CN114113502B - Filter device for pesticide residue detection and application method thereof - Google Patents
Filter device for pesticide residue detection and application method thereof Download PDFInfo
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- CN114113502B CN114113502B CN202111405486.3A CN202111405486A CN114113502B CN 114113502 B CN114113502 B CN 114113502B CN 202111405486 A CN202111405486 A CN 202111405486A CN 114113502 B CN114113502 B CN 114113502B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
- G01N33/025—Fruits or vegetables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N1/4077—Concentrating samples by other techniques involving separation of suspended solids
- G01N2001/4088—Concentrating samples by other techniques involving separation of suspended solids filtration
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a filtering device for detecting pesticide residues, which comprises an outer box which is vertically distributed, wherein a filter plate is horizontally arranged in the outer box, a motor is arranged on the outer top surface of the outer box, an output shaft of the motor is fixedly connected with a vertical shaft through a coupler, a shaft sleeve is sleeved on the periphery of the vertical shaft in a sliding manner, the vertical shaft can drive the shaft sleeve to rotate, the shaft sleeve is positioned in the outer box, a transverse shaft is rotatably connected to the side wall of the shaft sleeve, and a plurality of suckers are movably arranged on the outer wall of the transverse shaft. The invention can effectively avoid filter residues from blocking the filter holes; the filter residues in the accommodating cavity can be prevented from being thrown out through the guide inlet, so that smooth operation is ensured; and the external impurities can be prevented from entering the inner part of the outer box through the feed inlet, so that the purity of the pesticide residue stock solution is ensured.
Description
Technical Field
The invention relates to the technical field of pesticide residue detection, in particular to a filtering device for pesticide residue detection and a using method thereof.
Background
And (3) the phenomenon that part of pesticide residues directly or indirectly remain in grains, vegetables, fruits, livestock products, aquatic products and soil and water bodies after pesticide application in agricultural production. Pesticides applied to crops, some of which adhere to crops and some of which are scattered in the soil, atmosphere, water and other environments, some of the pesticide remaining in the environment is absorbed by plants. The residual pesticide can be directly delivered into human body and livestock body by means of plant fruit or water and atmosphere or finally delivered into human body and livestock by means of environment and food chain. The pesticide residue stripper can degrade pesticide residues on the surfaces of fruits and vegetables.
For the pesticide residue, the residue needs to be detected in time to ensure healthy fruits of edible crops. Before the pesticide residue is detected, the pesticide residue stock solution needs to be filtered to obtain relatively pure stock solution. However, the present filter device has the following disadvantages:
1. the phenomenon that filter residues block filter holes exists, so that the speed and the efficiency of filtration are affected;
2. the filter residue cannot be effectively sucked away, and the condition that the filter residue is sucked away and then re-enters the stock solution exists, so that the operation complexity is increased;
3. the part of feed inlet can't be closed automatically, has the external impurity to enter into the risk in the outer container, has reduced the purity degree of stoste.
Disclosure of Invention
The invention aims to provide a filtering device for detecting pesticide residues, which is used for solving the problem that filter residues block filter holes and influence the filtering speed and efficiency; the filter residue cannot be effectively sucked away, and the condition that the filter residue is sucked away and then re-enters the stock solution exists, so that the operation complexity is increased; the feeding port part can not be automatically closed, the risk that external impurities enter the outer box exists, and the purity of the stock solution is reduced.
In order to achieve the above object, the present invention adopts the following technical scheme: the utility model provides a pesticide residue detects uses filter equipment, includes the outer box of vertical distribution, the inside level of outer box is equipped with the filter plate, the motor is installed to the outer top surface of outer box, fixedly connected with vertical axis through the shaft coupling on the output shaft of motor, the peripheral slip cap of vertical axis is equipped with the axle sleeve, the vertical axis can drive the axle sleeve and rotate, the axle sleeve is located the inside of outer box, rotate on the lateral wall of axle sleeve and be connected with the cross axle, the activity is equipped with a plurality of sucking discs on the outer wall of cross axle;
the top end of the shaft sleeve is communicated with a rotary joint, the rotary joint is communicated with a negative pressure air source through an air pipe, an accommodating cavity is formed in the transverse shaft, the inner end of the accommodating cavity is communicated with the rotary joint through a vertical shaft and a clearance groove between the shaft sleeves, the sucking disc can suck filter residues in the filter holes into the accommodating cavity under the action of negative pressure, and a residue taking port is formed in the outer end of the transverse shaft;
the upper left corner of outer case is equipped with the feed inlet, be equipped with closing mechanism in the feed inlet, closing mechanism can be closed in order to avoid external impurity to enter into the inside of outer case automatically.
