Ultrasonic extraction workstation capable of automatically adding liquid

Abstract

An ultrasonic extraction workstation capable of automatically adding liquid relates to the field of ultrasonic extraction detection equipment and comprises a sample bottle management module, a sample bottle transfer module, a solvent injection module, an ultrasonic extraction module, a first transfer mechanism and a second transfer mechanism, the first transfer mechanism can transfer the sample bottle from the sample bottle management module to the sample bottle transfer module or transfer the sample bottle from the solvent injection module to the ultrasonic extraction module; and the second transfer mechanism is arranged between the sample bottle in-loading module and the solvent injection module and is used for transferring the sample bottle of which the bottle cap is opened to the solvent injection module from the sample bottle in-loading module. Automatic transfer of the sample discs among the modules is achieved through the first transfer mechanism and the second transfer mechanism, an operator does not need to frequently repeat the same operation, the operator only needs to take the sample bottles subjected to ultrasonic extraction out of the equipment, labor force is saved, and working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to ultrasonic extraction detection equipment field, concretely is a kind of ultrasonic extraction workstation of automatic liquid feeding. BACKGROUND

[0002] With the development of science and technology and the growth of consumer demand for healthy products, the harmful substance content in consumer goods has become a problem that consumers care more and more about, and many enterprises are gradually incorporating harmful substance detection into product internal control.In recent years, ultrasonic technology has been gradually applied to the extraction process of various harmful substances due to its unique physical and chemical effects.The cavitation phenomenon produced under the action of ultrasonic waves can produce instantaneous high pressure, making harmful substances in the sample more easily released into the extraction medium, thereby improving extraction efficiency and shortening processing time.

[0003] However, the ultrasonic extraction device on the market currently needs to be placed manually by the operator or needs to be manually unscrewed or tightened to add liquid, which requires a lot of repetitive labor from the operator, is extremely inconvenient and has low work efficiency, and needs to be improved. INVENTION CONTENTS

[0004] The utility model aims at overcoming the shortcomings of prior art, and provides an ultrasonic extraction workstation capable of automatic liquid feeding.

[0005] The utility model adopts the following technical solutions:

[0006] An ultrasonic extraction workstation capable of automatic liquid feeding includes a sample bottle management module, a sample bottle transfer module, a solvent injection module, an ultrasonic extraction module, a first transfer mechanism and a second transfer mechanism,

[0007] The sample bottle management module is used to place sample bottles to be fed with liquid or that have been subjected to ultrasonic extraction in batches.

[0008] The sample bottle transfer module is used to place sample bottles with opened bottle caps.

[0009] The solvent injection module can inject solvent into sample bottles with opened bottle caps.

[0010] The ultrasonic extraction module is used to place sample bottles that have been fed with liquid and perform ultrasonic extraction on them.

[0011] The first transfer mechanism can transfer the sample bottle from the sample bottle management module to the sample bottle intermediate module or from the solvent injection module to the ultrasonic extraction module, comprising a three-axis linear module, a sample bottle clamp, a bottle cap clamp and a cap screwing driving assembly, the three-axis linear module is arranged above each module; the sample bottle clamp is arranged on the three-axis linear module and can move along three axes, and can be sleeved and clamped on the outside of the sample bottle; the bottle cap clamp is rotatably arranged in the sample bottle clamp and can clamp the bottle cap when the sample bottle clamp clamps the sample bottle; the cap screwing driving assembly is connected with the bottle cap clamp and drives the bottle cap clamp to rotate to unscrew or screw the bottle cap;

[0012] The second transfer mechanism is arranged between the sample bottle loading module and the solvent injection module and transfers the sample bottle with the opened bottle cap from the sample bottle loading module to the solvent injection module.

[0013] Preferably, the sample bottle clamp comprises a base plate, a fixed jaw, a movable jaw and a clamping cylinder, the base plate can move to above the sample bottle with the three-axis linear module; the fixed jaw is downwardly extended from one side of the base plate and can be in contact with the side surface of the sample bottle body; the movable jaw is opposite to the fixed jaw and is movably arranged on the base plate; the clamping cylinder is arranged on the base plate and connected with the movable jaw, and drives the movable jaw to move away from or close to the fixed jaw to release or clamp the sample bottle.

