Bottle cap detection apparatus

Abstract

The application discloses a bottle cap detection device, comprising: a rack; an upper negative pressure conveying belt assembly arranged on the rack and used for conveying bottle caps to expose bottom regions of the bottle caps; a lower negative pressure conveying belt assembly arranged on the rack and used for conveying bottle caps to expose top regions of the bottle caps; a first visual detection device arranged below the upper negative pressure conveying belt assembly and used for detecting the bottom regions of the bottle caps; a second visual detection device arranged above the lower negative pressure conveying belt assembly and used for detecting the top regions of the bottle caps; and a third visual detection device comprising a cover body with a shadowless light source through which the lower negative pressure conveying belt assembly passes, and a plurality of cameras, wherein an inner wall of the cover body is provided with a diffuse reflection coating, the plurality of cameras are distributed on a circumferential side of the cover body, and the cover body is provided with a avoiding opening used for allowing the cameras to detect side surface regions of the bottle caps. When the side surface regions of the bottle caps are detected, the above structure is beneficial to reducing the influence of light reflection of an environment in which the bottle caps are located.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bottle cap detection, and particularly relates to a bottle cap detection device. BACKGROUND

[0002] A bottle cap is a common filling accessory, which is used for sealing a filling port of a filling container (a glass bottle, a plastic bottle, etc. filled with liquid). Before assembling the bottle cap to the filling port of the filling container, the bottle cap needs to be detected to ensure that the bottle cap meeting the requirements in appearance, size, printing, label, etc. enters the assembly process.

[0003] In the prior art, a visual detection technology is usually used to detect a bottom region, a top region and a side region of the bottle cap. Specifically, an upper negative pressure conveying belt assembly and a lower negative pressure conveying belt assembly which are partially overlapped and arranged in an up-down staggered manner are used to cooperate with feeding. The upper negative pressure conveying belt assembly and the lower negative pressure conveying belt assembly both absorb and convey the bottle cap by means of vacuum adsorption. When the bottle cap is conveyed by the upper negative pressure conveying belt assembly, the bottom region of the bottle cap is exposed, so that the bottom region of the bottle cap can be detected by the visual detection technology. When the bottle cap is conveyed by the lower negative pressure conveying belt assembly, the top region of the bottle cap is exposed, so that the top region of the bottle cap can be detected by the visual detection technology. When the side region of the bottle cap is detected, the light illumination on the bottle cap is not uniform due to the non-ideal light illumination environment of the bottle cap, so that a shadow is generated, and the visual detection is affected. Therefore, a cover with a light source is arranged on a conveying path of the bottle cap to provide light for the bottle cap in the related technology. However, the light reflection of the environment where the bottle cap is located affects the light providing effect of the bottle cap, and the problem of non-uniform light illumination on the bottle cap still exists. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a bottle cap detection device, which is beneficial to reduce the influence of light reflection of the environment where the bottle cap is located when the side region of the bottle cap is detected, so as to be beneficial to improve the uniformity of light illumination on the bottle cap.

[0005] The bottle cap detection device according to the embodiments of the present application comprises: a rack; an upper negative pressure conveying belt assembly arranged on the rack and used for conveying bottle caps to be detected to expose bottom regions of the bottle caps; a lower negative pressure conveying belt assembly arranged on the rack and used for conveying the bottle caps fed by the upper negative pressure conveying belt assembly to expose top regions of the bottle caps; a first visual detection device arranged below the upper negative pressure conveying belt assembly and used for detecting the bottom regions of the bottle caps; a second visual detection device arranged above the lower negative pressure conveying belt assembly and used for detecting the top regions of the bottle caps; and a third visual detection device comprising a cover with shadowless light sources through which the lower negative pressure conveying belt assembly passes, and a plurality of cameras distributed on the periphery of the cover, wherein the inner wall of the cover is provided with a diffuse reflection coating, and the cover is provided with avoiding openings for the cameras to detect side surface regions of the bottle caps.

