An automatic bending device for stainless steel pipes

Abstract

The present invention discloses an automatic bending device for stainless steel pipes, belonging to the technical field of steel pipe bending. It includes a pipe feeding device, on which a conveying device is arranged. The conveying device is used to drive the stainless steel pipe to move. A bending device is arranged on the conveying device, and the bending device is used to bend the stainless steel pipe. The pipe feeding device set in the present invention can realize feeding one stainless steel pipe each time, automatically adjust the posture of the stainless steel pipe and then insert the stainless steel pipe onto the pipe seat. The whole process is coordinated with the subsequent stainless steel pipe bending processing work process, with high automation degree. The conveying device can drive the stainless steel pipe to be conveyed, and realize automatic sand injection, capping and bending and other actions on the stainless steel pipe. All processes are carried out synchronously. When performing operation actions, the conveyor belt stops rotating, with high automation degree. Before the stainless steel pipe is bent, sand and a lid are already installed inside, reducing the deformation of the stainless steel pipe during bending.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe bending, and particularly relates to an automatic bending device for stainless steel pipes. Background Art

[0002] Stainless steel pipes are common pipes in daily life. Under normal circumstances, elbows are required to connect when the pipeline turns. However, for non-right-angle turns, elbows cannot be used, and at this time, the steel pipe needs to be bent. If the steel pipe is directly bent, it is easy to have wrinkles or even bend and deform, and in severe cases, the steel pipe will break. Therefore, preparatory work such as sand filling and auxiliary springs is required before bending to reduce deformation. The existing stainless steel pipe bending machines usually require manual loading and unloading, manual sand filling, and manual adjustment of the bending angle. Each time the steel pipe is bent, manual participation is required in each step, with low automation and inability to continuously bend the stainless steel pipe, resulting in low efficiency. Summary of the Invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: an automatic bending device for stainless steel pipes, including a pipe feeding device. The pipe feeding device includes a feeding box, and a conveying device is arranged on the pipe feeding device. The conveying device includes a transmission frame, and the conveying device is used to drive the stainless steel pipe to move. A bending device is arranged on the conveying device. The bending device includes an electric cylinder frame, and the electric cylinder frame is fixedly installed on the transmission frame. The bending device is used to bend the stainless steel pipe.

[0004] Further, the pipe feeding device includes a lifting frame slidably installed on the feeding box. An inclined plane is arranged in the feeding box. A turntable gear is rotatably installed on the feeding box. A rotating rod is fixedly installed on the turntable gear. A transmission belt is wound around the turntable gear. An outer rotating rod is rotatably installed on the rotating rod. The outer rotating rod is rotatably installed with the lifting frame. A closing ejector plate is fixedly installed on the lifting frame. A lower ejector post and a descending rack are fixedly installed on the lifting frame.

[0005] Further, a clamping mechanism is arranged on the transmission frame. The clamping mechanism includes a rotating seat rotatably installed on the transmission frame. A rotating gear is fixedly installed on the rotating seat. An upper clamp and a lower clamp are rotatably installed on the rotating seat. Rubber pads are arranged inside the upper clamp and the lower clamp. Torsion springs are arranged between the upper clamp and the lower clamp and the rotating seat respectively.

[0006] Place the stainless steel pipe to be bent into the feeding box. The feeding box rolls towards the closing ejector plate through the inclined plane inside the feeding box and is blocked by the closing ejector plate. The rear gear drives the turntable gear and the rotating rod to rotate through the transmission belt, thereby driving the outer rotating rod to rotate. The outer rotating rod drives the lifting frame and the closing ejector plate to descend. The descending of the lifting frame drives the lower ejector post and the descending rack to descend. The descending rack contacts the rotating gear and drives the rotating gear and the rotating seat to rotate 90 degrees to be in a vertical state. The stainless steel pipe clamped by the upper clamp and the lower clamp also turns to a vertical state. At this time, the lower ejector post contacts the stainless steel pipe clamped by the upper clamp and the lower clamp. At this time, the lower ejector post pushes the stainless steel pipe onto the pipe seat below the rotating seat. At this time, the closing ejector plate descends, causing the stainless steel pipe in contact with the closing ejector plate to roll out and be located between the feeding box and the upper clamp. Subsequently, the rotating rod continues to rotate to drive the outer rotating rod to rise, thereby driving the lifting frame and the descending rack to rise. The descending rack drives the rotating gear and the rotating seat to rotate 90 degrees. At this time, the upper clamp and the lower clamp rotate to a horizontal state. Subsequently, the closing ejector plate rises, and the stainless steel pipe between the feeding box and the upper clamp is pushed into the upper clamp and the lower clamp through the slope. The upper clamp and the lower clamp are also provided with slopes, and the upper clamp and the lower clamp will be lifted by the stainless steel pipe, and the torsion spring is twisted. When the stainless steel pipe enters between the upper clamp and the lower clamp, the torsion spring rebounds and clamps the stainless steel pipe through the upper clamp and the lower clamp. At the same time, the closing ejector plate re-closes the feeding box.

