Internal mold structure for rectangular cast-in-place hoistway

Abstract

The utility model relates to the technical field of constructional engineering, in particular to an internal mold structure for a rectangular cast-in-place hoistway. Comprising four angle molds distributed at intervals, and the cross section of each angle mold is an isosceles right triangle; each adjusting mold is located between every two adjacent angle molds to be spliced to form a rectangular frame, and the two ends of each adjusting mold are slidably connected with the corresponding angle mold; the four adjusting rods are vertically arranged on the inner sides of the corresponding angle molds respectively, two height-adjustable adjusting blocks are arranged on each adjusting rod at intervals, two connecting rods are hinged to each adjusting block, and the connecting rods are hinged to the corresponding adjusting molds respectively. The device has the beneficial effects that by arranging the angle mold and the adjusting mold, the angle mold and the adjusting mold are spliced to form the rectangular frame, the side face of the adjusting mold and the inclined face of the angle mold can slide relatively, the adjusting mold gets close to each other, and then the size of the rectangular frame becomes small; and hoisting equipment can more conveniently hoist the internal mold structure out of the hoistway and move the internal mold structure to the next construction position.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and specifically refers to an inner mold structure for rectangular cast-in-place shafts. Background Technology

[0002] In construction, buildings often feature rectangular shafts made of cast-in-place concrete, serving as smoke exhaust ducts, garbage chutes, and ventilation ducts. These shafts have narrow internal cavities, making it impossible for personnel to perform operations within them. A common construction method involves placing precast rectangular wooden boxes as inner formwork within the shaft. However, after the concrete is poured, the inner formwork deforms under the pressure of the concrete, making it difficult to remove directly. Furthermore, the narrow internal cavity prevents personnel from accessing and dismantling it, thus leaving it inside the shaft. This affects the shaft's future functionality, and the non-reusability of the inner formwork leads to material waste and increased costs.

[0003] Therefore, this utility model proposes an inner mold structure for rectangular cast-in-place shafts. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide an inner mold structure for rectangular cast-in-place shafts, solving the problem that the existing inner mold of the shaft is difficult to extract directly after being deformed by concrete extrusion, and personnel cannot directly enter to dismantle it.

[0005] The technical solution to achieve the above objectives is:

[0006] This utility model provides an inner mold structure for a rectangular cast-in-place manhole, comprising: four spaced-apart corner molds with cross-sections of isosceles right triangles; four adjusting molds, each adjusting mold located between two adjacent corner molds to form a rectangular frame, the two ends of the adjusting mold being slidably connected to the corresponding corner mold; and four adjusting rods, each vertically disposed on the inner side of the corresponding corner mold, each adjusting rod having two height-adjustable adjusting blocks spaced apart, and two connecting rods hinged to the adjusting blocks, the connecting rods being hinged to the corresponding adjusting molds respectively.

[0007] Furthermore, each adjustment mold includes: two sliding molds with a right-angled trapezoidal cross-section, and the inclined surface of the sliding mold is connected to the inclined surface of the corresponding corner mold so that the outer surface of the sliding mold and the outer surface of the corner mold are on the same side; at least one connecting mold is located between the two sliding molds and its two ends are fixedly connected to the corresponding sliding mold.

[0008] Furthermore, the connecting mold has a first stiffening plate at both ends, and the sliding mold has a second stiffening plate at the end connected to the connecting mold. The first stiffening plate and the second stiffening plate are in close contact. The first stiffening plate and the second stiffening plate are provided with screw holes spaced apart, and fixing bolts are provided in the screw holes.

[0009] Furthermore, the length L1 of the angled mold inclined surface and the length L2 of the adjusting mold inclined surface satisfy the following relationship: 2×L2<L1.

[0010] Furthermore, the adjusting rod is rotatably connected to the angle mold, and the adjusting block is a nut that is sleeved on the adjusting rod. The corresponding area of ​​the adjusting rod has an external thread that engages with the nut.

[0011] Furthermore, it also includes: a T-shaped support plate, the first end of which is fixed to the inner side of the corner mold, and there are at least two support plates that are spaced apart; a U-shaped clamping plate, which is fixed to the second end of the support plate to form a limiting hole, and the adjusting rod passes through the limiting hole.

