Food inspection sample preparation device

Abstract

The food inspection sample preparation device comprises a base, a sample preparation cavity, an upper cover and a crushing assembly, the sample preparation cavity is a cylinder with an inner cavity, the top of the sample preparation cavity is open, the middle of the bottom end of the sample preparation cavity is provided with a conical discharging end with an opening gradually becoming smaller downwards, and the top end of the base is provided with an embedding groove which is of a circular structure and can allow the bottom end of the sample preparation cavity to be embedded and placed; the upper cover is arranged at the top end of the sample preparation cavity in a buckled mode, a motor is arranged in the upper cover, the output end of the motor is connected with a smashing assembly, and a plurality of airflow blowing-in openings are evenly formed in the side wall of the conical discharging end in the circumferential direction. The side wall of the embedded end is provided with communicating ports corresponding to the airflow blowing-in ports in position, an annular air duct communicated with the communicating ports is further arranged in the base, a fan is arranged in the base, and a drawer type powder collecting box is arranged on one side of the outer portion of the base. According to the crushing device, materials can be in full contact with the crushing assembly in the crushing process, and the crushing uniformity and the crushing efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of food inspection equipment, and particularly relates to a food inspection sample preparation device. BACKGROUND

[0002] With increasing attention to food safety, the accuracy of food inspection becomes crucial. In the process of food inspection, sample preparation is a key step, and the quality of sample preparation directly affects the accuracy of subsequent detection results. The design of the sample preparation device not only needs to ensure that the sample can be effectively crushed, but also needs to ensure that the crushed sample is uniform to ensure its representativeness and the reliability of detection.

[0003] At present, there are various food inspection sample preparation devices on the market. Common sample preparation devices usually use blades or grinding discs to crush materials. These devices are usually simple in structure, but have certain deficiencies in crushing efficiency and uniformity. For example, in traditional equipment, the crushing blades cannot completely cover the entire area of the sample preparation cavity, resulting in uneven crushing of part of the material and affecting the representativeness of the prepared sample. In addition, some devices cannot effectively control the flow of powder during crushing, resulting in a large amount of uncrushed powder remaining in the sample preparation cavity.

[0004] Therefore, how to optimize the existing sample preparation device in structure, improve the crushing efficiency and uniformity, and reduce the powder residue is a technical problem to be solved at present. CONTENT OF THE INVENTION

[0005] The present application provides a food inspection sample preparation device to solve the problem of low crushing efficiency of the sample preparation device in the prior art.

[0006] The application provides a food inspection sample preparation device, which comprises a base, a sample preparation cavity, an upper cover and a crushing assembly. The sample preparation cavity is cylindrical and has an internal cavity. The top of the sample preparation cavity is open. A conical discharge end, which is gradually reduced in size from top to bottom, is arranged in the middle of the bottom end of the sample preparation cavity. The top end of the base is provided with an embedded groove in a circular structure, which can embed and place the bottom end of the sample preparation cavity. The bottom end of the sample preparation cavity is supported by the upper surface of the embedded groove. The middle of the embedded groove is provided with an embedded end which is adapted to the conical discharge end. The upper cover is buckled on the top end of the sample preparation cavity. A motor is arranged in the upper cover. The output end of the motor is connected with the crushing assembly which can crush the added material in the sample preparation cavity. A plurality of airflow inlet ports are uniformly arranged on the sidewall of the conical discharge end in a ring shape. A communication port corresponding to the position of the airflow inlet port is arranged on the sidewall of the embedded end. An annular air duct which is in communication with each communication port is further arranged in the base. The annular air duct is located in the peripheral ring of each communication port. A fan for blowing air into the annular air duct is arranged in the base. A drawer type powder collection box is arranged in the base. The bottom end of the conical discharge end is located above the drawer type powder collection box.

[0007] In an optional embodiment, a one-way valve is arranged at the communication port, which is used to make the air flow in the annular air duct enter the sample preparation cavity and prevent the powder from flowing back to the communication port. A discharge port is arranged at the bottom end of the conical discharge end. A channel port which is in communication with the drawer type powder collection box is arranged at the bottom end of the embedded end. An electromagnetic valve is arranged at the channel port to control the discharge.

[0008] In an optional embodiment, the crushing assembly comprises a rotating shaft, a blade connecting shaft cylinder, a first blade assembly and a second blade assembly. The rotating shaft is connected with the output end of the motor and vertically extends downward from the bottom end of the upper cover. The blade connecting shaft cylinder is detachably connected with the rotating shaft by bolts. A plurality of connecting holes which are vertically spaced and can be connected by bolts are arranged on the rotating shaft. The first blade assembly and the second blade assembly are arranged on the blade connecting shaft cylinder in an up-down manner. The first blade assembly is a thin, horizontally arranged disc-shaped blade structure. The disc circumferential edge of the first blade assembly is provided with a sawtooth or wavy blade. The second blade assembly is a vertical cylindrical structure. The second blade assembly comprises a sleeve connected with the blade connecting shaft cylinder and a sleeve ring vertically arranged outside the sleeve. A vertical blade is uniformly arranged on the outer ring surface of each sleeve ring in a circumferential direction.

