A detection device for compressed biscuits

Abstract

The utility model discloses a kind of detection devices of compressed biscuit, including foreign matter detection mechanism and weighing detection mechanism sequentially arranged along detection conveyor belt, is provided in the reject mechanism of sorting conveyor belt, and reject mechanism includes oppositely arranged air blowing assembly and material collecting box, air blowing assembly includes air blowing head, connecting pipe, air inlet pipe and mounting seat, air blowing head end is equipped with flat and close to the air nozzle of conveyor belt surface, connecting pipe is equipped with gas control valve in and is fixed to the side of sorting conveyor belt through mounting seat, gas control valve is used to control airflow on-off according to detection result, material collecting box is equipped with at least one, for collecting defective product. The utility model is through in order, foreign matter detection mechanism and weighing detection mechanism are sequentially arranged and are linked to detect, and share reject mechanism, and by setting close to the air blowing assembly of conveyor belt surface, with compact structure, site saving, conveyor belt cleanliness is high, maintenance frequency is low.

Description

Technical Field

[0001] This utility model belongs to the field of food testing technology, and specifically relates to a testing device for compressed biscuits. Background Technology

[0002] Compressed biscuits are mostly used for emergency food or outdoor activities, and have high requirements for product shape integrity, compaction density, and foreign matter status. Among them, shape integrity and compaction density are generally determined after the molding process, and defects can be identified by checking the weight of the compressed biscuit. Foreign matter in compressed biscuits generally refers to metal impurities, which mainly come from metal fragments that may be generated in processes such as crushing and mixing using metal equipment. Generally, metal detection equipment is used before packaging to identify and remove compressed biscuits containing metal impurities.

[0003] In current compressed biscuit production processes, weighing and inspection are mostly set after the forming process, while metal foreign object detection is set before film packaging. The two are set up independently on the conveyor line and are inspected independently. However, on the one hand, each process needs to set up inspection equipment and defective rejection mechanism, and may even need to set up multiple foreign object detection sections to ensure that metal foreign objects are completely detected. This results in longer conveyor lines, more production cycles, large space occupation, and slow production efficiency. On the other hand, the defective products rejected in the previous weighing and inspection process may include compressed biscuits carrying metal foreign objects, so the defective products cannot be directly reused and need to be processed again.

[0004] In addition, most existing defect rejection mechanisms use mechanical pushers to push defective products away from the conveyor belt with a certain speed and force. This can easily cause the biscuit surface to bump and bruise, resulting in residual crumbs on the conveyor belt. These crumbs tend to accumulate at the end of the conveyor belt and stick to the good compressed biscuits, affecting the product's appearance quality. This also requires a higher frequency of conveyor belt cleaning. Utility Model Content

[0005] The purpose of this invention is to provide a testing device for compressed biscuits, in order to solve the problems of existing compressed biscuit manufacturing processes that require separate weighing and metal foreign object detection steps before film coating, which occupy a large production area, restrict production efficiency, and require secondary processing of defective products before they can be reused.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model proposes a detection device for compressed biscuits, the structure of which includes a feeding conveyor belt, a detection conveyor belt and a sorting conveyor belt arranged in sequence;

[0008] The inspection conveyor belt is equipped with a foreign object detection mechanism and a weighing detection mechanism sequentially along the conveying direction, used for foreign object detection and weight detection, respectively. The sorting conveyor belt is equipped with a rejection mechanism, used to sequentially reject defective products with foreign objects and products with weight defects. The rejection mechanism includes an air blowing assembly, a collection box, and a mounting base located on both sides of the sorting conveyor belt. The air blowing assembly includes an air blowing head, a connecting pipe, and an air inlet pipe. The air blowing head has a flat nozzle at its end, positioned close to the surface of the sorting conveyor belt. The air blowing head is connected to an external air source sequentially through the connecting pipe and the air inlet pipe. The connecting pipe is located on the mounting base and contains a gas control valve. The gas control valve is signal-connected to the foreign object detection mechanism and the weighing detection mechanism to control the airflow. The mounting base is fixed to the side of the sorting conveyor belt, and at least one collection box is provided for collecting defective products.

