Amplitude-variable slewing crane for hydropower station

Abstract

The amplitude-variable slewing crane comprises a slewing platform, a slewing bearing and a slewing speed reducer are arranged below the slewing platform, and a hoisting mechanism is arranged above the slewing platform; one end of the cantilever crane is hinged with the revolving platform, and the other end of the cantilever crane is connected with one end of the hydraulic oil cylinder through a pin shaft and is also connected with a pulley device through a pin shaft; the other end of the hydraulic oil cylinder is hinged to a switching rod piece through a variable-amplitude hinged shaft, and the other end of the switching rod piece is fixedly connected with a rotating shaft device. According to the slewing crane disclosed by the utility model, the luffing mechanism is driven by stretching and retracting of the hydraulic oil cylinder, so that the slewing crane has larger slewing radius and larger hoisting load.

Description

Technical Field

[0001] This utility model belongs to the field of lifting machinery technology, specifically relating to a variable luffing slewing crane for hydropower stations. Background Technology

[0002] Slewing cranes are one of the commonly used mobile hoisting and shoveling devices in hydropower stations, used for lifting trash racks, gates, and for repairing hydraulic cylinders and lifting temporary equipment. The slewing radius of slewing cranes in hydropower stations is usually fixed, thus limiting the lifting range and making them inflexible. A small number of projects have used wire rope driven variable luffing slewing cranes, which can achieve variable luffing, but have the following drawbacks: (1) The luffing system and the hoisting system are not independent and interfere with each other; (2) The wire rope is prone to wear and deformation, and once it breaks or gets stuck, it may cause serious safety accidents; (3) The wire rope is a flexible structure, which can easily cause the hoisted object to swing significantly during operation, creating safety hazards. In addition, commonly used variable-amplitude lifting equipment, such as truck cranes, usually have a tie rod that is hinged at one end to the middle of the boom and the other end needs to be fixed to the slewing mechanism together with the end of the boom due to its own structural characteristics. The boom is subjected to lateral forces and generates a large bending moment. The tie rod can only provide a small resistance arm, which limits the lifting height and lifting radius and usually cannot meet the actual needs of hydropower stations. Utility Model Content

[0003] The purpose of this utility model is to provide a variable luffing slewing crane for hydropower stations, which drives the luffing mechanism through the extension and retraction of hydraulic cylinders, and has a larger slewing radius and a larger lifting load.

[0004] The technical solution adopted in this utility model is:

[0005] The variable-amplitude slewing crane for hydropower stations includes a slewing platform, a slewing bearing and a slewing reducer installed below the slewing platform, and a hoisting mechanism installed above the slewing platform. One end of the boom is hinged to the slewing platform, and the other end is connected to one end of a hydraulic cylinder via a pin. This end is also connected to a pulley device via a pin. The other end of the hydraulic cylinder is hinged to a conversion rod via a variable-amplitude hinge shaft, and the other end of the conversion rod is fixedly connected to a slewing shaft device.

[0006] The features of this utility model also include:

[0007] The conversion member includes a connecting rod, with connecting plates fixed to both ends of the connecting rod, and the two connecting plates are set perpendicular to each other.

[0008] The connecting plate has shaft holes, two of which are used to connect to the rotary shaft device and the hydraulic cylinder, respectively.

[0009] The luffing hinge shaft is inserted into one of the shaft holes of the conversion rod, connecting the conversion rod to the hydraulic cylinder.

[0010] The rotary shaft assembly includes a support, which is a horizontally placed U-shaped structure. A support column is provided on the inner bottom of the support, and a flange is connected above the support column. The rotary pin passes through the top of the support and one of the shaft holes of the conversion rod in sequence, and then connects to the support column through the flange.

[0011] A bearing is installed between the slewing pin and the flange.

[0012] The hydraulic cylinder is connected to the overall control system of the smart power station, and the control system controls the movement of the hydraulic cylinder.

[0013] The slewing shaft assembly is fixed to the upper structure of the gantry.

[0014] The beneficial effects of this utility model are:

[0015] (1) The luffing mechanism of the slewing crane of this utility model is driven by a hydraulic cylinder, and the hoisting mechanism is driven by an electric motor. The luffing mechanism and the hoisting mechanism have their own independent drive systems, and the operation process does not interfere with each other.

