Solid-phase extraction equipment for sample pretreatment

Abstract

The invention belongs to the technical field of solid-phase extraction, and particularly relates to solid-phase extraction equipment for sample pretreatment, the solid-phase extraction equipment comprises a main body mechanism, collection mechanisms are symmetrically arranged on the inner wall of the main body mechanism, and a mounting mechanism is arranged at the top of the main body mechanism; the solid-phase extraction equipment for sample pretreatment further comprises an auxiliary mechanism, the auxiliary mechanism is used for keeping waste liquid to accurately flow into the collecting mechanism during extraction, and the top of the auxiliary mechanism is fixedly connected with the bottom of the mounting mechanism. The box body does not need to be manually opened, the extraction column does not need to be held up, the waste liquid barrel is taken out and then replaced, toppling and raw material waste caused in the replacement process are avoided, the shutdown time of the extraction column is shortened, the extraction progress is accelerated, and the interior of the box body is kept clean; the water vapor is prevented from influencing the waste liquid tank observation condition of workers.

Description

Technical Field

[0001] The invention belongs to the technical field of solid phase extraction, in particular to a solid phase extraction device for sample pretreatment. Background Art

[0002] Solid phase extraction uses selective adsorption and selective elution to enrich, separate and purify samples. It is widely used in many fields such as pesticide residue detection, food analysis, medicine, and commercial inspection. In the existing technology, solid phase extraction devices mainly include positive pressure type and negative pressure type, that is, using a vacuum pump to draw a vacuum and using a piston to pressurize the air. The vacuum solid phase extraction device can realize batch processing of solid phase extraction columns.

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

[0004] In view of the shortcomings of the prior art, the present invention solves the technical problems by adopting a technical solution: a solid phase extraction device for sample pretreatment, comprising: a main body mechanism, wherein 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;

[0005] The solid phase extraction device for sample pretreatment also includes:

[0006] An auxiliary mechanism, which is used to ensure that the waste liquid can accurately flow into the collecting mechanism during extraction, and the top of the auxiliary mechanism is fixedly connected to the bottom of the mounting mechanism;

[0007] The auxiliary mechanism includes a second telescopic rod, the top of the second telescopic rod is fixedly connected to the bottom of the mounting mechanism, the bottom of the second telescopic rod is fixedly connected to a fan-shaped plate, the surface of the fan-shaped plate is evenly provided with circular holes, and the top of the fan-shaped plate is evenly provided with a limiting component, so that the waste liquid can be injected into the waste liquid tank more accurately, and it is avoided that the waste liquid cannot be injected into the waste liquid tank due to the bending of the liquid outlet pipe. At the same time, during the movement, the limiting component can not only keep the liquid outlet pipe in a vertical state, but also clean the residual waste liquid at the bottom thereof, and avoid the liquid outlet pipe from throwing the residual liquid onto the inner wall of the storage tank during the movement, resulting in increased cleaning work.

[0008] Furthermore, the bottom of the mounting mechanism is snap-fitted to the top of the main mechanism, the bottom of the collecting mechanism is snap-fitted to the inner wall of the main mechanism, the outer wall of the main mechanism is fixedly connected with a plug, and one end of the plug away from the main mechanism is fixedly connected with an exhaust pipe.

[0009] Further, the main mechanism includes a box body, a telescopic column is fixedly connected to the bottom of the inner wall of the box body, a fixed plate is fixedly connected to the top of the telescopic column, the inner wall of the box body is rotatably connected to the central axis at one end away from the telescopic column, a turntable is fixedly connected to the outer wall of the central axis, blocks are evenly arranged on the top of the turntable, the bottom of the blocks is fixedly connected to the top of the turntable, fan-shaped holes are symmetrically provided on the surface of the turntable, a first air extraction hole is provided on the outer wall of the box body, and a sealing plate is symmetrically provided on the outer wall of the box body, and the inner wall of the sealing plate is clamped with the outer wall of the turntable.

