Midspan slewing crane for hydropower station

Abstract

The utility model discloses a hydropower station midspan slewing crane, which comprises a slewing crane consisting of a slewing platform, a cantilever crane, a pull rod, a hoisting mechanism, an overhanging beam, a supporting rod and a supporting cross beam, the upper part of the slewing crane is hinged with an upper structure of a portal frame through the pull rod, and the overhanging beam in the middle of the slewing crane is fixed with the supporting cross beam of the portal frame; the lower portion of the slewing crane is hinged to walking beams on the two sides of the bottom of the portal through supporting rods. Compared with the prior art, the midspan slewing crane disclosed by the utility model has the advantages that the operation range of the slewing crane is enlarged, the requirement of simultaneous hoisting in the midspan and outside the span is met, and the utilization rate and the hoisting efficiency of the slewing crane are improved; the gate and the trash rack which are annularly arranged in the water flow direction can be lifted, and the groove entering precision of the trash rack and the gate is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoisting machinery, and particularly relates to a mid-span slewing crane for a hydropower station. Background Art

[0002] In the hoisting equipment of hydropower stations, the slewing crane is sometimes one of the main equipment of the mobile hoist. The common slewing crane is fixed at the walking beam at the bottom of one side of the gantry through a support column, and is used for lifting trash racks, gate maintenance, hydraulic cylinder maintenance, and hoisting of temporary equipment, etc. Therefore, the existing slewing crane can only perform hoisting operations within the slewing radius on one side of the gantry crane, and the in-span operation range is small, and it is impossible to hoist the equipment or components on the other side of the gantry crane. In addition, as Figure 4 shown, the trash rack slots and gate slots are arranged annularly along the walking direction of the gantry crane, and the common slewing crane also cannot meet the working requirements. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a mid-span slewing crane for a hydropower station in view of the deficiencies of the prior art. The device is arranged on the center line within the span of the gantry crane, which expands the mid-span operation range and can even reach near both sides of the gantry crane. It ensures the slotting accuracy of the annularly arranged trash racks and gates, and improves the hoisting efficiency.

[0004] The technical solution adopted by the utility model is a mid-span slewing crane for a hydropower station, which includes a centering support, a slewing unit and a hoisting unit. The centering support includes an outrigger beam, a first hanger plate, a second hanger plate and a support rod. There are two second hanger plates, which are respectively fixedly installed on the walking beams on both sides of the bottom of the gantry. The outrigger beam is located in the middle of the gantry and is fixedly connected to the gantry through a support cross beam. The first hanger plate is fixed to the bottom of the outrigger beam. There are two support rods, the top ends of which are respectively hinged to both sides of the first hanger plate, and the bottom ends of which are respectively hinged to the two second hanger plates. The hoisting unit is installed on the slewing unit for hoisting objects, and the slewing unit is installed on the outrigger beam and can drive the hoisting unit to rotate.

[0005] Further, the slewing unit includes a slewing mechanism and a slewing platform. The slewing mechanism is fixedly installed on the outrigger beam, and the slewing platform is installed at the slewing end of the slewing mechanism.

[0006] Further, the hoisting unit includes a hoisting mechanism, a boom, a fixed pulley block and a movable pulley block. The hoisting unit is fixedly installed on the slewing platform. The bottom end of the boom is rotatably installed on the slewing platform. The fixed pulley block is installed at the top end of the boom. A steel wire rope is wound around the drum of the hoisting mechanism, and the steel wire rope passes around the fixed pulley block and then winds around the movable pulley block.

[0007] Further, a balance pulley block is installed on the hanger plate at the top end of the boom, and the steel wire rope passes around the movable pulley block and then winds around the balance pulley block.

[0008] Further, a pull rod is hinged to the top end of the boom, and the pull rod is hinged to the top of the gantry.

[0009] The beneficial effects of the present utility model are as follows:

[0010] (1) For the mid-span slewing crane of the present utility model, compared with the existing technology, the operation range of the slewing crane is increased, meeting the requirements of simultaneous hoisting in the mid-span and outside the span, and improving the utilization rate and hoisting efficiency of the slewing crane.

[0011] (2) The mid-span slewing crane of the present utility model can hoist the gates and trash racks arranged annularly along the water flow direction, ensuring the slotting accuracy of the trash racks and gates. Description of the Drawings

[0012] Figure 1 is the front view schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 is the side view schematic diagram of the overall structure of the present utility model;

[0014] Figure 3 is the axonometric schematic diagram of the overall structure of the present utility model;

[0015] Figure 4 is the trash rack arranged annularly;

[0016] Markings in the figure: 1, movable pulley block; 2, slewing platform; 3, boom; 4, pull rod; 5, hoisting mechanism; 6, steel wire rope; 7, cantilever beam; 8, slewing mechanism; 9, fixed pulley block; 10, balance pulley block; 11, driver's cab; 12, support rod; 13, support cross beam; 14, lifting plate I; 15, lifting plate II; 16, walking beam. Detailed Embodiments

[0017] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the technical solutions of the present utility model will be further described in detail below with reference to the drawings in the embodiments of the present utility model.

