Arrangement structure of a hydraulic hoist for a pumped-storage power station

Abstract

The present invention discloses an arrangement structure of a hydraulic hoist for a pumped storage power station, which includes a hydraulic hoist assembly, a gate slot and a gate. The hydraulic hoist assembly is installed above the gate slot, and the gate is installed in the gate slot. The hydraulic hoist assembly includes a hydraulic system, a hydraulic cylinder, an electric control system, a sealing cover plate, a locking device, a limiting device, an exhaust device and a pipeline system. The hydraulic cylinder is connected to the sealing cover plate through a flange and bolts. The locking device, the limiting device and the exhaust device are all fixedly connected to the sealing cover plate through bolts. The hoist of the present invention is provided with a locking device and a limiting device, which increases the safety guarantee for the whole system, enables the gate to be protected in time and gives a warning when an accidental fall occurs, and greatly reduces the losses of the power plant.

Description

Technical Field

[0001] The present invention relates to the technical field of the structure of hydraulic hoists, and in particular to an arrangement structure of a hydraulic hoist for a pumped - storage power station, which is used to control the lifting of a gate to improve safety. Background Art

[0002] A hydraulic hoist generally consists of a hydraulic system and a hydraulic cylinder. Under the control of the hydraulic system, the piston body in the hydraulic cylinder makes an axial reciprocating motion, thereby driving the connecting rod and the gate connected to the piston to make a linear motion to achieve the purpose of opening and closing the orifice.

[0003] In terms of the installation method, limited by the actual working conditions of the project, the part below the ground is filled with water and has a certain water pressure. Therefore, a sealing cover plate is provided at the top of the gate slot. The sealing cover plate is fixed to the gate slot by bolts, and the hydraulic hoist is installed on the top of the sealing cover plate. Since the gate is below the sealing cover plate and is immersed in water for a long time, components such as the gate lugs and the hanging shafts will be corroded. If the corrosion is severe and the gate is disconnected from the hydraulic cylinder, the gate will fall accidentally. Moreover, since the gate is in a sealed gate slot, the situation of the gate cannot be visually observed. If the gate falls accidentally, it will cause huge losses to the power plant. Therefore, it is necessary to improve the existing arrangement structure of the hydraulic hoist. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide an improved arrangement structure of a hydraulic hoist in order to solve the problems existing in the above - mentioned background art.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an arrangement structure of a hydraulic hoist for a pumped - storage power station, including a hydraulic hoist assembly, a gate slot and a gate. The hydraulic hoist assembly is installed above the gate slot, the gate is installed in the gate slot. The hydraulic hoist assembly includes a hydraulic system, a hydraulic cylinder, an electric control system, a sealing cover plate, a locking device, a limiting device, an exhaust device and a pipeline system. The hydraulic cylinder is connected to the sealing cover plate by a flange and bolts. The locking device, the limiting device and the exhaust device are all fixedly connected to the sealing cover plate by bolts;

[0006] The limiting device includes a limit switch, a sealing box, a pendulum, a lever and a push rod. A first rotating shaft is arranged on the sealing box. The left and right ends of the first rotating shaft are respectively connected to the pendulum and the lever. The push rod passes through the limit hole on the sealing cover plate and is fixed to the gate by bolts. When the gate is opened and the push rod moves upward, the lever is rotated upward by the push rod. The lever drives the pendulum to rotate upward synchronously through the first rotating shaft. When the gate is closed and the push rod moves downward, the pendulum rotates downward due to its own weight until it touches the limit switch;

[0007] The locking devices are respectively arranged on the left and right sides of the sealing cover plate. The locking device includes a mounting plate, on which a sealing box frame is arranged. The upper end of the sealing box frame is connected with a locking cylinder, and the lower end is connected with a toggle arm and a hook assembly through a second rotating shaft. One end of the toggle arm is connected to the output end of the locking cylinder, and the other end is connected with a counterweight. The hook assembly extends below the sealing cover plate through a mounting hole and cooperates with the gate to lock after rotation.

[0008] By adopting the above technical solutions, the position of the gate can be monitored in real time. The pendulum on the limit device is lifted as the gate rises. When the gate descends, the pendulum descends to touch the limit switch on the limit device, and the electronic control system receives this signal to alarm or start emergency measures. Moreover, the gate that accidentally disengages and falls can be locked by the locking device in time to prevent accidents and reduce losses.

