Test tube oscillation device for food pesticide residue detection

Abstract

The utility model discloses a test tube oscillation device for food pesticide residue detection, which comprises a base, a test tube clamping frame, a clamping assembly, a driving assembly and an oscillation assembly, the test tube clamping frame is in sliding connection with the base, the clamping assembly is arranged on the test tube clamping frame and is used for vertically clamping a test tube, and the driving assembly is arranged on the base. The driving assembly is used for driving the test tube clamping frame to horizontally reciprocate on the base, the oscillation assembly comprises an air cylinder, and the air cylinder is used for driving the clamping assembly to longitudinally reciprocate along the test tube clamping frame. Through combination of the driving assembly and the oscillation assembly, the device has three oscillation modes of horizontal oscillation, vertical oscillation and horizontal and vertical combined oscillation, setting of different oscillation parameters can be realized through simple adjustment, and the device has relatively high universality and flexibility.

Description

Technical Field

[0001] The utility model relates to the technical field of food pesticide residue detection, in particular to a test tube oscillating device used for food pesticide residue detection. Background Art

[0002] Pesticide residues refer to the derivatives, metabolites, parent pesticides, degradation products and impurities that remain in the environment, organisms and food after the use of pesticides. The main pesticides that cause excessive pesticide residues in vegetables are organophosphorus pesticides and carbamate pesticides that are banned in vegetable production in some countries, such as parathion, methylamidophos, phorate, omethoate, methyl parathion, etc. Eating vegetables with excessive pesticide residues is very harmful to the human body and can easily cause acute poisoning or even death.

[0003] When testing for pesticide residues in food, a test tube oscillating device for testing for pesticide residues in food is often used to oscillate and mix agricultural product samples and solvents. Or some pesticide residue detection methods require oscillation during the reaction process to promote the reaction. Most existing test tube oscillating devices can only achieve oscillation in a single direction (such as only horizontal or only vertical direction), resulting in uneven mixing of samples and solvents in the test tube. This uneven mixing may affect the accuracy and reliability of the test results. Utility Model Content

[0004] The utility model aims to provide a test tube oscillating device for detecting pesticide residues in food, so as to solve the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides a test tube oscillation device for food pesticide residue detection, which includes a base, a test tube clamping frame, a clamping assembly, a driving assembly and an oscillation assembly. The test tube clamping frame is slidably connected to the base, the clamping assembly is arranged on the test tube clamping frame and is used to vertically clamp the test tube, the driving assembly is used to drive the test tube clamping frame to move horizontally back and forth on the base, and the oscillation assembly includes a cylinder, and the cylinder is used to drive the clamping assembly to move back and forth longitudinally along the test tube clamping frame.

[0006] Further, the clamping assembly includes a fixed frame and a plurality of fixing parts, the fixed frame is slidably connected to the test tube clamping frame and is connected to the piston rod of the cylinder, a plurality of the fixing parts are installed on the fixed frame at equal intervals, the fixing parts include a fixed plate, a movable plate and a bolt, the fixed plate is fixedly installed on the fixed frame, the movable plate is symmetrically arranged with the fixed plate, the threaded end of the bolt passes through the fixed frame and is fixedly connected to the outer side of the movable plate, and the threaded end of the bolt is threadedly connected to the fixed frame.

[0007] Furthermore, the fixing member further comprises a plurality of buffer pads, and the plurality of buffer pads are respectively installed on the inner side of the fixing plate and the inner side of the movable plate.

[0008] Furthermore, the clamping assembly also includes a pressure plate, a threaded rod and a knob. The pressure plate is arranged above the fixing plate and both sides thereof are slidably connected to the fixing frame. There are two threaded rods and two knobs, which are respectively arranged on both sides of the pressure plate. The threaded rod passes through the pressure plate and is threadedly connected to the pressure plate. The end surface of the first end of the threaded rod is in close contact with the fixing frame, and the knob is fixedly mounted on the second end of the threaded rod.

[0009] Furthermore, the driving assembly includes a turntable, a fixed shaft, a connecting rod and a motor. The turntable is arranged on the outside of the base, the fixed shaft is fixedly installed on the outer edge of the turntable along the longitudinal direction, the two ends of the connecting rod are respectively rotatably connected to the test tube clamping frame and the fixed shaft, and the motor is used to drive the turntable to rotate.

