JPH0637902Y2 - Detachment device for piping flange joints - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a device for attaching and detaching a pipe flange joint.

[Prior Art] Conventionally, the attachment and detachment of the pipe flange joint has been performed by bolt fastening, and it took a lot of time to attach and detach the pipe flange joint.

However, for example, in a nuclear facility, since there is a problem of radiation exposure, there is a limitation in the working time of one day of the worker, and it is necessary to quickly and easily carry out the attachment / detachment work of the pipe flange joint.

Therefore, as a means for quickly and easily attaching and detaching the pipe flange joint, the pipe flange joint attaching and detaching device 1 shown in FIGS. 7 to 9 has been considered.

The attachment / detachment device 1 is provided with rectangular flanges 3, 3 at the ends of two pipes 2, 2 to be attached / detached, and an upper end portion 4 and a lower end portion which are outer peripheral edge portions of the flanges 3, 3 facing each other. 5 is formed in a taper shape so as to reduce the plate thickness of the flanges 3, 3 toward the outer peripheral edge toward the outer peripheral edge, and the upper ends 4 and the lower ends 5 of the flanges 3, 3 are wedge-fitted in contact with each other. The crimp frames 7 and 8 engraved with the substantially V-shaped groove 6 are vertically arranged so as to oppose each other along the upper or lower ends of the flanges 3 and 3, and the swing links 9 are pivoted at both ends of the lower crimp frame 8. The upper end of the crimping frame 7 and the swing link 9 on both ends thereof.
A shorter pressure link 10 is pivotally attached, and the tips of the pressure link 10 and the swing link 9 are pivotally attached via pins 11.

The opening / closing unit a for operating the attachment / detachment device 1 will be described.

Two screw rods (not shown) are rotatably provided in a horizontally arranged beam b, and each screw rod is connected to a motor c via a worm (not shown) and a worm wheel.
The beam b is provided with symmetrical open / close arms d and e swingably, and the open / close arms d and e are screwed onto the respective screw rods. The opening and closing arms d and e
Bifurcated engaging claws f are provided on the lower surfaces of both ends of the engaging claw f, and the engaging claws f can be engaged with the pin 11.

Therefore, after the flanges 3 and 3 are brought into contact with each other and aligned, the pin 11 of the attachment / detachment device 1 is engaged with the engaging claw f of the opening / closing unit a to drive the motor c to move the opening / closing arms d and e to the seventh position.
Open and close the arm by tightening it in the direction of arrow A in the figure.
The rocking link 9 rises when d and e approach each other, and the crimping frames 7 and 8 move relative to the flanges 3 and 3 in the directions B approaching each other from the vertical direction, respectively, to taper the flanges 3 and 3. The upper end 4 and the lower end 5 formed in the shape of a ring are substantially V-shaped grooves 6 of the crimp frames 7 and 8.
Then, the swing link 9 and the pressure link 10 are tightened until they are piled up in an upright state as shown in FIG.
The flanges 3, 3 are firmly joined by the wedge action.

Here, as shown in FIG. 8, the swing link 9 and the pressure link 10 have such a length that the upper and lower crimping frames 7 and 8 can be completely fitted to the upper and lower end portions of the flanges 3 and 3 in a superposed state. It is formed to have a difference.

It should be noted that the above is the joining work of the flanges 3 and 3, but the detaching work may be performed by reversing the joining work.

[Problems to be Solved by the Invention] However, such a conventional attachment / detachment device 1 includes the flanges 3, 3
The bellows type expansion joint 14,1
Not suitable for 4. That is, in the case of the bellows type expansion joints 14 and 14 as shown in FIG. 9, when the flanges 3 and 3 are in a non-joined state, a gap S is generated between the flanges 3 and 3, so that the crimping frame 7 Even if the flanges 3 and 8 were sandwiched, the flanges 3 and 3 could not be guided into the substantially V-shaped groove 6 and could not be wedge-fitted.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a pipe flange joint attaching / detaching device that draws a flange in advance and then performs wedge fitting.

[Means for Solving the Problems] In the present invention, the flange of the pipe is formed in a polygonal shape, the opposite outer peripheral edge portion of the flange is tapered on the side opposite to the joint surface, and the opposite outer peripheral edge portion can be wedge-fitted. In a device for attaching and detaching a pipe flange joint capable of joining flanges by a wedge action by tightening with a pair of crimp frames, both side portions of the flange that are not wedge-fitted to the crimp frames are provided in a direction facing the crimp frames. A holding member provided with a tapered top on the side opposite to the joint surface of the end portion, and arranged to face each other so as to hold each top of each of the flanges in a drawn state, and to project toward the facing direction of the crimping frame. And a pulling mechanism including a pulling roller provided at the tip of the holding member at a position where the pulling mechanism can contact the top.