[0009] Further, the hook assembly of the present invention includes a suspension rod connected to the second rotating shaft. Two parallel distributed hanging plates are arranged at the lower end of the suspension rod, and the two hanging plates are connected by a pin shaft at the lower end part.

[0010] Further, the central end of the gate of the present invention is connected to the piston rod of the hydraulic cylinder, and locking convex parts cooperating with the hook assembly are also arranged at the left and right ends of the gate.

[0011] By adopting the above technical solutions, a gap is formed between the two hanging plates. Usually, the locking device is in the locked state, and the hook assembly rotates to the vertically downward state under the action of the locking cylinder. At this time, the locking convex part is inserted into the above gap and is located above the pin shaft, which can effectively lock to prevent the gate from completely falling when the gate accidentally falls.

[0012] When the gate is normally closed, the system is depressurized, the locking device is unlocked, the piston rod of the hydraulic cylinder extends out, and the gate descends.

[0013] Further, the sealing cover plate of the present invention is fixed to the top of the gate slot by bolts.

[0014] Further, the bottom surface of the flange of the present invention is a horizontal plane and is welded to the base surface of the sealing cover plate to prevent water leakage under the sealing cover plate.

[0015] Further, a sealing ring is also arranged between the piston rod and the sealing cover plate of the present invention.

[0016] Further, the pipeline system of the present invention includes several oil pipes connected to the hydraulic system. The oil pipes are arranged above the sealing cover plate, and the oil pipes are segmented and butt-jointed by using quick couplings at the place where they are separated from the sealing cover plate.

[0017] By adopting the above technical solution, compared with the connection arrangement of the previous pipeline system, a union joint is added to the external pipeline of the sealing cover plate. When disassembling and assembling the sealing cover plate for maintenance in the later stage, it is not necessary to remove the pipeline on the cover plate. Only by loosening the union joint, the sealing cover plate can be lifted as a whole.

[0018] Further, the oil pipeline of the present invention is a steel pipe, and the oil pipeline is butt-jointed with each device in the hydraulic hoist assembly through a high-pressure hose added at the adjacent connection position;

[0019] By adopting the above technical solution, compared with the connection arrangement of the previous pipeline system, a high-pressure hose is added in front of the equipment that needs to be finely adjusted in position during the debugging stage, which is convenient for the adjustment of the equipment.

[0020] The beneficial effects of the present invention are: the defects in the background technology are solved, and it has the following advantages:

[0021] 1. The fitting installation layout between the sealing cover plate and each device is more reasonable and more user-friendly. For example, the new flange installation and sealing structure with the hydraulic cylinder further improves the installation stability and effectively prevents water leakage.

[0022] 2. The limit device installed on the sealing cover plate can monitor the position of the gate in real time. The pendulum on the limit device rises as the gate rises. When the gate descends, the pendulum descends, thus triggering the limit switch on the limit device to trigger an alarm.

[0023] 3. The added locking device can lock the gate that accidentally disengages and falls in time, prevent accidents from occurring, and reduce losses.

[0024] 4. The addition of union joints in the pipeline system enables the device not to completely remove the pipeline during hoisting, and the application of high-pressure hoses no longer requires repeated copper pipe welding operations when debugging the equipment, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a preferred embodiment of the present invention;

[0026] Figure 2 is a schematic plan view of the overall layout of the present invention;

[0027] Figure 3 is a schematic three-dimensional view showing the overall layout on the sealing cover plate of the present invention;

[0028] Figure 4 is a schematic structural diagram showing the connection position between the gate and the hoist of the present invention;

[0029] Figure 5 is a schematic plan view of the limit device of the present invention;

[0030] Figure 6 It is a schematic three-dimensional structure diagram of the limiting device in the present invention;

[0031] Figure 7 It is a schematic structure diagram of the locking device in the present invention;

[0032] Figure 8 It is a schematic structure diagram of the locking device in the unlocked state in the present invention; Detailed implementation manners