[0010] Furthermore, the collecting mechanism includes a storage trough, the bottom of which is snap-fitted to the top of the turntable, a second air exhaust hole is opened on the outer wall of the storage trough, a first telescopic rod is evenly arranged on the inner wall of the storage trough, the bottom of the first telescopic rod is fixedly connected to the bottom of the inner wall of the storage trough, a frame is fixedly connected to the top of the first telescopic rod, a placing rack is arranged on the inner wall of the storage trough, the bottom of the placing rack is in contact with the bottom of the inner wall of the storage trough, a waste liquid tank is evenly arranged on the inner wall of the placing rack, and the outer wall of the waste liquid tank is socketed with the inner wall of the placing rack.

[0011] Further, the mounting mechanism includes a cover plate, the top of the cover plate is snap-fitted with the top of the box body, the top of the cover plate is evenly provided with mounting blocks, the bottom of the mounting blocks is fixedly connected to the bottom of the cover plate, the top of the mounting block is provided with an extraction column, the bottom of the extraction column is sleeved with the inner wall of the mounting block, the bottom of the cover plate is evenly provided with a limiting ring, the top of the limiting ring is fixedly connected to the bottom of the cover plate, a fixing plug is provided inside the limiting ring, the top of the fixing plug is fixedly connected to the bottom of the cover plate, the outer wall of the fixing plug is symmetrically provided with magnetic blocks, the outer wall of the magnetic blocks is fixedly connected to the outer wall of the fixing plug, the inner wall of the fixing plug is provided with a liquid outlet pipe, the outer wall of the liquid outlet pipe is sleeved with the inner wall of the fixing plug.

[0012] Furthermore, the limit assembly includes a fixed frame, the bottom of the fixed frame is fixedly connected to the top of the fan-shaped plate, the fixed frame is symmetrically provided with two, the inner wall of the fixed frame is rotatably connected with the first rotating block, the bottom of the first rotating block is fixedly connected with an elastic ring, the top of the elastic ring is fixedly connected with the second rotating block at one end away from the first rotating block, the outer wall of the second rotating block is rotatably connected to the inner wall of the fixed frame, the inner wall of the elastic ring is symmetrically provided with a limit block, the outer wall of the limit block is fixedly connected to the inner wall of the elastic ring, the inner wall of the limit block is socketed with the outer wall of the liquid outlet pipe, the bottom of the fan plate is rotatably connected with an arc plate on one side close to the second rotating block, the inner wall of the arc plate is fixedly connected with a sponge block, the waste liquid residual at the bottom of the liquid outlet pipe is absorbed to avoid the waste liquid splashing everywhere, and the liquid outlet pipe is kept in a vertical state, so that the waste liquid is directly injected into the waste liquid tank to avoid the waste liquid splashing, which increases the difficulty of cleaning and pollutes the equipment.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. When performing solid phase extraction, it is necessary to open the cover plate equipped with the extraction column twice to take out and place the collecting tube to collect the waste liquid and the eluent. The whole operation process is relatively cumbersome. The present invention sets a main body mechanism and a collecting mechanism, and through simple operation, when the waste liquid is fully collected, it can be quickly replaced. There is no need to manually open the box body, pick up the extraction column to take out the waste liquid barrel, and then replace it. The connection of the extraction column is kept more stable, and tipping during the replacement process is avoided, resulting in waste of raw materials, shortening the downtime of the extraction column, accelerating the extraction progress, keeping the inside of the box body clean, and avoiding water vapor from affecting the staff's observation of the waste liquid tank.

[0015] 2. During extraction, since the liquid outlet pipe is usually bent, the waste liquid does not flow vertically downward when it flows out, which can easily cause the waste liquid to splash in the box, causing the inner wall of the box to be contaminated with waste liquid, and causing pollution to the inner wall of the equipment. The present invention provides an auxiliary mechanism to enable the waste liquid to be injected into the waste liquid tank more accurately, thereby avoiding the waste liquid from being unable to be injected into the waste liquid tank due to the bending of the liquid outlet pipe. At the same time, during the movement, the limit assembly can not only keep the liquid outlet pipe in a vertical state, but also clean the residual waste liquid at the bottom thereof, thereby avoiding the liquid outlet pipe from throwing the residual liquid onto the inner wall of the storage tank during the movement, thereby increasing the cleaning work.

