WO2015151584A1

WO2015151584A1 - Pipe joint for use in narrow spaces

Info

Publication number: WO2015151584A1
Application number: PCT/JP2015/053471
Authority: WO
Inventors: 泰章谷口
Original assignee: ニッタ株式会社
Priority date: 2014-04-03
Filing date: 2015-02-09
Publication date: 2015-10-08
Also published as: JP2015197195A; CN105829787A

Abstract

A pipe joint for use in narrow spaces is provided, with which joints, such as elbow and tee joints, which have the radial direction from the screwing central axis as the largest dimension thereof, can be attached to the device side, in places where the gap between pipes is narrow, without performing any special processing and without using any special tools. This pipe joint is divided into two members, namely a pipe connection member (2) and a screw member (1). The screw member (1) is configured such that a socket for a socket wrench is fitted and screwed to a hexagonal part. The screw member (1) and the pipe connection member (2) can be made to engage with each other by just inserting a stem part (17) of the screw member (1) into the pipe connection member (2). The pipe connection member (2) is capable of rotating with respect to the central axis of the screw member (1).

Description

Narrow pipe fittings

Embodiment of this invention is related with the joint for narrow places piping attached to the apparatus with a narrow space | interval of piping.

管 Pipe joints with threads need to be rotated entirely in order to attach them to equipment. Among joints, fittings with shapes that change the direction of piping such as elbows and tees have the largest radial dimension from the center axis of the screw. It can be difficult. For this reason, it is possible to perform processing that does not require screwing on the equipment side or use special tools. (For example, Patent Document 1)

FIG. 7 is a view showing a state in which the conventional joint 40 is attached to the device 3. The pipe connecting member 21 is a part on the tube insertion port side. A parallel male screw 23 is processed on the screw member 22, and a sealing material 24 and a sealing material 25 are arranged, and are connected to the pipe connection member 21 by

edges

26 a and 26 b. The sealing material 24 maintains the sealing performance between the device 3 and the joint 40. The sealing material 25 maintains the sealing performance between the screw member 22 and the resin main body 27. Therefore, the joint 40 and the device 3 are attached by screwing the parallel male screw 23 on the screw member 22 side and the parallel female screw 12b on the device 3 side, and the sealing material 24 keeps the sealing performance.

8A and 8B are diagrams in the case where the conventional joint 40 is attached to a device 28 having a narrow pipe-to-pipe distance P using a spanner 29, FIG. 8A is a plan view, and FIG. 8B is a perspective view. The joint 40a, the joint 40b, and the joint 40c are joints having the same size and shape, and the spanner 29 is of a general size. Even if the

screw member

22a, 22b, 22c of each of the

joints

40a, 40b, 40c is attached to the attachment hole of the device 28, the opposite side H of the hexagonal portion of the screw member 22a is sandwiched and rotated by the spanner 29, The resin main body of the joint 40a interferes with the joint 40b. Moreover, since the outer side of the spanner 29 interferes with the adjacent screw member 22b, it is difficult to rotate and attach the joint 40a.

Similarly, even if an attempt is made to sandwich and rotate the opposite side H of the hexagonal portion of the screw member 22b with the spanner 29, the resin body of the joint 40b interferes with the

joints

40a and 40c. Further, since the outside of the spanner 29 interferes with the

adjacent screw members

22b and 22c, it is difficult to rotate and attach the joint 40b. Similarly, even if an attempt is made to sandwich and rotate the opposite side H of the hexagonal portion of the screw member 22c with the spanner 29, the resin body of the joint 40b interferes with the joint 40c. Further, since the outside of the spanner 29 interferes with the adjacent screw member 22b, it is difficult to rotate and attach the joint 40c.

JP 2004-197881 A

The problem to be solved by the present invention is to provide a narrow pipe joint that can be installed in a place where the interval between the pipes is narrow without performing special processing on the equipment side or using a special tool. To do.

