Screening equipment

Abstract

The utility model discloses a screening device which comprises a vibration disc, a screening device, a feeding device, a discharging device, a feeding device and a discharging device, and the vibration disc is provided with a hopper which is provided with a spiral channel from bottom to top; the screening channel is in butt joint with the spiral channel, the butt joint position of the spiral channel and the screening channel has an up-down fall, the screening channel comprises an inner wall, an outer wall and a bottom face, the outer wall is located on the outer side of the inner wall, and the bottom face is connected to the outer wall and the inner wall and inclines downwards from the inner wall to the outer wall; a first blanking opening, a second blanking opening and a third blanking opening are sequentially formed in the outer wall in the extending direction of the screening channel, the opening heights of the first blanking opening, the second blanking opening and the third blanking opening are sequentially increased, the first blanking opening is in butt joint with a backflow channel communicated with the hopper, the second blanking opening is in butt joint with a first defective product channel, and the third blanking opening is in butt joint with a second defective product channel. And the third blanking port is in butt joint with a good product channel. Compared with the prior art, all defective products can be automatically screened out through the screening device, the screening efficiency is effectively improved, and the screening accuracy is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sieving, and in particular to sieving equipment. Background Technology

[0002] With the widespread use of machining equipment, it can be used to produce various types of workpieces. To further improve production efficiency, manufacturers often use multiple machining machines to produce workpieces of the same specifications. Workpieces produced by different machining machines may have dimensional errors, which means that manufacturers must filter out defective products before shipping.

[0003] Especially for wrench sockets, if the length of the wrench socket is insufficient or excessive, the wrench socket will not be able to securely fit the nut, which will cause slippage when tightening the nut, and subsequently cause irreversible damage to the nut.

[0004] Currently, the screening of sleeve blanks generally uses a sampling inspection method. Specifically, a batch of sleeve blanks is grouped together, and a number of blanks are randomly selected for testing. If the sampling pass rate does not meet the standard, then each blank in the batch needs to be tested individually to filter out all defective products. However, this screening method inevitably has the potential for missed detections and is time-consuming and labor-intensive. Therefore, there is an urgent need to develop a general screening device to filter out all defective products. Utility Model Content

[0005] The present invention aims to provide a screening device that can automatically filter out all defective products.

[0006] The screening device according to a first aspect embodiment of the present invention includes:

[0007] A vibratory feeder having a hopper that vibrates in a vertical direction, the hopper having a spiral channel arranged from bottom to top;

[0008] A screening channel is connected to the spiral channel. The connection point between the spiral channel and the screening channel has a vertical drop. The screening channel includes an inner wall, an outer wall, and a bottom surface. The outer wall is located outside the inner wall. The bottom surface is connected to the outer wall and the inner wall. The bottom surface is inclined downward from the inner wall to the outer wall. The outer wall has a first discharge port, a second discharge port, and a third discharge port sequentially opened along the extension direction of the screening channel. The opening heights of the first discharge port, the second discharge port, and the third discharge port increase sequentially. The first discharge port is connected to a return channel connected to the hopper. The second discharge port is connected to a first defective product channel. The third discharge port is connected to a good product channel.

[0009] The screening device according to the embodiment of this utility model has at least the following beneficial effects: When it is necessary to screen workpieces, multiple workpieces are first placed into the hopper and the vibrating plate is started. The vibrating plate drives multiple workpieces to be discharged sequentially along the spiral channel. Since most of the workpieces are in a folded state during the discharge process, a vertical drop is set at the junction of the spiral channel and the screening channel. This allows the workpieces to change their state by falling during the conveying process from the spiral channel to the screening channel, so that the workpieces are in an upright state. The workpieces in the folded state are guided to the return channel when passing through the first discharge port, ensuring that... Subsequent workpieces remain in an upright state. When a workpiece is conveyed to the second discharge port, if its length is less than the standard length, it will be guided to the first defective product channel. When a workpiece is conveyed to the third discharge port, if its length meets the standard length, it will be guided to the good product channel. Finally, workpieces longer than the standard length continue to move along the screening channel. Compared with the prior art, this invention can automatically filter out all defective products through the screening equipment, effectively improving screening efficiency and significantly increasing screening accuracy.

