JP5307648B2 - Vacuum valve - Google Patents

Description

  The present invention relates to a vacuum valve, and more particularly to an assembly structure thereof.

FIG. 4 is a side sectional view showing a conventional vacuum valve. In the figure, a fixed side end plate 22 and a movable side end plate 23 are brazed and fixed to both ends of an insulating container 21, a fixed electrode rod 24 is fixed to the fixed side end plate 22, and a bellows is fixed to the movable side end plate 23. A movable electrode rod 26 is brazed and joined via 25 to form a vacuum vessel. Furthermore, a fixed electrode 27 is brazed to the fixed electrode rod 24, and a movable electrode 28 is brazed to the movable electrode rod 26, and they are arranged coaxially facing each other. A resin guide 29 for guiding the movement of the movable electrode rod 26 is fixed to a guide mounting plate 30 with a screw hole fixed to the movable side end plate 23 by screws.
In addition, shields 31 and 32 are disposed so as to cover the inner surface of the insulating container 21 and the bellows 25.
The resin guide 29 slides the movable electrode rod while aligning the axes of the fixed electrode rod 24 and the movable electrode rod 26 when the fixed electrode 27 and the movable electrode 28 are opened and closed by an operation mechanism not shown in the drawing. It has a function (for example, refer patent document 1).

JP-A-9-320412 (page 4, FIG. 1)

  In the conventional vacuum valve as shown in Patent Document 1, since the resin guide 29 is structured to be screwed, a guide mounting plate 30 having a screw hole is provided in addition to the movable side end plate 23 that holds the vacuum. There was a need. For this reason, there was a problem that the number of parts increased. Further, the guide mounting plate 30 needs to have a sufficient thickness to secure the screwing strength, and also needs to pay attention to the fixing strength to the movable side end plate 23, so that the structural design becomes complicated. There was also a problem. In addition, screwing work in the screwing process, management of small screws, and screw torque management are time-consuming and cause screwing defects.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a vacuum valve that reduces the number of parts and makes the mounting simple in mounting the movable side end plate and the guide. .

  The vacuum valve according to the present invention includes a fixed electrode portion that can be contacted and separated, and a movable electrode inside a vacuum vessel that is configured by hermetically bonding a fixed side end plate and a movable side end plate to both end faces of a cylindrical insulating container. In a vacuum valve in which an electrode portion is arranged and a guide for guiding a movable electrode rod of a movable electrode portion led out from a vacuum vessel through a bellows in an axial direction is attached to a movable side end plate, the guide is movable electrode rod And a flange portion attached to the movable side end plate. The movable side end plate has a through hole through which the cylindrical portion of the guide is inserted in the center portion, and a plurality of inner peripheries of the through holes. A locking portion that protrudes in the lead-out direction of the movable electrode rod is formed at the location, and the locking portion is fitted into an engagement hole provided in the collar portion of the guide, so that the guide is fixed to the movable side end plate. It is what.

  According to the vacuum valve of the present invention, in the vacuum valve provided with the movable side end plate provided on the movable side of the insulating container and the guide for guiding the movable electrode rod in the axial direction, the guide penetrates the movable electrode rod. The movable side end plate has a through hole through which the cylindrical portion of the guide is inserted, and is provided at a plurality of locations on the inner periphery of the through hole. A locking part protruding in the lead-out direction of the movable electrode rod is formed, and the locking part is fitted into an engagement hole provided in the collar part of the guide so that the guide is fixed to the movable side end plate. Therefore, the number of parts can be reduced in mounting the movable side end plate and the guide, and a vacuum valve that can be easily mounted without requiring a fastening operation such as screwing can be obtained.

It is side surface sectional drawing of the vacuum valve by Embodiment 1 of this invention. It is a top view of the movable side end plate of FIG. It is side surface sectional drawing of the vacuum valve by Embodiment 2 of this invention. It is side surface sectional drawing which shows the structure of the conventional vacuum valve.

