CN114100780A - Sample grinding equipment for food safety detection and detection method thereof - Google Patents

Abstract

The invention provides sample grinding equipment for food safety detection and a detection method thereof, and relates to the field of food safety inspection, the sample grinding equipment comprises a grinding cavity, a grinding disc is fixedly connected in the grinding cavity, a rotary disc is rotatably connected in the middle of the grinding disc, a plurality of connecting rods which are in an annular array by taking the axis of the rotary disc as the center are rotatably connected on the rotary disc, the outer ends of the connecting rods are fixedly connected with ball sleeves, the ball sleeves are rotatably connected with grinding balls on the grinding disc, the connecting rods are rotatably connected with the upper side of the rotary disc through pins, compression springs are connected between the connecting rods and the rotary disc, the upper sides of the connecting rods are abutted against a pressure plate, the pressure plate is connected with a piston rod of a compression cylinder through a compression rod, the side surface of the grinding cavity is connected with a feeding hopper, a shearing mechanism is arranged in the feeding hopper, and a cleaning mechanism is connected with the side surface of the feeding hopper, in the invention, the grinding balls realize rolling grinding of different directions on materials in the grinding disc, the grinding efficiency and the grinding precision are improved.

Description

Sample grinding equipment for food safety detection and detection method thereof

Technical Field

The invention relates to the field of food safety inspection, in particular to sample grinding equipment for food safety inspection and a detection method thereof.

Background

The prospect of food safety industry. At present, the food safety industry faces a rapid development opportunity. Firstly, food safety is a focus of attention, and from the experience of developed countries and regions, food safety problems are likely to occur when urbanization reaches a certain degree, and in recent years, numerous food safety incidents occur in China, which causes high attention of people, and provides a chance for the development of the food safety industry, and secondly, the development of the food safety industry has a favorable international environment, and food safety is a worldwide problem.

The detection of food is the best supervision means, and in order to promote the efficiency that detects, people have produced food detection equipment, but the testing process is loaded down with trivial details, in order to make the detection high efficiency, adopts the preliminary treatment usually, and traditional solid food preprocessing device is because broken grinding flow separately goes on, causes processing to consume a long time to adaptability is poor, can not carry out preliminary treatment adjustment according to the food of difference and adjust

The patent No. CN107796680B discloses a pretreatment device for solid food detection, comprising a bottom plate, a support plate, a first motor of a treatment cylinder, a first threaded rod, a counterweight ball, a second threaded rod, a movable block, a pull rope, a screen, a ring, a first rotating shaft, a second rotating shaft, a first gear, a second gear, a crushing blade, a second motor, a grinding body, a grinding shell and an electric push rod, wherein the pretreatment device is provided with the second motor, the first rotating shaft, the second rotating shaft, the grinding body, the grinding shell and the electric push rod, the grinding and grinding are carried out simultaneously, the working efficiency is improved, the distance between the grinding shell and the grinding body is adjusted through the electric push rod, the grinding thickness degree is further adjusted, the requirements of different solid foods are met, the pretreatment device is strong in applicability, is provided with the second threaded rod, the movable block, the pull rope, the ring and the screen, the mesh size of the screen is changed through matching, the solid foods with different particle sizes are screened out according to requirements, the operation is simple, convenient and practical.

However, in the prior art, the grinding efficiency is low and the particle size is large by adopting a one-way rolling grinding mode, so that the detection efficiency and the detection accuracy are influenced.

Disclosure of Invention

The invention aims to provide a sample grinding device for food safety detection and a detection method thereof, so as to solve the technical problems.