[0009] In an optional embodiment, an operation panel is arranged on the outer side of the base in an inclined manner, the operation panel is located above the drawer opening of the drawer type powder collecting box, and the operation panel is provided with a power switch, a motor switch, a solenoid valve manual switch and a fan switch, the power switch is used to control the power-on and power-off of the entire device, the motor switch is used to control the start and stop of the motor, the solenoid valve manual switch is used to control the opening and closing of the solenoid valve, and the fan switch is used to control the start and stop of the fan.

[0010] In an optional embodiment, a first annular sealing ring is arranged on the annular side wall of the embedding groove, a reinforced mounting seat is fixedly connected to the outer periphery of the lower end of the sample preparation cavity, the bottom end surface of the reinforced mounting seat is in contact with the top surface of the embedding groove, the top end of the reinforced mounting seat is provided with an annular folded edge which is distributed outward and extrudes and contacts the first annular sealing ring, and a reserved hole is formed in the bottom end of the reinforced mounting seat, and the conical discharging end can pass through the reserved hole.

[0011] In an optional embodiment, the top end of the sample preparation cavity is provided with an annular groove, the bottom end of the upper cover is provided with an annular boss matched with the annular groove, and a second annular sealing ring is embedded on the inner side of the annular groove, and the second annular sealing ring is used to seal the connection between the sample preparation cavity and the upper cover when the upper cover is buckled with the sample preparation cavity.

[0012] In an optional embodiment, the one-way valve is a spring type one-way valve or a rubber membrane type one-way valve.

[0013] In an optional embodiment, the fan installed in the base is a variable speed fan capable of adjusting the wind speed.

[0014] Compared with the prior art, the application has the following beneficial effects:

[0015] 1. The bottom end of the sample preparation cavity is provided with a conical discharging end which is gradually reduced in size downward, which utilizes the gravity to guide the pulverized material to concentrate downward, reduces the retention of the powder in the bottom during the pulverization process, reduces the adhesion of the powder during use, optimizes the flow path of the powder discharged from the sample preparation cavity, and forms a stable support structure by supporting the bottom end of the sample preparation cavity by the upper surface of the embedding groove and tightly combining the conical discharging end with the embedding groove of the base, which not only enhances the overall stability of the sample preparation cavity, but also enables the pulverized powder to flow into the drawer type powder collecting box quickly through the conical discharging end, reduces the powder residue, and improves the sample collection efficiency.

[0016] 2. The crushing assembly in the present application is driven by the motor in the upper cover and can rotate at high speed inside the sample preparation cavity. The sample preparation cavity is designed in a cylindrical shape with an open top. This not only facilitates the feeding of materials through the open top of the sample preparation cavity, but also facilitates the buckling of the upper cover. In addition, the simple structure of the sample preparation cavity can also meet the requirements of feeding a large amount of materials and subsequent cleaning. In addition, the rotation of the crushing assembly also forms a synergistic effect with the airflow of the airflow inlet, which can exert additional disturbance and pushing force on the materials, so that the materials can be in good contact with the crushing assembly during the crushing process, thereby further improving the crushing uniformity and crushing efficiency, and meeting the demand for high representativeness of samples in food inspection.

[0017] 3. The side wall of the conical discharge end is uniformly provided with a plurality of airflow inlets. The fan in the base can blow air into the annular air duct in the base, and then the air can enter the sample preparation cavity through the airflow inlets. Such a design not only reduces the adhesion of powders in the sample preparation cavity during the crushing process, but also assists the flow of materials in the sample preparation cavity through the entry of air flow. At the same time, when cleaning, the residual powder in the sample preparation cavity can be blown off by starting the fan, thereby making the cleaning more thorough.

[0018] 4. The drawer-type powder collection box is directly arranged on the outside of the base at the outlet of the conical discharge end. Such a design facilitates the direct discharge of the powder into the drawer-type powder collection box after the crushing is completed, without the need for additional flow guide structure, thereby reducing the obstruction and residual possibility in the powder discharge path. At the same time, the external drawer-type design facilitates the user to quickly take out the powder after the sample preparation is completed, and also facilitates the cleaning of the drawer-type powder collection box. The collection method of such structure simplifies the operation process, and also improves the cleaning efficiency and use convenience of the device. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 The structural composition diagram of the food inspection sample preparation device provided by an embodiment of the present application is shown in the figure.

[0021] Figure 2 The overall three-dimensional schematic diagram of the food inspection sample preparation device provided by an embodiment of the present application is shown in the figure.

[0022] Figure 3 The structural diagram of the base provided by an embodiment of the present application is shown in the figure.

