Prefabricated box culvert joint sealing structure

Abstract

The utility model provides a prefabricated box culvert joint sealing structure, which belongs to the technical field of box culvert joint processing devices and comprises two crossed rods, a rotating shaft is arranged in the middle of each crossed rod and is parallel to the length direction of a box culvert joint, the two crossed rods are arranged in a crossed manner relative to the same rotating shaft, first ends of the crossed rods are arranged in the box culvert joint, and second ends of the crossed rods are arranged in the box culvert joint. A first sealing strip is rotationally arranged at the first end of each cross rod and abuts against the end face of the box culvert, the second ends of the cross rods are arranged outside the joint of the box culvert, and a plurality of compression springs are arranged between the second ends of the two cross rods and distributed in parallel in the length direction of the joint of the box culvert. A waterproof film is arranged between the sides, facing each other, of the two first sealing strips, and the waterproof film is made of an elastic material. The compression spring continuously pulls and holds the cross rod, so that the first sealing strip abuts against the end face of the box culvert, the sealing state is dynamically adjusted according to the actual deformation condition of the box culvert joint, and the waterproof capacity of the box culvert joint is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of box culvert joint treatment devices, and more specifically, to a prefabricated box culvert joint sealing structure. Background Technology

[0002] Box culverts are culverts constructed with reinforced concrete box-shaped pipe sections. With the vigorous development of infrastructure construction in my country, concrete box culverts are widely used in the field of underground facility laying, such as the laying of underground cables and underground tunnels.

[0003] Precast concrete box culverts are often manufactured in sections during production. These sections are then transported to the installation site, and multiple precast box culverts are assembled to form a complete system. Because these box culverts are buried deep underground for extended periods, waterproofing is necessary at the joints. Traditional waterproofing methods involve adding waterproof sealing blocks at the joints between adjacent box culverts, relying on the contact between the sealing blocks and the box culvert sections to achieve waterproofing.

[0004] As the sealing time of the waterproof sealing block increases, the elasticity of the sealing block gradually decreases, which can lead to gaps between the sealing block and the box culvert, resulting in water leakage at the joints of the box culvert. Utility Model Content

[0005] The purpose of this utility model is to provide a sealing structure for precast box culvert joints, which can dynamically adjust the sealing state according to the actual deformation of the box culvert joints, solve the problem of water leakage caused by the reduced elasticity of traditional sealing blocks, and improve the waterproof capability of box culvert joints.

[0006] The present invention is achieved through the following technical solution: a precast box culvert joint sealing structure includes two intersecting rods. A rotating shaft is provided in the middle of the intersecting rods, and the rotating shaft is parallel to the length direction of the box culvert joint. The two intersecting rods are arranged in a cross configuration relative to the same rotating shaft. The first end of the intersecting rod is located inside the box culvert joint, and a first sealing strip is rotatably provided at the first end of the intersecting rod. The first sealing strip abuts against the end face of the box culvert. The second end of the intersecting rod is located outside the box culvert joint. A plurality of compression springs are provided between the second ends of the two intersecting rods. The plurality of compression springs are distributed in parallel along the length direction of the box culvert joint. A water-proof membrane is provided between the two first sealing strips facing each other. The water-proof membrane is made of elastic material.

[0007] Furthermore, a pressure groove is provided on the end face of the box culvert, and the first sealing strip is inserted into and fixed in the pressure groove.

[0008] Furthermore, it also includes a mounting base, which is disposed within the joint of the box culvert. A screw is rotatably mounted on the mounting base, and a pressure strip is disposed on the screw. The large end of the screw abuts against the end face of the pressure strip, and both sides of the pressure strip abut against the position between the second ends of the two cross rods and the rotation shaft.

[0009] Furthermore, a second sealing strip is slidably sleeved between the first end of the cross rod and the rotating shaft, the first end of the cross rod is pressed against the end face of the second sealing strip, and the side of the second sealing strip abuts against the end face of the box culvert.

[0010] Furthermore, a top-holding spring is provided on the cross bar, and the top-holding spring is located between the second sealing strip and the rotating shaft. The top-holding spring pushes the second sealing strip toward the end face of the box culvert.

[0011] Furthermore, the end face of the second sealing strip is a bevel, and the bevel slides and abuts against the cross bar.

[0012] Furthermore, the second end of the cross bar is provided with a pressing edge, which abuts against the surface of the box culvert.

[0013] Furthermore, it also includes a corrugated groove, which is disposed on the surface of the box culvert, and the pressing edge is inserted into the corrugated groove.

