An automatic assembling device for PVC pipes

Abstract

The present invention relates to the technical field of sanitary ware product production, and discloses a self-assembly device for PVC pipes. A self-assembly device for PVC pipes is characterized in that it includes a frame, and a feeding mechanism, a sleeve assembly mechanism, a bell mouth assembly mechanism, a core assembly mechanism, an inner expansion mechanism, a leak testing mechanism, a discharging mechanism and a handling mechanism are arranged on the frame. The handling mechanism is used to sequentially convey the PVC pipes from the feeding mechanism through the sleeve assembly mechanism, the bell mouth assembly mechanism, the core assembly mechanism, the inner expansion mechanism, the leak testing mechanism and the discharging mechanism. The inner expansion mechanism is used to press down the end of the inner-expanded PVC pipe, and the leak testing mechanism is used for leak testing of the PVC pipes. The present invention can complete the assembly of PVC pipes with high efficiency, which is beneficial to improving the production efficiency of the factory.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary ware product production, and particularly to a self-assembly device for PVC pipes. Background Art

[0002] A flexible rubber hose is a type of tubular rubber product used for transporting gases, liquids, slurry, or granular materials. It consists of an inner and outer rubber layer and a skeleton layer, and the material of the skeleton layer can be cotton fiber, various synthetic fibers, carbon fiber, asbestos, steel wire, etc.

[0003] During the processing and production of flexible rubber hoses, it is necessary to assemble and fit envelopes, bell mouths, and inner cores (as shown in the attachment Figure 22 ). Existing devices (such as the patent CN201922094866.4 previously applied for by the applicant) are difficult to perform fully automatic machine operations on the assembly steps of envelopes, bell mouths, and inner cores. At the same time, after the inner core is installed, the prior art requires another inner expansion machine to expand the equipment, and the compatibility between the machines is relatively poor, making it impossible to achieve fully automatic production, affecting production efficiency and having a higher equipment cost. Summary of the Invention

[0004] Therefore, it is necessary to provide a self-assembly device for PVC pipes to solve the problems that existing PVC pipes cannot be fully automatically assembled with envelopes, bell mouths, and inner cores, and the compatibility between the assembly device and the inner expansion device is poor.

[0005] To achieve the above object, the present invention provides a self-assembly device for PVC pipes, including a frame, on which are provided a feeding mechanism, an envelope assembly mechanism, a bell mouth assembly mechanism, an inner core assembly mechanism, an inner expansion mechanism, a leak test mechanism, a discharging mechanism, and a handling mechanism.

[0006] The handling mechanism is used to sequentially transport the PVC pipes from the feeding mechanism through the envelope assembly mechanism, the bell mouth assembly mechanism, the inner core assembly mechanism, the inner expansion mechanism, the leak test mechanism, and the discharging mechanism. The feeding mechanism is used to transport the PVC pipes to the starting end of the handling mechanism; the envelope assembly mechanism, the bell mouth assembly mechanism, and the inner core assembly mechanism are respectively used to assemble envelopes, bell mouths, and inner cores on the PVC pipes. The inner expansion mechanism is used to press down the end of the inner-expanded PVC pipe, and the leak test mechanism is used to perform a leak test on the PVC pipe.

[0007] Further, the bell mouth assembly mechanism includes a bell mouth installation robot, a bell mouth clamping module, and a bell mouth conveying module. The bell mouth clamping module includes two relatively arranged bell mouth assembly jigs, and the two bell mouth assembly jigs are respectively located on both sides of the handling mechanism.

[0008] The bellmouth conveying module includes a bellmouth conveying support frame, a bellmouth conveying lifting frame, a bellmouth conveying sliding track, and a lifting frame driving cylinder. A plurality of bellmouth placement trays are arranged on the bellmouth conveying lifting frame. The bellmouth conveying sliding track is fixed on the bellmouth conveying support frame. The bellmouth conveying lifting frame and the bellmouth conveying sliding track are arranged in connection. The output shaft of the lifting frame driving cylinder is connected to the bottom of the bellmouth conveying lifting frame. The bellmouth conveying support frame is fixed with a placement tray pushing and pulling cylinder, and a placement tray pulling claw is fixed on the output shaft of the placement tray pushing and pulling cylinder. The placement tray pulling claw is used to clamp the bellmouth placement tray. The bellmouth installation robot is used to clamp and install the bellmouth on the bellmouth conveying module onto the PVC pipe.

[0009] Further, a pulling block is convexly fixed on one side of the bellmouth placement tray close to the bellmouth conveying sliding track. The two ends of the pulling block are in a sharp corner structure, and the placement tray pulling claw is provided with a groove adapted to the shape of the sharp corner structure. The shape setting of the pulling block is beneficial for the placement tray pulling claw to stably grasp the bellmouth placement tray and prevent the position of the bellmouth placement tray from shifting when it is pulled.

[0010] Further, the bellmouth conveying lifting frame includes two oppositely arranged lifting plates. The inner side of the lifting plate is provided with a groove for accommodating the side edge of the bellmouth placement tray. The bottom of the lifting plate is connected to the output shaft of the lifting frame driving cylinder. This facilitates the placement of the bellmouth placement trays one by one.

[0011] Further, the bellmouth installation robot includes a robot support frame, a rotary fixing seat, a rotary connecting rod, a lift head, and a bellmouth clamping component. The rotary fixing seat is fixed on the robot support frame. The two ends of the rotary connecting rod are respectively rotatably connected to the rotary fixing seat and the lift head. The bellmouth clamping component is fixed on the output shaft of the lift head. The lift head is located above the bellmouth conveying sliding track;

[0012] The bellmouth clamping component includes a clamping connecting rod and two bellmouth claws. The middle of the clamping connecting rod is fixed to the output shaft of the lift head. The two bellmouth claws are respectively fixed at both ends of the lower surface of the clamping connecting rod. A extending rod is fixed in the middle of the bellmouth claw. The diameter of the extending rod is smaller than the diameter of the PVC pipe, and the length of the extending rod is greater than the length of the bellmouth.

