Automatic cleaning line for rivet nuts
By setting up staggered blocking rings and movable plate structures inside the rotating cylinder, combined with an inclined cylinder and high-pressure nozzles, the problems of insufficient and uneven cleaning time for rivet nuts are solved, achieving comprehensive cleaning results and stable equipment operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 宁波锐展五金制品有限公司
- Filing Date
- 2026-04-22
- Publication Date
- 2026-06-05
AI Technical Summary
In existing rivet nut cleaning devices, insufficient or uneven cleaning time leads to poor cleaning results, especially when the stroke is fixed, it is difficult to ensure that all rivet nuts are completely cleaned.
The rotating drum employs multiple sets of blocking structures and their interlaced blocking rings, along with a sliding movable plate and a return spring, to automatically adjust the material passage gap. Combined with the inclined drum and high-pressure fan-shaped nozzles, it achieves graded blocking and flipping, ensuring uniform cleaning and efficiency.
The graded blocking and flipping structure significantly extends the cleaning time of rivet nuts, ensuring that each nut is thoroughly cleaned, avoiding material blockage, and improving the uniformity and stability of cleaning.
Smart Images
Figure CN122142011A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of nut cleaning equipment, specifically an automatic cleaning line for rivet nuts. Background Technology
[0002] Rivet nuts, also known as rivet nuts or rivet caps, are fastening accessories used for thin components such as thin plates and pipes. They can be riveted and installed from one side without having to operate from the back of the workpiece. They can effectively solve the problems of inconvenient welding and easy deformation of thin parts caused by traditional nuts. They are securely installed and quick to install, and are widely used in sheet metal, chassis, furniture, automobiles and various equipment assembly scenarios.
[0003] In the prior art, the cleaning device for rivet nuts usually consists of a machine body, a cleaning tank, a spray system, and a material guiding component. The spray system usually uses high-pressure water flow to spray and rinse the rivet nuts in the cleaning chamber to remove dirt from the surface of the rivet nuts. In the current common cleaning devices, the cleaning time of rivet nuts is usually determined by the straight-line distance from the inlet to the outlet. However, the time required for the rivet nuts to pass over this distance may not necessarily guarantee that all rivet nuts are completely cleaned. Summary of the Invention
[0004] The purpose of this invention is to provide an automatic cleaning line for rivet nuts to solve the problems mentioned in the background art.
[0005] The objective of this invention can be achieved through the following technical solution: It includes a first feeding device and a cleaning device. One side of the cleaning device has a feeding structure, and the first feeding device is used to feed materials into the feeding structure. The other side of the cleaning device has a discharging structure. A second feeding device is located near the discharging structure, and a post-processing device is located at the discharge end of the second feeding device. The cleaning device contains a rotating drum and a driving structure for driving the rotating drum. The rotating drum is inclined to the ground, making the feeding structure higher than the discharging structure. The cleaning device also contains a cleaning pipeline that runs from one side of the rotating drum to the other side. The axis of the cleaning pipeline is parallel to the axis of the rotating drum. The cleaning pipeline is used to provide cleaning liquid to the rotating drum. The rotating drum also has several sets of blocking structures, which restrict the movement path of the material within the rotating drum.
[0006] In a preferred embodiment of the present invention, the blocking structure includes a plurality of blocking rings evenly spaced along the axis of the rotating cylinder. The blocking rings are fixed to the rotating cylinder, and the plurality of blocking rings are staggered in the inner circumferential direction of the rotating cylinder. Each blocking ring has a movable structure in the middle, and one end of the blocking ring near the feeding structure is also provided with a straight tube. The straight tube passes through the other blocking rings in the same blocking structure, and the maximum radial length of the straight tube is less than the radial length of the blocking ring. The movable structures in the same blocking structure are staggered.
[0007] In a preferred embodiment of the present invention, the distance between the blocking ring on the side of the feeding structure in one of the blocking structures and the blocking ring on the side of the feeding structure in the nearest blocking structure is greater than the spacing between two adjacent blocking rings in the same blocking structure.
[0008] In a preferred embodiment of the present invention, one end of the straight tube in the blocking structure corresponds to the position of the movable structure on the blocking ring in the nearest blocking structure.
[0009] In a preferred embodiment of the present invention, the blocking ring has a gap in the middle, the movable structure has a movable plate located in the corresponding gap, a guide structure is provided on the side of the movable plate away from the blocking ring, the movable plate is slidably disposed on the guide structure, and a reset structure is provided between the guide structure and the corresponding movable plate. The movable plate and the reset structure are configured such that when the reset structure is at its minimum deformation, one side surface of the movable plate is flush with one side surface of the corresponding blocking ring.
