Process for preparing lossless grating from waste tires

Abstract

The invention provides a process for preparing a lossless grid from waste tires, relates to the technical field of solid waste treatment, and aims to solve the problem of insufficient strength of intersection point connecting positions of a grid produced from the waste tires at present, the waste tires are cut to obtain tire strips, and the tire strips are arranged in a manner that warps and wefts are crossed; the fasteners are arranged at the crossed positions for fixing, the fasteners are locked in position in an ultrasonic welding mode, the size change in the welding process is compensated through the connecting pieces, the attaching performance and the locking capacity of the fasteners to the crossed positions of the tire strips are guaranteed, and the strength and the performance of the formed grating are guaranteed.

Description

Technical Field

[0001] The 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 wastes, and improper disposal will endanger the ecological environment. When using waste tires, they can be recycled and ground into powder and added to building materials as an external admixture, which can effectively improve the energy absorption and shock absorption performance of the materials; or they can be cut into strips and overlapped to form a grid shape, which can be used in the foundation to play a reinforcement role.

[0003] Regarding the process of preparing the tire into a grid after cutting, a Chinese patent (publication number: CN116837717A) discloses a waste tire grid reinforced ribbed bridge embankment structure and construction method, which uses waste tire strips to apply preload, fully utilizes the elastic retraction force of the tire strips, and offsets the increase in grid tensile deformation caused by differential settlement during operation. Other prior arts also provide other applications of tire strip grids in construction. Traditional geogrids are processed using a dedicated welding system, and the cross positions of the vertical and horizontal strips are welded and fixed. As the strips are continuously transported, the cross positions are welded in sequence to obtain the formed geogrid. However, the tire strip grid is not made of metal. If the cross position is fixed by puncture, the strip will be damaged to produce a weak position, which will easily cause breakage during subsequent construction and service. If the cross position is fixed by fasteners, the tire strips are made of elastic material. When the fasteners are fastened and installed, it is easy to have insufficient pressing force, resulting in insufficient connection strength or excessive compression and damage to the strips, which affects the performance of the grid formed by the tire strips. Summary of the invention

[0004] The purpose of the present invention is to provide a process for preparing non-destructive grilles from waste tires in view of the defects of the prior art. The waste tires are cut to obtain tire strips, which are arranged in a manner where the warp and weft are crossed, and fasteners are set at the intersections for fixing. The fasteners are locked in position by ultrasonic welding, and the size changes during the welding process are compensated by connecting pieces, thereby ensuring the fit and locking ability of the fasteners to the intersections of the tire strips, and ensuring the strength and performance of the formed grilles.

[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 the 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-shaped;

[0009] A fastener is installed at the intersection of the transverse strip and the longitudinal strip. 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 the two parts of the fastener and fix them at the intersection, thereby fixing the positions of the transverse strip and the longitudinal strip.

[0010] Furthermore, when cutting the waste tire, the waste tire is cut by rotary cutting so that a whole tire strip can be obtained after cutting the same waste tire.

[0011] Furthermore, before cutting the waste tires to obtain tire strips, the waste tires are cut, 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 portion located at a corner position of the upper plate, the lower buckle includes a lower plate and a lower claw portion located at a corner position of the lower plate, the upper plate fits the top surface of the intersection position, 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 rolled up to 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 crossing positions on the transverse strip. The adjusting robot arm is installed on the guide rail. 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 adjusting mechanical 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 strip and the longitudinal strip at the intersection, and the longitudinal strip fits the transverse strip at the intersection.

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

[0020] (1) In view of the problem that the grids currently produced using waste tires have insufficient strength at the intersection connection positions, tire strips are cut from waste tires and arranged in a manner where the warp and weft lines intersect, and fasteners are set at the intersection positions for fixing. 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, thereby ensuring the fit and locking ability of the fasteners to the intersection positions of the tire strips, and ensuring the strength and performance of the formed grids.

[0021] (2) Cutting waste tires to obtain tire strips and preparing 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 in the specification, 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 This is a schematic diagram of adjusting the mechanical 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. adjusting 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 waste tires 1-3, and the tire strips are distributed in a vertical and horizontal cross manner and fasteners 5 are installed at the cross position for fixing, forming a grid 2-5 for engineering construction. However, when fasteners 5 are installed at the cross position of the tire strips, it is easy to damage the tire strips, resulting in weak positions in the formed grid 2-5. At the same time, the bonding between the fasteners 5 and the tire strips is poor, and there is a problem of insufficient connection strength at the poor position. Based on this, this embodiment provides a process for preparing a non-destructive grid from waste tires, in which the tire strips are arranged in a manner that the warp and weft are crossed, fasteners 5 are set at the cross position for fixing, the fasteners 5 are locked in position by ultrasonic welding, and the connecting piece 10 is used to compensate for the size change during the welding process to ensure the fit and locking ability of the fasteners 5 to the cross position of the tire strips.

