JPS6337592Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of a pipe joint, and more specifically, to the structure of a pipe joint that can be quickly and easily attached and detached by remote control, and that is particularly suitable for flowing slurry fluid. It is something.

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 contain corrosive materials. There are many. Therefore, there are many chances that such towers and tanks and the piping 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. Furthermore, some of the pipes allow fluid in the form of slurry to flow, and in this case, it is necessary to prevent the slurry from stagnation at the pipe joints.

Therefore, in these types of towers and tanks, there is a demand for a pipe joint structure that allows each pipe to be quickly and easily connected and removed by remote control, is suitable for slurry transportation, and is simple in structure.

The present invention has been developed in view of this point, and the structure of the present invention is such that an upper mounting member to which piping is fixed and a lower mounting member to which piping is fixed are vertically arranged so that they can be moved toward and away from each other. , so that when the upper mounting member and the lower mounting member are joined, the pipes communicate with each other,
A threaded rod is screwed into the center of an upper frame body in which a communication hole is formed in both mounting members and a claw is swingably supported at both ends, and the claw passes through the lower end of the threaded rod at both ends. The lower frame is configured to penetrate and lock, and the inner side of the claw is arranged so as to abut the upper corner of the upper mounting member, and both claws move in conjunction with the upper frame, which moves up and down by the rotation of the threaded rod. It consists of a pipe joint structure that opens and closes to bring an upper mounting member and a lower mounting member into contact with each other.

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

Figures 1 and 2 are schematic diagrams of towers and tanks used in spent nuclear fuel reprocessing plants, high-level waste liquid treatment plants, etc., with Figure 1 being a front view and Figure 2 being a plan view. It is a diagram. The tower tank body 1 has a bracket 2
is attached to the detachable frame 3 via the detachable frame 3.
is removably attached by means of fixing hardware 6 onto a fixed pedestal 5 which is fixed to the foundation 4 and has extensions 5b in two directions. In reality, the position where the fixing hardware 6 is provided is machined, and consideration is given to keeping it level.

The fixed pedestal 5 and the removable pedestal 3 are housed in a room (not shown), and a remote control device such as a manipulator is disposed above them. A large number of fixed pipes 7 are attached directly to the tower body 1, and pipes 9 passing through flanges 8 are respectively attached to the fixed pipes 7.
The other end is attached to a pipe joint 11 that is attached via a support 10 to a machined detachable frame 3.
Further, the pipe 9 is connected to the pipe joint 11 via a pipe joint 12 and a pipe 13, respectively. On the other hand, a support 1 is placed on the extension part 5b of the fixed frame 5 led into the room.
The end portion is attached to a pipe fitting 16 attached via 5. A detachable pipe 17 is provided between the pipe joints 11 and 16. In addition, the fixed base 5
Machining is also performed on the extension portion 5b. Further, a large number of pipe joints 11 and 16 are arranged in a row on both sides of the detachable pedestal 3 and on the extension portion 5b of the fixed pedestal 5, respectively.

This arrangement facilitates remote control. In other words, the manipulator is actually operated while checking the position of the pipe fitting through the monitoring window C, but in this case, by aligning to the first pipe fitting, only two-dimensional alignment is performed from then on. That's fine.

Furthermore, since the positions of the many pipe joints 11 and 16 are the same, the number of spare parts can be significantly reduced.

Next, the structure of the pipe joint 11, which is an important point of the present invention, will be explained with reference to FIGS. 3 and 4.

FIG. 3 is a diagram showing the opened and closed states of the claw 26,
The right half shows the claw 26 closed and gripping the bottom surface of the lower mounting member A, and the left half shows the claw 26 closed.
The mounting member A is shown in a state where it is separated from the bottom and opened.

A support 10 is fixed on the removable frame 3 with bolts or the like, and a lower mounting member A fixed to one end of the fixed pipe 7 is attached to the support 10.
The upper surface of the lower mounting member A is formed with a recess into which an upper mounting member B, which will be described later, is fitted, and a hole 18 is opened in the center thereof. The hole 18 penetrates the diagonally downward side surface, and the fixed pipe 7 is connected to the hole 1.
It is installed so that it communicates directly with 8. On the other hand, the upper mounting member B, which has a tapered portion at the lower part, is provided with a hole 19 penetrating from the center of the lower surface to the diagonally upper side surface, and an opening on the upper side surface of the hole 19 so that the upper mounting member B can be attached or detached so as to communicate directly with the hole 19. Piping 17 is attached. 20 is an O-ring for leakage prevention.

Then, the tapered portion of the upper mounting member B is fitted into the recessed portion of the lower mounting member A, and is firmly tightened by the tightening mechanism 21. At this time, it is necessary to align the lower mounting member A and the upper mounting member B so that the fixed pipe 7 and the detachable pipe 17 communicate directly, but in reality, the mounting member is also attached to the upper end of the detachable pipe 17. Since the positions of the tube joints 11 and 16 are determined, alignment is easy.