In order to achieve the above object, the joint for narrow pipes of the embodiment has a maximum dimension in the radial direction from the central axis of the stem part inner diameter of the pipe connecting member, and a maximum dimension in the radial direction of the hexagonal part from the central axis of the screw of the screw member. A pipe joint for a larger narrow pipe, comprising a pipe connecting member and a screw member, the screw member being a hexagonal portion for tightening with a tool, and a screw portion for screwing into a mounting hole of the device, A groove portion formed in the stem portion of the pipe connecting member is locked to the locking member in a state in which the locking member is included inside and the screw member is screwed and connected to the mounting hole of the device. It is characterized by that.

According to the joint for narrow pipes of the embodiment, pipes and pipes that have a large maximum dimension in the radial direction from the center axis of the screw, such as elbows and tees, are used without special processing or using special tools on the equipment side. It can be installed even in places where the interval is narrow.

The figure which shows the state which attaches the screw member of one Embodiment of this application to an apparatus, and engages a pipe connection member. The figure which shows a locking ring. The partial cross section figure of a locking ring. The figure which shows the state which attached the screw member of one Embodiment of this application with narrow piping. The figure which shows the state which attached the screw member of one Embodiment of this application with narrow piping. The figure which shows the state which attached the screw member to the apparatus in one Embodiment of this application, and engaged the piping connection member. The figure which shows the process of the transition of the state of a locking ring and a stem until a screw member engages with a piping connection member. The figure which shows the process of the transition of the state of a locking ring and a stem until a screw member engages with a piping connection member. The figure which shows the state of a locking ring and a stem when a screw member is engaged with the piping connection member. The figure which shows the state which engaged the piping connection member and screw member which made the piping connection part the bamboo shoot shape. The figure which shows the state which attached the conventional coupling to the apparatus. The interference figure at the time of attaching the conventional joint with narrow piping. The interference figure at the time of attaching the conventional joint with narrow piping.

Embodiments of the present invention will be described below with reference to the drawings.
(Embodiment 1)
The joint for narrow pipes according to the embodiment of the present invention includes a pair of a screw member 1 and a pipe connection member 2. FIG. 1 shows a cross-sectional view of a state before the pipe connection member 2 is engaged with the screw member 1 attached to a device 3 (for example, an air brake valve).

The screw member 1 includes a screw member main body 4, a sealing material 5, a sealing material 6, a pipe locking ring 7, a locking ring holding member 8, a backup ring 9, and a snap ring 10.

Here, the screw member main body 4 has a hexagonal portion 11 for tightening to the device 3, a parallel male screw portion 12a to be screwed onto the device 3, and a hole portion 11a. Further, a sealing material 6 for the pipe connection member 2, a pipe locking ring 7, a locking ring holding member 8, a backup ring 9 of the locking ring 7, and a snap ring 10 are arranged in the hole 11a inside. is doing. A sealing material 5 with the device 3 is disposed on the outer corner of the screw member main body 4.

The sealing material 5 is formed of an elastic body such as rubber and is compressed by the device 3 and the screw member main body 4 to maintain the sealing performance of the screw member 1 and the device 3.

The sealing material 6 is formed of an elastic body such as rubber, and is compressed by the stem 13 of the pipe connecting member 2 and the screw member main body 4 at a place where the screw member main body 4 and the locking ring holding member 8 are formed. 1 and the pipe connection member 2 are kept sealed.

The locking ring holding member 8 restricts the sealing performance of the sealing material 6 and the fixing and shifting of the locking ring 7. FIG. 2A is a view of the locking ring 7 as viewed from the axial direction, and FIG. 2B is a partial cross-sectional view of the locking ring 7. The locking ring 7 is an annular member (disc spring) having a claw 70 that holds the stem 13 of the pipe connecting member 2 and having spring properties.

The backup ring 9 presses the locking ring holding member 8 and fits one side of the locking ring 7. The snap ring 10 fixes the backup ring 9.