[0006] The bottle cap detection device according to the embodiments of the present application has at least the following beneficial effects: first, the upper negative pressure conveying belt assembly is used to convey bottle caps to be detected to expose bottom regions of the bottle caps, and the first visual detection device arranged below the upper negative pressure conveying belt assembly is used to detect the bottom regions of the bottle caps conveyed by the upper negative pressure conveying belt assembly; second, the lower negative pressure conveying belt assembly is used to convey the bottle caps fed by the upper negative pressure conveying belt assembly to expose top regions of the bottle caps, and the second visual detection device arranged above the lower negative pressure conveying belt assembly is used to detect the top regions of the bottle caps conveyed by the lower negative pressure conveying belt assembly; and finally, the lower negative pressure conveying belt assembly passes through the cover with shadowless light sources, the shadowless light sources of the cover provide light for the bottle caps conveyed by the lower negative pressure conveying belt assembly and entering the cover, and the plurality of cameras distributed on the periphery of the cover are used to detect the side surface regions of the bottle caps entering the cover. When detecting the side surface regions of the bottle caps, the diffuse reflection coating arranged on the inner wall of the cover enables the light provided by the shadowless light sources of the cover to be diffusely reflected, thereby reducing the influence of light reflection of the environment of the bottle caps and improving the uniformity of the light illumination of the bottle caps.

[0007] According to some embodiments of the present application, the bottle cap detection device further comprises a receiving part arranged on the rack and used for being connected with a discharging end of an external feeding mechanism to receive bottle caps fed by the discharging end of the external feeding mechanism, one end of the upper negative pressure conveying belt assembly close to the receiving part is located directly above the receiving part, the upper negative pressure conveying belt assembly is used for adsorbing the bottle caps received by the receiving part and conveying the adsorbed bottle caps, and the receiving part is provided with a blowing port used for being connected with a positive pressure air source and blowing air to the bottom of the bottle caps received by the receiving part.

[0008] According to some embodiments of the present application, the bottle cap detection device further comprises a negative pressure generating device, the negative pressure generating device has an air inlet end and an air outlet end, the air inlet end is connected to the upper negative pressure conveying belt assembly through a pipeline, and the air outlet end is connected to the air blowing port through a pipeline.

[0009] According to some embodiments of the present application, the material receiving part has a portion extending from the air blowing port along the feeding direction of the upper negative pressure conveying belt assembly, and the portion is provided with a plurality of air blowing holes connected to the positive pressure air source and distributed along the feeding direction of the upper negative pressure conveying belt assembly, and the air blowing holes are used for upward air blowing.

[0010] According to some embodiments of the present application, the inside of the material receiving part is provided with a positive pressure cavity, and a constant pressure valve is arranged in the positive pressure cavity to divide the positive pressure cavity into a first chamber and a second chamber in communication with each other, the first chamber is connected to the positive pressure air source, the constant pressure valve is used to maintain the pressure in the second chamber, the air blowing port is communicated with the first chamber, and the air blowing hole is communicated with the second chamber.

[0011] According to some embodiments of the present application, the material receiving part is provided with a limiting groove extending along the feeding direction of the upper negative pressure conveying belt assembly and used for accommodating the bottle cap, an end of the limiting groove is an open structure, and the air blowing port is located at the bottom of the limiting groove.

[0012] According to some embodiments of the present application, the bottle cap detection device further comprises an open-top material collecting hopper, the material collecting hopper is arranged directly below the upper negative pressure conveying belt assembly, and the material collecting hopper is used for recycling the dropped bottle caps.

[0013] According to some embodiments of the present application, the upper negative pressure conveying belt assembly comprises a first support, a driving motor, a roller and an annular conveying belt, the first support is arranged on the rack and extends along the feeding direction of the upper negative pressure conveying belt assembly, both ends of the first support are provided with the roller, the annular conveying belt is arranged outside the first support, the driving motor is arranged on the first support and used for driving the annular conveying belt to act, the inside of the first support is provided with a negative pressure cavity connected to the negative pressure air source, and the annular conveying belt is provided with an adsorption hole capable of being communicated with the negative pressure cavity and used for adsorbing the bottle cap.

