A geogrid rotary stretching type welding mechanism and a method of using the same

Abstract

The present application relates to a kind of geogrid rotary stretching type welding mechanism and its using method, including belt shaping clamp, welding torch assembly and air cooling mechanism, the belt shaping clamp includes two left and right single-side rotary clamping mechanisms, the single-side rotary clamping mechanism includes fixed support plate, multiple clamp seats are connected in fixed support plate along annular sliding and annular drive mechanism for driving multiple clamp seats to move, clamp seat is equipped with the clamping assembly of the end of clamping transverse strip, the belt shaping clamp is provided with stretching station and shaping station along geogrid moving direction, the spacing of the clamping assembly of the both ends of transverse strip in stretching station gradually increases, welding torch assembly and air cooling mechanism are all arranged in shaping station, the present application is completed while the automatic welding of horizontal band, realizes the whole process tensioning and shaping and shaping of product during all welding points are completely cooled from product welding, substantially reduces and avoids the product deformation caused by welding.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of geogrid processing, especially to the field of geogrid hot melt welding, in particular to a geogrid rotary stretching type welding mechanism and a using method thereof. BACKGROUND

[0002] The geogrid is an important geosynthetic material, which is generally a net structure composed of horizontal strips and vertical strips. The geogrid processing has several ways such as stretching, weaving and welding. The welding forming is to connect the horizontal strips and the vertical strips by hot melt welding. At present, there are automatic welding devices for geogrids on the market. For example, the patent CN103056564A discloses a geogrid welding machine. The material is sent horizontally by a feeding device. The controller controls the welding head to weld the lap joint of the horizontal strip and the vertical strip. The automatic feeding, automatic cutting and automatic welding can be realized.

[0003] During welding, the welding device drives the welded geogrid to move. The vertical strip extends along the direction of movement. The horizontal strip is perpendicular to the direction of movement. The current automatic welding device for geogrids has some defects. After welding, the horizontal strip is easily deformed due to the heat melting and cooling, which affects the planar state of the geogrid. SUMMARY

[0004] The present application provides a geogrid rotary stretching type welding mechanism and a using method thereof to solve the problems in the prior art.

[0005] The present application is realized by the following technical scheme. A geogrid rotary stretching type welding mechanism is provided, which comprises a belt feeding and shaping clamp, a welding gun assembly and an air cooling mechanism. The belt feeding and shaping clamp comprises two left and right single-sided rotary clamping mechanisms. The single-sided rotary clamping mechanism comprises a fixed support plate, a plurality of clamp seats connected to the fixed support plate in a ring shape and a ring-shaped driving mechanism for driving the movement of the plurality of clamp seats. A clamping assembly for clamping the end of the horizontal strip is mounted on the clamp seat. The belt feeding and shaping clamp is provided with a stretching station and a shaping station along the direction of movement of the geogrid. The distance between the clamping assemblies at the two ends of the horizontal strip in the stretching station gradually increases. The welding gun assembly and the air cooling mechanism are both arranged in the shaping station.

[0006] In the present scheme, the two left and right single-sided rotary clamping mechanisms clamp the two ends of the horizontal strip respectively and stretch the horizontal strip in the stretching station. After stretching, the horizontal strip is subjected to hot melt welding in the welding gun assembly and air cooling in the air cooling mechanism. During the whole welding and cooling process, the horizontal strip is in a stretched state. The welding deformation and stress of the product are eliminated to the greatest extent, thereby ensuring the overall quality of the product.

[0007] As optimization, the clamping assembly comprises a clamping jaw hinged on the clamp base, the lower end of the clamping jaw is provided with a clamping surface which is an anti-skid plane, a support plate is arranged below the clamping jaw on the clamp base, an anti-skid pad is fixed on the support plate, the transverse strip is clamped between the clamping surface and the anti-skid pad, the one-side rotary clamping mechanism is provided with an inlet clamping drive at one end close to the incoming direction to drive the upper end of the clamping jaw to swing downward to clamp the transverse strip, and the rotary clamping mechanism is provided with an outlet releasing drive at one end close to the outgoing direction to drive the upper end of the clamping jaw to swing upward to release the transverse strip. In the scheme, when the clamp base moves in a ring shape to the incoming end, the inlet clamping drive drives the clamping jaw to swing to clamp the transverse strip between the clamping surface and the anti-skid pad, and the automatic locking is realized by the planar clamping surface, when the clamp base moves in a ring shape to the outgoing end, the outlet releasing drive drives the upper end of the clamping jaw to swing upward to release the transverse strip, so that the transverse strip after welding is followed by the geogrid into the subsequent process.

