Concrete circular cylindrical structure connected with high-strength flexible grommet and prefabricated cylinder piece

Abstract

The present application relates to the technical field of concrete circular cylindrical structure, in particular to a concrete circular cylindrical structure and prefabricated cylinder piece based on high-strength flexible cable ring connection, the concrete circular cylindrical structure is sequentially spliced by a plurality of prefabricated cylinder pieces which are cut along the circumferential direction and the vertical direction, the lower end of the cylinder piece is provided with a "convex" joint for positioning and temporary support, the left and right ends of the cylinder piece are provided with key grooves for forming a shear key structure; the lower end of the "convex" joint is provided with a "concave" notch for forming a horizontal hole; high-strength flexible cable rings are used to connect the horizontal joint and the vertical joint between adjacent cylinder pieces, and the connection mode of the joint is pouring concrete / grouting material and the like, which solves the problems of traditional silos, working caissons and other circular cylindrical structures related to on-site concrete pouring, waste of manpower and material resources, easy to be limited by weather, construction period and other factors, long construction period, high process technology requirement and being not conducive to green environmental protection and the like.

Description

Technical Field

[0001] This invention relates to the field of concrete circular cylindrical structure technology, specifically to a concrete circular cylindrical structure and precast cylindrical segments based on high-strength flexible cable ring connections. Background Technology

[0002] With social development and the improvement of industrial production levels, the quantity and requirements of engineering construction are also increasing. Working caissons have advantages such as low unit cost, small construction site area, the main concrete being spliced ​​or poured on the ground, easy quality assurance, and convenient and reliable waterproofing treatment at joints, and have been widely used in various engineering fields.

[0003] Silos, a type of bulk grain storage widely used in countries around the world, play a role in regulating, circulating, and buffering bulk grain during loading, unloading, storage, and transportation. Traditionally, the construction of cylindrical concrete structures such as working shafts and silo walls often employs cast-in-place concrete technology. This requires the erection of support molds and complex mold supports, and further construction can only proceed after the concrete reaches the required strength. This process is lengthy, difficult, and causes significant environmental pollution, failing to meet the demands of green and environmentally friendly development. Summary of the Invention

[0004] The purpose of this invention is to provide a concrete circular cylindrical structure and precast cylindrical segments based on high-strength flexible cable ring connections, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] The concrete circular cylindrical structure based on high-strength flexible cable ring connection is composed of multiple prefabricated cylindrical segments cut along the circumferential and vertical directions and sequentially spliced ​​together. The cylindrical segments include the bottom surface and the side surface of the cylindrical segments.

[0007] The bottom surface of the cylindrical plate is provided with a convex joint for positioning and temporary support. The lower end of the convex joint is also provided with a concave through-hole. The top surface of the cylindrical plate is provided with a positioning groove and a concave grout hole that runs through the circumference of the cylindrical plate. The positioning groove is adapted to the convex joint. The side surface of the cylindrical plate is also provided with a concave keyway to form a shear key structure. The concave grout hole, the bottom surface of the cylindrical plate, and the concave keyway are all rough surfaces to facilitate the bonding of the post-cast material at the joint with the cylindrical plate.

[0008] The steel mesh inside the cylindrical section does not have any reinforcing bars. The joints between multiple cylindrical sections are connected by high-strength flexible cable rings, and the high-strength flexible cable rings connecting the horizontal joints and the high-strength flexible cable rings connecting the vertical joints are distributed in two layers, inner and outer.

[0009] As a further aspect of the present invention: when splitting along the circumferential direction, the splitting method can be equal or unequal, and the splitting method can also be unequal. When splitting along the vertical direction, the height of each of the cylindrical pieces is 2-3m.

[0010] As a further aspect of the present invention: the vertical joint can be formed as a continuous vertical joint along the well wall, or it can be formed as a staggered joint connection.

[0011] As a further embodiment of the present invention: a stable connection mechanism is provided between two vertically adjacent cylindrical plates, the stable connection mechanism including a bidirectional telescopic component installed on the cylindrical plate and a threaded limiting component that cooperates with the bidirectional telescopic component;

[0012] The bidirectional telescopic component is triggered when the two cylindrical plates are docked and can perform a locking action on the two cylindrical plates. When the threaded limiting component moves, it can cooperate with the bidirectional telescopic component.

