CN100485151C - Water stop screw rod - Google Patents

Abstract

The invention discloses a water-stop screw, which is suitable for underground shear walls or concrete walls requiring waterproofing, and belongs to the technical field of building components. The water-stop screw includes a water-stop sheet with holes and a threaded rod passing through the holes , the water-stop sheet is sleeved in the middle of the threaded rod and the two are welded and fixed. It is characterized in that: it also includes an inner jacking block, the end of the threaded rod is connected with the axial threaded hole of the inner jacking block, and the inner jacking block The outer end face of the outer end face is axially fixed to a screw rod, and an outer top block is arranged on the screw rod, and the combination of the inner top block and the outer top block is in the shape of a round table, and an elastic round table sleeve is tightly fitted outside the round table. The present invention has a simple structure, The material is saved, the water-stop effect is remarkable, the construction is convenient, and the construction time is shortened. The parts such as the screw belt top block can be reused, and the construction cost is reduced.

Description

Water stop screw

technical field

The invention discloses a water-stop screw, which is suitable for underground shear walls or concrete walls requiring waterproofing, and belongs to the technical field of building components.

Background technique

For underground shear wall formwork construction, components with waterproof requirements usually use finished waterproof screws. Its structure is (as shown in Figure 6), including a screw rod 1 with a section of screw thread 11 twisted at both ends. There is a sealed weld between the sheet 2 and the screw 1, and the two ends of the screw 1 correspond to the water-stop sheet in the middle and are symmetrically fixed with the water-stop disc 3, and the top block 4 that can be detachably installed is closely arranged on the outside of the water-stop disc. When in use, the screw is placed horizontally in the shear wall, and the distance between the outer sides of the top blocks on both sides is equal to the thickness of the shear wall, that is, the circular piece is located at the center point of the shear wall, and the outer side of the top block is in contact with the formwork There is no gap between the two ends of the screw, and both ends of the screw correspond to the holes on both sides of the formwork. The reinforcements outside the formwork (such as wooden steel pipes, etc.) are fixed with the screws at both ends. Once solidified, the mold can be removed. The disadvantage is that the structure of the water-stop screw is complex, which leads to complicated installation steps, and the screw is for one-time use, resulting in a lot of material waste and high construction costs. The block is chiseled out, and then the cavity of the top block is filled with cement mortar and leveled with the wall surface. This series of formwork removal steps are quite labor-intensive and time-consuming, resulting in high construction costs.

As another example, Chinese Patent No. 96216652.9 discloses a water-stop bolt for construction, as shown in FIG. 7 . The structure includes waterproof board 1, waterproof screw 2, connecting cone 3, template 4, pressure plate 5, special-shaped nut 6, fastening screw 7, pressure bearing 8 and other components. The disadvantage of this structure is that the fastening screw and connecting cone If it is not solidly connected, it is necessary to unscrew the fastening screw first when disassembling, and then use a special tool matched with the connecting cone to unscrew it, resulting in a waste of construction time. In addition, when purchasing the water-stop screw At the same time, it is also necessary to additionally purchase a special tool for disassembling the connecting cone. For buyers, the cost of this product is high, which makes it difficult to widely promote this product.

Contents of the invention

The present invention aims at the deficiencies of the prior art, and aims to provide a water-stop screw with simple structure, material saving, and convenient disassembly and installation.

The object of the present invention is achieved as follows: a water-stop screw, including a water-stop piece with a hole, and a threaded rod passing through the hole, the water-stop piece is sleeved in the middle of the threaded rod and the two are welded and fixed, and its characteristics In that: it also includes an inner jacking block, the end of the threaded rod is matched and connected with the axial threaded hole of the inner jacking block, and the outer end surface of the inner jacking block is axially fixed to a screw rod, and an outer jacking block is arranged on the screw rod, and an inner jacking block is arranged on the screw rod. The combination of the block and the outer top block is in the shape of a round table, and an elastic round table cover is arranged on the outside of the round table in tight fit.

The present invention is further set to:

The outer top block is provided with an axial through hole for transition fit with the screw rod.

The thread on the screw rod is a coarse thread, and the outer end of the screw rod is set as a regular hexagonal column or a flat column or a square column with elliptical opposite sides. The design function of the coarse thread is to speed up the construction installation or disassembly, and prolong the service life of the screw; the design of the outer end of the screw is conducive to the convenience of disassembly, and can be used in conjunction with a wrench or sleeve of the corresponding shape.

In summary, compared with the prior art, the present invention has the advantages of simple and convenient structure, saving materials, convenient disassembly and installation, shortened construction hours, saved construction costs, and high material reuse rate.