The tightening mechanism 21 includes an impact wrench mounting head 22 at the top and a screw shaft fall prevention ring 23 at the bottom end.
A threaded rod 24 having a diameter is screwed into the upper frame 25, and a lower frame 28 is attached to the lower part of the rod 24 so as to pass through the upper frame 25. Specifically, at both ends of the upper frame body 25 screwed into the threaded rod 24, claws 26 having an inclined portion 26a in the middle are rotatably supported by pins 27, while the lower frame body 28 A recess 29 is formed on the lower surface of the holder, and claws 26 are inserted through each end of the holder.

The threaded rod 24 passing through the lower frame body 28 has a threaded shaft drop-off prevention ring 23 provided at its lower part.
is located within the recess 29 of the lower frame 28. In this configuration, first, the movement of the left half pawl 26 in FIG. 3 will be explained. The impact wrench head 22 is rotated by an impact wrench operated by a manipulator, and the upper frame body 25 is
When lowered, the inner side of the inclined portion 26a of the claw 26 simply contacts the upper corner X of the upper mounting member B, so as the upper frame 25 descends, the claw is expanded in the direction shown by the arrow. Then, the claw 26 is separated from the bottom of the lower mounting member A, and the lower mounting member A and the upper mounting member B can be unfastened. Next, as shown in the right half of FIG. 3, when closing the claw 26, when the upper frame 25 is raised upward, the claw 26 as a whole always swings in the direction of the arrow with the pin 27 as the center of gravity due to its gravity. The claw 26 is always in contact with the upper corner Y of the upper mounting member B in the closing direction, and the rotational moment is always applied in the direction of the arrow.
acts in the direction of the arrow and grips the bottom of the lower mounting member A. In addition, since stoppers 30 are provided at both ends of the lower frame 28, when the claws 26 do not rotate inward due to their own weight when the claws 26 close, the inner side of the stoppers 30 moves in the direction of closing the claws 26. It has a pushing effect.

In this way, in the present invention, the upper mounting member B and the lower mounting member A are connected only by rotation of the threaded rod 24, so that the tightening force at the time of connection can be freely adjusted and reliable tightening can be achieved. becomes possible.

Further, to explain in more detail, in the present invention, the threaded rod 24
As the upper frame body 25 moves upward with the rotation of Engage with the lower surface of A, and then the upper frame 2
5, the lower mounting member A of the claw 26 is pulled up.
The series of operations of engagement with the lower surface of the lower mounting member A and subsequent upward pulling of the lower mounting member A is achieved only by rotating the threaded rod 24, so the operation is simple.
And it's certain. Such operations and effects can also be achieved by simply rotating the threaded rod 24 in the opposite direction when removing the lower mounting member A, as shown in the left half of FIG. 3.

As described above, according to the present invention, the tube can be quickly and easily attached and detached by remote control, and its structure is also extremely simple. Furthermore, the fixed pipe 7 and the removable pipe 17 may be configured to communicate directly, or the upper mounting member B may be connected as shown in FIG.
When the and lower mounting member A are combined, hole 1 therein.
8 and 19 may match and communicate with the detachable pipe 17 and fixed pipe 7 at a certain angle, respectively.

The pipe joint 11 according to the present invention is particularly effective when used in a piping line for transporting slurry. Therefore, when having a large number of pipes as shown in FIGS. 1 and 2, it is not necessary for all the pipe fittings 11 to have this structure, and it is also possible to use them in combination with pipe fittings having other structures. Obviously it can be done.

[Brief explanation of the drawing]

Fig. 1 is a front view schematically showing the towers and tanks, Fig. 2 is a plan view thereof, Fig. 3 is a front view showing the structure of the pipe joint according to the present invention, Fig. 4 is a side view thereof, and Fig. 5 is a plan view thereof. FIG. 5 is a side view showing the other side of the piping shown in FIG. 4; 1... tower tank main body, 3... removable mount, 5... fixed mount,
7, 14... Fixed piping, 10, 15... Support, 1
1, 12, 16...Pipe fitting, 17...Detachable piping, 21
...Tightening mechanism, 22...Impact wrench mounting head, 23...Screw shaft fall prevention ring, 24...Threaded rod, 25...Upper frame, 26...Claw, 27...Pin, 2
8... Lower frame body, A... Lower mounting member, B... Upper mounting member.

Claims (1)

[Scope of utility model registration request] It consists of an upper mounting member with fixed piping, a lower mounting member with fixed piping, and a tightening mechanism, and a threaded rod rotatably attached to the lower frame body, with claws at both ends that can be rotated in the vertical direction. A tightening mechanism is constructed by screwing together the upper frame bodies that have been attached as shown in FIG. The structure of the pipe joint is characterized by: