Forming device for precast concrete inspection well

Abstract

The forming device for the precast concrete inspection well comprises a base, a vertically-arranged inner cylinder is fixedly installed at the top of the base, a mounting cavity is formed in the inner cylinder, a packaging base is installed at the position, at the bottom of the mounting cavity, of the base, a knocking mechanism is installed at the top of the packaging base, and the knocking mechanism is arranged in the mounting cavity. A prefabricated shell is installed on the outer side of the inner cylinder of the base and comprises a first outer cylinder and a second outer cylinder which are of a semicircular structure, forming columns are arranged on the lower sides of the interiors of the first outer cylinder and the second outer cylinder, a plurality of supporting columns are installed between the inner cylinder and the outer cylinders of the base, and an annular tray is installed at the tops of the supporting columns. A forming cavity is formed among the inner cylinder, the first outer cylinder, the second outer cylinder, the forming column and the annular tray, the base is provided with a supporting frame on the outer side of the first outer cylinder and the outer side of the second outer cylinder, driving mechanisms are installed between the base and the supporting frame, and the power output ends of the driving mechanisms on the two sides are connected with the first outer cylinder and the second outer cylinder correspondingly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of inspection well forming, and particularly relates to a forming device for prefabricated concrete inspection wells. BACKGROUND

[0002] The inspection well is set for the convenience of maintenance of power supply, water supply, drainage, sewage, communication, cable television, gas pipe, street lamp line and the like of urban underground infrastructure, and is generally set at a pipe intersection, a turning place, a pipe diameter or slope change place and every certain distance on a straight pipe section, is convenient for periodical inspection of an auxiliary structure, and in the field of municipal engineering construction, the prefabricated concrete inspection well is widely applied due to high construction efficiency and stable quality and the like advantages.

[0003] The inspection well is made of concrete, mortar, bricks, gravel and the like materials mixed according to corresponding proportions, and a batch of concrete inspection wells can be made through use of the forming device, however, the existing forming device cannot realize flexible splitting because the concrete is tightly adhered to the inner wall of the mold after solidification, the staff often needs to forcibly pry with external force, not only the formed inspection well is prone to damage such as corner missing and crack, affecting product quality, but also the labor intensity of the staff is increased and the production efficiency is reduced, therefore, a forming device for prefabricated concrete inspection well is urgently needed to solve the above problems. SUMMARY

[0004] In view of the problems in the above background art, the purpose of the present application is to provide a forming device for prefabricated concrete inspection well.

[0005] To achieve the above technical purpose, the technical scheme adopted by the present application is as follows: A forming device for prefabricated concrete inspection well, comprising a base, a vertically arranged inner cylinder is fixedly installed on the top of the base, an installation cavity is arranged in the inner cylinder, an encapsulation seat is installed at the bottom of the installation cavity, a knocking mechanism is installed on the top of the encapsulation seat, the knocking mechanism is arranged in the installation cavity, a prefabricated outer shell is installed on the outer side of the inner cylinder, the prefabricated outer shell comprises a first outer cylinder and a second outer cylinder arranged in a semicircular structure, a forming column is arranged at the inner bottom of the first outer cylinder and the second outer cylinder, a plurality of support columns are installed between the inner cylinder and the outer cylinder of the base, an annular tray is installed on the top of the support column, a forming cavity is formed between the inner cylinder, the first outer cylinder, the second outer cylinder, the forming column and the annular tray, a support frame is installed on the outer side of the first outer cylinder and the second outer cylinder of the base, a driving mechanism is installed between the base and the support frame, and the power output ends of the driving mechanisms on both sides are connected with the first outer cylinder and the second outer cylinder respectively.

[0006] Further limited, the knocking mechanism comprises a motor seat mounted on the packaging seat, the bottom of the motor seat is provided with a rotating motor, the power output end of the rotating motor is connected with a rotating rod, the upper and lower sides of the rotating rod are provided with bearings, the upper bearing is mounted on the top of the installation cavity, the lower bearing is mounted on the motor seat, a plurality of mounting sleeves are uniformly mounted on the rotating rod, eccentric cams are mounted on the outer side of the mounting sleeves, an assembly frame is mounted on the top of the motor seat, a plurality of slide rods are slidably mounted on the assembly frame, knocking balls are mounted on the outer side of the slide rods, push blocks are mounted on the inner side of the slide rods, springs are mounted on one side of the push blocks, the free end of the spring is mounted on the assembly frame, the other side of the push block is in contact with the eccentric cam. Such a structure design can play a knocking role and can quickly demold.