[0016] (2) The slewing crane of this utility model uses a hydraulic cylinder instead of the tie rod device in the common slewing crane structure. The luffing mechanism is driven by the extension and retraction of the hydraulic cylinder, which overcomes the wear caused to the wire rope by the wire rope drive method and is safer. The movement trajectory of the pulley device and the suspended load can be calculated by the extension and retraction of the hydraulic cylinder. In addition, the hydraulic control system can be connected to the overall control system of the smart power station, so that the luffing operation process is stable and safe.

[0017] (3) The boom of this utility model is hinged at both ends, and there is no lateral load within the boom length range, so no bending moment is generated, and a larger turning radius can be achieved.

[0018] (4) One end of the hydraulic cylinder of the rotary crane of this utility model is hinged to the boom, and the other end is arranged above the upper structure plane of the gantry. The force generated by the extension and retraction of the cylinder can be applied to, for example, Figure 1 The large resisting moment generated at point O in the diagram is beneficial for achieving larger loads, larger slewing radius, and larger lifting loads, thus expanding the operating range of the rotary crane.

[0019] (5) One end of the hydraulic cylinder of the slewing crane of this utility model is hinged to the boom, and the other end is connected to the slewing shaft device through the conversion rod, so that it can rotate freely around the slewing center line in sync with the slewing mechanism. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the rotary crane of this utility model;

[0021] Figure 2 This is a schematic diagram of the conversion rod in the rotary crane of this utility model;

[0022] Figure 3 This is a schematic diagram of the slewing shaft device in the slewing crane of this utility model.

[0023] In the diagram, 1. Pulley assembly, 2. Hydraulic cylinder, 3. Boom, 4. Slewing bearing, 5. Slewing platform, 6. Lifting mechanism, 7. Slewing shaft assembly, 71. Support, 72. Support column, 73. Flange, 74. Slewing pin, 75. Bearing, 8. Conversion rod, 81. Connecting rod, 82. Connecting plate, 83. Shaft hole, 9. Luffing hinge. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] This utility model relates to a variable-amplitude slewing crane for hydropower stations, with the following structure: Figure 1 As shown, the system includes a slewing platform 5, a slewing bearing 4 and a slewing reducer located below the slewing platform 5, and a hoisting mechanism 6 located above the slewing platform 5. The structures of the slewing platform 5, slewing bearing 4, slewing reducer and hoisting mechanism 6 are the same as those of existing slewing cranes. The hoisting mechanism 6 mainly includes a drum device, a motor, a reducer, a brake, etc.

[0027] One end of the boom 3 is hinged to the slewing platform 5, and the other end is connected to one end of the hydraulic cylinder 2 via a pin. This end is also connected to the pulley device 1. That is, the pulley device 1, the hydraulic cylinder 2, and the boom 3 are connected to a single point via a pin. The other end of the hydraulic cylinder 2 is hinged to the conversion rod 8 via the luffing hinge shaft 9, and the other end of the conversion rod 8 is fixedly connected to the slewing shaft device 7.

[0028] like Figure 2 As shown, the conversion rod 8 includes a connecting rod 81, with connecting plates 82 fixed to both ends of the connecting rod 81. The two connecting plates 82 are arranged perpendicularly to each other, and shaft holes 83 are provided on the connecting plates 82. The two shaft holes 83 are used to connect to the slewing shaft device 7 and the hydraulic cylinder 2, respectively. The luffing hinge shaft 9 is a common pin connection node, and the conversion rod 8 is connected to the end of the hydraulic cylinder 2 through one of the shaft holes 83 and the luffing hinge shaft 9.

[0029] like Figure 3As shown, the rotary shaft device 7 includes a support 71, which is a horizontally placed U-shaped structure. In use, its bottom is fixed to the upper structure of the gantry to fix the rotary shaft device 7 to the gantry. A support column 72 is provided on the inner side of the bottom of the support 71, and a flange 73 is connected above the support column 72. The rotary pin 74 passes through the top of the support 71 and one of the shaft holes 83 of the conversion rod 8 in sequence, and is connected to the support column 72 through the flange 73. A bearing 75 is provided between the rotary pin 74 and the flange 73 to reduce the friction between the rotary pin 74 and the flange 73 when the conversion rod 8 drives the rotary pin 74 to rotate.

[0030] From the connection methods of the above-mentioned slewing shaft device 7, conversion rod 8, and luffing hinge shaft 9, it can be seen that, as Figure 1 As shown, the luffing hinge 9 allows the hydraulic cylinder 2 to rotate freely around point C in the luffing motion plane (xy plane) and be fixed in the slewing motion plane (yz plane); the slewing shaft device 7 allows the slewing crane to rotate freely around the slewing center line in the slewing motion plane (yz plane) and be fixed in the luffing motion plane (xy plane).

