CN113786872B - Food detection method and corresponding food detection test tube - Google Patents
Food detection method and corresponding food detection test tube Download PDFInfo
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- CN113786872B CN113786872B CN202111008953.9A CN202111008953A CN113786872B CN 113786872 B CN113786872 B CN 113786872B CN 202111008953 A CN202111008953 A CN 202111008953A CN 113786872 B CN113786872 B CN 113786872B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/508—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above
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Abstract
The invention discloses a food detection method and a corresponding test tube for food detection, wherein the test tube for food detection comprises a tube body, a tube plug, an end cover, a stirring device, a threaded nail and a spring; the pipe plug is detachably sealed at the top of the pipe body and is provided with a first cavity, and the first cavity is used for placing a reagent tank filled with detection liquid; the end cover is detachably connected to the top of the pipe plug; the stirring device is arranged in the pipe body, a sinking hole with an internal thread on the inner wall is arranged at the top of the stirring device, and the stirring device cannot move axially and only can do rotary motion; the screw thread is coaxial with the stirring device and is positioned in the end cover and the pipe plug, and the screw thread can penetrate through the first cavity from top to bottom and then is inserted into a sinking hole of the stirring device; the spring gives acting force to the screw nail to move to the side far away from the stirring device. During the use, pack into first cavity with the reagent jar after, press the screw and just can realize simultaneously adding the step that detects liquid and stirring in the body, two actions have been realized promptly to one step, it is very convenient.
Description
Technical Field
The invention relates to the field of food detection, in particular to a test tube used in food detection and a method for detecting food by using the test tube.
Background
The food detection process is generally carried out by adopting a chemical method, and the detection process is as follows:
firstly, putting a certain amount of a sample (solid) to be detected into a beaker, and then adding distilled water to soak for a certain time to obtain a sample treatment solution;
then, taking two test tubes to mark blank and sample, and then taking a certain amount of sample processing liquid to add into the blank test tube and the sample test tube;
then, adding a detection solution into the sample test tube, and then covering a cover to manually shake up the solution in the sample test tube;
and finally, pouring the solution in the control tube and the sample tube into a cuvette, and then, loading the cuvette on a machine for detection.
Wherein, in above-mentioned third step, the detection liquid that adds in to the sample test tube is added through the pipetting gun, and later shake even again through handheld sample test tube shake back and forth and realize, consequently can have following drawback: (1) the adding amount of the detection liquid may have deviation, the situation that the detection liquid drops on the outer wall of the test tube or the experiment table top may exist when the detection liquid is added, and the whole process is exposed in the air when the detection liquid is added, so that the detection result may be influenced by external factors; (2) when shaking evenly, the arm needs to swing back and forth, the process is time-consuming and labor-consuming, muscle soreness can be caused after long-term reciprocating, at present, although a special shaking evenly device (such as Chinese patents with publication numbers or publication numbers of CN112473493A and CN 207187633U) is provided, the device belongs to an independent device, the shaking evenly can be realized only after the test tube is fixed on the device, and the process is complicated.
Disclosure of Invention
The invention aims to improve the test tube used for food detection at present, so that two defects mentioned in the background technology are overcome.
In order to solve the above technical problem, in a first aspect, the present invention provides a test tube for food detection, including:
the tube body is a container with an opening at the top and is made of transparent materials;
the pipe plug is sealed at the top of the pipe body and can be separated from the pipe body, a first cavity is formed in the pipe plug and used for placing a reagent tank filled with detection liquid, a detachable first plate body is arranged at the bottom of the first cavity, a first through hole is formed in the middle of the first plate body, a second plate body is arranged at the top of the first cavity, and a second through hole is formed in the middle of the second plate body;
the end cover is detachably connected to the top of the pipe plug, and a second cavity is formed inside the end cover;
the stirring device is arranged in the inner cavity of the pipe body and extends along the direction of the central axis of the pipe body, and comprises a rotating shaft and stirring blades, wherein the top of the rotating shaft is provided with a sinking hole extending axially, and the inner wall of the lower sinking hole is provided with an internal thread; the movement of the stirring device relative to the pipe body along the axial direction is limited, but the rotation motion of the stirring device around the central axis of the stirring device is not limited;
the screw thread nail is coaxially arranged with the stirring device and comprises a cap body and a rod body, the cap body is positioned in the second cavity, the rod body is connected below the cap body, a section of external thread is arranged on the outer wall of the rod body from bottom to top, the external thread is matched with the internal thread in the sunken hole of the stirring device, and the screw thread matching of the screw thread nail and the stirring device can be realized;
the spring, the spring is right the screw thread nail endows to keeping away from the effort that agitating unit one side removed, and, when the spring was in free state, the first half of the body of rod was located the second cavity, and the latter half passes the second through-hole extend to in the first cavity.
