JPH0214204Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in semiconductor rectifiers.

Conventional multiple semiconductor rectifier devices (hereinafter referred to as elements)
A semiconductor rectifier using a semiconductor rectifier is assembled by stacking elements and cooling fins or elements, uncooled fins, and insulators alternately, providing clamping plates at both ends, and tightening them with bolts that pass through both clamping plates. was. However, the tightening force between the element and the cooling fin is important in this type of semiconductor rectifier, so by interposing a spring at the end of the bolt and maintaining the compressive force of this spring at a specified level, the tightening force is I tried to maintain the best force.

By the way, when this semiconductor rectifier is used in a plant or the like, if the element needs to be replaced due to a malfunction or other cause, the bolts must be removed. This is almost the same state as complete disassembly, and in a plant or the like without assembly equipment, it is not easy to secure the above-mentioned tightening force at a predetermined level again, making it difficult to replace the element.

Therefore, the present invention locks the compression force of the spring that maintains the clamping force between the element and the cooling fin at a predetermined level before replacing the element, and releases this lock after replacing the element to maintain the predetermined clamping force. An object of the present invention is to provide a semiconductor rectifier device in which it is extremely easy to re-secure.

An embodiment of the present invention will be described below with reference to the drawings.

1, 2, and 3, 1 is a base, 2 is a frame fixed to one side of the base 1, and 3 is a frame facing the frame 2 and fixed to the other side of the base 1. 4 is a cooling fin having an appropriate heat dissipation surface and a terminal (not shown); 5 is an element; 6 is an intermediate member; 7 is an insulating seat; 8 is a pivot member attached to the intermediate member 6; 9 is a frame. 2 is an adjustment bolt that is screwed into the bolt so that it can move forward and backward, has a pivot-shaped tip, and contacts the insulating seat 7 to adjust the tightening force between the element 5 and the cooling fin 4; 10 is a height difference on both sides of the cooling fin 4; One end is fixed to the frame 2, the other end passes through the frame 3 and is tightened with a nut 10a, and the middle part passes through the intermediate member 6. A tightening bolt 11 connects the intermediate member 6 and the frame. A spring is inserted into the tightening bolt 10 between the bodies 3 and applies a tightening force to the element 5 and the cooling fin 4; 12 is a tightening force lock screw passing through the frame 3 and having an end screwed into the intermediate member 6; 1
3 is made of an insulating material and has a convex portion 13a on one side for regulating the position of the cooling fin 4; a seat plate attached to the base 1; 14 is made of an insulating material and regulating the position of the cooling fin 4; It has an end surface 14a that
A stop plate attached to the base 1, 15 (as shown in the third figure)
is an element exchange jig insertion hole.

As shown in FIGS. 4, 5, and 6, the cooling fins 4 are provided with grooves 4a whose bottom surfaces are inclined in the horizontal diametrical direction on the contact surface of the element 5. Further, a recessed portion is provided in the seat plate 13 so that the insulation distance between the cooling fins serving as a conductive portion is increased.

Next, the procedure for exchanging elements will be explained.

First, rotate the tightening force lock screw 12 to release the spring 11.
This compressive force is held by the intermediate member 6 and the frame 3. As a result, the tightening force of the spring 11 hardly acts on the element 5 or the cooling fins 4. That is, the tightening force of the spring 11 is locked.

Next, the adjusting bolt 9 is rotated and moved backward (moved to the right in FIGS. 1 and 2) to separate the cooling fin 4 and the element 5, and the defective element is replaced. Here, since one of the tightening bolts 10 is located at a lower position with respect to the base 1, it can be removed by moving the element 5 in a substantially horizontal direction, and the tightening bolt 10 is disposed at the same position as in the conventional case. The work is much easier than moving the element diagonally upward.

Further, when the cooling fins 4 and the element 5 are in close contact with each other and it is difficult to separate them, they can be easily separated by inserting an appropriate tool into the grooves 4a of the cooling fins 4 and applying a light external force. After installing the new element, return the adjustment bolt 9 to its previous state and then loosen the tightening force locking screw 12 to apply the initial tightening force again.

Since the present invention is constructed as described above, the elements can be easily replaced even in plants without assembly equipment, and the tightening force between the elements and cooling fins is important in this type of semiconductor rectifier. can be easily restored to the predetermined value at the factory, making plant maintenance work easier, shortening the replacement work period, improving plant operating efficiency, and making effective use of invested capital. Can be done.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention;
The figure is a front view of figure 1, figure 3 is a side view of figure 1,
Fig. 4 is a cross-sectional view taken along the - line in Fig. 2 in the direction of the arrow, Fig. 5 is a side view taken along the - line in Fig. 4 in the direction of the arrow, and Fig. 6 is a sectional view of Fig. 4. It is a sectional view taken along the - line in the direction of the arrow. DESCRIPTION OF SYMBOLS 1... Base, 2, 3... Frame body, 4... Cooling fin, 5... Element, 10... Tightening bolt, 11
...Spring, 12...Tightening force locking screw.

Claims (1)

[Scope of utility model registration request] A base disposed horizontally, a pair of frames provided at both ends of the base, one end fixed to one of the frames and the other end penetrating through an intermediate member and the other of the frames. a pair of bolts having nuts attached to their ends and provided in a staggered manner; a pair of disc springs passing through the bolts between the intermediate member and the other frame body; a tightening force locking bolt that passes through a through hole in a frame and is screwed into a screw hole of a pivot member that is fixed to the intermediate member; and a semiconductor element that is provided between the intermediate member and the one frame. and cooling fins alternately stacked, and an adjustment bolt that is screwed onto one of the frames and whose end abuts against the laminate to adjust the pressure contact force of the laminate; A semiconductor rectifying device characterized in that the pressing force applied to the laminate is eliminated by tightening a tightening force locking bolt.