[0014] Preferably, the bottle cap clamp is rotatably arranged below the base plate and comprises a top plate in contact with the top surface of the bottle cap and a plurality of elastic clamps downwardly extended from the side surface of the top plate.

[0015] Preferably, the cap screwing driving assembly comprises a driven gear, a driving gear and a driving motor, the driven gear is rotatably arranged below the base plate, the top plate is connected with the driven gear and can rotate with the driven gear; the driving gear is meshed with the driven gear; the driving motor is connected with the driving gear and drives the driving gear to rotate to drive the bottle cap clamp to rotate to unscrew or screw the bottle cap.

[0016] Preferably, the sample bottle clamp and the bottle cap clamp are arranged in two pairs, the two base plates are connected with each other, and the first transfer mechanism further comprises a clamp rotating assembly arranged at the connection of the two base plates to rotate the two sample bottle clamps and the two bottle cap clamps between the working station and the standby station.

[0017] Preferably, the sample bottle loading module and the solvent injection module are the same distance from the second transfer mechanism, the second transfer mechanism comprises a rotating arm, an electric clamp and a lifting assembly, the rotating arm is rotatably arranged; the electric clamp is arranged on the rotating arm and can rotate with the rotating arm to be opposite to the sample bottle loading module and the solvent injection module respectively; the lifting assembly is connected with the rotating arm and can drive the rotating arm to lift to pick up the sample bottle at the sample bottle loading module or to put down the sample bottle at the solvent injection module.

[0018] Preferably, the sample bottle management module and the matrix array on the ultrasonic extraction module are provided with a plurality of placement slots for placing the sample bottles to be added with liquid, and the distance between the two sample bottle clamps is equal to the distance between the two adjacent placement slots.

[0019] Preferably, the solvent injection module comprises an injection slot for placing the sample bottle after the bottle cap is opened, and a liquid outlet opposite to the injection slot and connected with an external liquid supply device.

[0020] Preferably, the ultrasonic extraction module further comprises a tray type ultrasonic vibrator capable of applying ultrasonic waves to the sample bottle for extraction.

[0021] Preferably, the bottom of the placement slot is shaped with a special-shaped protrusion for limiting the rotation of the sample bottle, and the sample bottle is shaped with a special-shaped slot matched with the special-shaped protrusion.

[0022] From the above description of the present application, compared with the prior art, the beneficial effects of the present application are as follows: the first transfer mechanism and the second transfer mechanism realize the automatic transfer of the sample disc between the modules, the bottle cap clamp holds the bottle cap, and the bottle cap can be automatically opened or tightened by rotating, and the liquid can be automatically added after the bottle cap is opened, without the need for the operator to repeatedly perform the same operation frequently, the operator only needs to take out the sample bottle after ultrasonic extraction from the equipment, which saves labor and improves work efficiency.

[0023] The bottle cap clamp is arranged inside the sample bottle clamp, and the bottle cap clamp can hold the bottle cap when the sample bottle clamp holds the bottle body, at this time the sample bottle clamp is fixed and the bottle cap clamp rotates, so that the bottle cap can be opened or screwed in, and the bottle cap can be temporarily stored by the bottle cap clamp when the sample bottle is added with liquid.

[0024] The sample bottle clamp and the bottle cap clamp are arranged in two pairs and are located at the working station and the standby station respectively, the two sample bottle clamps and the bottle cap clamps can be alternately rotated to the working station, when the sample bottle clamp and the bottle cap clamp are occupied and cannot transfer the sample bottle by holding and opening the bottle cap, the sample bottle clamp and the bottle cap clamp at the standby station are rotated to the working station to continue the transfer work, which reduces the standby time of the first transfer mechanism and further improves the work efficiency.

[0025] The special-shaped protrusion and the special-shaped slot cooperate, so that the first transfer mechanism can clamp the sample bottle and the bottle cap after the bottle cap is opened in the placement slot. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The structure of the present application Figure 1 ;

[0027] Figure 2 The structure of the present application Figure 2 ;

[0028] Figure 3 It is the internal structure diagram of the utility model;

[0029] Figure 4 It is Figure 1 It is the partial close -up view of A in the middle;

[0030] Figure 5 It is Figure 2 It is the partial close -up view of C in the middle;

[0031] Figure 6 It is Figure 2 It is the partial close -up view of B in the middle;