Further, be provided with in the inner chamber of body and be used for the installation agitating unit's support piece, support piece is including the cover body and connect the connecting plate around the cover body, wherein, the inner wall of the cover body is provided with the round recess, the outer wall of agitating unit's pivot is provided with the round bulge loop, and this bulge loop embedding just keeps the clearance with the recess in the recess, one side that the cover body was kept away from to the connecting plate is connected with the inner wall of body.
Furthermore, the bottom of the rod body of the threaded nail is of a pointed structure.
Furthermore, the spring is sleeved on the periphery of the rod body of the threaded nail, the bottom of the spring abuts against the second plate body, and the top of the spring abuts against the cap body of the threaded nail.
Further, the test tube for food detection also comprises a pressing plate;
the wall surface of the end cover is provided with two strip-shaped openings which are arranged oppositely, and the side wall of each strip-shaped opening is provided with a strip-shaped groove;
the pressing plate comprises a cylinder, a first lug plate and a second lug plate, wherein the cylinder is positioned above the threaded nail in the second cavity, the first lug plate is connected with the side wall of the cylinder, the first lug plate extends into one of the strip-shaped openings, the second lug plate is arranged opposite to the first lug plate and is also connected with the side wall of the cylinder, and the second lug plate extends out of the end cover from the other strip-shaped opening and forms a pressing part outside the end cover; simultaneously, the lateral wall of first otic placode and second otic placode all be provided with bar groove assorted slider, and each slider all imbeds to corresponding bar groove in.
In another aspect, the present invention further provides a test tube kit for food detection, comprising a reagent tank and the above-mentioned test tube for food detection;
the reagent tank is of a cylindrical structure provided with a containing cavity, the containing cavity is used for allowing the rod body of the threaded nail to be placed in the containing cavity, the containing cavity is of a cylindrical structure, the containing cavity extends downwards from the middle of the top surface of the reagent tank along the axial direction, and the height of the containing cavity is between 3/5 and 4/5 of the height of the reagent tank; the reagent tank is characterized in that a third cavity is arranged inside the reagent tank and is formed by sealing a plastic shell and tinfoil, wherein the top and the bottom of the third cavity are respectively sealed by the tinfoil, and meanwhile, the third cavity is also sealed by the tinfoil at the position of the bottom of the accommodating cavity.
In another aspect, the present invention further provides a food detection method, which includes a process of adding the sample treatment solution and the detection solution into the tube body by using the test tube described in the first aspect, and then stirring the mixture, specifically as follows:
s1, taking down the plug of the test tube for food detection from the top of the tube body; after being taken down, the end cover is connected with the pipe plug;
s2, disassembling the first plate body of the pipe plug, then placing a reagent tank filled with detection liquid into the first cavity of the pipe plug, and then assembling the first plate body back to the bottom of the first cavity;
s3, adding a predetermined amount of sample treatment liquid into the tube body;
s4, sealing the pipe plug and the end cover back to the top of the pipe body;
s5, the test tube is held by hands, the tube body is located below, the tube plug and the end cover are located above, then the pressing part of the pressing plate is pressed by hands, the pressing plate moves downwards, the pressing plate is loosened when the pressing plate moves to the lowest point, and the pressing plate can automatically move upwards under the action of the spring; and then the actions of pressing and releasing the pressing plate are repeatedly executed in a circulating manner until the sample processing liquid and the detection liquid in the tube body are uniformly mixed.