In order to solve the technical problems, the invention adopts the following technical scheme: a sample grinding device for food safety inspection, including grinding the chamber, grind intracavity fixedly connected with abrasive disc, the abrasive disc middle part is rotated and is connected with the carousel, it is a plurality of connecting rods that are the annular array as the center to rotate on the carousel to be connected with the carousel axis, connecting rod outer end fixed connection ball cover, the ball cover rotates with the grinding ball on the abrasive disc to be connected, the connecting rod rotates through round pin post and carousel upside to be connected, is connected with compression spring between connecting rod and the carousel, the connecting rod top is inconsistent with the pressure disk, the pressure disk passes through the depression bar and is connected with the piston rod that compresses tightly the cylinder, it is connected with the feeding funnel to grind the chamber side, be provided with in the feeding funnel and cut mechanism, cleaning mechanism is connected to the feeding funnel side, and dry mechanism is connected to the feeding funnel opposite side, the carousel below is provided with thoughtlessly appearance mechanism.

Preferably, the abrasive disc includes the hollow ring of half section, the annular track outside that the hollow ring of half section formed is fixed with the convex arc face that is the annular array, and the hollow ring of half section is provided with the through-hole, the through-hole has a plurality of and evenly distributed on the abrasive disc, the hollow ring inboard of half section is connected with the fixed disk rotation.

Preferably, fixedly connected with sealed hemisphere on the fixed disk, sealed hemisphere side is provided with annular array's spout, the connecting rod run through the spout and with spout sliding connection, fixedly connected with and sealed hemisphere outside laminating sliding connection's sealed sphere panel on the connecting rod.

Preferably, the ball sleeve comprises a sleeve plate fixedly connected with the telescopic rod, two side plates are fixedly connected to two ends of the bottom side of the sleeve plate, the inner sides of the sleeve plate and the side plates are both concave spherical surfaces, and the connecting rod is a telescopic rod.

Preferably, the feeding hopper is communicated with the part, located above the grinding disc, of the grinding cavity through a feeding pipe, the shearing mechanism comprises a cutter arranged in the feeding hopper, and the cutter comprises an upper cutter disc and a lower cutter disc which are attached to each other.

Preferably, the upper cutter disc and the lower cutter disc respectively comprise a plurality of transverse cutting blades in an annular array, and longitudinal cutting blades are arranged on the bottom side of the upper cutter disc and the upper side of the lower cutter disc in a staggered mode.

Preferably, the longitudinal cutting blades are arc-shaped, and the longitudinal cutting blades are in a linear array along the length direction of the transverse cutting blades.

Preferably, clearance mechanism is including connecting in the water pipe of feeding funnel side, water pipe and water storage box intercommunication, the water storage box top is connected with the water supply cylinder, the piston rod of water supply cylinder and water storage box sliding connection's clamp plate fixed connection, the water pipe runs through the feeding funnel and extends to the feeding funnel inboard.

Preferably, the sample mixing mechanism comprises a stirring shaft which is positioned below the grinding disc and is rotationally connected with the grinding cavity, the stirring shaft is coaxially and fixedly connected with an output shaft of a motor fixed at the bottom end of the grinding cavity, a sample discharge port is formed in the bottom of the side face of the grinding cavity, and the top end of the stirring shaft is fixedly connected with the center of the grinding disc.

The detection method of the sample grinding device for food safety detection is characterized in that: the method comprises the following steps:

s1, placing food to be detected into a feeding hopper, cutting a large detection sample into small blocks by a cutting mechanism, and feeding the small blocks into a grinding cavity through a feeding pipe;

s2, the material entering the grinding cavity falls on a grinding disc, at the moment, grinding balls rotatably connected above the grinding disc are pressed downwards under the action of a pressure plate and are driven to rotate by an external motor, so that the grinding balls continuously grind the material on the grinding disc, and the material on the grinding disc falls below the grinding disc from the grinding disc after being ground into particles;

s3, the materials entering the lower part of the grinding disc are fully and uniformly mixed under the driving of the sample mixing mechanism, and then the mixed sample is taken for detection;

and S4, after the single sample detection is finished, cleaning the feeding hopper and the grinding cavity by the cleaning mechanism to ensure that internal substances are emptied so as to ensure the accuracy of the next detection.