[0007] Further limited, the center of the packaging seat is provided with an air pipe interface connected with an external cold air machine, the outer side of the motor seat is provided with a plurality of ventilation holes in communication with the installation cavity. Such a structure design can cool and heat the interior and can assist in accelerating the solidification and molding of the concrete.

[0008] Further limited, the first outer cylinder and the second outer cylinder are both provided with cooling cavities, the top side of the cooling cavities is provided with a liquid inlet pipe, and the bottom side of the cooling cavities is provided with a liquid outlet pipe. Such a structure design accelerates the solidification and molding of the concrete.

[0009] Further limited, the first outer cylinder is provided with two groups of sealing grooves at the connection with the second outer cylinder, the second outer cylinder is provided with sealing rubber strips at the corresponding sealing grooves, and the sealing rubber strips are mounted in the sealing grooves. Such a structure design enables the first outer cylinder and the second outer cylinder to be sealingly connected to prevent leakage.

[0010] Further limited, the outer side of the first outer cylinder and the second outer cylinder is provided with a plurality of first reinforcing ribs, the first reinforcing ribs are uniformly arranged on the first outer cylinder and the second outer cylinder along the axial direction, the outer side of the first outer cylinder and the second outer cylinder is provided with a plurality of second reinforcing ribs, the second reinforcing ribs are uniformly arranged on the first outer cylinder and the second outer cylinder along the center of the outer cylinder, two abutting second reinforcing ribs are provided with a plurality of connecting holes, bolts are mounted in the connecting holes, and nuts are mounted on the other side of the bolts. Such a structure design further improves the effect of tightly connecting the first outer cylinder and the second outer cylinder.

[0011] Further limited, the forming column is provided with a cavity in communication with the cooling cavity. Such a structure design enables the forming column to also achieve the effect of cooling and accelerating the solidification and molding of the concrete.

[0012] Further limited, the support column is provided with a jacking cylinder, a demolding top block is connected to the power output end of the jacking cylinder, the top of the annular tray is provided with a placing groove matched with the demolding top block, and the demolding top block is placed in the placing groove. The structure design plays the effect of jacking and demolding.

[0013] Further limited, the driving mechanism comprises a driving motor installed on the base, a rotating shaft is connected to the power output end of the driving motor, a first gear is connected to the rotating shaft, a first rack is meshingly connected to the first gear, a first lock block is connected to the other side of the first rack, a first transmission wheel is installed on one side of the first gear and connected to the rotating shaft, a transmission belt is connected to the first transmission wheel, a second transmission wheel is connected to the other side of the transmission belt, a driven rod is connected to the second transmission wheel, bearing seats are installed on both sides of the driven rod and fixedly installed at the bottom of the support frame, a second gear is connected to the driven rod, a second rack is meshingly connected to the second gear, and the second rack is slidably arranged at the bottom of the support frame; the other side of the second rack is connected to a second lock block, and the first lock block and the second lock block are locked and installed on the outer cylinder. The structure design ensures that the first outer cylinder and the second outer cylinder can move smoothly.

[0014] Further limited, the first rack and the second rack are provided with guide sliding blocks, the base and the support frame are provided with guide sliding grooves at positions corresponding to the guide sliding blocks, and the guide sliding blocks are slidably arranged in the guide sliding grooves. The structure design further improves the effect of smooth movement of the first outer cylinder and the second outer cylinder.

