Solid-phase extraction device capable of automatically extracting liquid

Abstract

The utility model discloses a solid-phase extraction device capable of automatically extracting liquid, and relates to the technical field of extraction devices, the solid-phase extraction device comprises a shell, a cover body, a collection box and a control assembly; the cover body is buckled on the shell, the collecting box is installed in the shell, and the control assembly is used for controlling waste liquid in the collecting box to be discharged; the outer side of the shell communicates with an air pump through a pipeline, and the air pump is used for sealing the shell and the cover body; wherein the control assembly comprises a check valve, branch pipes, a partition plate and a connecting piece, the partition plate is installed in the collecting box, a containing cavity is formed by the partition plate and the collecting box, the branch pipes are arranged in the containing cavity in parallel, the connecting piece is communicated with the branch pipes, and the check valve is communicated with the connecting piece penetrating out of the shell. The device has the effects that waste liquid is automatically taken out and collected, and time and labor are saved.

Description

Technical Field

[0001] The present application relates to the technical field of extraction devices, and in particular, to a solid-phase extraction device for automatically extracting liquid. Background Art

[0002] With the improvement of technology and people's living standards, the detection of water and soil in the environment has become more and more strict. In the inspection and analysis of the content of organic pollutants in soil, a solid-phase extraction device is indispensable in the pretreatment of liquid chromatography testing methods.

[0003] A solid-phase extraction device is to use a solid adsorbent to adsorb the target compound in a liquid sample, separate it from the matrix and interfering compounds of the sample, and then elute it with an eluent or thermally desorb it to achieve the purpose of separating and enriching the target compound. As a sample pretreatment technology, solid-phase extraction has been more and more widely used in environmental organic matter detection laboratories.

[0004] After the waste liquid is generated in the existing solid-phase extraction device, it is necessary to open the top cover, manually take out the waste liquid tank and discard the waste liquid, which is time-consuming and laborious. Summary of the Utility Model

[0005] In order to improve the problem that the waste liquid tank needs to be manually taken out and discarded from the shell, which is time-consuming and laborious, the present application provides a solid-phase extraction device for automatically extracting liquid.

[0006] A solid-phase extraction device for automatically extracting liquid provided by the present application adopts the following technical solutions:

[0007] A solid-phase extraction device for automatically extracting liquid includes a shell, a cover, a collection box and a control component; the cover is buckled on the shell, the collection box is installed in the shell, and the control component is used to control the discharge of the waste liquid in the collection box; an air pump is connected to the outside of the shell through a pipeline for sealing the shell and the cover; wherein, the control component includes a check valve, a branch pipe, a partition plate and a connector, the partition plate is installed in the collection box, a cavity is formed between the partition plate and the collection box, the branch pipes are arranged in parallel in the cavity, the connector is communicated with a plurality of branch pipes, and the check valve is communicated with the connector passing through the shell.

[0008] By adopting the above technical solutions, the collection box is placed in the shell, the collection box is used to collect the waste liquid collected after flushing the device on the top of the cover, the air pump evacuates the inside of the shell, the gas pressure inside the shell is less than the atmospheric pressure, the check valve is closed, and the waste liquid is stored in the collection box; when the air pump finishes evacuating the inside of the shell and the gas pressure inside the shell is equal to the atmospheric pressure, the check valve is opened by the water pressure of the waste liquid, the waste liquid flows from the partition plate into the branch pipes, and finally converges on the connector, realizing automatic outflow and collection from the collection box.

[0009] Optionally, a vacuum gauge is detachably installed on the pipeline connecting the air pump and the housing, and a pressure relief valve is also installed on one side of the vacuum gauge.

[0010] By adopting the above technical solution, the vacuum gauge is used to measure the vacuum pressure of the gas inside the housing by the air pump, and the pressure relief valve is used to adjust the pressure in the system to prevent the pressure from exceeding the preset value and avoid damage to the pipeline caused by the internal high pressure of the air pump during inflation.

[0011] Optionally, a shelving assembly for placing test tubes is also installed inside the housing. The shelving assembly includes a placement plate and a support column. The placement plate and the collection box are arranged at a certain height. The support column is slidably arranged on the placement plate, and the support column and the collection box are in plug-in fit.