[0010] In a preferred embodiment of the present invention, the reset structure is a spring, one end of the reset structure is in contact with the movable plate, and the other end of the reset structure is in contact with the corresponding guide structure.
[0011] In a preferred embodiment of the present invention, the maximum circumferential angle of the blocking ring extending circumferentially within the rotating cylinder is less than 360 degrees.
[0012] In a preferred embodiment of the present invention, the movable plate is a frame structure with an adsorption side away from the blocking ring corresponding to the movable plate. The cleaning pipeline is located inside the blocking structure and is provided with magnetic structures matching the number of blocking structures. The movable plate and the corresponding magnetic structures are configured such that at least at one moment, the adsorption side on the movable plate is attracted by the magnetic structure, causing the movable plate to move in the corresponding direction.
[0013] In a preferred embodiment of the present invention, a plurality of cleaning heads are arranged along the axis of the cleaning pipeline, the liquid outlet of the cleaning heads faces downward, and both ends of the cleaning pipeline are respectively connected to the liquid supply system.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Through multiple sets of blocking structures and their interlaced blocking rings set along the axis inside the rotating drum, combined with sliding movable plates and reset springs, the material passage gap can be automatically adjusted according to the material accumulation amount to achieve graded blocking. When feeding in large batches, the material pushes open multiple movable plates in sequence, significantly extending the residence time in the rotating drum and ensuring that all rivet nuts are fully sprayed and cleaned. When feeding in small batches, the material can quickly pass through the blocking structure through the straight pipe to avoid ineffective residence, thus taking into account both cleaning adequacy and material passage efficiency. (2) The blocking ring set by the non-closed arc ring body can block the material at the bottom of the cylinder during the rotation process, and can also break up and flip the material brought up by the gap, eliminate the cleaning blind spot and improve the cleaning uniformity. (3) The magnetic suction structure set on the cleaning pipeline can periodically force open the movable plate to remove stuck materials and avoid material blockage. Combined with the layout of the inclined cylinder, the buffer zone between groups and the high-pressure fan-shaped nozzle, the material moves smoothly and the cleaning liquid covers evenly. This effectively solves the problem of insufficient or uneven cleaning time caused by the fixed stroke of traditional cleaning devices, and ensures the cleanliness and stability of rivet nuts under various working conditions. Attached Figure Description
[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of a portion of the cleaning device in this invention; Figure 3 This is a cross-sectional three-dimensional structural diagram of the rotating cylinder in this invention; Figure 4 This is a three-dimensional structural diagram of the cleaning pipeline and the blocking structure in this invention. Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 This is a three-dimensional structural diagram of the cleaning pipeline and the blocking structure in this invention, in which the movable structure of one of the blocking structures rotates to the corresponding magnetic attraction structure. Figure 7 For the present invention Figure 6 Enlarged view of the structure at point B.
[0017] In the diagram: 1. First feeding device; 2. Cleaning device; 21. Rotating drum; 22. Drive structure; 3. Feeding structure; 4. Discharging structure; 5. Second feeding device; 6. Post-processing device; 7. Cleaning pipeline; 71. Magnetic suction structure; 72. Cleaning head; 8. Blocking structure; 81. Blocking ring; 82. Movable structure; 821. Movable plate; 8211. Adsorption side; 822. Guide structure; 823. Reset structure; 83. Straight pipe. Detailed Implementation
[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] Please see Figures 1-7 As shown, an automatic cleaning line for rivet nuts includes a first feeding device 1 and a cleaning device 2. A feeding structure 3 is provided on one side of the cleaning device 2, and the first feeding device 1 is used to feed materials into the feeding structure 3. A discharge structure 4 is provided on the other side of the cleaning device 2. A second feeding device 5 is provided near the discharge structure 4, and a post-processing device 6 is provided at the unloading end of the second feeding device 5. A rotating drum 21 and a driving structure 22 for driving the rotating drum 21 are provided inside the cleaning device 2. The rotating drum 21 is inclined to the ground, making the feeding structure 3 higher than the discharge structure 4. A cleaning pipeline 7 is also provided inside the cleaning device 2, extending from one side of the rotating drum 21 to the other side. The axis of the cleaning pipeline 7 is parallel to the axis of the rotating drum 21. The cleaning pipeline 7 is used to provide cleaning liquid to the rotating drum 21. The rotating drum 21 is also provided with several sets of blocking structures 8, which are used to restrict the movement path of materials within the rotating drum 21.