[0014] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0015] 1. This utility model uses the elastic force of a compression spring to pull the second ends of the cross rods away from each other. The two cross rods rotate around the rotation axis, causing the first end of the cross rod to push the first sealing strip against the end face of the box culvert. When the elasticity of the first sealing strip decreases, causing a gap to appear between the first sealing strip and the end face of the box culvert, the elastic force of the compression spring continues to act on the cross rod, causing the first sealing strip to be pressed against the end face of the box culvert again. This achieves dynamic adjustment of the sealing state according to the actual deformation of the box culvert joint, thereby improving the waterproofing capability of the box culvert joint.

[0016] 2. This utility model provides a second sealing strip on the cross bar. When the second sealing strip is pressed by the cross bar and subjected to the action of the top spring, the second sealing strip abuts against the edge of the pressure groove, reducing the amount of water that may enter the pressure groove through the edge of the pressure groove. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the gap in the box culvert of this utility model;

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle.

[0021] Icons: 10. Mounting base; 11. Waterproof membrane; 12. Support rod; 13. Screw; 14. Pressure strip; 20. Cross rod; 201. Inner rod; 202. Outer rod; 203. Rotating shaft; 21. First sealing strip; 22. Top holding spring; 23. Second sealing strip; 231. Bevel; 24. Pressing edge; 25. Compression spring; 30. Corrugated groove; 31. Sealing adhesive; 32. Pressure groove. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. Example

[0024] The following description, in conjunction with specific embodiments, provides further details. Figures 1-3 As shown, this utility model is a sealing structure for the joints of precast box culverts, referring to... Figure 1 and Figure 2The system includes a mounting base 10 disposed within the joint of the box culvert. The mounting base 10 is positioned along the length of the joint, with both sides of the mounting base 10 facing the end face of the box culvert. A set of sealing components is mounted on the top and bottom surfaces of the mounting base 10. The two sets of sealing components have identical structures and are symmetrically distributed relative to the mounting base 10. The following is a description of the structure of one set of sealing components.

[0025] Reference Figure 2 and Figure 3 Two cross rods 20 are rotatably mounted above the top surface of the mounting base 10. Each cross rod 20 includes an inner rod 201, an outer rod 202, and a rotating shaft 203. The inner rod 201 and the outer rod 202 are on the same straight line, and the rotating shaft 203 is located between the inner rod 201 and the outer rod 202, parallel to the length direction of the box culvert joint. The two cross rods 20 are arranged in a crisscross pattern relative to the rotating shaft 203. The inner rod 201 is located inside the box culvert joint, and a first sealing strip 21 is rotatably mounted on the end of the inner rod 201 away from the rotating shaft 203. The first sealing strip 21 extends along the length direction of the box culvert joint and abuts against the end face of the box culvert. A pressure groove 32 is formed on the end face of the box culvert, and the first sealing strip 21 abuts against the pressure groove 32. A supporting spring 22 and a second sealing strip 23 are sleeved on the rod body of the inner rod 201, and the first end of the supporting spring 22 is fixedly connected to the rod body of the inner rod 201. The second sealing strip 23 has a through hole, through which the inner rod 201 slides. One side of the second sealing strip 23 abuts against the second end of the supporting spring 22, and the other side of the second sealing strip 23 is used to press against the end face of the box culvert. The supporting spring 22 is in a compressed state, and the elastic force of the supporting spring 22 pushes the second sealing strip 23 against the end face of the box culvert. The top surface and / or bottom surface of the second sealing strip 23 is provided with an inclined surface 231, and the rod body of the outer rod 202 is pressed against the inclined surface 231.

[0026] Reference Figure 2 and Figure 3 A water-resistant membrane 11 is provided on each side of the mounting base 10. The other edge of the water-resistant membrane 11 is fixedly connected to the first sealing strip 21, and the water-resistant membrane 11 is made of elastic material. When the two first sealing strips 21 move away from each other, the water-resistant membrane 11 is in a stretched state to isolate water. Support rods 12 are also rotatably mounted on both sides of the mounting base 10. The first end of the support rod 12 is rotatably connected to the side of the mounting base 10, and the other end of the support rod 12 is rotatably connected to the side of the first sealing strip 21. The length of the support rod 12 is greater than the maximum distance between the mounting base 10 and the first sealing strip 21. There are two layers of support rods 12, which are respectively provided on both sides of the water-resistant membrane 11, and the support rods 12 are used to support the water-resistant membrane 11.

[0027] Reference Figure 2The outer rod 202 is located outside the joint of the box culvert. A pressing edge 24, made of elastic material, is fixedly installed at the end of the outer rod 202 furthest from the inner rod 201. A corrugated groove 30 is provided at the edge of the outer surface of the box culvert. When the outer rod 202 approaches the end of the box culvert, the pressing edge 24 is inserted into the corrugated groove 30. A compression spring 25 is detachably installed at the end of the outer rod 202 furthest from the inner rod 201. The two ends of the compression spring 25 are respectively connected to the ends of the two outer rods 202, and the compression spring 25 pushes the ends of the two outer rods 202 away from each other.

