JP3554944B2 - Piping fitting - Google Patents

Description

[0001]
[Industrial applications]
TECHNICAL FIELD The present invention relates to a pipe joint for connecting pipe members.
[0002]
[Prior art]
2. Description of the Related Art Various pipe joint methods for connecting pipe materials have conventionally been used. At present, as an existing and general joint, there is a so-called commercially available one-touch coupler which is found in a connection portion of a city gas hose, for example. As shown in FIG. 3, this one-touch coupler fixes an insertion member 103 having an insertion head 102 at one end (101) of one of the pipes (101, 111) to be connected, and the other (111). A socket member 112 having a socket for receiving the insertion head 102 is fixed to an end of the tube material, and the insertion head 102 is inserted into a socket of the socket member 112.
[0003]
Here, the receptacle member 112 is composed of an inner ring 113 and an outer ring 114 slidably provided relative to the outer peripheral surface of the ring, and the inside of the outer ring 114 serves as a receptacle. A plurality of protrusions 115 are resiliently provided on the inner peripheral surface of the outer ring 114 so as to be able to protrude and retract.
[0004]
On the other hand, a plurality of recesses 104 are provided on the outer peripheral surface of the insertion head 102 so as to fit with the protrusions 115 on the inner peripheral surface of the outer ring 114. Then, when the insertion head 102 is inserted into the outer ring 114 (receptacle), the outer ring 114 simultaneously slides on the inner ring 113 on the outer peripheral surface in the downward direction (in the direction of the arrow in the figure). It slides on the outer peripheral surface of the insertion head 102 in the state.
[0005]
As the sliding of the outer ring 114 proceeds, the protrusion 115 comes to the position of the recess 104 on the outer peripheral surface of the insertion head 102. At this time, since the pressing on the protrusion 115 is released, the protrusion 115 protrudes from the inner peripheral surface of the outer ring 114 and fits into the concave portion 104. By this fitting, both pipe members (101, 111) are in a connected state.
[0006]
Usually, a gasket is interposed at a connecting surface between the end of the insertion head 102 and the end of the inner ring 113. In a pipe joint using such a one-touch coupler, a pipe material connection with high airtightness can be performed while the connection is simple.
[0007]
In addition to the one-touch coupler as described above, there is a pipe joint using a flange as a pipe joint. For example, in the pipe flange shown in FIG. 4, the ends of the pipe materials (201, 211) to be connected are fixed to the flanges (202, 212) by screwing, riveting, shrink fitting, welding, pressure, or the like. Both flanges (202, 212) are bolted through a non-metallic gasket of paper, fiber, hemp, soft rubber, leather, or the like, or an O-ring 203, which is a metal gasket of copper, lead, or mild steel, for sealing the flange connection surface. ) There is something to conclude.
[0008]
In such a pipe flange, not only the airtightness is high, but also the mechanical strength of the pipe connection is large.
[0009]
[Problems to be solved by the invention]
However, in the conventional pipe joint as described above, the one-touch coupler first has a slight degree of freedom in the fitting portion between the projection and the concave as shown in FIG. Will occur. Therefore, there is a problem in mechanical strength that the connection portion is liable to be damaged due to the backlash and breakage is likely to occur.
[0010]
In addition, pipe flanges have high airtightness and can secure mechanical strength.However, there is a risk that gasket members may be lost or bolts may fall down due to long-term use. In the equipment, there is a danger that the gasket members and bolts that have fallen into the cooling water to form foreign matters, which may hinder the operation of the nuclear reactor, thereby causing problems with the entire piping equipment.
[0011]
In addition, as can be seen from FIG. 4, when the flange is used, the diameter of the connection portion becomes very large as compared with the diameter of the pipe material. Therefore, in a piping system requiring many such pipe joints, the configuration of the entire diameter is not sufficient. There was also a problem that the size was increased accordingly.
