Comb tooth type bridge expansion device and bridge
By designing an integrated three-dimensional structure comb-type bridge expansion device connected to the cantilever support structure, anchor structure and drainage structure, the problems of traditional devices being easily loosened, raised and fatigued when passing through the car at high speed are solved, and higher impact bearing capacity, durability and drainage and stain-proof effect are achieved.
Patent Information
- Application Number
- CN202421398167.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-18
AI Technical Summary
The bumps, noise and load impacts generated by existing bridge expansion devices when passing through the car at high speed can easily lead to loosening of the fastening bolts, lifting of the comb plate, fatigue damage to parts and jamming of debris, affecting the function and may cause traffic accidents.
A comb-tooth bridge expansion device is designed, and an integral three-dimensional structure connected by a cantilever support structure, anchor structure and drainage structure is adopted. The traditional bolt connection method is abandoned. The comb-tooth plate of the cantilever support structure is welded at a 45° corner with the dark anchor. The support is used to support the comb-tooth plate, and a pull-out drainage plate is installed at the beam joint to achieve the closed-loop drainage function.
It effectively avoids the disadvantage that anchor bolts are easy to loosen, increases the service life of the telescopic device, reduces vibration and noise when passing through the car, improves impact load-bearing capacity and durability, and achieves good drainage and pollution prevention effects.
Smart Images
Figure CN222685252U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present disclosure belong to the technical field of bridges, and specifically relate to a comb-tooth type bridge expansion and contraction device and a bridge. Background Art
[0002] With the rapid development of economy and urbanization, the public's demand for road traffic and the quality of traffic are constantly increasing, and the requirements for automobile travel safety and comfort are further improved. The bridge expansion device plays a vital role in bridge traffic safety and comfort.
[0003] At present, the expansion devices of bridges generally adopt modular or comb-tooth plate expansion devices. The common modular expansion devices of bridges are simple in structure and durable. However, when a car passes through the modular expansion device at high speed, the straight seam between the car and the modular expansion device will cause bumps. Even if the shock absorption system of the vehicle works, the vibration and noise transmitted to the car seriously affect the driving and riding experience. Although the noise and vibration are small when the car passes through the comb-tooth plate expansion device at high speed, the traditional comb-tooth expansion device is composed of multiple parts assembled and bolted together, and has poor integrity. The load impact and vibration generated when the car passes at high speed can easily cause the fastening bolts to loosen, the comb plate to tilt and deform, the parts to fatigue and damage, and the gaps to be blocked by debris to affect the function. If the management and maintenance are not timely, it is easy to cause damage, and in serious cases, it may cause traffic accidents.
[0004] Therefore, how to solve the above problems has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content
[0005] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a comb-tooth type bridge expansion device and a bridge.
[0006] According to a first aspect of an embodiment of the present disclosure, there is provided a comb-tooth bridge expansion and contraction device, the expansion and contraction device being arranged between two adjacent beams of the bridge, the expansion and contraction device comprising a cantilever support structure and an anchoring structure correspondingly arranged on the two beams; the anchoring structure is connected to the cantilever support structure for fixing the cantilever support structure to the beam; and
[0007] A drainage structure is arranged in the beam seam between two beam bodies; the opposite ends of the drainage structure are respectively connected to the structure body composed of the cantilever support structure and the anchor structure on both sides; wherein the cantilever support structures on two adjacent beam bodies are arranged in a tooth-shaped bite-type arrangement; the drainage structure includes two fixing members and a pull-out drainage board; the fixing members are respectively connected to the cantilever support structure and the anchor structure; the fixing member has a slot portion; the opposite ends of the pull-out drainage board are respectively arranged in the slot portion;
[0008] The pull-out drain board includes a board body and a pull-out structure arranged at opposite ends of the board body, wherein the pull-out structure is movably connected to the slot of the slot part so that the pull-out drain board can be pulled and moved in the length direction of the slot part through the pull-out structure.
[0009] Optionally, the cantilever support structure includes a comb plate, a support member and a hidden anchor member; the comb plate and the hidden anchor member are arranged at an angle to jointly constitute a cantilever load-bearing skeleton; the support member is arranged within the angle between the comb plate and the hidden anchor member.
[0010] Optionally, the comb plate has a plurality of comb teeth arranged at intervals; the supporting members are multiple; wherein the multiple supporting members are arranged in a one-to-one correspondence with the multiple comb teeth.
