Three-section type water stop screw

Abstract

The utility model discloses a three-section type water stop screw rod, relates to the technical field of building construction, and aims to solve the problem that the existing water stop screw rod is poor in waterproof effect and easy to cause hidden danger of leakage. The three-section type water stop screw comprises a water stop rod, a water stop piece and two fastening rods. Wherein threads are arranged on a rod body of the water stop rod, and the water stop rod is used for being arranged in the pouring cavity in a penetrating mode; the water stop piece is fixedly arranged on a rod body of the water stop rod. The two fastening rods are connected to the two ends of the water stop rod through connecting parts correspondingly, each connecting part comprises an abutting sealing face and a connecting channel, the end face area of each abutting sealing face is larger than the cross sectional area of a through hole of a formwork, and the abutting sealing faces are used for abutting against the inner surface of the formwork in a sealing mode; the cross sectional area of the connecting channel is smaller than the end face area of the abutting sealing face, and the connecting channel is detachably connected with the fastening rod.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a three-section water-stop screw. Background Technology

[0002] In construction engineering, water-stop tie rods are key connecting components in concrete wall pouring. Their core function is to fix the formwork spacing and prevent concrete leakage through the rod structure penetrating the formwork. Traditional three-section water-stop tie rods consist of a central water-stop rod and two detachable tie rods at both ends, and are widely used due to their reusability. However, in the design of existing three-section water-stop tie rods, during concrete pouring, water easily forms a penetration path along the contact surface between the rod and the concrete, resulting in poor waterproofing performance. This makes it difficult to effectively prevent water from entering the wall, creating a potential leakage hazard. Poor waterproofing further leads to water intrusion into the wall, reducing its structural performance. Utility Model Content

[0003] The purpose of this utility model is to provide a three-section water-stop screw rod, which improves the waterproof effect of the three-section water-stop screw rod, prevents water from entering the interior of the wall, and thus enhances the structural stability of the wall.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A three-section water-stop screw rod, comprising:

[0006] Waterstop rod, the waterstop rod has threads on its body, and the waterstop rod is used to pass through the casting cavity;

[0007] Waterstop plate, the waterstop plate is fixed on the rod body of the waterstop rod;

[0008] Two fastening rods are respectively connected to both ends of the waterstop rod via connecting parts; wherein, the connecting parts include:

[0009] The sealing surface is used to seal the inner surface of the template.

[0010] The connecting channel has a cross-sectional area smaller than the end face area of ​​the sealing surface, and the connecting channel is detachably connected to the fastening rod.

[0011] Optionally, in the above-mentioned three-section water-stop screw, the connecting part is integrally formed with the water-stop rod.

[0012] Optionally, in the above-mentioned three-section water-stop screw, the connecting part includes a conical nut, the abutting sealing surface is the large end face of the conical nut, the connecting channel is the axial threaded hole of the conical nut, the small end of the conical nut is connected to one end of the water-stop rod, the large end face of the conical nut is used to seal and fit against the inner surface of the template, and one end of the fastening rod is provided with an external thread and passes through the template to be threadedly connected to the conical nut.

[0013] Optionally, in the above-mentioned three-section water-stop screw rod, the three-section water-stop screw rod further includes a U-shaped clip and a fastening nut. The U-shaped clip and the fastening nut are sequentially sleeved on the end of the fastening rod away from the water-stop rod. The fastening nut is threadedly connected to the fastening rod. The fastening nut is used to press the U-shaped clip against the outer surface of the template.

[0014] Optionally, in the above-mentioned three-section water-stop screw, the direction of the thread at the end of the fastening rod away from the water-stop rod is opposite to the direction of the external thread at the end of the fastening rod near the water-stop rod.

[0015] Optionally, in the above-mentioned three-section water-stop screw, the water-stop plate includes:

[0016] An annular plate, which is welded to the body of the waterstop rod along the circumference of the rod.

[0017] An edge anti-seepage portion is fixed to the outer edge of the annular sheet, and the cross-section of the edge anti-seepage portion extends and bends along the axial direction of the water-stop rod.

