Steel mould device for prefabricating inspection well and construction method

Abstract

The invention discloses a steel mould device for prefabricating an inspection well and a construction method, and relates to the technical field of well prefabricating steel mould construction. The side end of the first outer mold steel plate is connected with a second outer mold steel plate. A first inner mold steel plate is arranged on the inner side of the first outer mold steel plate. The side end of the first inner mold steel plate on the inner side of the first outer mold steel plate is connected with a second inner mold steel plate. A well prefabricated groove is formed between the first outer mold steel plate and the first inner mold steel plate. The first outer mold steel plate, the second outer mold steel plate, the first inner mold steel plate and the second inner mold steel plate are made of high-quality steel, have extremely high strength and hardness and can bear large pressure and impact force, the stability and safety of a well body structure are guaranteed, a well body manufactured through the steel mold has the longer service life, and the service life of the well body is prolonged. The steel die can bear erosion and load of the underground environment for a long time, the frequency of maintenance and replacement is reduced, and the steel die and a well body made of the steel die are generally subjected to anti-corrosion treatment such as hot dip galvanizing.

Description

Technical Field

[0001] The invention relates to the technical field of well prefabrication steel formwork construction, and in particular to a steel formwork device and a construction method for prefabrication of inspection wells. Background Art

[0002] Well prefabricated steel mold is a high-hardness, high-density steel mold. It is customized according to design requirements and is used to prefabricate the cement well body in the prefabrication yard and then transport it to the construction site for installation. According to the usage and structural characteristics, well prefabricated steel molds can be divided into two types: cast-in-place type and prefabricated type.

[0003] In view of the actual needs of the municipal rainwater and sewage pipe network project, and the diversity of the depth and diameter specifications of the inspection wells in the project, there are many inconveniences in the installation and disassembly process of traditional formwork during on-site casting construction, resulting in low work efficiency and great challenges in quality control, which makes it difficult to meet the actual production needs of the project site.

[0004] In the existing technical solutions, wooden formwork is traditionally widely used. Although wooden prefabricated boards are light and easy to process, their strength and durability are relatively low. They cannot withstand greater pressure and impact, and are easily affected by moisture, deformation and corrosion. Wooden prefabricated boards are easily corroded and damaged in underground environments and require frequent replacement and maintenance, which increases the cost of use. Wooden prefabricated boards may require more manual operations and time during the production and installation process, and the construction efficiency is relatively low. Here we provide a steel formwork device and a construction method for prefabrication of inspection wells. Summary of the invention

[0005] The purpose of the present invention is to provide a steel mold device and a construction method for prefabrication of inspection wells, so as to solve the problems of wooden formworks traditionally commonly used in the prior art. Although wooden prefabricated boards are light and easy to process, their strength and durability are relatively low, and they cannot withstand large pressure and impact force. They are easily affected by moisture, deformed and corroded. Wooden prefabricated boards are easily corroded and damaged in underground environments, and require frequent replacement and maintenance, which increases the cost of use. Wooden prefabricated boards may require more manual operations and time during the production and installation process, and the construction efficiency is relatively low.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solutions:

[0007] A steel formwork device and construction method for prefabrication of inspection wells, comprising a No. 1 outer formwork steel plate; a No. 2 outer formwork steel plate is connected to the side end of the No. 1 outer formwork steel plate; an No. 1 inner formwork steel plate is provided on the inner side of the No. 1 outer formwork steel plate; a No. 2 inner formwork steel plate is connected to the side end of the No. 1 inner formwork steel plate inside the No. 1 outer formwork steel plate; a well prefabrication groove is provided between the No. 1 outer formwork steel plate and the No. 1 inner formwork steel plate; a No. 1 sling is fixedly connected to the outer side walls of the No. 1 outer formwork steel plate and the No. 2 outer formwork steel plate; a No. 2 sling is fixedly connected to the outer side walls of the No. 1 inner formwork steel plate and the No. 2 inner formwork steel plate; a connecting unit is provided on one side of the No. 1 outer formwork steel plate.

