Special tool for overhauling speed regulator of large water-turbine generator set

Abstract

The special tool comprises a plurality of stand columns detachably connected to the top of an oil collecting groove of the speed regulator, the bottoms of the stand columns are detachably connected with fixed lifting lugs on the top of the oil collecting groove of the speed regulator, and the tops of the stand columns are detachably connected with two symmetrical cross beams. The device comprises two cross beams, sliding grooves are formed in the opposite inner sides of the two cross beams, the two sets of sliding grooves are matched with each other and connected with a hoisting assembly in a sliding mode, the two ends of each cross beam extend towards the side face of an oil collecting groove of the speed regulator, and ground stand columns are detachably connected to the bottoms of the two ends of each cross beam. The special tool for overhauling the speed regulator can meet the requirements of an operation site, is safer and more efficient, can be designed on speed regulators of different types of units according to the requirements, has certain requirements in unit overhauling of various large power stations, and is large in application and popularization range.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine maintenance, in particular to a special tool for maintenance of a speed governor of a large water turbine generator set. Background Art

[0002] The special tooling for speed governor maintenance is an important special facility for the maintenance of hydro-turbine generator sets. It is installed above the oil collecting tank of the speed governor to ensure the safety and smooth deployment of the valve group and pipeline on the speed governor during the disassembly and assembly process. The speed governor of a large hydro-turbine generator set is an important core equipment of the hydro-turbine generator set. The valve group and pipeline of the speed governor of the hydro-turbine generator set have certain safety hazards in the past during the disassembly and assembly process. During the maintenance process of the unit speed governor, the ball valve of the main oil supply pipeline of the speed governor is heavy (about 0.35t) and is located above the oil collecting tank (height 4.5 meters). According to the on-site operating environment, a large gantry crane cannot be put into use normally for operation, because at least one lifting point directly above the component is required to lift the component during operation. In order to eliminate safety hazards and standardize the operation site, a speed governor is specially designed and manufactured. Special tooling is used to coordinate maintenance operations on site. The existing operating methods are mainly through setting up scaffolding and using the original roof to install sky anchors for operation. 1. Using sky anchors for operation: setting up steel wire ropes between multiple sky anchors to connect each other. The height of the sky anchor reaches 9 meters, which is still difficult to set up. The center of the lifting point is not easy to be centered, which easily causes crooked lifting and slanting, posing a great risk to safety. 2. Using scaffolding for operation: setting up scaffolding outside the speed regulator oil sump. The scaffolding setting range is (6 meters high, 12 meters long, and 5 meters wide). After the scaffolding is completed, the steel pipes on the scaffolding are used as lifting points to lift heavy objects. This method will cause damage and collapse of the scaffolding as a whole, which may cause damage to equipment and personnel. Utility Model Content

[0003] This utility model patent aims to solve the deficiencies in the existing technology and provide a special tool for repairing the governor of a large hydro-turbine generator set, so as to solve the technical problem of installation difficulties and safety hazards in the previous process of disassembling and assembling the governor valve group and pipelines.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a special tool for repairing a governor of a large hydro-turbine generator set, comprising a plurality of columns detachably connected to the top of the governor oil sump, the bottom of the columns being detachably connected to the fixed lifting ears at the top of the governor oil sump, the tops of the plurality of columns being detachably connected to two symmetrical cross beams, the two cross beams being provided with slide grooves on the relative inner sides, the two sets of slide grooves being slidably connected to a lifting assembly, the two ends of the cross beam extending toward the side of the governor oil sump, the bottoms of the two ends of the cross beam being detachably connected to ground columns, the sides of any cross beam being detachably connected to two symmetrical hanging beams, the hanging beams being perpendicular to the cross beams, the inner sides of the two hanging beams being provided with slide grooves, the two sets of slide grooves being cooperated with and installed with a lifting assembly, the hanging beam being fixed by supporting the bottom of one end of the cross beam away from the ground column.

[0005] Preferably, the hoisting assembly includes electric sliders respectively arranged in slide grooves and movably connected through slide rails. The two groups of symmetrical electric sliders are fixedly connected by a connecting rod, and a hand hoist is installed on the connecting rod.

[0006] Preferably, two suspension beams are detachably connected to the side of any crossbeam via threads.

[0007] Preferably, the top of the column is detachably connected to the crossbeam via bolts.

[0008] Preferably, cross bars are detachably connected between the uprights.

[0009] Preferably, oblique tie bars are installed between the columns and between the columns and the ground columns.

[0010] Preferably, a protective fence is provided around the top of the speed regulator oil sump.