Further, the reagent tank is of a cylindrical structure provided with a containing cavity, the containing cavity is used for allowing the rod body of the threaded nail to be placed in the containing cavity, the containing cavity is of a cylindrical structure, the containing cavity extends downwards from the middle of the top surface of the reagent tank along the axial direction, and the height of the containing cavity is between 3/5 and 4/5 of the height of the reagent tank; the reagent tank is characterized in that a third cavity is arranged inside the reagent tank and is formed by sealing a plastic shell and tinfoil, wherein the top and the bottom of the third cavity are respectively sealed by the tinfoil, and meanwhile, the third cavity is also sealed by the tinfoil at the position of the bottom of the accommodating cavity.
In step S2, when the reagent container is placed in the first cavity of the plug, the rod body of the screw nail needs to be inserted into the accommodating cavity of the reagent container.
The invention has the beneficial effects that:
(1) the detection liquid is stored in the reagent tank, and the reagent tank is placed in the pipe plug when the device is used, so that the detection liquid added into the test tube at each time is in a fixed amount, the condition of addition amount deviation is avoided, and the detection liquid directly flows down from the pipe plug at the top of the test tube, so that the condition that the detection liquid drops onto the outer wall of the test tube or an experiment table top is avoided, the condition that the adding process is exposed in the air and the detection result is influenced by external factors is avoided;
(2) when the screw nail or the pressing plate is pressed, the steps of adding the detection liquid and stirring the detection liquid can be simultaneously realized, so that two actions are realized in one step; when the screw nail or the pressing plate is pressed repeatedly subsequently, the detection liquid can be mixed more uniformly, and compared with the conventional mode of mixing by swinging the test tube back and forth, the mixing mode of the invention is much easier.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is an enlarged view of FIG. 1 within the dotted line;
FIG. 3 is a view taken along line A-A of FIG. 1;
FIG. 4 is an enlarged view of the plug and cap of FIG. 1;
FIG. 5 is a schematic illustration of the components of FIG. 1, shown disassembled;
FIG. 6 is a perspective view of a reagent vessel according to the present invention;
FIG. 7 is a schematic view of the screw in FIG. 1 after the end cap is removed and the screw is moved downward to pierce the tinfoil of the reagent can;
FIG. 8 is a schematic structural view of embodiment 2 of the present invention;
fig. 9 is a view from B-B of fig. 8.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced otherwise than as specifically described, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
The invention mainly aims to realize the purposes of adding quantitative detection liquid into a test tube in a closed environment and fully and uniformly mixing the detection liquid with a sample treatment liquid in the test tube when food detection is carried out.
Example 1:
referring to fig. 1 to 5, the present embodiment provides a test tube for food detection, which includes a tube body 1, a tube plug 2, an end cap 3, a stirring device 4, a screw 5, and a spring.
The tube body 1 is a container with an open top and a closed bottom, and the tube body 1 is made of transparent materials.
The pipe plug 2 can be sealed at the top of the pipe body 1 and can also be separated from the pipe body 1; the pipe plug 2 is internally provided with a first cavity 21, the first cavity 21 is used for placing a reagent tank b filled with a detection liquid b5, the bottom of the first cavity 21 is provided with a detachable first plate body 22, the middle part of the first plate body 22 is provided with a first through hole 221, the top of the first cavity 21 is provided with a second plate body 23, and the middle part of the second plate body 23 is provided with a second through hole 231.
The end cover 3 is connected to the top of the pipe plug 2 through threads, the top of the end cover 3 is closed, the bottom of the end cover is open, and a second cavity 31 is formed inside the end cover.
