Core shrinkage type demolding production line for concrete pipeline pouring

Abstract

The invention discloses a concrete pipeline pouring core shrinkage type demolding production line, and belongs to the technical field of concrete product machining. The production line comprises a movable hanging bracket, a pouring base is arranged below the movable hanging bracket, a demolding base is arranged on the rear side of the pouring base, and an inner mold assembly is arranged at the top of the pouring base; the inner mold assembly comprises main mold plates located on the front side and the rear side of the top of the pouring base, side mold plates are arranged at the two ends of the opposite sides of the two main mold plates, and rotating pieces are arranged between the side mold plates and the main mold plates. Through cooperative use of the movable hanging bracket, the mold removal base, the non-return assembly and the mold removal assembly, the outer mold plate is horizontally opened and closed, mold closing and demolding are achieved, meanwhile, under cooperative use of the movable hanging bracket, the inner mold assembly and the inner supporting assembly, the inner mold is rapidly clamped, reducing demolding is achieved, and the mold removal efficiency is improved. Therefore, the purposes of reducing product surface damage, automatically separating and demoulding and stably and firmly assembling the mould can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete product processing, and in particular relates to a core-shrinking demoulding production line for pouring concrete pipes. Background Art

[0002] Concrete pipes are an important structure used in urban underground infrastructure, usually made of concrete materials. Concrete pipes have the advantages of high strength, good durability, strong impermeability, and relatively simple construction. They can work stably for a long time under different geological and environmental conditions, and effectively ensure the safe operation and maintenance management of urban underground pipeline systems.

[0003] In the process of demoulding, the vertical lifting demoulding method is adopted, and the mold is in close contact with the surface of the product, which may cause the mold to damage the surface of the product, affecting the appearance and quality of the pipeline. In addition, in the demoulding and assembly process of large pipelines, there are many steps for disassembling and assembling related locks, which is labor-intensive and inefficient. Therefore, it is necessary to provide a concrete pipe casting core shrinking demoulding production line, which adopts the inner shrinking core method to first separate the mold and the product to avoid damage to the product during the lifting of the mold. At the same time, it is equipped with automatic mold closing and mold opening structure to reduce labor input and speed up the production process. Summary of the invention

[0004] The purpose of the present invention is to provide a concrete pipe casting core shrinking demoulding production line, which adopts the inner core shrinking method to first separate the mold and the product to avoid damage to the product during the mold lifting process. At the same time, it is equipped with automatic mold closing and mold opening structure to reduce labor input and speed up the production process to solve the above technical problems.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a concrete pipe casting core-shrinking demoulding production line, the production line includes a movable hanger: a casting base is arranged below the movable hanger, a demoulding base is arranged on the rear side of the casting base, an inner mold assembly is arranged on the top of the casting base, the inner mold assembly includes a main mold plate located at the front and rear sides of the top of the casting base, side mold plates are arranged at both ends of the opposite sides of the two main mold plates, a rotating part is arranged between the side mold plate and the main mold plate, one end of the rotating part is rotatably connected to the main mold plate, and the other end of the rotating part is rotatably connected to the side mold plate, a connecting seat is arranged on the top between the two main mold plates, connecting rods are rotatably connected on both sides of the connecting seat, an inner support assembly is arranged between the two side mold plates, and outer mold plates are arranged on both sides of the top of the casting base. The bottom of the outer formwork is fixedly connected with a slidable sliding seat, and both ends of the front and rear sides of the top of the casting base are provided with non-return components. The non-return component includes rectangular grooves opened at the four corners of the top of the casting base, the inner cavity of the rectangular groove is fixedly connected with a fixed shell, the inner cavity of the fixed shell is slidably connected with a sliding frame, and the inner cavity of the fixed shell is slidably connected with a non-return block on the side of the inner cavity of the fixed shell away from the sliding frame. The front and rear sides of the bottom of the sliding seat are fixedly connected with a non-return rack, and the non-return block is meshed with the non-return rack. The inner cavity of the fixed shell is rotatably connected with a changing gear, and the opposite sides of the sliding frame and the non-return block are fixedly connected with a synchronous rack, and the changing gear is meshed with the synchronous rack. A second spring is welded on the top of the sliding frame, and the top of the second spring is welded to the fixed shell, and a demolding assembly is provided on the top of the demolding base.

