Pretreatment device for detecting pesticide residues on vegetable leaves

Abstract

The utility model discloses a pretreatment device for detecting pesticide residues on vegetable leaves, relates to the technical field of detection of pesticide residues on vegetable leaves, and aims to solve the problems that when a conventional pretreatment crushing device is used, vegetable leaves and vegetable leaves are generally crushed together, so that the concentration of pesticide residues in a crushed mixture is easy to reduce, and the detection efficiency is high. The pesticide residue detection device comprises an electrifying base, the top of the electrifying base is detachably connected with a crushing cylinder, a mounting groove is formed in the top of the electrifying base, a connecting assembly is fixedly arranged at the top of the electrifying base, and a crushing assembly is arranged in the mounting groove; and the crushing assembly comprises a motor detachably arranged in the mounting groove, and the motor is connected with a driving structure rotationally arranged at the top of the electrified base through a motor shaft. The vegetable leaf separation device has the advantages that vegetable leaves and vegetable sides of vegetable leaves are separated, and vegetable side tissue extraction is facilitated for subsequent pesticide residue detection.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of vegetable pesticide residue detection, more particularly to a kind of pretreatment device of vegetable leaf pesticide residue detection. BACKGROUND

[0002] Gas chromatography utilizes the different partition coefficients of different substances between stationary phase and mobile phase to realize the separation of substances. In pesticide residue detection, the pesticide components in the sample are separated on a gas chromatography column, and then detected by a detector. Gas chromatography has the characteristics of good separation effect, fast analysis speed, high sensitivity and good reproducibility. In addition, this method is also suitable for simultaneous detection of multiple pesticide residues, improving the detection efficiency.

[0003] Currently, before detecting the pesticide residues on vegetable leaves using gas chromatography, the vegetable leaves need to be pretreated. Since pesticides are usually sprayed from top to bottom, they will flow down along the leaves and stems, and eventually accumulate in the stems and roots. Especially for vegetables with complex physiological structures such as Chinese cabbage, pesticide residues may be present in every layer of leaves and eventually accumulate in the stem base. At the same time, since the stem is close to the ground, the probability of pesticide reduction or decomposition due to wind and sunlight is relatively small. Therefore, the pesticide residues on the stem are more stubborn. Traditional pretreatment crushing devices usually crush the stem and leaves together, which can easily reduce the concentration of pesticide residues in the crushed mixture, thereby affecting the accuracy of pesticide residue detection. Therefore, we propose a pretreatment device for detecting pesticide residues on vegetable leaves. SUMMARY

[0004] The utility model aims at overcoming the shortcomings of the prior art, adapting to the actual needs, and providing a pretreatment device for detecting pesticide residues on vegetable leaves to solve the technical problem that traditional pretreatment crushing devices usually crush the stem and leaves together, which can easily reduce the concentration of pesticide residues in the crushed mixture, thereby affecting the accuracy of pesticide residue detection.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a pretreatment device for detecting pesticide residues on vegetable leaves, comprising a powered base detachably connected with a crushing cylinder at the top;

[0006] The top of the powered base is provided with a mounting groove, and the top of the powered base is fixedly provided with a connecting assembly, and the mounting groove is provided with a crushing assembly;

[0007] The crushing assembly includes a motor detachably arranged in the mounting groove, a driving structure rotatably arranged on the top of the power supply base and connected with the motor shaft, an installation shaft coaxially and fixedly connected with the top of the driving structure, rotatably penetrating through the connecting assembly and extending into the crushing cylinder, an installation block arranged on the top of the installation shaft, and a rubber strip annularly arranged on the outer edge surface of the installation block and outwardly and upwardly curved to form a hook-shaped end.

[0008] The rubber strip is driven by the motor and the installation shaft is driven by the driving structure to rotate at high speed, so that the rubber strip is expanded outwardly under the action of centrifugal force, and the rubber strip beats the vegetable leaves in the crushing cylinder at the same time, so that the leaves and stems of the vegetable leaves are separated, the stems are heavier, and thus the stems are settled at the bottom of the crushing cylinder, so that the pretreatment of the vegetable leaves is realized, and the stem tissues are beneficial to subsequent pesticide residue detection.

