CN215592324U

CN215592324U - Special device for inversely installing coupling bolt stretcher of large hydroelectric generating set

Info

Publication number: CN215592324U
Application number: CN202120985894.XU
Authority: CN
Inventors: 刘攀; 罗前林; 陶吉全; 贾利涛; 廖祥波
Original assignee: China Yangtze Power Co Ltd
Current assignee: China Yangtze Power Co Ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-01-21
Anticipated expiration: 2031-05-10

Abstract

The utility model discloses a special device for inversely installing a coupling bolt stretcher of a large hydroelectric generating set, which comprises an upper supporting plate and a lower supporting plate; the upper supporting plate and the lower supporting plate are connected through a guide chain; when the device is used, the upper supporting plate is connected with the central air supplement pipe support, and the lower supporting plate lifts the stretcher to install the coupling bolt; the device has solved the required time limit for a project of prior art longer, maintenance cost is higher, the great problem of safe risk, has simple structure, convenient to use, can effectively guarantee the security to save the time limit for a project, improve work efficiency, and reduced the characteristics of the required cost of maintenance.

Description

Special device for inversely installing coupling bolt stretcher of large hydroelectric generating set

Technical Field

The utility model belongs to the technical field of maintenance of hydraulic generators, and particularly relates to a special device for reversely mounting a coupling bolt stretcher of a large hydraulic generator set.

Background

In a large-scale water turbine generator set, a coupling bolt of a runner and a water turbine shaft generally adopts an inverted mode, as shown in an attached drawing 3 in the specification, in the conventional bolt stretching work, a bolt installation and maintenance platform 8 is generally erected in the crown of the runner, and then a lifter is erected on the platform to support a hydraulic stretcher to stretch the coupling bolt. The existing coupling bolt stretching work has the following defects: 1. the overhaul period that occupies is longer, and work receives the restriction of space, safety control on the inner platform of upper crown, can only use a hydraulic pressure riser and hydraulic pressure elongator to carry out the bolt and stretch, and bolt pretension work generally divides many times, the symmetry is tensile, generally overhauls about the time limit for a period of 4 days. 2. The maintenance cost is higher, and to the maintenance of different models, the hydraulic lift of different heights should be customized. 3. The safety risk is high, the hydraulic stretcher is generally transferred to the lifter from the maintenance platform by manpower in the bolt stretching process, and the risk of smashing workers exists in the carrying process; therefore, a special device for inversely installing a coupling bolt tensioner of a large-sized water turbine generator set is needed to solve the problems.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a special device for inversely installing a coupling bolt stretcher of a large-scale hydroelectric generating set, solves the problems of long construction period, high overhaul cost and high safety risk in the prior art, and has the characteristics of simple structure, convenience in use, capability of effectively ensuring safety, saving construction period, improving working efficiency and reducing overhaul cost.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a special device for inversely installing a coupling bolt stretcher of a large hydroelectric generating set comprises an upper supporting plate and a lower supporting plate; the upper supporting plate and the lower supporting plate are connected through a guide chain.

Furthermore, the upper supporting plate and the lower supporting plate are made of channel steel, so that the cost is reduced while the strength is ensured.

Preferably, the lower surface of the upper supporting plate is connected with a supporting seat, and the supporting seat is connected with a central air supplement pipe support arranged on the inner wall of the water turbine shaft and the water turbine runner through bolts.

Preferably, the lower surface of the upper supporting plate is connected with a fixed pulley block, one end of the guide chain is matched with the fixed pulley block, and the other end of the guide chain is connected with the lower supporting plate.

Preferably, the lower supporting plate is a spliced multi-section plate-shaped structure; preferably, the structure is a three-section structure, and the sections are connected through bolts to form a detachable structure.

Preferably, the two ends of the upper surface of the lower support plate are connected with mounting plates, and the mounting plates are connected with the stretcher.

The utility model has the beneficial effects that:

1. the installation period is saved; compared with the prior art, the construction period of 4 days is spent, and the construction period of 1.5 days is generally required by using the device;

2. the capital cost is saved, the device main body can be manufactured by simple and easily-obtained materials such as channel steel, a guide chain and the like, the manufacturing is simple, and the cost is low;

3. compared with the prior art, need carry the stretcher many times, can injure staff's defect by a crashing object, the device is fixed through leading the chain in the use and suspends in midair, under the prerequisite of guaranteeing device intensity itself, can not have risks such as fall, the safety demand when effectively having guaranteed the operation.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural view of a turbine unit maintenance environment in which the present invention is applied;

the reference numbers in the figures are: go up backup pad 1, supporting seat 11, crown block group 12, bottom suspension fagging 2, mounting panel 21, guide chain 3, water turbine axle 4, runner 5, central air supplement pipe supports 6, elongator 7, bolt installation maintenance platform 8, coupling bolt 9.

