JPH0137611B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a separating device for a flange joint in which two flange bodies are integrally connected.

A conventional flange joint C, for example, a flange joint C for a drive shaft of a rolling mill, as shown in FIGS. A spindle shaft 6 (not shown) is connected to the other flange main body 2, which is integrally connected to the other flange body 2 via a universal joint 5. Further, the pair of flange bodies 1 and 2 are integrally connected by inserting bolts 3 into bolt assembly holes 1b and 2b that pass through the opposing bolt attachment flanges 1a and 2a. Reference numeral 7 denotes a key, which is fitted into key-fitting grooves 8 and 9 which are vertically provided on the opposing surfaces of the flange bodies 1 and 2 on the diameter line of each body and at opposing positions.

By the way, such a conventional flange joint C,
In particular, a flange joint C in a drive shaft of a rolling mill has a pair of flange bodies 1 and 2 connected to a key 7.
The fitting interference between the grooves 8 and 9 for key insertion is large, and the bolts 3 are tightened with high tightening force.
When disassembling the flange joint C, simply removing the bolts 3 causes the flange bodies 1 and 2 to stick together due to oil film, etc., and cannot be easily separated in the axial direction. Conventionally, the flange bodies 1 and 2 are separated by driving a wedge into the mating surface of each bolt mounting flange 1a and 2a or by using a draw bolt, but when driving the wedge into the mating surface, Scratches, corner cracks, etc. will occur, and the flange surface will be damaged when using draw bolts, so when reusing each of the flange bodies 1 and 2, the scratches, cracks, and further damage to the flange surface should be corrected. It was very troublesome.

In order to solve the drawbacks of the conventional structure as described above and provide a separating device B for a flange joint C with good workability, the present invention provides a separating device B as described below between bolts 3 as shown in FIG. This is what was placed. The structure other than the separation device is completely the same as the conventional structure, so the part numbers are the same as in FIGS. 1 and 2.

Separation device B will be explained in detail. In FIG. 4, FIG. 5, and FIG. 6, U-shaped grooves 11a and 11 are located at opposing positions on the opposing surfaces of the flanges 1a and 2a for bolt attachment of the flange bodies 1 and 2 and radially outward.
b and bolt mounting flanges 1a, 2a.
A rectangular bottomed recess 11 is provided on the outer periphery of the recess 11, and a truncated square pyramid member 13 having a screw hole 16 in the center is placed in the recess 11. and each flange 1,
Axial side surfaces 11c, 1 of concave grooves 11a, 11b of 2
1d, an outer surface 13a of the truncated square pyramid member 13;
Wedges 14 and 15 having inclined inner surfaces 14a and 15a that come into contact with are respectively inserted. Furthermore, in order to fix the wedges 14, 15, a presser member 17 having a rectangular planar shape with a bolt insertion hole 17a formed in the center is placed on the wedges 14, 15, and the bolt 12 inserted through the bolt insertion hole 17a is placed on the wedge 14, 15. It is screwed into the screw hole 16 of the truncated square pyramid member 13.

Separation device B of the present invention has the above configuration,
When the bolt 12 is rotated in the direction of tightening it toward the bottom of the recess 11, the truncated square pyramid member 13 is attached to the wedge 1.
4 and 15, but since the wedges 14 and 15 are held down by the bolt head via the holding member 17, an axial component force acts on the wedges 14 and 15. . Therefore, when separating the flange bodies 1 and 2 in the axial direction, it is only necessary to remove the bolts 3 of the bolt mounting flanges 1a and 2a, and then rotate the bolts 12 in a direction to tighten them toward the bottom side of the recess 11. . In addition, when the flange bodies 1 and 2 are fastened and assembled again with bolts 3,
If the bolt 12 is slightly tightened toward the bottom of the recess 11, the outer surface of the truncated square pyramid member 13, the inner surface of the wedges 14 and 15, and the inner surface of the grooves 11a and 11b of the flange bodies 1 and 2 will be tightened slightly. Frictional force acts between the wall surface and the bolt 12 to prevent it from rotating.

Further, as shown in FIG. 3, the separation devices may be provided at two locations facing each other at 180 degrees, or may be provided in multiple locations at equal locations on the circumference.

If the key 7 for torque transmission is used, the flange joint C can be separated more easily if a separating device is provided near the key 7 at a position facing 180 degrees.

As described above, according to the flange joint C separation device B of the present invention, there are no scratches or cracks unlike the conventional ones, and the flange joint can be separated very easily.

[Brief explanation of drawings]

Fig. 1 is a half-longitudinal sectional view of the main part of a conventional flange joint, Fig. 2 is a sectional view taken along the line - - in Fig. 1, Fig. 3 is a view equivalent to Fig. 2 showing the position of the present invention, and Fig. 4 is a A vertical sectional view of main parts showing the installed state of this invention, No. 5
The figure is a cross-sectional view taken along the - line in Figure 4, and Figure 6 is Figure 4A.
It is a partial view of an arrow. 11... recess, 12... bolt, 13... truncated square pyramid member, 14, 15... wedge, 16... screw hole, 17... holding member.

Claims (1)

[Claims] 1 A pair of flange bodies equipped with fastening member mounting flanges are arranged on the left and right with the fastening member mounting flanges facing each other, and the fastening member is attached to the fastening member assembly portions provided on the opposing fastening member mounting flanges. In a flange joint formed by assembling and integrally connecting a pair of flange bodies, a U-shaped groove is formed on the opposing surface of each fastening member mounting flange at opposing positions and radially outward, so that the fastening member can be mounted. A rectangular bottomed recess is provided on the outer periphery of the flange for use, and a truncated square pyramid member having a screw hole in the center is placed in the recess, and on the axial side surface of the recessed groove of each flange,
A flange formed by inserting wedges each having an inclined inner surface that abuts the outer surface of the truncated quadrangular pyramidal member, and screwing a fastening member into a screw hole of the truncated quadrangular pyramidal member through a pressing member of the wedge. Joint separation device.