[0033] Now, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0034] As Figures 1 to 8 shown, a layout structure of a hydraulic hoist for a pumped storage power station includes a hydraulic hoist assembly, a gate slot 1 and a gate 2. The hydraulic hoist assembly is installed above the gate slot 1, and the gate 2 is installed in the gate slot 1. The hydraulic hoist assembly includes a hydraulic system 3, a hydraulic cylinder 4, an electric control system 5, a sealing cover plate 6, a locking device 7, a limiting device 8, an exhaust device 9 and a pipeline system 10. The hydraulic cylinder 4 is connected to the sealing cover plate 6 through a flange and bolts. The locking device 7, the limiting device 8 and the exhaust device 9 are all fixedly connected to the sealing cover plate 6 through bolts;

[0035] The limiting device includes a limit switch 81, a sealing box 82, a pendulum 83, a lever 84 and a push rod 85. A first rotating shaft 86 is arranged on the sealing box 82. The left and right ends of the first rotating shaft 86 are respectively connected to the pendulum 83 and the lever 84. The push rod 85 passes through a limit hole on the sealing cover plate 6 and is fixed to the gate 2 through bolts. When the gate 2 is opened and the push rod 85 moves upward, the lever 84 is rotated upward and lifted. The lever 84 drives the pendulum 83 to rotate upward synchronously through the first rotating shaft 86. When the gate 2 is closed and the push rod 85 moves downward, the pendulum 83 rotates downward due to its own weight until it touches the limit switch 81;

[0036] The locking devices 7 are respectively arranged on the left and right sides of the sealing cover plate 6. The locking device 7 includes a mounting plate 71. A sealing box frame 72 is arranged on the mounting plate 71. The upper end of the sealing box frame 72 is connected to a locking cylinder 73, and the lower end is connected to a toggle arm 75 and a hook assembly through a second rotating shaft 74. One end of the toggle arm 75 is connected to the output end of the locking cylinder 73, and the other end is connected to a counterweight 76. The hook assembly extends out below the sealing cover plate 6 through a mounting hole and cooperates with the gate 2 to lock after rotation.

[0037] Among them, the hook assembly includes a hanging rod 77 connected to the second rotating shaft 74. At the lower end of the hanging rod 77, there are two parallelly distributed hanging plates 78, and the two hanging plates 78 are connected by a pin shaft 79 at the lower end part;

[0038] The central end of the gate 2 is connected to the piston rod of the hydraulic cylinder 4, and locking convex parts 21 that cooperate with the hook assembly are also provided at the left and right ends of the gate 2.

[0039] The sealing cover plate 6 is fixed to the top of the gate slot 1 by bolts. The bottom surface of the flange is a horizontal plane and is welded to the base surface of the sealing cover plate 6. A sealing ring is also provided between the piston rod and the sealing cover plate 6 to prevent water leakage under the sealing cover plate.

[0040] The pipeline system 10 includes several oil pipes connected to the hydraulic system 3. The oil pipes are arranged above the sealing cover plate 6, and the oil pipes are segmented and butt-jointed by a union joint 11 at the place where they are separated from the sealing cover plate 6;

[0041] The oil pipes are steel pipes, and the oil pipes are butt-jointed by adding high-pressure hoses 12 at the adjacent connection parts with each device in the hydraulic hoist assembly.

[0042] Working principle:

[0043] Usually, the locking device is in the locked state. The hook assembly rotates to the downward vertical state under the action of the locking cylinder. At this time, the locking convex part inserts into the above-mentioned gap and is located above the pin shaft. When the gate accidentally falls, it can be effectively locked to prevent it from falling completely; and the pendulum in the limit device can move along with the up and down movement of the gate, cooperate with the limit switch to detect the height of the gate at any time, and trigger the limit switch by swinging to send out an alarm in time when the gate accidentally falls.

[0044] When the gate is normally closed, the system is depressurized, the locking device is unlocked, the piston rod of the hydraulic cylinder extends, and the gate descends.

[0045] During commissioning and installation: Compared with the connection arrangement of the previous pipeline system, high-pressure hoses are added in front of the equipment that needs to be finely adjusted in the commissioning stage, which is convenient for the adjustment of the equipment. In the past, they were all steel pipes, saving the operation of repeated welding often carried out in the previous commissioning process.

[0046] During hoisting: Compared with the connection arrangement of the previous pipeline system, union joints are added to the external pipelines of the sealing cover plate. When maintaining the sealing cover plate by disassembling and assembling it later, it is not necessary to remove the pipelines on the cover plate. Just loosen the union joints, and the sealing cover plate can be hoisted as a whole (in the past, there was no union joint, and when disassembling and assembling the sealing cover plate, all the oil pipes on the cover plate needed to be removed).

