Quick mounting and dismounting structure of inner template of prefabricated well seat cover plate

Abstract

The utility model discloses a prefabricated well seat cover plate inner formwork quick assembly and disassembly structure, including outer form and inner form, the outer form is with the inner form between and forms well seat cover plate, the center of well seat cover plate is equipped with the hole of going down to a person, the outer form includes the I -steel of four -around, and the inner form includes the annular inner ring sheet iron, the inside of inner ring sheet iron is filled with sandstone, the inner form still includes the multiple vertical reinforcing bars of array setting, and the end of inner ring sheet iron all is equipped with the integral square steel strip, this prefabricated well seat cover plate inner formwork quick assembly and disassembly structure can guarantee the precision of inner form round structure, improves the appearance quality of the hole of going down to a person, and convenient to dismouting still can repeatedly use, reduces material consumption, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of drainage well construction technology, and in particular to a quick assembly and disassembly structure for the inner template of a prefabricated well seat cover plate. Background Technology

[0002] With the rapid development of road construction in my country, road drainage has become increasingly important, and road manholes are an indispensable part of this. As the scale of roads gradually expands, the construction volume of corresponding manholes also increases year by year. Thus, the construction volume of manhole bases, as an important part of manholes, is also gradually increasing.

[0003] The structure of the manhole base is relatively simple, and its thickness is generally around 20cm. The prefabrication of the manhole base can be carried out on the construction site. The inner mold of the conventional manhole base (the location of the lower manhole) is usually made by splicing wooden templates into a whole, and the inside of the wooden template is supported by square timber.

[0004] Using wooden formwork for support has the following problems: 1. The installation and removal of the inner formwork both require disassembling the formwork, which is cumbersome, inefficient, and slow; 2. The circular structure formed by splicing wooden formwork is rough, resulting in low precision and unevenness of the circular surface, leading to poor appearance quality of the inner wall of the manhole after pouring; 3. The wooden formwork is spliced ​​and disassembled multiple times, resulting in rapid breakage, low turnover rate, and significant material waste.

[0005] Therefore, there is an urgent need for a template structure that can ensure the accuracy of the inner mold circular structure, improve the appearance quality of the lower manhole, and facilitate assembly and disassembly. Utility Model Content

[0006] The purpose of this utility model is to solve the above problems by providing a quick assembly and disassembly structure for the inner template of a prefabricated manhole cover that can ensure the accuracy of the inner mold circular structure, improve the appearance quality of the lower manhole, and facilitate disassembly and reuse.

[0007] To achieve the above objectives, the technical solution of this utility model is as follows: a quick assembly and disassembly structure for a prefabricated manhole cover inner template, comprising an outer mold and an inner mold, wherein a manhole cover is formed between the outer mold and the inner mold, and a manhole is provided at the center of the manhole cover; the outer mold comprises H-beams around the perimeter, and the inner mold comprises an annular inner iron sheet, the interior of which is filled with sand and gravel.

[0008] Preferably, the inner mold further includes a plurality of vertical reinforcing ribs arranged in an array, all of which are fixed to the inner wall of the inner ring sheet metal, and the cross-section of the vertical reinforcing ribs is triangular.

[0009] Preferably, each end of the inner ring sheet metal is provided with an integral square steel bar. One of the square steel bars has multiple grooves on its outer side and a through hole through the multiple grooves on its top. The other square steel bar has multiple protrusions on its outer side. Each protrusion has a vertically arranged through hole. The protrusions correspond one-to-one with the grooves. The inner diameter of the through hole is the same as that of the through hole.

[0010] Preferably, the outer surface of the inner sheet metal is further provided with a shaping ring.

[0011] Preferably, the shaping ring includes multiple arc-shaped ribs, and each pair of adjacent arc-shaped ribs is connected by an elastic cord. The elastic cord is provided with a tension spring on its outside, and the two ends of the tension spring are respectively fixed to the ends of the arc-shaped ribs.

