkage segment corresponds the laminating.

6. The sheath gas bypass flow principle-based aerosol particle beam injection device according to claim 5, wherein: one end of the gas sample inlet pipe penetrates through the mounting hole and the flow bypassing cavity and extends into the spraying cavity, and the end is away from one end of the spraying head far away from the connecting section by a certain distance; the other end of the gas sampling pipe extends out of one end, far away from the injection head, of the mounting fixing block.

7. The sheath gas bypass flow principle-based aerosol particle beam injection device according to claim 6, wherein: the connecting port is arranged on the forming section and communicated with the first cavity, and a certain distance is reserved between the connecting port and the mounting fixing block.

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