JP2004068963A - Pipe with stopper for pipe line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe with a stopper for a pipe line capable of making a fixed connection similar to a conventional one without using a stopper pressing ring. <P>SOLUTION: This pipe is integrally provided with a stopping means having a stopper claw at an end part side of the pipe which can bites in an outer peripheral surface of the other pipe inserted for the connection, a bolt for the stopper claw making the stopper claw bite in, and a holder operably holding the stopper claw and the bolt for the stopper claw. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pipe for a duct such as a ductile pipe which constitutes a water pipe formed by sequentially connecting pipes of a required length, for example, pipes buried underground.
[0002]
[Prior art]
Pipes buried underground are naturally susceptible to ground deformation. For example, pipes may be bent to sink due to land subsidence, or pipes may extend in the extending direction (axial direction of the pipe). If the pipes are exposed, the connection between the pipes is often broken or dislodged by bending pressure or stretching force. Such an accident is an important problem particularly in a pipeline forming a lifeline such as a water supply.
[0003]
Conventionally, connection between a conventional pipe and a pipe is performed by, for example, inserting one end of the main body of the pipe, that is, the side on which the flange is formed, by inserting the end of the main body of the other conventional pipe. In order to prevent fluid leakage, a connection port end part whose inner diameter is partially enlarged is provided, and the end side of the other pipe is inserted (fitted) by, for example, about 100 mm into the connection end part. Or after applying sealing means, the tubes are connected to each other.
When connecting in this manner, the sealing means (rubber ring) and a pressing ring for pushing the sealing means into the flange side are inserted into the other pipe side inserted for connection in advance. In this case, by tightening the pressing ring and the flange with bolts, the sealing means is pushed into the flange side to prevent fluid leakage and connect both pipes.
[0004]
Some of the above-mentioned push rings are provided with a retaining claw that cuts into the outer peripheral surface of the inserted tube so that the inserted tube does not come off, and the connection using the pressing wheel having such a retaining claw is fixedly connected. It is called a retaining ring.
On the other hand, connecting using a pressing ring without a retaining claw is called non-fixed connection, and the pressing ring is called a general pressing ring.
In the conventional fixed connection using the retaining ring, the insertion side of the other pipe (connection pipe) is inserted before the other pipe (connection pipe) is inserted into the pipe (connection pipe) as described above. A stopper ring or a ring-shaped sealing member (rubber ring) is inserted and inserted into the end of the tube in advance, and the other tube (connection tube) is inserted with these members inserted and the insertion tube is received. The flange of the (connected pipe) and the retaining ring of the inserted pipe (connection pipe) are fastened with a plurality of fastening bolts to connect the pipes.
[0005]
[Problems to be solved by the invention]
The conventional fixed connection using the retaining ring has the following problems.
First, besides the pipe to be connected (the connecting pipe or the connected pipe), a retaining ring and a sealing member as separate members must be prepared.
Secondly, in the connection work, a preparatory work was required in which these separately prepared retaining rings and seal members were previously fitted to the other pipe (connection pipe) to be inserted. .
Third, at the time of fastening work between the flange of the pipe (connected pipe) that has received the insertion and the pressing ring of the inserted pipe (connection pipe), the position of the seal member interposed between the two is determined on the flange side of the connection pipe. It must be tightened while adjusting the pressure.
Fourth, after the flange and the press ring are fastened at a plurality of positions by using fastening bolts, a fixing operation must be performed so that the retaining claws of the press ring can appropriately bite into the outer peripheral surface of the inserted pipe (connected pipe). No.
Fifth, since the overlapping portion (fitting portion) of the pipes has only a slight overlap of about 100 mm in the axial direction of the pipes, the last one pipe in the pipe in the predetermined section is not affected by the overlap. Of course, if the length of the tube is not changed, it often cannot be accommodated, and it is necessary to cut the tube to a required length.