[0016] 3. In the prior art, waste liquid is usually allowed to flow out directly during extraction. When the waste liquid tank is replaced, the liquid remaining at the bottom of the liquid outlet pipe will fall off and adhere to the inner wall of the storage tank. The present invention provides an installation mechanism and an auxiliary limit assembly to clean the bottom of the liquid outlet pipe, so that the sponge absorbs the waste liquid remaining at the bottom of the liquid outlet pipe, thereby preventing the waste liquid from splashing everywhere, increasing the difficulty of cleaning and polluting the equipment.

[0017] 4. When the liquid outlet pipe injects the waste liquid into the waste liquid tank, since the liquid outlet pipe is a rubber tube and the bending degree of each liquid outlet pipe is inconsistent, it is easy to cause the waste liquid to be skewed when it flows out, so that the waste liquid cannot fall accurately into the waste liquid tank. The present invention sets a limit assembly to keep the liquid outlet pipe in a vertical state when the waste liquid flows out, so that the liquid outlet pipe remains stable during use, and the waste liquid is accurately injected into the waste liquid tank, which reduces the splashing of the waste liquid, avoids the waste liquid from contacting the inner wall of the equipment in large quantities, and increases manual cleaning work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 is a cross-sectional view of the present invention;

[0020] Figure 3 It is a cross-sectional view of the main mechanism of the present invention;

[0021] Figure 4 is a cross-sectional view of the collecting mechanism of the present invention;

[0022] Figure 5 is a cross-sectional view of the mounting mechanism of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the auxiliary mechanism of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the limit assembly of the present invention;

[0025] Figure 8 It is a partial structural schematic diagram of the limiting component of the present invention.

[0026] In the figure: 1. main body; 101. box; 102. telescopic column; 103. fixing plate; 104. central axis; 105. turntable; 106. block; 107. fan-shaped hole; 108. first air extraction hole; 2. collecting mechanism; 201. storage tank; 202. second air extraction hole; 203. first telescopic rod; 204. frame; 205. mounting rack; 206. waste liquid tank; 3. plug; 4. air extraction pipe; 5. mounting mechanism; 501. cover plate; 502. 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. Fan-shaped plate; 603. Round hole; 604. Limiting assembly; 6041. Fixed 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 DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0028] Example 1, please refer to Figure 1-Figure 5 The present invention provides a technical solution: a solid phase extraction device for sample pretreatment is described as follows.

[0029] It comprises: a main body mechanism 1, the inner wall of the main body mechanism 1 is symmetrically provided with a collecting mechanism 2, the collecting mechanism 2 is provided with two groups, which are used alternately, and the top of the main body mechanism 1 is provided with a mounting mechanism 5;

[0030] The solid phase extraction device for sample pretreatment also includes:

[0031] An auxiliary mechanism 6, which is used to ensure that the waste liquid can accurately flow into the collecting mechanism 2 during extraction, and the top of the auxiliary mechanism 6 is fixedly connected to the bottom of the mounting mechanism 5;

[0032] The bottom of the mounting mechanism 5 is snap-fitted to the top of the main mechanism 1, the bottom of the collecting mechanism 2 is snap-fitted to the inner wall of the main mechanism 1, the outer wall of the main mechanism 1 is fixedly connected with a plug 3, the end of the plug 3 away from the main mechanism 1 is fixedly connected with an exhaust pipe 4, and the exhaust pipe 4 is externally connected to a vacuum pump.

[0033] Before use, first rotate the collecting mechanism 2 to the inside of the main mechanism 1, then cover the mounting mechanism 5, insert a suitable extraction column 503 on 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 mechanism 1, so that the liquid quickly passes through the extraction column 503 and enters the collecting mechanism 2 for collection. When there is a lot of waste liquid stored inside the collecting mechanism 2, rotate another set of collecting mechanisms 2 to the inside of the main 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 collecting mechanism 2 during extraction.

