CN111896695A - Food detects with device of purification liquid - Google Patents
Food detects with device of purification liquid Download PDFInfo
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- CN111896695A CN111896695A CN202010689540.0A CN202010689540A CN111896695A CN 111896695 A CN111896695 A CN 111896695A CN 202010689540 A CN202010689540 A CN 202010689540A CN 111896695 A CN111896695 A CN 111896695A
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- G—PHYSICS
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
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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
- G01N2001/4083—Concentrating samples by other techniques involving separation of suspended solids sedimentation
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Abstract
The invention relates to a device for purifying liquid for food detection, which comprises a fine separation mechanism, wherein the fine separation mechanism comprises a separation cylinder and a centrifugal impeller arranged at the center of the bottom in the separation cylinder; the separating cylinder comprises an inner wall and an outer wall which are sequentially erected from inside to outside; a plurality of gaps with smaller width are uniformly arranged on the inner wall; each notch corresponds to a drainage plate; the drainage plate is arc-shaped and slightly protrudes outwards towards one side of the tangent direction of the notch; the drainage plate is connected with the end part of the inner wall at one side of the notch, the side is the rear end in the liquid flowing direction, and the drainage plate and the end part of the inner wall at the side have smooth transition, so that a bypass for liquid to flow out is formed at the notch; the device for purifying the liquid for food detection can quickly, efficiently and high-quality obtain the food extracting solution, and is convenient for food safety detection.
Description
Technical Field
The invention relates to the field of food detection, in particular to a liquid purification device for food detection.
Background
The food safety detection is used for detecting harmful substances in food according to national indexes, and mainly used for detecting harmful and toxic indexes, such as heavy metal, aflatoxin and the like. An important aspect of food science and engineering is the introduction and use of chemical unit operations and the development of food engineering unit operations, thereby promoting the development of the food industry towards large-scale, continuous and automated.
The liquid that will more accurate detection harmful substance in food just needs to obtain food separation extraction at first, current separation and purification device volume, the separation time, separation efficiency, separation purity etc. all have great improvement space, especially the food detection field, the sample that needs to detect is more, detection cycle is short, consequently need quick, high-efficient and high-quality acquisition to detect the extract of food, current purification device or equipment is too big, or too exquisite, high price, the operation is complicated, the purification time is long, and because the variety of food, be difficult to be applicable to the food field.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a device for purifying liquid for food detection, which can quickly, efficiently and high-quality obtain food extract and is convenient for food safety detection.
The technical scheme of the invention is as follows:
a device for purifying liquid for food detection comprises a fine separation mechanism, wherein the fine separation mechanism comprises a separation cylinder and a centrifugal impeller arranged at the center of the bottom in the separation cylinder; the separating cylinder comprises an inner wall and an outer wall which are sequentially erected from inside to outside; a plurality of gaps with smaller width are uniformly arranged on the inner wall; each notch corresponds to a drainage plate; the drainage plate is arc-shaped and slightly protrudes outwards towards one side of the tangent direction of the notch; the drainage plate is connected with the end part of the inner wall on one side of the notch, the side is the rear end of the liquid flowing direction, and the drainage plate and the end part of the inner wall on the side have smooth transition, so that a bypass for liquid to flow out is formed at the notch.
And the end part of the inner wall at the other side of the notch is sharpened, and is cut and polished outwards for a certain depth.
Wherein, the outer end of the outer wall is provided with a plurality of connecting pipes; the connecting pipe is positioned at the lower part of the outer wall and is inclined downwards, and the connecting pipe is communicated with the inside and the outside of the outer wall; the connecting pipe is sleeved with a rubber sleeve; when sampling, the rubber sleeve is sleeved with the sampling test tube for sampling.
Wherein a pre-separation mechanism is arranged above the fine separation mechanism; the pre-separation mechanism comprises a receiving hopper, a rotating shaft and a spiral guide groove which rotates around the rotating shaft from top to bottom; a filter screen is arranged in the receiving hopper; the main shaft is driven by a motor to rotate; the spiral guide slot is fixed in the rotating shaft and rotates along with the rotating shaft, and the diameter of the spiral guide slot is gradually increased from top to bottom.