[0008] As a further solution of the present invention: the connecting unit includes a rotating connecting plate; the rotating connecting plate is rotatably connected to the outer side wall of the No. 1 outer mold steel plate; the outer side wall of the No. 2 outer mold steel plate is fixedly connected with a positioning block; the interior of the rotating connecting plate is rotatably connected with a positioning bolt, and the positioning bolt is threadedly connected to the positioning block.

[0009] As a further solution of the present invention: positioning holes are opened inside the No. 1 inner mold steel plate and the No. 2 inner mold steel plate; a connecting positioning rod is provided at one end of the No. 1 inner mold steel plate; two groups of positioning rods are fixedly connected to one end of the connecting positioning rod; the two groups of positioning rods correspond to the positioning holes.

[0010] As a further solution of the present invention: a crane hook is provided at the top of the No. 1 outer form steel plate; the bottom end of the crane hook is connected to an operating table; a plurality of groups of steel wires are fixedly connected to the bottom end of the operating table, and the steel wires are arranged above the No. 1 outer form steel plate; a disassembly hook is fixedly connected to the bottom end of the steel wire; the disassembly hook is arranged above the No. 1 sling and the No. 2 sling.

[0011] As a further solution of the present invention: a winding drum is provided on one side of the steel wire; an electromagnet is connected to the bottom end of the winding drum; and the electromagnet is provided on one side of the disassembly hook.

[0012] As a further solution of the present invention: an electric push rod is fixedly connected to the bottom end of the operating table; a motor is fixedly connected to the bottom end of the electric push rod; a disassembly bolt head is fixedly connected to the output end of the motor; the disassembly bolt head is arranged above the No. 1 outer mold steel plate; a magnet is arranged inside the disassembly bolt head, and the disassembly bolt head corresponds to the positioning bolt.

[0013] As a further solution of the present invention: the inner parts of the No. 1 outer mold steel plate and the No. 2 outer mold steel plate are both provided with limiting holes; and the inner parts of the limiting holes are plugged with positioning rods.

[0014] A steel formwork construction method for prefabrication of an inspection well comprises the following steps:

[0015] S1. The main body of the formwork is made of 5mm thick high-strength steel plate, which has been treated with anti-corrosion to ensure that it will not rust in harsh environments for a long time. The surface of the inner formwork is covered with a 3mm thick composite material, which has good demoulding effect and durability. After assembling the No. 1 outer formwork steel plate, No. 2 outer formwork steel plate and No. 1 inner formwork steel plate, No. 2 inner formwork steel plate, they are placed in the predetermined position. The symmetry and stability of the formwork are ensured by adjusting the connecting parts, and the mixed concrete is poured into the well precast trough;

[0016] S2. Use a vibrator to vibrate the concrete to make it dense and free of voids. During the vibration process, attention should be paid to the control of the vibration intensity and time to avoid excessive vibration that may cause damage to the concrete structure.

[0017] S3. The mold can only be removed after the concrete strength reaches the design requirements; after removal of the mold, the prefabricated inspection well needs to be covered and maintained to ensure the strength and stability of the inspection well.

[0018] The beneficial effects of the present invention are as follows: the No. 1 outer mold steel plate, the No. 2 outer mold steel plate, the No. 1 inner mold steel plate and the No. 2 inner mold steel plate steel molds are made of high-quality steel, have extremely high strength and hardness, can withstand greater pressure and impact force, ensure the stability and safety of the well body structure, the well body made of steel molds has a longer service life, can withstand the erosion and load of the underground environment for a long time, and reduce the frequency of maintenance and replacement. The steel molds and the well bodies made of them are usually subjected to anti-corrosion treatments, such as hot-dip galvanizing, etc., which can effectively resist the erosion of moisture, salt and other corrosive substances in the underground environment and extend the service life. The prefabricated steel molds are convenient and quick to install on site, reduce the amount of wet work on site, shorten the construction period, and have the advantages of quick installation, easy disassembly, high reuse rate, low cost and high safety. Compared with traditional templates, the new template of the present invention significantly improves the efficiency and quality of inspection well manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the No. 1 outer mold steel plate in the present invention;

[0022] Figure 3 It is a schematic diagram of the overall structure of the No. 1 inner mold steel plate in the present invention;

[0023] Figure 4 The present invention Figure 1 Enlarged view of point A in the middle.