[0012] Preferably, the arc-shaped rib includes multiple connecting columns, one end of which is provided with a hinge block and the other end is provided with a socket that mates with the hinge block. The curvature of the arc-shaped rib is adaptively adjusted by the hinge block and the socket.

[0013] Preferably, under normal conditions, the inner diameter of the shaping ring is smaller than the inner diameter of the lower manhole.

[0014] This utility model discloses a quick-assembly and disassembly structure for the inner template of a prefabricated manhole cover, comprising an outer mold and an inner mold, with a manhole cover formed between the outer mold and the inner mold, and a manhole located at the center of the manhole cover. The outer mold includes H-beams around its perimeter, and the inner mold includes an annular inner sheet metal filled with sand and gravel. The inner mold also includes multiple vertical reinforcing ribs arranged in an array, and each end of the inner sheet metal is provided with an integral square steel strip. Compared with the prior art, this quick-assembly and disassembly structure for the inner template of a prefabricated manhole cover has the advantages of ensuring the accuracy of the circular structure of the inner mold, improving the appearance quality of the manhole, facilitating disassembly and assembly, allowing for multiple reuses, reducing material consumption, and being highly practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a prefabricated manhole cover plate inner template quick assembly and disassembly structure according to the present invention.

[0016] Figure 2 This is a schematic diagram of the inner mold in the quick assembly and disassembly structure of the inner template of the prefabricated well seat cover plate of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the manhole cover plate in the quick assembly and disassembly structure of the inner template of the prefabricated manhole cover plate of this utility model.

[0018] Figure 4 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0019] Figure 5This is a schematic diagram of the second embodiment of the quick assembly and disassembly structure of the inner template of the prefabricated well seat cover plate of this utility model.

[0020] Figure 6 This utility model Figure 5 A magnified structural diagram at point B in the middle.

[0021] In the diagram: 1. Outer mold; 2. Manhole cover; 21. Manhole; 3. Inner mold; 31. Inner ring sheet metal; 311. Square steel bar; 312. Groove; 313. Protrusion; 314. Through hole; 315. Through hole; 32. Vertical reinforcing rib; 33. Shaping collar; 331. Arc-shaped rib; 3311. Connecting column; 3312. Hinge block; 332. Elastic rope; 333. Tension spring. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] Please refer to Figure 1-4 A quick assembly and disassembly structure for a prefabricated manhole cover inner template includes an outer mold 1 and an inner mold 3, with a manhole cover 2 formed between the outer mold 1 and the inner mold 3. A manhole 21 is provided at the center of the manhole cover 2. The outer mold 1 includes H-beams around the perimeter, and the inner mold 3 includes an annular inner iron sheet 31, with sand and gravel filling the interior of the inner iron sheet 31.

[0024] After the inner ring sheet 31 is fixed, concrete is poured between the inner ring sheet 31 and the I-beam. After solidification, it is demolded to form the manhole cover plate 3. Due to the setting of the inner ring sheet 31, it is not only conducive to quick demolding, but also ensures the circular accuracy of the manhole.

[0025] Understandably, steel bars are also provided between the outer mold 1 and the inner mold 3 to increase the strength of the well cover plate 2 after pouring.

[0026] In this embodiment, the inner mold 3 also includes a plurality of vertical reinforcing ribs 32 arranged in an array. The plurality of vertical reinforcing ribs 32 are all welded and fixed to the inner wall of the inner ring sheet 31. The cross section of the vertical reinforcing ribs 31 is triangular. The arrangement of the vertical reinforcing ribs 31 can support the inner ring sheet 31, so that the inner ring sheet 31 and the vertical reinforcing ribs 32 form the inner mold outline structure, avoiding deformation caused by the weak rigidity of the inner ring sheet 31, and further ensuring the casting accuracy of the lower manhole.