[0009] Preferably, the driving structure includes a counterweight disc a rotatably arranged on the top of the power supply base, a groove formed in the middle of the bottom of the counterweight disc a, a ratchet fixedly installed on the outer edge surface of the top end of the motor shaft, and the ratchet is arranged in the groove.

[0010] Preferably, a rotating shaft is rotatably installed on the top wall of the groove of the counterweight disc a, a pawl is fixedly installed on the outer edge surface of the rotating shaft, a torsion spring is arranged at the rotating connection between the rotating shaft and the counterweight disc a, and the pawl is engaged with the ratchet.

[0011] Preferably, a counterweight pressing disc b is detachably engaged with the top end of the counterweight disc a, and the bottom end of the installation shaft extends out of the connecting assembly and is coaxially connected and fixed with the counterweight pressing disc b.

[0012] Preferably, the connecting assembly includes a connecting seat fixedly arranged on the top of the power supply base, a shaft seat formed in the middle of the connecting seat, and a shaft hole formed in the inside of the shaft seat and adapted to the installation shaft.

[0013] Preferably, the crushing cylinder includes a cylinder body provided with a mounting seat at the bottom, the mounting seat is arranged outside the shaft seat and is screw-connected in the connecting seat, a collision rib is annularly arranged on the inner wall of the cylinder body, a cylinder handle is arranged on the outer edge surface of the cylinder body, and a cylinder cover is detachably arranged on the top of the cylinder body.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The utility model discloses a rubber strip is driven by motor, and is driven installation shaft high -speed rotation through the drive structure to make rubber strip expand outward under the influence of centrifugal force, and the rubber strip will whip the vegetable leaf in the crushing cylinder at the same time of expansion to make the vegetable leaf and the vegetable stem separate, because the specific gravity of vegetable stem is heavier, so settle in the bottom of crushing cylinder, thereby realize the pretreatment of vegetable leaf, be favorable to the extraction of vegetable stem tissue and carry out subsequent pesticide residue detection, solve the problem that traditional pretreatment crushing device is in use, and it usually is broken together with the vegetable stem and the vegetable leaf, and the concentration of pesticide residue in the mixture after crushing is reduced easily, and then the accuracy of pesticide residue detection is influenced.

[0016] 2. The utility model discloses still form the hook shaped end through the bottom end of rubber strip outward turning and bending upwards, and the hook shaped end is moved synchronously in the centrifugal motion of rubber strip, and the hook shaped structure of hook shaped end can be favorable to the vegetable leaf of the position close to crushing cylinder in the rotation process, to improve the separation effect of the vegetable stem and the vegetable leaf in the vegetable leaf in crushing cylinder.

[0017] 3. The utility model discloses still design counterweight tooth disc a and counterweight pressure disc b, in the process of motor drive installation shaft rotation, can power off to motor, make it stop rotation, to drive installation shaft to rotate under the inertial action of counterweight tooth disc a and counterweight pressure disc b gradually, to gradually reduce the whipping intensity of vegetable leaf, avoid the vegetable stem to be broken by whipping force being too big. ACCURATE DESCRIPTION

[0018] Figure 1 It is the structure schematic drawing of the utility model;

[0019] Figure 2 It is the split schematic drawing of the utility model; Figure 1

[0020] Figure 3 It is the sectional view of the utility model; Figure 1

[0021] Figure 4 It is the sectional view of crushing cylinder of the utility model;

[0022] Figure 5 It is the sectional view of connecting component of the utility model;

[0023] Figure 6 It is the structure schematic drawing of crushing component of the utility model;

[0024] Figure 7 It is the bottom structure schematic drawing of counterweight tooth disc a of the utility model.