[0032] Figure 7 It is the structure sectional view of the first transfer mechanism of the utility model;

[0033] Figure 8 It is the structure three-dimensional view of the first transfer mechanism of the utility model;

[0034] In the drawing: 1-sample bottle management module; 2-sample bottle transfer module; 3-solvent injection module; 31-injection groove; 32-liquid outlet; 4-ultrasonic extraction module; 41-placing groove; 42-tray type ultrasonic vibrator; 5-first transfer mechanism; 51-three-axis linear module; 52-sample bottle clamping jaw; 521-base plate; 522-fixed jaw; 523-movable jaw; 524-clamping cylinder; 53-bottle cap clamping jaw; 531-top plate; 532-elastic clamping jaw; 54-cap rotating driving assembly; 541-driven gear; 542-driving gear; 543-driving motor; 544-transition gear; 55-clamping jaw rotating assembly; 6-second transfer mechanism; 61-rotary arm; 62-electric clamping jaw; 63-lifting assembly. DETAILED DESCRIPTION

[0035] The utility model is further described below through specific embodiments.

[0036] Example one:

[0037] Referring to Figures 1 to 8 As shown in the figure, an ultrasonic extraction workstation capable of automatic liquid addition includes a sample bottle management module 1, a sample bottle transfer module 2, a solvent injection module 3, an ultrasonic extraction module 4, a first transfer mechanism 5, and a second transfer mechanism 6.

[0038] The sample bottle management module 1 is used for batch placing of sample bottles to be added with liquid or having been ultrasonically extracted.

[0039] The sample bottle transfer module 2 is used for placing sample bottles after opening the bottle caps.

[0040] The solvent injection module 3 can inject solvent into the sample bottle with opened bottle cap. The solvent injection module 3 comprises an injection slot 31 for placing the sample bottle with opened bottle cap and a liquid outlet 32 opposite to the injection slot 31 and connected with external liquid supply device. By connecting with external liquid supply device, different kinds of solvent can be input into the sample bottle, and different types of test can be carried out. The distance between the injection slot 31 and the liquid outlet 32 is greater than the first transfer mechanism 5, so that the first transfer mechanism 5 can be moved above the injection slot 31 to take or place the sample bottle.

[0041] The ultrasonic extraction module 4 is used for placing the sample bottle with liquid and carrying out ultrasonic extraction. The sample bottle management module 1 and the ultrasonic extraction module 4 are provided with a plurality of placement slots 41 for placing the sample bottle with liquid on the matrix array. The ultrasonic extraction module 4 further comprises a tray type ultrasonic vibrator 42 for applying ultrasonic wave to the sample bottle for extraction.

[0042] The first transfer mechanism 5 can transfer the sample bottle from the sample bottle management module 1 to the sample bottle intermediate module 2 or from the solvent injection module 3 to the ultrasonic extraction module 4, comprising a three-axis linear module 51, a sample bottle clamp jaw 52, a bottle cap clamp jaw 53 and a cap screwing driving assembly 54. The three-axis linear module 51 is arranged above each module. The sample bottle clamp jaw 52 is arranged on the three-axis linear module 51 and can move along three axes, and can be sleeved and clamped on the outside of the sample bottle. The bottle cap clamp jaw 53 is rotatably arranged in the sample bottle clamp jaw 52 and can clamp the bottle cap when the sample bottle clamp jaw 52 clamps the sample bottle. The cap screwing driving assembly 54 is connected with the bottle cap clamp jaw 53 and drives the rotation of the bottle cap clamp jaw 53 to unscrew or screw the bottle cap.

[0043] Specifically, the sample bottle clamp jaw 52 comprises a base plate 521, a fixed jaw 522, a movable jaw 523 and a clamping cylinder 524. The base plate 521 can move with the three-axis linear module 51 above the sample bottle. The fixed jaw 522 is downwardly extended from one side of the base plate 521 and can be in contact with the side surface of the sample bottle. The movable jaw 523 is oppositely arranged on the base plate 521 relative to the fixed jaw 522. The clamping cylinder 524 is arranged on the base plate 521 and connected with the movable jaw 523, and drives the movable jaw 523 to move away from or close to the fixed jaw 522 to release or clamp the sample bottle.