[0006] Preferably, the inner support assembly includes a first inner support square column and a second inner support square column, the opposite sides of the first inner support square column and the second inner support square column are respectively rotatably connected to the two side templates, the surface of the second inner support square column is rotatably connected to a limiting clamp, the front and rear sides of the first inner support square column are fixedly connected with fixing pins, and the limiting clamp is engaged with the surface of the fixing pin.

[0007] Preferably, tension springs are welded to the right ends of the front and rear sides of the second inner supporting square column, the left end of the tension spring is welded to a limiting clamp, the top of the limiting clamp is fixedly connected to a hanging chain, and the top end of the hanging chain is fixedly connected to the bottom end of the suspension rod.

[0008] Preferably, the front side and the rear side of the second inner supporting square column are fixedly connected with a stop pin, and the surface of the stop pin is tightly fitted with the right side of the limiting clamp.

[0009] Preferably, a suspension rod is provided through the top of the connecting seat, a first spring is sleeved on the surface of the suspension rod, and the top and bottom ends of the first spring are respectively welded to the connecting seat and the suspension rod.

[0010] Preferably, the demolding assembly includes rectangular slide grooves opened on both sides of the demolding base, the inner cavity of the rectangular slide groove is slidably connected with a slide seat, the inner cavity of the rectangular slide groove on the left side is rotatably connected with a bidirectional threaded rod through a bearing, the right end of the bidirectional threaded rod passes through the right side of the demolding base, and a stepper motor is fixedly installed on the right side of the demolding base, and the right end of the bidirectional threaded rod is fixedly connected to the output shaft of the stepper motor.

[0011] Preferably, the top of the sliding seat is fixedly connected to a docking seat, the bottom of the sliding seat is fixedly connected to a docking joint, arc-shaped through holes matching the docking seat are opened on both sides of the bottom of the casting base, and the bottom end of the docking joint passes through the arc-shaped through holes and is inserted into the inner cavity of the docking seat.

[0012] Preferably, the front end and the rear end on both sides of the top of the demoulding base are fixedly connected with extrusion protrusions, and the extrusion protrusions are engaged in the inner cavity of the rectangular groove.

[0013] Preferably, two sets of quick locks are installed on the front and rear sides of the two outer templates.

[0014] A working method of a concrete pipe casting core-shrinking demoulding production line, the method steps are as follows: Step 1: During the demoulding process, the casting base and the outer template are hoisted as a whole by moving the hanger, and the casting base is moved to the top of the demoulding base, so that the extrusion protrusion is engaged in the inner cavity of the rectangular groove, and the docking seat is inserted into the inner cavity of the arc-shaped through hole and sleeved on the surface of the docking head. At this time, the sliding frame slides upward under the extrusion of the extrusion protrusion, and at the same time, the non-return block slides downward under the cooperation of the synchronous rack and the changing gear, so that the non-return block is disengaged from the non-return rack, and the second spring is compressed at the same time, and the sliding seat is unlocked, and then the user opens the quick lock to unlock the two outer templates; Step 2: Then the stepper motor is turned on and drives the bidirectional threaded rod to rotate. During the rotation process, the bidirectional threaded rod pushes the two sliding seat threads through its surface threads, so that the two sliding seats move back to back. During the movement of the sliding seat, the two sliding seats are pulled by the cooperation of the docking seat and the docking head, so that the sliding seat drives the outer template to slide on the top of the mobile hanger, thereby opening the two outer templates and breaking contact with the surface of the pipe; Step three, then lift the hanger by moving the hanger bracket, so that the hanger slides upward, and during the sliding process of the hanger, the limit clamp is pulled by the lifting chain, so that the limit clamp rotates, and the limit clamp is separated from the fixed pin during the rotation, and the tension spring is stretched. At this time, the first inner support square column and the second inner support square column are unlocked, and with the coordinated use of the hanger and the lifting chain, the first inner support square column and the second inner support square column are separated, and the first spring is compressed to the limit, and the continuously rising hanger lifts the connecting seat, so that the two connecting rods generate pulling force on the two side templates, so that the two side templates move toward each other, and under the linkage action of the rotating part, the two main templates move toward each other at the same time, so that the rotating part and the main template shrink, and the inner wall of the pipe is separated from the surface of the main template and the side template, and finally the main template and the side template are lifted and taken out as a whole to complete the demoulding.

