Movable bridge and water delivery tunnel maintenance working well using same

Abstract

The utility model discloses a movable bridge and a water delivery tunnel maintenance working well applying the movable bridge, the movable bridge is used for connecting a main road and a branch pipe inlet in the working well to form a passable traffic road surface, and the movable bridge comprises a bridge body; the supporting beams are parallel and opposite to the branch pipe inlets at intervals, and the two ends of each supporting beam are fixed to the main trunk road girder and the side wall of the well body respectively; the rotating mechanisms are arranged on the supporting beam at intervals and connected with one end of the bridge body, so that the bridge body is rotationally connected to the supporting beam and can be switched between the tiling position and the erecting position. At the tiling position, at least one part of the other end of the bridge body is supported on the bridge body supporting part on the inner side of the inlet of the branch pipe; at the vertical position, the size of the space between the movable bridge and the branch pipe meets the size of the space required for installing the choke plug. According to the movable bridge, the choke plugs can be installed without dismantling the movable bridge, so that the procedures of temporary building and dismantling are omitted, the operation time and the labor cost are saved, and the movable bridge is flexible and safe to use; and the erected bridge body also plays a role of a safety protective fence.

Description

Technical Field

[0001] The utility model relates to the field of maintenance work pits, in particular to a movable bridge and a water conveyance tunnel maintenance work pit using the movable bridge. Background Art

[0002] Large-scale water conservancy projects usually require several maintenance work pits, such as a work pit for the maintenance of butterfly valves in a water conveyance tunnel. A connecting traffic road needs to be set up between the main road in the work pit and the left and right branch pipe entrances in the pit to facilitate maintenance vehicles and maintenance personnel to enter the branch pipes through the traffic road for maintenance work.

[0003] Most of the existing traffic pavements connecting the main road and the branch pipe entrance are composed of temporary steel grating platforms. When maintenance is required, after removing the blind head at the branch pipe entrance, a temporary steel grating platform is built to form a traffic pavement connecting the main road and the branch pipe entrance; after the maintenance is completed, the steel grating platform must be removed, and then the blind head can be installed at the branch pipe entrance to block the branch pipe entrance. This method is time-consuming and labor-intensive to temporarily hoist, build, and dismantle the steel grating platform each time, which affects the maintenance period and increases labor costs. Utility Model Content

[0004] In view of the defects and shortcomings in the prior art, the utility model proposes a movable bridge and a water conveyance tunnel maintenance work pit using the movable bridge, so as to solve the problem that the construction of the connecting traffic pavement between the main road and the branch pipe entrance in the maintenance work pit of the water conservancy project is time-consuming and labor-intensive, which affects the maintenance period and increases labor costs.

[0005] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0006] A movable bridge is used to connect the main road in the working pit with the entrance of the branch pipe to form a traffic road for vehicles and personnel to pass in and out of the branch pipe, and comprises:

[0007] Bridge;

[0008] The support beam is parallel to the branch pipe entrance and spaced opposite to each other, and is welded along the side beam on the corresponding side of the main road, and the two ends are respectively fixed to the main beam on the corresponding side of the main road and the side wall of the well body;

[0009] Multiple sets of rotating mechanisms are arranged on the support beam at intervals and connected to one end of the bridge body, so as to realize that the bridge body can be rotatably connected to the support beam and can be rotated and switched between a flat position and an erected position; wherein,

[0010] When the bridge body is rotated to the flat position, at least a portion of the other end of the bridge body is overlapped and supported on the bridge body support portion on the inner side of the fork pipe entrance;

[0011] When the bridge body is rotated to the erected position, the space between the movable bridge and the bifurcated pipe inlet satisfies the space required for installing a blind head on the outside of the bifurcated pipe inlet.

[0012] Preferably, the branch pipe inlets are arranged at an angle relative to adjacent main beams and parallel to corresponding side beams, one end of the side beam is welded to the main beam, and the other end is fixed to the side wall of the well body.

[0013] Preferably, the beam body of the support beam is also supported and fixed by a plurality of first brackets connected to the bottom of the working well.

[0014] Preferably, each of the first brackets includes a first column and a first support plate, the first support plate is fixed to the top of the first column, and the bottom of the first column is fixed to the bottom of the working well;

[0015] The support beam is supported and fixed on the plurality of first support plates.

