Online backwashing type aerosol generator

Abstract

The invention provides an on-line backwashing type aerosol generator, which comprises a rotary base, an aerosol generator, a filter screen, a filter screen and a filter screen, wherein a sprayer is arranged on the rotary base; the spray intercepting ring is rotationally arranged on the rotating base, and the spray intercepting ring is used for intercepting aerosol sprayed by the sprayer; the spray interception ring is arranged around the sprayer in a surrounding manner; the extension line where the spraying opening of the sprayer is located intersects with the spraying intercepting ring. The pipe body is used for containing a sample solution or a cleaning solution, and the pipe body is detachably connected with the spray interception ring; according to the equipment, the rotatable spray intercepting ring is arranged, so that the spray intercepting ring can rotate relative to the sprayer, when cleaning liquid is placed in the pipe body, the sprayer can be used for spraying and cleaning the positions such as the spray intercepting ring, an aerosol generator does not need to be disassembled, and the cleaning efficiency is improved. Residual substances in the aerosol generator can be reduced, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of analytical instruments, more particularly, it relates to an online backflushing aerosol generator. BACKGROUND

[0002] The fine droplets generated by the aerosol generator are usually directly delivered into a mass spectrometer or other high-precision detection instrument for real-time qualitative and quantitative analysis of inorganic salts, trace organic matter, proteins and other components in liquid samples; in these applications, the level of baseline noise and background signal directly determines the detection limit and quantitative accuracy, and even a trace amount of residue attachment will cause a "memory effect" in the next measurement, i.e., residual salt crystals or organic films release background peaks when re-atomized, interfering with the intensity and shape of the target ion peak, resulting in quantitative drift and component misjudgment, and in severe cases, even unable to identify low-abundance or multi-component samples. Therefore, for high-sensitivity instruments such as mass spectrometers, achieving zero residue or ultra-low residue cleaning of the aerosol generator is not only a requirement for improving throughput, but also a key prerequisite for ensuring analysis reliability and meeting ppb (10 -9 ) or even ppt (10 -12 ) level detection.

[0003] After high-concentration salt solutions, organic reagents or biological samples are atomized, a large amount of non-volatile or poorly soluble substances often remain on the inner walls of the container and the atomization chamber of the traditional generator. If ultrasonic cleaning, chemical soaking or cleaning after disassembling the entire machine are relied on, not only the cleaning period is as long as several minutes to several tens of minutes, but also the shell, pipe fittings and sealing elements need to be disassembled, which is cumbersome to operate and easy to cause wear or loss of parts, increasing maintenance costs and prolonging instrument downtime. More importantly, incomplete residue cleaning can also cause cross-contamination, seriously affecting the accuracy and repeatability of subsequent sample measurements. At present, there is no automatic technology on the market that can quickly and completely clean the aerosol generator container without disassembling any components. The traditional method is low in efficiency and limited in throughput, and a new solution that takes into account efficient cleaning, simple structure and low-cost maintenance is urgently needed. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the present application is to provide an online backflushing aerosol generator to overcome the shortcomings of the prior art aerosol generator, which is complex in structure and difficult to disassemble and clean.

[0005] The technical problem of the present application is solved by the following technical scheme: the online backflushing type aerosol generator comprises a rotating base provided with a sprayer, a spray interception ring rotationally arranged on the rotating base and used for intercepting the aerosol sprayed by the sprayer, the spray interception ring is arranged around the sprayer, the extension line of the spray port of the sprayer intersects with the spray interception ring, and a tube body used for containing sample solution or cleaning solution and detachably connected with the spray interception ring.

[0006] In one embodiment, the axis of the tube body and the axis of the spray interception ring are arranged along a first direction, and the tube body and the spray interception ring are coaxially arranged.

[0007] In one embodiment, the sprayer specifically comprises a sprayer body and a liquid suction pipe, the sprayer body is fixedly connected with the rotating base, the sprayer body is provided with an air inlet pipe and an air outlet pipe, and the spray port, the air inlet pipe, the air outlet pipe and the liquid suction pipe are in communication with each other.

[0008] In one embodiment, the air outlet pipe is arranged along a second direction, and the second direction intersects with the first direction.

[0009] In one embodiment, the second direction is perpendicular to the first direction.