[0009] Based on the above technical solutions, by sequentially and continuously setting up foreign object detection mechanisms and weighing detection mechanisms for linkage detection, and by having the two types of detection mechanisms share a set of rejection mechanisms, the occupation of the production site by the detection process is effectively reduced, which is conducive to the compact design of the production line. At the same time, by setting up an air blowing component close to the surface of the sorting conveyor belt, defective products can be wrapped and transported by airflow, which effectively avoids the generation of additional biscuit crumbs during rejection, and the air blowing can further ensure the cleanliness of the conveyor belt, reducing the frequency and difficulty of conveyor belt cleaning.

[0010] Preferably, the bottom surface of the collection box is lower than the upper surface of the sorting conveyor belt, and the collection box is provided with a splash-proof protective cover. The opening of the protective cover faces the sorting conveyor belt and is opposite to the air blowing component. This design is intended to facilitate the smooth entry of defective products into the collection box for collection.

[0011] Preferably, the rejection mechanism is provided in two sets, each set of which is provided with a collection box. The rejection mechanism corresponds one-to-one with the foreign object detection mechanism and the weighing detection mechanism. Along the conveying direction, the rejection mechanism at the front is used to reject defective products containing foreign objects, and the rejection mechanism at the rear is used to reject defective products that are not weighed. This design can effectively reduce the amount of secondary processing of defective products and improve the efficiency of defective product processing by prioritizing the rejection of compressed biscuits containing foreign objects and then rejecting compressed biscuits that are only defective in weighing.

[0012] Preferably, the rejection mechanism is configured as a set, the bottom surface of the collection box is a downward slope, the end of the slope is provided with two independent slides, the connection between the end of the slope and the slide is provided with a movable baffle, the movable baffle is used to control defective products to enter the corresponding slide, the end of the slide is provided with a classification collection box, the classification collection box is used to collect defective products of the corresponding type. The advantage of this design is that it further simplifies the structural design of the rejection mechanism, facilitates further shortening of the length of the sorting conveyor belt, and makes full use of the idle space under the conveyor belt, which is conducive to improving the space utilization rate of the production site.

[0013] More preferably, there are two movable baffles corresponding to the slides. The ends of the movable baffles abut against each other and are arranged in a V-shape. When opened, the movable baffles open into the corresponding slides. The purpose of this design is to allow defective products to enter the slides smoothly and not accumulate in the collection box.

[0014] More preferably, the fixed end of the movable baffle is located at the boundary of the slide, and the movable end of the movable baffle can swing left and right to open or close one of the slides accordingly. This design helps to reduce the setting of mechanical structures, thereby simplifying the production line setup.

[0015] Preferably, the air nozzle is arc-shaped, and a strip-shaped slit is provided near the lower part of the sorting conveyor belt. The upper part of the air nozzle is provided with evenly distributed air outlets. The purpose of this design is to create a lifting airflow between the defective products and the surface of the sorting conveyor belt through the setting of the strip-shaped slit, thereby reducing the movement resistance. The evenly distributed air outlets create a moving driving force for the defective products, thereby achieving non-contact rejection of defective products. This effectively avoids the risk of collision and debris falling off in mechanical rejection and helps maintain the surface cleanliness of the sorting conveyor belt.

[0016] Preferably, the mounting base includes a fixed block, an adjusting rod, and a support block. The fixed block is fixedly connected to the sorting conveyor belt. The adjusting rod is disposed on the fixed block and can be adjusted up and down relative to the fixed block. The support block is disposed on the adjusting rod and can be rotated relative to the adjusting rod. The connecting pipe is fixedly disposed on the support block. The purpose of this design is to enable the air blowing assembly to be adaptively adjusted according to the product type and conveying speed, thereby better matching changes in production efficiency.

[0017] Preferably, the detection conveyor belt has two parallel diversion conveyor belts with the same speed at the location of the weighing and detection mechanism. The weighing and detection mechanism is set on one of the diversion conveyor belts for weighing compressed biscuits that do not contain foreign objects. The front end of the diversion conveyor belt is provided with a movable lever, which is used to guide the compressed biscuits to the corresponding diversion conveyor belts according to the foreign object detection results. The rear ends of the diversion conveyor belts are connected to the sorting conveyor belt. The purpose of this design is to pre-sort the foreign object detection results of the first stage by setting up parallel diversion conveyor belts, so that defective products can directly enter the rejection process, and good products enter the weighing and detection mechanism for detection. This can effectively reduce the load on the weighing and detection mechanism, thereby improving the overall efficiency of the detection process.