[Operation] Therefore, in the present invention, when the crimping frames are brought close to each other in the opposite direction so that the outer peripheral edge portions of the respective flanges which are opposed to each other are wedge-fitted to each other, the pulling rollers of the pulling mechanism are connected to each other before the wedge fitting. Abut the tapered end of the saw,
By pulling the top and guiding and sandwiching it between the holding members, the flanges are pulled together, and by further tightening the crimping frame, the crimping frame reliably wedge-fits the flange.

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

1 to 6 show an embodiment of the present invention, and the flanges 3 in the drawings are shown in the case of a bellows type expansion joint.
Further, in the drawings, the parts denoted by the same reference numerals as in FIGS. 7 to 9 represent the same things.

In the pipe flange joint attaching / detaching device 1'having substantially the same structure as that of FIGS. 7 to 9 described above, as shown in FIG. 1, the upper frame 15 is provided on both left and right sides of the rectangular flanges 3,3.
And the lower top 16 are provided respectively, and the upper top 15 and the lower top 16 are provided on both sides of the upper crimp frame 7 and the lower crimp frame 8, respectively.
A pulling mechanism (17) is provided at a position where the pulling mechanism (17) can contact.

As shown in FIG. 2, the upper end 15 of the upper top 15 and the lower end of the lower top 16 are meat-bonded to the upper side, and the lower top 16 is directed to the lower side. It is tapered to reduce the thickness.

Further, as shown in FIG. 3, the pulling mechanism 17 is arranged in the front-rear direction at an interval such that each of the upper tops 15 or the lower tops 16 can be pinched in a state of being pulled (shown by a chain double-dashed line in FIG. 3). The sandwiching members 18, 18 arranged in the middle left-right direction, and the sandwiching member 18
It is composed of a pulling roller 19 provided at the tip of each of the pulling rollers 19, and the pulling roller 19 is provided when the crimping frames 7 and 8 are tightened.
Is brought into contact with the anti-joining surface of the upper end of the upper top 15 or the lower end of the lower top 16 prior to the wedge fitting of the substantially V-shaped groove 6 of the crimping frames 7 and 8 with the flanges 3 and, and the front and rear holding members. The upper frame 15 or the lower frame 16 is guided between 18,18.

If it is desired to reduce the frictional force between the anti-joining surface of the flanges 3 and 3 and the side surface of the substantially V-shaped groove 6 and increase the joining force, the space between the flanges 3 and 3 and the substantially V-shaped groove 6 should be reduced. Alternatively, a roller or a ball 20 may be interposed as shown in FIG.

Further, the lower crimping frame 8 is provided with the flanges 3, 3 as shown in FIG.
A slide rod 22 is provided by a support base 21 provided below the attachment / detachment position.
Is supported through the sliding rod 22 by means of the support base.
A stopper 21a and a sliding hole 21b fixed to the upper part of the member 21 are vertically slidably inserted.

In the figure, 12 is a guide rod fixed to the upper crimping frame 7 and extending downward to slidably pass through a guide hole 8'formed in the lower crimping frame 8, and 13 is the guide rod 12 Both crimping frames 7,8
3 shows a compression coil spring fitted externally between them.

Further, the opening / closing device 23 for operating the attaching / detaching device 1'shown in FIG. 1 will be described below.

The opening / closing device 23 is provided with a guide member 25 slidably fitted in the vertical direction between guide frames 24, 24 provided upright on the upper side of the crimping frame 7 at required intervals, and is horizontally attached to the guide member 25. Bar 26
The central portion is fixed, the holding portions 27 are provided at both ends of the horizontal bar 26, and the holding portion 27 allows a male screw rod 28 having a left-right symmetrically formed reverse screw to be rotatably and horizontally held.
A reverse member U is screwed on each of the left and right ends, and can be engaged with the lower part of each of the moving members 29 from above from the pin 11 of the link mechanism.
A character-shaped engaging claw 30 is provided, and further, a guide member 32 slidably fitted to a horizontal guide 31 formed on the horizontal bar 26 is provided above the moving member 29, so that the male screw rod 28 By rotating the handle 33 attached to the one end side, the moving members 29 are configured to approach and separate from each other. The male screw rod 28 penetrates through a through hole 25 'formed in the guide member 25 with a required clearance, and the guide frame 24 has a pipe 2 above the broken line 24' in the drawing. The upper opening is bifurcated in the front-back direction of the biaxial center so as not to interfere with the vertical movement of the horizontal bar 26 and the male screw rod 28.

