A concrete intercepting device and method of use thereof

Abstract

The application discloses a concrete intercepting device and a use method thereof, and belongs to the technical field of concrete intercepting devices, and comprises intercepting strips and flexible intercepting units which need to be inserted into a pouring form simultaneously and separate different grade concretes in the pouring form. In the beam and column pouring construction operation, the different grade concretes used for pouring beams and columns are intercepted through the intercepting strips and the flexible intercepting units, the flexible intercepting units are placed at the fixed steel bars in the pouring form and are used for intercepting and plugging the fixed steel bars in the pouring form, and can be elastically deformed according to the shape of the steel bars, so that the intercepting device is convenient for installation by construction personnel, the blind area is reduced, the intercepting effect of the device on the concrete is improved, the flexible intercepting units and the intercepting strips are pulled out from the pouring form respectively when the concrete is initially solidified, and therefore the device can be recycled in the beam and column pouring construction operation.

Description

Technical Field

[0001] This application relates to the field of concrete interception device technology, and more specifically, to a concrete interception device and its usage method. Background Technology

[0002] Strong column-weak beam structure is a widely used structural form in the construction industry. This structure requires the separate pouring of high- and low-grade concrete for the columns and beams. During the pouring process, it is necessary to intercept the high- and low-grade concrete to prevent cross-contamination, which could lead to waste of the high-grade concrete and cracks in the final structure, ultimately affecting its strength.

[0003] The prior art publication CN219175887U discloses a concrete interception device for beam and column pouring construction. In use, the entire interception net of the device is unfolded and placed within the reinforcing cage of the beam or column to be poured, forming an interception surface. Transverse reinforcing rods or tie rods are inserted into the through holes to form transverse reinforcing ribs, increasing the overall rigidity of the device's plane. Tie wires are used to bind the inserted transverse reinforcing rods and the reinforcing cage together, preventing displacement of the interception device during pouring.

[0004] While the existing technical solutions described above can achieve the relevant beneficial effects through their structure, they still have the following drawbacks: After the existing concrete interception device is tied and fixed to the reinforcing steel cage, with the pouring and solidification of concrete of different grades, the existing interception device cannot be reused while achieving the interception effect, increasing the cost of beam and column pouring construction. Furthermore, due to the large number of reinforcing bars at the beam-column junction, the existing interception device has many anchoring points with the reinforcing bars during installation, which undoubtedly increases the complexity of operation. This makes it difficult to install the interception net used to intercept concrete of different grades in the beam and column reinforcing steel cage. If it is forcibly dragged to the designated position, the reinforcing bars can easily penetrate the interception net, causing the interception net to lose its interception function and be easily broken by the concrete, allowing high-strength concrete to flow into the surrounding beams and slabs, resulting in concrete waste and increased costs.

[0005] In view of this, we propose a concrete interception device and its application method. Summary of the Invention

[0006] Technical problems to be solved

[0007] The purpose of this application is to provide a concrete interception device and a method for using the same, which solves the technical problems mentioned in the background art.

[0008] Technical solution

[0009] This application provides a concrete interception device and its usage method, including interception strips and flexible interception units that need to be simultaneously inserted into the casting formwork to separate concrete of different grades within the formwork. The flexible interception units are placed at the locations of the reinforcing bars tied and fixed within the casting formwork to intercept and seal the fixed reinforcing bars, and can undergo corresponding elastic deformation according to the shape of the reinforcing bars. The flexible interception units are placed on one side of the reinforcing bars, and the interception strips are placed on the other side. The flexible interception unit includes an interception stand, and a strip-shaped cavity is provided on the side wall of the interception stand. The strip-shaped cavity contains, from top to bottom, uniform... Multiple elastically retractable intercepting tentacles are evenly distributed; the interior of the intercepting stand has a connecting cavity groove with its top end penetrating through the top wall of the intercepting stand, and a pressure regulator is installed at the top opening of the connecting cavity groove; the pressure regulator is used to actively release the pressure inside the connecting cavity groove when the air pressure inside the connecting cavity groove is greater than a set value; the interior of the intercepting stand also has an internal sensing unit that works in conjunction with the intercepting tentacles, and can sense and monitor the pressure on the surface of the intercepting bar side wall when the intercepting tentacles elastically contract, and triggers the indicator light to turn on when the pressure of the flexible intercepting unit on one side of the steel bar on the surface of the intercepting bar on the other side of the steel bar reaches a critical value.

[0010] As an optional solution to the technical solution of this application, the intercepting tentacle includes a fixed base column with one end fixedly connected to the bottom wall of the strip-shaped cavity, an air duct connected inside the fixed base column, and a retractable sleeve sealed and slidably fitted on the other end of the fixed base column, with a return spring inside the retractable sleeve.

[0011] As an optional solution to the technical solution in this application, one end of the air intake pipe is connected to the connecting cavity groove, and the other end passes through the end of the fixed bottom column and is connected to the inner cavity of the retractable sleeve.

[0012] As an optional solution to the technical solution in this application, one end of the return spring is connected to the end of the inner cavity of the retracting sleeve, and the other end is connected to the end of the fixed bottom column.

[0013] As an optional solution to the technical solution of this application, the internal sensing unit includes a sensing cavity disposed inside the wall thickness of the intercepting stand. A synchronous elastic diaphragm is connected inside the sensing cavity. The synchronous elastic diaphragm divides the internal space of the sensing cavity into a first chamber and a second chamber, and the second chamber is connected to the connecting groove. The first chamber is filled with nitrogen gas, and an induction mechanism is also provided inside the first chamber.

[0014] As an optional solution to the technical solution of this application, the induction mechanism includes an excitation end piece one and a fixed frame connected to the inner wall of the first chamber. A drive rod is slidably inserted on the fixed frame, and one end of the drive rod is connected to a synchronous elastic diaphragm, while the other end is connected to an excitation end piece two. The excitation end piece one is connected to the inner wall of the first chamber.

[0015] As an optional solution to the technical solution in this application, when the excitation end piece 2 moves toward the excitation end piece 1 and comes into contact with the excitation end piece 1, the trigger indicator light is turned on.

[0016] As an optional solution to the technical solution of this application, the pressure regulator includes a sealing head that covers the top opening of the connecting cavity groove and a limiting strip connected to the inner cavity of the connecting cavity groove; a guide rod is inserted through the limiting strip, and a tension spring connected between the sealing head and the limiting strip is sleeved on the outer periphery of the guide rod; a limiting block is connected to the bottom end of the guide rod.

[0017] This application provides a concrete interception device and its usage method, including the following steps:

[0018] S1. Place the flexible interception unit on one side of the steel bar that is tied and fixed inside the casting template, and then place the interception strip on the other side of the steel bar.

[0019] S2. Insert intercepting strips into the casting template. As the number of intercepting strips gradually increases, the newly inserted intercepting strips in the template exert pressure on the side wall of the flexible intercepting unit.

[0020] S3. After the flexible interception unit is subjected to the squeezing force of the interception strip inserted into the casting template, the interception tentacles on the flexible interception unit corresponding to the positions of the steel bars tied and fixed in the template gradually retract after contacting the steel bars, and the remaining interception tentacles gradually retract after contacting the side wall of the interception strip.

[0021] S4. During the retraction process of the retracting sleeve in the intercepting tentacle, the retracting sleeve gradually compresses the air in its inner cavity into the connecting cavity through the air duct.

[0022] S5. The air injected into the connecting cavity then flows into the second chamber of the inner sensing unit;

[0023] S6. When the air pressure in the second chamber is greater than that in the first chamber, the pressure of the intercepting tentacles on the side wall surface of the intercepting strip exceeds the preset value. Simultaneously, the elastic diaphragm is squeezed by the air pressure in the second chamber, undergoes elastic deformation, and expands elastically towards the first chamber.

[0024] S7. The synchronous elastic diaphragm with elastic deformation drives the second excitation end piece to contact the first excitation end piece and triggers the indicator light to turn on, prompting the construction personnel to pour different grades of concrete into the casting template on both sides of the interception structure formed by the interception strip and the flexible interception unit.

[0025] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0026] 1. Place the flexible interception unit on one side of the reinforcing steel bar that is tied and fixed inside the casting template, and then place the interception strip on the other side of the reinforcing steel bar. Then, insert the interception strip into the casting template. As the number of interception strips inserted gradually increases, the newly inserted interception strips in the template exert pressure on the side wall of the flexible interception unit. After being squeezed by the interception strips inserted into the casting template, the interception tentacles on the flexible interception unit corresponding to the position of the reinforcing steel bar tied and fixed inside the template gradually retract after contacting the reinforcing steel bar. The remaining interception tentacles gradually retract after contacting the side wall of the interception strip. This allows the construction personnel to quickly and conveniently install and fix this interception device inside the casting template, and to intercept and separate the concrete of different grades poured into the casting template through the interception structure composed of the interception strip and the flexible interception unit.

[0027] 2. The flexible interception unit is placed inside the casting formwork at the location where the reinforcing bars are tied and fixed. It is used to intercept and seal the location where the reinforcing bars are tied and fixed inside the casting formwork. It can also undergo corresponding elastic deformation according to the shape of the reinforcing bars. This makes it convenient for construction personnel to install the interception device, while also helping to reduce the interception blind zone and improve the interception effect of the device on concrete.

[0028] 3. During the retraction process of the retracting sleeve in the interceptor tentacle, the air inside the sleeve is gradually compressed into the connecting cavity through the air intake pipe. The air injected into the connecting cavity then flows into the second chamber of the inner sensing unit. When the air pressure in the second chamber is greater than that in the first chamber, the pressure of the interceptor tentacle on the side wall surface of the interceptor strip exceeds a preset value. The synchronous elastic diaphragm is compressed by the air pressure in the second chamber, undergoes elastic deformation, and expands elastically towards the first chamber. The elastically deformed synchronous elastic diaphragm drives the second excitation end plate to contact the first excitation end plate and trigger the connection. When the indicator light turns on, it prompts construction workers to pour concrete of different grades onto both sides of the interception structure formed by the interception strips and flexible interception units inside the pouring formwork. This ensures that the squeezing force exerted by the interception strips on the flexible interception units is sufficient when they are installed inside the pouring formwork. This prevents relative displacement between the interception strips and the flexible interception units due to insufficient squeezing force during concrete pouring, which could lead to grout leakage. Therefore, this effectively ensures the interception effect of this interception device on different grades of concrete during the pouring of beam and column concrete.

[0029] 4. During the retraction process of the retracting sleeve in the interceptor tentacle, the retracting sleeve gradually compresses the air in its inner cavity into the connecting cavity through the air duct. When the air pressure in the connecting cavity exceeds the preset critical value, it pushes the sealing head to move upward, completing the depressurization process of the air pressure inside the connecting cavity. This ensures the stability of the air pressure inside the connecting cavity and also prevents the synchronous elastic diaphragm from being squeezed and ruptured due to excessive air pressure inside the connecting cavity during the retraction of the interceptor tentacle, which would affect the sensing and monitoring function of the internal sensing unit.

[0030] 5. In the beam and column casting construction operation, this application uses interception strips and flexible interception units to intercept different grades of concrete used in the casting of beams and columns. When the concrete initially sets, the flexible interception units and interception strips are pulled out from the casting formwork respectively, which is convenient for disassembly and assembly. Thus, this device can be recycled in the beam and column casting construction operation, effectively reducing construction costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the flexible interception unit of the present invention;

[0033] Figure 3 For the present invention Figure 2 A magnified schematic diagram of a portion of the structure in section A.

[0034] Figure 4 For the present invention Figure 3 A magnified schematic diagram of a portion of the structure in section C;

[0035] Figure 5 For the present invention Figure 2 A magnified schematic diagram of a local structure in section B.

[0036] The following are the labels in the diagram: 1. Interception bar; 201. Interception stand; 202. Indicator light; 203. Connecting cavity groove; 204. Retracting sleeve; 205. Return spring; 206. Fixed base column; 207. Air duct; 208. Synchronous elastic diaphragm; 209. Nitrogen; 210. Excitation end plate one; 211. Excitation end plate two; 212. Drive rod; 213. Sealing head; 214. Tension spring. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. The application will be further described in detail below with reference to the accompanying drawings.

[0038] Reference Figures 1 to 3This application provides a concrete interception device, including an interception strip 1 that needs to be simultaneously inserted into a casting template to separate concrete of different grades within the template, and a flexible interception unit. The flexible interception unit is placed at the location of the reinforcing bars tied and fixed within the casting template to intercept and seal the reinforcing bars, and can undergo corresponding elastic deformation according to the shape of the reinforcing bars. The flexible interception unit is placed on one side of the reinforcing bars, and the interception strip 1 is placed on the other side of the reinforcing bars. The flexible interception unit includes an interception stand 201, and a strip-shaped cavity is provided on the side wall of the interception stand 201. Multiple elastically expandable interception strips are evenly arranged from top to bottom within the strip-shaped cavity. The interceptor has a connecting cavity 203 inside the interceptor stand 201, with its top end penetrating through the top wall of the interceptor stand 201. A pressure regulator is provided at the top opening of the connecting cavity 203. The pressure regulator is used to actively release the pressure inside the connecting cavity 203 when the internal air pressure is greater than a set value. The interceptor stand 201 also has an internal sensing unit that works in conjunction with the interceptor and can sense and monitor the pressure on the side wall surface of the interceptor strip 1 when the interceptor elastically contracts. Furthermore, when the pressure of the flexible interceptor unit on one side of the steel bar on the surface of the interceptor strip 1 on the other side of the steel bar reaches a critical value, it triggers the indicator light 202 to turn on.