On the other hand, the pipe connecting member 2 includes a resin main body 14 and a sealing material 15, a backup ring 16, a locking ring 17, a locking ring holding member 18, and a release 19. The resin main body 14 is formed with an insertion stem 13 having a groove 20 for locking and fixing to the locking ring 7 of the screw member main body 4. Here, although the pipe connection member 2 is L-shaped, it may be T-shaped or Y-shaped.

The sealing material 15 is formed of an elastic body such as rubber and is compressed by a tube (not shown) and the resin main body 14 to maintain the sealing performance of the tube and the pipe connecting member 2. The backup ring 16 presses the sealing material 15 from the side of the locking ring holding member 18 and fits one side of the locking ring 17. The locking ring holding member 18 is press-fitted into the resin main body 14 so as to hold down the backup ring 16 and is tightly fixed to the side wall of the resin main body 14. The release 19 is inserted into the locking ring holding member 18 and moves toward the backup ring 16 in the axial direction of the pipe connection member 2. The diameter of the locking ring 17 can be increased by pressing from the locking ring holding member 18 side, and the tube can be removed.

Inside the hole 3a into which the screw member 1 of the device 3 is screwed, a female screw 12b having the same size as the parallel male screw 12a of the screw member body 4 is processed, and the sealing material 5 is deformed at the corner of the hole 3a. The chamfered portion 60 is provided.

The screw member 1 and the device 3 are joined by screwing the parallel male screw 12a and the parallel female screw 12b, and the sealing material 5 keeps the sealing performance.

Next, the attachment operation | work of the coupling for narrow places piping which has said structure is demonstrated.
FIG. 3 is a diagram illustrating a state in which the screw member 1a, the screw member 1b, and the screw member 1c are attached to the screw member 1a, the screw member 1b, and the screw member 1c by using a spanner 29 and a socket wrench socket 30. 3A is a plan view and FIG. 3B is a perspective view. In FIG. 3B, it has shown in the state which cut | disconnected a part so that the fitting state with the screw member 1c can be confirmed.

The screw member 1a, the screw member 1b, and the screw member 1c have the same size and shape. The spanner 29 has a general size, and the socket wrench socket 30 also has a general size and shape. Even if the screw member 1a is rotated and attached in the state where the screw member 1b is attached, the outside of the spanner 29 interferes with the screw member 1b, and attachment is difficult. However, the socket wrench socket 30 is formed by forming a hexagonal or dodecagonal female mold inside a cylindrical shape. The sum of the cylindrical radius d and the maximum dimension f in the radial direction of the hexagonal portion from the center axis of the screw of the screw member 1b is smaller than the distance P between the pipes (P> (d + f)), and the gap m is smaller. If possible, the screw member 1c can be attached even when the adjacent screw member 1b is attached by fitting the socket 30 to the hexagonal portion 11c of the screw member 1c and rotating it with a ratchet handle or the like. Thus, the

screw members

1a, 1b, and 1c are first screwed into the mounting holes of the device 28 and fixed.

FIG. 4 shows a state where the stem 13 of the pipe connecting member 2 is inserted and held after the screw member 1 is attached to the device 3. The sealing material 6 is deformed in accordance with the outer diameter of the stem 13 and maintains the sealing performance of the screw member 1 and the pipe connecting member 2. As described above, after the screw member 1 is attached to the device 3, the pipe connection member 2 is pushed into the hole 11a from the upper part of the screw member 1, thereby easily connecting the screw member 1 and the pipe connection member 2 even in a narrow space. can do.

FIG. 5 shows the transition of the state of the locking ring 7 and the stem 13 until the screw member main body 4 and the pipe connecting member 2 are inserted and held. FIG. 5A shows a state before the stem 13 presses the claw 70 of the locking ring 7. FIG. 5B shows a state where the stem 13 presses the claw 70 and expands the locking ring 7, and shows a state before the claw 70 is locked with the groove 20 of the stem 13. FIG. 5C shows a state where the claw 70 is engaged with the groove 20 of the stem 13.

