A layered extraction centrifugal device and its application in extracting clethodim

Abstract

The present invention discloses a layered extraction centrifugal device and an extraction application for clethodim, which relates to the field of centrifugal devices, including a rotatable drum and a closed cover, a plurality of placement slots for placing sample containers are provided on the drum, the number of the placement slots is an even number and is distributed in a circular structure, a plurality of groups of detection components are provided on the closed cover, the detection components each include two detection units, the detection units in all the detection components correspond to the plurality of placement slots, and the two detection units in the detection components are symmetrical about the center of the circle of the circular structure. The sample containers placed in the placement slots are an even number and are placed symmetrically, so that the center of gravity of the sample containers on the drum is located at the center point of the drum, thereby preventing the drum from being damaged or making abnormal noises due to the center of gravity shift when the drum is rotating, ensuring the stability of the drum rotation, and preventing the sample in the sample container from splashing out and contaminating the drum and the closed cover during centrifugation, and also preventing the waste of samples.

Description

Technical Field

[0001] The invention relates to the field of centrifugal devices, and in particular to a layered extraction centrifugal device and its application in the extraction of clethodim. Background Art

[0002] Centrifugal layered extraction is a technique that uses centrifugal force to separate liquids of different densities. This technique is often used in biological and chemical experiments, such as separating different components in blood samples or extracting different types of pollutants in environmental science. The process of centrifugal layered extraction usually includes the following steps: Pour the liquid sample to be separated into a centrifuge tube, and then add the appropriate centrifuge solution; Place the centrifuge tube in a centrifuge. The centrifuge generates centrifugal force through high-speed rotation, which separates the different components in the liquid according to their density. The components with higher density will settle at the bottom of the centrifuge tube, and the components with lower density will remain at the top; After the centrifugation is completed, it can be clearly seen that the different components in the liquid have been separated into layers, and then the liquid in each layer can be taken out as needed.

[0003] Centrifuge uses centrifugal force to separate substances from a mixture. Its main structure includes motor drive system, refrigeration system, mechanical system, rotor and system control. The main function of the centrifuge is to separate substances. For example, in biological experiments, centrifuges can be used to separate cells, proteins and other biological molecules. In chemical experiments, centrifuges can be used to separate mixtures of different chemical components. The principle of the centrifuge is to use centrifugal force. When the centrifuge rotates, the sample in it will be subjected to an outward force, namely centrifugal force. The magnitude of this force is related to the rotation speed, sample mass and rotation radius. Under the action of centrifugal force, different components in the mixture will be separated according to their density, shape and size, thereby achieving sample purification and concentration.

[0004] Chinese patent CN108905299B discloses a blood extraction centrifuge and an extraction centrifugal method thereof, comprising an upper shell, a lower shell, a needle ejector, a blood collector, a needle ejector, a base, a centrifugal mechanism, a test tube, a needle loading gripper, a tube loading gripper, a tube unloading gripper, a test tube storage box and a waste blood collection box, wherein the needle ejector comprises an upper needle ejector shell, a lower needle ejector shell, a needle head, a needle pusher, a needle pusher frame and a needle ejector driving member; the blood collector comprises a needle insertion moving block, an upper tube clamping block, a lower tube clamping block, an upper tube clamping screw rod, a lower tube clamping screw rod, a blood collection tube, a blood collection electric push rod, a needle insertion moving screw rod, a first blood collection motor, a second blood collection motor and a third blood collection motor, which can transfer the blood in the blood collection tube into the test tube and complete the centrifugal stratification of the blood, thereby simplifying the blood collection process for medical staff;

[0005] Chinese patent CN116984127B discloses a Chinese medicine extraction centrifugal device, comprising a tank body, an automatic feeding mechanism for feeding and transporting medicinal materials and medicinal residues, a centrifugal mechanism for separating Chinese medicine liquid and medicinal residues, and an extraction mechanism for extracting the Chinese medicine liquid and medicinal residues separately. The centrifugal mechanism is installed inside the tank body, and the centrifugal mechanism can rotate inside the tank body. The automatic feeding mechanism and the extraction mechanism are movably installed on the centrifugal mechanism. Through the extraction mechanism movable on the centrifugal mechanism, the Chinese medicine liquid and the mixture of the liquid and medicinal residues in the centrifugal mechanism can be extracted separately during the rotation of the centrifugal mechanism, and the separation and extraction of the Chinese medicine liquid and the medicinal residue with a smaller volume can be realized; the automatic feeding mechanism is convenient for the feeding of raw materials, and can automatically transport the Chinese medicine materials and the medicinal residue with a larger volume when separating and extracting the mixed stock solution of the Chinese medicine materials and the liquid.