[0024] Figure 5 This is the process intention of the present invention;

[0025] In the figure: 1. No. 1 outer mold steel plate; 2. No. 2 outer mold steel plate; 3. No. 1 inner mold steel plate; 4. No. 2 inner mold steel plate; 5. No. 1 lifting belt; 6. Rotating connecting plate; 7. Positioning bolt; 8. Positioning block; 9. No. 2 lifting belt; 10. Connecting positioning plug rod; 11. Well prefabricated groove; 12. Crane hook; 13. Operating table; 14. Steel wire; 15. Disassembling hook; 16. Winding drum; 17. Electromagnet; 18. Electric push rod; 19. Motor; 20. Disassembling bolt head; 21. Positioning clamp rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-Figure 5 As shown, a steel formwork device and construction method for prefabrication of inspection wells include a No. 1 outer formwork steel plate 1; the side end of the No. 1 outer formwork steel plate 1 is connected to a No. 2 outer formwork steel plate 2; an No. 1 inner formwork steel plate 3 is provided on the inner side of the No. 1 outer formwork steel plate 1; the side end of the No. 1 inner formwork steel plate 3 on the inner side of the No. 1 outer formwork steel plate 1 is connected to a No. 2 inner formwork steel plate 4; a well prefabrication groove 11 is provided between the No. 1 outer formwork steel plate 1 and the No. 1 inner formwork steel plate 3; the outer side walls of the No. 1 outer formwork steel plate 1 and the No. 2 outer formwork steel plate 2 are fixedly connected to a No. 1 sling 5; the outer side walls of the No. 1 inner formwork steel plate 3 and the No. 2 inner formwork steel plate 4 are fixedly connected to a No. 2 sling 9; a connecting unit is provided on one side of the No. 1 outer formwork steel plate 1.

[0028] When working, connect and assemble the No.1 outer formwork steel plate 1 and the No.2 outer formwork steel plate 2, and then splice and assemble the No.1 inner formwork steel plate 3 and the No.2 inner formwork steel plate 4, so that the No.1 outer formwork steel plate 1, the No.2 outer formwork steel plate 2, the No.1 inner formwork steel plate 3 and the No.2 inner formwork steel plate 4 are assembled to form a well prefabricated groove 11, and concrete is poured into the well prefabricated groove 11. The No.1 outer formwork steel plate 1, the No.2 outer formwork steel plate 2, the No.1 inner formwork steel plate 3 and the No.2 inner formwork steel plate 4 steel molds are made of high-quality steel, which has extremely high strength and hardness, can withstand greater pressure and impact force, and ensure the stability and safety of the well body structure. The well body made of steel molds has a longer service life and can withstand the underground environment for a long time. Erosion and load, reduce the frequency of maintenance and replacement, steel molds and the well bodies made of them are usually treated with anti-corrosion, such as hot-dip galvanizing, etc., which can effectively resist the erosion of moisture, salt and other corrosive substances in the underground environment, and extend the service life. The prefabricated steel molds are convenient and quick to install on site, reducing the amount of wet work on site and shortening the construction period. They have the advantages of quick installation, convenient disassembly, high reuse rate, low cost and high safety. Compared with traditional templates, the new template of the present invention significantly improves the efficiency and quality of inspection well manufacturing. After the work is completed, the No. 1 outer mold steel plate 1, the No. 2 outer mold steel plate 2, the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 are disassembled.

