Highway bridge construction cofferdam device

Abstract

The utility model relates to the technical field of highway bridge construction, concretely is a kind of highway bridge construction cofferdam device, including the cofferdam enclosed by multiple baffle, the inside of cofferdam is equipped with inner support mechanism;Inner support mechanism includes two first supporting arm, two telescopic supporting arm and two telescopic adjusting components, two telescopic adjusting components are respectively used to adjust the interval of two first supporting arm and the interval of two telescopic supporting arm;By setting first supporting arm, telescopic supporting arm, telescopic adjusting component, drive component and clutch component, it reaches the operation mode that can let telescopic adjusting component form quick coarse adjustment and accurate fine adjustment, to switch to clutch separation state in installation initial stage, can manually quick push-pull supporting arm adjustment approximate position, after position approaches target, switch to clutch combination state, carry out accurate fine adjustment, both can let a set of inner support mechanism can adapt to the cofferdam of multiple enclosure forms, also avoid the construction scheme adjustment caused by space problem, improve the flexibility of construction scheme.

Description

Technical Field

[0001] This utility model relates to the field of highway bridge construction technology, and in particular to a cofferdam device for highway bridge construction. Background Technology

[0002] A cofferdam is a temporary protective structure used in the construction of bridge foundations in water. Its function is to block water, isolate silt, and create a dry environment for foundation construction.

[0003] A cofferdam device for highway bridge construction disclosed in Chinese Patent Publication No. CN219808393U involves installing two cofferdam straight plates and two cofferdam vertical plates, and then fixing a reinforcing frame between the two cofferdam straight plates and two cofferdam vertical plates to enhance the stability between the cofferdam straight plates and the cofferdam vertical plates and resist external impacts. However, according to cofferdam devices provided in related fields and existing technologies, the existing cofferdam internal support mechanisms are mostly customized fixed structures, and the reinforcing frame cannot be flexibly adjusted. One set of reinforcing frames can only adapt to a single size or specification of cofferdam, resulting in high equipment procurement costs, large inventory pressure, and long equipment selection and customization cycles before construction, which affects the efficiency of construction preparation. At the same time, traditional reinforcing frames are mostly integral rigid structures, which are difficult to hoist into the cofferdam as a whole. They need to be assembled in sections and spliced ​​point by point inside the cofferdam, making the installation process cumbersome. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a cofferdam device for highway bridge construction.

[0005] The objective of this utility model is achieved through the following technical solution: a cofferdam device for highway bridge construction, comprising a cofferdam composed of multiple baffles, with an internal support mechanism inside the cofferdam; the internal support mechanism includes two first arms, two telescopic arms, and two telescopic adjustment components, the two telescopic adjustment components being used to adjust the distance between the two first arms and the distance between the two telescopic arms respectively; each telescopic arm includes two second arms, with a first extension rod slidably disposed between the two second arms, and a second extension rod fixedly disposed at the end of each of the two second arms, the two second extension rods being slidably connected to the two first arms respectively; the telescopic adjustment component includes a third arm, with a third extension rod slidably disposed at both ends of the third arm, a gear rotatably disposed inside the third arm, the gear being rotatably connected to the third arm via a spline shaft, two racks symmetrically meshing on the outer surface of the gear, the two racks being fixedly connected to the two third extension rods respectively; a drive component for controlling the rotation of the gear and self-locking is provided on the outer side of the third arm, and a clutch component is provided between the drive component and the spline shaft on the third arm.

[0006] Preferably, the drive assembly includes a worm gear and a worm shaft rotatably disposed on the outside of the third arm, the worm gear meshing with the worm shaft.

[0007] Preferably, a protective cover is fixedly installed on the third arm corresponding to the position of the drive assembly, a rotating shaft is fixedly provided at the center of the worm gear, the worm and the rotating shaft are rotatably connected to the protective cover, and a drive block for controlling its rotation is fixedly provided at one end of the worm located outside the protective cover.