[0006] The above patents and prior art also have the following defects: when placing centrifuge tubes in the drum in the existing centrifuge, they need to be placed in an even number and balanced, and the centrifuge tubes need to be placed in positions symmetrical about the center of the drum so that the center of gravity of the centrifuge tubes on the drum is located at the center of gravity of the drum. When the centrifuge tubes on the drum are forgotten to be balanced, or the centrifuge tubes are placed in the wrong slots, the drum rotates at high speed. Due to the offset of the center of gravity, it is easy to cause damage to the drum and the driving parts, and the centrifuge makes abnormal noises. At the same time, when operating the centrifuge, it is easy to directly put the centrifuge tubes without a cover into the centrifuge for centrifugation, resulting in splashing of the samples in the centrifuge tubes during the centrifugation process, which not only wastes the samples, but also pollutes the centrifuge and causes trouble in cleaning.

[0007] Therefore, the present application provides a layered extraction centrifuge device and its application for the extraction of clethodim to meet the demand. Summary of the invention

[0008] The purpose of the present application is to provide a layered extraction centrifuge and an extraction application for sethoxydim, so that the sample containers placed in the placement groove are an even number and are placed symmetrically, so that the center of gravity of the sample containers on the drum is located at the center point of the drum, thereby preventing the drum from being damaged or making abnormal noises due to the shift of the center of gravity when the drum rotates, ensuring the stability of the rotation of the drum, and preventing the sample in the sample container from splashing out and contaminating the drum and the sealing cover during centrifugation, and also preventing sample waste.

[0009] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a layered extraction centrifuge and an extraction application for clethodim, comprising a rotatable drum and a closed cover, the drum being provided with a plurality of placement slots for placing sample containers, the number of the placement slots being an even number and being distributed in a circular structure, the closed cover being provided with a plurality of groups of detection assemblies, each of the detection assemblies comprising two detection units, the detection units in all the detection assemblies corresponding to the plurality of placement slots, and the two detection units in the detection assemblies being symmetrical about the center of the circular structure;

[0010] The detection unit comprises a tube detection block, a detection card block and a cover detection block; the detection card block can limit the tube detection block, and when the closing cover is located on the rotating drum, the cover body on the sample container in the placement slot can push the corresponding cover detection block to rise, and the cover detection block rises to move the detection card block to release the limit on the tube detection block and drive the tube detection block to rise;

[0011] The closure cover and the drum are connected together with a locking assembly, the locking assembly comprising a locking cover, the locking cover and the drum are both provided with mutually matching threads, when the covers of all sample containers in the drum push the corresponding tube detection blocks to rise, the locking cover can be rotated to lock the closure cover on the drum;

[0012] In the two detection units of the same detection assembly, one of the two corresponding placement slots has a sample container, and when its cover pushes the corresponding tube detection block to rise, the other tube detection block can be lowered, and the lowered tube detection block can block the rotation of the locking cover.

[0013] Preferably, the detection unit also includes a detection spring, a fixed cylinder and a connecting cylinder, the fixed cylinder is fixedly mounted on the closing cover, the bottom of the fixed cylinder is opened, one end of the detection spring is fixedly mounted on the inner cylinder top of the fixed cylinder, the connecting cylinder is fixedly mounted on the tube detection block, the other end of the detection spring is fixedly mounted on the connecting cylinder, the cover detection block passes through the tube detection block and slidably cooperates with the tube detection block, and the detection assembly also includes a connecting rope, the two ends of the connecting rope are respectively fixedly mounted on the top of the connecting cylinders in the two detection units.

[0014] Preferably, the detection unit also includes an unlocking block, a limit spring, a sliding rod and a moving block, the unlocking block is fixedly mounted on one side of the cover detection block close to the top, and the unlocking block is located above the tube detection block, the side wall of the connecting cylinder is provided with a connecting hole, the unlocking block is arranged in the connecting hole, a card block groove is arranged inside the fixed cylinder, the detection card block is located in the card block groove, the sliding rod is fixedly mounted in the card block groove, the moving block is fixedly mounted on the top of the detection card block, the moving block is sleeved on the sliding rod and slidably cooperates with the sliding rod, one end of the limit spring is fixedly mounted on a side groove wall of the card block groove away from the unlocking block, and the limit spring is sleeved on the sliding rod, and the other end of the limit spring is fixedly mounted on the moving block, the opposite ends of the detection card block and the unlocking block are inclined and cooperate with each other, and the bottom of the detection card block is against the tube detection block.

