A solid phase extraction apparatus for sample pre-treatment

Abstract

The application belongs to the technical field of solid phase extraction, and particularly relates to a solid phase extraction device for sample pretreatment, which comprises a main body mechanism, the inner wall of the main body mechanism is symmetrically provided with a collecting mechanism, and the top of the main body mechanism is provided with a mounting mechanism. The solid phase extraction device for sample pretreatment further comprises an auxiliary mechanism, which is used for keeping waste liquid to accurately flow into the inside of the collecting mechanism during extraction. The top of the auxiliary mechanism is fixedly connected with the bottom of the mounting mechanism. Through the main body mechanism and the collecting mechanism, the waste liquid can be quickly alternately replaced when the waste liquid is collected to the full, without manually opening the box body, taking out the waste liquid barrel from the extraction column and replacing it, so that the waste liquid is prevented from being poured and raw materials are prevented from being wasted during the replacement process. The downtime of the extraction column is shortened, the extraction progress is accelerated, the inside of the box body is kept clean, and the observation of the waste liquid tank by workers is prevented from being affected by water vapor.

Description

Technical Field

[0001] This invention belongs to the field of solid phase extraction technology, specifically a solid phase extraction device for sample pretreatment. Background Technology

[0002] Solid phase extraction (SPE) is a method of enriching, separating, and purifying samples using selective adsorption and selective elution. It is widely used in many fields such as pesticide residue detection, food analysis, pharmaceuticals, and commodity inspection. In existing technologies, SPE devices mainly include positive pressure and negative pressure types, namely, using a vacuum pump to create a vacuum and using a piston to pressurize the air. Vacuum SPE devices can process solid phase extraction columns in batches.

[0003] However, it still has the following drawbacks in actual use: when performing solid phase extraction, it is necessary to open the cover plate containing the extraction column twice to take out and put in the collection tube in order to collect waste liquid and eluent, and the whole operation process is relatively cumbersome. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the technical solution adopted by this invention is: a solid-phase extraction device for sample pretreatment, comprising: a main body, wherein a collection mechanism is symmetrically arranged on the inner wall of the main body, and an installation mechanism is arranged on the top of the main body; The solid-phase extraction apparatus for sample pretreatment also includes: An auxiliary mechanism is provided to ensure that waste liquid flows accurately into the collection mechanism during extraction, and the top of the auxiliary mechanism is fixedly connected to the bottom of the mounting mechanism. The auxiliary mechanism includes a second telescopic rod, the top of which is fixedly connected to the bottom of the installation mechanism. A fan-shaped plate is fixedly connected to the bottom of the second telescopic rod. The surface of the fan-shaped plate is evenly provided with round holes, and the top of the fan-shaped plate is evenly provided with limiting components. This allows for more precise injection of waste liquid into the waste liquid tank, preventing the waste liquid from being misaligned and injected into the waste liquid tank due to the bending of the outlet pipe. At the same time, during the movement, the limiting components not only keep the outlet pipe in a vertical position but also clean the residual waste liquid at its bottom, preventing the outlet pipe from splashing residual liquid onto the inner wall of the storage tank during the movement, thus increasing the cleaning work.

[0005] Furthermore, the bottom of the installation mechanism is engaged with the top of the main body, the bottom of the collection mechanism is engaged with the inner wall of the main body, a plug is fixedly connected to the outer wall of the main body, and an air extraction pipe is fixedly connected to the end of the plug away from the main body.

[0006] Furthermore, the main body includes a box, with a telescopic column fixedly connected to the bottom of the inner wall of the box, a fixed plate fixedly connected to the top of the telescopic column, a central shaft rotatably connected to the end of the inner wall of the box away from the telescopic column, a turntable fixedly connected to the outer wall of the central shaft, a set of locking blocks evenly arranged on the top of the turntable, the bottom of the locking blocks fixedly connected to the top of the turntable, fan-shaped holes symmetrically opened on the surface of the turntable, a first air extraction hole opened on the outer wall of the box, and sealing plates symmetrically arranged on the outer wall of the box, the inner wall of the sealing plates engaging with the outer wall of the turntable.

