JP2003028360A - Pipe joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem which demands very high precision to curvature of the spherical parts of a ball joint structure because ball joint structure which can hardly keep sealability of fluid in an universal joint part is adopted in a conventional pipe joint, and a problem which can hardly keep sealability because the spherical parts have to be made to have a gap (namely, 'play'). SOLUTION: In this pipe joint K, the position of a hole 40 can be made different by turning first connecting means R1, R2 which are provided with the hole 40 having a center shaft 41 at the position different from the center shaft 31 of a casing 80. Furthermore, second connecting means F1, F2 freely turnable relative to the hole 40 are arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for connecting pipes which are substantially parallel to each other and which are separated from each other in the pipe axis direction on the same line.

[0002]

2. Description of the Related Art Conventionally, a pipe joint has been devised for connecting pipes that are substantially parallel to each other and are separated from each other in the pipe axial direction. For example, a universal joint portion of a ball joint structure in which both ends of a pipe joint are formed into a spherical receiving member having an internal cavity and a spherical member formed so as to engage with the internal cavity portion of the receiving member are integrated. There is a pipe joint provided. Since this pipe joint has the above-mentioned structure, the pipes are connected to each other by connecting the pipes that are substantially parallel to the universal joint portion and are separated from each other in the pipe axial direction.

[0003]

However, in the above-mentioned conventional pipe joint, it is difficult to maintain the fluid sealability (waterproofness) in the universal joint portion. That is, in the case of the pipe joint, since the universal joint portion has a ball joint structure, in order to maintain the sealing property, the curvature of each spherical portion with which the receiving member and the spherical member engage is very accurately. Must match. Furthermore, since it is necessary to provide a clearance (that is, generally called "play") in the spherical surface portion so that the spherical member can freely slide with respect to the receiving member, it is even more important to maintain the sealing property. It will be difficult. Therefore, it can be said that the above-mentioned pipe joint has a problem in practical use, and cannot be used especially in a situation where a fluid having a high pressure flows. Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to connect pipes that are stable in fluid sealing property and are substantially parallel to each other and whose central axes do not match. It is to provide a pipe joint capable of

[0004]

DISCLOSURE OF THE INVENTION The present invention relates to a pipe joint for connecting pipes which are substantially parallel to each other and are separated from each other in the pipe axial direction, and which has a tubular shape and serves as a shell of a fluid passage. A hole having a central axis at a position different from the central axis of the casing, the first connecting means rotatably provided at both ends of the casing about the central axis of the casing, and the hole. And second connecting means for engaging the pipe and connecting the hole and the pipe, wherein the central axes of the first and second connecting means are parallel to the central axis of the casing. Is configured as a pipe joint. That is, when connecting pipes that are substantially parallel and separated from each other in the pipe axis direction, a pipe joint having a universal joint as in the related art is connected to the end portions of the pipes to be connected with each other. Although it was necessary to adjust the angle three-dimensionally, since the pipe joint of the present invention is configured as described above, it is only necessary to rotate the first connecting means with the central axis of the casing as the pivot axis. The second connecting means can be connected to the ends of the tubes, and the tubes can be easily connected to each other.

The second connecting means of the pipe joint of the present invention comprises:
It is desirable that the hole is slidably provided in the tube axial direction. By configuring the second connecting means as described above, the tubes are connected to each other by sliding the second connecting means in the tube axial direction according to the distance between the tips of the tubes. It becomes possible to do. Further, the second connecting means may be rotatably provided with the central axis of the hole as a pivot. By configuring the second connecting means in this way, for example, when the second connecting means and the pipe are connected by bolting, by rotating the second connecting means, the second connecting means is rotated. It becomes possible to match the position of the bolt hole of the connecting means of 2 with the position of the bolt hole of the pipe,
It becomes possible to easily tighten the bolts. Furthermore,
It is desirable that the second connecting means is provided with a retaining means so as not to be removed from the hole, and the pipe joint of the present invention is provided with such a retaining means so that, for example, at the time of pipe connection work or the like. In the above, it is possible to prevent the second connecting means from falling out of the first connecting means.