[0012] By adopting the above technical solution, test tubes are placed on the placement plate for collecting the dripping substances of solid-phase extraction. Using the collection box as a base to achieve the positioning function at the bottom. The collection box is provided with a guiding hole along the top that is smaller than the height of the support column, and the support column and the guiding hole are in snap-fit.

[0013] Optionally, a plurality of clamping grooves are formed on the support column, and a limiting ring is clamped in the clamping grooves.

[0014] By adopting the above technical solution, the limiting ring limits the two end faces of the placement plate on the support column. The plurality of clamping grooves on the support column facilitate the adjustment of the position of the placement plate on the support column, suitable for test tubes of different heights to be placed on the placement plate.

[0015] Optionally, a plurality of through holes are formed on the placement plate, and a rubber ring is installed in each through hole.

[0016] By adopting the above technical solution, the rubber ring in the through hole is used to protect the tube wall of the test tube placed in the through hole.

[0017] Optionally, the connecting piece includes a first pipe, a second pipe and a sealing ring. The first pipe is communicated with the branch pipe. One end of the first pipe far away from the branch pipe is in threaded fit with the second pipe. The check valve is connected with the second pipe, and the sealing ring is installed on the connecting end of the check valve and the second pipe.

[0018] By adopting the above technical solution, the first pipe and the second pipe are tightened by threading, which is convenient for loading and unloading. The sealing effect between the second pipe and the check valve is improved by the sealing ring.

[0019] Optionally, the partition plate inside the collection box is arranged in a V shape. An output port is formed on the concave part between the partition plates, and the branch pipe is installed on the output port.

[0020] By adopting the above technical solution, the V-shaped partition plate helps to make all the waste liquid flow into the output port along the concave part, and then flow through the branch pipe and be discharged along the output port.

[0021] Optionally, the volume of the collection box is smaller than that of the housing, and a gap is formed between the outer peripheral four walls of the collection box and the inner wall of the housing.

[0022] By adopting the above technical solution, a gap is left between the collection box and the housing, which facilitates the connection of the pipeline in the collection box and the pipeline at one end of the check valve.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The waste liquid generated by solid-phase extraction flows through the branch pipe along the partition plate in the collection box, flows into the check valve through the connector, and the air pump controls the air pressure inside the housing. The water pressure of the waste liquid opens the check valve, and the waste liquid automatically flows out of the collection box and is collected.

[0025] 2. The connector can be conveniently loaded and unloaded, avoiding manually removing the waste liquid from the housing and discarding it, realizing automatic collection of the waste liquid, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic diagram showing the overall structure of the present application.

[0028] Figure 2 It is a front cross-sectional view showing the present application.

[0029] Figure 3 It is a side cross-sectional view showing the present application.

[0030] Figure 4 It is a magnified view in the direction A of the present application showing Figure 3 of.

[0031] Figure 5 It is a schematic diagram showing the structure of the shelving component of the present application.

[0032] Reference numerals: 1, housing; 2, cover body; 3, collection box; 4, control component; 5, air pump; 41, check valve; 42, branch pipe; 43, partition plate; 44, connector; 6, vacuum gauge; 7, pressure relief valve; 8, shelving component; 81, placement plate; 82, support pillar; 83, clamping groove; 84, limiting ring; 85, through hole; 86, rubber ring; 441, first pipeline; 442, second pipeline; 443, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following further elaborates on this application in conjunction with the appended Figures 1-5 drawings for a more detailed description.

[0034] An embodiment of this application discloses a solid-phase extraction device for automated liquid extraction.

[0035] Referring to Figure 1 and Figure 2 as shown, it consists of a housing 1, a cover 2, a collection box 3, and a control component 4; the cover 2 is snapped onto the housing 1, the collection box 3 is installed inside the housing 1, and the control component 4 is used to control the discharge of the waste liquid in the collection box 3; before the solid-phase extraction device is cleaned, the cover 2 and the housing 1 need to be sealed. The outside of the housing 1 is connected to an air pump 5 through a pipeline for sealing the housing 1 and the cover 2; among them, the control component 4 includes a check valve 41, a branch pipe 42, a partition 43, and a connector 44. The partition 43 is installed inside the collection box 3, and a cavity is formed between the partition 43 and the collection box 3. The branch pipes 42 are arranged in parallel in the cavity. The connector 44 communicates with multiple branch pipes 42, the check valve 41 communicates with the connector 44 that penetrates through the housing 1. After the waste liquid is subjected to solid-phase extraction, it drips onto the partition 43, and the waste liquid flows into the input end of the branch pipe 42 along the partition 43, is discharged into the connector 44 along the output end of the branch pipe 42, and finally automatically flows out through the check valve 41 for collection.