[0027] Furthermore, each end of the inner ring sheet metal 31 is provided with an integral square steel bar 311. One of the square steel bars 311 has multiple grooves 312 on its outer side and a through hole 315 through the multiple grooves 312 on its top. The other square steel bar 311 has multiple protrusions 313 on its outer side. Each protrusion 313 has a vertically arranged through hole 314. Each protrusion 313 corresponds to a groove 312. The inner diameter of the through hole 315 is the same as that of the through hole 314.

[0028] The purpose of setting the square steel bars 311 on both sides is to increase the mating area of ​​the inner ring sheet metal 31. When the mating is circular, the protrusion 313 can be inserted into the corresponding groove 312. Then, the protrusion 313 is inserted through the through hole 315 by a screw, steel bar or other rod-shaped object, so that it is locked in the groove 312, thereby ensuring the integrity of the inner ring sheet metal.

[0029] To further ensure the stability of the inner ring sheet 31 during filling, a shaping ring 33 is provided on the outside of the inner ring sheet 31. In this embodiment, the shaping ring 33 is a rigid ring, specifically a circle formed by bending steel bars. After it is fitted on the outside of the inner ring sheet 31, it prevents the inner ring sheet 31 from deforming outward.

[0030] Please refer to Figure 5-6 Based on the above embodiments, in order to enable the shaping collar 33 to automatically shrink so that it can adapt to manholes of different diameters, the shaping collar 33 in this embodiment includes a plurality of arc-shaped ribs 331. Each pair of adjacent arc-shaped ribs 331 are connected by an elastic rope 332. The elastic rope 332 is provided with a tension spring 333 on its outside. The two ends of the tension spring 333 are respectively fixed to the ends of the arc-shaped ribs 331.

[0031] Due to the tension cord 332 and the tension spring 333, the distance between two adjacent arc-shaped ribs 331 can adaptively expand and contract within a certain range. When the outer diameter of the inner ring sheet 31 is large, the tension cord 332 and the tension spring 333 are stretched, and the distance between two adjacent arc-shaped ribs 331 increases accordingly. Similarly, when the outer diameter of the inner ring sheet 31 is small, the tension cord 332 and the tension spring 333 are stretched slightly, and the distance between two adjacent arc-shaped ribs 331 decreases relatively, thereby improving the adaptability of the shaping ring 33 to the inner ring sheet 31.

[0032] When adaptively adjusting the adaptation capability, in order to change the curvature of the arc-shaped rib 331 accordingly, the arc-shaped rib 331 includes multiple connecting columns 3311. One end of the connecting column 3311 is provided with a hinge block 3312, and the other end is provided with a socket that mates with the hinge block 3312. The curvature of the arc-shaped rib 331 is adaptively adjusted through the hinge block 3311 and the socket. When the outer diameter of the inner ring sheet metal 31 increases, the curvature of the arc-shaped rib 31 increases accordingly.

[0033] Based on the above embodiments, under normal conditions, the inner diameter of the shaping collar 33 is smaller than the inner diameter of the lower manhole 21. That is to say, during use, the tension rope 332 and the tension spring 333 are always stretched. The contraction tension of the tension rope 332 and the tension spring 333 causes the arc-shaped rib 31 to be tightly bound to the outer wall of the inner ring sheet 31, so as to prevent the inner ring sheet 31 from deforming outward.

[0034] The main advantages of using sheet metal as the inner mold are as follows: 1. It has great flexibility, is easy to bend into a circular structure, and is easy to shrink for easy demolding and construction; 2. Stainless steel itself has a certain strength and can form a vertical mold structure together with the main and secondary keels; 3. It has corrosion resistance and fatigue resistance, can be reused many times, and has a high turnover rate.

[0035] The purpose of the shaping ring 33 is to fix the inner ring sheet to prevent the inner ring from moving when filling with sand and gravel; at the same time, it ensures that the inner ring sheet does not deform when filling the space of the inner ring sheet, so that the cast round hole matches the manhole.

