Plugging structure for reserved rib penetrating hole of steel formwork

Abstract

The utility model provides a plugging structure for a reserved rebar penetrating hole of a steel formwork. The plugging structure comprises a magnetic ring, a flexible plugging plate and the steel formwork which are sequentially connected in series through rebars. The inner diameter of the magnetic ring is greater than the outer diameter of the steel bar; the flexible plugging plate is circular and is provided with a first through hole, and the inner diameter of the first through hole is smaller than the outer diameter of the steel bar; and a second through hole matched with the outer diameter of the reinforcing steel bar is formed in the steel template. While it is ensured that the steel formwork is convenient to disassemble, concrete slurry can be prevented from flowing out of the second through holes in the steel formwork, and therefore the stability of the box girder prefabrication process and the stability of a box girder finished product obtained through prefabrication are ensured.

Description

Technical Field

[0001] This application relates to the technical field of bridges, and particularly relates to a plugging structure for reserved steel bar passing holes in steel formwork. Background Art

[0002] A box girder is a type of beam in bridge engineering. It is hollow inside and has flanges on both upper sides, similar to a box. Due to its excellent dynamic performance, large torsional stiffness, good integrity, and strong applicability, it can be used in both straight and curved sections, which makes the box girder widely used in bridge design.

[0003] The box girder is formed by casting reinforced concrete. Specifically, first, a steel bar framework is erected, and an inner formwork or core mold is installed on the steel bar framework to form the internal space of the box girder. Then, concrete slurry is poured into the internal space. After processes such as standing, forming, and curing, the formwork can be removed to obtain a precast box girder. During the precast process of the above box girder, in order to ensure the stability and tightness of the inner formwork or core mold, a side formwork is installed on the outside of the inner formwork or core mold. And the installation of the inner formwork or core mold and the side formwork on the steel bar framework both require the opening of steel bar passing holes. If the steel bar passing holes are opened too small, it will be difficult to disassemble the inner formwork or core mold and the side formwork from the steel bar framework. On the contrary, if the steel bar passing holes are opened too large, it may cause the concrete slurry poured into the internal space to flow out from the steel bar passing holes on the inner formwork or core mold and the side formwork, resulting in serious leakage of slurry. Summary of the Utility Model

[0004] This application provides a plugging structure for reserved steel bar passing holes in steel formwork to solve the technical problems described in the above background art.

[0005] To solve the above technical problems, this application is implemented by adopting the following technical solutions:

[0006] This application provides a plugging structure for reserved steel bar passing holes in steel formwork, including: a magnetic ring, a flexible plugging plate, and a steel formwork that are sequentially connected in series by steel bars;

[0007] The inner diameter of the magnetic ring is greater than the outer diameter of the steel bar;

[0008] The flexible plugging plate is circular and has a first through hole opened thereon, and the inner diameter of the first through hole is smaller than the outer diameter of the steel bar;

[0009] A steel formwork, and the steel formwork is provided with a second through hole that matches the outer diameter of the steel bar.

[0010] Optionally, it further includes an annular plate whose inner diameter matches the outer diameter of the flexible plugging plate;

[0011] The outer diameter of the magnetic ring is greater than the outer diameter of the flexible sealing plate. The annular plate is sleeved outside the flexible sealing plate and its thickness is less than or equal to the thickness of the flexible sealing plate. Two handles are oppositely arranged on the outer peripheral wall of the annular plate;

[0012] Both the annular plate and the handles are made of 304 stainless steel.

[0013] Optionally, a pull ring is arranged at one end of the handle away from the annular plate.

[0014] Optionally, the difference between the inner diameter of the magnetic ring and the outer diameter of the steel bar is 9 mm to 11 mm.

[0015] Optionally, the difference between the outer diameter of the steel bar and the inner diameter of the first through hole is 1.8 mm to 2.2 mm.

[0016] Optionally, the thickness of the magnetic ring is 6 mm to 10 mm.

