JPS5940006A - Inner clamping device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention is a V-welding process in which two pipes are butted together and circumferentially welded.
The shape 1i1[j (A'
, and clamp from the inside 1, and the butt part inner surface σ)
The present invention relates to an inner clamp device that is capable of backing the entire circumference without any gaps and is also capable of 0J auxiliary joining to form a slight angle.

Conventionally, when joining two steel pipes together by punching them together to make the circumference l'4/÷, it is common to fix them together at the joint using both MI W k inner clamp devices.
Such a conventional inner Franz installation F4. In the case of K, there is a slight angle (
(For example, within 6 degrees) It is not possible to perform the new method of joining in a metal-like manner. Therefore, when performing auxiliary welding such as -t (7), it is necessary to use Franz from the outside1, and when Kuhnoff is performed from the outside, an automatic welding eyelid is placed on the outside of the steel pipe. It is difficult to perform circumferential movement welding because ζ is not possible.

Also, the circumference of two steel pipes is 1? ; 414-4-
Naturally, a bead is formed on &L in Le jpJ II, but this dark bead F is formed.71. In cases where it is used, a shrine is generally used as a urato. This 1 is used for the purpose of completely preventing the formation of pores or side holes due to atmospheric exposure on the back side of the first layer bead, the occurrence of defects in the bead 1, and the occurrence of burn-through. In order to fully achieve this goal,
Q? It is necessary to back the entire circumference of the inner curve of the butt part of if without any gaps. On the other hand, in the past, the length was approximately equal to the circumference of the bronze medal. However, it was extremely difficult to line the entire circumference of the steel pipe without any gaps, and the work was extremely similar.

Invention I2 This was made in view of such a medium-immersed VC, and in order to butt and circumferentially weld pipes such as IIN 'fM', it is necessary to clamp one steel pipe from the inside at the joint. - In the case where the abutted pipes have a slight angle to each other's axes, ifc cut and assist = i ii J function, and -U4 is applied to the entire circumference of the inner curve of the abutting part of the butt pipes. Inner clamp device f&, which performs all backing without one guess and also makes it easy to automate it.
k Dd is provided.

The present invention will be described in detail below with reference to Figures ii and i showing all its embodiments. Figure 1 shows an inner clamp device according to the present invention.
(hereinafter referred to as the present invention device f)&) is partially and completely broken away, and Figure 2 is a partial and complete cutaway of the wooden invention neck with -jjt5 broken fQi. Shown on the surface
t (n, l1 side view.

1 is a central base whose diameter is a little smaller than the inner diameter of the chopsticks P to which it is applied, 2 is another central base whose diameter is the same as that of the chopsticks P, and both have a ball and a handle. 111
On each side of each central base 1, 2 there are two identical spherical lateral discs 3.3 having diameters smaller than the outer diameter of the central bases 1, 2, respectively. Each central base 1
．． 1 cow fJ is placed opposite to 2 at the required interval,
1. Tenon Yonoholt with six equal parts 4.4...
・Dfl! The entire framework has been constructed. The outer cover 1 covers from all around the space between the medium base plate 1 and the side disks 3 facing it, and between the central base plate 2 and the side disks 37 facing it.
5.15 was taken and one was taken.

A ball joint convex it is provided in a groove provided inwardly on the joint outer ring part 1b protruding from the opposing central base 2 side of the center & plate l.
1 member 1d is fitted inside, while the cylindrical ball joint inner plate 1 part shrine 2b protruding from the central base 1 side of the central base 2,
A ball joint convex member 2d having a convex surface having the same curvature as the concave surface of the concave member 1d has an outer straightness 1, and the concave member 1d and the convex member 2d are engaged to form the central bases 1, 2.
is bendable.

Head guide cylinders 1a + 2a are provided in the central portions of the central bases 1 and 2 mentioned above so as to protrude toward the side disks 3 and 3, each having a large opening therebetween. Inside the head guide cylinder 1av2a, a single-acting hydraulic cylinder cylinder,
The bottomed cylindrical bodies 5b, 5b, which are the tips of the heads 5, 5, which are attached to the tips of the rams 6, are inserted into the sliding rjj function.