[0007] Further, the conveying device includes a driving motor. Two driving wheels are rotatably installed on the driving frame. A motor gear is fixedly installed on the motor shaft of the driving motor. A left gear is rotatably installed on the driving frame. A rear gear is fixedly installed on the left gear. A transmission belt is wound around the rear gear and the turntable gear. A right gear and a half-tooth gear are rotatably installed on the driving frame. A docking gear is fixedly installed on the half-tooth gear. The docking gear meshes with the motor gear. The half-tooth gear cooperates with the left gear. The half-tooth gear cooperates with the right gear. An eccentric push rod is rotatably installed on the driving frame. A lower gear is fixedly installed on the eccentric push rod. The lower gear meshes with the right gear. A conveyor belt is wound around the two driving wheels and the right gear. A number of pipe seats are fixedly installed on the conveyor belt.

[0008] Further, a sand feeding mechanism is provided on the driving frame. The sand feeding mechanism includes a sand feeding box fixedly installed on the driving frame. A docking sand discharging plate is slidably installed on the sand feeding box. An inner pushing frame is fixedly installed on the docking sand discharging plate. A sand discharging port is provided on the sand feeding box. Sand is contained in the sand feeding box. A sand discharging hole is provided on the docking sand discharging plate. A return spring is provided between the inner pushing frame and the sand feeding box.

[0009] Further, an unlocking mechanism is provided on the inner pushing frame. The unlocking mechanism includes an outer pushing frame fixedly installed on the inner pushing frame. An outer pushing track is fixedly installed on the driving frame. The outer pushing track is slidably installed on the driving frame. An outer pushing spring is provided between the outer pushing frame and the outer pushing track. A left and right trapezoidal block is slidably installed on the outer pushing frame. A left and right spring is provided between the left and right trapezoidal block and the outer pushing frame.

[0010] Further, a capping mechanism is provided on the transmission frame. The capping mechanism includes a cover inlet frame slidably mounted on the transmission frame. A fixed trapezoidal block is fixedly mounted on the cover inlet frame. The cover inlet frame cooperates with an eccentric push rod. An inlet cover box is fixedly mounted on the transmission frame. The cover inlet frame is slidably mounted with the inlet cover box. A cover pressing column is fixedly mounted on the cover inlet frame. A cover pressing spring is provided between the cover inlet frame and the inlet cover box. A slope is provided in the inlet cover box. The pipe cover is placed into the inlet cover box. After being placed, it is located below the cover pressing column. In the initial state, the cover pressing spring is in a compressed state, and the left and right trapezoidal blocks are located below the fixed trapezoidal block.

[0011] The driving motor rotates to drive the motor gear to rotate, thereby driving the docking gear and the half gear to rotate. The half gear drives the left gear and the rear gear to rotate. When the half gear meshes with the left gear, the half gear does not mesh with the right gear. When the half gear meshes with the right gear, the half gear does not mesh with the left gear. When the half gear meshes with the right gear, it drives the right gear to rotate, thereby driving the lower gear and the eccentric push rod to rotate. The rotation of the right gear drives the conveyor belt to move, thereby driving the pipe seat to move. The pipe seat drives the stainless steel pipe to move. When the pipe seat drives the stainless steel pipe to contact the inner pushing frame, the stainless steel pipe pushes the inner pushing frame and the docking sand discharging plate to slide along the sand inlet box. The return spring is compressed. At this time, the sand outlet on the docking sand discharging plate is aligned with the sand outlet. At this time, the half gear just disengages from the right gear. At this time, the conveyor belt and the pipe seat do not move. The sand in the sand inlet box falls into the stainless steel pipe just below the sand outlet through the sand outlet and the sand outlet of the docking sand discharging plate. When the inner pushing frame is pushed, it will push the outer pushing frame to slide along the outer pushing track. The outer pushing spring is compressed, thereby driving the left and right trapezoidal blocks to leave below the fixed trapezoidal block. When the left and right trapezoidal blocks leave below the fixed trapezoidal block, the originally compressed cover pressing spring rebounds, driving the cover inlet frame and the cover pressing column to descend, and pressing the pipe cover into the previous stainless steel pipe that has been filled with sand through the cover pressing column. At this time, the eccentric push rod is in the lower position. And when the stainless steel pipe disengages from the inner pushing frame, the return spring rebounds, driving the left and right trapezoidal blocks to return to their positions. At this time, the fixed trapezoidal block is located below the left and right trapezoidal blocks. Subsequently, the half gear starts to mesh with the left gear, driving the rear gear to rotate, placing the next stainless steel pipe on the pipe seat. Subsequently, the half gear disengages from the left gear, and the half gear continues to drive the right gear to rotate. The right gear continues to drive the conveyor belt to rotate. At the same time, the lower gear and the eccentric push rod rotate to lift the cover inlet frame, thereby driving the cover inlet frame and the fixed trapezoidal block to rise. When the fixed trapezoidal block rises, it will compress the cover pressing spring. The fixed trapezoidal block pushes the left and right trapezoidal blocks outwards. The left and right springs are compressed. When the fixed trapezoidal block passes through the left and right trapezoidal blocks, the left and right springs rebound, and the left and right trapezoidal blocks reach below the fixed trapezoidal block, causing the fixed trapezoidal block to return to the initial state and the cover pressing spring to return to the compressed state.

[0012] Further, the bending device includes an electric cylinder fixedly installed on the electric cylinder frame. A push plate and a short bending block are slidably installed on the electric cylinder frame. A push plate spring is arranged between the short bending block and the push plate. A lower rack is fixedly installed on the push plate.

