JPH0724715Y2 - Free Angle Deformed Tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a free angle deformed pipe.

2. Description of the Related Art Conventionally, when forming a curved conduit, a plurality of types of deformed pipes having different curved shapes are prepared in advance, and an appropriately curved deformed pipe is selected, or a combination of different curved shapes is used. The required curved shape was formed.

However, according to the conventional configuration described above, in order to form an arbitrary curved shape, it is necessary to increase the number of types of deformed pipes to be prepared, which causes a cost increase. was there.

The present invention solves the above problems, and an object thereof is to provide a free-angle deformed tube that can be formed into an arbitrary curved shape.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention bends at a predetermined first angle and has a tubular joint pipe including both ends and a predetermined second angle.
Is bent at an angle of 1 and is rotatably connected to both ends of the joint pipe around the axis, and is provided with a pair of tubular curved pipes including the connection points, and at the connecting portion between each curved pipe and the joint pipe. , Showing the connection position relationship between the curved pipe and the joint pipe around the axis, and connecting the curved pipe and the joint pipe so that they are at the same display position, the side not connected to the joint pipe in each curved pipe A bending angle marker is provided so that the axes of the two are in the same plane and the bending angle of the display angle is obtained.

Action In the above-mentioned configuration, a free bend angle can be obtained by connecting curved pipes to both ends of the joint pipe and relatively rotating the joint pipe and the curved pipe. Thereby, the free angle deformed pipe can be easily set to a predetermined bending angle.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1, a free angle deformed pipe according to an embodiment of the present invention includes one joint pipe 1 having a tubular shape including both ends,
It is connected to both ends of the joint pipe 1 and is composed of two curved pipes 2 and 3 having a tubular shape including the connecting points. The joint pipe 1 is bent at the central portion so that the inclination angle α of the pipe axis on the other end side with respect to the pipe axis on the one end side is 45 degrees, and both ends serve as receiving ports 4. Each of the bent pipes 2 and 3 is bent so that the inclination angle β of the pipe axis on the other end side with respect to the pipe axis on the one end side becomes 22.5 degrees, and both end portions on the connection side to the joint pipe 1 are bent. The curved pipes 2 and 3 are inserted into the receiving ports 4 of the joint pipes 1, but the other ends of the curved pipes 2 and 3 are one of the curved pipes 2 and 5 of the other curved pipe 3, respectively. It is said that. An annular receiving groove 4a is formed on the inner peripheral surface of the receiving port 4 in the joint pipe 1, and a lock ring 7 having a tapered portion on the opening side for preventing slipping is fitted into the receiving groove 4a. A backup ring 8 having a taper portion that abuts the taper portion of the lock ring 7 is provided at the opening side of the lock ring 7. Joint pipe 1
An annular packing 9 is provided at the opening side portion of the backup ring 8 between the receiving port 4 and the insertion ports 5 of the curved tubes 2 and 3. A flange portion 4b is formed in the receiving port 4 of the joint pipe 1, and a pair (see FIGS. 2 (a) and 2 (b)) connected to the flange portion 4b through a plurality of bolts 10 has an annular shape. The packing 9 is pressed into the gap between the receiving port 4 and the insertion port 5 by the pressing portion 11a of the push wheel 11 and is press-fitted, whereby the gap is sealed. Here, as shown in FIGS. 2 (a) and 2 (b), a plurality of bending angle markers 12 are provided on the side surface of the push wheel 11 near the inner circumference along with a number from 0 to 10 every half circle along with a number of 90. It is provided on the circumference and curved pipes 2, 3
The bending angle marker 13 is provided only at one location facing the bending angle marker 12 in FIG.

