A high-cleanliness closed liquid sampling device

Abstract

The utility model provides a kind of high cleanliness closed liquid sampling device: including equipment main body, the inner setting of equipment main body has working cavity, the side of equipment main body is provided with buffer door structure, air purification device is installed with working cavity on the upper part of equipment main body, the air purification device includes primary filter, medium efficiency filter, high efficiency filter sequentially communicated from top to bottom, air induction fan is arranged between medium efficiency filter and high efficiency filter, and the input of high efficiency filter is communicated with working cavity.The utility model design is reasonable, provides a closed environment by working cavity, then through three-stage filtering air purification device constantly dilutes replacement in working cavity, so that reach clean environment requirement, reduce the possibility of experimental error caused by particle in air, facilitate specialized sampling operation.

Description

Technical Field

[0001] This utility model relates to a high-purity, closed-loop liquid sampling device. Background Technology

[0002] The conventional sampling method is to manually pipette samples in a clean laboratory environment using a combination of droppers, test tubes, or sample vials. Although the laboratory environment is clean, the air in the laboratory still contains a large number of tiny particles due to human activity, which can affect the experimental results after sampling. Utility Model Content

[0003] In view of this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a high-cleanliness closed liquid sampling device. The device is reasonably designed and provides a closed environment through the working chamber. Then, the air purification device with three-stage filtration continuously dilutes and replaces the air in the working chamber, so as to achieve the clean environment requirements, reduce the possibility of experimental errors caused by air particles, and facilitate professional sampling operations.

[0004] This utility model is achieved by the following scheme: a high-cleanliness closed liquid sampling device: including a device body, a working chamber is provided inside the device body, a buffer door structure is provided on one side of the device body, and an air purification device communicating with the working chamber is installed on the upper part of the device body.

[0005] Furthermore, the air purification device includes a pre-filter, a medium-efficiency filter, and a high-efficiency filter connected sequentially from top to bottom. An exhaust fan is provided between the medium-efficiency filter and the high-efficiency filter, and the inlet of the high-efficiency filter is connected to the working chamber.

[0006] Furthermore, the pre-filter, medium-efficiency filter, and high-efficiency filter are all box-shaped structures with openings at the top and bottom for air passage. The pre-filter is filled with a combination of non-woven fabric and aluminum wire mesh filter media, the medium-efficiency filter is filled with non-woven fabric filter media, and the high-efficiency filter is filled with glass fiber filter media.

[0007] Furthermore, the working chamber is divided into an upper sampling operation chamber and a lower liquid collection chamber by a horizontal partition. The upper sampling operation chamber is divided into an air purification chamber and a buffer chamber by a vertical longitudinal partition. The air purification chamber is divided into a sampling chamber and an exhaust chamber by a vertical transverse partition.

[0008] Furthermore, the horizontal partition has a plurality of holes arranged in an array on the area corresponding to the air purification chamber, which connect the air purification chamber and the lower liquid collection chamber.

[0009] Furthermore, the exhaust chamber is provided with an exhaust hole, which is connected to an external air extraction mechanism via a pipeline. The sampling chamber is provided with an air inlet, and the input port of the high-efficiency filter is connected to the air inlet.

[0010] Furthermore, a waste liquid collection port is provided at the bottom of the lower liquid collection chamber, and the waste liquid collection port is connected to a waste liquid collection tank via a pipeline with a switch valve.

[0011] Furthermore, the main body of the device is provided with an external inlet and outlet connecting to the buffer cavity on its side, and an internal inlet and outlet connecting to the sampling cavity is provided on the inner wall of the buffer cavity. The buffer door structure includes an inner buffer door and an outer buffer door, with the outer buffer door hinged to the external inlet and outlet and the inner buffer door hinged to the internal inlet and outlet.

[0012] Furthermore, a sampling pipeline system is provided on the upper part of the main body of the equipment. The sampling pipeline system includes several sampling pipelines with control valves. The output end of the sampling pipelines passes through the upper part of the main body of the equipment and enters the sampling chamber. The sampling pipeline system also includes a flushing pipeline with a control valve. The output end of the flushing pipeline passes through the upper part of the main body of the equipment and enters the sampling chamber and is close to the inner buffer door.