Wherein a crushing mechanism is arranged above the pre-separating mechanism; the crushing mechanism comprises a horn-shaped feed hopper and a crushing barrel which is positioned below the feed hopper and communicated with the feed hopper; a cutter holder is arranged at the center in the crushing cylinder; the cutter holder is a cylinder, and the diameter of the cutter holder is smaller than that of the crushing cylinder; a plurality of first blades which are horizontally arranged are uniformly arranged on the circumferential surface of the cutter holder; the first blade is divergently arranged by taking the cutter holder as a center; a plurality of second blades are arranged on the inner circumferential surface of the crushing cylinder corresponding to the first blades; the first blade and the second blade are arranged in a staggered mode up and down to form a scissor shape; the first blade and the second blade are of a left-right double-edge structure; any one of the first blade and the second blade is driven by a piezoelectric elastic sheet to swing left and right respectively, and the corresponding first blade and the corresponding second blade swing in opposite directions at the same time to form shearing action.
The piezoelectric elastic sheet comprises a flat and long glass fiber sheet and piezoelectric ceramic sheets closely attached to two sides of the glass fiber sheet; the tail end of the first blade or the second blade is fixedly connected with the outer end of the glass fiber sheet.
Wherein, the blade holder is rotatable and shares the pivot with spiral guide slot and centrifugal impeller.
The piezoelectric elastic sheet is wrapped with elastic rubber, the first blade or the second blade extends out, and the joint of the first blade or the second blade is sealed; the elastic rubber extends up and down and is jointed with the outer surface of the tool apron, and the joint is sealed.
The piezoelectric elastic piece is partially or completely embedded into the notch.
The invention has the following beneficial effects:
1. the invention can obtain food extract rapidly, efficiently and high-quality, and is convenient for food safety detection.
2. The crushing mechanism utilizes the inverse piezoelectric effect, utilizes the piezoelectric elastic sheet to drive the blade to do high-speed shearing action and compound the flat cutting action, can efficiently cut and crush food in a smaller space to adapt to the characteristics of various foods, has extremely high cutting and crushing speed, can adjust the speed and amplitude of the shearing action according to different food characteristics, and is not easy to cause the blockage of a channel by the food.
3. The pre-separation mechanism can realize coarse centrifugation to promote the sedimentation of suspended particles in liquid; and the process of gradually accelerating the food mixture is realized, so that the food mixture has a larger linear velocity at the beginning of the fine separation stage, and the acceleration stage of the fine separation stage is omitted, thereby being beneficial to making the fine separation mechanism small, reducing the time required by fine separation, improving the separation effect of fine separation and avoiding that suspended particles and liquid are separated out simultaneously before the acceleration stage does not enjoy the centrifugal separation effect.
4. The fine separation mechanism of the invention can realize liquid purification with high speed and high quality by utilizing the coanda effect and the characteristic of suspended mixed liquid in the centrifugal process.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a piezoelectric dome;
fig. 3 is a schematic top view of the fine separation mechanism.
The reference numbers in the figures denote:
1-a crushing mechanism, 11-a feed hopper, 12-a crushing barrel, 121-a second blade, 13-a cutter holder, 131-a first blade, 132-a notch, 14-a piezoelectric elastic sheet, 141-a glass fiber sheet, 142-a piezoelectric ceramic sheet, 2-a pre-separating mechanism, 21-a receiving hopper, 22-a rotating shaft, 23-a spiral guide groove, 24-a bearing, 3-a fine separating mechanism, 31-a separating barrel, 32-an inner wall, 321-a notch, 322-a drainage plate, 33-an outer wall, 331-a connecting pipe, 332-a rubber sleeve, 36-a centrifugal impeller, 4-a test tube, 5-a motor and a 6-structure box body.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1 to 3, a device for purifying liquid for food detection includes a crushing mechanism 1, a pre-separation mechanism 2 and a fine separation mechanism 3, wherein the crushing mechanism 1, the pre-separation mechanism 2 and the fine separation mechanism 3 are sequentially arranged from top to bottom and communicated with each other.