[0012] Furthermore, the second end of the support plate extends to both sides to form a first extension end, and the two ends of the clamping plate extend to both sides to form a second extension end. The first extension end and the second extension end are in close contact. Elliptical holes are provided on the first extension end and the second extension end, and connecting bolts are provided in the elliptical holes. The connecting bolts are fixed on the corresponding adjustment mold.

[0013] Furthermore, there are two connecting bolts in each elliptical hole.

[0014] Furthermore, both the corner mold and the adjusting mold are made of steel.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) By setting up corner molds and adjustment molds, corner molds and adjustment molds are spliced ​​together to form a rectangular frame, and the side of the adjustment mold and the inclined surface of the corner mold can slide relative to each other, so that the adjustment molds are close to each other, thereby reducing the size of the rectangular frame, making it easier for the hoisting equipment to lift the inner mold structure out of the shaft and move it to the next construction position.

[0017] (2) By setting up adjustable blocks and connecting rods that can move up or down, the adjustable blocks can be moved up or down, thereby driving the adjustable molds to move closer to each other through the connecting rods, so as to reduce the size of the rectangular frame. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the inner mold structure for rectangular cast-in-place shafts according to this utility model.

[0019] Figure 2 This is a cross-sectional view of the inner mold structure of the present invention used for rectangular cast-in-place shafts.

[0020] Figure 3 This is a top view of the inner mold structure of the present invention used for rectangular cast-in-place shafts.

[0021] Legend: 1. Angle mold; 2. Connecting mold; 3. Sliding mold; 4. Adjusting rod; 5. External thread; 6. Adjusting block; 7. Connecting rod; 8. Support plate; 9. Clamping plate; 10. Screw hole; 11. Fixing bolt; 12. Connecting bolt. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] See Figure 1 This utility model provides an inner formwork structure for rectangular cast-in-place shafts, solving the problem that existing shaft inner formwork is difficult to extract directly after being deformed by concrete extrusion, and personnel cannot directly enter for dismantling. (1) By setting corner molds and adjusting molds, the corner molds and adjusting molds are spliced ​​together to form a rectangular frame, and the side of the adjusting mold and the inclined surface of the corner mold can slide relative to each other, so that the adjusting molds are closer to each other, thereby reducing the size of the rectangular frame, making it easier for hoisting equipment to lift the inner formwork structure out of the shaft and move it to the next construction position. (2) By setting up adjustable blocks and connecting rods that move up and down, the adjustable blocks can move up or down, thereby driving the adjusting molds to move closer to each other through the connecting rods, so as to reduce the size of the rectangular frame.

[0024] The following description, in conjunction with the accompanying drawings, illustrates an internal mold structure for a rectangular cast-in-place shaft according to this utility model.

[0025] See Figure 1 This diagram shows the overall structure of the inner mold structure for a rectangular cast-in-place shaft according to this invention. (See attached image.) Figure 2 This image shows a cross-sectional view of the internal mold structure of this utility model used for rectangular cast-in-place shafts. The following is in conjunction with... Figure 1 and Figure 2 This invention describes an internal mold structure for a rectangular cast-in-place shaft.

[0026] like Figure 1 and Figure 2As shown, this utility model discloses an inner mold structure for a rectangular cast-in-place manhole, comprising: four spaced-apart corner molds 1, each with an isosceles right-angled triangular cross-section; four adjusting molds, each located between two adjacent corner molds 1 to form a rectangular frame, with both ends of the adjusting mold slidably connected to the corresponding corner mold 1; and four adjusting rods 4, vertically positioned on the inner side of the corresponding corner mold 1, each adjusting rod 4 having two height-adjustable adjusting blocks 6 spaced apart, and two connecting rods 7 hinged to each adjusting block 6, which are respectively hinged to the corresponding adjusting mold. By setting the corner molds 1 and adjusting molds to form a rectangular frame, the inner side of the rectangular manhole can be supported. After the shaft is poured, adjusting rods 4, adjusting blocks 6, and connecting rods 7 are set up to move adjusting blocks 6 up or down. This allows the connecting rods 7 to pull one side of the adjusting mold onto the corner mold 1, bringing the four adjusting molds closer together. Since the inclined surfaces of the adjusting molds and the corner mold 1 are aligned, the overall size of the rectangular frame is reduced, meaning the adjusting molds collapse inwards. This causes the corner mold 1 and the adjusting molds to detach from the inner wall of the shaft, making it easier to use hoisting equipment to lift the inner mold structure out of the shaft and to the next construction location, thus enabling the reuse of the inner mold structure.

