JP3118509U - Twin swivel joint structure - Google Patents

Abstract

An object of the present invention is to provide a compact twin swivel joint capable of transferring two kinds of fluids around a shaft in the same direction in a direction rotated by a desired angle.
An inner diameter larger than the outer diameter of the inner pipe is provided in the inner pipe in the double pipe structure of the outer pipe and an inner pipe having an end projecting from the outer pipe. The first swivel pipe 7 having the side pipe 4 provided on the side surface is externally fitted, and one end of the first swivel pipe 7 is connected to the inner peripheral surface of the outer pipe 2 via a ball bearing 8. The inner end of the inner tube 3 is reduced in diameter so that the inner diameter of the inner tube 3 is reduced, and the outer end of the inner tube 3 is rotated outside in a state of being in contact with the ball bearing 9. The twin swivel joint is formed by fitting the end of the second swivel pipe 24 to the end of the inner pipe 3 via ball bearings 25 and 26 so as to be rotatable.
[Selection] Figure 1

Description

    The present invention relates to the structure of a twin swivel joint.

For example, as described in Patent Document 1, the swivel joint is widely used in oil lubrication pipe devices and other various fields.
However, the conventional swivel joint is generally provided with one rotatable swivel pipe with respect to one fixed pipe.
For this reason, for example, even when two different types of liquids are rotated around the same axis and transferred, it is common to use a separate swivel joint for each fluid, and the installation location can be changed to a plurality of them. Needed a space to install a swivel joint.
No. 7-9839

  In view of the present situation, the present invention is capable of transferring two types of fluids around the same axis in a direction rotated by a desired angle, and is compact and has a large space as an installation place. An object is to provide a twin swivel joint that is not required.

The above-mentioned problems are solved by a device having the following configuration, as shown in each claim in the scope of utility model registration claims.
(1) The inner tube in the base tube having a double-pipe structure comprising an outer tube and an inner tube protruding from the outer tube has an inner diameter larger than the outer diameter of the inner tube, The entire first swivel pipe provided with the side pipe is externally fitted, and is rotatable in a state where one end of the first swivel pipe is in contact with the inner peripheral surface of the outer pipe via a ball bearing. It is fitted inside, the inner diameter of the other end is reduced, and the outer circumference of the inner tube is rotatably fitted in a state of contact with the outer circumference via a ball bearing, and at the end of the inner tube, One end of the second swivel pipe is a twin swivel joint that is rotatably fitted via a ball bearing.

  (2) One end of the first swivel pipe is pivotally fitted to the first base pipe via a ball bearing so that the end of the first swivel pipe can be rotated or fitted to the first swivel pipe, and the outer diameter of the first swivel pipe is larger than the outer diameter of the first swivel pipe. One end of a second swivel tube having a second inner tube having a large inner diameter and having an inner diameter larger than the outer diameter of the first swivel tube and having a side tube on the side. Is a twin swivel joint that is rotatably fitted via a ball bearing and the other end is rotatably fitted to the first swivel pipe.

According to the present invention, the following effects can be achieved.
According to the first or second aspect of the invention, two types of fluid can be transferred around the same axis in the direction rotated by a desired angle, and the rotation axis is common. For this reason, the twin swivel joint can be made compact, and it does not require a large space for installation.

  FIG. 1 is a longitudinal sectional view of a first embodiment of a twin swivel joint of the present invention.

  The fixed base pipe (1) has a double pipe structure of an outer pipe (2) and an inner pipe (3), and the inner pipe (3) projects forward from the outer pipe (2). ing. An inlet side pipe (4) is provided on the side of the outer pipe (2).

  Two kinds of fluids A and B are supplied from the inlet (5) of the inner pipe (3) and the inlet (6) of the inlet side pipe (4), respectively.

  The first swivel pipe (7) has an inner diameter larger than the outer diameter of the inner pipe (3), and is entirely fitted on the inner pipe (3). One end of the first swivel pipe (7) has an inner peripheral surface ( 2a) through a ball bearing (8) and is rotatable, the inner diameter of the other end is reduced, and a ball bearing (9) is formed on the outer peripheral surface (3a) of the inner tube (3). ) And can be rotated.