[0010] In one embodiment, further comprising a fixed cover, the fixed cover is fixedly connected with the spray interception ring, the axis of the fixed cover is arranged along the first direction, the fixed cover, the spray interception ring and the tube body are coaxially arranged, and the fixed cover, the spray interception ring and the tube body can synchronously rotate relative to the rotating base.

[0011] In one embodiment, the tube body is threadedly connected with the fixed cover.

[0012] In one embodiment, the outer surface of the spray interception ring is provided with an abutting protrusion in the circumferential direction, the abutting protrusion has opposite first and second faces in the first direction, and the opening edge of the tube body abuts against the first face of the abutting protrusion.

[0013] In one embodiment, a sealing ring is further arranged between the opening edge of the tube body and the first face of the abutting protrusion.

[0014] In one embodiment, the tube body is specifically made of polypropylene plastic material.

[0015] In summary, the online backflushing aerosol generator has the following beneficial effects: the spray interception ring can be rotated relative to the sprayer by setting the spray interception ring capable of rotating, when the cleaning liquid is placed in the pipe body, the spray interception ring and other positions can be sprayed and cleaned by the sprayer, the aerosol generator does not need to be disassembled, the residual substances in the aerosol generator can be reduced, and the detection efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a first angle sectional view of the online backflushing aerosol generator of the application. Figure 2 It is a second angle sectional view of the online backflushing aerosol generator of the application. Figure 3 It is Figure 1 the enlarged schematic view of the E part in In the figure: 1, rotating base; 101, air supply port; 102, aerosol outlet; 103, aerosol interception cover; 104, pressure relief port; 2, spray interception ring; 21, abutment protrusion; 22, sealing ring; 3, sprayer; 31, sprayer body; 32, air inlet pipe; 33, venturi tube; 34, spray channel; 35, liquid suction pipe; 36, atomized liquid droplets; 4, pipe body; 41, cleaning liquid; 5, fixed cover. DETAILED DESCRIPTION

[0017] In the application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances. The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0018] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions are only for illustrative purposes, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0020] Embodiment one In order to illustrate the device of the present application, first, the directions are illustrated. As shown in Figure 1 , Figure 2 , the first direction is the up-down direction, the second direction is the left-right direction, and the third direction is the front-rear direction. In some embodiments, the first direction, the second direction and the third direction are perpendicular to each other. In some embodiments, the first direction, the second direction and the third direction are preferably perpendicular to each other.

[0021] Figure 1 The first cross-sectional view in the embodiments of the present application is Figure 2 , the second cross-sectional view of the present application is Figure 1 , Figure 2 The cross sections in the two pictures both pass through the axis of the device, and the two cross sections are perpendicular to each other. Therefore, Figure 1 , the left-right direction in Figure 2 is the direction perpendicular to the picture, Figure 2 , the front-rear direction in Figure 1 is the direction perpendicular to the picture.

[0022] To solve the problem that the existing aerosol generator needs to be disassembled when cleaning, otherwise it is easy to produce pollution, baseline noise and other problems, the present embodiment provides an online backflushing type aerosol generator, as shown in Figure 1As shown, it comprises: a rotating base 1, in this embodiment, the rotating base 1 is used to provide positioning and connecting functions for the device, and a gas supply port 101, a sprayer 3 and an aerosol outlet 102 are arranged on the rotating base 1, wherein the sprayer 3 is specifically a Venturi sprayer 3, the gas supply port 101 is used to provide high-speed airflow for the Venturi sprayer 3, and the Venturi sprayer 3 generates fine spray droplets by sucking sample liquid in the tube body 4 under the driving of the high-speed airflow, wherein the large-particle-size droplets will impact on the tube wall under the action of inertia, and the small-particle-size droplets have small inertia and can therefore escape from the aerosol outlet 102 in the form of aerosol. In order to avoid the large-particle-size droplets from leaking from the aerosol outlet 102, in the second direction, the aerosol outlet 102 is not in the same direction as the spraying direction of the sprayer 3, and there is a certain angle between the spraying direction of the sprayer 3 and the axis of the aerosol outlet 102, as shown in Figure 1 、 Figure 2 As shown, the spraying direction of the sprayer 3 is towards the right side, and the axis of the aerosol outlet 102 is close to the rear side. In some embodiments, the angle between the axis of the aerosol outlet 102 and the spraying direction of the sprayer 3 can be adaptively adjusted to maintain the balance between the aerosol output and the output of large-particle-size droplets.