[0014] According to some embodiments of the present application, the rack is provided with a height adjusting structure corresponding to the upper negative pressure conveying belt assembly, and the height adjusting structure is used for adjusting the height of the upper negative pressure conveying belt assembly.

[0015] According to some embodiments of the present application, the height adjusting structure comprises a second support, a movable connecting member, a screw rod assembly and a driving member, the second support is arranged on the rack, the movable connecting member is movably connected to the second support and connected to the first support, the screw rod assembly is arranged between the second support and the movable connecting member, and the driving member is connected to the screw rod assembly and used to drive the movable connecting member to move up and down relative to the second support.

[0016] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0018] Figure 1 is a structural schematic view of a bottle cap detection equipment according to an embodiment of the present application;

[0019] Figure 2 is a structural schematic view of the bottle cap detection equipment according to an embodiment of the present application from another perspective;

[0020] Figure 3 is a structural schematic view of the bottle cap detection equipment according to an embodiment of the present application from yet another perspective;

[0021] Figure 4 is a partial structural schematic view of the bottle cap detection equipment according to an embodiment of the present application regarding a material receiving part;

[0022] Figure 5 is a partial structural schematic view of the bottle cap detection equipment according to an embodiment of the present application regarding a material receiving part; Figure 4 is a partial enlarged view of A in FIG. 1;

[0023] Figure 6 is a partial structural schematic view of the bottle cap detection equipment according to an embodiment of the present application regarding a material receiving part; Figure 4 is a sectional view of the structure shown in FIG. 1;

[0024] Figure 7 is a partial enlarged view of B in FIG. 1; Figure 6

[0025] Figure 8 is a state schematic view of the bottle cap detection equipment according to an embodiment of the present application when transferring bottle caps between the material receiving part and the upper negative pressure conveying belt assembly;

[0026] Figure 9 is a partial structural schematic view of the structure shown in FIG. 1; Figure 1

[0027] Figure 10 is a structural schematic view of the upper negative pressure conveying belt assembly according to an embodiment of the present application; ​​

[0028] Figure 11 is Figure 10 is a sectional view of the structure shown in Fig. 1;

[0029] Figure 12 is Figure 11 is a partial enlarged view of C in Fig. 1.

[0030] Reference signs:

[0031] bottle cap a, rack 100, second support 110, guide column 111, movable connecting piece 120, guide sleeve 121, screw rod assembly 130, driving piece 140, upper layer negative pressure conveying belt assembly 200, first support 210, negative pressure cavity 211, driving motor 220, roller 230, annular conveying belt 240, adsorption hole 241, lower layer negative pressure conveying belt assembly 300, first visual detection device 400, second visual detection device 500, third visual detection device 600, cover body 610, avoiding opening 611, camera 620, material receiving part 700, air blowing opening 710, air blowing hole 720, constant pressure valve 730, first cavity 740, second cavity 750, limiting groove 760, negative pressure generating device 800, air inlet end 810, air outlet end 820, material collecting hopper 900. DETAILED DESCRIPTION

[0032] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and should not be construed as limiting the present application.

[0033] In the description of the present application, it should be understood that, if the orientation description is involved, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0034] In the description of the present application, if the words such as several, more than, less than, exceed, above, below, within, etc. appear, the meaning of several is one or more, the meaning of more than is two or more, more than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.

[0035] In the description of the present application, if the words such as first, second, etc. appear, they are only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0036] In the description of the present application, the words such as arrangement, installation, connection and the like should be understood in a broad sense unless otherwise explicitly limited, and the specific meanings of the above words in the present application can be reasonably determined by those skilled in the art in combination with the specific content of the technical solutions.