The invention has the beneficial effects that:

1. the grinding disc is fixedly connected in the grinding cavity, the center of the grinding disc is rotatably connected with the rotary disc, a sample in the grinding cavity is ground by connecting the rotary disc with the grinding ball, the grinding pressure can be adjusted by adjusting the pressure of the pressure disc to the connecting rod through the pressing cylinder in the grinding process, the grinding strength is adjusted according to samples with different hardness, and the grinding efficiency is improved;

2. the connecting rod is arranged as a telescopic rod, the grinding balls are pressed by the convex arc surface through the contact of the grinding balls and the convex arc surface in the grinding disc, so that the connecting rod is stretched and contracted, and the grinding balls are driven by the telescopic rod to roll along the diameter of the grinding disc in the process of rotating by taking the axis of the grinding disc as a center, so that the grinding balls roll and grind materials in the grinding disc in different directions, and the grinding efficiency and the grinding precision are improved;

3. the feeding hopper is rotationally connected with a cutter with a transverse cutter blade and a longitudinal cutter blade, and the transverse cutter blade and the longitudinal cutter blade rotate relatively to cut a large sample into relatively small particles, so that the sample is convenient to grind, and the feeding hopper is more convenient to use compared with the existing manual chopping mode;

4. connect clearance mechanism in the upper hopper side, through the water in the water supply cylinder drive pressure plate oppression cistern in the clearance mechanism, can wash hopper, grinding chamber, avoid detecting influence each other many times, set up the (mixing) shaft bottom the grinding pan for the sample intensive mixing after will grinding, with the homogeneity that improves the sample, improve and detect the precision.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of a grinding chamber of the present invention;

FIG. 3 is a schematic perspective view of the platen and link of the present invention;

FIG. 4 is a cross-sectional view of a sealed hemisphere of the present invention;

FIG. 5 is a cross-sectional view of the loading hopper of the present invention;

FIG. 6 is a cross-sectional view of the upper cutter head of the present invention;

reference numerals: 1. a grinding chamber; 11. a sample discharge port; 2. a pressing cylinder; 3. feeding a hopper; 31. a cleaning mechanism; 311. a water supply cylinder; 312. pressing a plate; 313. a water pipe; 314. a water storage tank; 32. feeding pipes; 4. a stirring motor; 5. a shear motor; 6. a platen; 7. a grinding mechanism; 71. sealing the hemisphere; 72. a connecting rod; 721. a sealed ball panel; 722. a pin; 73. a ball sleeve; 74. grinding balls; 75. half-cutting a hollow ring; 751. a through hole; 752. a convex arc surface; 76. fixing the disc; 761. a column sleeve; 8. a stirring shaft; 9. a cutter; 91. a cutter head is arranged; 92. a cross cutting blade; 93. a slitting blade; 94. a driving gear; 95. a transmission gear; 96. a driven gear; 97. and (5) feeding the cutter head.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

Specific embodiments of the present invention are described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1-3, a sample grinding device for food safety inspection comprises a grinding chamber 1, a grinding disc is fixedly connected in the grinding chamber 1, a rotary disc is rotatably connected in the middle of the grinding disc, a plurality of connecting rods 72 which are in an annular array with the axis of the rotary disc as the center are rotatably connected on the rotary disc, ball sleeves 73 are fixedly connected at the outer ends of the connecting rods 72, the ball sleeves 73 are rotatably connected with grinding balls 74 on the grinding disc, the connecting rods 72 are rotatably connected with the upper side of the rotary disc through pins 722, compression springs are connected between the connecting rods 72 and the rotary disc, the upper sides of the connecting rods 72 are abutted to pressure plates 6, the pressure plates 6 are connected with piston rods of pressing cylinders 2 through compression rods, an upper hopper 3 is connected to the side of the grinding chamber 1, a shearing mechanism is arranged in the upper hopper 3, a cleaning mechanism 31 is connected to the side of the upper hopper 3, a drying mechanism is connected to the other side of the upper hopper 3, and a sample mixing mechanism is arranged below the rotary disc.

