Side-hung sliding type concrete sewage inspection well demolding device and method

Abstract

The invention discloses a side-hung sliding type concrete sewage inspection well demolding device and method, and belongs to the technical field of sewage inspection well machining. The device comprises a pouring base, sliding seats capable of sliding are arranged on the two sides of the top of the pouring base, and outer molds are fixedly connected to the tops of the sliding seats; an inner mold is arranged at the top of the pouring base, a shrinkage assembly is arranged in an inner cavity of the inner mold, rotating supports are fixedly connected to the two ends of the front side of the pouring base through bolts, and rotating sleeves are arranged at the two ends of the front side of the pouring base. Through cooperative use of the sliding seat, the rotating sleeve and the driving assembly, the outer mold is opened and closed in parallel, so that the inner wall of the outer mold is separated from the surface of the sewage inspection well, and meanwhile, through cooperative use of the shrinking assembly, the inner diameter of the inner mold is shrunk, so that the surface of the inner mold is separated from the inner wall of the sewage inspection well; the purposes of horizontal sliding demolding, small product surface damage and rapid and convenient mold opening and closing can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage inspection well processing, and in particular relates to a demoulding device and method for a flat-opening sliding concrete sewage inspection well. Background Art

[0002] Sewage inspection wells are underground structures set up for easy installation and maintenance of urban underground infrastructure such as power supply, water supply, drainage, sewage, communications, cable TV, gas pipes, and street light lines. Concrete sewage inspection wells are an important structure used in urban underground infrastructure and are usually made of concrete materials. Concrete sewage inspection wells are vertical well-shaped structures set up for inspection, maintenance, and upkeep of urban underground pipeline systems.

[0003] In the process of demoulding the concrete sewage inspection well, direct lifting and demoulding or forced demoulding with simple tools will inevitably produce large collisions and frictions between the mold and the surface of the concrete sewage inspection well, resulting in scratches, breakages and other defects on the surface of the sewage inspection well, affecting its appearance quality. In addition, when demoulding a large sewage inspection well, there is often a large resistance in the process of opening and closing the mold, resulting in slow opening and closing speeds and lack of certain demoulding flexibility. For this reason, it is necessary to provide a flat-opening sliding concrete sewage inspection well demoulding device and method, which adopts a horizontal sliding mold opening structure to reduce friction and collision between the mold and the product, and adopts a foot-operated mold opening and closing structure to reduce sliding resistance and labor cost investment. Summary of the invention

[0004] The purpose of the present invention is to provide a flat-opening sliding concrete sewage inspection well demoulding device and method, which adopts a horizontal sliding mold opening structure to reduce the friction and collision between the mold and the product, and adopts a foot-operated mold opening and closing structure to reduce the sliding resistance and labor cost investment, so as to solve the above technical problems.

[0005] The technical solution of the present invention to solve the above technical problems is as follows: a flat-opening sliding concrete sewage inspection well demoulding device, the device includes a casting base: slidable sliding seats are arranged on both sides of the top of the casting base, the top of the sliding seat is fixedly connected with an outer mold, the top of the casting base is arranged with an inner mold, the inner cavity of the inner mold is provided with a shrinkage component, both ends of the front side of the casting base are fixedly connected with a rotating support by bolts, both ends of the front side of the casting base are provided with a rotating sleeve, the inner cavity of the rotating sleeve is provided with a driving component, the driving component includes a driving rod rotatably connected to both sides of the inner cavity of the casting base, and the front and rear sides of the driving rod surface are fixedly connected There is a gear, and the front and rear sides of the bottom of the sliding seat are fixedly connected with racks, the gears and racks are meshed, the top and bottom of the rotating sleeve are fixedly connected with fixed frames, the inner cavity of the driving rod is penetrated by a slidable toggle pin, the front end of the driving rod penetrates to the front side of the casting base and extends to the inner cavity of the rotating sleeve, the front side of the driving rod surface is fixedly connected with a toothed disk, the toggle pin and the toothed disk are meshed, the surface sleeve of the toggle pin is provided with a spring, one end of the spring is welded to the toggle pin, and the other end of the spring is welded to the fixed frame, pedals are fixedly connected to both sides of the rotating sleeve, a tension spring is welded to the bottom of the pedal, and the bottom end of the tension spring is welded to the casting base.

[0006] Preferably, the shrinkage assembly includes a rotating column rotatably connected to the top of the casting base, a split opening is opened on the left side of the inner mold, and two first tie rods and a second tie rod are rotatably connected to the surface of the rotating column. The first tie rod and the second tie rod are rotatably connected to the inner wall of the inner mold at one end away from the rotating column.

