CN-122016438-A - Food sample preprocessing device for food safety detection

Abstract

The invention discloses a food sample pretreatment device for food safety detection, which is characterized in that a center support column and an execution assembly are sequentially arranged on the surface of a base from bottom to top, a cooling assembly is arranged in the execution assembly, a mounting plate is arranged on the center support column, a plurality of homogenizing cutter units are arranged on the mounting plate, and a centrifugal assembly is arranged on the outer side wall of the center support column. According to the invention, through arranging the homogenizing cutter unit, the maintenance operation can be simplified and the universality can be improved by manually installing and detaching the homogenizing cutter unit in a simple clamping manner, and through arranging the sample frame assembly, the sample frame assembly keeps the sample treatment bin vertical by gravity when being stationary, so that the sample treatment bin is convenient to take and place, and when in centrifugation, the sample treatment bin is automatically unfolded to a preset angle by virtue of centrifugal force, the separation effect is optimized, and the sample treatment bin can be automatically reset after stopping working.

Inventors

• ZANG QIANG
• SUN JUNFENG
• TIAN YE
• FANG QIAN
• HAN GUOFENG
• DUAN ENZE
• WANG HUIXIN
• BAI ZONGCHUN

Assignees

• 南京信息工程大学
• 淄博市张店区疾病预防控制中心
• 江苏省农业科学院

Dates

Publication Date

20260512

Application Date

20260408

Claims (8)

1. 1. A food sample pretreatment device for food safety detection is characterized by comprising a center support column (4), a mounting plate (5), a driving plate (8) and a homogenizing cutter unit arranged on the mounting plate (5), wherein the mounting plate (5) is fixed on the upper side surface of the center support column (4), an electric pushing cylinder (7) is arranged in the center support column (4) and used for controlling the driving plate (8) to lift, the driving plate (8) comprises a transmission joint (9) used for driving the homogenizing cutter unit to rotate, a butt joint tenon (15) is arranged at the bottom of the transmission joint (9), the butt joint tenon (15) and a butt joint mortise (21) at the top of the homogenizing cutter unit form a self-centering structure, when the electric pushing cylinder (7) drives the driving plate (8) to push down, the butt joint tenon (15) and the butt joint mortise (21) are in power butt joint, and when the electric pushing cylinder (7) drives the driving plate (8) to lift, the butt joint tenon (15) and the butt joint mortise (21) are separated.
2. 2. The food sample pretreatment device for food safety detection according to claim 1, further comprising a centrifugal assembly, wherein a rotating sleeve (11) of the centrifugal assembly is arranged on the outer side of the central support column (4), a sample rack assembly is arranged on the rotating sleeve (11) and used for placing a sample treatment bin (2), the sample rack assembly comprises a mounting plate (17) and a sample fixing rack (18), the top of the sample fixing rack (18) is rotationally connected with the mounting plate (17), the bottom of the sample fixing rack is movably connected with the mounting plate (17) through a connecting rod group (19), the sample fixing rack (18) is kept in a vertical folding posture under the action of gravity in a static state, and the sample fixing rack (18) is unfolded through centrifugal force in the centrifugal process, so that the sample treatment bin (2) is inclined.
3. 3. Food sample pretreatment device for food safety detection according to claim 1, characterized in that it further comprises a cooling assembly, the inlet end of the shunt tube (24) of which is in communication with the cryogenic nitrogen source, and the outlet end of which is provided with an extension tube (25), the extension tube (25) extending into the cooling channel (22) of the homogenizer knife unit after passing through the transmission joint (9).
4. 4. The food sample pretreatment device for food safety detection according to claim 1, characterized in that the homogenizing cutter unit comprises an outer cutter head (12) and an inner cutter head (13), the outer cutter head (12) is hollow, a hexagonal positioning ring (20) is sleeved on the outer side wall of the outer cutter head (12), a bearing is arranged in the positioning ring (20), the positioning ring (20) is clamped with a clamping groove (6) of the mounting disc (5), a screw hole is formed in the outer side wall of the outer cutter head (12), and a butt joint mortise (21) is formed in the top of the outer cutter head (12).
5. 5. The food sample pretreatment apparatus for food safety inspection according to claim 4, wherein a cooling channel (22) is provided in the inner cutter head (13), the inner cutter head (13) is connected with the outer cutter head (12) through a fixing seat (23), and a cooling nozzle (2201) is provided at the bottom of the outer sidewall of the inner cutter head (13) for cooling the inner cutter head (13) and the sample.
6. 6. Food sample pretreatment device for food safety detection according to claim 1, characterized in that the drive disc (8) further comprises a drive gear (10), the drive joint (9) being in meshed connection with the drive gear (10) via a toothed ring (14).
7. 7. Food sample pretreatment device for food safety detection according to claim 2, characterized in that the revolute pair of the linkage (19) is provided with a limit stop (1901), and the linkage (19) is unfolded to a preset angle under the action of centrifugal force.
8. 8. Food sample pretreatment device for food safety detection according to claim 2, characterized in that the rotating sleeve (11) is mounted on the central support (4) by means of bearings, the bottom of the rotating sleeve (11) is provided with a hollow synchronizing wheel, which is connected with the centrifugal motor by means of a synchronizing belt.