The crushing mechanism 1 comprises a horn-shaped feed hopper 11 and a crushing barrel 12 which is positioned below the feed hopper 11 and communicated with the feed hopper 11; a cutter holder 13 is arranged at the center in the crushing barrel 12; the tool apron 13 is a cylinder, and the diameter of the tool apron is smaller than that of the crushing barrel 12; a plurality of first blades 131 which are horizontally arranged are uniformly arranged on the circumferential surface of the cutter holder 13; the first blade 131 is divergently arranged by taking the cutter holder 13 as a center; a plurality of second blades 121 are arranged on the inner circumferential surface of the crushing cylinder 12 corresponding to the first blades 131; the first blade 131 and the second blade 121 are arranged in a staggered manner from top to bottom to form a scissors shape; the first blade 131 and the second blade 121 both adopt a left-right double-edge structure; any one of the first blade 131 and the second blade 121 is driven by a piezoelectric elastic sheet 14 to swing left and right, and the corresponding first blade 131 and the corresponding second blade 121 swing in opposite directions at the same time to form a scissor function; the piezoelectric elastic sheet 14 comprises a long and flat glass fiber sheet 141 and piezoelectric ceramic sheets 142 closely attached to two sides of the glass fiber sheet 141; the tail end of the first blade 131 or the second blade 121 is fixedly connected with the outer end of the glass fiber sheet 141; when positive and negative voltages are applied to the piezoelectric ceramic pieces 142, the piezoelectric ceramic pieces 142 deform, and the two piezoelectric ceramic pieces 142 deform to drive the glass fiber piece 141 to deflect and bend left and right, so that the first blade 131 or the second blade 121 is driven to swing left and right; the piezoelectric elastic sheet 14 is used for driving the blade to form the scissors, so that the scissors are extremely fast and controllable in movement speed, food can be cut rapidly and uniformly, and the scissors are not easy to block; when the first blade 131 moves laterally to the left, the second blade 121 at the left front moves laterally to the right, forming a scissor motion with the first blade 131; when the first blade 131 moves laterally to the right next time, the second blade 121 on the inner circumferential surface of the crushing cylinder 12 moves to the left, and the first blade 131 and another second blade 121 in front of the first blade 131 form a scissor motion, so that the first blade 131 and the second blade 121 need to be sharpened on the left and right sides, and the scissor motion cutting efficiency is extremely high because the left and right sides can form the scissor motion; the cylindrical design of the tool apron 13, in cooperation with the circumferential surface of the inner wall of the crushing cylinder 12, enlarges the swing range of the blade, and the smaller swing range of the glass fiber sheet 141 can drive the larger swing range of the first blade 131 and the second blade 121.
In order to prevent food residues from covering and affecting the piezoelectric elastic sheet 14, elastic rubber is wrapped outside the piezoelectric elastic sheet 14, only the first blade 131 or the second blade 121 extends out, and the joint of the first blade 131 or the second blade 121 is sealed; the elastic rubber extends up and down and engages the outer surface of the holder 13, and is also sealed.
In addition, an annular notch 132 is horizontally formed in the circumferential surface of the tool holder 13 along the circumferential surface, the piezoelectric elastic piece 14 is partially or completely embedded in the notch 132, and the notch 132 is horizontally and annularly formed, and the piezoelectric elastic piece 14 horizontally moves, so that the movement of the piezoelectric elastic piece 14 is not hindered.
The pre-separation mechanism 2 comprises a receiving hopper 21 arranged below the crushing cylinder 12, a rotating shaft 22 and a spiral guide groove 23 which surrounds the rotating shaft 22 from top to bottom; a filter screen is arranged in the receiving hopper 21; the main shaft 22 is driven by a motor 5 to rotate; the spiral guide groove 23 is fixed on the rotating shaft 22 and rotates along with the rotating shaft 22, and the diameter of the spiral guide groove 23 is gradually increased from top to bottom; the structure has the functions of guiding the crushed food and liquid thereof downwards; secondly, coarse centrifugation is realized to promote the sedimentation of suspended particles in the liquid; and thirdly, the process of gradually increasing the speed is realized, so that the liquid has a larger linear speed at the beginning of the fine separation stage, and the acceleration stage of the fine separation stage is omitted, so that firstly, the mechanism for fine separation can be reduced, secondly, the time required by fine separation can be reduced, thirdly, the separation effect of fine separation is improved, and the suspended particles and the liquid are prevented from being separated out simultaneously in the acceleration stage before the centrifugal separation effect is not enjoyed.