[0008] As optimization, the inlet clamping drive comprises a clamping cylinder fixedly arranged, and the telescopic shaft of the clamping cylinder is located above the clamping jaw. In the scheme, the clamping cylinder presses the clamping jaw passing through the clamping cylinder downward, so that the clamping is realized.

[0009] As optimization, the upper end of the clamping jaw is inclined upward, the outlet releasing drive comprises a releasing wheel shafted on the fixed support plate, and the releasing wheel is located below the upper end of the clamping jaw. In the scheme, the upper end of the clamping jaw is inclined upward, when the inclined surface passes through the releasing wheel, the distance between the center of the releasing wheel and the clamping jaw gradually decreases, so that the clamping jaw is gradually lifted upward and released, and each clamping jaw passing through the releasing wheel can be automatically lifted and released.

[0010] As optimization, the welding gun assembly comprises a welding gun mounting frame and a plurality of welding cylinders mounted side by side on the welding gun mounting frame, the lower end of the telescopic shaft of the welding cylinder is provided with a hot melt welding gun, and a support platform located below the transverse strip is arranged below the hot melt welding gun. In the scheme, each hot melt welding gun corresponds to each longitudinal strip on the transverse strip, the welding cylinder and its telescopic shaft ensure sufficient rigidity, which can completely resist the lateral bending deformation caused by the friction of the strip welding deformation, so as to ensure the welding quality.

[0011] As optimization, the air cooling mechanism comprises an air bellow located above the transverse strip and a reflecting plate located below the transverse strip, and the lower end of the air bellow is provided with an air outlet. In the scheme, the air outlet blows air to the upper layer of the transverse strip, the air passing through the transverse strip is reflected by the reflecting plate to blow to the lower layer of the transverse strip, so that the whole strip is air-cooled, cooled and shaped.

[0012] As the optimization, the welding mechanism further comprises a step rolling traction device for driving the step conveying of the geogrid, the step rolling traction device comprising an upper driving roller, a lower driving roller and a driving roller motor for driving the opposite rotation of the upper driving roller and the lower driving roller.

[0013] A method for using the geogrid rotary stretching type welding mechanism, comprising the following steps:

[0014] a. One or more (as required) transverse strips are sent into the clamping position of the strip feeding shaping clamp, the clamping cylinder pushes the clamping jaw of the strip feeding shaping clamp to complete the clamping action on the transverse strip end and quickly reset; the strip feeding shaping clamp completes the clamping of a transverse strip once per movement of the strip feeding shaping clamp;

[0015] b. The transverse strip in the strip feeding shaping clamp is tensioned in the stretching station, and after tensioning, enters the welding gun assembly for hot melt welding; after welding, the welded transverse strip is moved out of the welding position and is cooled and shaped by the air cooling mechanism;

[0016] c. The transverse strip in the strip feeding shaping clamp is moved to the discharge position, and under the action of the discharge release drive, the clamping of the transverse strip is released;

[0017] d. The welded product in the free state is stepwise moved under the stepwise traction of the step rolling traction device and enters the subsequent automatic coiling device.

[0018] The beneficial effects of the present application are that the transverse strip shaping system with the strip feeding shaping clamp structure realizes the whole process tensioning, shaping and shaping of the product from the welding of the product to the complete cooling of all the welding points, greatly reduces and avoids the product deformation caused by welding. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a top view of the present application;

[0020] Figure 2 is a top view of the present application Figure 1 is an A-A sectional view before clamping of the strip feeding shaping clamp in the present application;

[0021] Figure 3 is an A-A sectional view after clamping of the strip feeding shaping clamp in the present application Figure 1

[0022] Figure 4 is a B-B sectional view in the present application; Figure 1

[0023] Figure 5 is a B-B sectional view in the present application​​Figure 1 Cross-sectional view along the plane C-C;

[0024] Figure 6 For the invention Figure 1 Cross-sectional view along the plane D-D;

[0025] Figure 7 For the invention Figure 1 Cross-sectional view along the plane E-E;