[0044] Further, the bottle cap clamping jaw 53 is rotatably arranged below the base plate 521, comprising a top plate 531 capable of contacting the top surface of the bottle cap and a plurality of elastic clamping jaws 532 shaped and extending downward from the side of the top plate 531. The cap driving assembly 54 comprises a driven gear 541, a driving gear 542 and a driving motor 543. The driven gear 541 is rotatably arranged below the base plate 521, the top plate 531 is connected with the driven gear 541 and can rotate with the driven gear 541; the driving gear 542 is arranged in meshing with the driven gear 541; the driving motor 543 is connected with the driving gear 542 and drives the rotation of the driving gear 542 to drive the rotation of the bottle cap clamping jaw 53 to unscrew or screw the bottle cap. The bottle cap clamping jaw 53 is arranged inside the sample bottle clamping jaw 52, and the bottle cap clamping jaw 53 can clamp the bottle cap when the sample bottle clamping jaw 52 clamps the sample bottle body. At this time, the sample bottle clamping jaw 52 is fixed, and the bottle cap clamping jaw 53 rotates, that is, the bottle cap can be unscrewed or screwed into the bottle cap, and the bottle cap clamping jaw 53 can be used for temporary storage of the bottle cap when the sample bottle is added with liquid.

[0045] Preferably, the sample bottle clamping jaw 52 and the bottle cap clamping jaw 53 are provided with two pairs, the distance between the two sample bottle clamping jaws 52 is equal to the distance between the adjacent two placing grooves 41, so as to avoid interference and collision when the sample bottle management module 1 and the ultrasonic extraction module 4 take or place the sample bottle. The base plates 521 of the two sample bottle clamping jaws 52 are connected with each other, and the first transfer mechanism 5 further comprises a clamping jaw rotating assembly 55, which is a servo motor arranged at the connection of the two base plates 521, so that the two sample bottle clamping jaws 52 and the two bottle cap clamping jaws 53 can rotate between the working station and the standby station. Therefore, the cap driving assembly 54 further comprises a transition gear 544, which is arranged to mesh with the driving gear 542 and is connected with the two driven gears 541 on both sides respectively. The sample bottle clamping jaw 52 and the bottle cap clamping jaw 53 are provided with two pairs, respectively located in the working station and the standby station, and the two sample bottle clamping jaws and the bottle cap clamping jaw 53 can be rotated to the working station alternately, so that when the sample bottle clamping jaw 52 and the bottle cap clamping jaw 53 are clamped and the bottle cap is unscrewed and cannot be transferred, the sample bottle clamping jaw 52 and the bottle cap clamping jaw 53 in the standby station can be rotated to the working station to continue the transfer work, which reduces the standby time of the first transfer mechanism 5 and further improves the work efficiency.

[0046] The second transfer mechanism 6 is arranged between the sample bottle loading module and the solvent injection module 3, and is used to transfer the sample bottle with the opened bottle cap from the sample bottle loading module to the solvent injection module 3. The second transfer mechanism 6 comprises a rotating arm 61, an electric gripper 62 and a lifting assembly 63. The rotating arm 61 is rotatably arranged. The electric gripper 62 is arranged on the rotating arm 61 and can rotate with the rotating arm 61 to be opposite to the sample bottle loading module and the solvent injection module 3 respectively. The lifting assembly is connected with the rotating arm 61 and can drive the rotating arm 61 to lift to pick up the sample bottle at the sample bottle loading module or to place the sample bottle at the solvent injection module 3. The distance from the sample bottle loading module to the solvent injection module 3 to the second transfer mechanism 6 is the same, so that the rotating arm 61 can smoothly complete the transfer of the sample bottle.

