A heavy metal detection device for food processing

Abstract

This invention provides a heavy metal detection device for food processing, relating to the field of food testing technology. The device includes a housing with a through-door extending to the interior on one side of its outer surface. A test tube rack is inserted inside the rack, and multiple test tubes with material support functions are evenly arranged on it. A transverse moving assembly is fixedly installed on the inner top of the housing, and a lifting frame is fixedly connected to the movable end of the transverse moving assembly. By using an integrated industrial control computer to programmatically control the coordinated operation of the transverse moving assembly, the lifting frame, the vacuum gripping assembly, and the vibration assembly, the device accurately controls the immersion time, draining process, and color development settling time of the test strips. This completely eliminates the problem of inconsistent reaction levels caused by timing deviations in manual operation, ensuring that each sample is processed under identical conditions, thereby greatly improving the accuracy and repeatability of the detection data.

Description

Technical Field

[0001] This invention relates to the field of food testing technology, specifically to a heavy metal detection device for food processing. Background Technology

[0002] In the food processing sector, heavy metal contamination is one of the major risks affecting food safety, with lead contamination receiving widespread attention due to its high toxicity and cumulative effects. Therefore, developing rapid and efficient lead detection technologies is of great significance for protecting consumer health and strengthening production process control.

[0003] Currently, among on-site rapid detection technologies, the test strip method is widely used due to its low cost and ease of operation. The principle of this method is based on a specific chemical colorimetric reaction: the test strip carrier is loaded with a colorimetric agent (such as sodium rhodocyanine or dithizone) that specifically reacts with lead ions. During testing, the food sample needs to undergo complex pretreatment processes such as crushing, extraction, and filtration to obtain the test solution. Then, the reaction area of ​​the test strip is immersed in the test solution, removed, and allowed to stand for a period of time. The color change in the reaction area is observed visually and compared with a standard colorimetric card to make a semi-quantitative estimate of the lead content.

[0004] However, this method has a series of inherent limitations in practical applications, determined by its manual nature, which seriously affect the accuracy, reliability, and repeatability of the detection results: 1. The core steps of the entire testing process, including "immersion time" and "stationary color development time," are entirely controlled manually by the operator. Deviations in time directly affect the extent of the chemical reaction, leading to variations in color intensity, and consequently interfering with the interpretation of the final results. 2. The final test results rely on the operator's subjective comparison of the color of the test strip after reaction with the colorimetric card using the naked eye. The human eye's ability to distinguish colors is easily affected by factors such as ambient light, visual fatigue, and individual physiological differences, making the interpretation results highly subjective. Different operators or the same operator at different times may draw inconsistent conclusions when interpreting the same sample. 3. Even for the testing of a single sample, the operator must complete a series of steps such as soaking, taking out, timing, waiting, and colorimetric analysis, and must manually intervene and wait throughout the reaction process. It is impossible to achieve the "set and leave" operation, which is time-consuming and manpower-intensive.

[0005] Therefore, there is an urgent need in this field for a new technical solution that can retain the convenience of the test strip method while overcoming the aforementioned human error and achieving standardized testing. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a heavy metal detection device for food processing, which solves the problem that existing test strip methods rely heavily on manual operation and subjective interpretation, making it difficult to provide reliable and consistent heavy metal detection data.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention is implemented through the following technical solution: a food processing heavy metal detection device, including a housing, a cabinet door extending through to the interior is opened on one side of the outer surface of the housing, a test tube rack is inserted into the cabinet door, and multiple test tubes with material support function are evenly arranged on the test tube rack; A transverse component is fixedly installed on the inner top of the housing. A lifting frame is fixedly connected to the movable end of the transverse component. A CCD industrial camera is fixedly installed on one side of the movable end of the lifting frame. A vibration component is fixedly connected to the bottom of the lifting frame. A third motor and a deflection block are assembled on the movable end of the vibration component, and the drive end of the third motor is fixedly connected to the deflection block. A vacuum gripping component is installed between the mounting end of the vibration component and the deflection block; The outer side of the casing has a through groove extending to the inner side, and the groove communicates with the bottom of the casing. A test strip box is fastened in the groove, and a handle is fixedly connected to one side of the outer surface of the test strip box. A flexible opening and closing component is installed between the buckle groove and the housing.