[0018] Preferably, the front end of the sorting conveyor belt is provided with a guide structure, which is used to guide the compressed biscuits conveyed by the diversion conveyor belt to the center position of the sorting conveyor belt.

[0019] Beneficial effects

[0020] One of the above technical solutions has the following advantages or beneficial effects:

[0021] 1) By sequentially and continuously setting up foreign object detection mechanisms and weighing detection mechanisms for linkage detection, and by having the two types of detection mechanisms share a set of rejection mechanisms, the occupation of the production site by the detection process is effectively reduced, which is conducive to the compact design of the production line. At the same time, by setting up an air blowing component close to the surface of the sorting conveyor belt, defective products can be wrapped and transported by airflow, which effectively avoids the generation of extra biscuit crumbs during rejection. Furthermore, the air blowing can ensure the cleanliness of the conveyor belt, reducing the frequency and difficulty of conveyor belt cleaning. The overall detection device has the characteristics of compact structure, space saving, high cleanliness and low maintenance frequency.

[0022] 2) By setting the rejection mechanism as a group and setting an independent slide and classification collection box at the end of the collection box, the structural design of the rejection mechanism is further simplified, which is conducive to further shortening the length of the sorting conveyor belt and making full use of the idle space under the conveyor belt, which is more conducive to improving the space utilization rate of the production site.

[0023] 3) By setting the air nozzle to an arc shape and setting a strip slit at the bottom to form a lifting airflow, and evenly distributing air holes at the top to form thrust, non-contact rejection of defective products is achieved, effectively avoiding the risk of collision and debris falling due to mechanical rejection, which is more conducive to maintaining the surface cleanliness of the sorting conveyor belt, reducing the frequency of downtime for cleaning, and preventing the occurrence of residue mixed in with good products, thereby improving the level of product quality control.

[0024] 4) By setting up parallel diversion conveyor lines in the weighing and inspection section, the detected foreign objects and defective products can skip the weighing and inspection step and directly enter the rejection process. Only good products enter the weighing and inspection mechanism for inspection, which can effectively reduce the load on the weighing and inspection mechanism, thereby shortening the production cycle and improving the overall efficiency of the inspection process. Attached Figure Description

[0025] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0027] Figure 2 This is a schematic diagram of the air blowing component structure according to Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the air nozzle structure according to Embodiment 1 of this utility model;

[0029] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model;

[0030] Figure 5 This is a schematic diagram of the movable baffle structure in Embodiment 2 of this utility model. Figure 1 ;

[0031] Figure 6 This is a schematic diagram of the movable baffle structure in Embodiment 2 of this utility model. Figure 2 ;

[0032] In the diagram: 101 feeding conveyor belt; 102 inspection conveyor belt; 103 sorting conveyor belt; 104 diversion conveyor belt; 105 movable lever; 106 guide structure; 1 foreign object detection mechanism; 2 weighing detection mechanism; 3 rejection mechanism; 31 air blowing assembly; 311 air nozzle; 312 air blowing head; 313 connecting pipe; 314 air inlet pipe; 3111 strip slit; 3112 air outlet; 32 collection box; 33 mounting base; 331 fixing block; 332 adjusting rod; 333 support block; 34 protective cover; 4 slide rail; 5 movable baffle; 6 sorting collection box. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0034] Example 1

[0035] like Figure 1As shown, this utility model provides a detection device for compressed biscuits, the structure of which includes a feeding conveyor belt 101, a detection conveyor belt 102 and a sorting conveyor belt 103 arranged in sequence. The feeding conveyor belt 101 is used to control the interval of incoming compressed biscuits to facilitate subsequent detection. The detection conveyor belt 102 is used to install detection equipment. The sorting conveyor belt 103 is used to install a defective product rejection mechanism 3 to achieve the separation of defective and good compressed biscuits.