When food safety detection sample preparation, after a large sample is cut into a small sample through a shearing mechanism in a feeding hopper 3, the small sample enters a grinding cavity 1 through a feeding pipe 32 and falls on a grinding disc, at the moment, a pressing cylinder 2 is controlled to enable a pressure plate 6 to apply pressure to act on a connecting rod 72, the connecting rod 72 is rotatably connected with the grinding disc, the other end of the connecting rod 72 is rotatably connected with a grinding ball 74, a compression spring connected to the bottom side of the connecting rod 72 is not shown in the drawing, when the pressure plate 6 acts on the connecting rod 72, the grinding ball 74 can act on the sample on the grinding disc with certain pressure, so that the sample on the grinding disc is ground into powder, the powder is convenient to detect, the ground sample falls in a sample mixing mechanism below the grinding disc and is fully mixed to form a uniformly mixed sample, and the detection precision is improved.

Example 2

As shown in fig. 1-4, a sample grinding device for food safety detection comprises a grinding chamber 1, a grinding disc is fixedly connected in the grinding chamber 1, a rotary disc is rotatably connected in the middle of the grinding disc, a plurality of connecting rods 72 which are in an annular array with the axis of the rotary disc as the center are rotatably connected on the rotary disc, ball sleeves 73 are fixedly connected at the outer ends of the connecting rods 72, the ball sleeves 73 are rotatably connected with grinding balls 74 on the grinding disc, the connecting rods 72 are rotatably connected with the upper side of the rotary disc through pins 722, compression springs are connected between the connecting rods 72 and the rotary disc, the upper side of the connecting rods 72 is in contact with a pressure plate 6, the pressure plate 6 is connected with a piston rod of a compression cylinder 2 through a compression rod, an upper hopper 3 is connected to the side of the grinding chamber 1, a shearing mechanism is arranged in the upper hopper 3, the side of the upper hopper 3 is connected with a cleaning mechanism 31, and the other side of the upper hopper 3 is connected with a drying mechanism, the carousel below is provided with thoughtlessly appearance mechanism, the abrasive disc includes the hollow ring 75 of half section, the circular orbit outside that the hollow ring 75 of half section formed is fixed with the convex arc surface 752 that is the annular array, be provided with through-hole 751 on the hollow ring 75 of half section, through-hole 751 has a plurality of and evenly distributed on the abrasive disc, the hollow ring 75 inboard of half section rotates with fixed disk 76 to be connected, fixedly connected with sealed hemisphere 71 on the fixed disk 76, sealed hemisphere 71 side is provided with the spout of annular array, connecting rod 72 runs through the spout and with spout sliding connection, fixedly connected with and sealed hemisphere 71 outside laminating sliding connection's sealed ball panel 721 on the connecting rod 72, ball cover 73 includes the lagging with telescopic link fixed connection, lagging bottom side both ends fixedly connected with curb plate, the lagging, the inboard of curb plate is concave spherical surface, connecting rod 72 is the telescopic link.

One end of the connecting rod 72 is rotatably connected with a column sleeve 761 on the fixed disc 76 through a pin 722, so that the connecting rod 72 can rotate relative to the fixed disc 76, the inner side of the ball sleeve 73 is provided with a concave surface which is attached with the grinding ball 74, so that the grinding ball 74 can roll relative to the ball sleeve 73, when the grinding ball 74 rolls relative to the ball sleeve 73, a sample adhered on the grinding ball 74 can fall off, the sample adhered on the grinding ball 74 is prevented from being adhered due to extrusion, a through hole 751 is arranged on the half-section hollow ring 75, so that a sample which is ground into smaller particles falls down from the through hole 751, a convex arc surface 752 arranged on the outer side of the track of the half-section hollow ring 75 is used for pressing the grinding ball 74, when the grinding ball 74 contacts with the convex arc surface 752 in the rotating process, the grinding ball 74 can be pressed along the length direction of the connecting rod 72, so that the connecting rod 72 can stretch, and the grinding ball 74 moves along the length direction of the connecting rod 72 along with the ball sleeve 73, the sample is rolled by taking the axis of the fixed disc 76 as the center, and meanwhile, the sample can be rolled along the diameter direction of the fixed disc 76, so that the grinding efficiency and the grinding precision are improved.