[0013] During bellmouth assembly, the extending pipe passes through the bellmouth and extends into the interior of the PVC pipe, playing a role in supporting the end of the PVC pipe and preventing the end of the PVC pipe from denting inward when the bellmouth is installed at the end of the PVC pipe, which affects the quality of the product.

[0014] Further, the inner core assembly mechanism includes an inner core conveying module, an inner core assembly module, and an inner core clamping module. The inner core clamping module is used to clamp the PVC pipe. The inner core conveying module includes an inner core vibrating disk and an inner core conveying track. The inner core conveying track extends from the inner core vibrating disk to the lower part of the inner core assembly module. A transfer assembly is provided at the discharge port of the inner core conveying track. The transfer assembly includes a transfer slide rail, a horizontal sliding block, and an ejecting cylinder. The horizontal sliding block is located below the inner core assembly module. A transfer groove is provided on the horizontal sliding block and is open towards the inner core conveying track. The ejecting cylinder is located inside the transfer groove. The inner core assembly module is used to transfer and install the inner core on the transfer assembly onto the PVC.

[0015] When the inner core is conveyed to the discharge port of the inner core conveying track, the horizontal sliding block slides to make the transfer groove align with the discharge port. The inner core enters the transfer groove. Then the horizontal sliding block slides back to its original position. After that, the ejecting cylinder ejects the inner core, facilitating the inner core assembly module of the inner core assembly mechanism to pick up the inner core. The setting of the transfer assembly facilitates the picking up of inner cores one by one.

[0016] Further, the inner core clamping module includes two relatively arranged inner core clamps, which are respectively located on both sides of the handling slide rail. The inner core assembly module includes an inner core clamping vertical frame, an inner core horizontal slide rail fixed on the inner core clamping vertical frame, an inner core vertical slide rail slidably arranged on the inner core horizontal slide rail, and an inner core jaw slidably arranged on the inner core vertical slide rail. Two relatively arranged clamping pieces are fixed on the inner core jaw. The clamping pieces are used to extend into the inside of the inner core and expand the inner core.

[0017] In the present invention, since a bell mouth has been sleeved on the end of the PVC pipe, if the inner core is directly clamped, during assembly, the inner core assembly module cannot insert the inner core into the bell mouth. By using the method of using the clamping pieces to enter the inner core to support and pick up the inner core, the installation of the inner core is more stable.

[0018] Further, the inner expansion mechanism includes an inner expansion pressing-down module and an inner expansion clamping module. The inner expansion pressing-down module includes an inner expansion support frame, an inner expansion turntable, an eccentric rotating cylinder, an inner expansion pressing-down cylinder, and an inner expansion pressing-down rod. The inner expansion turntable is arranged on the inner expansion support frame. The top end of the inner expansion pressing-down rod is connected to the inner expansion turntable and the inner expansion pressing-down cylinder. The output shaft of the eccentric rotating cylinder is eccentrically connected to the inner expansion turntable. The bottom end of the inner expansion pressing-down rod is provided with an inner expansion boss, and a limiting boss is provided on the rod body of the inner expansion pressing-down rod.

[0019] The inner expansion clamping module includes an inner expansion lifting plate and a first lifting cylinder. The inner expansion lifting plate is located below the inner expansion pressing-down module. The first lifting cylinder is connected to the middle of the inner expansion lifting plate. Second lifting cylinders are provided at both ends of the inner expansion lifting plate, and inner expansion jaws are provided on the second lifting cylinders.

[0020] Furthermore, the air test mechanism includes an air test material grasping module and an inflation module. The air test material grasping module includes a reciprocating conveyor belt, a reciprocating material conveying plate arranged on the reciprocating conveyor belt, a reciprocating slide rail fixed on the reciprocating material conveying plate, and an air test gripper slidably arranged on the reciprocating slide rail. The air test gripper is used to grasp the PVC pipe after the inner expansion by the downward inner expansion of the inner expansion mechanism.

[0021] The inflation module is located on the side of the reciprocating conveyor belt. The inflation module includes an inflation support frame, an inflation head, and a pressure induction head. The inflation support frame is fixed with two groups of inflation clamping devices. Each group of inflation clamping devices includes an inflation upper gripper and an inflation lower gripper. Two inflation downward pressing cylinders are fixed on the inflation support frame. The inflation head and the pressure induction head are respectively arranged on the output shafts of the two inflation downward pressing cylinders.

[0022] Furthermore, a height fixing mechanism is arranged between the inner expansion mechanism and the air test mechanism. The height fixing mechanism includes a height fixing support plate. An upper support platform and a lower support platform are respectively fixed on the upper surface and the lower surface of the height fixing support plate. At both ends of the upper support platform, there are protruding height fixing plates and height fixing upper grippers. A height fixing cylinder is arranged on the lower support platform. A height fixing rising plate is arranged on the height fixing cylinder. At both ends of the height fixing rising plate, height fixing lower grippers are fixed. The height fixing upper grippers and the height fixing lower grippers are corresponding in position.

[0023] The above technical solution has the following beneficial effects:

[0024] In the present invention, the bell mouth assembly mechanism can complete the self-assembly of the bell mouth. At the same time, the inner expansion mechanism is compatible with the assembly equipment. After the inner core assembly is completed, the hydraulic system inner expansion mechanism is used to expand the end of the PVC pipe to increase the production efficiency. The air test mechanism detects the air tightness of the PVC pipe to ensure the yield rate of the product. Description of the Drawings

[0025] Figure 1 It is the external structure diagram of the self-assembly equipment described in the specific implementation manner;

[0026] Figure 2 It is the internal structure diagram of the self-assembly equipment described in the specific implementation manner.

[0027] Figure 3 It is the structure diagram of the feeding mechanism, the height adjustment device, and the envelope assembly mechanism described in the specific implementation manner.

[0028] Figure 4 It is the structure diagram of the feeding mechanism described in the specific implementation manner.

[0029] Figure 5 It is the structure diagram of the handling mechanism described in the specific implementation manner.

[0030] Figure 6 It is a structural diagram of the height adjustment device described in the specific implementation manner.

[0031] Figure 7 It is a structural diagram of the envelope assembly mechanism described in the specific implementation manner.

[0032] Figure 8 It is a structural diagram of the bell mouth assembly mechanism described in the specific implementation manner.