[0036] Specifically, the inspection conveyor belt 102 is sequentially equipped with a foreign object detection mechanism 1 and a weighing detection mechanism 2 along the conveying direction, which are used for foreign object detection and weight detection, respectively. The foreign object detection mechanism 1 is a metal detector, and the weighing detection mechanism 2 is a weighing conveyor belt. The sorting conveyor belt 103 is equipped with a rejection mechanism 3, which is used to reject compressed biscuits containing foreign objects and those that are not properly weighed. Preferably, in this embodiment, there are two sets of rejection mechanisms 3, each set of which is equipped with a collection box 32. The rejection mechanisms 3 correspond one-to-one with the foreign object detection mechanism 1 and the weighing detection mechanism 2. Along the conveying direction, the rejection mechanism 3 at the front is used to reject defective products containing foreign objects, prioritizing the rejection of compressed biscuits containing foreign objects. These defective products undergo secondary processing to determine whether they can be reused. The rejection mechanism 3 at the rear is used to reject products that are not properly weighed. These defective products are directly reused in the crushing process, thereby reducing the amount of secondary processing of defective products and improving the efficiency of defective product processing.

[0037] The specific structure of the rejection mechanism 3 is as follows: it includes an air blowing assembly 31, a collection box 32, and a mounting base 33. The air blowing assembly 31 and the collection box 32 are respectively arranged opposite each other on both sides of the sorting conveyor belt 103. Figure 2 As shown, the air blowing assembly 31 includes an air blowing head 312, a connecting pipe 313, and an air inlet pipe 314. The air blowing head 312 has a flat nozzle 311 at its end, which is positioned close to the surface of the sorting conveyor belt 103. The air blowing head 312 is connected to an external air source via the connecting pipe 313 and the air inlet pipe 314. The external air source has a certain pressure, which can push the compressed biscuit to move laterally. The connecting pipe 313 is mounted on the mounting base 33 and contains a gas control valve (not shown in the figure). The gas control valve is signal-connected to the foreign object detection mechanism 1 and the weighing detection mechanism 2 to control the airflow. The mounting base 33 is fixed to the side of the sorting conveyor belt 103. At least one collection box 32 is provided for collecting defective products. The nozzle 311 can be a narrow slit 3111 or evenly distributed air outlets 3112. Preferably, as... Figure 3As shown, in this embodiment, the air nozzle 311 is arc-shaped, and the lower part of the air nozzle 311 is provided with a strip-shaped slit 3111 close to the sorting conveyor belt 103 to form a lifting airflow between the defective products and the surface of the sorting conveyor belt 103, thereby reducing the moving resistance; the upper part of the air nozzle 311 is provided with uniformly distributed air outlet holes 3112 to form a lateral moving thrust for the defective products, thereby realizing non-contact rejection of defective products, avoiding the risk of collision and debris falling due to mechanical rejection, and thus maintaining the surface cleanliness of the sorting conveyor belt 103.

[0038] Preferably, the bottom surface of the collection box 32 is lower than the upper surface of the sorting conveyor belt 103. The collection box 32 is provided with a splash-proof protective cover 34. The opening of the protective cover 34 faces the sorting conveyor belt 103 and is opposite to the air blowing component 31, so as to facilitate the smooth entry of defective products into the collection box 32 and prevent them from flying out of the collection box due to airflow, especially the debris, thus avoiding pollution of the production site.