[0023] Figure 4 A schematic view of a cross section of the base according to an embodiment of the present application is provided.

[0024] Figure 5 A schematic view of the structure of the upper cover according to an embodiment of the present application is provided.

[0025] Figure 6 A schematic view of the structure of the crushing assembly according to an embodiment of the present application is provided.

[0026] Figure 7 A schematic view of the structure of the sample preparation cavity according to an embodiment of the present application is provided.

[0027] Figure 8 A schematic view of another perspective of the sample preparation cavity according to an embodiment of the present application is provided.

[0028] In the figure, 100, base; 110, embedded slot; 111, embedded end; 112, communication port; 113, discharge port; 1121, one-way valve; 1131, electromagnetic valve; 114, first annular sealing ring; 120, annular air duct; 200, sample preparation cavity; 210, conical discharging end; 211, air flow inlet; 220, reinforced mounting seat; 221, annular folded edge; 230, annular groove; 231, second annular sealing ring; 300, upper cover; 310, annular boss; 400, crushing assembly; 410, rotating shaft; 420, blade connecting shaft cylinder; 430, first blade assembly; 440, second blade assembly; 441, sleeve; 442, collar; 443, vertical blade; 500, drawer type powder collection box; 600, operation panel; 610, power switch; 620, motor switch; 630, electromagnetic valve manual switch; 640, air blower switch. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0030] Please refer to Figures 1-8The embodiment of the present application provides a food inspection sample preparation device, which comprises a base 100, a sample preparation cavity 200, an upper cover 300 and a crushing assembly 400. The sample preparation cavity 200 is in a cylindrical shape with an internal cavity. The top of the sample preparation cavity 200 is in an open shape. The bottom end of the sample preparation cavity 200 is provided with a tapered discharge end 210 which is gradually reduced in size downward. The top end of the base 100 is provided with an embedded groove 110 in a circular structure and capable of embedding and placing the bottom end of the sample preparation cavity 200. The bottom end of the sample preparation cavity 200 is supported by the upper surface of the embedded groove 110. The middle part of the embedded groove 110 is provided with an embedded end 111 which is adapted to the tapered discharge end 210. The upper cover 300 is buckled on the top end of the sample preparation cavity 200. The upper cover 300 is provided with a motor. The output end of the motor is connected with the crushing assembly 400 which is capable of crushing the added materials in the sample preparation cavity 200. A plurality of airflow inlet ports 211 are uniformly and circularly provided on the sidewall of the tapered discharge end 210. Each airflow inlet port 211 is vertically provided on the sidewall of the tapered discharge end 210. The sidewall of the embedded end 111 is provided with a communication port 112 which corresponds to the position of the airflow inlet port 211. The base 100 is further provided with a ring-shaped air duct 120 which is connected with each communication port 112. The ring-shaped air duct 120 is located at the circumferential periphery of each communication port 112. The base 100 is provided with a fan (omitted in the drawing) for blowing air into the ring-shaped air duct 120. One side of the outer part of the base 100 is provided with a drawer-type powder collection box 500 which is embedded in the inner part of the base 100. The bottom end of the tapered discharge end 210 is located above the drawer-type powder collection box 500. Optionally, the sample preparation cavity 200 can be made of transparent material to facilitate the observation of the inside of the sample preparation cavity 200. For example, the sample preparation cavity 200 can be made of polycarbonate (PC), acrylic (PMMA) or other transparent materials. These materials not only provide the required transparency for easy observation, but also have sufficient strength, wear resistance, chemical corrosion resistance and other properties, thereby ensuring long-term stable use and safe use of the device.

[0031] In the embodiment of the present application, the bottom end of the sample preparation cavity 200 is provided with the tapered discharge end 210 which is gradually reduced in size downward. This design utilizes the gravity to guide the crushed materials to concentrate downward, reduces the retention of powder at the bottom during the crushing process, reduces the adhesion of powder during use, and optimizes the flow path of the powder discharged from the sample preparation cavity 200. The bottom end of the sample preparation cavity 200 is supported by the upper surface of the embedded groove 110, and the tapered discharge end 210 is tightly combined with the embedded groove 110 of the base 100 to form a stable support structure. This structure design not only enhances the overall stability of the sample preparation cavity 200, but also enables the powder after crushing to quickly flow into the drawer-type powder collection box 500 through the tapered discharge end 210 by a simple connection method, thereby reducing the powder residue and improving the collection efficiency of the sample.

[0032] The crushing assembly 400 in the embodiment of the present application is driven by a motor in the upper cover and can rotate at high speed inside the sample preparation cavity 200. The sample preparation cavity 200 is designed in a cylindrical shape with an open top. This not only facilitates the feeding of materials through the open top of the sample preparation cavity 200, but also facilitates the buckling of the upper cover. In addition, the simple structure of the sample preparation cavity can also meet the requirements of feeding a large amount of materials and subsequent cleaning. In addition, the rotation of the crushing assembly 400 also forms a synergistic effect with the airflow of the airflow inlet 211, which can exert additional disturbance and pushing force on the materials. This makes the materials in the crushing process better contact with the crushing assembly 400, thereby further improving the crushing uniformity and crushing efficiency, and meeting the high representativeness requirement of the sample in food inspection.