[0015] The beneficial effects of the present invention are as follows: the present invention realizes mold closing and demoulding by horizontally opening and closing the outer template through the coordinated use of the movable hanger, the demoulding base, the anti-return assembly and the demoulding assembly; at the same time, with the coordinated use of the movable hanger, the inner mold assembly and the inner support assembly, the inner mold is quickly engaged to realize the reduction in diameter demoulding, thereby achieving the purpose of reducing product surface damage, automatically separating and demoulding, and ensuring stable and reliable mold assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or other advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only exemplary and do not limit the present invention, wherein: Figure 1 A schematic top view of an embodiment of the present invention; Figure 2 A three-dimensional schematic diagram of a casting base, an outer mold plate and an inner mold assembly according to an embodiment of the present invention; Figure 3 It is a schematic diagram of the main view of a casting base, a demoulding base, an inner support assembly, an inner mold assembly and an outer mold board according to an embodiment of the present invention; Figure 4 An embodiment of the present invention Figure 3 A partial enlarged view of point A; Figure 5 It is a three-dimensional exploded view of a casting base, a sliding seat and a non-return assembly according to an embodiment of the present invention; Figure 6 It is a three-dimensional exploded view of an inner mold assembly and an inner support assembly according to an embodiment of the present invention; Figure 7 An embodiment of the present invention Figure 6 A partial enlarged view of point B in the middle; Figure 8 An embodiment of the present invention Figure 6 A partial enlarged view of point C in the middle; Fig. 9 It is a three-dimensional schematic diagram of a demoulding base and a demoulding assembly according to an embodiment of the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Mobile hanger, 2. Casting base, 3. Demolding base, 4. Inner mold assembly, 41. Main template, 42. Side template, 43. Rotating part, 44. Connecting seat, 45. Connecting rod, 46. Hanging rod, 47. First spring, 5. Inner support assembly, 51. First inner support square column, 52. Second inner support square column, 53. Limiting card, 54. Fixed pin, 55. Tension spring, 56. Lifting chain, 57. Stop pin, 6. Outer template, 7. Sliding Seat, 8, non-return assembly, 81, rectangular groove, 82, fixed shell, 83, sliding frame, 84, non-return block, 85, non-return rack, 86, change gear, 87, synchronous rack, 88, second spring, 9, demoulding assembly, 91, rectangular slide groove, 92, slide seat, 93, bidirectional threaded rod, 94, stepping motor, 95, docking seat, 96, docking head, 97, extrusion protrusion, 98, arc through hole, 10, quick lock. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments of a concrete pipe casting core shrinking demoulding production line according to the present invention will be described with reference to the accompanying drawings.

[0019] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are illustrative and exemplary, and should not be interpreted as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0020] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the present invention and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of various components of the embodiments of the present invention, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0021] Embodiment 1: Figure 1-9A concrete pipe casting core-shrinking demoulding production line according to an embodiment of the present invention is shown, the production line comprises a mobile hanger 1: a casting base 2 is arranged below the mobile hanger 1, a demoulding base 3 is arranged at the rear side of the casting base 2, an inner mold assembly 4 is arranged on the top of the casting base 2, the inner mold assembly 4 comprises main mold plates 41 located at the front and rear sides of the top of the casting base 2, side mold plates 42 are arranged at both ends of the opposite side of the two main mold plates 41, a rotating member 43 is arranged between the side mold plates 42 and the main mold plates 41, one end of the rotating member 43 is rotatably connected to the main mold plate 41, and the other end of the rotating member 43 is rotatably connected to the main mold plate 41. One end is rotatably connected to the side template 42, a connecting seat 44 is provided at the top between the two main templates 41, a suspension rod 46 is provided on the top of the connecting seat 44, a first spring 47 is sleeved on the surface of the suspension rod 46, the top and bottom ends of the first spring 47 are respectively welded to the connecting seat 44 and the suspension rod 46, and the transmission interval is realized by the coordinated use of the suspension rod 46 and the first spring 47, so that the suspension rod 46 can first drive the limit card 53 to rotate through the suspension chain 56, and then pull the two side templates 42 through the connecting rod 45, so as to achieve the purpose of automatic unlocking, and the connecting seat 44 Both sides of the casting base 2 are rotatably connected with connecting rods 45, an inner support assembly 5 is arranged between the two side templates 42, both sides of the top of the casting base 2 are provided with outer templates 6, the front and rear sides of the two outer templates 6 are installed with two sets of quick locks 10, the bottom of the outer template 6 is fixedly connected with a slidable sliding seat 7, both ends of the front and rear sides of the top of the casting base 2 are provided with a non-return assembly 8, the non-return assembly 8 includes a rectangular groove 81 opened at the four corners of the top of the casting base 2, the inner cavity of the rectangular groove 81 is fixedly connected with a fixed shell 82, and the inner cavity of the fixed shell 82 is slidably connected with a sliding frame 83, A non-return block 84 is slidably connected to the side of the inner cavity of the fixed shell 82 away from the sliding frame 83, and a non-return rack 85 is fixedly connected to the front and rear sides of the bottom of the sliding seat 7, and the non-return block 84 and the non-return rack 85 are meshed with each other. The inner cavity of the fixed shell 82 is rotatably connected to a changing gear 86, and the opposite sides of the sliding frame 83 and the non-return block 84 are fixedly connected with a synchronous rack 87, and the changing gear 86 and the synchronous rack 87 are meshed with each other. A second spring 88 is welded to the top of the sliding frame 83, and the top of the second spring 88 is welded to the fixed shell 82. A demolding assembly 9 is provided on the top of the demolding base 3.

