A device for disassembling and assembling the coupling bolts of a turbine runner

Abstract

The utility model provides a device for disassembling and assembling the coupling bolts of a turbine runner, including two hydraulic tensioners, a bracket, a tray, a lifting lug and a balancer. The bracket is formed by a plurality of connecting plates and vertical plates fixedly connected. The tray is horizontally arranged and rotatably mounted on both ends of the bracket. The edge of the tray is provided with a notch. The hydraulic tensioners are placed on the tray respectively. The notch is used to clamp the oil nozzle of the hydraulic tensioner and serve as an oil pipe connection channel. Two lifting lugs are provided and fixedly mounted in the middle of the bracket. The balancer includes a support plate, a screw and two counterweight wheels. The support plate is symmetrically fixed to the bottom of the bracket. The screw is fixed to the support plate and vertically arranged with the support plate. The two counterweight wheels are threadedly connected to both ends of the screw. Using a special bracket, there is no need to manually lift the hydraulic tensioner, which reduces the workload of people and reduces the labor intensity. The device is equipped with a rotating bearing, which greatly reduces the difficulty of screwing the tensioner into the screw.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembly and assembly tools, in particular to a device for disassembling and assembling coupling bolts of a turbine runner. Background Art

[0002] The existing method of disassembling and assembling the coupling bolts of the turbine mainly involves sending the hydraulic tensioner into the center body of the runner by manpower or a hand winch, then screwing it into the coupling bolt thread, and separating the nut from the flange surface by pressing with an oil pump to loosen or tighten the bolt. Its disadvantages are: 1. The hydraulic tensioner is very heavy, and the handling process is labor-intensive; 2. It is difficult to ensure the level of the hydraulic tensioner by manpower, and it is difficult to screw it into the screw thread, which is very difficult to operate; 3. The hydraulic tensioner needs to be screwed into the thread from bottom to top, and there is a risk of falling during this process, which poses a safety hazard; 4. The runner coupling bolts need to be tightened symmetrically, and two groups work at the same time, and the operating space in the runner body is very narrow. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a device for disassembling and assembling a turbine runner coupling bolt. In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0004] A device for disassembling and assembling the coupling bolts of a turbine runner comprises two hydraulic tensioners, a bracket, a tray, a lifting lug and a balancer, wherein the bracket is formed by a plurality of connecting plates and vertical plates being fixedly connected, the tray is horizontally arranged and rotatably mounted on the two ends of the bracket, the edge of the tray is provided with notches, the hydraulic tensioners are respectively placed on the trays, the notches are used to clamp the oil nozzles of the hydraulic tensioners and serve as oil pipe connection channels, two lifting lugs are provided and fixedly mounted in the middle of the bracket, the balancer comprises a support plate, a screw and two counterweight wheels, the support plate is symmetrically fixed to the bottom of the bracket, the screw is fixed to the support plate and is vertically arranged to the support plate, and the two counterweight wheels are threadedly connected to the two ends of the screw.

[0005] Furthermore, the lifting ear is threadedly connected to the bracket, and a nut is threadedly connected to the lifting ear.

[0006] Furthermore, a locking nut is provided on the outer side of the counterweight wheel, and the locking nut is threadedly connected to the screw rod.

[0007] Furthermore, two ends of the bracket are respectively fixedly connected with plane bearings, and the tray is fixed on the plane bearings by hexagon socket bolts.

[0008] Furthermore, the edge of the tray is evenly fixedly connected with a limit screw, and the limit screw is located at the edge of the hydraulic stretcher.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] 1. Use a special bracket, no need to manually lift the hydraulic tensioner, reduce the workload of people, and reduce labor intensity;

[0011] 2. Using two lifting eyes and two counterweight wheels of the balancer makes it easier to ensure the level during lifting and prevent equipment damage;

[0012] 3. Using special tools for bridge crane lifting, there is no need for people to work directly under the nut and hydraulic tensioner, ensuring the safety of construction;

[0013] 4. Using the pallet to rotate the hydraulic tensioner to cooperate with the screw greatly reduces the difficulty of screwing the tensioner into the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the top view of the structure of an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the cutaway structure of a tray according to an embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the working state structure of an embodiment of the utility model.