In addition to the bottomed cylindrical bodies 5b, 5b, the spatulas F5, 5 have a pair of plate-like members with through holes that face the VC flat surface of the ram of the hydraulic cylinder 6.6. '(1 set of 6111 bearing lugs 5 equally spaced on the outer periphery of a set of bearing lugs 5
a, 5 a-5aQ 1. 1, and the ball joint inner ring part 2b is identified as the inner bottom of the ball joint 12e, and the inner bottom of the ball joint 2b is identified, and the inner bottom of the ball joint 12e is identified, and the bottomed cylinder is Body 51), 51) in each part -
d'T, lj1n), I.

The return spring 7.7 is in position, and the ram of the hydraulic cylinder 6.6 is in the forward position. Hera F5.5
When the spring moves forward, its return spring 7.7 is compressed, and when the ram retracts, the head 5.5 moves back due to the elastic force of the return spring 7.7. It is designed to help you.

@ t4 mentioned above <heads 5, set on the outer periphery of 5)]
.

Between the bearing ears 5a, 5a...5a of each set, there is a
(Link element 8 with a 'A,' jea hole)
．． 8...8 1 @ dog dog, and in that state, from the through hole of the one force bearing 5a + 5a... 5a through the through hole of link element 8° 8...8 ( 111 Bearing ear 5; L, 5; Bin 9 to the through hole of l-5a
．． 9... 9 places, 1 city street, link element 8, 8°, 8 is in the middle [mouth receiving ear 5 a + 5 a...
・It is freely rotatable and repeatedly attacks 5a. The other end of the twisted link element 8.8...8 it's n:i
Production cover 15,150rJJ Opening 11 openings 15a + 15a = 15a Fc I
Horseshoe-shaped clamp fittings 11.1l-=l1 both legs 11a, 11a are inserted so that the Ii portion is at the position 11q.
... 113 Neo L1 inserted between the legs 11a,
lla... From the through hole of lla to the link element 8,
8...shellfish of 8)...the other leg 11a+11a through the hole
...Insert the bottle 10°1010 to the through hole of lla 1J
Link element 8.8... from 1 τ to v
8 and a clamp fitting 11 are rotatably connected.

Thus, heads 5, 5 and link elements 8, 8...
8 and clamp fittings 11, 11...11 constitute a link mechanism, and are hydraulic cylinders.

The forward and backward movements of the heads 5, 5 driven by 6iC are as follows:
It is transmitted to the clamp fittings 11.11...11 through the links 8, 8...8, and the clamp fittings 11.
11°.11 moves forward and backward in the radial direction, and moves in and out of the openings 15a, 15a, . . . 15a.

- Also, the clamp fitting l Eco L on the side of the central base 2 [Yotsushiko, which is clear from Fig. 3 showing the side perspective view, the clamp 2/clamp 11. :, 1! K is”
IJQ'! ++311a+11a -11a center side end face VC% Rectangular slip H, Q> guide plate ii
b, tib...llb is the central group) opening 25 of the dish ν2
The guide plates 1111, 111)...llb are inserted into the gap between the central bases 1 and 20 facing each other, and the clamp metal fittings and the crank metal fittings extend in the circumferential direction. On the other hand, half of the clamp fittings 11, 11, .
llb...llb is inserted through the opening (15<not shown) of the central base 1 and extends into the gap between the pair of central bases 1 and 2, and the guide plates 11b, llb, ...llb extended Keno 1. 2 clamp fittings and other clamp fittings are arranged alternately in the jl-j circumferential direction. History VC medium firepower (guidance plates 11b, llb on theft 1 side...clamp with extended llb <1. In the position facing the tool, guide plates 11b, 11b on the central base 2 side...・Since the clamp fittings without extending llb are installed, the guide plates 11b, 11L+...clamp fittings with separately installed llb are different from those on the central base 1 side and those on the central base 2 side. They are arranged alternately in the circumferential direction.

