High-strength material composite embedded sleeve and embedded sleeve forming die

Abstract

The utility model discloses a high-strength material composite embedded sleeve and an embedded sleeve forming die. The sleeve comprises a sleeve main body formed by pouring polyamide fibers, the sleeve main body is composed of a section of rod body and a sleeve head connected to the upper end of the section of rod body, and the sleeve further comprises a nut embedded into the sleeve head during pouring. And the rod body is provided with a through cavity which is communicated with the threaded hole of the nut, and a connecting bolt can penetrate through the through cavity and is screwed with the nut when the sleeve main body is pre-embedded in concrete. The utility model has the advantages that: the required metal material is very few, the material cost is obviously reduced, the manufacturing process is simple, molding can be realized only by adopting a casting mold, the processing efficiency is high, and the production cost is reduced. At least one pair of parallel side surfaces in the nut is exposed out of the sleeve head, so that the problem that the nut rotates along with the sleeve head when materials are aged is solved.

Description

Technical Field

[0001] The utility model relates to an urban rail transit shield embedded sleeve and manufacturing equipment, in particular to a high-strength material composite embedded sleeve and a embedded sleeve forming die. Background Art

[0002] With the rapid development of infrastructure construction and civil engineering, embedded sleeves are increasingly used in construction projects. This is especially true in urban rail transit construction, where, as key components supporting pipe segments, embedded sleeves play a vital role in connecting, securing, and supporting the structure. However, traditional embedded sleeves are typically manufactured entirely from stainless steel. While these sleeves excel in strength and corrosion resistance, the high cost of manufacturing these sleeves, which utilize a large amount of stainless steel, limits their application in projects with limited budgets. This is especially true as project scale increases, forcing the number of embedded sleeves to increase, further increasing the financial burden of material procurement and processing. In an increasingly competitive market, construction companies and contractors face the dual pressures of reducing costs and improving efficiency. Traditional all-stainless steel sleeve solutions are particularly unsuitable in this context. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a high-strength material composite embedded sleeve and an embedded sleeve forming mold for solving the problem of high construction cost caused by high material cost of manufacturing the sleeve.

[0004] In order to solve the above technical problems, the utility model provides a high-strength composite embedded sleeve, which includes a sleeve body formed by casting polyamide fiber. The sleeve body is composed of a rod body and a sleeve head connected to the upper end of the rod body. It also includes a nut embedded in the sleeve head during casting. The rod body has a through cavity that penetrates the threaded hole of the nut and can enable a connecting bolt to pass through the through cavity and be screwed to the nut when the sleeve body is embedded in concrete.

[0005] The cross-sectional area of ​​the nut is larger than the cross-sectional area of ​​the through cavity.

[0006] The nut is made of stainless steel.

[0007] The nut has at least a pair of mutually parallel side surfaces exposed outside the sleeve head.

[0008] The connecting bolts are hexagon socket bolts or hexagon socket bolts.

[0009] A pre-embedded sleeve forming mold for manufacturing the high-strength material composite pre-embedded sleeve as described above, comprising an upper mold having an upper pouring cavity and a lower mold having a lower pouring cavity, the upper mold being provided with a pouring hole that passes through the upper pouring cavity, the lower pouring cavity having a core rod extending into the upper pouring cavity, the top of the core rod having a connecting section for placing a nut, the upper mold and the lower mold being matched to form a forming cavity for forming the sleeve body.

[0010] The nut has at least a pair of side surfaces parallel to each other and in contact with the side wall of the upper casting cavity.

[0011] A mutually cooperating limiting structure is provided between the bottom surface of the upper mold and the top surface of the lower mold.

[0012] The bottom of the lower pouring cavity is provided with a positioning hole for positioning the core rod.

[0013] The core rod is fixedly installed in the lower pouring cavity.

[0014] The advantages of the utility model are:

[0015] (1) Directly combining the stainless steel nut with the polyamide fiber to form the embedded sleeve, on the one hand, requires very little metal material, which significantly reduces the material cost; on the other hand, its manufacturing process is simple, and it can be formed by using a casting mold, which has high processing efficiency and reduces production costs.

[0016] (2) The nut has at least one pair of parallel side surfaces exposed outside the socket head, which avoids the problem of the nut rotating when the material ages.