[0022] Embodiment 2: It is basically the same as Embodiment 1, and furthermore, the inner support assembly 5 comprises a first inner support square column 51 and a second inner support square column 52, and the first inner support square column 51 and the second inner support square column 52 are respectively connected to the two side templates 42 on their opposite sides, and the surface of the second inner support square column 52 is connected to the limit clamp 53 on its surface, and the front and rear sides of the first inner support square column 51 are fixedly connected to the fixing pin 54, and the limit clamp 53 is engaged with the surface of the fixing pin 54, and the right end of the front and rear sides of the second inner support square column 52 is welded with a tension spring 55, and the left end of the tension spring 55 is welded to the limit clamp 53, and the top of the limit clamp 53 is fixedly connected to the suspension chain 56, and the top of the suspension chain 56 is fixedly connected to the suspension chain 56. The end is fixedly connected to the bottom end of the hanger 46, and the front and rear sides of the second inner support square column 52 are fixedly connected with a stop pin 57, and the surface of the stop pin 57 is tightly fitted with the right side of the limit clamp 53. Through the setting of the inner support assembly 5, the limit clamp 53, the tension spring 55 and the fixing pin 54 are used in coordination to lock and limit the first inner support square column 51 and the second inner support square column 52, so that the first inner support square column 51 and the second inner support square column 52 remain horizontal, thereby generating a lateral extrusion force on the two side templates 42 to prevent the two main templates 41 and the two side templates 42 from being displaced due to the extrusion of concrete during the concrete pouring process.

[0023] Embodiment 3: It is basically the same as Embodiment 1, and furthermore, the demolding assembly 9 includes rectangular slide grooves 91 provided on both sides of the demolding base 3, the inner cavity of the rectangular slide groove 91 is slidably connected with a slide seat 92, the inner cavity of the rectangular slide groove 91 on the left side is rotatably connected with a bidirectional threaded rod 93 through a bearing, the right end of the bidirectional threaded rod 93 penetrates to the right side of the demolding base 3, a stepper motor 94 is fixedly installed on the right side of the demolding base 3, the right end of the bidirectional threaded rod 93 is fixedly connected to the output shaft of the stepper motor 94, the top of the slide seat 92 is fixedly connected with a docking seat 95, the bottom of the slide seat 7 is fixedly connected with a docking joint 96, and both sides of the bottom of the casting base 2 are provided with a docking joint. The arc-shaped through hole 98 is adapted to the seat 95, and the bottom end of the docking joint 96 passes through the arc-shaped through hole 98 and is inserted into the inner cavity of the docking seat 95. The front and rear ends of the top sides of the demoulding base 3 are fixedly connected with extrusion protrusions 97, and the extrusion protrusions 97 are engaged in the inner cavity of the rectangular groove 81. Through the arrangement of the demoulding component 9, under the drive of the stepper motor 94, the coordinated use of the bidirectional threaded rod 93 and the sliding seat 92, the two docking seats 95 are pushed toward and away from each other, so that under the coordinated use of the docking seat 95 and the docking joint 96, the two sliding seats 7 can be driven to move toward or away from each other at the same time, thereby improving the convenience and stability of demoulding the external template 6.