[0037] Referring to Figures 1 to 12 According to the bottle cap detection device of the embodiments of the present application, the bottle cap detection device comprises a rack 100, an upper layer negative pressure conveying belt assembly 200, a lower layer negative pressure conveying belt assembly 300, a first visual detection device 400, a second visual detection device 500 and a third visual detection device 600.

[0038] Specifically, the upper layer negative pressure conveying belt assembly 200 is arranged on the rack 100 and is used for conveying the bottle cap a to be detected, so that the bottom region of the bottle cap a is exposed, the lower layer negative pressure conveying belt assembly 300 is arranged on the rack 100 and is used for conveying the bottle cap a fed by the upper layer negative pressure conveying belt assembly 200, so that the top region of the bottle cap a is exposed, the first visual detection device 400 is arranged below the upper layer negative pressure conveying belt assembly 200 and is used for detecting the bottom region of the bottle cap a, the second visual detection device 500 is arranged above the lower layer negative pressure conveying belt assembly 300 and is used for detecting the top region of the bottle cap a, and the third visual detection device 600 comprises a cover body 610 with shadowless light source through which the lower layer negative pressure conveying belt assembly 300 passes, and a plurality of cameras 620, the inner wall of the cover body 610 is provided with a diffuse reflection coating, the plurality of cameras 620 are distributed on the circumferential side of the cover body 610, and the cover body 610 is provided with an avoiding opening 611 for the camera 620 to detect the side region of the bottle cap a.

[0039] The shadowless light source is a known technology, and its specific structure and working principle will not be described here.

[0040] The detection process of the bottle cap a is as follows: first, the bottle cap a to be detected is conveyed by the upper layer negative pressure conveying belt assembly 200, so that the bottom region of the bottle cap a is exposed, at the same time, the first visual detection device 400 arranged below the upper layer negative pressure conveying belt assembly 200 detects the bottom region of the bottle cap a conveyed by the upper layer negative pressure conveying belt assembly 200. Secondly, the bottle cap a fed by the upper layer negative pressure conveying belt assembly 200 is conveyed by the lower layer negative pressure conveying belt assembly 300, so that the top region of the bottle cap a is exposed, at the same time, the second visual detection device 500 arranged above the lower layer negative pressure conveying belt assembly 300 detects the top region of the bottle cap a conveyed by the lower layer negative pressure conveying belt assembly 300. Finally, the lower layer negative pressure conveying belt assembly 300 passes through the cover body 610 with shadowless light source, the shadowless light source of the cover body 610 supplies light for the bottle cap a conveyed by the lower layer negative pressure conveying belt assembly 300 into the inside of the cover body 610, at the same time, the plurality of cameras 620 distributed on the circumferential side of the cover body 610 detect the side region of the bottle cap a into the inside of the cover body 610.

[0041] When the side area of the bottle cap a is detected, the inner wall of the cover body 610 is provided with a diffuse reflection coating, so that the light provided by the shadowless light source of the cover body 610 can be diffusely reflected when it irradiates the inner wall of the cover body 610, thereby facilitating the reduction of the influence of light reflection of the environment of the bottle cap a, and further facilitating the improvement of the uniformity of the light illumination of the bottle cap a.

[0042] Specifically, the visual detection technology is a known technology, wherein the first visual detection device 400 and the second visual detection device 500 both adopt a relatively conventional visual detection structure, and the specific structure and working principle thereof will not be described here.

[0043] It should be noted that in some embodiments, the diffuse reflection coating adopts a nano coating, which is beneficial to improve the diffuse reflection effect. Of course, the diffuse reflection coating can also be formed by coating other diffuse reflection paint, which is not limited here.

[0044] It should be noted that in some embodiments, the plurality of cameras 620 on the periphery of the cover body 610 are arranged in a ring array, wherein the periphery of the cover body 610 is provided with four cameras 620, each camera 620 is responsible for a range of 90°, and the four cameras 620 can detect the side area of the bottle cap a without dead angle. Of course, three cameras 620 or more cameras 620 can also be provided to detect the side area of the bottle cap a, which is not limited here.