[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, wherein the tire strips are divided into a transverse strip 3 and a longitudinal strip 4 according to a distribution direction;

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

[0035] A 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 buckled and connected from the top and bottom respectively. A connecting piece 10 is provided at the buckling 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 from excess parts by a upper cutter, leaving only the middle part of the waste tires 1-3 for preparing strips.

[0037] like Figure 1As shown, the waste tire 1-3 is cut by using the tire cutting device 1. The processed waste tire 1-3 is placed on the tire cutting device 1. The rotary cutting is achieved by setting the cutter disc 1-1 at a certain angle. The tire strip is cut to form a tire strip by rotary cutting. The width of the obtained tire strip can be controlled by controlling the cutting angle of the cutter disc 1-1. During the cutting process, the waste tire 1-3 is squeezed and pushed by the roller 1-2 to complete the entire cutting work and obtain the cut tire strip.

[0038] The rotary cutting angle of the cutter disc 1-1 to the waste tire 1-3 can be 10°, 15°, etc., and the tire strips of the required width can be obtained as the basis for setting the rotary cutting angle of the cutter disc 1-1, and the same waste tire 1-3 can be cut to obtain a whole tire strip, and the width of the tire strip can be 30mm, 40mm, etc. The rotary cutting method can be used to cut the waste tire 1-3 into a complete strip, increase the length of a single strip, do not destroy its integrity, and reduce the strength damage of the grille 2-5 caused by too many joints.

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

[0040] like Figure 1 As shown, a plurality of longitudinal strips 4 are distributed at intervals as warps, 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 matching fasteners 5 and the transverse strips 3, ultrasonic welding is performed on the fasteners 5 between the conveying roller 2-2 and the winding roller 2-1, and the transverse strips 3 and the longitudinal strips 4 after the fasteners 5 are installed are wound onto the winding roller 2-1.

[0041] like Figure 2 , Figure 3 As shown, the longitudinal strips 4 are arranged on the conveyor roller 2-2 at intervals according to the grid size of the grille 2-5, and the transverse strips 3 are placed on the longitudinal strips 4 according to the grid size of the grille 2-5. After the transverse strips 3 are placed, the fasteners 5 made of galvanized iron material are placed at the cross position of the strips. The fasteners 5 are divided into upper and lower parts, which can be overlapped and combined to fix the cross position. In order to facilitate welding construction, a square piece of the same material with a thickness of less than 1 mm is set as a connecting piece 10 at the overlap position.

[0042] Ultrasonic welding is applied by a welding device 2, which includes a guide rail 2-3, an adjustment arm 2-4 and a welding gun 2-6. In addition, a conveying roller 2-2 and a winding roller 2-1 are also installed on the welding device 2, and are equipped with corresponding driving elements, such as a stepping motor, a servo motor, etc., to drive the conveying roller 2-2 and the winding roller 2-1 to rotate. A plurality of welding guns 2-6 are distributed at intervals corresponding to the cross positions on the transverse strip 3, and the adjustment arm 2-4 is installed on the guide rail 2-3. The adjustment arm 2-4 slides along the guide rail 2-3 to change its relative position with the transverse strip 3. A clamp for clamping and driving the transverse strip 3 is provided at the end of the adjustment arm 2-4.

[0043] Among them, the adjusting robot arm 2-4 adopts a multi-joint or multi-axis design so that it can be flexibly moved and positioned in multiple directions. When applied to the process of preparing non-destructive grids from waste tires, the adjusting robot arm 2-4 has four or more degrees of freedom to achieve translation in the three directions of X, Y, and Z and freedom in at least one rotation direction. It helps to adjust the robot arm 2-4 to accurately locate the intersection position on the transverse strip 3 and perform precise welding operations. Since the preparation of the grid 2-5 requires high-precision welding and positioning, the adjusting robot arm 2-4 needs to have a high-precision position control system to ensure the accuracy and consistency of welding.

[0044] When working, 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. When the welding gun 2-6 is aligned with the intersection position, the ultrasonic welding equipment starts to work, connecting and fixing 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 the welding of one cross position, the robot arm 2-4 is adjusted to continue to move to the next cross position for welding operation. The whole process may be automatically controlled by a preset program to improve production efficiency and reduce manual intervention.

