Split type prefabricated box girder vent hole forming die

Abstract

The utility model discloses a split type prefabricated box girder vent hole forming die, including inner tube, outer tube and a plurality of connecting sleeve, the inner tube, the outer tube and the connecting sleeve coaxial setting and the connecting sleeve fixed setting between the inner tube with the outer tube, the connecting sleeve with the inner tube, the outer tube between and adjacent connecting sleeve between there is butt joint structure, the inner tube, the outer tube and the connecting sleeve between fixed connection through fixed assembly, through the vent hole template setting into the inner tube, outer tube, connecting sleeve these split body structure, make when dismantling, can dismantle in proper order, the damage that causes to the vent hole inner wall is smaller, not easy to cause the damage of the plug board.

Description

Technical Field

[0001] This application relates to the field of box girder manufacturing technology, and more specifically, to a split-type precast box girder ventilation hole forming mold. Background Technology

[0002] Box girders are a type of bridge, typically constructed by pouring concrete. The formwork for a box girder consists of an inner mold and an outer mold. The inner mold is located inside the box girder and needs to be removed after the poured concrete has cooled.

[0003] In existing technologies, due to the confined internal space of box girders and the long time required for internal formwork removal, ventilation holes are typically pre-installed at the end plates of the box girders during casting to prevent breathing difficulties for workers during dismantling. Currently, the ventilation hole mold is usually a single piece of steel pipe. After the box girder is cast and the concrete at the end plate has solidified, the steel pipe is removed from the end plate, creating a ventilation hole. However, removing the steel pipe is very difficult because its outer wall is tightly bonded to the concrete. It usually requires striking the pipe axially with a heavy hammer to detach it from the concrete, but this method can cause concrete breakage, resulting in an unsightly end plate and even affecting its support strength.

[0004] Therefore, it is necessary for the inventors to design a new split-type precast box girder ventilation hole forming mold to overcome the above problems. Summary of the Invention

[0005] The main objective of this application is to provide a split-type precast box girder ventilation hole forming mold to solve the problem that the end plate is easily damaged when the ventilation hole forming template is removed in related technologies.

[0006] To achieve the above objectives, this application provides a split-type precast box girder ventilation hole forming mold, including an inner cylinder, an outer cylinder, and a plurality of connecting sleeves. The inner cylinder, the outer cylinder, and the connecting sleeves are coaxially arranged, and the connecting sleeves are fixedly arranged between the inner cylinder and the outer cylinder. The connecting sleeves have a docking structure with the inner cylinder, the outer cylinder, and adjacent connecting sleeves. The inner cylinder, the outer cylinder, and the connecting sleeves are fixedly connected by a fixing component.

[0007] Optionally, the docking structure includes a mutually compatible insertion ring and an annular groove. The insertion ring is fixedly disposed at the inner end of the outer cylinder and the connecting sleeve, and the annular groove is formed at the outer end of the connecting sleeve and the inner cylinder.

[0008] Optionally, the fixing component includes a connecting plate and a screw. The connecting plate is fixedly disposed inside the inner cylinder, the connecting sleeve, and the outer cylinder. A threaded sleeve is fixedly disposed at the outer end of the connecting plate on the inner cylinder. Insertion holes are provided on the connecting sleeve and the connecting plate on the outer cylinder. The screw passes through all the insertion holes and is threadedly connected to the threaded sleeve.

[0009] Optionally, each of the connecting plates is fixedly connected to the inner wall of its corresponding inner cylinder, connecting sleeve, and outer cylinder by a plurality of connecting rods.

[0010] Optionally, it also includes a rotary striking device for rotary striking all the connecting rods on the same connecting plate.

[0011] Optionally, the rotating striking device includes a rotating plate, the outer end of which is fixedly connected to a rotating shaft connected to an external driving device, and the inner end of which is fixedly connected to a plurality of insert rods, the insert rods being inserted between two adjacent connecting rods.

[0012] Optionally, the connecting rod and the insertion rod are arranged in a circular array.

[0013] Optionally, the outer cylinder, the outer cylinder, and the connecting sleeve have the same outer diameter.

[0014] Optionally, it also includes an inner template, on which a mating slot adapted to the inner cylinder is fixedly provided.