Detailed Description

As shown in fig. 1 to 3, a special device for inversely installing a coupling bolt stretcher of a large hydroelectric generating set comprises an upper supporting plate 1 and a lower supporting plate 2; the upper supporting plate 1 and the lower supporting plate 2 are connected through a guide chain 3.

Further, go up

backup pad

1 and 2 all adopt the channel-section steel preparation of bottom suspension fagging, reduce the cost when guaranteeing intensity.

Preferably, the lower surface of the upper supporting plate 1 is connected with a supporting seat 11, and the supporting seat 11 is connected with a central air supplement pipe support 6 arranged on the inner wall of the water turbine shaft 4 and the water turbine runner 5 through bolts.

Preferably, the lower surface of the upper supporting plate 1 is connected with a fixed pulley block 12, one end of the guide chain 3 is matched with the fixed pulley block 12, and the other end of the guide chain is connected with the lower supporting plate 2.

Preferably, the lower support plate 2 is a spliced multi-section plate-shaped structure; preferably, the structure is a three-section structure, and the sections are connected through bolts to form a detachable structure.

Preferably, the mounting plates 21 are connected to both ends of the upper surface of the lower support plate 2, and the mounting plates 21 are connected to the stretcher 7.

The working principle of the special device for inversely installing the large hydroelectric generating set coupling bolt stretcher is as follows:

the central air supplement pipe support 6 is mainly used for fixing a large-axis central air supplement pipe of the unit; in a general installation process, before a coupling bolt of a rotating wheel 5 is removed, a large shaft air supply pipe is removed, and a lower connecting plate is not removed; before the connecting bolt of the rotating wheel 5 is installed, the large shaft air supply pipe is not installed, and the lower connecting plate is installed; thus, convenience is provided for assembling and disassembling the coupling bolt of the runner 5; therefore, under the precondition, when the device is used, an upper support plate 1 of the device is fixed on a central air supplement pipe support 6 through bolts, and the hydraulic stretcher is placed on the mounting plates 21 at two ends of a lower support plate 2 of the tool; firstly, a worker stands on a bolt installation and maintenance platform 8, and pulls a guide chain 3 of a device to enable a stretcher to move upwards so as to stretch bolts; after the installation of one group of bolts is finished, a worker pulls the guide chain 3 to enable the stretcher to move downwards, and then the lower support plate 2 of the rotating device is lifted again to carry out stretching work on the next group of bolts.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.

Claims

1. The utility model provides a large-scale hydroelectric set shaft coupling bolt elongator flip-chip isolated plant which characterized in that: comprises an upper supporting plate (1) and a lower supporting plate (2); the upper supporting plate (1) and the lower supporting plate (2) are connected through a guide chain (3).

2. The special device for inversely installing the large-scale hydroelectric generating set coupling bolt stretcher according to claim 1, which is characterized in that: go up backup pad (1) lower surface and be connected with supporting seat (11), supporting seat (11) pass through bolted connection with the central air supplement pipe support (6) of water turbine axle (4) and water turbine runner (5) inner wall installation.

3. The special device for inversely installing the large-scale hydroelectric generating set coupling bolt stretcher according to claim 1, which is characterized in that: the lower surface of the upper supporting plate (1) is connected with a fixed pulley block (12), one end of the guide chain (3) is matched with the fixed pulley block (12), and the other end of the guide chain is connected with the lower supporting plate (2).

4. The special device for inversely installing the large-scale hydroelectric generating set coupling bolt stretcher according to claim 1, which is characterized in that: the lower supporting plate (2) is of a spliced multi-section plate-shaped structure.

5. The special device for inversely installing the large-scale hydroelectric generating set coupling bolt stretcher according to claim 1, which is characterized in that: the two ends of the upper surface of the lower supporting plate (2) are connected with mounting plates (21), and the mounting plates (21) are connected with the stretcher (7).