[0018] Optionally, in the above-mentioned three-section water-stop screw, the water-stop plate is fixed in the middle of the rod body of the water-stop rod.

[0019] Optionally, in the above-mentioned three-section water-stop screw rod, the three-section water-stop screw rod further includes two expansion water-stop washers, the expansion water-stop washers are fixed on the rod body of the water-stop rod, and the two expansion water-stop washers are symmetrically distributed on both sides of the water-stop plate.

[0020] Optionally, in the above-mentioned three-section water-stop screw, the space between the water-stop plate and the expansion water-stop washer is filled with waterproof material.

[0021] Optionally, in the above-mentioned three-section water-stop screw, both the surface of the water-stop rod and the water-stop sheet have a waterproof coating.

[0022] Compared with existing technologies, the three-section water-stop screw provided by this utility model has threads on its body and a water-stop plate on its body. Two fastening rods are connected to both ends of the water-stop screw through connecting parts. The connecting parts include an abutting sealing surface and a connecting channel. The abutting sealing surface is used to tightly fit the inner surface of the template to form a seal. The cross-sectional area of ​​the connecting channel is smaller than that of the abutting sealing surface and is detachably connected to the fastening rod. During operation, the water-stop screw passes through the casting cavity formed by the template. The threaded structure on its surface differs from the traditional smooth screw, which only forms a straight seepage path. The continuous spiral design of the threads allows water to seep along the surface of the screw in a multi-directional tortuous path, extending the seepage path and increasing the seepage resistance, thus weakening the seepage force of the water flow. At the same time, the water-stop plate is set on the screw, and its diameter is larger than that of the screw, which can effectively block the seepage path of the water flow along the axial direction of the screw, further enhancing the seepage prevention effect. By combining the water-stop plate with the threaded rod, the risk of leakage during concrete pouring is reduced, the waterproofing performance of the wall is improved, the structural strength of the wall is prevented from decreasing due to water intrusion, and the overall stability of the wall is ensured. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, 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 schematic diagram of the overall structure of a three-section water-stop screw provided for an embodiment of the present utility model.

[0025] Figure label:

[0026] 1 is a water-stopping rod, 2 is a water-stopping plate, 3 is a fastening rod, 4 is a tapered nut, 5 is a mountain-shaped clip, 6 is a fastening nut, and 7 is an expansion water-stopping washer. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0030] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., 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.

[0031] 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Please see Figure 1 The three-section water-stop screw provided in this embodiment includes a water-stop rod 1, a water-stop plate 2, and two fastening rods 3. The water-stop rod 1 has threads on its body and is used to pass through the casting cavity. The water-stop plate 2 is fixed to the body of the water-stop rod 1. The two fastening rods 3 are respectively connected to the two ends of the water-stop rod 1 through a connecting part. The connecting part includes an abutting sealing surface and a connecting channel. The abutting sealing surface is used to seal against the inner surface of the template. The cross-sectional area of ​​the connecting channel is smaller than the end face area of ​​the abutting sealing surface. The connecting channel is detachably connected to the fastening rod 3.

[0033] Compared with existing technologies, the three-section water-stop screw provided by this utility model has threads on the body of the water-stop rod 1 and a water-stop plate 2. Two fastening rods 3 are connected to both ends of the water-stop rod 1 through connecting parts. The connecting parts include an abutting sealing surface and a connecting channel. The abutting sealing surface is used to tightly fit the inner surface of the template to form a seal. The cross-sectional area of ​​the connecting channel is smaller than that of the abutting sealing surface and is detachably connected to the fastening rods 3. During operation, the water-stop rod 1 is inserted into the casting cavity formed by the template. The threaded structure on the surface of the rod differs from the traditional smooth rod, which only forms a straight seepage path. The continuous spiral design of the threads allows water to seep along the surface of the rod in a multi-directional tortuous path, extending the seepage path and increasing the seepage resistance, thus weakening the seepage force of the water flow. At the same time, the water-stop plate 2 is set on the rod, and its diameter is larger than that of the rod, which can effectively block the seepage path of the water flow along the axial direction of the rod, further enhancing the seepage prevention effect. By combining the waterstop plate 2 with the thread on the rod, the risk of leakage during concrete pouring is reduced, the waterproofing performance of the wall is improved, the structural strength of the wall is prevented from decreasing due to water intrusion, and the overall stability of the wall is ensured.

