Portal crane for hydropower station

Abstract

The utility model provides a gantry crane for a hydropower station, which comprises a track, a crane main body and a controller, the bottom of the crane main body is provided with a cart running mechanism matched with the track, and the cart running mechanism is provided with a cart running motor for driving the cart running mechanism to move along the track. A trigger component is fixedly arranged in the middle of the outer side of the cart running mechanism, a positioning unit corresponding to the gate plate in position is arranged on one side of the track, and the positioning unit is matched with the trigger component. According to the utility model, the position between the positioning unit and the flashboard is always kept unchanged, the position between the trigger part and the crane main body is always kept unchanged, the positioning unit and the trigger part are matched to realize the positioning between the crane main body and the flashboard, the positioning is not easy to deviate, the positioning precision is ensured, and regular correction is not needed; and the later maintenance workload is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cranes, and in particular relates to a gantry crane for a hydropower station. Background Art

[0002] Gantry cranes are usually installed on the top of the dam of a hydropower station, and are used to lift and open and close gates and trash racks.

[0003] In the prior art, the Chinese utility model patent document with the authorization announcement number CN202508785U discloses a gantry crane for a hydropower station, which moves on the dam top through a trolley running mechanism, corresponding to different tailwater gates, to lift and open and close the gates and trash racks. The trolley running mechanism needs to make the crane correspond to different tailwater gates during the movement. At present, the method commonly used is to encode the running wheels of the trolley running mechanism to collect the moving distance of the trolley running mechanism. Since the distance between the gates is fixed, the positioning between the crane and the gate can be achieved by controlling the moving distance of the trolley running mechanism. However, during the operation, due to the influence of factors such as slippage between the running wheels and the track and accumulated errors, the positioning is prone to deviations, which requires regular correction, affecting the positioning accuracy and increasing the maintenance workload.

[0004] Therefore, it is necessary to design a gantry crane for hydropower stations that is not prone to positioning deviations, ensures positioning accuracy, does not require regular calibration, and reduces the workload of later maintenance to solve the current technical problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the utility model provides a gantry crane for a hydropower station which is not prone to positioning deviation, ensures positioning accuracy, does not require regular calibration, and reduces the workload of subsequent maintenance.

[0006] The technical solution of the utility model is: a gantry crane for a hydropower station, comprising a track, a crane body and a controller, a trolley running mechanism matched with the track is arranged at the bottom of the crane body, the trolley running mechanism has a trolley running motor driving it to move along the track, a trigger component is fixedly arranged at the center of the outer side of the trolley running mechanism, a positioning unit corresponding to the gate position is arranged on one side of the track, the positioning unit cooperates with the trigger component, the positioning unit has a positioning proximity switch corresponding to the center position of the gate, the positioning proximity switch is respectively provided with a first auxiliary proximity switch and a second auxiliary proximity switch on both sides along the track direction, the positioning proximity switch, the first auxiliary proximity switch and the second auxiliary proximity switch are all connected to the controller, a trolley frequency converter is connected to the controller, and the trolley frequency converter is connected to the trolley running motor.

[0007] The trigger component has a trigger plate, and the positioning proximity switch, the first auxiliary proximity switch and the second auxiliary proximity switch all correspond to the trigger plate.

[0008] A shell is slidably provided at one end of the trigger plate in the vertical direction, the shell is fixedly provided on one side of the trolley running mechanism, a screw rod perpendicular to the trigger plate is rotatably provided on the shell, and the screw rod is threadedly connected to the trigger plate.

[0009] The upper end of the screw rod is provided with a hexagonal column, and a locking nut is assembled on the outer side of the upper end of the screw rod.

[0010] Two guide rods perpendicular to the trigger plate are symmetrically arranged inside the shell, and the trigger plate is slidably connected to the guide rods.

[0011] The outer side of the shell is symmetrically provided with a mounting plate, and the mounting plate is detachably fixedly assembled on the outer side of the trolley running mechanism by bolts.

