A system for automatically rinsing the inner wall of a test tube during a concentration process

Abstract

The present invention provides a system for automatically rinsing the inner wall of a test tube during the concentration process, which includes a controller, a nozzle rinsing device, a solvent inlet device, a high-pressure gas inlet device, and a multi-channel solenoid valve. The high-pressure gas inlet device is connected to the first interface of the multi-channel solenoid valve through an air inlet pipeline, the solvent inlet device is connected to the second interface of the multi-channel solenoid valve through a liquid inlet pipeline, and the nozzle rinsing device is connected to the third interface of the multi-channel solenoid valve through a liquid outlet pipeline. The first interface is controlled to open and close by a first solenoid valve inside the multi-channel solenoid valve, and the second interface is controlled to open and close by a second solenoid valve inside the multi-channel solenoid valve. The controller is used to control the operation of the first solenoid valve and the second solenoid valve. The automatic spraying and rinsing of the inner wall of containers such as test tubes is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sample concentration, and particularly to a system for automatically rinsing the inner wall of a test tube during the concentration process. Background Art

[0002] A concentrator concentrates a sample by blowing nitrogen gas onto the surface of the heated sample, and has the characteristics of time saving, convenient operation, easy control, etc., and can quickly obtain the expected results. It is widely used in industries such as pesticide residue analysis, commodity inspection, food, environment, pharmaceuticals, biological products, etc. and in sample preparation for liquid phase, gas phase and mass spectrometry analysis.

[0003] When using a test tube or the like to hold a quantitative sample, since it is inevitable that water droplets or the like remain on the inner wall of the test tube after cleaning, it is necessary to rinse it with a solvent before concentration. At present, all concentrators only have one function of nitrogen blowing, and it is necessary to manually rinse the inner wall of the test tube before the nitrogen blowing concentration starts, resulting in low work efficiency and easy contamination of the sample. Summary of the Invention

[0004] The purpose of the present invention is to provide a system for automatically rinsing the inner wall of a test tube during the concentration process, which realizes automatic spraying and rinsing of the inner wall of containers such as test tubes.

[0005] In order to achieve the above purpose, the technical solution of the present invention is as follows:

[0006] A system for automatically rinsing the inner wall of a test tube during the concentration process includes a controller, a spray head rinsing device, a solvent inlet device, a high-pressure gas inlet device, and a multi-channel solenoid valve. The high-pressure gas inlet device is connected to the first interface of the multi-channel solenoid valve through an air inlet pipeline, the solvent inlet device is connected to the second interface of the multi-channel solenoid valve through a liquid inlet pipeline, and the spray head rinsing device is connected to the third interface of the multi-channel solenoid valve through a liquid outlet pipeline. The first interface is controlled to open and close by a first solenoid valve in the multi-channel solenoid valve, the second interface is controlled to open and close by a second solenoid valve in the multi-channel solenoid valve, and the controller is used to control the operation of the first solenoid valve and the second solenoid valve.

[0007] In some embodiments, the spray head rinsing device includes a plurality of rinsing spray heads. A switching valve is further connected between the spray head rinsing device and the third interface. The switching valve has an inlet channel and a plurality of outlet channels. The controller is connected to the switching valve for controlling the connection between the inlet channel and any one of the outlet channels. The inlet channel is communicated with the third interface through a liquid outlet pipeline, and the plurality of rinsing spray heads are communicated with the corresponding outlet channels through a plurality of liquid inlet pipelines.

[0008] In some of these embodiments, a multi-channel transfer device is further connected between the nozzle rinsing device and the switching valve. The multi-channel transfer device has a number of channel adapters. After a number of the rinsing nozzles are connected to the corresponding channel adapters through a liquid inlet pipeline, they are then connected to the corresponding outlet channels.

[0009] In some of these embodiments, the high-pressure gas inlet device includes a pressure regulating valve and an inlet solenoid valve. The pressure regulating valve and the inlet solenoid valve are sequentially installed on the inlet pipeline according to the inlet gas direction. The controller is used to control the operation of the inlet solenoid valve.

[0010] In some of these embodiments, the solvent inlet device includes an injection pump with extraction and injection functions and a container for storing the solvent. The container is connected to the second interface through a liquid inlet pipeline. The multi-channel solenoid valve also has a fourth interface and a third solenoid valve. The injection pump is connected to the fourth interface through a liquid inlet pipeline. The fourth interface is connected to the first interface, the second interface, and the third interface. The third solenoid valve is used to control the opening and closing of the third interface. The controller is used to control the operation of the injection pump and the third solenoid valve.

