A process for preparing non-destructive grids from waste tires

Abstract

The present invention provides a process for preparing a non-destructive grille from waste tires, which relates to the technical field of solid waste treatment. Aiming at the problem that the existing grilles produced using waste tires have insufficient strength at the connection positions of intersections, the waste tires are cut to obtain tire strips, which are arranged in a manner where warps and wefts intersect, and fasteners are provided at the intersections for fixation. The fasteners are locked in position by ultrasonic welding, and connecting pieces are used to compensate for dimensional changes during the welding process, thereby ensuring the fit and locking ability of the fasteners to the intersections of the tire strips, and thus ensuring the strength and performance of the formed grille.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste treatment, and in particular to a process for preparing non-destructive grids from waste tires. Background Art

[0002] Waste tires are hazardous solid waste, and improper disposal can endanger the ecological environment. Waste tires can be recycled, ground into powder, and added to building materials as an admixture, effectively improving the material's energy absorption and shock absorption properties. Alternatively, they can be cut into strips and overlapped to create grids, which can be used in foundations as reinforcement.

[0003] Regarding the process of preparing tires into grids after cutting, a Chinese patent (publication number: CN116837717A) discloses a scrap tire grid reinforced ribbed bridge abutment embankment structure and construction method. This method uses scrap tire strips to apply preload, fully utilizing the elastic retraction force of the tire strips to offset the increased tensile deformation of the grid caused by differential settlement during operation. Other prior art applications of tire strip grids in construction also provide other applications. Traditional geogrids are processed using a dedicated welding system. The intersections of the vertical and horizontal strips are welded and fixed. As the strips are continuously transported, the intersections are welded sequentially to form the finished geogrid. However, tire strip grids are not made of metal. Using a puncture method to fix the intersections can damage the strips and create weak spots, making them prone to breakage during subsequent construction and service. Using fasteners to fix the intersections, the tire strips are made of an elastic material, and when fastening and installing the fasteners, insufficient compression force can easily lead to insufficient connection strength or excessive compression can damage the strips, affecting the performance of the grid formed by the tire strips. Summary of the Invention

[0004] The purpose of the present invention is to address the defects of the existing technology and provide a process for preparing non-destructive grids from waste tires. The waste tires are cut to obtain tire strips, which are arranged in a manner that the warp and weft threads intersect, and fasteners are set at the intersections for fixation. The fasteners are locked in position by ultrasonic welding, and connecting pieces are used to compensate for dimensional changes during the welding process, thereby ensuring the fit and locking ability of the fasteners to the intersection of the tire strips and ensuring the strength and performance of the formed grid.

[0005] In order to solve the above problems, the following solutions are adopted:

[0006] A process for preparing non-destructive grids from waste tires, comprising:

[0007] Cutting waste tires to obtain tire strips, which are divided into transverse strips and longitudinal strips according to their distribution direction;

[0008] A plurality of longitudinal strips are distributed as warps, a plurality of transverse strips are distributed as wefts, and the transverse strips and the longitudinal strips are cross-crossed;

[0009] A fastener is installed at the intersection of the horizontal strip and the longitudinal strip. The two parts of the fastener are fastened together from the top and bottom respectively. A connecting piece is provided at the fastening position. Ultrasonic welding is applied to the fastener to connect the two parts of the fastener and fix them at the intersection, thereby fixing the positions of the horizontal strip and the longitudinal strip.

[0010] Furthermore, when cutting the waste tire, the waste tire is cut in a rotary cutting manner so that the same waste tire is cut into a whole tire strip.

[0011] Furthermore, before cutting the waste tires to obtain tire strips, the waste tires are subjected to a shaving process, and the cutting angle is controlled during cutting to control the width of the obtained tire strips.

[0012] Furthermore, the fastener includes an upper buckle and a lower buckle, the upper buckle includes an upper plate and an upper claw located at the corner position of the upper plate, the lower buckle includes a lower plate and a lower claw located at the corner position of the lower plate, the upper plate fits the top surface of the intersection position, and the lower plate fits the bottom surface of the intersection position, the upper claw portion and the lower claw portion are connected and are located on the side of the intersection position.