[0011] Beneficial effects of the utility model:

[0012] The device of the utility model is made of 80 square steel and 60 angle steel, with a simple structure. The assembly design makes installation and disassembly easy to operate. The utility model can meet the needs of the work site and is safer and more efficient. At the same time, the special tooling for speed regulator maintenance can be designed on the speed regulators of different models of units as needed. All major power stations have certain needs in unit maintenance, and the use and promotion area is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0014] Figure 2 This is the second type of hanging beam connection diagram of the utility model;

[0015] Figure 3This is a diagram showing the connection between the fixing lugs and the column at the top of the oil sump of the speed governor of the present invention;

[0016] In the figure: 1. Speed ​​regulator oil collecting tank; 2. Column; 3. Crossbar; 4. Crossbeam; 5. Diagonal tie rod; 6. Connecting rod; 7. Hand chain hoist; 8. Ground column; 9. Lifting beam; 10. Protective fence; 11. Slide; 12. Electric slider; 111. Fixed lifting lug. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1As shown, a special tool for repairing a governor of a large hydro-generator set comprises a plurality of columns 2 detachably connected to the top of the governor oil collecting tank 1, the bottom of the columns 2 being detachably connected to the fixed lifting lug 111 on the top of the governor oil collecting tank 1, the tops of the plurality of columns 2 being detachably connected to two symmetrical beams 4, the two beams 4 being provided with chutes 11 on the opposite inner sides, the two sets of chutes 11 being slidably connected to a hoisting assembly with mutual cooperation, the two ends of the beam 4 extending toward the side of the governor oil collecting tank 1, the bottoms of the two ends of the beam 4 being detachably connected to the ground columns 8, and any of the beams 4 being detachably connected to the ground columns 8. Two symmetrical hanging beams 9 are detachably connected to the side, and the hanging beams 9 are perpendicular to the cross beams 4. A slide groove 11 is provided on the inner side of the two hanging beams 9, and a lifting component is installed in the two sets of slide grooves 11. The bottom of the end of the hanging beam 9 away from the cross beam 4 is supported and fixed by a ground column 8. In this embodiment, a number of columns 2 are installed on the top of the speed regulator oil sump 1. The columns are installed according to the size of the speed regulator oil sump 1 and are at least 4. In this embodiment, 6 are preferably installed. In the actual installation, a number of fixed lifting ears 111 are distributed along the edge of the top of the speed regulator oil sump 1. When installing, a number of columns 2 are arranged in groups of three by three. The bolts are detachably connected to the fixed lifting ears 111 on the top of the speed regulator oil collecting tank 1, and two cross beams 4 are installed on the top of the column 2 along the long side of the speed regulator oil collecting tank 1. The cross beam 4 is provided with a slide groove 11 for cooperating with the movement of the lifting assembly. When in use, if the surrounding environment permits, the ball valve and other components can be directly moved to the left and right wide ends of the speed regulator oil collecting tank 1 through the extended end of the cross beam 4, and then unloaded. However, in actual use, the installation environment of the speed regulator of large hydro-generator sets is relatively narrow, and there are many other equipment around, which limits the operation of large gantry cranes, sky anchors, etc. The installation of the lifting device, and the narrow environment also limits the take-off and landing points of the ball valve for disassembly and lifting; when other devices are installed on the left and right wide sides of the speed regulator oil sump 1 or there are buildings, which makes it impossible to unload from the left and right wide sides, ground columns 8 are set at the front and rear long sides of the speed regulator oil sump 1, and the two lifting beams 9 on the top of the ground columns 8 are perpendicular to the side of a certain beam 4 and are detachably connected by bolts. When in use, the ball valve and other heavy objects are lifted to the position corresponding to the lifting beam 9 by the lifting assembly located on the beam 4, and then the ball valve and other heavy objects are loaded and unloaded by the lifting assembly on the lifting beam 9.

[0019] Preferably, the hoisting assembly includes electric sliders 12 respectively arranged in the slide 11 and connected by slide rails. The two groups of symmetrical electric sliders 12 are fixedly connected by a connecting rod 6, and a hand hoist 7 is installed on the connecting rod 6. In this embodiment, the hoisting assembly includes an electric slider 12 that moves through the slide rail in the slide 11, and the electric sliders 12 on the two crossbeams 4 are fixedly connected by a connecting rod 6. A hand hoist 7 is installed at the center position of the connecting rod 6 through a fixed lifting point. When in use, the ball valve on the top of the speed regulator oil sump 1 is hoisted specifically by the hand hoist 7 on the crossbeam 4. If conditions permit, it can be directly slid It is transported to the side of the speed regulator oil collecting tank 1 and then unloaded. If the on-site conditions do not allow, the ball valve is transferred to the corresponding position of the lifting beam 9 by the hand hoist 7 on the crossbeam 4, and then hoisted by the hand hoist 7 on the lifting beam 9. The specific hand hoist 7 mainly lifts the material through the chain, so the ball valve located at the top of the speed regulator oil collecting tank 1 can be tilted for transfer, and then the ball valve is transported to an open space for unloading. At the same time, the electric slider 12 in this application can adopt an embedded slider 12, that is, a slide groove is opened on both sides of the lifting beam 9, and the electric slider is embedded in the slide groove 11 for sliding. This solution can make the slider more stable when moving.

