Air blow-off device and conveying rejection system

Abstract

The application provides a blowing removing device and a conveying removing system. The blowing removing device comprises a main body, a plurality of blowing devices and a flow guide cover. The main body is suspended above a conveying belt of a conveying device by at least one support, and is used for dividing a conveying channel of the conveying belt into two sub-channels. A pair of blowing devices are respectively arranged on two sides of the main body, and provide air flows to the two sub-channels without interference. The flow guide cover is arranged on the upper side of the blowing devices, and comprises an opening which serves as a separation outlet for articles to leave the conveying belt. The blowing removing device has a better blowing removing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of detection devices, specifically to the field of air-blowing rejection devices. Background Technology

[0002] When defective items are detected in the production line, a corresponding rejector is needed to remove the defective items, ensuring that defective items do not flow to the next process.

[0003] Typically, a single conveyor channel has one air-blowing rejector, which can only reject items in one direction. In dual-channel or multi-channel conveyor systems, the air-blowing rejector on one channel can easily interfere with items in other channels while performing its rejection action, and other channels can also affect the rejection task of that channel.

[0004] Therefore, it is necessary to set up an air-blowing rejection device suitable for dual channels to solve the above problems and achieve efficient rejection. Utility Model Content

[0005] One objective of this invention is to provide an air-blowing rejection device.

[0006] To achieve the above objectives, an air-blowing rejection device is mounted on a transmission device, comprising a main body, multiple air-blowing devices, and a flow guide. The main body is suspended above the conveyor belt of the transmission device by at least one bracket, which divides the conveyor belt's transport channel into two sub-channels. A pair of air-blowing devices are located on both sides of the main body, providing non-interfering airflow to the two sub-channels. The flow guide is mounted on the upper side of the air-blowing devices, and the flow guide includes an opening that serves as an exit outlet for items leaving the conveyor belt.

[0007] In one or more embodiments, the transmission direction of the conveyor belt is a first direction, the main body includes a distance adjustment structure located upstream of the blowing device in the first direction, the distance adjustment structure includes a guide and a connecting rod connected to the guide, the guide being used to push away the item on the conveyor belt so that the item forms a distance from the main body.

[0008] In one or more embodiments, the guide member has an inclined portion at its front end in a first direction, the inclined portion being positioned closer to the main body member upstream than downstream in the first direction.

[0009] In one or more embodiments, the distance adjustment structure is detachably connected to the main body.

[0010] In one or more embodiments, the connecting rod is configured to have a variable length to adjust the distance between the guide and the main body.

[0011] In one or more embodiments, the blowing device includes an air chamber, an air inlet, and an air nozzle that are in communication with each other, the air inlet being used to input airflow and the air nozzle being used to provide a purging airflow.

[0012] In one or more embodiments, the nozzle opening is angled downwards to allow the purging airflow to reach the surface of the conveyor belt.

[0013] In one or more embodiments, the acute angle formed between the blowing direction of the purging airflow and the vertical direction of the conveyor belt is in the range of 35 to 50°.

[0014] In one or more embodiments, the air blowing device includes a plurality of air nozzles that are arranged at equal intervals in the transmission direction of the conveyor belt.

[0015] In one or more embodiments, the blowing device includes a fixing part with a connecting hole for engaging with a connector to allow the blowing device to be detachably connected to the main body.

[0016] In one or more embodiments, the support includes a longitudinal support, a transverse support, and a connecting rod. The longitudinal support is disposed on the transmission device, the transverse support spans both ends of the conveyor belt and is connected to the longitudinal support, and the main body is connected to the transverse support through the connecting rod.

[0017] In one or more embodiments, the distance between the main body and the surface of the conveyor belt is 0.5 to 2 cm.

[0018] In one or more embodiments, the distance between the main body and the conveyor belt surface is configured to be adjustable.

[0019] In one or more embodiments, the flow guide and the conveyor belt define a rejection channel that expands in a horizontal direction perpendicular to the conveyor belt's transmission direction in a direction away from the main body.

