A metal can air feeding device with a rejection function and an automatic rejection method

Abstract

A metal can air feeding device with a rejection function is arranged between a front conveying mechanism and a rear conveying mechanism, and comprises an air feeding body; the air feeding body comprises a rejection mechanism and a conventional air feeding mechanism arranged along the conveying direction of the metal can; the rejection mechanism comprises a mounting frame fixed with the front conveying mechanism; the mounting frame is arranged with a plurality of rotating rejection units along a direction perpendicular to the conveying direction of the metal can; each rotating rejection unit is connected with a rejection action controller; the rejection action controller can drive the rotating rejection unit to rotate downward from a horizontal state; the upper surface of the rotating rejection unit and the upper side of the conventional air feeding mechanism are both provided with air feeding inclined holes; a shielding mechanism is arranged above the air feeding body, and the metal can can pass through between the air feeding body and the shielding mechanism. On the basis of the original air feeding mechanism, the rejection mechanism is added, and the metal can can be rejected without stopping.

Description

Technical Field

[0001] This invention relates to the field of pneumatic conveying devices for metal cans, specifically to a pneumatic conveying device for metal cans with a rejection function and an automatic rejection method. Background Technology

[0002] As shown in the metal can pneumatic conveying mechanism disclosed in CN221396097U, unlike the conventional conveyor belt method, the pneumatic conveying mechanism can arrange metal cans closely and make the metal cans move continuously during the process. In order to prevent the metal cans from being blown over by the pneumatic conveying method, a shielding mechanism is required. Therefore, when deformed metal cans enter the pneumatic conveying mechanism, they cannot be removed manually. Furthermore, deformed metal cans are easily stuck in the arrangement mechanism, affecting the normal operation of the packaging line. Under normal circumstances, the shielding mechanism needs to be moved to remove the deformed metal cans, and the operation of the pneumatic conveying mechanism needs to be interrupted, thus affecting the packaging efficiency. Summary of the Invention

[0003] To address the aforementioned problems, the present invention provides a metal can pneumatic conveying device with a rejection function.

[0004] The technical solution of this invention is as follows:

[0005] A metal can pneumatic conveying device with rejection function is disposed between a front conveying mechanism and a rear conveying mechanism, and includes a pneumatic conveying body on the same horizontal plane as the front conveying mechanism and the rear conveying mechanism.

[0006] The pneumatic conveying body includes a rejection mechanism and a conventional pneumatic conveying mechanism arranged along the metal can conveying direction. The rejection mechanism includes a mounting frame fixed to the front conveying mechanism. The mounting frame has multiple rotating rejection units arranged in a direction perpendicular to the metal can conveying direction. Each rotating rejection unit is connected to a rejection action controller. The rejection action controller can drive the rotating rejection unit to rotate downward from a horizontal state. Both the upper surface of the rotating rejection unit and the upper part of the conventional pneumatic conveying mechanism are provided with pneumatic conveying inclined holes. The opening direction of the pneumatic conveying inclined holes is the same as the metal can conveying direction and is inclined upward.

[0007] A shielding mechanism is provided above the air conveyor body, allowing the metal can to pass through the space between the air conveyor body and the shielding mechanism, and the height between the air conveyor body and the shielding mechanism is such that the metal can cannot be tipped over.

[0008] Based on the existing pneumatic conveying mechanism, a rejection mechanism is added, which can remove metal cans from the packaging line without stopping the machine, and will not affect other normal metal cans during the rejection process.

[0009] The specific structure of the aforementioned rotating rejection unit is as follows: the rotating rejection unit includes a rotating seat that is detachably connected to the mounting frame; an air conveying support bar is rotatably connected to the end of the rotating seat; the rotating plane of the air conveying support bar is parallel to the metal can conveying direction; and air conveying oblique holes are arranged above the air conveying support bar.

[0010] To avoid affecting other metal cans when removing deformed metal cans, a single metal can passing through the removal mechanism must be supported by at least four adjacent pneumatic support bars within the same time period, and the same metal can cannot cross six adjacent pneumatic support bars.

[0011] The specific structure of the above-mentioned rejection action controller is as follows: the rejection action controller includes an air supply pipe connected to the air delivery support bar. One end of the air supply pipe is connected to the air delivery inclined hole, and the other end is provided with an air supply port and connected to an external air source structure. The end of the air supply pipe away from the air delivery support bar is also connected to the end of the telescopic unit and is moved by the telescopic unit.