[0047] When the workstation is in operation, the operator places a batch of sample bottles loaded with samples to be tested in the sample bottle management module 1 and starts the device. The three-axis linear module 51 drives the sample bottle gripper 52 located at the working station to move to the sample bottle management module 1 to separate and pick up a sample bottle, and the bottle cap gripper 53 is used to unscrew the bottle cap of the sample bottle and temporarily store it therein. After picking up, the sample bottle with the unscrewed bottle cap is placed on the sample bottle transfer module 2. Then the second transfer mechanism 6 transfers the sample bottle to the solvent injection module 3, and at the same time, the gripper rotating assembly 55 drives the sample bottle gripper 52 to rotate, so that the sample bottle gripper 52 loaded with the bottle cap of the sample bottle is rotated to the standby station, and the other empty sample bottle gripper 52 is rotated to the working station to pick up a new sample bottle, unscrew the bottle cap and place it in the sample bottle transfer module 2. After the corresponding solvent is injected into the sample bottle by the solvent injection module 3, the gripper rotating assembly 55 drives the sample bottle at the standby station to rotate to the working station. After the sample bottle gripper 52 picks up the sample bottle, the bottle cap gripper 53 is used to screw the bottle cap back to the sample bottle, and the sample bottle is transferred to the ultrasonic extraction module 4 for ultrasonic vibration extraction. After the transfer of the sample bottle, the second transfer mechanism 6 is reset, and a new sample bottle is transferred from the sample bottle transfer module 2 to the solvent injection module 3. At the same time, the first transfer mechanism 5 places the sample bottle at the ultrasonic extraction module 4 and returns to the sample bottle management module 1 to repeat the above steps until all the sample bottles in the sample bottle management module 1 are completed ultrasonic extraction.

[0048] Embodiment two:

[0049] The difference between this embodiment and embodiment one is that:

[0050] The placing groove 41 and the bottom of the injection groove 31 are both formed with a special-shaped protrusion for limiting the rotation of the sample bottle, and the sample bottle is formed with a special-shaped groove matched with the special-shaped protrusion. The special-shaped protrusion and the special-shaped groove are matched, so that the first transfer mechanism 5 can pick up the sample bottle with the unscrewed bottle cap in the placing groove 41.

[0051] When the workstation is working, an operator places a batch of sample bottles containing samples to be tested in the sample bottle management module 1 and starts the device. The three-axis linear module 51 drives the sample bottle gripper 52 located on the working station to move to the sample bottle management module 1, and the bottle cap gripper 53 is moved downward to clamp the sample bottle cap located in the placing groove 41. After the bottle cap gripper 53 is rotated to open the bottle cap and temporarily stores it, the sample bottle gripper 52 is controlled to clamp the sample bottle. After clamping, the sample bottle with the opened bottle cap is placed on the sample bottle rotating module 2. Then the second transfer mechanism 6 transfers the sample bottle to the solvent injection module 3, and at the same time, the gripper rotating assembly 55 drives the sample bottle gripper 52 to rotate, so that the sample bottle gripper 52 with the sample bottle cap is rotated to the standby station, and the other empty sample bottle gripper 52 is rotated to the working station. After the new sample bottle is clamped and the bottle cap is opened, it is placed in the sample bottle rotating module 2. After the corresponding solvent is injected into the sample bottle by the solvent injection module 3, the gripper rotating assembly 55 drives the sample bottle located at the standby station to rotate to the working station, and the bottle cap gripper 53 is controlled to rotate the bottle cap back to the sample bottle. Then the sample bottle is transferred to the ultrasonic extraction module 4 for ultrasonic vibration extraction. After the sample bottle is transferred, the second transfer mechanism 6 is reset, and the new sample bottle is transferred from the sample bottle rotating module 2 to the solvent injection module 3. At the same time, the first transfer mechanism 5 places the sample bottle at the ultrasonic extraction module 4 and returns to the sample bottle management module 1 to repeat the above steps until all the sample bottles in the sample bottle management module 1 are completed ultrasonic extraction.

[0052] The first transfer mechanism 5 and the second transfer mechanism 6 are used to automatically transfer the sample disc between the modules, and the bottle cap gripper 53 clamps the bottle cap and can rotate to automatically open or tighten the sample bottle cap. After the bottle cap is opened, liquid can be automatically added, so that the operator does not need to frequently repeat the same operation. The operator only needs to take out the sample bottle after ultrasonic extraction, which saves labor and improves work efficiency, and has high practicability.

[0053] The above is only a preferred embodiment of the present application, and therefore cannot limit the scope of the present application. Equivalent changes and modifications made according to the scope of the present application and the content of the specification should still be within the scope of the present application.