[0020] Another objective of this invention is to provide a conveyor rejection system, comprising a conveyor belt, the aforementioned air-blowing rejection device, and a detection device, wherein the air-blowing rejection device is located above the conveyor belt, and the detection device is located upstream of the air-blowing rejection device.

[0021] The aforementioned air-blowing rejection device can be directly installed on the output conveyor belt table, dividing the conveying area into two sub-areas. Multiple air-blowing devices are used to provide non-interfering airflow to each sub-channel, thereby directly splitting the airflow into a pair of air-blowing rejection channels. This effectively improves the air-blowing rejection efficiency, significantly reduces the cost of the output rejection scheme, and saves production line space. Attached Figure Description

[0022] The above and other features, properties and advantages of this utility model will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a schematic diagram of one embodiment of an air-blowing rejection device located on a conveyor belt;

[0024] Figure 2 This is a schematic diagram of one embodiment of the main body and the air blowing device;

[0025] Figure 3 This is a schematic diagram of one embodiment of the air nozzle hole;

[0026] Figure 4 This is a schematic diagram of one embodiment of the fairing;

[0027] Figure 5 This is a schematic diagram of one embodiment of the delivery rejection system;

[0028] Figure 6 This is a front view of one embodiment of the delivery rejection system. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0030] It should be noted that these and other accompanying drawings are merely examples and are not drawn to scale, and should not be used as a limitation on the scope of protection of this utility model.

[0031] In enterprise production, it is necessary to ensure that the items on the production line meet quality standards and that there are no quality problems such as foreign objects, missing particles, or improper packaging sealing. For example, in the food and snack industry, vacuum-packed foods must not have foreign objects or problems with sealing, or in the pharmaceutical industry, aluminum-plastic blister packs must not have foreign objects or missing particles.

[0032] Generally, defective items are first detected using X-ray detectors, metal detection systems, and automatic checkweighers. Then, appropriate rejectors are used to remove these defective items, ensuring they do not proceed to the next stage. Rejectors mainly include push-rod rejectors, pull-down rejectors, and air-blowing rejectors.

[0033] In the pharmaceutical, food, and snack food industries, the products are typically thin and lightweight, and the throughput is very high, generally reaching 200 to 300 pieces per minute. Push rod rejectors are unsuitable because they can cause jamming when rejecting thin and lightweight items, and pull-down rejectors are also unsuitable for this application scenario because their rejection speed cannot meet such a high throughput. Therefore, air-blowing rejectors are currently the most commonly used technology.

[0034] Air-blowing rejectors use a strong airflow to agitate defective items off the conveyor belt. Currently, to improve conveying and inspection efficiency, many production lines employ dual-channel or multi-channel processes, such as using X-ray detectors for dual-channel inspection. However, due to factors such as airflow direction and interference from the defective item's escape path, dual-channel or multi-channel air-blowing rejectors are prone to interference, affecting the rejection effect. For example, in a dual-channel conveyor setup, when a single-channel air-blowing rejector is performing the first channel rejection action, items in the second channel will interfere with it, making it impossible to perform rejection tasks in both channels simultaneously.

[0035] Therefore, the commonly used single-channel air-blowing rejector cannot be directly applied in dual-channel detection mode. To improve air-blowing rejection efficiency and adapt to the characteristics of the current production line channels, it is usually necessary to lay out a diversion output production line after the detection device, and then arrange a separate air-blowing rejector on each output production line. This output rejection scheme will greatly increase equipment investment costs and require more production line space.

[0036] Based on this, the present disclosure provides an air-blowing rejection device that can construct a dual-channel air-blowing rejection flow path on an existing production line, effectively improving the air-blowing rejection efficiency.

[0037] Figure 1 A transmission device 10 is shown, which includes a conveyor belt 11. Figure 1 The transmission direction of the conveyor belt 11 is the first direction Y, and the items 40 on the conveyor belt move along the first direction Y. Upstream of the first direction Y, that is, on the -Y side of the conveyor belt 11, there are detection devices such as X-ray detectors, metal detection systems, automatic checkweighing systems, and industrial cameras (not shown in the figure) for detecting unqualified items.