[0012]
In view of the above problems, an object of the present invention is to obtain a pipe joint that can ensure high airtightness and mechanical strength at the same time and does not cause a joint member to fall off.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, in the pipe joint according to the first aspect of the present invention, in a pipe joint for connecting a first pipe member and a second pipe member, the pipe joint is fixed to an end of the first pipe member. A plug member having a plug head at the tip, a plug member fixed to the end of the second tube, and having a plug for receiving the plug head at the tip, an inner peripheral surface of the plug member and the plug A plurality of projections which are resiliently provided on one of the outer peripheral surface of the head and the other of the inner peripheral surface of the receptacle and the outer peripheral surface of the insertion head can be fitted with the projections. A plurality of recesses provided in the connector, cover the outer periphery of the connecting portion of the first and second pipes in a state where the insertion head is inserted into the receptacle, and a tapered surface on the inner periphery of one open end. A tubular member having a female screw on the inner periphery of the other open end; A tapered member having an outer peripheral tapered surface in close contact with the tapered surface to form a sealing portion, the tapered member being fixed to a vicinity of a tail end portion of the socket member of the second pipe member, and the female screw of the cylindrical member And a male screw member fixed near the tail end portion of the insertion member of the first pipe member.
[0014]
[Action]
In the present invention, an insertion member having an insertion head at the tip is fixed to an end of the first tube, and a male screw member is fixed near a tail end portion of the insertion member. A receptacle member having a receptacle for receiving the insertion head at the tip is fixed to the portion, and a taper member is fixed near the tail end portion of the receptacle member.
[0015]
When connecting the first and second pipes, the insertion head of the first pipe is inserted into the receptacle of the second pipe, and either the inner peripheral surface of the receptacle or the outer peripheral surface of the insertion head is inserted. On one side, a plurality of projections are provided so as to be able to protrude and retract, and on the other of the inner peripheral surface of the receiving port and the outer peripheral surface of the insertion head, a plurality of concave portions are provided so as to be fittable with the projections. When the insertion head is inserted into the receptacle and the projection and the recess are fitted to each other, the first tube and the second tube are in the first connection state.
[0016]
Further, in the present invention, the outer periphery of the connection portion is covered by the tubular member. The tubular member has a tapered surface on the inner periphery of one open end, and has a female screw on the inner periphery of the other open end, and the female screw is a male screw member fixed to the first tube. Is screwed. Therefore, when the male screw member is fitted into the female screw of the cylindrical member and tightened while rotating the cylindrical member, the outer peripheral tapered surface of the tapered portion fixed to the second pipe member is in close contact with the tapered surface of the cylindrical member. Form a sealing portion.
[0017]
In the above state, a final connection state is established, and the connection between the pipe materials by the pipe joint of the present invention is completed. At this time, the joint portion is almost completely sealed by the tubular member. According to such a pipe joint of the present invention, rattling does not occur in the joint portion due to the cylindrical member, so that good mechanical strength can be ensured, high airtightness can be obtained, and the member forming the joint can be made external. And it does not affect the piping equipment.
[0018]
【Example】
Hereinafter, the present invention will be described with reference to examples. FIG. 1 shows a schematic configuration of a pipe joint according to an embodiment of the present invention. In the pipe joint 1 of the present embodiment, an insertion member 13 is fixed to an end of one pipe 11 to be connected, and an insertion head 14 is formed at the tip. The male screw member 12 is fixed near the tail end portion of the insertion member 13 of the tube 11.
[0019]
A receiving member 23 having a receiving port 24 for receiving the insertion head 14 is fixed to the distal end of the other pipe 21 to be connected, and a tapered member 22 having an outer tapered surface 22t near a tail end portion of the receiving member 23. Has been fixed. Two projections 25 are resiliently provided on the inner peripheral surface of the receiving port 24 so as to be able to protrude and retract, and two concave portions 15 capable of fitting with the projections 25 are provided on the outer peripheral surface of the insertion head 14. .
