Overturn-preventing hoist
By using parallel gantry and rotary lifting mechanisms in the opening and closing machine to adjust the anti-capsulant fulcrum position, the problem of the opening and closing machine capsized under large loads is solved, and the stability and cost-effective balance is achieved.
Patent Information
- Application Number
- CN202422605961.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-28
AI Technical Summary
In the prior art, the hydropower station starter is prone to overturn under large load conditions, and adding counterweight to offset the overturning torque will lead to problems such as increasing self-weight, increasing cost and insufficient space.
The gantry and slewing lifting mechanism arranged in parallel are adopted, including a support structure, a slewing structure and a suspension structure, and the anti-pollution fulcrum position is adjusted so that the overturning moment of the slewing lifting mechanism is reduced when lifting the load, and the anti-pollution moment of the gantry's own weight increases.
The overall anti-overturn stability of the starter is improved, and the problems of increased self-weight and cost are avoided, and the stability under large load conditions is ensured.
Smart Images
Figure CN223269175U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water conservancy and hydropower hoists, in particular to an anti-overturning hoist. Background Art
[0002] At least one mobile gate crane (hereinafter referred to as a gantry crane) is installed atop the dam of a hydropower station. It is used to open and close the inlet service gate, emergency gate, inspection gate, main and auxiliary trash racks, and other equipment. In some cases, it can also lift the emergency gates of the spillway and sand flushing gates. A considerable number of gantry cranes are equipped with fixed-luffing slewing cranes, mainly used to lift inlet trash racks, trash cleaning machines, cleaning grabs, and the hydraulic hoists of the spillway radial gates for maintenance. This is because the inlet trash racks are generally located on the waterside of the dam, while the hydraulic hoists of the spillway radial gates are generally located on the backside of the dam.
[0003] When the gantry crane's lifting load is small and its slewing radius is small, the gantry crane's running beam adopts a straight design, with the slewing crane's fixing column fixed to the upper flange of the running beam. Because the overturning moment generated by the slewing crane's own weight and the weight of the load is far smaller than the anti-overturning moment generated by the gantry crane's own weight, the presence of the slewing crane has no impact on the gantry crane's stability. This arrangement is simple in structure and has clear force distribution. However, when the lifting load and slewing radius of the gantry crane increase, the overturning moment generated by the slewing crane during operation becomes larger than the gantry crane's own weight, easily causing the gantry crane to become unstable and overturn. With this arrangement, the gantry crane's anti-overturning capacity, a safety indicator, is unlikely to meet regulatory requirements.
[0004] In the related art, the method generally adopted is to add counterweights to the gantry to offset the overturning moment generated by the slewing crane. However, on the one hand, adding counterweights will increase the deadweight of the gantry crane and increase the manufacturing cost. On the other hand, if a large number of counterweights need to be added, there may be problems such as insufficient counterweight space, insufficient power for the trolley traveling mechanism, difficulty in fixing the stacked counterweights, and affecting the appearance. Utility Model Content
[0005] The utility model aims to provide an anti-overturning door opener, aiming to ensure that the door machine is stable and does not overturn under special heavy load conditions.
[0006] In order to achieve the above-mentioned purpose, the utility model provides an anti-overturning door opening and closing machine, including a gantry and a rotary hanging mechanism arranged in parallel, the rotary hanging mechanism including a support structure, a rotary structure and a suspension structure from bottom to top, the support structure is rotatably connected to the lower section of the gantry, the rotary structure is relatively fixedly connected to the middle section of the gantry, the suspension structure and the rotary structure are inclined, and the suspension structure is inclined toward the side of the support structure facing away from the gantry, and the suspension structure is movably connected to the upper section of the gantry.
[0007] Optionally, the supporting structure includes a column beam, a support block and a supporting wheel group. The column beam is rotatably connected to the lower section of the portal frame. The rotating structure and the support block are respectively located on the upper and lower surfaces of the column beam. The supporting wheel group is located at the end of the support block away from the column beam to contact the ground.
[0008] Optionally, the rotary structure is provided with a fixed column and a rotary bin located on the top of the fixed column, the other end of the fixed column is planted on the upper surface of the column beam, and the support block and the supporting wheel assembly are located directly below the fixed column.
[0009] Optionally, the support structure further includes an adjustment pad, which is arranged between the support block and the column beam.
[0010] Optionally, the anti-overturning door opening machine also includes a hinge shaft, the column beam is provided with a hinge part, the side of the door frame is provided with a connecting part, the hinge part is provided with a hinge hole, the connecting part is provided with a through hole, and the hinge shaft passes through the hinge hole and the through hole in sequence to connect the lower section of the door frame and the column beam.