[0015] The beneficial effects of the present application are: 1. The inner cylinder is sequentially knocked by the knocking mechanism, so that the formed inspection well is flexibly separated from the inner cylinder, the problems of missing corners and cracks caused by traditional forced prying are avoided, the first outer cylinder and the second outer cylinder are sealingly connected through the sealing groove and the sealing rubber strip, concrete leakage is prevented, the integrity of the formed inspection well is further ensured, and the product qualification rate is improved. 2. The first outer cylinder and the second outer cylinder can be driven to open and close synchronously by the driving mechanism, manual manual disassembly of the mold is not required, the demolding top block is pushed by the jacking cylinder, the formed inspection well can be jacked up from the annular tray, and the formed inspection well can be quickly taken out, so that the manual operation steps are greatly reduced, the physical consumption of workers is reduced, the single-batch production cycle is shortened, and the overall production efficiency is improved. 3. The installation cavity of the inner cylinder can be connected to a cold air machine through an air pipe interface, heat exchange is realized by reducing the temperature of the inner cylinder through cold air, the cooling cavity of the outer cylinder and the cavity in the forming column can be connected to cooling medium, the heat exchange area is expanded, double cooling is realized, the solidification speed of concrete is accelerated, the waiting time is reduced, and the production rhythm is improved. 4. By setting a first reinforcing rib (axial) and a second reinforcing rib (circumferential) on the outer sides of the first outer cylinder and the second outer cylinder, the present invention can effectively improve the structural strength of the outer cylinder, avoid deformation after long-term use, and the outer cylinder can be fixed by bolts and nuts of the second reinforcing rib after assembly, ensuring the sealing and stability of the molding cavity during concrete filling and vibration. Attached Figure Description

[0016] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings; Figure 1 This is a schematic diagram of the axial structure of a molding device for precast concrete inspection wells according to an embodiment of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of a molding device for precast concrete inspection wells according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the horizontal cross-sectional structure of the inner cylinder of a molding device for precast concrete inspection wells according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the bottom structure of a support frame for a molding device used in precast concrete inspection wells according to an embodiment of the present invention; The symbols for the main components are explained below: 1. Base; 2. Inner cylinder; 3. Mounting cavity; 4. Encapsulation seat; 5. Striking mechanism; 6. Prefabricated outer shell; 7. First outer cylinder; 8. Second outer cylinder; 9. Molding column; 10. Support column; 11. Annular tray; 12. Molding cavity; 13. Support frame; 14. Drive mechanism; 15. Motor base; 16. Rotary motor; 17. Rotating rod; 18. Bearing; 19. Mounting sleeve; 20. Eccentric cam; 21. Assembly frame; 22. Slide rod; 23. Striking ball; 24. Push block; 25. Spring; 26. Air duct interface; 27. Ventilation hole; 28. Cooling cavity; 29. ​​Infusion pipe; 30. Drain pipe. 31. Sealing groove, 32. Sealing strip, 33. First reinforcing rib, 34. Second reinforcing rib, 35. Connecting hole, 36. Bolt, 37. Nut, 38. Cavity, 39. Lifting cylinder, 40. Demolding block, 41. Placement groove, 42. Drive motor, 43. Rotating shaft, 44. First gear, 45. First rack, 46. First locking block, 47. First transmission wheel, 48. Transmission belt, 49. Second transmission wheel, 50. Driven rod, 51. Bearing seat, 52. Second gear, 53. Second rack, 54. Second locking block, 55. Guide slider, 56. Guide groove. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] Example 1, such as Figure 1 , Figure 2 and Figure 3As shown, a forming device for precast concrete inspection well, the base 1 top fixedly installed with a vertical setting inner cylinder 2, the inner cylinder 2 is provided with an installation cavity 3, the base 1 is provided with an encapsulation seat 4 at the bottom of the installation cavity 3, the encapsulation seat 4 top is provided with a knocking mechanism 5, the knocking mechanism 5 is arranged in the installation cavity 3, the base 1 is provided with a precast outer shell 6 outside the inner cylinder 2, the precast outer shell 6 includes a first outer cylinder 7 and a second outer cylinder 8 arranged in a semicircular structure, the inside lower side of the first outer cylinder 7 and the second outer cylinder 8 is provided with a forming column 9, the base 1 is provided with a plurality of support columns 10 between the inner cylinder 2 and the outer cylinder, the support column 10 top is provided with an annular tray 11, the inner cylinder 2, the first outer cylinder 7, the second outer cylinder 8, the forming column 9 and the annular tray 11 form a forming cavity 12, the base 1 is provided with a support frame 13 outside the first outer cylinder 7 and the second outer cylinder 8, the base 1 and the support frame 13 are provided with a drive mechanism 14, the power output end of the two side drive mechanisms 14 is connected with the first outer cylinder 7 and the second outer cylinder 8 respectively.