[0020]
Such connection between the pipe 11 and the pipe 21 is performed in the tubular member 1. That is, in the cylindrical member 1, the insertion head 14 is inserted into the receptacle 24, and fitted into the two recesses 15 on the outer peripheral surface of the insertion head 14 and the two projections on the inner peripheral surface of the receptacle 24. At the beginning when the insertion head 14 is started to be inserted into the receptacle 24, the projection 25 is pressed down by the outer peripheral surface of the insertion head 14 and is in a immersed state, but when the insertion proceeds and the recess 15 reaches the position of the projection 25. Then, the pressing of the projection 25 is released, and the projection protrudes and retracts, and fits into the recess 15.
[0021]
The first connection state in the tubular member 1 between the pipe 11 and the pipe 21 is achieved by such fitting. The fitting connection between the receptacle 24 and the insertion head 14 by fitting the projection 25 and the recess 15 may use the general configuration of the above-described conventional one-touch coupler. It should be noted that higher airtightness can be obtained by interposing an O-ring (gasket) on the connection surface between the bottom of the receptacle 24 and the end of the insertion head 14.
[0022]
In this embodiment, a female screw 4 to be screwed with a male screw member 12 fixed to the pipe 11 is formed on the inner periphery of the open end on the pipe 11 side of the cylindrical member 2, and the open end on the pipe 21 side is formed. A tapered surface 3 that can be in close contact with the outer tapered surface 22t of the tapered member 22 fixed to the tube 21 is formed on the inner periphery.
[0023]
Then, after the first connection state by fitting the receiving port 24 and the insertion head 14 is completed, the cylindrical member 2 is screwed into the female screw 4 so that the male screw member 12 is screwed into the female screw 4 so as to be tightened. Rotate while pressing down in the direction. As the screwing of the male screw member 12 and the female screw 4 progresses, the tapered surface 3 of the cylindrical member 2 approaches the outer peripheral tapered surface 22t of the tapered member 22, and finally the tapered surface 2 becomes the outer tapered surface of the tapered member 22. The sealing portion is formed in close contact with the surface 22t.
[0024]
As a result of the above operation, the tube 11 and the tube 21 are finally connected while being sealed by the tubular member 2. According to the pipe joint 1 in the present embodiment, members such as the O-ring constituting the joint do not fall out of the pipe joint 1. In addition, since the connecting portion is covered in a sealed state by the tubular member 2, there is no backlash unlike a conventional joint using only a one-touch coupler, so that good mechanical strength can be secured.
[0025]
Next, a case where a plurality of pipes are connected by a pipe joint 30 having the same configuration as the pipe joint 1 shown in FIG. 1 and used for collecting foreign matter and dust on the bottom surface of the pool will be described with reference to FIG. This is a suction pipe connected to the pump.
[0026]
First, as shown in FIG. 2 (a), each pipe 31 has a plug member 32 having a plug head 33 at one end and a receptacle member 35 having a receptacle 36 at the other end at one end. Each is fixed. 1, a male screw member 34 is fixed near the tail end portion of the insertion member 32, and a taper member 37 is fixed near the tail end portion of the socket member 36, respectively. Further, the other end is loosely fitted with a tapered surface 39 on the inner periphery of one opening end and a cylindrical member 38 provided with a female screw 40 on the inner periphery of the other opening end in a state where the receiving member 35 and the taper member 37 are covered. are doing.
[0027]
At each end of such a tube 31, the insertion member 32 and the receptacle member 35 are connected to the receptacle 36 and the projections and recesses of the insertion head 33 by fitting to each other, as in the case of FIG. After the state, each of the cylindrical members 38 is further rotated to screw and tighten the female screw 40 and the male screw 34 of the cylindrical member 38, and the tapered surface 39 of the cylindrical member 38 is tapered to the outer peripheral tapered surface of the tapered member 37. To form a sealing portion to make a final connection state.
[0028]
As described above, the plurality of pipes 31 are connected to each other by the pipe joint 30, and a pipe having a length necessary for suction at the pool bottom surface is obtained. As shown in FIG. 2 (b), one end of this pipe is connected to a pump, and the other end is placed on the bottom of the pool. Can do it.