In the above configuration, the joint pipes 1 and the curved pipes 2 and 3 are connected to each other, the bolts 10 are loosened and the packing pipes 9 are not pressed so much by the push ring 11, and the curved pipes 2 and 3 are connected to the joint pipe 1. When rotated, the bending angle of the deformed tube as a whole can be changed within the range of 0 to 90 degrees. For example, 0 of push wheel 11
When one of the bending angle markers 12 indicated by is rotated and fixed to a position where the bending angle markers 13 of the bending tubes 2 and 3 meet, as shown in FIG. Direction and the bending direction of the joint pipe 1 are opposite to each other, and the pipe axis a of the curved pipe 2
And the tube axis b of the curved tube 3 coincide (that is, the inclination angle becomes 0 degree). Further, when one of them is rotated and fixed to a position where the bending angle marker 13 of the curved tubes 2 and 3 is fitted to the bending angle marker 12 indicated by 90 of the push wheel 11, as shown in FIG. 3 (b), The curved pipes 2 and 3 and the joint pipe 1 are bent to the same side, and the bending angle between the pipe axis c of the bend pipe 2 and the pipe axis d of the bend pipe 3 becomes 90 degrees. Further, by rotating one of the bending angle markers 13 of the bending tubes 2 and 3 so as to fit with each bending angle marker 12 of the push ring 11, and fixing the bending angle markers 13 to the bending angle of both bending tubes. The bending angle of the tube axis is a few. In this way, the desired bending angle can be obtained as a whole of the deformed tube only by matching the desired bending angle marker 12 of the push wheel 11 with the bending angle marker 13 of the bent tubes 2 and 3. In addition, by rotating the joint pipe 1 with one of the curved pipes 2 and 3 fixed,
It is also possible to change the bend angle without changing the tube axis position of the fixed side bent tube.

Further, FIG. 4 shows another embodiment of the present invention, in which the same functions as those of the previous embodiment are designated by the same reference numerals and the description thereof is omitted. Also in this embodiment, a free-angle deformed pipe is constructed from the joint pipe 1 and the curved pipes 2 and 3 having the same bending angle. An annular receiving groove is formed on the inner peripheral surface of the receiving port 4 of the connecting pipe 1 and the outer peripheral surface of the inserting port 5 of the bending pipes 2 and 3 facing the connecting pipe 1 and the bending pipes 2 and 3, respectively. 4a and annular slot
5a are formed, and these receiving groove 4a and insertion groove 5a
A ring-shaped expandable and contractible lock ring 21 is arranged across
It is designed to be fixed by a fixing bolt 22. Reference numeral 23 is a bolt cap that protects the fixing bolt 22. With such a structure, the same operation and effect as those of the previous embodiment can be obtained.

The bending angles of the joint pipe and the bent pipe are not limited to those in the above-described embodiment, and by setting a larger bending angle, it is possible to obtain a free angle deformed pipe in which a wide range of bending angles can be selected. Further, both ends of the curved tubes 2 and 3 which are connected to other tubes may be sockets or sockets.

As described above, according to the present invention, a free bending angle can be obtained by fixing one joint pipe and a pair of curved pipes by rotating them relative to each other about the axis so as to align the bending angle markers. In addition, since both ends of the joint pipe and the connection portion of the curved pipe are also formed into a tubular shape to obtain a desired bending angle by rotating around each other about the axis, the lock ring or packing used for the connection portion is Existing products can be used, and the passage cross-section area is constant, including the connection points of the pipes, and the passage cross-section area may change and the flow passage resistance may increase as in the case of having a spherical structure. It can be manufactured inexpensively as well.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a free angle deformed pipe showing an embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are AA of FIG. 1, respectively.
FIG. 3 is a sectional view for explaining the action of the same free-angle deformed pipe, and FIG. 4 is another embodiment of the present invention. It is sectional drawing of the free angle deformed pipe shown. 1 ... Joint pipe, 2, 3 ... Curved pipe, 4 ... Receptacle, 5 ... Insert, 9 ... Packing, 11 ... Push ring, 12, 13 ... Bending angle marker.

Claims (1)

[Scope of utility model registration request] 1. A tubular joint pipe bent at a predetermined first angle and including both ends thereof, and bent at a predetermined second angle so as to be rotatable at both ends of the joint pipe about an axis. Connected,
It is equipped with a pair of tubular curved pipes including the connecting points, and shows the connection position relationship between the curved pipes and the joint pipes around the axial center at the connection part between each curved pipe and the joint pipes, and the same display position is displayed. By connecting each curved pipe and the joint pipe in such a manner, the bending angle marker that makes the posture in which the axes of the curved pipes on the side not connected to the joint pipe have the bending angle of the displayed angle in the same plane Free angle deformed tube with