A bentonite-based rubber water stop device that expands when exposed to water

Abstract

The invention relates to the field of engineering materials, and belongs to the improvement of the waterproof and anti-leakage waterstop strip structure of a construction joint of a building engineering, in particular to a bentonite-based rubber waterstop strip device that swells when in contact with water. The outer diameter of a rubber cylindrical tube closed at both ends is 28-32 mm, the wall thickness is 3.5-4.5 mm, V-shaped water-permeable holes are evenly arranged on the cylinder wall, the large end of the V-shaped water-permeable hole faces outward, the small end opening is connected to a trumpet-shaped reduced-diameter hole body extending into the rubber cylindrical tube, the trumpet-shaped reduced-diameter hole body extends out of the inner wall of the rubber cylindrical tube by a length of 4-6 mm, the large end opening diameter of the V-shaped water-permeable hole is 3.5-4.5 mm, the diameter of the reduced hole of the trumpet-shaped reduced-diameter hole body is 0.4-0.6 mm, the axial cross-section shape of the outer wall of the trumpet-shaped reduced-diameter hole body is an inwardly concave arc wall, and bentonite filler is arranged in the rubber cylindrical tube closed at both ends. The structure is simple and reasonable, the performance is reliable, the expansion ratio and expansion rate of the water stop strip can be controlled, the length of the water stop strip can be adjusted arbitrarily, water can be easily let in and difficult to let out, and the cost is low.

Description

Technical Field

[0001] The invention relates to the field of engineering materials, and belongs to the improvement of the waterproof and anti-leakage waterstop strip structure of construction joints in building engineering, in particular to a bentonite-based rubber waterstop strip device that swells when in contact with water. Background Art

[0002] At present, most of the caulking waterstop strips are made of polymer water-swelling materials. In the "Bentonite Rubber Water-Swelling Waterstop Strip" JG / T141-2001 implemented in 2012, according to its index requirements, it refers to the waterstop strips that are a fusion of bentonite particles and rubber particles. Due to the problem of process, there are few mature products of this kind of bentonite waterstop strip on the market. The above waterstop strips are not only expensive, but also the expansion ratio cannot be adjusted or is difficult to adjust. Summary of the invention

[0003] The purpose of the present invention is to provide a bentonite-based rubber waterstop device that swells when exposed to water. The device has a simple and reasonable structure, reliable performance, can control the expansion ratio and expansion rate of the waterstop, and can adjust the length of the waterstop at will. It is easy to let in water but difficult to let out water, and has low cost.

[0004] The object of the present invention is achieved as follows: a bentonite-based rubber water stop strip device that swells when exposed to water, a rubber cylinder with closed ends having an outer diameter of 28-32 mm and a wall thickness of 3.5-4.5 mm, V-shaped water-permeable holes are evenly distributed on its cylinder wall, the large end of the V-shaped water-permeable hole faces outward, and the small end opening is connected to a trumpet-shaped reduced-diameter hole body extending into the rubber cylinder, the length of the trumpet-shaped reduced-diameter hole body extending out of the inner wall of the rubber cylinder is 4-6 mm, the large end opening diameter of the V-shaped water-permeable hole is 3.5-4.5 mm, the diameter of the reduced hole of the trumpet-shaped reduced-diameter hole body is 0.4-0.6 mm, the axial cross-section shape of the outer wall of the trumpet-shaped reduced-diameter hole body is an inwardly concave arc wall, and a bentonite filler is arranged in the rubber cylinder with closed ends.

[0005] Working principle of the present invention:

[0006] According to the length of the construction joint or expansion joint, when shortening, the waterstop strip is cut, and the cut end of the rubber jacket is vulcanized with a vulcanizer after cutting; when extending, one end of each of the two cut waterstop strips is vulcanized with a vulcanizer at both ends of the joint, and excessive loss of filler is avoided as much as possible during connection; the cut or connected waterstop strips can be embedded in the construction joint or expansion joint of the concrete structure.

[0007] The present invention opens a V-shaped water-permeable hole on the rubber sleeve, so that water can penetrate into the water-stop strip, so that the filling material expands when it encounters water, and the internal water body is difficult to seep out. This V-shaped hole utilizes the elastic deformation mechanism of rubber: when the external water pressure is relatively large, the elasticity of the V-shaped hole becomes larger, and the water body can seep in from the hole; when the internal water pressure is relatively large, the rubber water-permeable hole is in an inverted V shape relative to the internal water-permeable hole at this time, so that the water pressure is reduced or even sealed under the water pressure, and the water body is difficult to seep out.

[0008] The water-swellable material of the present invention is a filler material that swells when exposed to water and is composed of bentonite particles as a base material and clay particles. The expansion rate and expansion velocity are controlled by adjusting the proportion of the bentonite particles in the filler material, so that the expansion rate can reach 2-4 times after exposure to water for 24 hours and the maximum expansion rate can reach 4-6 times.

