JPH0723032Y2 - Thyristor valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a thyristor valve in which the strength of an insulating support of a thyristor valve is improved and the insulation distance (creeping surface) between modules is increased.

(Prior Art) FIG. 3 is a configuration diagram of a thyristor valve 10, and FIG. 2 is a view showing details of a mounting portion of a conventional thyristor valve on a flange of an insulating column. In the figure, 1 is an insulating pillar for insulating the upper and lower parts of the module, 2 is a flange for mounting the insulating pillar, 4, 5 and 6 are frames for forming a frame of the thyristor valve 10, 7 is a thyristor module, and 8 is insulating. Prop 1
And the connection portion of the flange 2 and 9 is the height of the thread portion of the flange.

In the thyristor valve 10, the frames 4, 5 and 6 and the insulating support 1 constitute a frame of the thyristor valve 10. During this time, the thyristor module 7 is fixed to the insulating column 1 by a fixing mechanism (not shown) to maintain insulation between the upper and lower parts of the thyristor module 7. The insulating column 1 has a steel flange 2 screwed into both ends of the column body.

Vibration resistance and insulation performance are important points when designing the thyristor valve 10. When the thyristor valve 10 is horizontally vibrated, the largest bending moment is generated at the connecting portion 8 between the conventional insulating support column 1 and the flange 2 shown in FIG.

In this case, as described above, since the insulating pillar 1 is threaded, there is a drawback that the bending stress is extremely lower than the bending stress of the material of the insulating pillar 1.

Therefore, conventionally, the flange 2 that is screwed into the insulating column 1 is used.
The height of the screw portion 9 was increased and the size of the insulating column 1 was increased to improve the strength.

On the other hand, when the threaded portion height 9 of the flange 2 is increased, the flange 2 is attached to both ends of the insulating support column 1.
Thyristor module 7 increases as the screw height 9 increases.
The insulation distance between the top and bottom of is small.

(Problems to be solved by the invention) With such a conventional measure, the cost of the insulating column 1 increases, the insulation distance (creep distance) between the upper and lower sides of the thyristor module 7 decreases, and the thyristor valve 10 becomes larger. There was a problem such as.

An object of the present invention is to improve the strength of an insulating support column and increase the vertical insulation distance (creeping distance) of a thyristor module, and to downsize the thyristor valve.

[Means for Solving the Problems] (Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention fixes the upper and lower frames with a plurality of insulating columns having flanges screwed to both ends of the insulating columns. Also, in a thyristor valve constituted by insulatingly supporting a plurality of thyristor modules accommodating a thyristor element and a peripheral surface circuit thereof by the insulating support, a height of the flange is 2 to 3 times inside the end of the insulating support. The following is characterized in that an insulating reinforcing material having the same thickness as that of the insulating pillar is closely press-fitted.

(Operation) According to the present invention, since the insulating reinforcing material higher than the height of the flange is press-fitted inside the end portion of the insulating strut, the bending strength of the connection portion between the insulating strut and the flange is improved, and Since a low flange can be used, the insulation distance between the top and bottom of the thyristor module increases, and the thyristor valve can be made compact.

(Embodiment) An embodiment of the present invention will be described below with reference to FIG. The present invention, as shown in FIG.
6. In the thyristor valve 10 composed of the module 7, the reinforcing material 3 made of an insulating material having a height higher than the height 9 of the flange 2 is press-fitted inside the insulating support column 1.

With this configuration, the flange 2 having a low height is
Can be used, the insulation distance between the upper and lower parts of the thyristor module 7 increases, and the thyristor valve 10 can be made compact. Since the reinforcing material 3 is press-fitted into the insulating column 1, the bending stress is prevented from concentrating on the connecting portion 8 between the insulating column 1 and the flange 2, and the screw shearing force is reduced and the bending strength is improved.

Here, the specific operational effects of the above-described embodiment will be described. When the size of the insulating column 1 and the outer shape of the flange 2 are arbitrarily set and the reinforcing member 3 is not provided, the bending strength of the connecting portion 8 between the insulating column 1 and the flange 2 and the case where the reinforcing member 3 is press-fitted Comparing the bending strengths, the former has a strength lower than that of the material properties by about 40%, while the latter has a strength almost equal to that of the material properties. However, the height of the reinforcing material 3 is
The case is the case where the flange screw portion height H × 2 times and the wall thickness are selected to be the same. If this value is set to H × 2 times or more, the bending strength can be slightly increased, but in consideration of economic effects such as material cost, the range of H × 2 to H × 3 is optimal.

[Effects of the Invention] As described above, according to the present invention, the following effects can be achieved.

(1) By press-fitting a reinforcing material made of an insulating material inside the insulating column, the bending stress concentration between the insulating column and the bulge portion can be dispersed to improve the bending strength.

(2) Since it can be used without increasing the size of the insulating column, the cost can be reduced.

(3) By keeping the height of the flange screw part low,
Insulation distance between top and bottom of thyristor module (creeping distance)
Can be increased.

[Brief description of drawings]

FIG. 1 is a detailed view of a connection portion of an insulating strut with a flange according to an embodiment of the present invention. (A) is a side sectional view, (B) is a plan view, and FIG. 2 is a conventional insulating strut flange. 3A is a side sectional view, FIG. 3B is a plan view, and FIG. 3 is a perspective view of a thyristor valve. 1 ... Insulating columns, 2 ... Flange, 3 ... Reinforcing material, 4,5,6 ... Frame, 7 ... Thyristor module, 8 ... Insulating column and flange connection, 9 ... Flange screw height, 10 ... Thyristor valve.

Claims (1)

[Scope of utility model registration request] 1. An upper and lower frame is fixed by a plurality of insulating struts having flanges screwed to both ends of the insulating struts, and the insulating struts insulate and support a plurality of thyristor modules accommodating thyristor elements and their peripheral circuits. In the thyristor valve configured as described above, an insulating reinforcing material having a thickness equal to or less than 2 to 3 times the height of the flange is closely fitted inside the end portion of the insulating strut. Thyristor valve.