[0027] In one specific embodiment, each adjusting mold includes: two sliding molds 3 with a right-angled trapezoidal cross-section, wherein the inclined surface of the sliding mold 3 is aligned with the inclined surface of the corresponding corner mold 1, so that the outer surface of the sliding mold 3 and the outer surface of the corner mold 1 are on the same side; and at least one connecting mold 2, located between the two sliding molds 3, with both ends fixedly connected to the corresponding sliding mold 3. By setting the adjusting mold as a combination of sliding molds 3 and connecting molds 2, the number of connecting molds 2 can be appropriately adjusted according to the size of the shaft, thereby changing the size of the rectangular frame formed by splicing, so as to adapt it to the size of the shaft and support the inner side of the shaft.

[0028] In one specific embodiment, the connecting mold 2 has first stiffening plates at both ends, and the sliding mold 3 has a second stiffening plate at the end connected to the connecting mold 2. The first stiffening plate and the second stiffening plate are in close contact. Screw holes 10 are spaced apart on the first stiffening plate and the second stiffening plate, and fixing bolts 11 are installed in the screw holes 10. By setting the first stiffening plate and the second stiffening plate, the structure of the connecting mold 2 and the sliding mold 3 is strengthened. Simultaneously, by opening the screw holes 10 and installing fixing bolts 11 in the screw holes 10, a fixed connection between the connecting mold 2 and the sliding mold 3 is achieved.

[0029] In one specific embodiment, the length L1 of the inclined surface of the corner mold 1 and the length L2 of the inclined surface of the adjusting mold satisfy the following relationship: 2×L2<L1. By making the length L1 of the inclined surface of the corner mold 1 and the length L2 of the inclined surface of the adjusting mold satisfy this relationship, the inclined surface of the adjusting mold has enough space to slide on the inclined surface of the corner mold 1, thereby realizing the overall collapse of the inner mold structure.

[0030] In a preferred embodiment, the adjusting rod 4 is rotatably connected to the angle mold 1, and the adjusting block 6 is a nut fitted onto the adjusting rod 4. The corresponding area of ​​the adjusting rod 4 has an external thread 5 that engages with the nut. By setting the adjusting block 6 as a nut and providing the external thread 5 on the adjusting rod 4, rotating the adjusting rod 4 allows the nut to move upwards or downwards, thereby pulling the two corresponding adjusting molds closer together via the hinged connecting rod 7.

[0031] The upper end of the adjusting rod 4 is hexagonal. A wrench of the corresponding size is engaged with the end of the hexagon to make it easier to rotate the adjusting rod 4.

[0032] In one specific embodiment, the system further includes: a T-shaped support plate 8, the first end of which is fixed to the inner side of the corner mold 1; at least two support plates 8 are provided and spaced apart; and a U-shaped clamping plate 9, which is fixed to the second end of the support plate 8 to form a limiting hole, through which the adjusting rod 4 passes. By providing the T-shaped support plate 8 and the U-shaped clamping plate 9 connected to the corner mold 1, the clamping plate 9 is fixed to the support plate 8, thereby allowing the adjusting rod 4 to pass between the clamping plate 9 and the support plate 8, thus limiting the movement of the adjusting rod 4.

[0033] In one specific embodiment, the second end of the support plate 8 extends to both sides to form a first extension end, and the two ends of the clamping plate 9 extend to both sides to form a second extension end. The first extension end and the second extension end are in close contact. Elliptical holes are provided on the first extension end and the second extension end, and connecting bolts 12 are provided in the elliptical holes. The connecting bolts 12 are fixed to the corresponding adjusting molds. Through this embodiment, when the connecting rod 7 pulls the adjusting molds closer to each other, one end of the connecting bolt 12 slides in the elliptical hole, thereby fixing the adjusting molds while not affecting their movement.

[0034] In one specific embodiment, there are two connecting bolts 12 in each elliptical hole.

[0035] In one specific embodiment, both the corner mold 1 and the adjusting mold are made of steel. By making the corner mold 1 and the adjusting mold of steel, the structural strength of the inner mold structure is greatly increased.

[0036] In one specific embodiment, both the corner mold 1 and the adjusting mold are provided with lifting holes.