[0019] In use, the two side drive mechanisms 14 are started by control, the first outer cylinder 7 and the second outer cylinder 8 are pushed by the two side drive mechanisms 14, and the forming column 9 is moved to the inner cylinder 2 at the same time, until the first outer cylinder 7 and the second outer cylinder 8 are fitted to form the precast outer shell 6, and the forming cavity 12 is formed by combining the inner cylinder 2 and the annular tray 11, then the forming cavity 12 is filled with concrete and vibrated, after the concrete in the forming cavity 12 cools and solidifies, the precast concrete inspection well is formed, then the first outer cylinder 7 and the second outer cylinder 8 are moved to the two sides by the two side drive mechanisms 14 again, and the knocking mechanism 5 is started at the same time, the inner cylinder 2 is knocked by the knocking mechanism 5, which facilitates the separation of the precast concrete inspection well and the inner cylinder 2, and facilitates the subsequent removal of the precast concrete inspection well from the inner cylinder 2.

[0020] As shown in Embodiment 5, Figure 3 The knocking mechanism 5 includes a motor seat 15 mounted on the encapsulation seat 4, a rotary motor 16 mounted at the bottom of the motor seat 15, a rotary rod 17 connected with the power output end of the rotary motor 16, bearings 18 mounted on the upper and lower sides of the rotary rod 17, the upper side bearing 18 mounted at the top of the installation cavity 3, the lower side bearing 18 mounted on the motor seat 15, a plurality of mounting sleeves 19 uniformly mounted on the rotary rod 17, eccentric cams 20 mounted on the outer side of the mounting sleeves 19, an assembly frame 21 mounted at the top of the motor seat 15, a plurality of slide rods 22 slidingly mounted on the assembly frame 21, knocking balls 23 mounted on the outer side of the slide rods 22, push blocks 24 mounted on the inner side of the slide rods 22, springs 25 mounted on one side of the push blocks 24, the free ends of the springs 25 mounted on the assembly frame 21, and the other side of the push blocks 24 abutting the eccentric cams 20.

[0021] In this embodiment, during use, the rotary motor 16 is started, which drives the rotary rod 17 to rotate along the bearing 18. When the rotary rod 17 rotates, it synchronously drives several mounting sleeves 19 to move. The mounting sleeves 19 then drive the eccentric cam 20 to rotate. When the eccentric cam 20 rotates, it will push several push blocks 24 in an orderly manner, causing the push blocks 24 to push the slide rod 22 to slide on the assembly frame 21, and at the same time squeeze the spring 25. This causes the slide rod 22 to push the striking ball 23 to strike the mounting cavity 3, and transmit the force generated by the striking to the inner cylinder 2 and the precast concrete inspection well. This causes the precast concrete inspection well to separate from the inner cylinder 2, becoming loose, which facilitates the demolding of the precast concrete inspection well after molding and improves the quality of the precast concrete inspection well after demolding.

[0022] Example 5, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the center of the encapsulation base 4 is provided with a duct interface 26, which is connected to an external air cooler; the outer side of the motor base 15 is provided with several ventilation holes 27, and the other side of the ventilation holes 27 is connected to the mounting cavity 3.

[0023] In this embodiment, during the cooling process, it can also be connected to an external air cooler through the air duct interface 26. The external air cooler outputs cold air into the motor base 15 and enters the mounting cavity 3 through the ventilation hole 27, so that a lower temperature space is formed inside the inner cylinder 2. The low temperature can be transferred to the inner cylinder 2 for heat exchange, thereby accelerating the solidification and molding of the concrete.

[0024] Example 5, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: both the first outer cylinder 7 and the second outer cylinder 8 are provided with cooling chambers 28, a liquid infusion pipe 29 is installed on the top side of the cooling chamber 28, and a liquid drain pipe 30 is installed on the bottom side of the cooling chamber 28.