[0023] In some embodiments, a blocking device for blocking the spray droplets and preventing the large-particle-size droplets from escaping from the aerosol outlet 102 is arranged on the rotating base 1, and the blocking device is arranged in alignment with the spraying direction of the sprayer 3 so that the spray can accurately impact on the blocking device. In some embodiments, the blocking device is specifically a spray interception ring 2, which is arranged around the sprayer 3 so that the sprayer 3 can be blocked by the spray interception ring 2 in any direction. In the first direction, the blocking device extends downward from the lower surface of the rotating base 1, and the lower edge of the blocking device is closer to the lower side than the lower edge of the spraying range of the sprayer 3. In actual use, the water mist range of the Venturi sprayer 3 gradually increases from left to right, and its shape is close to a cone, so it is necessary to extend the lower edge of the blocking device downward by a distance to completely intercept the conical water mist.

[0024] The Venturi atomizer 3 can not only suck the sample liquid by the high-speed airflow, but also can still have a large speed after leaving the Venturi atomizer 3, so that the atomizer 3 can be used to flush the spraying part if the sample liquid is replaced by the cleaning liquid 41, and the cleaning liquid 41 can be ethanol, deionized water or other professional cleaning agent. The air supply port 101 on the rotating base 1 is connected with an external high-pressure gas source through a connecting piece, and a through hole extending along the third direction is arranged in the rotating base 1 to deliver the high-pressure gas source to the atomizer 3. The atomizer 3 comprises an atomizer body 31 fixedly arranged on the rotating base, so that the atomizer 3 and the rotating base can be sealingly connected, the atomizer body 31 is internally provided with an air inlet pipe 32 extending up and down along the first direction and an air outlet pipe extending left and right along the second direction, and the atomizer body 31 is further provided with a liquid suction pipe 35 extending along the first direction; the liquid suction pipe 35 extends downward from the bottom of the atomizer body 31 to below the liquid level of the sample liquid or the cleaning liquid 41. The spraying port, the air inlet pipe 32, the air outlet pipe and the liquid suction pipe 35 are in communication with each other, and the air outlet pipe is divided into two sections, the first section is a Venturi tube 33 with a relatively narrow inner diameter, and the second section is a spraying channel 34 with a relatively wide inner diameter; after the air inlet pipe 32 receives the high-flow and high-pressure gas, the gas enters the Venturi tube 33, the volume of the gas is compressed and the flow rate thereof is rapidly increased, the volume of the high-speed gas is suddenly increased in the spraying channel 34 to form a negative pressure, so that the liquid in the liquid suction pipe 35 can be sucked upward and mixed with the high-speed airflow to be sprayed from the spraying channel 34 to form an aerosol.

[0025] Further, the tube body 4 is arranged for storing the cleaning liquid 41 or the sample liquid, and in the embodiment, the tube body 4 is made of polypropylene plastic material or other organic synthetic material to reduce the replacement cost of the tube body 4. In the embodiment, the axis of the tube body 4 extends along the first direction, and the liquid suction pipe 35 extends along the first direction and can be deep into the bottom of the sample liquid.

[0026] Further, the fixed cover 5 is arranged for fixing the tube body 4, the fixed cover 5 is provided with an internal thread, the tube body 4 is provided with an external thread, and the tube body 4 and the fixed cover 5 are threadedly connected. The fixed cover 5 is arranged around the spraying interception ring 2 and is fixedly connected with the spraying interception ring 2, the axis of the fixed cover 5 extends along the first direction, the fixed cover 5, the spraying interception ring 2 and the tube body 4 are coaxially arranged, and the fixed cover 5, the spraying interception ring 2 and the tube body 4 can synchronously rotate relative to the rotating base 1.

[0027] Further, the outer surface of the spray interception ring 2 extends in the circumferential direction away from the axis to form an abutting protrusion 21. In the first direction, the abutting protrusion has opposite first and second faces, wherein the first face is located close to the lower end and the second face is located close to the upper end. When the pipe body 4 and the fixing cover 5 are threadedly connected to each other, the opening edge of the pipe body 4 abuts against the first face of the abutting protrusion 21 to form a sealing structure, and the fixing cover 5 and the second face are connected to each other to form a sealing structure. In some embodiments, there is a sealing ring 22 between the edge of the pipe body 4 and the first face to improve the sealing effect.