[0019] In the above drawings: bracket 1, tray 2, lifting ear 3, support plate 4, screw 5, counterweight wheel 6, tensioner 7, plane bearing 8, hexagon socket bolt 9, notch 10, limit screw 11, positioning nut 12, locking nut 13, runner center body 14, turbine main shaft 15, wire rope 16, coupling bolt 17, coupling flange 18. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] like Figures 1 to 4As shown, the embodiment of the utility model proposes a device for disassembling and assembling the coupling bolts of a turbine runner, including two hydraulic tensioners 7, and also including a bracket 1, a tray 2, a lifting lug 3 and a balancer. The bracket 1 is formed by a plurality of connecting plates and vertical plates fixedly connected, the tray 2 is horizontally arranged and rotatably mounted on both ends of the bracket 1, and the edge of the tray 2 is provided with a notch 10. The hydraulic tensioners 7 are respectively placed on the tray 2, and the notch 10 is used to clamp the oil nozzle of the hydraulic tensioner 7 and serve as an oil pipe connection channel. The lifting lug 3 is provided with two and fixedly mounted in the middle of the bracket 1. The balancer includes a support plate 4, a screw 5 and two counterweight wheels 6. The support plate 4 is symmetrically fixed to the bottom of the bracket 1, the screw 5 is fixed on the support plate 4 and is vertically arranged with the support plate 4, and the two counterweight wheels 6 are threadedly connected to both ends of the screw 5.

[0022] When in use, first tilt the bracket 1 from the opening at the bottom of the runner center body 14 into the internal space of the runner center body 14, use the bridge crane in the power plant building to lift the wire rope 16 from the turbine main shaft 15 and cooperate with the two lifting ears 3 to lift the bracket 1, rotate the two counterweight wheels 6 to adjust the balance of the bracket 1, and when the bracket 1 is lifted and adjusted to the level in the runner center body 14, use a hand winch to send the hydraulic tensioner 7 to the tray 2, lift the bridge crane until the tensioner 7 is flush with the screw 5 in the coupling bolt 17, screw the tensioner 7 into the coupling bolt 17 thread by rotating the tray 2, connect the hydraulic oil pump through the tensioner 7 to pressurize the nut of the coupling bolt 17 to separate from the flange surface, complete the removal or tightening of the coupling bolt 17, and finally remove or tighten the coupling flange 18.

[0023] In this embodiment, if Figure 1 , Figure 2 As shown, the ear 3 is threadedly connected to the bracket 1, and a positioning nut 12 is threadedly connected to the ear 3. The threaded ear 3 is convenient for adjusting the height of each ear 3, and then the bracket 1 is pressed with the positioning nut 12 to fix the ear 3, so as to adjust the level of the bracket 1.

[0024] In this embodiment, if Figure 1 , Figure 2 As shown, a locking nut 13 is provided on the outer side of the counterweight wheel 6, and the locking nut 13 is threadedly connected to the screw rod 5. After the counterweight wheel 6 is rotated to adjust the balance, the locking nut 13 is locked on both sides of the counterweight wheel 6 to fix the counterweight wheel 6, so that the bracket 1 can maintain balance.

[0025] In this embodiment, if Figure 3 As shown, the two ends of the bracket 1 are respectively fixedly connected with plane bearings 8, and the tray 2 is fixed on the plane bearings 8 by hexagon socket bolts 9. It is convenient to install and replace the damaged and deformed tray 2.

[0026] In this embodiment, if Figure 1 As shown, the edge of the tray 2 is evenly fixedly connected with the limit screw 11, and the limit screw 11 is located at the edge of the hydraulic tensioner 7. Six limit screws 11 are arranged on the tray 2 to effectively prevent the tensioner 7 from accidentally sliding out of the tray 2.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A device for disassembling and assembling the coupling bolts of a turbine runner, comprising two hydraulic tensioners, characterized in that: It also includes a bracket, a tray, a lifting lug and a balancer. The bracket is formed by a plurality of connecting plates and vertical plates fixedly connected. The tray is horizontally arranged and rotatably installed at both ends of the bracket. The edge of the tray is provided with notches. The hydraulic tensioners are placed on the trays respectively. The notches are used to clamp the oil nozzles of the hydraulic tensioners and serve as oil pipe connection channels. Two lifting lugs are provided and fixedly installed in the middle of the bracket. The balancer includes a support plate, a screw and two counterweight wheels. The support plate is symmetrically fixed to the bottom of the bracket. The screw is fixed to the support plate and vertically arranged to the support plate. The two counterweight wheels are threadedly connected to both ends of the screw.

2. A device for disassembling and assembling a turbine runner coupling bolt according to claim 1, characterized in that: The lifting ear is threadedly connected to the bracket, and a positioning nut is threadedly connected to the lifting ear.

3. The device for disassembling and assembling the coupling bolts of a water turbine runner according to claim 1, characterized in that: A locking nut is arranged on the outer side of the counterweight wheel, and the locking nut is threadedly connected to the screw rod.

4. A device for disassembling and assembling a turbine runner coupling bolt according to claim 1, characterized in that: Two ends of the bracket are respectively fixedly connected with plane bearings, and the tray is fixed on the plane bearings by hexagon socket bolts.

5. The device for disassembling and assembling the coupling bolts of a water turbine runner according to claim 1, characterized in that: The edge of the tray is evenly fixedly connected with a limit screw, and the limit screw is located at the edge of the hydraulic stretcher.

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