[0013] Further, a bending frame is fixedly installed on the transmission frame. A long bending frame is slidably installed on the bending frame. A transfer gear is rotatably installed on the bending frame. A bending rack is fixedly installed on the long bending frame. The bending rack meshes with the transfer gear, and the lower rack meshes with the transfer gear.

[0014] When the pipe seat drives the stainless steel pipe after being filled with sand and the pipe cap to reach between the short bending block and the long bending frame, at this time, the half-tooth gear disengages from the right gear. The electric cylinder extends to drive the push plate to slide along the electric cylinder frame. The electric cylinder frame drives the short bending block to slide along the electric cylinder frame through the push plate spring. The short bending block contacts the stainless steel pipe. At the same time, the movement of the push plate will drive the lower rack to move, thereby driving the transfer gear to rotate. The transfer gear drives the bending rack and the long bending frame to slide towards the stainless steel pipe. As the push plate continues to move forward, the push plate spring will be compressed, and the stainless steel pipe is bent by the long bending frame and the short bending block.

[0015] When the half-tooth gear meshes with the left gear, the conveyor belt does not move. The torsion spring pushes the stainless steel pipe downward onto the turntable gear. At the same time, the closing ejector plate pushes the next steel pipe into the upper clamp and the lower clamp. And the sand in the sand inlet box enters the stainless steel pipe below the sand outlet. At the same time, the capping column pushes the pipe cap into the stainless steel pipe below it. At the same time, the long bending frame and the short bending block bend the stainless steel pipe located between the long bending frame and the short bending block; when the half-tooth gear meshes with the right gear, the conveyor belt drives the pipe seat to move, and at the same time, the eccentric push rod drives the cover feeding frame to rise and reset.

[0016] The beneficial effects of the present invention compared with the prior art are as follows: (1) The pipe feeding device provided by the present invention can achieve feeding one stainless steel pipe each time, automatically adjust the posture of the stainless steel pipe and then insert the stainless steel pipe onto the pipe seat. The whole process is coordinated with the subsequent bending processing work process of the stainless steel pipe, and the automation degree is high; (2) The conveying device provided by the present invention can drive the stainless steel pipe to be conveyed, and realize automatic sand injection, capping and bending and other actions on the stainless steel pipe. All processes are carried out synchronously. When the operation action is performed, the conveyor belt stops rotating, and the automation degree is high; (3) The bending device provided by the present invention bends the stainless steel pipe by driving the short bending block and the long bending block to move towards the stainless steel pipe at the same time. And before the stainless steel pipe is bent, sand and a lid have been installed inside, reducing the deformation of the stainless steel pipe during bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2Schematic diagram of the pipe inlet device of the present invention Figure 1 ;

[0019] Figure 3 Schematic diagram of the pipe inlet device of the present invention Figure 2 ;

[0020] Figure 4 For the present invention Figure 3 Partial enlarged schematic diagram at position A in the present invention;

[0021] Figure 5 Schematic diagram of the conveying device of the present invention Figure 1 ;

[0022] Figure 6 Schematic diagram of the conveying device of the present invention Figure 2 ;

[0023] Figure 7 For the present invention Figure 6 Partial enlarged schematic diagram at position B in the present invention;

[0024] Figure 8 Schematic diagram of the sand inlet mechanism of the present invention;

[0025] Figure 9 Schematic diagram of the conveying device of the present invention Figure 3 ;

[0026] Figure 10 Schematic diagram of the bending device of the present invention Figure 1 ;

[0027] Figure 11 Schematic diagram of the bending device of the present invention Figure 2 .

[0028] Reference Numerals: 101 - Feed Box; 102 - Lifting Frame; 103 - Lower Jack Post; 104 - Lower Rack; 105 - Turntable Gear; 106 - Rotating Rod; 107 - Outer Rotating Rod; 108 - Transmission Belt; 109 - Rotating Seat; 110 - Rotating Gear; 111 - Upper Clamp; 112 - Lower Clamp; 113 - Torsion Spring; 114 - Closing Ejector Plate; 201 - Transmission Frame; 202 - Transmission Motor; 203 - Transmission Wheel; 204 - Conveyor Belt; 205 - Pipe Seat; 206 - Sand Inlet Box; 207 - Cover Inlet Box; 208 - Cover Inlet Frame; 209 - Cover Pressing Post; 210 - Cover Pressing Spring; 211 - Pipe Cover; 212 - Inner Pushing Frame; 213 - Docking Sand Outlet Plate; 214 - Sand Outlet; 215 - Return Spring; 216 - Motor Gear; 217 - Docking Gear; 218 - Half Tooth Gear; 219 - Left Gear; 220 - Rear Gear; 221 - Right Gear; 222 - Lower Gear; 223 - Eccentric Push Rod; 224 - Fixed Trapezoidal Block; 225 - Outer Pushing Frame; 226 - Outer Pushing Track; 227 - Outer Pushing Spring; 228 - Left - Right Trapezoidal Block; 229 - Left - Right Spring; 301 - Electric Cylinder Frame; 302 - Electric Cylinder; 303 - Push Plate; 304 - Push Plate Spring; 305 - Short Bending Block; 306 - Bending Frame; 307 - Long Bending Frame; 308 - Bending Rack; 309 - Intermediate Gear; 310 - Lower Rack. Detailed Embodiments

[0029] The following further describes the detailed embodiments of the present invention with reference to the accompanying drawings.