[0013] Furthermore, the sampling chamber has symmetrically arranged operation ports on the left and right sides away from the exhaust chamber, and operation gloves are fitted on the operation ports. An observation window is provided on the upper part of the sampling chamber on the side away from the exhaust chamber.

[0014] Compared with the prior art, the present invention has the following advantages: it is reasonably designed, provides a sealed environment through the working chamber, and then continuously dilutes and replaces the air in the working chamber through a three-stage filtration air purification device, so as to achieve the requirements of a clean environment, reduce the possibility of experimental errors caused by airborne particles, and facilitate professional sampling operations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side view of the structure of this utility model; Figure 3 This is a schematic diagram of the air purification device of this utility model; Figure 4 This is a schematic diagram of the main structure of the device of this utility model.

[0016] In the diagram: 1-Main body of the equipment; 2-Working chamber; 3-Buffer door structure; 4-Air purification device; 5-Primary filter; 6-Medium-efficiency filter; 7-High-efficiency filter; 8-Exhaust fan; 9-Horizontal partition; 10-Lower liquid collection chamber; 11-Vertical partition; 12-Buffer chamber; 13-Vertical and transverse partition; 14-Sampling chamber; 15-Exhaust chamber; 16-Orifice; 17-Extraction mechanism; 18-Waste liquid collection tank; 19-Inner buffer door; 20-Outer buffer door; 21-Control valve; 22-Sampling pipeline; 23-Flushing pipeline; 24-Operating port. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, 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 pertains.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] like Figure 1-4 As shown, a high-cleanliness closed liquid sampling device includes a main body 1, a working chamber 2 inside the main body, a buffer door structure 3 on one side of the main body, and an air purification device 4 connected to the working chamber installed on the upper part of the main body.

[0021] In this embodiment, to achieve the introduction of filtered air and the continuous dilution and replacement of the air in the working chamber, the air purification device includes a pre-filter 5, a medium-efficiency filter 6, and a high-efficiency filter 7 connected sequentially from top to bottom. An exhaust fan 8 is provided between the medium-efficiency filter and the high-efficiency filter. The inlet of the high-efficiency filter is connected to the working chamber. The exhaust fan is an FFU exhaust fan. More specifically, the pre-filter, medium-efficiency filter, and high-efficiency filter are all box structures. The box structure has openings at the top and bottom for air to pass through. A grid plate or filter screen can be installed in the opening to prevent the filter material from falling out. The pre-filter is filled with a combination of non-woven fabric and aluminum wire mesh filter material. The medium-efficiency filter is filled with non-woven fabric filter material. The high-efficiency filter is filled with glass fiber filter material. More specifically, the pre-filter is a Nokel GP pre-filter, the medium-efficiency filter is a Nokel FB medium-efficiency filter, and the high-efficiency filter is a Nokel FB medium-efficiency filter, which filters air particles with diameters of 1μm, 0.5μm, and 0.3μm, respectively.

[0022] In this embodiment, in order to achieve gas path connectivity within the sampling operation chamber and collection of sampling waste liquid, the working chamber is divided into an upper sampling operation chamber and a lower collection chamber 10 by a horizontal partition 9. The upper sampling operation chamber is divided into an air purification chamber and a buffer chamber 12 by a vertical longitudinal partition 11. The air purification chamber is divided into a sampling chamber 14 and an exhaust chamber 15 by a vertical transverse partition 13. Several holes 16 connecting the air purification chamber and the lower collection chamber are arrayed on the area of ​​the horizontal partition corresponding to the air purification chamber. The input port of the high-efficiency filter is connected to the air inlet.

[0023] In this embodiment, in order to discharge the exhaust gas, an exhaust hole is provided on the exhaust chamber. The exhaust hole is connected to an external suction mechanism 17 via a pipeline. The suction mechanism can be an existing suction machine. The sampling chamber is provided with an air inlet.

