JPH1047566A - Connection tightening device for pipe shape member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an installation workability by providing and constituting a tightening device for combining pipe shape members mutually, with a base plate provided with a comparatively large hole for penetrating a ring shape flange, a contact support member provided with a wedge groove for receiving a faced ring shape flanges together, a push-contact adjustment member and a drop prevention member. SOLUTION: A clamp device 40 as a combination tightening device has a closed horseshoe shape base plate 41 and a long circle shape hole 43 capable of inserting a hollow guide column 3 and a connection pipe 7 is formed in its center part. A fixed finger 45, which is a contact support member, is installed at intervals of 120 deg. and a wedge groove 49 for receiving a pair of flanges 5 is formed on an arc tip end 45a positioned in the long circle hole 43 of respective fingers 45. A moving finger 51 is installed as a push-contact adjustment member. For combination time of a pair of flanges 5, the moving finger 51 is advanced by screwing a push bolt 57 and both flanges 5 are tightened severely in the wedge groove 49 and thereafter, a stopper 61, which is a drop prevention member, is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening device for joining tubular members in a watertight manner.

[0002]

2. Description of the Related Art In order to join tubular members, an outward flange is formed at one end of the tubular member, and a fastening bolt is inserted into a bolt hole of two butted flanges in the axial direction of the tubular member and tightened. However, the tightening direction of the bolt is also in the tube axis direction, so that the workability of the tightening may be poor. FIGS. 4 and 5 show examples in which the fastening direction of the fastening bolt is orthogonal to the tube axis. In this method, a thermocouple for detecting the temperature inside the pressurized water reactor is led out of the reactor vessel. The hollow guide column 3 having the female flange 1 and the connecting pipe 7 having the male flange 5 are connected to each other. It is fastened by the Merman clamp 9. The back surface of the female flange 1 and the back surface of the male flange 5 are each formed in a frusto-conical shape, and cooperate to form a wedge-shaped cross section. A gasket 11 is provided between the female flange 1 and the male flange 5.
, And sealing is performed. The Merman clamp 9 is formed of an arc-shaped portion having a wedge groove for receiving the female flange 1 and the male flange 5 together on the inner peripheral surface thereof, and the fastening flanges 13 at both ends. 17, the hollow guide column 3 and the connection pipe 7 are securely fastened. In this fastening clamp structure, three fastening bolts 15 to be individually fastened are used. Therefore, in order to make the degree of fastening between the female flange 1 and the male flange 5 uniform in the circumferential direction, each fastening bolt 15 is used. Use a tool such as a torque wrench so that the same tightening torque can be obtained with

FIGS. 6, 7 and 8 show a method for improving the efficiency of the tightening operation of a tightening bolt. As can be seen particularly in FIG. 7, three clamps 21 each having an arc length of approximately one-fourth are connected at both ends by a connecting plate 23, and a clamp 25 having a similar shape is connected to an adjacent clamp 21. The connecting plate 23 and the eyebolt 27 are connected to each other, and are connected in an annular shape as shown in the figure. A nut 29 is screwed into the eyebolt 27, and the nut 2
9 is tightened and the clamps 21 and 25 and the joint plate 2
The annular clamp consisting of 3 narrows. In this way, the wedge groove surface 31 of the inner peripheral surface of the clamp fittings 21 and 25 is pressed against the wedge surface formed by the female flange 1 and the male flange 5, and the hollow guide column 3 and the connection pipe 7 are fastened. In FIG. 8, reference numeral 33 denotes a joint plate 23 and clamps 21 and 25.
Are pivotally connected to each other.

[0004]

SUMMARY OF THE INVENTION As described above, 3
In the case of using the multiple Merman clamps 9 (FIGS. 4 and 5), since there are three tightening points as described above, it takes time for the tightening operation, and the time between the female flange 1 and the male flange 5 is increased. In order to obtain uniform joining in the circumferential direction, it is necessary to strictly control the tightening torque with a torque wrench or the like, and the work may be complicated. Further, in the case of using the four clamps shown in FIGS. 6 to 8, the operation is simplified since only one tightening portion is used. Is not a unified movement because each component can rotate around a large number of support pins. Therefore, it is basically impossible to obtain a uniform circumferential connection between the female flange 1 and the male flange 5. Was difficult. Further, in any of the above structures,
If the nut screwed into the tightening bolt or the eyebolt is loosened, the entire device may be detached from the tubular member or fall. Accordingly, the present invention provides a joining and fastening device for a tubular member which can easily perform a fastening operation, can obtain a uniform joining force over the entire periphery of the joining portion, and furthermore is always prevented from dropping. As an issue.