[0029] The connecting unit includes a rotating connecting plate 6; the rotating connecting plate 6 is rotatably connected to the outer side wall of the No. 1 outer mold steel plate 1; the outer side wall of the No. 2 outer mold steel plate 2 is fixedly connected with a positioning block 8; the interior of the rotating connecting plate 6 is rotatably connected with a positioning bolt 7, and the positioning bolt 7 is threadedly connected to the positioning block 8.

[0030] When the side ends of the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2 are fitted together, the rotating connecting plate 6 is rotated onto the positioning block 8, and then the positioning bolt 7 is rotated to penetrate the rotating connecting plate 6 and insert it into the interior of the positioning block 8. The positions of the rotating connecting plate 6 and the positioning block 8 are fixed by the positioning bolt 7, so that the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2 are connected and assembled. During the work process, the staff can carry the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2 through the No. 1 sling 5.

[0031] Positioning holes are provided inside the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4; a connecting positioning rod 10 is provided at one end of the No. 1 inner mold steel plate 3; two groups of positioning rods are fixedly connected to one end of the connecting positioning rod 10; the two groups of positioning rods correspond to the positioning holes.

[0032] The staff can carry the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 through the No. 2 sling 9. After a group of No. 1 inner mold steel plate 3 and No. 2 inner mold steel plate 4 are fitted together, the positioning rod connected to one end of the positioning rod 10 is inserted into the positioning holes of the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4. The positions of the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 are limited by connecting the positioning rod 10 to avoid the position of the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 being offset during the construction process.

[0033] A crane hook 12 is provided at the top of the No. 1 outer form steel plate 1; the bottom end of the crane hook 12 is connected to an operating table 13; the bottom end of the operating table 13 is fixedly connected to multiple groups of steel wires 14, and the steel wires 14 are arranged above the No. 1 outer form steel plate 1; the bottom end of the steel wires 14 is fixedly connected to a disassembly hook 15; the disassembly hook 15 is arranged above the No. 1 sling 5 and the No. 2 sling 9.

[0034] After the concrete solidifies, the steel film needs to be disassembled. The staff can use the No. 1 sling 5 and the No. 2 sling 9 to carry the No. 1 outer form steel plate 1, the No. 2 outer form steel plate 2, the No. 1 inner form steel plate 3, and the No. 2 inner form steel plate 4. They can also use a small crane to carry them to improve work efficiency. The disassembly hook 15 at the bottom of the steel wire 14 is connected to the No. 1 sling 5 of the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2, and then the crane lifts the crane hook 12, so that the steel wire 14 lifts the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2 together for transportation. The disassembly hook 15 can also be connected to the No. 2 sling 9 for transportation.

[0035] A winding drum 16 is provided on one side of the steel wire 14 ; an electromagnet 17 is connected to the bottom end of the winding drum 16 ; and the electromagnet 17 is provided on one side of the disassembly hook 15 .

[0036] When the disassembly hook 15 is connected to the No. 1 sling 5, the electromagnet 17 can be connected and adsorbed to the disassembly hook 15. The staff can pull the wire of the electromagnet 17 to adjust the position of the disassembly hook 15 to connect with the No. 1 sling 5. After the connection, the magnetic suction of the electromagnet 17 is turned off, and the winding drum 16 is rotated to recycle the electromagnet 17.

[0037] An electric push rod 18 is fixedly connected to the bottom end of the operating table 13; a motor 19 is fixedly connected to the bottom end of the electric push rod 18; a disassembly bolt head 20 is fixedly connected to the output end of the motor 19; the disassembly bolt head 20 is arranged above the No. 1 outer mold steel plate 1; a magnet is arranged inside the disassembly bolt head 20, and the disassembly bolt head 20 corresponds to the positioning bolt 7.

[0038] The positioning bolt 7 can fix the position of the rotating connecting plate 6 and the positioning block 8. When the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2 need to be disassembled, the positioning bolt 7 must be disassembled first, and the position of the operating table 13 is adjusted by the crane hook 12, so that the electric push rod 18 is moved to the top of the positioning bolt 7. The disassembly bolt head 20 can be clamped to the top of the positioning bolt 7 by the electric push rod 18, and the positioning bolt 7 is grasped by the magnet inside the disassembly bolt head 20. The disassembly bolt head 20 is rotated by the motor 19 to disassemble the positioning bolt 7, and then the disassembled positioning bolt 7 is grasped by the movement of the crane hook 12, which is convenient for the subsequent disassembly of the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2.

