JPH02250781A - Dividing tool for pipe seal ring - Google Patents

Abstract

PURPOSE:To simply divide only a seal ring and simplify the tool and equipment required for the oil leakage repairing work by operating a screw bar to advance one cutting edge, pinching a base between both cutting edges, and dividing the seal ring into two. CONSTITUTION:A base 30 is inserted into a pipe 4, cutting edges 22 and 23 are provided on opposite sides, and the cutting edges 22 and 23 are put on a seal ring 10 from both sides. As a result, the inside of the pipe 4 is supported by the base 30, and the seal ring 10 is pinched by both cutting edges 22 and 23 on the pipe 4 at the fixed state and divided into two.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is aimed at preventing oil leakage from the joints of hydraulic piping used in the switching operation circuit in gas-insulated switchgear equipment delivered to power plants and substations. This relates to a tool for splitting seal rings for piping, which is used when repairing pipes.

[Prior Art] A conventional splitting tool for this type of piping seal ring will be explained with reference to FIGS. 5 to 15.

FIG. 5 is a perspective view showing gas insulated switchgear to be delivered to power plants and substations. In the figure, (1) is gas-insulated switchgear, which has three phases. (2) is a centralized hydraulic housing in which a hydraulic system (not shown) for opening and closing the gas insulated switchgear (1) is housed. (3)
is a duct, and internal piping (4), (5), and (6) lead hydraulic equipment for opening/closing operations to each phase. Each pipe (4
), (5), and (6) have a joint part (4a
), (5a), (6a) and the joint part (4
b), (5b), and (6b) are provided.

FIG. 6 shows the joint parts (4a) and (5a) of FIG. 5.

In Figure 0, which is an enlarged vertical side view of (6a), Figure 7 is a right side view of Figure 6, and Figure 8 is an exploded view of Figure 6, (7) is a right angle joint, (8 ) is the packing, (9) is the fitting, (10) is the seal ring, (11) is the nut, and (12) is the oil under high pressure (hereinafter referred to as hydraulic pressure).
, (13) are grooves provided in the pipes (4), (5), and (6). Now, between the right angle joint (7) and the joint fitting (9), use the hexagon spanner (14) to connect the hexagonal part (9a) of the joint fitting (9).
), it is tightened by tightening the padskin (8
) to seal the hydraulic pressure (12). Further, the fitting (9) and the nut (11) are tightened by tightening the nut (11) with a hexagon spanner (14) as shown in FIG.
) into the groove (13) as shown in Figure 6.
It fits in and seals the hydraulic pressure (12).

FIG. 9 shows the joint parts (4b) and (5b) of FIG. 5.

(6b) is an enlarged longitudinal sectional side view, and FIG. 10 is an exploded view of FIG. 9, and the joint part (4a) in FIGS.
, (5a), and (6a) are given the same reference numerals and explanations will be omitted.

In the figure, (15) is a straight joint, and joint fittings (9) are attached from both sides.

By the way, in the gas-insulated switchgear as described above, the cause of oil leakage is almost always a flaw in the seal ring (10). If the seal ring (10) is scratched, oil will leak from here, but since the leaking oil is red, you can easily see where it is, so use the hexagon spanner (14) to return the nut (11). When the pipes (4) are removed, seal rings (10) are attached to them as shown in FIG. 11. As described above, each of the seal rings (10) is stuck in the groove (13) of the pipe (4) and therefore cannot be easily removed from the pipe (4).

For this purpose, conventionally, the pipe material (16) is fixed in a vise (17) as shown in FIG. (16a) is bent using a hydraulic pipe bender (19) as shown in FIG.
As shown in Fig. 15, groove cutting tools (20
) to form a bite groove (13) and connect the pipe (4).
After manufacturing, new nuts (11) and seal rings (10) are inserted at both ends, and the piping (4) with the scratched seal ring (10) attached as shown in Fig. 11 is replaced.

[Problem to be Solved by the Invention 1] As described above, conventionally there is no piping seal ring splitting tool for splitting and removing the seal ring (10) from the piping (4) removed from the gas insulated switchgear (1). So,
The entire piping was replaced by manufacturing a new one that was the same as the removed piping (4). For this reason, when we receive a complaint about an oil leak, we arrange for pipe material (
16) In addition to materials and parts such as the seal ring (10), tools and equipment necessary for pipe production include a vise (17) shown in Figure 12 and a pipe cutter (18) shown in Figure 13.
, the hydraulic pipe bender (19) shown in Fig. 14, the first
The grooving tool (20) shown in Figure 5 had to be transported by truck, etc., and the work required skill and time for pipe fabrication, especially grooving work. .

This invention was made to solve this problem, and by breaking and removing the seal ring from the removed piping, the seal ring can be replaced with a new one, allowing the existing piping to be used as is, and thereby making it possible to remove oil. The purpose of the present invention is to obtain a splitting tool for piping seal rings that can simplify the tools and equipment necessary for leakage repair work and shorten the work time.

