Hollow slab core mold

Abstract

The invention provides a hollow slab core mold, and relates to the technical field of hollow slab manufacturing, the hollow slab core mold is used for being arranged in a hollow hole of a net cage component of a to-be-formed hollow slab, the hollow slab core mold comprises a shell, and a plurality of long-strip-shaped limiting holes are circumferentially distributed in the outer wall of the shell; at least two connecting rods are arranged in each limiting hole in a penetrating mode, and the at least two connecting rods located in the same limiting hole are arranged at intervals in the axial direction of the shell; the first shaft is rotationally arranged in the shell, a spiral track groove is distributed in the first shaft, and one end of the connecting rod is movably connected into the spiral track groove; the multiple core templates are circumferentially distributed on the outer side of the shell, the other ends of the at least two connecting rods in each limiting hole are rotationally connected with one core template, and the multiple core templates can be unfolded in the direction away from the shell or folded in the direction close to the shell when the first shaft rotates; the hollow slab core mold is convenient to operate, low in cost and capable of being repeatedly used.

Description

Technical Field

[0001] The invention belongs to the technical field of hollow slab manufacturing, and more specifically, relates to a hollow slab core mold. Background Art

[0002] The hollow slab core mold is a supporting mold for pouring concrete. It is mainly used in the manufacture of precast concrete hollow slabs. It is placed in the hollow hole of the steel mesh cage component of the hollow slab to be formed to support and form a hollow structure.

[0003] At present, the existing technologies of hollow slab core molds include inflatable air bag core molds, hydraulic jack structural core molds and foam core molds. Among them, the inflatable air bag core mold technology is now completely banned; the hydraulic jack structural core mold has a high mechanical cost for small prefabricated hollow slabs and has special requirements for the construction of prefabrication sites; the foam core mold cannot be recycled and its price is relatively high. Summary of the invention

[0004] The purpose of the present invention is to provide a hollow slab core mold in view of the shortcomings of the existing technology, so as to solve the problem that the existing hollow slab core mold mentioned in the above background technology is high in cost and cannot be recycled.

[0005] In order to achieve the above object, the present invention provides a hollow plate core mold, which is used to be arranged in the hollow hole of the mesh cage component of the hollow plate to be formed, and the hollow plate core mold comprises:

[0006] A shell, wherein the outer wall of the shell has a plurality of elongated limiting holes distributed in a circumferential manner;

[0007] A plurality of connecting rods, at least two of which are inserted into each limiting hole, and at least two of which are arranged in the same limiting hole at intervals along the axial direction of the housing;

[0008] A first shaft, the first shaft is rotatably disposed in the housing, a spiral track groove is distributed on the first shaft, and one end of the connecting rod is movably connected in the spiral track groove;

[0009] Multiple core templates are distributed in a circle on the outside of the shell, the other ends of at least two connecting rods in each limiting hole are rotatably connected to a core template, and the multiple core templates can be expanded in a direction away from the shell or retracted in a direction close to the shell when the first axis rotates.

[0010] Preferably, limiting track grooves are provided on both sides of the interior of the spiral track groove, the hollow plate core mold includes a plurality of balls, one end of each connecting rod is rollingly connected to one of the balls, and the ball is arranged in the spiral track groove and rolls between the two limiting track grooves.

[0011] Preferably, at least two first shaft bodies and at least two second shaft bodies are formed on the first shaft, the diameter of the second shaft body is larger than the diameter of the first shaft body, one second shaft body is arranged between every two first shaft bodies, a part of the core templates are first core templates, and another part of the core templates are second core templates, one end of the connecting rod on the first core template is movably set in the spiral track groove on the first shaft body, one end of the connecting rod on the second core template is movably set in the spiral track groove on the second shaft body, and one second core template is arranged between two adjacent first core templates.

[0012] Preferably, the hollow plate core mold further includes a plurality of limiting rods, and at least two connecting rods in each limiting hole are rotatably connected to one limiting rod.