[0024] A working method of a concrete pipe casting core-shrinking demoulding production line, the method steps are as follows: Step 1: During the demoulding process, the casting base 2 and the outer template 6 are hoisted as a whole by moving the hanger 1, and the casting base 2 is moved to the top of the demoulding base 3, so that the extrusion protrusion 97 is engaged in the inner cavity of the rectangular groove 81, and the docking seat 95 is inserted into the inner cavity of the arc through hole 98 and sleeved on the surface of the docking head 96. At this time, the sliding frame 83 slides upward under the extrusion of the extrusion protrusion 97, and at the same time, the non-return block 84 slides downward under the cooperation of the synchronous rack 87 and the change gear 86, so that the non-return block 84 is disengaged from the non-return rack 85, and the second spring 88 is compressed. At this time, the sliding seat 7 is unlocked, and then the user opens the quick lock 10 to unlock the two outer templates 6; Step 2: Then the stepper motor 94 is turned on and drives the bidirectional threaded rod 93 to rotate. During the rotation process, the bidirectional threaded rod 93 pushes the two slide seats 92 through its surface threads, so that the two slide seats 92 move back to back. During the movement process, the slide seats 92 pull the two slide seats 7 through the cooperation of the docking seat 95 and the docking head 96, so that the slide seats 7 drive the outer template 6 to slide on the top of the mobile hanger 1, thereby opening the two outer templates 6 and breaking contact with the surface of the pipe; Step 3, then lift the suspension rod 46 by moving the suspension bracket 1, so that the suspension rod 46 slides upward, and the suspension rod 46 pulls the limit clamp 53 through the suspension chain 56 during the upward sliding process, so that the limit clamp 53 rotates, and the limit clamp 53 is separated from the fixing pin 54 during the rotation process, and the tension spring 55 is stretched at the same time, at this time, the first inner support square column 51 and the second inner support square column 52 are unlocked, and with the cooperation of the suspension rod 46 and the suspension chain 56, the first inner support square column 51 and the second inner support square column 52 are separated At the same time, the first spring 47 is compressed to the limit, and the continuously rising suspension rod 46 lifts the connecting seat 44, so that the two connecting rods 45 generate pulling force on the two side templates 42, so that the two side templates 42 move toward each other. Under the linkage action of the rotating member 43, the two main templates 41 move toward each other at the same time, so that the rotating member 43 and the main template 41 shrink, and the inner wall of the pipeline is separated from the surface of the main template 41 and the side template 42. Finally, the main template 41 and the side template 42 are lifted and taken out as a whole to complete the demoulding.

[0025] In summary: the concrete pipe casting core-shrinking demoulding production line, through the coordinated use of the mobile hanger 1, the demoulding base 3, the anti-return component 8 and the demoulding component 9, the outer template 6 is horizontally opened and closed to achieve mold closing and demoulding. At the same time, with the coordinated use of the mobile hanger 1, the inner mold component 4 and the inner support component 5, the inner mold is quickly engaged to achieve diameter reduction demoulding, which can achieve the purpose of reducing product surface damage, automatic separation and demoulding, and stable and reliable mold assembly.

Claims

1. A concrete pipe casting core shrinking demoulding production line, characterized in that: The production line comprises a movable hanger (1): a casting base (2) is arranged below the movable hanger (1), a demoulding base (3) is arranged at the rear side of the casting base (2), an inner mold assembly (4) is arranged at the top of the casting base (2), the inner mold assembly (4) comprises a main mold plate (41) located at the front and rear sides of the top of the casting base (2), side mold plates (42) are arranged at both ends of the opposite side of the two main mold plates (41), a rotating member (43) is arranged between the side mold plate (42) and the main mold plate (41), one end of the rotating member (43) is rotatably connected to the main mold plate (41), and the other end of the rotating member (43) is rotatably connected to the side mold plate (42), a connecting seat (44) is arranged at the top between the two main mold plates (41), and connecting rods (45) are rotatably connected to both sides of the connecting seat (44), and a non-return assembly (8) is arranged at both ends of the front and rear sides of the top of the casting base (2).

