Maintenance tool special for main distributing valve of speed regulator of hydropower station

Abstract

A special maintenance tool for a main distributing valve of a speed regulator of a hydropower station comprises a movable chassis, a hoisting system and a lifting system. The lifting system comprises a supporting base, the supporting base is fixed to the movable chassis, a rotating base is arranged at the upper end of the supporting base, a lifting stand column is fixed to the rotating base, a fixing rod is hinged to the upper end of the lifting stand column, and the fixing rod is driven by a first hydraulic cylinder to swing; a telescopic rod is arranged on the fixed rod in a sliding mode, and the telescopic rod is driven by a telescopic hydraulic cylinder to stretch out or retract relative to the fixed rod; the lifting system comprises a winch, the winch is installed on a winch support, the winch support is installed on the hoisting stand column, and a lifting rope of the winch is led out and bypasses reversing pulleys on the fixed rod and the telescopic rod; the end of the lifting rope is connected with the hook. The special maintenance tool for the main distributing valve of the speed regulator of the hydropower station can hoist the distributing valve conveniently and quickly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of main pressure regulating valve maintenance, especially a special maintenance tool for the main pressure regulating valve of the hydroelectric station governor. BACKGROUND

[0002] When the main pressure regulating valve of the hydroelectric station governor is maintained, the upper end cover of the main pressure regulating valve needs to be removed first, and then the piston and the bushing are taken out in turn. The main pressure regulating valve of the governor is connected with the opener cavity oil pipe, the closer cavity oil pipe and the main oil supply pipe, and has the space required for the movement and operation of the device. When the main pressure regulating valve is maintained, a scaffold is first erected, and then the worker stands on the scaffold to take out the upper end cover, the piston and the bushing of the main pressure regulating valve respectively. However, due to the heavy weight of the parts, the worker has difficulty in operation, and the efficiency is low. Therefore, a corresponding main pressure regulating valve maintenance tool is needed to lift the pressure regulating valve, and then the worker disassembles and maintains the pressure regulating valve. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a special maintenance tool for the main pressure regulating valve of the hydroelectric station governor, which is convenient for lifting and transporting and meets the needs of different main pressure regulating valve maintenance scenes.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme:

[0005] A special maintenance tool for the main pressure regulating valve of the hydroelectric station governor, comprising a mobile chassis, a hoisting system and a lifting system.

[0006] The hoisting system comprises a support base fixed on the mobile chassis, a rotating base installed on the support base, a hoisting column fixed on the rotating base, a fixed rod hinged to the upper end of the hoisting column and driven to swing by a first hydraulic cylinder; and an extension rod slidingly arranged on the fixed rod and driven to extend or retract relative to the fixed rod by an extension hydraulic cylinder.

[0007] The lifting system comprises a winch, and the lifting rope of the winch is led out and passes through the reversing pulleys on the fixed rod and the extension rod; and the end of the lifting rope is connected with a hook.

[0008] The mobile chassis comprises left and right side beams, the upper ends of the side beams are connected with a support plate and constitute an integral whole, directional wheels are installed at the tail ends of the two side beams, a control handle is rotatably installed at the front end of the support plate, and a steering wheel is installed at the lower end of the control handle.

[0009] Threaded holes are arranged at the outer end edges of the support legs, and the foot props are threadedly connected with the threaded holes on the support legs.

[0010] Threaded holes are arranged at the outer end edges of the support legs, and the foot props are threadedly connected with the threaded holes on the support legs.

[0011] The lower end of the accommodating groove is provided with an opening, and the bottom end of the supporting leg is provided with a supporting plate; when the supporting leg is located in the accommodating groove, the supporting leg is located in the opening and is screwed upward through the supporting plate.

[0012] The supporting plate and the side beam form a gap.

[0013] The winch is installed on a winch support, and the winch support is installed on a lifting column.

[0014] The utility model provides a kind of special maintenance tool for water power station governor main pressure regulating valve, with following technical effects:

[0015] 1), by moving chassis, it can be transported conveniently, by rotating base, the hoisted material can be moved horizontally, by winch and steel wire rope, the vertical movement of material can be realized, to meet the local small stroke hoisting and long distance large stroke hoisting of main maintenance equipment, to meet the needs of different inspection operation scenes.

[0016] 2), compared with the comparison file 1 "CN200820140504-movable dual-purpose lifting device", the difference of the present application is that hydraulic rod is used to drive telescopic rod, while the comparison file uses jack plug-spring latch structure telescopic / locking mode connection to lift the small arm of lifting boom, manual operation is needed after lifting arm is lowered, and the advantage based on the difference is that electric control is used, and operation is more convenient.