[0025] In this embodiment, during use, a cooling medium is supplied to the cooling chamber 28 inside the first outer cylinder 7 and the second outer cylinder 8 through the infusion pipe 29, so as to exchange heat with the first outer cylinder 7 and the second outer cylinder 8, thereby accelerating the solidification speed in the molding cavity 12. The cooling medium after heat exchange is output from the drain pipe 30.

[0026] Example 5, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: the first outer cylinder 7 is provided with two sets of sealing grooves 31 at the connection with the second outer cylinder 8, and the second outer cylinder 8 is provided with sealing strips 32 at the corresponding sealing grooves 31. The sealing strips 32 are installed in the sealing grooves 31.

[0027] In this embodiment, when the first outer cylinder 7 is connected to the second outer cylinder 8, the sealing strip 32 on the second outer cylinder 8 is inserted into the sealing groove 31 inside the first outer cylinder 7, so that the first outer cylinder 7 and the second outer cylinder 8 can be sealed together to prevent leakage.

[0028] Example 5, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: a plurality of first reinforcing ribs 33 are installed on the outer sides of both the first outer cylinder 7 and the second outer cylinder 8. The plurality of first reinforcing ribs 33 are evenly arranged on the first outer cylinder 7 and the second outer cylinder 8 along the axial direction. A plurality of second reinforcing ribs 34 are installed on the outer sides of both the first outer cylinder 7 and the second outer cylinder 8. The second reinforcing ribs 34 are evenly arranged on the first outer cylinder 7 and the second outer cylinder 8 along the center of the outer cylinder. Two adjacent second reinforcing ribs 34 are provided with a plurality of connecting holes 35. Bolts 36 are installed in the connecting holes 35. Nuts 37 are installed on the other side of the bolts 36.

[0029] In this embodiment, by setting the first reinforcing rib 33 and the second reinforcing rib 34, the structural strength of the first outer cylinder 7 and the second outer cylinder 8 can be enhanced. Furthermore, by setting the connecting hole 35 on the second reinforcing rib 34, when the first outer cylinder 7 and the second outer cylinder 8 are combined, the second reinforcing rib 34 on the first outer cylinder 7 and the second outer cylinder 8 are fitted together, and the bolt 36 is inserted into the connecting hole 35 and the nut 37 is locked for fixation, further improving the effect of tight connection between the first outer cylinder 7 and the second outer cylinder 8.

[0030] Example 5, as Figure 3 As shown, this embodiment adds the following structure to the embodiment 1: the forming column 9 is provided with a cavity 38 that communicates with the cooling cavity 28.

[0031] In this embodiment, during use, when the cooling medium is delivered to the cooling chamber 28 inside the first outer cylinder 7 and the second outer cylinder 8 through the infusion pipe 29, the cooling medium will also flow into the cavity 38 inside the molding column 9, further increasing the heat exchange area and accelerating the solidification speed inside the molding chamber 12.

[0032] Example 5, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: a lifting cylinder 39 is installed inside the support column 10, and a demolding block 40 is connected to the power output end of the lifting cylinder 39. The top of the annular tray 11 is provided with a placement groove 41 that matches the demolding block 40, and the demolding block 40 is placed in the placement groove 41.

[0033] In this embodiment, after the precast concrete inspection well is struck by the striking mechanism 5, the inner cylinders 2 of the precast concrete inspection well separate and become loose. When the first outer cylinder 7 and the second outer cylinder 8 move away from the inner cylinder 2, the lifting cylinder 39 is activated and pushes the demolding block 40, so that the demolding block 40 pushes the precast concrete inspection well up from the annular tray 11, which facilitates the subsequent demolding work by the operators and makes it easy to take out the precast concrete inspection well.