[0007] Preferably, the bottom end of the rotating column penetrates into the inner cavity of the casting base and is fixedly connected to a worm gear, the front end of the casting base is penetrated by a rotatable worm, and the rear end of the worm penetrates into the inner cavity of the casting base and meshes with the worm gear.

[0008] Preferably, an operating rod is fixedly connected to the front end of the worm, and a reserved sliding groove adapted to the rotating column is provided on a side of the top of the first pull rod close to the rotating column.

[0009] Preferably, the rear end of the rotating sleeve passes through between the two rotating supports on the same side, and the rotating sleeve is rotatably connected to the inner cavities of the two rotating supports on the same side.

[0010] Preferably, the top and the bottom of the rotating sleeve are fixedly connected to the limiting tube, and the driving pin is slidably connected to the inner cavity of the limiting tube.

[0011] Preferably, the front side and the rear side of the surface of the push pin are fixedly connected to the limit block, and the front side and the rear side of the limit tube are provided with positioning grooves matched with the limit block.

[0012] Preferably, the front and rear sides of the bottom of the sliding seat are fixedly connected to the limiting guide rails, and both ends of the front and rear sides of the top of the casting base are provided with limiting sliding grooves adapted to the limiting guide rails.

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

[0014] A demoulding method for a flat-open sliding concrete sewage inspection well, the method steps are as follows: Step 1: When demoulding, the user first pulls the toggle pin to compress the spring and disengage the toggle pin from the toothed disc. Then, the toggle pin is rotated 180 degrees and the toggle pin is released. Under the action of the spring rebound force, the toggle pin is reset again, so that the toggle pin's anti-return direction is changed. Driven by the toggle pin, the limit block is re-inserted into the inner cavity of the positioning groove to limit the toggle pin. Step 2: The user then unlocks the quick lock and steps on the pedal located in the movement direction of the sliding seat. The pedal drives the rotating sleeve to rotate. During the rotation of the rotating sleeve, the fixed frame and the limit block are used to drive the toggle pin to rotate. During the rotation, the toggle pin toggles the toothed disc, causing the toothed disc to rotate in the inner cavity of the rotating sleeve, thereby causing the driving rod to drive the two gears on its surface to rotate. During the rotation of the gear, the rack meshing with it is driven to slide. At this time, the sliding seat slides under the drive of the rack, thereby causing The outer mold moves on the top of the casting base, so that the outer mold is away from the surface of the inner mold. According to this operation method, the two outer molds are moved so that both of the outer molds are away from the surface of the inner mold. During a single step on the pedal, the tension spring is stretched. After the pedal is released, the pedal is reset under the tension of the tension spring, waiting for the second step. At the same time, the rotating sleeve rotates and drives the toggle pin to move. Under the action of the inclined surface of the end of the toggle pin close to the toothed disc, the toggle pin is extended and retracted and quickly returns to the original position. This reset process is promoted by the elastic force of the spring. Step three, the user then rotates the operating lever, and the operating lever drives the worm to rotate in the inner cavity of the casting base during the rotation process, and the worm drives the worm wheel meshing with it to rotate during the rotation process, and the worm wheel drives the rotating column to rotate in the inner cavity of the inner mold during the rotation process, and the rotating column simultaneously pulls the second pull rod and the first pull rod during the rotation process. Affected by the reserved slide groove and the reserved stroke, the second pull rod first causes a pulling force to the inner wall of the inner mold, causing the front side of the inner mold to shift first and become misaligned with the rear side of the inner mold. At this time, the split mouth is in a staggered state, and then the first pull rod generates a pulling force on the inner mold, causing the staggered angle at the split mouth to become larger, and the overall inner diameter of the inner mold is reduced, thereby causing the surface of the inner mold to separate from the wall of the sewage inspection well, thereby achieving demolding.