[0017] Compared with the comparison file 2 "CN201910933333-adjustable mobile lifting device", the difference point 1 of the present application is that winch is used to tighten and release steel wire rope, and the difference point 2 is that supporting leg is used to fix the device to carry out operation, while the comparison file uses manual capstan to tighten and release steel wire rope, and uses castor to fix the device to carry out operation, there is a safety hazard that the device shakes after lifting, which causes harm to operating personnel, and the advantage based on the difference is that the efficiency is higher after the present application uses winch, and the supporting leg fixing is more stable and safe than locking wheel.

[0018] Compared with the comparison file 3 "CN202223153821-mobile lifting device", the difference point 1 of the present application is that hydraulic rod is used to drive telescopic rod, the difference point 2 is that rotating base is used, and the difference point 3 is that supporting leg is used to fix the device to carry out operation, while the comparison file uses telescopic boom, the adjustment length is set according to fixed gear, fixed swing arm and column are used, the hoisted material cannot be moved left and right, four fixed pulleys and two universal wheels are used, if the material is moved left and right, the device needs to be pushed to move, the device cannot be fixed at operation position, and there is a safety hazard in lifting operation, and the advantage based on the difference is that the operation range is larger after the present application uses hydraulic rod to drive telescopic rod and rotating base, the operation position can be continuously changed, supporting leg is used to stabilize the equipment to carry out operation, and it is more safe. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is a schematic diagram of the installation structure of this utility model.

[0021] In the diagram: mobile chassis 1, side beam 101, directional wheel 102, support plate 103, outrigger 104; control handle 105, storage slot 106, foot support 107, lifting system 2, support base 201, rotating base 202, first hydraulic cylinder 203, lifting column 204, telescopic rod 205; telescopic hydraulic cylinder 206, fixed rod 207, lifting system 3, reversing pulley 301; hoisting rope 302, hook 303, winch 304, winch bracket 305, drive control box 4. Detailed Implementation

[0022] like Figure 1 As shown, a special maintenance tool for the main pressure distribution valve of a hydropower station governor includes a mobile chassis 1, a lifting system 2, a hoisting system 4, and a drive control box 4. The lifting system 2 is installed on the upper part of the mobile chassis, and the drive control box 4 is also installed on the upper part of the mobile chassis. The hoisting system 3 is installed on the lifting system 2.

[0023] The mobile chassis 1 is formed by the fixed connection of two side beams 101 and support plate 103 (steel plate). In order to avoid the inability to view the ground condition when the device moves in the direction of the directional wheel, the support plate 103 is not fully covered by the side beams (forming a gap), and an inspection port for the directional wheel 102 is left to facilitate the maintenance and replacement of the directional wheel 102.

[0024] A directional wheel 102 is installed at the rear of the side beam 101. Storage slots 106 are formed on both sides of the side beam 101. Support legs 104 are hinged within the storage slots 106. The support legs 104 can extend outwards from the storage slots 106 and rotate inwards to return to the storage slots 106. A foot support 107 is threaded onto the support leg 104. The foot support 107 can rotate up and down within the threaded holes of the support leg 104. A support plate is fixed to the bottom end of the foot support 107. An opening is provided on the side beam 101 at the lower end of the corresponding storage slot 106. When the support leg 104 returns to the storage slot 106, the foot support 107 is located within the opening, and the support plate of the foot support 107 is located below the opening. Rotating the foot support 107 upwards causes the support plate of the foot support 107 to rub against and lock against the end face of the opening, thus ensuring that the support leg 104 remains within the storage slot 106, maintaining a stable storage state.

[0025] The mobile chassis 1 is rotatably mounted with a control handle 105 at the front. A steering wheel is mounted at the lower end of the control handle 105. The steering wheel and the directional wheel 102 together facilitate the movement of the mobile chassis 1 and also allow the mobile chassis 1 to be turned.

[0026] The lifting system 2 comprises a support base 201 fixedly connected with the support plate 103 of the mobile chassis 1, a rotating base 202 bearing connected with the support base 201, and the rotating base 202 can rotate relative to the support base 201, and the rotating base 202 is driven to rotate by an internal motor.

[0027] The lifting column 204 is fixedly connected with the rotating base 202, the fixed rod 207 is hingedly connected with the lifting column 204, the lifting column 204 is provided with a winch support 305 on the side surface, the winch support 305 is fixedly connected with a winch 304, and the first hydraulic cylinder 203 is hingedly connected with the lifting column 204 and the fixed rod 207 at both ends, respectively. The first hydraulic cylinder 203 is driven to extend and retract, so as to drive the fixed rod 207 to swing upward or downward. The telescopic rod 205 is slidably sleeved with the fixed rod 207, and the telescopic hydraulic cylinder 206 is mounted on the fixed rod 207 and the telescopic rod 205 at both ends, respectively. When the telescopic hydraulic cylinder 206 extends, the telescopic rod 205 is driven to slide and extend relative to the fixed rod 207; when the telescopic hydraulic cylinder 206 retracts, the telescopic rod 205 is driven to slide and retract relative to the fixed rod 207, so as to adjust the length of the upper part of the lifting system 2.