[0009] The invention has a simple and reasonable structure and reliable performance, and can control the expansion ratio and expansion rate of the water stop strip, arbitrarily adjust the length of the water stop strip, and has easy water inlet and difficult water outlet, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below in conjunction with the accompanying drawings. Figure 1 It is a schematic diagram of the main structure of the present invention, Figure 2 1 is a schematic diagram of the left-side cross-sectional structure, Figure 3 for Figure 2 A partial enlarged schematic diagram of Figure 4 for Figure 1 AA cross-sectional structure schematic diagram. DETAILED DESCRIPTION

[0011] A bentonite-based rubber water stop device that swells when exposed to water, such as Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the rubber cylinder 1 with closed ends has an outer diameter of 28-32㎜ and a wall thickness of 3.5-4.5㎜. V-shaped water-permeable holes 2 are evenly distributed on the cylinder wall. The large end of the V-shaped water-permeable hole 2 faces outward, and the small end opening is connected to the trumpet-shaped reduced-diameter hole body 3 extending into the rubber cylinder. The length of the trumpet-shaped reduced-diameter hole body 3 extending out of the inner wall of the rubber cylinder is 4-6㎜. The diameter of the large end opening of the V-shaped water-permeable hole 2 is 3.5-4.5㎜, and the diameter of the reduced diameter hole of the trumpet-shaped reduced-diameter hole body 3 is 0.4-0.6㎜. The axial cross-section shape of the outer wall of the trumpet-shaped reduced-diameter hole body 3 is an inwardly concave arc wall, and a bentonite filler 4 is arranged in the rubber cylinder 2 with closed ends. The longitudinal spacing of the V-shaped water-permeable holes 2 evenly distributed on the wall of the rubber cylinder is 8-12mm, and the number of the V-shaped water-permeable holes 2 evenly distributed radially on the wall of the rubber cylinder is 6-10. The outer diameter of the rubber cylinder 1 is 30mm, and the wall thickness is 4mm. The diameter of the large end opening of the V-shaped water-permeable hole 2 is 4mm, and the diameter of the trumpet-shaped diameter-reducing hole body 3 connected to the small end opening is 0.5mm, and the length of the trumpet-shaped diameter-reducing hole body 3 extending out of the inner wall of the rubber cylinder is 5mm.

Claims

1. A bentonite-based rubber water stop device that swells when exposed to water, characterized by: The rubber cylinder (1) with closed ends has an outer diameter of 28-32 mm and a wall thickness of 3.5-4.5 mm. V-shaped water-permeable holes (2) are evenly arranged on the cylinder wall. The large end of the V-shaped water-permeable hole (2) faces outward, and the small end opening is connected to a trumpet-shaped reduced-diameter hole body (3) extending into the rubber cylinder. The trumpet-shaped reduced-diameter hole body (3) extends out of the inner wall of the rubber cylinder by a length of 4-6 mm. The large end opening diameter of the V-shaped water-permeable hole (2) is 3.5-4.5 mm. The diameter of the reduced-diameter hole of the trumpet-shaped reduced-diameter hole body (3) is 0.4-0.6 mm. The axial cross-section shape of the outer wall of the trumpet-shaped reduced-diameter hole body (3) is an inwardly concave arc wall. The rubber cylinder (1) with closed ends has a Bentonite filler (4); V-shaped water-permeable holes (2) are evenly arranged on the wall of the rubber cylinder with a longitudinal spacing of 8-12 mm, and the number of V-shaped water-permeable holes (2) evenly arranged radially on the wall of the rubber cylinder is 6-10; the V-shaped holes utilize the elastic deformation mechanism of rubber: when the external water pressure is relatively large, the elasticity of the V-shaped hole mouth becomes larger, and water can penetrate from the hole; when the internal water pressure is relatively large, the water-permeable holes are in an inverted V shape relative to the internal water-permeable holes, so that the pressure on the rubber water-permeable holes becomes smaller or even sealed under the water pressure, and it is difficult for water to seep out; the water-swelling material is a bentonite particle base material combined with clay particles to form a water-swelling filling material; the expansion rate after contacting water for 24 hours reaches 2-4 times.

2. A bentonite-based water-swellable rubber waterstop device according to claim 1, characterized in that: The outer diameter of the rubber cylinder (1) is 30 mm and the wall thickness is 4 mm.

3. The bentonite-based water-swellable rubber waterstop device according to claim 1, characterized in that: The diameter of the opening of the large end of the V-shaped water-permeable hole (2) is 4 mm, the diameter of the reduced diameter hole of the trumpet-shaped reduced diameter hole body (3) connected to the small end opening is 0.5 mm, and the length of the trumpet-shaped reduced diameter hole body (3) extending out of the inner wall of the rubber cylinder is 5 mm.

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