A pretreatment device for fruit and vegetable detection

Abstract

The utility model discloses a kind of pretreatment devices for fruit and vegetable detection, including pipe body;The pipe body bottom is equipped with connecting portion, the connecting portion includes connecting block, the connecting block is cylindrical, and connecting block is connected with pipe body, and the connecting block top circumferential array is equipped with first through-hole and is penetrated;Rotary groove is opened in the connecting block, sealing disc is rotatably arranged in the rotary groove, and the sealing disc is equipped with second through-hole corresponding with first through-hole;Connecting block side surface is equipped with sliding slot, and the sliding slot is communicated with rotary groove, sliding block is equipped in the sliding slot, and one end of the sliding block is connected with the side surface of sealing disc;The bottom of connecting block is detachably equipped with sample tube.The utility model does not need to open test tube sealing plug manually, and the supernatant of first time is transferred to another test tube, and the supernatant of first time and fruit and vegetable residue can be quickly separated by sealing disc rotation, and test tube is not occupied more, and the device is simple to operate, convenient and fast.

Description

Technical Field

[0001] This utility model belongs to the field of fruit and vegetable testing technology, and in particular relates to a pretreatment device for fruit and vegetable testing. Background Technology

[0002] In the current process for detecting pesticide residues in fruits and vegetables, the fruits and vegetables must first be chopped and sampled. Then, an appropriate amount of sample is placed in a test tube, and solvents such as acetonitrile and sodium chloride are added for extraction. After mixing, the sample is centrifuged for the first time to ensure the fruit and vegetable components are fully integrated with the solvent. After the first centrifugation, the supernatant is manually transferred to another test tube using a pipette to separate the fruit and vegetable residues. The supernatant in the new test tube is then centrifuged again for concentration. Finally, the processed supernatant is sent to the detection equipment for analysis. However, this process has significant drawbacks: the separation of the supernatant after the first centrifugation relies entirely on manual operation. This requires not only manually aspirating and transferring the liquid but also frequently opening and closing the test tube stopper. The process is not only cumbersome and time-consuming but also significantly increases labor costs. Utility Model Content

[0003] Based on the above background, the purpose of this utility model is to provide a pretreatment device for fruit and vegetable testing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pretreatment device for fruit and vegetable testing includes a tube body; the bottom of the tube body is provided with a connecting part, the connecting part includes a connecting block, the connecting block is cylindrical and connected to the tube body, and the top of the connecting block is provided with a first through hole in a circular array; a rotating groove is provided inside the connecting block, a sealing disc is rotatably provided in the rotating groove, and a second through hole is provided on the sealing disc corresponding to the first through hole;

[0006] The connecting block has a sliding groove on its side, which is connected to the rotating groove. A slider is provided in the sliding groove, and one end of the slider is connected to the side of the sealing disc.

[0007] The bottom of the connecting block is detachably equipped with a sample tube.

[0008] Using the above technical solution, chopped fruits and vegetables are placed in a sample tube, which is then connected to the bottom of the connecting block. After injecting the required solvent from the top of the tube, the tube is placed in a centrifuge for the first centrifugation. After the first centrifugation, the tube is removed, and the slider is moved to rotate the sealing plate, closing the sealing plate against the first through hole, thus isolating the supernatant from the fruit and vegetable residue at the bottom. At this point, the sample tube can be detached or not. The tube is then placed in the centrifuge for the second centrifugation. There is no need to manually open the test tube seal to transfer the first supernatant to another test tube. This allows for rapid separation of the first supernatant from the fruit and vegetable residue without occupying multiple test tubes. The device is simple, convenient, and quick to operate.

[0009] Furthermore, the bottom of the connecting block is provided with an installation groove, the inner sidewall of the installation groove is provided with threads, and the upper end of the outer sidewall of the sample tube is provided with threads;

[0010] The connecting block is detachably connected to the sample tube via threads.

[0011] Furthermore, the sealing disc is provided with a plurality of sealing blocks, which are arranged in a circumferential array on the top of the sealing disc and are intersected with the second through hole.

[0012] Furthermore, the sealing block is made of silicone.

[0013] Furthermore, the cross-section of the sealing block is arc-shaped.

[0014] With the above technical solution, after the sealing disc is rotated, the sealing block can better seal the first through hole.

[0015] Furthermore, a locking block is rotatably provided at one end of the slider that extends out of the groove, and the locking block has an insertion hole;

[0016] The connecting block is provided with locking pins on its side, and the locking pins are symmetrically arranged below both ends of the slide groove;

[0017] The locking pin is inserted into the corresponding socket;

[0018] The locking pin is provided with a protrusion.

[0019] Furthermore, the number of the sockets is not less than two;

[0020] The number of protrusions on the locking pin shall not be less than two;

[0021] The diameter of the protrusion is greater than the diameter of the socket.