[0013] As a further embodiment of the present invention: the bidirectional telescopic assembly includes a cylinder fixedly mounted on the cylindrical plate by an assembly arm, and a cylindrical cavity is provided at each end of the cylinder, and a telescopic rod is slidably provided in each of the two cylindrical cavities;

[0014] One end of the telescopic rod is equipped with a locking wheel, which cooperates with a limiting member provided on the cylindrical plate. The other end of the telescopic rod is connected to a cylindrical spring provided in the cylindrical cavity, and the other end of the cylindrical spring is connected to the inner wall of the cylindrical cavity.

[0015] As a further embodiment of the present invention: the limiting member includes two locking plates fixed on the cylindrical plate, the locking plate includes a connected inclined portion and a vertical portion, and the vertical portion is provided with a locking opening, the locking opening being used for the locking wheel and the telescopic rod to pass through.

[0016] As a further embodiment of the present invention: the cylinder is also fixedly connected to a force-bearing plate, and each side of the force-bearing plate is provided with an inclined surface that can cooperate with the threaded limiting assembly. The threaded limiting assembly includes an assembly plate fixed on the cylinder, a bidirectional lead screw rotatably mounted on the assembly plate, and a threaded sleeve sleeved on the bidirectional lead screw and threadedly connected to the bidirectional lead screw.

[0017] Each of the two threaded sleeves is equipped with a fastening wheel, and a protruding post is fixed on the outer wall of the threaded sleeve. The assembly plate is provided with a guide groove that matches the protruding post, and the protruding post extends into the guide groove and is slidably connected to the assembly plate.

[0018] Precast cylindrical segments, the precast cylindrical segments including the concrete circular cylindrical structure based on high-strength flexible cable ring connection.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention has a novel design. The concrete circular cylindrical structure is formed by sequentially splicing together several precast cylindrical segments (hereinafter referred to as segments) cut along the circumferential and vertical directions. The horizontal and vertical joints between adjacent segments are connected by high-strength flexible cable rings. The connection method of post-cast concrete / grouting material at the joints gives the concrete circular cylindrical structure good integrity. At the same time, it can effectively solve the problems of long construction cycle, complex construction and waste, and the disadvantages of resource protection and environmental protection in the prior art, providing a more efficient, environmentally friendly and economical solution for engineering construction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of one embodiment of a concrete circular cylindrical structure based on a high-strength flexible cable ring connection.

[0021] Figure 2 for Figure 1 The front view.

[0022] Figure 3 for Figure 1 Top view.

[0023] Figure 4 This is a schematic diagram of the cylindrical section in one embodiment of a concrete circular cylindrical structure based on a high-strength flexible cable ring connection.

[0024] Figure 5 for Figure 4 A top view diagram.

[0025] Figure 6 for Figure 4 A schematic diagram of the bottom surface.

[0026] Figure 7 for Figure 4 A side view diagram.

[0027] Figure 8 This is a schematic diagram of the cutting edge in one embodiment of a concrete circular cylindrical structure based on a high-strength flexible cable ring connection.

[0028] Figure 9 for Figure 8 A front view illustration.

[0029] Figure 10 for Figure 8 A side view diagram.

[0030] Figure 11This is a schematic diagram and a partial enlarged view of the pre-embedded high-strength flexible cable ring structure in one embodiment of a concrete circular cylindrical structure based on high-strength flexible cable ring connection.

[0031] Figure 12 for Figure 11 AA cross-section and enlarged view of a part.

[0032] Figure 13 This is a schematic diagram of a keyway template and a high-strength flexible cable ring fixed to the keyway template in one embodiment of a concrete circular cylindrical structure based on a high-strength flexible cable ring connection (a: front view of the keyway template; b: side view of the keyway template; c: schematic diagram of the high-strength flexible cable ring fixed to the keyway template during the prefabrication of the cylindrical section).

[0033] Figure 14 This is a schematic diagram of a horizontal joint connection in one embodiment of a concrete circular cylindrical structure based on a high-strength flexible cable ring connection.