[0011] Optionally, a plurality of movable wheel groups are provided at the bottom of the gantry, and the movable wheel group located on one side of the rotary hanging mechanism is arranged adjacent to the supporting wheel group.
[0012] The anti-overturning gate hoist of the present invention includes a gantry and a rotary hanging mechanism arranged in parallel. The rotary hanging mechanism includes a support structure, a rotary structure, and a suspension structure from bottom to top. The suspension structure is movably connected to the upper section of the gantry, the rotary structure is relatively fixedly connected to the middle section of the gantry, the support structure is rotatably connected to the lower section of the gantry, the suspension structure and the rotary structure are inclined, and the suspension structure is inclined toward the side of the support structure that is away from the gantry. The arrangement of the support structure adjusts the position of the anti-overturning force point of the gate hoist from the anti-overturning fulcrum originally located on the gantry to the anti-overturning fulcrum currently located on the rotary hanging mechanism, so that the overturning moment generated by the rotary hanging mechanism when lifting a load is reduced relative to the original overturning moment, while the anti-overturning moment generated by the deadweight of the gantry is increased, which is beneficial to improving the overall anti-overturning stability of the gate hoist. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the side structure of the entire anti-overturning hoist of the utility model.
[0014] Figure 2 For example Figure 1 Schematic diagram of the locally enlarged structure of the M2 part.
[0015] In the figure: 100, anti-overturning door hoist; 10, door frame; 11, walking beam; 12, frame body; 13, moving wheel set; 20, articulated shaft; 30, rotary ceiling mechanism; 31, supporting structure; 311, column beam; 312, supporting block; 313, supporting wheel set; 314, adjusting pad; 32, fixed column; 33, rotary bin. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical solution and advantages of the present invention clearer and more understandable, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.
[0017] At least one mobile gate crane (hereinafter referred to as a gantry crane) is installed atop the dam of a hydropower station. It is used to open and close the inlet service gate, emergency gate, inspection gate, main and auxiliary trash racks, and other equipment. In some cases, it can also lift the emergency gates of the spillway and sand flushing gates. A considerable number of gantry cranes are equipped with fixed-luffing slewing cranes, mainly used to lift inlet trash racks, trash cleaning machines, cleaning grabs, and the hydraulic hoists of the spillway radial gates for maintenance. This is because the inlet trash racks are generally located on the waterside of the dam, while the hydraulic hoists of the spillway radial gates are generally located on the backside of the dam.
[0018] When the gantry crane's lifting load is small and its slewing radius is small, the gantry crane's running beam adopts a straight design, with the slewing column fixed to the upper flange of the running beam. Because the overturning moment generated by the slewing crane's own weight and the weight of the load is far smaller than the anti-overturning moment generated by the gantry crane's own weight, the presence of the slewing crane has no impact on the gantry crane's stability. This arrangement is simple in structure and has clear force distribution. However, when the lifting load and slewing radius of the gantry crane increase, the overturning moment generated by the slewing crane during operation becomes larger than the gantry crane's own weight, easily causing the gantry crane to become unstable and overturn. With this arrangement, the gantry crane's anti-overturning capacity, a safety indicator, is unlikely to meet regulatory requirements.
[0019] In the related art, the method generally adopted is to add counterweights to the gantry to offset the overturning moment generated by the slewing crane. However, on the one hand, adding counterweights will increase the deadweight of the gantry crane and increase the manufacturing cost. On the other hand, if a large number of counterweights need to be added, there may be problems such as insufficient counterweight space, insufficient power for the trolley traveling mechanism, difficulty in fixing the stacked counterweights, and affecting the appearance.
[0020] The utility model provides an anti-overturning hoist 100, which is a mobile hoist applicable to the technical field of water conservancy and hydropower hoists.
[0021] like Figure 1 and Figure 2As shown, in order to achieve the above-mentioned purpose, the utility model provides an anti-overturning door opening and closing machine 100, the anti-overturning door opening and closing machine 100 includes a gantry 10 and a rotary hanging mechanism arranged in parallel, the rotary hanging mechanism includes a supporting structure 31, a rotary structure and a suspension structure from bottom to top, the supporting structure 31 is rotatably connected to the lower section of the gantry 10, the rotary structure is relatively fixedly connected to the middle section of the gantry 10, the suspension structure and the rotary structure are inclined and the suspension structure is inclined toward the side of the support structure 31 facing away from the gantry 10, and the suspension structure is movably connected to the upper section of the gantry 10.