[0037] The following is a detailed description of the use of the internal mold structure for rectangular cast-in-place shafts according to this utility model.

[0038] First, assemble the inner mold structure. Then, rotate the adjusting rod 4 so that the adjusting rod 4, through the adjusting block 6 and the connecting rod 7, drives the adjusting mold to move closer to each other, thereby reducing the overall size of the inner mold structure.

[0039] The inner mold structure is hoisted to the construction position using hoisting equipment. Then, the adjusting rod 4 is rotated, causing the adjusting rod 4 to drive the adjusting mold back to its original position via the adjusting block 6 and the connecting rod 7, so that the outer surface of the adjusting mold and the outer surface of the corner mold 1 are on the same plane. Then, the well shaft is poured.

[0040] After the well shaft is poured and reaches the design strength, the adjusting rod 4 is rotated to bring the adjusting molds closer together, so that the size of the inner mold structure is reduced. Then, the hoisting equipment lifts the inner mold structure out and moves it to the next construction position.

[0041] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. An inner mold structure for a rectangular cast-in-place shaft, characterized in that: include: Four spaced-apart corner molds (1) have cross-sections that are isosceles right triangles; Four adjustment molds, each located between two adjacent corner molds (1) to form a rectangular frame, wherein the two ends of each adjustment mold are slidably connected to the corresponding corner mold (1); and Four adjusting rods (4) are vertically arranged on the inner side of the corresponding corner mold (1). Each adjusting rod (4) is provided with two adjustable blocks (6) with adjustable height at intervals. Two connecting rods (7) are hinged on the adjusting blocks (6). The connecting rods (7) are respectively hinged to the corresponding adjusting mold.

2. The inner mold structure for a rectangular cast-in-place shaft according to claim 1, characterized in that: Each adjustment module includes: Two sliding molds (3) have a cross-section of a right trapezoid, and the inclined surface of the sliding mold (3) is connected to the inclined surface of the corresponding corner mold (1) so that the outer surface of the sliding mold (3) and the outer surface of the corner mold (1) are on the same side; At least one connecting mold (2) is located between two sliding molds (3), and its two ends are fixedly connected to the corresponding sliding molds (3).

3. The inner mold structure for a rectangular cast-in-place shaft according to claim 2, characterized in that: The connecting mold (2) is provided with first stiffening plates at both ends, and the sliding mold (3) is provided with a second stiffening plate at one end connected to the connecting mold (2), with the first stiffening plate and the second stiffening plate in close contact; The first stiffening plate and the second stiffening plate are provided with screw holes (10) spaced apart, and the screw holes (10) are provided with fixing bolts (11).

4. The inner mold structure for a rectangular cast-in-place shaft according to claim 1, characterized in that: The length L1 of the inclined surface of the corner mold (1) and the length L2 of the inclined surface of the adjustment mold satisfy the following relationship: 2×L2<L1.

5. The inner mold structure for a rectangular cast-in-place shaft according to claim 1, characterized in that: The adjusting rod (4) is rotatably connected to the angle mold (1), the adjusting block (6) is a nut, which is sleeved on the adjusting rod (4), and the corresponding area of ​​the adjusting rod (4) is provided with an external thread (5) that engages with the nut.

6. The inner mold structure for a rectangular cast-in-place shaft according to claim 1, characterized in that: Also includes: A T-shaped support plate (8) is provided, the first end of which is fixed to the inner side of the corner mold (1), and there are at least two support plates (8) that are spaced apart. A U-shaped clamp (9) is fixed to the second end of the support plate (8) to form a limiting hole, and the adjusting rod (4) passes through the limiting hole.

7. The inner mold structure for a rectangular cast-in-place shaft according to claim 6, characterized in that: The second end of the support plate (8) extends to both sides to form a first extension end, and the two ends of the clamping plate (9) extend to both sides to form a second extension end, with the first extension end and the second extension end in close contact. Elliptical holes are provided on the first extension end and the second extension end, and connecting bolts (12) are provided in the elliptical holes. The connecting bolts (12) are fixed on the corresponding adjustment molds.

8. The inner mold structure for a rectangular cast-in-place shaft according to claim 7, characterized in that: There are two connecting bolts (12) in each elliptical hole.

9. The inner mold structure for a rectangular cast-in-place shaft according to claim 1, characterized in that: Both the corner mold (1) and the adjustment mold are made of steel.

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