The operation will be described below.

When the engaging claws 30 of the opening / closing device 23 are separated from each other at a required interval and are engaged with the pins 11 of the link mechanism, and the handle 33 is rotated to bring the moving members 29 close to each other, the swing link 9 and the pressure link 10 are tightened in the direction of approaching each other, and the crimping frames 7, 8 move relative to the flanges 3, 3 in the directions of approaching each other from the vertical direction.

Here, as shown in FIG. 4, the pulling roller 19 first comes into contact with the upper end 15 of the flanges 3 and 3 and the lower end of the lower end 16 on both sides, and the upper end 15 and the lower end 16 are connected to each other as shown in FIG. As shown in (4), it is pulled and guided between the front and rear clamping members 18, 18 to clamp it. At this time, the upper end portion 4 and the lower end portion 5 of the flanges 3, 3 are reliably guided in the substantially V-shaped groove 6 in the pulled state.

In such a state, as shown in FIG. 6, when the swing link 9 and the pressure link 10 are erected in an upright state until they are overlapped, the flanges 3, 3 are firmly joined by a wedge action.

The above is the joining work of the flanges 3, 3, but the detaching work may be performed by reversing the joining work.

Therefore, according to the above, the flanges 3 and 3 can be attached and detached quickly and easily, and even if there is a gap between the flanges 3 and 3 at the time of non-joining such as a bellows type expansion joint, this pulling mechanism 17 to pull in advance and securely flange
3,3 can be wedge-fitted.

The device for attaching and detaching the pipe flange joint of the present invention is not limited to the above-described embodiment, and the flange may have a polygonal shape having opposing outer peripheral edge portions that can be tightened with a crimp frame, It is not limited to a rectangular shape, various methods for tightening the crimping frame can be adopted, the top does not have to be separately provided on the upper and lower tops, and can be integrated, and other deviations from the gist of the present invention It goes without saying that various changes can be made within the range not covered.

[Advantages of the Invention] As described above, the pipe flange joint attaching / detaching device of the present invention can exhibit various excellent effects as described below.

(I) The flange can be attached and detached quickly and easily, and the work efficiency can be improved.

(II) Even if the flanges are separated from each other, the pulling mechanism can pull the flanges and securely wedge-fit them into the crimping frame.

[Brief description of drawings]

1 is a front view of an embodiment of the present invention, FIG. 2 is a side view of the flange shown in FIG. 1, and FIG. 3 is a detailed side view of the pulling mechanism of FIG. 1, 4, and 5. FIG. 6 is an operation explanatory view of one embodiment of the present invention, FIG. 6 is a front view showing a flange joint state of one embodiment of the present invention, FIGS. 7 and 8 are front views showing a conventional example, and FIG. It is sectional drawing of the crimping frame of a prior art example. In the figure, 1'is a detachable device, 2 is a pipe, 3 is a flange, 4 is an upper end (one of the outer peripheral edges facing each other), 5 is a lower end (the other of the outer peripheral edges facing each other), and 7 and 8 are crimped. Frame, 15 is the top, 1
6 is a lower top, 17 is a drawing mechanism, 18 is a holding member, and 19 is a drawing roller.

Claims (1)

[Scope of utility model registration request] 1. A pipe flange is formed in a polygonal shape, and the outer peripheral edge portions of the flange facing each other are tapered on the side opposite to the joint surface.
In a pipe flange joint attaching / detaching device capable of joining flanges by a wedge action by tightening the opposing outer peripheral edge portions with a pair of crimp frames capable of being wedge-fitted, the flange both side portions not wedge-fitted to the crimp frames. In, the top of the end opposite to the crimping frame is provided with a taper on the side opposite to the joining surface,
Further, each of the flanges comprises a sandwiching member that is arranged to face each other so that it can be sandwiched in a pulled state, and that is projectingly provided in the opposing direction of the crimping frame, and a pulling roller provided at the tip of the sandwiching member. An apparatus for attaching and detaching a pipe flange joint, wherein a pulling mechanism is provided at a position where it can be brought into contact with the top.