Embodiment 1 FIG.
Hereinafter, the vacuum valve according to the first embodiment will be described with reference to the drawings.
In FIG. 1, a vacuum valve is provided in an insulating container 1 formed in a cylindrical shape with an insulating material such as ceramic, a fixed end plate 2 provided at one open end of the insulating container 1, and provided at the other open end. A vacuum vessel constituted by the movable side end plate 3 is provided. Inside the vacuum vessel, there are a fixed electrode portion composed of a fixed electrode rod 4 fixed to the fixed side end plate 2 and a fixed electrode 5 fixed to the tip thereof, and a bellows 6 on the movable side end plate 3 via a bellows 6. A movable electrode portion 7 composed of a movable electrode rod 7 provided so as to be movable and a movable electrode 8 fixed to the tip of the movable electrode rod 7 is disposed opposite to each other on the same axis. The movable electrode part is configured to be able to contact and separate from the fixed electrode part by moving on the axis.

The insulating container 1 and the two end plates 2 and 3 are joined to each other by forming a metallized layer on both ends of the insulating container 1 and bringing the both end plates 2 and 3 into contact with each other and brazing. Further, the bellows 6 and the movable electrode rod 7, and the bellows 6 and the movable side end plate 3 are also airtightly joined by brazing.
The bellows 6 is made, for example, in a bellows shape with a thin stainless steel plate, and allows the movable electrode rod 7 to move while keeping the inside of the insulating container 1 airtight.
Further, a shield 9 is attached to the inside of the insulating container 1 to prevent the metal vapor generated from the electrodes 5 and 8 from adhering to the inner surface of the insulating container 1 at the time of interruption, and to maintain the creeping withstand voltage. It plays a role.

A guide 10 made of an insulating member for guiding the movable electrode rod 7 to move in the axial direction is attached to the movable side end plate 3.
Moreover, as a material of the fixed side end plate 2 and the movable side end plate 3, for example, a thin plate such as an Fe—Ni—Co alloy or stainless steel is used.

In the vacuum valve configured as described above, in the closed state, the movable electrode rod 7 is driven by a driving device (not shown) and moves upward in the figure, so that the fixed electrode 5 and the movable electrode 8 are in contact with each other. Further, in the open state, the movable electrode rod 7 moves downward and opens and closes so that the movable electrode 8 is separated from the fixed electrode 5.
Since the present invention is characterized by the mounting of the guide 10, the mounting portion will be described in detail below. FIG. 2 is a plan view of the movable side end plate 3 of FIG. 1 viewed from the bottom surface side. This will be described with reference to FIG. FIG. 1 shows a cross section viewed from the direction of arrows BB in FIG.

The guide 10 is attached to the movable side end plate 3 and the cylindrical portion 10a having an inner diameter slightly larger than the diameter of the movable electrode rod 7 for guiding the movable electrode rod 7 to move in the axial direction. And a collar portion 10b provided on one end side of the cylindrical portion 10a.
On the other hand, the movable side end plate 3 has a through hole 3a through which the cylindrical portion 10a of the guide 10 is inserted in the center, and the movable electrode has, for example, three movable electrodes at 120 ° intervals on the inner periphery of the through hole 3a. A locking portion 3b that protrudes in the direction in which the rod 7 is led out is formed.

The locking portion 3b will be described in more detail. As shown in FIG. 1, the locking portion 3 b is a hook-shaped protrusion that is made of an elastic band member and has a folded portion formed at the tip. In order to manufacture the hook-shaped protrusion from the same member as the movable side end plate 3, for example, the inner side of the through hole 3a of the movable side end plate 3 is further extended toward the center side as indicated by a broken line in FIG. A band-shaped portion may be formed in advance, the band-shaped portion may be bent at a right angle to the side opposite to the side joined to the insulating container 1, and the end may be folded outward at an acute angle to form a folded portion. Thus, when it comprises with one metal plate with the movable side end plate 3, it can form by press work.
In addition, the latching | locking part 3b may be manufactured with a member different from the movable side end plate 3, and may be joined by brazing or welding.
Moreover, although FIG. 2 demonstrated the case where the three latching | locking parts 3b were provided, it is not limited to three places, What is necessary is just two or more places.