[0020] In this embodiment, the cleaning device 2 has a closed cleaning chamber. The rotating cylinder 21 can be rotatably supported in the cleaning chamber by a bearing seat. The drive structure 22 can be a drive motor in conjunction with a reduction gear set. The output gear of the reduction gear set meshes with the gear ring on the outer wall of the rotating cylinder 21, thereby enabling the drive motor to drive the rotating cylinder 21 to rotate slowly and uniformly around its own axis through the reduction gear set. The tilt angle of the rotating drum 21 can be set to 3°-10°. This tilt angle can ensure that the rivet nut tends to move towards the discharge structure 4 under the action of gravity, and can also avoid the problem of excessive material movement speed and insufficient cleaning time caused by excessive tilt angle.
[0021] The first feeding device 1 can be a bucket elevator or an inclined feeding conveyor belt. Its discharge end is aligned with the feeding opening of the feeding structure 3, which can lift the rivet nuts to be cleaned in batches in the material frame to the corresponding height and then pour them into the feeding structure 3. The feeding structure 3 can be a cylindrical structure with both ends through it. Its discharge end extends into the feeding end of the rotating cylinder 21 to ensure that the rivet nuts to be cleaned can smoothly enter the inner cavity of the rotating cylinder 21.
[0022] The feeding end of the discharge structure 4 can be connected to the discharge end of the rotating drum 21. The inner side of its downward-sloping frame structure is provided with a smooth guide slide, so that the cleaned rivet nuts can slide smoothly down the guide slide to the feeding end of the second feeding device 5 under the action of gravity. The second feeding device 5 can also adopt a bucket lifting structure to lift the cleaned rivet nuts to the corresponding height and send them into the post-processing device 6. The post-processing device 6 can be equipped with a hot air drying mechanism, a vibrating screening mechanism or a rust prevention treatment mechanism according to production needs to complete the subsequent processes after the rivet nuts are cleaned, realize the fully automated operation of the rivet nuts from the loading to the finished product discharge, and improve production efficiency.
[0023] Optionally, the blocking structure 8 includes a plurality of blocking rings 81 arranged at equal intervals along the axis of the rotating cylinder 21. The blocking rings 81 are fixed on the rotating cylinder 21. The plurality of blocking rings 81 are staggered in the inner circumferential direction of the rotating cylinder 21. Each blocking ring 81 has a movable structure 82 in the middle. One end of the blocking ring 81 near the feeding structure 3 is also provided with a straight tube 83. The straight tube 83 passes through the other blocking rings 81 in the same blocking structure 8. The maximum radial length of the straight tube 83 is less than the radial length of the blocking ring 81. The movable structures 82 in the same blocking structure 8 are staggered.
[0024] In this embodiment, the number of blocking structures 8 can be set according to the axial length of the rotating cylinder 21. The number of blocking rings 81 in each group of blocking structures 8 can be set to 3. The 3 blocking rings 81 are arranged at equal intervals along the axial direction of the rotating cylinder 21, and each blocking ring 81 can be welded and fixed to the inner wall of the rotating cylinder 21 to ensure synchronous rotation with the rotating cylinder 21. The 3 blocking rings 81 in the same group can be staggered at 60° in the circumferential direction on the inner side of the rotating cylinder 21, that is, the deflection angle of two adjacent blocking rings 81 in the circumferential direction is 60°. This staggered arrangement can make the rivet nut contact the blocking rings 81 at different circumferential positions in sequence during the rotation of the rotating cylinder 21, avoiding the material from passing through quickly in a straight line and effectively extending the residence time of the material in a single group of blocking structures 8.
[0025] The three movable structures 82 within the same group of blocking structures 8 are arranged one-to-one with the three blocking rings 81, and the three movable structures 82 are also staggered at 60° along the circumference, matching the circumferential position of the corresponding blocking rings 81. The straight tube 83 can be a smooth straight tube, which is fixedly installed on the first blocking ring 81 closest to the feeding structure 3 in the same group of blocking structures 8. The axis of the straight tube 83 is parallel to the axis of the rotating cylinder 21. One end of the straight tube 83 extends to the feeding side end face of the first blocking ring 81, and the other end passes through the second and third blocking rings 81 in the same group in sequence, so that the internal channel of the straight tube 83 forms a fast material passage that can directly pass through all three blocking rings 81 in the group of blocking structures 8. The radial diameter of the straight tube 83 is smaller than the inner radial width of the blocking ring 81, ensuring that the setting of the straight tube 83 will not completely occupy the inner space of the blocking ring 81, and reserving sufficient accommodation space for the conventional blocking material passage of the rivet nut.