[0039] Preferably, in order to enable the air blowing assembly 31 to adaptively adjust according to product type and conveying speed, and better match changes in production efficiency, such as... Figure 2 As shown, the mounting base 33 is structured as follows: it includes a fixing block 331, an adjusting rod 332, and a support block 333. The fixing block 331 is fixedly connected to the sorting conveyor belt 103 to form a support; the adjusting rod 332 is disposed on the fixing block 331 and can be adjusted up and down relative to the fixing block 331 so that the air blower 312 can be adjusted to the height of the air blower from the surface of the sorting conveyor belt 103, thereby allowing the blown airflow to effectively wrap the entire compressed biscuit; the support block 333 is disposed on the adjusting rod 332 and can be adjusted up and down relative to the fixing block 331 so that the air blower 312 can be adjusted to the height of the air blower 312 from the surface of the sorting conveyor belt 103, thereby allowing the blown airflow to effectively wrap the entire compressed biscuit; the support block 333 is disposed on the adjusting rod 332 and can be adjusted up and down relative to the fixing block 331. The connecting pipe 313 is fixedly mounted on the support block 333 and can be rotated relative to the adjusting rod 332. The rotation angle of the support block 333 can make the air nozzle 311 blow air at different angles to match the conveying speed and prevent defective products from falling into the collection box 32 accurately. In actual use, the air blowing component 31 is set slightly behind the collection box 32, and the air blowing direction of the air nozzle 311 is tilted at a certain angle relative to the opposite direction of the sorting conveyor belt 103. The tilt angle is determined according to the conveying speed.

[0040] During operation, the compressed biscuits are sequentially inspected by the foreign object detection mechanism 1 and the weighing detection mechanism 2. When a defective product containing foreign objects is detected, the foreign object detection mechanism 1 generates a defect signal and transmits it to the gas control valve of the first set of rejection mechanisms 3. This set of gas control valves calculates the time point when the defective product reaches the rejection position based on the conveying distance and conveying speed, and controls the air blowing component 31 to spray airflow at that time point, so that all defective products containing foreign objects enter the corresponding collection box 32 for collection. When a defective product containing weighing defects is detected, the weighing detection mechanism 2 generates a defect signal and transmits it to the gas control valve of the second set of rejection mechanisms 3. This set of gas control valves simultaneously receives the detection result signal from the foreign object detection mechanism 1. When it is determined that the compressed biscuit is a good product without foreign objects and is a defective product with weighing defects, the time point when the defective product reaches the rejection position is calculated based on the conveying distance and conveying speed, and the air blowing component 31 is controlled to spray airflow at that time point, so that all defective products containing weighing defects enter the corresponding collection box 32 for collection, thus completing the entire inspection process.

[0041] The advantages of this embodiment are as follows: by sequentially and continuously setting up the foreign object detection mechanism 1 and the weighing detection mechanism 2 for linkage detection, and by having the two types of detection mechanisms share a set of rejection mechanism 3, the setting of a section of the feeding conveyor belt 101 is reduced, and the layout between the foreign object detection mechanism 1 and the weighing detection mechanism 2, as well as between the two sets of rejection mechanisms 3, can be more compact, effectively reducing the occupation of the production site by the detection process and facilitating the compact design of the production line; at the same time, by setting up the air blowing component 31 close to the surface of the sorting conveyor belt 103, the material collection box 32 with its bottom surface lower than the surface of the sorting conveyor belt 103, and the specially designed air nozzle 311, a non-contact airflow is formed to envelop and transport defective products, which not only has high rejection efficiency, but also effectively avoids the generation of additional biscuit crumbs during rejection, and further ensures the cleanliness of the conveyor belt, reduces the frequency and difficulty of conveyor belt cleaning, and also helps to improve the product quality control level (avoiding residues adhering to good products, resulting in poor quality).

[0042] Example 2

[0043] like Figure 4 As shown, this embodiment provides a device for detecting compressed biscuits, which differs from Embodiment 1 in that:

[0044] The rejection mechanism 3 is set as a group. The bottom surface of the collection box 32 is a downward slope. Two independent slides 4 are provided at the end of the slope. A movable baffle 5 is provided at the connection between the end of the slope and the slide 4. The movable baffle 5 is used to control the defective products to enter the corresponding slide 4. A classification collection box 6 is provided at the end of the slide 4. The classification collection box 6 is used to collect defective products of the corresponding type. The movable baffle 5 is driven by a rotary motor (not shown in the figure) to achieve position switching.

[0045] As a preferred implementation method, such as Figure 5 As shown, there are two movable baffles 5 corresponding to the slide rails 4. The ends of the movable baffles 5 are in contact with each other and are arranged in a V-shape. When opened, the movable baffles 5 open into the corresponding slide rails 4. The inclined surface formed by the V-shape allows defective products to smoothly enter the corresponding slide rails 4, and they are less likely to accumulate in the collection box 32, causing mixing of different types of defective products.