[0036] Referring to Figure 1 as shown, a vacuum gauge 6 is detachably installed on the pipeline connecting the air pump 5 and the housing 1. The installed vacuum gauge 6 detects the vacuum pressure of the gas inside the housing 1. A pressure relief valve 7 is also installed on the pipeline connecting the side of the vacuum gauge 6 to the air pump 5. The pressure relief valve 7 is used to adjust the pressure of the overall system to prevent the air pressure from exceeding the preset value and avoid damage to the internal pipeline by the air pump 5 under high pressure.

[0037] Referring to Figure 4 as shown, the connector 44 consists of a first pipe 441, a second pipe 442, and a sealing ring 443. The first pipe 441 communicates with the branch pipe 42. One end of the first pipe 441 away from the branch pipe 42 is in threaded fit with the second pipe 442. The check valve 41 is connected to the second pipe 442. The sealing ring 443 is installed at the connection end of the check valve 41 and the second pipe 442. The first pipe 441 is fixed on the branch pipe 42, and the caliber of the branch pipe 42 is equal to that of the first pipe 441. The inner diameter of the second pipe 442 is equal to the outer diameter of the first pipe 441. The second pipe 442 and the first pipe 441 are further fastened by threading. At the same time, when taking the collection box 3, the first pipe 441 and the second pipe 442 can be unscrewed for convenient disassembly. The added sealing ring 443 improves the sealing performance between the second pipe 442 and the check valve 41.

[0038] Referring to Figure 3As shown, the partition plate 43 in the collection box 3 is arranged in a V shape. An output port is formed in the recessed portion between the partition plates 43. The branch pipe 42 is installed on the output port. The V-shaped partition plate 43 enables the waste liquid to flow into the output port along the recessed portion, and then flow out through the output port and the branch pipe 42.

[0039] The volume of the collection box 3 is smaller than that of the housing 1. A gap is formed between the outer peripheral walls of the collection box 3 and the inner wall of the housing 1. The remaining gap facilitates the disassembly or installation of the first pipe 441 and the second pipe 442, and also facilitates the removal of the collection box 3 inside the housing 1.

[0040] See Figure 5 As shown, a shelving assembly 8 for placing test tubes is further installed inside the housing 1. The shelving assembly 8 is composed of a placement plate 81 and a support column 82. The placement plate 81 and the collection box 3 are arranged at a certain height. The support column 82 is slidably arranged on the placement plate 81. The support column 82 and the collection box 3 are in plug-in fit. A plurality of clamping grooves 83 are formed on the support column 82. A limiting ring 84 is clamped in the clamping grooves 83. A guiding groove for plugging and matching with the support column 82 is formed on the top end face of the collection box 3. When the support column 82 is plugged into the collection box 3, the height of the placement plate 81 on the support column 82 is limited by the limiting rings 84 on both sides thereof, so as to adjust the placement plate 81 to different heights. When the limiting ring 84 is clamped in the clamping groove 83, the support column 82 penetrating through the placement plate 81 is limited.

[0041] A plurality of through holes 85 are formed on the placement plate 81. A rubber ring 86 is installed in each through hole 85. When the test tube is placed in the through hole 85 on the placement plate 81, the tube wall of the test tube is in direct contact with the rubber ring 86, preventing the tube wall from being worn by the through hole 85 during the taking or storing of the test tube.

[0042] The implementation principle of the solid-phase extraction device for automatic liquid extraction in the embodiment of the present application is as follows: when separating the matrix and interfering compounds of the sample, the placement plate 81 in the shelving assembly 8 is placed on the top of the collection box 3, and the limiting rings 84 are clamped tightly in the clamping grooves 83 to realize the limiting of both sides of the placement plate 81, so that the test tube is placed in the through hole 85 of the placement plate 81. By relying on the cooperation between the limiting rings 84 and the clamping grooves 83 at different positions on the support column 82, the placement plate 81 is placed at different height positions.