[0034] Figure 15 for Figure 14 BB cross-section.

[0035] Figure 16 A schematic diagram of a high-strength flexible cable ring rotated 90° to insert reinforcing bars for connecting horizontal joints.

[0036] Figure 17 for Figure 17 This is a schematic diagram and a magnified view of a vertical seam connection (I).

[0037] Figure 18 for Figure 18 This is a schematic diagram and a magnified view of the vertical joint connection (II).

[0038] Figure 19 This is a schematic diagram of a stable connection mechanism in one embodiment of a concrete circular cylindrical structure based on a high-strength flexible cable ring connection.

[0039] Figure 20 This is a schematic diagram of the stabilizing connection mechanism from another angle in one embodiment of a concrete circular cylindrical structure based on a high-strength flexible cable ring connection.

[0040] Figure 21 An exploded view of the stable connection mechanism in one embodiment of a concrete circular cylindrical structure based on a high-strength flexible cable ring connection.

[0041] In the diagram: 1. Segment; 101. Reinforcing mesh; 102. Concrete body; 103. Convex joint; 104. Positioning groove; 105. Concave grout hole; 106. Bottom surface of the segment; 107. Side surface of the segment; 108. Concave keyway; 109. Concave continuous groove; 2. High-strength flexible cable ring; 201. High-strength flexible cable ring connecting horizontal joints; 202. High-strength flexible cable ring connecting vertical joints; 203. Auxiliary reinforcement; 3. Joint; 301. Horizontal joint; 302. Vertical joint; 303. Horizontal joint reinforcing bar; 304. Horizontal joint grout; 305. Vertical joint reinforcing bar; 306. Vertical joint grout; 4. Precast cutting edge section; 401. Cutting edge portion of precast cutting edge section; 402. Well wall portion of precast cutting edge section; 5. Vertical joint keyway template; 501. Reserved hole of vertical joint keyway template; 502. Positioning key of vertical joint keyway template; 6. Fastening wheel; 7. Assembly arm; 8. Locking wheel; 9. Cylinder; 10. Telescopic rod; 11. Cylindrical spring; 12. Load-bearing plate; 1201. Inclined surface; 13. Locking plate; 1301. Inclined part; 1302. Vertical part; 1303. Locking port; 14. Assembly plate; 1401. Guide groove; 15. Two-way screw rod; 16. Threaded sleeve; 1601. Protruding column. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0044] Secondly, in the description of this invention, the drawing scale of the cylindrical segments, joints, steel mesh, high-strength flexible cable rings, etc. is only for the purpose of facilitating the description of the present invention and simplifying the description, and does not indicate or imply their specific quantity, size, diameter, spacing, etc.; the anchorage length L1 of the high-strength flexible cable ring in the cylindrical segment and the anchorage length L2 in the joint should be specifically determined according to the diameter of the high-strength flexible cable ring, the arrangement of distributed steel bars, the concrete strength, the type of post-cast material, whether or not reinforcement is threaded through, etc.

[0045] Please see Figures 1-18In this embodiment of the invention, the concrete circular cylindrical structure based on high-strength flexible cable ring connection is formed by sequentially splicing multiple prefabricated cylindrical segments 1 cut along the circumferential and vertical directions. The cylindrical segment 1 includes a bottom surface 106 and a side surface 107.

[0046] The bottom surface 106 of the cylindrical plate is provided with a convex joint 103, which is used for positioning and temporary support. The lower end of the convex joint 103 is also provided with a concave through-hole 109. The top surface of the cylindrical plate 1 is provided with a positioning groove 104 and a concave grout hole 105 that runs through the circumference of the cylindrical plate 1. The positioning groove 104 is adapted to the convex joint 103. The side surface 107 of the cylindrical plate is also provided with a concave keyway 108 to form a shear key structure. The concave grout hole 105, the bottom surface 106 of the cylindrical plate, and the concave keyway 108 are all rough surfaces to promote the bonding of the joint post-cast material with the cylindrical plate 1.