[0017] (3) A molding die is specially designed for manufacturing the embedded sleeve. On the one hand, the mold structure is reasonably designed and can mold the embedded sleeve in one go, with high processing efficiency. On the other hand, the molding die is easy to manufacture and has low equipment cost, which further reduces production costs.

[0018] (4) By providing a positioning hole for positioning the core rod at the bottom of the lower pouring cavity of the forming mold, the demoulding operation after the product is formed is facilitated, further improving the processing efficiency. At the same time, it is also convenient for installation and disassembly during the production and maintenance process, thereby improving the flexibility of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional view of the high-strength composite embedded sleeve of the utility model;

[0020] Figure 2 This is a side view of the high-strength composite embedded sleeve of the utility model;

[0021] Figure 3This is a top view of the high-strength composite embedded sleeve of the utility model;

[0022] Figure 4 This is a cross-sectional view of the utility model's high-strength composite embedded sleeve in use;

[0023] Figure 5 It is a cross-sectional view of the pre-embedded sleeve forming die in the present utility model;

[0024] Figure 6 Schematic diagram of the cross-sectional structure of the embedded sleeve forming die in the present utility model;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the upper mold in the utility model. DETAILED DESCRIPTION

[0026] The high-strength composite pre-embedded sleeve and its manufacturing mold of the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. Example

[0027] like Figure 1 As shown, the high-strength material composite embedded sleeve of the present invention includes a sleeve body 1 formed by casting polyamide fiber. The sleeve body 1 is composed of a rod body 2 and a sleeve head 3 connected to the upper end of the rod body. It also includes a nut 31 embedded in the sleeve head 3 during casting. The rod body 2 has a through cavity 4 that penetrates the threaded hole of the nut 31, wherein the cross-sectional area of ​​the nut 31 is larger than the cross-sectional area of ​​the through cavity 4 and the inner diameter of the through cavity 4 is slightly larger than the inner diameter of the threaded hole of the nut 31, thereby enabling a connecting bolt 5 to pass through the through cavity 4 and be screwed to the nut 31 when the sleeve body 1 is embedded in the concrete.

[0028] Furthermore, the nut 31 is made of stainless steel, and the connecting bolt 5 is a hexagon socket bolt or a hexagon socket bolt. Example

[0029] Since the sleeve body 1 is cast from polyamide fiber, it may age over time. To address this issue, this embodiment, based on the first embodiment, exposes at least one pair of mutually parallel side surfaces of the nut 31 outside the sleeve head 3. For example, when the nut 31 has a pair of mutually parallel side surfaces, the exposed portion is two parallel side surfaces of the nut (e.g., Figure 3 As shown), of course, when the nut 31 has two pairs of mutually parallel side surfaces exposed outside the sleeve head 3, the two pairs of V-shaped surfaces composed of two adjacent side surfaces are exposed outside the sleeve head (that is, the exposed part is not cast), and the effect is better. Example

[0030] The present embodiment is a pre-embedded sleeve mold for manufacturing a high-strength material composite pre-embedded sleeve as described in Example 1, which includes an upper mold 7 with an upper pouring cavity 11 and a lower mold 9 with a lower pouring cavity 10. The upper mold 7 is provided with a pouring hole 6 that passes through the upper pouring cavity 11. The lower pouring cavity 10 has a core rod 8 that extends into the upper pouring cavity 11. The top of the core rod 8 has a connecting section for accommodating the nut 31. The upper mold 7 and the lower mold 9 are matched to form a molding cavity for molding the sleeve body 1, wherein the upper end of the core rod 8 extends into the upper pouring cavity 11, and the length of the extension is such that after being matched with the nut 31, there is still a distance left, and the distance forms the bottom surface casting thickness of the sleeve head 3.

[0031] Furthermore, in order to improve the processing efficiency, a mutually cooperating limiting structure 12 can be provided between the bottom surface of the upper mold 7 and the top surface of the lower mold 9, for example: Figure 7 As shown, if a protrusion is provided on the bottom surface of the upper mold 7, then a groove matching the protrusion must be designed on the top surface of the lower mold 9, thereby achieving accurate and fast mold closing operation. Similarly, when a groove is provided on the bottom surface of the upper mold 7, then a protrusion matching the protrusion must be designed on the top surface of the lower mold 9, which can also achieve the above purpose.