[0017] Optionally, the thickness of the flexible sealing plate is 3 mm to 5 mm;

[0018] The flexible sealing plate is made of rubber.

[0019] The steel formwork reserved steel bar passing hole sealing structure provided by the present application connects the magnetic ring, the flexible sealing plate and the steel formwork in series through the steel bar. The second through hole opened on the steel formwork matches the outer diameter of the steel bar, as much as possible avoiding the concrete slurry from flowing out of the second through hole. The flexible sealing plate clamped between the steel formwork and the magnetic ring plays a role in sealing the second through hole on the steel formwork. Since the first through hole opened on the flexible sealing plate is smaller than the outer diameter of the steel bar, the flexible sealing plate can hold the steel bar more tightly to avoid the steel bar concrete slurry from flowing out of the second through hole. The magnetic ring is tightly connected to the steel formwork under its own strong magnetic force, improving the sealing performance between the flexible sealing plate and the steel bar in the second through hole, thereby avoiding the concrete slurry from flowing out of the second through hole. And the inner diameter of the magnetic ring is greater than the outer diameter of the steel bar, which is convenient for the disassembly of the magnetic ring, so as to improve the convenience of the disassembly of the steel formwork. That is to say, the present application can ensure the convenience of the disassembly of the steel formwork while avoiding the concrete slurry from flowing out of the second through hole on the steel formwork, thereby ensuring the stability of the box girder prefabrication process and the stability of the prefabricated box girder finished product. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 The structural schematic diagram of the plugging structure for the reserved steel bar passing holes in the steel formwork provided by an embodiment of the present application;

[0022] Figure 2 Provided by an embodiment of the present application Figure 1 The front view;

[0023] Figure 3 Provided by an embodiment of the present application Figure 1 The structural schematic diagram of each component in a separated state in

[0024] Figure 4 The structural schematic diagram of the plugging structure for the reserved steel bar passing holes in the steel formwork provided by an embodiment of the present application, including an annular plate.

[0025] In the figure: 100, steel bar; 200, magnetic ring; 300, flexible plugging plate; 301, first through hole; 400, steel formwork; 401, second through hole; 500, annular plate; 501, handle; 5011, pull ring. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts also belong to the scope of protection of the present application.

[0027] Referring to Figures 1 to 4 , the present application provides a plugging structure for the reserved steel bar passing holes in the steel formwork, including: a magnetic ring 200, a flexible plugging plate 300 and a steel formwork 400 that are sequentially connected in series through a steel bar 100; wherein, the magnetic ring 200, the flexible plugging plate 300 and the steel formwork 400 are all sleeved on the steel bar 100, and the magnetic force of the magnetic ring 200 needs to ensure that the flexible plugging plate 300 can be adsorbed between the magnetic ring 200 and the steel formwork 400. The specific magnitude can be set according to actual needs, and the present application does not make specific limitations thereto here.

[0028] The inner diameter of the magnetic ring 200 is larger than the outer diameter of the steel bar 100, which facilitates the installation and disassembly of the magnetic ring 200, thereby realizing the reuse of the magnetic ring 200. Moreover, the inner diameter of the magnetic ring 200 is smaller than the outer diameter of the flexible plugging plate 300.

[0029] The flexible sealing plate 300 is circular and is provided with a first through hole 301, the inner diameter of the first through hole 301 being smaller than the outer diameter of the steel bar 100; wherein, due to the flexibility of the flexible sealing plate 300 itself and the inner diameter of the first through hole 301 being smaller than the outer diameter of the steel bar 100 when the flexible sealing plate 300 is not under external force, the flexible sealing plate 300 can hold the steel bar 100 tightly, improving the tightness of the connection between the flexible sealing plate 300 and the steel bar 100.

