Integrated round hole template

Abstract

The utility model provides an integrated round hole formwork which comprises a cylindrical formwork body, a lap joint part is arranged at one end of the cylindrical formwork body, a plurality of tensioning assemblies are arranged at the end in the cylindrical formwork body in the length direction, the integrated round hole formwork comprises a central connecting piece, a plurality of hinge plates capable of swinging are arranged on the central connecting piece in the circumferential direction, the ends of the hinge plates are hinged to the inner wall of the cylindrical formwork body, and the integrated round hole formwork is further provided with an ejector rod. Convex teeth are arranged on the outer wall of the pulling ejector rod, a through hole is formed in the center of the central connecting piece, convex tooth holes are formed in the outer edge of the through hole, the pulling ejector rod is used for penetrating through the through hole, the convex teeth are used for penetrating through the convex tooth holes, the pulling ejector rod is rotated and pulled, the convex teeth abut against the central connecting piece, and the hinge plate pulls the inner wall of the cylindrical formwork so that the cylindrical formwork can deform inwards to be demolded; the problem of pouring of large and medium-sized preformed holes in ship lock construction is solved.

Description

Technical Field

[0001] The utility model relates to the field of concrete formwork, in particular to an integrated circular hole formwork. Background Art

[0002] During ship lock construction, it's often necessary to reserve larger holes, such as for drainage channels, when pouring structural parts. Traditional large-hole formwork involves assembling multiple curved pieces one by one. This creates numerous joints, a significant amount of work, and makes it difficult to ensure strength. Concrete can easily leak out, and for medium-diameter holes, the confined interior space makes manual splicing on the inner side of the formwork difficult. Utility Model Content

[0003] The utility model provides an integrated circular hole template, which solves the problem of casting large and medium-sized reserved holes in ship lock construction.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an integrated circular hole template, including a cylindrical template, a lap portion is provided at one end of the cylindrical template, and multiple tensioning components are provided at the end along the length direction of the cylindrical template, including a central connecting piece, and the central connecting piece is provided with multiple swingable hinge plates along the circumference. The ends of the hinge plates are hinged to the inner wall of the cylindrical template, and are also provided with a ejector rod, and the outer wall of the ejector rod is provided with convex teeth. A through hole is provided in the center of the central connecting piece, and a convex tooth hole is provided on the outer edge of the through hole. The ejector rod is used to pass through the through hole, and the convex teeth are used to pass through the convex tooth hole. The ejector rod is rotated and pulled so that the convex teeth abut against the central connecting piece, and the hinge plate pulls the inner wall of the cylindrical template to cause the cylindrical template to deform inward and demold.

[0005] In a preferred solution, a hook block is provided on the inner wall of the free end of the cylindrical template near the outer side near the overlap portion, one end of the hook block is pressed against the inner wall of the free end of the cylindrical template near the inner side, and the hook block is provided with an avoidance groove.

[0006] In a preferred solution, a plurality of vertical ribs are provided on the inner wall of the cylindrical template along the circumference, a plurality of hinge seats are provided on the outer wall of the central connecting piece along the circumference, and both ends of the hinge plate are hinged to the vertical ribs and the hinge seats respectively.

[0007] In a preferred solution, a stop plate is provided on one side of the hinge seat to stop the hinge plate.

[0008] In the preferred solution, a screw portion is provided in the middle of the articulated seat, a rotatable screw sleeve is provided on the outer wall of the central connecting piece, the screw sleeve is threadedly sleeved on the screw portion of the articulated seat, a stop block portion is provided at the end of the articulated seat, an anti-rotation socket is provided on the side wall of the central connecting piece, the stop block portion is slidably inserted into the anti-rotation socket, and a locking nut is also provided, the locking nut is threadedly sleeved on the screw portion of the articulated seat, and one end of the locking nut rests against the screw sleeve.

[0009] In a preferred solution, a flange is provided on the outer wall of one end of the screw sleeve, a pressing cap is provided on the outer wall of the central connecting piece, the pressing cap is provided with a recessed groove, and the recessed groove of the pressing cap is reversely buckled with the flange.

[0010] The beneficial effects of the utility model are as follows: a splicing structure is adopted, the cylindrical formwork and the tensioning components are pre-made and spliced ​​together, and the formwork is controlled to be expanded and retracted by the ejector rod from one end, which facilitates the rapid forming, installation and demoulding of the formwork; a thin-walled cylindrical formwork with one end overlapping is adopted, which eliminates the tedious installation steps compared to the general multi-piece assembled formwork, saves construction time and reduces the construction difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the end portion of the present utility model.

[0013] Figure 2 It is a schematic diagram of the present utility model.

[0014] Figure 3 It is an internal side view of the present utility model.

[0015] Figure 4 It is a schematic diagram of the ejector rod of the present utility model.

[0016] Figure 5 This is a structural diagram of the central connecting piece of the present utility model.