2. A concrete pipe casting core shrinking demoulding production line according to claim 1, characterized in that: The anti-return component (8) comprises a rectangular groove (81) formed at four corners of the top of the casting base (2); the inner cavity of the rectangular groove (81) is fixedly connected to a fixed shell (82); the inner cavity of the fixed shell (82) is slidably connected to a sliding frame (83); a side of the inner cavity of the fixed shell (82) away from the sliding frame (83) is slidably connected to an anti-return block (84); the bottom of the outer template (6) is fixedly connected to a slidable sliding seat (7); the front and rear sides of the bottom of the sliding seat (7) are fixedly connected to anti-return racks (85); The anti-return block (84) is meshed with the anti-return rack (85); the inner cavity of the fixed shell (82) is rotatably connected to a direction-changing gear (86); the sliding frame (83) and the side opposite to the anti-return block (84) are fixedly connected to a synchronous rack (87); the direction-changing gear (86) and the synchronous rack (87) are meshed; a second spring (88) is welded to the top of the sliding frame (83); the top of the second spring (88) is welded to the fixed shell (82); and a demoulding assembly (9) is provided on the top of the demoulding base (3).

3. A concrete pipe casting core shrinking demoulding production line according to claim 2, characterized in that: The inner support assembly (5) comprises a first inner support square column (51) and a second inner support square column (52); the first inner support square column (51) and the second inner support square column (52) are rotatably connected to two side templates (42) at opposite sides thereof; the surface of the second inner support square column (52) is rotatably connected to a limiting clamp (53); the front and rear sides of the first inner support square column (51) are fixedly connected to fixing pins (54); the limiting clamp (53) is engaged with the surface of the fixing pin (54).

4. A concrete pipe casting core shrinking demoulding production line according to claim 3, characterized in that: Tension springs (55) are welded to the right ends of the front and rear sides of the second inner supporting square column (52), the left end of the tension spring (55) is welded to the limiting clamp (53), the top of the limiting clamp (53) is fixedly connected to a hanging chain (56), the top of the hanging chain (56) is fixedly connected to the bottom end of the hanging rod (46), and the front and rear sides of the second inner supporting square column (52) are fixedly connected to a stop pin (57), the surface of the stop pin (57) is tightly fitted with the right side of the limiting clamp (53).

5. A concrete pipe casting core shrinking demoulding production line according to claim 4, characterized in that: An inner support assembly (5) is provided between the two side formworks (42), outer formworks (6) are provided on both sides of the top of the casting base (2), a suspension rod (46) is provided through the top of the connecting seat (44), a first spring (47) is sleeved on the surface of the suspension rod (46), and the top and bottom ends of the first spring (47) are respectively welded to the connecting seat (44) and the suspension rod (46).

6. A concrete pipe casting core shrinking demoulding production line according to claim 5, characterized in that: The demoulding assembly (9) comprises rectangular slide grooves (91) provided on both sides of the demoulding base (3); the inner cavity of the rectangular slide groove (91) is slidably connected to a slide seat (92); and the inner cavity of the rectangular slide groove (91) on the left side is rotatably connected to a bidirectional threaded rod (93) via a bearing.

7. A concrete pipe casting core shrinking demoulding production line according to claim 6, characterized in that: The right end of the bidirectional threaded rod (93) passes through the right side of the demoulding base (3), a stepping motor (94) is fixedly mounted on the right side of the demoulding base (3), and the right end of the bidirectional threaded rod (93) is fixedly connected to the output shaft of the stepping motor (94).

8. A concrete pipe casting core shrinking demoulding production line according to claim 7, characterized in that: The top of the sliding seat (92) is fixedly connected to a docking seat (95), the bottom of the sliding seat (7) is fixedly connected to a docking joint (96), both sides of the bottom of the casting base (2) are provided with arc-shaped through holes (98) adapted to the docking seat (95), and the bottom end of the docking joint (96) passes through the arc-shaped through hole (98) and is inserted into the inner cavity of the docking seat (95).

9. A concrete pipe casting core shrinking demoulding production line according to claim 8, characterized in that: The front and rear ends of both sides of the top of the demoulding base (3) are fixedly connected with extrusion protrusions (97), and the extrusion protrusions (97) are engaged in the inner cavity of the rectangular groove (81).

10. A concrete pipe casting core shrinking demoulding production line according to claim 9, characterized in that: Two sets of quick locks (10) are installed on the front and rear sides of the two outer templates (6).

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