[0038] The air-blowing rejection device 20 is located on the transmission device 10 and downstream of the detection device in the first direction Y, and includes a main body 21, multiple air-blowing devices 22 and a flow guide 23.

[0039] The main body 21 is suspended above the conveyor belt 11 by at least one bracket 25, dividing the conveyor belt 11 into two sub-channels 110. Specifically, the bracket 25 includes a longitudinal bracket 251, a transverse bracket 252, and a connecting rod 253. The longitudinal bracket 251 is arranged along the third direction Z and fixed to the side of the transmission device 10. The transverse bracket 252 spans the conveyor belt 11 along the second direction X, and its two ends are respectively connected to the longitudinal bracket 251. The main body 21 is connected to the transverse bracket 252 by the connecting rod 253 extending along the third direction Z.

[0040] In some embodiments, the distance between the main body 21 and the conveyor belt 11 is in the range of 0.5 to 2 cm, so as not to interfere with the normal operation of the conveyor belt 11.

[0041] To accommodate different conveying structures, the distance between the main body 21 and the surface of the conveyor belt 11 is adjustable. For example, a waist-shaped hole 254 extending in the third direction Z is provided on the longitudinal support 251, and the height of the main body 21 can be changed by adjusting the position of the longitudinal support 251 relative to the conveyor belt 11; or the distance can be adjusted by adjusting the relative position of the main body 21 on the connecting rod 253, thereby matching the thickness of different items 40 on the conveyor belt, so that the rejection device has better adaptability.

[0042] A pair of air blowing devices 22 are respectively installed at different positions on the main body 21 to provide airflow to the two sub-channels 110 without interfering with each other, so that the items 40 located on each sub-channel leave the conveyor belt.

[0043] like Figures 1 to 3 As shown, a pair of air blowing devices 22 are respectively disposed on both sides of the main body 21. Each air blowing device 22 includes an air chamber 220, an air inlet 221, and an air nozzle 222 that are interconnected. The air inlet 221 is used to input airflow, the air chamber 220 is used to contain gas, and the end of the air chamber 220 is sealed with an air nozzle plug 225. The air nozzle 222 is used to provide a rejection airflow, and the activation of the air nozzle 222 is controlled by a solenoid valve 227. Figure 1 The solenoid valve 227 is mounted on the outside of the flow guide 23 via a bracket 25, and is connected to the air inlet 221 via an air pipe passing through the flow guide 23. When the solenoid valve 227 is activated, gas is ejected from the corresponding sub-channel nozzle 222. The strong airflow causes defective items to leave the conveyor belt through the opening 230 on the flow guide 23, thereby being rejected.

[0044] The air blowing device also includes a fixing part 223, which has a connecting hole 224 for engaging with a connecting component such as a bolt, so that the air blowing device 22 can be detachably connected to the main body 21.

[0045] like Figure 2As shown, in some embodiments, the air blowing device includes a plurality of air nozzles 222, which communicate with the air chamber 220. The plurality of air nozzles 222 are arranged at equal intervals in the conveying direction of the conveyor belt, and further, the plurality of air nozzles 222 are arranged at the same height, so that the rejection airflow from the plurality of air nozzles 222 together forms an airflow pushing surface.

[0046] The diameter of the nozzle orifice 222 is within the range of 2mm to 5mm, and can be adjusted adaptively according to the required airflow intensity.

[0047] Since the air blowing devices 22 are respectively set on both sides of the main body 21 in the second direction X, and the two exhaust nozzles 222 are symmetrically arranged, the air blowing directions of the nozzles do not interfere with each other, thereby efficiently removing the items 40 located on the two sub-channels 110.

[0048] Above the air blowing device 22, a flow guide 23 is also provided. The flow guide 23 is mounted above the conveyor belt platform and covers the air blowing area of ​​the nozzle holes on the two sub-channels. The flow guide 23 and the conveyor belt 11 define a rejection channel. (See reference...) Figure 1 , Figure 4 It is understood that the overall structure of the deflector 23 is symmetrical with the main body 21 as the center. The top is flat, and it includes a first conveying port 232 and a second conveying port 233 on both sides in the first direction Y. It also includes openings 230 on both sides in the second direction X. The deflector 23 is also provided with a through hole 231 through which the air supply pipe passes.