[0024] In this embodiment, in order to achieve centralized recycling of waste liquid, a waste liquid collection port is provided at the bottom of the lower collection chamber, and the waste liquid collection port is connected to a waste liquid collection tank 18 via a pipeline with a switch valve.

[0025] In this embodiment, in order to reduce the direct entry of polluted air from the outside into the sampling chamber, an external inlet and outlet connected to the buffer chamber are provided on the side of the main body of the device. An internal inlet and outlet connected to the sampling chamber are provided on the inner wall of the buffer chamber. The buffer door structure includes an inner buffer door 19 and an outer buffer door 20. The outer buffer door is hinged to the external inlet and outlet, and the inner buffer door is hinged to the inner inlet and outlet. In actual operation, the buffer door generally has poor airtightness and will allow air to pass through to the outside. Through the positive pressure of the clean air in the sampling chamber, air passes through to the outside, thereby purifying the buffer chamber.

[0026] In this embodiment, in order to realize the sampling operation, a sampling pipeline system is provided on the upper part of the main body of the device. The sampling pipeline system includes several sampling pipelines 22 with control valves 21. The output end of the sampling pipelines passes through the upper part of the main body of the device and enters the sampling chamber. The sampling pipeline system also includes a flushing pipeline 23 with a control valve. The output end of the flushing pipeline passes through the upper part of the main body of the device and enters the sampling chamber and is close to the inner buffer door. The flushing pipeline is used to transport UPW ultrapure water. The sampling chamber has symmetrical operation ports 24 on the left and right sides away from the exhaust port. The operation ports are covered with operation gloves made of acid and alkali resistant material. The sampling chamber has an observation window on the upper part of the side away from the exhaust port.

[0027] In this embodiment, the method of use is as follows: turn on the FFU exhaust fan to introduce air from the atmospheric environment into the sampling chamber. During this process, the air from the atmospheric environment needs to pass through three layers of filtration: a pre-filter, a medium-efficiency filter, and a high-efficiency filter, which filter particles with diameters of 1μm, 0.5μm, and 0.3μm, respectively. After passing through three layers of filtration, the clean gas reaches the sampling chamber and mixes with the original unfiltered gas in the operating area, resulting in an increase in the air pressure in the sampling chamber. Through the action of the external air extraction mechanism, the mixed gas in the sampling chamber will be extracted, but the overall air pressure is maintained at a slightly positive pressure of 20-40pa to ensure that unclean gas in the atmosphere does not enter the sampling chamber. Under the continuous air intake and exhaust action of the FFU exhaust fan and the air extraction mechanism, the mixed gas in the sampling chamber will be continuously diluted and replaced until the clean environment requirements are met (the best effect can reach Class 100, 0.3μm < 300pcs / ft3), and the sampling conditions are met.

[0028] In this embodiment, the sampling operation is performed as follows: After the sampling chamber meets the cleanliness requirements, the sampling bottle enters the sampling chamber through the sampling bottle inlet / outlet buffer door structure. By controlling the valve, UPW ultrapure water is used to rinse the sampling bottle body in the area near the inner door of the buffer door, reducing the impact of foreign objects on the bottle body on the sampling effect. After rinsing, the sampler performs the sampling operation through the acid and alkali resistant operating port to ensure that the sampler and the material are sampled without contact (full bottle rinsing, half bottle shaking and cleaning, sampling, cap rinsing, bottle body rinsing, etc.). After sampling, the sample is taken out through the sampling bottle inlet / outlet buffer door structure, and the rinsing and cleaning waste liquid is collected centrally through the lower collection chamber and discharged to the waste liquid collection tank through the drain pipe.

[0029] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0030] If the terms "first" or "second" are used in this document to specify components, those skilled in the art should know that the use of "first" or "second" is merely for the purpose of distinguishing components in description, and unless otherwise stated, the above terms have no special meaning.