[0026] By staggering the circumferential arrangement of the blocking ring 81 and the movable structure 82 within the same group, the rivet nuts entering the blocking structure 8 can form a graded blocking effect, avoiding the concentrated stacking of materials; while the straight pipe 83 provides a fast material passage path for small batches of materials, which can adapt to different feeding conditions and take into account both the thoroughness of cleaning and the efficiency of material passage.
[0027] Optionally, the distance between the blocking ring 81 on the side of the feeding structure 3 in one of the blocking structures 8 and the blocking ring 81 on the side of the nearest blocking structure 8 on the side of the feeding structure 3 is greater than the spacing between two adjacent blocking rings 81 in the same blocking structure 8.
[0028] In this embodiment, the axial distance between two adjacent blocking rings 81 in the same blocking structure 8 is set as L1, and the axial distance between the blocking ring 81 closest to the feed structure 3 in the first group and the blocking ring 81 closest to the feed structure 3 in the second group of two adjacent blocking structures 8 is set as L2. In this embodiment, the value of L2 can be 3-5 times that of L1. The purpose of this distance setting is to form a buffer cleaning zone of sufficient length between two adjacent groups of blocking structures 8. After the rivet nut is discharged from the first group of blocking structures 8, it can be fully rotated within this buffer cleaning zone with the rotation of the rotating drum 21, and is fully sprayed and rinsed by the cleaning liquid sprayed from the cleaning pipeline 7, so as to avoid the material being continuously blocked by multiple groups of blocking rings 81 and causing local cleaning blind spots. At the same time, the larger inter-group distance can avoid the problem of material congestion between two adjacent groups of blocking structures 8, and ensure that the material moves more smoothly in the rotating drum 21. It can extend the material residence time through the blocking rings 81 in the group, and ensure the uniformity of cleaning through the buffer zone between the groups, further improving the stability of the cleaning effect.
[0029] Optionally, one end of the straight tube 83 in the blocking structure 8 corresponds to the position of the movable structure 82 on the blocking ring 81 in the nearest blocking structure 8.
[0030] In this embodiment, the discharge end of the straight tube 83 corresponds in the circumferential direction of the movable structure 82 on the blocking ring 81 closest to the feed structure 3 in the adjacent set of blocking structures 8. That is, when the rotating cylinder 21 rotates to the lowest position of the straight tube 83 inside the rotating cylinder 21, the movable structure 82 on the corresponding blocking ring 81 in the next set is also at the lowest position inside the rotating cylinder 21. The purpose of this position is to ensure that when a small batch of rivet nuts quickly pass through the first set of blocking structures 8 via the straight tube 83, they can fall into the next set. At the blocking station where the movable structure 82 of the blocking structure 8 cooperates with the blocking ring 81, the material is prevented from sliding quickly down the inner wall of the rotating drum 21 after being discharged from the straight pipe 83. This ensures that small batches of material can still be graded and blocked by the next set of blocking structures 8, ensuring that the residence time in the rotating drum 21 meets the basic cleaning requirements and preventing problems such as small batches of material passing through too quickly and insufficient cleaning. At the same time, this corresponding setting makes the movement path of the material more controllable, preventing the material from bouncing and piling up irregularly between adjacent sets of blocking structures 8.
[0031] Optionally, a gap is provided in the middle of the blocking ring 81, and the movable structure 82 has a movable plate 821 located in the corresponding gap. A guide structure 822 is provided on the side of the movable plate 821 away from the blocking ring 81. The movable plate 821 is slidably disposed on the guide structure 822. A reset structure 823 is provided between the guide structure 822 and the corresponding movable plate 821. The movable plate 821 and the reset structure 823 are configured such that when the reset structure 823 is at its minimum deformation, one side surface of the movable plate 821 is flush with one side surface of the corresponding blocking ring 81.
[0032] In this embodiment, the blocking ring 81 is an arc-shaped ring structure, with a through groove running through the center of the rotating cylinder 21. The contour of the through groove matches the outer contour of the movable plate 821, allowing the movable plate 821 to be embedded in the through groove and sealing the middle gap of the blocking ring 81. The guide structure 822 may include two parallel guide plates or guide rods. The extension direction of the guide plates or guide rods is parallel to the axis of the rotating cylinder 21. One end of the guide plate or guide rod is fixed to the inner wall of the rotating cylinder 21 by a mounting bracket. The side of the movable plate 821 may be provided with a structure that slides with the guide plate or guide rod, so that the movable plate 821 can slide smoothly along the extension direction of the guide plate or guide rod without circumferential deflection, ensuring the fitting accuracy between the movable plate 821 and the blocking ring 81.