[0015] The beneficial effects of the present invention are as follows: through the coordinated use of a sliding seat, a rotating sleeve and a driving assembly, the present invention opens and closes the outer mold in parallel, so that the inner wall of the outer mold is separated from the surface of the sewage inspection well. At the same time, with the coordinated use of a shrinking assembly, the inner diameter of the inner mold is shrunk, so that its surface is separated from the inner wall of the sewage inspection well, thereby achieving the purposes of horizontal sliding demolding, little damage to the product surface and fast and convenient opening and closing of the mold. 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 three-dimensional schematic diagram of an embodiment of the present invention; Figure 2 It is a three-dimensional schematic diagram of a casting base, a shrinking assembly and a driving assembly according to an embodiment of the present invention; Figure 3 A three-dimensional schematic diagram of a mold and a shrinking assembly in one embodiment of the present invention; Figure 4 It is a three-dimensional exploded view of a shrinking assembly according to an embodiment of the present invention; Figure 5 A side cross-sectional view of an embodiment of the present invention; Figure 6 An embodiment of the present invention Figure 5 A partial enlarged view of point A; Figure 7 It is a three-dimensional schematic diagram of a rotating sleeve and a driving assembly according to an embodiment of the present invention; Figure 8 It is a three-dimensional exploded view of a rotating sleeve, a driving assembly and a rotating support according to an embodiment of the present invention; Fig. 9 It is a three-dimensional exploded view of a rotating sleeve and a driving assembly according to an embodiment of the present invention; Fig.10 An embodiment of the present invention Fig. 9 A partial enlarged view of point B in the middle.

[0017] In the accompanying drawings, the components represented by the reference numerals are as follows: 1. Casting base, 2. Sliding seat, 3. Outer mold, 4. Inner mold, 5. Shrinkage assembly, 51. Rotating column, 52. Split mouth, 53. First pull rod, 54. Second pull rod, 55. Worm gear, 56. Worm, 57. Operating lever, 58. Reserved slide groove, 6. Rotating support, 7. Rotating sleeve, 8. Driving assembly, 81. Driving rod, 82. Gear, 83. Rack, 84. Fixed frame, 85. Toggle pin, 86. Spring, 87. Toothed disc, 88. Pedal, 89. Tension spring, 9. Limiting tube, 10. Limiting block, 11. Positioning groove, 12. Limiting guide rail, 13. Limiting slide groove, 14. Quick lock. DETAILED DESCRIPTION

[0018] Hereinafter, embodiments of the demoulding device and method for a flat-opening and sliding concrete sewage inspection well of 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 construed 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 1-10The present invention shows a flat-open sliding concrete sewage inspection well demoulding device according to an embodiment of the present invention, which includes a casting base 1: slidable sliding seats 2 are arranged on both sides of the top of the casting base 1, the front and rear sides of the bottom of the sliding seat 2 are fixedly connected to the limiting guide rail 12, and both ends of the front and rear sides of the top of the casting base 1 are provided with limiting slide grooves 13 adapted to the limiting guide rail 12, and two quick locks 14 are installed on the front and rear sides of the two outer molds 3. The top of the sliding seat 2 is fixedly connected to the outer mold 3, and the top of the casting base 1 is provided with an inner mold 4, and the inner cavity of the inner mold 4 is provided with a shrinking component 5. Both ends of the front side of the casting base 1 are fixedly connected with a rotating support 6 by bolts, and both ends of the front side of the casting base 1 are provided with a rotating sleeve 7, and the rear end of the rotating sleeve 7 penetrates between the two rotating supports 6 on the same side, and the rotating sleeve 7 is rotatably connected to the inner cavity of the two rotating supports 6 on the same side. The top and bottom of the rotating sleeve 7 are fixedly connected to the limit tube 9, and the toggle pin 85 is slidably connected to the inner cavity of the limit tube 9. The inner cavity of the rotating sleeve 7 is provided with a driving assembly 8, and the driving assembly 8 includes a driving rod 81 rotatably connected to both sides of the inner cavity of the casting base 1, and the front and rear sides of the surface of the driving rod 81 are fixedly connected to the gear 82, and the sliding seat 2 The front and rear sides of the bottom are fixedly connected with racks 83, the gear 82 and the rack 83 are meshed, the top and bottom of the rotating sleeve 7 are fixedly connected with fixed frames 84, the inner cavity of the driving rod 81 is penetrated with a slidable toggle pin 85, the front and rear sides of the surface of the toggle pin 85 are fixedly connected with a limiting block 10, and the front and rear sides of the limiting tube 9 are provided with a positioning groove 11 adapted to the limiting block 10. Through the setting of the limiting tube 9, the toggle pin 85 is limited and guided, which improves the stability of the toggle pin 85 during sliding and toggling. At the same time, the cooperation of the limiting block 10 and the positioning groove 11 makes The driving rod 81 is used to limit and lock the angle of the toggle pin 85, so that the toggle pin 85 maintains an accurate toggle angle. The front end of the driving rod 81 passes through the front side of the casting base 1 and extends to the inner cavity of the rotating sleeve 7. The front side of the surface of the driving rod 81 is fixedly connected with a toothed disc 87, and the toggle pin 85 is meshed with the toothed disc 87. The surface of the toggle pin 85 is sleeved with a spring 86, one end of the spring 86 is welded to the toggle pin 85, and the other end of the spring 86 is welded to the fixed frame 84. Pedals 88 are fixedly connected to both sides of the rotating sleeve 7, and a tension spring 89 is welded to the bottom of the pedal 88, and the bottom end of the tension spring 89 is welded to the casting base 1.