[0034] As one possible implementation, the connecting part and the waterstop rod 1 are integrally formed. The abutting sealing surface of the connecting part is used to tightly fit the inner surface of the template during installation, serving a sealing function, while the connecting channel is used for detachable connection with the fastening rod 3. In actual construction, this integrally formed structure eliminates assembly gaps between the waterstop rod 1 and the connecting part, avoiding the risk of leakage due to gaps during concrete pouring. This design enhances the overall stability and sealing of the waterstop rod structure, significantly reducing the risk of water seepage compared to later assembly methods, thereby improving the waterproof performance of the wall. In practical applications, integral forming can be achieved by using injection molding, where the connecting part and the waterstop rod 1 are injection molded into a single unit during manufacturing; or by using forging, where the raw materials are heated to a suitable temperature and then forged using a mold to create an integral structure of the connecting part and the waterstop rod 1. Both processes ensure a tight bond between the connecting part and the waterstop rod 1, improving the overall performance of the waterstop rod.

[0035] As one possible implementation, such as Figure 1 As shown, the connecting part includes a conical nut 4, the sealing surface is the large end face of the conical nut 4, the connecting channel is the axial threaded hole of the conical nut 4, the small end of the conical nut 4 is connected to one end of the water-stop rod 1, the large end face of the conical nut 4 is used to seal and fit against the inner surface of the template, and one end of the fastening rod 3 is provided with an external thread and passes through the template to be threadedly connected to the conical nut 4.

[0036] Specifically, the water-stop rod 1, as the main part that penetrates the casting cavity, has one end connected to the small end of the conical nut 4, while the large end face of the conical nut 4 abuts against the sealing surface. Its area is larger than the cross-sectional area of ​​the template through hole, and it can fit tightly against the inner surface of the template. The axial threaded hole serves as a connection channel and is threadedly connected to the fastening rod 3, which passes through the template and has external threads.

[0037] In practice: When grouting begins, concrete is injected into the pouring cavity formed by the formwork and waterstop rod 1, and the internal pressure gradually increases. At this time, the large end face of the conical nut 4 tightly fits the inner surface of the formwork, effectively preventing concrete grout from leaking from the contact gap between the formwork and the waterstop rod by utilizing its large contact area and good fit. Simultaneously, the threaded connection between the fastening rod 3 and the conical nut 4 plays a role, firmly fixing the formwork to the waterstop rod 1, allowing the entire structure to withstand the pressure generated during grouting and ensuring that the formwork will not shift or deform due to pressure, thus ensuring the quality of the wall pouring. When the formwork needs to be dismantled after construction, the fastening rod 3 can be unscrewed from the axial threaded hole of the conical nut 4. Due to the detachable nature of the threaded connection, a simple rotation operation is sufficient to disengage the connection between the fastening rod 3 and the conical nut 4. Thus, the fixing relationship between the formwork and the waterstop rod 1 is released, and the formwork can be easily removed, preparing for subsequent construction steps.

[0038] With this setup, during installation, simply pass the fastening rod 3 through the template and tighten it onto the conical nut 4; during disassembly, simply unscrew the fastening rod 3 in reverse to easily remove the template, greatly improving construction efficiency. In terms of waterproofing and leak prevention, the tight seal of the large end faces of the conical nut 4 and the tightness of the threaded connection significantly reduce the risk of grout leakage, ensuring the waterproof performance of the wall and preventing wall quality problems caused by leakage, thereby extending the wall's service life. Furthermore, its stable structure reduces damage to the template during construction, lowering the template wear rate and saving construction costs.

[0039] In some embodiments, an elastic sealing protrusion structure can be designed on the large end face of the tapered nut 4. When the large end face is in contact with the inner surface of the template, the sealing protrusion structure will deform to a certain extent, further filling any possible tiny gaps, thereby enhancing the sealing effect. The sealing protrusion structure can be a rubber ring or the like fixed on the large end face of the tapered nut 4.