[0008] Preferably, the clutch assembly includes a sliding rod slidably disposed at the center of the rotating shaft, a first fixed plate fixedly disposed at one end of the splined shaft facing the sliding rod, a second fixed plate fixedly disposed at one end of the sliding rod facing the first fixed plate, a plurality of engagement blocks fixedly disposed on the side of the first fixed plate facing the second fixed plate, and engagement grooves adapted to the positions of the plurality of engagement blocks on the second fixed plate, a knob fixedly disposed at one end of the sliding rod outside the protective cover, a threaded hole being disposed at the end of the knob facing the rotating shaft, and a threaded groove adapted to the threaded hole being disposed on the outer surface of the rotating shaft.

[0009] Preferably, the protective cover is made of polycarbonate, and the protective cover has rotation holes at the positions corresponding to the worm gear and the rotating shaft.

[0010] Preferably, the drive block has a hexagonal cross-sectional shape, and the end of the drive block away from the worm gear has rounded corners.

[0011] Preferably, the sliding rod has a hexagonal cross-sectional shape, and the rotating shaft has a sliding hole that matches the position of the sliding rod.

[0012] Preferably, a connecting block is fixedly provided between the first extension rod and the third extension rod below it.

[0013] The beneficial effects of this cofferdam device for highway bridge construction are as follows: By setting up a first support arm, a telescopic support arm, a telescopic adjustment component, a drive component, and a clutch component, the telescopic adjustment component can form a working mode of rapid coarse adjustment and precise fine adjustment. In the initial stage of installation, it can switch to the clutch disengaged state, and the support arm can be manually and quickly pushed and pulled to adjust the approximate position, which greatly shortens the initial positioning time of the inner support mechanism. After the position is close to the target, it can switch to the clutch engaged state for precise fine adjustment. This allows one set of inner support mechanism to be adapted to cofferdams of different sizes and different baffle enclosure forms, and avoids the need to adjust the construction plan due to space problems, thus improving the flexibility of the construction plan. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a first-view structural schematic diagram of the internal support mechanism of this utility model;

[0017] Figure 3 This is a second-view structural schematic diagram of the internal support mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the second working state of the internal support mechanism of this utility model;

[0019] Figure 5 This is a first-view structural schematic diagram of the adjustment component of this utility model;

[0020] Figure 6 This is a structural schematic diagram of the adjustment component of this utility model from a second perspective;

[0021] Figure 7 This is a schematic diagram of the internal structure of the protective cover of this utility model;

[0022] Figure 8 This is a schematic diagram of the clutch assembly of this utility model in the disengaged state;

[0023] Figure 9 This is a schematic diagram of the engagement state of the clutch assembly of this utility model;

[0024] Figure 10 This is a schematic diagram showing the disassembled structure of the sliding rod and the rotating shaft of this utility model.

[0025] In the diagram: 1. Cofferdam; 2. First support arm; 201. Second extension rod; 3. Telescopic support arm; 301. Second support arm; 302. First extension rod; 4. Adjustment assembly; 401. Third support arm; 402. Third extension rod; 403. Gear; 404. Splined shaft; 405. Rack; 5. Drive assembly; 501. Worm gear; 502. Worm; 503. Rotating shaft; 5031. Sliding hole; 504. Drive block; 6. Clutch assembly; 601. Sliding rod; 602. First fixed plate; 603. Second fixed plate; 604. Engaging block; 605. Engaging groove; 606. Knob; 6061. Threaded hole; 7. Protective cover; 8. Connecting block. Detailed Implementation