[0007] Furthermore, the collection mechanism includes a storage tank, the bottom of which is engaged with the top of the turntable. A second vent hole is provided on the outer wall of the storage tank. First telescopic rods are evenly arranged on the inner wall of the storage tank. The bottom of the first telescopic rods is fixedly connected to the bottom of the inner wall of the storage tank. A frame is fixedly connected to the top of the first telescopic rods. A mounting frame is provided on the inner wall of the storage tank. The bottom of the mounting frame is in contact with the bottom of the inner wall of the storage tank. Waste liquid tanks are evenly arranged on the inner wall of the mounting frame. The outer wall of the waste liquid tanks is fitted into the inner wall of the mounting frame.

[0008] Furthermore, the installation mechanism includes a cover plate, the bottom of which is engaged with the top of the housing. Mounting blocks are evenly distributed on the top of the cover plate, and the bottom of each mounting block is fixedly connected to the bottom of the cover plate. An extraction column is mounted on the top of each mounting block, and the bottom of the extraction column is sleeved with the inner wall of the mounting block. Limiting rings are evenly distributed on the bottom of the cover plate, and the top of each limiting ring is fixedly connected to the bottom of the cover plate. A fixing plug is located inside each limiting ring, and the top of the fixing plug is fixedly connected to the bottom of the cover plate. Magnetic blocks are symmetrically distributed on the outer wall of the fixing plug, and the outer wall of each magnetic block is fixedly connected to the outer wall of the fixing plug. A liquid outlet pipe is located on the inner wall of the fixing plug, and the outer wall of the liquid outlet pipe is sleeved with the inner wall of the fixing plug.

[0009] Furthermore, the limiting component includes a fixing frame, the bottom of which is fixedly connected to the top of the sector plate. Two fixing frames are symmetrically arranged. A first rotating block is rotatably connected to the inner wall of the fixing frame. An elastic ring is fixedly connected to the bottom of the first rotating block. A second rotating block is fixedly connected to the top of the elastic ring away from the first rotating block. The outer wall of the second rotating block is rotatably connected to the inner wall of the fixing frame. Limiting blocks are symmetrically arranged on the inner wall of the elastic ring. The outer wall of the limiting blocks is fixedly connected to the inner wall of the elastic ring. The inner wall of the limiting blocks is sleeved with the outer wall of the liquid outlet pipe. An arc-shaped plate is rotatably connected to the bottom of the sector plate near the second rotating block. A sponge block is fixedly connected to the inner wall of the arc-shaped plate to absorb the residual waste liquid at the bottom of the liquid outlet pipe, preventing waste liquid from splashing everywhere, keeping the liquid outlet pipe in a vertical state, and allowing the waste liquid to be directly injected into the waste liquid tank, avoiding waste liquid splashing, increasing cleaning difficulty, and contaminating the equipment.

[0010] The beneficial effects of this invention are as follows: 1. In solid-phase extraction, the cover of the extraction column needs to be opened twice to remove and place the collection tube to collect waste liquid and eluent. The whole operation is quite cumbersome. This invention, by setting up a main body mechanism and a collection mechanism, allows for quick replacement when the waste liquid is full through simple operation. There is no need to manually open the box, lift the extraction column, remove the waste liquid tank, and then replace it. This keeps the extraction column connection more stable, avoids tipping during replacement, avoids waste of raw materials, shortens the downtime of the extraction column, speeds up the extraction process, keeps the inside of the box clean, and avoids moisture affecting the staff's observation of the waste liquid tank.