Preferably, the outer end of the sucking disc extends to the outside of the transverse shaft, the inner end of the sucking disc extends to the inside of the accommodating cavity, the inlet is formed in the inner end of the sucking disc, the sliding groove is formed in the outer wall of the transverse shaft, the inner end of the sucking disc penetrates through the sliding groove, a first spring is arranged between the inner end of the sucking disc and the sliding groove, and when the outer end of the sucking disc extrudes the filter plate, the first spring is compressed and shortened, and meanwhile the inlet slides to the inside of the accommodating cavity.
Preferably, the lateral wall of vertical axle is fixed with a plurality of shelves strips along vertical direction, a plurality of fender grooves have been seted up along vertical direction on the inner wall of axle sleeve, the cooperation of shelves strip sets up in the inside that keeps off the groove, be formed with the clearance groove between the outer wall of vertical axle and the inner wall of axle sleeve.
Preferably, a connection plane is arranged at a position where the outer wall of the shaft sleeve is connected with the inner end of the transverse shaft, three groups of transverse shafts are arranged, the three groups of transverse shafts are uniformly distributed along the height direction of the shaft sleeve, each group of transverse shafts are two, the two transverse shafts are positioned on the same straight line, the inner end of the transverse shaft is rotationally connected with the connection plane through a bearing, and a sealing ring is arranged between the inner end of the transverse shaft and the shaft sleeve.
Preferably, a differential pressure mechanism is fixed on the right wall of the outer box, an air inlet pipe is arranged at the bottom end of the differential pressure mechanism in a communicated mode, the bottom end of the air inlet pipe extends to the inner bottom of the outer box, an air outlet pipe is arranged at the top end of the differential pressure mechanism in a communicated mode, and the top end of the air outlet pipe extends to the inner top of the outer box.
Preferably, the differential pressure mechanism comprises a mounting shell and a mounting plate, wherein the mounting plate is horizontally fixed in the mounting shell, a fan is mounted on the bottom surface of the mounting plate, a vent is formed in the mounting plate, and air at the bottom in the outer box can enter the inner top of the outer box through an air inlet pipe, the vent and an air outlet pipe.
Preferably, the number of the filter plates is multiple, the filter plates are uniformly distributed in the outer box along the height direction, the shaft sleeve penetrates through the center positions of the filter plates in a sliding mode, the first baffle is fixed at the bottom end of the shaft sleeve, the second springs are arranged on the periphery of the bottom end of the shaft sleeve, and the second springs are located between the first baffle and the bottom surface of the lowest filter plate.
Preferably, the closing mechanism comprises a sloping plate and a closing plate, the sloping plate is obliquely fixed in the feed inlet, a material guide opening is formed in the sloping plate, the closing plate is attached to the bottom surface of the sloping plate, a guide rod is fixed at the central position of the closing plate, the guide rod penetrates through the central position of the sloping plate in a sliding mode, a stop block is fixed at the top end of the guide rod, a third spring is arranged on the periphery of the guide rod, and the third spring is located between the stop block and the top surface of the sloping plate.
In addition, the invention also discloses a using method of the filtering device for detecting pesticide residues, which comprises the following steps:
s1: the motor is started, an output shaft of the motor drives a vertical shaft to rotate, the vertical shaft drives a shaft sleeve to rotate, and the shaft sleeve drives a transverse shaft and a sucker to rotate;
s2: the negative pressure air source is started, negative pressure is formed in the accommodating cavity through the air pipe, the rotary joint and the clearance groove, meanwhile, the outer end of the sucker extrudes the filter plate, the first spring is compressed and shortened, the guide inlet slides into the accommodating cavity, and filter residues in the filter hole are sucked into the accommodating cavity through the guide inlet under the action of the negative pressure;
s3: the sucking disc that is not pressed by the filter plate outwards slides under the elasticity effect of first spring, the inner of sucking disc supports the lateral wall that holds the cavity, and the leading-in mouth enters into the sliding tray in order to avoid holding the inside filter residue of cavity and outwards spill from the leading-in mouth.