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0028] like Figures 1 to 10 As shown, a cofferdam device for highway bridge construction includes a cofferdam 1 composed of multiple baffles. The cofferdam 1 has an internal support mechanism. The internal support mechanism includes two first arms 2, two telescopic arms 3, and two telescopic adjustment components 4. The two telescopic adjustment components 4 are used to adjust the distance between the two first arms 2 and the distance between the two telescopic arms 3, respectively. The telescopic arms 3 include two second arms 301, with a first extension rod 302 slidably disposed between the two second arms 301. A second extension rod 201 is fixedly disposed at the end of each of the two second arms 301, and the two second extension rods 201 are slidably connected to the two first arms 2, respectively. The telescopic adjustment components 4 include a third arm 401, the third arm... Both ends of the arm 401 are slidably provided with third extension rods 402. The inside of the third arm 401 is rotatably provided with gear 403. The gear 403 is rotatably connected to the third arm 401 through a spline shaft 404 (the gear 403 and the spline shaft 404 are splined). Two racks 405 are symmetrically meshed on the outer surface of the gear 403. The two racks 405 are fixedly connected to the two third extension rods 402 respectively. The outer side of the third arm 401 is provided with a drive assembly 5 for controlling the rotation of the gear 403 and self-locking. The third arm 401 is provided with a clutch assembly 6 between the drive assembly 5 and the spline shaft 404. A connecting block 8 is fixedly provided between the first extension rod 302 and the third extension rod 402 below it.

[0029] In summary, the telescopic adjustment component 4, through the meshing transmission of gear 403 and rack 405, can flexibly adjust the distance between the first support arm 2 and the telescopic support arm 3. Combined with the sliding engagement of the first extension rod 302 and the second support arm 301, and the second extension rod 201 and the first support arm 2 in the telescopic support arm 3, a single internal support mechanism can be adapted to cofferdams 1 of different sizes and baffle enclosure forms. There is no need to customize internal support equipment separately for cofferdams 1 of different specifications, which greatly reduces the equipment procurement and inventory costs for the construction party. At the same time, it also reduces the construction preparation time for equipment selection and adaptation. Compared with the problem that traditional internal support mechanisms with fixed dimensions are difficult to enter the space of narrow or irregularly shaped cofferdams 1, this mechanism can first shrink to a smaller volume and be hoisted into the cofferdam 1, and then be opened and fixed by the telescopic adjustment component 4, avoiding the adjustment of the construction plan due to space problems and improving the flexibility of the construction plan.

[0030] The drive assembly 5 includes a worm gear 501 and a worm 502 rotatably disposed on the outside of the third arm 401, with the worm gear 501 meshing with the worm 502; a protective cover 7 is fixedly installed on the third arm 401 corresponding to the position of the drive assembly 5; a rotating shaft 503 is fixedly disposed at the center of the worm gear 501; both the worm 502 and the rotating shaft 503 are rotatably connected to the protective cover 7; a drive block 504 for controlling its rotation is fixedly disposed at one end of the worm 502 outside the protective cover 7; the cross-sectional shape of the drive block 504 is hexagonal, and the end of the drive block 504 away from the worm 502 is formed with rounded corners; the protective cover 7 is made of polycarbonate, and rotating holes are opened at the positions of the worm 502 and the rotating shaft 503 on the protective cover 7 (by using the protective cover 7, the main transmission components of the drive assembly 5 can be shielded and protected, and the working status of the clutch assembly 6 can be easily observed by the staff in real time).

[0031] In summary, the self-locking characteristics of the worm gear 501 and worm 502 ensure that the outrigger is firmly fixed after being adjusted to the correct position. Even under external forces such as water pressure outside the cofferdam 1, soil lateral pressure, or construction vibration, the outrigger can be prevented from sliding, thus preventing major safety hazards such as deformation, leakage, or even collapse of the cofferdam 1 due to loose support. The high transmission ratio of the worm gear 501 and worm 502 enables precise fine-tuning of the outrigger position, allowing the first outrigger 2 and the telescopic outrigger 3 to fit tightly against the inner wall of the cofferdam 1. This ensures that the supporting force is evenly distributed on the baffle of the cofferdam 1, avoiding local stress concentration that could lead to baffle deformation or damage. This creates a dry and safe working environment for construction inside the cofferdam 1.