[0046] As another preferred implementation, such as Figure 6 As shown, the fixed end of the movable baffle 5 is located at the boundary of the slide 4. The movable baffle 5 is linked with the rejection mechanism 3. Depending on the type of defective product being rejected, the movable end of the movable baffle 5 can swing left and right to open or close one of the slides 4. In actual use, the movable baffle 5 is fixedly closed on a certain slide 4. When a defective product type corresponding to the closed slide 4 is received, it swings to another slide 4, thereby enabling the defective product to smoothly enter the corresponding slide 4 and the sorting collection box 6.

[0047] Furthermore, such as Figure 5 As shown, the detection conveyor belt 102 has two parallel diversion conveyor belts 104 with the same speed at the location of the weighing detection mechanism 2. The weighing detection mechanism 2 is installed on one of the diversion conveyor belts 104. The weighing detection mechanism 2 and the diversion conveyor belt 104 it is on form a weighing track for weighing compressed biscuits without foreign objects. The front end of the diversion conveyor belt 104 is provided with a movable lever 105. The movable lever 105 is used to guide the compressed biscuits to the corresponding diversion conveyor belt 104 according to the foreign object detection result. That is, the compressed biscuits without foreign objects are guided to the diversion conveyor belt 104 with the weighing detection mechanism 2, and the compressed biscuits containing foreign objects are guided to the other diversion conveyor belt. On the conveyor belt 104, the movable baffle 5 is driven by a rotary motor (not shown in the attached diagram) to switch positions. In actual setup, the movable lever 105 is by default in the closed diversion conveyor belt 104 without a weighing detection mechanism 2. The rear ends of the two diversion conveyor belts 104 are connected to the sorting conveyor belt 103. The front end of the sorting conveyor belt 103 is provided with a guide structure 106. The guide structure 106 is used to guide the compressed biscuits conveyed by the diversion conveyor belts 104 to the center position of the sorting conveyor belt 103. Because the conveying speed of the diversion conveyor belts 104 is the same, the compressed biscuits will not overlap in position after converging on the sorting conveyor belt 103, thus not interfering with the subsequent rejection mechanism 3's judgment of defective products and defect types. Furthermore, to avoid this problem, the sorting conveyor belt 103 can also be extended to the front of the rejection mechanism 3, so that the good products after the rejection action is completed can then converge into the next process.

[0048] During operation, the compressed biscuits first pass through the foreign object detection mechanism 1 for inspection. The foreign object detection mechanism 1 transmits the foreign object detection result signal to the gas control valve and the movable lever 105. When the foreign object detection result is good, the movable lever 105 does not move, and the good biscuits enter the weighing and inspection mechanism 2 for inspection, transmitting the weighing and inspection result signal to the gas control valve. When the foreign object detection result is defective, the movable lever 105 turns to the diversion conveyor belt 104 where the closed weighing mechanism is located, causing the defective biscuits to enter the parallel diversion conveyor belt 104 and flow directly to the rejection mechanism 3 for rejection. When the rejection mechanism 3 is activated, when the gas control valve... When the control valve receives a signal indicating that the foreign object detection result is a defective product, it activates the air blowing assembly 31 and simultaneously controls the movable baffle 5 to open the slide 4 corresponding to the defective foreign object. When the gas control valve receives a signal indicating that the weighing detection result is a defective product, it activates the air blowing assembly 31 and simultaneously controls the movable baffle 5 to open the slide 4 corresponding to the weighed defective product. The gas control valve determines the airflow time of the air blowing assembly 31 in the same way as in Embodiment 1, which is to calculate the time point of arrival at the rejection position by combining the signal emission time, the distance between the detection mechanism and the rejection mechanism 3, and the conveying speed.

[0049] The advantage of this example is that only one rejection mechanism 3 needs to be set up, which further shortens the length of the sorting conveyor belt 103 and makes full use of the idle space under the conveyor belt for classified collection. At the same time, by setting up the diversion conveyor belt 104, the load on the weighing and detection mechanism 2 is reduced, thereby improving the space utilization rate of the production site and the overall detection efficiency.