[0030] The steel formwork 400 is provided with a second through hole 401 matching the outer diameter of the steel bar 100, so that the steel formwork 400 can be tightly sleeved on the steel bar 100 to prevent the concrete slurry from flowing out through the second through hole 401.

[0031] The steel formwork reserved rebar through-hole sealing structure provided by the present application connects the magnetic ring 200, the flexible sealing plate 300 and the steel formwork 400 in series through the steel bar 100. The second through hole 401 provided on the steel formwork 400 matches the outer diameter of the steel bar 100, as much as possible preventing the concrete slurry from flowing out through the second through hole 401. The flexible sealing plate 300 clamped between the steel formwork 400 and the magnetic ring 200 functions to seal the second through hole 401 on the steel formwork 400. Since the first through hole 301 provided on the flexible sealing plate 300 is smaller than the outer diameter of the steel bar 100, the flexible sealing plate 300 can hold the steel bar 100 more tightly to prevent the reinforced concrete slurry from flowing out through the second through hole 401. The magnetic ring 200 is tightly connected to the steel formwork 400 under the action of its own strong magnetic force, improving the sealing performance between the flexible sealing plate 300 and the second through hole 401 and the steel bar 100, thereby preventing the concrete slurry from flowing out through the second through hole 401. And the inner diameter of the magnetic ring 200 is larger than the outer diameter of the steel bar 100, facilitating the disassembly of the magnetic ring 200, so as to improve the convenience of disassembling the steel formwork 400. That is to say, while ensuring the easy disassembly of the steel formwork 400, the present application can also prevent the concrete slurry from flowing out through the second through hole 401 on the steel formwork 400, thereby ensuring the stability of the box girder prefabrication process and the stability of the prefabricated box girder finished product.

[0032] In some embodiments, referring to Figure 4 , the steel formwork reserved rebar through-hole sealing structure in the present application further includes an annular plate 500 with an inner diameter matching the outer diameter of the flexible sealing plate 300; wherein, the flexible sealing plate 300 is arranged inside the annular plate 500 to realize the fixation of the flexible sealing plate 300 by the annular plate 500, so that when the flexible sealing plate 300 is sleeved on the steel bar 100, the flexible sealing plate 300 can deform within the inner diameter space of the annular plate 500, thereby improving the sealing stability of the flexible sealing plate 300 for the gap between the second through hole 401 and the steel bar 100.

[0033] The outer diameter of the magnetic ring 200 is greater than the outer diameter of the flexible sealing plate 300. The annular plate 500 is sleeved outside the flexible sealing plate 300 and its thickness is less than or equal to the thickness of the flexible sealing plate 300. Two handles 501 are oppositely arranged on the outer peripheral wall of the annular plate 500. Among them, the thickness of the annular plate 500 is less than or equal to the thickness of the flexible sealing plate 300, so that when the annular plate 500 is sleeved on the flexible sealing plate 300, there is a preset distance between the end of the annular plate 500 close to the magnetic ring 200 and the end of the flexible sealing plate 300 close to the magnetic ring 200 (which can be specifically set according to actual needs and is not specifically limited in this application). In this way, the magnetic ring 200 can be in close contact with the end of the flexible sealing plate 300 away from the second through hole 401. And the outer diameter of the magnetic ring 200 is greater than the outer diameter of the flexible sealing plate 300, further realizing that the flexible sealing plate 300 is clamped between the magnetic ring 200 and the steel formwork 400 by the magnetic ring 200, so as to seal the gap between the second through hole 401 on the steel formwork 400 and the outer peripheral wall of the steel bar 100 through the flexible sealing plate 300, improving the sealing performance between the second through hole 401 and the outer peripheral wall of the steel bar 100. When disassembling the magnetic ring 200, the arrangement of the handle 501 makes it convenient to pull the annular plate 500 and the flexible sealing plate 300 inside the annular plate 500 away from the steel formwork 400 through the handle 501, so as to realize the disassembly of the magnetic ring 200.