[0011] Optionally, the comb plate and the hidden anchor are arranged at an angle of 45°; the support member includes an isosceles right triangle structural member; wherein the isosceles right triangle structural member is adapted to be installed at the angle between the comb plate and the hidden anchor, so as to support the comb plate.
[0012] Optionally, the comb plate includes a cantilever plate located at the beam gap, and a tail plate connected to the cantilever plate;
[0013] The anchoring structure comprises an anchoring stiffening rib plate and an anchoring portion; the anchoring stiffening rib plate is respectively connected to the tail plate and the concealed anchor; and the anchoring portion is used to fix the anchoring stiffening rib plate to the beam body.
[0014] Optionally, the anchoring portion includes a pre-embedded anchor and a horizontal anchor; the pre-embedded anchor is used for vertically anchoring the anchoring stiffening rib plate; and the horizontal anchor is used for horizontally anchoring the anchoring stiffening rib plate.
[0015] Optionally, the anchoring stiffening rib plate includes a relative horizontal stiffening top plate and a relative horizontal stiffening bottom plate, and a relative stiffening inclined plate and a stiffening vertical plate;
[0016] The horizontal stiffening top plate is connected to the tail plate; the stiffening inclined plate is connected to the concealed anchor; the embedded anchor is used to vertically anchor the stiffening vertical plate to the beam body; the horizontal anchor is used to horizontally anchor the horizontal stiffening bottom plate to the beam body.
[0017] Optionally, the pull-out type drain board includes a pull-out type rubber drain board.
[0018] Optionally, the slot portion is embedded in the beam body; wherein the slot portion is fixedly connected to the lower edge of the concealed anchor and is connected to the anchoring stiffening rib plate.
[0019] According to a second aspect of an embodiment of the present disclosure, a comb-tooth bridge is provided, comprising a beam body and the above-mentioned telescopic device arranged between adjacent beam bodies.
[0020] The beneficial effects of the embodiments of the present disclosure include:
[0021] In the present invention, the cantilever support structure, the anchoring structure and the drainage structure are connected to form an integral three-dimensional structure, and the telescopic device structure as a whole is used as the structural force system, abandoning the traditional bolt connection method, avoiding the disadvantage of easy loosening of the anchor bolts, and effectively increasing the service life of the telescopic device. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a schematic diagram of the transverse cross-sectional structure of a comb-tooth type telescopic device according to one embodiment of the present disclosure;
[0023] Figure 2 It is a structural schematic diagram of the telescopic working changes of a comb-tooth type telescopic device according to one embodiment of the present disclosure;
[0024] Figure 3 is a schematic diagram of the planar structure of a comb plate according to another embodiment of the present disclosure;
[0025] Figure 4 It is a partially enlarged structural schematic diagram of a drainage structure of an embodiment of the present disclosure, wherein the relative position relationship between the fixing member and the pull-out drainage board is illustrated.
[0026] In the figure, 1. comb plate; 2. concealed anchor; 3. support; 4. anchoring stiffening rib plate; 5. anchoring part; 6. fixing part; 7. pull-out drainage plate; 41. horizontal stiffening top plate; 42. horizontal stiffening bottom plate; 43. stiffening inclined plate; 44. stiffening vertical plate; 51. embedded anchor; 52. horizontal anchor; 61. slot; 71. plate body; 72. pull-out structure. DETAILED DESCRIPTION
[0027] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0028] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments. In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the error tolerance range. "Parallel" is not parallel in the strict sense, but within the error tolerance range.
[0029] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0030] like Figure 1-4 As shown, a comb-tooth bridge expansion and contraction device is arranged between two adjacent beams of the bridge, and the expansion and contraction device includes a cantilever support structure and an anchoring structure correspondingly arranged on the two beams. The anchoring structure is connected to the cantilever support structure, and is used to fix the cantilever support structure to the beam, and a drainage structure is arranged in the beam gap between the two beams, and the opposite ends of the drainage structure are respectively connected to the structure composed of the cantilever support structure and the anchoring structure on both sides, wherein the cantilever support structures on the two adjacent beams are arranged in a tooth-like interlocking manner. The drainage structure includes two fixing members 6 and a pull-out drainage board 7, and the fixing member 6 is respectively connected to the cantilever support structure and the anchoring structure. The fixing member 6 has a slot portion 61, and the opposite ends of the pull-out drainage board 7 are respectively arranged in the slot portion 61.