[0013] Preferably, the hollow plate core mold further comprises:

[0014] A second shaft, one end of the housing is provided with an opening, the second shaft passes through the opening and is movably connected to the opening, and one end of the second shaft is connected to one end of the first shaft;

[0015] a locking mechanism, the locking mechanism being disposed at one end of the housing and capable of locking the second shaft;

[0016] An elastic mechanism is arranged in the shell, and two ends of the elastic mechanism are respectively connected to the other end of the shell and the other end of the first shaft.

[0017] Preferably, the locking mechanism comprises:

[0018] A chuck, the chuck is connected to the second shaft, one end of the housing is provided with a slot, when the plurality of core templates are unfolded, the chuck is embedded in the slot;

[0019] A plurality of limit plates are distributed in a circle around the card slot, the limit plates are slidably connected to one end of the shell, the limit plates can slide to a position covering the card slot, and can fit on one side of the chuck in the card slot.

[0020] Preferably, the elastic mechanism comprises:

[0021] A push plate, the edge of which is slidably connected to the inner side of the housing, and one side of the push plate is connected to the other end of the first shaft;

[0022] A first spring and a second spring, wherein the second spring is arranged inside the first spring, and the first spring and the second spring are arranged in the housing and between the push plate and the other end of the housing.

[0023] Preferably, a through hole is provided inside the first shaft, and one end of the second shaft is disposed in and connected to the through hole.

[0024] Preferably, the hollow plate core mold further comprises:

[0025] An ejector pin, one end of which is connected to the other end of the housing, and the other end of which is slidably and rotatably connected in the through hole;

[0026] A third spring is arranged in the through hole and between one end of the second shaft and the other end of the ejector pin.

[0027] Preferably, the hollow plate core mold further includes support rods, and a plurality of the support rods are circumferentially distributed on the circumference of the first shaft, and both ends of the support rods are respectively connected to the other end of the first shaft and one side of the push plate.

[0028] The present invention provides a hollow plate core mold, which has the beneficial effect that at least two connecting rods are inserted into each limiting hole of the hollow plate core mold, one end of the connecting rod is movably connected to the spiral track groove, and the other ends of the at least two connecting rods in each limiting hole are rotatably connected to a core mold plate. When the mesh cage component of the hollow plate is tied, the hollow plate core mold is set in the hollow hole of the mesh cage component, and the first shaft is operated to rotate clockwise, and one end of the connecting rod will move along the axis of the first shaft with the rotation of the spiral track groove. At this time, under the limiting action of the limiting hole, the connecting rod will move away from the shell body. The core molds are unfolded in the direction of the shell until all the core molds are unfolded. At this time, the core molds will cover the inner side of the hollow hole to prevent the concrete from entering the hollow hole when pouring the concrete, so as to realize the manufacture of the hollow slab. When the concrete pouring is completed and the final setting is reached, the first axis is operated to rotate counterclockwise, and the core molds will be retracted in the direction close to the shell. At this time, the core molds will be separated from the concrete surface. After the retraction of the core molds is completed, the hollow slab core mold can be taken out to facilitate the next hollow slab prefabrication cycle. The hollow slab core mold is easy to operate, low in cost and reusable.

[0029] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0031] Figure 1 A schematic diagram of the side view and cross-sectional structure of a hollow plate core mold according to an embodiment of the present invention is shown;

[0032] Figure 2 It shows a schematic diagram of the front view and cross-sectional structure of a hollow plate core mold according to one embodiment of the present invention;

[0033] Figure 3 A schematic structural diagram of a connecting rod and a ball of a hollow plate core mold according to an embodiment of the present invention is shown.