[0010] Furthermore, the driving assembly also includes a rotating shaft, the number of which is two, the two rotating shafts are respectively arranged at both ends of the connecting rod, and the first ends are respectively rotatably connected to the connecting rod, and the second ends of the two rotating shafts are respectively detachably connected to the fixed shaft and the test tube clamping frame.

[0011] The beneficial effects of the utility model are as follows: through the combination of the driving component and the oscillation component, the device has three oscillation modes: horizontal oscillation, vertical oscillation, and horizontal and vertical combined oscillation. Different oscillation parameters can be set through simple adjustment, and the device has high versatility and flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0013] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of the utility model.

[0014] Among them: 1. Base; 2. Test tube clamping rack; 3. Clamping assembly; 4. Driving assembly; 5. Oscillation assembly;.

[0015] 31. Fixed frame; 32. Fixed piece; 33. Pressing plate; 34. Threaded rod; 35. Knob; 41. Turntable; 42. Fixed shaft; 43. Connecting rod; 44. Motor; 45. Rotating shaft; 51. Cylinder.

[0016] 321. Fixed plate; 322. Movable plate; 323. Bolts; 324. Buffer pad. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiment is only one embodiment of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0018] In order to make the objectives, technical solutions and advantages of the present application more clear, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] In the following description, references to "one embodiment", "an embodiment", "an example", "an example", etc. indicate that the embodiment or example described in this way may include specific features, structures, characteristics, properties, elements or limitations, but not every embodiment or example necessarily includes the specific features, structures, characteristics, properties, elements or limitations. In addition, repeated use of the phrase "according to one embodiment of the present application" may refer to the same embodiment, but does not necessarily refer to the same embodiment.

[0020] like Figure 1-2 As shown, the utility model discloses a test tube oscillation device for detecting pesticide residues in food, which includes a base 1, a test tube clamping frame 2, a clamping assembly 3, a driving assembly 4 and an oscillating assembly 5. The test tube clamping frame 2 is slidably connected to the base 1, the clamping assembly 3 is arranged on the test tube clamping frame 2 and is used to vertically clamp the test tube, the driving assembly 4 is used to drive the test tube clamping frame 2 to reciprocate horizontally on the base 1, and the oscillating assembly 5 includes a cylinder 51, and the cylinder 51 is used to drive the clamping assembly 3 to reciprocate longitudinally along the test tube clamping frame 2. In this embodiment, a slide groove is provided on the base 1, and the bottom of the test tube clamping frame 2 is slidably connected to the inner wall of the slide groove by a slide rail. A controller is also included, and the controller is electrically connected to the cylinder 51. The controller is a prior art and will not be described in detail here.

[0021] After the driving assembly 4 (such as the motor 44, the crank connecting rod mechanism, etc.) is started, the rotary motion is converted into linear motion through mechanical transmission, thereby driving the test tube clamping frame 2 to reciprocate in the horizontal direction on the base 1. This movement provides a horizontal oscillation effect for the sample in the test tube. The cylinder 51 is driven by air pressure (or hydraulic pressure) to push the clamping assembly 3 (together with the clamped test tube) to reciprocate in the longitudinal direction of the test tube clamping frame 2, providing a longitudinal oscillation effect.

[0022] According to the experimental requirements and sample characteristics of food pesticide residue detection, staff can choose to perform only horizontal oscillation to reduce liquid splashing or bubble generation in the vertical direction. Choosing only vertical oscillation can provide a stronger mixing effect and help disperse solid particles. Choosing a combination of horizontal and vertical oscillations, that is, combining the vertical movement of the test tube with the horizontal movement, forms a composite oscillation trajectory of the test tube in space, which provides a more comprehensive mixing effect for complex samples or detection items that require high sensitivity and high accuracy, and reduces detection errors.

[0023] The utility model combines the driving component 4 and the oscillating component 5 so that the device has three oscillation modes: horizontal oscillation, vertical oscillation, and horizontal and vertical combined oscillation. Different oscillation parameters can be set through simple adjustment, and the device has high versatility and flexibility.