[0010] Preferably, guide rails are fixedly connected to the inner walls on both sides of the housing.

[0011] The above technical solution provides guidance for pushing in and pulling out the test tube rack.

[0012] Preferably, the test tube rack includes a closing plate that matches the cabinet door. A handle is fixedly connected to one side of the outer surface of the closing plate, and two brackets are symmetrically fixedly connected to the other side of the closing plate, with the brackets sliding in contact with the guide rail.

[0013] Through the above technical solution, the closing plate can effectively ensure the sealed environment inside the casing after the cabinet door is closed, preventing external pollution.

[0014] Preferably, each of the multiple test tubes with the material support function includes a test tube body, and the test tube body is mounted on two brackets. A test paper tray is fixedly connected to one side of the outer surface of the test tube body, and the test paper tray is attached to the top of the top bracket.

[0015] With the above technical solution, each test tube has its own dedicated test strip tray, which not only avoids the risk of multiple test strips getting mixed up, but also provides a stable placement platform for the test strips after the color reaction.

[0016] Preferably, the transverse assembly includes two bearing seats, and the seats of both bearing seats are fixedly installed on the top of the housing. A first motor is fixedly connected to one side of the seat of each bearing seat. A first screw is fixedly connected to the drive end of the first motor. The inner rings of the bearings built into the two bearing seats are fixedly sleeved on the outer surface of the first screw. A slide is threaded onto the outer surface of the first screw. A slide rod is slidably connected to the slide rod, and the two ends of the slide rod are fixedly connected to the seat of the adjacent bearing seat, respectively.

[0017] The above technical solution constitutes a linear motion module, thereby realizing the horizontal positioning of the lifting frame and other actuators.

[0018] Preferably, the lifting frame includes an assembly frame, which is fixedly installed at the bottom of the slide block. A mounting frame is fixedly connected to the bottom of the assembly frame, and a second motor is fixedly connected to the top of the mounting frame. A second screw is fixedly connected to the drive end of the second motor, and the second screw passes through the mounting frame and is rotatably connected to the mounting frame. A movable frame is threaded onto the outer surface of the second screw, and the movable frame is fixedly connected to a CCD industrial camera. A slide rail is slidably connected to the movable frame, and the slide rail is fixedly connected to the mounting frame.

[0019] The above technical solution provides a vertical drive mechanism to adapt to the height requirements in different steps.

[0020] Preferably, the vibration assembly includes a base plate, which is fixedly connected to the bottom of the movable frame. Four vibrating screen damping springs are symmetrically fixedly connected to the bottom of the base plate. The bottom of the four vibrating screen damping springs are jointly fixedly connected to a mounting base. A third motor is fixedly connected to the mounting base, and a deflection block is rotatably connected to the mounting base. A linear motor is fixedly connected to the top of the mounting base.

[0021] Through the above technical solution, the high-frequency vibration generated by the linear motor is transmitted to the mounting base and test paper in conjunction with the vibration damping spring of the vibrating screen, thereby achieving effective vibration and water drainage.

[0022] Preferably, the vacuum gripping assembly includes a miniature vacuum pump, which is fixedly mounted on one side of the outer surface of the base plate. A three-way solenoid valve is fixedly connected to the input end of the miniature vacuum pump. A flexible tube is fixedly connected to one of the ports of the three-way solenoid valve. A two-way solenoid valve is fixedly connected to the bottom of the flexible tube. A connecting pipe is fixedly connected to the other port of the two-way solenoid valve. The connecting pipe is fixedly mounted on the bottom of the deflection block. A vacuum suction cup is fixedly connected to the bottom of the connecting pipe.

[0023] The above technical solution uses the principle of negative pressure adsorption to grasp the test strip without causing mechanical damage to the test strip.