[0016] Preferably, each group of the rotating mechanism comprises a gear rack, which is detachably fixed to a side of the support beam parallel to and opposite to the bifurcated pipe inlet, and an upper gear and a lower gear are mounted on the gear rack, the upper gear and the lower gear are meshed with each other, and the gear shafts are parallel to the length direction of the support beam;

[0017] The upper gear is fixedly connected to one end of the upper connecting arm, the other end of the upper connecting arm is connected to one end of the bridge body, the lower gear is fixedly connected to one end of the lower connecting arm, and the other end of the lower connecting arm is connected to the counterweight;

[0018] When the bridge body is rotated to a flat position under the action of an external force, the upper connecting arm and the lower connecting arm are correspondingly rotated to a horizontal position and are closed to each other;

[0019] When the bridge body is rotated to an erected position under the action of an external force, the upper connecting arm and the lower connecting arm are correspondingly rotated to be erected and spread apart from each other.

[0020] Preferably, the gear rack is welded with a rear lining plate, and the support beam is welded with a rear back plate at intervals, and the rear lining plate of each gear rack is detachably connected to the corresponding rear back plate through a plurality of fasteners.

[0021] Preferably, it further comprises a pull rod, one end of which is hinged to the top surface of the bridge body.

[0022] Preferably, the bridge body support portion is a concrete step arranged on the inner side of the bifurcated pipe entrance.

[0023] Preferably, a notch is formed at the other end of the bridge body, and two sides of the notch respectively form a first bifurcation and a second bifurcation;

[0024] When the bridge body is in a flat position, the first fork portion is overlapped and supported on the bridge body support portion on the inner side of the fork pipe entrance, and the second fork portion is overlapped and supported on the side wall of the well body outside the fork pipe.

[0025] As a general inventive concept, the utility model also proposes a water conveyance tunnel maintenance work pit, in which a branch pipe entrance is respectively provided on the left and right sides of the main road in the work pit, and a movable bridge as described in any of the above technical solutions is provided between each branch pipe entrance and the main road.

[0026] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0027] The utility model sets a support beam along the side beam of the main road, arranges multiple groups of rotating mechanisms using gear meshing transmission at intervals on the support beam, connects one end of the bridge body through the multiple groups of rotating mechanisms, and combines the weight balance principle to realize that the bridge body can be rotatably connected to the support beam, and can be manually pulled up and lowered quickly and smoothly; when maintenance is required, after removing the blind head at the entrance of the branch pipe, the operator uses a pull rod to lower the bridge body and rotate it to a flat position, and the other end of the bridge body overlaps the bridge body support part at the entrance of the branch pipe to form a road from the main road to the branch pipe, which is convenient for operation and maintenance vehicles and maintenance personnel to pass in and out of the branch pipe. After the maintenance is completed, the operator uses the pull rod to pull up the bridge body and rotate it to the erected position and retract it, providing enough space for the installation of the blind head, and the blind head can be installed at the entrance of the branch pipe without dismantling the movable bridge, eliminating the process of temporary hoisting and building and dismantling the steel grating platform each time, greatly saving operation time and labor cost, and the erected bridge body also serves as a safety guardrail, eliminating the safety hazard of personnel and tools falling.

[0028] The movable bridge of the utility model has a simple and compact overall structure, is easy to operate, flexible to use, saves time and effort, and is reliable to install, without the need for mechanical and electrical maintenance.

[0029] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic top view of the working well of the movable bridge of the application embodiment 1 is shown, wherein the bridge body of the movable bridge is in a flat position;

[0031] Figure 2 A schematic top view of the working pit of the movable bridge of the application embodiment 1 is shown, wherein the bridge body of the movable bridge and the steel platform of the main road are not shown;

[0032] Figure 3 and Figure 4 They are shown respectively Figure 2AA cross-sectional schematic diagram and BB cross-sectional schematic diagram;

[0033] Figure 5 A schematic diagram showing a movable bridge of Example 1 in which the bridge body is in a flat position;

[0034] Figure 6 A schematic diagram showing a movable bridge of Example 1 in which the bridge body is in an erected position;

[0035] Figure 7 A schematic front view of the movable bridge of Example 1 is shown;

[0036] Figure 8 The schematic diagram of the structure of the rotating mechanism in Example 1 is shown. DETAILED DESCRIPTION

[0037] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0038] In order to better illustrate the present embodiment, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product;

[0039] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings;

[0040] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "set" and "connection" 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 a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, which can be said to be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply 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 utility model.