[0034] Both the annular plate 500 and the handle 501 are made of 304 stainless steel. Since 304 stainless steel mainly belongs to austenitic stainless steel and has a certain stiffness, and the basic characteristic of austenitic stainless steel is non-magnetic. Therefore, the annular plate 500 made of 304 stainless steel can not only fix the flexible sealing plate 300 well, but also realize the disassembly of the magnetic ring 200 through the handle 501. In addition, the non-magnetic property of the 304 stainless steel material makes the made annular plate 500 not be attracted by the magnetic ring 200, so that the magnetic ring 200 can not only clamp the flexible sealing plate 300 between the magnetic ring 200 and the steel formwork 400, but also facilitate the disassembly of the magnetic ring 200.

[0035] In some embodiments, referring to Figure 4 , at the end of the handle 501 in this application away from the annular plate 500, a pull ring 5011 is provided. Among them, the pull ring 5011 can also be made of 304 stainless steel, and its size (diameter, inner diameter, etc.) of the pull ring 5011 can be set according to actual needs. Therefore, this application does not specifically limit it here.

[0036] During the actual disassembly of the magnetic ring 200, an external force can be used to hook the pull ring 5011 (for easy application of force), and the annular plate 500 can be pulled away from the steel formwork 400. During the pulling process of the annular plate 500, the flexible sealing plate 300 inside it is driven to move synchronously with it. Furthermore, the magnetic ring 200 is pushed away from the steel formwork 400 through the flexible sealing plate 300 until the magnetic ring 200 is disassembled from the steel bar 100, thereby realizing the disassembly of the magnetic ring 200.

[0037] In some embodiments, the difference between the inner diameter of the magnetic ring 200 and the outer diameter of the steel bar 100 in this application is 9 mm to 11 mm. That is to say, there is a certain gap between the inner peripheral wall of the magnetic ring 200 and the outer peripheral wall of the steel bar 100, and this gap is between 9 mm and 11 mm. This not only facilitates sleeving the magnetic ring 200 on the steel bar 100 but also facilitates removing the magnetic ring 200 from the steel bar 100. The specific value of the difference between the inner diameter of the magnetic ring 200 and the outer diameter of the steel bar 100 can be set according to actual needs. Therefore, this application does not make specific limitations on it here.

[0038] In some embodiments, the difference between the outer diameter of the steel bar 100 and the inner diameter of the first through hole 301 in this application is 1.8 mm to 2.2 mm. This can ensure that the diameter of the steel bar 100 is larger than the diameter of the first through hole 301. And the flexible sealing plate 300 has a certain deformation ability. Therefore, on the premise that the aperture of the first through hole 301 on the flexible sealing plate 300 is smaller than the diameter of the steel bar 100, the flexible sealing plate 300 is sleeved on the outer peripheral wall of the steel bar 100 through the first through hole 301 on it, so that the flexible sealing plate 300 can wrap the steel bar 100 more tightly under the action of its own flexibility and deformation ability. And one side of the flexible sealing plate 300 is closely attached to the steel formwork 400, so that the flexible sealing plate 300 can better seal the gap between the second through hole 401 and the steel bar 100.

[0039] In some embodiments, the thickness of the magnetic ring 200 in this application is 6 mm to 10 mm. Among them, when the thickness value of the magnetic ring 200 is between 6 mm and 10 mm, it can ensure that the magnetic ring 200 has enough magnetic force to be adsorbed closer to the steel formwork 400, so that the flexible sealing plate 300 clamped between the magnetic ring 200 and the steel formwork 400 can be connected more tightly to the second through hole 401 on the steel formwork 400, ensuring the sealing performance of the flexible sealing plate 300 for the gap between the second through hole 401 and the steel bar 100. The specific thickness value of the magnetic ring 200 can be set according to actual needs, and this application does not make specific limitations on it here.

