JPS609506Y2 - Remote control piping fittings - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a pipe joint, and more particularly to the structure of a pipe joint that allows pipes to be quickly and easily attached and detached by remote control.

In general, towers and tanks used in spent nuclear fuel reprocessing plants, waste liquid treatment plants for nuclear material with high levels of radioactivity, or plants filled with highly concentrated toxic gases are subject to corrosion due to the materials they contain. Many of them are sexual.

Therefore, there are many chances that the towers and tanks used for the above-mentioned purposes and the pipes connected thereto will corrode or break down, and if such a situation occurs, they must be replaced with new ones.

Incidentally, such replacement work requires the attachment and detachment of a large number of pipes installed in towers and tanks, and this work must be performed by remote control to ensure the safety of workers.

Under the above-mentioned circumstances, there is a need for a simple pipe joint structure that allows each pipe to be quickly and easily connected and removed by remote control in this type of tower and tank.

First, before describing the details of the remote-controlled piping joint according to the present invention, an example of a device for a spent nuclear fuel reprocessing plant in which this remote-controlled piping joint is mainly used will be explained.

Figures 1 and 2 are schematic diagrams of towers and tanks used in spent nuclear fuel reprocessing plants and waste liquid treatment plants with high levels of radioactivity, with Figure 1 being a front view and Figure 2 being a front view. FIG.

The tower body 1 is attached to a removable pedestal 3 via a bracket 2, and the removable pedestal 3 is removably attached to a fixed pedestal 5 fixed to a foundation 4 and having extensions 5a in two directions with a fixed metal fitting 6. It is being

Actually, machining is performed at the position where the fixed hardware 6 is provided, and the hardware is accurately positioned for attachment.

The fixed pedestal 5 and the removable pedestal 3 are mounted on a foundation 4 (not shown).
It is housed in a room with a power manipulator, and remote control equipment such as a power manipulator is installed above it.

(A large number of towers and tanks as shown in FIG. 1 are arranged in the front and back direction of the paper surface of the paper, and windows W are provided along the towers and tanks as shown in FIG. 2.) A large number of fixed pipes 7 are directly connected to the tank body 1, and also pipes 9
A flange 8, which is fixed through the pipe, is attached to each, and the other end of the fixed pipe 7 is attached to a removable frame 3 which is machined.
The piping 9 is connected to the piping joint 11 attached via a support 10 on the top, and the piping 9 is connected to the piping joint 11 via a piping joint 12 and a piping 13, respectively.

On the other hand, the end of the fixed pipe 14 led into the room is attached to a pipe joint 16 attached to the extension part 5a of the fixed frame 5 via a machined support 15.

A detachable pipe 17 is provided between the pipe joints 11 and 16.

Note that machining is also performed on the extension portion 5a of the fixed frame 5.

Further, a large number of pipe joints 11 and 16 are arranged in a line on both sides of the detachable pedestal 3 and on the extension 5a of the fixed pedestal 5, respectively.

In the above example, the piping joints are arranged in four rows as shown in FIG.

By arranging the pipe joints 11, 16 in this manner, remote control becomes easy.

That is, in reality, the pipe joint 11 is connected from the monitoring window W shown in FIG.
．． In this case, by aligning the initial position of the manipulator with the first pipe fitting, from then on, the pipe fittings can be moved one after another by only performing two-dimensional alignment. Can be controlled remotely.

In the spent nuclear fuel reprocessing plant shown in FIGS. 1 and 2, the column body 1 is attached to and detached from the fixed pedestal 5 by attaching and detaching the piping joints 11 and 16 automatically by remote control. It can be removed and installed together.

The present invention provides a pipe joint having an optimal structure for the pipe joints 11 and 16 shown in FIGS. 1 and 2, which allow pipes to be attached and detached by remote control.

The structure of the piping joint according to the present invention, which is related to the above object, is that a plurality of grooves are radially provided at the same position on the peripheral edge of flanges fixed to the ends of the fixed piping and the detachable piping, respectively. An eye bolt with a nut screwed into it via a pin is supported by brackets fixed on both sides of a groove provided in one flange. When the two flanges are separated, a rotational moment is applied that causes the flanges to escape from these grooves, and the flange surface on the side where the eye bolt is not installed has the flange on the side where the eye bolt is installed. A protruding pin is inserted into the hole provided, and when the two flanges are joined, this pin contacts a part of the eye bolt and stands up, and the eye bolt is inserted into the groove provided in both flanges. is inserted, and in the above state, the nut screwed into the eye bolt is rotated to fasten the two flanges.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 3 is a side sectional view showing a part of the remote-controlled piping joint according to the present invention, and FIG. 4 is a front sectional view showing the main part of the piping joint.

The remote control piping joint according to the present invention has a lower flange 2 fixed to the fixed piping 20 in FIGS. 3 and 4.
1 and the upper flange 26 fixed to the detachable piping 27 will be described as corresponding to the piping joints 11, 12, 16 of the apparatus shown in FIGS. 1 and 2.

A lower flange 21 is fixed to the upper end of the upright fixed pipe 20, two brackets 22 are provided on the lower surface of the lower flange 21, and an eye bolt 24 is supported by a pin 23 fixed to the bracket 22 so as to be freely foldable. A nut 25 is screwed onto this eye bolt 24.

Reference numeral 26 designates an upper flange to which a detachable pipe 27 is fixed, and both flanges 21 and 26 are provided with four grooves 28 (guiding surfaces) in the radial direction as shown in FIG. swings in the radial direction of this flange to form this groove 28.
It is now possible to enter and leave.