[0039] Reference Figure 2 and Figure 3This application provides a concrete interception device. The interception arm includes a fixed base column 206 with one end fixedly connected to the bottom wall of a strip-shaped groove. An air intake pipe 207 is connected inside the fixed base column 206. A retractable sleeve 204 is slidably and sealingly fitted onto the other end of the fixed base column 206. A return spring 205 is provided inside the retractable sleeve 204. One end of the air intake pipe 207 is connected to a connecting groove 203, and the other end passes through the end of the fixed base column 206 and is connected to the inner cavity of the retractable sleeve 204. One end of the return spring 205 is connected to the end of the inner cavity of the retractable sleeve 204, and the other end is connected to the end of the fixed base column 206. The flexible interception unit is placed on one side of the reinforcing steel bars that are tied and fixed inside the casting formwork. Interception strip 1 is then placed on the other side of the reinforcing steel bars. Interception strip 1 is then inserted into the casting formwork. As the number of interception strips 1 inserted gradually increases, the newly inserted interception strips 1 exert pressure on the sidewall of the flexible interception unit. Under the compressive force of the interception strips 1 inserted into the casting formwork, the interception tentacles on the flexible interception unit corresponding to the positions of the tied and fixed reinforcing steel bars gradually retract after contacting the steel bars. The remaining interception tentacles gradually retract after contacting the sidewall of the interception strip 1. This allows construction personnel to quickly and easily install and fix this interception device inside the casting formwork. The interception structure composed of interception strip 1 and the flexible interception unit separates and intercepts concrete of different grades poured into the casting formwork. The flexible interception unit is placed at the location of the tied and fixed reinforcing steel bars inside the casting formwork to intercept and seal the tied and fixed reinforcing steel bars. It can also undergo corresponding elastic deformation according to the shape of the reinforcing steel bars, which not only facilitates the installation of this interception device by construction personnel but also helps to reduce the interception blind spot. In the beam and column pouring construction operation, this application uses interception strip 1 and flexible interception unit to intercept different grades of concrete used in the pouring beam and column. When the concrete initially sets, the flexible interception unit and interception strip 1 are pulled out from the pouring formwork respectively, which is convenient for disassembly and assembly. Thus, this device can be recycled in the beam and column pouring construction operation, effectively reducing construction costs.

[0040] Reference Figure 3 and Figure 4This application provides a concrete interception device. The internal sensing unit includes a sensing cavity disposed within the wall of the interception stand 201. A synchronous elastic diaphragm 208 is connected within the sensing cavity, dividing the internal space of the sensing cavity into a first chamber and a second chamber. The second chamber is connected to a connecting groove 203. The first chamber is filled with nitrogen gas 209 and also includes an induction mechanism. The induction mechanism includes an excitation end piece 210 and a fixed frame connected to the inner wall of the first chamber. A drive rod 212 is slidably inserted into the fixed frame, with one end of the drive rod 212 connected to the synchronous elastic diaphragm 208 and the other end connected to an excitation end piece 211. The excitation end piece 210 is connected to the inner wall of the first chamber. When the excitation end piece 211 moves towards and contacts the excitation end piece 210, a trigger indicator light 202 is activated. During the retraction process of the retracting sleeve 204 in the interceptor tentacle, the air inside the sleeve 204 is gradually compressed into the connecting cavity groove 203 through the air intake pipe 207. The air injected into the connecting cavity groove 203 then flows into the second chamber of the inner sensing unit. When the air pressure in the second chamber is greater than the air pressure in the first chamber, the pressure of the interceptor tentacle on the side wall surface of the interceptor strip 1 exceeds a preset value. The synchronous elastic diaphragm 208 is compressed by the air pressure in the second chamber, undergoes elastic deformation, and expands elastically towards the first chamber. The elastically deformed synchronous elastic diaphragm... When the excitation end 211 of the drive plate 208 contacts the excitation end 210, it triggers the indicator light 202 to turn on, prompting the construction personnel to pour concrete of different grades into the pouring template on both sides of the interception structure formed by the interception strip 1 and the flexible interception unit. This ensures that when the flexible interception unit is installed in the pouring template, the squeezing force of the interception strip 1 on it can meet the standard, avoiding the situation where the relative displacement between the interception strip 1 and the flexible interception unit occurs due to insufficient squeezing force of the interception strip 1 on the flexible interception unit during concrete pouring, which would cause grout leakage during the pouring process.