  The ball bearing (8) includes an annular groove (10) provided on the outer peripheral surface (7a) of the first swivel pipe (7) and an outer pipe in the base pipe (1) facing the annular groove (10). It is disposed in an annular hole (12) formed by both annular grooves (10), (11) of the annular groove (11) provided on the inner peripheral surface (2a) of (2).

  At an appropriate position of the annular hole (12), an inlet (2b) communicating with the outside of the outer pipe (2) is provided, and the ball bearing (8) is inserted into the annular hole (12) from the inlet (2b). It is arranged. The insertion port (2b) is closed by a plug as a closing member (13).

  Similarly, ball bearings (9) are also provided on the inner peripheral surface (7b) at the reduced diameter end of the first swivel tube (7) and on the outer peripheral surface (3a) of the inner tube (3), respectively. It is disposed in an annular hole (16) comprising annular grooves (14) (15).

  An insertion port (17) communicating with the outside of the first swivel pipe (7) is provided at an appropriate position of the annular hole (16), and the ball bearing (9) is connected to the annular hole (16 ). The insertion port (17) is closed by a plug as a closing member (18).

  On the outer peripheral surface (7a) of the first swivel pipe (7) in the vicinity of both ball bearings (8) and (9) and the outer peripheral surface (3a) of the inner pipe (3), respectively, there are annular grooves (19) and (20). O-rings (21) and (22) are arranged in the annular grooves (19) and (20), respectively.

  These O-rings (21) and (22) have grease injected into the annular holes (12) and (16) to reduce the surface friction of the ball bearings (8) and (9) and to make the rotation smooth. , Has a function of preventing leakage to the outside. On the side surface of the first swivel pipe (7), an outlet side pipe (23) is provided.

  A second swivel pipe (24) is externally fitted to the end of the protruding inner pipe (3) of the base pipe (1) via ball bearings (25) and (26).

  Similarly to the above, the ball bearings (25) and (26) are annularly provided between the outer peripheral surface (3a) of the inner tube (3) and the inner peripheral surface (24a) of the second swivel tube (24). Arranged in the holes (27), (28). Both annular holes (27), (28) are respectively provided with inlets (29), (30), and both inlets (29), (30) are respectively closed by closing members (31), (32). .

  The outer peripheral surface (3a) at the end of the inner pipe (3) is reduced in diameter to form an annular step portion (33), and an annular packing (34) is disposed on the annular step portion (33). ing.

  The packing (34) has a function of preventing fluid from leaking from the inlet (5) of the inner pipe (3).

  An annular groove (35) is formed on the outer peripheral surface (3a) of the inner tube (3) opposite to the annular step (33) where the packing (34) is disposed of the ball bearings (25) and (26). An O-ring (36) is provided.

  Of the two types of fluids A and B, the fluid A supplied from the inlet (5) of the inner pipe (3) passes from the outlet (24b) of the second swivel pipe (24) to the next pipe A (37). The fluid B supplied and supplied from the inlet (6) of the inlet side pipe (4) of the first swivel pipe (7) passes from the outlet (23a) of the outlet side pipe (23) to the next pipe B ( Supplied to 38).

  Since the first swivel pipe (7) and the second swivel pipe (24) can be rotated by a desired angle around a common rotation axis, a compact twin swivel joint can be obtained, The first and second swivel pipes (7) and (24) can be easily rotated.

  FIG. 2 is a longitudinal sectional view of a second embodiment of the twin swivel joint of the present invention.

  One end of the first swivel pipe (40) is fitted into the fixed first base pipe (39) via a ball bearing (41) (42). As in the case of the first embodiment, the annular holes (43) and (44) in which the ball bearings (41) and (42) are disposed are provided with the inlets (45) and (46), and the closing member (47) Closed by a plug as (48). Also, annular grooves (49) and (50) are provided on both sides of the annular holes (43) and (44) in which the ball bearings (41) and (42) are disposed, and O-rings (51) and (52) are provided. It is arranged.

  The first base tube (39) is divided into a tube tip portion (53) into which one end of the first swivel tube (40) is fitted, and a tube body portion (54) to which the tube tip portion (53) is coupled. An annular groove (55) is also provided on the contact surface between the two, and an O-ring (56) is provided.

  A second base pipe (57) having an inner diameter larger than the outer diameter of the first swivel pipe (40) is fitted on the first swivel pipe (40).