[0013] Furthermore, the upper plate and the lower plate are both cross-shaped plates, and the four corner positions of the upper plate are connected to the lower claws of the lower buckle through the upper claws respectively, and the connecting piece is located at the docking position between the upper claw and the lower claw.

[0014] Furthermore, one end of the longitudinal strip is wound on a conveying roller, and the other end is wound on a winding roller. Ultrasonic welding is applied to the fastener between the conveying roller and the winding roller, and the transverse strip and the longitudinal strip after the fastener is installed are wound onto the winding roller.

[0015] Furthermore, ultrasonic welding is applied by a welding device, which includes a guide rail, an adjusting robot arm and a welding gun. Multiple welding guns are distributed at intervals corresponding to the cross positions on the transverse strip. The adjusting robot arm is installed on the guide rail, and the adjusting robot arm slides along the guide rail to change its relative position with the transverse strip. A clamp is provided at the end of the adjusting robot arm to clamp and drive the transverse strip.

[0016] Furthermore, the clamps of the adjustment robot arm clamp the two ends of the transverse strip respectively, driving the transverse strip to move so as to change the spacing between adjacent transverse strips.

[0017] Furthermore, the spacing between adjacent longitudinal strips on the conveying roller is adjusted to adjust the mesh size of the formed grid.

[0018] Furthermore, the fastener fits the side surfaces of the transverse strips and the longitudinal strips at the intersection, and the longitudinal strips fit the transverse strips at the intersection.

[0019] Compared with the prior art, the present invention has the following advantages and positive effects:

[0020] (1) In order to solve the problem of insufficient strength of the intersection connection position of the grid produced by using waste tires, tire strips are cut from waste tires and arranged in a way that the warp and weft are crossed. Fasteners are set at the intersection to fix them. The fasteners are locked in position by ultrasonic welding, and the connecting pieces are used to compensate for the dimensional changes during the welding process, ensuring the fit and locking ability of the fasteners to the intersection position of the tire strips, thereby ensuring the strength and performance of the formed grid.

[0021] (2) Using waste tires to cut and process tire strips to prepare grids that can be used for construction can effectively reduce pollution in the waste tire recycling process, reduce resource waste, and achieve the goal of reducing costs and increasing efficiency.

[0022] (3) The existing tire strip overlap method causes mechanical damage to the strip itself, destroying its pull-out resistance. The present invention uses ultrasonic technology to weld fasteners, and the fasteners are pressed at the intersection of the longitudinal strip and the transverse strip to achieve connection. The welding speed is fast, which can achieve no damage to the strip itself while improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] Figure 1 Schematic diagram of the process for preparing non-destructive grids from waste tires in Example 1 of the present invention.

[0025] Figure 2 Schematic diagram of the grid prepared in Example 1 of the present invention.

[0026] Figure 3 Schematic diagram of adjusting the robotic arm to clamp the transverse strip in Example 1 of the present invention.

[0027] Figure 4 This is a schematic diagram of installing fasteners at cross positions in Example 1 of the present invention.

[0028] In the figure, 1. tire cutting device, 1-1. cutter disc, 1-2. roller, 1-3. waste tire; 2. welding device, 2-1. winding roller, 2-2. conveying roller, 2-3. guide rail, 2-4. adjustment robot arm, 2-5. grid, 2-6. welding gun, 3. transverse strip, 4. longitudinal strip, 5. fastener, 6. upper buckle, 7. lower buckle, 8. upper claw, 9. lower claw, 10. connecting piece, 11. cross plate. DETAILED DESCRIPTION

[0029] Example 1

[0030] In a typical embodiment of the present invention, Figure 1-Figure 4 As shown, a process for preparing non-destructive grids from waste tires is provided.

[0031] Tire strips are made from scrap tires 1-3, which are arranged in a crosswise pattern and secured with fasteners 5 at the intersections to form grilles 2-5 for construction. However, installing fasteners 5 at the intersections of the tire strips can easily damage the tire strips, resulting in weak spots in the formed grilles 2-5. Furthermore, the fasteners 5 have poor adhesion to the tire strips, resulting in insufficient connection strength at these weak spots. Based on this, the present embodiment provides a process for preparing non-destructive grilles from scrap tires. The tire strips are arranged in a crosswise pattern of warp and weft threads, fasteners 5 are installed at the intersections for securing them, and the fasteners 5 are locked in place using ultrasonic welding. Connecting pieces 10 compensate for dimensional changes during welding, ensuring the fasteners 5 adhere to and lock the tire strips at their intersections.

