Double-sided water stop steel plate

Abstract

The utility model discloses a waterstop steel plate of double -sided waterstop belongs to waterstop steel plate technical field. Waterstop steel plate of double -sided waterstop is composed by waterstop main plate, first waterstop wing board and second waterstop wing board. Two first waterstop wing boards are equipped with, two first waterstop wing boards are located at the both ends of waterstop main plate, and two first waterstop wing boards are bent to the same side to form first waterstop surface. Two second waterstop wing boards are equipped with, two second waterstop wing boards are located at the both ends of waterstop main plate, and two second waterstop wing boards are bent to the same side to form second waterstop surface, and the bending direction of second waterstop wing board is opposite with the bending direction of first waterstop wing board, and second waterstop wing board and waterstop main plate and first waterstop wing board are X type structure. Waterstop steel plate of double -sided waterstop provided by the utility model can cope with bidirectional water pressure inside and outside structure simultaneously, prevents groundwater infiltration and sewage exosmosis, and the waterstop effect is strong, protects underground environment, and is suitable for complex waterproof scene.

Description

Technical Field

[0001] This utility model belongs to the technical field of water-stop steel plates, and particularly relates to a double-sided water-stop steel plate. Background Technology

[0002] Water-stop steel plates are mainly used at the joints of layered pouring in caissons or underground box structures of water plants. Their core function is to prevent groundwater from seeping into the main structure through the construction joints, and at the same time to prevent sewage from leaking into the surrounding soil through the construction joints.

[0003] Currently, most existing water-stop steel plates adopt a single-sided opening structure, with the opening facing the water-facing side to achieve one-way water stop. However, in scenarios such as sewage wells or underground tanks in sewage treatment plants, the inner side of the structure is sewage, and the outer side is groundwater, with the water level exhibiting seasonal dynamic changes: during the rainy season, the groundwater level is higher than the inner sewage level, and the outer water pressure dominates; during the dry season, the inner sewage level is higher than the outer groundwater level, and the inner sewage pressure becomes the main load. Under these conditions, if the opening of the water-stop steel plate faces outward, during the dry season, the sewage pressure on the inner side will cause sewage to seep out and pollute the surrounding soil; if the opening faces inward, during the rainy season, the groundwater pressure on the outer side will cause groundwater to seep into the structure, resulting in mixed rainwater and sewage flow.

[0004] Existing single-sided open water-stop steel plates cannot adapt to the above-mentioned bidirectional water pressure conditions, resulting in technical challenges such as sewage infiltration pollution or groundwater infiltration in different seasons. There is an urgent need for a water-stop structure design that can simultaneously cope with bidirectional water pressure. Utility Model Content

[0005] In view of the shortcomings of the related technologies, the purpose of this utility model is to provide a double-sided water-stopping steel plate to solve the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A double-sided water-stopping steel plate, comprising:

[0008] Water-stop mainboard;

[0009] The first water-stop wing plate is provided in two parts, which are located at both ends of the main water-stop plate. The two first water-stop wing plates are bent to the same side to form a first water-stop surface.

[0010] The second water-stop wing plate is provided in two parts, which are located at both ends of the main water-stop plate. The two second water-stop wing plates are bent to the same side to form a second water-stop surface. The bending direction of the second water-stop wing plate is opposite to that of the first water-stop wing plate. The second water-stop wing plate, the main water-stop plate, and the first water-stop wing plate form an X-shaped structure.

[0011] In some embodiments, the edges of the first and second water-stop wing plates are provided with serrated interlocking structures. The teeth of the serrated interlocking structures are right-angled triangles with a tooth height of 5-8 mm and a tooth spacing of 10-15 mm.

[0012] In some embodiments, the tips of the serrated interlocking structure face outwards from the main water-stop plate to disperse water pressure and extend the seepage path.

[0013] In some embodiments, the main water-stop plate, the first water-stop wing plate, and the second water-stop wing plate are all made of corrosion-resistant steel containing chromium and nickel alloys.

[0014] In some embodiments, the main water-stop plate is welded to the first water-stop wing plate and the second water-stop wing plate, and the weld width is no more than 0.5 mm.

[0015] In some embodiments, a metallurgical bonding layer is formed at the welded connection between the main water-stop plate and the first water-stop wing plate and the second water-stop wing plate. The metallurgical bonding layer contains alloying elements from the corrosion-resistant steel, and the intergranular corrosion resistance of the metallurgical bonding layer is not lower than that of the corrosion-resistant steel.

[0016] In some embodiments, a thickened portion is provided at the connection between the main water-stop plate and the first water-stop wing plate and the second water-stop wing plate, and the thickness of the thickened portion is increased by 20%-30%.