[0024] Preferably, the elastic opening and closing assembly includes an assembly plate, which is fixedly installed on the inner wall of one side of the housing. A plurality of guide rods are fixedly connected to one side of the outer surface of the assembly plate. A slider is slidably connected to the plurality of guide rods. A plurality of springs are fixedly connected between the slider and the assembly plate, and the springs are sleeved on the outer surface of the guide rods. A sealing plate is fixedly connected to the bottom of one side of the outer surface of the slider, and the sealing plate is sealed and fitted to the top opening of the slot and the test paper box. An auxiliary rod is fixedly connected to one side edge of the top of the sealing plate, and the auxiliary rod matches the movable frame.

[0025] Through the above technical solution, a clever passive opening and closing mechanism was designed. Without the need for additional driving components, it fully utilizes the movement of the transverse component to realize the follow-up opening and closing of the test strip box, effectively preventing the test strip from getting damp or contaminated during non-use periods.

[0026] Preferably, an industrial control computer is fixedly connected to one side of the outer surface of the housing, and an alarm is fixedly connected to one side of the top of the housing.

[0027] Through the above technical solution, the industrial control all-in-one computer integrates display, control and data processing functions. As the brain of the entire device, it provides users with an intuitive human-machine interface and is responsible for executing all automated control logic.

[0028] (III) Beneficial Effects This invention provides a heavy metal detection device for food processing. It has the following beneficial effects: 1. This food processing heavy metal detection device uses an integrated industrial control computer to programmatically control the coordinated operation of the transverse component, lifting frame, vacuum gripping component, and vibration component. This accurately controls the immersion time, draining process, and color development settling time of the test strips, completely eliminating the problem of inconsistent reaction levels caused by timing deviations in manual operation. It ensures that each sample is processed under exactly the same conditions, thereby greatly improving the accuracy and repeatability of the detection data.

[0029] 2. This food processing heavy metal detection device uses a CCD industrial camera to acquire high-definition images of the color-developed test strips, and performs identification and quantitative analysis through an industrial control integrated computer. It overcomes the inherent defects of human eye interpretation being easily affected by ambient light and individual differences, so that the interpretation of test results is based entirely on objective data, significantly improving the fairness and reliability of the test report. 3. This food processing heavy metal detection device achieves full automation from automatic sample loading, accurate immersion, vibration drainage, color development, to final visual interpretation. Operators only need to complete the initial sample loading; afterwards, the equipment automatically completes batch testing, processing multiple samples simultaneously. This completely changes the time-consuming traditional method that relies on manual intervention at every step, significantly improving detection efficiency, reducing labor intensity, and making it suitable for rapid, batch screening needs in food processing.

[0030] 4. The food processing heavy metal detection device adopts a passive design for its elastic opening and closing component. It does not require additional driving components and fully utilizes the movement of the transverse component to realize the follow-up opening and closing of the test strip box, effectively preventing the test strip from getting damp or contaminated during non-use periods. Attached Figure Description

[0031] Figure 1 This is a first-view three-dimensional structural diagram of the present invention; Figure 2 This is a second-view three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of a partial explosion structure of the present invention; Figure 4 This is a cross-sectional perspective view of the three-dimensional structure of the present invention; Figure 5 This is a schematic diagram of the connection structure between the transverse component and the lifting frame from a first-view perspective. Figure 6 This is a schematic diagram of the second-view connection structure between the transverse component and the lifting frame of the present invention; Figure 7 This is a schematic diagram of the connection structure of the lifting frame and vibration component of the present invention; Figure 8 This is a schematic diagram of the connection structure between the vacuum suction cup and the connecting tube of the present invention; Figure 9 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 10 This is a schematic diagram of the connection structure between the elastic opening and closing component and the test paper box of the present invention; Figure 11 For the present invention Figure 4 Enlarged view of point A in the middle.