[0034] The main mechanism 1 includes a box body 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 body 101, and a fixing plate 103 is fixedly connected to the top of the telescopic column 102. The fixing plate 103 is fan-shaped. The inner wall of the box body 101 is rotatably connected to a central axis 104 at one end away from the telescopic column 102. A turntable 105 is fixedly connected to the outer wall of the central axis 104. Blocks 106 are evenly arranged on the top of the turntable 105. The bottom of the block 106 is fixedly connected to the top of the turntable 105. The surface of the turntable 105 is symmetrically provided with fan-shaped holes 107. The outer wall of the box body 101 is provided with a first air extraction hole 108. The outer wall of the box body 101 is symmetrically provided with sealing plates 7. Two sealing plates 7 are provided to block both sides of the box body 101 so that the inside of the box body 101 is in a sealed state. The inner wall of the sealing plate 7 is snapped with the outer wall of the turntable 105.

[0035] The collecting mechanism 2 comprises a storage tank 201, which is a transparent plastic hard shell. The bottom of the storage tank 201 is snap-fitted with the top of the turntable 105. The outer wall of the storage tank 201 is provided with a second air extraction hole 202. The inner wall of the storage tank 201 is evenly provided with a first telescopic rod 203. The bottom of the first telescopic rod 203 is fixedly connected to the bottom of the inner wall of the storage tank 201. The top of the first telescopic rod 203 is fixedly connected with a frame 204. The surface of the frame 204 is provided with a water-absorbing cloth. The inner wall of the storage tank 201 is provided with a placing rack 205. The bottom of the placing rack 205 is in contact with the bottom of the inner wall of the storage tank 201. The top of the placing rack 205 is provided with a circular hole so that a waste liquid tank 206 can be placed in the storage tank 201. The inner wall of the placing rack 205 is evenly provided with waste liquid tanks 206. The outer wall of the waste liquid tank 206 is socketed with the inner wall of the placing rack 205.

[0036] When in use, the two groups of storage slots 201 are placed in the grooves surrounded by the blocks 106 on the surface of the turntable 105, and then the turntable 105 is manually rotated to rotate a group of collecting mechanisms 2 to the inside of the box body 101, so that the position of the fan-shaped holes 107 is aligned with the fixing plate 103, and then the sealing plate 7 is clamped on the turntable 105, so that the sealing plate 7 contacts the outer wall of the box body 101, and then the telescopic column 102 is extended upward, so that the fixing plate 103 lifts the storage slots 201 and moves upward, so that the storage slots 201 are separated from the turntable 105, and stop after reaching the position where the first air extraction hole 108 coincides with the second air extraction hole 202. In the process of driving the storage slots 201 to move upward, the frame 204 contacts the inner wall of the box body 101 and scratches the inner wall of the box body 101, so that the water vapor retained on the inner wall of the box body 101 is absorbed by the water-absorbent cloth on the surface of the frame 204, so as to keep the inner wall of the box body 101 clean.

[0037] 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 allow the reagent to quickly pass through the extraction column 503 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, and then the seal is removed, and the turntable 105 is rotated to allow another group of storage tanks 201 to enter the box 101. Repeat the above operation to continue extraction, and 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.

[0038] Through simple operations, when the waste liquid is fully collected, it can be quickly replaced without manually opening the box 101. The extraction column 503 is picked up to take out the waste liquid barrel and then replaced. The connection of the extraction column 503 is kept more stable to avoid tipping over during the replacement process, resulting in waste of raw materials, shortening the downtime of the extraction column 503, speeding up the extraction progress, keeping the inside of the box 101 clean, and preventing water vapor from affecting the staff's observation of the waste liquid tank 206.