[0034] Example 5, as Figure 3 As shown, this embodiment adds the following structure to the embodiment 1: the drive mechanism 14 includes a drive motor 42 mounted on the base 1, the power output end of the drive motor 42 is connected to a rotating shaft 43, the rotating shaft 43 is connected to a first gear 44, the first gear 44 is meshed with a first rack 45, the other side of the first rack 45 is connected to a first locking block 46, the rotating shaft 43 is mounted on one side of the first gear 44 with a first transmission wheel 47, the first transmission wheel 47 is connected to a transmission belt 48, the other side of the transmission belt 48 is connected to a second transmission wheel 49, the second transmission wheel 49 is connected to a driven rod 50, bearing seats 51 are mounted on both sides of the driven rod 50, the bearing seats 51 are fixedly mounted on the bottom of the support frame 13, the driven rod 50 is connected to a second gear 52, the second gear 52 is meshed with a second rack 53, the second rack 53 is slidably disposed on the bottom of the support frame 13, the other side of the second rack 53 is connected to a second locking block 54, and both the first locking block 46 and the second locking block 54 are locked and mounted on the outer cylinder.

[0035] In this embodiment, during use, the drive motor 42 is started, which drives the rotating shaft 43 to rotate. The rotating shaft 43 drives the first gear 44 and the first transmission wheel 47 to rotate synchronously. The first transmission wheel 47 drives the transmission belt 48, which drives the second transmission wheel 49. The second transmission wheel 49 drives the driven rod 50 to rotate within the bearing seat 51. The driven rod 50 drives the second gear 52 to rotate, thereby causing the first gear 44 and the second gear 52 to rotate synchronously. This synchronously drives the meshing first rack 45 and the second rack 53 to move. The first rack 45 and the second rack 53, through the first locking block 46 and the second locking block 54, drive the first outer cylinder 7 and the second outer cylinder 8 to move synchronously inward and outward.

[0036] Example 5, as Figure 3 As shown, this embodiment adds the following structure based on embodiment 1: both the first rack 45 and the second rack 53 are equipped with guide sliders 55, and the base 1 and the support frame 13 are provided with guide grooves 56 at the corresponding guide sliders 55, and the guide sliders 55 are slidably disposed in the guide grooves 56.

[0037] In this embodiment, when the first rack 45 and the second rack 53 move, the first rack 45 and the second rack 53 will drive the guide slider 55 to slide in the guide groove 56 on the base 1 and the support frame 13, ensuring the smoothness of the movement, so that the first outer cylinder 7 and the second outer cylinder 8 can achieve a tight fit.

[0038] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A forming device for precast concrete inspection chambers, comprising a base (1), characterised in that: The base (1) top fixed mounting is vertically arranged inner cylinder (2), the inner cylinder (2) is equipped with installation cavity (3), the base (1) is installed in the bottom of installation cavity (3) and is equipped with encapsulation seat (4), the encapsulation seat (4) top is installed and is struck mechanism (5), the striking mechanism (5) is arranged in installation cavity (3), the base (1) is installed in the outside of inner cylinder (2) and is equipped with prefabricated shell (6), the prefabricated shell (6) includes the first outer cylinder (7) and second outer cylinder (8) of semicircular structure arrangement, the inside lower side of first outer cylinder (7) and second outer cylinder (8) is equipped with shaped column (9), the base (1) is installed between inner cylinder (2) and outer cylinder and is equipped with a plurality of support column (10), the support column (10) top is installed and is circular tray (11), the inner cylinder (2), first outer cylinder (7), second outer cylinder (8), shaped column (9) and circular tray (11) between form shaping cavity (12), the base (1) is installed in the outside of first outer cylinder (7) and second outer cylinder (8) and is equipped with support frame (13), the base (1) and support frame (13) between installation drive mechanism (14), both sides drive mechanism (14) power output end is connected with first outer cylinder (7) and second outer cylinder (8) respectively.

2. A forming device for precast concrete inspection chambers according to claim 1, characterised in that: The striking mechanism (5) includes motor seat (15) installed on the encapsulation seat (4), the bottom of motor seat (15) is installed with rotary motor (16), the power output end of rotary motor (16) is connected with rotary rod (17), the upper and lower sides of rotary rod (17) are installed with bearing (18), the upper bearing (18) is installed on the top of installation cavity (3), the lower bearing (18) is installed on motor seat (15), a plurality of installation sleeves (19) are uniformly installed on rotary rod (17), eccentric cam (20) is installed on the outside of installation sleeve (19), assembly frame (21) is installed on the top of motor seat (15), a plurality of slide rods (22) are slidably installed on assembly frame (21), knock ball (23) is installed on the outside of slide rod (22), push block (24) is installed on the inside of slide rod (22), spring (25) is installed on one side of push block (24), the free end of spring (25) is installed on assembly frame (21), the other side of push block (24) is attached to eccentric cam (20).

