A demoulding device and method for pouring concrete inspection well pipe

Abstract

The present invention discloses a demoulding device and method for pouring concrete inspection well pipes, and belongs to the technical field of demoulding for pouring inspection well pipes. The pouring demoulding device includes a self-propelled truss located at the top of an underground pouring workshop, an outer mold is arranged at the bottom of the inner cavity of the underground pouring workshop, a lifting plate is arranged above the outer mold, a cross hanger is fixedly connected to the bottom of the lifting plate, a hanging assembly is arranged in the inner cavity of the lifting plate, and the hanging assembly includes a limiting slide groove opened at the four corners of the top of the cross hanger, and the four corners of the top of the cross hanger are rotatably connected with gears. The present invention positions and clamps the outer mold through the coordinated use of the truss, the lifting plate, the cross hanger and the hanging assembly, and then completes the lifting and automatic demoulding of the outer mold through the coordinated use of the demoulding assembly and the lifting assembly, so as to achieve the purposes of automatic lifting demoulding, adjustable clamping size and high demoulding efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of casting and demoulding of inspection well pipes, and in particular relates to a device and method for casting and demoulding of concrete inspection well pipes. Background Art

[0002] Inspection well pipe molds are generally divided into inner molds and outer molds. The inner mold determines the internal shape and size of the inspection well pipe, and needs to have high roundness and smoothness to ensure the smoothness of the inner wall of the inspection well pipe. The outer mold affects the external contour and appearance quality of the inspection well pipe. The mold material is mostly steel, which has sufficient strength and rigidity to withstand the huge pressure during concrete pouring without deformation. Demolding refers to the process of removing the molded product from the mold cavity. In many manufacturing industries, such as concrete products (such as inspection well pipe pouring), demolding is involved.

[0003] In the field of inspection well pipe production, large lifting equipment is generally required for lifting some large or heavy external molds when demolding. However, when using such equipment for demolding, manual control and alignment of the lifting position is required, which makes disassembly and assembly difficult and consumes a lot of manpower and time. In addition, inspection well pipes of different sizes need to be adapted to different demolding devices or perform complex adjustments, which lack versatility and flexibility. Therefore, it is necessary to provide a concrete inspection well pipe casting demolding device and method, which adopts automatic alignment and automatic release to quickly complete the docking operation of the lifting position. At the same time, the variable diameter lifting structure can adapt to the demolding process of molds of different sizes, thereby improving the demolding efficiency and flexibility of use. Summary of the invention

[0004] The purpose of the present invention is to provide a concrete inspection well pipe casting demoulding device and method, which adopts automatic alignment and automatic release to quickly complete the docking operation at the lifting position. At the same time, the variable diameter lifting structure can adapt to the demoulding process of molds of different sizes, thereby improving the demoulding efficiency and flexibility of use to solve the above-mentioned technical problems.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a concrete inspection well pipe casting and demolding device, comprising a truss located at the top of an underground casting workshop and capable of self-propelled, an outer mold is arranged at the bottom of the inner cavity of the underground casting workshop, a lifting plate is arranged above the outer mold, a cross hanger is fixedly connected to the bottom of the lifting plate, a hanging assembly is arranged in the inner cavity of the lifting plate, the hanging assembly comprises limiting slide grooves arranged at the four corners of the top of the cross hanger, the four corners of the top of the cross hanger are rotatably connected to gears, a sliding frame is slidably connected to the inner cavity of the limiting slide groove, and the top of the sliding frame is fixedly connected There is a rack, and the inner cavity of the lifting plate is rotatably connected to a gear ring, the sliding frame and the gear ring are meshed, and the sliding frame is fixedly connected to a fixed frame at one end away from the cross hanger, and the inner cavity of the fixed frame is rotatably connected to a hanger, and four lifting ears are distributed in a ring on the top of the outer mold surface, and the lifting ears are welded to the outer mold, and the hanger is engaged in the inner cavity of the lifting ears, and a first stepper motor is fixedly installed on one side of the top of the lifting plate, and the output shaft of the first stepper motor passes through the inner cavity of the lifting plate and is fixedly connected to the gear, a demolding assembly is provided on the top of the truss, and lifting assemblies are provided on both sides of the bottom of the truss.

