Three-section type water stop screw rod for cooling cast-in-place concrete

Abstract

The utility model relates to the technical field of split screws, in particular to a three-section type water stop screw for cooling cast-in-place concrete, which comprises fastening rods, an indwelling rod and fastening fasteners, two ends of the indwelling rod are respectively in threaded connection with the fastening rods, the fastening fasteners are in threaded connection with the peripheries of the fastening rods, the indwelling rod is a hollow inner threaded pipe, and the indwelling rod is a hollow inner threaded pipe. The inner circumference of the remaining rod is in threaded connection with the outer circumference of the fastening rod; after concrete cooling is completed, plugs are fixed to the two ends of the remaining rod, and external thread sections with the diameter smaller than that of the remaining rod are arranged at the two ends of the remaining rod; the end, located on the fastening rod, of the fastening fastener is provided with a fastening nut, and the end, located on the remaining rod, of the fastening fastener is provided with a split nut. The fastening nut is in threaded connection with the fastening rod; the split nut is in threaded connection with the external thread section, the hollow remaining rod is used, when concrete needs to be cooled, water can be injected into the remaining rod, and the advantage of improving the cooling effect of the concrete is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tension screws, in particular to a three-section water-stop screw used for cooling cast-in-place concrete. Background Art

[0002] As the urban development process continues to evolve, more and more buildings are developing towards super-high-rise buildings. The building height continues to increase, and the cross-sectional dimensions and concrete grades of the core tube shear walls and basement exterior walls are also gradually increasing. At present, shear walls are usually cast-in-place concrete structures. The formwork construction requires the use of tension bolts to fix and tie the formwork. For walls with waterproofing requirements, water-stop screws are usually used as reinforcements. During the pouring and curing of high-grade large-section concrete, the internal temperature of the concrete is often high due to cement hydration, and the temperature difference between the inside and outside is large, which produces temperature stress, and then temperature cracks, and certain cooling measures need to be taken.

[0003] The Chinese utility model patent with announcement number CN213683218U, published on July 13, 2021, discloses a three-stage waterstop screw, including an inner rod, on which a waterstop plate is fixed, and the two ends of the inner rod are respectively threadedly connected to the outer rod, and a limit plug is fixedly sleeved on the outer rod; the inner rod is a solid screw, and a first external thread is provided on its outer peripheral wall, and the outer rod is a hollow sleeve, and an internal thread used in conjunction with the first external thread is provided on its inner wall; the outer rod is provided with a plurality of annular grooves distributed along the length direction of the outer rod on the outer wall at one end close to the inner rod, and a plurality of annular protrusions corresponding to the annular grooves are provided on the inner wall of the limit plug.

[0004] The above patent has the effect of increasing the strength of the three-stage screw and reducing the occurrence of mold explosion, but it cannot cool the interior of the concrete. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a three-stage water-stop screw for cooling cast-in-place concrete. The utility model uses a hollow retaining rod. When the concrete needs to be cooled, water can be injected into the retaining rod, which has the advantage of improving the cooling effect of the concrete.

[0006] The utility model provides the following technical solutions:

[0007] A three-stage water-stop screw for cooling cast-in-place concrete comprises a fastening rod, a retaining rod and a fastening fastener, wherein both ends of the retaining rod are respectively threadedly connected to a fastening rod, the fastening fastener is threadedly connected to the outer periphery of the fastening rod, the retaining rod is a hollow internally threaded tube, and the inner periphery of the retaining rod is threadedly connected to the outer periphery of the fastening rod; after the concrete is cooled, plugs are fixed at both ends of the retaining rod.

[0008] Furthermore, external thread sections with a smaller diameter than the retention rod are provided at both ends of the retention rod; a fastening nut is provided at one end of the fastening rod, and a tension nut is provided at one end of the fastening rod; the fastening nut is threadedly connected to the fastening rod; and the tension nut is threadedly connected to the external thread section.

[0009] Furthermore, a water-stop gasket is fixed between the tension nut and the retention rod.

[0010] Furthermore, a water stop ring is fixed in the middle of the retention rod.

[0011] The utility model has the following beneficial technical effects:

[0012] 1. The utility model uses a hollow retention rod. When the concrete needs to be cooled, water can be injected into the retention rod, which has the advantage of improving the cooling effect of the concrete.

[0013] 2. The fastening rod of the utility model can be separated from the retention rod and can be recycled and reused, which has the advantages of saving costs and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 is a structural schematic diagram of a fastening rod;

[0016] Figure 3 It is a schematic diagram of the installation state of the tension nut;

[0017] Figure 4 It is a schematic diagram of the structure of the retention rod after the concrete is cooled;

[0018] Figure 5 Schematic diagram of the structure of the retention rod.