[0033] The reset structure 823 can be set on the guide plate or guide rod, with one end fixedly abutting against the end face of the movable plate 821 and the other end fixedly abutting against the end of the guide plate or guide rod. When the reset structure 823 is at its minimum deformation due to natural elongation, the movable plate 821 is completely embedded in the middle gap of the blocking ring 81, and the surface of the movable plate 821 facing the feeding structure 3 is completely flush with the surface of the blocking ring 81 facing the feeding structure 3, so that the blocking ring 81 and the movable plate 821 together form a complete arc-shaped blocking surface without protrusion or depression, preventing the rivet nut from getting stuck in the mating gap between the movable plate 821 and the blocking ring 81, and preventing a small batch of nuts from directly pressing open the movable plate 821.
[0034] When the rivet nuts inside the rotating drum 21 accumulate at the blocking ring 81, the component of the material's gravity along the axial direction of the rotating drum 21 will press the movable plate 821, causing the movable plate 821 to slide along the guide structure 822 towards the discharge structure 4. At the same time, it compresses the reset structure 823. At this time, a material passage gap is formed between the movable plate 821 and the blocking ring 81, allowing the accumulated material to move to the next level blocking ring 81 through this gap. When the amount of material accumulation decreases and the pressure on the movable plate 821 is less than the elastic force of the reset structure 823, the reset structure 823 pushes the movable plate 821 to reset, re-sealing the gap of the blocking ring 81 and restoring the blocking function. This structure can automatically adjust the size of the material passage gap according to the amount of material accumulation, realizing graded material passage. The larger the amount of material accumulation, the larger the opening of the material passage gap. At the same time, the material needs to pass through the graded blocking of multiple blocking rings 81 in sequence, which greatly extends the residence time of the material in the rotating drum 21, ensuring that all rivet nuts can be thoroughly cleaned when feeding in large quantities.
[0035] Optionally, the reset structure 823 is a spring, with one end of the reset structure 823 in contact with the movable plate 821 and the other end of the reset structure 823 in contact with the corresponding guide structure 822.
[0036] In this embodiment, the reset structure 823 can specifically adopt a cylindrical compression spring. The two ends of the cylindrical compression spring can be provided with flat support rings to ensure that it can make surface contact with the mounting bracket of the movable plate 821 and the guide structure 822, so that the force is more uniform and the problem of spring wear and failure during long-term reciprocating compression is avoided. At the same time, a cylindrical compression spring with a corresponding elastic coefficient can be selected according to the single weight of the rivet nut and the conventional accumulation amount, so that the opening threshold of the spring can be adapted to the actual production needs: when the number of rivet nuts accumulated at a single set of blocking rings 81 reaches the set threshold, the extrusion force of the material can overcome the spring force to push the movable plate 821 to move and open the gap. When the amount of material is lower than the threshold, the spring can stably maintain the blocking state of the movable plate 821, ensuring that small batches of material can be effectively blocked and ensuring cleaning time.
[0037] Optionally, the maximum circumferential angle of the blocking ring 81 extending circumferentially within the rotating cylinder 21 is less than 360 degrees.
[0038] In this embodiment, the blocking ring 81 is a non-closed arc-shaped ring. The circumferential angle extending circumferentially within the rotating cylinder 21 can range from 180° to 270°. That is, the blocking ring 81 has a 90°-180° notch area in the circumferential direction. The purpose is that when the rotating cylinder 21 drives the blocking ring 81 to rotate, the arc-shaped body of the blocking ring 81 can effectively block the rivet nut falling to the bottom of the cylinder when it rotates to the lower half of the inner cavity of the rotating cylinder 21, thus prolonging the material residence time. When the blocking ring 81 rotates to the upper half of the inner cavity of the rotating cylinder 21, ... The circumferential notch area allows a small number of rivet nuts to fall off under gravity, creating a flipping and scattering effect as the rotating drum 21 rotates. This prevents the rivet nuts from stacking and sticking together, ensuring that all surfaces of the rivet nuts are exposed to the spray range of the cleaning liquid, eliminating blind spots and significantly improving the uniformity and cleanliness of the cleaning. At the same time, the non-closed arc-shaped ring design prevents the blocking ring 81 from forming a closed circle that would prevent materials from passing through, ensuring smooth material flow and preventing material jamming or blockage.