[0030] Embodiment: Refer to Figures 1 - 11 , an automatic bending device for stainless steel pipes, including a pipe feeding device. The pipe feeding device includes a feed box 101. A conveying device is provided on the pipe feeding device. The conveying device includes a transmission frame 201. The conveying device is used to drive the stainless steel pipe to move. A bending device is provided on the conveying device. The bending device includes an electric cylinder frame 301. The electric cylinder frame 301 is fixedly installed on the transmission frame 201. The bending device is used to bend the stainless steel pipe.

[0031] As Figures 2 - 4 shown, the pipe feeding device includes a lifting frame 102 slidably installed on the feed box 101. An inclined surface is provided inside the feed box 101. A turntable gear 105 is rotatably installed on the feed box 101. A rotating rod 106 is fixedly installed on the turntable gear 105. A transmission belt 108 is wound around the turntable gear 105. An outer rotating rod 107 is rotatably installed on the rotating rod 106. The outer rotating rod 107 is rotatably installed with the lifting frame 102. A closing ejector plate 114 is fixedly installed on the lifting frame 102. A lower jack post 103 and a lower rack 104 are fixedly installed on the lifting frame 102.

[0032] As Figures 2 - 4As shown in the figure, a clamping mechanism is provided on the transmission frame 201. The clamping mechanism includes a rotating seat 109 rotatably mounted on the transmission frame 201. A rotating gear 110 is fixedly mounted on the rotating seat 109. An upper clamp 111 and a lower clamp 112 are rotatably mounted on the rotating seat 109. Rubber pads are provided inside the lower clamp 112 and the lower clamp 112. Torsion springs 113 are provided between the upper clamp 111 and the lower clamp 112 and the rotating seat 109 respectively.

[0033] Place the stainless steel pipe to be bent into the feeding box 101. The feeding box 101 rolls along the inclined plane inside the feeding box 101 towards the closing ejector plate 114 and is blocked by the closing ejector plate 114. The rear gear 220 drives the turntable gear 105 and the rotating rod 106 to rotate through the transmission belt 108, thereby driving the outer rotating rod 107 to rotate. The outer rotating rod 107 drives the lifting frame 102 and the closing ejector plate 114 to descend. The descent of the lifting frame 102 drives the lower ejector post 103 and the descending rack 104 to descend. The descending rack 104 contacts the rotating gear 110, driving the rotating gear 110 and the rotating seat 109 to rotate 90 degrees to a vertical state. The stainless steel pipe clamped by the upper clamp 111 and the lower clamp 112 also turns to a vertical state. At this time, the lower ejector post 103 contacts the stainless steel pipe clamped by the upper clamp 111 and the lower clamp 112. At this time, the lower ejector post 103 pushes the stainless steel pipe onto the pipe seat 205 below the rotating seat 109. At this time, the closing ejector plate 114 descends, causing the stainless steel pipe in contact with the closing ejector plate 114 to roll out and be located between the feeding box 101 and the upper clamp 111. Subsequently, the rotating rod 106 continues to rotate to drive the outer rotating rod 107 to rise, thereby driving the lifting frame 102 and the descending rack 104 to rise. The descending rack 104 drives the rotating gear 110 and the rotating seat 109 to rotate 90 degrees. At this time, the upper clamp 111 and the lower clamp 112 rotate to a horizontal state. Subsequently, the closing ejector plate 114 rises, and the stainless steel pipe between the feeding box 101 and the upper clamp 111 is pushed into the upper clamp 111 and the lower clamp 112 through the slope. The upper clamp 111 and the lower clamp 112 are also provided with slopes. The upper clamp 111 and the lower clamp 112 will be lifted by the stainless steel pipe, and the torsion spring 113 is twisted. When the stainless steel pipe enters between the upper clamp 111 and the lower clamp 112, the torsion spring 113 rebounds, clamping the stainless steel pipe through the upper clamp 111 and the lower clamp 112. At the same time, the closing ejector plate 114 re-closes the feeding box 101.

[0034] As Figures 5 - 9As shown, the conveying device includes a driving motor 202. Two driving wheels 203 are rotatably installed on the driving frame 201. A motor gear 216 is fixedly installed on the motor shaft of the driving motor 202. A left gear 219 is rotatably installed on the driving frame 201. A rear gear 220 is fixedly installed on the left gear 219. A transmission belt 108 is wound around the rear gear 220 and the turntable gear 105. A right gear 221 and a half-tooth gear 218 are rotatably installed on the driving frame 201. A docking gear 217 is fixedly installed on the half-tooth gear 218. The docking gear 217 meshes with the motor gear 216. The half-tooth gear 218 cooperates with the left gear 219. The half-tooth gear 218 cooperates with the right gear 221. An eccentric push rod 223 is rotatably installed on the driving frame 201. A lower gear 222 is fixedly installed on the eccentric push rod 223. The lower gear 222 meshes with the right gear 221. A conveyor belt 204 is wound around the two driving wheels 203 and the right gear 221. A number of pipe seats 205 are fixedly installed on the conveyor belt 204.