[0041] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0042] Embodiment 1:

[0043] The movable bridge of the utility model is used for connecting the main road in the working pit with the entrance of the branch pipe, so as to form a traffic road surface for vehicles and personnel to pass in and out of the branch pipe.

[0044] Please refer to Figure 1 , Figure 2, the main road 100 in the working pit is provided with fork pipe 200 entrances on the left and right sides, and the movable bridge 300 of this embodiment is respectively arranged between the main road 100 and the fork pipe 200 entrances on both sides. The main road 100 includes two main beams 6 and two side beams 5 for supporting its steel platform. The two main beams 6 are parallel to each other. The fork pipe 200 entrances are arranged at an angle relative to the adjacent main beams 6 and are parallel to the side beams 5 on the same side. One end of the side beam 5 is welded to the adjacent main beam 6 and the other end is fixed to the side wall of the pit body (the relevant structure of the main road is detailed in Example 2).

[0045] Please refer to Figure 7 The movable bridge 300 includes a support beam 1, a bridge body 2 and multiple sets of rotating mechanisms 3.

[0046] Please refer to Figure 2 , Figure 3 , Figure 5 , Figure 6 The support beam 1 is parallel to the entrance of the bifurcated pipe 200 on the same side and spaced opposite to each other. The support beam 1 is welded along the side beam 5, and similarly, one end of the support beam 1 is welded to the adjacent main beam 6 and the other end is fixed to the side wall of the well body. A bridge support part 201 is provided at the entrance of the bifurcated pipe 200. In this embodiment, the bifurcated pipe 200 is a steel bifurcated pipe, and the bridge support part 201 is a concrete step provided on the inner side of the bifurcated pipe entrance (inside the bifurcated pipe).

[0047] The beam body of the support beam 1 is also supported and fixed by a plurality of first brackets 41 connected to the bottom of the working well. Specifically, the first bracket 41 includes a first column 411 and a first support plate 412, the first support plate is fixed to the top of the first column, the bottom of the first column is fixed to the bottom of the working well, and the support beam 1 is supported and fixed on the plurality of first support plates 412, and the connection methods include but are not limited to bolt connection, welding, etc. Further, optionally, the first column 411 is made of a round tube, and the first support plate 412 is welded and connected to the upper end of the round tube to support the support beam 1 and increase the contact area; a lower connecting plate is welded to the lower end of the round tube, holes are punched on the lower connecting plate, and expansion bolts are installed to fix the first column 411 on the concrete floor at the bottom of the well, so as to ensure that the support beam is installed firmly and meet the load requirements when using the movable bridge.

[0048] In this embodiment, the bridge body 2 is made of steel. Figure 7 , Figure 8, multiple groups of rotating mechanisms 3 are arranged on the support beam 1 at intervals and connected to one end of the bridge body 2, so that the bridge body 2 can be rotatably connected to the support beam 1 and can be rotated and switched between the flat position and the erected position. Among them, each rotating mechanism 3 includes a gear frame 30, an upper gear shaft 31, a lower gear shaft 32, an upper gear 33, a lower gear 34, an upper connecting arm 35 and a lower connecting arm 36. The gear frame 30 is detachably fixed to the side of the support beam 1 that is parallel to and opposite to the bifurcated pipe entrance. In this embodiment, a rear lining plate 37 is welded on each gear frame 30, and a plurality of rear back plates 38 are welded on the support beam 1 at intervals. The rear lining plate 37 of the gear frame 30 is detachably connected to the corresponding rear back plate 38 through a plurality of fasteners (such as bolts), so that the connection strength can be ensured and the gear frame 30 can be removed from the support beam 1 as a whole when necessary.

[0049] The upper gear shaft 31 and the lower gear shaft 32 are both installed on the gear frame 30 in a direction parallel to the length of the support beam. The upper gear 33 is sleeved outside the upper gear shaft 31 and welded to one end of the upper connecting arm 35. The other end of the upper connecting arm 35 is connected to one end of the bridge body 2. The lower gear 34 is sleeved outside the lower gear shaft 32 and meshes with the upper gear 33. The lower gear 34 is welded to one end of the lower connecting arm 36. The other end of the lower connecting arm 36 is provided with a counterweight 361. The sum of the gravity moments of the counterweights 361 of the multiple sets of rotating mechanisms 3 is balanced with the overall gravity moment of the bridge body 2. When the bridge body 2 rotates to the flat position under the action of an external force, the upper connecting arm 35 and the lower connecting arm 36 are correspondingly rotated to the horizontal and are closed to each other; when the bridge body 2 rotates to the erected position under the action of an external force, the upper connecting arm 35 and the lower connecting arm 36 are correspondingly rotated to the erected and are open to each other.