[0031] Furthermore, the pull-out drain plate 7 includes a plate body 71 and a pull-out structure 72 disposed at opposite ends of the plate body 71, wherein the pull-out structure 72 is movably connected to the slot of the slot portion 61, so that the pull-out drain plate 7 can be pulled and moved in the length direction of the slot portion 61 through the pull-out structure 72, thereby realizing the replacement of the plate body 71. In the present disclosure, the pull-out drain plate 7 is disposed between the beam seams, realizing the closed-loop drainage function of the telescopic device, and the above-mentioned arrangement also facilitates the maintenance and replacement of the plate body 71, thereby improving the user experience.
[0032] In the present invention, the cantilever support structure, the anchoring structure and the drainage structure are connected to form an integral three-dimensional structure, and the telescopic device structure as a whole is used as the structural force system, abandoning the traditional bolt connection method, avoiding the disadvantage of easy loosening of the anchor bolts, and effectively increasing the service life of the telescopic device.
[0033] In some embodiments, the cantilever support structure includes a comb plate 1, a support member 3 and a hidden anchor 2. The comb plate 1 and the hidden anchor 2 are arranged at an angle to jointly form a cantilever force-bearing skeleton, and the support member 3 is arranged within the angle between the comb plate 1 and the hidden anchor 2 to form a cantilever force-bearing structure. In the present disclosure, the comb plate 1 and the hidden anchor 2 are designed at an angle, and the support member 3 is used to support the comb plate 1, which can jointly form a three-dimensional force-bearing structure, so that the bearing capacity against repeated impacts of automobiles is stronger. In some embodiments, the comb plate 1 is a comb panel.
[0034] In some embodiments, the comb plate 1 has a plurality of comb teeth arranged at intervals, and there are a plurality of support members 3, wherein the plurality of support members 3 are arranged one-to-one with the plurality of comb teeth. With this arrangement, each comb tooth can be designed to be supported and strengthened, so that the force on each comb tooth is maximized.
[0035] In some embodiments, the comb plate 1 and the hidden anchor 2 are arranged at an angle of 45°, and the support member 3 includes an isosceles right triangle structural member, wherein the isosceles right triangle structural member is adapted to be installed at the angle between the comb plate 1 and the hidden anchor 2, and is used to support the comb plate 1. In the present disclosure, the comb plate 1 and the hidden anchor 2 are designed at an angle of 45°, which can maximize the force of the comb plate 1 and ensure a stronger bearing capacity against repeated impacts of automobiles. It can be understood that the angle between the comb plate 1 and the hidden anchor 2 includes but is not limited to 45°, and the specific angle is set as required.
[0036] In some embodiments, the support member 3 is an isosceles right triangle support steel plate, and the hidden anchor member 2 is a hidden anchor steel plate.
[0037] In some embodiments, the comb plate 1 includes a cantilever plate located at the beam gap and a tail plate connected to the cantilever plate. Specifically, at the connection interface between the comb plate 1 and the hidden anchor 2, the comb plate 1 includes a cantilever plate at the beam gap and a tail plate connected to the anchor stiffening rib plate 4.
[0038] The anchoring structure comprises an anchoring stiffening rib plate 4 and an anchoring portion 5. The anchoring stiffening rib plate 4 is connected to the tail plate and the concealed anchor 2 respectively. The anchoring portion 5 is used to fix the anchoring stiffening rib plate 4 to the beam body.
[0039] In the present disclosure, the concealed anchor 2 and the tail plate are respectively connected to the anchoring stiffening rib plate 4, which can effectively fix the comb plate 1. The anchoring stiffening rib plate 4 is fixed to the beam body through the anchoring part 5, which can ensure the connection reliability of the comb plate 1.
[0040] In some embodiments, the material of the anchoring portion 5 is steel bars.
[0041] In some embodiments, the anchoring portion 5 includes a pre-embedded anchor 51 and a horizontal anchor 52, wherein the pre-embedded anchor 51 is used to vertically anchor the anchoring stiffening rib plate 4, and the horizontal anchor 52 is used to horizontally anchor the anchoring stiffening rib plate 4. The pre-embedded anchor 51 and the horizontal anchor 52 are used to vertically and horizontally anchor the anchoring stiffening rib plate 4, respectively, which can significantly improve the anchoring effect of the anchoring stiffening rib plate 4.
