Chain wheel rotating body structure in narrow space

Abstract

The invention discloses a chain wheel swivel structure in a narrow space, and belongs to the technical field of bridge swivel construction. A spherical hinge assembly is mounted in the center of the top of a pier, a turntable and a cylindrical expanded concrete structure are poured on the spherical hinge assembly, and positioning profile steel is vertically mounted and fixed through pouring of the pier, the turntable and concrete of the expanded concrete structure; the annular lower slide way is mounted below a cylindrical expanded concrete structure on the bottom surface of a bridge, and the inverted detachable supporting foot is fixed through a bolt pre-buried at the top of a pier and is annularly arranged below the lower slide way; a chain is fixed on the curved surface of the top side surface of the turntable; a chain wheel fixed on the hydraulic motor is meshed with the chain; the hydraulic motor is installed on a motor supporting base fixed to the top of the pier through a bolt. Torque is stably output through the hydraulic motor installed on the top of the bridge pier, the chain wheel is driven, the chain is driven, and bridge rotation is stable and constant in speed.

Description

Technical Field

[0001] The invention relates to the technical field of bridge rotation construction, and in particular to a sprocket rotation structure in a narrow space. Background Art

[0002] Traditional bridge rotation construction technology is widely used in construction-restricted sites such as crossing deep valleys and rapids and highway-railway interchanges due to its advantages of safety, reliability, and little impact on traffic under the bridge. Existing rotation construction mainly includes pier bottom rotation and pier top rotation. Pier top rotation construction refers to the use of continuous jacks at the pier top position to pull the steel strands embedded in the turntable to drive the bridge rotation after the bridge structure is formed at a non-design axis position.

[0003] Pier top rotation only needs to rotate the bridge beam during the rotation process to reduce the rotation mass. However, the installation of the embedded steel strand traction cable is complicated, and the use of continuous jacks and reaction seats requires a large pier top working space. The traditional pier top rotation system has difficulties such as long construction period, difficult construction operation, and small pier top working space.

[0004] In view of the above problems, it is necessary to propose a swivel structure that saves space and allows the equipment to be simply arranged in a small space. Summary of the invention

[0005] The purpose of the present invention is to provide a sprocket rotating body structure in a narrow space to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides a sprocket rotating structure in a narrow space, comprising:

[0007] A ball joint assembly, wherein the ball joint assembly is installed at the middle of the top end of the pier;

[0008] A turntable, the turntable is cast on the top of the ball joint assembly, and the top of the turntable is used to set the bridge structure;

[0009] A supporting mechanism, wherein the supporting mechanism is detachably mounted on the top of the bridge pier, the supporting mechanism is arranged along the circumferential direction of the ball joint assembly, and the supporting mechanism is used to support the bridge structure during the rotation process;

[0010] The driving system includes a hydraulic motor installed on the top of the pier, a sprocket is fixedly connected to the output shaft of the hydraulic motor, a chain is fixedly arranged on the outer wall of the turntable, and the sprocket is engaged with the chain.

[0011] Preferably, bolts are pre-embedded in the top of the pier, and the support mechanism and the hydraulic motor are detachably mounted on the top of the pier via the bolts.

[0012] Preferably, the supporting mechanism comprises a plurality of inverted detachable legs, the plurality of inverted detachable legs are arranged at equal intervals along the circumferential direction of the turntable, and the top ends of the plurality of inverted detachable legs are flush, and the bottoms of the inverted detachable legs are detachably mounted on the bridge piers by the bolts; a lower slide is fixedly mounted on the bottom of the bridge structure, the lower slide is an annular structure, and the lower slide is coaxially arranged with the turntable, and the inverted detachable legs are arranged corresponding to the lower slide.

[0013] Preferably, a gap of 1 cm to 2 cm is provided between the inverted detachable support foot and the lower slideway.

[0014] Preferably, the number of the inverted detachable legs is 8.

[0015] Preferably, the bridge structure comprises an enlarged concrete structure cast on the top of the turntable and a main beam cast on the top of the enlarged concrete structure, and the supporting mechanism is installed at the bottom of the enlarged concrete structure.