[0045] Specifically, the camera 620 is an industrial camera.

[0046] Referring to Figures 1 to 9In some embodiments, the bottle cap detection device further comprises a receiving part 700 arranged on the rack 100 and configured to be connected to the discharge end of the external feeding mechanism to receive the bottle caps a fed by the discharge end of the external feeding mechanism, and the end of the upper negative pressure conveying belt assembly 200 close to the receiving part 700 is located directly above the receiving part 700, and the upper negative pressure conveying belt assembly 200 is configured to adsorb the bottle caps a received by the receiving part 700 and convey the adsorbed bottle caps a, and the receiving part 700 is provided with a blowing port 710 configured to be connected to the positive pressure source and blow air to the bottom of the bottle caps a received by the receiving part 700. In use, the receiving part 700 receives the bottle caps a fed by the discharge end of the external feeding mechanism, and the end of the upper negative pressure conveying belt assembly 200 close to the receiving part 700 is located directly above the receiving part 700, so that the upper negative pressure conveying belt assembly 200 can adsorb the bottle caps a received by the receiving part 700 and convey the adsorbed bottle caps a along the feeding direction of the upper negative pressure conveying belt assembly 200 to expose the bottom area of the bottle caps a, so that the first visual detection device 400 can detect the bottom area of the bottle caps a. Further, the receiving part 700 is provided with the blowing port 710 configured to be connected to the positive pressure source and blow air to the bottom of the bottle caps a received by the receiving part 700, and while the upper negative pressure conveying belt assembly 200 adsorbs the bottle caps a received by the receiving part 700, the positive pressure source blows air to the bottom of the bottle caps a received by the receiving part 700 through the blowing port 710 to assist the bottle caps a to be separated from the support of the receiving part 700 and be adsorbed on the upper negative pressure conveying belt assembly 200. The above structure is beneficial to improve the response speed of transferring the bottle caps a to the upper negative pressure conveying belt assembly 200, and is also beneficial to the upper negative pressure conveying belt assembly 200 to adsorb the bottle caps a more stably.

[0047] With reference to Figure 8 In some embodiments, the bottle cap detection device further comprises a negative pressure generating device 800 having an air inlet end 810 and an air outlet end 820, the air inlet end 810 of the negative pressure generating device 800 is connected to the upper negative pressure conveying belt assembly 200 through a pipeline, and the air outlet end 820 of the negative pressure generating device 800 is connected to the blowing port 710 through a pipeline. In use, the air inlet end 810 of the negative pressure generating device 800 provides negative pressure for the upper negative pressure conveying belt assembly 200 to adsorb the bottle caps a, and the air outlet end 820 of the negative pressure generating device 800 provides positive pressure for the blowing port 710 to blow the bottle caps a, so as to realize the recycling of air flow, which is beneficial to reduce energy consumption compared with the case of using independent negative pressure source and positive pressure source.

[0048] With reference to Figures 4 to 8In some embodiments, the receiving part 700 has a portion extending from the blowing port 710 along the feeding direction of the upper negative pressure conveying belt assembly 200, and the portion is provided with a plurality of blowing holes 720 connected to the positive pressure air source and distributed along the feeding direction of the upper negative pressure conveying belt assembly 200, and the blowing holes 720 are used for upward blowing. The air flow blown upward by the blowing holes 720 can provide a certain supporting force for the bottle caps a conveyed by the conveying area of the upper negative pressure conveying belt assembly 200 which has adsorbed the bottle caps a and is close to the transfer position (i.e. the position where the bottle caps a are adsorbed), thereby preventing the bottle caps a conveyed by the upper negative pressure conveying belt assembly 200 from falling off.

[0049] Specifically, the diameter of the blowing hole 720 is smaller than the diameter of the blowing port 710.