[0015] Preferably, the detection unit also includes a reset spring, a connecting plate and a blocking block, the connecting plate is fixedly mounted on the bottom of the cover detection block, one end of the reset spring is fixedly mounted on the tube detection block, and the other end of the reset spring is fixedly mounted on the connecting plate, a blocking groove is opened on the inner wall of the fixed cylinder, the blocking block is located in the blocking groove, and the blocking block is fixedly mounted on the side wall of the tube detection block, and the bottom of the blocking block is inclined.

[0016] Preferably, the locking assembly includes a rotating shell, a rotating plate and a plurality of rotating rods, the rotating shell is sleeved on the closing cover, the rotating plate is fixedly mounted on the bottom of the rotating shell, a plurality of rotating rods are equidistantly fixedly mounted on the rotating plate, and the rotating rods are located below the blocking block.

[0017] Preferably, the locking assembly also includes a rotating cylinder, a movable ring, a top support ring, a bottom support ring and a plurality of support rods, the top support ring and the bottom support ring are both fixedly mounted on the rotating shell, the rotating cylinder is fixedly mounted on the top support ring, the movable ring is fixedly mounted on the top of the locking cover, one ends of a plurality of the support rods are fixedly mounted on the top support ring, the bottoms of a plurality of the support rods are fixedly mounted on the bottom support ring, the support rods pass through the movable ring and slidably cooperate with the movable ring, and a plurality of anti-slip grooves are provided on the outer wall of the rotating cylinder.

[0018] Preferably, the detection component further comprises a convergence block, wherein the convergence block is fixedly mounted on the closing cover, wherein a plurality of convergence grooves are provided on the convergence block, and a plurality of the connecting ropes are arranged through the convergence grooves.

[0019] Preferably, the detection unit further comprises a pulley support frame and a pulley, the pulley support frame is fixedly mounted on the top of the fixed cylinder, and the pulley is rotatably connected to the pulley support frame.

[0020] Preferably, it also includes a centrifugal shell, a centrifugal chamber with a top opening is opened on the centrifugal shell, the drum is rotatably connected in the centrifugal chamber, a centrifugal motor is fixedly installed in the centrifugal shell, a driving pulley is fixedly installed on the output end of the centrifugal motor, a centrifugal rod is fixedly installed on the bottom of the drum, a passive pulley is fixedly installed on the centrifugal rod, a transmission belt is sleeved on the active pulley and the passive pulley, and a closing cover is rotatably connected to the centrifugal shell, and the closing cover corresponds to the centrifugal chamber.

[0021] Preferably, a fixed handle is fixedly installed on the closing cover, a micro switch is fixedly installed on the top of the rotating drum, the micro switch corresponds to the locking cover, the micro switch is electrically connected to the centrifugal motor, a plurality of positioning grooves are opened on the rotating drum, the plurality of positioning grooves correspond to the plurality of placement grooves, and a positioning rod is fixedly installed on the bottom of the closing cover corresponding to the positioning groove.

[0022] Application of a layered extraction centrifugal device in the extraction of clethodim.

[0023] In summary, the technical effects and advantages of the present invention are as follows:

[0024] 1. In the present invention, when the cover body is not installed on the sample container, the tube detection block is limited by the detection block and cannot rise, the tube detection block abuts against the sample container, the closing cover cannot continue to descend, and the locking cover cannot lock the closing cover, thereby preventing the sample container from not being installed with the cover body, and preventing the sample in the sample container from splashing out and contaminating the drum and the closing cover during centrifugation, and also preventing the waste of samples;

[0025] 2. In the present invention, a plurality of placement slots are distributed in a circular structure. When a placement slot has a sample container and a placement slot symmetrical to the circular structure does not have a sample container, the tube detection block corresponding to the placement slot without the sample container drops, which can block the rotation of the locking cover. The locking cover cannot lock the closing cover on the drum, so that the sample containers placed in the placement slots are even in number and symmetrically placed, so that the center of gravity of the sample containers on the drum is located at the center point of the drum, thereby preventing the drum from being damaged or making abnormal noises due to the shift of the center of gravity when the drum is rotating, and ensuring the stability of the drum rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the centrifugal housing, the closing cover and the sealing cover in the present invention;

[0028] Figure 2 It is a structural schematic diagram of the centrifugal motor, the centrifugal housing, the closing cover and the sealing cover in the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the centrifugal housing, the drum and the closing cover in the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the closing cover, the detection assembly, the locking assembly and the rotating drum in the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the closing cover, the locking cover, the rotating cylinder and the moving ring in the present invention;