The fine separation mechanism 3 comprises a separation cylinder 31 and a centrifugal impeller 36 arranged at the center of the bottom in the separation cylinder 31; the separation cylinder 31 is fixed at the lower part of a mechanism box body 6 of the liquid separating device, and the centrifugal impeller 36 and the spiral guide groove 23 share the rotating shaft 22; the separating cylinder 31 comprises an inner wall 32 and an outer wall 33 which are erected from inside to outside in sequence; the lower end of the spiral guide groove 23 is positioned above the centrifugal impeller 36 close to the center of the separation cylinder 31; a plurality of notches 321 with smaller width are uniformly arranged on the inner wall 32; each notch 321 corresponds to a drainage plate 322; the drainage plate 322 is arc-shaped and slightly protrudes outwards towards one side of the tangent direction of the notch 321; the drainage plate 322 is connected to the end of the inner wall 32 on one side of the notch 321, which is the rear end of the liquid flowing direction, and the drainage plate 322 is located at the end of the inner wall 32 on the side of the notch 321 where the liquid flows first, and the drainage plate 322 and the end of the inner wall 32 on the side have smooth transition; meanwhile, the end of the inner wall 32 on the other side is sharpened and cut and polished outwards for a certain depth, so that a bypass for liquid to flow out is formed at the notch 321, and the aim is to utilize the coanda effect to guide the liquid directly contacted with the inner wall 32 to flow out to the space between the inner wall 32 and the outer wall 33 through the bypass; the solid residue will directly go over the gap 321 under the inertia and self-size constraint; the suspended matter, because it does not directly contact the inner wall 32, will also pass over the gap 321 under the influence of inertia, under the partial liquid entrainment that does not directly contact the inner wall 32; the end part of the inner wall 32 on the other side of the notch 32 is cut and polished outwards to a certain depth, and the outward displacement of the solid residues or suspended matters within the width range of the notch 321 under the action of centrifugal force is counteracted by the depth, so that the solid residues and the suspended matters cannot enter the bypass, and the fine separation of liquid is realized; in addition, the bottom of the gap 321 is slightly higher than the bottom of the space enclosed by the inner wall 32, so that the settling of suspended particles is promoted during the centrifugation process, and the settled suspended particles are located below the gap 321 and are further prevented from escaping from the bypass.
A plurality of connecting pipes 331 are arranged at the outer end of the outer wall 33; the adapter tube 331 is positioned at the lower part of the outer wall 33 and is inclined downwards, and the adapter tube 331 is communicated with the inside and the outside of the outer wall 33; the connecting pipe 331 is sleeved with a rubber sleeve 332; during the sample, the 4 covers of sample test tube establish can take a sample on rubber sleeve 332, owing to have a plurality of takeovers 331, consequently can take a sample many test tube appearance simultaneously, need not use takeover 331 that the rubber stopper blocks up can.
Further, the tool holder 13 can rotate and share a rotating shaft 22 with the centrifugal impeller 36, and the rotating shaft 22 extends upwards and is fixed on the upper part of the structure box 6 of the liquid separation device through a bearing 24. The arrangement can enhance the stability of the rotating shaft 22 on one hand, and can enable the first blade 131 and the second blade 121 to have a scissor action and a circular cutting action simultaneously on the other hand, so that the cutting effect and the cutting speed can be improved, and material blockage can be prevented.