[0022] The anti-overturning gate hoist 100 of the present invention includes a gantry 10 and a rotary hanging mechanism arranged in parallel. The rotary hanging mechanism includes a support structure 31, a rotary structure and a suspension structure from bottom to top. The suspension structure is movably connected to the upper section of the gantry 10, the rotary structure is relatively fixedly connected to the middle section of the gantry 10, the support structure 31 is rotatably connected to the lower section of the gantry 10, the suspension structure and the rotary structure are arranged obliquely, and the suspension structure is inclined toward the side of the support structure 31 that is away from the gantry 10. The arrangement of the support structure 31 adjusts the position of the anti-overturning force point of the gate hoist from the anti-overturning fulcrum originally located on the gantry 10 to the anti-overturning fulcrum currently located on the rotary hanging mechanism, so that the overturning moment generated when the rotary hanging mechanism lifts the load is reduced relative to the original overturning moment, while the anti-overturning moment generated by the deadweight of the gantry 10 is increased, which is beneficial to improving the overall anti-overturning stability of the gate hoist.
[0023] Optionally, a plurality of movable wheel groups 13 are provided at the bottom of the gantry 10 , and the movable wheel group 13 located on one side of the rotary hanging mechanism is arranged adjacent to the supporting wheel group 313 .
[0024] In this embodiment, the gantry 10 includes a walking beam 11 and a frame body 12 located at the upper end of the walking beam 11 and a plurality of moving wheel groups 13 located at the upper end of the walking beam 11. The plurality of moving wheel groups 13 are used to support the walking beam 11 and the frame body 12 and drive the entire machine to move. Figure 1 As shown in M1, the walking beam 11 of the gantry 10 adopts a straight design, and the slewing part is fixed on the upper flange of the walking beam 11. The force point generated by the deadweight of the slewing crane and the weight of the hanging object falls on the moving wheel group 137-1. Figure 1 The M2 shown is an improvement on the structure of the gantry 10 in the anti-overturning door opening machine 100 proposed in the present invention. The support structure 31 dedicated to the rotary hoisting mechanism is used for support and fixation, and the force points generated by the deadweight of the rotary crane and the weight of the hoisted object are updated to the support block 312 above the supporting wheel group 3137-2 described below.
[0025] Combined with reference Figure 2As shown, when the M1 structure is used, when the lifting load of the anti-overturning hoist 100 is small and the turning radius is small, the overturning moment (force point 7-1) generated by the slewing crane's own weight and the weight of the suspended object is much smaller than the anti-overturning moment generated by the gantry's own weight, and the presence of the slewing crane will not have any impact on the stability of the entire machine. However, when the lifting load of the slewing crane increases and the turning radius increases, the overturning moment (force point 7-1) generated by the slewing crane's own weight and the weight of the suspended object is relatively large relative to the deadweight of the gantry 10, which can easily cause the hoist 100 to become unstable and overturn.
[0026] Combined with reference Figure 2 As shown, when the M2 structure is adopted, the calculation position of the overturning moment generated by the slewing crane is transferred from 7-1 to 7-2, and the overturning moment generated by the deadweight of the slewing crane and the weight of the suspended object is reduced relative to the original overturning moment, thereby increasing the anti-overturning moment generated by the deadweight of the gantry 10 and improving the overall anti-overturning stability of the gate hoist.
[0027] It should be noted that the slewing crane in the above embodiment is a coordinated structure of the fixed column 32 and the slewing bin 33 for lifting heavy objects.
[0028] Optionally, the support structure 31 includes a column beam 311, a support block 312 and a supporting wheel group 313. The column beam 311 is rotatably connected to the lower section of the gantry 10. The rotating structure and the support block 312 are respectively located on the upper and lower surfaces of the column beam 311. The supporting wheel group 313 is located at the end of the support block 312 away from the column beam 311 to contact the ground.
[0029] In this embodiment, the original straight walking beam of the portal frame 10 is split into the walking beam 11 and the column beam 311 of the slewing and hanging mechanism. The slewing and hanging mechanism uses its own support structure 31 to support the slewing and hanging structures, so that the force point when lifting heavy objects falls on the support block 312 of the support structure 31. Furthermore, the supporting wheel assembly 313 is mounted on the lower flange of the column beam 311 via bolts. Reinforcing ribs are provided between the screw holes of the bolt connection to enhance the strength and reliability of the connection.
[0030] Optionally, the rotating structure is provided with a fixed column 32 and a rotating bin 33 located on the top of the fixed column 32 , the other end of the fixed column 32 is planted on the upper surface of the column beam 311 , and the support block 312 and the supporting wheel group 313 are located directly below the fixed column 32 .
[0031] In this embodiment, the fixed column 32 is planted on the surface of the column beam 311 facing away from the support block 312, that is, the fixed column 32 is planted on the upper surface of the column beam 311, and the connection between the fixed column 32 and the rotary bin 33 is fixed to the portal frame 10, thereby improving the stability of the connection between the fixed column 32 and the rotary bin 33. The support block 312 is arranged directly below the fixed column 32 to ensure that the deadweight load of the rotary crane is vertically transmitted to the support wheel assembly 313 through the column beam 311. When lifting a heavy object, the vertical component of force is perpendicular and directly directed to the support block 312 and the support wheel assembly 313, reducing the oblique force on the support block 312 and the support wheel assembly 313 and ensuring the stability of the anti-overturning force point.