[0031] If this utility model discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, a fixed connection can be understood as: a detachable fixed connection (e.g., using bolts or screws), or a non-detachable fixed connection (e.g., riveting, welding). Of course, mutually fixed connections can also be replaced by an integral structure (e.g., manufactured by integral molding using a casting process) (except where it is obviously impossible to use an integral molding process).

[0032] Furthermore, the orientations or positional relationships indicated by terms such as "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in any of the technical solutions disclosed in this utility model are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this patent. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent. In addition, unless otherwise stated, the terms used to indicate shape in any of the technical solutions disclosed in this utility model include shapes that are similar to, close to, or approximate with it.

[0033] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A high-purity, closed-loop liquid sampling device, characterized in that: The device includes a main body, a working chamber inside the main body, a buffer door structure on one side of the main body, and an air purification device connected to the working chamber installed on the upper part of the main body.

2. The high-purity closed-loop liquid sampling device according to claim 1, characterized in that: The air purification device includes a pre-filter, a medium-efficiency filter, and a high-efficiency filter connected in sequence from top to bottom. An exhaust fan is provided between the medium-efficiency filter and the high-efficiency filter, and the inlet of the high-efficiency filter is connected to the working chamber.

3. The high-purity closed-loop liquid sampling device according to claim 2, characterized in that: The pre-filter, medium-efficiency filter, and high-efficiency filter are all box-shaped structures with openings at the top and bottom for air to pass through. The pre-filter is filled with a combination of non-woven fabric and aluminum wire mesh filter media, the medium-efficiency filter is filled with non-woven fabric filter media, and the high-efficiency filter is filled with glass fiber filter media.

4. The high-purity closed-loop liquid sampling device according to claim 2, characterized in that: The working chamber is divided into an upper sampling operation chamber and a lower liquid collection chamber by a horizontal partition. The upper sampling operation chamber is divided into an air purification chamber and a buffer chamber by a vertical longitudinal partition. The air purification chamber is divided into a sampling chamber and an exhaust chamber by a vertical transverse partition.

5. The high-purity closed-loop liquid sampling device according to claim 4, characterized in that: The horizontal partition has several holes arranged in an array on the area corresponding to the air purification chamber, connecting the air purification chamber and the lower liquid collection chamber.

6. The high-purity closed-loop liquid sampling device according to claim 4, characterized in that: The exhaust chamber is provided with an exhaust hole, which is connected to an external air extraction mechanism via a pipeline. The sampling chamber is provided with an air inlet, and the input port of the high-efficiency filter is connected to the air inlet.

7. The high-purity closed-loop liquid sampling device according to claim 4, characterized in that: A waste liquid collection port is provided at the bottom of the lower liquid collection chamber, and the waste liquid collection port is connected to a waste liquid collection tank via a pipeline with a switch valve.

8. The high-purity closed-loop liquid sampling device according to claim 4, characterized in that: The main body of the device is provided with an external inlet and outlet for connecting to the buffer chamber on its side. An internal inlet and outlet for connecting to the sampling chamber is provided on the inner wall of the buffer chamber. The buffer door structure includes an inner buffer door and an outer buffer door. The outer buffer door is hinged to the external inlet and outlet, and the inner buffer door is hinged to the internal inlet and outlet.

9. The high-purity closed-loop liquid sampling device according to claim 8, characterized in that: The upper part of the main body of the equipment is provided with a sampling pipeline system, which includes several sampling pipelines with control valves. The output end of the sampling pipelines passes through the upper part of the main body of the equipment and enters the sampling chamber. The sampling pipeline system also includes a flushing pipeline with a control valve. The output end of the flushing pipeline passes through the upper part of the main body of the equipment and enters the sampling chamber and is close to the inner buffer door.

10. The high-purity closed-loop liquid sampling device according to claim 4, characterized in that: The sampling chamber has symmetrical operating ports on the left and right sides away from the exhaust chamber. Operating gloves are fitted over the operating ports. An observation window is provided on the upper part of the sampling chamber on the side away from the exhaust chamber.

Images