[0039] The mounting mechanism 5 comprises a cover plate 501, the top of the cover plate 501 is snap-fitted with the top of the box body 101, the top of the cover plate 501 is evenly provided with mounting blocks 502, the bottom of the mounting blocks 502 is fixedly connected with the bottom of the cover plate 501, the top of the mounting blocks 502 is provided with extraction columns 503, the bottom of the extraction columns 503 is sleeved with the inner wall of the mounting blocks 502, the bottom of the cover plate 501 is evenly provided with limiting rings 504, the top of the limiting rings 504 is fixedly connected with the bottom of the cover plate 501, the inner wall of the limiting rings 504 is arc-shaped, and the limiting A fixed plug 505 is arranged inside the ring 504, and the top of the fixed plug 505 is fixedly connected to the bottom of the cover plate 501. The fixed plug 505 is made of a material with low friction. The outer wall of the fixed plug 505 is symmetrically provided with magnetic blocks 506, and the outer wall of the magnetic blocks 506 is fixedly connected to the outer wall of the fixed plug 505. The inner wall of the fixed plug 505 is provided with a liquid outlet pipe 507, and the liquid outlet pipe 507 is a transparent rubber tube. The outer wall of the liquid outlet pipe 507 is sleeved with the inner wall of the fixed plug 505, and the inner wall of the fixed plug 505 does not contact the outer wall of the liquid outlet pipe 507.

[0040] The auxiliary mechanism 6 includes a second telescopic rod 601, the top of which is fixedly connected to the bottom of the mounting mechanism 5, the bottom of which is fixedly connected to a fan-shaped plate 602, the surface of which is evenly provided with circular holes 603, and the top of which is evenly provided with a limiting component 604.

[0041] After the collecting mechanism 2 is placed, the extraction columns 503 are installed one by one on the mounting block 502, and then the cover plate 501 is placed on the box body 101. After the storage tank 201 is placed, the second telescopic rod 601 is extended to move the fan-shaped 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 to keep the liquid outlet pipe 507 in a vertical state, and then injects the reagent into the extraction column 503, turns on the vacuum pump, and the waste liquid flows into the waste liquid tank 206 through the liquid outlet pipe 507. When the waste liquid is about to be filled, stop injecting the reagent, and the telescopic column 102 drives the fan-shaped 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. After the residual liquid at the bottom of the liquid outlet pipe 507 is cleaned, the collecting mechanism 2 is taken out and replaced.

[0042] This allows the waste liquid to be injected into the waste liquid tank 206 more accurately, and avoids the waste liquid being unable to be injected into the waste liquid tank 206 due to the bending of the liquid outlet pipe 507. At the same time, during the movement, the limiting component 604 can not only keep the liquid outlet pipe 507 in a vertical state, but also clean the residual waste liquid at the bottom thereof, and avoids the liquid outlet pipe 507 from throwing the residual liquid onto the inner wall of the storage tank 201 during the movement, resulting in increased cleaning work.

[0043] Example 2, please refer to Figure 1-Figure 8 The present invention provides a technical solution: on the basis of the first embodiment, the limit assembly 604 includes a fixing frame 6041, the bottom of the fixing frame 6041 is fixedly connected to the top of the fan-shaped plate 602, and the fixing frame 6041 is symmetrically provided with two fixing frames 6041. The inner wall of the fixing frame 6041 is rotatably connected with a first rotating block 6042, and the bottom of the first rotating block 6042 is fixedly connected with an elastic ring 6043, the elastic ring 6043 is made of rubber, and the top of the elastic ring 6043 is fixedly connected to the end away from the first rotating block 6042 with a second rotating block 6045, the top of the first rotating block 6042 and the second rotating block 6045 are made of iron, and the bottom is made of plastic Material, the outer wall of the second rotating block 6045 is rotatably connected to the inner wall of the fixed frame 6041, the protruding part of the bottom of the second rotating block 6045 is concave, which is convenient for contacting with the arc plate 6046, and the inner wall of the elastic ring 6043 is symmetrically provided with a limit block 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 small friction, the inner wall of the limit block 6044 is socketed with the outer wall of the liquid outlet pipe 507, the bottom of the fan-shaped plate 602 is rotatably connected to the side of the second rotating block 6045, and the inner wall of the arc plate 6046 is fixedly connected to the sponge block 6047.