  A rectangular engaging hole 10c is provided in the collar portion 10b of the guide 10 at a position corresponding to the locking portion 3b. The engagement hole 10c is formed in such a size that the folded portion of the locking portion 3b can be inserted with elasticity. That is, the short side dimension of the rectangular engagement hole 10c is smaller than the T dimension in FIG.

For assembling the guide 10 to the movable side end plate 3, the engaging hole 10 c of the guide 10 is aligned with the engaging portion 3 b of the movable side end plate 3 and pushed in by utilizing the elasticity of the folded portion. At this time, the turn-back angle A (see FIG. 1) of the turn-up portion is increased, and the turn-up portion is the engagement hole 10c at the insertion end pushed in until the upper surface of the collar portion 10b of the guide 10 contacts the lower surface of the movable side end plate 3. The guide 10 is fixed to the movable side end plate 3 by being restored from its original shape and opened in its original shape. This state is shown in FIG. As can be seen from the figure, the dimension of the folded portion is set so that the distance between the folded end of the folded portion and the lower surface of the movable side end plate 3 is substantially the same as the thickness of the collar portion 10b of the guide 10. I have decided.
As described above, the movable side end plate 3 and the guide 10 are structured such that the engaging portion 3b of the movable side end plate 3 is fitted into the engagement hole 10c of the guide 10, so that the mounting is simply performed by attaching the guide 10 to the movable side end. It is only necessary to press-fit into the plate 3, and screwing work is not necessary as compared with the screwing type.

As described above, according to the vacuum valve of the first embodiment, in the vacuum valve provided with the guide for guiding the movable electrode rod in the axial direction on the movable side end plate of the insulating container, the guide is penetrated by the movable electrode rod. The movable side end plate has a cylindrical portion and a flange portion that is attached to the movable side end plate. The movable side end plate has a through hole through which the cylindrical portion of the guide is inserted in the central portion, and is movable at a plurality of locations on the inner periphery of the through hole. A locking part protruding in the lead-out direction of the electrode rod is formed, and the locking part is fitted into an engagement hole provided in the collar part of the guide so that the guide is fixed to the movable side end plate. Therefore, in mounting the movable side end plate and the guide, the number of parts can be reduced, and a vacuum valve that can be easily mounted without requiring fastening work such as screwing can be obtained. For this reason, complicated operations such as management of small screws and screw torque are eliminated, and assembly work is simplified.
Further, the number of parts can be reduced and the structure can be simplified.

  Further, the engaging portion provided on the inner periphery of the movable side end plate is a hook-shaped protrusion made of an elastic band-shaped member and having a folded portion formed at the tip, and the hook-shaped protrusion is formed in the engagement hole of the guide. Since the guide is fixed to the movable side end plate by restoring the original shape of the folded portion that is press-fitted and exposed from the engagement hole, the guide is assembled to the movable side end plate. Is simply press-fitted into the movable side end plate, and can be easily assembled.

  In addition, since the movable side end plate and the locking portion are formed from a single metal plate, it is possible to manufacture by pressing or the like without the need to join the locking portion, and the manufacturing is simple. Become.

Embodiment 2. FIG.
3 is a side sectional view showing the structure of a vacuum valve according to Embodiment 2 of the present invention. (A) shows the middle of the assembly of the guide, and (b) shows the assembled state. Parts equivalent to those in FIG. 1 of the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences will mainly be described. The difference is the structure of the mounting portion between the movable side end plate 3 and the guide 10.

The movable side end plate 3 has a through hole 3a having an inner diameter larger than the outer diameter of the cylindrical portion 10a of the guide 10 on the center side. The locking portion 3c that protrudes in the lead-out direction is formed in the same manner as in FIGS. 1 and 2, but the locking portion 3c of the present embodiment is shown in FIG. Unlike 1 and FIG. 2, the folded portion is not formed at the tip, and is a belt-like locking plate.
The guide 10 has substantially the same shape as that of FIG. 1 of the first embodiment. However, the dimension of the short side of the rectangular engagement hole 10c is slightly larger than the thickness of the locking plate, as long as the locking plate is inserted. A large degree is sufficient.