[0033] In addition, a plurality of airflow inlets 211 are uniformly arranged on the sidewall of the conical discharging end 210. The fan in the base 100 can blow air into the annular air duct 120 in the base 100, and then the air enters the sample preparation cavity 200 through the airflow inlets 211. Such a design not only reduces the adhesion of powder in the sample preparation cavity 200 during the crushing process, but also assists the flow of materials in the sample preparation cavity 200 through the entry of air. First, the airflow can push the materials to approach the crushing assembly 400, increasing the contact frequency of the materials with the crushing assembly 400 and further enhancing the crushing effect. Second, the airflow can disturb the powder particles to avoid incomplete crushing caused by powder accumulation. Moreover, the uniformly distributed airflow inlets 211 can better ensure the balance of air pressure in the sample preparation cavity 200, making the distribution of powder in the entire sample preparation cavity 200 more uniform, avoiding the phenomenon of powder segregation or accumulation in traditional devices, and thereby improving the overall efficiency of crushing. At the same time, when cleaning, the fan can be turned on to blow away the residual powder in the sample preparation cavity 200, thereby making the cleaning more thorough.

[0034] In addition, the drawer-type powder collection box 500 is directly arranged on the outside of the base 100 at the outlet of the conical discharging end 210. Such a design facilitates the direct discharge of powder into the drawer-type powder collection box 500 after crushing, without the need for additional flow guide structures, reducing the possibility of obstruction and residue in the powder discharge path. At the same time, the external drawer design facilitates the user to quickly remove the powder after sample preparation, and also facilitates the cleaning of the drawer-type powder collection box 500. This collection method simplifies the operation process and also improves the cleaning efficiency and use convenience of the device.

[0035] In some embodiments, as Figure 4As shown, a one-way valve 1121 is installed at the communication port 112, which is used to make the airflow in the annular air duct 120 enter the sample preparation cavity 200 and can prevent the powder from flowing back to the communication port 112, as shown Figure 3 and Figure 4 As shown, the bottom end of the conical discharging end 210 is provided with a discharging port 113, and the bottom end of the embedded end 111 is provided with a passage opening to the drawer type powder collection box 500 and is provided with an electromagnetic valve 1131 at the passage opening to control the discharging of the powder.

[0036] The installation of the one-way valve 1121 at the communication port 112 can make the airflow in the annular air duct 120 enter the sample preparation cavity 200 in only one direction, which can effectively improve the effectiveness of the airflow. In use, the one-way valve 1121 can make the airflow only enter the sample preparation cavity 200 through the airflow inlet 211, and will not flow back to the communication port 112 or the annular air duct 120, avoiding the loss of airflow, thereby increasing the driving force of the airflow, making the powder more easily flow in the sample preparation cavity 200. During the crushing process, a small amount of fine powder may be guided to the communication port 112, and the presence of the one-way valve 1121 can effectively prevent the powder from flowing back to the annular air duct, avoiding the pollution of the airflow system or causing the fan to be blocked.

[0037] In this embodiment, the bottom end of the embedded end 111 is provided with a passage opening to the drawer type powder collection box 500 and is provided with an electromagnetic valve 1131 at the passage opening, which mainly controls the discharging process of the powder. In use, through the electromagnetic valve 1131, the user can flexibly open or close the discharging port 113 according to the needs, and can discharge after the crushing is completed, thereby avoiding the premature discharge of the material that is not fully crushed, and improving the preparation quality of the sample. The electromagnetic valve 1131 can completely close the passage opening at the bottom end of the embedded end 111 in the closed state, avoiding the leakage of the powder during the operation of the device, thereby keeping the surrounding environment of the device clean.

[0038] In this embodiment, through the cooperation of the one-way valve 1121 installed at the communication port 112 and the electromagnetic valve 1131 installed at the passage opening at the bottom end of the embedded end 111, in use, the one-way valve 1121 and the electromagnetic valve 1131 work together to make the device achieve higher operation efficiency in the process of airflow guiding and powder discharging, and the use is more reliable. In the use process, the one-way valve 1121 controls the directionality of the airflow, avoiding the backflow of the powder to the annular air duct 120, and the electromagnetic valve 1131 remains closed before the powder is discharged, further ensuring that the powder will not be disturbed by the airflow and leak out. The cooperation of the two ensures the independence and stability of the internal air path and the discharging path of the device. After the crushing is completed, the user can control the discharging through the electromagnetic valve 1131, and the one-way valve 1121 prevents the backflow of the powder, realizing the efficient connection from sample preparation to discharging, and also reducing the problem of powder retention.