[0049] Both the first conveyor 232 and the second conveyor 233 include a clearance opening 234 and a movable opening 235. The clearance opening 234 provides space to accommodate the main body 21 and the blowing device 22, while the movable opening 235 allows items 40 on the conveyor belt to flow into and out of the rejection channel.

[0050] The items 40 on the conveyor belt move along the first direction Y from the first conveyor port 232 into the guide shroud 23. Qualified items are conveyed out from the second conveyor port 233, while unqualified items are affected by the rejection airflow ejected from the nozzle hole 222 and fly out of the rejection channel through the opening 230. That is, the opening 230, as the exit of the rejection channel, can constrain the flying path F of the items.

[0051] The width of the opening 230 in the first direction Y is greater than the area on the guide shroud located above the main body 21, so that the rejection channel expands in the horizontal direction perpendicular to the conveyor belt drive direction away from the main body, that is, it expands in the X direction. Overall, the rejection channel presents an outward trumpet shape to cover the rejection path of the product as much as possible.

[0052] The function of the flow guide 23 is also to constrain the rejection airflow blown out of the air nozzle 222, so that the rejection airflow is concentrated on the rejection path, reducing the product adsorption problem caused by the Bernoulli effect.

[0053] The Bernoulli effect refers to the phenomenon that the pressure is lower where the flow velocity is higher and higher where the flow velocity is lower. For some items, such as thin or light items, the Bernoulli effect can cause them to adhere to the conveyor surface during air removal, making it difficult to remove them accurately.

[0054] When an item is close to the air nozzle 222, the airflow near the air nozzle 222 is very concentrated, and most of it is concentrated in the gap between the item and the conveyor belt table. The airflow velocity in the gap increases and the pressure decreases, while the airflow pressure change above the item is not so obvious. As a result, the item is easily attracted to the conveyor belt 11 table during the air blowing rejection process, which leads to the phenomenon of missed rejection, especially for thin items, affecting the rejection effect.

[0055] For this reason, the deflector 23 serves to constrain the rejection airflow, concentrating the airflow within the rejection path of the hood cavity, reducing the problem of item adsorption caused by the Bernoulli effect; it also ensures that non-conforming items can fly to the rejection port on the designated constrained path, so that non-conforming items are sent to collection devices such as non-conforming item collection boxes, preventing items from being blown away and unable to be collected.

[0056] To further avoid the adverse effects of the Bernoulli effect, the device is equipped with a distance adjustment structure 24 upstream of the blowing device 22 along the first direction Y, such as... Figure 1 and Figure 2 As shown. The distance adjustment structure 24 is located on the main body component 21 and includes a guide member 240 and a connecting rod 241 connecting the guide member 240 and the main body component 21. The connecting rod 241 is configured to have a variable length to adjust the distance between the guide member 240 and the main body component 21. The guide member 240 is used to push away the item 40 on the conveyor belt 11 so that the item 40 forms a distance with the main body component 21, and then forms a distance G with the air blowing device 22 or the air nozzle hole 222, as shown. Figure 1 As shown.

[0057] When an item moves to the vicinity of the air nozzle 222, the distance G allows the airflow to disperse, increasing the airflow surface area and making the thrust more uniform. This results in the flow velocity below and above the item being approximately equal, as well as the pressure above and below, ensuring that the airflow thrust can effectively remove the item. Therefore, this distance G makes it less likely for an item to be sucked in by the Bernoulli effect when it moves to the vicinity of the air nozzle 222 of the blowing device 22, thus effectively improving the success rate of removal.

[0058] It is understandable that different items have different shapes, structures, and weight parameters, and the corresponding distance G parameter will also vary. In this case, the length of the connecting rod 241 can be adjusted to make it suitable.

[0059] The connecting rod 241 can be a multi-layer sleeve structure to achieve its own length extension or retraction; it can also be a threaded structure to adjust the extension distance through the thread. Those skilled in the art will understand that the connecting rod includes, but is not limited to, the above-mentioned structures, and any rod-shaped structure that can achieve its own length adjustment is applicable to this application.