[0044] During extraction, the fan-shaped plate 602 moves downward under the drive of the second telescopic rod 601. At this time, the first rotating block 6042 and the second rotating block 6045 move downward along the liquid outlet pipe 507. The elastic ring 6043 drives the bottoms of the first rotating block 6042 and the second rotating block 6045 to approach each other, so that the limit block 6044 can cover the bottom of the liquid outlet pipe 507 to keep the liquid outlet pipe 507 in a vertical state. When the waste liquid tank 206 needs to be replaced, 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 limit ring 504, and gradually move under the drive of the arc-shaped inner wall of the limit ring 504. Open, and make the top of the first rotating block 6042 and the second rotating block 6045 attract each other with the magnetic block 506, keep the bottom of the first rotating block 6042 and the second rotating block 6045 in an open state, make the second rotating block 6045 contact with the arc plate 6046, and push 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, make the sponge contact with the bottom of the liquid outlet pipe 507, make the sponge absorb the waste liquid remaining at the bottom of the liquid outlet pipe 507, avoid splashing of waste liquid, keep the liquid outlet pipe 507 in a vertical state, and inject the waste liquid directly into the waste liquid tank 206, avoid splashing of waste liquid, increase the difficulty of cleaning, and pollute the equipment.

[0045] The specific workflow is as follows:

[0046] When in use, the two groups of storage slots 201 are placed in the grooves surrounded by the blocks 106 on the surface of the turntable 105, and then the turntable 105 is manually rotated to rotate a group of collecting mechanisms 2 to the inside of the box body 101, so that the position of the fan-shaped holes 107 is aligned with the fixing plate 103, and then the sealing plate 7 is clamped on the turntable 105, so that the sealing plate 7 contacts the outer wall of the box body 101, and then the telescopic column 102 is extended upward, so that the fixing plate 103 lifts the storage slots 201 and moves upward, so that the storage slots 201 are separated from the turntable 105, and stop after reaching the position where the first air extraction hole 108 coincides with the second air extraction hole 202. In the process of driving the storage slots 201 to move upward, the frame 204 contacts the inner wall of the box body 101 and scratches the inner wall of the box body 101, so that the water vapor retained on the inner wall of the box body 101 is absorbed by the water-absorbent cloth on the surface of the frame 204, so as to keep the inner wall of the box body 101 clean.

[0047] After the collecting mechanism 2 is placed, the extraction columns 503 are installed one by one on the mounting block 502, and then the cover plate 501 is placed on the box body 101. After the storage tank 201 is placed, the second telescopic rod 601 is extended to move the fan-shaped 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 to keep the liquid outlet pipe 507 in a vertical state, and then injects the reagent into the extraction column 503, turns on the vacuum pump, and the waste liquid flows into the waste liquid tank 206 through the liquid outlet pipe 507. When the waste liquid is about to be filled, stop injecting the reagent, and the telescopic column 102 drives the fan-shaped 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. After the residual liquid at the bottom of the liquid outlet pipe 507 is cleaned, the collecting mechanism 2 is taken out and replaced.

[0048] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A solid phase extraction device for sample pretreatment, specifically comprising: The main body mechanism (1) is characterized in that: the inner wall of the main body mechanism (1) is symmetrically provided with a collecting mechanism (2), and the top of the main body mechanism (1) is provided with a mounting mechanism (5); The solid phase extraction device for sample pretreatment also includes: An auxiliary mechanism (6), the auxiliary mechanism (6) is used to ensure that the waste liquid can accurately flow into the collecting mechanism (2) during extraction, and the top of the auxiliary mechanism (6) is fixedly connected to the bottom of the mounting mechanism (5); The auxiliary mechanism (6) comprises a second telescopic rod (601), the top of the second telescopic rod (601) is fixedly connected to the bottom of the mounting mechanism (5), the bottom of the second telescopic rod (601) is fixedly connected to a fan-shaped plate (602), the surface of the fan-shaped plate (602) is evenly provided with circular holes (603), and the top of the fan-shaped plate (602) is evenly provided with a limit assembly (604).

2. The solid phase extraction device for sample pretreatment according to claim 1, characterized in that: The bottom of the mounting mechanism (5) is snap-fitted to the top of the main mechanism (1), the bottom of the collecting mechanism (2) is snap-fitted to the inner wall of the main mechanism (1), the outer wall of the main mechanism (1) is fixedly connected to a plug (3), and the end of the plug (3) away from the main mechanism (1) is fixedly connected to an exhaust pipe (4).