[0026] As shown in the figure:

[0027] 1, transverse strip, 2, longitudinal strip, 3, belt feeding shaping clamp, 31, fixed support plate, 32, clamp seat, 33, clamping jaw, 34, support plate, 35, walking wheel, 36, clamping cylinder, 37, release wheel, 4, welding gun assembly, 41, welding gun mounting frame, 42, welding cylinder, 43, hot melt welding gun, 44, support platform, 5, air cooling mechanism, 51, air bellow, 52, air outlet, 53, reflecting plate, 54, baffle, 6, step rolling traction device, 61, upper drive roller, 62, lower drive roller. DETAILED DESCRIPTION

[0028] In order to clearly illustrate the technical features of the scheme, the scheme will be described below through specific embodiments.

[0029] As Figures 1-7 shown, a geogrid rotary stretching type welding mechanism of the present application, comprising a belt feeding shaping clamp 3, a welding gun assembly 4 and an air cooling mechanism 5, the belt feeding shaping clamp 3 comprises two single-sided rotary clamping mechanisms on the left and right, and the two single-sided rotary clamping mechanisms clamp the two ends of the transverse strip 1 respectively.

[0030] The single-sided rotary clamping mechanism comprises a fixed support plate 31, a plurality of clamp seats 32 connected in a ring shape on the fixed support plate 31, and a ring-shaped driving mechanism for driving the movement of the plurality of clamp seats 32, in the embodiment, the clamp seats 32 are connected to the edge of the fixed support plate 31 through the walking wheels 35, the fixed support plate 31 is a long strip-shaped horizontal plate, and a vertical track is provided on the outer edge of the fixed support plate 31, so that the clamp seats 32 can move in a ring shape on the track on the edge of the fixed support plate 31, in the embodiment, the ring-shaped driving mechanism comprises a chain connected between the clamp seats 32, and a sprocket and a motor for driving the chain, the motor in the ring-shaped driving mechanism drives the sprocket to rotate, thereby driving the chain to move, and the clamp seats 32 are all connected to the chain, thereby realizing the synchronous movement of all the clamp seats 32.

[0031] The clamp seat 32 is provided with a clamping assembly for clamping the end of the transverse strip 1, which comprises a clamping jaw 33 hinged to the clamp seat 32. The clamping jaw 33 is long strip-shaped and hinged to the clamp seat 32 at the middle and lower part, so that the clamping jaw 33 can swing left and right. The lower end of the clamping jaw 33 is provided with a clamping surface, which is an anti-skid surface. The clamp seat 32 is provided with a support plate 34 below the clamping jaw 33. The support plate 34 is fixedly connected with an anti-skid pad, which has a certain elasticity. Thus, the clamping jaw 33 can overcome the elasticity to make the clamping surface and the anti-skid pad adhere to each other. The transverse strip 1 is clamped between the clamping surface and the anti-skid pad. When clamped, the anti-skid surface at the lower end of the clamping jaw 33 approaches the upper end surface of the anti-skid pad, and the transverse strip is clamped therebetween. The clamping jaw 33 can be kept in the clamped state.

[0032] The single-side rotary clamping mechanism is provided with a feeding and clamping drive near one end in the feeding direction, which drives the upper end of the clamping jaw 33 to swing downward to clamp the transverse strip 1. The feeding and clamping drive comprises a clamping cylinder 36 fixedly arranged. The extension shaft of the clamping cylinder 36 is located above the clamping jaw 33. The clamping cylinder 36 drives the corresponding clamping jaw 33 to press downward, thereby realizing the clamping of the transverse strip.

[0033] The rotary clamping mechanism is provided with a discharging and releasing drive near one end in the discharging direction, which drives the upper end of the clamping jaw 33 to swing upward to release the transverse strip 1. Figure 1 、 6 The upper end of the clamping jaw 33 is inclined upward. The discharging and releasing drive comprises a releasing wheel 37 shaft-connected to the fixed support plate 31. The releasing wheel 37 is tangent to the annular movement track of the clamping jaw 33. The releasing wheel 37 is located below the upper end of the clamping jaw 33. When the clamping jaw 33 approaches the releasing wheel 37 along the tangent direction, the inclined surface below the clamping jaw 33 adheres to the releasing wheel 37. As the clamping jaw 33 continues to approach the releasing wheel 37 along the tangent direction, the size of the releasing wheel 37 inserted into the clamping jaw 33 gradually increases, thereby lifting the clamping jaw 33 upward. Each clamping jaw 33 passing through the releasing wheel 37 is lifted in turn.