[0012] The method to achieve the rotation switching state of the air delivery support bar is as follows: a torsion spring is set between the air delivery support bar and the rotating seat, and the end of the air delivery support bar away from the rotating seat is an inclined surface that abuts against the conventional air delivery mechanism. The air delivery support bar can abut against the conventional air delivery mechanism under the action of the torsion spring, and can be pulled to rotate by the air delivery pipe after being driven by the telescopic unit.

[0013] As a preferred embodiment, the length of the pneumatic support bar is less than 3 / 2 of the diameter of the metal tank.

[0014] To ensure proper removal of deformed metal cans, the four adjacent pneumatic support bars are simultaneously rotated downwards to their limit positions, creating a gap through which the metal cans can pass vertically.

[0015] To prevent metal cans from becoming stuck on the packing line, each metal can passing through the rejection mechanism is moved by at least two adjacent air conveying orifices in the metal can conveying direction within the same time period.

[0016] To facilitate identification of the metal can spanning several pneumatic support bars, a reflective coating is provided on the upper surface of the pneumatic support bars, and the reflective coatings of adjacent pneumatic support bars are of different colors.

[0017] An automatic rejection method for a metal can pneumatic conveying device with rejection function further includes a main control terminal. The output of the main control terminal is connected to each telescopic unit, and the input is connected to a visual recognition camera. The visual recognition camera is positioned above the rejection mechanism, and a transparent shielding plate is installed between the rejection mechanism and the visual camera. After the visual recognition camera detects a deformed metal can, the main control terminal drives the corresponding telescopic unit to rotate the pneumatic conveying support bar downwards. This eliminates the need for manual identification and control; instead, monitoring and feedback are provided through the visual recognition camera, and the corresponding telescopic unit is then controlled by the active terminal.

[0018] The beneficial effects of the present invention are as follows: The present invention is a metal can pneumatic conveying device with rejection function. Based on the existing structure, by adding a rejection mechanism, deformed metal cans can be rejected. During the rejection process, it will not affect the movement of other normal metal cans. Furthermore, the rejection mechanism can cooperate with the main control terminal and visual recognition camera to replace human labor in completing the identification and rejection operation, thereby realizing the automation of the above actions. Attached Figure Description

[0019] The solutions and advantages of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention.

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the structure of the present invention placed behind the metal can packaging line;

[0022] Figure 2 This is a schematic diagram of the main structure of the pneumatic conveyor of the present invention;

[0023] Figure 3 This is a schematic diagram of the metal can rejection state structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the main structure of the pneumatic conveyor of the present invention (and...). Figure 2 (Different states);

[0025] Figure 5 This is a schematic diagram of the rejection mechanism of the present invention;

[0026] Figure 6 This is a schematic diagram of the rejection mechanism structure of the present invention (and...). Figure 5 (Different states);

[0027] Figure 7 This is a schematic diagram of the shielding mechanism of the present invention;

[0028] The components represented by the various reference numerals in the diagram are:

[0029] 1. Front conveying mechanism; 2. Pneumatic conveying body; 21. Rejection mechanism; 211. Mounting frame; 212. Rotating rejection unit; 2121. Rotating seat; 2122. Pneumatic conveying support bar; 2123. Pneumatic conveying inclined hole; 213. Rejection action controller; 2131. Telescopic unit; 2132. Air supply duct; 2133. Air supply outlet; 22. Conventional pneumatic conveying mechanism; 3. Shielding mechanism; 31. Moving frame; 32. Transparent shielding plate; 4. Arrangement mechanism; 5. Rear conveying mechanism; 6. Metal tank. Detailed Implementation

[0030] like Figure 2 The illustrated metal can pneumatic conveying device with rejection function is arranged between the front conveying mechanism 1 and the rear conveying mechanism 5, and the structure of the metal can 6 packing line is as follows: Figure 1 As shown, after screening, the cans can be arranged by the sorting and arranging mechanism 4. In the patent previously applied for by our company, the sorting and arranging mechanism 4 is equipped with a metal can screening structure, but it is only suitable for screening metal cans with large deformation. Some metal cans are unable to enter the sorting and arranging mechanism 4 due to deformation, which causes problems in use. It can be used normally when the overall production pass rate of metal cans 6 is high, but it has a greater impact when the yield of metal cans 6 is low. For this reason, the shielding mechanism 3 is set to be a movable structure to facilitate the removal of metal cans 6 stuck in the sorting and arranging structure 4. However, this structure is different. Unlike the previous method, this device removes metal cans 6 in the pneumatic conveying section. Therefore, this device includes a pneumatic conveying body 2 on the same horizontal plane as the front conveying mechanism 1 and the rear conveying mechanism 5.