[0042] In some embodiments, the anchoring stiffening rib plate 4 includes opposite horizontal stiffening top plates 41 and horizontal stiffening bottom plates 42 , as well as opposite stiffening inclined plates 43 and stiffening vertical plates 44 .
[0043] The horizontal stiffening top plate 41 is connected to the tail plate of the comb plate 1, and the stiffening inclined plate 43 is connected to the hidden anchor 2. The embedded anchor 51 is used to vertically anchor the stiffening vertical plate 44 to the beam body, and the horizontal anchor 52 is used to horizontally anchor the horizontal stiffening bottom plate 42 to the beam body. In a specific example, the anchoring stiffening rib plate 4 is a hexagonal frame structure, which has a relative horizontal stiffening top plate 41 and a horizontal stiffening bottom plate 42, as well as a relative stiffening inclined plate 43 and a stiffening vertical plate 44.
[0044] In the present disclosure, the above-mentioned arrangement can be used to effectively anchor the anchor stiffening rib 4, thereby ensuring the stability of the connection between the telescopic device and the beam body.
[0045] In some embodiments, the drainage structure includes two fixing members 6 and a pull-out drainage plate 7, and the fixing members 6 are respectively connected to the concealed anchor member 2 of one side beam and the anchor stiffening rib plate 4. The fixing member 6 has a slot portion 61, and the opposite ends of the pull-out drainage plate 7 are respectively correspondingly arranged in the slot portions 61 of the beams on both sides.
[0046] In some embodiments, the fixing member 6 is made of a steel plate. In some embodiments, the slot portion 61 has a slot of a profiled thin steel plate.
[0047] In some embodiments, the pull-out drain board 7 is a pull-out rubber drain board.
[0048] In some embodiments, the slot portion 61 is embedded in the beam body, wherein the slot portion 61 is fixed to the lower edge of the concealed anchor 2 and is connected to the anchoring stiffening rib plate 4 .
[0049] According to a second aspect of an embodiment of the present disclosure, a comb-tooth bridge is provided. The comb-tooth bridge includes a beam body and the above-mentioned telescopic device arranged between adjacent beam bodies.
[0050] The shock-absorbing, noise-reducing and durable comb-tooth bridge expansion device disclosed in the present invention comprises a cantilever support structure anchored in the beam body, an anchoring structure and a drainage structure. The cantilever support structure is welded into an integrated structure by a comb plate 1, an isosceles right triangle support steel plate (support member 3) and a concealed anchor steel plate (concealed anchor member 2). The anchoring structure is composed of an anchoring stiffening rib plate 4 and an anchoring part 5. The drainage structure is composed of a fixing member 6 with a corrugated thin steel plate slot and a pull-out rubber drainage plate.
[0051] The hidden anchor steel plate of the cantilever support structure is welded to the anchor stiffening rib plate 4 of the anchor structure, and then connected to the anchor stiffening rib plate 4 through the embedded anchor 51 and the horizontal anchor 52, forming a force-bearing whole with the beam body. After the fixing member 6 with the profiled thin steel plate slot is welded to the hidden anchor 2 and the anchor stiffening rib plate 4, a pull-out rubber drainage plate is installed in the profiled thin steel plate slot to form a strict drainage and anti-fouling structure. After the vertical anchor stiffening rib plate 4 is set at the bottom of the comb-tooth panel, the plate-type structure force system is converted into the cantilever support structure force system, which not only effectively increases the cross-sectional strength and rigidity of the cantilever end of the telescopic device, but also maximizes the use of the cantilever structure space. As a result, the comb-tooth telescopic device disclosed in the present invention inherits the advantages of shock absorption and noise reduction of the ordinary comb-tooth telescopic device, and takes into account the characteristics of the modular telescopic device that is strong and durable, easy to maintain, and has excellent drainage and anti-fouling effects.
[0052] Specifically, the present invention uses a welding process to weld the comb plate 1, the isosceles right triangle supporting steel plate, the hidden anchor steel plate (hidden anchor 2), the anchor stiffening rib plate 4 and the fixing part 6 with a corrugated thin steel plate slot into an integral cantilever support structure, and the cantilever support structure is then connected to the embedded anchor steel bars (embedded anchor 51) in the reserved groove at the beam end, so that the bridge expansion device of the present invention can not only reduce shock and noise, but also has a strong bearing capacity, is sturdy and durable, and is easy to maintain.