The stirring device 4 is arranged in the inner cavity of the pipe body 1; the stirring device 4 comprises a rotating shaft 41 and stirring blades 42, wherein the rotating shaft 41 extends along the direction of the central axis of the pipe body 1, the top of the rotating shaft 41 is provided with a sinking hole 411 which extends axially, the inner wall of the sinking hole 411 is provided with internal threads, and the stirring blades 42 are spirally surrounded and fixed on the outer wall of the rotating shaft 41; a supporting piece 7 for mounting the stirring device 4 is arranged in the inner cavity of the pipe body 1, the supporting piece 7 comprises a sleeve body 71 and a connecting plate 72 connected to the periphery of the sleeve body 71, wherein a circle of groove 611 is arranged on the inner wall of the sleeve body 71, a circle of convex ring 412 is arranged on the outer wall of the rotating shaft 41, the convex ring 412 is embedded in the groove 611 and keeps a gap with the groove 611 (see fig. 2 and 3), and one side of the connecting plate 72 away from the sleeve body 71 is fixed with the inner wall of the pipe body 1; accordingly, the movement of the stirring device 4 in the axial direction with respect to the pipe body 1 is restricted by the fitting relationship of the male ring 412 and the female groove 611, but the stirring device 4 is rotatable about its central axis because of the clearance between the male ring 412 and the female groove 611.
The screw 5 and the stirring device 4 are coaxially arranged, the screw 5 comprises a cap body 51 and a rod body 52, the cap body 51 is positioned in the second cavity 31, the rod body 52 is connected below the cap body 51, the bottom of the rod body 52 is of a pointed structure, a section of external thread is arranged on the outer wall of the rod body 52 from bottom to top above the pointed structure, the external thread is matched with the internal thread in the sinking hole 411 of the stirring device 4, and the screw 5 and the stirring device 4 can be in threaded fit; moreover, when the pipe plug 2 is sealed at the top of the pipe body 1, when the screw 5 moves downward, the rod 52 of the screw 5 can be inserted into the sunken hole 411 at the top of the rotating shaft 41, and since the external thread at the bottom of the rod 52 is matched with the internal thread in the sunken hole 411, when the rod 52 is inserted into the sunken hole 411, the matching relationship of the threads will drive the stirring device 4 to rotate, and then, when the rod 52 is separated from the sunken hole 411 (i.e. the rod 52 moves upward relative to the sunken hole 411), the matching relationship of the threads will drive the stirring device 4 to rotate reversely.
The spring 6 cup joints the periphery of the rod body 52 of the screw nail 5, and the bottom of the spring 6 is fixed with the second plate body 23, the top is fixed with the cap body 51 of the screw nail 5, the spring 6 gives the screw nail 5 the acting force for moving away from one side of the stirring device 4, and when the spring 6 is in a free state, the upper half part of the rod body 52 is located in the second cavity 31, and the lower half part passes through the second through hole 231 and extends into the first cavity 21.
Wherein, the connected mode of stopcock 2 and body 1 can be threaded connection, also can be connected through interference fit's mode, can also be connected through the mode that snap ring and draw-in groove mutually supported, uses the mode that third kind snap ring and draw-in groove mutually supported in the picture as the example, and such connected mode can realize the quick of stopcock 2 and pull out to insert. In addition, the first plate 22 is disposed at the bottom of the first cavity 21 in a threaded connection manner, and the first through hole 221 in the middle of the first plate 22 is a regular hexagon, so that an allen wrench can be inserted into the first through hole to disassemble and assemble the first plate 22.
In the above structure, the purpose of inserting the lower half part of the rod 52 into the first cavity 21 is: when the stirring device 4 is used, the rod body 52 moves downwards and is inserted into the sunken hole 411 of the rotating shaft 41 to drive the stirring device 4 to rotate to achieve the stirring purpose, so that if the rod body 52 is not inserted into the first cavity 21 in advance, the rod body 52 moves downwards to penetrate through the first cavity 21 and then is inserted into the lower counter bore 411, the rod body 52 is longer in design size, and if the rod body 52 is too long, the stability of the rod body in moving is insufficient and the rod body is easy to swing, and in addition, the height of the end cover 3 is designed to be higher so as to completely wrap the screw nails 5 in the end cover 3, so that the end cover 3 and the pipe body 1 are in an out-of-proportion condition in appearance; accordingly, the applicant inserts the rod 52 into the first cavity 21 in advance, so that the stroke of the rod 52 moving downwards is shortened, and therefore the length of the rod 52 can be designed to be shorter, so that the stability during moving is better, and the end cover 3 is not too high.