[0011] 2. During extraction, the outlet pipe is usually curved, causing the waste liquid to flow out rather than vertically downwards. This can easily lead to splashing of waste liquid inside the tank, contaminating the inner wall of the equipment. This invention addresses this by incorporating an auxiliary mechanism to ensure more precise injection of waste liquid into the waste liquid tank. This prevents the waste liquid from being misaligned due to the curved outlet pipe. Furthermore, during movement, the limiting component not only keeps the outlet pipe vertical but also cleans up any residual waste liquid at the bottom, preventing the outlet pipe from splashing residual liquid onto the inner wall of the storage tank and increasing cleaning workload.

[0012] 3. In existing technologies, waste liquid is usually allowed to flow out directly during extraction. When changing the waste liquid tank, the liquid remaining at the bottom of the outlet pipe will fall off and adhere to the inner wall of the storage tank. This invention sets up an installation mechanism and auxiliary limiting components to clean the bottom of the outlet pipe, allowing the sponge to absorb the waste liquid remaining at the bottom of the outlet pipe, thus avoiding waste liquid splashing everywhere, increasing cleaning difficulty, and contaminating the equipment.

[0013] 4. When the waste liquid is injected into the waste liquid tank through the outlet pipe, the outlet pipe is a rubber tube, and the curvature of each outlet pipe is inconsistent, which can easily cause the waste liquid to become skewed when flowing out, making it impossible for the waste liquid to fall accurately into the waste liquid tank. This invention sets up a limiting component to keep the outlet pipe in a vertical state when the waste liquid flows out, so that the outlet pipe remains stable during use, allowing the waste liquid to be injected accurately into the waste liquid tank, reducing splashing of waste liquid, avoiding a large amount of waste liquid contacting the inner wall of the equipment, and increasing manual cleaning work. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the main structure of the present invention; Figure 4 This is a cross-sectional view of the collecting mechanism of the present invention; Figure 5 This is a cross-sectional view of the mounting mechanism of the present invention; Figure 6 This is a schematic diagram of the auxiliary mechanism of the present invention; Figure 7 This is a schematic diagram of the structure of the limiting component of the present invention; Figure 8 This is a partial structural schematic diagram of the limiting component of the present invention.

[0015] In the diagram: 1. Main structure; 101. Box body; 102. Telescopic column; 103. Fixing plate; 104. Central shaft; 105. Turntable; 106. Locking block; 107. Fan-shaped hole; 108. First vent hole; 2. Collection mechanism; 201. Storage slot; 202. Second vent hole; 203. First telescopic rod; 204. Frame; 205. Mounting frame; 206. Waste liquid tank; 3. Plug; 4. Venting pipe; 5. Installation mechanism; 501. Cover plate; 50 2. Mounting block; 503. Extraction column; 504. Limiting ring; 505. Fixing plug; 506. Magnetic block; 507. Liquid outlet pipe; 6. Auxiliary mechanism; 601. Second telescopic rod; 602. Sector plate; 603. Round hole; 604. Limiting assembly; 6041. Fixing frame; 6042. First rotating block; 6043. Elastic ring; 6044. Limiting block; 6045. Second rotating block; 6046. Arc plate; 6047. Sponge block; 7. Sealing plate. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0017] Example 1, please refer to Figures 1-5 The present invention provides a technical solution: a solid phase extraction device for sample pretreatment is described below.

[0018] Includes: a main body 1, a collection mechanism 2 symmetrically arranged on the inner wall of the main body 1, two sets of collection mechanisms 2 used alternately, and an installation mechanism 5 arranged on the top of the main body 1; The solid-phase extraction apparatus for sample pretreatment also includes: Auxiliary mechanism 6 is used to ensure that the waste liquid can flow accurately into the collection mechanism 2 during extraction. The top of the auxiliary mechanism 6 is fixedly connected to the bottom of the mounting mechanism 5. The bottom of the mounting mechanism 5 is engaged with the top of the main body mechanism 1, the bottom of the collecting mechanism 2 is engaged with the inner wall of the main body mechanism 1, a plug 3 is fixedly connected to the outer wall of the main body mechanism 1, and an air extraction pipe 4 is fixedly connected to the end of the plug 3 away from the main body mechanism 1. The air extraction pipe 4 is connected to a vacuum pump.