[0006] Preferably, the demoulding assembly includes a fixed plate welded to the top of the truss, a rotatable rotating tube is provided through the top of the fixed plate, a first oil cylinder is fixedly installed in the inner cavity of the rotating tube, and an output end of the first oil cylinder is fixedly connected to the lifting plate.

[0007] Preferably, a second stepper motor is fixedly installed on the left side of the truss inner cavity, the output shaft of the second stepper motor is connected to the top of the fixed plate, the output shaft of the second stepper motor and the surface of the rotating tube are fixedly connected with a belt pulley, and the two belt pulleys are connected by belt drive.

[0008] Preferably, the surface of the lifting plate is annularly distributed with four rectangular holes adapted to the rack, the four corners of the cross hanger are fixedly connected with limit stops, and the side of the hanger close to the cross hanger is tightly fitted with the limit stop.

[0009] Preferably, the lifting assembly includes a traveling frame slidably connected to both sides of the top of the underground casting workshop, a second oil cylinder is fixedly installed on the top of the traveling frame, the output end of the second oil cylinder is fixedly connected to the truss, and both sides of the top of the underground casting workshop are laid with limiting guide rails compatible with the traveling frame.

[0010] Preferably, the front and rear sides of the top of the walking frame are fixedly connected to limit tubes, the front and rear ends of both sides of the bottom of the truss are fixedly connected to limit columns, and the limit tubes are slidably connected to the surfaces of the limit columns.

[0011] Preferably, a rectangular slot is provided on the top of the hanger, a torsion spring is provided in the inner cavity of the rectangular slot, one end of the torsion spring is welded to the inner wall of the rectangular slot, and the other end of the torsion spring is welded to the fixing frame.

[0012] Preferably, a support plate is provided at the bottom of the outer mold, and the support plate is clamped on the bottom of the outer mold. Four quick clamps are distributed in a ring shape at the bottom of the outer mold surface.

[0013] Preferably, the quick clamp is fixedly connected to the outer mold, four limit clamps are annularly distributed on the surface of the support plate, the limit clamps are welded to the support plate, and the bottom end of the quick clamp is buckled in the inner cavity of the limit clamp.

[0014] A demoulding method for pouring a concrete inspection well pipe, wherein the demoulding method comprises the following steps:

[0015] Step 1: The demoulding device is used for inspecting the underground demoulding process of the well pipe. During use, the truss is first driven to move on the top of the underground casting workshop by the walking frame, so that the truss can drive the lifting plate to reach the top of the outer mold, and then the first oil cylinder is opened and pushes the lifting plate downward to move. During the descent, the lifting plate drives the cross hanger to move downward, so that the hanger is displaced downward, and the bottom of the hanger is in contact with the top of the lifting ear. The hanger rotates due to the blocking effect of the lifting ear, and the torsion spring is compressed. After the bottom end of the hanger reaches the horizontal height of the inner cavity of the lifting ear, the torsion spring rebounds and drives the hanger to reset, so that the bottom end of the hanger is engaged in the inner cavity of the lifting ear. At this time, the outer mold is connected to the cross hanger through the coordinated use of the hanger and the lifting ear.

[0016] In actual use, the demoulding device can perform demoulding operations on external molds of different sizes. By turning on the first stepper motor, the first stepper motor drives the gear on the left to rotate, thereby causing the gear ring to rotate in the inner cavity of the lifting plate. At this time, the other three gears rotate simultaneously under the meshing transmission of the gear ring. Due to the meshing transmission of the gear and the rack, the four racks slide in the inner cavity of the limiting slide groove, so that the four fixing frames can move back or toward each other at the same time, thereby adjusting the buckling size of the four hangers;

[0017] Step 2: Then, the user first rotates the quick clamp so that the bottom end of the quick clamp is separated from the inner cavity of the limit clamp, so that the support plate and the outer mold are separated, and then the first oil cylinder drives the lifting plate to lift upward, so that the lifting plate drives the hanger to rise upward through the cross hanger, and drives the outer mold to rise upward with the cooperation of the lifting ears, so that the outer mold first separates from the surface of the support plate, and after the lifting stroke of the first oil cylinder is completed, the second oil cylinder is opened and lifts the truss upward, so that the truss and the rotating tube and the first oil cylinder continue to rise upward, and finally, with the cooperation of the lifting plate, the cross hanger and the hanger, the outer mold rises to the highest point, and then the walking frame drives the truss to move, and drives the fixed plate, the lifting plate, the cross hanger and the outer mold to move to the rear side, so that the outer mold can be lifted to the side, and the final demoulding is completed;