[0032] Figure 6 It is a schematic diagram of the structure of the closing cover, the locking cover, the detection assembly, the rotating shell and the rotating cylinder in the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the detection unit, the connecting rope, the locking cover and the rotating cylinder in the present invention;

[0034] Figure 8 It is a schematic diagram of the structure of the closing cover, the locking cover, the rotating cylinder and the rotating shell in the present invention;

[0035] Fig. 9 For the present invention Figure 8 A magnified view of part A;

[0036] Fig.10 It is a schematic diagram of the structure of the fixed tube, the tube detection block and the connecting rope in the present invention;

[0037] Fig.11 For the present invention Fig.10 Enlarged view of part B.

[0038] In the figure: 1. rotating drum; 2. closing cover; 3. detection assembly; 30. detection unit; 311. tube detection block; 312. detection card block; 313. cover detection block; 314. detection spring; 315. fixing cylinder; 316. connecting cylinder; 317. unlocking block; 318. limiting spring; 319. reset spring; 320. blocking block; 321. gathering block; 322. pulley; 32. connecting rope; 4. locking assembly; 41. locking cover; 42. rotating shell; 43. rotating plate; 44. rotating rod; 45. rotating cylinder; 46. moving ring; 47. supporting rod; 5. centrifugal shell; 6. centrifugal motor; 7. closing cover; 8. fixing handle; 9. positioning rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example: Reference Figure 1-Figure 11 A layered extraction centrifugal device shown in the figure comprises a rotatable drum 1 and a closed cover 2, the drum 1 is provided with a plurality of placement slots for placing sample containers, the number of the placement slots is an even number and is distributed in a circular structure, the closed cover 2 is provided with a plurality of groups of detection components 3, each of the detection components 3 comprises two detection units 30, the detection units 30 in all the detection components 3 correspond to the plurality of placement slots, and the two detection units 30 in the detection components 3 are symmetrical about the center of the circular structure;

[0041] The detection unit 30 includes a tube detection block 311, a detection card block 312 and a cover detection block 313; the detection card block 312 can limit the tube detection block 311. When the closing cover 2 is located on the rotating drum 1, the cover body on the sample container in the placement slot can push the corresponding cover detection block 313 to rise. The cover detection block 313 rises to move the detection card block 312 to release the limit on the tube detection block 311, and then drive the tube detection block 311 to rise.

[0042] The closing cover 2 and the rotating drum 1 are connected together with a locking assembly 4, which includes a locking cover 41. The locking cover 41 and the rotating drum 1 are both provided with mutually matching threads. When the covers of all sample containers in the rotating drum 1 push the corresponding tube detection block 311 to rise, the locking cover 41 rotates to lock the closing cover 2 on the rotating drum 1.

[0043] In the two detection units 30 of the same detection assembly 3, one of the two corresponding placement slots has a sample container. When its cover pushes the corresponding tube detection block 311 to rise, the other tube detection block 311 can be lowered, and the lowered tube detection block 311 can block the rotation of the locking cover 41.

[0044] The sample container is placed in the placement slot, and the closing cover 2 is placed on the rotating drum 1 and pressed downward. When the sample container has no cover, the sample container is against the tube detection block 311, and the cover detection block 313 goes deep into the sample container. The tube detection block 311 is limited by the detection block 312 and cannot move upward, so that the closing cover 2 cannot continue to move downward, and the locking cover 41 cannot lock the closing cover 2 on the rotating drum 1, so as to prevent the sample container from forgetting to install the cover. When the sample container in the placement slot has a cover, the cover pushes the cover detection block 313 to rise. The rise of the cover detection block 313 first releases the limit of the tube detection block 311 by the detection block 312, and then the cover detection block 313 drives the tube detection block 311 to rise, so that the height of the closing cover 2 is reduced, and the locking cover 41 can be rotated to fit the thread on the rotating drum 1, and the sample container in the placement slot has a cover. The closing cover 2 is locked on the rotating drum 1. When there is a sample container in the placement groove corresponding to the two detection units 30 in the same detection component 3, and there is no sample container in the other placement groove, the cover of the sample container pushes the corresponding tube detection block 311 to rise. The rise of this tube detection block 311 can make the other tube detection block 311 in the same locking component 4 fall. The fallen tube detection block 311 can block the rotation of the locking cover 41, so that the locking cover 41 cannot rotate and lock the closing cover 2 on the rotating drum 1. When there are sample containers in the placement grooves corresponding to the two detection units 30 in the same detection component 3, the two sample containers push the two tube detection blocks 311 to rise synchronously, so that the tube detection blocks 311 will not fall, and the locking cover 41 can rotate to lock the closing cover 2 on the rotating drum 1.