[0017] In some embodiments, the acute angle formed by the extension lines of the first and second water-stop wing plates is 60°-90°.

[0018] In some embodiments, the outer surfaces of both the first and second water-stop wing plates are provided with a zinc-chromium coating with a thickness of 8-12 μm.

[0019] In some embodiments, the first and second water-stop wing plates at one end of the main water-stop plate are provided with a groove structure, and the first and second water-stop wing plates at the other end of the main water-stop plate are provided with a tenon structure that matches the groove structure, so as to connect and combine multiple water-stop steel plates. The fitting gap between the groove structure and the tenon structure is no more than 0.3mm, and a water-swellable sealing strip is provided at the fitting point.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. The double-sided water-stopping steel plate provided by this utility model consists of a main water-stopping plate, a first water-stopping wing plate, and a second water-stopping wing plate. It adopts a bidirectional bending X-shaped structure. The first water-stopping wing plate and the second water-stopping wing plate are set in opposite directions to form a double-sided water-stopping surface. It can simultaneously cope with bidirectional water pressure inside and outside the structure, and solve the problem of water seepage and pollution of traditional single-sided water-stopping steel plates under different water level conditions in the rainy and dry seasons.

[0022] 2. In the double-sided water-stopping steel plate provided by this utility model, a right-angled triangular sawtooth interlocking structure is provided on the edge of the first water-stopping wing plate and the second water-stopping wing plate. The tooth height is 5-8mm, the tooth spacing is 10-15mm, and the tooth tip faces outward. This can enhance the mechanical interlocking with concrete, disperse water pressure, extend the seepage path, and improve the reliability of water-stopping. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a structural schematic diagram of one embodiment of the double-sided water-stopping steel plate of this utility model;

[0025] Figure 2 A schematic front view of one embodiment of the double-sided water-stopping steel plate of this utility model;

[0026] Figure 3 Right view of a structural schematic of an embodiment of the double-sided water-stopping steel plate of this utility model;

[0027] Figure 4 A top view illustrating the structure of one embodiment of the double-sided water-stopping steel plate of this utility model;

[0028] Figure 5 This is a schematic diagram of the serrated interlocking structure of one embodiment of the double-sided water-stopping steel plate of this utility model.

[0029] In the picture:

[0030] 1. Water-stop main plate; 2. First water-stop wing plate; 21. First water-stop surface; 3. Second water-stop wing plate; 31. Second water-stop surface; 4. Serrated interlocking structure. Detailed Implementation

[0031] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] See appendix Figures 1 to 5 This paper presents an illustrative embodiment of the double-sided water-stopping steel plate proposed in this utility model. The double-sided water-stopping steel plate includes a main water-stopping plate 1, a first water-stopping wing plate 2, and a second water-stopping wing plate 3.

[0035] Two first water-stop flanges 2 are provided, located at both ends of the main water-stop plate 1. The two first water-stop flanges 2 are bent to the same side to form a first water-stop surface 21. Two second water-stop flanges 3 are also provided, located at both ends of the main water-stop plate 1. The two second water-stop flanges 3 are bent to the same side to form a second water-stop surface 31. The bending direction of the second water-stop flanges 3 is opposite to that of the first water-stop flanges 2. The second water-stop flanges 3, the main water-stop plate 1, and the first water-stop flanges 2 form an X-shaped structure. This bidirectional bending X-shaped structure provides the water-stop steel plate with the mechanical basis to withstand bidirectional water pressure from both inside and outside the structure. From a structural design perspective, it overcomes the limitations of traditional single-sided water-stopping, simultaneously preventing groundwater infiltration and sewage seepage, thus resolving the conflict between rainy and dry season conditions.

[0036] Both the first water-stop wing plate 2 and the second water-stop wing plate 3 have serrated interlocking structures 4 on their edges. The teeth of the serrated interlocking structure 4 are right-angled triangles with a tooth height of 5-8 mm and a tooth spacing of 10-15 mm. In this embodiment, the serrated interlocking structure 4 is formed in one piece by a precision stamping die, with the hypotenuse of the right-angled triangle teeth tangent to the edge of the wing plate. During concrete pouring, the serrations embed into the concrete to form an interlocking mechanical interlocking structure. The serrated interlocking structure 4 forms a high-strength mechanical interlock with the concrete, significantly improving the anchoring force compared to traditional smooth edges, effectively preventing water leakage along the interface between the steel plate and the concrete, extending the seepage path, and improving the reliability of the water-stopping system.