[0033] Figure 9 It is a structural diagram of the bell mouth assembly mechanism described in the specific implementation manner.

[0034] Figure 10 It is a partial structural diagram of the bell mouth placement tray described in the specific implementation manner.

[0035] Figure 11 It is a structural diagram of the bell mouth clamping component described in the specific implementation manner.

[0036] Figure 12 It is a structural diagram of the inner core assembly mechanism described in the specific implementation manner.

[0037] Figure 13 It is a partial structural diagram of the inner core assembly module described in the specific implementation manner.

[0038] Figure 14 It is a structural diagram of the inner core jaw described in the specific implementation manner.

[0039] Figure 15 It is a structural diagram of the inner expansion mechanism described in the specific implementation manner.

[0040] Figure 16 It is a structural diagram of a single inner expansion mechanism described in the specific implementation manner.

[0041] Figure 17 It is a structural diagram of the inner expansion pressing rod described in the specific implementation manner.

[0042] Figure 18 It is a structural diagram of the air test mechanism and the discharging mechanism described in the specific implementation manner.

[0043] Figure 19 It is a structural diagram of the height fixing mechanism described in the specific implementation manner.

[0044] Figure 20 It is a structural diagram of the air test material gripping module described in the specific implementation manner.

[0045] Figure 21 It is a structural diagram of the inflation module described in the specific implementation manner.

[0046] Figure 22 It is a structural diagram of the assembled PVC pipe described in the specific implementation manner.

[0047] Description of reference numerals:

[0048] 1. Feeding mechanism; 11. First conveying track; 12. Second conveying track; 13. Clamping assembly; 14. Feeding lifting assembly; 15. Feeding lowering assembly;

[0049] 2. Envelope assembling mechanism; 21. Envelope conveying module; 211. Envelope vibrating disk; 212. Envelope conveying track; 22. Envelope assembling module; 221. Envelope clamping vertical frame; 222. Envelope horizontal sliding rail; 223. Envelope vertical sliding rail; 224. Envelope gripper; 225. Envelope vertical cylinder connection; 226. Envelope horizontal cylinder connection; 23. Envelope clamping module;

[0050] 3. Bell mouth assembling mechanism; 31. Bell mouth installation robot; 311. Robot support frame; 312. Rotating fixing seat; 313. Rotating connecting rod; 314. Lifting head; 315. Bell mouth gripping assembly; 3151. Gripping connecting rod; 3152. Bell mouth gripper; 3153. Extension rod;

[0051] 32. Bell mouth clamping module; 33. Bell mouth conveying module; 331. Bell mouth conveying support frame; 332. Bell mouth conveying lifting frame; 3321. Lifting plate; 3322. Groove; 333. Bell mouth conveying sliding track; 334. Lifting frame driving cylinder; 335. Bell mouth placing plate; 336. Placing plate push-pull cylinder; 337. Placing plate pulling gripper; 338. Pulling block;

[0052] 4. Inner core assembling mechanism; 41. Inner core conveying module; 411. Inner core vibrating disk; 412. Inner core conveying track; 42. Inner core assembling module; 421. Inner core clamping vertical frame; 422. Inner core horizontal sliding rail; 423. Inner core vertical sliding rail; 424. Inner core gripper; 425. Gripping piece; 43. Inner core clamping module; 44. Transfer assembly; 441. Transfer sliding rail; 442. Horizontal sliding block; 443. Transfer groove; 444. Ejecting cylinder;

[0053] 5. Inner expansion mechanism; 51. Inner expansion pressing-down module; 511. Inner expansion support frame; 512. Inner expansion turntable; 513. Eccentric rotating cylinder; 514. Inner expansion pressing-down cylinder; 515. Inner expansion pressing-down rod; 516. Inner expansion convex platform; 517. Limit convex platform; 52. Inner expansion gripping module; 521. Inner expansion lifting plate; 522. First lifting cylinder; 523. Second lifting cylinder; 524. Inner expansion gripper;

[0054] 6. Air testing mechanism; 61. Air testing material gripping module; 611. Reciprocating conveyor belt; 612. Reciprocating material conveying plate; 613. Reciprocating slide rail; 614. Air testing gripper; 62. Inflation module; 621. Inflation support frame; 622. Inflation head; 623. Air pressure sensing head; 624. Upper inflation gripper; 625. Lower inflation gripper; 626. Lower inflation pressing cylinder;

[0055] 7. Discharging mechanism; 71. X-direction sliding track; 72. Y-direction sliding track; 73. Discharging fixture;

[0056] 8. Handling mechanism; 81. Handling slide rail; 82. Handling fixture; 83. Handling driving part;

[0057] 9. Frame;

[0058] 10. Height adjustment device; 101. Rodless cylinder; 102. Height adjustment fixture; 103. Height adjustment connecting rod;

[0059] 20. Fixed height mechanism; 201. Fixed height support plate; 202. Upper support platform; 203. Lower support platform; 204. Fixed height plate; 205. Upper fixed height gripper; 206. Fixed height cylinder; 207. Lower fixed height gripper;

[0060] 100. Envelope; 200. Inner core; 300. Bell mouth. Detailed implementation manners

[0061] To describe in detail the technical content, structural features, achieved objectives and effects of the technical solution, the following is a detailed description in conjunction with specific embodiments and with reference to the accompanying drawings.

[0062] Please refer to Figure 1-22 , a self-assembly device for PVC pipes in this embodiment includes a frame 9. An inlet mechanism 1, a sleeve assembly mechanism 2, a bell mouth assembly mechanism 3, an inner core assembly mechanism 4, an inner expansion mechanism 5, an air testing mechanism 6, a discharging mechanism 7 and a handling mechanism 8 are provided on the frame 9. The handling mechanism 8 is used to sequentially convey the PVC pipes from the inlet mechanism 1 through the sleeve assembly mechanism 2, the bell mouth assembly mechanism 3, the inner core assembly mechanism 4, the inner expansion mechanism 5, the air testing mechanism 6 and the discharging mechanism 7.