[0045] When the cover body is not installed on the sample container, the tube detection block 311 is limited by the detection block 312 and cannot rise. The tube detection block 311 is against the sample container, the closing cover 2 cannot continue to descend, and the locking cover 41 cannot lock the closing cover 2, thereby preventing the sample container from not being installed with a cover body, which can prevent the sample in the sample container from splashing out and contaminating the drum 1 and the closing cover 2 during centrifugation, and can also prevent sample waste. Several placement slots are distributed in a circular structure. When there is a sample container in a placement slot, when the sample container is not placed in a placement slot symmetrical to the circular structure, the tube detection block 311 corresponding to the placement slot without the sample container drops, which can block the rotation of the locking cover 41. The locking cover 41 cannot lock the closing cover 2 on the drum 1, so that the sample containers placed in the placement slots are even and symmetrically placed, so that the center of gravity of the sample containers on the drum 1 is located at the center point of the drum 1, thereby preventing the drum 1 from being damaged or making abnormal noises due to the center of gravity shift when the drum 1 rotates, and ensuring the stability of the rotation of the drum 1.

[0046] Further, refer to Figure 1-Figure 11The detection unit 30 also includes a detection spring 314, a fixed cylinder 315 and a connecting cylinder 316. The fixed cylinder 315 is fixedly installed on the closed cover 2, and the bottom of the fixed cylinder 315 is opened. One end of the detection spring 314 is fixedly installed on the inner cylinder top of the fixed cylinder 315, and the connecting cylinder 316 is fixedly installed on the tube detection block 311. The other end of the detection spring 314 is fixedly installed on the connecting cylinder 316. The cover detection block 313 passes through the tube detection block 311 and slidably cooperates with the tube detection block 311. The detection component 3 also includes a connecting rope 32. The two ends of the connecting rope 32 are respectively fixedly installed on the top of the connecting cylinder 316 in the two detection units 30.

[0047] The two ends of the connecting rope 32 are fixedly mounted on the two connecting cylinders 316. The connecting rope 32 causes the detection springs 314 on the two connecting cylinders 316 to be in a state of storing force, and the force is not fully stored. When one of the tube detection blocks 311 in the same detection assembly 3 rises, the tube detection block 311 drives the connecting cylinder 316 to rise, and the connecting cylinder 316 squeezes the corresponding detection spring 314 to continue storing force and releases one end of the connecting rope 32. After one end of the connecting rope 32 is released, the other detection spring 314 is released and reset. The reset of the detection spring 314 pushes the other tube detection block 311 to descend, causing the tube detection block 311 to descend and block the rotation of the locking cover 41, so that the locking cover 41 cannot lock the closing cover 2 on the drum 1.

[0048] Further, refer to Figure 1-Figure 11 The detection unit 30 also includes an unlocking block 317, a limiting spring 318, a sliding rod and a moving block. The unlocking block 317 is fixedly mounted on one side of the cover detection block 313 near the top, and the unlocking block 317 is located above the tube detection block 311. A connecting hole is provided on the side wall of the connecting cylinder 316, and the unlocking block 317 is arranged in the connecting hole. A card block groove is provided inside the fixed cylinder 315, and the detection card block 312 is located in the card block groove. The sliding rod is fixedly mounted in the card block groove, and the moving block is fixedly mounted on the top of the detection card block 312. The moving block is sleeved on the sliding rod and slidably cooperates with the sliding rod. One end of the limiting spring 318 is fixedly mounted on a side groove wall of the card block groove away from the unlocking block 317, and the limiting spring 318 is sleeved on the sliding rod, and the other end of the limiting spring 318 is fixedly mounted on the moving block. The opposite ends of the detection card block 312 and the unlocking block 317 are inclined and cooperate with each other, and the bottom of the detection card block 312 is against the tube detection block 311.

[0049] The bottom of the detection block 312 abuts against the tube detection block 311, limiting the tube detection block 311 so that the tube detection block 311 cannot rise. When the closing cover 2 is placed on the drum 1, the cover body of the sample container pushes the cover detection block 313 to rise, and the cover detection block 313 drives the unlocking block 317 to rise. The unlocking block 317 pushes the detection block 312 to move horizontally through the inclined surface of the detection block 312, so that the bottom of the detection block 312 is disengaged from the tube detection block 311 and abuts against it. Then, the cover detection block 313 abuts against the connecting tube 316 and drives the connecting tube 316 to rise. The connecting tube 316 drives the tube detection block 311 to rise. During the rising process of the tube detection block 311, the inclined surface of the detection block 312 is released and the detection block 312 is continued to be pushed horizontally.