[0028] Reference Figure 2 and Figure 3 The mounting base 10 has a screw hole on its top surface, in which a screw rod 13 is rotatably mounted. A pressure strip 14 is slidably mounted on the body of the screw rod 13, extending along the length of the joint. A through hole is formed inside the pressure strip 14, through which the screw rod 13 passes. The pressure strip 14 is located between the two outer rods 202 of the cross rod 20. As the screw rod 13 is screwed into the screw hole, the two sides of the pressure strip 14 press against the two outer rods 202 respectively, increasing the included angle between the two outer rods 202. The two inner rods 201 push the first sealing strip 21 away from each other and abut against the end face of the box culvert. The bottom surface of the mounting base 10 also has a screw hole, a screw rod 13, and a pressure strip 14, with the same structure as the top surface of the mounting base 10, which will not be described again here.

[0029] Reference Figure 1 After the sealing assembly is adjusted, sealant 31 is sprayed into the gap. The sealant 31 wraps the sealing assembly inside, preventing the parts in the sealing assembly from being corroded by water accumulation.

[0030] The working process of this embodiment is as follows: The mounting base 10 is placed in the gap of the culvert. The screw 13 is rotated, driving the pressure strip 14 towards the rotation axis 203 of the cross rod 20. The pressure strip 14 presses against the two outer rods 202, causing them to move away from each other. During the rotation of the outer rods 202, the inner rod 201 simultaneously rotates around the rotation axis 203, pushing the first sealing strip 21 against the end face of the culvert. Simultaneously, the outer rods 202 press against the groove of the second sealing strip 23, moving it towards the end face of the culvert. Combined with the cooperation of the top spring 22, the second sealing strip 23 is pushed against the gap between the first sealing strip 21 and the end face of the culvert. After the first sealing strip 21 is pressed against the end face of the culvert, compression springs 25 are used to press against the ends of the two outer rods 202 respectively, using the elasticity of the compression springs 25 to keep the two outer rods 202 away from each other. Then, sealant 31 is sprayed into the gap to seal the gap on the outer surface of the box culvert.

[0031] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sealing structure for joints of precast box culverts, characterized in that, The device includes two cross rods (20), with a rotating shaft (203) in the middle of each cross rod (20). The rotating shaft (203) is parallel to the length direction of the box culvert joint. The two cross rods (20) are arranged in a cross configuration relative to the same rotating shaft (203). The first end of each cross rod (20) is located inside the box culvert joint. A first sealing strip (21) is rotatably provided at the first end of each cross rod (20). The first sealing strip (21) abuts against the end face of the box culvert. The second end of each cross rod (20) is located outside the box culvert joint. Multiple compression springs (25) are provided between the second ends of the two cross rods (20). The multiple compression springs (25) are distributed in parallel along the length direction of the box culvert joint. A water-proof membrane (11) is provided between the two first sealing strips (21) facing each other. The water-proof membrane (11) is made of elastic material.

2. The precast box culvert joint sealing structure according to claim 1, characterized in that: The end face of the box culvert is provided with a pressure groove (32), and the first sealing strip (21) is inserted into and fixed in the pressure groove (32).

3. The precast box culvert joint sealing structure according to claim 1, characterized in that: It also includes a mounting base (10), which is set in the joint of the box culvert. A screw (13) is rotatably mounted on the mounting base (10), and a pressure strip (14) is provided on the screw (13). The large end of the screw (13) abuts against the end face of the pressure strip (14), and both sides of the pressure strip (14) abut against the position between the second end of the two cross rods (20) and the rotating shaft (203).

4. The precast box culvert joint sealing structure according to claim 1, characterized in that: A second sealing strip (23) is slidably sleeved between the first end of the cross rod (20) and the rotating shaft (203). The first end of the cross rod (20) is pressed against the end face of the second sealing strip (23), and the side of the second sealing strip (23) abuts against the end face of the box culvert.

5. The precast box culvert joint sealing structure according to claim 4, characterized in that: A top-holding spring (22) is provided on the cross bar (20). The top-holding spring (22) is located between the second sealing strip (23) and the rotating shaft (203). The top-holding spring (22) pushes the second sealing strip (23) toward the end face of the box culvert.

6. The precast box culvert joint sealing structure according to claim 4, characterized in that: The end face of the second sealing strip (23) is a bevel (231), and the bevel (231) slides and abuts against the cross bar (20).

7. The precast box culvert joint sealing structure according to claim 1, characterized in that: The second end of the cross bar (20) is provided with a pressing edge (24), which abuts against the surface of the box culvert.

8. The precast box culvert joint sealing structure according to claim 7, characterized in that: It also includes a corrugated groove (30), which is disposed on the surface of the box culvert, and the pressing edge (24) is inserted into the corrugated groove (30).

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