[0028] Embodiment Two In this embodiment, a cleaning process of the aerosol generator is further provided. First, the pipe body 4 containing the sample liquid is disassembled. The pipe body 4 is made of polypropylene plastic and is a disposable consumable. A cleaning liquid 41 corresponding to the sample, such as ethanol, deionized water or other cleaning liquid 41, is added in the new pipe body 4. Then, the new pipe body 4 is installed on the fixing cover 5 to achieve fixed connection of the pipe body 4.

[0029] The gas is delivered to the sprayer 3, and the mixed state of the cleaning liquid 41 and the gas is used to flush the parts covered by the spray. Since the spray generated during the cleaning process and the spray generated during the test process overlap each other, the atomized droplets 36 formed by the cleaning liquid 41 can effectively flush the parts contaminated by the sample. Further, in order to achieve all-round flushing, the spray interception ring 2 can also be rotated so that different positions of the spray interception ring 2 are aligned with the spray port to achieve all-round flushing. The residues attached to the spray interception ring 2 are mixed with the cleaning liquid 41 and then flow into the pipe body 4, which is replaced together with the pipe body 4.

[0030] In order to avoid the aerosol from escaping from the aerosol outlet 102 position to the environment during the flushing process, an aerosol interception cover 103 is arranged at the aerosol outlet 102 position. The aerosol interception cover 103 is provided with an aerosol filter element, which can filter the aerosol.

[0031] A pressure relief port is also provided on the rotating base to prevent excessive pressure in the container from causing danger.

[0032] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the present disclosure.

[0033] The above merely describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-described embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. An online backflushing aerosol generator, characterized in that, include: A rotating base, on which a sprayer is mounted; A spray interception ring is rotatably mounted on the rotating base. The spray interception ring is used to intercept the aerosol sprayed by the sprayer. The spray interception ring is arranged around the sprayer. The extension line of the spray nozzle of the sprayer intersects the spray interception ring. The tube body is used to contain the sample solution or cleaning solution, and the tube body is detachably connected to the spray interception ring.

2. The online backflushing aerosol generator according to claim 1, characterized in that, The axis of the pipe body and the axis of the spray interception ring are both arranged along the first direction, and the pipe body and the spray interception ring are coaxially arranged.

3. The online backflushing aerosol generator according to claim 2, characterized in that, The sprayer specifically includes: a sprayer body and a liquid extraction tube; The sprayer body is fixedly connected to the rotating base; The sprayer body is provided with an air inlet pipe and an exhaust pipe, and the spray nozzle, the air inlet pipe, the exhaust pipe and the liquid extraction pipe are interconnected.

4. The online backflushing aerosol generator according to claim 3, characterized in that, The exhaust pipe is arranged along a second direction; the second direction intersects with the first direction.

5. The online backflushing aerosol generator according to claim 4, characterized in that, The second direction is perpendicular to the first direction.

6. The online backflushing aerosol generator according to claim 5, characterized in that, Also includes: Fixed cover; The fixed cover is fixedly connected to the spray interception ring. The axis of the fixed cover is set along the first direction. The fixed cover, the spray interception ring and the tube body are coaxially arranged. The fixed cover, the spray interception ring and the tube body can rotate synchronously relative to the rotating base.

7. The online backflushing aerosol generator according to claim 6, characterized in that, The tube body is threadedly connected to the fixed cover.

8. The online backflushing aerosol generator according to claim 7, characterized in that, The outer surface of the spray interception ring is provided with abutting protrusions along the circumferential direction. In the first direction, the abutting protrusions have opposing first and second surfaces. The opening edge of the tube body abuts against the first surface of the abutting protrusion.

9. The online backflushing aerosol generator according to claim 8, characterized in that, A sealing ring is also provided between the opening edge of the tube body and the first surface of the abutting protrusion.

10. The online backflushing aerosol generator according to any one of claims 1-9, characterized in that, The tube body is specifically made of polypropylene plastic.

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