[0047] The reinforcing mesh 101 within the cylindrical section 1 is not reinforced. The joints between multiple cylindrical sections 1 are connected using high-strength flexible cable rings 2. Both the horizontal joint 301 connected to the high-strength flexible cable rings 201 and the vertical joint 302 connected to the high-strength flexible cable rings 203 are distributed in two layers, inner and outer. High-strength flexible cable rings refer to flexible cable rings with a tensile strength exceeding 550 MPa.

[0048] It should be further noted that the concave grout hole 105, the bottom surface of the cylinder 106, and the concave keyway 108 are all rough surfaces, which is beneficial to the bonding of the post-cast material at the joint and the cylinder 1, and at the same time, it is beneficial to improve the shear resistance of the joint 3 area.

[0049] During the manufacturing of the cylindrical segment 1, the high-strength flexible cable ring 2 is positioned inside the cylindrical segment 1. The anchoring can be achieved by wrapping the high-strength flexible cable ring 2 around the steel mesh 101, or by arranging auxiliary steel bars 203 perpendicular to the high-strength flexible cable ring 2, and binding the auxiliary steel bars 203 to the steel mesh 101 of the cylindrical segment 1.

[0050] During the prefabrication of cylindrical segments, the reinforcing mesh 101 inside the cylindrical segment 1 does not extend beyond the reinforcing bars. The joints 3 between the cylindrical segments 1 are connected by high-strength flexible cable rings 2. The high-strength flexible cable rings 201 connecting the horizontal joints and the high-strength flexible cable rings 202 connecting the vertical joints are distributed in two layers, inner and outer. The high-strength flexible cable rings 2 are positioned and anchored inside the cylindrical segment 1 by wrapping the reinforcing mesh 101 with high-strength flexible cables, or by arranging auxiliary reinforcing bars 203 perpendicular to the high-strength flexible cable rings 2 and binding the auxiliary reinforcing bars 203 to the cylindrical segment reinforcing mesh 101. The high-strength flexible cable rings 202 at the vertical joints can pass through the reserved holes 501 of the keyway template 5, be laid flat, and be positioned and fixed by positioning keys 502 to prevent the high-strength flexible cable rings 2 from shifting.

[0051] When connecting the joints 3 between the cylindrical segments 1, the high-strength flexible cable ring 2 can be connected by either through reinforcing bars or without reinforcing bars. When the high-strength flexible cable ring 2 is connected by through reinforcing bars, the extended high-strength flexible cable ring 2 needs to be rotated 90° before being inserted into the reinforcing bars. The direction of the inserted reinforcing bars in the vertical joint 302 is vertical, and the direction of the inserted reinforcing bars in the horizontal joint 301 is circumferential. The post-cast material for the joint can be plain concrete, micro-expansion concrete, high-strength concrete, or high-strength grouting material, etc.

[0052] When applied to the field of working caissons, the prefabricated cutting edge section 4 is prefabricated in an integrated manner with the prefabricated cutting edge section cutting edge part 401 and the prefabricated cutting edge section well wall part 402 of a certain height. The connection structure of the horizontal joint 301 and the vertical joint 302 is the same as the connection structure of the cylinder 1.

[0053] When splitting along the circumferential direction, equal or unequal division can be used. When splitting along the vertical direction, the height of each of the cylindrical segments 1 is 2-3m.

[0054] Furthermore, when a concrete circular cylindrical structure is divided along the circumferential direction, it can be divided into 4 equal parts, 6 equal parts, 8 equal parts, or unequal division methods. When a concrete circular cylindrical structure is divided along the vertical direction, the height of each segment should be 2-3m, or other segment heights can be used.

[0055] The vertical joint 302 can form a continuous vertical joint along the well wall, or it can form a staggered joint connection.

[0056] When connecting the joints 3 between the cylindrical sections 1, the high-strength flexible cable ring 2 can be connected by either through reinforcing bars or without reinforcing bars. When the high-strength flexible cable ring 2 is connected by through reinforcing bars, the extended high-strength flexible cable ring needs to be rotated 90° before being inserted through the reinforcing bars. The direction of the through reinforcing bars (horizontal joint insert 303) of the horizontal joint 201 is along the circumferential direction of the well wall, and the direction of the through reinforcing bars (vertical joint insert 305) of the vertical joint 202 is vertical. The post-cast material of the horizontal joint (horizontal joint grout 304) and the post-cast material of the vertical joint (vertical joint grout 306) can be plain concrete, micro-expansion concrete, high-strength concrete, or high-strength grout, etc. The post-cast material of the horizontal joint can form a continuous flow along the concave grout hole 105. There is also an intersection between the horizontal joint and the vertical joint, which can effectively improve the overall structure and water tightness. At the same time, when connecting the joints, water-stop rubber strips or water-stop steel plates can be reasonably arranged to improve water tightness.