[0034] Description of reference numerals:

[0035] 1. Shell; 2. Limiting hole; 3. Connecting rod; 4. First axis; 5. Spiral track groove; 6. Core template; 61. Side template; 62. Corner template; 7. Ball; 8. Limiting rod; 9. Second axis; 10. Chuck; 11. Limiting plate; 12. Push plate; 13. First spring; 14. Second spring; 15. Ejector pin; 16. Support rod. DETAILED DESCRIPTION

[0036] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0037] like Figure 1 and Figure 2 As shown, the present invention provides a hollow plate core mold, which is used to be arranged in a hollow hole of a mesh cage component of a hollow plate to be formed, and the hollow plate core mold comprises:

[0038] The shell 1 has a plurality of elongated limiting holes 2 distributed circumferentially on the outer wall of the shell 1;

[0039] A plurality of connecting rods 3, at least two connecting rods 3 are inserted into each limiting hole 2, and at least two connecting rods 3 in the same limiting hole 2 are arranged at intervals along the axial direction of the housing 1;

[0040] A first shaft 4, which is rotatably disposed in the housing 1, and has a spiral track groove 5, one end of the connecting rod 3 being movably connected in the spiral track groove 5;

[0041] Multiple core templates 6 are distributed in a circle on the outside of the shell 1, and the other ends of at least two connecting rods 3 in each limiting hole 2 are rotatably connected to a core template 6. The multiple core templates 6 can be expanded in a direction away from the shell 1 or retracted in a direction close to the shell 1 when the first axis 4 rotates.

[0042] Specifically, in order to solve the problem that the existing hollow plate core molds are high in cost and cannot be recycled, the present invention provides a hollow plate core mold, wherein multiple core mold plates 6 of the hollow plate core mold can be expanded or folded like an umbrella, and at least two connecting rods 3 are inserted in each limiting hole 2 of the hollow plate core mold, and one end of the connecting rod 3 is movably connected to the spiral track groove 5, and the other ends of at least two connecting rods 3 in each limiting hole 2 are rotatably connected to a core mold plate 6. When the mesh cage component of the hollow plate is tied, the hollow plate core mold is set in the hollow hole of the mesh cage component, and the first shaft 4 is operated to rotate clockwise, and one end of the connecting rod 3 will move along the axis of the first shaft 4 with the rotation of the spiral track groove 5. At this time, the connecting rod 3 is blocked by one end inside the limiting hole 2, and the angle between the connecting rod 3 and the first shaft 4 is As the degree of shrinkage increases, the multiple core templates 6 will expand in the direction away from the shell body 1 until the multiple core templates 6 are fully expanded. At this time, the multiple core templates 6 will cover the inner side of the hollow hole, preventing concrete from entering the hollow hole when pouring concrete, so as to realize the manufacture of the hollow slab. When the concrete pouring is completed and the final setting is reached, the first shaft 4 is operated to rotate counterclockwise. At this time, the connecting rod 3 is blocked by the other end of the inner limit hole 2, and the angle between the connecting rod 3 and the first shaft 4 becomes smaller and smaller, and the multiple core templates 6 will be retracted in the direction close to the shell body 1. At this time, the multiple core templates 6 will be separated from the concrete surface. After the multiple core templates 6 are retracted, the hollow slab core mold can be taken out, which is convenient for the next hollow slab prefabrication cycle. The hollow slab core mold is easy to operate, low in cost and reusable.

[0043] like Figure 2 As shown, the number of core mold plates 6 of the hollow slab core mold is eight, of which four are side mold plates 61, and the other four are corner mold plates 62. They are distributed according to the construction orientation. The east, west, south, and north are all side mold plates 61, and the southeast, southwest, northeast, and northwest are all corner mold plates 62. The eight core mold plates 6 are all made of standardized steel mold plates, and they move independently without interfering with each other.

[0044] like Figure 3 As shown, preferably, limiting track grooves are provided on both sides of the interior of the spiral track groove 5, the hollow plate core mold includes a plurality of balls 7, one end of each connecting rod 3 is rollingly connected to a ball 7, and the ball 7 is arranged in the spiral track groove 5 and rolls between the two limiting track grooves.

[0045] Specifically, the two limiting track grooves are used to prevent the ball 7 from escaping from the spiral track groove 5 , and one end of the connecting rod 3 can move along the axis of the first shaft 4 through the ball 7 as the spiral track groove 5 rotates.