In the sliding grooves of the guide plates 11b, 11b...llb, there are ball joints 12a, 12a-12a'f! at one end of the pushbuttons 12, 12-12. : Use Ren! V-shaped sliding fittings 12b, 12b...12b is a steel pipe P,
11 is slidably engaged in the longitudinal direction of P. "In addition, each metal fitting 12c+12c...・12c
Two guide angles 113, 13, . . . 13 are attached to each side of the push ballasts 12, 12, . . . , 12 in parallel therewith. Note that the center side strut of the guide corner rod 13.13'13 is free. Cough guide angle JpP13,
13-] Guide tool 13a for guiding 3.

13a...13a are housed on both sides of the opening (not shown) of the center base 1 or the opening 250 of the medium heat base 2, and the outer circumferential sides are inclined toward the opposing center &Bill+7. Each guide square rod 13, 13, . . . 13 is guided by the guide groove. In addition, on the outer surface of the separated body parts (= J metal fittings 12c, 12c...
...14a are attached respectively. Since the copper backing 14 and the vicinity thereof are configured as follows, when the ram of the hydraulic cylinder 6.6 advances (or retracts), the clamp fittings 11, 11... (or in the centripetal direction), and according to the movement, the sliding fitting 12b,
12b...12b is the guide board 11b, llb...ll
Move to the central base 01lI (or hydraulic cylinder side) facing along the sliding groove b, and slide the sliding fitting 12b.
, 12b... Push #13, one end of which was repeatedly hit by 12b,
13...13 move in the centrifugal direction (or centripetal direction), and as a result, each segmented body 14a, 14a...14a advances in the radial direction (me retreats), and the outer cover 15.15
A divided body 14a that moves in and out of the opening 15a + 15a...15aK and interlocks with the opening 15a,
14a are spaced apart from each other.

The divided bodies 14a + 14a...14a are made of cylindrical copper material. As mentioned above, the guide plates 11b, 1], b...ll
B is divided into the same number of extending lamp fittings 11, 11...11, that is, six, and is divided so that the shape developed in the circumferential direction is a trapezoid or a triangle (in this example, a trapezoid). By arranging each member alternately in opposite directions, the hypotenuses of the trapezoid or triangle are adjacent to each other.
・Both the expanded view of 14a and the 4th [:&l (a) (
+) As is clear from I, 6
By retracting the ram 71i and retracting the head s, 5-2, the clamping fittings 11.11...11? *It is immersed into the cliff radial gyrus, and along with this, the divided body 14a + 14a ・14
When the outer peripheral surface of a is kept in the shape of 1k and suspended in the radial direction (Fig. 3 (a)), K is (11 adjacent part ■) 1 rest 14a + 14a... 14a is an arrow mark C, Qi'm move in the direction of mutual self-limitation on the slope as if by 1fft. 4).By advancing the ram of the pressure cylinder 6.6 and moving the head 5.5 forward,
Clamp fittings 11.11...11' (protrude in the z radial direction through link elements 8.8°...8,
When the divided bodies 14a, 14a...14a are kept curved toward the outer periphery and protruded in the radial direction (
In FIG. 3(b)), the divided bodies 14a+14a...14
As shown by Yahyaku Shoji, the bows move in the direction of approaching each other along the slope, so in this case as well, the center line corresponding to There is no gap above the dot-dashed line).

In addition, at appropriate positions u'1' of the central base 1,
There are three screw holes arranged at three equal intervals, and three Allen bolts 16, 16.16 are inserted into the 11414 holes, respectively.
j, jli÷! are combined. Set it ＾ Boruto l
6, l 6, 1 ii gold, the tip of which is the central base 2
Tighten with a wrench extending 11 degrees from the shell hole provided on the outer cover 15 until you hit A, and then tighten the welding hole 4' until it hits A. The state of deafness is determined by adjusting the angle between the axes of the left and right crank 7 devices f'4 according to the abutting angle of 'd'X.

゛Also, on the side disk 3.3, there is a ``7-
La 17, 17...17 are respectively attached to La no 1 and 卦υ,
These are used to move the device of the present invention through the copper tube and to perform its movement in a manner similar to that of the present invention.