[0016] Preferably, the driving system further comprises a motor support seat detachably mounted on the top of the pier via the bolts, and the hydraulic motor is arranged on the top of the motor support seat.

[0017] Preferably, the drive system is provided with two groups, and the two groups of the drive system are symmetrically arranged on both sides of the turntable; the number of the hydraulic motor and the number of the sprockets in the same group of the drive system are both two.

[0018] Preferably, the top side wall of the turntable is provided with an annular protruding structure, and the annular protruding structure is provided with an installation position for installing the chain.

[0019] A construction method for a sprocket rotating structure in a narrow space comprises the following steps:

[0020] During the construction of the bridge pier, the ball joint assembly and the positioning steel are cast on the top of the bridge pier, and the bolts for installing the inverted detachable support legs and the motor support seat are embedded in the top of the bridge pier;

[0021] After the concrete strength of the poured bridge pier reaches the requirement, the inverted detachable support legs are installed by pre-buried bolts, and the height difference of the top surface of the inverted detachable support legs is controlled;

[0022] Cast a turntable, a mounting position for mounting chains and an expanded concrete structure at the top of the ball joint assembly, and embed positioning steel in the turntable and the expanded concrete structure;

[0023] After the strength of the expanded concrete structure meets the requirements, cast the main beam;

[0024] Before the rotation, cut off the exposed part of the positioning steel, install the motor support seat, hydraulic motor, sprocket and chain, and make the sprocket and chain bite;

[0025] When rotating, the hydraulic motor drives the sprocket to drive the chain and the turntable to rotate;

[0026] After the rotation is completed, the motor support, hydraulic motor, sprocket and chain are removed, and concrete is poured to make the turntable and the pier a whole.

[0027] Compared with the prior art, the present invention has the following advantages and technical effects:

[0028] 1. The sprocket swivel structure in a narrow space provided by the present invention is driven by a hydraulic motor and has the characteristics of simple equipment, large torque and ultra-low speed. Compared with the use of a continuous jack, it is simple to install, occupies less space, and can operate in a narrow pier top space.

[0029] 2. The present invention uses an inverted detachable support leg and a lower slide. During the rotation process, the lower slide rotates with the beam body, and the inverted detachable support leg is fixed on the top of the pier without moving. Compared with the traditional pier top rotation method, it avoids the rotation of the support leg occupying a large amount of pier top construction space.

[0030] 3. The present invention uses a hydraulic motor, a sprocket and a chain as a driving system, which is easy to install and can be dismantled and reused after the rotation is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is an elevation view of the sprocket rotating structure in a narrow space of the present invention;

[0033] Figure 2 It is a cross-sectional view of the sprocket rotating structure in a narrow space of the present invention;

[0034] Figure 3 It is a top view of the sprocket rotating structure in a narrow space of the present invention;

[0035] In the figure: 1. ball joint assembly; 2. inverted detachable support leg; 3. turntable; 4. expanded concrete structure; 5. lower slide; 6. positioning steel; 7. chain; 8. sprocket; 9. hydraulic motor; 10. motor support seat; 11. bridge pier. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0037] like Figures 1 to 3 As shown, the present invention provides a sprocket rotating structure in a narrow space, comprising:

[0038] The ball joint assembly 1 is installed at the middle of the top of the pier 11;

[0039] The turntable 3 is cast on the top of the ball joint assembly 1, and the top of the turntable 3 is used to set the bridge structure;

[0040] A support mechanism, which is detachably mounted on the top of the pier 11 and is arranged along the circumferential direction of the ball joint assembly 1. The support mechanism is used to support the bridge structure during the rotation process;

[0041] The driving system includes a hydraulic motor 9 installed on the top of the pier 11 , a sprocket 8 is fixedly connected to the output shaft of the hydraulic motor 9 , a chain 7 is fixedly provided on the outer wall of the turntable 3 , and the sprocket 8 is engaged with the chain 7 .