[0032] like Figure 1 As shown in the figure, the process of preparing non-destructive grids from waste tires includes:

[0033] Cutting the waste tires 1-3 to obtain tire strips, which are divided into transverse strips 3 and longitudinal strips 4 according to distribution directions;

[0034] A plurality of longitudinal strips 4 are distributed as warps, and a plurality of transverse strips 3 are distributed as wefts, and the transverse strips 3 and the longitudinal strips 4 are cross-shaped.

[0035] The fastener 5 is installed at the intersection of the transverse strip 3 and the longitudinal strip 4. The two parts of the fastener 5 are fastened together from the top and bottom respectively. A connecting piece 10 is provided at the fastening position. Ultrasonic welding is applied to the fastener 5 to connect the two parts of the fastener 5 and fix them at the intersection, thereby fixing the positions of the transverse strip 3 and the longitudinal strip 4.

[0036] In this embodiment, a method for cutting waste tires 1-3 into tire strips is also provided. The collected waste tires 1-3 are cut off with a upper cutting machine to remove excess parts, leaving only the middle part of the waste tires 1-3 for preparing strips.

[0037] like Figure 1As shown, the tire cutting device 1 is used to cut the waste tires 1-3. The processed waste tires 1-3 are placed on the tire cutting device 1. The blade 1-1 is set at a certain angle to achieve rotary cutting, and the tire strips are cut by rotary cutting. The width of the obtained tire strips can be controlled by controlling the cutting angle of the blade 1-1. During the cutting process, the roller 1-2 squeezes and pushes the waste tires 1-3 to complete the entire cutting work and obtain the cut tire strips.

[0038] The rotary cutting angle of the cutter head 1-1 on the waste tire 1-3 can be 10°, 15°, etc. The rotary cutting angle of the cutter head 1-1 is set based on the ability to obtain a tire strip of the desired width. The same waste tire 1-3 is cut to obtain a complete tire strip. The width of the tire strip can be 30mm, 40mm, etc. The rotary cutting method can cut the waste tire 1-3 into a complete strip, increase the length of the single strip, maintain its integrity, and reduce the strength damage of the grille 2-5 caused by excessive joints.

[0039] After tire strips are prepared using waste tires 1-3, the cut tire strips are made into grids 2-5 using ultrasonic welding technology.

[0040] like Figure 1 As shown, multiple longitudinal strips 4 are distributed as warps at intervals, one end of the longitudinal strip 4 is wound on the conveying roller 2-2, and the other end is wound on the winding roller 2-1. The conveying roller 2-2 gradually releases the longitudinal strip 4, and the winding roller 2-1 winds up the grid 2-5 formed by the fastener 5 and the transverse strip 3, and ultrasonic welding is applied to the fastener 5 between the conveying roller 2-2 and the winding roller 2-1, and the transverse strip 3 and the longitudinal strip 4 after the fastener 5 is installed are wound onto the winding roller 2-1.

[0041] like Figure 2 、 Figure 3 As shown, longitudinal strips 4 are arranged on conveyor roller 2-2 at intervals according to the grid size of grid 2-5. Transverse strips 3 are positioned on longitudinal strips 4 based on the grid size of grid 2-5. After the transverse strips 3 are placed, galvanized iron fasteners 5 are placed at the intersection of the strips. Fasteners 5 consist of two parts, upper and lower, that can overlap and assemble to secure the intersection. To facilitate welding, square pieces of the same material, less than 1 mm thick, are placed at the overlapped locations as connecting pieces 10.

[0042] Ultrasonic welding is performed using a welding device 2, which includes a guide rail 2-3, an adjustment arm 2-4, and a welding gun 2-6. Furthermore, a conveyor roller 2-2 and a winding roller 2-1 are also mounted on the welding device 2 and equipped with corresponding drive elements, such as a stepper motor or servo motor, to drive the conveyor roller 2-2 and the winding roller 2-1. Multiple welding guns 2-6 are spaced apart to correspond to the intersections on the transverse strip 3. The adjustment arm 2-4 is mounted on the guide rail 2-3 and slides along the guide rail 2-3 to change its relative position with the transverse strip 3. A clamp is provided at the end of the adjustment arm 2-4 to grip and drive the transverse strip 3.