[0039] Optionally, the movable plate 821 is a frame structure with an adsorption side 8211. The adsorption side 8211 is away from the blocking ring 81 corresponding to the movable plate 821. The cleaning pipeline 7 is located inside the blocking structure 8. The cleaning pipeline 7 is provided with magnetic attraction structures 71 matching the number of blocking structures 8. The movable plate 821 and the corresponding magnetic attraction structures 71 are configured such that at least at one moment, the adsorption side 8211 on the movable plate 821 is attracted by the magnetic attraction structure 71, causing the movable plate 821 to move in the corresponding direction.
[0040] Furthermore, a closed baffle can be provided on the side of the movable plate 821 away from the rotating cylinder 21 to hide the reset structure 823 and prevent the rivet nut from falling into the space.
[0041] In this embodiment, the adsorption side 8211 can be an iron plate fixedly installed on the end face of the movable plate 821 frame facing the discharge structure 4. The surface of the iron plate is flat and is fixedly connected to the frame of the movable plate 821 by bolts or integrally formed. The cleaning pipeline 7 is a rigid straight pipe fixedly installed, with both ends fixed to the chamber of the cleaning device 2 and not rotating with the rotating drum 21. The magnetic attraction structure 71 can be an electromagnet or a permanent magnet. In this embodiment, a permanent magnet is used. The magnetic attraction structure 71 is fixedly installed on the outer wall of the cleaning pipeline 7, and each set of blocking structures 8 is provided with a corresponding magnetic attraction structure 71. The magnetic attraction structure 71 can be a ring structure and corresponds to the rotation path of the movable plate 821 in the corresponding blocking structure 8.
[0042] When the rotating cylinder 21 drives the movable plate 821 to rotate to the corresponding position of the magnetic attraction structure 71, the distance between the adsorption side 8211 of the movable plate 821 and the magnetic attraction structure 71 reaches the threshold of the magnetic attraction force. The magnetic attraction structure 71 generates a magnetic attraction force on the adsorption side 8211. This magnetic attraction force overcomes the elastic force of the reset structure 823 and pulls the movable plate 821 along the guide structure 822 towards the direction closer to the magnetic attraction structure 71 (i.e., the side of the discharge structure 4). Figure 7 As shown, a stable material passage gap is formed between the movable plate 821 and the blocking ring 81. At this time, the rivet nut stuck between the movable plate 821 and the blocking ring 81 can fall smoothly and flow with the material to the next station, effectively solving the problem of the rivet nut getting stuck at the blocking station and avoiding material blockage failure of the equipment. When the rotating drum 21 continues to rotate, it drives the movable plate 821 away from the corresponding position of the magnetic attraction structure 71. The magnetic attraction gradually decreases until it disappears. The reset structure 823 pushes the movable plate 821 to automatically reset, restoring the blocking state of the gap of the blocking ring 81 and continuing to perform the material blocking function. This structure realizes the forced opening of the movable plate 821 through magnetic attraction, which can effectively clear the stuck material and ensure the stability and continuity of equipment operation. At the same time, no additional power mechanism is required, the structure is simple and the operation is reliable.
[0043] Optionally, a plurality of cleaning heads 72 are provided along the axis of the cleaning pipeline 7, with the liquid outlet of the cleaning heads 72 facing downwards, and both ends of the cleaning pipeline 7 are connected to the liquid supply system.
[0044] In this embodiment, the cleaning pipeline 7 can be a hollow rigid pipe with an internal cavity for cleaning fluid. Multiple cleaning heads 72 are arranged at equal intervals along the axial direction of the cleaning pipeline 7, with at least two cleaning heads 72 between every two adjacent blocking structures 8. One cleaning head 72 is also provided at the corresponding position of each group of blocking structures 8, ensuring that all workstations within the rotating cylinder 21 are fully covered by the cleaning fluid. The cleaning heads 72 can be high-pressure fan-shaped nozzles, with their outlets facing the bottom of the inner cavity of the rotating cylinder 21, i.e., the main area where rivet nuts accumulate and move. The spray angle of the fan-shaped nozzles can be set to 60°-120°, forming a large-area high-pressure water curtain to powerfully flush the surface of the rivet nuts, effectively removing oil, iron filings, and other dirt. The cleaning pipeline 7 has two... All ends are connected to an external liquid supply system via rotary joints. The liquid supply system may include a storage tank, a high-pressure water pump, a filtration unit, and a heating unit. The high-pressure water pump pressurizes the cleaning fluid in the storage tank and sends it into the cleaning pipeline 7, where it is sprayed out under high pressure through the cleaning head 72. The filtration unit filters the circulating cleaning fluid to remove impurities and ensure the cleanliness of the cleaning fluid. The heating unit heats the cleaning fluid to a set temperature according to the cleaning requirements, improving the removal effect of oil stains. The cleaning pipeline 7 can be supplied with liquid at both ends, which can ensure that the pressure of the cleaning fluid at each position in the cleaning pipeline 7 is uniform and consistent, avoiding problems such as insufficient pressure and poor spraying effect at the far cleaning head 72. This ensures that all cleaning heads 72 can stably output high-pressure cleaning fluid, ensuring uniform and stable cleaning effect throughout the entire line.