[0060] Furthermore, the guide member 24 has an inclined portion 242 at its front end in the first direction. The inclined portion 242 is positioned closer to the main body member 21 upstream of the guide member 24 in the first direction Y than downstream, to improve the diversion and guidance effect on items entering the conveyor belt. Figure 2 As shown.

[0061] The distance adjustment structure 24 is detachably connected to the main body 21. For example, the connecting rod 241 is connected to the main body 21 by a screw or other connector. When the conveyor belt 11 changes its transmission direction, the distance adjustment structure located at one end of the main body 21 can be detached and moved to the other end of the main body 21 to accommodate various transmission directions.

[0062] Furthermore, to suppress the Bernoulli effect on the rejection effect, the opening of the air nozzle 222 is angled downwards, such as... Figure 3 As shown, the airflow direction D forms an acute angle α with the third direction Z perpendicular to the conveyor belt 11. This design ensures that the airflow from the nozzle hole 222 can be concentrated and pressed down towards the side of the item, so that the item can be blown up first, increasing the gap between the item and the conveyor belt 11, thereby avoiding the problem of item adsorption caused by Bernoulli effect.

[0063] In one specific embodiment, the acute angle α ranges from 35 to 50°, such as 45°.

[0064] The center O of the air nozzle hole 222 is approximately 2 to 4 mm away from the bottom surface of the air nozzle, i.e., the height H from the bottom of the air blowing device, to prevent items from being sucked up.

[0065] Thus, the two rows of items transmitted from the aforementioned detection device are first guided and separated by the distance adjustment structure 24, ensuring a certain distance G between the items 40 and the air nozzle 222. When a defective item passes the position of the air nozzle 222, the solenoid valve 227 is activated, causing the air nozzle 222 of the corresponding sub-channel to spray gas at a specific angle. The strong airflow removes the defective item from the rejection opening 230, while the guide shroud 23 effectively constrains the rejection airflow, giving the aforementioned air-blowing rejection device a better rejection success rate.

[0066] The aforementioned air-blowing rejection device, through its downward-spraying rejection air nozzle structure, distance adjustment structure, and guide shroud, effectively solves the problem of items being difficult to reject due to the Bernoulli effect, avoiding omissions, ensuring accurate rejection, and achieving closed-loop control of item quality. Furthermore, by directly installing the air-blowing rejection device on the output conveyor belt table, the conveying area is divided into two sub-areas, and multiple air-blowing devices provide non-interfering airflow to each sub-channel, thereby directly splitting the airflow into two air-blowing rejection channels. This effectively improves air-blowing rejection efficiency, significantly reduces the cost of the output rejection scheme, and saves production line space.

[0067] Based on the description of the air-blowing rejection device, a conveying rejection system can also be understood, such as... Figure 5 and Figure 6 As shown, the conveyor rejection system includes a conveyor belt 11, an air-blowing rejection device 20, and a detection device 30. The air-blowing rejection device 20 is located above the conveyor belt 11, and the detection device 30 is located upstream of the air-blowing rejection device in the first direction Y.

[0068] The detection device 30 includes, but is not limited to, an X-ray detector, a metal detection system, and an automatic checkweigher system.

[0069] The conveyor rejection system also includes a frame 1, an electrical control box 2, an air tank 8, and a pneumatic assembly 9. The frame 1 serves as the overall support structure, and the conveyor belt 11 and the air-blowing rejection device 20 are all mounted on the frame 1. The control units for controlling the air-blowing rejection device and the conveyor belt are installed in the electrical control box 2, which is mounted on the square tube of the frame 1 via an L-shaped mounting plate. The pneumatic assembly 9 is mounted on the side columns of the frame 1, and the matching air tank 8 is mounted on the square tube of the frame 1.

[0070] The items are transported from -Y to +Y. After being detected by a detection device 30, such as an X-ray detector, they flow through the air-blowing rejection device 20. The items are diverted by the distance adjustment structure 24 and transported to two sub-channels 110 respectively. They are pushed aside by the guide member 240 and transported to the air nozzle hole 222 at a distance G.