[0046] By adjusting the distance between the clamps of the robot 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 by using the ultrasonic welding device 2. When the mechanical arm 2-4 is adjusted to slide along the guide rail 2-3, the transverse strip 3 can be clamped and moved by the clamp, thereby changing the position of the 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, so as to facilitate ultrasonic welding at the position of the connecting piece 10, so that the transverse strip 3 and the longitudinal strip 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 portion 8 located at a corner position of the upper plate. The lower buckle 7 includes a lower plate and a lower claw portion 9 located at a 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 8 and the lower claw portion 9 are connected and are located on the side of the intersection position.

[0049] The upper plate and the lower plate are both cross-shaped plates 11, and the upper plate is connected to the lower claws 9 of the lower buckle 7 through the upper claws 8 at the four corners, and the connecting piece 10 is located at the butt joint between the upper claws 8 and the lower claws 9. The upper claws 8 and the lower claws 9 are distributed in the four grids around the intersection, so that the upper claws 8 and the lower claws 9 fit the side surfaces of the longitudinal strips 4 and the transverse strips 3 at the intersection.

[0050] The welding device 2 can also be provided with an identification component to identify the position of the connecting piece 10 to be welded, so that the welding gun 2-6 can be adjusted to the position where the welding is applied to the connecting piece 10, thereby improving the welding accuracy 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, so that the connecting piece 10 compensates for the dimensional change during the welding process, ensures the fit and locking ability of the fastener 5 to the cross position of the tire strip, ensures the strength and performance of the formed grille 2-5, and can effectively avoid the welding failure caused by the tire grille 2-5 being too thick.

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

[0052] During welding, multiple welding guns 2-6 are spaced apart corresponding to the cross positions on the transverse strip 3, and can simultaneously weld the fasteners 5 at multiple cross positions corresponding to the same transverse strip 3, that is, can simultaneously weld the fasteners 5 in the same row. After the welding of one row of fasteners 5 is completed, the winding roller 2-1 rotates to transfer the next row of fasteners 5 to be welded to the welding position, and the cycle is repeated until the welding work is completed. After the welding work is completed, the winding roller 2-1 is removed, and the tire grille 2-5 that can be directly applied to the actual project is removed.

[0053] The entire process makes full use of the materials of the waste tires 1-3, achieving lossless transformation and reuse of waste resources. The grille 2-5 prepared by the above process has high strength and good performance due to the tight fit of the fasteners 5 and the firm fixation of the ultrasonic welding.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope 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 the distribution direction; 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-shaped; A fastener is installed at the intersection of the transverse strip and the longitudinal strip. 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 the two parts of the fastener and fix them at the intersection, thereby fixing the positions of the transverse strip and the longitudinal strip.

2. The process for preparing non-destructive grids from waste tires as claimed in claim 1, characterized in that: When cutting the waste tires, the tires are cut by rotary cutting so that the same waste tire can be cut into a whole tire strip.

3. The process for preparing non-destructive grids from waste tires as claimed in claim 1 or 2, characterized in that: Before cutting the waste tires to obtain tire strips, the waste tires are cut, and the cutting angle is controlled during cutting to control the width of the obtained tire strips.

4. The process for preparing non-destructive grids from waste tires as claimed in claim 1, characterized in that: The fastener includes an upper buckle and a lower buckle. The upper buckle includes an upper plate and an upper claw portion located at a corner position of the upper plate. The lower buckle includes a lower plate and a lower claw portion located at a 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.

5. The process for preparing non-destructive grids from waste tires as claimed in claim 4, 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 the upper claws respectively, and the connecting piece is located at the docking position between the upper claw and the lower claw.

6. The process for preparing non-destructive grids from waste tires as claimed in claim 1, characterized in that: 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 rolled up to the winding roller.

7. The process for preparing non-destructive grids from waste tires as claimed in claim 6, characterized in that: 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 crossing positions on the transverse strip. The adjusting robot arm is installed on the guide rail. 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.

8. The process for preparing non-destructive grids from waste tires as claimed in claim 7, characterized in that: The clamps of the adjusting mechanical arm clamp the two ends of the transverse strip respectively, driving the transverse strip to move so as to change the interval between adjacent transverse strips.

9. The process for preparing non-destructive grids from waste tires as claimed in claim 6, 7 or 8, characterized in that: The spacing between adjacent longitudinal strips on the conveyor rollers is adjusted to adjust the mesh size of the formed grid.

10. The process for preparing non-destructive grids from waste tires according to claim 1, characterized in that: The fastener fits the side surfaces of the transverse strip and the longitudinal strip at the intersection, and the longitudinal strip fits the transverse strip at the intersection.

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