In the present invention, at both ends of the casing in which the first connecting means is provided, first water blocking means having a ring shape for preventing leakage of fluid in the casing, or It is preferable that each of the holes of the first connecting means provided with the second connecting means is provided with a second water blocking means having a ring shape for preventing leakage of fluid in the casing. According to the present invention, by providing the ring-shaped water stopping means (for example, an O-ring, a labyrinth packing, and other conventionally existing water stopping means) in the present invention on the inner surface of the tubular casing or the inner surface of the hole. It becomes possible to perform the sealing process more easily than the special sealing process (water-stopping process) of the universal joint part of the ball joint structure.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments and examples of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the following embodiments and examples are merely examples embodying the present invention and are not of the nature to limit the technical scope of the present invention. Here, FIG. 1 is a diagram showing an example of use of a pipe joint according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a pipe joint according to an embodiment of the present invention, and FIG. 3 is a pipe joint according to an embodiment of the present invention. FIG.

First, an example of use of the pipe joint according to the embodiment of the present invention will be briefly described. As shown in FIG. 1, for example, pipes H1, H2, valves B1, B2 are provided inside a machine room S in which a pump, a valve, a pipe, etc. are placed, and pipes H1 and H2 of the pipe shaft (1 It is assumed that the dashed lines) are at different positions in the vertical direction. In the case of FIG. 1, the valve B1 is provided at one end of the pipe H1, and the valve B2 is provided at one end of the pipe H2.
Since it is installed in line with the pipe axis of No. 2, valve B1 and valve B
It is impossible to directly connect the two. Therefore, by providing the pipe joint K according to the embodiment of the present invention between the valves B1 and B2, the valves B1 and B2 can be indirectly connected to each other. Of course, even if the valves B1 and B2 do not exist and the pipes H1 and H2 cannot be directly connected to each other, the pipe joint K can be used to indirectly connect them. Hereinafter, as described above, a pipe joint K that is an example of a pipe joint that is capable of interconnecting pipes that are substantially parallel to each other and are separated from each other in the pipe axial direction or a device such as a valve provided at one end of the pipe. Will be described. Also, the pipe joint K
Shall be composed of a member formed of a steel plate (for example, stainless steel) that is corrosion resistant to the fluid to be handled.

A pipe joint K, which is an example of the pipe joint according to the embodiment of the present invention, will be described with reference to FIGS. 2 (A), (B) and (C). First, FIG. 2A is a cross-sectional view of the pipe joint K viewed from the side. FIG. 2B shows the casing 80 of the pipe joint K.
The front view which looked at the 1st connection means R1 provided in one end of the from the direction of arrow A. FIG. 2C is a front view of the second connecting means F1 viewed from the direction of arrow A. As shown in FIG. 2 (A), first connecting means R1 and R2 having the same structure are provided at both ends of a casing 80 which is a shell for forming the fluid passage 10 in the pipe joint K. ing. The first
Since the connecting means R1 and R2 of 1 have the same structure, R1 will be specifically described below. As shown in FIG. 2 (B), most of the first connecting means R1 is made of a circular steel plate 30 having an outer circumference that matches the shape of the inner circumference of the end of the casing 80, and has a hole 40 inside. Are formed. This hole 40 is the central axis 3 of the casing 80.
It is formed as a hole having a central axis 41 at a different position in parallel with 1. Further, the outer circumference of the steel plate 30 and the inner circumference of the casing 80 both have a circular shape and are in contact with each other so that the first connecting means can rotate about the central axis 31 of the casing 80. ing. Since the first connecting means is formed as described above, by rotating the first connecting means R1 and R2 (in the direction of the arrow in FIG. 2B), it is shown in FIG. 2 (A). Position of the hole 40
1 and R2 can be different. For example, Figure 2
(A) shows the case where the first connecting means is rotated so that the hole 40 is downward for R1 and the hole 40 is upward for R2. In addition, on the inner circumference of the casing 80, which is in contact with the outer circumference of the steel plate 30, an O-ring having a ring shape for preventing the leakage of the fluid existing in the flow path 10, a labyrinth packing, or the like water stopping means (first stop A groove 81 for forming water means) is formed.