[0017] Figure 6 This is an optimized structural diagram of the central connecting piece with articulated position adjustment.

[0018] Figure 7 It is a cross-sectional view of the articulated position adjustment structure.

[0019] In the figure: cylindrical formwork 1; overlapping part 101; vertical reinforcement 102; anti-rotation socket 103; central connecting part 2; through hole 201; convex tooth hole 202; hinge seat 203; stop plate 204; anti-rotation plug block part 205; hinge plate 3; ejector rod 4; pull ear 401; convex tooth 402; hook block 5; avoidance groove 501; tensioning assembly 6; screw sleeve 7; flange edge 701; pressure cap 8; locking nut 9. DETAILED DESCRIPTION

[0020] like Figure 1-7In the invention, an integrated circular hole template comprises a cylindrical template 1, a lap portion 101 is provided at one end of the cylindrical template 1, a plurality of tensioning components 6 are provided at the end along the length direction of the cylindrical template 1, comprising a central connecting member 2, the central connecting member 2 is provided with a plurality of swingable hinge plates 3 along the circumferential direction, the ends of the hinge plates 3 are hinged to the inner wall of the cylindrical template 1, and a ejector rod 4 is further provided, the outer wall of the ejector rod 4 is provided with a convex tooth 402, a through hole 201 is provided in the center of the central connecting member 2, a convex tooth hole 202 is provided on the outer edge of the through hole 201, the ejector rod 4 is used to pass through the through hole 201, the convex tooth 402 is used to pass through the convex tooth hole 202, the ejector rod 4 is rotated and pulled so that the convex tooth 402 abuts against the central connecting member 2, and the hinge plate 3 pulls the inner wall of the cylindrical template 1 to cause the cylindrical template 1 to deform inward and be demoulded.

[0021] The central connecting member 2 is a cylindrical structure with one end open, and a through hole 201 and a convex tooth hole 202 are provided at the closed end.

[0022] The cylindrical formwork 1 is a thin steel plate with a certain deformation recovery ability. A pull ear 401 is provided at one end of the ejector rod 4.

[0023] The protruding teeth 402 are provided at intervals along the length of the pull ear 401 , and the protruding teeth 402 can pass through the protruding tooth holes 202 .

[0024] During pouring construction, first insert the cylindrical formwork 1 into place, insert the ejector rod 4 into the through hole 201, until each convex tooth 402 is close to its respective central connecting piece 2, rotate the ejector rod 4 so that the convex tooth 402 and the convex tooth hole 202 are staggered at a certain circumferential angle, press the ejector rod 4 downward so that the convex teeth 402 squeeze the central connecting piece 2, and then the hinge plate 3 opens and supports the inner wall of the cylindrical formwork 1. At this time, concrete is poured on the outside of the cylindrical formwork 1 and waited for solidification.

[0025] After the concrete solidifies, the convex teeth 402 pass through the convex tooth holes 202, the ejector rod 4 rotates a certain angle, and then the ejector rod 4 is pulled. The convex teeth 402 will press against the central connecting piece 2, the hinge plate 3 closes and pulls the cylindrical formwork 1 inward, causing the cylindrical formwork 1 to deform inward and detach from the inner wall of the hole.

[0026] In the preferred solution, a hook block 5 is provided on the inner wall of the free end of the cylindrical template 1 near the outer side near the overlap portion 101 , one end of the hook block 5 is pressed against the inner wall of the free end of the cylindrical template 1 , and the hook block 5 is provided with an avoidance groove 501 .

[0027] If there is no hook block 5, the free end of 1 on the outside will lack the connection with 3, and will lack the pulling point during demoulding, making it difficult to deform and shrink inward.

[0028] After the cylindrical formwork 1 is rolled and formed, hook blocks 5 are welded at intervals along its length. When the hinge plate 3 pulls the cylindrical formwork 1 inward, the cylindrical formwork 1 deforms and moves the inner free end of the cylindrical formwork 1 deeper into the avoidance groove 501. Conversely, when the cylindrical formwork 1 needs to be expanded, the inner free end of the cylindrical formwork 1 is pulled outward from the deep avoidance groove 501.

[0029] In the preferred embodiment, a plurality of vertical ribs 102 are circumferentially provided on the inner wall of the cylindrical formwork 1, a plurality of hinge seats 203 are circumferentially provided on the outer wall of the central connecting member 2, and both ends of the hinge plate 3 are hinged to the vertical ribs 102 and the hinge seats 203 respectively.

[0030] The length direction of the vertical reinforcement 102 is consistent with the length direction of the cylindrical formwork 1, which can improve the overall strength of the cylindrical formwork 1 and prevent the length direction from being squeezed and deformed by the outer concrete.

[0031] In a preferred solution, a stop plate 204 is provided on one side of the hinge seat 203 to stop the hinge plate 3 .