[0041] Reference Figure 2 and Figure 5This application provides a concrete interception device. The pressure regulator includes a sealing head 213 that covers the top opening of the connecting cavity 203 and a limiting strip connected to the inner cavity of the connecting cavity 203. A guide rod is inserted through the limiting strip, and a tension spring 214 connected between the sealing head 213 and the limiting strip is sleeved on the outer periphery of the guide rod. A limiting block is connected to the bottom end of the guide rod. During the retraction process of the retracting sleeve 204 in the interception tentacles, the retracting sleeve 204 gradually compresses the air in its inner cavity into the connecting cavity 203 through the air intake pipe 207. When the air pressure in the connecting cavity 203 exceeds a preset critical value, it pushes the sealing head 213 upward, completing the depressurization treatment of the air pressure inside the connecting cavity 203. This ensures the stability of the air pressure inside the connecting cavity 203 and also prevents the synchronous elastic diaphragm 208 from being squeezed and ruptured due to excessive air pressure inside the connecting cavity 203 during the retraction process of the interception tentacles, thereby affecting the sensing and monitoring function of the internal sensing unit.

[0042] This application provides a method for using a concrete interception device, including the following steps:

[0043] S1. Place the flexible interception unit on one side of the steel bar that is tied and fixed inside the casting template, and then place the interception strip 1 on the other side of the steel bar;

[0044] S2. Insert intercepting strips 1 into the casting template. As the number of intercepting strips 1 inserted gradually increases, the newly inserted intercepting strips 1 in the template exert pressure on the side wall of the flexible intercepting unit.

[0045] S3. After the flexible interception unit is subjected to the squeezing force of the interception strip 1 inserted into the casting template, the interception tentacles on the flexible interception unit corresponding to the positions of the steel bars tied and fixed in the template gradually retract after contacting the steel bars, and the remaining interception tentacles gradually retract after contacting the side wall of the interception strip 1.

[0046] S4. During the retraction process of the retracting sleeve 204 in the intercepting tentacle, the air in the retracting sleeve 204 is gradually squeezed and compressed into the connecting cavity groove 203 through the air duct 207.

[0047] S5. The air injected into the connecting cavity 203 then flows into the second chamber of the inner sensing unit;

[0048] S6. When the air pressure in the second chamber is greater than that in the first chamber, the pressure of the intercepting tentacles on the side wall surface of the intercepting strip 1 exceeds the preset value. The synchronous elastic diaphragm 208 is squeezed by the air pressure in the second chamber and undergoes elastic deformation and expands elastically towards the first chamber.

[0049] S7. The synchronous elastic diaphragm 208 with elastic deformation drives the second excitation end piece 211 to contact the first excitation end piece 210 and triggers the indicator light 202 to turn on, prompting the construction personnel to pour concrete of different grades into the casting template on both sides of the interception structure formed by the interception strip 1 and the flexible interception unit.

Claims

1. A concrete interception device, characterized in that: This includes interception strips (1) that need to be inserted into the casting formwork simultaneously to separate concrete of different grades within the casting formwork, and flexible interception units; The flexible interception unit is placed inside the casting template at the location where the reinforcing bars are tied and fixed, in order to intercept and block the location where the reinforcing bars are tied and fixed inside the casting template, and can undergo corresponding elastic deformation according to the shape of the reinforcing bars. A flexible interception unit is placed on one side of the reinforcing bar, and an interception strip is placed on the other side of the reinforcing bar (1). The flexible interception unit includes an interception stand (201), and a strip-shaped groove is provided on the side wall of the interception stand (201). Multiple elastically retractable interception tentacles are uniformly arranged from top to bottom in the strip-shaped groove. The interceptor stand (201) has a connecting cavity (203) with its top end penetrating through the top wall of the interceptor stand (201), and a pressure regulator is provided at the top opening of the connecting cavity (203); The pressure regulator is used to actively release the pressure inside the connecting cavity (203) when the internal air pressure is greater than the set value; The intercepting stand (201) is also equipped with an internal sensing unit that works in conjunction with the intercepting tentacles and can sense and monitor the pressure on the side wall surface of the intercepting strip (1) when the intercepting tentacles elastically contract. Furthermore, when the pressure of the flexible intercepting unit on the surface of the intercepting strip (1) on the other side of the steel bar reaches a critical value, the indicator light (202) is activated.