3. A forming device for precast concrete inspection chambers according to claim 2, characterised in that: The center of encapsulation seat (4) is provided with a wind pipe interface (26), which is connected with an external cold air machine, and a plurality of ventilation holes (27) are provided on the outside of motor seat (15), and the other side of ventilation hole (27) is communicated with installation cavity (3).

4. A forming device for precast concrete inspection chambers according to claim 3, characterised in that: The first outer cylinder (7) and the second outer cylinder (8) are both provided with a cooling cavity (28), and the top side of the cooling cavity (28) is provided with a liquid inlet pipe (29), and the bottom side of the cooling cavity (28) is provided with a liquid outlet pipe (30).

5. A forming apparatus for precast concrete inspection chambers as claimed in claim 4 wherein: The first outer cylinder (7) is provided with two groups of sealing grooves (31) at the connection with the second outer cylinder (8), and the second outer cylinder (8) is provided with sealing rubber strips (32) at the corresponding sealing grooves (31), which are installed in the sealing grooves (31).

6. A forming apparatus for precast concrete inspection chambers as claimed in claim 5 wherein: A plurality of first reinforcing ribs (33) are installed on the outer sides of the first outer cylinder (7) and the second outer cylinder (8), and are uniformly arranged on the first outer cylinder (7) and the second outer cylinder (8) in the axial direction. A plurality of second reinforcing ribs (34) are installed on the outer sides of the first outer cylinder (7) and the second outer cylinder (8), and are uniformly arranged on the first outer cylinder (7) and the second outer cylinder (8) along the center of the outer cylinder. Two abutting second reinforcing ribs (34) are provided with a plurality of connecting holes (35), and bolts (36) are installed in the connecting holes (35). The other side of the bolt (36) is provided with a nut (37).

7. A forming apparatus for precast concrete inspection chambers as claimed in claim 6 wherein: The forming column (9) is provided with a cavity (38) communicating with the cooling cavity (28).

8. A forming device for precast concrete inspection chambers according to claim 7, characterised in that: The support column (10) is provided with a jacking cylinder (39), and the power output end of the jacking cylinder (39) is connected with a demolding top block (40). The top of the annular tray (11) is provided with a placing groove (41) matched with the demolding top block (40), and the demolding top block (40) is placed in the placing groove (41).

9. A forming apparatus for precast concrete inspection chambers as claimed in claim 8 wherein: The driving mechanism (14) comprises a driving motor (42) installed on the base (1). The power output end of the driving motor (42) is connected with a rotating shaft (43). The rotating shaft (43) is connected with a first gear (44). The first gear (44) is connected with a first rack (45) in meshing mode. The other side of the first rack (45) is connected with a first lock block (46). The first driving wheel (47) is installed on one side of the first gear (44). The first driving wheel (47) is connected with a transmission belt (48). The other side of the transmission belt (48) is connected with a second driving wheel (49). The second driving wheel (49) is connected with a driven rod (50). The bearing seat (51) is installed on both sides of the driven rod (50). The bearing seat (51) is fixedly installed on the bottom of the support frame (13). The second gear (52) is connected with the driven rod (50). The second gear (52) is connected with a second rack (53) in meshing mode. The second rack (53) is slidingly arranged on the bottom of the support frame (13). The other side of the second rack (53) is connected with a second lock block (54). The first lock block (46) and the second lock block (54) are both lockingly installed on the outer cylinder.

10. A forming apparatus for precast concrete inspection shafts according to claim 9, characterised in that: The first rack (45) and the second rack (53) are both provided with a guide sliding block (55). The base (1) and the support frame (13) are provided with a guide sliding groove (56) at the position corresponding to the guide sliding block (55). The guide sliding block (55) is slidingly arranged in the guide sliding groove (56).

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