[0034] The belt feeding and shaping clamp 3 is provided with a stretching station and a shaping station along the movement direction of the geogrid. The distance between the clamping assemblies at the two ends of the transverse strip 1 in the stretching station gradually increases, thereby stretching the transverse strip. The welding gun assembly 4 and the air cooling mechanism 5 are arranged in the shaping station.

[0035] The welding gun assembly 4 comprises a welding gun mounting frame 41 and a plurality of welding cylinders 42 arranged side by side on the welding gun mounting frame 41. The lower end of the extension shaft of the welding cylinder 42 is provided with a hot melt welding gun 43. Each hot melt welding gun corresponds to each longitudinal strip 2 on the transverse strip 1, thereby welding the connecting nodes of the transverse strip 1 and the longitudinal strip 2.

[0036] The hot melt welding gun 43 is provided with a supporting platform 44 below the transverse strip 1, which is used to support the connection node for welding, and the clamping belt shaping clamp 3 keeps clamping the ends of the transverse strip during welding.

[0037] The air cooling mechanism 5 comprises an air bellow 51 above the transverse strip 1 and a reflecting plate 53 below the transverse strip 1, the air bellow 51 extends along the length direction of the transverse strip 1, and the lower end of the air bellow 51 is provided with an air outlet 52, so as to forcibly air cool the transverse strip 1 below.

[0038] The reflecting plate 53 extends along the length direction of the transverse strip 1, and the two sides of the reflecting plate 53 extend upwardly with a baffle, so that the cross section of the reflecting plate 53 is U-shaped.

[0039] The air bellow 51 is communicated with a blowing device, which provides cold air for the air bellow 51, and the blowing device comprises a fan and a heat exchange box, air passes through the gap of the heat exchange pipe group in the internal heat exchange box, which circulates cooling water, to complete cooling, and then enters the fan, and after being compressed by the fan, the air forms cooling air, i.e. cold air, and is then sent into the air bellow 51.

[0040] The welding mechanism further comprises a step rolling traction device 6 for driving the step conveying of the geogrid, the step rolling traction device 6 comprises an upper driving roller 61, a lower driving roller 62 and a driving roller motor for driving the opposite rotation of the upper driving roller 61 and the lower driving roller 62. The upper driving roller 61 and the lower driving roller 62 are rubber-coated rollers, which ensure sufficient friction force required for traction, so as to realize the clamping conveying of the geogrid.

[0041] A method for using a geogrid rotary stretching type welding mechanism, comprising the following steps:

[0042] a. One or more (as required) transverse strips 1 completely enter the clamping position of the belt shaping clamp 3, the clamping cylinder 36 pushes the clamping jaw 33 of the belt shaping clamp 3, and the clamping action on the transverse strip end is completed and quickly reset; the belt shaping clamp 3 completes the clamping of one or more (as required) transverse strips 1 every time it moves, and gradually completes the clamping of all strips of the strip group.

[0043] b. The transverse strip 1 in the belt shaping clamp 3 is tensioned in the stretching station, and after being tensioned, it enters the welding gun assembly for hot melt welding, and after the welding is completed, the belt shaping clamp moves normally while the welding gun assembly is opened, so as to move the welded transverse strip 1 out of the welding position and cool and shape it through the air cooling mechanism;

[0044] c. The transverse strip 1 in the belt shaping fixture 3 is moved to the discharge position, under the action of the discharge release drive, the clamping of the transverse strip 1 is released, the geogrid is in a free state at this position, the shaping process after the product welding has been completed, the overall temperature of the product has been not higher than the ambient temperature, and the welding deformation of the product has been completely eliminated.

[0045] d. The welded product in the free state is moved step by step under the step-by-step traction of the step-by-step rolling traction device, and enters the subsequent automatic coiling device.

[0046] Of course, the above description is not limited to the above examples, and the technical features not described in the application can be realized by or using the prior art, which will not be repeated here; the above examples and drawings are only used to illustrate the technical solutions of the application and are not a limitation on the application, and the application has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that the changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the application do not deviate from the purpose of the application, and should also belong to the protection scope of the claims of the application.