[0010] According to some embodiments of this utility model, the end of the screening channel is connected to a second defective product channel. Workpieces longer than the standard length continue to move along the screening channel and are eventually guided to the second defective product channel.

[0011] According to some embodiments of the present invention, in order to facilitate overall handling, the screening device further includes a housing, the vibrating plate is installed in the housing, and the housing has a first outlet corresponding to the first defective product channel, a second outlet corresponding to the good product channel, and a third outlet corresponding to the second defective product channel.

[0012] According to some embodiments of this utility model, the box has a cover, and sound insulation cotton is installed on the inner side of the box to achieve the purpose of noise reduction.

[0013] According to some embodiments of the present invention, in order to adapt to workpieces of different sizes and specifications, the second discharge port is connected to a second adjusting lifting plate, which is used to limit the opening height of the second discharge port.

[0014] According to some embodiments of the present invention, in order to adapt to workpieces of different sizes and specifications, the third discharge port is connected to a third adjusting lifting plate, which is used to limit the opening height of the third discharge port.

[0015] According to some embodiments of the present invention, in order to adapt to workpieces of different sizes and specifications, the first material discharge port is connected to a first adjusting lifting plate, which is used to limit the opening height of the first material discharge port.

[0016] According to some embodiments of the present invention, specifically, the vibratory feeder is used for discharging and conveying cylindrical workpieces, wherein the length dimension of the cylindrical workpiece is greater than its outer diameter dimension.

[0017] According to some embodiments of this utility model, the width of the spiral channel and the screening channel are both 1 to 1.3 times the outer diameter of the cylindrical workpiece, so as to discharge and transport the cylindrical workpiece one by one.

[0018] According to some embodiments of this utility model, if workpieces are stacked vertically during material discharge and conveying, the workpieces may cross the inner wall of the screening channel and directly enter the screening channel. Therefore, the screening channel is connected between the first discharge port and the second discharge port with a height limiting unit extending to the spiral channel. The height limiting unit is used to knock down the stacked workpieces.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the screening device provided in an embodiment of the present utility model;

[0022] Figure 2 This is another three-dimensional structural schematic diagram of the screening device provided in this embodiment of the utility model;

[0023] Figure 3 yes Figure 1 The top view of the screening equipment shown;

[0024] Figure 4 This is a front view of the filtering channel provided in this embodiment of the utility model.

[0025] In the attached diagram: 100-box body, 200-vibrating plate, 300-screening channel, 110-hopper, 120-spiral channel, 310-inner wall, 320-outer wall, 330-bottom surface, 340-first discharge port, 341-recirculation channel, 350-second discharge port, 351-first defective product channel, 360-third discharge port, 361-good product channel, 370-second defective product channel, 352-second adjusting lifting plate, 362-third adjusting lifting plate, 400-height limit unit. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used to distinguish technical features, they are not to be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] like Figures 1 to 3 As shown, the screening device according to the first aspect of the present invention includes a housing 100, a vibrating plate 200 and a screening channel 300, wherein the housing 100 serves as a mounting container for the vibrating plate 200, the vibrating plate 200 is mounted in the housing 100 via a connector, and the bottom surface 330 of the housing 100 is also connected to rollers to facilitate the overall handling of the screening device.

[0031] The vibratory feeder 200 can utilize existing technology. A pulse electromagnet is installed below its hopper 110, causing the hopper 110 to vibrate vertically. An inclined spring plate drives the hopper 110 to oscillate around its vertical axis. Workpieces within the hopper 110 are propelled upwards along the spiral channel 120 by this vibration for sequential discharge. Driven by the vibratory feeder 200, the workpieces are sequentially conveyed from the spiral channel 120 to the screening channel 300, where defective and good products are separated.

[0032] In this embodiment, the workpiece being screened is a sleeve blank, which is cylindrical in shape with an outer diameter and an inner diameter, and the length of the sleeve blank is greater than its outer diameter. The sleeve blank is produced by cutting long pipes to a certain length using a pipe cutting machine; therefore, all sleeve blanks have the same outer diameter. The length of the sleeve blank is positively correlated with the cutting accuracy of the pipe cutting machine. Since different pipe cutting machines may have different cutting accuracies, it is necessary to screen the length of the sleeve blanks to select those that meet the standard length, while other sleeve blanks that do not meet the standard length are defined as defective products.