Compared with the prior art, the filter device for detecting the pesticide residue has the following beneficial effects:
1. the negative pressure air source sucks air in the clearance groove through the rotary joint, the clearance groove is communicated with the accommodating cavity, so that negative pressure is generated in the accommodating cavity, the accommodating cavity is communicated with the sucker, negative pressure is generated in the sucker, filter residues in the filter holes are sucked into the accommodating cavity through the sucker, meanwhile, the blocking piece blocks the filter residues and gathers the filter residues in the accommodating cavity, and after the use is finished, a negative pressure device is communicated with the residue taking port, so that the filter residues in the accommodating cavity can be sucked away from the residue taking port, and the subsequent use is facilitated;
2. when the outer end extrusion of sucking disc is to the filter plate, the filter residue in the filtration pore enters into the outer end inside of sucking disc at first, then flows to the inner inside of sucking disc, and the time, first spring is compressed and shortens, and the whole direction that holds the cavity of sucking disc slides, and the inner of sucking disc slides in the direction that holds the cavity towards holding the cavity in the sliding tray, and at this moment, the inner of sucking disc stretches into the length that holds the cavity in and increases, simultaneously, the inner of sucking disc drives the import that it was gone up and slides to the inside that holds the cavity to the filter residue of the inner inside of sucking disc flows to the inside that holds the cavity through the import. In addition, because the transverse shaft rotates around the axis of the transverse shaft, when the transverse shaft drives a certain sucking disc to rotate and enables the sucking disc to be separated from the contact filter plate, the sucking disc is restored to the initial position under the action of the elastic force of the first spring, at the moment, the whole sucking disc slides towards the direction away from the accommodating cavity, the inner end of the sucking disc drives the guide inlet on the sucking disc to enter the sliding groove, filter residues in the accommodating cavity are prevented from being thrown out through the guide inlet, and smooth operation is ensured;
3. adding the stoste to be filtered in to the feed inlet, the pressure of stoste promotes the closure plate and moves down to the right, make and break away from the laminating between closure plate, the swash plate, thereby the feed inlet is opened, the stoste flows down from the feed inlet and enters into the interior top of outer case, the closure plate drives the guide arm, the dog moves down, the third spring is compressed to shorten and save elastic potential energy, after the stoste flows, under the elasticity effect of third spring, the top of third spring drives the dog and moves upwards left, the dog passes through the guide arm and pulls the closure plate and move upwards left, make the top surface of closure plate laminate the bottom surface of swash plate, thereby the shutoff feed inlet, in order to avoid external impurity to enter into the inside of outer case through the feed inlet, ensure the purity of pesticide residue stoste.
Drawings
FIG. 1 is a front cross-sectional view of an embodiment of a filter device for detecting pesticide residues according to the present invention;
FIG. 2 is a schematic perspective view of an embodiment showing the position of the cross shaft and the filter plate;
FIG. 3 is a schematic perspective view of the suction cup in position in an embodiment;
FIG. 4 is a cross-sectional view of an embodiment at a vertical axis, sleeve mating position;
FIG. 5 is a front cross-sectional view of an embodiment with a transverse axis, at the location of the receiving chamber;
FIG. 6 is an enlarged schematic view of FIG. 1A according to an embodiment;
FIG. 7 is an enlarged schematic view of FIG. 5C of an embodiment;
FIG. 8 is a schematic cross-sectional view of a differential pressure mechanism in an embodiment;
fig. 9 is an enlarged schematic view at B in fig. 1 of the embodiment.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
The filtering device for detecting pesticide residues shown in fig. 1-3 comprises an outer box 1 which is vertically distributed, wherein a filter plate 2 is horizontally arranged in the outer box 1, the cross section of an inner cavity of the outer box 1 is of a circular structure, the filter plate 2 is also of a circular structure, a discharge hole is formed in the central position of the bottom surface of the outer box 1, in addition, bases (not shown in the drawing) are arranged on two sides of the bottom end of the outer box 1, and the bases are used for supporting the outer box 1. The motor 4 is installed to the outer top surface of outer case 1, through shaft coupling fixedly connected with vertical axis 41 on the output shaft of motor 4, wherein, vertical axis 41 distributes along vertical direction, vertical axis 41 runs through the central point department of outer case 1, the peripheral slip cap of vertical axis 41 is equipped with axle sleeve 42, concretely, axle sleeve 42 can slide along the direction of height of vertical axis 41, vertical axis 41 can drive axle sleeve 42 rotation, axle sleeve 42 is located the inside of outer case 1, rotate on the lateral wall of axle sleeve 42 and be connected with cross axle 44, the activity is equipped with a plurality of sucking discs 45 on the outer wall of cross axle 44.