[0032] The components are as follows: 1. Housing; 11. Alarm; 12. Buckle slot; 13. Cabinet door; 14. Guide rail; 2. Industrial control all-in-one computer; 31. Closing plate; 32. Handle; 33. Bracket; 41. Test paper tray; 42. Test tube body; 5. CCD industrial camera; 61. Assembly plate; 62. Slider; 63. Spring; 64. Sealing plate; 65. Auxiliary rod; 66. Guide rod; 71. Bearing seat; 72. First screw; 73. Slide rod; 74. Slide base; 75. First motor. ; 81. Movable frame; 82. Second motor; 83. Assembly frame; 84. Mounting frame; 85. Second screw; 86. Slide rail; 91. Miniature vacuum pump; 92. Connecting pipe; 93. Two-way solenoid valve; 94. Vacuum suction cup; 95. Three-way solenoid valve; 96. Hoses; 101. Third motor; 102. Deflection block; 111. Base plate; 112. Linear motor; 113. Mounting base; 114. Vibrating screen damping spring; 121. Test paper box; 122. Handle. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figure 1 , Figure 3 , Figure 4 As shown, this embodiment of the invention provides a heavy metal detection device for food processing, including a housing 1. A cabinet door 13 extending through to the interior is provided on one side of the outer surface of the housing 1. A test tube rack is inserted inside the cabinet door 13, and multiple test tubes with material support functions are evenly arranged on the rack. Guide rails 14 are fixedly connected to the inner walls on both sides of the housing 1. The test tube rack includes a closing plate 31, which matches the cabinet door 13. Magnetic sealing strips are embedded in both the door frame of the cabinet door 13 and the outer wall of the closing plate 31. The two magnetic sealing strips attract each other, ensuring the sealing performance of the closing plate 31 on the cabinet door 13. To prevent external contaminants from entering, a handle 32 is fixedly connected to one side of the outer surface of the closing plate 31, and two brackets 33 are symmetrically fixedly connected to the other side of the closing plate 31. The brackets 33 slide in contact with the guide rail 14. Multiple test tubes with material holding function include a test tube body 42, and the test tube body 42 is mounted on the two brackets 33. A test strip tray 41 is fixedly connected to one side of the outer surface of the test tube body 42, and the test strip tray 41 is attached to the top of the top bracket 33. Both the test tube body 42 and the test strip tray 41 are made of disposable sterile transparent plastic.

[0035] like Figure 5 , Figure 6As shown, a transverse moving assembly is fixedly installed on the inner top of the housing 1. The transverse moving assembly includes two bearing seats 71, and the seats of the two bearing seats 71 are fixedly installed on the inner top of the housing 1. A first motor 75 is fixedly connected to one side of the seat of each bearing seat 71. A first screw 72 is fixedly connected to the drive end of the first motor 75. The inner rings of the bearings built into the two bearing seats 71 are fixedly sleeved on the outer surface of the first screw 72. A slide 74 is threaded onto the outer surface of the first screw 72. A slide rod 73 is slidably connected to the slide 74. The two ends of the slide rod 73 are fixedly connected to the seats of the adjacent bearing seats 71. The first motor 75 is a servo motor with a brake, which has a brake holding function. When stopped, it can firmly lock the position to prevent the slide 74 from moving due to vibration or external force, thus ensuring the positioning effect. The slide rod 73 can ensure the stability of the movement of the slide 74.

[0036] like Figure 4 , Figure 5 As shown, a lifting frame is fixedly connected to the movable end of the transverse component. A CCD industrial camera 5 is fixedly mounted on one side of the movable end of the lifting frame. The CCD industrial camera 5 is the "eye" of the system and is typically equipped with a high-resolution sensor, autofocus function, and a ring LED fill light. The fill light provides a uniform, constant, and shadowless lighting environment, eliminating the interference of ambient light changes on color interpretation. The CCD industrial camera 5 is connected to the industrial control all-in-one computer 2 via a GigE interface. The captured test strip images are transmitted to image processing software for real-time analysis, and the heavy metal concentration is quantitatively calculated using a colorimetric algorithm.