[0018] Refer to Figures 1 to 3, a mid-span slewing crane for a hydropower station according to the present utility model includes a centering support, a slewing unit and a lifting unit. The centering support includes an outrigger beam 7, a first lifting plate 14, a second lifting plate 15 and a support rod 12. There are two second lifting plates 15 which are respectively fixedly installed on the walking beams 16 on both sides of the bottom of the gantry. The outrigger beam 7 is located in the middle of the gantry and is fixedly connected to the gantry through a support cross beam 13. The first lifting plate 14 is fixed to the bottom of the outrigger beam 7. There are two support rods 12, and the top ends thereof are respectively hinged to both sides of the first lifting plate 14, and the bottom ends thereof are respectively hinged to the two second lifting plates 15. The slewing unit includes a slewing mechanism 8 and a slewing platform 2. The slewing mechanism 8 is fixedly installed on the outrigger beam 7, and the slewing platform 2 is installed at the slewing end of the slewing mechanism 8. The lifting unit includes a hoisting mechanism 5, a boom 3, a fixed pulley block 9 and a movable pulley block 1. The lifting unit is fixedly installed on the slewing platform 2. The bottom end of the boom 3 is rotatably installed on the slewing platform 2. The fixed pulley block 9 is installed at the top end of the boom 3. A steel wire rope 6 is wound around the drum of the hoisting mechanism 5. The steel wire rope 6 bypasses the fixed pulley block 9 and then is wound around the movable pulley block 1. A balance pulley block 10 is installed on the lifting plate at the top end of the boom 3. The steel wire rope 6 bypasses the movable pulley block 1 and then is wound around the balance pulley block 10. A pull rod 4 is hinged to the top end of the boom 3, and the pull rod 4 is hinged to the top of the gantry.

[0019] The two support rods 12 are symmetrically arranged, and the outrigger beam 7 is located in the middle of the gantry, which expands the mid-span operation range, so that the operation surface can extend to the vicinity of both sides of the gantry, thus meeting the operation requirements.

[0020] The slewing mechanism 8 drives the slewing platform 2 to rotate, which can drive the hoisting mechanism 5 and the boom 3 to rotate synchronously. When the hoisting mechanism 5 drives the steel wire rope 6 to retract and extend, it can drive the object on the movable pulley block 1 to lift and lower.

[0021] The working principle of the present utility model is as follows:

[0022] The gantry crane installed on the dam surface of the hydropower station travels along the track in the water flow direction, the axis of the trash rack and the gate slot. By installing the mid-span slewing crane of the present utility model on the gantry, the gantry crane drives the slewing crane to move along the track to realize the movement of the movable pulley block 1, the trash rack or the gate along the track direction; the slewing crane makes a slewing motion to realize the slewing motion of the movable pulley block 1, the trash rack or the gate around the slewing center in the mid-span, so as to realize the hoisting and positioning of the trash rack and the gate; the slewing crane makes a hoisting motion to accurately hoist or insert the trash rack and the gate into the slot.

[0023] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. It should also be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A mid-span slewing crane for a hydropower station, characterized in that, It includes a centering support, a slewing unit and a lifting unit. The centering support includes an outrigger beam, a first suspension plate, a second suspension plate and a support rod. There are two second suspension plates which are respectively fixedly installed on the walking beams on both sides of the bottom of the gantry. The outrigger beam is located in the middle of the gantry and is fixedly connected to the gantry through a support cross beam. The first suspension plate is fixed to the bottom of the outrigger beam. There are two support rods, the tops of which are respectively hinged to both sides of the first suspension plate, and the bottoms of which are respectively hinged to the two second suspension plates. The lifting unit is installed on the slewing unit for lifting objects. The slewing unit is installed on the outrigger beam and can drive the lifting unit to rotate.

2. The mid-span slewing crane for a hydropower station according to claim 1, characterized in that, The slewing unit includes a slewing mechanism and a slewing platform. The slewing mechanism is fixedly installed on the outrigger beam, and the slewing platform is installed at the slewing end of the slewing mechanism.

3. The mid-span slewing crane for a hydropower station according to claim 2, characterized in that, The lifting unit includes a hoisting mechanism, a boom, a fixed pulley block and a movable pulley block. The lifting unit is fixedly installed on the slewing platform. The bottom end of the boom is rotatably installed on the slewing platform. The fixed pulley block is installed at the top end of the boom. A steel wire rope is wound around the drum of the hoisting mechanism. The steel wire rope passes around the fixed pulley block and then is wound around the movable pulley block.

4. The mid-span slewing crane for a hydropower station according to claim 3, characterized in that, A balance pulley block is installed on the suspension plate at the top end of the boom. The steel wire rope passes around the movable pulley block and then is wound around the balance pulley block.

5. The mid-span slewing crane for a hydropower station according to claim 3, characterized in that, A pull rod is hinged to the top end of the boom, and the pull rod is hinged to the top of the gantry.

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