Example 3

As shown in fig. 1-6, a sample grinding device for food safety inspection comprises a grinding chamber 1, a grinding disc is fixedly connected in the grinding chamber 1, a rotary disc is rotatably connected in the middle of the grinding disc, a plurality of connecting rods 72 are rotatably connected on the rotary disc, the connecting rods 72 are in an annular array with the axis of the rotary disc as the center, ball sleeves 73 are fixedly connected at the outer ends of the connecting rods 72, the ball sleeves 73 are rotatably connected with grinding balls 74 on the grinding disc, the connecting rods 72 are rotatably connected with the upper side of the rotary disc through pins 722, compression springs are connected between the connecting rods 72 and the rotary disc, the upper side of the connecting rods 72 is abutted against a pressure plate 6, the pressure plate 6 is connected with a piston rod of a pressing cylinder 2 through a pressure rod, an upper hopper 3 is connected to the side of the grinding chamber 1, a shearing mechanism is arranged in the upper hopper 3, a cleaning mechanism 31 is connected to the side of the upper hopper 3, a drying mechanism is connected to the other side of the upper hopper 3, a sample mixing mechanism is arranged below the rotary disc, the upper hopper 3 is communicated with the part of the grinding chamber 1 through a feeding pipe 32, shearing mechanism is including setting up the cutter 9 in feeding funnel 3, and cutter 9 is including last blade disc 97, lower blade disc 91 of laminating each other, goes up blade disc 97, lower blade disc 91 and includes a plurality of cross-cut blades 92 that are the annular array respectively, and the upside of going up blade disc 97 bottom side, lower blade disc 91 is crisscross longitudinal cutter piece 93 that is provided with respectively, and longitudinal cutter piece 93 is the camber, and longitudinal cutter piece 93 is linear array along the length direction of cross-cut blade 92.

The upper hopper 3 is internally provided with a cutter 9, the transverse cutting blades 92 rotate relatively to each other through the relative rotation of the upper cutter disc 97 and the lower cutter disc 91, the transverse cutting blades 92 cut a sample, the longitudinal cutting blades 93 fixedly connected to the transverse cutting blades 92 are arranged in a staggered manner, the sample can be longitudinally cut, the step of manually cutting the sample is omitted, the detection efficiency is improved, the lower cutter disc 91 is fixedly connected with the driving gear 94, the side surface of the driving gear 94 is meshed with the transmission gear 95, the transmission gear 95 is meshed with the driven gear 96, when the lower cutter disc 91 rotates under the driving of the cutting motor 5, the upper cutter disc 97 and the lower cutter disc 91 can rotate in a differential speed, the mutual cutting of the upper cutter disc 97 and the lower cutter disc 91 is realized, the upper cutter disc 97 is coaxially and rotatably connected with the upper hopper 3, the longitudinal cutting blades 93 are arranged in an arc shape, so that the longitudinal cutting blades 93 on the upper cutter disc 97 and the lower cutter disc 91 are always kept parallel when rotating relatively, and the transverse pressure on the longitudinal cutting blades 93 generated in the process of the sample is reduced, the service life of the slitting blade 93 is extended.