[0057] Please participate Figure 19-21 A stabilizing connection mechanism is also provided between two vertically adjacent cylindrical plates 1. The stabilizing connection mechanism includes a bidirectional telescopic component installed on the cylindrical plate 1 and a threaded limiting component that cooperates with the bidirectional telescopic component.

[0058] The bidirectional telescopic component is triggered when the two cylindrical plates 1 are connected and can perform a locking action on the two cylindrical plates 1. When the threaded limiting component moves, it can cooperate with the bidirectional telescopic component.

[0059] The bidirectional telescopic assembly includes a cylinder 9 fixedly mounted on the cylindrical plate 1 via an assembly arm 7. Each end of the cylinder 9 is provided with a cylindrical cavity, and a telescopic rod 10 is slidably disposed in each of the two cylindrical cavities.

[0060] One end of the telescopic rod 10 is equipped with a locking wheel 8, which cooperates with a limiting member provided on the cylindrical plate 1. The other end of the telescopic rod 10 is connected to a cylindrical spring 11 provided in the cylindrical cavity, and the other end of the cylindrical spring 11 is connected to the inner wall of the cylindrical cavity.

[0061] The limiting member includes two locking plates 13 fixed on the cylindrical plate 1. The locking plate 13 includes an inclined portion 1301 and a vertical portion 1302 connected together. The vertical portion 1302 is provided with a locking opening 1303, which is used for the locking wheel 8 and the telescopic rod 10 to pass through.

[0062] When assembling the two cylindrical plates 1, initially, the locking wheel 8 acts on the inclined portion 1301, causing the locking wheel 8 to give way, prompting the telescopic rod 10 to slide towards the cylindrical cavity, and the cylindrical spring 11 to be compressed. Subsequently, the locking wheel 8 rolls along the vertical portion 1302. After the two cylindrical plates 1 are connected, the locking wheel 8 rolls exactly to the locking port 1303. Then, the locking wheel 8 and the telescopic rod 10 pass through the locking port 1303, realizing the connection and locking function of the two cylindrical plates 1.

[0063] The cylinder 9 is also fixedly connected to a force-bearing plate 12. Each side of the force-bearing plate 12 is provided with an inclined surface 1201 that can cooperate with the threaded limiting assembly. The threaded limiting assembly includes an assembly plate 14 fixed on the cylinder 1, a bidirectional lead screw 15 rotatably mounted on the assembly plate 14, and a threaded sleeve 16 sleeved on the bidirectional lead screw 15 and threadedly connected to the bidirectional lead screw 14.

[0064] Each of the two threaded sleeves 16 is equipped with a fastening wheel 6. A protrusion 1601 is also fixed on the outer wall of the threaded sleeve 16. The assembly plate 14 is provided with a guide groove 1401 that is adapted to the protrusion 1601. The protrusion 1601 extends into the guide groove 1401 and is slidably connected to the assembly plate 14.

[0065] After the locking wheel 8 and the telescopic rod 10 pass through the locking port 1303, the bidirectional lead screw 15 rotates. As a result, the protrusion 1601 and the guide groove 1401 guide the threaded sleeve 16. The two threaded sleeves 16 engage with the bidirectional lead screw 15 and move closer to each other. Correspondingly, the fastening wheel 6 acts on the inclined surface 1201, so that the force plate 12 exerts a certain pulling force on the cylindrical plate 1 through the cylinder 9 and the assembly arm 7, thereby greatly improving the stability of the connection between two vertically adjacent cylindrical plates 1.