[0022] Embodiment 2: It is basically the same as Embodiment 1, and furthermore, the shrinking assembly 5 includes a rotating column 51 rotatably connected to the top of the casting base 1, a split opening 52 is opened on the left side of the inner mold 4, and the surface of the rotating column 51 is rotatably connected to two first tie rods 53 and second tie rods 54, and the ends of the first tie rods 53 and the second tie rods 54 away from the rotating column 51 are rotatably connected to the inner wall of the inner mold 4, the bottom end of the rotating column 51 penetrates into the inner cavity of the casting base 1 and is fixedly connected to a worm gear 55, and the front end of the casting base 1 is penetrated by a rotatable worm 56, and the rear end of the worm 56 penetrates into the inner cavity of the casting base 1 and meshes with the worm gear 55, and the front end of the worm 56 is fixedly connected There is an operating rod 57, and a reserved slide groove 58 compatible with the rotating column 51 is opened on the side of the top of the first pull rod 53 close to the rotating column 51. Through the setting of the contraction component 5, the operating rod 57 and the worm 56 are used in combination to drive the worm wheel 55 to rotate. With the cooperation of the worm wheel 55 and the rotating column 51, a pulling force is generated on the first pull rod 53 and the second pull rod 54. At the same time, with the cooperation of the first pull rod 53 and the second pull rod 54, a pulling effect is exerted on the inner mold 4, thereby changing the inner diameter of the inner mold 4, so that the surface of the inner mold 4 is separated from the inner wall of the sewage inspection well, thereby facilitating the demoulding of the sewage inspection well.

[0023] A method for demoulding a flat-open sliding concrete sewage inspection well, the method steps are as follows: Step 1: When demoulding, the user first pulls the toggle pin 85 to compress the spring 86, and at the same time, the toggle pin 85 is disengaged from the toothed disc 87. Then, the toggle pin 85 is rotated 180 degrees and the toggle pin 85 is released. Under the action of the rebound force of the spring 86, the toggle pin 85 is reset again, so that the anti-return direction of the toggle pin 85 is changed, and the lower limit block 10 is re-inserted into the inner cavity of the positioning groove 11 driven by the toggle pin 85 to limit the toggle pin 85. Step 2: The user then unlocks the quick lock 14 and steps on the pedal 88 located in the movement direction of the sliding seat 2. The pedal 88 drives the rotating sleeve 7 to rotate. During the rotation of the rotating sleeve 7, the fixed frame 84 and the limit block 10 are used to drive the toggle pin 85 to rotate. During the rotation, the toggle pin 85 toggles the toothed disc 87, causing the toothed disc 87 to rotate in the inner cavity of the rotating sleeve 7, thereby causing the driving rod 81 to drive the two gears 82 on its surface to rotate. During the rotation, the gear 82 drives the rack 83 meshing with it to slide. At this time, the sliding seat 2 slides under the drive of the rack 83, and the gear 82 is engaged with the rack 83. The outer mold 3 is moved on the top of the casting base 1, so that the outer mold 3 is away from the surface of the inner mold 4. According to this operation mode, the two outer molds 3 are moved so that both of the outer molds 3 are away from the surface of the inner mold 4. During the single stepping of the pedal 88, the tension spring 89 is stretched. After the pedal 88 is released, the pedal 88 is reset under the tension of the tension spring 89, waiting for the second stepping. At the same time, the rotating sleeve 7 rotates and drives the toggle pin 85 to move. Under the action of the inclined surface of the end of the toggle pin 85 close to the toothed disc 87, the toggle pin 85 is retracted and quickly reaches the original position. This reset process is promoted by the elastic force of the spring 86. Step three, the user then rotates the operating rod 57, and the operating rod 57 drives the worm 56 to rotate in the inner cavity of the casting base 1 during the rotation process. The worm 56 drives the worm wheel 55 meshing with it to rotate during the rotation process. The worm wheel 55 drives the rotating column 51 to rotate in the inner cavity of the inner mold 4 during the rotation process. The rotating column 51 simultaneously pulls the second pull rod 54 and the first pull rod 53 during the rotation process. Under the action of the reserved stroke of the reserved slide groove 58, the second pull rod 54 first causes a pulling force on the inner wall of the inner mold 4, so that the front side position of the inner mold 4 is displaced first and misaligned with the rear side of the inner mold 4. At this time, the split opening 52 is in a staggered state. Then the first pull rod 53 generates a pulling force on the inner mold 4, so that the staggered angle at the split opening 52 becomes larger, and the overall inner diameter of the inner mold 4 is reduced, so that the surface of the inner mold 4 is separated from the wall of the sewage inspection well, thereby achieving demolding.