[0040] In some embodiments, the connecting part can also be a sleeve structure, with the sleeve fixedly connected to both ends of the water-stop rod 1. One end of the sleeve forms an abutment sealing surface, and the end face area of ​​this abutment sealing surface is larger than the cross-sectional area of ​​the template through hole, for sealing and fitting against the inner surface of the template. This end is provided with a connecting channel, which can be a threaded hole or a blind hole, and is connected to the fastening rod 3 passing through the template by thread or by plug-in. After the fastening rod 3 is inserted into the connecting channel of the sleeve, a detachable connection is achieved by thread or plug-in. When the fastening rod 3 is connected to the sleeve by plug-in, the plug-in connection is easier to install and disassemble quickly than the threaded connection, which can shorten the construction time and is suitable for narrow construction spaces where threaded connections are inconvenient. In addition, the sleeve itself can be made of elastic material or designed with elastic edges to further improve the sealing performance and reduce the risk of leakage. When using the above-mentioned connection part as a sleeve, an annular groove can be added to the abutting sealing surface of the sleeve, and a rubber sealing ring is embedded in the annular groove to improve the sealing effect. In addition, the insertion end of the fastening rod 3 and the sleeve is designed as a dovetail structure, which, together with the spring buckle, enables quick connection and disassembly, further ensuring that the connection is stable and the assembly and disassembly are convenient during the construction process.

[0041] As one possible implementation, such as Figure 1 As shown, the three-section water-stop screw also includes a mountain-shaped clip 5 and a fastening nut 6. The mountain-shaped clip 5 and the fastening nut 6 are sequentially sleeved on the end of the fastening rod 3 away from the water-stop rod 1. The fastening nut 6 is threadedly connected to the fastening rod 3. The fastening nut 6 is used to press the mountain-shaped clip 5 against the outer surface of the template.

[0042] The U-shaped clamp 5, by being sleeved on the fastening rod 3 and engaging with the fastening nut 6, forms a stable clamping structure for the formwork. When pouring concrete, the convex surface of the U-shaped clamp 5 contacts the formwork. After tightening the fastening nut 6, the convex surface of the U-shaped clamp 5 fits tightly against the outer surface of the formwork. The axial tension of the fastening rod 3 fixes the formwork on both sides, preventing bulging or displacement during the pouring process.

[0043] In practice, firstly, the U-shaped clip 5 is fitted onto the outer end of the fastening rod 3, and then the fastening nut 6 is screwed in and manually pre-tightened, resulting in an integrated structure of the U-shaped clip 5, fastening nut 6, and fastening rod 3. Next, the waterstop rod 1 is positioned between the two side templates, and the fastening rod 3 is screwed into the conical nuts 4 at both ends of the waterstop rod 1. After the waterstop rod 1 is positioned between the two side templates and the templates are adjusted into place, the fastening nuts 6 are further tightened, causing the U-shaped clip 5 to undergo elastic deformation and evenly transmit pressure to the template surface, ensuring the flatness and sealing of the template. When disassembling after the concrete has solidified, the fastening rod 3 is unscrewed from the conical nuts 4 of the waterstop rod 1, completing the entire disassembly process.

[0044] By using the combination structure of the U-shaped clamp 5 and the fastening nut 6, the two opposing templates can be stably fixed, resulting in a stable concrete pouring cavity and improving construction quality. Simultaneously, the convex design of the U-shaped clamp 5 contacts the template, dispersing the localized pressure of the fastening nut 6 and preventing damage to the template due to excessive stress at a single point. This detachable structure allows for the reuse of all components of the water-stop bolt, reducing construction costs.

[0045] Furthermore, the direction of the thread at the end of the fastening rod 3 furthest from the waterstop rod 1 is opposite to the direction of the external thread at the end of the fastening rod 3 closest to the waterstop rod 1.