[0040] In some embodiments, the thickness of the flexible sealing plate 400 in the present application is 3 mm to 5 mm; among them, the thickness of the flexible sealing plate 300 in the present application is limited to ensure the sealing effect, extend the service life, adapt to different working conditions and meet specific process requirements. The correct thickness selection can not only improve the sealing performance, but also reduce the maintenance cost and avoid potential safety hazards. The flexible sealing plate 300 in the present application is between 3 mm and 5 mm, so that the flexible sealing plate 300 can effectively seal the gap between the second through hole 401 and the outer diameter of the steel bar 100, ensuring the sealing performance between the flexible sealing plate 300 and the second through hole 401 and the steel bar 100, and also improving the service life of the flexible sealing plate 300 during the sealing process. The specific thickness value of the flexible sealing plate 300 can be set according to actual needs. Therefore, the present application does not make specific limitations on it here.

[0041] The flexible sealing plate 300 is made of rubber. Since rubber has excellent elasticity and recoverability, it can maintain good use elasticity within the temperature range of -70°C to +260°C. This characteristic enables the flexible sealing plate 300 made of rubber to adapt to various pressure changes and temperature fluctuations, ensuring reliable sealing effects under different working conditions. In addition, rubber also has appropriate softness and can fit well with the contact surface without contaminating the process medium. Moreover, the rubber gasket also has good wear resistance and chemical stability. For example, fluororubber not only has high temperature resistance and corrosion resistance to media, but also has high chemical stability at high temperatures and can be continuously used for 10,000 hours at a high temperature of 205°C, which makes it particularly suitable for equipment that needs to operate at high temperatures for a long time. As can be seen from the above, the flexible sealing plate 300 made of rubber in the present application has good sealing performance during the sealing process between the second through hole 401 and the steel bar 100.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A steel formwork reserved reinforcement hole blocking structure, characterized in that: include: A magnetic ring (200), a flexible blocking plate (300) and a steel formwork (400) which are sequentially connected in series via a steel bar (100); The inner diameter of the magnetic ring (200) is greater than the outer diameter of the steel bar (100); The flexible blocking plate (300) is circular and has a first through hole (301) formed thereon, wherein the inner diameter of the first through hole (301) is smaller than the outer diameter of the steel bar (100); A steel template (400) is provided with a second through hole (401) matching the outer diameter of the steel bar (100).

2. The steel template reserved reinforcement hole blocking structure according to claim 1 is characterized in that: It also includes an annular plate (500) whose inner diameter matches the outer diameter of the flexible sealing plate (300); The outer diameter of the magnetic ring (200) is greater than the outer diameter of the flexible sealing plate (300); the annular plate (500) is sleeved outside the flexible sealing plate (300) and has a thickness less than or equal to the thickness of the flexible sealing plate (300); and two handles (501) are arranged opposite to each other on the outer peripheral wall of the annular plate (500); The annular plate (500) and the handle (501) are both made of 304 stainless steel.

3. The steel template reserved reinforcement hole blocking structure according to claim 2 is characterized in that: A pull ring (5011) is provided at one end of the handle (501) away from the annular plate (500).

4. The steel template reserved reinforcement hole blocking structure according to claim 1 is characterized in that: The difference between the inner diameter of the magnetic ring (200) and the outer diameter of the steel bar (100) is 9 mm to 11 mm.

5. The steel template reserved reinforcement hole blocking structure according to claim 1 is characterized in that: The difference between the outer diameter of the steel bar (100) and the inner diameter of the first through hole (301) is 1.8 mm to 2.2 mm.

6. The steel template reserved reinforcement hole blocking structure according to claim 1 is characterized in that: The thickness of the magnetic ring (200) is 6 mm to 10 mm.

7. The steel template reserved reinforcement hole blocking structure according to any one of claims 1 to 6, characterized in that: The thickness of the flexible blocking plate (300) is 3 mm to 5 mm; The flexible sealing plate (300) is made of rubber.

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