[0032] Furthermore, the wheel bearing seat used in the above-mentioned supporting wheel group 313 is consistent with the moving wheel group 13 on the portal frame 10, and both adopt a cup-type structure or a 45° split structure. The support block 312 of the supporting wheel group 313 is consistent with the supporting structure on the moving wheel group 13 on the portal frame 10, and both adopt a split-type sleeve hinge support connection to reduce manufacturing costs; the above detailed requirements for the supporting wheel group 313 are known to those skilled in the art and will not be repeated here.
[0033] Combined with reference Figure 2 As shown, the support structure 31 optionally further includes an adjustment pad 314, which is disposed between the support block 312 and the column beam 311. The adjustment pad 314 can be a steel plate having a certain thickness after machining, or a composite steel plate formed by stacking several thin steel plates, to ensure the horizontal arrangement of the column beam 311 of the rotary hanging mechanism and to ensure the vertical position of the supporting wheel assembly 313 during on-site installation. The material of the adjustment pad 314 is not particularly limited.
[0034] Combined with reference Figure 2 As shown, optionally, the anti-overturning door opening machine 100 also includes an articulated shaft 20, the column beam 311 is provided with a hinged portion, the side of the gantry 10 is provided with a connecting portion, the articulated portion is provided with a hinged hole, the connecting portion is provided with a through hole, and the articulated shaft 20 passes through the articulated hole and the through hole in sequence to connect the lower section of the gantry 10 and the column beam 311.
[0035] In this embodiment, the hinge portion of the column beam 311 is formed by protruding on the side of the column beam 311 facing the gantry 10. The connection portion of the gantry 10 is formed by protruding on the side of the walking beam 11 of the gantry 10 facing the column beam 311. The hinge shaft 20 can be an ordinary metal shaft that passes through multiple hinge holes and through holes at the same time. The hinged connection allows a certain relative motion margin between the walking beam 11 and the column beam 311 under force, thereby improving the force stability of the walking beam 11 and the column beam 311.
[0036] It should be noted that in order to ensure uniformity of horizontal force on the supporting wheel set 313 and improve the support stability of the revolving bin 33 and the fixed column 32, the number of wheels of the supporting wheel set 313 is greater than or equal to two.
[0037] In the present invention, if the terms "inside", "outside", "upper", "lower" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the utility model is usually placed when in use, it is only for the convenience of describing the present application 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 application.
[0038] In this utility model, unless otherwise specified or limited, the terms "dispose," "install," "fix," and "connect" should be understood in a broad sense. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also mean internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0039] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present invention.
Claims
1. An anti-overturning hoist, characterized in that: It includes a portal frame and a rotary hanging mechanism arranged in parallel, the rotary hanging mechanism includes a supporting structure, a rotary structure and a suspension structure from bottom to top, the supporting structure is rotatably connected to the lower section of the portal frame, the rotary structure is relatively fixedly connected to the middle section of the portal frame, the suspension structure and the rotary structure are inclined, and the suspension structure is inclined toward the side of the supporting structure facing away from the portal frame, and the suspension structure is movably connected to the upper section of the portal frame.
2. The anti-overturning hoist according to claim 1, characterized in that: The supporting structure includes a column beam, a supporting block and a supporting wheel group. The column beam is rotatably connected to the lower section of the portal frame. The rotating structure and the supporting block are respectively located on the upper and lower surfaces of the column beam. The supporting wheel group is located at the end of the support block away from the column beam to contact the ground.
3. The anti-overturning hoist according to claim 2, characterized in that: The rotary structure is provided with a fixed column and a rotary bin located on the top of the fixed column. The other end of the fixed column is planted on the upper surface of the column beam. The support block and the supporting wheel group are located directly below the fixed column.
4. The anti-overturning hoist according to claim 2, characterized in that: The support structure further includes an adjustment pad, which is arranged between the support block and the column beam.
5. The anti-overturning hoist according to claim 2, characterized in that: The anti-overturning door opening machine also includes a hinge shaft, the column beam is provided with a hinge part, the side of the door frame is provided with a connecting part, the hinge part is provided with a hinge hole, and the connecting part is provided with a through hole. The hinge shaft passes through the hinge hole and the through hole in sequence to connect the lower section of the door frame and the column beam.
6. The anti-overturning hoist according to claim 2, characterized in that: A plurality of movable wheel groups are provided at the bottom of the door frame, and the movable wheel group located on one side of the rotary hanging mechanism is arranged adjacent to the supporting wheel group.