[0031] The hoisting mechanism 6 and pulley device 1 of this utility model slewing crane are used to realize the function of lifting heavy objects; the slewing bearing 4, slewing platform 5, slewing reducer and slewing shaft device 7 constitute the slewing mechanism, which is used to realize the function of changing the slewing angle of the slewing crane; the hydraulic cylinder 2, boom 3, conversion rod 8 and luffing hinge 9 constitute the luffing mechanism, which is used to realize the function of changing the slewing radius of the slewing crane.

[0032] Hydraulic cylinder 2 is connected to the overall control system of the smart power station, and the control system controls the movement of hydraulic cylinder 2.

[0033] This utility model of a rotary crane changes its slewing radius by adjusting the length of the hydraulic cylinder. Its working principle is as follows:

[0034] The intelligent power station's overall control system issues amplitude-changing commands to the electronic control device of hydraulic cylinder 2. The oil pump pressurizes / extracts fluid into / from hydraulic cylinder 2, pushing / pulling the piston to generate movement. The cylinder body of hydraulic cylinder 2 thus extends / retracts, causing boom 3 to rotate around its lower hinge axis. When the cylinder body length is shortened, the movement changes to... Figure 1 The position of boom 3' shown in the diagram will also be changed to, as shown in the diagram. Figure 1 At positions 1′ and 2′ shown in the diagram, the load and hydraulic cylinder 2 and boom 3 will reach a new force balance at the new positions, thus changing the turning radius.

[0035] Example 2

[0036] The variable-amplitude slewing crane for the hydropower station in this embodiment has the following structure: Figure 1As shown, the system includes a slewing platform 5, with a slewing bearing 4 and a slewing reducer installed below the slewing platform 5, and a lifting mechanism 6 installed above the slewing platform 5. One end of the boom 3 is hinged to the slewing platform 5, and the other end is connected to one end of the hydraulic cylinder 2 via a pin. This end is also connected to a pulley device 1 via a pin. The other end of the hydraulic cylinder 2 is hinged to the conversion rod 8 via a luffing hinge 9, and the other end of the conversion rod 8 is fixedly connected to a slewing shaft device 7.

[0037] Example 3

[0038] The variable-amplitude slewing crane for the hydropower station in this embodiment has the following structure: Figure 1 As shown, the system includes a slewing platform 5, with a slewing bearing 4 and a slewing reducer installed below the slewing platform 5, and a lifting mechanism 6 installed above the slewing platform 5. One end of the boom 3 is hinged to the slewing platform 5, and the other end is connected to one end of the hydraulic cylinder 2 via a pin. This end is also connected to a pulley device 1 via a pin. The other end of the hydraulic cylinder 2 is hinged to the conversion rod 8 via a luffing hinge 9, and the other end of the conversion rod 8 is fixedly connected to a slewing shaft device 7.

[0039] like Figure 2 As shown, the conversion rod 8 includes a connecting rod 81, and both ends of the connecting rod 81 are fixedly connected to connecting plates 82, with the two connecting plates 82 arranged perpendicularly to each other.

[0040] Example 4

[0041] The variable-amplitude slewing crane for the hydropower station in this embodiment has the following structure: Figure 1 As shown, the system includes a slewing platform 5, with a slewing bearing 4 and a slewing reducer installed below the slewing platform 5, and a lifting mechanism 6 installed above the slewing platform 5. One end of the boom 3 is hinged to the slewing platform 5, and the other end is connected to one end of the hydraulic cylinder 2 via a pin. This end is also connected to a pulley device 1 via a pin. The other end of the hydraulic cylinder 2 is hinged to the conversion rod 8 via a luffing hinge 9, and the other end of the conversion rod 8 is fixedly connected to a slewing shaft device 7.

[0042] like Figure 2 As shown, the conversion rod 8 includes a connecting rod 81, and both ends of the connecting rod 81 are fixedly connected to connecting plates 82, with the two connecting plates 82 arranged perpendicularly to each other.

[0043] The connecting plate 82 has shaft holes 83, and the two shaft holes 83 are used to connect to the rotary shaft device 7 and the hydraulic cylinder 2 respectively.