[0037] like Figure 6 , Figure 7 As shown, the lifting frame includes an assembly frame 83, which is fixedly installed at the bottom of the slide block 74. A mounting frame 84 is fixedly connected to the bottom of the assembly frame 83, and a second motor 82 is fixedly connected to the top of the mounting frame 84. A second screw 85 is fixedly connected to the drive end of the second motor 82, and the second screw 85 passes through the mounting frame 84 and is rotatably connected to the mounting frame 84. A movable frame 81 is threaded onto the outer surface of the second screw 85, and the movable frame 81 is fixedly connected to the CCD industrial camera 5. A slide rail 86 is slidably connected to the movable frame 81, and the slide rail 86 is fixedly connected to the mounting frame 84. The second motor 82 is a servo motor with a brake, used to control the vertical positioning. The slide rail 86 ensures the stability of the movement of the movable frame 81.

[0038] like Figure 7 , Figure 9As shown, a vibration assembly is fixedly connected to the bottom of the lifting frame. The movable end of the vibration assembly is equipped with a third motor 101 and a deflector block 102. The third motor 101 is a geared stepper motor with a brake, which can accurately control the rotation angle (e.g., 90°). Its braking function ensures that the deflector block 102 can be firmly locked after rotation to the position. The drive end of the third motor 101 is fixedly connected to the deflector block 102. The vibration assembly includes a base plate 111, which is fixedly connected to the bottom of the movable frame 81. Four vibrating screen damping springs 114 are symmetrically fixedly connected to the bottom of the base plate 111. The bottom of the four vibrating screen damping springs 114 is fixedly connected to a mounting base 113. The third motor 101 is fixedly connected to the mounting base 113, and the deflector block 102 is rotatably connected to the mounting base 113. A linear motor 112 is fixedly connected to the top of the mounting base 113. The linear motor 112 is the vibration source and can generate high-frequency, low-amplitude mechanical vibration.

[0039] For example Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, a vacuum gripping assembly is installed between the mounting end of the vibration component and the deflection block 102. The vacuum gripping assembly includes a miniature vacuum pump 91, which is fixedly mounted on one side of the outer surface of the base plate 111. A three-way solenoid valve 95 is fixedly connected to the input end of the miniature vacuum pump 91. A hose 96 is fixedly connected to one of the ports of the three-way solenoid valve 95. A two-way solenoid valve 93 is fixedly connected to the bottom of the hose 96. A connecting pipe 92 is fixedly connected to the other port of the two-way solenoid valve 93. The connecting pipe 92 is fixedly mounted on the bottom of the deflection block 102. A vacuum suction cup 94 is fixedly connected to the bottom of the connecting pipe 92. The miniature vacuum pump 91 generates a negative pressure vacuum. The three-way solenoid valve 95 is used to control the connection between the vacuum circuit and the atmosphere, so as to realize rapid vacuum breaking and release of the test paper.

[0040] For example Figure 10 , Figure 11 As shown, a through-hole 12 is provided on one side of the outer surface of the housing 1, and the through-hole 12 communicates with the bottom of the inner surface of the housing 1. A test strip box 121 is fastened into the through-hole 12. A handle 122 is fixedly connected to one side of the outer surface of the test strip box 121. The test strip box 121 is a sealed container with a desiccant inside, used to protect the test strips from light and moisture, ensuring their expiration date and reactivity. Slots are provided on both sides of the outer surface of the test strip box 121, and protrusions matching the slots are provided on the inner walls of both sides of the through-hole 12, enabling the test strip box 121 to be fastened to the through-hole 12.

[0041] For example Figure 4 , Figure 10As shown, an elastic opening and closing assembly is installed between the buckle groove 12 and the housing 1. The elastic opening and closing assembly includes an assembly plate 61, which is fixedly installed on the inner wall of one side of the housing 1. Multiple guide rods 66 are fixedly connected to one side of the outer surface of the assembly plate 61. The multiple guide rods 66 are slidably connected to a slider 62. Multiple springs 63 are fixedly connected between the slider 62 and the assembly plate 61. The springs 63 are sleeved on the outer surface of the guide rods 66. A sealing plate 64 is fixedly connected to the bottom of one side of the outer surface of the slider 62. The sealing plate 64 is sealed and fitted to the top opening of the buckle groove 12 and the test paper box 121. An auxiliary rod 65 is fixedly connected to the top edge of the sealing plate 64. The auxiliary rod 65 matches the movable frame 81. A polyurethane elastic liner is fixedly embedded in the contact surface between the auxiliary rod 65 and the movable frame 81, which has the advantages of high elasticity, wear resistance, and noise reduction. When the lifting frame is moved laterally towards the assembly plate 61 by the lateral moving component, the movable frame 81 contacts the auxiliary rod 65, pushing the auxiliary rod 65 to move laterally. This, in turn, pushes the entire sealing plate 64 and slider 62 to move laterally against the force of the spring 63, opening the inlet of the test paper box 121. When the lifting frame is moved away from the assembly plate 61 by the lateral moving component, the sealing plate 64 automatically resets under the action of the spring 63, resealing the test paper box. This structure requires no additional power and achieves a moisture-proof function of "opening when needed and closing when finished".