[0050] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A detection device for compressed biscuits, comprising a feeding conveyor belt, a detection conveyor belt, and a sorting conveyor belt arranged sequentially; Its features are: The inspection conveyor belt is equipped with a foreign object detection mechanism and a weighing detection mechanism sequentially along the conveying direction, used for foreign object detection and weight detection, respectively. The sorting conveyor belt is equipped with a rejection mechanism, used to sequentially reject defective products with foreign objects and products with weight defects. The rejection mechanism includes an air blowing assembly, a collection box, and a mounting base located on both sides of the sorting conveyor belt. The air blowing assembly includes an air blowing head, a connecting pipe, and an air inlet pipe. The air blowing head has a flat nozzle at its end, positioned close to the surface of the sorting conveyor belt. The air blowing head is connected to an external air source sequentially through the connecting pipe and the air inlet pipe. The connecting pipe is located on the mounting base and contains a gas control valve. The gas control valve is signal-connected to the foreign object detection mechanism and the weighing detection mechanism to control the airflow. The mounting base is fixed to the side of the sorting conveyor belt, and at least one collection box is provided for collecting defective products.

2. The device for detecting compressed biscuits according to claim 1, characterized in that: The bottom surface of the collection box is lower than the upper surface of the sorting conveyor belt. The collection box is equipped with a splash-proof protective cover. The opening of the protective cover faces the sorting conveyor belt and is opposite to the air blowing component.

3. The device for detecting compressed biscuits according to claim 1, characterized in that: The rejection mechanism is provided in two sets, and each set of rejection mechanism is provided with a collection box. The rejection mechanism corresponds one-to-one with the foreign object detection mechanism and the weighing detection mechanism. Along the conveying direction, the rejection mechanism at the front is used to reject foreign object defective products, and the rejection mechanism at the rear is used to reject weighing defective products.

4. The device for detecting compressed biscuits according to claim 1, characterized in that: The rejection mechanism is set as a set, the bottom surface of the collection box is a downward slope, the end of the slope is provided with two independent slides, the connection between the end of the slope and the slide is provided with a movable baffle, the movable baffle is used to control defective products to enter the corresponding slide, and the end of the slide is provided with a classification collection box, the classification collection box is used to collect defective products of the corresponding type.

5. The device for detecting compressed biscuits according to claim 4, characterized in that... The movable baffle has two corresponding slides. The ends of the movable baffles are abutted against each other and arranged in a V-shape. When opened, the movable baffles open into the corresponding slides.

6. The device for detecting compressed biscuits according to claim 4, characterized in that... The fixed end of the movable baffle is located at the boundary of the slide, and the movable end of the movable baffle can swing left and right to open or close one of the slides accordingly.

7. The device for detecting compressed biscuits according to claim 1, characterized in that: The air nozzle is arc-shaped, and a narrow strip is provided on the lower part of the air nozzle close to the sorting conveyor belt. The upper part of the air nozzle is provided with evenly distributed air outlet holes.

8. The device for detecting compressed biscuits according to claim 1, characterized in that: The mounting base includes a fixed block, an adjusting rod, and a support block. The fixed block is fixedly connected to the sorting conveyor belt. The adjusting rod is mounted on the fixed block and can be adjusted up and down relative to the fixed block. The support block is mounted on the adjusting rod and can be rotated relative to the adjusting rod. The connecting pipe is fixedly mounted on the support block.

9. The device for detecting compressed biscuits according to claim 1, characterized in that: The detection conveyor belt has two parallel diversion conveyor belts with the same speed at the location of the weighing detection mechanism. The weighing detection mechanism is set on one of the diversion conveyor belts for weighing compressed biscuits that do not contain foreign objects. The front end of the diversion conveyor belt is provided with a movable lever, which is used to guide the compressed biscuits to the corresponding diversion conveyor belts according to the foreign object detection results. The rear ends of the diversion conveyor belts are connected to the sorting conveyor belt.

10. The device for detecting compressed biscuits according to claim 9, characterized in that: The sorting conveyor belt has a guide structure at its front end, which is used to guide the compressed biscuits conveyed by the diversion conveyor belt to the center position of the sorting conveyor belt.

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