Example 4

As shown in fig. 1-6, a sample grinding device for food safety detection comprises a grinding chamber 1, a grinding disc is fixedly connected in the grinding chamber 1, a rotary disc is rotatably connected in the middle of the grinding disc, a plurality of connecting rods 72 are rotatably connected on the rotary disc and are in an annular array with the axis of the rotary disc as the center, the outer ends of the connecting rods 72 are fixedly connected with ball sleeves 73, the ball sleeves 73 are rotatably connected with grinding balls 74 on the grinding disc, the connecting rods 72 are rotatably connected with the upper side of the rotary disc through pins 722, compression springs are connected between the connecting rods 72 and the rotary disc, the upper side of the connecting rods 72 is abutted against a pressure plate 6, the pressure plate 6 is connected with a piston rod of a pressing cylinder 2 through a pressure rod, an upper hopper 3 is connected to the side of the grinding chamber 1, a shearing mechanism is arranged in the upper hopper 3, a cleaning mechanism 31 is connected to the side of the upper hopper 3, a drying mechanism is connected to the other side of the upper hopper 3, a sample mixing mechanism is arranged below the rotary disc, the cleaning mechanism 31 comprises a water pipe 313 connected to the side of the upper hopper 3, water pipe 313 and water storage box 314 intercommunication, water storage box 314 top is connected with water supply cylinder 311, water supply cylinder 311's piston rod and water storage box 314 sliding connection's clamp plate 312 fixed connection, water pipe 313 runs through hopper 3 and extends to 3 inboards of hopper, thoughtlessly appearance mechanism including be located the abrasive disc below and with grind the (mixing) shaft 8 of chamber 1 rotation connection, the (mixing) shaft 8 with grind the coaxial fixed connection of output shaft of the 1 bottom mounting's in chamber motor, it is provided with row appearance mouth 11 to grind chamber 1 side bottom, 8 tops of (mixing) shaft and abrasive disc center fixed connection.

The sample is cut into small blocks by a shearing mechanism, enters the grinding cavity 1 from the feeding pipe 32, the grinding mechanism 7 arranged in the grinding cavity 1 grinds the sample, the grinding motor drives the fixed disc 76 connected with the grinding disc in the middle in a horizontal rotating mode to rotate, the grinding balls 74 connected with the fixed disc 76 through the connecting rod 72 rotate on the semi-section hollow ring 75 of the grinding disc, the ground sample enters the area where the stirring shaft 8 is located below the grinding disc, and the stirring shaft 8 is fixedly connected with the output shaft of the grinding motor, so that the ground sample can be stirred uniformly in time and is discharged from the sample discharge port 11 to realize detection, after single sample detection is finished, the pressure plate 312 is driven by the water supply cylinder 311 to press the water in the water storage tank 314 to supply water into the hopper 3 through the water pipe 313, and meanwhile, the shearing motor 5 and the grinding motor keep rotating, so that the water supply to the feeding hopper 3, Grind the inside clearance that clears up of chamber 1, avoid the sample to remain to lead to next sample detection inaccurate.

Claims (10)

1. Sample grinding device for food safety inspection, comprising a grinding chamber (1), characterized in that: the grinding chamber (1) is internally and fixedly connected with a grinding disc, the middle part of the grinding disc is rotatably connected with a rotary disc, the rotary disc is rotatably connected with a plurality of connecting rods (72) which are in an annular array by taking the axis of the rotary disc as the center, the outer ends of the connecting rods (72) are fixedly connected with ball sleeves (73), the ball sleeves (73) are rotatably connected with grinding balls (74) on the grinding disc, the connecting rods (72) are rotatably connected with the upper side of the rotary disc through pins (722), compression springs are connected between the connecting rods (72) and the rotary disc, the upper part of each connecting rod (72) is in contact with a pressure plate (6), the pressure plate (6) is connected with a piston rod of a compression cylinder (2) through a compression rod, the side surface of the grinding chamber (1) is connected with a feeding hopper (3), a shearing mechanism is arranged in the feeding hopper (3), the side surface of the feeding hopper (3) is connected with a cleaning mechanism (31), and the other side surface of the feeding hopper (3) is connected with a drying mechanism, and a sample mixing mechanism is arranged below the rotary disc.