[0018] Step 3. Finally, the second oil cylinder and the first oil cylinder are reset at the same time, so that the truss is reset downward, and then the hanging outer mold is lowered until the bottom of the outer mold contacts the bottom of the inner cavity of the underground casting workshop. The first oil cylinder continues to push downward, so that the bottom end of the hanger is separated from the inner cavity of the lifting ear. Then the second stepper motor is turned on and drives the rotating tube to rotate through the coordinated use of two pulleys and belts. The rotating tube drives the first oil cylinder to rotate during the rotation process, so that the first oil cylinder drives the lifting plate to rotate. The lifting plate drives the cross hanger and the fixed frame to rotate during the rotation process. The fixed frame drives the hanger to move during the displacement process, so that the hanger is separated from the contact with the lifting ear, so that the hanger and the lifting ear are completely separated.

[0019] The beneficial effects of the present invention are as follows: the present invention positions and clamps the outer mold through the coordinated use of a truss, a lifting plate, a cross hanger and a hanging assembly, and then completes the lifting and automatic demolding of the outer mold through the coordinated use of a demolding assembly and a lifting assembly, thereby achieving the purposes of automatic lifting and demolding, adjustable clamping size and high demolding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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:

[0021] Figure 1 A schematic top view of an embodiment of the present invention;

[0022] Figure 2 A three-dimensional schematic diagram of an embodiment of the present invention;

[0023] Figure 3 This is a three-dimensional schematic diagram of a mold, a lifting plate and a hanging assembly according to an embodiment of the present invention;

[0024] Figure 4A three-dimensional schematic diagram of a mold and a quick clamp according to an embodiment of the present invention;

[0025] Figure 5 It is a three-dimensional schematic diagram of a lifting plate, a cross hanger and a hanging assembly according to an embodiment of the present invention;

[0026] Figure 6 It is a three-dimensional exploded view of a lifting plate, a cross hanger and a hanging assembly according to an embodiment of the present invention;

[0027] Figure 7 It is a three-dimensional schematic diagram of a truss, a demoulding assembly and a lifting assembly according to an embodiment of the present invention;

[0028] Figure 8 It is a three-dimensional schematic diagram of a truss and a demoulding assembly according to an embodiment of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] 1. Underground casting workshop, 2. Truss, 3. External mold, 4. Lifting plate, 5. Cross hanger, 6. Hanging assembly, 61. Limit slide, 62. Gear, 63. Sliding frame, 64. Rack, 65. Gear ring, 66. Fixed frame, 67. Lifting fixture, 68. Lifting ear, 69. First stepper motor, 7. Demoulding assembly, 71. Fixed plate, 72. Rotating tube, 73. First oil cylinder, 74. Second stepper motor, 75. Belt pulley, 8. Lifting assembly, 81. Traveling frame, 82. Second oil cylinder, 83. Limiting tube, 84. Limiting column, 9. Rectangular slot, 10. Torsion spring, 11. Support plate, 12. Quick clamp, 13. Limiting holder. DETAILED DESCRIPTION

[0031] Hereinafter, embodiments of a concrete inspection well pipe casting and demoulding device and method of the present invention will be described with reference to the accompanying drawings.

[0032] 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.

[0033] 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.