In use, the original liquid of pesticide residue to be filtered is firstly added into the outer box 1, the original liquid is blocked above the filter plate 2, then the filtered liquid flows downwards through the filter plate 2, and finally the filtered liquid is discharged through the discharge port, so that the next detection operation is facilitated. In the filtration, need start motor 4, motor 4's output shaft drives vertical axis 41 rotation, and vertical axis 41 drives axle sleeve 42 and rotates around motor 4's output shaft's central line, and axle sleeve 42 drives cross axle 44 circumference rotation, and cross axle 44 drives a plurality of sucking discs 45 and rotates simultaneously, and wherein, a plurality of sucking discs 45 can suck the filter residue, avoid filter residue to block up the filtration pore 21 on the filter plate 2, simultaneously, and cross axle 44 circumference rotation drives pesticide residue stoste and rotates together and form the vortex, can improve filtration efficiency.
As shown in fig. 1, 4 and 5, the top periphery of the shaft sleeve 42 is communicated with a rotary joint 43, the rotary joint 43 is communicated with a negative pressure air source through an air pipe 5, an accommodating cavity 442 is formed in the transverse shaft 44, the inner end of the accommodating cavity 442 is communicated with the rotary joint 43 through a vertical shaft 41 and a clearance groove 423 between the shaft sleeves 42, the sucking disc 45 can suck filter residues in the filter holes 21 into the accommodating cavity 442 under the action of negative pressure, a slag taking port 441 is formed in the outer end of the transverse shaft 44, a blocking piece 444 is fixed at the right end of the accommodating cavity 442, an air hole is reserved between the top end of the blocking piece 444 and the right end top wall of the accommodating cavity 442, the air hole is used for communicating the clearance groove 423 with the accommodating cavity 442, negative pressure can be generated in the accommodating cavity 442, and the blocking piece 444 is used for blocking the filter residues and avoiding entering the inside of the clearance groove 423.
In use, the negative pressure air source is opened, the air in the clearance groove 423 is sucked away by the negative pressure air source through the rotary joint 43, the accommodating cavity 442 is communicated in view of the clearance groove 423, thereby negative pressure is generated in the accommodating cavity 442, negative pressure is generated in the sucker 45 in view of the accommodating cavity 442 and the filter residue in the filter hole 21 is sucked away by the sucker 45, the filter residue is sucked into the accommodating cavity 442 through the sucker 45, meanwhile, the blocking piece 444 blocks the filter residue and gathers the filter residue in the accommodating cavity 442, after the use is finished, the filter residue in the accommodating cavity 442 can be sucked away from the residue taking port 441 by communicating a negative pressure device with the residue taking port 441, and the subsequent use of the accommodating cavity 442 is facilitated for residue collecting treatment.
As shown in fig. 5 and 7, the outer end of the suction cup 45 extends to the outside of the lateral shaft 44, the inner end of the suction cup 45 extends to the inside of the accommodating chamber 442, the inner end of the suction cup 45 is provided with an inlet 452, the outer wall of the lateral shaft 44 is provided with a sliding groove 443, the inner end of the suction cup 45 is distributed through the sliding groove 443, a first spring 451 is arranged between the inner end of the suction cup 45 and the sliding groove 443, and when the outer end of the suction cup 45 presses the filter plate 2, the first spring 451 is compressed and shortened, and the inlet 452 slides to the inside of the accommodating chamber 442.