[0039] The first outer mold steel plate 1 and the second outer mold steel plate 2 are both provided with limiting holes inside; and positioning rods 21 are inserted into the limiting holes.

[0040] During the construction process, it is necessary to assemble multiple groups of No. 1 outer formwork steel plates 1 and No. 2 outer formwork steel plates 2. After the first group of No. 1 outer formwork steel plates 1 and No. 2 outer formwork steel plates 2 are assembled, the positioning rod 21 is inserted into the limiting hole, and each subsequent group of No. 1 outer formwork steel plates 1 and No. 2 outer formwork steel plates 2 are inserted into the positioning rod 21, and the position is limited by the positioning rod 21 to avoid the subsequent No. 1 outer formwork steel plates 1 and No. 2 outer formwork steel plates 2 from positional displacement.

[0041] A steel formwork construction method for prefabrication of an inspection well comprises the following steps:

[0042] S1. The main body of the formwork is made of a 5mm thick high-strength steel plate, which has been treated with anti-corrosion to ensure that it will not rust in harsh environments for a long time. The surface of the inner formwork is covered with a 3mm thick composite material, which has good demoulding effect and durability. The No. 1 outer formwork steel plate 1, the No. 2 outer formwork steel plate 2 and the No. 1 inner formwork steel plate 3, the No. 2 inner formwork steel plate 4 are assembled and placed in the predetermined position. The symmetry and stability of the formwork are ensured by adjusting the connecting pieces, and the mixed concrete is poured into the well prefabricated groove 11;

[0043] S2. Use a vibrator to vibrate the concrete to make it dense and free of voids. During the vibration process, attention should be paid to the control of the vibration intensity and time to avoid excessive vibration that may cause damage to the concrete structure.

[0044] S3. The mold can only be removed after the concrete strength reaches the design requirements; after removal of the mold, the prefabricated inspection well needs to be covered and maintained to ensure the strength and stability of the inspection well.