[0031] Similar to the existing air conveying mechanism 2, it can propel the metal can 6 forward by blowing air. The air conveying body 2 includes a rejection mechanism 21 and a conventional air conveying mechanism 22 arranged along the conveying direction of the metal can 6. The conventional air conveying mechanism 22 does not need to be described in detail in our previous application documents. The key point is that the rejection mechanism 21 includes a mounting frame 211 fixed to the front conveying mechanism 1. The mounting frame 211 has multiple rotating rejection units 212 arranged in a direction perpendicular to the conveying direction of the metal can 6. The purpose of setting multiple rotating rejection units 212 is to reject individual metal cans 6 as needed, and during the rejection process, it should not affect the normal air conveying of other normal metal cans 6. For this purpose, each rotating rejection unit 212 is connected to a rejection action controller 213, and each rejection action controller 213 can drive the rotating rejection unit 212 to rotate downward from a horizontal state. Under normal conditions, the rotating rejection unit 212 is in a horizontal state, thus enabling normal air conveying. After rotation, as... Figure 5-6As shown, this creates a passageway, allowing the metal can 6 to lose its pneumatic drive and fall freely into the cavity below. Therefore, a collection mechanism can be installed below the rotating rejection unit 212 (details omitted). It's important to note that to ensure proper pneumatic conveying, both the upper surface of the rotating rejection unit 212 and the upper surface of the conventional pneumatic conveying mechanism 22 are equipped with pneumatic conveying oblique holes 2123. The opening direction of these oblique holes 2123 is the same as the conveying direction of the metal can 6, and they are angled upwards. After ventilation, these oblique holes 2123 will push the metal can 6 forward and upward. Therefore, a blocking mechanism 3 is installed above the pneumatic conveying body 2. The metal can 6 can pass between the pneumatic conveying body 2 and the blocking mechanism 3, and the height between them is insufficient to allow the metal can 6 to tip over. Because it cannot tip over, the metal can 6 can bounce forward under the action of the pneumatic conveying oblique holes 2123, ensuring proper connection between the front conveying mechanism 1 and the rear conveying mechanism 5.

[0032] like Figure 3-6As shown, the specific structure of the aforementioned rotating rejection unit 212 is as follows: the rotating rejection unit 212 includes a rotating seat 2121 detachably connected to the mounting bracket 211. The reason for adopting this method is that if a single rotating rejection unit 212 malfunctions, it can be replaced individually without affecting normal use. It only requires disassembling and assembling the rotating seat 2121 using bolts. Subsequently, the end of the rotating seat 2121 is rotatably connected to a pneumatic support bar 2122. Under normal conditions, the pneumatic support bar 2122 can be in a horizontal state to support the metal can 6. The rotation plane of the pneumatic support bar 2122 is set parallel to the conveying direction of the metal can 6, that is, it can rotate vertically. In order to avoid affecting the movement of other metal cans 6, the aforementioned pneumatic support bar 2122 can also rotate downward. Correspondingly, in order to ensure that the metal cans 6 passing above it can be conveyed normally, pneumatic oblique holes 2123 are arranged above the pneumatic support bar 2122. The specific structure of the aforementioned rejection action controller 213 is as follows: the rejection action controller 213 includes an air supply pipe 2132 connected to the air delivery support bar 2122. The air supply pipe 2132 is a conventional rigid pipe structure, and the air delivery support bar 2122 and the air supply pipe 2132 adopt a detachable plug-in structure to ensure that the current air supply pipe 2132 can continue to be used when the air delivery support bar 2132 is replaced. Then, one end of the air supply pipe 2132 is connected to the air delivery inclined hole 2123, and the other end is provided with an air outlet 2133 and connected to... With the external air source structure connected, once the external air source is turned on, air can be blown from the air delivery oblique hole 2132. There can be one external air source, which is then connected to the air outlet 2133 by branching from a main pipe. For easy individual control, each branch pipe can be equipped with an independent solenoid valve. In order to drive the air delivery support bar 2122 to rotate, the end of the air delivery pipe 2132 away from the air delivery support bar 2122 is also connected to the end of the telescopic unit 2131 and is moved by the telescopic unit 2131.