In use, when the outer end of the suction cup 45 is pressed to the filter plate 2, the filter residue in the filter hole 21 firstly enters the outer end of the suction cup 45 and then flows into the inner end of the suction cup 45, during which the first spring 451 is compressed and shortened, the suction cup 45 integrally slides towards the accommodating chamber 442, the inner end of the suction cup 45 slides towards the accommodating chamber 442 in the sliding slot 443, at this time, the length of the inner end of the suction cup 45 extending into the accommodating chamber 442 increases, and meanwhile, the inner end of the suction cup 45 drives the introducing port 452 thereon to slide into the accommodating chamber 442, so that the filter residue in the inner end of the suction cup 45 flows into the accommodating chamber 442 through the introducing port 452, and the function of collecting the filter residue is realized. In addition, in view of the fact that the transverse shaft 44 rotates around its own axis, when the transverse shaft 44 drives a certain suction cup 45 to rotate and makes the suction cup 45 separate from the contact filter plate 2, the suction cup 45 is restored to the initial position under the action of the elastic force of the first spring 451, at this time, the whole suction cup 45 slides towards the direction away from the accommodating chamber 442, the inner end of the suction cup 45 drives the introducing port 452 thereon to enter the sliding groove 443, so that the filter residues in the accommodating chamber 442 are prevented from being thrown out through the introducing port 452, and smooth operation is ensured.
When the cross shaft 44 continuously rotates around the central line of the output shaft of the motor 4, the cross shaft 44 simultaneously rotates around the axis of the cross shaft 44, and the cross shaft 44 drives the plurality of suckers 45 to sequentially contact the extrusion filter plate 2 at intervals, so that continuous repeated continuous sucking of filter residues is realized, and filter residues can be effectively prevented from blocking the filter holes 21.
As shown in fig. 4, a plurality of blocking strips 411 are fixed on the side wall of the vertical shaft 41 along the vertical direction, the blocking strips 411 are uniformly distributed on the side wall of the vertical shaft 41 along the circumferential direction, a plurality of blocking grooves 422 are formed on the inner wall of the shaft sleeve 42 along the vertical direction, the blocking grooves 422 are uniformly distributed on the inner wall of the shaft sleeve 42 along the circumferential direction, and the blocking strips 411 are matched and arranged in the blocking grooves 422, wherein the cross sections of the blocking strips 411 and the blocking grooves 422 are rectangular structures. A clearance groove 423 is formed between the outer wall of the vertical shaft 41 and the inner wall of the boss 42, wherein the clearance groove 423 is fully distributed in the height direction of the inner wall of the boss 42, and the tip of the clearance groove 423 communicates with the rotary joint 43, and the clearance groove 423 communicates with the inner end of the accommodation chamber 442 at the side wall position thereof.
In use, when the vertical shaft 41 rotates around the axis of the vertical shaft 41, the vertical shaft 41 drives the plurality of baffle strips 411 to rotate simultaneously, and under the action of mutual cooperation of the baffle strips 411 and the baffle grooves 422, the vertical shaft 41 drives the shaft sleeve 42 to rotate around the axis of the vertical shaft 41 and the shaft sleeve 42, so that the linkage function between the vertical shaft 41 and the shaft sleeve 42 is realized, wherein the cross sections of the baffle strips 411 and the baffle grooves 422 are designed in a rectangular structure, the relative sliding between the baffle strips 411 and the baffle grooves 422 can be avoided, and the good cooperation relationship between the baffle strips 411 and the baffle grooves 422 is ensured. Finally, the clearance groove 423 is used for communicating the rotary joint 43 and the accommodating chamber 442, so as to ensure that a negative pressure environment can be formed in the accommodating chamber 442, so as to facilitate the sucking disc 45 to suck the filter residues.
As shown in fig. 1, 2 and 4, a connection plane 421 is disposed at a position where an outer wall of the shaft sleeve 42 is connected with an inner end of the cross shaft 44, three groups of cross shafts 44 are uniformly distributed along a height direction of the shaft sleeve 42, wherein a plurality of filter plates 2 are uniformly distributed in the height direction inside the outer case 1, three groups of cross shafts 44 and three filter plates 2 are correspondingly distributed, each group of cross shafts 44 has two cross shafts 44, the two cross shafts 44 are located on the same straight line, the inner ends of the cross shafts 44 are rotatably connected with the connection plane 421 through bearings, and a sealing ring is disposed between the inner ends of the cross shafts 44 and the shaft sleeve 42.