[0028] The lifting system 3 comprises a reversing pulley 301 mounted on the end hole of the telescopic rod 205 through a shaft, a hook 303 fixedly connected with the end of a lifting rope 302 (steel wire rope), the lifting rope 302 is wound around the reversing pulley 301 and the other end is connected to the winch 304, and the winch 304 is mounted on the winch support 305.

[0029] The drive control box 4 is internally provided with a hydraulic pump, a hydraulic oil tank and the like for driving the first hydraulic cylinder 203 and the telescopic hydraulic cylinder 206, and is connected with the corresponding hydraulic cylinders outside through an oil path provided with a reversing valve, a throttle valve and the like; in addition, a hydraulic cylinder control box, a winch control box, a mobile power supply, control buttons and the like are further provided. The drive control box 4 is used to drive and control the lifting system 2 and the lifting system 3.

[0030] Working principle and process:

[0031] Step 1, the device is dragged to the work site by operating the control handle 105, the support leg 104 is opened, the foot support 107 is lowered, and the special maintenance tool for the speed regulator main pressure regulating valve of the hydropower station is fixed.

[0032] Step 2, the drive control box 4 of the maintenance tool is powered on, the direction control rod is operated, the hook 303 is adjusted in the front, back, left and right directions, the lifting control rod is operated, and the height of the hook 303 is adjusted to the lifting position for the maintenance of the main pressure regulating valve.

[0033] Step3, the hook 303 hoists the disassembled main pressure regulating valve upper end cover, piston, bushing and other equipment, operates the lifting rod, and lifts the disassembled upper end cover, piston, bushing and the like.

[0034] Step4, the direction control lever is operated, the rotating base 202 is rotated, the equipment is rotated to above the preset site.

[0035] Step5, the lifting control lever is operated, the equipment is lowered, the hook 303 is retrieved, and the hoisting of the next piece of equipment is performed.

[0036] Step6, the main pressure regulating valve upper end cover, piston, bushing and other equipment are reassembled, and steps 3-5 are operated.

[0037] Step7, after the maintenance is completed, the drive control box 4 of the maintenance tool is powered off, the foot prop 107 is raised, the supporting leg 104 is stored, the lifting rope 302 is tightened, the hydraulic rod is retracted, and the maintenance tool is dragged to a placement point.

Claims

1. A special maintenance tool for a main pressure regulating valve of a hydroelectric power station governor, characterized in that: It comprises a mobile chassis (1), a hoisting system (2) and a lifting system (3). The hoisting system (2) comprises a support base (201) fixed on the mobile chassis (1), a rotating base (202) installed on the support base (201), a hoisting column (204) fixed on the rotating base (202), a fixed rod (207) hingedly connected to the upper end of the hoisting column (204), and a telescopic rod (205) slidably arranged on the fixed rod (207) and driven by a telescopic hydraulic cylinder (206) to extend or retract relative to the fixed rod (207). The lifting system (3) comprises a winch (304), and a lifting rope (302) of the winch (304) is led out and passes through a reversing pulley (301) on the fixed rod (207) and the telescopic rod (205).

2. The special maintenance tool for the main governing valve of the hydroelectric power station governor according to claim 1, characterized in that: The mobile chassis (1) comprises left and right side beams (101) connected to a support plate (103) at the upper ends and forming an integral whole, and directional wheels (102) are installed at the tail ends of the side beams (101).

3. The special maintenance tool for the main governing valve of the hydroelectric power station governor according to claim 2, characterized in that: Each of the side beams (101) is provided with a receiving groove (106) on the side surface, and a supporting leg (104) is hingedly connected in each receiving groove (106).

4. The special maintenance tool for the main governing valve of the hydroelectric power station governor according to claim 3, characterized in that: The outer end edge of the supporting leg (104) is provided with a threaded hole, and a foot support (107) is threadedly connected to the threaded hole of the supporting leg (104).

5. The special maintenance tool for the main governing valve of a hydroelectric power station governor according to claim 4, characterized in that: The lower end of the receiving groove (106) is provided with an opening, and the bottom end of the corresponding foot support (107) is provided with a support plate.

6. The special maintenance tool for the main governing valve of a hydroelectric power station governor according to claim 2, characterized in that: When the supporting leg (104) is located in the receiving groove (106), the foot support (107) is located in the opening and is screwed upward through the support plate below.

7. The special maintenance tool for the main governing valve of a hydroelectric power station speed regulator according to claim 1, characterized in that: A gap is formed between the support plate (103) and the side beams (101). The winch (304) is installed on a winch support (305), and the winch support (305) is installed on the hoisting column (204).

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