[0050] Further, refer to Figure 1-Figure 11 The detection unit 30 also includes a reset spring 319, a connecting plate and a blocking block 320. The connecting plate is fixedly mounted on the bottom of the cover detection block 313, one end of the reset spring 319 is fixedly mounted on the tube detection block 311, and the other end of the reset spring 319 is fixedly mounted on the connecting plate. A blocking groove is opened on the inner wall of the fixed cylinder 315, and the blocking block 320 is located in the blocking groove. The blocking block 320 is fixedly mounted on the side wall of the tube detection block 311, and the bottom of the blocking block 320 is inclined.

[0051] The cover of the sample container pushes the connecting plate to rise, and the connecting plate compresses the reset spring 319. When the closing cover 2 is removed from the drum 1, the connecting plate is separated from the cover of the sample container, and the reset spring 319 resets to drive the connecting plate and the cover detection block 313 to reset. When the tube detection block 311 descends, the tube detection block 311 drives the blocking block 320 to descend, and the blocking block 320 blocks the locking cover 41 from rotating.

[0052] Further, refer to Figure 1-Figure 11 The locking assembly 4 includes a rotating shell 42, a rotating plate 43 and a plurality of rotating rods 44. The rotating shell 42 is sleeved on the closing cover 2. The rotating plate 43 is fixedly mounted on the bottom of the rotating shell 42. A plurality of rotating rods 44 are equidistantly fixedly mounted on the rotating plate 43. The rotating rods 44 are located below the blocking block 320.

[0053] When the rotating shell 42 rotates, the rotating shell 42 drives the rotating plate 43 to rotate, and the rotating plate 43 drives the plurality of rotating rods 44 to rotate. When the blocking block 320 descends, the blocking block 320 is located between two adjacent rotating rods 44, so that the rotating rods 44 cannot rotate, and thus the rotating shell 42 cannot rotate.

[0054] Further, refer to Figure 1-Figure 11The locking assembly 4 also includes a rotating cylinder 45, a moving ring 46, a top support ring, a bottom support ring and a plurality of support rods 47. The top support ring and the bottom support ring are both fixedly mounted on the rotating shell 42. The rotating cylinder 45 is fixedly mounted on the top support ring. The moving ring 46 is fixedly mounted on the top of the locking cover 41. One end of a plurality of support rods 47 is fixedly mounted on the top support ring. The bottoms of a plurality of support rods 47 are fixedly mounted on the bottom support ring. The support rods 47 penetrate the moving ring 46 and slide with the moving ring 46. A plurality of anti-slip grooves are provided on the outer wall of the rotating cylinder 45.

[0055] The operating rotating cylinder 45 rotates, the rotating cylinder 45 drives the top support ring and the bottom support ring to rotate, the top support ring and the bottom support ring drive the support rod 47 to rotate, the support rod 47 drives the moving ring 46 to rotate, the moving ring 46 drives the locking cover 41 to rotate, the locking cover 41 located on the rotating drum 1 rotates and cooperates with the rotating drum 1 thread, the locking cover 41 moves downward while rotating on the rotating drum 1, the locking cover 41 drives the moving ring 46 to move downward, the moving ring 46 moves downward on the support rod 47 until the locking cover 41 is locked on the rotating drum 1.

[0056] Further, refer to Figure 1-Figure 11 The detection component 3 also includes a convergence block 321, which is fixedly mounted on the closing cover 2. The convergence block 321 is provided with a plurality of convergence grooves, and a plurality of connecting ropes 32 are arranged through the convergence grooves.

[0057] The tightening block 321 can guide and tighten the connecting rope 32 .

[0058] Further, refer to Figure 1-Figure 11 The detection unit 30 also includes a pulley support frame and a pulley 322. The pulley support frame is fixedly installed on the top of the fixed cylinder 315, and the pulley 322 is rotatably connected to the pulley support frame.

[0059] The pulley 322 can change the direction of the connecting rope 32 , and the friction between the connecting rope 32 and the pulley 322 is lower, so that the wear of the connecting rope 32 is less.