3. The solid phase extraction device for sample pretreatment according to claim 1, characterized in that: The main body mechanism (1) comprises a box body (101), a telescopic column (102) is fixedly connected to the bottom of the inner wall of the box body (101), a fixed plate (103) is fixedly connected to the top of the telescopic column (102), and a central axis (104) is rotatably connected to one end of the inner wall of the box body (101) away from the telescopic column (102).

4. The solid phase extraction device for sample pretreatment according to claim 3, characterized in that: A turntable (105) is fixedly connected to the outer wall of the central axis (104), a clamping block (106) is evenly arranged on the top of the turntable (105), the bottom of the clamping block (106) is fixedly connected to the top of the turntable (105), and 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 body (101), and a sealing plate (7) is symmetrically arranged on the outer wall of the box body (101), and the inner wall of the sealing plate (7) is clamped with the outer wall of the turntable (105).

5. The solid phase extraction device for sample pretreatment according to claim 4, characterized in that: The collecting mechanism (2) comprises a storage tank (201), the bottom of the storage tank (201) is snap-connected with the top of the rotating disk (105), the outer wall of the storage tank (201) is provided with a second air extraction hole (202), the inner wall of the storage tank (201) is evenly provided with a first telescopic rod (203), the bottom of the first telescopic rod (203) is fixedly connected with the bottom of the inner wall of the storage tank (201), the top of the first telescopic rod (203) is fixedly connected with a frame (204), the inner wall of the storage tank (201) is provided with a placing rack (205), the bottom of the placing rack (205) is in contact with the bottom of the inner wall of the storage tank (201), the inner wall of the placing rack (205) is evenly provided with a waste liquid tank (206), the outer wall of the waste liquid tank (206) is sleeved with the inner wall of the placing rack (205).

6. The solid phase extraction device for sample pretreatment according to claim 4, characterized in that: The mounting mechanism (5) comprises a cover plate (501), the top of the cover plate (501) being snap-fitted to the top of the box body (101), the top of the cover plate (501) being evenly provided with mounting blocks (502), the bottom of the mounting blocks (502) being fixedly connected to the bottom of the cover plate (501), the top of the mounting blocks (502) being provided with extraction columns (503), the bottom of the extraction columns (503) being sleeved to the inner wall of the mounting blocks (502).

7. The solid phase extraction device for sample pretreatment according to claim 6, characterized in that: A limiting ring (504) is evenly arranged at the bottom of the cover plate (501), the top of the limiting ring (504) is fixedly connected to the bottom of the cover plate (501), a fixing plug (505) is arranged inside the limiting ring (504), the top of the fixing plug (505) is fixedly connected to the bottom of the cover plate (501), a magnetic block (506) is symmetrically arranged on the outer wall of the fixing plug (505), the outer wall of the magnetic block (506) is fixedly connected to the outer wall of the fixing plug (505), and a liquid outlet pipe (507) is arranged on the inner wall of the fixing plug (505), and the outer wall of the liquid outlet pipe (507) is sleeved with the inner wall of the fixing plug (505).

8. The solid phase extraction device for sample pretreatment according to claim 1, characterized in that: The limiting assembly (604) comprises a fixing frame (6041), the bottom of which is fixedly connected to the top of the fan-shaped plate (602), and two fixing frames (6041) are symmetrically arranged, the inner wall of the fixing frame (6041) is rotatably connected to a first rotating block (6042), the bottom of the first rotating block (6042) is fixedly connected to an elastic ring (6043), the top of the elastic ring (6043) is fixedly connected to an end away from the first rotating block (6042) to a second rotating block (6045), and the outer wall of the second rotating block (6045) is rotatably connected to the inner wall of the fixing frame (6041).

9. The solid phase extraction device for sample pretreatment according to claim 8, characterized in that: The inner wall of the elastic ring (6043) is symmetrically provided with a limit block (6044), the outer wall of the limit block (6044) is fixedly connected to the inner wall of the elastic ring (6043), the inner wall of the limit block (6044) is sleeved with the outer wall of the liquid outlet pipe (507), and the bottom of the fan-shaped plate (602) is rotatably connected to a side close to the second rotating block (6045), and the inner wall of the arc plate (6046) is fixedly connected to a sponge block (6047).

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