[0024] In one embodiment, the clamping assembly 3 includes a fixed frame 31 and a plurality of fixing members 32, the fixed frame 31 is slidably connected to the test tube clamping frame 2 and is connected to the piston rod of the cylinder 51, and a plurality of fixing members 32 are equidistantly installed on the fixed frame 31, and the fixing members 32 include a fixed plate 321, a movable plate 322 and a bolt 323, and the fixed plate 321 is fixedly installed on the fixed frame 31, and together serves as a basic support surface for clamping the test tube. The movable plate 322 is symmetrically arranged with the fixed plate 321, and the threaded end of the bolt 323 passes through the fixed frame 31 and is fixedly connected to the outer side of the movable plate 322, and the threaded end of the bolt 323 is threadedly connected with the fixed frame 31. Under the action of the bolt 323, the movable plate 322 can move relative to the fixed plate 321, so as to adjust the tightness of clamping the test tube. In an embodiment, the bottom of the test tube can be placed on the fixed frame 31.

[0025] That is, when in use, the test tube is placed between the fixed plate 321 and the movable plate 322, and the bolt 323 is rotated to make the movable plate 322 approach the fixed plate 321 until the test tube is firmly clamped. Since multiple fixing members 32 are installed on the fixed frame 31 at equal intervals, multiple test tubes can be clamped at the same time. When the cylinder 51 is started, the test tube is prevented from being separated from the fixed frame 31, and test tubes of different diameters can be used.

[0026] In one embodiment, the fixing member 32 further includes a plurality of buffer pads 324, which are respectively mounted on the inner side of the fixed plate 321 and the inner side of the movable plate 322. During the clamping and oscillation process, the test tube may be subjected to direct pressure or impact force from the fixed plate 321 and the movable plate 322. The buffer pads 324 can effectively absorb these forces, reduce wear and scratches on the surface of the test tube, and thus protect the integrity of the test tube. At the same time, the buffer pads 324 have a certain degree of elasticity and plasticity, and can better adapt to test tubes of different shapes and sizes. Even if there are slight irregularities or deformations on the surface of the test tube, the buffer pads 324 can fill the gaps by deformation to ensure that the test tube is clamped evenly and tightly.

[0027] In one embodiment, the clamping assembly 3 further includes a pressing plate 33, a threaded rod 34 and a knob 35. The pressing plate 33 is arranged above the fixing plate 321 and is slidably connected to the fixing frame 31 on both sides thereof, so as to provide a stable downward pressure. There are two threaded rods 34 and two knobs 35, which are arranged on both sides of the pressing plate 33 respectively. The threaded rod 34 passes through the pressing plate 33 and is threadedly connected to the pressing plate 33. The end surface of the first end of the threaded rod 34 is in close contact with the fixing frame 31, and the knob 35 is fixedly mounted on the second end of the threaded rod 34. It is convenient for the staff to adjust the position of the pressing plate 33 by the height of the test tube, thereby fixing the test tube plug or the test tube cover on the test tube, and reducing the risk of the test tube plug falling off during the oscillation process.

[0028] In one embodiment, the driving assembly 4 includes a turntable 41, a fixed shaft 42, a connecting rod 43 and a motor 44. The turntable 41 is arranged outside the base 1, and the fixed shaft 42 is fixedly installed on the outer edge of the turntable 41 along the longitudinal direction. The two ends of the connecting rod 43 are respectively connected to the test tube clamping frame 2 and the fixed shaft 42 for rotation. The motor 44 is used to drive the turntable 41 to rotate. In the embodiment, the motor 44 is electrically connected to the controller. The output shaft of the motor 44 is fixedly connected to the center of the turntable 41. When the motor 44 is started, the turntable 41 is driven to rotate, and the test tube clamping frame 2 is moved left and right through the connecting rod 43.

[0029] In one embodiment, the driving assembly 4 further includes a rotating shaft 45, the number of the rotating shaft 45 is two, the two rotating shafts 45 are respectively arranged at the two ends of the connecting rod 43, and the first ends are respectively rotatably connected to the connecting rod 43, and the second ends of the two rotating shafts 45 are respectively detachably connected to the fixed shaft 42 and the test tube clamping frame 2. The second end of the rotating shaft 45 can be clamped with the fixed shaft 42 or the test tube clamping frame 2. The rotating shaft 45 can also be designed with a thread so that the rotating shaft 45 passes through the fixed shaft 42 or the test tube clamping frame 2 and is fixed with a nut. This design allows the driving assembly 4 and the test tube clamping frame 2 to be installed together or disconnected, which is convenient for the staff to maintain and repair the device.