[0043] The adjustment robot 2-4 utilizes a multi-joint or multi-axis design, enabling flexible movement and positioning in multiple directions. When used in the process of producing non-destructive grids from scrap tires, the adjustment robot 2-4 possesses four or more degrees of freedom, enabling translation in the X, Y, and Z directions, as well as at least one degree of freedom in rotation. This helps the adjustment robot 2-4 accurately locate the intersection of the transverse strips 3 and perform precise welding operations. Because the preparation of the grid 2-5 requires high-precision welding and positioning, the adjustment robot 2-4 requires a high-precision position control system to ensure accurate and consistent welding.

[0044] During operation, the adjusting robot arm 2-4 first moves to the initial position through its multi-axis design, ready to clamp the transverse strip 3. At this time, the clamp of the adjusting robot arm 2-4 can clamp from both ends of the transverse strip 3 to ensure stable movement and positioning. According to the preset grid size and strip spacing, the adjusting robot arm 2-4 slides along the guide rail 2-3 and adjusts its position so that the welding gun 2-6 can be accurately aligned with the intersection position on the transverse strip 3. At the same time, the clamp of the adjusting robot arm 2-4 may drive the transverse strip 3 to move to change the spacing between adjacent transverse strips 3. After the welding gun 2-6 is aligned with the intersection position, the ultrasonic welding equipment starts working to connect and fix the two parts of the fastener 5 at the intersection position. During this process, the adjusting robot arm 2-4 maintains stable clamping and positioning to ensure the accuracy and consistency of welding.

[0045] After completing welding at one intersection, the robot arms 2-4 are adjusted to continue moving to the next intersection for welding. The entire process may be automated through a preset program to improve production efficiency and reduce manual intervention.

[0046] By adjusting the distance between the clamps of the robotic arm 2-4 and the adjacent longitudinal strips 4 on the conveying roller 2-2, the grid size of the formed grid 2-5 can be flexibly adjusted to meet the needs of different application scenarios.

[0047] The tire grille 2-5 is prepared, and the fastener 5 is welded using the ultrasonic welding device 2. The robot arm 2-4 is adjusted to slide along the guide rail 2-3 so that the transverse strips 3 can be clamped and moved by the clamp, thereby changing the position of adjacent transverse strips 3, thereby adjusting the size of the grid required to be formed by the grille 2-5. The end of the welding gun 2-6 adopts a long strip welding head, which can penetrate into the position of the connecting piece 10, making it easy to apply ultrasonic welding to the position of the connecting piece 10, so that the transverse strips 3 and the longitudinal strips 4 are connected to form an integral grille 2-5.

[0048] like Figure 4 As shown, the fastener 5 includes an upper buckle 6 and a lower buckle 7. The upper buckle 6 includes an upper plate and an upper claw 8 located at the corner position of the upper plate. The lower buckle 7 includes a lower plate and a lower claw 9 located at the corner position of the lower plate. The upper plate fits the top surface of the intersection position and the lower plate fits the bottom surface of the intersection position. The upper claw 8 and the lower claw 9 are connected and are located on the side of the intersection position.

[0049] Both the upper and lower plates are cross-shaped plates 11. The four corners of the upper plate are connected to the lower claws 9 of the lower buckle 7 via upper claws 8. Connecting pieces 10 are located at the butt joints between the upper claws 8 and the lower claws 9. Upper claws 8 and lower claws 9 are distributed within the four grids circumferentially around the intersection, so that the upper claws 8 and lower claws 9 fit the sides of the longitudinal strips 4 and transverse strips 3 at the intersection.

[0050] The welding device 2 can also be equipped with an identification component to identify the position of the connecting piece 10 to be welded, thereby facilitating adjustment of the welding gun 2-6 to the position for welding the connecting piece 10, thereby improving welding precision and welding effect. The ultrasonic welding device 2 sets the connecting piece 10 at the welding position, and the fastener 5 is locked in position by ultrasonic welding. The connecting piece 10 compensates for dimensional changes during the welding process, ensuring the fastener 5's fit and locking ability at the intersection of the tire strips, and thus ensuring the strength and performance of the resulting grille 2-5. This can effectively prevent welding failures caused by excessive thickness of the tire grille 2-5.