As shown in FIG. 3B, the assembly from the state of FIG. 3A is performed by using a tool or the like on the front end side of the locking portion 3c (locking plate) protruding from the engagement hole 10c. It is bent at a right angle toward the side and fixed to the guide 10. This state is shown in FIG. In this way, the guide 10 can be fixed only by bending the tip, so that a complicated screwing operation is not required as in the case of FIG.
Compared with the shape of FIG. 1, the number of man-hours for bending the tip portion during assembly increases. However, the gap between the tip of the folded portion and the lower surface of the movable side end plate, which was necessary in the case of FIG. No need for dimensional control to match the thickness of the part.

As in the case of the first embodiment, the engaging portion 3c is simple because it can be manufactured by pressing or the like if it is made of the same member as the movable side end plate 3, but it is welded or brazed as a separate member. It may be fixed with.
Moreover, although the latching | locking part 3c demonstrated in the case where three places were provided, it is not limited to three places, What is necessary is just two or more places.

  As described above, according to the vacuum valve of the second embodiment, the locking portion provided on the inner periphery of the movable side end plate is a band-shaped locking plate that protrudes in the direction in which the movable electrode rod is led out. Since the locking plate is inserted into the engagement hole of the guide and the distal end side of the locking plate is bent at a right angle toward the outer periphery of the guide, the guide is fixed to the movable side end plate. When the guide is fixed to the plate, no complicated screwing work is required, and assembly can be easily performed. Moreover, compared with Embodiment 1, the dimension management of the latching | locking part of a movable side end plate becomes easy.

DESCRIPTION OF SYMBOLS 1 Insulation container 2 Fixed side end plate 3 Movable side end plate 3a Through-hole 3b, 3c Locking part 4 Fixed electrode rod 5 Fixed electrode 6 Bellows 7 Movable electrode rod 8 Movable electrode 9 Shield 10 Guide 10a Cylindrical portion 10b Collar portion 10c Hole.

Claims (4)

A fixed electrode portion and a movable electrode portion that can be contacted and separated are disposed inside a vacuum vessel that is configured by airtightly bonding a fixed side end plate and a movable side end plate to both end faces of a cylindrical insulating container, In the vacuum valve attached to the movable side end plate, a guide for guiding the movable electrode rod of the movable electrode portion led out from the vacuum vessel through the bellows in the axial direction,
The guide has a cylindrical portion through which the movable electrode rod penetrates and a collar portion attached to the movable side end plate, and the movable side end plate penetrates through the cylindrical portion of the guide through a central portion. Locking portions that have holes and project in the lead-out direction of the movable electrode rod are formed at a plurality of locations on the inner periphery of the through-hole, and the engagement holes provided in the flange portions of the guides A vacuum valve, wherein a stop is fitted, and the guide is fixed to the movable side end plate. The vacuum valve according to claim 1.
The locking portion provided on the inner periphery of the movable side end plate is a hook-like protrusion made of an elastic band-like member and having a folded portion formed at the tip, and the hook-like protrusion is the engagement of the guide. The vacuum is characterized in that the guide is fixed to the movable side end plate by restoring the original shape of the folded portion exposed to the engagement hole and exposed from the engagement hole. valve. The vacuum valve according to claim 1.
The locking portion provided on the inner periphery of the movable side end plate is a band-shaped locking plate that protrudes in the lead-out direction of the movable electrode rod, and the locking plate is formed in the engagement hole of the guide. A vacuum valve, wherein the guide is fixed to the movable side end plate by being inserted and bent at a right angle toward the outer periphery of the guide. The vacuum valve according to any one of claims 1 to 3,
The vacuum valve characterized in that the movable side end plate and the locking portion are formed of a single metal plate.

Images