[0033] Furthermore, since the sleeve blanks are generally made of metal and weigh no less than 50 grams, multiple sleeve blanks vibrating under the vibration of the vibrating plate 200 will generate sharp and piercing noise due to mutual friction, with noise levels reaching over 120 dB. To protect the workers' hearing, the vibrating plate 200 needs to be installed inside the housing 100. The top surface of the housing 100 is equipped with an openable and closable cover (not shown in the attached diagram), and the inner surface of the housing 100 is equipped with sound-absorbing cotton (not shown in the attached diagram) to achieve noise reduction. In use, the worker opens the cover, then puts multiple sleeve blanks into the hopper 110, then closes the cover and starts the vibrating plate 200. The vibrating plate 200 operates inside the housing 100, and most of the noise it generates is isolated inside the housing 100, reducing the noise outside the housing 100 to below 80 dB.

[0034] like Figures 1 to 4 As shown, the screening channel 300 is connected to the end of the spiral channel 120. The sleeve blanks on the spiral channel 120 enter the screening channel 300 under the drive of the vibrating plate 200. The width of both the spiral channel 120 and the screening channel 300 is 1 to 1.3 times the outer diameter of the sleeve blank, so as to reserve a certain size margin for the conveying of the sleeve blanks and adapt to sleeve blanks with different outer diameters. It also avoids multiple sleeve blanks from crowding into the same conveying space, thereby meeting the purpose of conveying the material one by one.

[0035] Through practice, it was found that the sleeve blanks are mostly kept in a flat state during the discharge process, that is, the circumference of the sleeve blank is in contact with the bottom of the conveying channel. However, since the screening of sleeve blanks is based on length, it is necessary to discharge the sleeve blanks from a disordered state to an upright state. When the sleeve blanks are in an upright state, the end face of the sleeve blank is in contact with the bottom of the conveying channel.

[0036] Therefore, this utility model sets a vertical drop at the junction of the spiral channel 120 and the screening channel 300. The setting height of the spiral channel 120 is higher than that of the screening channel 300, so that the sleeve blank can change its state by falling during the conveying process from the spiral channel 120 to the screening channel 300, so as to make the sleeve blank stand up.

[0037] Specifically, the screening channel 300 includes an inner wall 310, an outer wall 320, and a bottom surface 330. The outer wall 320 is located outside the inner wall 310, and the bottom surface 330 is connected to the outer wall 320 and the inner wall 310. The bottom surface 330 is inclined downward from the inner wall 310 to the outer wall 320, so that the sleeve blank in the screening channel 300 is kept in contact with the outer wall 320 under the inclined guidance of the bottom surface 330.

[0038] According to the above configuration, in order to filter out the sleeve blanks in a collapsed state, the outer wall 320 is provided with a first discharge port 340. The opening height of the first discharge port 340 is greater than the outer diameter of the sleeve blank but significantly smaller than the length of the sleeve blank, and the first discharge port 340 is connected to a return channel 341 that connects to the hopper 110. When the sleeve blank passes through the first discharge port 340, if the sleeve blank is in a collapsed state, the sleeve blank will enter the return channel 341 from the first discharge port 340 under the inclined guidance of the bottom surface 330, and finally return to the hopper 110; when the sleeve blank passes through the first discharge port 340, if the sleeve blank is in an upright state, the sleeve blank can smoothly pass through the first discharge port 340 and move downstream of the screening channel 300, thereby filtering out the sleeve blanks in a collapsed state.

[0039] According to the above setup, in order to filter out unqualified sleeve blanks, the outer wall 320 has a second discharge port 350 downstream of the first discharge port 340. The opening height of the first discharge port 340 is slightly less than the minimum standard length of the sleeve blank, and the second discharge port 350 is connected to the first defective product channel 351. Since the standard length of the sleeve blank is not a fixed value, but actually a range including tolerance values, as long as the length of the sleeve blank is within this range, the sleeve blank is a qualified product. When the sleeve blank passes through the second discharge port 350, if the length of the sleeve blank is less than the standard length, then the sleeve blank will enter the first defective product channel 351 from the second discharge port 350 under the inclined guidance of the bottom surface 330, and finally fall into the first defective product collection frame; when the sleeve blank passes through the second discharge port 350, if the length of the sleeve blank is greater than or equal to the standard length, then the sleeve blank can pass through the second discharge port 350 smoothly and move downstream of the screening channel 300, thereby filtering out the sleeve blank with the shorter length.