[0050] Referring to Figures 6 to 8 In some embodiments, the receiving part 700 is internally provided with a positive pressure cavity, and a constant pressure valve 730 is arranged in the positive pressure cavity to divide the positive pressure cavity into a first chamber 740 and a second chamber 750 which are in communication with each other, the first chamber 740 is used to be connected to the positive pressure air source, the constant pressure valve 730 is used to maintain the pressure in the second chamber 750, the blowing port 710 is communicated with the first chamber 740, and the blowing hole 720 is communicated with the second chamber 750. In use, the same positive pressure air source can be used to supply air to the blowing port 710 and the blowing hole 720 at the same time. The constant pressure valve 730 is used to maintain the pressure in the second chamber 750, so that the blowing hole 720 can stably provide a suitable air flow for assisting the supporting of the bottle caps a conveyed by the upper negative pressure conveying belt assembly 200.

[0051] Specifically, the first chamber 740 is connected to the air outlet end 820 of the negative pressure generating device 800 through a pipeline.

[0052] Specifically, the constant pressure valve 730 automatically adjusts the pressure in the second chamber 750 by using a diaphragm and a compression spring, so that the pressure in the second chamber 750 is stabilized at a preset pressure value. The constant pressure valve is a known technology, and its specific structure and working principle will not be described here.

[0053] Referring to Figures 4 to 7 In some embodiments, the receiving part 700 is provided with a limiting groove 760 extending along the feeding direction of the upper negative pressure conveying belt assembly 200 and used for accommodating the bottle caps a, thereby preventing the bottle caps a received by the receiving part 700 from falling off. The end of the limiting groove 760 is of an open structure, so as to facilitate the receiving of the bottle caps a fed by the discharge end of the external feeding mechanism. The blowing port 710 is located at the bottom of the limiting groove 760, so as to facilitate the blowing of air to the bottom of the bottle caps a received by the receiving part 700.

[0054] Referring to Figure 1 , Figure 3 and Figure 9In some embodiments, the bottle cap detection device further comprises an open-top collecting hopper 900 arranged directly below the upper negative pressure conveying belt assembly 200, and the collecting hopper 900 is used to collect the fallen bottle caps a. When the bottle caps a conveyed by the upper negative pressure conveying belt assembly 200 fall accidentally, they can be collected by the collecting hopper 900.

[0055] With reference to Figures 10 to 12 In some embodiments, the upper negative pressure conveying belt assembly 200 comprises a first support 210, a driving motor 220, a roller 230 and an endless conveying belt 240. The first support 210 is arranged on the frame 100 and extends along the feeding direction of the upper negative pressure conveying belt assembly 200. Both ends of the first support 210 are provided with the roller 230. The endless conveying belt 240 is arranged outside the first support 210. The driving motor 220 is arranged on the first support 210 and used to drive the endless conveying belt 240. The inside of the first support 210 is provided with a negative pressure cavity 211 connected to a negative pressure source. The endless conveying belt 240 is provided with suction holes 241 which can be connected to the negative pressure cavity 211 and used to adsorb the bottle caps a. The structure is simple and easy to implement.

[0056] It should be noted that in some embodiments, the output shaft of the driving motor 220 is connected to one of the rollers 230 to drive the roller 230 to rotate, thereby driving the endless conveying belt 240 to move.

[0057] It should be noted that in some other embodiments, the first support 210 is provided with a tensioning assembly comprising a plurality of tensioning rollers. The output shaft of the driving motor 220 is connected to one of the tensioning rollers to drive the tensioning roller to rotate. The endless conveying belt 240 is arranged around the tensioning roller, so that the tensioning roller can drive the endless conveying belt 240 to move when the tensioning roller rotates.

[0058] Specifically, one end of the lower negative pressure conveying belt assembly 300 close to the upper negative pressure conveying belt assembly 200 is located directly below the other end of the upper negative pressure conveying belt assembly 200 away from the receiving part 700. The lower negative pressure conveying belt assembly 300 is used to adsorb the bottle caps a fed by the upper negative pressure conveying belt assembly 200 and convey the adsorbed bottle caps a.