[0063] The inlet mechanism 1 includes an inlet fixing frame and a first conveying track 11, a second conveying track 12, a clamping assembly 13, an inlet rising assembly 14, an inlet falling assembly 15 provided on the inlet fixing frame. The first conveying track 11 and the second conveying track 12 are belt transmission tracks driven by a motor. The second conveying track 12 and the first conveying track 11 are arranged parallel to each other vertically and have opposite transmission directions. The inlet rising assembly 14 and the inlet falling assembly 15 are respectively located at both ends of the inlet fixing frame. The clamping assembly 13 is used to clamp the PVC pipes.

[0064] The clamping assembly 13 includes a clamping connecting rod and two feeding jaws. The two feeding jaws are respectively fixed at both ends of the clamping connecting rod, and both ends of the clamping connecting rod are slidably arranged on the first conveying track 11 and the second conveying track 12.

[0065] The feeding lifting assembly 14 includes a feeding lifting cylinder and a feeding lifting clamping part. The feeding lowering assembly 15 includes a feeding lowering cylinder and a feeding lowering clamping part. A feeding pushing cylinder can also be arranged on the feeding lifting assembly 14. When the feeding lifting assembly 14 clamps the clamping assembly 13 and rises to the input end of the second conveying track 12, the feeding pushing cylinder extends to push the clamping assembly 13 into the second conveying track 12.

[0066] The handling mechanism 8 includes a handling slide rail 81 located on the frame 9, multiple groups of handling jigs 82 slidably arranged on the handling slide rail 81, and a handling driving part 83 for driving the handling jigs 82 to slide along the handling slide rail 81. Each group of handling jigs 82 includes two handling jaws. The handling jigs 82 of the handling mechanism 8 are used to clamp the PVC pipe on the feeding mechanism 1 and transport it to the envelope assembling mechanism 2.

[0067] A height adjusting device 10 is arranged between the feeding mechanism 1 and the envelope assembling mechanism 2. The height adjusting mechanism includes a rodless cylinder 101, a height adjusting connecting rod 103, and two height adjusting jigs 102. The rodless cylinder 101 is vertically fixed on the frame 9 and is located above the handling jigs 82. The height adjusting connecting rod 103 is fixedly connected to the slider of the rodless cylinder 101 and is horizontally arranged. The height adjusting jigs 102 are located above the handling jigs 82 and are pneumatic jaws. The distance between the two height adjusting jigs 102 is equal to the distance between the two ends of the hose, and they are symmetrically distributed on both sides of the rodless cylinder 101. The two height adjusting jigs 102 are slidably connected to the height adjusting connecting rod 103 through height adjusting slide rods, and the heights of the two height adjusting slide rods are the same.

[0068] When the handling mechanism 8 transports the PVC pipe to below the height adjustment mechanism, the rodless cylinder 101 drives the two height adjustment clamps 102 to clamp the two ends of the PVC pipe downward. After the height adjustment clamps 102 clamp the hose, the handling gripper releases the hose. When the heights of the two ends of the PVC pipe are inconsistent, when the two height adjustment clamps 102 clamp the two ends of the PVC pipe, the higher end of the hose will push up the corresponding height adjustment clamp 102, resulting in the height of the height adjustment clamp 102 at the higher end of the PVC pipe being higher than the height of the height adjustment clamp 102 at the lower end of the PVC pipe. After the handling clamp 82 releases the PVC pipe, the height adjustment clamp 102 at the higher end of the hose descends under the action of its own weight. Since the self-weights of the two height adjustment clamps 102 are the same and the forces exerted by the PVC pipe on both of them are the same at this time, the height adjustment clamp 102 at the higher end of the PVC pipe will eventually drop to the same height as the clamp at the lower end of the PVC pipe, thereby adjusting the two ends of the PVC pipe to the same height and completing the adjustment of the heights of the two ends of the PVC pipe. The whole process is convenient to operate and has a simple structure. At the same time, through the adjustment of the height adjustment mechanism, the heights of the two ends of the PVC pipe are made consistent, ensuring the yield of subsequent envelope and inner core assembly.

[0069] The envelope assembly mechanism 2 includes an envelope conveying module 21, an envelope assembly module 22, and an envelope clamping module 23.

[0070] The envelope clamping module 23 includes two relatively arranged envelope clamps, and the two envelope clamps are respectively located on both sides of the handling slide rail 81. The envelope assembly module 22 includes an envelope clamping vertical frame 221, an envelope horizontal slide rail 222 fixed on the envelope clamping vertical frame 221, an envelope vertical slide rail 223 slidably arranged on the envelope horizontal slide rail 222, an envelope gripper 224 slidably arranged on the envelope vertical slide rail 223. The envelope gripper 224 is connected to an envelope vertical cylinder 225, and the envelope vertical slide rail 223 is connected to an envelope horizontal cylinder 226.

[0071] The envelope conveying module 21 includes an envelope vibrating disk 211 and an envelope conveying track 212. The envelope conveying track 212 extends from the envelope vibrating disk 211 to below the envelope assembly module 22. When the handling mechanism 8 transports the PVC pipe to the envelope assembly mechanism 2, the envelope assembly mechanism 2 further includes an envelope detection module for detecting whether an envelope is installed on the PVC pipe, and it can enter the next process only after passing the detection.

[0072] In this embodiment, two envelope assembly mechanisms 2 are provided, and each envelope assembly mechanism 2 is correspondingly provided with two envelope conveying modules 21. Two types of envelopes can be freely selected for the envelope assembly of multiple types of PVC pipes. The setting of the two vibrating disks helps to improve the efficiency of envelope assembly.

[0073] The bell mouth assembly mechanism 3 includes a bell mouth installation robot 31, a bell mouth clamping module 32, and a bell mouth conveying module 33. The bell mouth clamping module 32 includes two relatively arranged bell mouth assembly jigs, and the two bell mouth assembly jigs are respectively located on both sides of the handling slide rail 81. The bell mouth installation robot 31 is used to clamp and install the bell mouth on the bell mouth conveying module 33 onto the PVC pipe.