Claims

1. An ultrasonic extraction workstation with automatic liquid addition capability, characterized in that: It includes a sample vial management module, a sample vial transfer module, a solvent injection module, an ultrasonic extraction module, a first transfer mechanism, and a second transfer mechanism. The sample vial management module is used to place sample vials in batches for adding liquid or for ultrasonic extraction. The sample vial transfer module is used to hold sample vials after the caps have been opened; The solvent injection module can inject solvent into samples with the bottle cap open; The ultrasonic extraction module is used to place the sample vial containing liquid and perform ultrasonic extraction on it; The first transfer mechanism can transfer sample vials from the sample vial management module to the sample vial transfer module or from the solvent injection module to the ultrasonic extraction module. It includes a three-axis linear module, sample vial grippers, cap grippers, and a capping drive assembly. The three-axis linear module is located above each module. The sample vial grippers are located on the three-axis linear module and can move along the three axes. They can be fitted and clamped on the outside of the sample vial. The cap grippers are rotatably located inside the sample vial grippers and can clamp the caps along with the sample vials. The capping drive assembly is connected to the cap grippers and drives them to rotate to open or tighten the caps. The second transfer mechanism is located between the sample vial filling module and the solvent injection module, and transfers the sample vial with the cap opened from the sample vial filling module to the solvent injection module.

2. The ultrasonic extraction workstation with automatic liquid addition according to claim 1, characterized in that: The sample bottle gripper includes a base plate, a fixed gripper, a movable gripper, and a gripping cylinder. The base plate can move above the sample bottle along with the triaxial linear module. The fixed gripper extends downward from one side of the base plate and can contact the side of the sample bottle. The movable claw is opposite to the fixed claw and is movably mounted on the substrate; the clamping cylinder is mounted on the substrate and connected to the movable claw, driving the movable claw away from or towards the fixed claw to release or clamp the sample bottle.

3. The ultrasonic extraction workstation with automatic liquid addition according to claim 2, characterized in that: The bottle cap gripper is rotatably disposed below the base plate and includes a top plate that can contact the top surface of the bottle cap and several elastic grippers that extend downward from the side of the top plate.

4. The ultrasonic extraction workstation with automatic liquid addition according to claim 3, characterized in that: The cap screwing drive assembly includes a driven gear, a driving gear, and a drive motor. The driven gear is rotatably disposed below the base plate, and the top plate is connected to the driven gear and can rotate with the driven gear. The driving gear and the driven gear are meshed together; the drive motor is connected to the driving gear and drives it to rotate so as to rotate the bottle cap gripper to unscrew or tighten the bottle cap.

5. The ultrasonic extraction workstation with automatic liquid addition according to claim 4, characterized in that: The sample bottle gripper and the bottle cap gripper are provided in two pairs, and the two base plates are connected to each other. The first transfer mechanism also includes a gripper rotation assembly, which is located at the connection of the two base plates, so that the two sample bottle grippers and the two bottle cap grippers can rotate between the working position and the standby position.

6. The ultrasonic extraction workstation with automatic liquid addition according to claim 5, characterized in that: The sample vial filling module and the solvent injection module are at the same distance from the second transfer mechanism. The second transfer mechanism includes a rotating arm, an electric gripper, and a lifting assembly. The rotating arm is rotatably mounted. The electric gripper is mounted on the rotating arm and rotates with the rotating arm to be opposite the sample vial filling module and the solvent injection module, respectively. The lifting assembly is connected to the rotating arm and can drive the rotating arm to lift and lower to pick up the sample vial at the sample vial filling module or put the sample vial down at the solvent injection module.

7. The ultrasonic extraction workstation with automatic liquid addition according to claim 6, characterized in that: The sample bottle management module and the ultrasonic extraction module are equipped with a matrix array of several placement slots for placing sample bottles to be added, and the distance between the grippers of two sample bottles is equal to the distance between two adjacent placement slots.

8. The ultrasonic extraction workstation with automatic liquid addition according to claim 6, characterized in that: The solvent injection module includes an injection tank for holding a sample bottle to be added after the cap has been unscrewed, and an outlet opposite the injection tank that is connected to an external liquid supply device.

9. The ultrasonic extraction workstation with automatic liquid addition according to claim 7, characterized in that: The ultrasonic extraction module also includes a tray-type ultrasonic vibrator that can apply ultrasonic waves to the sample vial for extraction.

10. An ultrasonic extraction workstation with automatic liquid addition capability according to claim 7, characterized in that: The bottom of the placement groove is formed with an irregularly shaped protrusion that restricts the rotation of the sample bottle, and the sample bottle is formed with an irregularly shaped groove that matches the irregularly shaped protrusion.

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