[0046] Preferably, at least two first shaft bodies and at least two second shaft bodies are formed on the first shaft 4, the diameter of the second shaft body is larger than the diameter of the first shaft body, a second shaft body is arranged between every two first shaft bodies, a part of the core templates 6 of the multiple core templates 6 are the first core templates, and another part of the core templates 6 are the second core templates, one end of the connecting rod 3 on the first core template is movably set in the spiral track groove 5 on the first shaft body, one end of the connecting rod 3 on the second core template is movably set in the spiral track groove 5 on the second shaft body, and a second core template is arranged between two adjacent first core templates.

[0047] Specifically, the first core template is the side template 61, and the second core template is the corner template 62. In order to realize the differential movement working condition of fast retraction and release of the corner template 62 and slow retraction and release of the side template 61, the first shaft 4 is designed as a first shaft body and a second shaft body with different diameters, and one end of the connecting rod 3 on the side template is movably set in the spiral track groove 5 on the first shaft body with a relatively small diameter, and one end of the connecting rod 3 on the corner template is movably set in the spiral track groove 5 on the second shaft body with a relatively large diameter.

[0048] When the first axis 4 rotates, since the circumference of the second axis is longer than that of the first axis, when they rotate a certain angle at the same time, one end of the connecting rod 3 on the corner template 62 moves a longer distance than one end of the connecting rod 3 on the side template 61, thereby realizing the differential movement condition of fast retraction and release of the corner template 62 and slow retraction and release of the side template 61, which can avoid restrictions between the corneal plate 62 and the side template 61 when they are retracted and released.

[0049] Preferably, the hollow plate core mold further includes a plurality of limiting rods 8 , and at least two connecting rods 3 in each limiting hole 2 are rotatably connected to a limiting rod 8 .

[0050] Specifically, the number of connecting rods 3 in each limiting hole 2 is three. To achieve the stability of synchronous retraction and extension of the three connecting rods 3 in each limiting hole 2, a limiting rod 8 is rotatably connected to the three connecting rods 3 in each limiting hole 2.

[0051] Preferably, the hollow plate core mold further comprises:

[0052] A second shaft 9, one end of the housing 1 is provided with an opening, the second shaft 9 passes through the opening and is movably connected to the opening, and one end of the second shaft 9 is connected to one end of the first shaft 4;

[0053] A locking mechanism, which is disposed at one end of the housing 1 and is capable of locking the second shaft 9;

[0054] The elastic mechanism is arranged in the housing 1 , and two ends of the elastic mechanism are respectively connected to the other end of the housing 1 and the other end of the first shaft 4 .

[0055] Specifically, when the mesh cage components of the hollow slab are tied, the shell 1 is set in the hollow hole of the mesh cage component, the first shaft 4 is operated to rotate clockwise, and the second shaft 9 is pushed toward the inside of the shell 1. At this time, the multiple core templates 6 are expanded in the direction away from the shell 1 under the action of the first shaft 4, and the elastic mechanism will be compressed until the multiple core templates 6 are fully expanded. The movement of the second shaft 9 can be locked by the locking mechanism to prevent the second shaft 9 from being pushed out of the shell 1. At this time, the multiple core templates 6 will cover the inner side of the hollow hole, and the concrete will be prevented from entering the hollow hole when pouring concrete, so as to realize the production of the hollow slab. When the concrete pouring is completed and the final setting is reached, the elastic mechanism is released. Due to the elastic effect of the elastic mechanism, the second shaft 9 will be pushed out of the shell 1 by an end distance, and the connecting rod 3 will hit the limit hole at this time. The contraction of the connecting rod 3 will drive the core template 6 to contract instantly. The instantaneous contraction force will make the core template 6 quickly separate from the concrete surface. At this time, the first shaft 4 can be operated to rotate counterclockwise to continue to contract the core template 6. After the contraction of multiple core templates 6 is completed, the hollow slab core mold can be taken out, which is convenient for the next hollow slab prefabrication cycle. The hollow slab core mold is easy to operate, low in cost and reusable.

[0056] Preferably, the locking mechanism comprises:

[0057] A chuck 10, the chuck 10 is connected to the second shaft 9, and a slot is provided at one end of the housing 1, and when the plurality of core templates 6 are unfolded, the chuck 10 is embedded in the slot;

[0058] A plurality of limit plates 11 are distributed in a circle around the card slot. The limit plates 11 are slidably connected to one end of the shell 1. The limit plates 11 can slide to a position covering the card slot and can fit on one side of the chuck 10 in the card slot.