The working principle of the invention is as follows:
starting the motor 5, adding a certain amount of water into food to be detected if the food is dry, pouring the food into the feed hopper 11, allowing the food to fall from the feed hopper 11 to the crushing cylinder 12, and under the application of positive and negative voltages switched at high external frequency, the two piezoelectric ceramic sheets 142 alternately undergo deformation of shortening and extending, so that the glass fiber sheet 141 clamped in the middle swings left and right, thereby driving the first blade 131 to swing left and right at high speed, and meanwhile, the second blade 121 also swings left and right at high speed under the same principle, but the swinging direction at the same time is opposite to that of the first blade 131, and the first blade 131 and the second blade 121 form a scissor action to shear the food; meanwhile, the tool apron 13 is driven by the rotating shaft 22 to rotate, so that the first blade 131 and the second blade 121 have a flat cutting action, and the two actions are combined;
the chopped food is mixed with liquid and falls, particles visible to naked eyes are filtered by the filter screen and fall to the spiral guide groove 23, the food slides down along the spiral guide groove 23, and meanwhile, the spiral guide groove 23 rotates to realize coarse centrifugation, so that suspended particles in the liquid are precipitated; and the process of gradually accelerating the food mixture is realized, so that the food mixture has a larger linear velocity at the beginning of the fine separation stage, and the acceleration stage of the fine separation stage is omitted, thereby being beneficial to making the fine separation mechanism small, reducing the time required by fine separation, improving the separation effect of fine separation and avoiding that suspended particles and liquid are separated out simultaneously before the acceleration stage does not enjoy the centrifugal separation effect.
The roughly separated food mixture is thrown down to the center of the separation cylinder 31, is thrown outwards under the centrifugal action of the centrifugal blades 36 and flows along the inner wall 32 in a circumferential manner, and according to the coanda effect, the liquid directly contacting the inner wall 32 is guided by the bypass to flow out to the space between the inner wall 32 and the outer wall 33; the solid residue will directly go over the gap 321 under the inertia and self-size constraint; the suspended matter, because it does not directly contact the inner wall 32, will also pass over the gap 321 under the influence of inertia, under the partial liquid entrainment that does not directly contact the inner wall 32; the end part of the inner wall 32 on the other side of the notch 32 is cut and polished outwards to a certain depth, and the outward displacement of the solid residues or suspended matters within the width range of the notch 321 under the action of centrifugal force is counteracted by the depth, so that the solid residues and the suspended matters cannot enter the bypass, and the fine separation of liquid is realized; in addition, the bottom of the gap 321 is slightly higher than the bottom of the space enclosed by the inner wall 32, so that the settling of suspended particles is promoted during the centrifugation process, and the settled suspended particles are located below the gap 321 and are further prevented from escaping from the bypass.
The separated liquid reaches the outer wall 33 and flows out through the connecting pipe 331 to enter the sampling test tube 4 sleeved on the rubber sleeve 332, after sufficient sampling is performed, the motor 5 is turned off, the test tube 4 is taken down and sealed for detection.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A device for purifying liquid for food detection is characterized in that: the device comprises a fine separation mechanism (3), wherein the fine separation mechanism (3) comprises a separation cylinder (31) and a centrifugal impeller (36) arranged at the center of the bottom in the separation cylinder (31); the separating cylinder (31) comprises an inner wall (32) and an outer wall (33) which are erected from inside to outside in sequence; a plurality of gaps (321) with smaller width are uniformly arranged on the inner wall (32); each notch (321) corresponds to one drainage plate (322); the guide plate (322) is arc-shaped and slightly protrudes outwards towards one side of the tangential direction of the notch (321); the end part of the inner wall (32) at one side of the notch (321) is connected with the drainage plate (322), the side is the rear end of the liquid flowing direction, and the end parts of the guide plate (322) and the inner wall (32) at the side have smooth transition, so that a bypass for liquid to flow out is formed at the notch (321).
2. The apparatus for purifying liquid for food inspection according to claim 1, wherein: the end part of the inner wall (32) at the other side of the notch (321) is sharpened and is cut and polished outwards for a certain depth.