[0053] In a specific example provided by the present disclosure, a cantilever support structure is formed by welding a horizontal comb-tooth panel and a hidden anchor steel plate (hidden anchor 2) at an angle of 45° to form a cantilever load-bearing skeleton, and an isosceles right-angled triangle support steel plate (support 3) is welded on the inner inclined surface of the angle, and the number of the isosceles right-angled triangle support steel plates corresponds to the comb teeth to form an integral cantilever load-bearing structure.
[0054] The anchoring structure is composed of an anchoring stiffening rib plate 4 welded to the lower end of the cantilever support structure and an anchoring portion 5. The anchoring portion 5 includes a beam body embedded anchoring steel bar (embedded anchoring piece 51), and a horizontal anchoring steel bar (horizontal anchoring piece 52) connecting the embedded anchoring steel bar and the anchoring stiffening rib plate 4. The cantilever support structure and the beam body are firmly combined into a force-bearing whole through the anchoring structure.
[0055] Specifically, the cantilever support structure is connected to the beam body as a whole by welding the stiffening rib plate 4 to the bottom of the rear end of the comb panel and the lower part of the hidden anchor 2, and then connected to the beam body through the horizontal anchor 52 and the embedded anchor 51.
[0056] The drainage structure consists of a fixing member 6 with a corrugated thin steel plate slot and a pull-out rubber drainage board. The fixing member 6 with a corrugated thin steel plate slot is welded to the lower edge of the hidden anchor steel plate and is welded to the anchor stiffening rib plate 4 to ensure a stable connection and to serve as a template when pouring concrete. The pull-out rubber drainage board is installed in the corrugated thin steel plate slot to form a closed-loop drainage structure.
[0057] The shock-absorbing, noise-reducing and durable comb-tooth telescopic device provided by the present disclosure has the following advantages:
[0058] The cantilever comb-tooth bridge expansion device provided by the present invention is converted from a conventional "plate-type" structural system to a "cantilever" structural system by arranging a vertical anchor stiffening rib plate 4 in the angle between the bottom of the comb-tooth panel and the hidden anchor steel plate to form a cantilever bracket structure. This can effectively increase the cross-sectional inertia moment and cross-sectional stiffness of the load-bearing end of the expansion device, effectively resist the warping deformation and fatigue resistance of the comb-tooth panel caused by long-term impact loads, and significantly improve the service life and durability of the expansion device.
[0059] The present invention adopts an integrated structure composed of a cantilever support structure, an anchoring structure and a drainage structure, which is anchored on the bridge component as a whole, and uses the entire telescopic device structure as a structural force system, abandons the traditional bolt connection method, avoids the disadvantage of easy loosening of anchor bolts, and effectively increases the service life of the telescopic device.
[0060] The cantilever comb-tooth bridge expansion device provided by the present disclosure has the comb teeth of the comb-tooth panel arranged in a tooth-shaped bite-type manner on the beam body on both sides of the beam joint. The comb teeth of the comb-tooth panel of the expansion device are all displaced or rotated along the center line of the structural joint. The expansion and deflection changes of the beam body due to the change of ambient temperature cause the height difference change caused by the warping of the beam end. The comb teeth bite-type arrangement will not touch each other, and has no impact on the structural safety.
[0061] The comb-tooth type telescopic device provided by the present invention adopts a comb-tooth panel with comb teeth arranged in a tooth-like interlocking manner. When a car passes by quickly, the wheels pass over the comb-tooth plate 1 without any gaps and no bumpy feeling is generated. This reduces the vertical inertial impact force on the telescopic device generated when the vehicle passes, reduces the vibration and noise generated when the vehicle passes, and increases the service life of the telescopic device, thereby improving its durability.
[0062] The waterproof measure adopted by the present disclosure is to set a fixing member 6 with a profiled thin steel plate slot at the bottom of the telescopic device, and install a pull-out rubber drainage plate in the slot of the slot portion 61 of the fixing member 6. The drainage structure is anti-pollution, simple in structure, easy to clean, maintain and replace, so it has good waterproof effect, low operation and maintenance rate, long service life and outstanding economic benefits.
[0063] The cantilever support structure is formed by welding the comb plate 1 and the hidden anchor 2 at a 45° angle to form a three-dimensional cantilever force-bearing structure. Specifically, an isosceles right triangle support 3 is welded correspondingly within the 45° angle between the comb teeth of the comb plate 1 and the hidden anchor, and a support reinforcement design is performed on each comb tooth of the comb plate 1 to maximize the force on each comb tooth.