[0060] Further, refer to Figure 1-Figure 11 , further comprising a centrifugal shell 5, a centrifugal chamber with a top opening is formed on the centrifugal shell 5, a drum 1 is rotatably connected in the centrifugal chamber, a centrifugal motor 6 is fixedly installed in the centrifugal shell 5, a driving pulley is fixedly installed at the output end of the centrifugal motor 6, a centrifugal rod is fixedly installed at the bottom of the drum 1, a passive pulley is fixedly installed on the centrifugal rod, a transmission belt is sleeved on the active pulley and the passive pulley, a closing cover 7 is rotatably connected to the centrifugal shell 5, and the closing cover 7 corresponds to the centrifugal chamber.

[0061] The centrifugal motor 6 drives the active pulley to rotate, the active pulley drives the transmission belt to rotate, the transmission belt rotates the passive pulley, the passive pulley drives the centrifugal rod to rotate, the centrifugal rod drives the drum 1 to rotate, the drum 1 drives the sample container to rotate, so that the sample in the sample container is centrifugally layered.

[0062] Further, refer to Figure 1-Figure 11 A fixed handle 8 is fixedly installed on the closing cover 2, a micro switch is fixedly installed on the top of the drum 1, the micro switch corresponds to the locking cover 41, the micro switch is electrically connected to the centrifugal motor 6, a plurality of positioning grooves are opened on the drum 1, the plurality of positioning grooves correspond to the plurality of placement grooves, and a positioning rod 9 is fixedly installed on the bottom of the closing cover 2 corresponding to the positioning groove.

[0063] The fixed handle 8 is convenient for taking the closing cover 2. When the closing cover 2 is locked on the drum 1 and is in the locked position, the closing cover 2 can press the micro switch, and the micro switch starts the centrifugal motor 6. The centrifugal motor 6 drives the drum 1 to rotate, and the rotation direction of the drum 1 is opposite to the rotation direction of the locking cover 41 locked on the drum 1. When the closing cover 2 is located on the drum 1, the positioning rod 9 is inserted in the positioning groove, so that the closing cover 2 will not rotate relative to the drum 1.

[0064] The cover body is threadedly fitted on the top of the sample container. The sample container is preferably a centrifuge tube in the prior art, and the cover body is preferably a centrifuge tube cover in the prior art.

[0065] Application of a layered extraction centrifugal device in the extraction of clethodim.

[0066] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A layered extraction centrifugal device, comprising a rotatable drum (1) and a sealing cover (2), characterized in that: The rotating drum (1) is provided with a plurality of placement slots for placing sample containers, the number of the placement slots is an even number and they are distributed in a circular structure, the closing cover (2) is provided with a plurality of groups of detection components (3), each of the detection components (3) comprises two detection units (30), the detection units (30) in all the detection components (3) correspond to the plurality of placement slots, and the two detection units (30) in the detection components (3) are symmetrical about the center of the circular structure; The detection unit (30) comprises a tube detection block (311), a detection card block (312) and a cover detection block (313); the detection card block (312) can limit the tube detection block (311); when the closing cover (2) is located on the rotating drum (1), the cover body on the sample container in the placement slot can push the corresponding cover detection block (313) to rise; the cover detection block (313) rises to move the detection card block (312) to release the limit on the tube detection block (311), and then drive the tube detection block (311) to rise; The closing cover (2) and the rotating drum (1) are jointly connected with a locking assembly (4), the locking assembly (4) comprising a locking cover (41), the locking cover (41) and the rotating drum (1) being provided with mutually matching threads, and when the covers of all sample containers in the rotating drum (1) push the corresponding tube detection block (311) to rise, the locking cover (41) can be rotated to lock the closing cover (2) on the rotating drum (1); In the two detection units (30) of the same detection assembly (3), one of the two corresponding placement slots has a sample container, and when its cover pushes the corresponding tube detection block (311) to rise, the other tube detection block (311) can be lowered, and the lowered tube detection block (311) can block the rotation of the locking cover (41); The detection unit (30) further comprises a detection spring (314), a fixing cylinder (315) and a connecting cylinder (316); the fixing cylinder (315) is fixedly mounted on the closing cover (2); the bottom of the fixing cylinder (315) is open; one end of the detection spring (314) is fixedly mounted on the inner cylinder top of the fixing cylinder (315); the connecting cylinder (316) is fixedly mounted on the tube detection block (311); the other end of the detection spring (314) is fixedly mounted on the connecting cylinder (316); the cover detection block (313) passes through the tube detection block (311) and is slidably matched with the tube detection block (311); the detection assembly (3) further comprises a connecting rope (32); the two ends of the connecting rope (32) are respectively fixedly mounted on the top of the connecting cylinders (316) in the two detection units (30); The detection unit (30) further comprises an unlocking block (317), a limit spring (318), a sliding rod and a moving block. The unlocking block (317) is fixedly mounted on a side of the cover detection block (313) close to the top, and the unlocking block (317) is located above the tube detection block (311). A connecting hole is provided on the side wall of the connecting cylinder (316), and the unlocking block (317) is arranged in the connecting hole. A card block groove is provided inside the fixed cylinder (315), and the detection card block (312) is located in the card block groove. The sliding rod is fixedly mounted in the card block groove. The moving block The block is fixedly mounted on the top of the detection block (312), the moving block is sleeved on the sliding rod and slidably cooperates with the sliding rod, one end of the limit spring (318) is fixedly mounted on a side groove wall of the block groove away from the unlocking block (317), and the limit spring (318) is sleeved on the sliding rod, and the other end of the limit spring (318) is fixedly mounted on the moving block, the opposite ends of the detection block (312) and the unlocking block (317) are inclined and cooperate with each other, and the bottom of the detection block (312) is against the tube detection block (311); The detection unit (30) further comprises a return spring (319), a connecting plate and a blocking block (320); the connecting plate is fixedly mounted on the bottom of the cover detection block (313); one end of the return spring (319) is fixedly mounted on the tube detection block (311); the other end of the return spring (319) is fixedly mounted on the connecting plate; a blocking groove is formed on the inner wall of the fixed cylinder (315); the blocking block (320) is located in the blocking groove; and the blocking block (320) is fixedly mounted on the side wall of the tube detection block (311); the bottom of the blocking block (320) is inclined; The locking assembly (4) comprises a rotating shell (42), a rotating plate (43) and a plurality of rotating rods (44); the rotating shell (42) is sleeved on the closing cover (2); the rotating plate (43) is fixedly mounted on the bottom of the rotating shell (42); a plurality of rotating rods (44) are fixedly mounted on the rotating plate (43) at equal distances; and the rotating rods (44) are located below the blocking block (320).