[0032] When the tensioning assembly 6 is opened, the back side of the hinge plate 3 abuts against the stop plate 204 to form a stop, preventing the hinge plate 3 from swinging too far and causing the cylindrical template 1 to be stretched too much.

[0033] In the preferred embodiment, a screw portion is provided in the middle of the articulated seat 203, a rotatable screw sleeve 7 is provided on the outer wall of the central connecting member 2, the screw sleeve 7 is threadedly sleeved with the screw portion of the articulated seat 203, a stop-rotation plug portion 205 is provided at the end of the articulated seat 203, an anti-rotation socket 103 is provided on the side wall of the central connecting member 2, the stop-rotation plug portion 205 is slidably inserted into the anti-rotation socket 103, and a locking nut 9 is also provided, the locking nut 9 is threadedly sleeved with the screw portion of the articulated seat 203, and one end of the locking nut 9 abuts against the screw sleeve 7.

[0034] The anti-rotation socket 103 is a square hole, so the hinge seat 203 cannot rotate, but can be extended and retracted to adjust the position of the hinge with the hinge plate 3 and the degree to which the cylindrical template 1 is opened when the hinge plate 3 reaches the stop position.

[0035] In a preferred embodiment, a flange edge 701 is provided on the outer wall of one end of the screw sleeve 7 , a pressing cap 8 is provided on the outer wall of the central connecting piece 2 , and a recess is provided in the pressing cap 8 , and the recess of the pressing cap 8 is reversely buckled with the flange edge 701 .

[0036] The recessed groove of the pressing cap 8 is buckled against the flange edge 701 so that the screw sleeve 7 will not fall out, but will not hinder the rotation of the screw sleeve 7.

[0037] The outer wall of the screw sleeve 7 is provided with friction stripes to facilitate manual rotation.

[0038] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An integrated circular hole template, characterized by: The invention comprises a cylindrical template (1), wherein one end of the cylindrical template (1) is provided with an overlap portion (101), and the cylindrical template (1) is provided with a plurality of tensioning components (6) at the end thereof along the length direction, comprising a central connecting member (2), wherein the central connecting member (2) is provided with a plurality of swingable hinge plates (3) along the circumferential direction, wherein the ends of the hinge plates (3) are hingedly connected to the inner wall of the cylindrical template (1), and further provided with a ejector rod (4), wherein the outer wall of the ejector rod (4) is provided with a convex tooth (402), a through hole (201) is provided at the center of the central connecting member (2), and a convex tooth hole (202) is provided at the outer edge of the through hole (201), the ejector rod (4) is used to pass through the through hole (201), and the convex tooth (402) is used to pass through the convex tooth hole (202), the ejector rod (4) is rotated and pulled so that the convex tooth (402) abuts against the central connecting member (2), and the hinge plate (3) pulls the inner wall of the cylindrical template (1) so that the cylindrical template (1) is deformed inwardly and demoulded.

2. The one-piece circular hole template according to claim 1, characterized in that: A hook block (5) is provided on the inner wall of the free end of the cylindrical template (1) near the outer side, near the overlap portion (101). One end of the hook block (5) is pressed against the inner wall of the free end of the cylindrical template (1). The hook block (5) is provided with an avoidance groove (501).

3. The one-piece circular hole template according to claim 1 is characterized in that: The inner wall of the cylindrical template (1) is provided with a plurality of vertical ribs (102) along the circumference, the outer wall of the central connecting member (2) is provided with a plurality of hinge seats (203) along the circumference, and the two ends of the hinge plate (3) are hinged to the vertical ribs (102) and the hinge seats (203) respectively.

4. The one-piece circular hole template according to claim 3 is characterized in that: A stop plate (204) is provided on one side of the hinge seat (203) to stop the hinge plate (3).

5. The one-piece circular hole template according to claim 4 is characterized in that: The hinge seat (203) is provided with a screw portion in the middle, the outer wall of the central connecting member (2) is provided with a rotatable screw sleeve (7), the screw sleeve (7) is threadedly sleeved with the screw portion of the hinge seat (203), the end of the hinge seat (203) is provided with a rotation-stopping plug block portion (205), the side wall of the central connecting member (2) is provided with an anti-rotation socket (103), the rotation-stopping plug block portion (205) is slidably inserted into the anti-rotation socket (103), and a locking nut (9) is further provided, the locking nut (9) is threadedly sleeved with the screw portion of the hinge seat (203), and one end of the locking nut (9) abuts against the screw sleeve (7).

6. The one-piece circular hole template according to claim 5, characterized in that: A flange edge (701) is provided on the outer wall of one end of the screw sleeve (7), a pressing cap (8) is provided on the outer wall of the central connecting piece (2), and the pressing cap (8) is provided with a sinking groove, and the sinking groove of the pressing cap (8) is buckled with the flange edge (701).

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