[0030] The working principle of this embodiment is as follows:

[0031] The staff first places the test tube between the fixed plate 321 and the movable plate 322, and rotates the bolt 323 to make the movable plate 322 approach the fixed plate 321 until the test tube is firmly clamped between the fixed plate 321 and the movable plate 322. Then the pressing plate 33 is adjusted so that the pressing plate 33 is in close contact with the test tube plug or the test tube cover, and the knob 35 is tightened so that the end surface of the threaded rod 34 is in close contact with the fixed frame 31.

[0032] The motor 44 is started, and the motor 44 drives the turntable 41 to rotate, and the test tube clamping frame 2 moves left and right through the connecting rod 43. The cylinder 51 is started, and the telescopic rod of the cylinder 51 is extended and retracted, thereby driving the clamping assembly 3 to move up and down along the test tube clamping frame 2. Then the staff selects to start the motor 44 or the cylinder 51 or both at the same time through the controller according to the experimental requirements of the food pesticide residue detection and the characteristics of the sample, so as to oscillate in different directions.

[0033] The utility model combines the driving component 4 and the oscillating component 5 so that the device has three oscillation modes: horizontal oscillation, vertical oscillation, and horizontal and vertical combined oscillation. Different oscillation parameters can be set through simple adjustment, and the device has high versatility and flexibility.

[0034] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A test tube oscillating device for detecting pesticide residues in food, characterized in that: The invention comprises a base, a test tube clamping frame, a clamping assembly, a driving assembly and an oscillating assembly. The test tube clamping frame is slidably connected to the base. The clamping assembly is arranged on the test tube clamping frame and is used to vertically clamp the test tube. The driving assembly is used to drive the test tube clamping frame to reciprocate horizontally on the base. The oscillating assembly comprises a cylinder, and the cylinder is used to drive the clamping assembly to reciprocate longitudinally along the test tube clamping frame.

2. A test tube oscillating device for detecting pesticide residues in food according to claim 1, characterized in that: The clamping assembly includes a fixing frame and a plurality of fixing parts. The fixing frame is slidably connected to the test tube clamping frame and is connected to the piston rod of the cylinder. The plurality of fixing parts are installed on the fixing frame at equal intervals. The fixing parts include a fixing plate, a movable plate and a bolt. The fixing plate is fixedly installed on the fixing frame. The movable plate is symmetrically arranged with the fixing plate. The threaded end of the bolt passes through the fixing frame and is fixedly connected to the outer side of the movable plate. The threaded end of the bolt is threadedly connected to the fixing frame.

3. A test tube oscillating device for detecting pesticide residues in food according to claim 2, characterized in that: The fixing member further comprises a plurality of buffer pads, and the plurality of buffer pads are respectively installed on the inner side of the fixing plate and the inner side of the moving plate.

4. A test tube oscillating device for detecting pesticide residues in food according to claim 2, characterized in that: The clamping assembly also includes a pressing plate, a threaded rod and a knob. The pressing plate is arranged above the fixing plate and both sides of the pressing plate are slidably connected to the fixing frame. There are two threaded rods and two knobs, which are respectively arranged on both sides of the pressing plate. The threaded rod passes through the pressing plate and is threadedly connected to the pressing plate. The end surface of the first end of the threaded rod is in close contact with the fixing frame, and the knob is fixedly mounted on the second end of the threaded rod.

5. A test tube oscillating device for detecting pesticide residues in food according to claim 1, characterized in that: The driving assembly includes a turntable, a fixed shaft, a connecting rod and a motor. The turntable is arranged on the outside of the base. The fixed shaft is fixedly installed on the outer edge of the turntable along the longitudinal direction. The two ends of the connecting rod are respectively rotatably connected to the test tube clamping frame and the fixed shaft. The motor is used to drive the turntable to rotate.

6. A test tube oscillating device for detecting pesticide residues in food according to claim 5, characterized in that: The driving assembly also includes a rotating shaft, and the number of the rotating shafts is two. The two rotating shafts are respectively arranged at both ends of the connecting rod, and the first ends are respectively rotatably connected to the connecting rod, and the second ends of the two rotating shafts are respectively detachably connected to the fixed shaft and the test tube clamping frame.

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