In the use, when axle sleeve 42 circumference rotation, axle sleeve 42 drives three group's cross axle 44 and rotates simultaneously, three group's cross axle 44 rotates along the top surface of three filter plate 2 respectively, three group's cross axle 44 can drive a plurality of sucking discs 45 extrusion contact filter plate 2's top surface simultaneously, can carry out the processing of sucking away to the filter residue on the three filter plate 2 simultaneously, can avoid three filter plate 2 to be stopped up the condition simultaneously, in addition, two cross axles 44 in every group's cross axle 44 are along same straight line distribution, these two cross axles 44 distribute along the same diameter of filter plate 2, the top surface of filter plate 2 is covered that can be better, thereby improve the sucking away efficiency of filter residue, finally, the inner of cross axle 44 is rotated through the bearing and is set up on connecting plane 421, can ensure the stable setting of cross axle 44, the sealing washer plays sealed effect, avoid the solution in the outer container 1 to enter into the inside of clearance groove 423, ensure safe operation.
As shown in fig. 1 and 9, the sleeve 42 is slidably inserted through the center of the plurality of filter plates 2, the first baffle 424 is fixed to the bottom end of the sleeve 42, and the second spring 425 is provided on the periphery of the bottom end of the sleeve 42, and the second spring 425 is located between the first baffle 424 and the bottom surface of the lowermost filter plate 2.
In use, when more stock solution is to be filtered in the outer box 1, the water pressure of the stock solution presses the transverse shaft 44 downwards to move downwards, the transverse shaft 44 drives the shaft sleeve 42 to move downwards, the shaft sleeve 42 can slide along the height direction of the vertical shaft 41, meanwhile, the shaft sleeve 42 slides along the up-down direction relative to the filter plate 2, at the moment, the bottom end of the shaft sleeve 42 drives the first baffle 424 to slide up and down, the second spring 425 is compressed and shortened or is recovered and lengthened to adapt to the change of the height position of the shaft sleeve 42, the buffer function is provided for protecting the transverse shaft 44, and meanwhile, the high adaptability is also provided.
As shown in fig. 1, a differential pressure mechanism 3 is fixed on the right wall of the outer box 1, the bottom end of the differential pressure mechanism 3 is communicated with an air inlet pipe 31, the bottom end of the air inlet pipe 31 extends to the inner bottom of the outer box 1, the top end of the differential pressure mechanism 3 is communicated with an air outlet pipe 32, and the top end of the air outlet pipe 32 extends to the inner top of the outer box 1. Specifically, as shown in fig. 8, the differential pressure mechanism 3 includes a mounting case and a mounting plate 34, the mounting plate 34 is horizontally fixed in the mounting case, the fan 33 is mounted on the bottom surface of the mounting plate 34, the mounting plate 34 is provided with a vent 341, and air at the bottom inside the outer box 1 can enter the inner top of the outer box 1 through the air inlet pipe 31, the vent 341 and the air outlet pipe 32.
In use, the fan 33 is started, the fan 33 forms airflow vortex, so that air at the bottom in the outer box 1 is sucked away, air at the bottom in the outer box 1 is sucked into the air inlet pipe 31, air in the air inlet pipe 31 enters the air vent 341 and the air outlet pipe 32, and air in the air outlet pipe 32 enters the inner top of the outer box 1 from the top end of the air outlet pipe, so that positive pressure is formed at the inner top of the outer box 1 while negative pressure is formed at the inner bottom of the outer box 1, pressure difference is formed, raw liquid to be filtered can be pressed downwards by the pressure difference, filtering speed is improved, and operation time is shortened.
As shown in fig. 1, the upper left corner of the outer box 1 is provided with a feed inlet 6, and the inside of the feed inlet 6 is provided with a closing mechanism which can be automatically closed to avoid external impurities from entering the inside of the outer box 1. Specifically, as shown in fig. 6, the closing mechanism includes a sloping plate 61 and a closing plate 62, the sloping plate 61 is fixed in the feed inlet 6 in an inclined manner, a feed guide hole 611 is formed in the sloping plate 61, the closing plate 62 is attached to the bottom surface of the sloping plate 61, a guide rod 63 is fixed at the central position of the closing plate 62, the guide rod 63 is slidably inserted into the central position of the sloping plate 61, a stop block 64 is fixed at the top end of the guide rod 63, a third spring 65 is arranged on the periphery of the guide rod 63, and the third spring 65 is located between the stop block 64 and the top surface of the sloping plate 61.