[0040] According to the above setup, in order to screen out qualified sleeve blanks, the outer wall 320 has a third discharge port 360 downstream of the second discharge port 350. The opening height of the third discharge port 360 is equal to the maximum value of the standard length of the sleeve blank, and the third discharge port 360 is connected to the good product channel 361. When the sleeve blank passes through the third discharge port 360, if the length of the sleeve blank is not greater than the standard length, then the sleeve blank enters the good product channel 361 from the third discharge port 360 under the inclined guidance of the bottom surface 330, and finally falls into the good product collection frame; when the sleeve blank passes through the third discharge port 360, if the length of the sleeve blank is greater than the standard length, then the sleeve blank can smoothly pass through the third discharge port 360 and move downstream of the screening channel 300, thereby screening out qualified sleeve blanks.

[0041] According to the above setup, in order to filter out unqualified sleeve blanks, the end of the screening channel 300 is connected to a second defective product channel 370. If the length of the sleeve blank is greater than the standard length, then the sleeve blank can smoothly pass through the third discharge port 360 and move downstream of the screening channel 300, and finally fall from the second defective product channel 370 into the second defective product collection box.

[0042] In summary, the opening heights of the first discharge port 340, the second discharge port 350, and the third discharge port 360 increase sequentially. The first defective product collection frame is used to collect sleeve blanks that are too short, the good product collection frame is used to collect qualified sleeve blanks, and the second defective product collection frame is used to collect sleeve blanks that are too long. For sleeve blanks that are too short, since they cannot be machined into qualified sleeve blanks, their processing method is remelting; for sleeve blanks that are too long, since they can be machined into qualified sleeve blanks, their processing method is fine slitting.

[0043] It should be further explained that, since the vibratory feeder 200 is installed inside the housing 100, the housing 100 has a first outlet corresponding to the first defective product channel 351, a second outlet corresponding to the good product channel 361, and a third outlet corresponding to the second defective product channel 370. This allows all collection frames to be placed outside the housing 100 for easy replacement and observation. When the worker finds, or the sensor detects, that no sleeve blanks have fallen from the good product channel 361 into the good product collection frame, it means that the sleeve blanks in the vibratory feeder 200 have been screened. The operation of the vibratory feeder 200 is then paused manually or automatically. After this, the worker opens the cover and puts the next batch of sleeve blanks into the hopper 110. The vibratory feeder 200 is restarted after the cover is closed.

[0044] In some embodiments of this utility model, to accommodate sleeve blanks of different sizes, a second adjusting lifting plate 352 is connected to the second discharge port 350, and a third adjusting lifting plate 362 is connected to the third discharge port 360. The second adjusting lifting plate 352 is used to limit the opening height of the second discharge port 350, and the third adjusting lifting plate 362 is used to limit the opening height of the third discharge port 360. Taking the second adjusting lifting plate 352 as an example, it is connected to the second discharge port 350 through a slotted hole and bolts. When the standard length of the sleeve blank is increased to a larger size, it is necessary to increase the opening height of the second discharge port 350. To do this, the bolts on the second adjusting lifting plate 352 are loosened to allow the second adjusting lifting plate 352 to have the freedom to adjust up and down. Then, the opening height of the second discharge port 350 is adjusted using a measuring ruler as a reference, and the bolts are used to lock the relative position of the second adjusting lifting plate 352. When the standard length of the sleeve blank is reduced to a smaller size, it is necessary to lower the opening height of the second discharge port 350. To do this, loosen the bolts on the second adjusting lifting plate 352 to allow the second adjusting lifting plate 352 to have the freedom to adjust up and down. Then, use a measuring ruler as a reference to lower the opening height of the second discharge port 350, and use bolts to lock the relative position of the second adjusting lifting plate 352.