[0074] The bell mouth conveying module 33 includes a bell mouth conveying support frame 331, a bell mouth conveying lifting frame 332, a bell mouth conveying sliding track 333, and a lifting frame driving cylinder 334. A plurality of bell mouth placing trays 335 are arranged on the bell mouth conveying lifting frame 332. The bell mouth conveying sliding track 333 is fixed on the bell mouth conveying support frame 331. The bell mouth conveying lifting frame 332 and the bell mouth conveying sliding track 333 are arranged in connection. The output shaft of the lifting frame driving cylinder 334 is connected to the bottom of the bell mouth conveying lifting frame 332. The bell mouth conveying support frame 331 is fixed with a placing tray push-pull cylinder 336, and a placing tray pulling claw 337 is fixed on the output shaft of the placing tray push-pull cylinder 336. The placing tray pulling claw 337 is used to clamp the bell mouth placing tray 335.

[0075] A pulling block 338 is convexly fixed on one side of the bell mouth placing tray 335 close to the bell mouth conveying sliding track 333. The two ends of the pulling block 338 are in a sharp corner structure, and the placing tray pulling claw 337 is provided with a groove adapted to the shape of the sharp corner structure. The shape setting of the pulling block 338 is beneficial for the placing tray pulling claw 337 to stably grasp the bell mouth placing tray 335 and prevent the position of the bell mouth placing tray 335 from shifting when it is pulled.

[0076] The bell mouth conveying lifting frame 332 includes two relatively arranged lifting plates 3321. The inner side of the lifting plate 3321 is provided with a groove 3322 for accommodating the side of the bell mouth placing tray 335. The bottom of the lifting plate 3321 is connected to the output shaft of the lifting frame driving cylinder 334. This facilitates the placement of the bell mouth placing trays 335 one by one.

[0077] The bell mouth installation robot 31 includes a robot support frame 311, a rotary fixing seat 312, a rotary connecting rod 313, a lift head 314, and a bell mouth clamping component 315. The rotary fixing seat 312 is fixed on the robot support frame 311. The two ends of the rotary connecting rod 313 are respectively rotatably connected to the rotary fixing seat 312 and the lift head 314. The bell mouth clamping component 315 is fixed on the output shaft of the lift head 314. The lift head 314 is located above the bell mouth conveying sliding track 333.

[0078] The bell mouth clamping assembly 315 includes a clamping connecting rod 3151 and two bell mouth clamping jaws 3152. The middle part of the clamping connecting rod 3151 is fixed to the output shaft of the elevator head 314. The two bell mouth clamping jaws 3152 are respectively fixed at both ends of the lower surface of the clamping connecting rod 3151. An extension rod 3153 is fixed in the middle of the bell mouth clamping jaw 3152. The diameter of the extension rod 3153 is smaller than the diameter of the PVC pipe, and the length of the extension rod 3153 is greater than the length of the bell mouth. When assembling the bell mouth, the extension pipe passes through the bell mouth and extends into the interior of the PVC pipe, playing a supporting role for the end of the PVC pipe to prevent the end of the PVC pipe from sinking inward when the bell mouth is installed with the end of the PVC pipe, which affects the quality of the product.

[0079] In this embodiment, an L-shaped fixing rod is fixed to the side surface of the bell mouth clamping jaw 3152. The horizontal end of the fixing plate extends into the middle of the bell mouth clamping jaw 3152, and this end is fixed to the extension rod 3153.

[0080] The bell mouth assembling mechanism 3 further includes a bell mouth detection module for detecting whether a bell mouth is installed on the PVC pipe. Only after passing the detection can it enter the next process. In this embodiment, there are two groups of bell mouth conveying modules 33.

[0081] The inner core assembling mechanism 4 includes an inner core conveying module 41, an inner core assembling module 42, and an inner core clamping module 43. The inner core clamping module 43 includes two relatively arranged inner core clamps, and the two inner core clamps are respectively located on both sides of the handling slide rail 81. The inner core assembling module 42 includes an inner core clamping vertical frame 421, an inner core horizontal slide rail 422 fixed on the inner core clamping vertical frame 421, an inner core vertical slide rail 423 slidably arranged on the inner core horizontal slide rail 422, and an inner core clamping jaw 424 slidably arranged on the inner core vertical slide rail 423. When sliding, it is driven by corresponding horizontal or vertical cylinders.

[0082] The inner core conveying module 41 includes an inner core vibrating disk 411 and an inner core conveying track 412. The inner core conveying track 412 extends from the inner core vibrating disk 411 to the lower part of the inner core assembling module 42.

[0083] A transfer assembly 44 is provided at the discharge port of the inner core conveying track 412. The transfer assembly 44 includes a transfer slide rail 441, a horizontal sliding block 442, and an ejecting cylinder 444. The horizontal sliding block 442 is located below the inner core assembling module 42. A transfer groove 443 is provided on the horizontal sliding block 442 and is open towards the inner core conveying track 412. The ejecting cylinder 444 is located inside the transfer groove 443.

[0084] When the inner core is conveyed to the discharge port of the inner core conveying track 412, the horizontal sliding block 442 slides to the position where the transfer groove 443 is aligned with the discharge port. The inner core enters the transfer groove 443, and the horizontal sliding block 442 slides back to its original position. Then, the ejecting cylinder 444 ejects the inner core, facilitating the inner core assembly module 42 in the inner core assembly mechanism 4 to pick up the inner core. The setting of the transfer assembly 44 facilitates the picking up of inner cores one by one.

[0085] In this embodiment, there are two groups of inner core conveying modules 41. Two relatively arranged clamping pieces 425 are fixed on the inner core clamping jaw 424, and the clamping pieces 425 enter the interior of the inner core to support the inner core. Since in the present invention, a bell mouth has been sleeved on the end of the PVC pipe, if the inner core is directly clamped, during assembly, the inner core assembly module 42 cannot insert the inner core into the bell mouth. Using the method of using the clamping pieces 425 to enter the inner core to support and pick up the inner core makes the installation of the inner core more stable.

[0086] The inner expansion mechanism 5 includes an inner expansion pressing module 51 and an inner expansion clamping module 52. The inner expansion pressing module 51 includes an inner expansion support frame 511, an inner expansion turntable 512, an eccentric rotating cylinder 513, an inner expansion pressing cylinder 514, and an inner expansion pressing rod 515. The inner expansion turntable 512 is arranged on the inner expansion support frame 511. The top end of the inner expansion pressing rod 515 is connected to the inner expansion turntable 512 and the inner expansion pressing cylinder 514. The output shaft of the eccentric rotating cylinder 513 is eccentrically connected to the inner expansion turntable 512. The bottom end of the inner expansion pressing rod 515 is provided with an inner expansion boss 516, and a limiting boss 517 is arranged on the rod body of the inner expansion pressing rod 515.