[0035] As Figures 5 - 9 As shown, a sand inlet mechanism is provided on the driving frame 201. The sand inlet mechanism includes a sand inlet box 206 fixedly installed on the driving frame 201. A docking sand outlet plate 213 is slidably installed on the sand inlet box 206. An inner push frame 212 is fixedly installed on the docking sand outlet plate 213. A sand outlet 214 is provided on the sand inlet box 206. Sand is contained in the sand inlet box 206. A sand outlet hole is provided on the docking sand outlet plate 213. A return spring 215 is provided between the inner push frame 212 and the sand inlet box 206.

[0036] As Figures 5 - 9 As shown, an unlocking mechanism is provided on the inner push frame 212. The unlocking mechanism includes an outer push frame 225 fixedly installed on the inner push frame 212. An outer push track 226 is fixedly installed on the driving frame 201. The outer push track 226 is slidably installed on the driving frame 201. An outer push spring 227 is provided between the outer push frame 225 and the outer push track 226. A left and right trapezoidal block 228 is slidably installed on the outer push frame 225. A left and right spring 229 is provided between the left and right trapezoidal block 228 and the outer push frame 225.

[0037] As Figures 5 - 9As shown in the figure, a capping mechanism is provided on the drive frame 201. The capping mechanism includes a cap feeding frame 208 slidably mounted on the drive frame 201. A fixed trapezoidal block 224 is fixedly mounted on the cap feeding frame 208. The cap feeding frame 208 cooperates with an eccentric push rod 223. An inlet cap box 207 is fixedly mounted on the drive frame 201. The cap feeding frame 208 is slidably mounted with the inlet cap box 207. A cap pressing column 209 is fixedly mounted on the cap feeding frame 208. A cap pressing spring 210 is provided between the cap feeding frame 208 and the inlet cap box 207. A slope is provided inside the inlet cap box 207. The pipe cap 211 is placed into the inlet cap box 207. After the pipe cap 211 is placed, it is located below the cap pressing column 209. In the initial state, the cap pressing spring 210 is in a compressed state, and the left and right trapezoidal blocks 228 are located below the fixed trapezoidal block 224.

[0038] The driving motor 202 rotates to drive the motor gear 216 to rotate, thereby driving the docking gear 217 and the half-tooth gear 218 to rotate. The half-tooth gear 218 drives the left gear 219 and the rear gear 220 to rotate. When the half-tooth gear 218 meshes with the left gear 219, the half-tooth gear 218 does not mesh with the right gear 221. When the half-tooth gear 218 meshes with the right gear 221, the half-tooth gear 218 does not mesh with the left gear 219. When the half-tooth gear 218 meshes with the right gear 221, it drives the right gear 221 to rotate, thereby driving the lower gear 222 and the eccentric push rod 223 to rotate. The rotation of the right gear 221 drives the conveyor belt 204 to move, thereby driving the pipe seat 205 to move. The pipe seat 205 drives the stainless steel pipe to move. When the pipe seat 205 with the stainless steel pipe contacts the inner push frame 212, the stainless steel pipe pushes the inner push frame 212 and the docking sand outlet plate 213 to slide along the sand inlet box 206, and the return spring 215 is compressed. At this time, the sand outlet on the docking sand outlet plate 213 is aligned with the sand outlet 214. At this time, the half-tooth gear 218 just disengages from the right gear 221. At this time, the conveyor belt 204 and the pipe seat 205 do not move, and the sand in the sand inlet box 206 falls into the stainless steel pipe just below the sand outlet 214 through the sand outlet 214 and the sand outlet on the docking sand outlet plate 213. When the inner push frame 212 is pushed, it will push the outer push frame 225 to slide along the outer push track 226, and the outer push spring 227 is compressed, thereby driving the left and right trapezoidal blocks 228 to leave below the fixed trapezoidal block 224. When the left and right trapezoidal blocks 228 leave below the fixed trapezoidal block 224, the gland spring 210 that was originally in a compressed state rebounds, driving the gland frame 208 and the gland column 209 to descend, and pressing the pipe cap 211 into the previous stainless steel pipe that has been filled with sand through the gland column 209. At this time, the eccentric push rod 223 is at the lower position, and when the stainless steel pipe disengages from the inner push frame 212, the return spring 215 rebounds, driving the left and right trapezoidal blocks 228 to return to their positions. At this time, the fixed trapezoidal block 224 is located below the left and right trapezoidal blocks 228. Subsequently, the half-tooth gear 218 starts to mesh with the left gear 219, driving the rear gear 220 to rotate, and placing the next stainless steel pipe on the pipe seat 205. Subsequently, the half-tooth gear 218 disengages from the left gear 219, and the half-tooth gear 218 continues to drive the right gear 221 to rotate. The right gear 221 continues to drive the conveyor belt 204 to rotate, and at the same time, the lower gear 222 and the eccentric push rod 223 rotate to lift the gland frame 208, thereby driving the gland frame 208 and the fixed trapezoidal block 224 to rise. When the fixed trapezoidal block 224 rises, it will compress the gland spring 210. The fixed trapezoidal block 224 pushes the left and right trapezoidal blocks 228 outwards, and the left and right springs 229 are compressed. When the fixed trapezoidal block 224 passes through the left and right trapezoidal blocks 228, the left and right springs 229 rebound, and the left and right trapezoidal blocks 228 reach below the fixed trapezoidal block 224, causing the fixed trapezoidal block 224 to return to its initial state and the gland spring 210 to return to its compressed state.