[0039] In some embodiments, as shown in Figure 5 and Figure 6 The pulverizing assembly 400 includes a rotating shaft 410, a blade connecting shaft cylinder 420, a first blade assembly 430, and a second blade assembly 440. The rotating shaft 410 is connected to the output end of the motor and extends downward from the bottom end of the upper cover 300. The blade connecting shaft cylinder 420 is detachably connected to the rotating shaft 410 by bolts. A plurality of connecting holes are formed on the rotating shaft 410 for bolt connection and vertically spaced distribution. The first blade assembly 430 and the second blade assembly 440 are vertically spaced on the blade connecting shaft cylinder 420. The first blade assembly 430 is a thin, horizontally arranged disc-shaped blade structure. The disc circumferential edge of the first blade assembly 430 is provided with a sawtooth or wavy blade. The second blade assembly 440 is a vertical cylindrical structure. The second blade assembly 440 includes a sleeve 441 connected to the blade connecting shaft cylinder 420 and a sleeve ring 442 vertically spaced outside the sleeve 441. Each sleeve ring 442 is uniformly provided with a vertical blade 443 on the outer ring surface in the circumferential direction.

[0040] In this embodiment, the first blade assembly 430 of the pulverizing assembly 400 is a horizontally arranged disc-shaped structure, and the second blade assembly 440 is a vertically distributed blade structure. This combination of horizontal and vertical design can fully utilize the characteristics of blade spatial layout and rotational motion, greatly improving the pulverizing performance, improving the uniformity of pulverization, and improving the pulverizing efficiency. Specifically:

[0041] The pulverizing assembly 400 can rotate at high speed under the drive of the motor. The first blade assembly 430 exerts a mainly outward expanding centrifugal cutting force on the material during rotation. Combined with the design of the sawtooth or wavy edge blade, the material can be quickly broken during high-speed rotation, weakening the overall strength of the particles. This is suitable for breaking larger particles, so that the material can be processed into smaller particles in a short time. The second blade assembly 440 is provided with a vertical blade 443 on the outer ring surface of the vertically spaced sleeve ring 442. This design allows the second blade assembly 440 to exert a multi-point cutting force on the material in the vertical direction during rotation, further refining the broken particles, while also breaking the adhesion or accumulation between the particles, thereby complementing the breaking action of the first blade assembly 430 and achieving a full range of breaking effect. This design can significantly improve the breaking efficiency of the material.

[0042] In addition, the first blade assembly 430 adopts a horizontally arranged disc-shaped blade structure, and the disc circumferential edge is provided with a serrated or wavy blade. During rotation, a circumferential high-speed airflow can be formed in the sample preparation cavity 200, and the material can be guided to the blade edge for cutting under the pushing of the airflow, while direct accumulation of the material directly below the blade is avoided. This cutting mode driven by the airflow further improves the flowability of the material, so that the contact between the material and the blade is more sufficient, and the crushing efficiency is improved. The second blade assembly 440 can disturb the airflow during the rotation crushing process, so that the particles are always in a dynamic motion state, thereby increasing the contact frequency of the material with the vertical blade 443, improving the crushing efficiency, and avoiding the accumulation phenomenon. The sleeve ring 442 uniformly distributed with the vertical blade 443 is vertically spaced outside the sleeve 441. During the material refining and crushing process, the crushing dead angle area in the sample preparation cavity 200 can be reduced, thereby realizing more uniform crushing effect. During use of the crushing assembly 400, the fan is turned on, and the airflow from below the sample preparation cavity 200 can blow the material, thereby further improving the crushing effect.

[0043] In some embodiments, as shown in Figures 1-3 An operation panel 600 is arranged on the upper side of the outer side of the base 100 in an inclined arrangement, and the operation panel 600 is located above the drawer type powder collection box 500, as shown in Figure 2 The operation panel 600 is provided with a power switch 610, a motor switch 620, an electromagnetic valve manual switch 630, and a fan switch 640. The power switch 610 is used to control the power-on and power-off of the entire device, the motor switch 620 is used to control the start and stop of the motor, the electromagnetic valve manual switch 630 is used to control the opening and closing of the electromagnetic valve 1131, and the fan switch 640 is used to control the start and stop of the fan. In actual application, the sample preparation device can adopt an external power supply. A power line interface is arranged at the lower rear of the base 100, and the power line interface can be connected with a power cord with a plug to be connected with an external power supply, thereby providing power for the device.