[0034] Embodiment 1: Figure 1-8 The present invention shows a concrete inspection well pipe casting and demoulding device according to an embodiment of the present invention, comprising a self-propelled truss 2 located at the top of an underground casting workshop 1, an outer mold 3 is arranged at the bottom of the inner cavity of the underground casting workshop 1, a support plate 11 is arranged at the bottom of the outer mold 3, the support plate 11 is clamped at the bottom of the outer mold 3, four quick clamps 12 are distributed in an annular manner on the bottom of the surface of the outer mold 3, the quick clamps 12 are fixedly connected to the outer mold 3, four limit clamps 13 are distributed in an annular manner on the surface of the support plate 11, the limit clamps 13 are welded to the support plate 11, and the bottom end of the quick clamp 12 is buckled on the limit clamps 13. The inner cavity of the positioning card seat 13, through the coordinated use of the quick clamp 12 and the limiting card seat 13, realizes the rapid mold closing and demoulding of the support plate 11 and the outer mold 3, thereby improving the casting efficiency of the inspection well pipe by the user. A lifting plate 4 is arranged above the outer mold 3, and a cross hanger 5 is fixedly connected to the bottom of the lifting plate 4. A hanging assembly 6 is arranged in the inner cavity of the lifting plate 4. The hanging assembly 6 includes a limiting slide groove 61 opened at the four corners of the top of the cross hanger 5. The four corners of the top of the cross hanger 5 are rotatably connected to the gear 62, and the inner cavity of the limiting slide groove 61 is slidably connected to the sliding frame 63, the top of the sliding frame 63 is fixedly connected with a rack 64, and the surface of the lifting plate 4 is annularly distributed with four rectangular holes adapted to the rack 64. The four corners of the cross hanger 5 are fixedly connected with limited stoppers, and the side of the hanger 67 close to the cross hanger 5 is tightly fitted with the limited stopper. The inner cavity of the lifting plate 4 is rotatably connected with a gear ring 65, and the sliding frame 63 is meshed with the gear ring 65. The end of the sliding frame 63 away from the cross hanger 5 is fixedly connected with a fixed frame 66, and the inner cavity of the fixed frame 66 is rotatably connected with a hanger 67. The top of the hanger 67 is provided with a rectangular slot 9, and the rectangular slot The inner cavity of the groove 9 is provided with a torsion spring 10, one end of the torsion spring 10 is welded to the inner wall of the rectangular slot 9, and the other end of the torsion spring 10 is welded to the fixing frame 66. Four lifting ears 68 are distributed in a ring on the top of the surface of the outer mold 3, and the lifting ears 68 are welded to the outer mold 3. The hanger 67 is engaged in the inner cavity of the lifting ears 68. A first stepper motor 69 is fixedly installed on one side of the top of the lifting plate 4. The output shaft of the first stepper motor 69 passes through the inner cavity of the lifting plate 4 and is fixedly connected to the gear 62. A demolding assembly 7 is provided on the top of the truss 2, and lifting assemblies 8 are provided on both sides of the bottom of the truss 2.

[0035] Embodiment 2: It is basically the same as Embodiment 1, and furthermore, the demoulding assembly 7 includes a fixed plate 71 welded to the top of the truss 2, a rotatable rotating tube 72 is provided through the top of the fixed plate 71, a first oil cylinder 73 is fixedly installed in the inner cavity of the rotating tube 72, and the output end of the first oil cylinder 73 is fixedly connected to the lifting plate 4, a second stepper motor 74 is fixedly installed on the left side of the inner cavity of the truss 2, the output shaft of the second stepper motor 74 is connected to the top of the fixed plate 71, and the output shaft of the second stepper motor 74 and the surface of the rotating tube 72 are fixedly connected with a belt pulley 75, two The belt pulley 75 is connected through a belt drive. Through the arrangement of the demoulding component 7, the fixed plate 71 and the first oil cylinder 73 are used in conjunction with each other to lift the lifting plate 4 up and down, so that the lifting plate 4 can drive the hanger 67 to reach the specified buckling position through the cross hanger 5. At the same time, with the cooperation of the rotating tube 72, the second stepper motor 74 and the belt pulley 75, the fixed plate 71 is driven to rotate, so that the hanger 67 can be rotated and disengaged after being separated from the inner cavity of the lifting ear 68, thereby causing the hanger 67 to break contact with the outer mold 3.

[0036] Embodiment 3: It is basically the same as Embodiment 1, and furthermore, the lifting assembly 8 includes a traveling frame 81 slidably connected to both sides of the top of the underground casting workshop 1, a second oil cylinder 82 is fixedly installed on the top of the traveling frame 81, and the output end of the second oil cylinder 82 is fixedly connected to the truss 2. Both sides of the top of the underground casting workshop 1 are paved with limit guide rails adapted to the traveling frame 81, the front and rear sides of the top of the traveling frame 81 are fixedly connected to the limit pipe 83, and the front and rear ends of both sides of the bottom of the truss 2 are fixedly connected to the limit column 84, and the limit pipe 83 is slidably connected to the surface of the limit column 84. Through the setting of the lifting assembly 8, the second oil cylinder 82 and the traveling frame 81 are used in combination, which plays a secondary propulsion role on the truss 2 and the lifting plate 4, so that the outer mold 3 has a sufficient rising demoulding stroke, so that the outer mold 3 can be demoulded quickly, and at the same time, the limit pipe 83 and the limit column 84 are used in combination, which plays a role of limiting and guiding the truss 2, thereby improving the stability of the truss 2 during the lifting process.

