JPH11141768A - Flange connecting structure connected or separated by remote control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reliability of operation by making it easy to check the joining structure of flanges joined or separated by remote control. SOLUTION: In a structure of a pair of flanges joined or separated by remote control, a nut assembly 30 is constituted by nut-receiving members 27, 29, which are secured to the back surface of one flange 23 in correspondence with a plurality of fastening bolt holes and whose inserting openings protrude outward in the radial direction from the outer periphery of the flange 23, and a plurality of nuts arranged in fastening bolt holes and connected to each other via a frame to which a grip part 39 is connected protruding outward in the radial direction from the outer periphery of the flange 23 at the position separated from the nut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining flange structure for connecting piping and the like, and more particularly to a fastening structure for a flange which is separated or joined by remote control.

[0002]

2. Description of the Related Art A joining flange used for connecting pipes of a plant installed in an atmosphere where humans cannot easily access or separating pipes is used to facilitate handling by remote control. The structure as shown in FIGS. 6 and 7 is employed. In brief, the joining flanges 1 and 3 connected to a pipe (not shown) are fastened by fastening bolts 5 and nuts 7. Fastening bolt hole 9
In general, at least three nuts are provided at equal circumferential intervals, and the nut receiver is attached so as to face in one direction, particularly as shown in FIG. The nut 7 is generally a small part,
Since it is difficult to hold with the manipulator for remote operation,
In particular, as shown in FIG. 8 independently, they are connected and integrated by a U-shaped molding rod 13 and are gripped by a gripping rod 15. Then, the nut assembly 10 gripped by the gripping rod 15 is inserted into the nut receiver 11 as shown in FIG. 6, and the fastening bolt 5 gripped by another manipulator hand is inserted and screwed.
Reference numeral 17 denotes a gasket, reference numeral 18 denotes a guide pin for aligning both flanges 1 and 3, and reference numeral 19 denotes a washer.

[0003]

In the work of grasping the above-mentioned nut assembly 10 and fastening the joining flange by remote control, observation is made with a monitoring camera or the like. However, when viewed from the insertion direction of the fastening bolt, the nut receiver is behind the flange 3 and cannot be seen. Therefore, the operator has to attach the nut assembly 10 by the feeling of a skilled manipulator operator, resulting in poor work efficiency. Therefore, an object of the present invention is to provide a flange fastening structure in which the fastening nut can be observed even by remote operation, and the fastening operation can be reliably performed.

[0004]

According to the present invention, in order to solve the above-mentioned problems, according to the present invention, a fastening structure of a pair of joining flanges which are separated or connected by remote control is provided with a plurality of fastening bolts on the back surface of one of the flanges. An insertion opening of a nut receiver fixed corresponding to the hole projects radially outward from the outer peripheral edge of the flange, and a plurality of nuts arranged in alignment with the fastening bolt hole are mutually connected via a frame. A gripping portion that is connected and protrudes radially outward from an outer peripheral end of the flange at a position away from the nut is connected to the frame.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. The same parts are denoted by the same reference numerals throughout the drawings. First, referring to FIGS. 1 and 2, the flange 21 on the bolt side is for receiving a pipe or the like (not shown) in the inner diameter portion. A pin hole 21b is also provided. The nut-side flange 23 facing the flange 21 via a gasket (not shown) is also provided with three fastening bolt holes 23a aligned with the fastening bolt holes 21a. Further, a pin mounting hole is formed at a position corresponding to the alignment pin hole 21b, and the base end of the guide pin 25 is inserted and fixed in the hole. The guide pin 25 is connected to both flanges 2.
The guide 21 guides the flanges 21 when connecting them, and facilitates alignment. Then, on the back surface of the flange 23, FIG.
Are mounted at predetermined intervals. The nut receivers 27 and 29 have a symmetric shape, and have holder parts 27a and 29a and guide parts 27b and 29b, respectively. Further, the guide portions 27b, 29
When the nut receivers 27 and 29 are attached to the flange 23 as shown in FIG. 1, b protrudes radially outward from the flange 23.

The nut assembly 30 inserted and mounted in the nut receivers 27 and 29 as described above is shown in FIGS.
The structure is as shown in the figure. That is, the weld nuts 33, 35, and 37 are attached to the inverted U-shaped frame, that is, the arm 31, corresponding to the arrangement of the fastening bolt holes. Further, a holding portion 39 is attached to the arm 31 so as to protrude. The weld nuts 33, 35, 37 are screwed with fastening bolts 26 extending through the fastening bolt holes 21a, 23a, respectively, and a tall washer 28 is provided between the head of the fastening bolt 26 and the surface of the flange 21. Interposed.

[0007] In order to remotely join the flanges 21 and 23 having the above-described configuration, the flanges 21 and 23 are respectively gripped using a manipulator or the like, and the two are aligned using the guide pins 25. Thereafter, the grip portion 39 of the nut assembly 30 is gripped, and the tip of the arm 31 is inserted between the nut receivers 27 and 29 and pushed. Thereafter, the head of the fastening bolt 26 is grasped, the one washer 28 is grasped, the fastening bolt 26 is inserted as shown in the drawing, and inserted into the fastening bolt holes 21a, 23a. , 37 and screwed together. If it is turned until an appropriate torque is reached, the fastening is completed. Such remote control is performed while observing through a surveillance camera (not shown) that projects the back surface of the bolt side flange 21.

[0008]

As described above, according to the present invention,
Since the insertion end of the nut receiver protrudes outside the flange, all operation target parts can be observed by a surveillance camera directed to the back of the bolt side flange, so the separation and connection of the joint flange by remote operation is easy. Can be done.

[Brief description of the drawings]

FIG. 1 is a rear view of an embodiment according to the present invention.

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

FIG. 3 is a layout view showing a main part of the embodiment in a separated manner.

FIG. 4 is a plan view showing components of the embodiment in a separated manner.

FIG. 5 is a side view corresponding to FIG.

FIG. 6 is a rear view of a conventional device.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a plan view showing a part of a conventional device separated.

[Explanation of symbols]

 21 Flange 21a Fastening bolt hole 21b Guide pin hole 23 Flange 23a Fastening bolt hole 25 Guide pin 26 Fastening bolt 27,29 Nut receiver 27a, 29a Holder 27b, 29b Guide 28 Washer 30 Nut assembly 31 Arm 33,35,37 Weld nut 39 Gripping part

Claims (1)

[Claims] In a structure of a pair of joining flanges separated or joined by remote control, an insertion opening of a nut receiver fixed to a back surface of one of the flanges corresponding to a plurality of fastening bolt holes is provided on an outer peripheral edge of the flange. A plurality of nuts projecting radially outward from the outer peripheral end of the flange at a position apart from the nut are connected to each other via a frame, and are arranged in alignment with the fastening bolt holes. A fastening structure for a flange that is remotely connected and detached, the holding portion protruding in a direction being connected to the frame.