Description

Food sample preprocessing device for food safety detection Technical Field The invention relates to the field of food detection equipment, in particular to a food sample pretreatment device for food safety detection. Background In the process of food safety detection, sample pretreatment is a key link for ensuring accurate detection results, wherein homogenization and centrifugal separation are two most commonly used pretreatment means, the homogenization aims at converting a food sample into uniform slurry, releasing and uniformly distributing target components to be detected, the centrifugation aims at separating homogenized mixed liquid according to density difference to obtain clarified supernatant for subsequent analysis, and the pretreatment operation commonly adopted in the laboratory at present is to crush and homogenize materials in a sample treatment bin by using a proper inner cutter head on a homogenizer, then manually opening a container and moving the container to a centrifuge for centrifugation. Most of the existing homogenizing equipment is provided with a fixed cutter head, when food samples of different types are continuously processed, the cutter head is required to be detached and installed by frequently using tools, the process is complicated, after the homogenizing process is finished, the samples are required to be transferred to the centrifugal equipment, the total processing time is prolonged, and the detection flux is reduced. In the high-speed homogenizing process, heat is generated by friction between the inner cutter head and the sample, so that the temperature of the sample is increased, and a target object to be detected (such as vitamins, specific microorganisms, enzymes and the like) with unstable heat can be degraded or deactivated, thereby influencing the detection result. Disclosure of Invention The invention aims to provide the food sample pretreatment device which solves the problems that the food sample pretreatment device in the prior art is single in function, the cutter head is complicated to replace and the friction heat can damage the activity of a sample. The food sample pretreatment device for food safety detection comprises a center support column, a mounting disc, a driving disc and a homogenizing cutter unit arranged on the mounting disc, wherein the mounting disc is fixed on the upper side face of the center support column, an electric pushing cylinder is arranged in the center support column and used for controlling the driving disc to lift, the driving disc comprises a transmission joint used for driving the homogenizing cutter unit to rotate, a butt joint tenon is arranged at the bottom of the transmission joint, the butt joint tenon and a butt joint mortise on the top of the homogenizing cutter unit form a self-centering structure, when the electric pushing cylinder drives the driving disc to press down, the butt joint tenon and the butt joint mortise are in power butt joint, and when the electric pushing cylinder drives the driving disc to lift, the butt joint tenon and the butt joint mortise are separated. Further, the food sample pretreatment device for food safety detection further comprises a centrifugal component, a rotating sleeve of the centrifugal component is arranged on the outer side of the central support, a sample frame component is arranged on the rotating sleeve and used for placing a sample treatment bin, the sample frame component comprises a mounting plate and a sample fixing frame, the top of the sample fixing frame is rotationally connected with the mounting plate, the bottom of the sample fixing frame is movably connected with the mounting plate through a connecting rod group, the sample fixing frame is kept in a vertical furling posture under the static state under the action of gravity, and the sample fixing frame is unfolded through centrifugal force in the centrifugal process, so that the sample treatment bin is inclined. Further, the food sample pretreatment device for food safety detection further comprises a cooling assembly, wherein the input end of the shunt pipe of the cooling assembly is communicated with a low-temperature nitrogen source, an extension pipe is arranged at the output end of the shunt pipe, and the extension pipe extends into a cooling channel of the homogenizing cutter unit after passing through the transmission joint. Further, the homogeneity sword unit includes outer tool bit and interior tool bit, and outer tool bit is the cavity setting, and the lateral wall cover of outer tool bit is equipped with hexagonal holding ring, is equipped with the bearing in the holding ring, and the draw-in groove joint of holding ring and mounting disc, and the screw has been seted up to the lateral wall of outer tool bit, and outer tool bit top is equipped with the butt joint mortise. Further, be equipped with cooling channel in the interior tool bit, interior tool bit passes through the fixing base and is connected with