[Means for Solving the Problems] In order to achieve the above object, a piping seal ring splitting tool according to the present invention includes a ring-shaped frame that covers the piping and the seal ring, and a ring-shaped frame that is attached to the frame and that is attached to the frame. The ring includes a cap that supports the pipe from the inside, cutting blades provided at opposing positions on the ring of the frame, and a threaded rod that threads at least one of the cutting blades.

[Function] In this invention, with the mouthpiece inserted into the pipe, cutting blades are also provided on the opposite side, and the cutting blades are applied to the seal ring from both sides, so that the inside of the pipe is supported by the mouthpiece, and the seal ring is 2. It is caught between both cutting blades on a fixed pipe.
It splits into two.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS. 1 to 4. Fig. 1 is a front view, Fig. 2 is a sectional view taken along line II-II in Fig. 1, Fig. 3 is a perspective view showing the state of use, and Fig. 4 is a
It is an exploded perspective view of the figure, and the same parts as the conventional one are given the same reference numerals and explanations will be omitted. In the figure, (21
) is a ring-shaped frame that covers the pipe (4) and the seal ring (10), (22) is an upper cutting blade that is screwed into the upper part of the frame (21) so that it can move forward and backward, and (23) is an upper cutting blade (22).
The lower cutting blade is inserted movably into the lower part of the frame (21) so as to face the frame (21), and (24) is a handle extending to the lower part of the frame (21), and there is a guide hole (24) into which the lower cutting blade (23) is inserted. 25).

(26) is a screw hole (27) provided below the handle (24).
) is a screw thread that is screwed into the screw hole (26), and the lower cutting edge (23
) is connected to the ball part (23a) by the ball part (27a). (28) is a cap mounting plate detachably attached to the frame (21) with screws (29), and (30) is detachably attached to the dowel (28a) of the cap mounting plate (28) through a dowel hole (30a). The cap has an outer diameter that fits into the pipe (4), and several types with different outer diameters are available to match pipes of various diameters. (31) is the lower cutting edge (
The groove (32) is a screw screwed into the handle (24) so as to engage with the groove (31), and the lower cutting blade (23) moves up and down along this screw (32). move.

As shown in Figure 11, attach the cap (30 mm) to one end of the removed pipe (4).
), fit the frame (21), and insert the upper cutting blade (2
2) to position the pipe (4) with respect to the base (30). Next, as shown in FIG. 3, slowly turn the spanner (33) to raise the lower cutting edge (23) and bring it into contact with the seal ring (10). In this way, with the pipe (4) supported on the inside by the base (30) and the seal ring (I O) being sandwiched between the upper and lower cutting blades (22) and (23), slowly turning the wrench (3J) , upper and lower cutting blades (
22) and (23) each bite into the seal ring (1o) and are split into two. At this time, since the pipe (4) is supported on the inside by the base (30), it will not be dented or damaged, so the new seal ring (1
0) can be inserted and reused.

[Effects of the Invention] As described above, according to the present invention, only the seal ring can be easily broken, so it is possible to replace only the seal ring and use the existing piping as it is, thereby reducing oil leak repair work. The effect is that the required tools and equipment can be simplified and the working time can be shortened.

[Brief explanation of drawings]

Fig. 1 is a front view showing one embodiment of the present invention, Fig. 2 is a sectional view taken along line II-II in Fig. 1, Fig. 3 is a perspective view showing the state of use, and Fig. 4 is a sectional view taken along line II-II in Fig. 3. Exploded perspective view, Figure 5 is a perspective view showing gas insulated switchgear to be delivered to power plants and substations, Figure 6 is an enlarged view of the joints (4a) to (6a) in Figure 5. 7 is the right side view of FIG. 6, FIG. 8 is an exploded view of FIG. 6, and FIG. 9 is the joint part of FIG.
4b) to (6b) are enlarged vertical side views, FIG. 10 is an exploded view of FIG. 9, FIG. 11 is a view showing the piping (4) removed from FIG. 5, and FIG. FIG. 13 is a diagram showing a pipe sizing operation, FIG. 14 is a diagram showing a pipe bending operation, and FIG. 15 is a diagram showing a pipe grooving operation. In the figure, (4) is a pipe, (10) is a seal ring,
(21) is the frame, (22), (23) are the cutting blades, (2
7) indicates a threaded rod, and (30) indicates a cap. Note that the same reference numerals in the figures indicate the same or corresponding parts. Figure Figure 30 Figure Figure 30 Figure Figure 13 Title of the invention 3 Address of the person making the amendment (voluntary) Piping seal ring splitting tool

Claims (1)

[Claims] (1) A splitting tool used to split and remove a seal ring inserted as a sealing material on a pipe from above the pipe, which includes a ring-shaped frame that covers the pipe and the seal ring, and a frame that is attached to this frame. a ring that supports the piping from inside; a cutting blade provided at opposing positions on the ring of the frame; and a threaded rod that threads at least one of the cutting blades, the threaded rod being operated. A tool for splitting a seal ring for piping, characterized in that the seal ring is split into two by sandwiching the cap between the two cutting blades by screwing the one cutting blade.