[0045] The working principle of the present invention is as follows: when working, the No. 1 outer mold steel plate 1 and the No. 2 outer mold steel plate 2 are connected and assembled, and then the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 are spliced ​​and assembled, so that the No. 1 outer mold steel plate 1, the No. 2 outer mold steel plate 2, the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 are assembled to form a well prefabricated groove 11, and concrete is poured into the well prefabricated groove 11. The No. 1 outer mold steel plate 1, the No. 2 outer mold steel plate 2, the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 steel molds are made of high-quality steel, have extremely high strength and hardness, can withstand greater pressure and impact force, ensure the stability and safety of the well body structure, and the well body made of the steel mold has a longer service life and can withstand the underground environment for a long time. The steel mold and the well body made of it are usually treated with anti-corrosion, such as hot-dip galvanizing, etc., which can effectively resist the erosion of moisture, salt and other corrosive substances in the underground environment and prolong the service life. The prefabricated steel mold is convenient and quick to install on site, which reduces the amount of wet work on site and shortens the construction period. It has the advantages of quick installation, convenient disassembly, high reuse rate, low cost and high safety. Compared with the traditional template, the new template of the present invention significantly improves the efficiency and quality of inspection well manufacturing. After the work is completed, the No. 1 outer mold steel plate 1, the No. 2 outer mold steel plate 2, the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 are disassembled; when the No. 1 outer mold When the steel plate 1 fits with the side ends of the No. 2 outer form steel plate 2, the rotating connecting plate 6 is rotated to the positioning block 8, and then the positioning bolt 7 is rotated to penetrate the rotating connecting plate 6 and insert it into the interior of the positioning block 8, and the positions of the rotating connecting plate 6 and the positioning block 8 are fixed by the positioning bolt 7, so that the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2 are connected and assembled. During the work process, the staff can carry the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2 through the No. 1 sling 5; during the construction process, multiple groups of No. 1 outer form steel plates 1 and No. 2 outer form steel plates 2 need to be assembled. After the first group of No. 1 outer form steel plates 1 and No. 2 outer form steel plates 2 are assembled, the positioning rod 21 is inserted into the limiting hole, and each subsequent group of No. 1 outer form steel plates The steel plate 1 and the second outer mold steel plate 2 are both inserted into the positioning card rod 21, and the position is limited by the positioning card rod 21 to avoid the subsequent position deviation of the No. 1 outer mold steel plate 1 and the No. 2 outer mold steel plate 2; the staff can use the No. 2 sling 9 to carry the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4. After a group of No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 are fitted, the positioning rod connected to one end of the positioning plug rod 10 is inserted into the positioning hole of the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4, and the position of the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 is limited by connecting the positioning plug rod 10 to avoid the position deviation of the No. 1 inner mold steel plate 3 and the No. 2 inner mold steel plate 4 during the construction process;After the concrete solidifies, the steel membrane needs to be disassembled. The staff can use the No. 1 sling 5 and the No. 2 sling 9 to carry the No. 1 outer form steel plate 1, the No. 2 outer form steel plate 2, the No. 1 inner form steel plate 3, and the No. 2 inner form steel plate 4. They can also use a small crane to carry them to improve work efficiency. The disassembly hook 15 at the bottom of the steel wire 14 is connected to the No. 1 sling 5 of the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2, and then the crane lifts the crane hook 12, so that the steel wire 14 lifts the No. 1 outer form steel plate 1 and the No. 2 outer form steel plate 2 together for transportation. The disassembly hook 15 can also be connected to the No. 2 sling 9 for transportation; when the disassembly hook 15 is connected to the No. 1 sling 5, the electromagnet 17 can be connected to the disassembly hook 15 for adsorption, and the staff can pull the wire of the electromagnet 17 to adjust the position of the disassembly hook 15 and the No. 1 sling 5 After the connection, the magnet attraction of the electromagnet 17 is turned off, and the winding drum 16 is rotated to recycle the electromagnet 17; the positioning bolt 7 can fix the position of the rotating connecting plate 6 and the positioning block 8. When the No. 1 outer mold steel plate 1 and the No. 2 outer mold steel plate 2 need to be disassembled, the positioning bolt 7 is first disassembled, and the position of the operating table 13 is adjusted by the crane hook 12, so that the electric push rod 18 is moved to the top of the positioning bolt 7, and the disassembly bolt head 20 can be clamped to the top of the positioning bolt 7 by the electric push rod 18, and the positioning bolt 7 is grabbed by the magnet inside the disassembly bolt head 20, and the disassembly bolt head 20 is rotated by the motor 19 to disassemble the positioning bolt 7, and then the disassembled positioning bolt 7 is grabbed by the movement of the crane hook 12, which is convenient for the subsequent disassembly of the No. 1 outer mold steel plate 1 and the No. 2 outer mold steel plate 2. ;

[0046] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A steel mold device for prefabrication of inspection wells, characterized in that: It comprises a No. 1 outer formwork steel plate (1); the side end of the No. 1 outer formwork steel plate (1) is connected to a No. 2 outer formwork steel plate (2); a No. 1 inner formwork steel plate (3) is provided on the inner side of the No. 1 outer formwork steel plate (1); the side end of the No. 1 inner formwork steel plate (3) on the inner side of the No. 1 outer formwork steel plate (1) is connected to a No. 2 inner formwork steel plate (4); a well prefabricated groove (11) is provided between the No. 1 outer formwork steel plate (1) and the No. 1 inner formwork steel plate (3); the outer side walls of the No. 1 outer formwork steel plate (1) and the No. 2 outer formwork steel plate (2) are both fixedly connected to a No. 1 sling (5); the outer side walls of the No. 1 inner formwork steel plate (3) and the No. 2 inner formwork steel plate (4) are both fixedly connected to a No. 2 sling (9); and a connecting unit is provided on one side of the No. 1 outer formwork steel plate (1).