The method for detecting the food by using the embodiment and the working principle are as follows:
s1, taking the pipe plug 2 down from the top of the pipe body 1; after being taken down, the end cover 3 is connected with the pipe plug 2;
s2, detaching the first plate 22 of the tube plug 2, then placing the reagent tank b filled with the detection liquid b5 into the first cavity 21 of the tube plug 2, and then installing the first plate 22 back to the bottom of the first cavity 21;
s3, adding a predetermined amount of sample treatment liquid c into the tube body 1;
s4, sealing the pipe plug 2 and the end cover 3 to the top of the return pipe body 1;
s5, the test tube is held by hand, the tube body 1 is located below, the tube plug 2 and the end cover 3 are located above, then the end cover 3 is detached, then the cap body 51 of the screw nail 5 is pressed by hand, the screw nail 5 moves downwards, the hand is loosened after the screw nail 5 moves to the lowest point, and at the moment, the screw nail 5 automatically moves upwards under the action of the spring 6; then, repeatedly pressing the cap body 51 and loosening the cap body 51 in a circulating manner until the sample processing liquid c in the tube body 1 and the detection liquid b5 are uniformly mixed;
in step S5, when the screw 5 moves downward, the screw penetrates the reagent tank b from top to bottom, so that the detection liquid b5 in the reagent tank b flows out, the flowing-out detection liquid b5 passes through the second through hole 221 of the second plate 22, and then flows into the lower pipe 1 to mix with the sample processing liquid c in the pipe 1, and then, as the screw 5 moves downward, the rod 52 of the screw 5 is inserted into the sinking hole 411 of the rotating shaft 41, and since the external thread of the rod 52 is matched with the internal thread of the sinking hole 411, the rod 52 drives the rotating shaft 41 to rotate, and the stirring blade 42 of the stirring device 4 also rotates in the pipe 1, thereby achieving the purpose of uniformly stirring and mixing, see fig. 7; after the hand is loosened, the screw 5 moves upwards under the action of the spring 6, and the rod body 52 drives the rotating shaft 41 to rotate reversely, so that the stirring device 4 rotates back and forth in the tube body 1 in the process of circularly and repeatedly pressing and loosening the cap body 51, and the detection liquid b5 and the sample processing liquid c can be fully mixed.
Example 2:
this example is modified from example 1 as follows:
the test tube for food detection of the present embodiment further includes a pressure plate 8;
referring to fig. 8 and 9, two strip-shaped openings 32 arranged oppositely are formed in the wall surface of the end cover 3, and a strip-shaped groove 33 is formed in the side wall of each strip-shaped opening 32; the pressing plate 8 is inserted into the two strip-shaped openings 32 of the end cover 3, the pressing plate 8 is positioned below the top surface of the end cover 3, and the highest point of upward movement of the pressing plate 8 is limited by the top surface; the pressing plate 8 comprises a cylinder 81, a first ear plate 82 and a second ear plate 83, wherein the cylinder 81 is located above the screw nail 5 in the second cavity 31, the first ear plate 82 is connected with the side wall of the cylinder 81, the first ear plate 82 extends into one of the strip-shaped openings 32, the second ear plate 83 is arranged opposite to the first ear plate 82 and is also connected with the side wall of the cylinder 81, and the second ear plate 83 extends out of the end cap 3 from the other strip-shaped opening 32 and forms a pressing part 831 outside the end cap 3; meanwhile, the side walls of the first lug plate 82 and the second lug plate 83 are provided with sliders 84 matched with the strip-shaped grooves 33, and each slider 84 is embedded into the corresponding strip-shaped groove 33, see fig. 9.