[0015] The present invention provides a split-type precast box girder ventilation hole forming mold, which has the following advantages compared with the prior art:

[0016] By setting the vent template into a separate structure consisting of an inner cylinder, an outer cylinder, and a connecting sleeve, it can be dismantled sequentially during removal, minimizing damage to the inner wall of the vent and reducing the risk of damaging the plug plate. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0018] Figure 1 This is an overall structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 This is a utility model Figure 2 Structural diagram at point A;

[0021] Figure 4 This is a structural diagram of the connecting plate of this utility model.

[0022] The components are: 1. Inner cylinder; 2. Outer cylinder; 3. Connecting sleeve; 4. Insertion ring; 5. Annular groove; 6. Connecting plate; 7. Screw; 8. Insertion hole; 9. Threaded sleeve; 10. Connecting rod; 11. Rotating plate; 12. Rotating shaft; 13. Insertion rod; 14. Inner template; 15. Butt joint slot. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that the terms "first," "second," etc., used in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0027] In addition, the term "multiple" should mean two or more.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] like Figures 1 to 4 As shown, a split-type precast box girder ventilation hole forming mold includes an inner cylinder 1, an outer cylinder 2, and several connecting sleeves 3. The inner cylinder 1, the outer cylinder 2, and the connecting sleeves 3 are coaxially arranged, and the connecting sleeves 3 are fixedly arranged between the inner cylinder 1 and the outer cylinder 2. The connecting sleeves 3 have a butt joint structure with the inner cylinder 1, the outer cylinder 2, and adjacent connecting sleeves 3. The inner cylinder 1, the outer cylinder 2, and the connecting sleeves 3 are fixedly connected by a fixing component.

[0030] Specifically, the venting hole mold is designed as a separate unit. The inner cylinder 1 is connected to the inner template 14 forming the end cap plate, and the outer cylinder 2 extends beyond the outer end of the end cap plate and connects to the outer template. The connecting sleeve 3 is placed between the inner cylinder 1 and the outer cylinder 2 and fixedly connected by a fixing component. After the concrete of the box girder end cap plate has solidified, the outer walls of the connecting sleeve 3, the inner cylinder 1, and the outer cylinder 2 are all adhered to the concrete. At this time, the fixing component can be loosened, and then the inner cylinder 1, the connecting sleeve 3, and the inner cylinder 1 can be removed in sequence. Because only a part of the venting hole template is removed each time, the force required for disassembly is small, and the damage to the inner concrete wall of the venting hole is minimal. In this embodiment, by setting the venting hole template as a separate structure of inner cylinder 1, outer cylinder 2, and connecting sleeve 3, it is possible to remove them sequentially during disassembly, resulting in less damage to the inner wall of the venting hole and making it less likely to damage the end cap plate.

[0031] The docking structure includes a matching insertion ring 4 and an annular groove 5. The insertion ring 4 is fixedly disposed at the inner end of the outer cylinder 2 and the connecting sleeve 3, and the annular groove 5 is formed at the outer end of the connecting sleeve 3 and the inner cylinder 1. Specifically, the inner diameter of the annular groove 5 is equal to the outer diameter of the insertion ring 4. The connecting sleeve 3 can be connected to the inner cylinder 1 or the outer cylinder 2 by the cooperation of the insertion ring 4 and the annular groove 5.

[0032] The fixing assembly includes a connecting plate 6 and a screw 7. The connecting plate 6 is fixedly disposed inside the inner cylinder 1, the connecting sleeve 3, and the outer cylinder 2. A threaded sleeve 9 is fixedly disposed at the outer end of the connecting plate 6 on the inner cylinder 1. Insertion holes 8 are provided on the connecting sleeve 3 and the connecting plate 6 on the outer cylinder 2. The screw 7 passes through all the insertion holes 8 and is threadedly connected to the threaded sleeve 9. Specifically, by tightening the screw 7 and the threaded sleeve 9, all the connecting sleeves 3, the outer cylinder 2, and the inner cylinder 1 can be fixedly connected together. When disassembling, the screw 7 can be unscrewed and removed to return to the separate state.

