CN217292119U

CN217292119U - Special spanner for steam turbine coupling bolt

Info

Publication number: CN217292119U
Application number: CN202220407451.7U
Authority: CN
Inventors: 李南; 周其涛; 冷洪; 刘勇; 陈敬伟
Original assignee: Neijiang Power Plant Of Huadian Sichuan Power Generation Co ltd
Current assignee: Neijiang Power Plant Of Huadian Sichuan Power Generation Co ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-08-26
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a special spanner for a steam turbine coupling bolt, which comprises a handle and a cylindrical spanner head which are connected, wherein one end surface of the spanner head is fixedly provided with four uniformly distributed bosses; the wrench is characterized in that the handle is fixedly connected with the axial middle part of a cylinder of the wrench head, four uniformly distributed bosses are fixedly arranged on the other end surface of the wrench head, and the four bosses on the two end surfaces are arranged in a staggered way on the circumference; the handle is a curved handle. The utility model discloses can increase the dismantlement scope, convenient operation, and avoid frequently changing the spanner, can improve dismantlement efficiency.

Description

Special spanner for steam turbine coupling bolt

Technical Field

The utility model relates to a special spanner for steam turbine shaft coupling bolt.

Background

As shown in fig. 1 and 2, a nut 6 on a coupling bolt 5 of a steam turbine adopts a groove design, one end surface of the nut is provided with four grooves 7, and a special boss wrench which is consistent with the size of the grooves is required to be used for dismounting; the existing special spanner comprises a handle 8 and a cylindrical spanner head 9 which are connected, wherein four uniformly distributed bosses 10 are fixedly arranged on one end surface of the spanner head 9, and the handle 8 is a straight shank, as shown in fig. 3 and 4; when the special straight handle wrench is used for disassembly, the boss 10 of the straight handle wrench must be clamped into the groove of the nut; as shown in fig. 5, because the steam turbine coupling 11 has a large size and needs to be connected by a plurality of bolts 12, the angle positions of the grooves of the nuts 13 are uncertain and random, when the angle is not proper, the angle positions of the handles of the special wrench are not good and interfered by other bolts, the wrench has a small dismounting range and is inconvenient to operate, and the maintainers cannot hammer and knock; in addition, the turbine coupling 11 has high processing precision, so that the coupling is convenient to use in centering, the appearance of the coupling must be strictly protected, and the disassembly range of the wrench is further limited; the boss of adding special spanner is very easy wearing and tearing, dismantles several shaft coupling nuts 13 after, the boss fracture takes place easily, needs to change new spanner, influences the dismantlement efficiency.

Disclosure of Invention

The utility model aims at the above-mentioned not enough that prior art exists, provide a steam turbine shaft coupling bolt special spanner, it can increase dismantlement scope, convenient operation, and avoids frequently changing the spanner, can improve dismantlement efficiency.

In order to achieve the purpose, the special wrench for the steam turbine coupling bolt comprises a handle and a cylindrical wrench head which are connected, wherein four bosses which are uniformly distributed are fixedly arranged on one end surface of the wrench head; the wrench is characterized in that the handle is fixedly connected with the axial middle part of a cylinder of the wrench head, four uniformly distributed bosses are fixedly arranged on the other end surface of the wrench head, and the four bosses on the two end surfaces are arranged in a staggered way on the circumference; the handle is a bent handle;

when the nut is used, the disassembly range of the wrench can be enlarged by bending the handle, and the four bosses on the two end faces are arranged in a staggered manner on the circumference, so that the nut can be suitable for nut grooves with more angles, and the bosses on one end face can be used on the reverse side after being worn, thereby avoiding frequent replacement of the wrench, facilitating operation and improving the disassembly efficiency;

as a further improvement of the utility model, the bending handle is an arc bending handle; four bosses on two end surfaces are arranged at a position of 45 degrees on the circumference; the arc-shaped bending handle has a larger dismounting range, and four bosses on two end surfaces are arranged on the circumference in a staggered manner at 45 degrees, so that all the bosses are uniformly distributed on the circumference, and nut grooves with different angles are matched conveniently;

to sum up, the utility model discloses can increase the dismantlement scope, convenient operation, and avoid frequently changing the spanner, can improve dismantlement efficiency.

Drawings

FIG. 1 is a front view of a coupling bolt and nut on a steam turbine.

Fig. 2 is a top view of the nut of fig. 1.

Fig. 3 is a front view of a conventional straight shank special wrench.

Fig. 4 is a top view of fig. 3.

FIG. 5 is a layout view of the coupling bolts and nuts on the steam turbine.

Fig. 6 is a front view of an embodiment of the present invention.

Fig. 7 is a top view of fig. 6.

Fig. 8 is a bottom view of fig. 6.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 6 to 8, the wrench special for the steam turbine coupling bolt of the embodiment comprises a handle 1 and a cylindrical wrench head 2 which are connected, wherein the handle 1 is an arc-shaped bent handle; the handle 1 is fixedly connected with the axial middle part of a cylinder of the wrench head 2, one end surface of the wrench head 2 is fixedly provided with four uniformly distributed bosses 3, the other end surface of the wrench head 2 is fixedly provided with four uniformly distributed bosses 4, and the four

bosses

3 and 4 on the two end surfaces are arranged in a staggered way of 45 degrees on the circumference;

during the use, the crooked handle of arc 1 can increase the dismantlement scope of spanner, and four

bosss

3, 4 of both ends face are arranged 45 degrees on the circumference in dislocation for all bosss equipartition on the circumference do benefit to the nut recess that matches different angles, applicable in the nut recess that the angle is more, and

boss

3 or 4 wearing and tearing back on the terminal surface, but the reverse side is used, avoids frequently changing the spanner, and convenient operation can improve dismantlement efficiency.

Claims

1. A special spanner for a steam turbine coupling bolt comprises a handle and a cylindrical spanner head which are connected, wherein four bosses which are uniformly distributed are fixedly arranged on one end face of the spanner head; the wrench is characterized in that the handle is fixedly connected with the axial middle part of a cylinder of the wrench head, four uniformly distributed bosses are fixedly arranged on the other end surface of the wrench head, and the four bosses on the two end surfaces are arranged in a staggered way on the circumference; the handle is a curved handle.

2. The special wrench for a steam turbine coupling bolt of claim 1, wherein the curved handle is an arc-shaped curved handle; four bosses of two end faces are arranged on the circumference in a staggered way by 45 degrees.