[0042] Figure 1 , Figure 2 , Figure 3 As shown, an industrial control all-in-one computer 2 is fixedly connected to one side of the outer surface of the housing 1, and an alarm 11 is fixedly connected to the top side of the housing 1. The industrial control all-in-one computer 2 is electrically connected to the alarm 11, the CCD industrial camera 5, the first motor 75, the miniature vacuum pump 91, the two-way solenoid valve 93, the three-way solenoid valve 95, the third motor 101, and the linear motor 112. The industrial control all-in-one computer 2 integrates an industrial computer, a touch screen display, and control circuitry. Its internal software not only controls the coordinated workflow of all motors, solenoid valves, cameras, and motors, but also integrates professional image processing algorithms, which can automatically analyze colors, judge results, generate detection reports, and trigger alarms when standards are exceeded. The alarm 11 is an audible and visual alarm.

[0043] Step 1: Preparation and Sample Setting: The operator opens cabinet door 13 and pulls out test tube rack consisting of closing plate 31 and two brackets 33 by using handle 32.

[0044] The pretreated food sample liquid is added one by one into multiple test tube bodies 42. Then the test tube rack is pushed back into the machine housing 1 along the guide rail 14. The cabinet door 13 is closed by the closing plate 31, allowing the sample to stand in a sealed environment for a period of time before testing.

[0045] Step 2: Automatic test strip dispensing and angle adjustment: After the static period is complete, the control and detection program of the industrial control all-in-one computer 2 is started.

[0046] The first motor 75 drives the first screw 72 to rotate, which in turn moves the slide block 74 along the slide rod 73, thereby moving the entire lifting frame and other actuators above the test paper box 121.

[0047] During this process, when the movable frame 81 touches the auxiliary rod 65, it will push the sealing plate 64 and the slider 62 to move laterally, compressing the spring 63 until the test paper box 121 is completely exposed.

[0048] The second motor 82 drives the second screw 85 to rotate, causing the movable frame 81 to descend along the slide rail 86. The movable frame 81 drives the vibration component, deflection block 102, and vacuum gripping component to descend, allowing the vacuum suction cup 94 to adhere to the handheld end of the top test paper in the test paper box 121. Then, the micro vacuum pump 91 generates negative pressure, which is transmitted to the vacuum suction cup 94 through the three-way solenoid valve 95, hose 96, two-way solenoid valve 93, and connecting pipe 92, thus picking up and fixing the top test paper.

[0049] Then, the lifting frame drives the connected components to rise and reset, and the lateral movement component drives the lifting frame and other actuators to move laterally. As the movable frame 81 moves away from the assembly plate 61, the slider 62 and the sealing plate 64 reset under the action of the spring 63, and immediately reseal the test paper box 121, effectively preventing the remaining test paper in the box from getting damp or contaminated.

[0050] Once the movable frame 81 is completely disengaged from the auxiliary rod 65, the third motor 101 starts, driving the deflection block 102 to rotate 90 degrees, thereby changing the test paper from a horizontal state to a vertical state through the vacuum suction cup 94 connected to the connecting tube 92, preparing for the immersion operation.

[0051] Step 3: Soaking and Vibrating to Drain Water: The horizontal movement component and the lifting component work together again to accurately move the vertically positioned test strip and lower it below the liquid surface of the target test tube body 42 for immersion. The immersion time is controlled by the industrial control integrated computer 2.