[0019] Before use, first rotate the collection mechanism 2 into the main body mechanism 1, then cover the mounting mechanism 5, insert the appropriate extraction column 503 into the top of the mounting mechanism 5, then inject the reagent into the extraction column 503, turn on the vacuum pump to evacuate the inside of the main body mechanism 1, so that the liquid quickly passes through the extraction column 503 and enters the collection mechanism 2 for collection. When there is a lot of waste liquid stored in the collection mechanism 2, rotate another set of collection mechanisms 2 into the main body mechanism 1 to continue extraction. The auxiliary mechanism 6 can ensure that the waste liquid flowing out of the mounting mechanism 5 can accurately flow into the collection mechanism 2 during extraction.

[0020] The main body 1 includes a box 101, which is a transparent plastic hard shell. A telescopic column 102 is fixedly connected to the bottom of the inner wall of the box 101, and a fixing plate 103 is fixedly connected to the top of the telescopic column 102. The fixing plate 103 is fan-shaped. A central shaft 104 is rotatably connected to the end of the inner wall of the box 101 away from the telescopic column 102. A turntable 105 is fixedly connected to the outer wall of the central shaft 104. A locking block 106 is evenly arranged on the top of the turntable 105. The bottom of the locking block 106 is fixedly connected to the top of the turntable 105. Fan-shaped holes 107 are symmetrically opened on the surface of the turntable 105. A first air extraction hole 108 is opened on the outer wall of the box 101. Two sealing plates 7 are symmetrically arranged on the outer wall of the box 101 to block both sides of the box 101, so that the inside of the box 101 is sealed. The inner wall of the sealing plate 7 is engaged with the outer wall of the turntable 105.

[0021] The collection mechanism 2 includes a storage tank 201, which is a transparent plastic hard shell. The bottom of the storage tank 201 is engaged with the top of the turntable 105. A second air extraction hole 202 is provided on the outer wall of the storage tank 201. A first telescopic rod 203 is evenly arranged on the inner wall of the storage tank 201. The bottom of the first telescopic rod 203 is fixedly connected to the bottom of the inner wall of the storage tank 201. A frame 204 is fixedly connected to the top of the first telescopic rod 203. The surface of the frame 204 is covered with absorbent fabric. A mounting frame 205 is provided on the inner wall of the storage tank 201. The bottom of the mounting frame 205 is in contact with the bottom of the inner wall of the storage tank 201. A circular hole is provided on the top of the mounting frame 205 so that the waste liquid tank 206 can be placed in the storage tank 201. Waste liquid tanks 206 are evenly arranged on the inner wall of the mounting frame 205. The outer wall of the waste liquid tank 206 is fitted into the inner wall of the mounting frame 205.

[0022] In use, the two sets of storage slots 201 are placed in the grooves formed by the locking blocks 106 on the surface of the turntable 105. Then, the turntable 105 is manually rotated to rotate one set of collection mechanisms 2 into the interior of the box 101, so that the position of the fan-shaped hole 107 is aligned with the fixing plate 103. Then, the sealing plate 7 is locked onto the turntable 105, so that the sealing plate 7 contacts the outer wall of the box 101. Then, the telescopic column 102 extends upward, so that the fixing plate 103 lifts the storage slot 201 and moves it upward, so that the storage slot 201 is separated from the turntable 105. It stops when the first air extraction hole 108 and the second air extraction hole 202 are aligned. During the upward movement of the storage slot 201, the frame 204 contacts the inner wall of the box 101 and rubs against the inner wall of the box 101, so that the water vapor left on the inner wall of the box 101 is absorbed by the water-absorbing cloth on the surface of the frame 204, keeping the inner wall of the box 101 clean.