[0087] The inner expansion clamping module 52 includes an inner expansion lifting plate 521 and a first lifting cylinder 522. The inner expansion lifting plate 521 is located below the inner expansion pressing module 51. The first lifting cylinder 522 is connected to the middle of the inner expansion lifting plate 521. Second lifting cylinders 523 are arranged at both ends of the inner expansion lifting plate 521, and inner expansion clamping jaws 524 are arranged on the second lifting cylinders 523.

[0088] Due to the eccentric connection of the eccentric rotating cylinder 513, the telescopic movement of the eccentric rotating cylinder 513 can be converted into the rotation of the inner expansion turntable 512, so that the inner expansion pressing rod 515 can rotate when pressing down, enabling the inner expansion pressing rod 515 to uniformly expand the PVC pipe. The limiting boss 517 is used to limit the distance of pressing down and extending into the interior of the PVC pipe.

[0089] The first lifting cylinder 522 is used to roughly adjust the position of the inner expansion clamping jaws 524, and the second lifting cylinders 523 are used for fine distance adjustment of the inner expansion clamping jaws 524.

[0090] The inner expansion turntable 512, the eccentric rotation cylinder 513, the inner expansion downward pressure cylinder 514 and the inner expansion downward pressure rod 515 are all in two groups. In this embodiment, multiple groups of inner expansion downward pressure modules 51 are arranged side by side, and inner core detection devices are provided before and after the inner expansion mechanism 5.

[0091] The air testing mechanism 6 includes an air testing material grabbing module 61 and an air inflation module 62. The air testing material grabbing module 61 includes a reciprocating conveyor belt 611, a reciprocating material conveying plate 612 arranged on the reciprocating conveyor belt 611, a reciprocating slide rail 613 fixed on the reciprocating material conveying plate 612, and an air testing jaw 614 slidably arranged on the reciprocating slide rail 613. The air testing jaw 614 is used to grab the PVC pipe after being downwardly expanded by the inner expansion mechanism 5.

[0092] The air inflation module 62 is located on the side of the reciprocating conveyor belt 611. The air inflation module 62 includes an air inflation support frame 621, an air inflation head 622 and a pneumatic pressure sensing head 623. The air inflation support frame 621 is fixed with two groups of air inflation clamping devices. Each group of air inflation clamping devices includes an air inflation upper jaw 624 and an air inflation lower jaw 625. Two air inflation downward pressure cylinders 626 are fixed on the air inflation support frame 621, and the air inflation head 622 and the pneumatic pressure sensing head 623 are respectively arranged on the output shafts of the two air inflation downward pressure cylinders 626.

[0093] The air testing material grabbing module 61 is a part of the handling mechanism 8. Multiple groups of air inflation modules 62 are provided, and the PVC pipe is driven by the reciprocating material conveying plate 612 to sequentially pass through the air testing of multiple air inflation modules 62.

[0094] A height fixing mechanism 20 is provided between the inner expansion mechanism 5 and the air testing mechanism 6. The height fixing mechanism 20 includes a height fixing support plate 201. An upper support platform 202 and a lower support platform 203 are respectively fixed on the upper surface and the lower surface of the height fixing support plate 201. Convex height fixing plates 204 and height fixing upper jaws 205 are provided at both ends of the upper support platform 202. A height fixing cylinder 206 is provided on the lower support platform 203. A height fixing rising plate is provided on the height fixing cylinder 206. Height fixing lower jaws 207 are fixed at both ends of the height fixing rising plate. The positions of the height fixing upper jaws 205 and the height fixing lower jaws 207 correspond to each other.

[0095] When the conveying mechanism 8 transports the PVC pipe to the height - fixing mechanism 20, the lower height - fixing jaw 207 clamps the PVC pipe. After the height - fixing cylinder 206 ascends a certain distance, the protruding height - fixing plate 204 presses down on both ends of the PVC pipe to play a role in height - fixing. Then, the upper height - fixing jaw 205 clamps the PVC pipe, the lower height - fixing jaw 207 releases and resets, and the air - testing jaw 614 slides along the reciprocating slide rail 613 to grab the PVC pipe. The discharging mechanism 7 includes a discharging fixture 73 for clamping both ends of the hose, an X - direction sliding track 71, and a Y - direction sliding track 72. The X - direction sliding track 71 is located at the end of the air - testing mechanism 6, the Y - direction sliding track 72 is slidably arranged on the X - direction sliding track 71, and the discharging fixture 73 is slidably arranged on the Y - direction sliding track 72. The discharging mechanism 7 is also correspondingly provided with a driving device.

[0096] In this embodiment, protective covers are provided on the frame 9, and the protective covers cover each process mechanism. A control terminal is arranged on the frame 9 for monitoring the operation of each mechanism.

[0097] The use of this embodiment includes the following steps:

[0098] (1) Feeding: The clamping assembly 13 is manually loaded with materials at the input end of the first conveying track 11, and then is conveyed to the output end of the first conveying track 11 via the first conveying track 11. The handling jaw of the handling slide rail 81 grabs the PVC pipe, the clamping assembly 13 releases the PVC pipe, and the empty clamping assembly 13 is clamped and lifted to the input end of the second conveying track by the feeding lifting assembly 14, and finally descends to the input end of the first conveying track 11 via the feeding lowering assembly 15 at the output end of the second conveying track;

[0099] (2) Sleeve assembly: After the PVC pipe is adjusted in height and level by the height - adjusting device 10, it is continuously clamped and conveyed to the sleeve - assembling mechanism 2 by the handling fixture 82 of the handling mechanism 8. The sleeve - clamping module 23 acts to clamp the PVC pipe. The sleeve 100 is conveyed to the lower part of the sleeve - clamping module 23 via the sleeve vibrating disk 211 and the sleeve conveying track 212. The sleeve - clamping jaw 224 slides downward to grab the sleeve 100, ascends a certain distance, and then slides along the sleeve horizontal slide rail 222 to the upper part of the PVC pipe. The sleeve - clamping jaw 224 slides downward to put the sleeve 100 on the end of the PVC pipe. Then, the handling fixture 82 of the handling mechanism 8 continues to grab the PVC pipe and convey it to the next process;

