Maintenance equipment for main distributing valve of speed regulator of hydropower station

Abstract

The utility model relates to the technical field of overhauling hoisting devices, and discloses a hydropower station governor main distributing valve overhauling device which comprises a T-shaped positioning bottom plate, a first motor capable of being driven is fixedly installed on the wall face of the lower side wall of the horizontal end of the positioning bottom plate, and the output end of the first motor is in transmission connection with an installation sleeve. And a mounting sleeve capable of limiting is rotationally mounted on the upper side wall surface of the horizontal end of the positioning bottom plate, and a connecting moving rod capable of limiting is movably mounted in the mounting sleeve. The device can be fixedly installed on the outer wall of the main distributing valve in advance, when a sealing cover on the main distributing valve needs to be detached, the movable end of the hydraulic push rod moves upwards, the connecting moving rod begins to move upwards, the fixing frame moves upwards, the lifting steel wire and the lifting hook lift the sealing cover till the hydraulic push rod extends to the maximum position, and then the sealing cover is detached. And then the first motor is started, so that the mounting sleeve rotates in the horizontal direction until the sealing cover is far away from the main distributing valve.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance hoisting devices, in particular to maintenance equipment for a main pressure regulating valve of a speed regulator of a hydropower station. Background Art

[0002] The opening of the main pressure regulating valve of the speed regulator of Longtan Hydropower Station is 250mm. It has the largest flow rate and volume among the existing pressure regulating valves in China. When repairing the main pressure regulating valve, it is necessary to first remove the upper end cover of the main pressure regulating valve and then remove the piston and bushing of the main pressure regulating valve. At present, when removing the upper end cover, piston and bushing of the main pressure regulating valve, workers can only rely on manually erecting scaffolding. Then workers stand on the scaffolding to remove the upper end cover, piston and bushing of the main pressure regulating valve respectively. The upper end cover of the main pressure regulating valve weighs about 120Kg, each piston weighs about 100Kg, and the bushing weighs about 50Kg. It requires several workers to cooperate in each removal. In addition, the assembly clearance between the piston and bushing is 0.10mm. It is difficult to remove the piston manually, which is time-consuming and labor-intensive, seriously reducing work efficiency.

[0003] When disassembling the upper end cover, piston and bushing of the main pressure regulating valve, the staff need to manually disassemble the upper end cover, piston and bushing, which are relatively heavy. The erected scaffolding needs to be disassembled after the maintenance is completed and the main pressure regulating valve switch test is passed. It needs to be re-erected for the second maintenance. Both erection and disassembly take a long time, the operation is cumbersome, and maintenance is inconvenient.

[0004] Therefore, we propose a maintenance equipment for the main pressure regulating valve of the hydropower station governor. Utility Model Content

[0005] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a maintenance device for a main pressure regulating valve of a speed regulator of a hydropower station.

[0006] The cam is fixedly mounted on the support frame of the lifting link, and the cam is installed in the cam face, and the cam face has the cam face and the cam face has a bottom end, and the cam face has a bottom end, and the cam face has a bottom end.

[0007] Preferably, a horizontally arranged fixing plate is fixedly mounted on the rear outer wall of the mounting sleeve, a vertically arranged connecting slide is fixedly mounted on the upper wall of the fixing plate, and the outer wall of the connecting slide movably passes through the upper and lower walls of the fixing frame.

[0008] Preferably, a fixed connecting plate is fixedly installed on the outer wall of the lifting wire, and the fixed connecting plate is arranged in a horizontal state. The outer wall of the fixed plate movably passes through the upper and lower wall surfaces of the fixed connecting plate.

[0009] Preferably, the driving mechanism includes two sets of mounting plates and a second motor for driving, and the two sets of mounting plates are fixedly mounted on the upper side wall of the fixing frame.

[0010] Preferably, the second motor is fixedly mounted on the front wall of the front mounting plate, the winding wheel is arranged between the adjacent walls of the two sets of mounting plates, and the output end of the second motor is transmission-connected to the winding wheel.

[0011] Preferably, the bottom wall of the fixing frame is provided with a connecting groove which passes through the upper and lower walls thereof, the outer wall of the lifting wire moves through the interior of the connecting groove, and two sets of limiting rollers are rotatably installed inside the connecting groove.

[0012] Preferably, the outer wall of the lifting wire moves through the position between two sets of limiting rollers, and the two sets of limiting rollers are both arranged in a horizontal state.

[0013] Beneficial effects

[0014] The utility model provides a maintenance device for the main pressure regulating valve of a hydropower station speed regulator. It has the following beneficial effects:

[0015] 1. A maintenance device for a main pressure-regulating valve of a hydropower station speed regulator. During use, the utility model can pre-fix the device on the outer wall of the main pressure-regulating valve. When the sealing cover on the main pressure-regulating valve needs to be removed, the movable end of the hydraulic push rod moves upward, the connecting moving rod starts to move upward, the fixing frame moves upward, the lifting wire and the lifting hook lift the sealing cover until the hydraulic push rod is extended to the maximum position, and then the first motor is turned on to rotate the mounting sleeve in the horizontal direction until the sealing cover is away from the main pressure-regulating valve. At this time, the driving mechanism is used to rotate the winding wheel forward to release the lifting wire wrapped around its outer wall, and the sealing cover moves downward until it contacts the ground. The operation is simple and convenient, and it is convenient for disassembly and maintenance of the main pressure-regulating valve.