Claims

1. A rotary tensile welding mechanism for geogrids, characterized in that: The device includes a tape feeding and shaping fixture (3), a welding gun assembly (4), and an air-cooling mechanism (5). The tape feeding and shaping fixture (3) includes two single-sided rotary clamping mechanisms on the left and right sides. Each single-sided rotary clamping mechanism includes a fixed support plate (31), multiple clamp seats (32) that are slidably connected to the fixed support plate (31) along the ring, and a ring drive mechanism that drives the multiple clamp seats (32) to move. The clamp seats (32) are equipped with clamping components that clamp the ends of the transverse strips (1). The tape feeding and shaping fixture (3) is provided with a stretching station and a shaping station along the moving direction of the geogrid. The spacing between the clamping components at both ends of the transverse strips (1) in the stretching station gradually increases. The welding gun assembly (4) and the air-cooling mechanism (5) are both located in the shaping station.

2. The rotary tensile welding mechanism for geogrids according to claim 1, characterized in that: The clamping assembly includes a jaw (33) hinged to a clamping seat (32). The lower end of the jaw (33) is provided with a clamping surface, which is an anti-slip surface. The clamping seat (32) is provided with a support plate (34) located below the jaw (33). An anti-slip pad is fixed on the support plate (34). The transverse strip (1) is clamped between the clamping surface and the anti-slip pad. The end of the single-sided rotary clamping mechanism near the material feeding direction is equipped with a feeding clamping drive that drives the upper end of the jaw (33) to swing downward so that the jaw (33) clamps the transverse strip (1). The end of the rotary clamping mechanism near the material discharging direction is equipped with a discharging release drive that drives the upper end of the jaw (33) to swing upward so that the jaw (33) releases the transverse strip (1).

3. The rotary tensile welding mechanism for geogrids according to claim 2, characterized in that: The feeding clamping drive includes a fixed clamping cylinder (36), the telescopic shaft of which is located above the gripper (33).

4. The rotary tensile welding mechanism for geogrids according to claim 2, characterized in that: The upper end of the gripper (33) is inclined upward, and the discharge release drive includes a release wheel (37) that is shaft-connected to the fixed support plate (31). The release wheel (37) is located below the upper end of the gripper (33).

5. The rotary tensile welding mechanism for geogrids according to claim 1, characterized in that: The welding gun assembly (4) includes a welding gun mounting frame (41) and multiple welding cylinders (42) mounted side by side on the welding gun mounting frame (41). A hot melt welding gun (43) is mounted on the telescopic shaft at the lower end of the welding cylinder (42). A support platform (44) located below the horizontal strip (1) is provided below the hot melt welding gun (43).

6. The rotary tensile welding mechanism for geogrids according to claim 1, characterized in that: The air-cooling mechanism (5) includes a bellows (51) located above the transverse strip (1) and a reflector (53) located below the transverse strip (1). The lower end of the bellows (51) has an air outlet (52).

7. The rotary tensile welding mechanism for geogrids according to claim 1, characterized in that: The welding mechanism also includes a stepping rolling traction device (6) for driving the geogrid to move in a stepping manner. The stepping rolling traction device (6) includes an upper driving roller (61), a lower driving roller (62), and a driving roller motor for driving the upper driving roller (61) and the lower driving roller (62) to rotate in opposite directions.

8. A method of using the rotary tensile welding mechanism for geogrids as described in claim 2, characterized in that, Includes the following steps: a. One or more transverse strips are fed into the clamping position of the feeding and shaping fixture. The clamping cylinder pushes the jaws of the feeding and shaping fixture to complete the clamping action on the end of the transverse strip and quickly resets. Each time the feeding and shaping fixture moves, it completes one clamping of the transverse strip. b. The transverse strip in the feeding and shaping fixture is tightened in the stretching station. After tightening, it enters the welding gun assembly for hot melt welding. After welding, the welded transverse strip is moved out of the welding position and cooled and shaped by the air cooling mechanism. c. The transverse strip in the feeding and shaping fixture moves to the discharge position, and the clamping of the transverse strip is released under the action of the discharge release drive. d. The welded product, now in a free state, moves step by step under the traction of the stepping rolling traction device and enters the subsequent automatic winding device.

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