[0100] (3) Bell Mouth Assembly: When the PVC pipe is moved to the bell mouth assembly mechanism 3 by the handling fixture 82 of the handling mechanism 8, two bell mouth assembly fixtures are arranged opposite to each other to clamp both ends of the PVC pipe. The handling fixture 82 releases the PVC pipe. The lifting frame driving cylinder 334 drives the bell mouth conveying lifting frame 332 to rise to a position where the bell mouth placement tray 335 is flush with the bell mouth conveying sliding track 333. The placement tray push-pull cylinder 336 pulls the bell mouth placement tray 335 to the lower part of the bell mouth installation robot 31. The bell mouth gripper 3152 descends to grasp the bell mouth 300. Then the bell mouth gripper 3152 rises, the rotating connecting rod 313 rotates, and the elevator head 314 rotates to the upper part of the PVC pipe. The bell mouth gripper 3152 descends to install the bell mouth 300 onto the PVC pipe.

[0101] Multiple bell mouths 300 are placed on a bell mouth placement tray 335. After the bell mouths 300 on the bell mouth placement tray 335 are used up, the placement tray push-pull cylinder 336 pushes the bell mouth placement tray 335 back to the bell mouth conveying lifting frame 332. The lifting frame driving cylinder 334 drives the bell mouth conveying lifting frame 332 to rise one grid, and the placement tray push-pull cylinder 336 pulls the next bell mouth placement tray 335 again.

[0102] (4) Inner Core Assembly: When the handling mechanism 8 transports the PVC pipe to the inner core assembly mechanism 4, the inner core clamping module 43 acts to clamp the PVC pipe. The inner core 200 is transported to the transfer groove 443 of the transfer assembly 44 via the inner core vibrating disk 411 and the inner core conveying track 412. The ejecting cylinder 444 ejects the inner core 200. The inner core gripper 424 slides downward, and the clamping piece 425 enters the inside of the inner core 200. After opening a certain distance, the clamping piece 425 picks up the inner core 200 in the opened manner. After the inner core gripper 424 rises a certain distance, it slides along the inner core horizontal slide rail 422 to the upper part of the PVC pipe. The inner core gripper 424 slides downward to install the inner core 200 at the end of the PVC pipe. Then the handling fixture 82 of the handling mechanism 8 continues to clamp the PVC pipe and transport it to the next process.

[0103] (5) Inner Expansion: When the PVC pipe is transported to the inner expansion mechanism 5 by the handling fixture 82 of the handling mechanism 8, the inner expansion clamping module 52 clamps the PVC pipe. The inner expansion pressing rod 515 is pressed downward by the inner expansion pressing cylinder 514 and enters the end of the PVC pipe. The eccentric rotating cylinder 513 drives the inner expansion pressing rod 515 to rotate. The inner expansion boss 516 expands the inside of the end of the PVC pipe for inner expansion, and makes the inner core, the envelope and the bell mouth installed tightly. Then the handling fixture 82 of the handling mechanism 8 continues to clamp the PVC pipe and transport it to the next process.

[0104] (6) Air testing: After the PVC pipe is height-fixed by the height-fixing mechanism 20, it is grabbed by the air-testing material-grabbing module 61 and transported below the air-filling module 62. The air-filling clamping device fixes the PVC pipe. The air-filling pressing cylinder 626 presses down, and the air-filling head 622 is connected to an external air pipe to fill the PVC pipe with air. The air pressure sensor head 623 at the other end of the PVC pipe senses the change in air pressure, thereby detecting the airtightness of the PVC pipe after assembly. The PVC pipes that pass the air test are continuously transported to the next process;

[0105] (7) Discharging: When the PVC pipe is transported by the air-testing mechanism 6 to the starting end of the X-direction sliding track 71, the discharging clamp 73 grabs the PVC pipe, then slides to the other end, and then the discharging clamp 73 slides out along the Y-direction sliding track 72.

[0106] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or terminal device. Without further limitation, elements defined by the statement "comprising..." or "including..." do not exclude the presence of additional elements in the process, method, article or terminal device comprising the said elements. In addition, in this text, "greater than", "less than", "more than" are understood not to include the number itself; "above", "below", "within" are understood to include the number itself.