[0006]
An object of the present invention is to solve the above-mentioned problems and to provide a pipe with a retaining pipe for a pipe line which can be fixedly connected in the same manner as before without using a retaining ring.
[0007]
[Means for Solving the Problems]
The invention of the pipe with a retaining pipe for a pipe according to the first aspect of the present invention is a retaining claw which can bite into the outer peripheral surface of another pipe inserted for connection to the pipe at the end side of the pipe and the retaining claw which bites the retaining claw. A retaining means comprising a pawl bolt, a retaining pawl and a holder operably holding the retaining pawl bolt is provided integrally.
[0008]
According to a second aspect of the present invention, there is provided the pipe with a stopper according to the first aspect, wherein a main body side enlarged inner diameter portion through which another pipe can be inserted from the end of the pipe to the main body of the pipe is provided. It is characterized by having.
[0009]
According to a third aspect of the present invention, in the pipe with retaining pipe according to the second aspect, an outer peripheral surface of another pipe inserted into an inner peripheral surface of the main body side enlarged inner diameter portion on an end portion side of the pipe. A sealing means mounting portion for mounting a sealing means which is in close contact with the device.
[0010]
According to a fourth aspect of the present invention, in the pipe with the pipe retaining structure according to the second or third aspect, the main body-side enlarged inner diameter portion is another pipe inserted into the pipe around the end side of the pipe. It is characterized in that it is formed so as to be capable of scrubbing.
[0011]
According to a fifth aspect of the present invention, in the pipe with a withdrawal according to the fourth aspect, the enlarged inner diameter portion on the main body side is directed from the end of the pipe to the insertion tip side of another pipe inserted into the pipe. The diameter is gradually increased.
[0012]
According to a sixth aspect of the present invention, in the pipe with retaining pipe according to the fourth or fifth aspect, the end of the pipe that is the center of the scrubbing movement has a diameter gradually increasing toward the opening edge of the end. An enlarged inner diameter portion on the end side is provided.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
A pipe with a retaining pipe for a pipeline (hereinafter, also simply referred to as a pipe) shown in this embodiment is another pipe inserted for connection at one end side of the pipe (hereinafter, also referred to as a connected pipe). A retaining claw that includes a retaining claw that can bite into the outer peripheral surface of a pipe (hereinafter, also referred to as a connecting pipe), a locking claw bolt that allows the locking claw to bite, and a holder that operably holds the locking claw and the locking claw bolt. Three means are arranged at equal intervals on the opening edge of the end portion, and these are provided integrally with the pipe (connected pipe).
Hereinafter, this will be described with reference to FIGS. 1 is an axial longitudinal sectional view of the pipe, FIG. 2 is a front view of the opening edge side of the pipe, and FIG. 3 is an enlarged view of a main part of FIG.
[0014]
In FIGS. 1 and 2, reference numeral 1 denotes a pipe with a retaining pipe (tube).
On one end side of this pipe (connected pipe) 1, an opening edge 2a of an end 2 on the left side in FIG. 1, three retaining means 3 (3A, 3B) are equally spaced along the opening edge 2a. , 3C) are provided integrally with the tube 1. The retaining means 3 (3A, 3B, 3C) will be described later. In addition, the end portion 2 here corresponds to a flange portion in a flanged pipe.
[0015]
In FIGS. 1 and 3, reference numeral 4 denotes another pipe (connection pipe) inserted for connection to the pipe (connected pipe) 1 from the end 2 side of the pipe 1. The other pipe (connection pipe) 4 may be a pipe having the same form as the pipe 1 or a pipe having a different form from the pipe 1. Hereinafter, the inserted or inserted other pipe 4 is also referred to as a connection pipe, and the pipe 1 that receives the insertion of the connection pipe 4 is also referred to as a connected pipe.
[0016]
In FIG. 3, the retaining means 3 (3A) includes a retaining claw 31 that can bite into the outer peripheral surface of the inserted other pipe (connection pipe) 4, a retaining claw bolt 32 that allows the retaining claw 31 to bite, And a holder 33 for operably holding the retaining claw 31 and the retaining claw bolt 32.