Next, the holes 40 of the first connecting means R1 and R2
The second connecting means F1 and F2 that are engaged with will be described.
Since the second connecting means F1 and F2 have the same structure, the F1 will be specifically described below. As shown in FIG. 2A, the second connecting means F1 is a tubular member 5 formed in a tubular shape so as to contact the inner circumference of the hole 40.
0, and a flange 60 for connecting the pipe H1, the valve B1 and the like and the tubular member 50 by bolting. The tubular member 50 is formed in a tubular shape so that the outer periphery thereof contacts the inner periphery of the hole 40, and is for guiding the fluid flowing from the pipe H1 to the flow channel 10, for example. Further, since the entire outer circumference of the tubular member 50 is formed so as to contact the inner circumference of the hole 40, the tubular member 50 has a structure capable of rotating about the central axis 41 of the hole 40.
Therefore, the flange 60 formed integrally with the tubular member 50 also rotates about the central shaft 41 (see FIG. 2).
(In the direction of the arrow in (C)). As with the inner circumference of the casing 80, the inner circumference of the hole 40 in contact with the tubular member 50 may be an O-ring, a labyrinth packing, or the like having a ring shape for preventing leakage of the fluid existing in the flow path 10. A groove 31 for forming a water stopping means (second water stopping means) is formed. On the flange 60, the pipe H1,
A bolt hole 61 for screwing a bolt when the valve B1 and the like and the tubular member 50 are connected by bolting is formed. Since the second connecting means is constructed as described above, by rotating the flange 60, the bolt hole 6
1 can be made to coincide with the bolt holes provided in the flange portions of the pipe H1, the valve B1, etc. to be connected. Therefore, the flange 60 and the pipe H1, the valve B
Since it is possible to easily fix the flange (not shown) such as 1 using bolts, it is possible to freely connect the pipe or the like connected to the second connecting means. Since the second connecting means F1 and F2 are configured in this way, the second connecting means F
1, 1 and F2 can be engaged and connected with the hole 40, the pipe H1, the valve B1 and the like. Since the pipe joint K according to the embodiment of the present invention is configured as described above, first, by rotating the first connecting means R1 and R2, the pipe shaft of the pipe to be connected and the second pipe Align the central axis of the connecting means. Then, in order to make the bolt holes 61 of the flange 60 of the second connecting means F1, F2 coincide with the holes (not shown) of the flange of the pipe connecting the second connecting means F1, F2,
The pipes can be connected to each other by rotating the F2 around the central axis 41 of the hole 40 as a pivot and then bolting.

[0011]

EXAMPLE If the tubular member 50 has a structure longer than the thickness of the hole 40 of the first connecting means F1, there is an extra length 70 of the tubular member 50 as shown in FIG. 2 (A). It will be. Since the portion of the extra length 70 also has the same shape as the portion in contact with the inner circumference of the hole 40, the second connecting means slides in the pipe axial direction (the axial 41 direction) with respect to the hole 40 within the range of the extra length 70. It is possible to move. For example, FIG. 3 shows a case where the second connecting means F1 and F2 in the state of FIG. 2A are slid in the extending direction. In this way, by making it possible to slide the second connecting means F1 and F2 with respect to the holes 40 of the first connecting means R1 and R2, the distance between the tip portions of the pipes to be connected can be reduced. It becomes possible to provide the pipe joint K of the present invention according to the length. In addition, the second connecting means F1 and F2 are excessively extended in the extending direction,
Alternatively, in order to prevent the tubular member 50 from completely slipping out of the hole 40 of the first connecting means R1 and R2 during the installation work of the pipe joint K, the retaining means 21 protruding to the outer periphery of the tubular member 50 is provided. May be. By providing the retaining means 21 in this way, the second connecting means F1,
Even if the extension of F2 is performed excessively, the retaining means 21 is caught by the steel plate 30 of the first connecting means R1 and R2, so that the tubular member 50 of the second connecting means F1 and F2 is completely removed from the hole 40. It will not fall out.