3. The apparatus for purifying liquid for food inspection according to claim 1, wherein: a plurality of connecting pipes (331) are arranged at the outer end of the outer wall (33); the connecting pipe (331) is positioned at the lower part of the outer wall (33) and is inclined downwards, and the connecting pipe (331) is communicated with the inside and the outside of the outer wall (33); a rubber sleeve (332) is sleeved on the connecting pipe (331); when sampling, the sampling test tube (4) is sleeved on the rubber sleeve (332) for sampling.
4. A device for purifying liquid for food inspection according to claim 3, wherein: a pre-separation mechanism (2) is arranged above the fine separation mechanism (3); the pre-separation mechanism (2) comprises a receiving hopper (21), a rotating shaft (22) and a spiral guide groove (23) which winds the main shaft (22) from top to bottom; a filter screen is arranged in the receiving hopper (21); the main shaft (22) is driven to rotate by a motor (5); the spiral guide groove (23) is fixed on the rotating shaft (22) and rotates along with the rotating shaft (22), and the diameter of the spiral guide groove (23) is gradually increased from top to bottom.
5. The apparatus for purifying liquid for food inspection according to any one of claims 1 to 4, wherein: a crushing mechanism (1) is arranged above the pre-separating mechanism (2); the crushing mechanism (1) comprises a horn-shaped feed hopper (11) and a crushing cylinder (12) which is positioned below the feed hopper (11) and communicated with the feed hopper (11); a cutter holder (13) is arranged at the center in the crushing cylinder (12); the tool apron (13) is a cylinder, and the diameter of the tool apron is smaller than that of the crushing cylinder (12); a plurality of first blades (131) which are horizontally arranged are uniformly arranged on the circumferential surface of the cutter holder (13); the first blade (131) is divergently arranged by taking the cutter holder (13) as a center; a plurality of second blades (121) are arranged on the inner circumferential surface of the crushing cylinder (12) corresponding to the first blades (131); the first blade (131) and the second blade (121) are arranged in a staggered manner from top to bottom to form a scissor shape; the first blade (131) and the second blade (121) both adopt a left-right double-edge structure; any one of the first blade (131) and the second blade (121) is driven by a piezoelectric elastic sheet (14) to swing left and right, and the corresponding first blade (131) and the corresponding second blade (121) swing in opposite directions at the same time to form shearing action.
6. The apparatus for purifying liquid for food inspection according to any one of claims 1 to 4, wherein: the piezoelectric elastic sheet (14) comprises a flat and long glass fiber sheet (141) and piezoelectric ceramic sheets (142) closely attached to two sides of the glass fiber sheet (141); the tail end of the first blade (131) or the second blade (121) is fixedly connected with the outer end of the glass fiber sheet (141).
7. The apparatus for purifying liquid for food inspection according to claim 6, wherein: the tool apron (13) can rotate and shares a rotating shaft (22) with the spiral guide groove (23) and the centrifugal impeller (36).
8. The apparatus for purifying liquid for food inspection according to claim 7, wherein: the piezoelectric elastic sheet (14) is wrapped by elastic rubber, the first blade (131) or the second blade (121) extends out, and the joint of the first blade and the second blade is sealed; the elastic rubber extends up and down and is jointed with the outer surface of the tool apron (13), and the joint is sealed.
9. The apparatus for purifying liquid for food inspection according to claim 8, wherein: an annular notch (132) is horizontally formed in the circumferential surface of the tool apron (13) along the circumferential surface, and the piezoelectric elastic piece (14) is partially or completely embedded into the notch (132).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010689540.0A CN111896695B (en) | 2020-07-17 | 2020-07-17 | Food detects with device of purification liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010689540.0A CN111896695B (en) | 2020-07-17 | 2020-07-17 | Food detects with device of purification liquid |
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| CN111896695A true CN111896695A (en) | 2020-11-06 |
| CN111896695B CN111896695B (en) | 2022-05-03 |
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|---|---|---|---|---|
| CN112816279A (en) * | 2020-12-21 | 2021-05-18 | 艾吉析科技(南京)有限公司 | Sample extraction and separation device for corn flour biotoxin detection |
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| CN111896695B (en) | 2022-05-03 |
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