[0042] According to a further optimized solution, bolts are pre-buried on the top of the pier 11, and the supporting mechanism and the hydraulic motor 9 are detachably mounted on the top of the pier 11 by means of the bolts.

[0043] A further optimized solution is provided, in which the supporting mechanism comprises a plurality of inverted and detachable legs 2, which are arranged at equal intervals along the circumferential direction of the turntable 3, and the top ends of the plurality of inverted and detachable legs 2 are flush, and the bottom ends of the inverted and detachable legs 2 are detachably mounted on the pier 11 by bolts; a lower slide 5 is fixedly mounted on the bottom of the bridge structure, the lower slide 5 is a ring structure, and the lower slide 5 is coaxially arranged with the turntable 3, and the inverted and detachable legs 2 and the lower slide 5 are arranged correspondingly.

[0044] According to a further optimized solution, a gap of 1 cm to 2 cm is provided between the inverted detachable support foot 2 and the lower slideway 5 .

[0045] According to a further optimized solution, the number of the inverted detachable legs 2 is 8.

[0046] According to a further optimized solution, the bridge structure includes an expanded concrete structure 4 cast on the top of the turntable 3 and a main beam cast on the top of the expanded concrete structure 4 , and the supporting mechanism is installed at the bottom of the expanded concrete structure 4 .

[0047] According to a further optimized solution, the driving system further includes a motor support seat 10 which is detachably mounted on the top of the pier 11 by bolts, and the hydraulic motor 9 is arranged on the top of the motor support seat 10 .

[0048] According to a further optimization scheme, two drive systems are provided, and the two drive systems are symmetrically arranged on both sides of the turntable 3; the number of hydraulic motors 9 and sprockets 8 in the same drive system is two.

[0049] According to a further optimization scheme, the top side wall of the turntable 3 is provided with an annular protruding structure, and an installation position for installing the chain 7 is provided on the annular protruding structure.

[0050] A construction method for a sprocket rotating structure in a narrow space comprises the following steps:

[0051] During the construction of the pier 11, the ball joint assembly 1 and the positioning steel 6 are cast on the top of the pier 11, and bolts for installing the inverted detachable support legs 2 and the motor support seat 10 are pre-buried on the top of the pier 11;

[0052] After the concrete strength of the cast bridge pier 11 reaches the required level, the inverted detachable support leg 2 is installed by pre-buried bolts, and the height difference of the top surface of the inverted detachable support leg 2 is controlled;

[0053] Cast a turntable 3, an installation position for installing a chain 7 and an expanded concrete structure 4 at the top of the ball joint assembly 1, and pre-embed the positioning steel 6 in the turntable 3 and the expanded concrete structure 4;

[0054] After the strength of the expanded concrete structure 4 meets the requirements, the main beam is cast;

[0055] Before the rotation, the exposed part of the positioning steel 6 is cut off, and the motor support seat 10, the hydraulic motor 9, the sprocket 8 and the chain 7 are installed, and the sprocket 8 and the chain 7 are engaged;

[0056] During the rotation, the hydraulic motor 9 drives the sprocket 8 to drive the chain 7 and the turntable 3 to rotate; after the positioning steel 6 is removed and during the rotation, if the bridge tilts, the lower slide 5 will contact the inverted detachable support leg 2 to ensure the safety and stability of the bridge during the rotation;

[0057] After the rotation is completed, the motor support seat 10, the hydraulic motor 9, the sprocket 8 and the chain 7 are removed and reused, and concrete is poured to make the turntable 3 and the bridge pier 11 become a whole.

[0058] The above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A sprocket rotating structure in a narrow space, characterized in that: include: A ball joint assembly (1), wherein the ball joint assembly (1) is installed at the middle of the top end of the bridge pier (11); A turntable (3), the turntable (3) is cast on the top of the ball joint assembly (1), and the top of the turntable (3) is used to set the bridge structure; A support mechanism, the support mechanism is detachably mounted on the top of the bridge pier (11), the support mechanism is arranged along the circumferential direction of the ball joint assembly (1), and the support mechanism is used to support the bridge structure during the rotation process; A drive system, the drive system comprising a hydraulic motor (9) installed on the top of the pier (11), a sprocket (8) fixedly connected to the output shaft of the hydraulic motor (9), a chain (7) fixedly arranged on the outer wall of the turntable (3), and the sprocket (8) meshing with the chain (7).