[0011] In some of these embodiments, the injection pump is a metering injection pump.

[0012] In some of these embodiments, the nozzle rinsing device includes a rinsing nozzle. The rinsing nozzle has a spraying end face, and the spraying end face is in the shape of a cone or a frustum of a cone with a gradually decreasing diameter. A number of spray openings are evenly distributed on the spraying end face, and the spray openings are arranged outward.

[0013] In some of these embodiments, the rinsing nozzle is cylindrical, and the spraying end face is formed by removing part of the material from one end face of the cylinder. The orientation of the spray openings is perpendicular to the spraying end face. A liquid inlet hole is formed in the center of the rinsing nozzle, and a number of the spray openings are all connected to the liquid inlet hole.

[0014] In some of these embodiments, an electric control box is further included. The controller, the solvent inlet device, the high-pressure gas inlet device, and the multi-channel solenoid valve are installed in the electric control box. At least some of the pipeline connection interfaces of the solvent inlet device, the high-pressure gas inlet device, and the multi-channel solenoid valve are located on the side of the electric control box.

[0015] After adopting the above solution, for a system for automatically rinsing the test tube wall during the concentration process of the present invention, the nozzle rinsing device is controlled by the multi-channel solenoid valve to be connected to the solvent inlet device and the high-pressure gas inlet device, so as to achieve the rinsing function. The specific process is as follows: The second solenoid valve is opened, the solvent inlet device is connected to the liquid outlet pipeline, and the solvent inlet device sends part of the solvent into the liquid outlet pipeline. Then the second solenoid valve is closed, the first solenoid valve is opened, the high-pressure gas inlet device is connected to the liquid outlet pipe, and the high-pressure gas flushes the solvent in the liquid outlet pipe out of the nozzle rinsing device, generating a spraying effect, so as to achieve automatic rinsing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 1 is a schematic structural view of the first embodiment of the present invention;

[0017] Figure 2 FIG. 2 is a schematic view of the first embodiment of the present invention;

[0018] Figure 3 FIG. 3 is a three - dimensional structural view of the rinsing nozzle in the first embodiment of the present invention;

[0019] Figure 4 FIG. 4 is a schematic cross - sectional view of the structure of the rinsing nozzle in the first embodiment of the present invention;

[0020] Figure 5 FIG. 5 is a three - dimensional structural view of the second embodiment of the present invention.

[0021] Reference numerals:

[0022] Gas inlet pipeline 10, liquid inlet pipeline 20, liquid outlet pipeline 30;

[0023] Nozzle rinsing device 1, rinsing nozzle 11, spraying end face 111, nozzle 112, liquid inlet hole 113;

[0024] Solvent inlet device 2, injection pump 21, container 22, electric control box 40;

[0025] High - pressure gas inlet device 3, pressure regulating valve 31, intake solenoid valve 32;

[0026] Multi - channel solenoid valve 4, first interface 41, first solenoid valve 411, second interface 42, second solenoid valve 421, third interface 43, third solenoid valve 431, fourth interface 44;

[0027] Switching valve 5, inlet channel 51, outlet channel 52;

[0028] Multi - channel transfer device 6, channel adapter 61. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1

[0031] Refer to Figure 1 and Figure 2As shown, a system for automatically rinsing the inner wall of a test tube during a concentration process includes a controller (omitted in the figure), a spray head rinsing device 1, a solvent inlet device 2, a high-pressure gas inlet device 3, and a multi-channel solenoid valve 4. The high-pressure gas inlet device 3 is connected to the first interface 41 of the multi-channel solenoid valve 4 through an air inlet pipeline 10. The solvent inlet device 2 is connected to the second interface 42 of the multi-channel solenoid valve 4 through a liquid inlet pipeline 20. The spray head rinsing device 1 is connected to the third interface 43 of the multi-channel solenoid valve 4 through a liquid outlet pipeline 30. (It should be noted that the air inlet pipeline 10, the liquid inlet pipeline 20, and the liquid outlet pipeline 30 should not be simply understood as only one pipeline. In this article, they are just general terms for the pipelines that play the roles of air inlet, liquid inlet, and liquid outlet, and can be one pipeline or multiple pipelines as needed).