2. The concrete interception device according to claim 1, characterized in that: The intercepting tentacles include a fixed base column (206) with one end fixedly connected to the bottom wall of the strip-shaped groove cavity, an air intake pipe (207) connected inside the fixed base column (206), and a retraction sleeve (204) sealed and slidably fitted on the other end of the fixed base column (206), and a return spring (205) provided inside the retraction sleeve (204).

3. The concrete interception device according to claim 2, characterized in that: One end of the air intake pipe (207) is connected to the connecting cavity groove (203), and the other end passes through the end of the fixed bottom column (206) and is connected to the inner cavity of the retractable sleeve (204).

4. The concrete interception device according to claim 3, characterized in that: One end of the return spring (205) is connected to the end of the inner cavity of the retracting sleeve (204), and the other end is connected to the end of the fixed base column (206).

5. The concrete interception device according to claim 4, characterized in that: The internal sensing unit includes a sensing cavity disposed inside the wall thickness of the intercepting stand (201). A synchronous elastic diaphragm (208) is connected inside the sensing cavity. The synchronous elastic diaphragm (208) divides the internal space of the sensing cavity into a first chamber and a second chamber, and the second chamber is connected to the connecting groove (203). The first chamber is filled with nitrogen gas (209), and an induction mechanism is also provided in the first chamber.

6. The concrete interception device according to claim 5, characterized in that: The induction mechanism includes an excitation end piece one (210) and a fixed frame connected to the inner wall of the first chamber. A drive rod (212) is slidably inserted on the fixed frame, and one end of the drive rod (212) is connected to a synchronous elastic diaphragm (208), while the other end is connected to an excitation end piece two (211). The excitation end piece (210) is connected to the inner wall of the first chamber.

7. The concrete interception device according to claim 6, characterized in that: When the second excitation end piece (211) moves toward the first excitation end piece (210) and comes into contact with the first excitation end piece (210), the trigger indicator light (202) is turned on.

8. The concrete interception device according to claim 7, characterized in that: The pressure regulator includes a plug (213) that covers the top opening of the connecting cavity (203) and a limiting strip connected to the inner cavity of the connecting cavity (203); A guide rod is inserted through the limiting strip, and a tension spring (214) is sleeved on the outer periphery of the guide rod, connecting the sealing head (213) and the limiting strip. A limit block is connected to the bottom end of the guide rod.

9. The method of using a concrete interception device according to claim 8, characterized in that, Includes the following steps: S1. Place the flexible interception unit on one side of the steel bar that is tied and fixed inside the casting template, and then place the interception strip (1) on the other side of the steel bar. S2. Insert intercepting strips (1) into the casting template. As the number of intercepting strips (1) inserted gradually increases, the newly inserted intercepting strips (1) in the template exert pressure on the side wall of the flexible intercepting unit. S3. After the flexible interception unit is subjected to the squeezing force of the interception strip (1) inserted into the casting template, the interception tentacles on the flexible interception unit corresponding to the positions of the steel bars tied and fixed in the template gradually retract after contacting the steel bars, and the remaining interception tentacles gradually retract after contacting the side wall of the interception strip (1). S4. During the retraction process of the retracting sleeve (204) in the intercepting tentacle, the retracting sleeve (204) gradually squeezes and compresses the air in its inner cavity into the connecting cavity groove (203) through the air duct (207); S5. The air injected into the connecting cavity (203) then flows into the second chamber of the inner sensing unit; S6. When the air pressure in the second chamber is greater than that in the first chamber, the pressure of the intercepting tentacles on the side wall surface of the intercepting strip (1) exceeds the preset value. Simultaneously, the elastic diaphragm (208) is squeezed by the air pressure in the second chamber and undergoes elastic deformation and expands elastically towards the first chamber. S7. The elastically deformable synchronous elastic diaphragm (208) drives the second excitation end piece (211) to contact the first excitation end piece (210) and triggers the indicator light (202) to turn on, prompting the construction personnel to pour concrete of different grades into the casting template on both sides of the interception structure formed by the interception strip (1) and the flexible interception unit.

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