[0044] The embodiment can realize centralized control of the functions of the device by designing the operation panel 600 arranged obliquely on the outside of the base 100 and arranging the power switch 610, the motor switch 620, the electromagnetic valve manual switch 630 and the fan switch 640 on the operation panel 600. The design of the oblique operation panel 600 can display the power switch 610, the motor switch 620, the electromagnetic valve manual switch 630 and the fan switch 640 in the user's line of sight in a centralized and clear manner, making the operation more intuitive and facilitating quick positioning of the function to be operated. Moreover, the embodiment independently arranges the power switch 610, the motor switch 620, the electromagnetic valve manual switch 630 and the fan switch 640, and the four independent switches control the power supply, the motor start-stop, the electromagnetic valve operation and the fan start-stop of the device respectively, which can improve the flexibility of the device control. The power switch 610 can quickly control the power-on and power-off of the entire device, which is particularly suitable for quick power-off operation in emergency situations, making the use safer. The motor switch 620 is separated from the power switch 610, which allows the user to control the start-stop of the motor separately after the device is powered on according to the needs, for example, stopping the motor operation without closing the power supply of the entire machine after the crushing is completed. In use, the user can manually control the powder discharge process according to the actual needs through the electromagnetic valve manual switch 630 without the aid of an automatic program, which is particularly suitable for the case of accurately controlling the sample amount in the experimental scene. Through the fan switch 640, the fan can be flexibly turned on according to the needs to improve the use effect of the device.

[0045] In some embodiments, as shown in Figure 1 and Figure 3 , the annular side wall of the embedding groove 110 is provided with a first annular sealing ring 114, the lower end of the sample preparation cavity 200 is fixedly sleeved with a reinforced mounting seat 220, the bottom end face of the reinforced mounting seat 220 is in contact with the top face of the embedding groove 110, as shown in Figure 7 and Figure 8 , the top end of the reinforced mounting seat 220 is provided with an annular folded edge 221 distributed and extruded to contact the first annular sealing ring 114, and the bottom end of the reinforced mounting seat 220 is provided with a reserved hole through which the tapered discharge end 210 passes.

[0046] The lower end of the sample preparation cavity 200 is provided with a reinforcing mounting seat 220 to achieve embedded fitting connection with the embedding groove 110 of the base 100, so as to form a relatively stable support structure. The bottom end of the reinforcing mounting seat 220 is in contact with the top surface of the embedding groove 110, and the top end of the reinforcing mounting seat 220 is provided with an annular folded edge 221, which further increases the contact area with the base 100. Compared with the simple embedded design, the addition of the reinforcing mounting seat 220 improves the anti-overturning capability of the sample preparation cavity 200 during high-speed rotation and vibration. Moreover, the annular folded edge 221 is in extrusion contact with the first annular sealing ring 114 mounted on the annular side wall of the embedding groove 110, so as to form a tight connection structure, which reduces the shaking or displacement of the sample preparation cavity 200 during operation due to vibration, and makes the operation of the device more stable and reliable.

[0047] In some embodiments, as shown in Figure 7 and Figure 8 The top end of the sample preparation cavity 200 is provided with an annular groove 230, the bottom end of the upper cover 300 is provided with an annular boss 310 matched with the annular groove 230, and the inner side of the annular groove 230 is embedded with a second annular sealing ring 231, which is used to seal the connection between the sample preparation cavity 200 and the upper cover 300 when the upper cover 300 is buckled with the sample preparation cavity 200.

[0048] The annular groove 230 at the top end of the sample preparation cavity 200 and the annular boss 310 at the bottom end of the upper cover 300 are tightly connected by buckling, which can improve the stability of the connection compared with the traditional flat contact method. The matching connection of the annular boss 310 and the annular groove 230 forms a continuous contact interface, thereby ensuring the stability of the connection. Moreover, the annular buckling structure realizes fastening connection by mechanical clamping, which can avoid loosening caused by vibration or long-term use, thereby making the use more reliable. In addition, the annular boss 310 can naturally align with the annular groove 230, so that the upper cover 300 and the sample preparation cavity 200 are automatically positioned during installation, reducing human error.

[0049] The second annular sealing ring 231 is embedded in the annular groove 230, and the second annular sealing ring 231 is in extrusion contact with the annular boss 310, so as to realize the sealing effect of the top connection of the sample preparation cavity 200. This structure design is important for the operation and environmental cleaning of the device.

[0050] The top of the sample preparation cavity 200 is an important area where powder may spread during the crushing process. The second annular sealing ring 231 can effectively prevent fine powder from leaking from the top joint gap, thereby ensuring the cleanliness of the operating environment. Moreover, the use of the second annular sealing ring 231 can ensure the closure of the airflow passage, avoiding the leakage of airflow from the top gap, thereby improving the effective utilization rate of airflow during the crushing process and optimizing the effect of airflow-assisted crushing.

[0051] In addition, the snap-fit structure of the annular groove 230 and the annular boss 310 not only provides stable and sealed connection, but also greatly facilitates the installation and removal operation of the upper cover 300. The user only needs to align the annular boss 310 of the upper cover 300 with the annular groove 230 of the sample preparation cavity 200, and gently snap-fit to complete the installation. No additional fasteners are required, simplifying the operation process and saving operation time. Moreover, the snap-fit structure allows the user to quickly disassemble the upper cover 300, facilitating the cleaning of powder residues in the sample preparation cavity 200. In actual application, the first annular sealing ring 114 and the second annular sealing ring 231 can be made of wear-resistant and high-temperature-resistant materials.