[0071] If the items on the channel pass the X-ray detector inspection, they will pass smoothly through the conveyor and continue to be transported to the downstream equipment along the +Y direction. If any sub-channel 110 has a defective item detected, when the defective item passes through the air nozzle 222 on the sub-channel, the solenoid valve 227 will perform an air blowing action. The airflow will blow out through the air nozzle 222 and fly the defective item out of the rejection outlet 230 on the guide shroud 23.

[0072] This conveyor rejection system has excellent rejection efficiency and can effectively save production line space and costs.

[0073] It should be noted that the use of terms such as "first" and "second" to define the components in the above content is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0074] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0075] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible variations and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. An air-blowing removal device, mounted on a transmission device, characterized in that, include: The main body is suspended above the conveyor belt of the transmission device by at least one bracket, which is used to divide the conveyor belt's transport channel into two sub-channels; A pair of air blowing devices are located on both sides of the main body, respectively, for providing non-interfering airflow to the two sub-channels; as well as A flow deflector is disposed on the upper side of the blowing device, the flow deflector including an opening that serves as a discharge outlet for items leaving the conveyor belt.

2. The air-blowing rejection device as described in claim 1, characterized in that, The conveyor belt's transmission direction is a first direction, and the main body includes a distance adjustment structure located upstream of the air blowing device in the first direction. The distance adjustment structure includes a guide and a connecting rod connected to the guide. The guide is used to push away the items on the conveyor belt so that the items form a distance from the main body.

3. The air-blowing rejection device as described in claim 2, characterized in that, The guide member has an inclined portion at its front end in the first direction, and the inclined portion is positioned closer to the main body member upstream than downstream in the first direction.

4. The air-blowing rejection device as described in claim 2, characterized in that, The distance adjustment structure is detachably connected to the main body.

5. The air-blowing rejection device as described in claim 2, characterized in that, The connecting rod is configured to have a variable length to adjust the distance between the guide and the main body.

6. The air-blowing rejection device as described in claim 1, characterized in that, The blowing device includes an air chamber, an air inlet, and an air nozzle that are connected to each other. The air inlet is used to input airflow, and the air nozzle is used to provide a purging airflow.

7. The air-blowing rejection device as described in claim 6, characterized in that, The nozzle opening is angled downwards so that the purging airflow is blown onto the surface of the conveyor belt.

8. The air-blowing rejection device as described in claim 7, characterized in that, The acute angle formed between the blowing direction of the purging airflow and the perpendicular direction of the conveyor belt is in the range of 35 to 50°.

9. The air-blowing rejection device as described in claim 6, characterized in that, The air blowing device includes multiple air nozzles, which are arranged at equal intervals in the transmission direction of the conveyor belt.

10. The air-blowing rejection device as described in claim 6, characterized in that, The air blowing device includes a fixing part with a connecting hole for engaging with a connector to allow the air blowing device to be detachably connected to the main body.

11. The air-blowing rejection device as claimed in claim 1, characterized in that, The support includes a longitudinal support, a transverse support, and a connecting rod. The longitudinal support is mounted on the transmission device. The transverse support spans both ends of the conveyor belt and is connected to the longitudinal support. The main body is connected to the transverse support via the connecting rod.

12. The air-blowing rejection device as described in claim 11, characterized in that, The distance between the main body and the surface of the conveyor belt is in the range of 0.5 to 2 cm.

13. The air-blowing rejection device as described in claim 11, characterized in that, The distance between the main body and the surface of the conveyor belt is adjustable.

14. The air-blowing rejection device as described in claim 1, characterized in that, The flow guide and the conveyor belt define a rejection channel, which expands in a horizontal direction perpendicular to the transmission direction of the conveyor belt, away from the main body.

15. A conveying rejection system, characterized in that, include: Conveyor belt; The air-blowing rejection device as described in any one of claims 1-14 is located above the conveyor belt; as well as The detection device is located upstream of the air-blowing removal device.

Images