[0044] Example 5

[0045] The variable-amplitude slewing crane for the hydropower station in this embodiment has the following structure: Figure 1As shown, the system includes a slewing platform 5, with a slewing bearing 4 and a slewing reducer installed below the slewing platform 5, and a lifting mechanism 6 installed above the slewing platform 5. One end of the boom 3 is hinged to the slewing platform 5, and the other end is connected to one end of the hydraulic cylinder 2 via a pin. This end is also connected to a pulley device 1 via a pin. The other end of the hydraulic cylinder 2 is hinged to the conversion rod 8 via a luffing hinge 9, and the other end of the conversion rod 8 is fixedly connected to a slewing shaft device 7.

[0046] like Figure 2 As shown, the conversion rod 8 includes a connecting rod 81, and both ends of the connecting rod 81 are fixedly connected to connecting plates 82, with the two connecting plates 82 arranged perpendicularly to each other.

[0047] The connecting plate 82 has shaft holes 83, and the two shaft holes 83 are used to connect to the rotary shaft device 7 and the hydraulic cylinder 2 respectively.

[0048] The luffing hinge shaft 9 is inserted into one of the shaft holes 83 of the conversion rod 8, and the conversion rod 8 is hinged to the hydraulic cylinder 2.

[0049] Example 6

[0050] The variable-amplitude slewing crane for the hydropower station in this embodiment has the following structure: Figure 1 As shown, the system includes a slewing platform 5, with a slewing bearing 4 and a slewing reducer installed below the slewing platform 5, and a lifting mechanism 6 installed above the slewing platform 5. One end of the boom 3 is hinged to the slewing platform 5, and the other end is connected to one end of the hydraulic cylinder 2 via a pin. This end is also connected to a pulley device 1 via a pin. The other end of the hydraulic cylinder 2 is hinged to the conversion rod 8 via a luffing hinge 9, and the other end of the conversion rod 8 is fixedly connected to a slewing shaft device 7.

[0051] like Figure 2 As shown, the conversion rod 8 includes a connecting rod 81, and both ends of the connecting rod 81 are fixedly connected to connecting plates 82, with the two connecting plates 82 arranged perpendicularly to each other.

[0052] The connecting plate 82 has shaft holes 83, and the two shaft holes 83 are used to connect to the rotary shaft device 7 and the hydraulic cylinder 2 respectively.

[0053] The luffing hinge shaft 9 is inserted into one of the shaft holes 83 of the conversion rod 8, and the conversion rod 8 is hinged to the hydraulic cylinder 2.

[0054] like Figure 3 As shown, the rotary shaft device 7 includes a support 71, which is a horizontal U-shaped structure. A support column 72 is provided on the inner side of the bottom of the support 71. A flange 73 is connected above the support column 72. The rotary pin 74 passes through the top of the support 71 and one of the shaft holes 83 of the conversion rod 8 in sequence, and is connected to the support column 72 through the flange 73.

[0055] Example 7

[0056] The variable-amplitude slewing crane for the hydropower station in this embodiment has the following structure: Figure 1 As shown, the system includes a slewing platform 5, with a slewing bearing 4 and a slewing reducer installed below the slewing platform 5, and a lifting mechanism 6 installed above the slewing platform 5. One end of the boom 3 is hinged to the slewing platform 5, and the other end is connected to one end of the hydraulic cylinder 2 via a pin. This end is also connected to a pulley device 1 via a pin. The other end of the hydraulic cylinder 2 is hinged to the conversion rod 8 via a luffing hinge 9, and the other end of the conversion rod 8 is fixedly connected to a slewing shaft device 7.

[0057] like Figure 2 As shown, the conversion rod 8 includes a connecting rod 81, and both ends of the connecting rod 81 are fixedly connected to connecting plates 82, with the two connecting plates 82 arranged perpendicularly to each other.

[0058] The connecting plate 82 has shaft holes 83, and the two shaft holes 83 are used to connect to the rotary shaft device 7 and the hydraulic cylinder 2 respectively.

[0059] The luffing hinge shaft 9 is inserted into one of the shaft holes 83 of the conversion rod 8, and the conversion rod 8 is hinged to the hydraulic cylinder 2.

[0060] like Figure 3 As shown, the rotary shaft device 7 includes a support 71, which is a horizontal U-shaped structure. A support column 72 is provided on the inner side of the bottom of the support 71. A flange 73 is connected above the support column 72. The rotary pin 74 passes through the top of the support 71 and one of the shaft holes 83 of the conversion rod 8 in sequence, and is connected to the support column 72 through the flange 73.