[0051] It is understandable that the number and spacing of the transverse strips 3 and longitudinal strips 4 corresponding to the grilles 2-5 can be changed as needed.

[0052] During welding, multiple welding guns 2-6 are spaced apart corresponding to the intersections on the transverse strip 3, enabling simultaneous welding of fasteners 5 at multiple intersections corresponding to the same transverse strip 3, that is, simultaneously welding fasteners 5 in the same row. After welding of one row of fasteners 5 is completed, the winding roller 2-1 rotates to move the next row of fasteners 5 to be welded to the welding position, and this cycle continues until the welding is complete. After welding is complete, the winding roller 2-1 is removed, and the tire grille 2-5 is removed for direct use in actual engineering.

[0053] The entire process fully utilizes the waste tires 1-3, achieving lossless conversion and reuse of waste resources. The grilles 2-5 prepared by the above process have high strength and good performance due to the tight fit of the fasteners 5 and the firm fixation by ultrasonic welding.

[0054] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A process for preparing non-destructive grids from waste tires, characterized in that: include: Cutting waste tires to obtain tire strips, which are divided into transverse strips and longitudinal strips according to their distribution direction; Before cutting the waste tires to obtain tire strips, the waste tires are cut. When cutting the waste tires, they are cut by rotary cutting so that the same waste tire can be cut into a whole tire strip. When cutting, the cutting angle is controlled to control the width of the tire strip. A plurality of longitudinal strips are distributed as warps, a plurality of transverse strips are distributed as wefts, and the transverse strips and the longitudinal strips are cross-crossed; A fastener is installed at the intersection of the transverse strip and the longitudinal strip, and the two parts of the fastener are buckled and connected from the top and bottom respectively. A connecting piece is provided at the buckling position. Ultrasonic welding is applied to the fastener to connect and fix the two parts of the fastener at the intersection, thereby fixing the positions of the transverse strip and the longitudinal strip. The fastener includes an upper buckle and a lower buckle. The upper buckle includes an upper plate and an upper claw located at the corner position of the upper plate. The lower buckle includes a lower plate and a lower claw located at the corner position of the lower plate. The connecting piece is located at the butt joint between the upper claw and the lower claw. The welding device includes a guide rail, an adjustment robot arm and a welding gun. Multiple welding guns are distributed at intervals corresponding to the cross positions on the transverse strips. The adjustment robot arm is installed on the guide rail. The adjustment robot arm slides along the guide rail to change the spacing between adjacent transverse strips. A clamp is provided at the end of the adjustment robot arm to clamp and drive the transverse strips.

2. The process for preparing non-destructive grids from waste tires according to claim 1, wherein: The upper plate is in contact with the top surface of the intersection position, the lower plate is in contact with the bottom surface of the intersection position, and the upper claw part and the lower claw part are connected and are located on the side of the intersection position.

3. The process for preparing non-destructive grids from waste tires as claimed in claim 2, characterized in that: The upper plate and the lower plate are both cross-shaped plates, and the four corner positions of the upper plate are connected to the lower claws of the lower buckle through upper claws respectively.

4. The process for preparing non-destructive grids from waste tires according to claim 1, wherein: One end of the longitudinal strip is wound on a conveying roller, and the other end is wound on a winding roller. Ultrasonic welding is applied to the fastener between the conveying roller and the winding roller, and the transverse strip and the longitudinal strip after the fastener is installed are wound onto the winding roller.

5. The process for preparing non-destructive grids from waste tires according to claim 1, wherein: The clamps of the adjustment mechanical arm clamp the two ends of the transverse strip respectively, driving the transverse strip to move so as to change the distance between adjacent transverse strips.

6. The process for preparing non-destructive grids from waste tires as claimed in claim 4, characterized in that: The spacing between adjacent longitudinal strips on the conveyor roller is adjusted to adjust the mesh size of the formed grid.

7. The process for preparing non-destructive grids from waste tires according to claim 1, wherein: The fasteners are fitted to the sides of the transverse strips and the longitudinal strips at the cross position, and the longitudinal strips and the transverse strips are fitted to each other at the cross position.

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