[0032] Furthermore, a positioning hole 13 for positioning the core rod 8 is provided at the bottom of the lower pouring cavity 10, so that the core rod 8 can be inserted into the lower pouring cavity 10. At this time, there is an interference fit between the lower part of the core rod 8 and the positioning hole 13. Of course, as for the installation method of the core rod, the core rod 8 can also be installed in the lower pouring cavity 10 in other ways, for example: directly forming the core rod 8 directly in the lower pouring cavity 10. Such a change also falls within the protection scope of the present utility model.

[0033] The molding process is briefly described below using the example of a casting cavity 10 having a positioning hole 13 provided at the bottom thereof for positioning the core rod 8.

[0034] During the forming process, the core rod 8 in the lower mold is inserted into the positioning hole 13, and the lower end is fixed in the positioning hole by being struck with a hammer, and then a nut is placed on the connecting section at the top of the core rod (the top connecting section of the core rod may have threads, and when there are threads, the nut is screwed and fixed to the core rod through the threads. When the top connecting section of the core rod has no threads, the top connecting section of the core rod should be a necked section for placing the nut, and the diameter of the necked section is smaller than the inner diameter of the threaded hole, and the diameter of the core rod body section is larger than the inner diameter of the threaded hole). Then, the limiting structure 12 is used to align and fix the lower mold 9 and the upper mold 7. Finally, high-strength material is injected from the pouring hole 6 of the upper mold 7 to fill the upper pouring cavity 11 and the lower pouring cavity 10 to form the sleeve body 1. Example

[0035] In order to solve the problem that the sleeve body 1 formed by casting polyamide fiber may age over time, it is necessary to consider the anti-rotation problem. For this purpose, a specific structure is designed in the upper casting cavity 11, which corresponds to the corresponding high-strength material composite embedded sleeve in Example 2, that is, the nut 31 has at least a pair of parallel side surfaces in contact with the side wall of the upper casting cavity 11, which can be used to manufacture the two structures of sleeve bodies mentioned in Example 2 respectively.

Claims

1. A high-strength composite embedded sleeve, characterized by: The invention comprises a sleeve body (1) formed by casting polyamide fiber, the sleeve body (1) comprising a rod body (2) and a sleeve head (3) connected to the upper end of the rod body, and further comprising a nut (31) embedded in the sleeve head (3) during casting, the rod body (2) having a through cavity (4) penetrating the threaded hole of the nut (31), and enabling a connecting bolt (5) to pass through the through cavity (4) and be screwed to the nut (31) when the sleeve body (1) is pre-buried in concrete.

2. The high-strength composite embedded sleeve according to claim 1, characterized in that: The cross-sectional area of ​​the nut (31) is greater than the cross-sectional area of ​​the through cavity (4).

3. The high-strength composite embedded sleeve according to claim 1 or 2, characterized in that: The nut (31) is made of stainless steel.

4. The high-strength composite embedded sleeve according to claim 3, characterized in that: The nut (31) has at least a pair of mutually parallel side surfaces exposed outside the sleeve head (3).

5. The high-strength composite embedded sleeve according to claim 1, 2 or 4, characterized in that: The connecting bolt (5) is a hexagon socket bolt or a hexagon socket bolt.

6. A pre-embedded sleeve forming die for manufacturing the high-strength composite pre-embedded sleeve according to claims 1-5, characterized in that: The invention comprises an upper mold (7) having an upper pouring cavity (11) and a lower mold (9) having a lower pouring cavity (10), wherein the upper mold (7) is provided with a pouring hole (6) which is communicated with the upper pouring cavity (11), and the lower pouring cavity (10) has a core rod (8) which extends into the upper pouring cavity (11), and the top of the core rod (8) has a connecting section for accommodating a nut (31), and the upper mold (7) and the lower mold (9) are matched to form a molding cavity for molding the sleeve body (1).

7. The embedded sleeve forming die according to claim 6, characterized in that: The nut (31) has at least a pair of mutually parallel side surfaces in contact with the side wall of the upper casting cavity (11).

8. The embedded sleeve forming die according to claim 6 or 7, characterized in that: A mutually cooperating limiting structure is provided between the bottom surface of the upper die (7) and the top surface of the lower die (9).

9. The embedded sleeve forming die according to claim 8, characterized in that: A positioning hole (13) for positioning the core rod (8) is provided at the bottom of the lower pouring cavity (10).

10. The embedded sleeve forming die according to claim 8, characterized in that: The core rod (8) is fixedly installed in the lower pouring cavity (10).

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