[0032] The multi-channel solenoid valve 4 includes a first solenoid valve 411 and a second solenoid valve 421. The first solenoid valve 411 controls the opening and closing of the first interface 41, and the second solenoid valve 421 controls the opening and closing of the second interface 42. The controller is used to control the operation of the first solenoid valve 411 and the second solenoid valve 421.

[0033] The multi-channel solenoid valve 4 is used to control the connection between the spray head rinsing device 1, the solvent inlet device 2, and the high-pressure gas inlet device 3, so as to realize the rinsing function. The specific implementation process is as follows: The second solenoid valve 421 is opened, and the solvent inlet device 2 is connected to the liquid outlet pipeline 30. The solvent inlet device 2 sends part of the solvent into the liquid outlet pipeline 30. Then the second solenoid valve 421 is closed, and the first solenoid valve 411 is opened. The high-pressure gas inlet device 3 is connected to the liquid outlet pipeline 30, and the introduced high-pressure gas flushes the solvent in the liquid outlet pipeline 30 out of the spray head rinsing device 1 and sprays it into the test tube to be rinsed, thus realizing rinsing. Pushing the solvent out by high-pressure gas will not cause subsequent dripping of the rinsing spray head 11, resulting in the dripping of the solvent during the subsequent nitrogen blowing concentration process, leading to inaccurate sample concentration and reducing the instability factors during the concentration process.

[0034] When the same concentrator has the function of concentrating multiple samples simultaneously, then the spray head rinsing device 1 correspondingly includes several rinsing spray heads 11. Through the adjustment of the multi-channel solenoid valve 4, only one of the test tubes for samples (not shown in the figure, placed under the rinsing spray head 11 during use) can be rinsed each time. Therefore, it is necessary to allocate the rinsing. For this reason, a switching valve 5 is also connected between the spray head rinsing device 1 and the third interface 43.

[0035] The switching valve 5 has an inlet passage 51 and a plurality of outlet passages 52. The inlet passage 51 is communicated with the third interface 43 through a liquid outlet pipeline 30. The flushing nozzle 11 is communicated with the corresponding outlet passage 52 through a liquid inlet pipeline 20. In this embodiment, preferably, there are 12 flushing nozzles 11, and the switching valve 5 with 12 outlet passages 52 is correspondingly selected. The switching valve 5 is a prior art, and its function is to arbitrarily control the communication between the outlet passage 52 and one of the outlet passages 51. The working process is as follows: The controller pre-sets the program. When it is necessary to flush one of the flushing nozzles 11, the controller controls the switching valve 5 to communicate the inlet passage 51 with the corresponding outlet passage 52, and then the controller controls the above-mentioned liquid inlet and gas inlet processes.

[0036] In this embodiment, generally, the nozzle flushing device 1 and the switching valve 5 are far apart, and the diameters of the liquid outlet pipelines 30 connecting the nozzle flushing device 1 and the switching valve 5 are different. Therefore, it is difficult to directly connect the nozzle flushing device 1 and the switching valve 5 through 1 liquid outlet pipeline 30. For this reason, a multi-channel transfer device 6 is also connected between the nozzle flushing device 1 and the switching valve 5. The multi-channel transfer device 6 has a plurality of channel transfer interfaces 61. After a plurality of flushing nozzles 11 are communicated with the corresponding channel transfer interfaces 61 through the liquid inlet pipelines 20 one by one, the corresponding channel transfer interfaces 61 are then communicated with the corresponding outlet passages 52 through another liquid outlet pipeline 20.

[0037] In many cases, the pressure of the high-pressure gas entering the high-pressure gas inlet device 3 may be too high (especially when high-pressure gas is centrally supplied in industrial areas or parks), and the pressure is unstable. Therefore, the high-pressure gas inlet device 3 includes a pressure regulating valve 31 and an intake solenoid valve 32. The pressure regulating valve 31 and the intake solenoid valve 32 are installed on the intake pipeline 10 in sequence according to the intake direction. The controller is used to control the operation of the intake solenoid valve 32. The intake process is as follows: The first solenoid valve 411 of the multi-channel solenoid valve 4 is opened, and the first interface 41 and the third interface 43 are communicated. Then the intake solenoid valve 32 is opened to let in high-pressure gas. After the high-pressure gas passes through the pressure regulating valve 31, the gas pressure meets the set pressure. The high-pressure gas with stable pressure can then push the solvent out of the flushing nozzle 11.