[0022] Furthermore, the protrusion is spherical.

[0023] With the above technical solution, after the sealing disc is rotated to the corresponding position, the locking block is rotated to correspond with the locking post, so that the insertion hole is inserted into the locking post. The spherical structure of the protrusion makes it easier for the insertion hole to pass through, thereby limiting and locking the locking block with the protrusion, and preventing the sealing disc from rotating during centrifugation.

[0024] Furthermore, a sealing plug is detachably inserted into the top of the tube.

[0025] This utility model has the following beneficial effects:

[0026] 1. Place the chopped fruits and vegetables into the sample tube, then connect the sample tube to the bottom of the connecting block. After injecting the required solvent from the top of the tube, place the tube into the centrifuge for the first centrifugation. After the first centrifugation, remove the tube and rotate the slider to close the sealing plate, thus isolating the supernatant from the fruit and vegetable residue at the bottom. At this point, the sample tube can be detached or not. Then, place the tube into the centrifuge for the second centrifugation. There is no need to manually open the test tube seal. Transfer the supernatant from the first centrifugation to another test tube. This allows for rapid separation of the first supernatant from the fruit and vegetable residue without occupying multiple test tubes. The device is simple, convenient, and quick to operate.

[0027] 2. After rotating the sealing disc to the corresponding position, rotate the locking block to correspond with the locking post, so that the insertion hole is inserted into the locking post. The spherical structure of the protrusion makes it easier for the insertion hole to pass through, thereby limiting and locking the locking block with the protrusion to prevent the sealing disc from rotating during centrifugation. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0030] Figure 2 For the present utility model Figure 1 A magnified structural diagram at point A;

[0031] Figure 3 This is a cross-sectional three-dimensional structural diagram of the connecting block of this utility model;

[0032] Figure 4 This is a three-dimensional structural diagram of the sealing disc of this utility model;

[0033] Figure 5 For the present utility model Figure 4 A magnified structural diagram at point B.

[0034] Among them: 1. Pipe body; 11. Sealing plug;

[0035] 1. Connecting part; 2. Connecting block; 21. First through hole; 22. Rotating groove; 23. Sealing plate; 24. Second through hole; 25. Sliding groove; 26. Sliding block; 27. Mounting groove; 28. Sealing block;

[0036] 3. Sample tubes;

[0037] 4. Lock block; 41. Socket; 42. Lock pin; 43. Protrusion. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0041] like Figure 1-5As shown, a pretreatment device for fruit and vegetable testing includes a tube body 1. Both the upper and lower ends of the tube body 1 are open. A connecting portion is provided at the bottom of the tube body 1, including a connecting block 2. The connecting block 2 is cylindrical and fixedly connected to the bottom of the tube body 1. A first through hole 21 is provided in a circumferential array at the top of the connecting block 2. The first through hole 21 facilitates the entry of solvent into the sample tube 3 at the bottom. A rotating groove 22 is provided inside the connecting block 2, and a sealing disk 23 is rotatably mounted within the rotating groove 22. The sealing disk 23 has a connection to the first through hole 21. The corresponding second through hole 24; the side of the connecting block 2 is provided with a sliding groove 25, which is connected to the rotating groove 22. A slider 26 is provided in the sliding groove 25, and one end of the slider 26 is connected to the side of the sealing plate 23; the bottom of the connecting block 2 is detachably provided with a sample tube 3. Furthermore, the bottom of the connecting block 2 is provided with an installation groove 27, the inner side wall of the installation groove 27 is provided with threads, and the upper end of the outer side wall of the sample tube 3 is provided with threads; the connecting block 2 and the sample tube 3 are detachably connected by threads; a sealing plug 11 is detachably inserted into the top of the tube body 1 to prevent dust from entering.

[0042] By moving the slider 26, the sealing disc 23 has two states. When the sealing disc 23 rotates to the point where the second through hole 24 corresponds to the second through hole 24 and is concentric, the sealing disc 23 is in the open state. At this time, the tube body 1 is connected to the sample tube 3. During the first centrifugation operation, the solvent can enter the sample tube 3 through the first through hole 21 and the second through hole 24 to effectively dissolve and extract the chopped fruits and vegetables. After the first centrifugation is completed, the slider 26 is rotated to displace the second through hole 24 from the first through hole 21. At this time, the sealing block 28 closes the channel of the first through hole 21, and the sealing disc 23 is in a sealed state. At this time, the supernatant in the tube body 1 that has been extracted by the first centrifugation can be extracted by a second centrifugation.

[0043] Furthermore, the sealing disc 23 is provided with multiple sealing blocks 28. The sealing blocks 28 are arranged in a circumferential array on the top of the sealing disc 23 and are intersected with the second through hole 24. The sealing blocks 28 are made of silicone or rubber. The cross section of the sealing blocks 28 is arc-shaped. The sealing blocks 28 themselves have a certain elasticity and arc-shaped structure. When rotated to the sealing state, they can better seal the first through hole 21.