[0052] In some embodiments, the one-way valve 1121 is a spring-type one-way valve or a rubber membrane-type one-way valve. The spring-type one-way valve or the rubber membrane-type one-way valve is used as the airflow control element in this embodiment. Both of these one-way valves belong to relatively simple airflow control elements, are easy to implement, have long service life, low maintenance cost, and good sealing performance. The spring-type one-way valve realizes one-way flow of airflow through spring compression principle, while the rubber membrane-type one-way valve realizes one-way passage of airflow through the flexibility of the rubber membrane. Both can quickly respond when the airflow direction changes, maintaining the high sealing performance of the system.

[0053] In some embodiments, the fan installed in the base 100 is a variable speed fan that can adjust the air speed. The variable speed fan is used in this embodiment, which can facilitate the control of air speed to realize the adjustment of airflow speed and intensity. In use, the air speed of the variable speed fan can be adjusted according to the use requirements, and the air speed of the variable speed fan is adjusted when different materials and working conditions (such as more or less material) are used, thereby meeting the needs of various working conditions and avoiding the functional limitations caused by fixed airflow speed.

[0054] In use, the use effect of the air flow can be improved by adjusting the air speed, so as to reduce unnecessary power consumption under the premise of ensuring the air flow effect. For example, increasing the air speed during the crushing process can better disturb the material and improve the crushing efficiency. When high-intensity air flow is not needed, the adjustment of the air speed can reduce the noise of the fan operation, providing a more quiet operating environment for the user. Moreover, the use of the variable speed fan enables the user to adjust the air flow parameters of the sample preparation device according to the characteristics of the material, thereby improving the adaptability to various materials. For example, for lighter or finer materials, the air speed can be appropriately reduced; for heavier or larger particles, the air speed can be increased to enhance the flowability of the powder and improve the crushing effect. In actual application, when a variable speed fan is used, an adjustment knob for variable speed control of the fan can be installed on the operation panel 600, or a gear button capable of achieving different air speeds can be used.

[0055] The food inspection sample preparation device of the embodiments of the present application is suitable for hard or medium-hard raw materials, which are usually in the form of particles, blocks or irregular shapes and have a certain hardness, and are difficult to be crushed by simple manual operation. For example, seed types (such as soybeans, peanuts, etc.), food raw materials (such as rice, corn, etc.), dry plant materials (such as herbs, medicinal materials, etc.), and relatively hard medicinal materials (such as medlar, licorice, etc.). The use process of the food inspection sample preparation device is as follows:

[0056] 1. Preparation stage

[0057] Open the upper cover 300, and add the food raw material to be prepared into the sample preparation cavity 200. Confirm that the amount of the raw material in the sample preparation cavity 200 is moderate, and ensure that it does not exceed the designed capacity. Close the upper cover 300 and check whether the annular groove 230 and the annular boss 310 are firmly connected, and whether the second sealing ring 231 is in place.

[0058] 2. Start the device

[0059] Turn on the power supply of the device by using the power switch 610 on the operation panel 600. Start the motor switch 620, and the motor drives the crushing assembly 400 to start rotating, and the first blade assembly 430 and the second blade assembly 440 operate at high speed; at the same time, start the fan switch 640, and blow air into the sample preparation cavity 200 through the annular air duct 120.

[0060] 3. Crushing process

[0061] Under the driving of the motor, the crushing assembly 400 rotates at high speed, and the first blade assembly 430 and the second blade assembly 440 crush the material. During the crushing process, the air flow disturbance makes the particles not easy to adhere or accumulate, and the material is always in a dynamic state.

[0062] 4. Sample collection

[0063] After the crushing is completed, the sample is concentrated to the discharge port 113 through the conical discharge end 210. The user can open the electromagnetic valve 1131 by operating the electromagnetic valve manual switch 630 on the operation panel 600, control the powder to enter the drawer type powder collection box 500, and thus collect the test sample.