[0052] After the soaking is completed, the lifting component controls the movable frame 81 to lift the test paper up a little bit, so that it is detached from the liquid surface but still inside the test tube body 42.

[0053] The linear motor 112 operates, transmitting high-frequency vibrations to the mounting base 113 via the vibration damping spring 114, which in turn drives the vacuum suction cup 94 and the test paper to perform high-frequency micro-amplitude vibrations, achieving vibration drainage, removing excess reaction liquid from the test paper, and ensuring color development consistency.

[0054] Step 4: Reset and allow the color to develop: After the water draining is complete, the lifting frame is fully reset. Then, the third motor 101 reverses again, driving the deflection block 102 to rotate 90 degrees, changing the test paper from a vertical state back to a horizontal state.

[0055] Then, the horizontal moving component works with the lifting frame to place the test strip horizontally back onto the test strip tray 41 corresponding to the test tube body 42. Subsequently, the three-way solenoid valve 95 switches the passage, allowing the hose 96 to communicate with the interface without the pipe installed, allowing air to enter the hose 96, the two-way solenoid valve 93, the connecting pipe 92 and the vacuum suction cup 94, thereby releasing the adsorption on the test strip and realizing the placement of the test strip.

[0056] The test strip is placed on the test strip tray 41 to allow for the color development reaction. The color development time is accurately controlled by the industrial control integrated machine 2.

[0057] Step 5: Loop Detection and Visual Interpretation: The vacuum gripping assembly, vibration assembly, and lifting frame, in conjunction with the lateral movement assembly, repeat the above operations (steps two to four) until the test paper impregnation and placement of all samples are completed.

[0058] Once all the test strips have reached their color development time, the horizontal movement assembly moves the CCD industrial camera 5 on the lifting frame to above the first test strip.

[0059] The lifting assembly adjusts the height of the CCD industrial camera 5 to obtain the best viewing angle and focal length. The CCD industrial camera 5 acquires high-definition images of the color-developed test paper and transmits the data back to the industrial control all-in-one computer 2.

[0060] Subsequently, the transverse component, in conjunction with the CCD industrial camera 5, performs visual inspection on each test strip on the tray 33. The image analysis software within the industrial control all-in-one computer 2 intelligently identifies and quantitatively analyzes the colors, ultimately displaying and determining whether the heavy metal content exceeds the standard. If it does, the alarm 11 sounds an alarm.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heavy metal detection device for food processing, comprising a housing (1), characterized in that: The outer surface of the casing (1) is provided with a cabinet door (13) that extends into the interior. A test tube rack is inserted into the cabinet door (13), and multiple test tubes with material support function are evenly arranged on the test tube rack. A transverse component is fixedly installed on the inner top of the housing (1). A lifting frame is fixedly connected to the movable end of the transverse component. A CCD industrial camera (5) is fixedly installed on one side of the movable end of the lifting frame. A vibration component is fixedly connected to the bottom of the lifting frame. A third motor (101) and a deflection block (102) are assembled on the movable end of the vibration component. The drive end of the third motor (101) is fixedly connected to the deflection block (102). A vacuum gripping component is installed between the mounting end of the vibration component and the deflection block (102); The outer side of the casing (1) is provided with a through groove (12) extending to the inner side, and the groove (12) communicates with the bottom of the casing (1). A test paper box (121) is fastened in the groove (12), and a handle (122) is fixedly connected to one side of the outer surface of the test paper box (121). An elastic opening and closing component is installed between the buckle groove (12) and the housing (1).

2. The food processing heavy metal detection device according to claim 1, characterized in that: Guide rails (14) are fixedly connected to the inner walls on both sides of the housing (1).

3. The heavy metal detection device for food processing according to claim 2, characterized in that: The test tube rack includes a closing plate (31), which matches the cabinet door (13). A handle (32) is fixedly connected to one side of the outer surface of the closing plate (31), and two brackets (33) are symmetrically fixedly connected to the other side of the closing plate (31). The brackets (33) slide in contact with the guide rail (14).