[0037] A demoulding method for pouring a concrete inspection well pipe, wherein the demoulding method comprises the following steps:

[0038] Step 1: The demoulding device is used for inspecting the underground demoulding process of the well pipe. During use, the truss 2 is first driven to move on the top of the underground casting workshop 1 by the walking frame 81, so that the truss 2 can drive the lifting plate 4 to reach the top of the outer mold 3, and then the first oil cylinder 73 is opened and pushes the lifting plate 4 downward to move. The lifting plate 4 drives the cross hanger 5 to move downward during the descent, so that the hanger 67 moves downward, and the bottom of the hanger 67 contacts the top of the ear 68. The hanger 67 rotates under the blocking effect of the ear 68, and the torsion spring 10 is compressed. After the bottom end of the hanger 67 reaches the horizontal height of the inner cavity of the ear 68, the torsion spring 10 rebounds and drives the hanger 67 to reset, so that the bottom end of the hanger 67 is engaged in the inner cavity of the ear 68. At this time, the outer mold 3 is connected to the cross hanger 5 through the cooperation of the hanger 67 and the ear 68.

[0039] In actual use, the demoulding device can perform demoulding operations on outer molds 3 of different sizes. By turning on the first stepper motor 69, the first stepper motor 69 drives the gear 62 on the left to rotate, thereby causing the gear ring 65 to rotate in the inner cavity of the lifting plate 4. At this time, the other three gears 62 rotate simultaneously under the meshing transmission of the gear ring 65. Due to the meshing transmission of the gear 62 and the rack 64, the four racks 64 slide in the inner cavity of the limiting slide 61, so that the four fixing frames 66 can move back or toward each other at the same time, thereby adjusting the buckling size of the four hangers 67.

[0040] The first oil cylinder 73 drives the lifting plate 4 to move upward, and the lifting plate 4 drives the hanger 67 to rise upward through the cross hanger 5, and drives the outer mold 3 to rise upward with the cooperation of the lifting lug 68, so that the outer mold 3 first separates from the surface of the supporting plate 11. After the lifting stroke of the first oil cylinder 73 is completed, the second oil cylinder 82 is opened and lifts the truss 2 upward, so that the truss 2 and the rotating tube 72 and the first oil cylinder 73 continue to rise upward. Finally, with the cooperation of the lifting plate 4, the cross hanger 5 and the hanger 67, the outer mold 3 rises to the highest point. Then the walking frame 81 drives the truss 2 to move, and drives the fixed plate 71, the lifting plate 4, the cross hanger 5 and the outer mold 3 to move to the rear side, so that the outer mold 3 can be lifted to the side, and the final demoulding is completed.

[0041] Step 3. Finally, the second oil cylinder 82 and the first oil cylinder 73 are reset at the same time, so that the truss 2 is reset downward, and then the suspended outer mold 3 is lowered. Until the bottom of the outer mold 3 contacts the bottom of the inner cavity of the underground casting workshop 1, the first oil cylinder 73 continues to push downward, so that the bottom end of the hanger 67 is separated from the inner cavity of the lifting ear 68, and then the second stepper motor 74 is turned on and drives the rotating tube 72 to rotate through the cooperation of two belt pulleys 75 and the belt. The rotating tube 72 drives the first oil cylinder 73 to rotate during the rotation process, so that the first oil cylinder 73 drives the lifting plate 4 to rotate, and the lifting plate 4 drives the cross hanger 5 and the fixed frame 66 to rotate during the rotation process. The fixed frame 66 drives the hanger 67 to displace during the displacement process, so that the hanger 67 is separated from the contact with the lifting ear 68, so that the hanger 67 and the lifting ear 68 are completely separated.

[0042] In summary: the concrete inspection well pipe casting demoulding device and method, through the coordinated use of the truss 2, the lifting plate 4, the cross hanger 5 and the hanging assembly 6, the outer mold 3 is positioned and clamped, and then the demoulding assembly 7 and the lifting assembly 8 are used to complete the lifting and automatic demoulding of the outer mold 3, thereby achieving the purposes of automatic lifting and demoulding, adjustable clamping size and high demoulding efficiency.