[0064] 5. Shutdown and cleaning

[0065] Turn off the motor and fan, and disconnect the power supply by operating the power supply switch 610 on the operation panel. Disassemble the upper cover 300 to check whether there is residual material in the sample preparation chamber 200 and the crushing assembly 400, and disassemble the crushing assembly 400 for cleaning if necessary. After cleaning, reset the equipment to ensure cleanliness and stability for the next use.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that; it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A food inspection specimen preparation device, characterized by, The utility model relates to a sample preparation device, which comprises a base (100), a sample preparation cavity (200), an upper cover (300) and a crushing assembly (400), the sample preparation cavity (200) is cylindrical with an internal cavity, the top of the sample preparation cavity (200) is open, a tapered discharge end (210) gradually decreasing from top to bottom is arranged in the middle of the bottom end of the sample preparation cavity (200), the top end of the base (100) is provided with an embedded groove (110) in a circular structure, the bottom end of the sample preparation cavity (200) is supported by the upper surface of the embedded groove (110), the middle of the embedded groove (110) is provided with an embedded end (111) adapted to the tapered discharge end (210), the upper cover (300) is buckled on the top end of the sample preparation cavity (200), a motor is arranged in the upper cover (300), the output end of the motor is connected with the crushing assembly (400) capable of crushing the added material in the sample preparation cavity (200), a plurality of airflow inlet ports (211) are uniformly arranged on the sidewall of the tapered discharge end (210), a communication port (112) corresponding to the position of the airflow inlet port (211) is arranged on the sidewall of the embedded end (111), an annular air duct (120) is further arranged in the base (100) and connected with each communication port (112), the annular air duct (120) is located at the peripheral periphery of each communication port (112), a fan is arranged in the base (100) for blowing air into the annular air duct (120), a drawer type powder collection box (500) is arranged on one side of the base (100), the bottom end of the tapered discharge end (210) is located above the drawer type powder collection box (500).

2. The food inspection specimen preparation device of claim 1, wherein, A one-way valve (1121) is arranged at the communication port (112), which is used for allowing the air blown into the annular air duct (120) to enter the sample preparation cavity (200) and preventing powder from flowing back to the communication port (112), a discharge port (113) is arranged at the bottom end of the tapered discharge end (210), a passage port is arranged at the bottom end of the embedded end (111) and connected with the drawer type powder collection box (500), and an electromagnetic valve (1131) is arranged at the passage port for controlling discharge.

3. The food inspection specimen preparation device of claim 2, wherein, The pulverizing assembly (400) comprises a rotating shaft (410), a blade connecting shaft cylinder (420), a first blade assembly (430) and a second blade assembly (440), the rotating shaft (410) is connected with the output end of the motor and vertically downwardly extends out of the bottom end of the upper cover (300), the blade connecting shaft cylinder (420) is detachably connected on the rotating shaft (410) by bolts, a plurality of connecting holes vertically and spacedly distributed are formed on the rotating shaft (410) for bolt connection, the first blade assembly (430) and the second blade assembly (440) are vertically and spacedly arranged on the blade connecting shaft cylinder (420), the first blade assembly (430) is a thin, horizontally arranged disc-shaped blade structure, the disc circumferential edge of the first blade assembly (430) is provided with a sawtooth or wavy blade, the second blade assembly (440) is a vertical cylindrical structure, the second blade assembly (440) comprises a sleeve (441) connected with the blade connecting shaft cylinder (420) and a sleeve ring (442) vertically and spacedly arranged outside the sleeve (441), a vertical blade (443) is uniformly arranged on the outer ring surface of each sleeve ring (442) in the circumferential direction.

4. A food inspection sampling device according to claim 2 or 3, characterised in that, An operation panel (600) is arranged on the upper side of the outer side of the base (100) in an inclined arrangement, the operation panel (600) is located above the drawer type powder collecting box (500), a power switch (610), a motor switch (620), an electromagnetic valve manual switch (630) and a fan switch (640) are arranged on the operation panel (600), the power switch (610) is used for controlling the power-on and power-off of the whole device, the motor switch (620) is used for controlling the start and stop of the motor, the electromagnetic valve manual switch (630) is used for controlling the opening and closing of the electromagnetic valve (1131), and the fan switch (640) is used for controlling the start and stop of the fan.

5. A food inspection sampling device according to any one of claims 1 to 3, wherein A first annular sealing ring (114) is arranged on the annular side wall of the embedding groove (110), a reinforced mounting seat (220) is fixedly sleeved on the lower end of the sample preparation cavity (200), the bottom end surface of the reinforced mounting seat (220) is in contact with the top surface of the embedding groove (110), an annular folded edge (221) is arranged on the top end of the reinforced mounting seat (220) and outwardly distributed and in contact with the first annular sealing ring (114), and a reserved hole is formed in the bottom end of the reinforced mounting seat (220) for the tapering blanking end (210) to pass out.

6. The food inspection specimen preparation device of claim 5, wherein, An annular groove (230) is arranged on the top end of the sample preparation cavity (200), an annular boss (310) is arranged on the bottom end of the upper cover (300) and matched with the annular groove (230), a second annular sealing ring (231) is embedded on the inner side of the annular groove (230), and the second annular sealing ring (231) is used for sealing the connection between the sample preparation cavity (200) and the upper cover (300) when the upper cover (300) is buckled with the sample preparation cavity (200).

7. The food inspection specimen preparation device of claim 2, wherein, The one-way valve (1121) is a spring type one-way valve or a rubber membrane type one-way valve.

8. The food inspection sampling device of any one of claims 1-3, wherein, The fan installed in the base (100) is a variable speed fan capable of adjusting the wind speed.

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