[0045] Similarly, to accommodate sleeve blanks of different sizes, the first discharge port 340 is connected to a first adjusting lifting plate (not shown in the attached figure). The first adjusting lifting plate is used to limit the opening height of the first discharge port 340. The adjustment method of the first adjusting lifting plate can refer to the adjustment method of the second adjusting lifting plate 352, and will not be repeated here. However, since the opening height of the first discharge port 340 is positively correlated with the outer diameter of the sleeve blank, and its opening height has a large dimensional margin with the length of the sleeve blank, in some other embodiments, it is only necessary to reasonably increase the opening height of the first discharge port 340 so that it is greater than the outer diameter of the sleeve blank but less than the length of the sleeve blank, so that sleeve blanks of different sizes can be accommodated without setting the first adjusting lifting plate.

[0046] In some embodiments of this utility model, if the sleeve blanks are stacked vertically during discharge conveying, the sleeve blanks may cross the inner wall 310 of the screening channel 300 and directly enter the screening channel 300. To address this, a height-limiting unit 400 extending to the spiral channel 120 is connected between the first discharge port 340 and the second discharge port 350 of the screening channel 300. The height of the height-limiting unit 400 is flush with the height of the inner wall 310. When the sleeve blanks are stacked on the spiral channel 120, once the stacked sleeve blanks pass the height-limiting unit 400, the sleeve blanks at the top of the stack will be knocked down to the next layer of the spiral channel 120 by the height-limiting unit 400, thereby preventing the sleeve blanks from crossing the inner wall 310 of the screening channel 300 and directly entering the screening channel 300 due to stacking.

[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. Screening apparatus, characterized in that The application relates to a vibrating disc (200) comprising: a hopper (110) arranged to vibrate in a vertical direction, the hopper (110) having a spiral channel (120) arranged from bottom to top; a screening channel (300) connected to the spiral channel (120), the connecting position of the spiral channel (120) and the screening channel (300) having a height difference between top and bottom, the screening channel (300) comprising an inner wall (310), an outer wall (320) arranged outside the inner wall (310), and a bottom surface (330) connected to the outer wall (320) and the inner wall (310), the bottom surface (330) being arranged to slope downward from the inner wall (310) to the outer wall (320), the outer wall (320) being sequentially provided with a first discharge opening (340), a second discharge opening (350) and a third discharge opening (360) along the extension direction of the screening channel (300), the opening heights of the first discharge opening (340), the second discharge opening (350) and the third discharge opening (360) being sequentially increased, the first discharge opening (340) being connected with a backflow channel (341) connected to the hopper (110), the second discharge opening (350) being connected with a first defective product channel (351), and the third discharge opening (360) being connected with a good product channel (361).

2. The screening apparatus of claim 1, wherein: The end of the screening channel (300) is connected with a second defective product channel (370).

3. The screening apparatus of claim 2, wherein: The vibrating disc (200) is further arranged in a box (100), the box (100) being provided with a first outlet corresponding to the first defective product channel (351), a second outlet corresponding to the good product channel (361), and a third outlet corresponding to the second defective product channel (370).

4. The screening apparatus of claim 3, wherein: The box (100) is provided with a cover, and the inner side of the box (100) is provided with soundproof cotton.

5. The screening apparatus of claim 1, wherein: The second discharge opening (350) is connected with a second adjusting lifting plate (352) for limiting the opening height of the second discharge opening (350).

6. The screening apparatus of claim 5, wherein: The third discharge opening (360) is connected with a third adjusting lifting plate (362) for limiting the opening height of the third discharge opening (360).

7. The screening apparatus of claim 1, wherein: The first discharge opening (340) is connected with a first adjusting lifting plate for limiting the opening height of the first discharge opening (340).

8. The screening apparatus of claim 1, wherein: The vibrating disc (200) is used for conveying cylindrical workpieces, and the length of the cylindrical workpieces is greater than the outer diameter of the cylindrical workpieces.

9. The screening apparatus of claim 8, wherein: The widths of the spiral channel (120) and the screening channel (300) are 1 to 1.3 times the outer diameter of the cylindrical workpieces.

10. The screening apparatus of claim 1, wherein: The screening channel (300) is connected with a height limiting unit (400) extending to the spiral channel (120) between the first discharge opening (340) and the second discharge opening (350).

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