The method for food detection using this example differs from example 1 in that:
in step S5, the pressing portion 831 of the pressing plate 8 is directly pressed by hand without detaching the end cap 3, when pressed, the pressing plate 8 moves downward to push the screw 5 to move downward together, and when the pressing plate 8 moves to the lowest point, the pressing plate 8 is released, and at this time, the screw 5 moves upward by itself under the action of the spring 6, and the pressing plate 8 is further pushed to move upward, and then the actions of pressing the pressing plate 8 and releasing the pressing plate 8 are repeatedly performed until the sample processing liquid in the tube 1 and the detection liquid are uniformly mixed.
The advantages of this embodiment over embodiment 1 are: the pressing part 831 of the pressing plate 8 can be directly pressed without detaching the end cover 3, so the operation is simpler and the use is more convenient.
Example 3:
the present embodiment is a test tube kit for food detection, which further includes a reagent tank b on the basis of embodiment 1 or embodiment 2, and the specific structure of the reagent tank b is as follows:
referring to fig. 5 and 6, the reagent tank b is a cylindrical structure provided with a containing cavity b2, the containing cavity b2 is used for allowing the rod body 52 of the screw nail 5 to be placed in the containing cavity b2, the containing cavity b2 is a cylindrical structure, the height of the containing cavity b2 is between 3/5 and 4/5 of the height of the reagent tank b, and the axial direction of the containing cavity b2 is the same as the axial direction of the rod body; the inside of the reagent tank b is a third cavity b1, the third cavity b1 is formed by sealing a plastic shell b3 and tinfoil b4, wherein the top and the bottom of the third cavity b1 are both sealed by tinfoil b4, and meanwhile, at the position of the bottom of the accommodating cavity b2, the third cavity b1 is also sealed by tinfoil b4, see fig. 5.
When the reagent pot b is put into the first cavity 21 of the pipe plug 2, the rod body 52 of the screw nail 5 is inserted into the containing cavity b2 of the reagent pot b; when the screw nail 5 moves downwards, the pointed structure at the bottom of the rod body 52 pierces the tinfoil b4 at the bottom of the accommodating cavity b2 and the bottom of the reagent tank b, so that the detection liquid b5 in the reagent tank b can flow out.
For a test tube manufacturer, the reagent tank b can be of various types, and different detection liquids b are filled in each type and are respectively used for different detection tests. For the customer who purchases the reagent kit b to be subjected to the food testing, the corresponding reagent kit b may be purchased according to the object of the testing. Reagent jar b is the consumables, and the customer can purchase a certain amount of reagent jar b in advance, and at every turn when detecting, it can to get one corresponding reagent jar b and pack into the first cavity 21 of body 2.
Based on the above embodiments, the present invention has the following beneficial effects:
(1) because the detection liquid b5 is stored in the reagent tank b, and the reagent tank b is placed in the tube plug 2 when in use, the detection liquid added into the test tube at each time is a fixed amount, the condition of addition amount deviation cannot exist, and the detection liquid directly flows down from the tube plug 2 at the top of the test tube, so the condition that the detection liquid drops on the outer wall of the test tube or the experiment table top cannot occur, the condition that the adding process is exposed in the air, and the detection result is influenced by external factors cannot occur;
(2) when the screw 5 or the pressing plate 8 is pressed, the steps of adding the detection liquid and stirring the detection liquid can be simultaneously realized, so that two actions are realized in one step; when the screw nail 5 or the pressing plate 8 is pressed repeatedly, the detection liquid can be mixed more uniformly, and compared with the conventional mode of mixing by swinging the test tube back and forth, the mixing mode of the invention is much easier.