[0039] Such as Figure 10 、Figure 11 As shown in the figure, the bending device includes an electric cylinder 302 fixedly installed on the electric cylinder frame 301. A push plate 303 and a short bending block 305 are slidably installed on the electric cylinder frame 301. A push plate spring 304 is arranged between the short bending block 305 and the push plate 303. A lower rack 310 is fixedly installed on the push plate 303.

[0040] As Figure 10 、 Figure 11 shown in the figure, a bending frame 306 is fixedly installed on the transmission frame 201. A long bending frame 307 is slidably installed on the bending frame 306. A transfer gear 309 is rotatably installed on the bending frame 306. A bending rack 308 is fixedly installed on the long bending frame 307. The bending rack 308 meshes with the transfer gear 309, and the lower rack 310 meshes with the transfer gear 309.

[0041] When the pipe seat 205 drives the stainless steel pipe filled with sand and the pipe cap 211 to reach between the short bending block 305 and the long bending frame 307, at this time, the half-tooth gear 218 disengages from the right gear 221. The electric cylinder 302 extends to drive the push plate 303 to slide along the electric cylinder frame 301. The electric cylinder frame 301 drives the short bending block 305 to slide along the electric cylinder frame 301 through the push plate spring 304. The short bending block 305 contacts the stainless steel pipe. At the same time, the movement of the push plate 303 will drive the lower rack 310 to move, thereby driving the transfer gear 309 to rotate. The transfer gear 309 drives the bending rack 308 and the long bending frame 307 to slide towards the stainless steel pipe. As the push plate 303 continues to move forward, the push plate spring 304 will be compressed, and the stainless steel pipe is bent by the long bending frame 307 and the short bending block 305.

[0042] When the half-tooth gear 218 meshes with the left gear 219, the conveyor belt 204 does not move. The torsion spring 113 pushes the stainless steel pipe down onto the turntable gear 105. At the same time, the closing ejector plate 114 pushes the next steel pipe into the upper clamp 111 and the lower clamp 112. And the sand in the sand inlet box 206 enters the stainless steel pipe below the sand outlet 214. At the same time, the gland post 209 pushes the pipe cap 211 into the stainless steel pipe below it. At the same time, the long bending frame 307 and the short bending block 305 bend the stainless steel pipe located between the long bending frame 307 and the short bending block 305; when the half-tooth gear 218 meshes with the right gear 221, the conveyor belt 204 drives the pipe seat 205 to move, and at the same time, the eccentric push rod 223 drives the cap feeding frame 208 to rise and reset.