[0023] After the storage tank 201 is placed, the reagent is injected into the extraction column 503, and then the vacuum pump is turned on to make the reagent pass through the extraction column 503 quickly and then flow into the waste liquid tank 206. After the liquid in the waste liquid tank 206 is gradually filled, the telescopic column 102 drives the storage tank 201 to descend, so that the storage tank 201 contacts the turntable 105. Then the seal is removed, and the turntable 105 is rotated to allow another set of storage tanks 201 to enter the box 101. The above operation is repeated to continue the extraction. Then the user takes out the liquid in the waste liquid tank 206 one by one and pours it out, waiting for the next use.

[0024] Through simple operation, the waste liquid can be quickly replaced when it is full, without the need for manual opening of the tank 101, lifting the extraction column 503 to remove the waste liquid tank, and then replacing it. This keeps the connection of the extraction column 503 more stable, avoids tipping during the replacement process, avoids waste of raw materials, shortens the downtime of the extraction column 503, speeds up the extraction process, keeps the inside of the tank 101 clean, and prevents moisture from affecting the staff's observation of the waste liquid tank 206.

[0025] The mounting mechanism 5 includes a cover plate 501, the bottom of which is engaged with the top of the housing 101. Mounting blocks 502 are evenly distributed on the top of the cover plate 501, and their bottoms are fixedly connected to the bottom of the cover plate 501. An extraction column 503 is mounted on the top of the mounting block 502, and its bottom is fitted into the inner wall of the mounting block 502. Limiting rings 504 are evenly distributed on the bottom of the cover plate 501, their tops fixedly connected to the bottom of the cover plate 501. The inner wall of the limiting rings 504 is arc-shaped. Inside the ring 504, there is a fixing plug 505. The top of the fixing plug 505 is fixedly connected to the bottom of the cover plate 501. The fixing plug 505 is made of a material with low friction. Magnetic blocks 506 are symmetrically arranged on the outer wall of the fixing plug 505. The outer wall of the magnetic blocks 506 is fixedly connected to the outer wall of the fixing plug 505. An outlet tube 507 is provided on the inner wall of the fixing plug 505. The outlet tube 507 is a transparent rubber tube. The outer wall of the outlet tube 507 is sleeved with the inner wall of the fixing plug 505. The inner wall of the fixing plug 505 and the outer wall of the outlet tube 507 do not contact each other.

[0026] The auxiliary mechanism 6 includes a second telescopic rod 601. The top of the second telescopic rod 601 is fixedly connected to the bottom of the mounting mechanism 5. A fan-shaped plate 602 is fixedly connected to the bottom of the second telescopic rod 601. Circular holes 603 are evenly opened on the surface of the fan-shaped plate 602. Limiting components 604 are evenly arranged on the top of the fan-shaped plate 602.

[0027] After placing the collection mechanism 2, install the extraction columns 503 one by one on the mounting block 502, then place the cover plate 501 on the box 101. After placing the storage tank 201, extend the second telescopic rod 601 and move the sector plate 602 downward, so that the limiting component 604 moves downward along the liquid outlet pipe 507 and fixes the bottom of the liquid outlet pipe 507, keeping the liquid outlet pipe 507 in a vertical state. Then, inject the reagent into the extraction column 503, turn on the vacuum pump, and the waste liquid flows through the liquid outlet pipe 507 into the waste liquid tank 206. When the waste liquid is about to be filled, stop injecting the reagent, and the telescopic column 102 drives the sector plate 602 to rise. During the rising process, the limiting component 604 gradually contacts the limiting ring 504, so that the limiting component 604 wipes the bottom of the liquid outlet pipe 507, so that the liquid residue at the bottom of the liquid outlet pipe 507 is cleaned. Then, remove the collection mechanism 2 for replacement.