[0012] Rail clamps matching the rails are arranged at both ends of the trolley running mechanism, and the rail clamps are connected to the controller.

[0013] Beneficial effects of the utility model:

[0014] (1) In the present invention, the position between the positioning unit and the gate plate remains unchanged, and the position between the trigger component and the crane body remains unchanged. The positioning unit and the trigger component cooperate to realize the positioning between the crane body and the gate plate. Positioning deviation is not easy to occur, and positioning accuracy is guaranteed. No regular calibration is required, which reduces the workload of later maintenance.

[0015] (2) When the trolley running motor drives the trolley running mechanism to move on the track, after the first auxiliary proximity switch or the second auxiliary proximity switch of the designated gate is triggered, the controller sends a command to the trolley inverter to make the trolley running motor drive the trolley running mechanism to slow down and facilitate subsequent positioning. After the positioning proximity switch is triggered, the controller sends a command to the trolley inverter to stop the trolley running motor, and the crane is positioned above the corresponding gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a gantry crane for a hydropower station in the utility model.

[0017] Figure 2 This is a principle block diagram of the gantry crane used in the hydropower station in the utility model.

[0018] Figure 3 It is a structural schematic diagram of the trigger component in the utility model. DETAILED DESCRIPTION

[0019] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is by no means intended to limit the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete and to fully express the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0020] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] like Figure 1 and 2As shown, a gantry crane for a hydropower station comprises a track 8, a crane body 2 and a controller 5. A trolley running mechanism 1 matched with the track 8 is arranged at the bottom of the crane body 2. The trolley running mechanism 1 has a trolley running motor 11 that drives it to move along the track 8. A trigger component 4 is fixedly arranged at the center of the outer side of the trolley running mechanism 1. A positioning unit 3 corresponding to the position of the gate is arranged on one side of the track 8. The positioning unit 3 cooperates with the trigger component 4. The positioning unit 3 has a positioning proximity switch 31 corresponding to the center position of the gate. The first auxiliary proximity switch 32 and the second auxiliary proximity switch 33 are respectively arranged on both sides of the positioning proximity switch 31 along the direction of the track 8. The positioning proximity switch 31, the first auxiliary proximity switch 32 and the second auxiliary proximity switch 33 are all connected to the controller 5. The controller 5 is connected to a trolley frequency converter 6. The trolley frequency converter 6 is connected to the trolley running mechanism 1. The traveling motor 11 is connected; in the present embodiment, the position between the positioning unit 3 and the gate plate remains unchanged, the position between the trigger component 4 and the crane body 2 remains unchanged, the positioning unit 3 cooperates with the trigger component 4 to realize the positioning between the crane body 2 and the gate plate, and the positioning is not prone to deviation, thereby ensuring the positioning accuracy, and no regular calibration is required, thereby reducing the workload of later maintenance; when the trolley running motor 11 drives the trolley running mechanism 1 to move on the track 8, after the first auxiliary proximity switch 32 or the second auxiliary proximity switch 33 of the designated gate is triggered, the controller 5 sends an instruction to the trolley inverter 6 to make the trolley running motor 11 drive the trolley running mechanism 1 to decelerate for subsequent positioning, and after the positioning proximity switch 31 is triggered, the controller 5 sends an instruction to the trolley inverter 6 to stop the trolley running motor 11, and the crane is positioned above the corresponding gate.

[0022] In some embodiments, Figure 3 As shown, the trigger component 4 has a trigger plate 43, and the positioning proximity switch 31, the first auxiliary proximity switch 32 and the second auxiliary proximity switch 33 all correspond to the trigger plate 43; the positioning proximity switch 31, the first auxiliary proximity switch 32 and the second auxiliary proximity switch 33 are all proximity switches, and when the trigger plate 43 moves above them, they are just triggered.