[0047] The specific embodiments described in the above specification are only examples of the present invention. Various examples do not limit the essence of the present invention. Those of ordinary skill in the art can make modifications or variations to the specific embodiments described above after reading the specification, without departing from the essence and scope of the invention.

Claims

1. An arrangement structure of a hydraulic hoist for a pumped-storage power station, comprising a hydraulic hoist assembly, a gate slot (1) and a gate (2). The hydraulic hoist assembly is installed above the gate slot (1), and the gate (2) is installed in the gate slot (1). It is characterized in that: The described hydraulic hoist assembly includes a hydraulic system (3), a hydraulic cylinder (4), an electric control system (5), a sealing cover plate (6), a locking device (7), a limit device (8), an exhaust device (9), and a pipeline system (10). The hydraulic cylinder (4) is connected to the sealing cover plate (6) by a flange and bolts. The locking device (7), the limit device (8), and the exhaust device (9) are all fixedly connected to the sealing cover plate (6) by bolts; The described limit device includes a limit switch (81), a sealing box (82), a pendulum (83), a lever (84), and a push rod (85). A first rotating shaft (86) is provided on the sealing box (82). The left and right ends of the first rotating shaft (86) are respectively connected to the pendulum (83) and the lever (84). The push rod (85) passes through the limit hole on the sealing cover plate (6) and is fixed to the gate (2) by bolts. When the gate (2) opens and the push rod (85) moves upward, the lever (84) is rotated upward and lifted. The lever (84) drives the pendulum (83) to rotate upward synchronously through the first rotating shaft (86). When the gate (2) closes and the push rod (85) moves downward, the pendulum (83) rotates downward due to its own weight until it touches the limit switch (81); The described locking devices (7) are respectively arranged on the left and right sides of the sealing cover plate (6). The locking device (7) includes a mounting plate (71). A sealing box frame (72) is provided on the mounting plate (71). A locking cylinder (73) is connected to the upper end of the sealing box frame (72), and a toggle arm (75) and a hook assembly are connected to the lower end through a second rotating shaft (74). One end of the toggle arm (75) is connected to the output end of the locking cylinder (73), and the other end is connected with a counterweight (76). The hook assembly extends out below the sealing cover plate (6) through the mounting hole and cooperates with the gate (2) for locking after rotation.

2. The layout structure of a hydraulic hoist for a pumped storage power station according to claim 1, wherein: The described hook assembly includes a suspension rod (77) connected to the second rotating shaft (74). Two parallel distributed hanging plates (78) are provided at the lower end of the suspension rod (77). The two hanging plates (78) are connected by a pin shaft (79) at the lower end.

3. The layout structure of a hydraulic hoist for a pumped storage power station according to claim 1, characterized in that: The central end of the gate (2) is connected to the piston rod of the hydraulic cylinder (4). Locking convex parts (21) that cooperate with the hook assembly are also provided at the left and right ends of the gate (2).

4. The layout structure of a hydraulic hoist for a pumped storage power station according to claim 1, characterized in that: The sealing cover plate (6) is fixed to the top of the gate slot (1) by bolts.

5. The layout structure of a hydraulic hoist for a pumped storage power station according to claim 1, characterized in that: The bottom surface of the flange is a horizontal plane and is welded to the base surface of the sealing cover plate (6).

6. The layout structure of a hydraulic hoist for a pumped storage power station according to claim 3, characterized in that: A sealing ring is also provided between the piston rod and the sealing cover plate (6).

7. The layout structure of a hydraulic hoist for a pumped storage power station according to claim 1, characterized in that: The described pipeline system (10) contains several oil pipes connected to the hydraulic system (3). The oil pipes are arranged above the sealing cover plate (6). The oil pipes are segmented and butt-jointed by a union joint (11) at the place where they are separated from the sealing cover plate (6).

8. The layout structure of a hydraulic hoist for a pumped storage power station according to claim 7, characterized in that: The described oil pipes are steel pipes. The oil pipes are butt-jointed by adding high-pressure hoses (12) at the adjacent connection parts with each device in the hydraulic hoist assembly.

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