2. The sprocket rotating structure in a narrow space according to claim 1, characterized in that: Bolts are pre-buried on the top of the pier (11), and the support mechanism and the hydraulic motor (9) are detachably mounted on the top of the pier (11) via the bolts.

3. The sprocket rotating structure in a narrow space according to claim 2, characterized in that: The support mechanism comprises a plurality of inverted detachable legs (2), the plurality of inverted detachable legs (2) are arranged at equal intervals along the circumferential direction of the turntable (3), and the top ends of the plurality of inverted detachable legs (2) are flush, and the bottoms of the inverted detachable legs (2) are detachably mounted on the bridge pier (11) by means of the bolts; a lower slideway (5) is fixedly mounted on the bottom of the bridge structure, the lower slideway (5) is an annular structure, and the lower slideway (5) is coaxially arranged with the turntable (3), and the inverted detachable legs (2) and the lower slideway (5) are arranged correspondingly.

4. The sprocket rotating structure in a narrow space according to claim 3, characterized in that: A gap of 1 cm to 2 cm is provided between the inverted detachable support foot (2) and the lower slideway (5).

5. The sprocket rotating structure in a narrow space according to claim 3, characterized in that: The number of the inverted detachable legs (2) is 8.

6. The sprocket rotating structure in a narrow space according to claim 1, characterized in that: The bridge structure comprises an enlarged concrete structure (4) cast on the top of the turntable (3) and a main beam cast on the top of the enlarged concrete structure (4), and the supporting mechanism is installed at the bottom of the enlarged concrete structure (4).

7. The sprocket rotating structure in a narrow space according to claim 2, characterized in that: The driving system also includes a motor support seat (10) which is detachably mounted on the top of the pier (11) via the bolts, and the hydraulic motor (9) is arranged on the top of the motor support seat (10).

8. The sprocket rotating structure in a narrow space according to claim 1, characterized in that: The drive system is provided in two groups, and the two groups of the drive system are symmetrically arranged on both sides of the rotating disk (3); the number of the hydraulic motor (9) and the number of the sprocket (8) in the same group of the drive system are both two.

9. The sprocket rotating structure in a narrow space according to claim 7, characterized in that: The top side wall of the rotating disk (3) is provided with an annular protruding structure, and a mounting position for mounting the chain (7) is provided on the annular protruding structure.

10. A construction method for a sprocket rotating structure in a narrow space according to any one of claims 1 to 9, characterized in that: The following steps are involved: During the construction of the bridge pier (11), the ball joint assembly (1) and the positioning steel (6) are cast on the top of the bridge pier (11), and bolts for installing the inverted detachable support foot (2) and the motor support seat (10) are pre-buried on the top of the bridge pier (11); After the concrete strength of the poured bridge pier (11) reaches the required level, the inverted detachable support leg (2) is installed by pre-buried bolts, and the height difference of the top surface of the inverted detachable support leg (2) is controlled; Casting a turntable (3), an installation position for installing a chain (7) and an expanded concrete structure (4) at the top of the ball joint assembly (1), and pre-embedding a positioning steel (6) in the turntable (3) and the expanded concrete structure (4); After the strength of the expanded concrete structure (4) meets the requirements, the main beam is cast; Before the rotation, the exposed part of the positioning steel (6) is cut off, and the motor support seat (10), the hydraulic motor (9), the sprocket (8) and the chain (7) are installed, and the sprocket (8) and the chain (7) are engaged; When rotating, the hydraulic motor (9) drives the sprocket (8) to drive the chain (7) and the rotating disk (3) to rotate; After the rotation is completed, the motor support seat (10), the hydraulic motor (9), the sprocket (8) and the chain (7) are removed, and concrete is poured to make the turntable (3) and the bridge pier (11) become a whole.

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