In the description of the present invention, the terms "connect", "mount", "fix", etc. should be interpreted broadly, for example, the term "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. Food detects uses test tube, its characterized in that includes:
the pipe body (1) is a container with an opening at the top and is made of transparent materials;
the pipe plug (2) is sealed at the top of the pipe body (1) and can be separated from the pipe body (1), a first cavity (21) is formed inside the pipe plug (2), the first cavity (21) is used for placing a reagent tank (b) filled with detection liquid (b 5), a detachable first plate body (22) is arranged at the bottom of the first cavity (21), a first through hole (221) is formed in the middle of the first plate body (22), a second plate body (23) is arranged at the top of the first cavity (21), and a second through hole (231) is formed in the middle of the second plate body (23);
the end cover (3), the end cover (3) is detachably connected to the top of the pipe plug (2), and a second cavity (31) is formed inside the end cover (3);
the stirring device (4) is arranged in the inner cavity of the pipe body (1) and extends along the direction of the central axis of the pipe body (1), the stirring device (4) comprises a rotating shaft (41) and stirring blades (42), wherein a sinking hole (411) extending axially is formed in the top of the rotating shaft (41), and an internal thread is formed in the inner wall of the sinking hole (411); the stirring device (4) is limited to move along the axial direction relative to the pipe body (1), but the rotation motion of the stirring device (4) around the central axis of the stirring device is not limited;
the screw (5) and the stirring device (4) are coaxially arranged, the screw (5) comprises a cap body (51) and a rod body (52), the cap body (51) is located in the second cavity (31), the rod body (52) is connected to the lower portion of the cap body (51), a section of external thread is arranged on the outer wall of the rod body (52) from bottom to top, the external thread is matched with an internal thread in a lower counter bore (411) of the stirring device (4), and the screw (5) and the stirring device (4) can be in threaded fit;
a spring (6), wherein the spring (6) applies acting force to the screw thread nail (5) to move towards the side far away from the stirring device (4), and when the spring (6) is in a free state, the upper half part of the rod body (52) is positioned in the second cavity (31), and the lower half part of the rod body extends into the first cavity (21) through the second through hole (231);
when the reagent tank (b) is placed in the first cavity (21), the screw (5) penetrates through the whole reagent tank (b) from top to bottom in the process of moving downwards from the natural state, so that the detection liquid (b 5) in the reagent tank (b) flows into the pipe body (1) below, the lower part of the rod body (52) can be inserted into the lower counter bore (411) when the rod body (52) moves downwards continuously, and the rod body (52) drives the rotating shaft (41) to rotate by means of the matching relationship between the external thread of the rod body and the internal thread of the lower counter bore (411) during the insertion process.
2. The food detection test tube according to claim 1, wherein a support member (7) for mounting the stirring device (4) is arranged in the inner cavity of the tube body (1), the support member (7) comprises a sleeve body (71) and a connecting plate (72) connected around the sleeve body (71), wherein a circle of groove (611) is arranged on the inner wall of the sleeve body (71), a circle of convex ring (412) is arranged on the outer wall of the rotating shaft (41) of the stirring device (4), the convex ring (412) is embedded in the groove (611) and keeps a gap with the groove (611), and the side of the connecting plate (72) away from the sleeve body (71) is connected with the inner wall of the tube body (1).
3. The food test tube according to claim 1, wherein the bottom of the rod body (52) of the screw (5) is a pointed structure.
4. The food detection test tube according to claim 1, wherein the spring (6) is sleeved on the periphery of the rod body (52) of the screw nail (5), the bottom of the spring (6) abuts against the second plate body (23), and the top of the spring abuts against the cap body (51) of the screw nail (5).
5. The food test tube according to claim 1, further comprising a pressure plate (8);
the wall surface of the end cover (3) is provided with two strip-shaped openings (32) which are arranged oppositely, and the side wall of each strip-shaped opening (32) is provided with a strip-shaped groove (33);
the pressing plate (8) comprises a cylinder (81), a first lug plate (82) and a second lug plate (83), wherein the cylinder (81) is positioned above the threaded nail (5) in the second cavity (31), the first lug plate (82) is connected with the side wall of the cylinder (81), the first lug plate (82) extends into one of the strip-shaped openings (32), the second lug plate (83) is opposite to the first lug plate (82) and is also connected with the side wall of the cylinder (81), and the second lug plate (83) extends from the other strip-shaped opening (32) to the outside of the end cover (3) and forms a pressing part (831) outside the end cover (3); simultaneously, the lateral wall of first otic placode (82) and second otic placode (83) all be provided with bar groove (33) assorted slider (84), and each slider (84) all imbeds to corresponding bar groove (33) in.