[0033] It should be noted that the aforementioned air delivery support bar 2122 needs to be horizontal under normal conditions, which requires it to be able to automatically reset. The way to achieve the rotation switching state of the air delivery support bar 2122 is as follows: a torsion spring is set between the air delivery support bar 2122 and the rotating seat 2121, and the end of the air delivery support bar 2122 away from the rotating seat 2121 is a slope and abuts against the conventional air delivery mechanism 22. Under the action of the torsion spring, the air delivery support bar 2122 can abut against the conventional air delivery mechanism 22, thereby achieving a horizontal state. When changing the state, the telescopic unit 2131 can drive the air supply pipe 2132, and the air supply pipe 2132 can pull and rotate. After the metal can 6 is dropped, the output end of the telescopic unit 2131 can be extended. Under the action of the torsion spring, the aforementioned air delivery support bar 2122 can be normally reset and achieve a horizontal state.

[0034] Furthermore, in the above structure, to prevent the metal can 6 from stopping on the packaging line, within the same time period, the same metal can 6 is moved by at least two adjacent air conveying inclined holes 2123 in the conveying direction of the metal can 6. In other words, the normal transfer of the metal can 6 between the air conveying inclined holes 2123 can be carried out normally.

[0035] The above structure enables the addition of a rejection mechanism 21 to the existing pneumatic conveying mechanism. This allows the metal cans 6 to be removed from the packaging line without shutting down the machine, and the rejection process does not affect other normal metal cans 6. Furthermore, the rejection mechanism 21 can be reset normally after rejecting the corresponding metal can 6, thus preventing subsequent metal cans 6 from being affected.

[0036] In a preferred embodiment, to avoid affecting other metal cans 6 when removing deformed metal cans 6, each metal can 6 is supported by at least four adjacent pneumatic support bars 2122 within the same time period, and the same metal can 6 cannot span six adjacent pneumatic support bars 2122. When two adjacent metal cans 6 pass close together through the removal mechanism 21, even if one needs to be removed, it can be ensured that the other normal metal can 6 has a sufficient number of pneumatic support bars 2122 for support during the removal process, thus preventing it from tilting or falling. Furthermore, in the above structure, the length of the pneumatic support bar 2122 is less than 3 / 2 of the diameter of the metal can 6. That is to say, the pneumatic support bar 2122 cannot accommodate two metal cans 6, which ensures that during the removal process, the metal can 6 removed in front or behind will affect the normal pneumatic conveying process of the adjacent metal cans 6.

[0037] Therefore, in the above structure, in order to ensure that the deformed metal can 6 can be removed normally, after the four adjacent pneumatic support bars 2122 are rotated downwards to their limit positions at the same time, the resulting gap can be passed vertically through the metal can 6.

[0038] The close proximity of the pneumatic support bars 2122 makes it difficult to accurately determine the edge line of each bar. Therefore, to facilitate identification of how many pneumatic support bars 2122 the metal can 6 spans, a reflective coating is applied to the upper surface of each bar 2122, with adjacent bars using different colors of reflective coating. This allows for a tilted view of the boundary of each pneumatic support bar 2122, making it easier to identify which bar 2122 specifically supports the metal can 6.

[0039] The conventional manual screening process is complex and slow, and cannot be completed for fast-moving metal cans. Therefore, to replace manual labor in the rejection process, this invention also discloses an automatic rejection method for a metal can pneumatic conveying device with rejection function. Thus, a main control terminal is required. The output of the main control terminal is connected to each telescopic unit 2131, and the input is connected to a visual recognition camera. The visual recognition camera is positioned above the rejection mechanism 21, and a blocking mechanism 3 is positioned between the rejection mechanism 21 and the visual camera. Figure 7 The transparent shield 32 shown is used to avoid affecting the image acquisition of the visual camera;

[0040] In use, the specific steps are as follows: the main control terminal acquires the current image through a visual recognition camera; then, the image is cropped so that the image range is limited to the location of the removal mechanism 21; when the deformed metal can 6 is detected, the current image is processed in grayscale. Under normal conditions, the grayscale image of the pneumatic support bar 2122 has two different grayscale values ​​with intervals. When it is blocked by the metal can, a third grayscale value is generated. Therefore, after binarizing the above image according to the preset grayscale value, it is possible to accurately determine which specific pneumatic support bars 2122 are blocked by the metal can. Accordingly, the main control terminal can drive the corresponding telescopic unit 2131 to rotate the pneumatic support bar 2122 downwards, causing the metal can 6 to fall.