When the stem 13 of the pipe connecting member 2 is inserted into the hole 11a of the screw member body 4, the sealing material 6 is pushed by the outer diameter of the stem 13 and deformed (for example, the cross section is deformed from a circular shape to a vertically long ellipse), Pass through the retaining ring holding member 8. And the nail | claw 70 of the latching ring 7 is expanded by the front-end | tip of the stem 13, and it inserts. Then, as shown in FIG. 5C, the claw 70 of the locking ring 7 is locked in the groove 20 of the stem 13, so that the stem 13 of the pipe connection member 2 is fixed to the screw member main body 4.

That is, since the diameter of the groove 20 formed in the stem 13 is smaller than the outer diameter of the stem 13, the inner diameter of the locking ring 7 in FIG. 5C is smaller than the inner diameter of the locking ring 7 in FIG. 5B. In this way, the stem 13 expands the diameter of the locking ring 7, and is inserted into the groove 20 of the stem 13 until the claw 70 of the locking ring 7 is hooked, and is locked to engage the screw member 1 and the pipe connection member 2. Let Even if a force to remove the pipe connection member 2 is applied in this state, the claw 70 is locked to the groove 20 and cannot be removed.

(Embodiment 2)
Next, the second embodiment will be described focusing on the differences from the first embodiment.
FIG. 6 is a diagram illustrating a state in which the screw member 1 is attached to the device 3 and the pipe connection member 31 is inserted into the screw member 1. The pipe connection portion 32 of the pipe connection member 31 has a bamboo shoot shape. The mountain diameter of the bamboo shoot shape pipe connection portion 32 is larger than the inner diameter of the tube, and when the tube is inserted into the pipe connection portion 32, the diameter of the tube is increased. Thus, the sealing performance is maintained. Other screw members 1 and equipment 3 are the same as those in the first embodiment. Although it is inferior in operability at the time of piping as compared with the first embodiment, the number of parts is small and the weight is light. If the stem 13 and the stem 33 of the first embodiment and the second embodiment have the same dimensions, the same screw member 1 can be used.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Screw member 5 Elastic body for sealing a screw member and an apparatus 6 Sealing material between a pipe connection member and a screw member 7 Stem engagement locking ring 11 Hexagonal portion 12a of a screw member Parallel male screw 12b of a screw member Parallel female screw 13 Stem 20 for engagement with screw member Groove 27 for locking ring engagement processed in stem 13 Resin body 30 of device 4 Socket 31 for socket wrench Pipe connection member 32 of embodiment 2 Bamboo child-shaped pipe connection part 50 Triangular groove formed by the taper of the entrance of the device and the screw member 60 Taper P of the entrance of the device P Distance between the pipe and pipe H Opposite side of the hexagonal portion d Cylindrical radius of the socket for socket wrench f Hexagonal portion from the central axis of the screw of the screw member Maximum dimension in the radial direction of the gap between the hexagonal part and socket for socket wrench

Claims

A pipe joint for narrow pipes in which the maximum dimension in the radial direction from the central axis of the stem part of the pipe connection member is larger than the maximum dimension in the radial direction of the hexagonal part from the central axis of the screw of the screw member,
It consists of two members, a pipe connection member and a screw member.
The screw member has a hexagonal portion for tightening with a tool, a screw portion for screwing into a mounting hole of the device, and a locking member inside,
In a state where the screw member is screwed and connected to the mounting hole of the device, a groove portion formed in the stem portion of the pipe connection member is locked to the locking member, Fittings.
The narrow pipe joint according to claim 1, wherein a locking ring having a claw for holding a piping tube is accommodated in an inner peripheral portion of the piping connecting member, and the tube is held by the locking ring.
The narrow pipe joint according to claim 1, wherein the pipe connecting member has a bamboo shoot-shaped cylinder into which the pipe is press-fitted.