6. A test tube kit for food detection, comprising a reagent vessel (b) and the test tube for food detection according to any one of claims 1 to 5;
wherein, the reagent tank (b) is a cylinder structure provided with a containing cavity (b 2), the containing cavity (b 2) is used for allowing the rod body (52) of the screw nail (5) to be placed in the containing cavity, the containing cavity (b 2) is a cylinder structure, the middle part of the top surface of the reagent tank (b) extends downwards along the axial direction, and the height is between 3/5 and 4/5 of the height of the reagent tank (b); the reagent tank (b) is internally provided with a third cavity (b 1), the third cavity (b 1) is formed by closing a plastic shell (b 3) and tinfoil (b 4), wherein the top and the bottom of the third cavity (b 1) are both closed by tinfoil (b 4), and meanwhile, the third cavity (b 1) is also closed by tinfoil (b 4) at the position of the bottom of the accommodating cavity (b 2).
7. A method for testing food, comprising the steps of adding a sample treatment solution and a test solution into a tube body (1) of a test tube according to claim 5, and then stirring the mixture, wherein the steps are as follows:
s1, removing the plug (2) of the food detection test tube according to claim 5 from the top of the tube body (1); after being taken down, the end cover (3) is connected with the pipe plug (2);
s2, disassembling the first plate body (22) of the pipe plug (2), then placing a reagent tank (b) filled with a detection liquid (b 5) into the first cavity (21) of the pipe plug (2), and then putting the first plate body (22) back to the bottom of the first cavity (21);
s3, adding a predetermined amount of sample processing liquid into the tube body (1);
s4, sealing the pipe plug (2) and the end cover (3) back to the top of the pipe body (1);
s5, the test tube is held by hands, the tube body (1) is located below, the tube plug (2) and the end cover (3) are located above, then the pressing portion (831) of the pressing plate (8) is pressed by hands, the pressing plate (8) moves downwards, the pressing plate (8) is released when the pressing plate (8) moves to the lowest point, and at the moment, the pressing plate (8) can automatically move upwards under the action of the spring (6); then, the actions of pressing the pressing plate (8) and releasing the pressing plate (8) are circularly and repeatedly executed until the sample processing liquid and the detection liquid in the tube body (1) are uniformly mixed;
in the step S5, in the process of first downward movement of the pressing plate (8), the rod body (52) of the screw nail (5) pierces the whole reagent tank (b) from top to bottom, so that the detection liquid (b 5) in the reagent tank (b) flows into the tube body (1) below, and then the lower portion of the rod body (52) is inserted into the lower counter bore (411) when the rod body (52) continues to move downward, and in the process of insertion, the rod body (52) drives the rotating shaft (41) to rotate by means of the matching relationship between the external threads of the rod body and the internal threads of the lower counter bore (411); then, in the process that the pressure plate (8) moves upwards, the rod body (52) moving upwards drives the rotating shaft (41) to rotate reversely by virtue of the matching relation between the external thread of the rod body and the internal thread of the lower counter bore (411).
8. A food detection method according to claim 7, wherein the reagent tank (b) is a cylindrical structure provided with a receiving cavity (b 2), the receiving cavity (b 2) is used for allowing the rod body (52) of the screw nail (5) to be placed therein, the receiving cavity (b 2) is a cylindrical structure which extends downwards along the axial direction from the middle part of the top surface of the reagent tank (b) and has a height between 3/5 and 4/5 of the height of the reagent tank (b); the reagent tank (b) is internally provided with a third cavity (b 1), the third cavity (b 1) is formed by closing a plastic shell (b 3) and tinfoil (b 5), wherein the top and the bottom of the third cavity (b 1) are both closed by tinfoil (b 5), and meanwhile, the third cavity (b 1) is also closed by tinfoil (b 5) at the position of the bottom of the accommodating cavity (b 2);
in step S2, when the reagent container (b) is placed in the first cavity (21) of the stopcock (2), the rod (52) of the screw (5) needs to be inserted into the accommodating cavity (b 2) of the reagent container (b).
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