[0038] The function of the solvent liquid inlet device 2 is to provide the solvent. There are many devices that can realize liquid supply. In this embodiment, preferably, the solvent liquid inlet device 2 includes an injection pump 21 and a container 22. The container 22 is used to store the solvent. The injection pump 21 has the function of extracting and injecting the solvent. The container 22 is communicated with the second interface 42 through a liquid inlet pipeline 20. The multi-channel solenoid valve 4 also has a fourth interface 44 and a third solenoid valve 431. For reference, Figure 2As shown, the injection pump 21 is connected to the fourth interface 44 through a liquid inlet pipeline 20. The fourth interface 44 is connected to the first interface 41, the second interface 42, and the third interface 43. That is, both the injection pump 21 and the container 22 are in a connected state with the second interface 42. The third solenoid valve 431 is used to control the opening and closing of the third interface 43, and the controller is used to control the operation of the injection pump 21 and the third solenoid valve 431.

[0039] After adopting the above solution, the entire rinsing process of the present invention is as follows:

[0040] Step 1: Select the rinsing nozzle 11. The specific process is that the controller controls the inlet channel 51 of the switching valve 5 to communicate with the outlet channel 52 corresponding to the rinsing nozzle 11 to be rinsed.

[0041] Step 2: The controller controls the second solenoid valve 421 to open, and the first solenoid valve 411 and the third solenoid valve 431 to close. At this time, the container 22 and the injection pump 21 are connected. The controller controls the injection pump 21 to extract the solvent, and then controls the second solenoid valve 421 to close. At this time, the second interface 42 is closed. Control the third solenoid valve 431 to open, the third interface 43 to open, then control the injection pump 21 to extrude the solvent and push it into the liquid outlet pipeline 30, and finally control the injection pump 21 to stop working. At this time, the injection pump 21 remains in the position at the end of the liquid pushing.

[0042] Step 3: The controller controls the first solenoid valve 411 to open, the first interface 41 and the third interface 43 to communicate, and then opens the intake solenoid valve 32 to introduce high-pressure gas. After the high-pressure gas passes through the pressure regulating valve 31, the gas pressure meets the set pressure. The high-pressure gas that meets the pressure can spray the solvent in the liquid outlet pipeline 30 from the rinsing nozzle 11.

[0043] Preferably, the injection pump 21 is a metering pump to ensure that the volume of the solvent pushed into the liquid outlet pipeline 30 meets the set volume.

[0044] Refer to Figure 3 and Figure 4 As shown, in order to increase the solvent spraying effect of the rinsing nozzle 11. The rinsing nozzle 11 with the following structure is preferably used. The rinsing nozzle 11 has a spraying end face 111, and the spraying end face 111 is in the shape of a cone or a frustum of a cone with a gradually decreasing diameter. A plurality of spray holes 112 are evenly distributed on the spraying end face 111, and the spray holes 112 are arranged outward. Arranging the spray holes 112 outward can directly spray the solvent onto the test tube wall. By evenly distributing a plurality of spray holes 112 on the spraying end face 111, the sprayed solvent is uniform all around, improving the spraying effect.

[0045] In addition, the rinsing nozzle 11 is cylindrical, and the spraying end face 111 is formed by removing part of the material from one end face of the cylinder. The orientation of the spray orifice 112 is perpendicular to the spraying end face. An inlet hole 113 is formed at one end of the rinsing nozzle 11 different from the spraying end face 111. The inlet hole 113 is opened along the central axis of the rinsing nozzle 11, and a plurality of the spray orifices 112 are all communicated with the inlet hole 113. The rinsing nozzle 11 with such a structure is easy to process. In addition, each of the spray orifices 112 is communicated with the inlet hole 113, and the inlet hole 113 is opened along the central axis of the rinsing nozzle 11. Therefore, the distances from each of the spray orifices 112 to the inlet hole 113 are the same. Thus, when the solvent is sprayed, each of the spray orifices 112 sprays out together, improving the spraying effect.

[0046] Embodiment 2

[0047] Please refer to Figure 5 , which is a schematic diagram of Embodiment 2 of the system for automatically rinsing the inner wall of a test tube during the concentration process according to the present invention. The difference from Embodiment 1 is that it further includes an electric control box 40, and the controller, the solvent inlet device 2, the high-pressure gas inlet device 3, and the multi-channel solenoid valve 4 are installed in the electric control box 40.

[0048] Since there are many pipeline connections and the installation and maintenance are relatively troublesome, the following solution is adopted. At least some of the pipeline connection interfaces of the solvent inlet device 2, the high-pressure gas inlet device 3, and the multi-channel solenoid valve 4 are located on the side of the electric control box 40. By placing the pipeline connection structure on the side of the electric control box as much as possible, the installation and inspection are facilitated.