[0043] The working principle of the automatic bending device for stainless steel pipes disclosed in the present invention is as follows: the stainless steel pipe to be bent is placed in the feed box 101, the feed box 101 rolls toward the closed ejection plate 114 through the inclined surface in the feed box 101, and is blocked by the closed ejection plate 114, the transmission motor 202 rotates to drive the motor gear 216 to rotate, thereby driving the docking gear 217 and the half-tooth gear 218 to rotate, the half-tooth gear 218 drives the left gear 219 and the rear gear 220 to rotate, and the rear gear 220 drives the turntable gear 105 through the transmission belt 108 The outer rotating rod 107 is driven to rotate, and the outer rotating rod 107 drives the lifting frame 102 and the closing ejector plate 114 to descend. The lowering of the lifting frame 102 drives the lower ejector column 103 and the descending rack 104 to descend. The descending rack 104 contacts the rotating gear 110, drives the rotating gear 110 and the rotating seat 109 to rotate 90 degrees to a vertical state, and the stainless steel pipe clamped by the upper clamp 111 and the lower clamp 112 is also turned to a vertical state. At this time, the lower ejector column 103 and the stainless steel pipe clamped by the upper clamp 111 and the lower clamp 112 are The lower push column 103 pushes the stainless steel pipe onto the pipe seat 205 below the rotating seat 109. At this time, the closed ejector plate 114 descends, so that the stainless steel pipe in contact with the closed ejector plate 114 rolls out and is located between the feed box 101 and the upper clamp 111. Then the rotating rod 106 continues to rotate to drive the outer rotating rod 107 to rise, thereby driving the lifting frame 102 and the descending rack 104 to rise. The descending rack 104 drives the rotating gear 110 and the rotating seat 109 to rotate 90 degrees. At this time, the upper clamp 111 and the lower clamp 112 rotate to a horizontal state. The ejector plate 114 is then closed and raised, and the stainless steel tube between the feed box 101 and the upper clamp 111 is pushed into the upper clamp 111 and the lower clamp 112 through the slope. The upper clamp 111 and the lower clamp 112 are also provided with slopes. The upper clamp 111 and the lower clamp 112 will be lifted up by the stainless steel tube, and the torsion spring 113 is twisted. When the stainless steel tube enters between the upper clamp 111 and the lower clamp 112, the torsion spring 113 rebounds, and the stainless steel tube is clamped by the upper clamp 111 and the lower clamp 112. At the same time, the ejector plate 114 is closed to reclose the feed box 101.The drive motor 202 rotates to drive the motor gear 216 to rotate, thereby driving the docking gear 217 and the half-tooth gear 218 to rotate. The half-tooth gear 218 drives the left gear 219 and the rear gear 220 to rotate. When the half-tooth gear 218 meshes with the left gear 219, the half-tooth gear 218 does not mesh with the right gear 221. When the half-tooth gear 218 meshes with the right gear 221, the half-tooth gear 218 does not mesh with the left gear 219. When the half-tooth gear 218 meshes with the right gear 221, it drives the right gear 221 to rotate, thereby driving the lower gear 222 and the eccentric push rod 223 to rotate. The rotation of the right gear 221 drives the conveyor belt 204 to move, thereby driving the pipe seat 205 to move. The pipe seat 205 drives the stainless steel pipe to move. When the pipe seat 205 drives the stainless steel pipe to contact the inner push frame 212, the stainless steel pipe pushes the inner push frame 212 and the docking sand discharge plate 213 to slide along the sand inlet box 206, and the return spring 215 is compressed. At this time, the sand discharge port on the docking sand discharge plate 213 is aligned with the sand discharge port 214. At this time, the half-tooth gear 218 just disengages from the right gear 221. At this time, the conveyor belt 204 and the pipe seat 205 do not move. The sand in the sand inlet box 206 falls into the stainless steel pipe just below the sand discharge port 214 through the sand discharge port 214 and the sand discharge port of the docking sand discharge plate 213. When the inner push frame 212 is pushed, it will push the outer push frame 225 to slide along the outer push track 226, and the outer push spring 227 is compressed, thereby driving the left and right trapezoidal blocks 228 to leave below the fixed trapezoidal block 224. When the left and right trapezoidal blocks 228 leave below the fixed trapezoidal block 224, the gland spring 210 that was originally in a compressed state rebounds, driving the gland frame 208 and the gland column 209 to descend, and pressing the pipe cap 211 into the previous stainless steel pipe that has been filled with sand through the gland column 209. At this time, the eccentric push rod 223 is at the lower position, and when the stainless steel pipe disengages from the inner push frame 212, the return spring 215 rebounds, driving the left and right trapezoidal blocks 228 to return to their positions. At this time, the fixed trapezoidal block 224 is located below the left and right trapezoidal blocks 228. Subsequently, the half-tooth gear 218 starts to mesh with the left gear 219, driving the rear gear 220 to rotate, placing the next stainless steel pipe on the pipe seat 205. Subsequently, the half-tooth gear 218 disengages from the left gear 219, and the half-tooth gear 218 continues to drive the right gear 221 to rotate. The right gear 221 continues to drive the conveyor belt 204 to rotate. At the same time, the lower gear 222 and the eccentric push rod 223 rotate to lift the gland frame 208, thereby driving the gland frame 208 and the fixed trapezoidal block 224 to rise. When the fixed trapezoidal block 224 rises, it will compress the gland spring 210. The fixed trapezoidal block 224 pushes the left and right trapezoidal blocks 228 outwards, and the left and right springs 229 are compressed. When the fixed trapezoidal block 224 passes through the left and right trapezoidal blocks 228, the left and right springs 229 rebound, and the left and right trapezoidal blocks 228 reach below the fixed trapezoidal block 224, causing the fixed trapezoidal block 224 to return to its initial state and the gland spring 210 to return to its compressed state.When the pipe socket 205 arrives between the short bending block 305 and the long bending frame 307 with the stainless steel pipe filled with sand and the pipe cap 211, at this time, the half-tooth gear 218 disengages from the right gear 221. The electric cylinder 302 extends to drive the push plate 303 to slide along the electric cylinder frame 301. The electric cylinder frame 301 drives the short bending block 305 to slide along the electric cylinder frame 301 through the push plate spring 304. The short bending block 305 contacts the stainless steel pipe. At the same time, the movement of the push plate 303 will drive the lower rack 310 to move, thereby driving the intermediate gear 309 to rotate. The intermediate gear 309 drives the bending rack 308 and the long bending frame 307 to slide towards the stainless steel pipe. As the push plate 303 continues to advance, the push plate spring 304 will be compressed, and the stainless steel pipe is bent by the long bending frame 307 and the short bending block 305.

[0044] That is, when the half-tooth gear 218 meshes with the left gear 219, the conveyor belt 204 does not move. The torsion spring 113 pushes the stainless steel pipe downward onto the turntable gear 105. At the same time, the closing ejector plate 114 pushes the next steel pipe into the upper clamp 111 and the lower clamp 112. And the sand in the sand inlet box 206 enters the stainless steel pipe below the sand outlet 214. At the same time, the gland post 209 pushes the pipe cap 211 into the stainless steel pipe below it. At the same time, the long bending frame 307 and the short bending block 305 bend the stainless steel pipe located between the long bending frame 307 and the short bending block 305; when the half-tooth gear 218 meshes with the right gear 221, the conveyor belt 204 drives the pipe socket 205 to move, and at the same time, the eccentric push rod 223 drives the cap feeding frame 208 to rise and reset.