[0029]
After the suction operation is completed, the connection at each pipe joint 30 may be released. That is, first, the cylindrical member 38 is turned to unscrew the male screw member 34 and the female screw 40, and at the same time, the close contact between the tapered surface 39 and the outer peripheral tapered surface of the tapered member 37 is released to open the cylindrical member 38. Is released. Thereafter, the first connection state between the insertion member 32 and the receiving member 35 is released.
[0030]
This can be achieved by releasing the fitting between the insertion head 33, the projection of the receptacle 36, and the recess. As described above, when it is necessary to release the connection of the pipe joint, the elastic mechanism of the projection may be provided with a fitting releasing means, that is, a means capable of immersing the projection. As such an elastic mechanism, a mechanism similar to a mechanism generally provided in a commercially available one-touch coupler can be used.
[0031]
As described above, if the connection at each pipe joint 30 is released, as shown in FIG. 2C, a relatively short pipe material can be housed in a uniform manner. If such a pipe joint 30 is used, an appropriate number of pipes are connected according to the application, and pipes of a required length can be easily formed while ensuring high airtightness and good mechanical strength at each connection portion. can get.
[0032]
In the above embodiment, the protrusions are elastically provided on the inner peripheral surface of the receiving port, and the concave portions are inserted and provided on the outer peripheral surface of the head portion. Further, the number of the projections and the corresponding concave portions is not limited to two as in the above-described embodiment, but may be three or more.
[0033]
Further, the pipe joint according to the present invention can be used for connecting various pipe materials such as a metal pipe joint, in addition to connecting flexible pipe materials such as gas hoses. Further, the material of the members constituting the pipe joint is appropriately selected according to the pipe material to be used and the use environment.
[0034]
【The invention's effect】
According to the pipe joint of the present invention, as described above, it is possible to connect the pipe members while securing high airtightness and good mechanical strength at the connection portion, and the members constituting the pipe joint fall out. Therefore, there is an effect that there is no possibility of affecting the piping facilities.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a pipe joint according to an embodiment of the present invention.
FIGS. 2A and 2B show a long pipe for suction work at the bottom of a pool constituted by using the pipe joint shown in FIG. 1, wherein FIG. 2A is a schematic configuration diagram illustrating pipe connection by the pipe joint, and FIG. FIG. 4 is an explanatory view showing a use state in a suction operation, and FIG. 4C is an explanatory view showing a storage state after disconnection of a pipe joint.
FIG. 3 is an explanatory diagram showing pipe connection by a one-touch coupler as an example of a conventional pipe joint.
FIG. 4 is an explanatory view showing pipe connection by a flange as another example of a conventional pipe joint.
[Explanation of symbols]
1, 30: piping joint 2, 38: cylindrical member 3, 39: tapered surface 4, 40: female screw 11, 21, 31: pipe 12, 34: male screw member 13, 32: insertion member 14, 33: insertion head Part 15: concave portions 22, 37: tapered member 22t: outer peripheral tapered surface 23, 35: socket members 24, 36: socket 25: concave portion

Claims (1)

In a pipe joint for connecting the first pipe material and the second pipe material,
An insertion member fixed to an end of the first tubular material and having an insertion head at a tip end;
A receiving member fixed to an end of the second tubular material and having a receiving end at the distal end for receiving the insertion head;
A plurality of protrusions provided so as to be able to protrude and retract on one of the inner peripheral surface of the receptacle member and the outer peripheral surface of the insertion head,
A plurality of recesses provided on the other of the inner peripheral surface of the receptacle and the outer peripheral surface of the insertion head so as to be fittable with the projection;
When the insertion head is inserted into the socket, the insertion head covers the outer periphery of the connection portion between the first and second pipes, has a tapered surface on the inner periphery of one open end, and has the inside of the other open end. A cylindrical member having a female screw on the periphery,
A tapered member having an outer peripheral tapered surface that closely adheres to the tapered surface of the cylindrical member to form a sealing portion, and fixed near a tail end portion of the receiving member of the second pipe;
A male screw member screwed with the female screw of the cylindrical member, and fixed near a tail end portion of the insertion member of the first pipe member;
A pipe joint comprising:

Images