[0064] The comb-tooth type bridge expansion device disclosed in the present invention adopts an integral three-dimensional structure design, which is easy to install and has a strong bearing capacity to resist repeated impacts of automobiles. The drainage structure adopts a pull-out design for easy replacement. Debris can fall directly onto the rubber drainage plate through the gaps of the comb-tooth plate 1 on the beams on both sides for easy cleaning. It is durable and has shock-absorbing and noise-reducing properties.
[0065] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.
Claims
1. A comb-tooth bridge expansion and contraction device, which is arranged between two adjacent beams of the bridge, characterized in that: The telescopic device comprises a cantilever support structure and an anchoring structure respectively arranged on the two beam bodies; the anchoring structure is connected to the cantilever support structure and is used to fix the cantilever support structure to the beam body; as well as, A drainage structure is arranged in the beam seam between two beam bodies; the opposite ends of the drainage structure are respectively connected to the structure body composed of the cantilever support structure and the anchor structure on both sides; wherein the cantilever support structures on two adjacent beam bodies are arranged in a tooth-shaped bite-type arrangement; the drainage structure includes two fixing members and a pull-out drainage board; the fixing members are respectively connected to the cantilever support structure and the anchor structure; the fixing member has a slot portion; the opposite ends of the pull-out drainage board are respectively arranged in the slot portion; The pull-out drain board includes a board body and a pull-out structure arranged at opposite ends of the board body; wherein the pull-out structure is movably connected to the slot of the slot part, so that the pull-out drain board can be pulled and moved in the length direction of the slot part through the pull-out structure.
2. A comb-tooth bridge expansion device according to claim 1, characterized in that: The cantilever support structure includes a comb plate, a support member and a hidden anchor member; the comb plate and the hidden anchor member are arranged at an angle to jointly form a cantilever force-bearing skeleton; the support member is arranged within the angle between the comb plate and the hidden anchor member.
3. A comb-tooth bridge expansion device according to claim 2, characterized in that: The comb plate has a plurality of comb teeth arranged at intervals; there are a plurality of support members; wherein the plurality of support members are arranged in a one-to-one correspondence with the plurality of comb teeth.
4. The comb-tooth bridge expansion device according to claim 2, characterized in that: The comb plate and the hidden anchor are arranged at an angle of 45°; the support member includes an isosceles right triangle structure member; wherein the isosceles right triangle structure member is adapted to be installed at the angle between the comb plate and the hidden anchor member, so as to support the comb plate.
5. The comb-tooth bridge expansion device according to claim 2, characterized in that: The comb plate includes a cantilever plate located at the beam gap, and a tail plate connected to the cantilever plate; The anchoring structure comprises an anchoring stiffening rib plate and an anchoring portion; the anchoring stiffening rib plate is respectively connected to the tail plate and the concealed anchor; and the anchoring portion is used to fix the anchoring stiffening rib plate to the beam body.
6. The comb-tooth bridge expansion device according to claim 5, characterized in that: The anchoring part includes a pre-embedded anchor and a horizontal anchor; the pre-embedded anchor is used for vertically anchoring the anchoring stiffening rib plate; the horizontal anchor is used for horizontally anchoring the anchoring stiffening rib plate.
7. The comb-tooth bridge expansion device according to claim 6, characterized in that: The anchoring stiffening rib plate comprises a relative horizontal stiffening top plate and a relative horizontal stiffening bottom plate, and a relative stiffening inclined plate and a stiffening vertical plate; The horizontal stiffening top plate is connected to the tail plate; the stiffening inclined plate is connected to the concealed anchor; the embedded anchor is used to vertically anchor the stiffening vertical plate to the beam body; the horizontal anchor is used to horizontally anchor the horizontal stiffening bottom plate to the beam body.
8. The comb-tooth bridge expansion device according to claim 1, characterized in that: The pull-out type drain board comprises a pull-out type rubber drain board.
9. The comb-tooth bridge expansion device according to claim 5, characterized in that: The slot portion is embedded in the beam body; wherein the slot portion is fixedly connected to the lower edge of the concealed anchor and is connected to the anchoring stiffening rib plate.
10. A comb-tooth bridge, characterized in that: The comb-tooth bridge includes a beam body, and a telescopic device as described in any one of claims 1 to 9 arranged between adjacent beam bodies.