[0059] The negative pressure conveying belt assembly is a known technology. The specific structure of the upper negative pressure conveying belt assembly 200 is applicable to the lower negative pressure conveying belt assembly 300. That is, the structure of the lower negative pressure conveying belt assembly 300 is the same as that of the upper negative pressure conveying belt assembly 200, and the two only differ in spatial position.

[0060] It should be noted that in some embodiments, the height adjusting structure is arranged on the rack 100 corresponding to the upper layer negative pressure conveying belt assembly 200, and is used to adjust the height of the upper layer negative pressure conveying belt assembly 200, so as to adapt to bottle caps a of different height sizes.

[0061] With reference to Figures 1 to 3 And Figure 9 In some embodiments, the height adjusting structure includes a second support 110, a movable connecting piece 120, a screw rod assembly 130 and a driving piece 140. The second support 110 is arranged on the rack 100. The movable connecting piece 120 is movably connected to the second support 110 and connected to the first support 210. The screw rod assembly 130 is arranged between the second support 110 and the movable connecting piece 120. The driving piece 140 is connected to the screw rod assembly 130 and is used to drive the movable connecting piece 120 to move up and down relative to the second support 110. The structure is simple and easy to implement.

[0062] It should be noted that in some embodiments, at least two guide columns 111 are arranged on the second support 110 in an interval. A guide sleeve 121 is arranged on the movable connecting piece 120 and penetrates the guide column 111, so that the movable connecting piece 120 can move up and down relative to the second support 110.

[0063] It should be noted that in some other embodiments, a guide sliding groove is arranged on the second support 110 in an interval. A sliding block is arranged on the movable connecting piece 120 and slidably connected to the guide sliding groove, so that the movable connecting piece 120 can move up and down relative to the second support 110.

[0064] It should be noted that in some embodiments, the nut of the screw rod assembly 130 is fixedly arranged on the second support 110, and the screw rod of the screw rod assembly 130 is connected to the movable connecting piece 120. At this time, when the driving piece 140 drives the screw rod of the screw rod assembly 130 to rotate, the nut of the screw rod assembly 130 is fixed and does not move, so as to drive the screw rod of the screw rod assembly 130 to move up and down, thereby driving the movable connecting piece 120 to move up and down relative to the second support 110, and further driving the first support 210 to move up and down relative to the second support 110, so as to adjust the height of the upper layer negative pressure conveying belt assembly 200.

[0065] It should be noted that in some other embodiments, the nut of the screw rod assembly 130 is fixedly arranged on the movable connecting piece 120, and the screw rod of the screw rod assembly 130 is rotatably arranged between the second support 110 and the rack 100. At this time, when the driving member 140 drives the screw rod of the screw rod assembly 130 to rotate, the screw rod of the screw rod assembly 130 can only rotate to drive the nut of the screw rod assembly 130 to move up and down, thereby driving the movable connecting piece 120 to move up and down relative to the second support 110, and further driving the first support 210 to move up and down relative to the second support 110, so as to adjust the height of the upper negative pressure conveying belt assembly 200.

[0066] Specifically, the driving member 140 is a hand wheel, and of course, the driving member 140 can also be a motor, which is not limited here.

[0067] It should be noted that in some other embodiments, the height of the upper negative pressure conveying belt assembly 200 can also be adjusted by a linear driving structure such as an electric push rod, a pneumatic cylinder, an oil cylinder, etc., which is not limited here.