[0028] This allows for more precise injection of waste liquid into the waste liquid tank 206, preventing the waste liquid from being misaligned and injected into the waste liquid tank 206 due to the bending of the outlet pipe 507. At the same time, during the movement, the limiting component 604 not only keeps the outlet pipe 507 in a vertical position, but also cleans up the residual waste liquid at its bottom, preventing the outlet pipe 507 from splashing residual liquid onto the inner wall of the storage tank 201 during the movement, thus increasing the cleaning work.

[0029] Example 2, please refer to Figures 1-8 The present invention provides a technical solution: Based on Embodiment 1, the limiting component 604 includes a fixing frame 6041, the bottom of which is fixedly connected to the top of the sector plate 602. Two fixing frames 6041 are symmetrically arranged. A first rotating block 6042 is rotatably connected to the inner wall of the fixing frame 6041. An elastic ring 6043 is fixedly connected to the bottom of the first rotating block 6042. The elastic ring 6043 is made of rubber. A second rotating block 6045 is fixedly connected to the top of the elastic ring 6043 away from the first rotating block 6042. The tops of the first rotating block 6042 and the second rotating block 6045 are made of iron, and the bottoms are made of plastic. The outer wall of the second rotating block 6045 is rotatably connected to the inner wall of the fixed frame 6041. The protruding part at the bottom of the second rotating block 6045 is U-shaped, which facilitates contact with the arc plate 6046. The inner wall of the elastic ring 6043 is symmetrically provided with limit blocks 6044. The outer wall of the limit block 6044 is fixedly connected to the inner wall of the elastic ring 6043. The limit block 6044 is made of a material with low friction. The inner wall of the limit block 6044 is sleeved with the outer wall of the liquid outlet pipe 507. The arc plate 6046 is rotatably connected to the bottom of the fan plate 602 near the second rotating block 6045. The inner wall of the arc plate 6046 is fixedly connected to a sponge block 6047.

[0030] During extraction, the sector plate 602 moves downward under the action of the second telescopic rod 601. At this time, the first rotating block 6042 and the second rotating block 6045 move downward along the outlet pipe 507. The elastic ring 6043 drives the bottoms of the first rotating block 6042 and the second rotating block 6045 to move closer to each other, so that the limiting block 6044 covers the bottom of the outlet pipe 507, keeping the outlet pipe 507 in a vertical position. When it is necessary to replace the waste liquid tank 206, the second telescopic rod 601 drives the sector plate 602 upward, so that the tops of the first rotating block 6042 and the second rotating block 6045 contact the inner wall of the limiting ring 504, and gradually move downward under the action of the arc-shaped inner wall of the limiting ring 504. The first rotating block 6042 and the second rotating block 6045 are opened, and their tops are attracted to the magnetic block 506. The bottoms of the first rotating block 6042 and the second rotating block 6045 are kept open, so that the second rotating block 6045 contacts the arc plate 6046 and pushes the top of the arc plate 6046 outward, so that the bottom of the arc plate 6046 rotates to the bottom of the liquid outlet pipe 507, so that the sponge contacts the bottom of the liquid outlet pipe 507 and absorbs the waste liquid remaining at the bottom of the liquid outlet pipe 507, preventing the waste liquid from splashing everywhere. The liquid outlet pipe 507 is kept in a vertical state, so that the waste liquid is directly injected into the waste liquid tank 206, avoiding waste liquid splashing, increasing cleaning difficulty, and contaminating the equipment.