The holder 33 is formed integrally with the pipe (connected pipe) 1 so that the retaining claw 31 is loosely fitted inside the pipe (connected pipe) 4 in a substantially vertical state with respect to the outer peripheral surface of the pipe (connected pipe) 4. At the claw holding hole 33a to be held, and at the rear end side of the claw holding hole 33a, that is, at the rear end side of the locking claw 31, a direction in which the locking claw bolt 32 is parallel to the axis (tube axis) of the pipe (connected pipe) 1. A screw hole 33b for a retaining claw is formed so as to be screwed into the hole.
[0017]
As shown in FIG. 3, when another pipe (connection pipe) 4 is inserted into the pipe 1 (connected pipe), the locking nail bolt 32 is screwed into the locking nail screw hole 33 b of the holder 33. While the retaining claw 31 whose rear end is pressed by the substantially conical tapered surface formed at the tip of the retaining claw bolt 32 is guided by the retaining claw hole 33a, the toe of the retaining claw 31 is as shown in FIG. As shown by the imaginary line, it penetrates into the outer surface of another pipe (connection pipe) 4.
[0018]
2 and 3, in the other two retaining means 3B and 3C configured similarly to the retaining means 3A, similarly to the above description, by screwing the retaining claw bolt 32 (FIG. 3), In this example, the retaining claws 31, 31, 31 bite into three places on the outer peripheral surface of the inserted pipe (connection pipe) 4 to prevent the pipe (connection pipe) 1 from coming off from the pipe (connection pipe) 1. Is done. The above-mentioned retaining means 3 (3A, 3B, 3C) may be arranged in an appropriate number according to the pipe diameter.
[0019]
As described above, in this embodiment, the required number of retaining means 3 is integrally provided at the end 2 on one end side of the pipe (connected pipe) 1, and thus the retaining push ring conventionally required. Is unnecessary, and connection can be made relatively easily and quickly without performing complicated work.
That is, in addition to the pipe to be connected (the pipe 4 or another pipe 1 having the same form as the pipe 1), a retaining ring as a separate member is not required. This eliminates the need for a pre-fitting work to be inserted into the 4.
In addition, in this embodiment, the locking claw 31 of the locking means 3 can be fixedly connected only by appropriately engaging the outer peripheral surface of the inserted pipe (connection pipe) 4 with a conventional method. Furthermore, there is no need to perform two operations of fastening the flange and the press ring to the outer periphery of the pipe (connection pipe) 4 into which the retaining claws of the press ring are inserted after fastening the plurality of places using the fastening bolts.
[0020]
In FIGS. 1 and 3, a pipe (connected pipe) 1 according to this embodiment has a main body of the pipe 1 from the end 2 side (refers to a main body of the pipe 1 excluding the end 2). A main-body-side enlarged inner diameter portion 1A having an enlarged inner diameter so that another pipe (connection pipe) 4 can be inserted is provided so as to extend to the side.
The illustrated main body side enlarged inner diameter portion 1A is formed so as to extend from the end 2 of the pipe 1 to the main body side about 300 mm deep with respect to a pipe (connection pipe) 1 having a total length of 2000 mm.
[0021]
The length (area) of the main body side enlarged inner diameter portion 1A in the tube axis direction may be an appropriate length according to the use of the tube 1.
Further, by making the region of the main body side enlarged inner diameter portion 1A sufficiently long in the tube axis direction, the overlapping portion (fitting portion) of the tube 1 and the tube 4 connected to each other becomes longer. Regarding the last one pipe (connection pipe) 4 in the pipe line of the predetermined section, the length of the pipe 4 can be stored as it is, and connection can be made without cutting. That is, when the length adjustment is required at the work site, the pipe (connection pipe) 4 does not need to be cut to an appropriate length, and the overlapping amount of the pipe (connection pipe) 1 and the pipe (connection pipe) 4 is eliminated. By appropriately adjusting the (insertion length), the length of the conduit can be easily adjusted.