[0107] Although the above embodiments have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the above are only the embodiments of the present invention, and do not limit the patent protection scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A self-assembly device for PVC pipes, characterized in that, It includes a frame, on which are provided a feeding mechanism, a sleeve assembling mechanism, a bell mouth assembling mechanism, a core assembling mechanism, an inner expansion mechanism, a leak testing mechanism, a discharging mechanism and a handling mechanism. The handling mechanism is used to sequentially convey the PVC pipe from the feeding mechanism through the sleeve assembling mechanism, the bell mouth assembling mechanism, the core assembling mechanism, the inner expansion mechanism, the leak testing mechanism and the discharging mechanism. The feeding mechanism is used to convey the PVC pipe to the starting end of the handling mechanism. The sleeve assembling mechanism, the bell mouth assembling mechanism and the core assembling mechanism are respectively used to assemble a sleeve, a bell mouth and a core on the PVC pipe. The inner expansion mechanism is used to press down the end of the inner-expanded PVC pipe. The leak testing mechanism is used for leak testing of the PVC pipe. The bell mouth assembling mechanism includes a bell mouth installation robot, a bell mouth clamping module and a bell mouth conveying module. The bell mouth clamping module includes two relatively arranged bell mouth assembling jigs, and the two bell mouth assembling jigs are respectively located on both sides of the handling mechanism. The bell mouth conveying module includes a bell mouth conveying support frame, a bell mouth conveying lifting frame, a bell mouth conveying sliding track and a lifting frame driving cylinder. A plurality of bell mouth placing trays are arranged on the bell mouth conveying lifting frame. The bell mouth conveying sliding track is fixed on the bell mouth conveying support frame. The bell mouth conveying lifting frame and the bell mouth conveying sliding track are arranged in sequence. The output shaft of the lifting frame driving cylinder is connected to the bottom of the bell mouth conveying lifting frame. A placing tray pushing and pulling cylinder is fixed on the bell mouth conveying support frame, and a placing tray pulling claw is fixed on the output shaft of the placing tray pushing and pulling cylinder. The placing tray pulling claw is used to clamp the bell mouth placing tray. The bell mouth installation robot is used to clamp and install the bell mouth on the bell mouth conveying module onto the PVC pipe. One side of the bell mouth placing tray close to the bell mouth conveying sliding track is convexly fixed with a pulling block, and the two ends of the pulling block are in a sharp corner structure. The placing tray pulling claw is provided with a groove adapted to the shape of the sharp corner structure. The bell mouth conveying lifting frame includes two relatively arranged lifting plates. The inner side surface of the lifting plate is provided with a groove for accommodating the side edge of the bell mouth placing tray. The bottom of the lifting plate is connected to the output shaft of the lifting frame driving cylinder. The bell mouth installation robot includes a robot support frame, a rotating fixed seat, a rotating connecting rod, a lifting machine head and a bell mouth clamping component. The rotating fixed seat is fixed on the robot support frame. The two ends of the rotating connecting rod are respectively rotatably connected to the rotating fixed seat and the lifting machine head. The bell mouth clamping component is fixed on the output shaft of the lifting machine head. The lifting machine head is located above the bell mouth conveying sliding track. The bell mouth clamping component includes a clamping connecting rod and two bell mouth clamping claws. The middle part of the clamping connecting rod is fixed to the output shaft of the lifting machine head. The two bell mouth clamping claws are respectively fixed at both ends of the lower surface of the clamping connecting rod. A extending rod is fixed in the middle of the bell mouth clamping claw. The diameter of the extending rod is smaller than the diameter of the PVC pipe, and the length of the extending rod is greater than the length of the bell mouth.

2. The self-assembly device for PVC pipes according to claim 1, characterized in that, The inner core assembly mechanism includes an inner core conveying module, an inner core assembly module, and an inner core clamping module. The inner core clamping module is used to clamp the PVC pipe. The inner core conveying module includes an inner core vibrating disk and an inner core conveying track. The inner core conveying track extends from the inner core vibrating disk to the lower part of the inner core assembly module. A transfer assembly is provided at the discharge port of the inner core conveying track. The transfer assembly includes a transfer slide rail, a horizontal sliding block, and an ejecting cylinder. The horizontal sliding block is located below the inner core assembly module. A transfer groove opening towards the inner core conveying track is provided on the horizontal sliding block. The ejecting cylinder is located inside the transfer groove. The inner core assembly module is used to transfer and install the inner core on the transfer assembly onto the PVC.

3. The self-assembly device for PVC pipes according to claim 2, characterized in that, The inner core clamping module includes two relatively arranged inner core clamps, which are respectively located on both sides of the handling slide rail. The inner core assembly module includes an inner core clamping vertical frame, an inner core horizontal slide rail fixed on the inner core clamping vertical frame, an inner core vertical slide rail slidably arranged on the inner core horizontal slide rail, and an inner core jaw slidably arranged on the inner core vertical slide rail. Two relatively arranged clamping pieces are fixed on the inner core jaw. The clamping pieces are used to extend into the inside of the inner core and expand the inner core.

4. The self-assembly device for PVC pipes according to claim 1, characterized in that, The inner expansion mechanism includes an inner expansion pressing module and an inner expansion clamping module. The inner expansion pressing module includes an inner expansion support frame, an inner expansion turntable, an eccentric rotating cylinder, an inner expansion pressing cylinder, and an inner expansion pressing rod. The inner expansion turntable is arranged on the inner expansion support frame. The top end of the inner expansion pressing rod is connected to the inner expansion turntable and the inner expansion pressing cylinder. The output shaft of the eccentric rotating cylinder is eccentrically connected to the inner expansion turntable. An inner expansion boss is provided at the bottom end of the inner expansion pressing rod, and a limiting boss is provided on the rod body of the inner expansion pressing rod. The inner expansion clamping module includes an inner expansion lifting plate and a first lifting cylinder. The inner expansion lifting plate is located below the inner expansion pressing module. The first lifting cylinder is connected to the middle of the inner expansion lifting plate. Second lifting cylinders are provided at both ends of the inner expansion lifting plate, and inner expansion jaws are provided on the second lifting cylinders.

5. The self-assembly device for PVC pipes according to claim 1, characterized in that, The air testing mechanism includes an air testing material grabbing module and an inflation module. The air testing material grabbing module includes a reciprocating conveyor belt, a reciprocating material conveying plate arranged on the reciprocating conveyor belt, a reciprocating slide rail fixed on the reciprocating material conveying plate, and an air testing jaw slidably arranged on the reciprocating slide rail. The air testing jaw is used to grab the PVC pipe after being pressed and expanded by the inner expansion mechanism. The inflation module is located on the side of the reciprocating conveyor belt. The inflation module includes an inflation support frame, an inflation head, and a pressure sensing head. Two groups of inflation clamping devices are fixed on the inflation support frame. Each group of inflation clamping devices includes an inflation upper jaw and an inflation lower jaw. Two inflation pressing cylinders are fixed on the inflation support frame. The inflation head and the pressure sensing head are respectively arranged on the output shafts of the two inflation pressing cylinders.

6. The self-assembly device for PVC pipes according to claim 1, characterized in that, A height-fixing mechanism is provided between the inner expansion mechanism and the air testing mechanism. The height-fixing mechanism includes a height-fixing support plate. An upper support platform and a lower support platform are respectively fixed on the upper surface and the lower surface of the height-fixing support plate. At both ends of the upper support platform, there are protruding height-fixing plates and upper height-fixing clamping jaws. A height-fixing cylinder is provided on the lower support platform. A height-fixing rising plate is provided on the height-fixing cylinder. Lower height-fixing clamping jaws are fixed at both ends of the height-fixing rising plate. The upper height-fixing clamping jaws and the lower height-fixing clamping jaws are correspondingly positioned.

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