[0024] In summary: the flat-opening sliding concrete sewage inspection well demoulding device and method, through the coordinated use of the sliding seat 2, the rotating sleeve 7 and the driving assembly 8, the outer mold 3 is opened and closed in parallel, so that the inner wall of the outer mold 3 is separated from the surface of the sewage inspection well. At the same time, with the coordinated use of the shrinking assembly 5, the inner diameter of the inner mold 4 is shrunk to separate its surface from the inner wall of the sewage inspection well, thereby achieving the purposes of horizontal sliding demoulding, little damage to the product surface, and fast and convenient opening and closing of the mold.

[0025] 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 flat sliding concrete sewage inspection well demoulding device, characterized in that: The device comprises a casting base (1): a slidable sliding seat (2) is provided on both sides of the top of the casting base (1), an outer mold (3) is fixedly connected to the top of the sliding seat (2), an inner mold (4) is provided on the top of the casting base (1), a shrinking component (5) is provided in the inner cavity of the inner mold (4), both ends of the front side of the casting base (1) are fixedly connected to a rotating support (6) by bolts, both ends of the front side of the casting base (1) are provided with a rotating sleeve (7), the inner cavity of the rotating sleeve (7) is provided with a driving component (8), the driving component (8) comprises a driving rod (81) rotatably connected to both sides of the inner cavity of the casting base (1), the front side and the rear side of the surface of the driving rod (81) are fixedly connected to a gear (82), the front side and the rear side of the bottom of the sliding seat (2) are fixedly connected to a rack (83), the gear (8 2) and the rack (83), the top and bottom of the rotating sleeve (7) are fixedly connected to a fixing frame (84), the inner cavity of the driving rod (81) is penetrated by a slidable toggle pin (85), the front end of the driving rod (81) penetrates to the front side of the casting base (1) and extends to the inner cavity of the rotating sleeve (7), the front side of the surface of the driving rod (81) is fixedly connected to a toothed disc (87), the toggle pin (85) and the toothed disc (87) are meshed, the surface of the toggle pin (85) is sleeved with a spring (86), one end of the spring (86) is welded to the toggle pin (85), and the other end of the spring (86) is welded to the fixing frame (84), both sides of the rotating sleeve (7) are fixedly connected to pedals (88), the bottom of the pedal (88) is welded to a tension spring (89), and the bottom end of the tension spring (89) is welded to the casting base (1).

2. The demoulding device of a flat-open sliding concrete sewage inspection well according to claim 1 is characterized in that: The shrinkage assembly (5) comprises a rotating column (51) rotatably connected to the top of the casting base (1); a split opening (52) is provided on the left side of the inner mold (4); two first tie rods (53) and a second tie rod (54) are rotatably connected to the surface of the rotating column (51); the ends of the first tie rod (53) and the second tie rod (54) away from the rotating column (51) are rotatably connected to the inner wall of the inner mold (4).

3. The demoulding device of a horizontally opened sliding concrete sewage inspection well according to claim 2 is characterized in that: The bottom end of the rotating column (51) penetrates the inner cavity of the casting base (1) and is fixedly connected to a worm wheel (55); the front end of the casting base (1) is penetrated by a rotatable worm (56); the rear end of the worm (56) penetrates the inner cavity of the casting base (1) and meshes with the worm wheel (55).

4. The demoulding device for a flat-open sliding concrete sewage inspection well according to claim 3 is characterized in that: The front end of the worm (56) is fixedly connected to an operating rod (57), and a reserved sliding groove (58) adapted to the rotating column (51) is provided on a side of the top of the first pull rod (53) close to the rotating column (51).