[0012]

According to the present invention, in a pipe joint for connecting pipes that are substantially parallel to each other and are separated from each other in the pipe axis direction, a casing having a tubular shape and serving as a shell of a fluid passage, and the above casing. A hole having a central axis at a position different from the central axis of the casing, the first connecting means being rotatably provided at both ends of the casing about the central axis of the casing, the hole and the pipe. A second connecting means for engaging and connecting the hole and the tube, and the first connecting means.
And the central axis of the second connecting means is parallel to the central axis of the casing. That is, when connecting pipes that are substantially parallel and separated from each other in the pipe axis direction, a pipe joint having a universal joint as in the related art is connected to the end portions of the pipes to be connected with each other. Although it was necessary to adjust the angle three-dimensionally, since the pipe joint of the present invention is configured as described above, it is only necessary to rotate the first connecting means with the central axis of the casing as the pivot axis. The second connecting means can be connected to the ends of the tubes, and the tubes can be easily connected to each other.

The second connecting means of the pipe joint of the present invention comprises:
It is desirable that the hole is slidably provided in the tube axial direction. By configuring the second connecting means as described above, the tubes are connected to each other by sliding the second connecting means in the tube axial direction according to the distance between the tips of the tubes. It becomes possible to do. Further, the second connecting means may be rotatably provided with the central axis of the hole as a pivot. By configuring the second connecting means in this way, for example, when the second connecting means and the pipe are connected by bolting, by rotating the second connecting means, the second connecting means is rotated. It becomes possible to match the position of the bolt hole of the connecting means of 2 with the position of the bolt hole of the pipe,
It becomes possible to easily tighten the bolts. Furthermore,
It is desirable that the second connecting means is provided with a retaining means so as not to be removed from the hole, and the pipe joint of the present invention is provided with such a retaining means so that, for example, at the time of pipe connection work or the like. In the above, it is possible to prevent the second connecting means from falling out of the first connecting means.

In the present invention, at both ends of the casing in which the first connecting means is provided, first water blocking means having a ring shape for preventing leakage of fluid in the casing, or It is preferable that each of the holes of the first connecting means provided with the second connecting means is provided with a second water blocking means having a ring shape for preventing leakage of fluid in the casing. According to the present invention, by providing the ring-shaped water stopping means (for example, an O-ring, a labyrinth packing, and other conventionally existing water stopping means) in the present invention on the inner surface of the tubular casing or the inner surface of the hole. It becomes possible to perform the sealing process more easily than the special sealing process (water-stopping process) of the universal joint part of the ball joint structure.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of use of a pipe joint according to an embodiment of the present invention.

FIG. 2 is an explanatory view of the pipe joint according to the embodiment of the present invention.

FIG. 3 is an explanatory view of a pipe joint according to an embodiment of the present invention.

[Explanation of symbols]

K ... Pipe fitting R1, R2 ......... First connection means F1, F2 ......... Second connection means 31 ......... Center axis of casing 80 40 ......... hole 41 ......... Center axis of hole 40

Claims (6)

[Claims] 1. A pipe joint for connecting pipes that are substantially parallel to each other and are separated from each other in the pipe axial direction, wherein the casing has a tubular shape and serves as a shell of a fluid passage, and a central axis of the casing. Has holes having central axes at different positions, and engages with the first connecting means rotatably provided at both ends of the casing about the central axis of the casing as pivots, the holes and the pipe, A pipe comprising a second connecting means for connecting the hole and the pipe, wherein the central axes of the first and second connecting means are parallel to the central axis of the casing. Fittings. 2. The pipe joint according to claim 1, wherein the second connecting means is provided slidably in the pipe axial direction with respect to the hole. 3. The pipe joint according to claim 1, wherein the second connecting means is provided so as to be rotatable around a central axis of the hole as a pivot axis. 4. The pipe joint according to claim 1, wherein the second connecting means is provided with retaining means so as not to be removed from the hole. 5. A first water blocking means having a ring shape for preventing leakage of fluid in the casing is provided at both ends of the casing provided with the first connecting means. The pipe joint according to any one of claims 1 to 4. 6. A second water blocking means having a ring shape for preventing leakage of fluid in the casing is provided in the hole of the first coupling means provided with the second coupling means. The pipe joint according to any one of claims 1 to 5.