As mentioned above, composition formula No. 1. The device of the present invention operates as follows after use. Figures 1 and 2 ml
The present invention aperture KL in l'f P + P, ? By charging the device 1 of the present invention and moving it without using the running rollers 17.
), move it 1 fi't below the butt part. In the movement process, for example, punishment 'i' + I
' Even if P is curved, zero origin, light device 1
Since the clamping part on one side and the copper pipe I'' on the other side are tightly connected to the ramping part and all the bending parts, it is easy to easily connect the bent part of the steel 9P. After the device of the present invention is moved so that its center is located at the force F of the butt H+S L, the pressure is 1 pressure, 6 t('I°!1j13). , the entire ram is tapped out, and the tip of the head is moved forward 5 degrees.
, 5 is transmitted to the clamp fittings 11.11...
Let's project 11 in the radial direction, the butt of P and P - pit
Clamp it from Uchiroha with it8L near-Iga IC. Kotl
, and at the same time, tJil's Kuranori project and 11.11.11
ii + Jl @ V ↓ 1゛♂ji' (jijl Backing money 14 in the radial direction '\Fu, butt n' 01ζ1
．． The inner awe is performed, but the tonality allowance 14 is the 77 mentioned above.
1J (Zonoti) Expand the diameter σtl without causing a 13:1 gap between t' and Chengdu tA.

Therefore, the device of the present invention is difficult to use.If P + P is in contact with the circumference at the wing base, clamp it from the inside with both sides of the joint width of T1゛ abutted against each other. ) with) i-The entire circumference of the butt part 101 1c j, it is possible to do 5t ”a -c frr in one moment, and 2
ru. Moreover, since the central base 1 on one side and the central base 2 on the other side are connected at their centers r:l', vL, the bending angle iiJ fj and Q are connected, so that the center base 2 is connected to the center base 2 on the other hand.
, It is also possible to move 7 and some angles in the mutual axial direction of I'.

As stated above and in 7, in accordance with the present invention, when using 11"'+odd- to bring back Nio's 'tU' and make contact with ra, one part has a goo 4 kunnumbu and the other part has a kurunf. A facing material consisting of a combination of uJ+sano and bL/)) which is bent and connected to J skewer, and is divided in the circumferential direction so that it is in contact with the phase lL in a four-ring shape. , so that the surface light appears and disappears in the radial direction. Since it is made of MI'7, /, L -fi 1il
I'm sure I'll be able to figure it out soon.
I'1. lll force direction clay angle support to make -+
! : It is also possible to use 11), etc., and the present invention is extremely effective in the case where two pistons meet and touch the circumference f6 f: 44i':
This is what we provide.

4.1 I)ij Jl-Naru 1 Sheet Figure 1 shows a part of the device I: # of the present invention cut away (7) λJ scrap top view, Figure 2 shows -ES busy fracture. 1 of 11
Figure 3 is a perspective view showing warts near the side of the clamp fitting in the device of the present invention, and Figure 4 (aJ (b) is a diagram of the present invention). Figure 1F1-G shows the copper backing metal in the device 1.

1, 2-...Naka-ri! Near,';(t&,l d
... Pitch type Fr 14 songs r', ts 梠', 2d"'
K Ai, ten convex 1111? tlS vJ, :3. :
3 ”'4dllI7y k'4Jli-1-5, 5-
-Head, (1,6...Year 1j upper cylinder, 11.
Book 11 - 11... Clamp fittings, 8, 8... 8.
...link element, 14...ft (lil, 9
tL tohuang, 14a, 14a ... 14a - fragment.

Claims (1)

[Claims] l. When welding the end surfaces of two pipes together,
An inner clamp device for clamping both tubes from the inside in the vicinity of their abutting portions, characterized in that a portion for clamping one tube and a portion for clamping the other tube are connected in a bendable manner. 2. When welding the ends of two pipes together,
When both pipes are clamped from the inside near the abutting part, the part where one pipe is clamped and the part where the other pipe is clamped are The bendably connected backing material J~, Inner IJ, is composed of a plurality of wedge-shaped annular segments divided in the circumferential direction so as to be in contact with each other, and adjacent annular segments are supported by each of the above-mentioned parts. and further, each annular segment is movable in the axial direction and the radial direction.