2. The sample grinding apparatus for food safety testing of claim 1, wherein: the abrasive disc is including half a section hollow ring (75), the annular track outside that half a section hollow ring (75) formed is fixed with convex arc face (752) that are the annular array, is provided with through-hole (751) on half a section hollow ring (75), through-hole (751) have a plurality of and evenly distributed on the abrasive disc, half a section hollow ring (75) inboard is connected with fixed disk (76) rotation.

3. The sample grinding apparatus for food safety testing of claim 2, wherein: fixed disk (76) is last fixedly connected with sealed hemisphere (71), sealed hemisphere (71) side is provided with the spout of annular array, connecting rod (72) run through the spout and with spout sliding connection, fixedly connected with and sealed hemisphere (71) outside laminating sliding connection's sealed spherical surface board (721) on connecting rod (72).

4. A sample grinding apparatus for food safety testing as defined in claim 3, wherein: the ball sleeve (73) comprises a sleeve plate fixedly connected with the telescopic rod, two side plates are fixedly connected to two ends of the bottom side of the sleeve plate, the inner sides of the sleeve plate and the side plates are concave spherical surfaces, and the connecting rod (72) is a telescopic rod.

5. The sample grinding apparatus for food safety testing of claim 1, wherein: go up hopper (3) and be located the part intercommunication of abrasive disc top through material loading pipe (32) and grinding chamber (1), cut the cutter (9) of mechanism in setting up in feeding hopper (3), cutter (9) are including last blade disc (97), lower blade disc (91) of laminating each other.

6. The sample grinding apparatus for food safety testing of claim 5, wherein: the upper cutter head (97) and the lower cutter head (91) respectively comprise a plurality of transverse cutting blades (92) in an annular array, and longitudinal cutting blades (93) are respectively arranged on the bottom side of the upper cutter head (97) and the upper side of the lower cutter head (91) in a staggered mode.

7. The sample grinding apparatus for food safety testing of claim 6, wherein: the longitudinal cutting blades (93) are arc-shaped, and the longitudinal cutting blades (93) are in linear array along the length direction of the transverse cutting blades (92).

8. The sample grinding apparatus for food safety testing of claim 1, wherein: cleaning mechanism (31) is including connecting in water pipe (313) of feeding funnel (3) side, water pipe (313) and water storage box (314) intercommunication, water storage box (314) top is connected with water supply cylinder (311), the piston rod of water supply cylinder (311) and water storage box (314) sliding connection's clamp plate (312) fixed connection, water pipe (313) run through feeding funnel (3) and extend to feeding funnel (3) inboard.

9. The sample grinding apparatus for food safety testing of claim 8, wherein: mix appearance mechanism including be located the abrasive disc below and with grind chamber (1) rotation connection (mixing) shaft (8), the coaxial fixed connection of output shaft of (mixing) shaft (8) and the motor of grinding chamber (1) bottom mounting, it is provided with stock layout mouth (11) to grind chamber (1) side bottom, (mixing) shaft (8) top and abrasive disc center fixed connection.

10. The method of testing a sample grinding device for food safety testing of any of claims 1-9, wherein: the method comprises the following steps:

s1, placing food to be detected into a feeding hopper (3), cutting a large detection sample into small blocks by a cutting mechanism, and feeding the small blocks into a grinding cavity (1) through a feeding pipe (32);

s2, the materials entering the grinding cavity (1) fall on a grinding disc, at the moment, grinding balls (74) rotatably connected to the upper portion of the grinding disc are pressed downwards under the action of a pressure plate (6) and are driven to rotate by an external motor, so that the grinding balls (74) continuously roll the materials on the grinding disc until the materials on the grinding disc are ground into particles, and then the particles fall to the lower portion of the grinding disc from the grinding disc;

s3, the materials entering the lower part of the grinding disc are fully and uniformly mixed under the driving of the sample mixing mechanism, and then the mixed sample is taken for detection;

s4, after the single sample detection is finished, the cleaning mechanism (31) is used for cleaning the feeding hopper (3) and the grinding cavity (1) to ensure that internal substances are emptied so as to ensure the accuracy of the next detection.

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