[0066] As an embodiment of the present invention, a precast cylindrical segment is also proposed, the precast cylindrical segment comprising the aforementioned concrete circular cylindrical structure based on high-strength flexible cable ring connection.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0068] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A concrete circular cylindrical structure based on high-strength flexible cable ring connection, which is sequentially spliced by a plurality of prefabricated cylinder pieces (1) cut along the circumferential and vertical directions, the cylinder piece (1) comprising a cylinder piece bottom surface (106) and a cylinder piece side surface (107); characterized in that the cylinder piece bottom surface (106) is provided with a male joint (103) for positioning and temporary support, the lower end of the male joint (103) is further provided with a female through slot (109), and the top surface of the cylinder piece (1) is provided with a positioning slot (104) and a female mortar hole (105) extending along the circumferential direction of the cylinder piece (1), the positioning slot (104) is adapted to the male joint (103), the cylinder piece side surface (107) is further provided with a female key groove (108) for forming a shear key structure, and the female mortar hole (105), the cylinder piece bottom surface (106) and the female key groove (108) are all rough surfaces to facilitate the combination of joint post-poured material with the cylinder piece (1); the reinforcement mesh (101) in the cylinder piece (1) is not out of the reinforcement, the joints between a plurality of cylinder pieces (1) are connected by high-strength flexible cable rings (2), and the horizontal joint (301) connecting the high-strength flexible cable ring (2) and the vertical joint (302) connecting the high-strength flexible cable ring (2) are both distributed in two layers from inside to outside, a stable connection mechanism is further provided between two vertically adjacent cylinder pieces (1), the stable connection mechanism comprises a bidirectional telescopic assembly mounted on the cylinder piece (1) and a threaded limiting assembly cooperating with the bidirectional telescopic assembly; wherein the bidirectional telescopic assembly is triggered when the two cylinder pieces (1) are butted, and can perform a locking action on the two cylinder pieces (1), and when the threaded limiting assembly moves, it can cooperate with the bidirectional telescopic assembly.

2. The high-strength flexible cable loop based concrete circular cylindrical structure according to claim 1, characterized by, The bidirectional telescopic assembly comprises a cylinder (9) fixedly mounted on the cylinder piece (1) through a mounting arm (7), both ends of the cylinder (9) are respectively provided with a cylindrical chamber, and a telescopic rod (10) is slidably arranged in each of the two cylindrical chambers; wherein one end of the telescopic rod (10) is provided with a locking wheel (8), the locking wheel (8) cooperates with a limiting piece provided on the cylinder piece (1), the other end of the telescopic rod (10) is connected with a cylindrical spring (11) provided in the cylindrical chamber, and the other end of the cylindrical spring (11) is connected with the inner wall of the cylindrical chamber.

3. A concrete circular cylindrical structure based on high-strength flexible grommet connection according to claim 2, characterized in that, The limiting piece comprises two locking plates (13) fixed on the cylinder piece (1), the locking plate (13) comprises a connected inclined portion (1301) and a vertical portion (1302), and the vertical portion (1302) is provided with a locking opening (1303), the locking opening (1303) is used for the locking wheel (8) and the telescopic rod (10) to pass through.

4. The high-strength flexible cable loop based concrete circular cylindrical structure according to claim 3, characterized by, The cylinder (9) is further fixedly connected with a stress plate (12), two sides of the stress plate (12) are each provided with an inclined surface (1201) capable of cooperating with the threaded limiting assembly, the threaded limiting assembly comprises an assembling plate (14) fixed on the cylinder sheet (1), a bidirectional screw rod (15) rotatably installed on the assembling plate (14), a threaded sleeve (16) sleeved on the bidirectional screw rod (15) and threadedly connected with the bidirectional screw rod (15); Wherein, one fastening wheel (6) is respectively installed on the two threaded sleeves (16), the outer wall of the threaded sleeve (16) is further fixed with a convex column (1601), the assembling plate (14) is provided with a guide groove (1401) matched with the convex column (1601), the convex column (1601) extends into the guide groove (1401) and is in sliding connection with the assembling plate (14).

5. A preformed cartridge, characterized by The prefabricated cylinder sheet comprises the concrete circular cylindrical structure connected based on the high-strength flexible grommet according to any one of claims 1-4.

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