The present invention is further described below in conjunction with description of drawings and specific embodiments:

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

Fig. 3 is the first structural representation of an end of the screw rod of the present invention;

Fig. 4 is the second structural representation of an end of the screw rod of the present invention;

Fig. 5 is the third structural representation of an end of the screw rod of the present invention;

Fig. 6 is the first prior art listed in the present invention;

Fig. 7 is the second prior art listed in the present invention.

Detailed ways

As shown in Figure 1, a water-stop screw includes a water-stop piece 1 with a hole 11, and a threaded rod 2 passing through the hole 11, and the end of the threaded rod 2 is connected with the axial threaded hole 321 of the inner top block 32. , and the outer end surface of the inner top block 32 is axially fixed to a screw rod 4, and the screw rod is equipped with an outer top block 33, and the combination of the inner top block 32 and the outer top block 33 is a circular truncated shape.

An elastic circular platform cover 31 is closely fitted outside the circular platform formed by the inner jacking block 32 and the outer jacking piece 33 .

The outer top block 33 is provided with an axial through hole 331 which transitionally fits with the screw rod 4 .

The water-stop sheet 1 and the threaded rod 2 are fixedly connected by welding, and the water-stop sheet 1 is placed in the middle of the threaded rod 2 .

The screw thread on the screw rod 4 is a coarse thread, and the outer end of the screw rod 4 is set as a regular hexagonal column 41 or a flat column 42 or a square column 43 with ellipse opposite sides. They are shown in Figure 3, Figure 4, and Figure 5 respectively.

When in use, the integrated structure composed of the water stop sheet 1 and the threaded rod 2 is placed in the formwork on both sides. The one-piece structure assembled into the elastic round table cover 31, the outer top block 33, and the screw rod 4 of the band inner top block 32 is also placed in the formwork, wherein the screw rod 4 and the inner top block 32 are a ready-made structure welded into one, and the outer Jacking block 33 is sleeved on the screw rod 4 of inner jacking block 32, and inner jacking block 32 and outer jacking block 33 just form a circular frustum shape, and then elastic round table cover 31 is sleeved outside the combination of inner jacking block 32 and outer jacking block 33. Then one end of the screw rod 4 is passed through the hole of the formwork from the inside to the outside, and finally the threaded hole 321 of the inner jack block 32 is placed on the threaded rod 2, and then the screw rod 4 is rotated, and the outer end surface of the outer jack block 33 is in contact with the outer end surface of the outer jack block 33 while tightening. The inner plane of the formwork shall prevail. One end of the screw 4 is exposed on the outer surface of the template, and this section of the screw 4 is used for positioning when the template is held and reinforced. When the shear wall reaches the mold removal standard, use the corresponding socket wrench to put it on the end structure of the screw rod 4, rotate the screw rod 4, so that the elastic round table sleeve 31 is squeezed, and the inner top block 32 has a loose gap , and then the inner top block 32 is unscrewed by the screw rod 4, and the outer top block 33 has been pushed out of the mold, and then the elastic round table sleeve 31 can be taken out with a small stick or small pliers, and finally the chisel is removed and left The holes can be filled with concrete or mortar corresponding to the shear wall.

The screw rod 4, the inner top block 32, the outer top block 33, and the elastic round table cover 31 are all reusable. The inner top block 32 is made of metal, the outer top block 33 is made of plastic, and the elastic round table cover 31 is made of rubber or elastic plastic. The advantage of adopting the inner and outer jacking blocks is to save the use cost of the threaded rod 2, and the screw rod 4 is fixed on the end face of the inner jacking block 32, so that the outer jacking block 33 and the screw rod are slidingly socketed, which is labor-saving and easy to disassemble.

Claims (3)

1, a kind of sealing up screw, the sealing sheet (1) that comprises (11) with holes, with threaded rod (2) by hole (11), centre and both welded types that sealing sheet (1) is sheathed on threaded rod (2) are connected, it is characterized in that: also comprise interior jacking block (32), the end of threaded rod (2) cooperates with the axial thread hole (321) of interior jacking block (32) and links to each other, and the outer face of interior jacking block (32) screw rod (4) that axially is connected, screw rod (4) is gone up to cooperate and is provided with outer jacking block (33), interior jacking block (32) is a truncated conical shape with the combination of outer jacking block (33), and this round platform closely cooperates outward and is provided with an elasticity round platform cover (31).

2, a kind of sealing up screw according to claim 1 is characterized in that: described outer jacking block (33) is provided with the axially extending bore (331) with screw rod (4) interference fits.

3, a kind of sealing up screw according to claim 1 is characterized in that: the screw thread on the described screw rod (4) is a coarse thread, and the outer end of screw rod (4) is made as positive hexagon post (41) or with the flat post (42) or the square column (43) of oval opposite side.

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