[0019] The reference numerals in the figure represent:

[0020] 1. Fastening rod; 2. Retention rod; 21. Water-stop gasket; 22. External thread section; 23. Water-stop ring; 3. Fastening fastener; 31. Fastening nut; 32. Tension nut; 4. Plug. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1-Figure 5 As shown, the three-stage water-stop screw for cooling cast-in-place concrete in this embodiment includes a fastening rod 1, a retaining rod 2 and a fastening fastener 3. The two ends of the retaining rod 2 are respectively threadedly connected to a fastening rod 1, and the fastening fastener 3 is threadedly connected to the outer periphery of the fastening rod 1. The retaining rod 2 is a hollow internally threaded tube, and the inner periphery of the retaining rod 2 is threadedly connected to the outer periphery of the fastening rod 1; after the concrete is cooled, plugs 4 are fixed at both ends of the retaining rod 2.

[0024] Through the three-stage design of two fastening rods 1 and a retention rod 2, the water stop screw is divided into two end fastening parts and a cast-in-place structure retention part. Under the premise of not changing the fixing and tensioning function of the rod itself, a hollow retention rod 2 is retained in the cast-in-place concrete structure to provide a channel for uniform dissipation of hydration heat inside the structure without affecting the strength of the cast-in-place structure. After the curing period is reached, the hole of the retention rod 2 is sealed with a plug 4 to carry out the subsequent construction process.

[0025] Furthermore, external thread sections 22 with a diameter smaller than that of the retention rod 2 are provided at both ends of the retention rod 2; a fastening nut 31 is provided at one end of the fastening fastener 3 located at the fastening rod 1, and a tension nut 32 is provided at one end of the fastening fastener 3 located at the retention rod 2; the fastening nut 31 is threadedly connected to the fastening rod 1; the tension nut 32 is threadedly connected to the external thread section 22.

[0026] Both ends of the retention rod 2 are provided with external thread sections 22 with a diameter smaller than the retention rod 2, so that the retention rod 2 can be fixed to other components. A fastening nut 31 is installed at the outer end of the fastening fastener 3, and a tension nut 32 is installed inside the fastening fastener 3. When the fastening nut 31 is connected to the thread of the fastening rod 1, the fastening fastener 3 is firmly fixed.

[0027] Furthermore, a water-stop gasket 21 is fixed between the tension nut 32 and the retention rod 2 .

[0028] Furthermore, a water stop ring 23 is fixed in the middle of the retention rod 2 .

[0029] The method of using the utility model is:

[0030] When reinforcing the formwork, the tension nut 32 is installed on the retention rod 2, and the position of the tension nut 32 is adjusted according to the size of the reinforced component; the tension nut 31 assists the fastening rod 1 to connect with the retention rod 2, and the fastening fastener 3 and the fastening nut 32 are used to fix and tie the formwork;

[0031] After the concrete pouring is completed, the fastening rod 1 and the fastening fastener 3 are removed and recovered, and a multi-connected water pipe with a matching caliber is used to extend into the retention rod 2 and inject water to cure the concrete;

[0032] After the concrete curing is completed, the retaining rod 2 is sealed with a plug 4, and the subsequent construction process can be carried out after sealing.

[0033] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A three-stage water-stop screw for cooling cast-in-place concrete, comprising a fastening rod (1), a retention rod (2) and a fastening fastener (3), wherein both ends of the retention rod (2) are respectively threadedly connected to a fastening rod (1), and the fastening fastener (3) is threadedly connected to the outer periphery of the fastening rod (1), characterized in that: The retention rod (2) is a hollow internally threaded tube, and the inner circumference of the retention rod (2) is threadedly connected to the outer circumference of the fastening rod (1); after the concrete is cooled, plugs (4) are fixed at both ends of the retention rod (2).

2. A three-stage water-stop screw for cooling cast-in-place concrete according to claim 1, characterized in that: External thread sections (22) having a smaller diameter than the retention rod (2) are provided at both ends of the retention rod (2); a fastening nut (31) is provided at one end of the fastening fastener (3) located at the fastening rod (1), and a tension nut (32) is provided at one end of the fastening fastener (3) located at the retention rod (2); the fastening nut (31) is threadedly connected to the fastening rod (1); and the tension nut (32) is threadedly connected to the external thread section (22).

3. A three-stage water-stop screw for cooling cast-in-place concrete according to claim 2, characterized in that: A water-stop gasket (21) is fixed between the tension nut (32) and the retention rod (2).

4. The three-stage water-stop screw for cooling cast-in-place concrete according to claim 1, characterized in that: A water stop ring (23) is fixed at the middle of the retention rod (2).

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