[0037] The serrated interlocking structure 4 has its tooth tips facing outwards from the main water-stop plate 1 to disperse water pressure and extend the seepage path. With the tooth tips facing outwards from the main water-stop plate 1, i.e. away from the structural center, when water pressure acts on the flange, the tooth tips form a load-dispersing guiding structure. As the water pressure is transmitted to the concrete through the tooth tips, a radial component force is generated, promoting a tighter fit between the serrations and the concrete. The outward-facing tooth tip design converts water pressure into a positive pressure that enhances the interlocking, not only dispersing local water pressure but also dynamically strengthening the water-stopping effect, avoiding the risk of leakage due to water pressure fluctuations, and is especially suitable for working conditions with frequent water pressure changes.

[0038] The main water-stop plate 1, the first water-stop flange 2, and the second water-stop flange 3 are all made of corrosion-resistant steel containing chromium and nickel alloys. In this embodiment, the chromium content in the corrosion-resistant steel is 12-15% by mass, the nickel content is 8-10%, and trace amounts of molybdenum are added to enhance resistance to intergranular corrosion. The steel is quenched at 850-900℃ and tempered at 600℃ to form a uniform tempered sorbite structure, possessing both high strength and toughness. The combination of alloy composition and heat treatment process enables the water-stop steel plate to maintain long-term stable mechanical properties in the highly corrosive environment of sewage and groundwater, avoiding structural failure caused by material corrosion and extending the service life of the project.

[0039] The main water-stop plate 1 is welded to the first water-stop flange 2 and the second water-stop flange 3, with a weld width not exceeding 0.5 mm. In this embodiment, pulsed laser welding technology is used, controlling the laser power density at 10^5-10^6 W / cm² and the welding speed at 5-10 mm / s to form a narrow and deep weld. The weld area is subjected to non-destructive testing (such as X-ray inspection) to ensure the absence of defects such as porosity and cracks, and the weld metal achieves metallurgical bonding with the base material. The narrow weld of no more than 0.5 mm formed by laser welding can reduce the damage to the steel properties caused by the heat-affected zone, and the weld strength is basically consistent with that of the base material, avoiding the stress concentration problem of traditional welding processes and improving the overall reliability of the water-stop steel plate structure.

[0040] A metallurgical bonding layer is formed at the welded joints of the main water-stop plate 1 with the first water-stop flange 2 and the second water-stop flange 3. This metallurgical bonding layer contains alloying elements found in the corrosion-resistant steel, and its resistance to intergranular corrosion is no less than that of the corrosion-resistant steel itself. During welding, the chromium and nickel alloying elements in the base material form a uniform metallurgical bonding layer with the filler metal at high temperatures. The thickness of the bonding layer is measured by electron probe microanalysis (EPMA), with an alloying element distribution gradient ≤5% / μm. Its resistance to intergranular corrosion is verified by the 65% nitric acid corrosion test according to GB / T4334 standard. The metallurgical bonding layer maintains the corrosion-resistant properties of the base material, preventing the welded joint from becoming a weak point in corrosion resistance. This ensures that the water-stop steel plate has no risk of leakage at the welded joints during long-term service, achieving consistent corrosion resistance throughout the entire structure.

[0041] A thickened section is provided at the connection between the main water-stop plate 1 and the first water-stop flange 2 and the second water-stop flange 3, with the thickness of the thickened section increased by 20%-30%. The thickened section is achieved through a local hot rolling process, and a gradual thickening is adopted at the connection between the main water-stop plate 1 and the flange. For example, when the main body of the plate is 3mm thick, the length of the thickened area is set to 50-80mm, and the thickness gradually increases to 3.6-3.9mm. In addition, a transition fillet radius of not less than 5mm can be used to eliminate stress concentration. The thickened section enhances the structural strength of the stress concentration area, effectively resists the bending stress caused by water pressure, avoids fatigue cracks at the connection due to long-term stress, and improves the deformation resistance of the water-stop steel plate.

[0042] The acute angle formed by the extension lines of the first water-stop wing plate 2 and the second water-stop wing plate 3 is 60°-90°. The specific angle is adjusted according to the actual water pressure conditions to achieve the optimal water-stopping performance.

[0043] The outer surfaces of both the first and second waterstop flanges 2 and 3 are coated with a zinc-chromium coating with a thickness of 8-12 μm. The zinc-chromium coating utilizes a chromium-free passivation technology, forming a dense 8-12 μm film on the flange surface through electrochemical deposition. This film is composed of nano-sized zinc flakes and a silane coupling agent. After a 1000-hour neutral salt spray test (NSS), no red rust was observed on the film. The zinc-chromium coating provides additional surface protection for the flanges, isolating them from corrosive media such as sewage and groundwater. Combined with the corrosion resistance of the base material, it forms a dual protection system, further extending the corrosion resistance life of the waterstop steel plates and reducing maintenance costs.