In use, the stock solution to be filtered is firstly added into the feed inlet 6, the pressure of the stock solution pushes the closing plate 62 to move downwards to the right, so that the closing plate 62 and the inclined plate 61 are separated from each other, the feed inlet 611 is opened, the stock solution flows downwards from the feed inlet 611 to enter the inner top of the outer box 1, the closing plate 62 drives the guide rod 63 and the stop block 64 to move downwards, the third spring 65 is compressed and shortened, elastic potential energy is stored, after the flow of the stock solution is finished, under the action of the elastic force of the third spring 65, the top end of the third spring 65 drives the stop block 64 to move upwards to the left, and the stop block 64 pulls the closing plate 62 to move upwards to the left through the guide rod 63, so that the top surface of the closing plate 62 is attached to the bottom surface of the inclined plate 61, and the feed inlet 6 is blocked, so that external impurities are prevented from entering the inner part of the outer box 1 through the feed inlet 6, and the purity of the pesticide residue stock solution is ensured.
In addition, the invention also discloses a using method of the filtering device for detecting pesticide residues, which comprises the following steps:
s1: starting the motor 4, wherein an output shaft of the motor 4 drives the vertical shaft 41 to rotate, the vertical shaft 41 drives the shaft sleeve 42 to rotate, and the shaft sleeve 42 drives the transverse shaft 44 and the sucker 45 to rotate;
s2: the negative pressure air source is opened, the negative pressure air source forms negative pressure in the accommodating cavity 442 through the air pipe 5, the rotary joint 43 and the clearance groove 423, meanwhile, the outer end of the sucking disc 45 presses the filter plate 2, the first spring 451 is compressed and shortened, the introducing port 452 slides into the accommodating cavity 442, and filter residues in the filter holes 21 are sucked into the accommodating cavity 442 through the introducing port 452 under the action of the negative pressure;
s3: the suction cup 45 not pressed by the filter sheet 2 slides outward by the elastic force of the first spring 451, the inner end of the suction cup 45 abuts against the side wall of the accommodation chamber 442, and the introduction port 452 enters into the sliding groove 443, so that the filter residues inside the accommodation chamber 442 are prevented from leaking out from the introduction port 452.
While the foregoing is directed to the preferred embodiment of the present invention, other and further modifications and improvements may be made by those skilled in the art without departing from the principles of the invention, and such are intended to be considered within the scope of the invention.
Claims (8)
1. The utility model provides a pesticide residue detects uses filter equipment, includes outer case (1) of vertical distribution, the inside level of outer case (1) is equipped with filter plate (2), motor (4), its characterized in that are installed to the outer top surface of outer case (1): the output shaft of the motor (4) is fixedly connected with a vertical shaft (41) through a coupler, a shaft sleeve (42) is sleeved on the periphery of the vertical shaft (41) in a sliding mode, the vertical shaft (41) can drive the shaft sleeve (42) to rotate, the shaft sleeve (42) is positioned in the outer box (1), a lateral shaft (44) is rotatably connected to the side wall of the shaft sleeve (42), and a plurality of suckers (45) are movably arranged on the outer wall of the lateral shaft (44);
the device is characterized in that a rotary joint (43) is arranged at the top end of the shaft sleeve (42) in a communicating manner, the rotary joint (43) is communicated with a negative pressure air source through an air pipe (5), a containing cavity (442) is formed in the transverse shaft (44), the inner end of the containing cavity (442) is communicated with the rotary joint (43) through a vertical shaft (41) and a clearance groove (423) between the shaft sleeve (42), the sucking disc (45) can suck filter residues in the filtering holes (21) into the containing cavity (442) under the action of negative pressure, and a slag taking port (441) is formed in the outer end of the transverse shaft (44);
the upper left corner of the outer box (1) is provided with a feed inlet (6), and a closing mechanism is arranged in the feed inlet (6) and can be automatically closed to prevent external impurities from entering the inner part of the outer box (1);
the outer end of sucking disc (45) extends to the outside of cross axle (44), the inside of holding cavity (442) is extended to the inner of sucking disc (45), guide-in mouth (452) have been seted up to the inner of sucking disc (45), sliding tray (443) have been seted up on the outer wall of cross axle (44), the inner of sucking disc (45) runs through sliding tray (443), be equipped with first spring (451) between the inner of sucking disc (45) and sliding tray (443), works as when the outer end extrusion of sucking disc (45) is to filter plate (2), first spring (451) are compressed to shorten, simultaneously guide-in mouth (452) slide to the inside of holding cavity (442).