[0023] In some embodiments, a shell 41 is slidably provided at one end of the trigger plate 43 in the vertical direction. The shell 41 is fixedly provided on one side of the trolley running mechanism 1. A screw 45 perpendicular to the trigger plate 43 is rotatably provided on the shell 41. The screw 45 is threadedly connected to the trigger plate 43. By rotating the screw 45, the threaded structure between the screw 45 and the trigger plate 43 can drive the trigger plate 43 to move up and down, thereby realizing the position adjustment of the trigger plate 43. During debugging, the height of the trigger plate 43 can be adjusted to be moderate, which can just trigger the positioning proximity switch 31, the first auxiliary proximity switch 32 and the second auxiliary proximity switch 33.

[0024] In some embodiments, the upper end of the screw rod 45 has a hexagonal prism 46, and the hexagonal prism 46 can be used to easily rotate the screw rod 45 to adjust the position of the trigger plate 43. A locking nut 47 is installed on the outer side of the upper end of the screw rod 45. After the position of the trigger plate 43 is adjusted, the screw rod 45 and the housing 41 can be locked by the locking nut 47.

[0025] In some embodiments, two guide rods 44 perpendicular to the trigger plate 43 are symmetrically disposed inside the housing 41 , and the trigger plate 43 is slidably connected to the guide rods 44 .

[0026] In some embodiments, as a specific installation method of the shell 41, a mounting plate 42 is symmetrically provided on the outer side of the shell 41, and the mounting plate 42 is detachably fixedly assembled on the outer side of the trolley running mechanism 1 by bolts.

[0027] In some embodiments, both ends of the trolley operating mechanism 1 are provided with track clamps 7 that cooperate with the track 8. The track clamps 7 are connected to the controller 5. After the trolley operating mechanism 1 stops, the controller 5 controls the track clamps 7 to operate, lock the trolley operating mechanism 1 and the track 8, and improve the stability of the crane body 2.

[0028] So far, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concept of the present invention, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0029] The above-mentioned embodiments only express some implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A gantry crane for a hydropower station, characterized in that: It includes a track, a crane body and a controller. A trolley running mechanism matched with the track is arranged at the bottom of the crane body. The trolley running mechanism has a trolley running motor that drives it to move along the track. A trigger component is fixedly arranged at the center of the outer side of the trolley running mechanism. A positioning unit corresponding to the gate position is arranged on one side of the track. The positioning unit cooperates with the trigger component. The positioning unit has a positioning proximity switch corresponding to the center position of the gate. The positioning proximity switch is respectively provided with a first auxiliary proximity switch and a second auxiliary proximity switch on both sides along the track direction. The positioning proximity switch, the first auxiliary proximity switch and the second auxiliary proximity switch are all connected to the controller. A trolley frequency converter is connected to the controller, and the trolley frequency converter is connected to the trolley running motor.

2. The gantry crane for a hydropower station according to claim 1, characterized in that: The trigger component has a trigger plate, and the positioning proximity switch, the first auxiliary proximity switch and the second auxiliary proximity switch all correspond to the trigger plate.

3. The gantry crane for a hydropower station according to claim 2, characterized in that: A shell is slidably provided at one end of the trigger plate in the vertical direction, the shell is fixedly provided on one side of the trolley running mechanism, a screw rod perpendicular to the trigger plate is rotatably provided on the shell, and the screw rod is threadedly connected to the trigger plate.

4. The gantry crane for a hydropower station according to claim 3, characterized in that: The upper end of the screw rod is provided with a hexagonal column, and a locking nut is assembled on the outer side of the upper end of the screw rod.

5. The gantry crane for a hydropower station according to claim 3, characterized in that: Two guide rods perpendicular to the trigger plate are symmetrically arranged inside the shell, and the trigger plate is slidably connected to the guide rods.

6. The gantry crane for a hydropower station according to claim 3, characterized in that: The outer side of the shell is symmetrically provided with a mounting plate, and the mounting plate is detachably fixedly assembled on the outer side of the trolley running mechanism by bolts.

7. The gantry crane for a hydropower station according to claim 1, characterized in that: Rail clamps matching the rails are arranged at both ends of the trolley running mechanism, and the rail clamps are connected to the controller.

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