[0045] It is understood that the cleaning device 2 is equipped with a drainage system, which is used to discharge the waste liquid after cleaning from the cleaning device 2. The drainage system is existing technology and may include a collection tank at the bottom of the cleaning chamber of the cleaning device 2. The collection tank extends along the axis of the rotating cylinder 21 and has an inclined guiding slope at the bottom. A drain outlet is provided at the lowest point of the guiding slope and is connected to an external waste liquid treatment system through a drainage pipe. A filter grid is provided at the top opening of the collection tank. The filter grid can intercept large iron filings and impurities carried in the cleaning waste liquid and prevent impurities from entering the drainage pipe and causing blockage.
[0046] When using this invention, the specific steps may include the following: S1. Place the rivet nuts to be cleaned into the hopper of the first feeding device 1. After the first feeding device 1 lifts the rivet nuts to a set height, it tilts them into the feeding structure 3. The rivet nuts are guided by the feeding structure 3 and smoothly enter the inner cavity of the rotating cylinder 21 in the cleaning device 2.
[0047] S2. The drive structure 22 drives the rotating drum 21 to rotate slowly and uniformly around its own axis. At the same time, the liquid supply system supplies high-pressure cleaning fluid into the cleaning pipeline 7. The cleaning fluid is sprayed downwards at high pressure through the cleaning head 72 on the cleaning pipeline 7 to spray and rinse the rivet nuts in the rotating drum 21. Under the tilting setting of the rotating drum 21 and the action of gravity, the rivet nuts move towards the discharge structure 4, passing through multiple sets of blocking structures 8 in sequence. When a large number of rivet nuts enter the rotating cylinder 21, the material accumulates at the first blocking ring 81 of the first group of blocking structures 8. The axial component of the material's gravity presses against the movable plate 821, causing the movable plate 821 to compress the reset structure 823 and move along the guide structure 822, opening the gap of the blocking ring 81. Some material passes through the gap and enters the second blocking ring 81 in the same group. If the amount of material is still large, it will continue to press against the movable plate 821 of the second blocking ring 81, allowing some material to enter the third blocking ring 81. Through the graded blocking of the three blocking rings 81 in the same group, the residence time of the material in the group of blocking structures 8 is greatly extended. At the same time, the rotation of the rotating cylinder 21 causes the material to continuously tumble, so that all surfaces of the material can be fully rinsed by the cleaning liquid sprayed from the cleaning head 72, ensuring thorough cleaning. The material passes through the graded blocking of multiple groups of blocking structures 8 and the spray cleaning between the buffer zones in sequence, ensuring that all rivet nuts can meet the set cleaning cleanliness requirements. When the number of rivet nuts entering the rotating cylinder 21 is small, the amount of material accumulating at the blocking ring 81 is insufficient to push the movable plate 821 to move and open the gap. As the rotating cylinder 21 rotates, the material eventually enters the straight pipe 83 from the circumferential gap of the blocking ring 81. Through the straight pipe 83, it quickly passes through all the blocking rings 81 of the group of blocking structures 8 and directly enters the next group of blocking structures 8, greatly shortening the ineffective residence time of the material in the rotating cylinder 21. When the rotating drum 21 drives the movable plate 821 to rotate to the corresponding position of the magnetic suction structure 71 on the cleaning pipeline 7, the magnetic suction structure 71 generates a magnetic attraction force on the adsorption side 8211 of the movable plate 821, pulling the movable plate 821 to move and open the gap, so that the material stuck between the movable plate 821 and the blocking ring 81 can fall smoothly. S3. The cleaned rivet nuts are discharged from the discharge end of the rotating drum 21 and fall into the discharge structure 4. Through the inclined guide slide of the discharge structure 4, they slide down to the feed end of the second feeding device 5 under the action of gravity. The second feeding device 5 lifts the cleaned rivet nuts to a set height and then sends them into the post-processing device 6. According to production needs, subsequent processes such as drying, screening, and rust prevention are completed to finally obtain clean finished rivet nuts.