[0020] Preferably, two suspension beams 9 are detachably connected to the side surface of any crossbeam 4 via threads. In this embodiment, threads are used to achieve detachable connection.

[0021] Preferably, the top of the column 2 is detachably connected to the beam 4 by bolts. In this embodiment, the columns 2, the beam 4, and the hanging beam are mostly assembled through threaded parts, which has a simple structure and is convenient for operators to carry and install.

[0022] Preferably, a cross bar 3 is detachably connected between the columns 2. In this embodiment, when facing a long speed regulator oil sump 1 structure during use, there may be a disadvantage of insufficient stability only through the connecting rod 6 between the columns 2, the crossbeam 4 and the electric slider. Therefore, a cross bar 3 is detachably installed between the columns 2 through threads to enhance stability. At the same time, the cross bar 3 can be installed in the direction close to the speed regulator oil sump 1. When the ball valve is lifted during use, the height of the ball valve is higher than the cross bar 3 to avoid obstacles. However, in order to further enhance the stability of the structure, the cross bar 3 can also be set at a higher position on the column 2 to further enhance stability. However, when lifting the ball valve, this solution needs to be disassembled when encountering a cross bar, and then lifted after the lifting component passes over the cross bar 3.

[0023] Preferably, oblique tie bars 5 are installed between the columns 2 and between the columns 2 and the ground columns 8. In this embodiment, the oblique tie bars 5 are detachably installed through threads on the side of the columns 2, that is, in a direction that does not affect the operation of the lifting components, to further enhance the stability of the overall structure.

[0024] Preferably, a protective fence 10 is provided around the top of the speed regulator oil sump 1. When in use, the protective fence is used to prevent the ball valve from falling and causing damage to on-site personnel and equipment.

[0025] The specific working method of this application: The special tooling for speed regulator maintenance is mainly installed above the oil collecting tank: When the speed regulator valve group and pipeline are hoisted, they are lifted by the hand hoist 7 installed above the speed regulator oil collecting tank 1, and then slide along the slide 11 through the electric slider 12. The hand hoist 7 can be moved to the position above the speed regulator oil collecting tank 1 as needed through the electric slider 12. If the hoisted parts need to be placed on the ground, they can be directly hoisted to the side of the speed regulator oil collecting tank 1 for unloading if the environment permits, or they can be transferred through the hoisting components on the lifting beam 9. The upper hand hoist 7 descends and the lower hand hoist 7 rises to form a docking. After the transfer components are in place, the upper hand hoist 7 must be completely detached. Only then can the lifting components below be moved and lifted until the components are transferred to the designated ground. The reverse operation can transfer the components on the ground to the oil collecting tank.

[0026] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A special tool for repairing the governor of a large hydro-generator set, characterized in that: The utility model comprises a plurality of columns (2) detachably connected to the top of the speed regulator oil collecting tank (1), the bottom of the columns (2) is detachably connected to the fixed lifting lug (111) on the top of the speed regulator oil collecting tank (1), the tops of the plurality of columns (2) are detachably connected to two symmetrical beams (4), the two beams (4) are provided with a slide groove (11) on the relative inner sides, the two groups of slide grooves (11) are slidably connected to a lifting assembly, the two ends of the beam (4) extend to the side of the speed regulator oil collecting tank (1), the bottoms of the two ends of the beam (4) are detachably connected to the ground columns (8), the side of any beam (4) is detachably connected to two symmetrical hanging beams (9), the hanging beams (9) are perpendicular to the beam (4), the inner sides of the two hanging beams (9) are provided with a slide groove (11), the two groups of slide grooves (11) are cooperated with to install a hanging assembly, and the bottom of one end of the hanging beam (9) away from the beam (4) is supported and fixed by the ground column (8).

2. The special tool for repairing a large hydro-generator governor according to claim 1 is characterized by: The hoisting assembly includes electric sliders (12) respectively arranged in the slide grooves (11) and movably connected through slide rails. The two groups of symmetrical electric sliders (12) are fixedly connected through a connecting rod (6), and a hand hoist (7) is installed on the connecting rod (6).

3. The special tool for repairing a large hydro-generator governor according to claim 1 is characterized by: Two suspension beams (9) are detachably connected to the side of any crossbeam (4) via threads.

4. The special tool for repairing a large hydro-generator governor according to claim 1 is characterized by: The top of the column (2) is detachably connected to the crossbeam (4) via bolts.

5. The special tool for repairing a large hydro-generator set speed governor according to claim 1, characterized in that: A crossbar (3) is detachably connected between the upright posts (2).

6. The tooling for overhauling a large hydro-generator governor according to claim 1 is characterized by: Diagonal tie bars (5) are installed between the columns (2) and between the columns (2) and the ground columns (8).

7. The special tool for repairing a large hydro-generator governor according to claim 1 is characterized by: A protective fence (10) is also provided around the top of the speed regulator oil collecting tank (1).

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