[0068] In the description of the present specification, if the description involves the description of the terms such as "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" and "some examples", it means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A bottle cap inspection apparatus characterized by comprising: The bottle cap detection device comprises: a rack; an upper negative pressure conveying belt assembly arranged on the rack and used for conveying bottle caps to be detected to expose the bottom region of the bottle caps; a lower negative pressure conveying belt assembly arranged on the rack and used for conveying the bottle caps fed by the upper negative pressure conveying belt assembly to expose the top region of the bottle caps; a first visual detection device arranged below the upper negative pressure conveying belt assembly and used for detecting the bottom region of the bottle caps; a second visual detection device arranged above the lower negative pressure conveying belt assembly and used for detecting the top region of the bottle caps; a third visual detection device comprising a cover with a shadowless light source through which the lower negative pressure conveying belt assembly passes, and a plurality of cameras, the inner wall of the cover is provided with a diffuse reflection coating, and the plurality of cameras are distributed on the lateral side of the cover, and the cover is provided with a bypass opening for the cameras to detect the side region of the bottle caps; The bottle cap detection device further comprises a receiving part arranged on the rack and used for being connected with the discharge end of an external feeding mechanism to receive the bottle caps fed by the discharge end of the external feeding mechanism, one end of the upper negative pressure conveying belt assembly located above the receiving part, the upper negative pressure conveying belt assembly is used for adsorbing the bottle caps received by the receiving part and conveying the adsorbed bottle caps, and the receiving part is provided with a blowing port used for being connected with a positive pressure air source and blowing air to the bottom of the bottle caps received by the receiving part; The receiving part has a part extending from the blowing port along the feeding direction of the upper negative pressure conveying belt assembly, and the part is provided with a plurality of blowing holes used for being connected with a positive pressure air source and distributed along the feeding direction of the upper negative pressure conveying belt assembly, the blowing holes are used for upward blowing, and the diameter of the blowing holes is smaller than the diameter of the blowing port; The inside of the receiving part is provided with a positive pressure cavity, and a constant pressure valve is arranged in the positive pressure cavity to divide the positive pressure cavity into a first chamber and a second chamber in communication with each other, the first chamber is used for being connected with a positive pressure air source, the constant pressure valve is used for maintaining the pressure in the second chamber, the blowing port is communicated with the first chamber, and the blowing holes are communicated with the second chamber.

2. The bottle cap inspection apparatus according to claim 1, wherein The bottle cap detection device further comprises a negative pressure generating device having an air inlet end and an air outlet end, the air inlet end is connected with the upper negative pressure conveying belt assembly through a pipeline, and the air outlet end is connected with the first chamber through a pipeline, and the air outlet end is used for providing the blowing port with positive pressure to blow up the bottle caps.

3. The bottle cap inspection apparatus according to claim 1, wherein The receiving part is provided with a limiting groove extending along the feeding direction of the upper negative pressure conveying belt assembly and used for accommodating the bottle caps, the end of the limiting groove is an open structure, and the blowing port is located at the bottom of the limiting groove.

4. The bottle cap inspection apparatus according to claim 1, wherein The bottle cap detection device further comprises an open-top material collecting hopper arranged directly below the upper negative pressure conveying belt assembly, and the material collecting hopper is used for recycling the dropped bottle caps.

5. The bottle cap inspection apparatus according to claim 1, wherein The upper layer negative pressure conveying belt assembly comprises a first support, a driving motor, a roller and an annular conveying belt. The first support is arranged on the frame and extends along the feeding direction of the upper layer negative pressure conveying belt assembly. The two ends of the first support are provided with the rollers. The annular conveying belt is arranged outside the first support. The driving motor is arranged on the first support and is used to drive the annular conveying belt. The inside of the first support is provided with a negative pressure cavity which is connected with a negative pressure source. The annular conveying belt is provided with suction holes which are connected with the negative pressure cavity and are used to adsorb the bottle caps.

6. The bottle cap inspection apparatus according to claim 5, wherein The frame is provided with a height adjusting structure corresponding to the upper layer negative pressure conveying belt assembly. The height adjusting structure is used to adjust the height of the upper layer negative pressure conveying belt assembly.

7. The bottle cap inspection apparatus according to claim 6, wherein The height adjusting structure comprises a second support, a movable connecting piece, a screw rod assembly and a driving piece. The second support is arranged on the frame. The movable connecting piece is movably connected with the second support and is connected with the first support. The screw rod assembly is arranged between the second support and the movable connecting piece. The driving piece is connected with the screw rod assembly and is used to drive the movable connecting piece to move up and down relative to the second support.

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