[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to these specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims
1. An automatic cleaning line for rivet nuts, characterized in that, The device includes a first feeding device (1) and a cleaning device (2). The cleaning device (2) has a feeding structure (3) on one side, and the first feeding device (1) is used to feed materials into the feeding structure (3). The cleaning device (2) has a discharge structure (4) on the other side, and a second feeding device (5) is located near the discharge structure (4). A post-processing device (6) is located at the discharge end of the second feeding device (5). The cleaning device (2) contains a rotating drum (21) and a driving structure (22) for driving the rotating drum (21). The cylinder (21) is inclined to the ground, so that the feeding structure (3) is higher than the discharging structure (4). The cleaning device (2) is also provided with a cleaning pipeline (7). The cleaning pipeline (7) runs from one side to the other side inside the rotating cylinder (21). The axis of the cleaning pipeline (7) is parallel to the axis of the rotating cylinder (21). The cleaning pipeline (7) is used to provide cleaning liquid to the rotating cylinder (21). The rotating cylinder (21) is also provided with several sets of blocking structures (8). The blocking structures (8) are used to restrict the movement path of the material inside the rotating cylinder (21).
2. The automatic cleaning line for rivet nuts according to claim 1, characterized in that, The blocking structure (8) includes multiple blocking rings (81) arranged at equal intervals along the axis of the rotating cylinder (21). The blocking rings (81) are fixed on the rotating cylinder (21). The multiple blocking rings (81) are staggered in the inner circumferential direction of the rotating cylinder (21). Each blocking ring (81) has a movable structure (82) in the middle. One end of the blocking ring (81) near the feeding structure (3) is also provided with a straight tube (83). The straight tube (83) passes through the other blocking rings (81) in the same blocking structure (8). The maximum radial length of the straight tube (83) is less than the radial length of the blocking ring (81). The movable structures (82) in the same blocking structure (8) are staggered.
3. An automatic cleaning line for rivet nuts according to claim 2, characterized in that, The distance between the blocking ring (81) on the side of the feeding structure (3) in one of the blocking structures (8) and the blocking ring (81) on the side of the feeding structure (3) in the nearest blocking structure (8) is greater than the distance between two adjacent blocking rings (81) in the same blocking structure (8).
4. An automatic cleaning line for rivet nuts according to claim 2, characterized in that, One end of the straight tube (83) in the blocking structure (8) corresponds to the position of the movable structure (82) on the blocking ring (81) in the nearest blocking structure (8).
5. An automatic cleaning line for rivet nuts according to claim 2, characterized in that, The blocking ring (81) has a gap in the middle. The movable structure (82) has a movable plate (821). The movable plate (821) is located in the corresponding gap. A guide structure (822) is provided on the side of the movable plate (821) away from the blocking ring (81). The movable plate (821) is slidably disposed on the guide structure (822). A reset structure (823) is provided between the guide structure (822) and the corresponding movable plate (821). The movable plate (821) and the reset structure (823) are configured such that when the reset structure (823) is at its minimum deformation, one side surface of the movable plate (821) is flush with one side surface of the corresponding blocking ring (81).
6. An automatic cleaning line for rivet nuts according to claim 5, characterized in that, The reset structure (823) is a spring. One end of the reset structure (823) is in contact with the movable plate (821), and the other end of the reset structure (823) is in contact with the corresponding guide structure (822).
7. An automatic cleaning line for rivet nuts according to claim 2, characterized in that, The maximum circumferential angle of the blocking ring (81) extending circumferentially within the rotating cylinder (21) is less than 360 degrees.
8. An automatic cleaning line for rivet nuts according to claim 5, characterized in that, The movable plate (821) is a frame structure. The movable plate (821) has an adsorption side (8211). The adsorption side (8211) is away from the blocking ring (81) corresponding to the movable plate (821). The cleaning pipeline (7) is located inside the blocking structure (8). The cleaning pipeline (7) is provided with a number of magnetic structures (71) matching the number of blocking structures (8). The movable plate (821) and the corresponding magnetic structures (71) are configured such that: at least at one moment, the adsorption side (8211) on the movable plate (821) is attracted by the magnetic structure (71), causing the movable plate (821) to move in the corresponding direction.
9. An automatic cleaning line for rivet nuts according to claim 1, characterized in that, The cleaning pipeline (7) is provided with a plurality of cleaning heads (72) along its axis. The liquid outlet of the cleaning head (72) faces downward. Both ends of the cleaning pipeline (7) are connected to the liquid supply system.