[0031] The specific workflow is as follows: In use, the two sets of storage slots 201 are placed in the grooves formed by the locking blocks 106 on the surface of the turntable 105. Then, the turntable 105 is manually rotated to rotate one set of collection mechanisms 2 into the interior of the box 101, so that the position of the fan-shaped hole 107 is aligned with the fixing plate 103. Then, the sealing plate 7 is locked onto the turntable 105, so that the sealing plate 7 contacts the outer wall of the box 101. Then, the telescopic column 102 extends upward, so that the fixing plate 103 lifts the storage slot 201 and moves it upward, so that the storage slot 201 is separated from the turntable 105. It stops when the first air extraction hole 108 and the second air extraction hole 202 are aligned. During the upward movement of the storage slot 201, the frame 204 contacts the inner wall of the box 101 and rubs against the inner wall of the box 101, so that the water vapor left on the inner wall of the box 101 is absorbed by the water-absorbing cloth on the surface of the frame 204, keeping the inner wall of the box 101 clean.

[0032] After placing the collection mechanism 2, install the extraction columns 503 one by one on the mounting block 502, then place the cover plate 501 on the box 101. After placing the storage tank 201, extend the second telescopic rod 601 and move the sector plate 602 downward, so that the limiting component 604 moves downward along the liquid outlet pipe 507 and fixes the bottom of the liquid outlet pipe 507, keeping the liquid outlet pipe 507 in a vertical state. Then, inject the reagent into the extraction column 503, turn on the vacuum pump, and the waste liquid flows through the liquid outlet pipe 507 into the waste liquid tank 206. When the waste liquid is about to be filled, stop injecting the reagent, and the telescopic column 102 drives the sector plate 602 to rise. During the rising process, the limiting component 604 gradually contacts the limiting ring 504, so that the limiting component 604 wipes the bottom of the liquid outlet pipe 507, so that the liquid residue at the bottom of the liquid outlet pipe 507 is cleaned. Then, remove the collection mechanism 2 for replacement.

[0033] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A solid-phase extraction apparatus for sample pretreatment, specifically comprising: The main body (1) is characterized in that: a collection mechanism (2) is symmetrically arranged on the inner wall of the main body (1), an installation mechanism (5) is arranged on the top of the main body (1), and the main body (1) includes a box (101); The installation mechanism (5) includes a cover plate (501), the bottom of which is engaged with the top of the box (101), and mounting blocks (502) are evenly arranged on the top of the cover plate (501). The bottom of the mounting blocks (502) is fixedly connected to the bottom of the cover plate (501). An extraction column (503) is arranged on the top of the mounting block (502), and the bottom of the extraction column (503) is sleeved with the inner wall of the mounting block (502). The bottom of the cover plate (501) is uniformly provided with limiting rings (504), the top of the limiting rings (504) is fixedly connected to the bottom of the cover plate (501), the inside of the limiting rings (504) is provided with fixing plugs (505), the top of the fixing plugs (505) is fixedly connected to the bottom of the cover plate (501), the outer wall of the fixing plugs (505) is symmetrically provided with magnetic blocks (506), the outer wall of the magnetic blocks (506) is fixedly connected to the outer wall of the fixing plugs (505), the inner wall of the fixing plugs (505) is provided with liquid outlet pipes (507), the outer wall of the liquid outlet pipes (507) is sleeved with the inner wall of the fixing plugs (505), and the inner wall of the limiting rings (504) is arc-shaped. The solid-phase extraction apparatus for sample pretreatment also includes: An auxiliary mechanism (6) is used to ensure that the waste liquid can flow accurately into the collection mechanism (2) during extraction. The top of the auxiliary mechanism (6) is fixedly connected to the bottom of the mounting mechanism (5). The auxiliary mechanism (6) includes a second telescopic rod (601), the top of the second telescopic rod (601) is fixedly connected to the bottom of the mounting mechanism (5), and a fan-shaped plate (602) is fixedly connected to the bottom of the second telescopic rod (601). The surface of the fan-shaped plate (602) is uniformly provided with round holes (603), and the top of the fan-shaped plate (602) is uniformly provided with limit components (604). The limiting component (604) includes a fixing frame (6041), the bottom of which is fixedly connected to the top of the fan-shaped plate (602). Two fixing frames (6041) are symmetrically arranged. A first rotating block (6042) is rotatably connected to the inner wall of the fixing frame (6041). An elastic ring (6043) is fixedly connected to the bottom of the first rotating block (6042). A second rotating block (6045) is fixedly connected to the top of the elastic ring (6043) away from the first rotating block (6042). The outer wall of the second rotating block (6045) is rotatably connected to the inner wall of the fixing frame (6041). The inner wall of the elastic ring (6043) is symmetrically provided with limiting blocks (6044). The outer wall of the limiting block (6044) is fixedly connected to the inner wall of the elastic ring (6043). The inner wall of the limiting block (6044) is sleeved with the outer wall of the liquid outlet pipe (507). The bottom of the fan-shaped plate (602) is rotatably connected to the side near the second rotating block (6045). The inner wall of the arc plate (6046) is fixedly connected to a sponge block (6047). The tops of the first rotating block (6042) and the second rotating block (6045) are made of iron. The second telescopic rod (601) drives the fan-shaped plate (602) upward, so that the tops of the first rotating block (6042) and the second rotating block (6045) contact the inner wall of the limiting ring (504), and gradually open under the action of the arc-shaped inner wall of the limiting ring (504), and the tops of the first rotating block (6042) and the second rotating block (6045) attract the magnetic block (506), keeping the bottoms of the first rotating block (6042) and the second rotating block (6045) in an open state, so that the second rotating block (6045) contacts the arc-shaped plate (6046), and pushes the top of the arc-shaped plate (6046) outward, so that the bottom of the arc-shaped plate (6046) rotates to the bottom of the liquid outlet pipe (507), so that the sponge contacts the bottom of the liquid outlet pipe (507).