[0046] like Figure 1 As shown, one end of the fastening rod 3 has an external thread for screwing into the conical nut 4, while the other end has a reverse thread with the opposite direction of rotation. During disassembly, the reverse thread design allows the fastening rod 3 to disengage from the conical nut 4 by rotating in the opposite direction, avoiding the phenomenon of tightening further due to the same thread direction. In practice, the fastening nut 6 is first tightened so that it abuts against the template through the U-shaped clip 5. Then, the fastening nut 6 is further tightened. Since the U-shaped clip 5 abuts against the template, when the fastening nut 6 is further tightened in the direction towards the template, the space of the nut is restricted and cannot move. Therefore, the rotational force of the nut drives the fastening rod 3, which is threadedly connected to it, to rotate. The rotation direction of the fastening rod 3 is determined by the direction of rotation of the reverse nut. Since the external thread of the end of the fastening rod 3 that is threaded to the conical nut 4 is opposite to the direction of rotation of the reverse nut, when the fastening rod 3 rotates in this direction, one end of the fastening rod 3 will disengage from the threaded connection with the conical nut 4. Then, as the fastening nut 6 is further tightened, the fastening rod 3 will disengage from the template, thus completing the disassembly of the detachable component.

[0047] This design makes the disassembly process more efficient and reliable, avoiding the inconsistencies caused by threads with the same direction of rotation. Meanwhile, the use of the U-shaped clip 5 and the fastening nut 6 simplifies the disassembly operation, allowing the structure to be disassembled without complex tools, reducing operational difficulty and cost. For example, disassembly can be completed using only a power drill.

[0048] As one possible implementation, the waterstop 2 includes an annular plate and an edge anti-seepage portion; wherein, the annular plate is welded to the rod of the waterstop rod 1 circumferentially; the edge anti-seepage portion is fixed to the outer edge of the annular plate, and the cross-section of the edge anti-seepage portion extends axially along the rod of the waterstop rod 1.

[0049] Specifically, the annular plate is welded and fixed around the perimeter of the waterstop rod 1, and the edge anti-seepage part is fixed to the outer edge of the annular plate and extends towards the water-facing side to form a corrugated structure. This design can increase the contact area between the waterstop plate 2 and the water flow, extend the seepage path of the water flow at the waterstop plate 2, and make the water flow form vortices at the corrugated structure and consume kinetic energy, thereby reducing the seepage pressure.

[0050] Furthermore, the waterstop 2 is fixed to the center of the waterstop rod 1. Specifically, the waterstop rod 1, as the main structure penetrating the template, has its center corresponding to the geometric center of the wall thickness, and the waterstop 2 is set here by welding or other fixing methods. This arrangement ensures the symmetrical distribution of the waterstop 2 in the wall, improves the overall balance of waterproof performance, and the standardized installation position facilitates quick positioning, reducing the problem of waterstop 2 offset due to human error.

[0051] As one possible implementation, the three-section water-stop tie rod also includes two expansion water-stop washers 7. The expansion water-stop washers 7 are fixed to the body of the water-stop rod 1, and the two expansion water-stop washers 7 are symmetrically distributed on both sides of the water-stop plate 2. The expansion water-stop washers 7 are made of water-swellable material. When the concrete comes into contact with water during pouring, the washers expand and tightly fill the space between the water-stop rod 1 and the formwork, forming an additional seepage barrier. In practical implementation, the expansion water-stop washers 7 are used in conjunction with the water-stop plate 2 to further enhance the overall seepage prevention performance of the water-stop tie rod. The symmetrical distribution design of the expansion water-stop washers 7 ensures uniform seepage prevention on both sides of the water-stop rod 1, effectively preventing water from seeping in from either side. This design not only improves the seepage prevention reliability of the water-stop tie rod but also simplifies the construction process and reduces subsequent maintenance costs caused by leakage.

[0052] Furthermore, a waterproof material is filled between the waterstop 2 and the expansion waterstop washer 7. This waterproof material further enhances the overall seepage prevention performance of the waterstop bolt. The waterproof material can be a highly elastic, corrosion-resistant sealant or waterproof mortar, filled into the gap between the waterstop 2 and the expansion waterstop washer 7 to form a continuous seepage-proof layer. In practice, the waterproof material effectively fills the tiny gaps between the waterstop 2 and the expansion waterstop washer 7, preventing moisture from seeping through weak points in the seepage prevention system. Simultaneously, the high elasticity of the waterproof material allows it to adapt to shrinkage and deformation during concrete pouring, ensuring the long-term stability of the seepage prevention effect. This design improves the seepage prevention reliability of the waterstop bolt.