  Similarly, one end of the second swivel pipe (58) having an inner diameter larger than the outer diameter of the first swivel pipe (40) is rotated through the ball bearing (59) in the second base pipe (57). The other end of the second swivel pipe (58) is rotatably fitted to the first swivel pipe (40) via an O-ring (60). On the side of the second swivel pipe (58), an outlet side pipe (61) is provided.

  In the second base pipe (57), the inner side of the annular hole (62) where the ball bearing (59) is disposed and the end opposite to the end where the annular hole (62) is provided The annular grooves (63) and (64) are respectively provided, and O-rings (65) and (66) are provided in both the annular holes, respectively.

  The annular hole (62) in which the ball bearing (59) is disposed is provided with an inlet (67) and is closed by a closing member (68).

  Of the two types of fluids C and D, the fluid C supplied from the inlet (39a) of the first base pipe (39) to the first swivel pipe (40) is the outlet (40a) of the first swivel pipe (40). ) From the outlet (61a) of the outlet side pipe (61) to the next pipe C (69) and supplied from the inlet (57a) of the second base pipe (57) It is supplied to the pipe D (70).

  Similar to the twin swivel joint of the first embodiment, the first swivel pipe (40) and the second swivel pipe (58) can be rotated by a desired angle around a common rotation axis. Therefore, a compact twin swivel joint can be obtained, and the first and second swivel pipes (40) and (58) can be easily rotated.

It is a longitudinal cross-sectional view of 1st Embodiment of the twin swivel joint of this invention. Similarly, it is the longitudinal cross-sectional view of 2nd Embodiment of the twin swivel joint of this invention.

Explanation of symbols

(1) Base tube
(2) Outer pipe
(2a) Inner peripheral surface
(2b) Input port
(3) Inner pipe
(3a) Outer surface
(4) Inlet side pipe
(5) (6) Entrance
(7) First swivel tube
(7a) Outer peripheral surface
(7b) Inner peripheral surface
(8) (9) Ball bearing
(10) (11) Annular groove
(12) Annular hole
(13) Closing member
(14) (15) Annular groove
(16) Annular hole
(17) Input port
(18) Closing member
(19) (20) Annular groove
(21) (22) O-ring
(23) Outlet side pipe
(23a) Exit
(24) Second swivel pipe
(24a) Inner peripheral surface
(24b) Exit
(25) (26) Ball bearing
(27) (28) Annular hole
(29) (30) Slot
(31) (32) Closing member
(33) Annular step
(34) Packing
(35) Annular groove
(36) O-ring
(37) Piping A
(38) Piping B
(39) 1st pipe
(39a) Entrance
(40) 1st swivel pipe
(40a) Exit
(41) (42) Ball bearing
(43) (44) Annular hole
(45) (46) Slot
(47) (48) Closing member
(49) (50) Annular groove
(51) (52) O-ring
(53) Tube tip
(54) Tube body
(55) Annular groove
(56) O-ring
(57) Second base tube
(57a) Entrance
(58) Second swivel tube
(59) Ball bearing
(60) O-ring
(61) Outlet side pipe
(61a) Exit
(62) Annular hole
(63) (64) Annular groove
(65) (66) O-ring
(67) Slot
(68) Closing member
(69) Piping C
(70) Piping D

Claims (2)

  The inner tube in the base tube of the double tube structure consisting of an outer tube and an inner tube protruding from the outer tube has an inner diameter larger than the outer diameter of the inner tube, and a side tube on the side surface. The entire first swivel tube is externally fitted, and one end of the first swivel tube is rotatably fitted in an inner surface of the outer tube via a ball bearing. The inner diameter of the other end is reduced, and the outer periphery of the inner tube is rotatably fitted in contact with the outer periphery of the inner tube via a ball bearing, and the second swivel is attached to the end of the inner tube. A twin swivel joint structure in which one end of a tube is rotatably fitted via a ball bearing.   One end of the first swivel tube is fitted to the first base tube so as to be rotatable or externally fitted via a ball bearing, and the inner diameter of the first swivel tube is larger than the outer diameter of the first swivel tube. A second swivel pipe having an inner diameter larger than the outer diameter of the first swivel pipe and having a side pipe on the side; A twin swivel joint structure characterized in that it is rotatably fitted through a bearing and the other end is fitted to a first swivel pipe so as to be rotatable.

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