4. The heavy metal detection device for food processing according to claim 3, characterized in that: Each of the multiple test tubes with the material support function includes a test tube body (42), and the test tube body (42) is mounted on two brackets (33). A test paper tray (41) is fixedly connected to one side of the outer surface of the test tube body (42), and the test paper tray (41) is attached to the top of the top bracket (33).

5. The heavy metal detection device for food processing according to claim 1, characterized in that: The transverse assembly includes two bearing seats (71), and the seats of the two bearing seats (71) are fixedly installed on the top of the housing (1). A first motor (75) is fixedly connected to one side of the seat of a single bearing seat (71). A first screw (72) is fixedly connected to the drive end of the first motor (75). The inner rings of the bearings built into the two bearing seats (71) are fixedly sleeved on the outer surface of the first screw (72). A slide (74) is threaded onto the outer surface of the first screw (72). A slide rod (73) is slidably connected to the slide rod (74), and both ends of the slide rod (73) are fixedly connected to the seats of the adjacent bearing seats (71).

6. The heavy metal detection device for food processing according to claim 5, characterized in that: The lifting frame includes an assembly frame (83), which is fixedly installed at the bottom of the slide (74). The bottom of the assembly frame (83) is fixedly connected to a mounting frame (84). The top of the mounting frame (84) is fixedly connected to a second motor (82). The drive end of the second motor (82) is fixedly connected to a second screw (85). The second screw (85) passes through the mounting frame (84) and is rotatably connected to the mounting frame (84). The outer surface of the second screw (85) is threaded with a movable frame (81). The movable frame (81) is fixedly connected to the CCD industrial camera (5). The movable frame (81) is slidably connected to a slide rail (86), and the slide rail (86) is fixedly connected to the mounting frame (84).

7. The heavy metal detection device for food processing according to claim 6, characterized in that: The vibration assembly includes a base plate (111), which is fixedly connected to the bottom of the movable frame (81). Four vibrating screen damping springs (114) are symmetrically fixedly connected to the bottom of the base plate (111). The bottom of the four vibrating screen damping springs (114) is fixedly connected to a mounting base (113). A third motor (101) is fixedly connected to the mounting base (113), and a deflection block (102) is rotatably connected to the mounting base (113). A linear motor (112) is fixedly connected to the top of the mounting base (113).

8. The heavy metal detection device for food processing according to claim 7, characterized in that: The vacuum gripping assembly includes a miniature vacuum pump (91), which is fixedly installed on one side of the outer surface of the base plate (111). The input end of the miniature vacuum pump (91) is fixedly connected to a three-way solenoid valve (95). One of the interfaces of the three-way solenoid valve (95) is fixedly connected to a hose (96). The bottom of the hose (96) is fixedly connected to a two-way solenoid valve (93). The other interface of the two-way solenoid valve (93) is fixedly connected to a connecting pipe (92). The connecting pipe (92) is fixedly installed at the bottom of the deflection block (102). The bottom of the connecting pipe (92) is fixedly connected to a vacuum suction cup (94).

9. A heavy metal detection device for food processing according to claim 5, characterized in that: The elastic opening and closing assembly includes an assembly plate (61), which is fixedly installed on the inner wall of one side of the housing (1). A plurality of guide rods (66) are fixedly connected to one side of the outer surface of the assembly plate (61). The plurality of guide rods (66) are slidably connected to a slider (62). A plurality of springs (63) are fixedly connected between the slider (62) and the assembly plate (61). The springs (63) are sleeved on the outer surface of the guide rods (66). A sealing plate (64) is fixedly connected to the bottom of one side of the outer surface of the slider (62). The sealing plate (64) is sealed and fitted to the top opening of the buckle groove (12) and the test paper box (121). An auxiliary rod (65) is fixedly connected to one side edge of the top of the sealing plate (64). The auxiliary rod (65) matches the movable frame (81).

10. A heavy metal detection device for food processing according to claim 1, characterized in that: An industrial control computer (2) is fixedly connected to one side of the outer surface of the housing (1), and an alarm (11) is fixedly connected to one side of the top of the housing (1).

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