2. A steel mold device and construction method for prefabrication of inspection wells according to claim 1, characterized in that: The connection unit comprises a rotatable connection plate (6); the rotatable connection plate (6) is rotatably connected to the outer side wall of the No. 1 outer mold steel plate (1); the outer side wall of the No. 2 outer mold steel plate (2) is fixedly connected with a positioning block (8); the interior of the rotatable connection plate (6) is rotatably connected with a positioning bolt (7), and the positioning bolt (7) is threadedly connected to the positioning block (8).

3. A steel mold device for prefabrication of inspection wells according to claim 1, characterized in that: Positioning holes are provided inside the No. 1 inner mold steel plate (3) and the No. 2 inner mold steel plate (4); a connecting positioning rod (10) is provided at one end of the No. 1 inner mold steel plate (3); two groups of positioning rods are fixedly connected to one end of the connecting positioning rod (10); the two groups of positioning rods correspond to the positioning holes.

4. A steel mold device for prefabrication of inspection wells according to claim 1, characterized in that: A crane hook (12) is provided at the top of the No. 1 outer form steel plate (1); the bottom end of the crane hook (12) is connected to an operating table (13); the bottom end of the operating table (13) is fixedly connected to a plurality of sets of steel wires (14), and the steel wires (14) are arranged above the No. 1 outer form steel plate (1); the bottom end of the steel wires (14) is fixedly connected to a disassembly hook (15); the disassembly hook (15) is arranged above the No. 1 sling (5) and the No. 2 sling (9).

5. A steel mold device for prefabrication of inspection wells according to claim 4, characterized in that: A winding drum (16) is provided on one side of the steel wire (14); the bottom end of the winding drum (16) is connected to an electromagnet (17); and the electromagnet (17) is provided on one side of the disassembly hook (15).

6. A steel mold device for prefabrication of inspection wells according to claim 4, characterized in that: The bottom end of the operating table (13) is fixedly connected to an electric push rod (18); the bottom end of the electric push rod (18) is fixedly connected to a motor (19); the output end of the motor (19) is fixedly connected to a disassembly bolt head (20); the disassembly bolt head (20) is arranged above the No. 1 outer mold steel plate (1); a magnet is arranged inside the disassembly bolt head (20), and the disassembly bolt head (20) corresponds to the positioning bolt (7).

7. A steel mold device for prefabrication of inspection wells according to claim 1, characterized in that: The first outer mold steel plate (1) and the second outer mold steel plate (2) are both provided with limiting holes inside; and positioning clamping rods (21) are inserted into the limiting holes.

8. A steel formwork construction method for prefabrication of inspection wells based on the device according to any one of claims 1 to 7, characterized in that: The steps include: S1. The main body of the formwork is made of a high-strength steel plate with a thickness of 5 mm, which has been treated with anti-corrosion to ensure that it will not rust in harsh environments for long-term use. The surface of the inner formwork is covered with a layer of composite material with a thickness of 3 mm, which has good demoulding effect and durability. The No. 1 outer formwork steel plate (1), the No. 2 outer formwork steel plate (2) and the No. 1 inner formwork steel plate (3), and the No. 2 inner formwork steel plate (4) are assembled and placed in a predetermined position. The symmetry and stability of the formwork are ensured by adjusting the connecting pieces, and the mixed concrete is poured into the well prefabricated groove (11); S2. Use a vibrator to vibrate the concrete to make it dense and free of voids. During the vibration process, attention should be paid to the control of the vibration intensity and time to avoid excessive vibration that may cause damage to the concrete structure. S3. The mold can be removed only after the concrete strength reaches the design requirements; After demoulding, the prefabricated inspection well needs to be covered and maintained to ensure its strength and stability.

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