[0005]

According to the present invention, in order to solve the above problems, according to the present invention, a tubular member joining and fastening apparatus for joining tubular members having an annular flange at one end thereof is provided with an annular flange. A base plate having a relatively large hole, a contact support member having a wedge groove fixed to the base plate and having a tip portion projecting into the hole and receiving both of the opposed annular flanges together; A push-adjustment member provided at its leading end with a wedge groove provided so as to advance or retreat toward the center of the hole and receiving both of the opposed annular flanges together, and the periphery of the hole in the base plate And a fall prevention member engaged with the annular flange.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Referring to FIGS. 1 to 3,
The hollow guide column 3 to be joined and the connecting pipe 7 are shown by two-dot chain lines, and the female flange 1 and the male flange 5 are opposed to each other with the gasket 11 interposed therebetween. The joint fastening device or clamp device 40 has a base plate 41 having an outer shape similar to a closed horseshoe, and an oval hole 43 large enough to pass the hollow guide column 3 and the connection pipe 7 at the center thereof. Is formed. The contact support member or fixed finger 45 is substantially 12
It is inserted into the base plate 41 at circumferential intervals of 0 degrees and fixed with fixing bolts 47. As is apparent from FIG. 2, the arc-shaped tip 45 a located in the oval hole 43 receives the female flange 1 and the male flange 5 together, and has a back surface formed into a truncated conical surface. Is formed.

A pressing adjustment member, ie, a moving finger 51 is provided on the base plate 41 at a circumferential interval of about 120 degrees with respect to each of the two fixed fingers 45. As is apparent from FIGS. 1 and 2, the outer shape of the moving finger 51 is basically similar in shape to the fixed finger 45 except that the moving finger 51 has a large length, but the guide pin fixed to the base plate 41 is used. 5
3 is different from the fixed finger 45 in that it has two rows of guide slots 55 to be fitted into the respective slots 3. And base plate 4
The wedge groove 59 of the distal end portion 51a is formed by the long adjustment bolt or push bolt 57 screwed into the female flange 1 and the male flange 5.
Is in contact with the back surface of the truncated cone. Accordingly, the push bolt 57 is turned to move the moving finger 51 closer to each of the flanges 1 and 5, and the wedge groove 59 is pressed against these frusto-conical back surfaces. Further push bolt 5
By turning the knob 7, the fixed finger 45 on the substantially opposite side of the female flange 1 and the male flange 5 is drawn, and the wedge groove 49 of the fixed finger 45 and the wedge groove 59 of the movable finger 51 cooperate. Therefore, they are gripped tightly. Thus, the female flange 1 and the male flange 5 are pressed against each other in the axial direction, and the gasket 11 is compressed. That is, the hollow guide column 3 and the connection pipe 7 are joined and fastened. Further, as shown in FIGS. 1 and 3,
In the vicinity of the side of the oval hole 43, a fall prevention member or stopper 61 is fixed to the base plate 41 by tightening two bolts.

In order to join the female flange 1 and the male flange 5 by using the clamp device 40 having the above-described configuration, first, the stopper 61 is not attached, and the moving finger 51 is fully retracted. 41 is passed through the hollow guide column 3 and the connection pipe 7 and set at a position surrounding the female flange 1 and the male flange 5. Then, as the push bolt 57 is turned, the moving finger 51 moves forward toward the female flange 1 and the male flange 5 as described above, and the distal end portion 51a comes into contact with them as described above. Tighten tightly. Thereafter, the two stoppers 61 are fixed to the respective mounting positions by bolting. In the above embodiment, two fixed fingers 45 are used.
The tip 47a has an appropriate arc length and the moving fingers 51
By arranging them facing each other, one unit may be used. However, it is preferable to arrange as described above for an appropriate distribution of the fastening force. Further, depending on the mounting posture, a stopper having a groove for receiving the female flange 1 and the male flange 5 may be used.

[0009]

As described above, according to the present invention, 1
Since only the pressing adjustment members are used, only the pressing force needs to be adjusted, so that the time required for attaching the joining and tightening device to the tubular member can be greatly reduced. Further, since the drop prevention member is provided, the detachment and drop of the joint fastening device can be effectively prevented even if the push-contact adjusting member is loosened.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view of a conventional clamp unit.

FIG. 5 is a plan view taken along the line VV of FIG. 4;

FIG. 6 is a sectional view of another conventional clamp portion.

FIG. 7 is a plan view of the clamp of FIG. 6;

FIG. 8 is a side view corresponding to FIG. 7;

[Explanation of symbols]

 1 Female Flange 3 Hollow Guide Column 5 Male Flange 7 Connection Pipe 11 Gasket 40 Clamping Device 41 Base Plate 43 Oval Hole 45 Fixed Finger 45a Tip 47 Fixing Bolt 49 Wedge Groove 51 Moving Finger 51a Tip 53 Guide Pin 55 Guide Slot 57 Push bolt 59 Wedge groove 61 Stopper

Claims (1)

[Claims] 1. A base plate having a relatively large hole through which said annular flange passes, said annular flange being fixed to said base plate and being in contact with each other, wherein said tubular flange has a tubular member provided with an annular flange at one end. A contact support member provided with a wedge groove at a tip end protruding into the hole to receive both of them together, the annular plate being provided on the base plate so as to advance or retreat toward the center of the hole, A tubular member comprising: a push-adjustment member having a wedge groove at a tip portion for receiving both of the flanges together; and a fall prevention member fixed to a periphery of the hole and engaged with the annular flange. Joint fastening device.