2. A stratified extraction centrifugal device according to claim 1, characterized in that: The locking assembly (4) further comprises a rotating cylinder (45), a moving ring (46), a top support ring, a bottom support ring and a plurality of support rods (47); the top support ring and the bottom support ring are both fixedly mounted on the rotating shell (42); the rotating cylinder (45) is fixedly mounted on the top support ring; the moving ring (46) is fixedly mounted on the top of the locking cover (41); one end of a plurality of the support rods (47) is fixedly mounted on the top support ring; the bottoms of a plurality of the support rods (47) are fixedly mounted on the bottom support ring; the support rods (47) penetrate the moving ring (46) and are slidably matched with the moving ring (46); and a plurality of anti-slip grooves are provided on the outer wall of the rotating cylinder (45).

3. A stratified extraction centrifugal device according to claim 1, characterized in that: The detection assembly (3) further comprises a convergence block (321), wherein the convergence block (321) is fixedly mounted on the closing cover (2), wherein a plurality of convergence grooves are formed on the convergence block (321), and a plurality of connecting ropes (32) are arranged through the convergence grooves; the detection unit (30) further comprises a pulley support frame and a pulley (322), wherein the pulley support frame is fixedly mounted on the top of the fixing cylinder (315), and the pulley (322) is rotatably connected to the pulley support frame.

4. A stratified extraction centrifugal device according to claim 1, characterized in that: The centrifugal machine also comprises a centrifugal housing (5), wherein a centrifugal chamber with a top opening is formed on the centrifugal housing (5), the drum (1) is rotatably connected in the centrifugal chamber, a centrifugal motor (6) is fixedly mounted in the centrifugal housing (5), a driving pulley is fixedly mounted on the output end of the centrifugal motor (6), a centrifugal rod is fixedly mounted on the bottom of the drum (1), a driven pulley is fixedly mounted on the centrifugal rod, a transmission belt is sleeved on the driving pulley and the driven pulley, and a closing cover (7) is rotatably connected to the centrifugal housing (5), the closing cover (7) corresponds to the centrifugal chamber.

5. A stratified extraction centrifugal device according to claim 4, characterized in that: A fixed handle (8) is fixedly mounted on the closing cover (2), a micro switch is fixedly mounted on the top of the rotating drum (1), the micro switch corresponds to the locking cover (41), the micro switch is electrically connected to the centrifugal motor (6), a plurality of positioning grooves are provided on the rotating drum (1), the plurality of positioning grooves correspond to the plurality of placement grooves, and a positioning rod (9) is fixedly mounted on the bottom of the closing cover (2) corresponding to the positioning grooves.

6. Use of the layered extraction centrifuge according to any one of claims 1 to 5 in the extraction of clethodim.

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