[0050] Please refer to Figure 5 , Figure 6 When the bridge body 2 is in the flat position, one end of the bridge body 2 is supported by the upper connecting arm 35, and the load is transferred to the gear frame 30 through the upper connecting arm 35 and the upper gear shaft 31, and then the gear frame 30 transfers the load to the support beam 1 and its supporting components, such as the first bracket 41, etc. At least a part of the other end of the bridge body 2 is overlapped and supported on the bridge body support part 201. When the bridge body 2 is in the erected position, the space between the movable bridge 300 and the bifurcated pipe entrance meets the space required for installing the blind head 400 outside the bifurcated pipe entrance. In this way, the blind head 400 can be installed without removing the movable bridge 300.

[0051] Optionally, the movable bridge 300 further includes a pull rod (not shown), one end of which is hinged to the top surface of the bridge body 2. The operator pulls the pull rod to operate the bridge body 2 to rotate around the upper gear shaft 31. After the bridge body 2 rotates, the upper gear 33 is driven to rotate synchronously through the upper connecting arm 35. Since the upper gear 33 and the lower gear 34 are meshed with each other, the lower gear 34 is driven to rotate in the opposite direction, and the lower gear 34 drives the lower connecting arm 36 to rotate synchronously. By setting the counterweight 361, the bridge body 2 will not rotate too fast during the process of pulling up or lowering the bridge body 2, thereby ensuring the safety of the operation.

[0052] Please refer to Figure 7 , a notch 20 is formed at the other end of the bridge body 2, and a first fork portion 21 and a second fork portion 22 are formed on both sides of the notch. After removing the blind head 400, the bridge body 2 is put down and rotated to a flat position. The first fork portion 21 is adapted to extend into the inner side of the entrance of the bifurcated pipe 200 and overlapped and supported on the bridge body support portion 201, and the second fork portion 22 is overlapped and supported on the concrete step at the side wall of the outer well of the bifurcated pipe 200. At this time, the top surface of the bridge body 2 is flush with the top surface of the steel platform of the main road 100, forming a traffic road surface connecting the main road 100 and the bifurcated pipe 200, which is convenient for maintenance vehicles and maintenance personnel to pass in and out of the bifurcated pipe 200, eliminating the process of interrupting the bridge deck and temporarily building after the blind head is removed. After the inspection is completed, the bridge body 2 is folded up, and the blind head 400 can be installed to block the entrance of the bifurcated pipe 200. At this time, the erected bridge body 2 also serves as a safety guardrail, eliminating the safety hazard of personnel and tools falling.

[0053] The movable bridge of the utility model utilizes the weight balance principle. The bridge body can be quickly and smoothly pulled up / lowered with the help of manpower through a pull rod (1 to 2 people can pull up / lower the bridge body within 1 minute). The operation is time-saving and labor-saving, safe and convenient, and the entire operation process is almost vibration-free, impact-free and noise-free.

[0054] Embodiment 2:

[0055] Please refer to Figure 1 , Figure 2 The utility model also proposes a water conveyance tunnel maintenance work pit, in which branch pipe 200 entrances are respectively arranged on the left and right sides of the main road 100 in the work pit, and movable bridges 300 described in any one of the above embodiments are respectively arranged between the main road 100 and the branch pipe 200 entrances on both sides, so it has all the beneficial effects of the movable bridge provided by the above embodiments, and the movable bridge will not be described in detail here.

[0056] Please refer to Figure 2-Figure 5The main road 100 in the working pit includes two main beams 6 and two side beams 5 for supporting its steel platform. The two main beams 6 are parallel to each other. The entrance of the branch pipe 200 is arranged at an angle relative to the adjacent main beams 6 and parallel to the side beams 5 on the same side. One end of the side beam 5 is welded to the adjacent main beam 6 and the other end is fixed to the side wall of the pit body. The beam body of each main beam 6 is supported and fixed by a plurality of second brackets 42 connected to the bottom of the working pit. Specifically, the second bracket 42 includes a second column 421 and a second support plate 422. In this embodiment, the second columns 421 below the two main beams 6 are correspondingly arranged, and a second support plate 422 is provided on the top of the corresponding two second columns 421. The bottom of the second column 421 is fixed to the bottom of the working pit. The main beam 6 is supported and fixed on the plurality of second support plates 422. The connection method includes but is not limited to bolt connection, welding, etc. Further optionally, the second column 421 is made of a round tube, and the second support plate 422 is welded to the upper ends of the corresponding two round tubes to support the main beam 6; the lower connecting plate is welded to the lower end of the round tube, and holes are punched on the lower connecting plate to install expansion bolts so that the second column 421 is fixed to the concrete floor at the bottom of the well. In this embodiment, the two main beams 6 are also connected to each other by connecting ribs. For other matters not described, please refer to the prior art.