[0044] Furthermore, a locking block 4 is rotatably provided at one end of the slider 26 extending from the slide groove 25, and an insertion hole 41 is provided on the locking block 4; a locking post 42 is provided on the side of the connecting block 2, and the locking post 42 is symmetrically arranged below both ends of the slide groove 25; the locking post 42 is inserted into the insertion hole 41; the locking post 42 is provided with a protrusion 43, and there are no less than two insertion holes 41 and no less than two protrusions 43 on the locking post 42. The diameter of the protrusion 43 is larger than the diameter of the insertion hole 41. The protrusion 43 is spherical, and its diameter is slightly larger than the diameter of the insertion hole 41. When the insertion hole 41 is inserted into the locking post 42, when passing through the protrusion 43, the material of the locking block 4 and the locking post 42 itself has a certain elasticity, which allows the insertion hole 41 to pass through the side of the protrusion 43 to better fix the locking block 4. The number of no less than two protrusions 43 and the number of insertion holes 41 can avoid repeated use and reduce the sealing effect of the locking block 4 and the locking post 42, thereby better locking the sealing disc 23.

[0045] The working principle of this utility model is as follows: Chopped fruits and vegetables are placed into sample tube 3, and then sample tube 3 is threaded into the mounting groove 27 at the bottom of connecting block 2, so that the second through hole 24 of sealing plate 23 and the first through hole 21 are concentric. After injecting the required solvent from the top of tube body 1, the sealing plug 11 is inserted into the top of tube body 1, and then tube body 1 is placed into the centrifuge chamber of centrifuge equipment to fix it in place. Then, the centrifuge equipment is started to perform the first centrifugation operation on the sample in tube body 1. After the operation is completed, tube body 1 is removed and transferred... After the moving locking block 4 disengages the insertion hole 41 from the locking pin 42, it slides and rotates until the sealing block 28 is located in the first through hole 21, sealing the first through hole 21. Then, the insertion hole 41 is inserted into the locking pin 42 to fix the position of the sealing plate 23. The tube body 1 is placed into the equipment for the second centrifugation operation. There is no need to manually open the test tube sealing plug 11 to transfer the first supernatant to another test tube. The first supernatant and fruit and vegetable residue can be quickly separated without occupying more test tubes. The device is simple, convenient and quick to operate.

[0046] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A pretreatment device for fruit and vegetable testing, comprising a tube body (1), characterized in that: The bottom of the tube body (1) is provided with a connecting part, the connecting part includes a connecting block (2), the connecting block (2) is cylindrical and connected to the tube body (1), and the top of the connecting block (2) is provided with a first through hole (21) through a circular array; the connecting block (2) is provided with a rotating groove (22) inside, and a sealing disk (23) is rotatably provided in the rotating groove (22), and the sealing disk (23) is provided with a second through hole (24) corresponding to the first through hole (21); The connecting block (2) has a sliding groove (25) on its side, which is connected to the rotating groove (22). A slider (26) is provided in the sliding groove (25), and one end of the slider (26) is connected to the side of the sealing disc (23). The bottom of the connecting block (2) is detachably equipped with a sample tube (3).

2. The pretreatment device for fruit and vegetable testing according to claim 1, characterized in that: The bottom of the connecting block (2) is provided with an installation groove (27), the inner side wall of the installation groove (27) is provided with threads, and the upper end of the outer side wall of the sample tube (3) is provided with threads; The connecting block (2) is detachably connected to the sample tube (3) via threads.

3. The pretreatment device for fruit and vegetable testing according to claim 1, characterized in that: The sealing disk (23) is provided with a plurality of sealing blocks (28), which are arranged in a circumferential array on the top of the sealing disk (23) and are arranged intersecting with the second through hole (24).

4. The pretreatment device for fruit and vegetable testing according to claim 3, characterized in that: The sealing block (28) has an arc-shaped cross-section.

5. The pretreatment device for fruit and vegetable testing according to claim 4, characterized in that: The sealing block (28) is made of silicone.

6. The pretreatment device for fruit and vegetable testing according to claim 1, characterized in that: The slider (26) has a locking block (4) rotatably provided at one end extending from the slide groove (25), and the locking block (4) has an insertion hole (41); The connecting block (2) is provided with a locking post (42) on its side, and the locking post (42) is symmetrically arranged below both ends of the slide groove (25); The locking pin (42) is inserted into the corresponding socket (41); The locking pin (42) is provided with a protrusion (43).

7. The pretreatment device for fruit and vegetable testing according to claim 6, characterized in that: The protrusion (43) is spherical.

8. The pretreatment apparatus for fruit and vegetable testing according to any one of claims 1-7, characterized in that: A sealing plug (11) is detachably inserted into the top of the tube (1).

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