2. The filter device for detecting agricultural chemical residue according to claim 1, wherein: the side wall of vertical axle (41) is fixed with a plurality of shelves strip (411) along vertical direction, a plurality of fender grooves (422) have been seted up along vertical direction on the inner wall of axle sleeve (42), the cooperation of shelves strip (411) sets up in the inside of fender groove (422), be formed with clearance groove (423) between the outer wall of vertical axle (41) and the inner wall of axle sleeve (42).
3. The filter device for detecting agricultural chemical residue according to claim 1, wherein: the connecting plane (421) is arranged at the position where the outer wall of the shaft sleeve (42) is connected with the inner end of the transverse shaft (44), three groups of transverse shafts (44) are uniformly distributed along the height direction of the shaft sleeve (42), each group of transverse shafts (44) is two, the two transverse shafts (44) are positioned on the same straight line, the inner end of the transverse shaft (44) is rotationally connected with the connecting plane (421) through a bearing, and a sealing ring is arranged between the inner end of the transverse shaft (44) and the shaft sleeve (42).
4. The filter device for detecting agricultural chemical residue according to claim 1, wherein: the novel air conditioner is characterized in that a differential pressure mechanism (3) is fixed on the right wall of the outer box (1), an air inlet pipe (31) is arranged at the bottom end of the differential pressure mechanism (3) in a communicating mode, the bottom end of the air inlet pipe (31) extends to the inner bottom of the outer box (1), an air outlet pipe (32) is arranged at the top end of the differential pressure mechanism (3) in a communicating mode, and the top end of the air outlet pipe (32) extends to the inner top of the outer box (1).
5. The filter device for detecting agricultural chemical residue according to claim 4, wherein: the differential mechanism (3) comprises a mounting shell and a mounting plate (34), wherein the mounting plate (34) is horizontally fixed in the mounting shell, a fan (33) is mounted on the bottom surface of the mounting plate (34), a vent (341) is formed in the mounting plate (34), and air at the bottom in the outer box (1) can enter the inner top of the outer box (1) through an air inlet pipe (31), the vent (341) and an air outlet pipe (32).
6. The filter device for detecting agricultural chemical residue according to claim 1, wherein: the filter plate (2) is a plurality of in quantity, a plurality of filter plate (2) are in the inside of outer case (1) along direction of height evenly distributed, the central point department of a plurality of filter plates (2) is run through in the slip of axle sleeve (42), the bottom mounting of axle sleeve (42) has first baffle (424), the bottom periphery of axle sleeve (42) is equipped with second spring (425), second spring (425) are located between the bottom surface of first baffle (424) and the filter plate (2) of lowest.
7. The filter device for detecting agricultural chemical residue according to claim 1, wherein: the utility model provides a closed mechanism includes swash plate (61) and closure plate (62), swash plate (61) slope is fixed in feed inlet (6), guide mouth (611) have been seted up on swash plate (61), closure plate (62) laminating sets up on the bottom surface of swash plate (61), the central point department of closure plate (62) is fixed with guide arm (63), guide arm (63) slip runs through the central point department at swash plate (61), the top of guide arm (63) is fixed with dog (64), the periphery of guide arm (63) is equipped with third spring (65), third spring (65) are located between the top surface of dog (64) and swash plate (61).
8. A method of using the filter device for pesticide residue detection according to claim 1, comprising the steps of:
s1: starting the motor (4), wherein an output shaft of the motor (4) drives a vertical shaft (41) to rotate, the vertical shaft (41) drives a shaft sleeve (42) to rotate, and the shaft sleeve (42) drives a transverse shaft (44) and a sucker (45) to rotate;
s2: the negative pressure air source is started, negative pressure is formed in the accommodating cavity (442) through the air pipe (5), the rotary joint (43) and the clearance groove (423), meanwhile, the outer end of the sucker (45) presses the filter plate (2), the first spring (451) is compressed and shortened, the introducing port (452) slides into the accommodating cavity (442), and filter residues in the filter holes (21) are sucked into the accommodating cavity (442) through the introducing port (452) under the action of the negative pressure;
s3: the sucking disc (45) which is not extruded by the filter plate (2) slides outwards under the action of the elastic force of the first spring (451), the inner end of the sucking disc (45) props against the side wall of the accommodating cavity (442), and the introducing port (452) enters the sliding groove (443) so as to prevent filter residues in the accommodating cavity (442) from leaking outwards from the introducing port (452).
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