[0057] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and concept of the present invention, which should be included in the protection scope of the present invention.

Claims

1. A movable bridge, used to connect the main road in the working pit with the entrance of the branch pipe, forming a traffic road for vehicles and personnel to pass in and out of the branch pipe, characterized in that: include: Bridge; The support beam is parallel to the branch pipe entrance and spaced opposite to each other, and is welded along the side beam on the corresponding side of the main road, and the two ends are respectively fixed to the main beam on the corresponding side of the main road and the side wall of the well body; Multiple sets of rotating mechanisms are arranged on the support beam at intervals and connected to one end of the bridge body, so as to realize that the bridge body can be rotatably connected to the support beam and can be rotated and switched between a flat position and an erected position; wherein, When the bridge body is rotated to the flat position, at least a portion of the other end of the bridge body is overlapped and supported on the bridge body support portion on the inner side of the fork pipe entrance; When the bridge body is rotated to the erected position, the space between the movable bridge and the bifurcated pipe inlet satisfies the space required for installing a blind head on the outside of the bifurcated pipe inlet.

2. The movable bridge according to claim 1, characterized in that: The branch pipe inlets are arranged at an angle relative to the adjacent main beams and are parallel to the corresponding side beams. One end of the side beam is welded to the main beam and the other end is fixed to the side wall of the well body.

3. The movable bridge according to claim 1, characterized in that: The beam body of the support beam is also supported and fixed by a plurality of first brackets connected to the bottom of the working well.

4. The movable bridge according to claim 3, characterized in that: Each of the first brackets includes a first column and a first support plate, wherein the first support plate is fixed to the top of the first column, and the bottom of the first column is fixed to the bottom of the working well; The support beam is supported and fixed on the plurality of first support plates.

5. The movable bridge according to claim 1, characterized in that: Each set of the rotating mechanism comprises a gear rack, which is detachably fixed to a side of the support beam parallel to and opposite to the bifurcated pipe inlet, and an upper gear and a lower gear are mounted on the gear rack, the upper gear and the lower gear are meshed with each other, and the gear shafts are parallel to the length direction of the support beam; The upper gear is fixedly connected to one end of the upper connecting arm, the other end of the upper connecting arm is connected to one end of the bridge body, the lower gear is fixedly connected to one end of the lower connecting arm, and the other end of the lower connecting arm is connected to the counterweight; When the bridge body is rotated to a flat position under the action of an external force, the upper connecting arm and the lower connecting arm are correspondingly rotated to a horizontal position and are closed to each other; When the bridge body is rotated to an erected position under the action of an external force, the upper connecting arm and the lower connecting arm are correspondingly rotated to be erected and spread apart from each other.

6. The movable bridge according to claim 5, characterized in that: The gear frame is welded with a rear lining plate, and the support beam is welded with a back plate at intervals. The rear lining plate of each gear frame is detachably connected to the corresponding back plate through a plurality of fasteners.

7. The movable bridge according to claim 1, characterized in that: It also includes a pull rod, one end of which is hinged to the top surface of the bridge body.

8. The movable bridge according to claim 1, characterized in that: The bridge body support portion is a concrete step arranged on the inner side of the bifurcated pipe entrance.

9. The movable bridge according to claim 1, characterized in that: The other end of the bridge body is provided with a notch, and two sides of the notch respectively form a first bifurcation portion and a second bifurcation portion; When the bridge body is in a flat position, the first fork portion is overlapped and supported on the bridge body support portion on the inner side of the fork pipe entrance, and the second fork portion is overlapped and supported on the side wall of the well body outside the fork pipe.

10. A water conveyance tunnel maintenance work pit, wherein a branch pipe entrance is provided on the left and right sides of the main road in the work pit, characterized in that: A movable bridge as described in any one of claims 1 to 9 is provided between each branch pipe entrance and the main road.

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