[0033] Each connecting plate 6 is fixedly connected to the inner wall of its corresponding inner cylinder 1, connecting sleeve 3, and outer cylinder 2 via multiple connecting rods 10. A rotating striking device is also included, used to rotate and strike all the connecting rods 10 on the same connecting plate 6. The rotating striking device includes a rotating plate 11, the outer end of which is fixedly connected to a rotating shaft 12 connected to an external driving device, and the inner end of which is fixedly connected to multiple insert rods 13, which are inserted between adjacent connecting rods 10. The connecting rods 10 and the insert rods 13 are arranged in a circumferential array. Specifically, striking along the axial direction of the vent hole and removing the inner cylinder 1, connecting sleeve 3, and outer cylinder 2 can easily cause cracks or fragmentation on the inner wall of the vent hole. Therefore, the inner cylinder 1, connecting sleeve 3, and outer cylinder 2 are first rotated and struck to detach their outer walls from the concrete inside the vent hole. After detachment, they can be removed. This rotational method causes less damage to the inner wall of the vent hole. During detachment, the rotating plate 11 is inserted into the cylinder and the insertion rod 13 is inserted between the connecting rods 10. Then, the external drive device drives the rotating plate 11 to rotate back and forth, which in turn drives the insertion rod 13 to strike the connecting rod 10 back and forth, thereby loosening the outer wall of the inner cylinder 1, outer cylinder 2, or connecting sleeve 3 from the concrete. At this point, it can be easily removed.

[0034] The inner cylinder 1, the outer cylinder 2, and the connecting sleeve 3 have the same outer diameter. Specifically, the same inner diameter makes the outer wall of the vent hole smooth. In addition, it can also be designed as a frustum shape with the diameter gradually decreasing from the outer cylinder 2 to the inner cylinder 1.

[0035] It also includes an inner template 14, on which a mating slot 15 adapted to the inner cylinder 1 is fixedly provided. Specifically, inserting the inner cylinder 1 into the mating slot 15 can achieve positioning and locking of the inner cylinder 1 on the mating slot 15.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A split-type precast box girder ventilation hole forming mold, characterized in that: It includes an inner cylinder (1), an outer cylinder (2) and several connecting sleeves (3). The inner cylinder (1), the outer cylinder (2) and the connecting sleeves (3) are coaxially arranged and the connecting sleeves (3) are fixedly arranged between the inner cylinder (1) and the outer cylinder (2). The connecting sleeves (3) have a docking structure with the inner cylinder (1), the outer cylinder (2) and the adjacent connecting sleeves (3). The inner cylinder (1), the outer cylinder (2) and the connecting sleeves (3) are fixedly connected by a fixing component.

2. The split-type precast box girder ventilation hole forming mold as described in claim 1, characterized in that: The docking structure includes a plug ring (4) and an annular groove (5) that are compatible with each other. The plug ring (4) is fixedly disposed at the inner end of the outer cylinder (2) and the connecting sleeve (3), and the annular groove (5) is opened at the outer end of the connecting sleeve (3) and the inner cylinder (1).

3. The split-type precast box girder ventilation hole forming mold as described in claim 1, characterized in that: The fixing component includes a connecting plate (6) and a screw (7). The connecting plate (6) is fixedly disposed inside the inner cylinder (1), the connecting sleeve (3), and the outer cylinder (2). A threaded sleeve (9) is fixedly disposed at the outer end of the connecting plate (6) on the inner cylinder (1). Insertion holes (8) are provided on the connecting plate (6) on the connecting sleeve (3) and the outer cylinder (2). The screw (7) passes through all the insertion holes (8) and is threadedly connected to the threaded sleeve (9).

4. The split-type precast box girder ventilation hole forming mold as described in claim 3, characterized in that: Each of the connecting plates (6) is fixedly connected to the inner wall of its corresponding inner cylinder (1), connecting sleeve (3), and outer cylinder (2) by a plurality of connecting rods (10).

5. The split-type precast box girder ventilation hole forming mold as described in claim 4, characterized in that: It also includes a rotary striking device for rotary striking all the connecting rods (10) on the same connecting plate (6).

6. The split-type precast box girder ventilation hole forming mold as described in claim 5, characterized in that: The rotating striking device includes a rotating plate (11), the outer end of which is fixedly connected to a rotating shaft (12) connected to an external driving device, and the inner end of which is fixedly connected to a plurality of insert rods (13), the insert rods (13) being inserted between two adjacent connecting rods (10).

7. The split-type precast box girder ventilation hole forming mold as described in claim 6, characterized in that: The connecting rod (10) and the insert rod (13) are both arranged in a circular array.

8. The split-type precast box girder ventilation hole forming mold as described in claim 1, characterized in that: The inner cylinder (1), the outer cylinder (2), and the connecting sleeve (3) have the same outer diameter.

9. The split-type precast box girder ventilation hole forming mold as described in claim 1, characterized in that: It also includes an inner template (14), on which a docking slot (15) adapted to the inner cylinder (1) is fixedly provided.

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