[0043] During the air extraction process of the air pump 5, when the internal gas pressure of the device is less than the atmospheric pressure, the check valve 41 closes, and the waste liquid is stored on the partition 43 of the collection box 3. After the air extraction ends, when the internal gas pressure of the device is equal to the atmospheric pressure, the check valve 41 is opened by the water pressure of the waste liquid. The V-shaped partition 43 catches the flowing waste liquid, and its shape and structure facilitate the waste liquid to flow along the output port through the branch pipe 42. Multiple branch pipes 42 converge and flow into the first pipe 441. The waste liquid in the first pipe 441 flows through the second pipe 442 to the check valve 41 in sequence, and the waste liquid can automatically flow out and be collected from the collection box 3, saving time and effort.

[0044] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application belongs. The terms "first", "second", "third" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms "a" or "an" and the like do not denote a limitation of quantity, but mean that there is at least one. The terms "including" or "comprising" and the like mean that the elements or items appearing before "including" or "comprising" cover the elements or items listed after "including" or "comprising" and their equivalents, and do not exclude other elements or items. The terms "upper", "lower", "left", "right" and the like are only used to indicate the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0045] The above are all the preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application shall be covered within the protection scope of this application.

Claims

1. An automated liquid extraction solid-phase extraction device, characterized in that: It includes a housing (1), a cover (2), a collection box (3) and a control component (4); the cover (2) is buckled on the housing (1), the collection box (3) is installed inside the housing (1), and the control component (4) is used to control the waste liquid in the collection box (3); the outside of the housing (1) is connected to an air pump (5) through a pipeline for sealing the housing (1) and the cover (2). Among them, the control component (4) includes a check valve (41), a branch pipe (42), a partition plate (43) and a connecting piece (44). The partition plate (43) is installed inside the collection box (3). A cavity is formed between the partition plate (43) and the collection box (3). The branch pipes (42) are arranged in parallel in the cavity. The connecting piece (44) is communicated with a plurality of branch pipes (42), and the check valve (41) is communicated with the connecting piece (44) passing through the housing (1).

2. The solid-phase extraction device for automated liquid extraction according to claim 1, wherein: A vacuum gauge (6) is detachably installed on the pipeline connecting the air pump (5) and the housing (1), and a pressure relief valve (7) is also installed on one side of the vacuum gauge (6).

3. The solid-phase extraction device for automated liquid extraction according to claim 2, wherein: A placement component (8) for placing test tubes is also installed inside the housing (1). The placement component (8) includes a placement plate (81) and a support column (82). The placement plate (81) and the collection box (3) are arranged at a certain height. The support column (82) is slidably arranged on the placement plate (81), and the support column (82) is inserted and matched with the collection box (3).

4. An automated liquid extraction solid phase extraction device according to claim 3, characterized in that: A plurality of clamping grooves (83) are formed on the support column (82), and a limiting ring (84) is clamped in the clamping grooves (83).

5. An automated liquid extraction solid-phase extraction device according to claim 4, characterized in that: A plurality of through holes (85) are formed on the placement plate (81), and a rubber ring (86) is installed in each through hole (85).

6. The solid-phase extraction device for automatic liquid extraction according to claim 1, characterized in that: The connecting piece (44) includes a first pipeline (441), a second pipeline (442) and a sealing ring (443). The first pipeline (441) is communicated with the branch pipe (42). One end of the first pipeline (441) away from the branch pipe (42) is in threaded fit with the second pipeline (442). The check valve (41) is connected to the second pipeline (442), and the sealing ring (443) is installed on the connection end of the check valve (41) and the second pipeline (442).

7. An automated liquid extraction solid phase extraction device according to claim 1, characterized in that: The partition plate (43) inside the collection box (3) is arranged in a V shape. An output port is formed on the concave part between the partition plates (43), and the branch pipe (42) is installed on the output port.

8. An automated liquid extraction solid-phase extraction device according to claim 1, characterized in that: The volume of the collection box (3) is smaller than the volume of the housing (1), and a gap is formed between the peripheral four walls of the collection box (3) and the inner wall of the housing (1).

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