[0032] The clutch assembly 6 includes a sliding rod 601 slidably disposed at the center of the rotating shaft 503. The sliding rod 601 has a hexagonal cross-sectional shape. The rotating shaft 503 has a sliding hole 5031 that matches the sliding rod 601. A first fixed plate 602 is fixedly disposed at one end of the spline shaft 404 facing the sliding rod 601. A second fixed plate 603 is fixedly disposed at one end of the sliding rod 601 facing the first fixed plate 602. A plurality of engagement blocks 604 are fixedly disposed on the side of the first fixed plate 602 facing the second fixed plate 603. Engagement grooves 605 that match the engagement blocks 604 are provided on the second fixed plate 603 at the positions of the plurality of engagement blocks 604. A knob 606 is fixedly disposed at one end of the sliding rod 601 outside the protective cover 7. A threaded hole 6061 is provided at the end of the knob 606 facing the rotating shaft 503. A threaded groove that matches the threaded hole 6061 is provided on the outer surface of the rotating shaft 503.

[0033] In summary, the clutch assembly 6 enables the connection and switching between the drive assembly 5 and the spline shaft 404, forming a working mode of rapid coarse adjustment and precise fine adjustment. In the initial stage of installation, switching to the clutch disengaged state allows for manual and rapid pushing and pulling of the support arm to adjust the approximate position, eliminating the tedious steps of traditional fine adjustment and significantly shortening the initial positioning time of the inner support mechanism. Once the position is close to the target, switching to the clutch engaged state allows for precise fine adjustment through the drive assembly 5, balancing efficiency and accuracy, and resolving the contradiction of traditional inner support mechanisms being either slow to adjust or having poor accuracy.

[0034] The usage process is as follows:

[0035] S1. During construction, multiple baffles are first assembled to form a cofferdam 1. Then, by rotating the knob 606, the threaded hole 6061 is separated from the threaded groove on the outer surface of the rotating shaft 503, so that the first fixed plate 602 and the second fixed plate 603 can mesh again. At this time, the spline shaft 404 can rotate independently.

[0036] S2. The telescopic adjustment component 4, through the meshing transmission of gear 403 and rack 405, can flexibly adjust the distance between the first support arm 2 and the distance between the telescopic support arm 3. Combined with the sliding cooperation between the first extension rod 302 and the second support arm 301, and the second extension rod 201 and the first support arm 2 in the telescopic support arm 3, a set of internal support mechanisms can be adapted to cofferdams 1 of different sizes and different baffle enclosure forms. There is no need to customize internal support equipment separately for cofferdams 1 of different specifications, which greatly reduces the equipment procurement and inventory costs of the construction party, and also reduces the construction preparation time for equipment selection and adaptation.

[0037] S3. After roughly adjusting the positions of the two first support arms 2 and the two telescopic support arms 3, rotate the knob 606 to make the threaded hole 6061 connect with the threaded groove on the outer surface of the rotating shaft 503. Then, by using the cooperation of multiple engagement blocks 604 and multiple engagement grooves 605, the first fixed plate 602 and the second fixed plate 603 can be engaged again. Then, the hoisting equipment can be used to put the inner support mechanism into the cofferdam 1.

[0038] S4. After the inner support mechanism is placed inside the cofferdam 1, the worm 502 is rotated by the drive block 504. Then, the worm 502 meshes with the worm wheel 501, which allows the worm wheel 501 to control the rotation of the spline shaft 404 and gear 403 through the clutch assembly 6. This allows the inner support mechanism to be placed into the cofferdam 1 as a whole and then opened and fixed. This solves the problem of large inner supports being difficult to install directly. There is no need for complex assembly inside the cofferdam 1, which reduces the number of hoisting operations and positioning time, and significantly improves construction efficiency.

[0039] S5, the worm gear 501 and worm 502 structure of drive assembly 5 provide a mechanical self-locking function to prevent the support arm from sliding after adjustment, and ensure that the inner support mechanism maintains stable support throughout the construction period to resist water pressure and construction loads.