[0049] The structural features among the above embodiments can be combined with each other to obtain other embodiments without conflict. The new embodiments obtained also do not depart from the creative spirit of the present invention and should also fall within the scope of protection of the present invention.

[0050] Unless otherwise clearly specified and limited in the text, terms such as "center", "lateral", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It should be understood that this is for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0051] In addition, if terms such as "first" and "second" exist in the text, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. If there is "a plurality of", its meaning is two or more, unless otherwise clearly and specifically limited in the text.

[0052] Unless otherwise clearly defined and limited in the text, terms such as "installation", "connection", "linkage", "fixation", etc. in the text shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Unless otherwise clearly defined and limited in the text, the description that the first feature is "on" or "under" the second feature in the text can be understood as that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature.

[0054] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A system for automatically rinsing the inner wall of a test tube during a concentration process, characterized in that: it includes a controller, a spray head rinsing device, a solvent inlet device, a high-pressure gas inlet device and a multi-channel solenoid valve. The high-pressure gas inlet device is connected to the first interface of the multi-channel solenoid valve through an air inlet pipeline. The solvent inlet device is connected to the second interface of the multi-channel solenoid valve through a liquid inlet pipeline. The spray head rinsing device is connected to the third interface of the multi-channel solenoid valve through a liquid outlet pipeline. The first interface is controlled to open and close by a first solenoid valve inside the multi-channel solenoid valve. The second interface is controlled to open and close by a second solenoid valve inside the multi-channel solenoid valve. The controller is used to control the operation of the first solenoid valve and the second solenoid valve; the spray head rinsing device includes a plurality of rinsing spray heads. A switching valve is also connected between the spray head rinsing device and the third interface. The switching valve has an inlet channel and a plurality of outlet channels. The controller is connected to the switching valve to control the connection between the inlet channel and any one of the outlet channels. The inlet channel is communicated with the third interface through a liquid outlet pipeline. The plurality of rinsing spray heads are communicated with the corresponding outlet channels through a plurality of liquid inlet pipelines; a multi-channel transfer device is also connected between the spray head rinsing device and the switching valve. The multi-channel transfer device has a plurality of channel transfer interfaces. The plurality of rinsing spray heads are communicated with the corresponding channel transfer interfaces through liquid inlet pipelines and then communicated with the corresponding outlet channels; the high-pressure gas inlet device includes a pressure regulating valve and an inlet solenoid valve. The pressure regulating valve and the inlet solenoid valve are sequentially installed on the air inlet pipeline according to the air inlet direction. The controller is used to control the operation of the inlet solenoid valve; the solvent inlet device includes an injection pump with extraction and injection functions and a container for storing the solvent. The container is communicated with the second interface through a liquid inlet pipeline. The multi-channel solenoid valve also has a fourth interface and a third solenoid valve. The injection pump is communicated with the fourth interface through a liquid inlet pipeline. The fourth interface is communicated with the first interface, the second interface and the third interface. The third solenoid valve is used to control the opening and closing of the third interface. The controller is used to control the operation of the injection pump and the third solenoid valve; the injection pump is a metering injection pump.

2. A system for automatically rinsing the inner wall of a test tube during a concentration process according to claim 1, characterized in that: the spray head rinsing device includes a rinsing spray head. The rinsing spray head has a spraying end face. The spraying end face is a conical or frustum-shaped surface with a gradually decreasing diameter. A plurality of spray holes are evenly distributed on the spraying end face, and the spray holes are arranged outward; 3. A system for automatically rinsing the inner wall of a test tube during a concentration process according to claim 2, characterized in that: the rinsing spray head is cylindrical. The spraying end face is formed by removing part of the material from one end face of the cylinder. The orientation of the spray holes is perpendicular to the spraying end face. An inlet hole is formed in the center of the rinsing spray head. A plurality of the spray holes are communicated with the inlet hole; 4. A system for automatically rinsing the inner wall of a test tube during a concentration process according to claim 1, characterized in that: It includes an electric control box, and the controller, the solvent inlet device, the high-pressure gas inlet device and the multi-channel solenoid valve are installed in the electric control box, and at least some of the pipeline connection interfaces of the solvent inlet device, the high-pressure gas inlet device and the multi-channel solenoid valve are located on the side of the electric control box.

Images