[0043] The technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A demoulding device for pouring concrete inspection well pipe, characterized in that: The invention comprises a self-propelled truss (2) located at the top of an underground casting workshop (1), wherein an outer mold (3) is arranged at the bottom of the inner cavity of the underground casting workshop (1), a lifting plate (4) is arranged above the outer mold (3), a cross hanger (5) is fixedly connected to the bottom of the lifting plate (4), a hanging assembly (6) is arranged in the inner cavity of the lifting plate (4), the hanging assembly (6) comprises a limiting slide groove (61) provided at the four corners of the top of the cross hanger (5), the four corners of the top of the cross hanger (5) are rotatably connected to gears (62), the inner cavity of the limiting slide groove (61) is slidably connected to a sliding frame (63), the top of the sliding frame (63) is fixedly connected to a rack (64), the lifting plate (4 ) is rotatably connected to the inner cavity of the lifting plate (4), the sliding frame (63) and the gear ring (65) are meshed, the sliding frame (63) is fixedly connected to the fixed frame (66) at one end away from the cross hanger (5), the inner cavity of the fixed frame (66) is rotatably connected to the hanging device (67), the top of the surface of the outer mold (3) is annularly distributed with four lifting ears (68), the lifting ears (68) are welded to the outer mold (3), and the hanging device (67) is engaged in the inner cavity of the lifting ears (68), and a first stepper motor (69) is fixedly installed on one side of the top of the lifting plate (4), the output shaft of the first stepper motor (69) passes through the inner cavity of the lifting plate (4) and is fixedly connected to the gear (62), the top of the truss (2) A demoulding assembly (7) is provided at the top of the truss (2), the demoulding assembly (7) comprising a fixed plate (71) welded to the top of the truss (2), a rotatable rotating tube (72) is provided through the top of the fixed plate (71), a first oil cylinder (73) is fixedly installed in the inner cavity of the rotating tube (72), the output end of the first oil cylinder (73) is fixedly connected to the lifting plate (4), a second stepping motor (74) is fixedly installed on the left side of the inner cavity of the truss (2), the output shaft of the second stepping motor (74) is connected to the top of the fixed plate (71), the output shaft of the second stepping motor (74) and the surface of the rotating tube (72) are fixedly connected with a belt pulley (75), and the two belt pulleys (75) are connected by a belt drive. A lifting assembly (8) is provided on both sides of the bottom of the truss (2), and the lifting assembly (8) includes a walking frame (81) slidably connected to both sides of the top of the underground casting workshop (1), a second oil cylinder (82) is fixedly installed on the top of the walking frame (81), and the output end of the second oil cylinder (82) is fixedly connected to the truss (2), and both sides of the top of the underground casting workshop (1) are paved with limiting guide rails compatible with the walking frame (81), and the front and rear sides of the top of the walking frame (81) are fixedly connected to the limiting tube (83), and the front and rear ends of both sides of the bottom of the truss (2) are fixedly connected to the limiting column (84), and the limiting tube (83) is slidably connected to the surface of the limiting column (84).

2. A concrete inspection well pipe casting and demoulding device according to claim 1, characterized in that: The surface of the lifting plate (4) is provided with four rectangular holes that are matched with the rack (64) in an annular manner. The four corners of the cross hanger (5) are fixedly connected to limit stops. The side of the hanger (67) close to the cross hanger (5) is tightly fitted with the limit stop.

3. A demoulding device for pouring and demoulding a concrete inspection well pipe according to claim 2, characterized in that: A rectangular slot (9) is provided on the top of the hanger (67), a torsion spring (10) is provided in the inner cavity of the rectangular slot (9), one end of the torsion spring (10) is welded to the inner wall of the rectangular slot (9), and the other end of the torsion spring (10) is welded to the fixing frame (66).

4. A concrete inspection well pipe casting and demoulding device according to claim 3, characterized in that: A support plate (11) is provided at the bottom of the outer mould (3), and the support plate (11) is engaged with the bottom of the outer mould (3). Four quick clamps (12) are distributed in a ring shape at the bottom of the surface of the outer mould (3).