[0044] The first water-stop wing plate 2 and the second water-stop wing plate 3 located at one end of the main water-stop plate 1 are provided with a groove structure, and the first water-stop wing plate 2 and the second water-stop wing plate 3 located at the other end of the main water-stop plate 1 are provided with a tenon structure that matches the groove structure, so as to connect and combine multiple water-stop steel plates. The fitting gap between the groove structure and the tenon structure is no more than 0.3mm, and a water-swellable sealing strip is provided at the fitting point.

[0045] In this embodiment, the groove structure is selected as a U-shaped groove, and the width of the groove structure is slightly larger than the width of the tenon structure. The tenon structure is selected as a trapezoidal structure, and the mating surface has a certain degree of roughness. During fitting, water-swellable sealing strips are first applied, and then pre-tightening force is applied using a special clamp to ensure that the fitting gap meets the requirements. Through the combination design of groove-tenon and sealing strip, multiple water-stop steel plates can be precisely spliced ​​to form a continuous and leak-free waterproof interface, solving the leakage risks of traditional welding splicing in long-distance projects and improving the reliability of the overall waterproof system.

[0046] In the above illustrative embodiment, the double-sided water-stopping steel plate is composed of a main water-stopping plate, a first water-stopping wing plate, and a second water-stopping wing plate. It adopts a bidirectional bending X-shaped structure. The first water-stopping wing plate and the second water-stopping wing plate are set in opposite directions to form a double-sided water-stopping surface. It can simultaneously cope with bidirectional water pressure inside and outside the structure, and solve the problem of water seepage and pollution of traditional single-sided water-stopping steel plates under different water level conditions in the rainy and dry seasons.

[0047] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0048] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A double-sided water-stopping steel plate, characterized in that, include: Water-stop mainboard; The first water-stop wing plate is provided in two parts, which are located at both ends of the main water-stop plate. The two first water-stop wing plates are bent to the same side to form a first water-stop surface. The second water-stop wing plate is provided in two parts, which are located at both ends of the main water-stop plate. The two second water-stop wing plates are bent to the same side to form a second water-stop surface. The bending direction of the second water-stop wing plate is opposite to that of the first water-stop wing plate. The second water-stop wing plate, the main water-stop plate, and the first water-stop wing plate form an X-shaped structure.

2. The double-sided water-stopping steel plate according to claim 1, characterized in that, The edges of the first and second water-stop wing plates are provided with serrated interlocking structures. The teeth of the serrated interlocking structures are right-angled triangles with a tooth height of 5-8 mm and a tooth spacing of 10-15 mm.

3. The double-sided water-stopping steel plate according to claim 2, characterized in that, The tips of the serrated interlocking structure face outwards from the main water-stop plate to disperse water pressure and extend the seepage path.

4. The double-sided water-stopping steel plate according to claim 1, characterized in that, The main water-stop plate, the first water-stop wing plate, and the second water-stop wing plate are all made of corrosion-resistant steel containing chromium and nickel alloys.

5. The double-sided water-stopping steel plate according to claim 4, characterized in that, The main water-stop plate is welded to the first water-stop wing plate and the second water-stop wing plate, and the weld width is no more than 0.5mm.

6. The double-sided water-stopping steel plate according to claim 5, characterized in that, A metallurgical bonding layer is formed at the welded connection between the main water-stop plate and the first and second water-stop wing plates. The metallurgical bonding layer contains alloying elements from the corrosion-resistant steel, and the intergranular corrosion resistance of the metallurgical bonding layer is no less than that of the corrosion-resistant steel.

7. The double-sided water-stopping steel plate according to claim 1, characterized in that, The connection between the main water-stop plate and the first and second water-stop wing plates is provided with a thickened portion, and the thickness of the thickened portion is increased by 20%-30%.

8. The double-sided water-stopping steel plate according to claim 1, characterized in that, The acute angle formed by the extension lines of the first and second water-stop wing plates is 60°-90°.

9. The double-sided water-stopping steel plate according to claim 1, characterized in that, The outer surfaces of both the first and second water-stop wing plates are coated with a zinc-chromium coating with a thickness of 8-12 μm.

10. The double-sided water-stopping steel plate according to claim 1, characterized in that, The first and second water-stop wing plates located at one end of the main water-stop plate are provided with groove structures, and the first and second water-stop wing plates located at the other end of the main water-stop plate are provided with tenon structures that match the groove structures, so as to connect and combine multiple water-stop steel plates. The fitting gap between the groove structure and the tenon structure is no more than 0.3mm, and a water-swellable sealing strip is provided at the fitting point.

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