[0059] Specifically, when the multiple core templates are fully unfolded, the chuck 10 will be completely embedded in the slot. At this time, the multiple limiting plates 11 can be slid to press the chuck 10 to prevent the chuck 10 from popping out of the slot.

[0060] Preferably, the elastic mechanism comprises:

[0061] A push plate 12, the edge of which is slidably connected to the inner side of the housing 1, and one side of the push plate 12 is connected to the other end of the first shaft 4;

[0062] The first spring 13 and the second spring 14 , wherein the second spring 14 is disposed inside the first spring 13 , and the first spring 14 and the second spring 13 are disposed in the housing 1 and between the push plate 12 and the other end of the housing 1 .

[0063] Specifically, the first spring 13 is an annular high-strength spring, and the second spring 14 is a first-axis high-strength spring, which provides a certain strength of elastic force, facilitates the core formwork 6 to be more easily separated from the concrete surface, and improves the separation efficiency.

[0064] Preferably, a through hole is provided inside the first shaft 4, and one end of the second shaft 8 is disposed in and connected to the through hole.

[0065] Specifically, the through hole is used to achieve the connection between the first shaft 4 and the second shaft 8 .

[0066] Preferably, the hollow plate core mold further comprises:

[0067] An ejector pin 15, one end of which is connected to the other end of the housing 1, and the other end of the ejector pin 15 is slidably and rotatably connected in the through hole;

[0068] The third spring 17 is disposed in the through hole and between one end of the second shaft 9 and the other end of the ejector pin 15 .

[0069] Specifically, the third spring 17 is a second-axis high-strength spring, which is used to generate a mutually repulsive force with the ejector pin 15, further improving the efficiency of the core formwork 6 being separated from the concrete surface.

[0070] Preferably, the hollow plate core mold further includes support rods 16 , and a plurality of support rods 16 are circumferentially distributed around the first shaft 4 , and both ends of the support rods 16 are respectively connected to the other end of the first shaft 4 and one side of the push plate 12 .

[0071] Specifically, the support rod 16 is used to connect the push plate 12 and the first shaft 4 together.

[0072] In summary, when the hollow plate core mold of the present invention is implemented, after the steel mesh cage component of the hollow plate is tied, the hollow plate core mold is set in the hollow hole of the mesh cage component. Generally, two hollow plate core molds are relatively set in the hollow hole and operated against each other at the same time. When installing the core mold plate 6, the second shaft 9 is operated to rotate clockwise, and the second shaft 9 is pushed in the direction of the shell 1. The ball 7 on one end of the connecting rod 3 will move along the axis of the first shaft 4 with the rotation of the spiral track groove 5 until the eight core mold plates 6 are fully unfolded. At this time, the ejector pin 15 and the third spring 17 generate a mutually repulsive force, and the first spring 13 and the second spring 14 generate an interaction force with the first shaft 4 as a whole. After the chuck on the second shaft 9 is completely embedded in the slot, the limit plate 11 is manually moved so that the limit plate 11 completely presses the chuck 10. At this time, the connecting rod 3 supports the core mold plate 6, and each spring interacts completely with the first shaft 4 and the second shaft 9 to achieve the overall stability of the hollow plate core mold;

[0073] After the concrete pouring of the hollow slab is completed and reaches final setting, the limit plate 11 is manually released. At this time, due to the interaction force between each spring and the first shaft 4 and the second shaft 9, the core mold plate 6 will automatically detach from the concrete surface. By manually operating the first shaft 4 to rotate counterclockwise, the eight core mold plates 6 are simultaneously contracted. After all or part of the core mold plates 6 have completed contraction, the hollow slab core mold can be pulled out to facilitate the next hollow slab prefabrication cycle.

[0074] The hollow slab core mold is a purely mechanical connection core mold, which does not require electricity or rails, greatly reducing the cost of construction machinery.