[0053] As one possible implementation, both the waterstop rod 1 and the waterstop plate 2 have a waterproof coating on their surfaces. By designing a waterproof coating on the surfaces of the waterstop rod 1 and the waterstop plate 2, the overall seepage prevention performance of the waterstop bolt is further improved. The waterproof coating uses a corrosion-resistant and highly adhesive waterproof material, applied to the surfaces of the waterstop rod 1 and the waterstop plate 2 to form a seepage-proof protective layer. The waterproof coating effectively blocks direct contact between moisture and the metal surface, preventing performance degradation due to corrosion or leakage. Simultaneously, the high adhesion of the waterproof coating ensures that it will not peel off or be damaged during concrete pouring, maintaining a long-term seepage prevention effect. This design not only enhances the seepage prevention reliability of the waterstop bolt but also extends its service life and reduces later maintenance costs. Furthermore, a wear-resistant layer can be added to the outside of the waterproof coating to improve its wear resistance and further enhance its seepage prevention effect.

[0054] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0055] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A three-section water-stop screw, characterized in that, include: A water-stop rod, the body of which is threaded, is used to pass through the casting cavity; A waterstop plate, which is fixed to the body of the waterstop rod; Two fastening rods are respectively connected to both ends of the water-stop rod via connecting parts; wherein, the connecting parts include: Abutting sealing surface, wherein the abutting sealing surface is used to seal against the inner surface of the template; A connecting channel, the cross-sectional area of ​​which is smaller than the end face area of ​​the abutting sealing surface, and the connecting channel is detachably connected to the fastening rod.

2. The three-section water-stop screw according to claim 1, characterized in that, The connecting part is integrally formed with the water-stop rod.

3. The three-section water-stop screw according to claim 1, characterized in that, The connecting part includes a conical nut, the abutting sealing surface is the large end face of the conical nut, the connecting channel is the axial threaded hole of the conical nut, the small end of the conical nut is connected to one end of the water-stop rod, the large end face of the conical nut is used to seal and fit against the inner surface of the template, and one end of the fastening rod is provided with an external thread and passes through the template to be threadedly connected to the conical nut.

4. The three-section water-stop screw according to claim 3, characterized in that, The three-section water-stop screw also includes a U-shaped clip and a fastening nut. The U-shaped clip and the fastening nut are sequentially sleeved on the end of the fastening rod away from the water-stop rod. The fastening nut is threadedly connected to the fastening rod and is used to press the U-shaped clip against the outer surface of the template.

5. The three-section water-stop screw according to claim 4, characterized in that, The direction of the thread at the end of the fastening rod furthest from the waterstop rod is opposite to the direction of the external thread at the end of the fastening rod closest to the waterstop rod.

6. The three-section water-stop screw according to claim 1, characterized in that, The water-stopping plate includes: An annular plate, which is welded to the body of the waterstop rod along the circumference of the rod. An edge anti-seepage portion is fixed to the outer edge of the annular sheet, and the cross-section of the edge anti-seepage portion extends and bends along the axial direction of the water-stop rod.

7. The three-section water-stop screw according to claim 1, characterized in that, The water-stop plate is fixed to the center of the water-stop rod.

8. The three-section water-stop screw according to claim 1, characterized in that, The three-section water-stop screw also includes two expansion water-stop washers, which are fixed on the rod body of the water-stop rod and are symmetrically distributed on both sides of the water-stop plate.

9. The three-section water-stop screw according to claim 8, characterized in that, Waterproof material is filled between the water-stop sheet and the expansion water-stop gasket.

10. The three-section water-stop screw according to claim 1, characterized in that, Both the water-stop rod and the water-stop sheet have a waterproof coating on their surfaces.

Images