5. A concrete inspection well pipe casting and demoulding device according to claim 4, characterized in that: The quick clamp (12) is fixedly connected to the outer mold (3); four limit clamps (13) are distributed in an annular manner on the surface of the support plate (11); the limit clamps (13) are welded to the support plate (11); and the bottom end of the quick clamp (12) is buckled in the inner cavity of the limit clamp (13).

6. A method for demoulding a concrete manhole pipe casting, which is applied to the demoulding device for casting a concrete manhole pipe according to any one of claims 1 to 5, characterized in that: The demoulding steps are as follows: Step 1: The demoulding device is used for inspecting the underground demoulding process of the well pipe. During use, the walking frame (81) first drives the truss (2) to move on the top of the underground casting workshop (1), so that the truss (2) can drive the lifting plate (4) to reach the top of the outer mold (3). Then, the first oil cylinder (73) is opened and pushes the lifting plate (4) downward to move. During the descent process, the lifting plate (4) drives the cross hanger (5) to move downward, so that the hanger (67) moves downward, and the hanger (67) moves downward. The bottom of the hanger (67) contacts the top of the lifting ear (68), and the hanger (67) rotates due to the blocking effect of the lifting ear (68), and the torsion spring (10) is compressed. After the bottom end of the hanger (67) reaches the horizontal height of the inner cavity of the lifting ear (68), the torsion spring (10) rebounds and drives the hanger (67) to reset, so that the bottom end of the hanger (67) is engaged in the inner cavity of the lifting ear (68). At this time, the outer mold (3) is connected to the cross hanger (5) through the cooperation of the hanger (67) and the lifting ear (68); In actual use, the demoulding device can perform demoulding operations on external molds (3) of different sizes. By turning on the first stepper motor (69), the first stepper motor (69) drives the gear (62) located on the left side to rotate, thereby causing the gear ring (65) to rotate in the inner cavity of the lifting plate (4). At this time, the other three gears (62) rotate simultaneously under the meshing transmission action of the gear ring (65). Due to the meshing transmission action of the gear (62) and the rack (64), the four racks (64) all slide in the inner cavity of the limiting slide groove (61), so that the four fixing frames (66) can move back or towards each other at the same time, thereby allowing the buckling size of the four hangers (67) to be adjusted; Step 2: Next, the user first rotates the quick clamp (12) so that the bottom end of the quick clamp (12) is separated from the inner cavity of the limit clamp (13), so that the support plate (11) and the outer mold (3) are separated. Then, the first oil cylinder (73) drives the lifting plate (4) to lift upward, so that the lifting plate (4) drives the hanger (67) to rise upward through the cross hanger (5), and drives the outer mold (3) to rise upward with the cooperation of the lifting ear (68), so that the outer mold (3) is first separated from the surface of the support plate (11), and wait until the rising stroke of the first oil cylinder (73) is completed. After completion, the second oil cylinder (82) is opened and lifts the truss (2) upward, so that the truss (2) and the rotating tube (72) and the first oil cylinder (73) continue to rise upward, and finally, with the cooperation of the lifting plate (4), the cross hanger (5) and the lifting device (67), the outer mold (3) is lifted to the highest point, and then the walking frame (81) drives the truss (2) to move, and drives the fixed plate (71), the lifting plate (4), the cross hanger (5) and the outer mold (3) to move to the rear side, so that the outer mold (3) can be lifted to the side, completing the final demoulding; Step 3. Finally, the second oil cylinder (82) and the first oil cylinder (73) are reset simultaneously, so that the truss (2) is reset downward, and then the suspended outer mold (3) is lowered until the bottom of the outer mold (3) contacts the bottom of the inner cavity of the underground casting workshop (1). The first oil cylinder (73) continues to push downward, so that the bottom end of the hanger (67) is separated from the inner cavity of the lifting ear (68). Then the second stepper motor (74) is turned on and driven by the cooperation of the two belt pulleys (75) and the belt. The rotating tube (72) rotates, and during the rotation process, the rotating tube (72) drives the first oil cylinder (73) to rotate, so that the first oil cylinder (73) drives the lifting plate (4) to rotate, and during the rotation process, the lifting plate (4) drives the cross hanger (5) and the fixed frame (66) to rotate, and during the displacement process, the fixed frame (66) drives the sling (67) to move, so that the sling (67) is separated from the contact with the lifting ear (68), so that the sling (67) and the lifting ear (68) are completely separated.

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