[0016] 2. A maintenance device for the main pressure regulating valve of a hydropower station speed regulator. During use, the utility model opens the mounting plate to rotate the winding wheel, and the lifting wire passes through the position between the two sets of limit rollers during movement. Since the two sets of limit rollers are rotatably installed, the wear between the lifting wire and the connecting groove can be reduced, thereby extending its service life. In addition, during the movement of the lifting wire, the fixed connecting plate will follow the lifting wire and move along the outer wall of the connecting slide rod. Since the distance between the fixed connecting plate and the lifting hook is fixed, the length of the lifting wire between the fixed connecting plate and the lifting hook is certain, so that the swing amplitude of the lifting wire is within a certain range, and its swing amplitude will not increase with the elongation of the limit roller, which can improve the stability during lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the entire utility model;

[0018] Figure 2 This is a sectional perspective view of the installation sleeve of the utility model;

[0019] Figure 3 for Figure 2 A magnified view of location A.

[0020] Legend: 1. Positioning base plate; 2. First motor; 3. Mounting sleeve; 4. Connecting shift rod; 5. Fixing frame; 6. Lifting wire; 7. Lifting hook; 8. Hydraulic push rod; 9. Fixing plate; 10. Connecting slide rod; 11. Fixing connecting plate; 12. Mounting plate; 13. Second motor; 14. Winding wheel; 15. Connecting slot; 16. Limiting roller. DETAILED DESCRIPTION

[0021] Example 1: A maintenance device for a main pressure regulating valve of a hydropower station governor, such as Figure 1 、 Figure 2 and Figure 3As shown, it includes a positioning base plate 1, which can be pre-installed on the outer wall of the main pressure regulating valve. The positioning base plate 1 is T-shaped, and the lower side wall surface of the horizontal end of the positioning base plate 1 is fixedly installed with a first motor 2 that can be driven. The output end of the first motor 2 and the mounting sleeve 3 are transmission-connected together. The upper side wall surface of the horizontal end of the positioning base plate 1 is rotatably installed with a mounting sleeve 3 that can be limited. The interior of the mounting sleeve 3 is movably installed with a connecting shift rod 4 that can be limited. The bottom wall surface of the cavity of the mounting sleeve 3 is fixed with a hydraulic push rod 8. The displacement of the hydraulic push rod 8 The moving end is fixedly mounted on the bottom wall of the connecting moving rod 4, and a horizontally arranged fixing frame 5 is fixedly mounted on the outer wall of the connecting moving rod 4. A lifting mechanism that can be raised and lowered is provided on the fixing frame 5. The lifting mechanism includes a lifting wire 6, a lifting hook 7 and a winding wheel 14. The lifting hook 7 is fixedly mounted on the lower side wall of the lifting wire 6. The lifting hook 7 can be connected to the lifting ring on the sealing cover of the main pressure regulating valve. The outer wall of the lifting wire 6 away from the lifting hook 7 is wrapped around the outer wall of the winding wheel 14, and the winding wheel 14 is provided with a driving mechanism for rotating it.

[0022] During use of the utility model, the device can be pre-fixed on the outer wall of the main pressure-regulating valve. When the sealing cover on the main pressure-regulating valve needs to be removed, the movable end of the hydraulic push rod 8 moves upward, the connecting shift rod 4 starts to move upward, the fixing frame 5 moves upward, and the lifting wire 6 and the lifting hook 7 lift the sealing cover until the hydraulic push rod 8 is extended to the maximum position. Then, the first motor 2 is turned on to rotate the mounting sleeve 3 in the horizontal direction until the sealing cover is away from the main pressure-regulating valve. At this time, the driving mechanism is used to rotate the winding wheel 14 in the forward direction to release the lifting wire 6 wrapped around its outer wall, and the sealing cover moves downward until it contacts the ground.

[0023] Example 2: Based on Example 1, Figure 2 and Figure 3 As shown, a fixing plate 9 arranged in a horizontal state is fixedly installed on the rear outer wall of the mounting sleeve 3, and a connecting slide rod 10 arranged in a vertical state is fixedly installed on the upper side wall of the fixing plate 9. The outer wall of the connecting slide rod 10 movably passes through the upper and lower walls of the fixing frame 5.

[0024] A fixed connecting plate 11 is fixedly installed on the outer wall of the lifting wire 6. The fixed connecting plate 11 is arranged in a horizontal state. The outer wall of the fixed plate 9 movably penetrates the upper and lower wall surfaces of the fixed connecting plate 11.

[0025] The driving mechanism includes two sets of mounting plates 12 and a second motor 13 for driving. The two sets of mounting plates 12 are fixedly mounted on the upper side wall of the fixing frame 5 .

