JPH0632712U - Flange pipe - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To enable a flange to be firmly and accurately fixed to the end of the pipe body in a detachable manner. [Structure] When the pipe body 2 is too long and the flange 40 does not exactly fit the abutting surface thereof, the flanges 40 fixed to both ends of the pipe body 2 are removed from the pipe body 2 and the pipe body 2 is appropriately replaced. After cutting, the length of the pipe body 2 is adjusted, and then the flanges 40 are fixed to both ends of the pipe body 2. In this fixing, first, the convex fitting portion 46a of the flange is fitted to the inner peripheral surface of the end portion of the pipe body 2,
The engagement end surface 46b of the flange 46 is brought into contact with the cut end surface of the pipe body 2. Further, the taper ring 48 and the male taper ring 50 are fitted to the end of the outer peripheral surface of the pipe body 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flange pipe having flange portions at both ends.

[0002]

[Prior art]

 This type of flange pipe is shipped to the user with the flange portion welded to both ends of the pipe having a predetermined size at the factory. Further, in Japanese Patent Laid-Open No. 59-159488, there is provided an escape preventing ring in which a large number of circumferential grooves are provided on a pipe, and a circumferential projection is provided on the inner periphery of the pipe and a part of the ring is cut off. After enlarging and deforming it and covering its circumferential projections with the circumferential groove of the pipe, hold this escape prevention ring from the outer periphery by the receiving part of the pipe joint body and prevent axial movement. By doing so, a pipe and a pipe joint in which the pipe joint body and the pipe are connected to each other are disclosed. Further, Japanese Utility Model Laid-Open No. 58-65489 discloses a fiber reinforced resin pipe in which an iron plate is fixed to a resin pipe by bolts.

[0003]

[Problems to be solved by the device]

 As described above, if the flange portions are fixed to both ends of the pipe by welding, when the user installs the flange pipe, the blange portion may not be correctly fitted to the attachment side due to an assembly error. In that case, the length of the flange pipe could not be easily adjusted, which was extremely inconvenient.

Further, in a structure in which a pipe is provided with a large number of circumferential grooves and the pipe joint main body is connected to the pipe, it is not easy to process the circumferential groove, and the pipe is cut into an arbitrary length, When connecting the pipe joint body to the pipe, the circumferential groove was cut at an arbitrary position, so there was a defect that the positional relationship between the end of the ring and the pipe joint body was not constant. In addition, in the configuration in which the outer peripheral portion of the iron plate is tightened with bolts and the iron plate is fixed to the resin pipe, an unbalanced load is applied to the outer peripheral portion of the iron plate. Existed. The present invention aims to eliminate the above defects.

[0005]

[Means for solving problems]

 To achieve the above object, the present invention provides a pipe main body 2, a convex fitting portion 46a that fits on the inner peripheral surface of the pipe main body 2, and a locking end surface 46b that abuts the end portion of the pipe main body 2. And a flange 46 having a screw hole 54 axially provided therethrough, a taper ring 48 slidably fitted on the outer peripheral surface of the pipe body 2, and a taper ring 48 fitted in the taper ring 48 in the axial direction. The male taper ring 50 is provided with a bolt insertion hole 52 corresponding to the screw hole 54, and the fixing bolt 14.

[0006]

[Action]

 If the flange 4 does not exactly fit the abutting surface, remove one flange 4 from the pipe main body 2, cut the pipe main body 2 appropriately, adjust the length of the pipe main body 2, and after that, The flange 4 is fixed to the end of the pipe body 2. In this fixing, first, the convex fitting portion 46a of the flange is fitted to the inner peripheral surface of the end portion of the pipe body 2, and the locking end surface 46b of the flange 46 is brought into contact with the cut end surface of the pipe body 2. Further, the taper ring 48 and the male taper ring 50 are fitted to the end portion of the outer peripheral surface of the pipe body 2.

Next, the bolt 14 is inserted from the bolt insertion hole 52, the bolt is screwed into the screw hole 54 of the flange 46, and the male taper ring 50 is pulled toward the flange 46. The flange 46 is firmly fixed to the pipe body 2 by the sandwiching force between 48 and the outer peripheral surface of the convex fitting portion 46a. By loosening the bolt 14 with respect to the screw hole 54, the fixing between the pipe body 2 and the flange 46 can be released.

[0008]

【Example】

 Hereinafter, the configuration of the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. Reference numeral 46 denotes high-rigidity flanges arranged at both ends of the pipe body 2, and has a cylindrical convex fitting portion 46a. A plurality of bolt screw holes 54 are axially formed in the plate-like portion 46c of the flange 46 in the axial direction. The plate-like portion 46c is provided with a locking end surface 46b for contacting the end portion of the pipe body 2. Reference numeral 48 denotes a taper ring which has a tapered surface on its outer peripheral surface and which can be freely reduced in diameter, and whose inner peripheral surface is slidably fitted on the outer peripheral surface of the pipe body 2.

Reference numeral 50 denotes a male taper ring, in which a bolt insertion hole 52 is formed in the axial direction corresponding to the screw hole 54. A taper surface is formed on the inner diameter of the male taper ring 50. The inner taper ring 30 abuts on a locking surface 28a of the circumferential groove 28 which is perpendicular to the axial direction, and the outer taper ring 36 faces a ring-shaped spacer 38 arranged in the circumferential groove 28. ing.

In the above configuration, the outer peripheral surface of the convex fitting portion 46a of the flange 40 is fitted to the inner peripheral surface of the pipe body 2, while the locking end surface 46b is brought into contact with the end surface of the pipe body 2. Next, the taper ring 48 and the male taper ring 50 are slidably fitted and arranged on the outer peripheral surface of the end portion of the pipe body 2.

Next, the bolt 14 is screwed into the screw hole 54 of the plate-shaped portion 46c from the bolt insertion hole 52 of the male taper ring 50, and the male taper ring 50 is moved to the right in the figure, that is, the plate-shaped portion 46c. When pulled in the direction of, the taper ring 48 contracts in diameter, and the pipe body 2 is pinched by the taper ring 48 and the outer peripheral surface of the convex fitting portion 46a. It is firmly fixed to the end of. This fixing can be released by loosening the bolt 14 with respect to the screw hole 54.

[0012]

【effect】

 According to the present invention, as described above, the convex fitting on the flange side is tightly fitted to the inner peripheral surface of the pipe body, and the locking end surface of the flange and the end surface of the pipe body are in contact with each other. Since the flange is fixed, there is an effect that both can be fixed accurately and firmly.

[Brief description of drawings]

 The drawing is a sectional view showing a preferred embodiment of the present invention.

[Explanation of symbols]

 2 Pipe main body 14 Bolt 46 Flange 46a Convex fitting part 46b Locking end face 48 Taper ring 50 Male taper ring 52 Bolt insertion hole

Claims (1)

[Scope of utility model registration request] 1. A pipe main body (2), a convex fitting portion (46a) fitted to an inner peripheral surface of the pipe main body (2), and a locking end surface abutting on an end portion of the pipe main body (2). (46b)
And a flange (46) having a threaded hole (54) provided through in the axial direction, a taper ring (48) slidably fitted on the outer peripheral surface of the pipe body (2), and the taper ring (48). ) And is axially threaded (54)
A flanged pipe comprising a male taper ring (50) having a bolt insertion hole (52) provided therethrough and a fixing bolt (14).