[0061] A bearing 75 is provided between the slewing pin 74 and the flange 73.

[0062] Example 8

[0063] The variable-amplitude slewing crane for the hydropower station in this embodiment has the following structure: Figure 1 As shown, the system includes a slewing platform 5, with a slewing bearing 4 and a slewing reducer installed below the slewing platform 5, and a lifting mechanism 6 installed above the slewing platform 5. One end of the boom 3 is hinged to the slewing platform 5, and the other end is connected to one end of the hydraulic cylinder 2 via a pin. This end is also connected to a pulley device 1 via a pin. The other end of the hydraulic cylinder 2 is hinged to the conversion rod 8 via a luffing hinge 9, and the other end of the conversion rod 8 is fixedly connected to a slewing shaft device 7.

[0064] like Figure 2 As shown, the conversion rod 8 includes a connecting rod 81, and both ends of the connecting rod 81 are fixedly connected to connecting plates 82, with the two connecting plates 82 arranged perpendicularly to each other.

[0065] The connecting plate 82 has shaft holes 83, and the two shaft holes 83 are used to connect to the rotary shaft device 7 and the hydraulic cylinder 2 respectively.

[0066] The luffing hinge shaft 9 is inserted into one of the shaft holes 83 of the conversion rod 8, and the conversion rod 8 is hinged to the hydraulic cylinder 2.

[0067] like Figure 3 As shown, the rotary shaft device 7 includes a support 71, which is a horizontal U-shaped structure. A support column 72 is provided on the inner side of the bottom of the support 71. A flange 73 is connected above the support column 72. The rotary pin 74 passes through the top of the support 71 and one of the shaft holes 83 of the conversion rod 8 in sequence, and is connected to the support column 72 through the flange 73.

[0068] A bearing 75 is provided between the slewing pin 74 and the flange 73.

[0069] Hydraulic cylinder 2 is connected to the overall control system of the smart power station, and the control system controls the movement of hydraulic cylinder 2.

Claims

1. A variable amplitude slewing crane for a hydroelectric power station, characterised in that, The rotary platform (5) is provided below with a rotary support (4) and a rotary reducer, and above with a lifting mechanism (6); one end of the boom (3) is hinged to the rotary platform (5), and the other end is connected to one end of the hydraulic oil cylinder (2) through a pin shaft, and the end is also connected with the pulley device (1) through a pin shaft; the other end of the hydraulic oil cylinder (2) is hinged to the conversion rod piece (8) through the luffing hinge shaft (9), and the other end of the conversion rod piece (8) is fixedly connected with the rotary shaft device (7); the conversion rod piece (8) comprises a connecting rod (81), both ends of the connecting rod (81) are fixedly connected with connecting plates (82), and the two connecting plates (82) are arranged perpendicular to each other.

2. The hydroelectric plant variable amplitude slewing crane of claim 1, wherein, The connecting plate (82) is provided with an axle hole (83), and the two axle holes (83) are respectively used for connecting with the rotary shaft device (7) and the hydraulic oil cylinder (2).

3. The hydroelectric plant variable amplitude slewing crane of claim 2, wherein, The luffing hinge shaft (9) is inserted into one of the axle holes (83) of the conversion rod piece (8), and the conversion rod piece (8) is hinged to the hydraulic oil cylinder (2).

4. The hydroelectric plant variable amplitude slewing crane of claim 2, wherein, The rotary shaft device (7) comprises a support (71), which is a transversely arranged U-shaped structure, and a supporting column (72) is arranged on the inner side of the bottom of the support (71), a flange (73) is connected above the supporting column (72), and a rotary pin shaft (74) passes through the top of the support (71) and one of the axle holes (83) of the conversion rod piece (8) in sequence, and is connected with the supporting column (72) through the flange (73).

5. The hydroelectric plant variable amplitude slewing crane of claim 4, wherein, A bearing (75) is arranged between the rotary pin shaft (74) and the flange (73).

6. The hydroelectric plant variable amplitude slewing crane of claim 1, wherein, The hydraulic oil cylinder (2) is connected to the intelligent power station overall control system, and the action of the hydraulic oil cylinder (2) is controlled by the control system.

7. The hydroelectric plant variable amplitude slewing crane of claim 1, wherein, The rotary shaft device (7) is fixed on the upper structure of the portal frame.

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