5. The demoulding device for a flat-open sliding concrete sewage inspection well according to claim 4 is characterized in that: The rear end of the rotating sleeve (7) passes through between the two rotating supports (6) on the same side, and the rotating sleeve (7) is rotatably connected to the inner cavities of the two rotating supports (6) on the same side.

6. The demoulding device for a flat-open sliding concrete sewage inspection well according to claim 5 is characterized in that: The top and bottom of the rotating sleeve (7) are both fixedly connected to the limiting tube (9), and the moving pin (85) is slidably connected to the inner cavity of the limiting tube (9).

7. The demoulding device for a flat-open sliding concrete sewage inspection well according to claim 6 is characterized in that: The front side and the rear side of the surface of the push pin (85) are both fixedly connected to the limit block (10), and the front side and the rear side of the limit tube (9) are both provided with positioning grooves (11) adapted to the limit block (10).

8. The demoulding device for a flat-open sliding concrete sewage inspection well according to claim 7 is characterized in that: The front and rear sides of the bottom of the sliding seat (2) are fixedly connected to the limiting guide rail (12), and both ends of the front and rear sides of the top of the casting base (1) are provided with limiting sliding grooves (13) that are compatible with the limiting guide rail (12).

9. The demoulding device of a horizontally opened sliding concrete sewage inspection well according to claim 8 is characterized in that: Two quick locks (14) are installed on the front and rear sides of the two outer molds (3).

10. A method for demoulding a flat-opening and sliding concrete sewage inspection well, which is applied to the demoulding device for a flat-opening and sliding concrete sewage inspection well according to claim 9, characterized in that: The method steps are as follows: Step 1: When demoulding, the user first pulls the toggle pin (85) to compress the spring (86) and disengage the toggle pin (85) from the toothed disc (87). The toggle pin (85) is then rotated 180 degrees and the toggle pin (85) is released. Under the action of the rebound force of the spring (86), the toggle pin (85) is reset again, so that the anti-return direction of the toggle pin (85) is changed. Driven by the toggle pin (85), the limit block (10) is re-inserted into the inner cavity of the positioning groove (11) to limit the toggle pin (85). Step 2: The user then unlocks the quick lock (14) and steps on the pedal (88) located in the movement direction of the sliding seat (2). The pedal (88) drives the rotating sleeve (7) to rotate. During the rotation of the rotating sleeve (7), the fixed frame (84) and the limit block (10) are used to drive the toggle pin (85) to rotate. During the rotation, the toggle pin (85) toggle the toothed disc (87), so that the toothed disc (87) rotates in the inner cavity of the rotating sleeve (7), thereby causing the driving rod (81) to drive the two gears (82) on its surface to rotate. During the rotation, the gear (82) drives the rack (83) meshing with it to slide. At this time, the sliding seat (2) slides under the drive of the rack (83). Then, the outer mold (3) moves on the top of the casting base (1), so that the outer mold (3) is away from the surface of the inner mold (4). According to this operation mode, the two outer molds (3) are moved, so that the two outer molds (3) are away from the surface of the inner mold (4). During the process of stepping on the pedal (88) once, the tension spring (89) is stretched. After the pedal (88) is released, the pedal (88) is reset under the tension of the tension spring (89), waiting for the second step. At the same time, the rotating sleeve (7) rotates and drives the toggle pin (85) to move. Under the action of the inclined surface of the end of the toggle pin (85) close to the toothed disc (87), the toggle pin (85) is stretched and quickly returns to the original position. This reset process is promoted by the elastic force of the spring (86); Step 3: The user then rotates the operating rod (57). The operating rod (57) drives the worm (56) to rotate in the inner cavity of the casting base (1). The worm (56) drives the worm wheel (55) meshing with it to rotate. The worm wheel (55) drives the rotating column (51) to rotate in the inner cavity of the inner mold (4). The rotating column (51) simultaneously pulls the second pull rod (54) and the first pull rod (53) during the rotation process. (58) The role of the reserved stroke is that the second pull rod (54) first exerts a pulling force on the inner wall of the inner mold (4), causing the front side of the inner mold (4) to be displaced first and misaligned with the rear side of the inner mold (4). At this time, the split opening (52) is in a staggered state. Subsequently, the first pull rod (53) exerts a pulling force on the inner mold (4), causing the staggered angle at the split opening (52) to increase, thereby reducing the overall inner diameter of the inner mold (4), thereby causing the surface of the inner mold (4) to separate from the wall of the sewage inspection well, thereby achieving demoulding.

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