A claw portion 29 protrudes from the lower end of the eyebolt 24 toward the direction of the pipe 20, and a pin 30 fixed to the upper flange 26 protrudes downward to connect the lower flange 21.
is provided with a hole 21a into which the pin 30 is inserted, and when the lower flange 21 and the upper flange 26 overlap, the tip of the pin 30 passes through the hole 21a provided in the lower flange 21 and further passes through the hole 21a formed in the lower flange 21. Claw portion 29 provided on the bolt
When pressed, a moment is generated that rotates from the state shown by the chain line to the state shown by the solid line in FIG.

A weight 24a is provided on the bolt 24 so that when the pin 30 rises and no longer presses the claw portion 29, the bolt 24 automatically falls into the state shown by the chain line.

Further, 31 is an O-ring which maintains airtightness of the surfaces of both flanges 21 and 26.

Further, a sloped surface is formed at the upper part of the groove 28 of the upper flange 26, and the lower sloped surface of the nut 25 is fitted into the sloped surface to stabilize the nut 25.

32 is a cotter pin that prevents the nut 25 from coming off the bolt 24; 33 is a cotter pin that prevents the pin 23, which swingably supports the bolt 24, from coming off the bracket 22.

Next, the operation of the present invention will be explained.

When attempting to release a connected state in which the flanges of the piping joint overlap as shown in Fig. 3, the driving end of an impact wrench supported by a power manipulator is fitted into the nut 25. drive it to loosen this nut 25.

Once the nut 25 has been sufficiently loosened as described above, by removing the drive end of the impact wrench from the nut 25, the bolt 24 is automatically rotated in the direction of arrow M by the action of the weight 24a, and the flange 26 is rotated. It comes off from the groove 28 which is the guide surface.

In the above state, when the detachable pipe 27 is removed together with the flange 26, the connection between the pipes 20 and 27 is severed.

Thereafter, the detachable pipe 27 can be separated from the fixed pipe 20 by pulling up the detachable pipe 27.

Conversely, when assembling a piping joint, a pin 30 protruding downward from the upper flange 26 is inserted into the hole 21a provided in the lower flange 21 to accurately control and position the upper flange 26 relative to the lower flange 21. Do it and lower it.

As described above, the pin 30 is inserted into the hole 21 from the lower flange 21.
When it protrudes downward through a, it hits the pawl 29 and presses the pawl 29, raising the bolt 24 from the chain line position to the solid line position and into the groove 28 (guide surface) provided in the flange 26.21. Let it be inserted.

When the above state is reached, use the impact wrench to
5 by rotating and tightening both flanges 21.
．． 26 can be joined.

In the embodiment described above, a weight 24 is attached to the lower end of the bolt to tilt the bolt 25 radially outward of the flange 21.
Although A is provided, the present invention is not limited to this.
For example, a spring may be used to actively apply rotational moment.

Additionally, grooves 28, which serve as guide surfaces, are provided on the flange itself, but if the flange has a small diameter, this structure may not be usable. In addition to guiding the range of motion of the upper flange, it may also be used as a means for fixing the upper flange.

In the present invention, one flange is provided with a pin that protrudes toward the surface of the other flange, a bolt is pivotably supported on the other flange, and the bolt is used to overlap both flanges using the pin. In this case, the bolt is configured to engage with a guide surface of a mating flange.

Therefore, according to the present invention, when disassembling the piping of a tower or tank, for example, the manipulator is operated to engage the drive end of the impact wrench with the nut 25 and rotate it in the opposite direction, thereby tightening the nut as shown in FIG. 25 is raised, and then the drive end is removed, the bolt 24 automatically rotates to the position shown by the chain line due to the moment acting in the direction of the arrow M, making it possible to remove the attachment/detachment pipe 27 side. It is.

Since the present invention is constructed as described above, the plurality of bolts provided on one flange can be easily tightened and loosened, the piping joint can be fixed and released, and the OIJ ring can be tightened and loosened.

Furthermore, since the bolts are automatically turned upside down in the radial direction of the flange when the joint is attached or detached, there is no need for preparatory work before attachment or detachment or tightening.

Further, according to the present invention, since a plurality of pipes can be attached and detached together, the work of replacing towers and tanks becomes easy.

As mentioned above, the present invention allows the piping to be easily attached and detached, so it can be used in used reprocessing plants, waste liquid treatment plants for nuclear materials with high levels of radioactivity, or in areas filled with highly concentrated toxic gases. This makes it possible to easily replace or inspect factories' towers and tanks by remote control.

[Brief explanation of drawings]

Figure 1 is a front view showing the schematic structure of the equipment including towers and tanks.
The figure is a plan view thereof. FIG. 3 is a side sectional view showing the main parts of a piping joint according to an embodiment of the present invention, FIG. 4 is a front view thereof, and FIG. 5 is a plan view of a flange. 1... Tower tank main body, 3... Removable mount, 5
...Fixed frame, 11. 12. 16...
...Piping joint, 17...Detachable piping.

Claims (1)

[Scope of utility model registration request] Multiple grooves are provided radially at the same position on the periphery of flanges fixed to the ends of fixed piping and removable piping, respectively, and pins are attached to brackets fixed on both sides of the grooves provided on one flange. An eyebolt with a nut screwed together is supported through the eyebolt, and when the two flanges are joined, the eyebolt is inserted into both grooves, and when the two flanges are separated, the eyebolt is inserted into both grooves. The flange surface on the side where the eye bolt is not provided has a pin that is inserted into the large direction provided on the flange on the side where the eye bolt is provided, and this pin In the state where the two flanges are joined together, contact a part of the eye bolt to make it stand up, insert the eye bolt into the groove provided in both flanges, and in the above state, rotate the nut screwed onto the eye bolt. A remote-controlled piping joint characterized in that it is configured so that two flanges are fastened together.