[0026] The second motor 13 is fixedly mounted on the front wall of the front mounting plate 12 , and the winding wheel 14 is disposed between the adjacent walls of the two sets of mounting plates 12 . The output end of the second motor 13 is drivingly connected to the winding wheel 14 .

[0027] The bottom wall of the fixing frame 5 is provided with a connecting groove 15 which passes through the upper and lower walls thereof. The outer wall of the lifting wire 6 is movable through the interior of the connecting groove 15 . Two sets of limiting rollers 16 are rotatably installed inside the connecting groove 15 .

[0028] The outer wall of the lifting wire 6 moves through the position between the two sets of limiting rollers 16, and the two sets of limiting rollers 16 are both arranged in a horizontal state.

[0029] During use of the utility model, by opening the mounting plate 12, the winding wheel 14 is rotated, and the lifting wire 6 passes through the position between the two sets of limiting rollers 16 during movement. Since the two sets of limiting rollers 16 are rotatably installed, the wear between the lifting wire 6 and the connecting groove 15 can be reduced, and its service life can be extended. In addition, during the movement of the lifting wire 6, the fixed connecting plate 11 will follow the lifting wire 6 along the outer wall of the connecting slide rod 10. Since the distance between the fixed connecting plate 11 and the lifting hook 7 is fixed, the length of the lifting wire 6 between the fixed connecting plate 11 and the lifting hook 7 is certain, so that the swing amplitude of the lifting wire 6 is within a certain range and its swing amplitude will not increase with the elongation of the limiting roller 16.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A maintenance device for a main pressure regulating valve of a hydropower station speed regulator, comprising a positioning base plate (1), the positioning base plate (1) being T-shaped, characterized in that: A first motor (2) capable of driving is fixedly mounted on the lower side wall surface of the horizontal end of the positioning base plate (1); the output end of the first motor (2) and the mounting sleeve (3) are transmission-connected together; a mounting sleeve (3) capable of limiting position is rotatably mounted on the upper side wall surface of the horizontal end of the positioning base plate (1); a connecting rod (4) capable of limiting position is movably mounted inside the mounting sleeve (3); a hydraulic push rod (8) is fixedly mounted on the bottom wall surface of the cavity of the mounting sleeve (3); and the movable end of the hydraulic push rod (8) is fixedly mounted on the connecting rod. On the bottom wall of (4), a fixed frame (5) is fixedly installed on the outer wall of the connecting moving rod (4) and is arranged in a horizontal state. The fixed frame (5) is provided with a lifting mechanism that can be raised and lowered. The lifting mechanism includes a lifting wire (6), a lifting hook (7) and a winding wheel (14). The lifting hook (7) is fixedly installed on the lower side wall of the lifting wire (6). The outer wall of the lifting wire (6) away from the lifting hook (7) is wound around the outer wall of the winding wheel (14). The winding wheel (14) is provided with a driving mechanism for rotating it.

2. The hydropower station governor main pressure regulating valve maintenance equipment according to claim 1 is characterized by: A fixing plate (9) arranged in a horizontal state is fixedly installed on the rear outer wall of the mounting sleeve (3), a connecting slide rod (10) arranged in a vertical state is fixedly installed on the upper side wall of the fixing plate (9), and the outer wall of the connecting slide rod (10) movably penetrates the upper and lower walls of the fixing frame (5).

3. The hydropower station governor main pressure regulating valve maintenance equipment according to claim 2 is characterized by: A fixed connecting plate (11) is fixedly installed on the outer wall of the lifting wire (6), and the fixed connecting plate (11) is arranged in a horizontal state. The outer wall of the fixed plate (9) movably penetrates the upper and lower wall surfaces of the fixed connecting plate (11).

4. The hydropower station governor main pressure regulating valve maintenance equipment according to claim 1, characterized in that: The driving mechanism comprises two groups of mounting plates (12) and a second motor (13) for driving. The two groups of mounting plates (12) are fixedly mounted on the upper side wall surface of the fixing frame (5).

5. The hydropower station governor main pressure regulating valve maintenance equipment according to claim 4 is characterized in that: The second motor (13) is fixedly mounted on the front wall of the front mounting plate (12), the winding wheel (14) is arranged between the adjacent walls of the two sets of mounting plates (12), and the output end of the second motor (13) is transmission-connected to the winding wheel (14).

6. The hydropower station governor main pressure regulating valve maintenance equipment according to claim 1, characterized in that: The bottom wall of the fixing frame (5) is provided with a connecting groove (15) which passes through the upper and lower walls thereof. The outer wall of the lifting wire (6) is movable through the interior of the connecting groove (15). Two sets of limiting rollers (16) are rotatably installed inside the connecting groove (15).

7. The hydropower station governor main pressure regulating valve maintenance equipment according to claim 6, characterized in that: The outer wall of the lifting wire (6) moves through the position between the two groups of limiting rollers (16), and the two groups of limiting rollers (16) are both arranged in a horizontal state.

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