Claims

1. A metal can pneumatic conveying device with rejection function, disposed between a front conveying mechanism (1) and a rear conveying mechanism (5), characterized in that, Includes a pneumatic conveying body (2) that is on the same horizontal plane as the front conveying mechanism (1) and the rear conveying mechanism (5); The pneumatic conveying body (2) includes a rejection mechanism (21) and a conventional pneumatic conveying mechanism (22) arranged along the conveying direction of the metal can (6). The rejection mechanism (21) includes a mounting frame (211) fixed to the front conveying mechanism (1). The mounting frame (211) is arranged with multiple rotating rejection units (212) in a direction perpendicular to the conveying direction of the metal can (6). The rotating rejection units (212) are respectively connected to rejection action controllers (213). The rejection action controllers (213) can drive the rotating rejection units (212) to rotate downward from the horizontal state. The upper surface of the rotating rejection units (212) and the upper surface of the conventional pneumatic conveying mechanism (22) are provided with pneumatic conveying inclined holes (2123). The opening direction of the pneumatic conveying inclined holes (2123) is the same as the conveying direction of the metal can (6) and is inclined upward. A shielding mechanism (3) is provided above the air conveying body (2), and the metal can (6) can pass through the air conveying body (2) and the shielding mechanism (3), and the height between the air conveying body (2) and the shielding mechanism (3) is not high enough to allow the metal can (6) to tip over.

2. The metal can pneumatic conveying device with rejection function according to claim 1, characterized in that, The rotating rejection unit (212) includes a rotating seat (2121) detachably connected to the mounting frame (211). The end of the rotating seat (2121) is rotatably connected to a pneumatic support bar (2122), and the rotation plane of the pneumatic support bar (2122) is arranged parallel to the conveying direction of the metal can (6). Pneumatic oblique holes (2123) are arranged above the pneumatic support bar (2122).

3. A metal can pneumatic conveying device with rejection function according to claim 2, characterized in that, During the same time period, a single metal can (6) passing through the rejection mechanism (21) is supported by at least four adjacent pneumatic support bars (2122).

4. A metal can pneumatic conveying device with rejection function according to claim 2, characterized in that, The rejection action controller (213) includes an air supply pipe (2132) connected to the air delivery support bar (2122). One end of the air supply pipe (2132) is connected to the air delivery inclined hole (2123), and the other end is provided with an air supply port (2133) and connected to an external air source structure. The end of the air supply pipe (2132) away from the air delivery support bar (2122) is also connected to the end of the telescopic unit (2131) and is moved by the telescopic unit (2131).

5. A metal can pneumatic conveying device with rejection function according to claim 4, characterized in that, A torsion spring is provided between the air delivery support bar (2122) and the rotating seat (2121), and the end of the air delivery support bar (2122) away from the rotating seat (2121) is inclined and abuts against the conventional air delivery mechanism (22). The air delivery support bar (2122) can abut against the conventional air delivery mechanism (22) under the action of the torsion spring, and can be driven by the telescopic unit (2131) to drive the air delivery pipe (2132) and then pulled by the air delivery pipe (2132) to rotate.

6. A metal can pneumatic conveying device with rejection function according to claim 2, characterized in that, The length of the pneumatic support bar (2122) is less than 3 / 2 of the diameter of the metal tank (6).

7. A metal can pneumatic conveying device with rejection function according to claim 6, characterized in that, After the four adjacent air-supported bars (2122) rotate downwards to their limit positions at the same time, the resulting gap can be vertically passed through by the metal tank (6).

8. A metal can pneumatic conveying device with rejection function according to claim 2, characterized in that, During the same time period, a single metal can (6) passing through the rejection mechanism (21) is blown and moved by at least two adjacent air conveying oblique holes (2123) in the conveying direction of the metal can (6).

9. A metal can pneumatic conveying device with rejection function according to any one of claims 2-8, characterized in that, The upper surface of the air conveying support strip (2122) is provided with a reflective coating, and the reflective coatings of adjacent air conveying support strips (2122) are of different colors.

10. An automatic rejection method for a metal can pneumatic conveying device with rejection function according to claim 9, characterized in that, A main control terminal is also provided. The output end of the main control terminal is connected to each telescopic unit (2131), and the input end is connected to a visual recognition camera. The visual recognition camera is set above the rejection mechanism (21), and the blocking mechanism (3) sets a transparent blocking plate (32) between the rejection mechanism (21) and the visual camera. After the visual recognition camera detects the deformed metal can (6), the main control terminal can drive the corresponding telescopic unit (2131) to drive the air conveying support bar (2122) to rotate downward.

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