[0040] S6, worm gear 501 and worm 502 provide a large transmission ratio to achieve fine adjustment of the support arm position, ensuring a tight fit with the inner wall of cofferdam 1, and precise adjustment to make the supporting force evenly distributed on the inner wall of cofferdam 1, preventing local stress concentration, and ensuring the structural safety and waterproof effect of cofferdam 1.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A cofferdam device for highway bridge construction, characterized in that: It includes a cofferdam (1) composed of multiple baffles, and the cofferdam (1) is provided with an internal support mechanism; The internal support mechanism includes two first arms (2), two telescopic arms (3) and two telescopic adjustment components (4). The two telescopic adjustment components (4) are used to adjust the distance between the two first arms (2) and the distance between the two telescopic arms (3), respectively. The telescopic arm (3) includes two second arms (301), a first extension rod (302) is slidably provided between the two second arms (301), and a second extension rod (201) is fixedly provided at the end of each of the two second arms (301). The two second extension rods (201) are slidably connected to the two first arms (2) respectively. The telescopic adjustment assembly (4) includes a third arm (401), with a third extension rod (402) slidably provided at both ends of the third arm (401). A gear (403) is rotatably provided inside the third arm (401). The gear (403) is rotatably connected to the third arm (401) through a spline shaft (404). Two racks (405) are symmetrically meshed on the outer surface of the gear (403). The two racks (405) are fixedly connected to the two third extension rods (402) respectively. The outer side of the third arm (401) is provided with a drive assembly (5) for controlling the rotation of the gear (403) and self-locking. The third arm (401) is provided with a clutch assembly (6) between the drive assembly (5) and the spline shaft (404).

2. The cofferdam device for highway bridge construction according to claim 1, characterized in that: The drive assembly (5) includes a worm gear (501) and a worm (502) rotatably disposed on the outside of the third arm (401), wherein the worm gear (501) meshes with the worm (502).

3. A cofferdam device for highway bridge construction according to claim 2, characterized in that: The third arm (401) is fixedly equipped with a protective cover (7) at the position corresponding to the drive assembly (5). A rotating shaft (503) is fixedly provided at the center of the worm gear (501). The worm (502) and the rotating shaft (503) are rotatably connected to the protective cover (7). A drive block (504) for controlling its rotation is fixedly provided at one end of the worm (502) outside the protective cover (7).

4. A cofferdam device for highway bridge construction according to claim 3, characterized in that: The clutch assembly (6) includes a sliding rod (601) slidably disposed at the center of the rotating shaft (503). A first fixed plate (602) is fixedly disposed at one end of the spline shaft (404) facing the sliding rod (601). A second fixed plate (603) is fixedly disposed at one end of the sliding rod (601) facing the first fixed plate (602). A plurality of engagement blocks (604) are fixedly disposed on the side of the first fixed plate (602) facing the second fixed plate (603). The second fixed plate (603) has engagement grooves (605) that are adapted to the positions of the plurality of engagement blocks (604). A knob (606) is fixedly disposed at one end of the sliding rod (601) outside the protective cover (7). A threaded hole (6061) is disposed at one end of the knob (606) facing the rotating shaft (503). A threaded groove that is adapted to the threaded hole (6061) is disposed on the outer surface of the rotating shaft (503).

5. A cofferdam device for highway bridge construction according to claim 4, characterized in that: The protective cover (7) is made of polycarbonate, and the protective cover (7) has rotation holes at the positions corresponding to the worm (502) and the rotating shaft (503).

6. A cofferdam device for highway bridge construction according to claim 3, characterized in that: The drive block (504) has a hexagonal cross-sectional shape, and the end of the drive block (504) away from the worm (502) is rounded.

7. A cofferdam device for highway bridge construction according to claim 4, characterized in that: The sliding rod (601) has a hexagonal cross-sectional shape, and the rotating shaft (503) has a sliding hole (5031) that matches the position of the sliding rod (601).

8. A cofferdam device for highway bridge construction according to claim 1, characterized in that: A connecting block (8) is fixedly provided between the first extension rod (302) and the third extension rod (402) below it.

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