[0075] The hollow plate core mold can be reused, and has a high level of energy saving and environmental protection;

[0076] The hollow slab core mold is easy to operate, shortens the construction period and improves the construction efficiency.

[0077] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A hollow plate core mold, used to be arranged in the hollow hole of a mesh cage component of a hollow plate to be formed, characterized in that: The hollow plate core mold includes: A shell, wherein the outer wall of the shell has a plurality of elongated limiting holes distributed in a circumferential manner; A plurality of connecting rods, at least two of which are inserted into each limiting hole, and at least two of which are arranged in the same limiting hole at intervals along the axial direction of the housing; A first shaft, the first shaft is rotatably disposed in the housing, a spiral track groove is distributed on the first shaft, and one end of the connecting rod is movably connected in the spiral track groove; Multiple core templates are distributed in a circle on the outside of the shell, the other ends of at least two connecting rods in each limiting hole are rotatably connected to a core template, and the multiple core templates can be expanded in a direction away from the shell or retracted in a direction close to the shell when the first axis rotates.

2. A hollow plate core mold according to claim 1, characterized in that: Limiting track grooves are provided on both sides of the interior of the spiral track groove. The hollow plate core mold includes a plurality of balls. One end of each connecting rod is rollingly connected to a ball. The ball is arranged in the spiral track groove and rolls between the two limiting track grooves.

3. A hollow plate core mold according to claim 1, characterized in that: At least two first shaft bodies and at least two second shaft bodies are formed on the first shaft, the diameter of the second shaft body is larger than the diameter of the first shaft body, one second shaft body is arranged between every two first shaft bodies, a part of the core templates are first core templates, and another part of the core templates are second core templates, one end of the connecting rod on the first core template is movably set in the spiral track groove on the first shaft body, one end of the connecting rod on the second core template is movably set in the spiral track groove on the second shaft body, and one second core template is arranged between two adjacent first core templates.

4. A hollow plate core mold according to claim 1, characterized in that: The hollow plate core mold also includes a plurality of limiting rods, and at least two connecting rods in each limiting hole are rotatably connected to one limiting rod.

5. A hollow plate core mold according to claim 1, characterized in that: The hollow plate core mold also includes: A second shaft, one end of the housing is provided with an opening, the second shaft passes through the opening and is movably connected to the opening, and one end of the second shaft is connected to one end of the first shaft; a locking mechanism, the locking mechanism being disposed at one end of the housing and capable of locking the second shaft; An elastic mechanism is arranged in the shell, and two ends of the elastic mechanism are respectively connected to the other end of the shell and the other end of the first shaft.

6. A hollow plate core mold according to claim 5, characterized in that: The locking mechanism comprises: A chuck, the chuck is connected to the second shaft, one end of the housing is provided with a slot, when the plurality of core templates are unfolded, the chuck is embedded in the slot; A plurality of limit plates are distributed in a circle around the card slot, the limit plates are slidably connected to one end of the shell, the limit plates can slide to a position covering the card slot, and can fit on one side of the chuck in the card slot.

7. A hollow plate core mold according to claim 5, characterized in that: The elastic mechanism comprises: A push plate, the edge of which is slidably connected to the inner side of the housing, and one side of the push plate is connected to the other end of the first shaft; A first spring and a second spring, wherein the second spring is arranged inside the first spring, and the first spring and the second spring are arranged in the housing and between the push plate and the other end of the housing.

8. A hollow plate core mold according to claim 5, characterized in that: A through hole is provided inside the first shaft, and one end of the second shaft is disposed in and connected to the through hole.

9. A hollow plate core mold according to claim 8, characterized in that: The hollow plate core mold also includes: An ejector pin, one end of which is connected to the other end of the housing, and the other end of which is slidably and rotatably connected in the through hole; A third spring is arranged in the through hole and between one end of the second shaft and the other end of the ejector pin.

10. A hollow plate core mold according to claim 7, characterized in that: The hollow plate core mold also includes support rods, and a plurality of the support rods are distributed in a circle around the first shaft, and both ends of the support rods are respectively connected to the other end of the first shaft and one side of the push plate.

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