2. The solid-phase extraction apparatus for sample pretreatment according to claim 1, characterized in that: The bottom of the installation mechanism (5) is engaged with the top of the main body mechanism (1), the bottom of the collection mechanism (2) is engaged with the inner wall of the main body mechanism (1), a plug (3) is fixedly connected to the outer wall of the main body mechanism (1), and an air extraction pipe (4) is fixedly connected to the end of the plug (3) away from the main body mechanism (1).

3. The solid-phase extraction apparatus for sample pretreatment according to claim 1, characterized in that: The bottom of the inner wall of the box (101) is fixedly connected to a telescopic column (102), the top of the telescopic column (102) is fixedly connected to a fixing plate (103), and the end of the inner wall of the box (101) away from the telescopic column (102) is rotatably connected to a central shaft (104).

4. The solid-phase extraction apparatus for sample pretreatment according to claim 3, characterized in that: A turntable (105) is fixedly connected to the outer wall of the central shaft (104). A locking block (106) is evenly arranged on the top of the turntable (105). The bottom of the locking block (106) is fixedly connected to the top of the turntable (105). A fan-shaped hole (107) is symmetrically opened on the surface of the turntable (105). A first air extraction hole (108) is opened on the outer wall of the box (101). A sealing plate (7) is symmetrically arranged on the outer wall of the box (101). The inner wall of the sealing plate (7) is engaged with the outer wall of the turntable (105).

5. The solid-phase extraction apparatus for sample pretreatment according to claim 4, characterized in that: The collection mechanism (2) includes a storage tank (201), the bottom of which is engaged with the top of the turntable (105). A second air extraction hole (202) is provided on the outer wall of the storage tank (201). A first telescopic rod (203) is evenly arranged on the inner wall of the storage tank (201). The bottom of the first telescopic rod (203) is fixedly connected to the bottom of the inner wall of the storage tank (201). A frame (204) is fixedly connected to the top of the first telescopic rod (203). A mounting frame (205) is provided on the inner wall of the storage tank (201). The bottom of the mounting frame (205) is in contact with the bottom of the inner wall of the storage tank (201). Waste liquid tanks (206) are evenly arranged on the inner wall of the mounting frame (205). The outer wall of the waste liquid tank (206) is sleeved with the inner wall of the mounting frame (205).

Images