[0045] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope of the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An automatic stainless steel tube bending device, comprising a tube feeding device, characterized in that: The tube feeding device comprises a feed box (101), a conveying device is arranged on the tube feeding device, the conveying device comprises a transmission frame (201), the conveying device is used to drive the stainless steel tube to move, the conveying device is provided with a bending device, the bending device comprises an electric cylinder frame (301), the electric cylinder frame (301) is fixedly mounted on the transmission frame (201), an eccentric push rod (223) is rotatably mounted on the transmission frame (201), and the bending device is used to bend the stainless steel tube; The transmission frame (201) is provided with a sand feeding mechanism, and the sand feeding mechanism comprises a sand feeding box (206) fixedly mounted on the transmission frame (201); a sand outlet plate (213) is slidably mounted on the sand feeding box (206); an inner push frame (212) is fixedly mounted on the sand outlet plate (213); a sand outlet (214) is provided on the sand feeding box (206); the sand feeding box (206) is filled with sand; a sand outlet hole is provided on the sand outlet plate (213); and a return spring (215) is provided between the inner push frame (212) and the sand feeding box (206); The transmission frame (201) is provided with a capping mechanism, the capping mechanism comprising a capping frame (208) slidably mounted on the transmission frame (201), a fixed trapezoidal block (224) fixedly mounted on the capping frame (208), the capping frame (208) cooperating with an eccentric push rod (223), a capping box (207) fixedly mounted on the transmission frame (201), the capping frame (208) and the capping box (207) slidably mounted, a capping column (209) fixedly mounted on the capping frame (208), a capping spring (210) being arranged between the capping frame (208) and the capping box (207), a slope being arranged inside the capping box (207), the tube cap (211) being placed from the capping box (207), the tube cap (211) being located below the capping column (209) after being placed, and the capping spring (210) being in a compressed state in an initial state; The pipe feeding device comprises a lifting frame (102) slidably mounted on a feed box (101), an inclined surface is arranged inside the feed box (101), a turntable gear (105) is rotatably mounted on the feed box (101), a rotating rod (106) is fixedly mounted on the turntable gear (105), a transmission belt (108) is wound around the outside of the turntable gear (105), an outer rotating rod (107) is rotatably mounted on the rotating rod (106), the outer rotating rod (107) is rotatably mounted on the lifting frame (102), a closing ejection plate (114) is fixedly mounted on the lifting frame (102), and a lower ejector column (103) and a descending rack (104) are fixedly mounted on the lifting frame (102); The transmission frame (201) is provided with a clamping mechanism, the clamping mechanism comprising a rotating seat (109) rotatably mounted on the transmission frame (201), a rotating gear (110) fixedly mounted on the rotating seat (109), an upper clamp (111) and a lower clamp (112) rotatably mounted on the rotating seat (109), rubber pads being arranged inside the lower clamp (112), and torsion springs (113) being arranged between the upper clamp (111) and the lower clamp (112) and the rotating seat (109), respectively.

2. The automatic stainless steel pipe bending device according to claim 1, characterized in that: The conveying device comprises a transmission motor (202), two transmission wheels (203) are rotatably mounted on a transmission frame (201), a motor gear (216) is fixedly mounted on the motor shaft of the transmission motor (202), a left gear (219) is rotatably mounted on the transmission frame (201), a rear gear (220) is fixedly mounted on the left gear (219), a transmission belt (108) is wound around the rear gear (220) and the turntable gear (105), a right gear (221) and a half-tooth gear (218) are rotatably mounted on the transmission frame (201), and the half-tooth gear (218) is fixedly mounted on the left gear (219). A docking gear (217) is fixedly mounted on the wheel (218), the docking gear (217) meshes with the motor gear (216), the half-toothed gear (218) cooperates with the left gear (219), the half-toothed gear (218) cooperates with the right gear (221), a lower gear (222) is fixedly mounted on the eccentric push rod (223), the lower gear (222) meshes with the right gear (221), a conveyor belt (204) is wound around the two transmission wheels (203) and the right gear (221), and a plurality of pipe seats (205) are fixedly mounted on the conveyor belt (204).

3. The automatic stainless steel pipe bending device according to claim 2 is characterized in that: The inner push frame (212) is provided with an unlocking mechanism, and the unlocking mechanism comprises an outer push frame (225) fixedly mounted on the inner push frame (212); an outer push track (226) is fixedly mounted on the transmission frame (201); the outer push track (226) and the transmission frame (201) are slidably mounted; an outer push spring (227) is arranged between the outer push frame (225) and the outer push track (226); left and right trapezoidal blocks (228) are slidably mounted on the outer push frame (225); left and right springs (229) are arranged between the left and right trapezoidal blocks (228) and the outer push frame (225); and the left and right trapezoidal blocks (228) are located below the fixed trapezoidal block (224).

4. The automatic stainless steel pipe bending device according to claim 1, characterized in that: The bending device comprises an electric cylinder (302) fixedly mounted on an electric cylinder frame (301); a push plate (303) and a short bending block (305) are slidably mounted on the electric cylinder frame (301); a push plate spring (304) is provided between the short bending block (305) and the push plate (303); and a lower rack (310) is fixedly mounted on the push plate (303).

5. The automatic stainless steel pipe bending device according to claim 4 is characterized in that: A bending frame (306) is fixedly mounted on the transmission frame (201), a long bending frame (307) is slidably mounted on the bending frame (306), a transfer gear (309) is rotatably mounted on the bending frame (306), a bending rack (308) is fixedly mounted on the long bending frame (307), the bending rack (308) is meshed with the transfer gear (309), and the lower rack (310) is meshed with the transfer gear (309).

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