[0036] The construction method of this utility model includes the following steps: S1: First, install the outer mold at the construction site; S2: Place the inner ring iron sheet inside the outer mold, so that the shaping ring is fitted over the outer side of the inner ring iron sheet; S3: Fill the internal space of the inner ring iron sheet with sand and gravel, and remove the outer shaping ring after filling; wherein the ratio of sand to gravel is 1:1; S4: Pour concrete between the outer mold and the inner ring iron sheet; S5: After the well base cover plate is poured and the demolding conditions are met, remove the sand and gravel from the inner ring iron sheet and loosen the inner ring iron sheet to complete the demolding.

[0037] In step S2, the method for manufacturing the inner ring sheet metal includes the following steps: S201: Using sheet metal with a thickness of 1.0mm to form a circular structure, wherein the outer diameter of the inner ring sheet metal is consistent with the inner diameter of the lower manhole, and square steel bars are welded to the ends of the sheet metal; S202: Welding vertical reinforcing ribs to the inner wall of the sheet metal, with a spacing of 10cm between adjacent vertical reinforcing ribs; S203: Connecting two square steel bars and inserting a locking rod at the through hole.

[0038] After adopting the above method, the inner mold circular structure has high precision, which is conducive to improving the appearance quality of the manhole under the well cover plate and has a high aesthetic appeal; moreover, the overall assembly and disassembly operation only requires one operator, which greatly improves the construction efficiency; in addition, the shaping rings can be processed in small quantities, and the shaping rings and inner ring sheet metal can be reused, with a high turnover rate and reduced material consumption.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A quick-assembly and disassembly structure for the inner template of a precast manhole cover plate, characterized in that, It includes an outer mold and an inner mold, with a manhole cover plate formed between the outer mold and the inner mold, and a manhole is provided at the center of the manhole cover plate; the outer mold includes H-beams around the perimeter, and the inner mold includes an annular inner iron sheet, the interior of which is filled with sand and gravel.

2. The quick-assembly and disassembly structure of the inner template of the prefabricated manhole cover plate according to claim 1, characterized in that, The inner mold also includes multiple vertical reinforcing ribs arranged in an array. The multiple vertical reinforcing ribs are all fixed to the inner wall of the inner ring sheet metal, and the cross-section of the vertical reinforcing ribs is triangular.

3. The quick-assembly and disassembly structure for the inner template of the precast well cover plate according to claim 1 or 2, characterized in that, The inner ring of iron sheet is provided with an integral square steel bar at the end. One of the square steel bars has multiple grooves on the outside and a through hole through the multiple grooves on the top. The other square steel bar has multiple protrusions on the outside. The protrusions have vertically arranged through holes. The protrusions correspond one-to-one with the grooves. The inner diameter of the through hole is the same as that of the through hole.

4. The quick-assembly and disassembly structure of the inner template of the precast well cover plate according to claim 1, characterized in that, The inner ring of the sheet metal is also provided with a shaping ring on the outside.

5. The quick-assembly and disassembly structure of the inner template of the precast well cover plate according to claim 4, characterized in that, The shaping collar includes multiple arc-shaped ribs, and each pair of adjacent arc-shaped ribs is connected by an elastic cord. The elastic cord is provided with a tension spring on the outside, and the two ends of the tension spring are respectively fixed to the ends of the arc-shaped ribs.

6. The quick-assembly and disassembly structure of the inner template of the precast well cover plate according to claim 5, characterized in that, The arc-shaped rib includes multiple connecting columns. One end of each connecting column is provided with a hinge block, and the other end is provided with a socket that mates with the hinge block. The curvature of the arc-shaped rib is adaptively adjusted by the hinge block and the socket.

7. The quick-assembly and disassembly structure of the inner template of the precast well cover plate according to claim 6, characterized in that, Under normal circumstances, the inner diameter of the shaping ring is smaller than the inner diameter of the lower manhole.

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