[0025] Mark explanation in drawing:

[0026] ​​1, power base; 2, crushing cylinder; 201, cylinder body; 202, mounting seat; 203, collision rib; 204, cylinder handle; 205, cylinder cover; 3, connecting assembly; 301, connecting seat; 302, shaft seat; 4, crushing assembly; 401, motor; 402, ratchet; 403, rotating shaft; 404, pawl; 405, counterweight disc a; 406, counterweight pressure disc b; 407, mounting shaft; 408, rubber strip; 409, hook-shaped end. DETAILED DESCRIPTION

[0027] As Figures 1-7 shown, the utility model relates to a kind of pretreatment device of vegetable leaf pesticide residue detection, including the power base 1 of detachable connection with the crushing cylinder 2 of top, the top of power base 1 is formed with mounting groove, and the top of power base 1 is fixedly provided with connecting assembly 3, mounting groove is provided with crushing assembly 4, and crushing assembly 4 includes motor 401 detachably arranged in mounting groove, motor 401 is connected with the drive structure rotatably arranged in the top of power base 1 by motor shaft, the top of drive structure is coaxially fixedly connected with the mounting shaft 407 rotatably passing out of connecting assembly 3 and extending into crushing cylinder 2, and the top of mounting shaft 407 is structured with mounting block, and rubber strip 408 is fixedly provided on the outer edge surface of mounting block in annular array, and the bottom end of rubber strip 408 is outwardly curved to form hook-shaped end 409.

[0028] In the embodiment of the utility model, drive structure includes counterweight disc a 405 rotatably arranged in the top of power base 1, recess is formed in the bottom end of counterweight disc a 405, motor 401 is fixedly installed with ratchet 402 on the outer edge surface of motor shaft top, and ratchet 402 is arranged in recess, rotating shaft 403 is rotatably installed on the top wall of recess of counterweight disc a 405, pawl 404 is fixedly installed on the outer edge surface of rotating shaft 403, and torsional spring is arranged at the rotation connection of rotating shaft 403 and counterweight disc a 405, pawl 404 is engaged with ratchet 402, and the one-way locking state of ratchet 402 and pawl 404 drives counterweight disc a 405 to rotate, and counterweight pressure disc b 406 is detachably engaged on the top of counterweight disc a 405, and the bottom end of mounting shaft 407 extends out of connecting assembly 3 and is coaxially connected and fixed with counterweight pressure disc b 406.

[0029] Driven by motor 401, ratchet 402 rotates, and under the one-way locking state of pawl 404, counterweight disc a 405 is driven to rotate, so that counterweight pressure disc b 406 is driven to rotate under the engagement of counterweight disc a 405 and counterweight pressure disc b 406, so that mounting shaft 407 rotates at high speed.

[0030] In the embodiment of the utility model, connecting assembly 3 includes the connecting seat 301 of fixed setting in the top of power supply base 1, the middle part of connecting seat 301 is formed with shaft seat 302, the inside of shaft seat 302 is formed with the shaft hole of the rotation of the adaptive installation shaft 407.

[0031] In the embodiment of the utility model, the broken cylinder 2 includes the cylinder body 201 of bottom end formation with mounting seat 202, the mounting seat 202 is covered in the outside of shaft seat 302 and is screwed in connecting seat 301, the inner wall of cylinder body 201 is formed with the collision convex rib 203 in annular array structure, the rubber strip 408 can cooperate with the collision convex rib 203 in the whipping process of the rotating process to the vegetable leaf, thereby improving the separation effect of the vegetable leaf and the vegetable stem, and the outer edge surface of cylinder body 201 is formed with cylinder handle 204, and the top end of cylinder body 201 is detachably covered with cylinder cover 205.

[0032] Working principle: the embodiment provides a kind of pretreatment device for vegetable leaf pesticide residue detection, when using, first open cylinder cover 205, put vegetable leaf into cylinder body 201, then cover cylinder cover 205, by motor 401 drive, make ratchet wheel 402 rotate, and drive counterweight disc a 405 rotation under the one-way lock state of with pawl 404, so that counterweight disc b 406 is rotated under the meshing cooperation of counterweight disc a 405 and counterweight disc b 406, so that installation shaft 407 is rotated at high speed, so that rubber strip 408 is expanded outward under the influence of centrifugal force, while expanding, rubber strip 408 will whip vegetable leaf in broken cylinder 2, so that the vegetable leaf and the vegetable stem of vegetable leaf are separated, by the bottom end of rubber strip 408 is turned up and bent to form hook end 409, rubber strip 408 will drive hook end 409 movement in the process of centrifugal motion, by the hook structure of hook end 409 can be beneficial to the vegetable leaf close to broken cylinder 2 in the rotating process, so as to improve the separation effect of the vegetable leaf and the vegetable stem in the vegetable leaf in broken cylinder 2, in the process of driving installation shaft 407 rotation by motor 401, can be powered off motor 401, so that it is stopped, so that installation shaft 407 is rotated under the inertia effect of counterweight disc a 405 and counterweight disc b 406, so as to gradually reduce the whipping intensity of vegetable leaf, avoid that the whipping force is too large and causes the broken of vegetable stem.

[0033] The embodiment of the utility model discloses the preferable embodiment, but is not limited to this, ordinary skilled in the art, the spirit of the utility model is easily understood according to the above-mentioned embodiment, and different induction and change are made, but as long as not departing from the spirit of the utility model, all are within the protection scope of the utility model.

Claims

1. A pretreatment device for detecting pesticide residues in vegetable leaves, characterized in that: It comprises an electrified base (1) with a crushing cylinder (2) detachably connected to the top; A mounting groove is formed on the top of the power base (1), and a connecting component (3) is fixedly provided on the top of the power base (1), and a crushing component (4) is provided in the mounting groove; The crushing assembly (4) comprises a motor (401) detachably arranged in the mounting groove, the motor (401) being connected to a driving structure rotatably arranged on the top of the powered base (1) via a motor shaft, the top end of the driving structure being coaxially fixedly connected to a mounting shaft (407) rotatably passing through the connecting assembly (3) and extending into the crushing cylinder (2), the top end of the mounting shaft (407) being configured with a mounting block, the outer edge surface of the mounting block being fixedly provided with rubber strips (408) in an annular array, the bottom end of the rubber strips (408) being outwardly turned and upwardly bent to form a hook-shaped end (409).

2. A pretreatment device for detecting pesticide residues in vegetable leaves according to claim 1, characterized in that: The driving structure comprises a counterweight chainring a (405) rotatably arranged on the top of the powered base (1); a groove is formed in the center of the bottom end of the counterweight chainring a (405); a ratchet (402) is fixedly mounted on the outer edge surface of the top end of the motor shaft of the motor (401); and the ratchet (402) is arranged in the groove.

3. A pretreatment device for detecting pesticide residues in vegetable leaves according to claim 2, characterized in that: A rotating shaft (403) is rotatably mounted on the top wall of the groove of the counterweight chainring a (405), a pawl (404) is fixedly mounted on the outer edge surface of the rotating shaft (403), and a torsion spring is provided at the rotation connection between the rotating shaft (403) and the counterweight chainring a (405), and the pawl (404) is engaged with the ratchet (402).

4. A pretreatment device for detecting pesticide residues in vegetable leaves according to claim 3, characterized in that: The top end of the counterweight chainring a (405) is detachably engaged with a counterweight pressure plate b (406), and the bottom end of the mounting shaft (407) extends out of the connecting assembly (3) and is coaxially connected and fixed to the counterweight pressure plate b (406).

5. A pretreatment device for detecting pesticide residues in vegetable leaves according to claim 1, characterized in that: The connecting assembly (3) comprises a connecting seat (301) fixedly arranged on the top of the powered base (1); a shaft seat (302) is formed in the middle structure of the connecting seat (301); and a shaft hole is formed inside the shaft seat (302) for the mounting shaft (407) to rotate through.

6. A pretreatment device for detecting pesticide residues in vegetable leaves according to claim 1, characterized in that: The crushing cylinder (2) comprises a cylinder body (201) with a mounting seat (202) formed at the bottom end thereof, the mounting seat (202) being covered on the outside of the shaft seat (302) and being threadedly connected to the connecting seat (301), collision ribs (203) being formed in an annular array on the inner wall of the cylinder body (201), a cylinder handle (204) being arranged on the outer edge surface of the cylinder body (201), and a cylinder cover (205) being provided on the top end of the cylinder body (201) being detachable.

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