[0022]
The inner peripheral surface of the main body side enlarged inner diameter portion 1A on the end 2 side of the pipe (connected pipe) 1 is in close contact with the outer peripheral surface of another inserted pipe (connection pipe) 4 to prevent fluid leakage. A sealing means mounting section 5 (hereinafter, also referred to as a mounting section) to which a sealing means (not shown) for preventing is mounted is provided.
The illustrated mounting portion 5 is an annular groove in which a part of the inner peripheral surface of the main body-side enlarged inner diameter portion 1A is further formed to have an inner diameter that is further enlarged, and the cross section is formed in a substantially U-shape. This annular groove (5) is a groove having an appropriate width (for example, 35 mm) in the axial direction of the pipe (connected pipe) 1, and a convex portion 51 projecting annularly from the groove bottom is provided at an appropriate position on the groove bottom. Have been.
[0023]
The sealing means (not shown) is a ring-shaped, for example, rubber ring formed in a complementary shape so that the transverse section fits in the annular groove (5), and a tube (in which the inner peripheral surface of the rubber ring is inserted). The outer peripheral surface of the connection pipe 4 is closely attached.
The rubber ring as the sealing means is fitted to the mounting portion 5 before the pipe (connection pipe) 4 is inserted, so that the rubber ring is positioned by sliding with the outer peripheral surface of the pipe 4 to be inserted. The above-mentioned convex portion 51 is provided so as not to shift.
[0024]
According to this embodiment, the sealing means (rubber ring) is mounted in advance in the annular groove (5) at the stage of manufacturing or shipping the pipe (connected pipe) 1 as a product, so that the work site It is not necessary to prepare a sealing member such as a rubber ring as a sealing means as a separate member at the time of the connection work in the above, and the other pipe (connection pipe) to be inserted in advance at the connection work site 4 can be omitted.
Further, as in the prior art, when fastening the flange of the pipe (connected pipe) that has received the insertion and the pressing ring, the position of the seal member interposed therebetween is pushed into the flange side of the pipe (connected pipe). There is no need to perform fastening bolt tightening work while adjusting.
[0025]
In this embodiment, as shown in FIG. 3, the main body-side enlarged inner diameter portion 1 </ b> A is centered on the end 2 side of the pipe (connected pipe) 1, more precisely, on a neck 6 described later. The other pipe 4 (connecting pipe) inserted into the pipe 1 is formed so as to be capable of scrubbing.
In FIG. 3, the portion of the pipe (connected pipe) 1 that grips the pipe (connected pipe) 4 so as to allow the scrubbing motion is an annular groove as a sealing means mounting portion formed in the main body side enlarged inner diameter portion 1A. The neck portion 6 is located between (5) and the claw holding hole 33a into which the retaining claw 31 of the retaining means 3 is loosely fitted.
It is preferable that the width of the neck portion 6 in the tube axis direction is narrow (the length in the tube axis direction is short) in order to smoothly perform the scrubbing motion. In this example, it is about 7 mm. The inner diameter of the neck portion 6 is equal to the inner diameter of the main body 1B (FIG. 3) of the tube 1 and substantially equal to the outer diameter of the tube 4 to be inserted.
[0026]
2 and 3, in this embodiment, further, in order to smoothly perform the scrubbing movement, the main body side enlarged inner diameter portion 1A is moved from the end 2 side of the pipe (connected pipe) 1 to the pipe. The inner diameter of the other pipe (connection pipe) 4 is gradually increased toward the insertion end of the other pipe (connection pipe) 4 inserted into the pipe 1.
In this case, for example, in FIG. 2, when the pipe (connection pipe) 4 is tilted to the maximum from the state shown in the figure, a part of the outer peripheral surface of the pipe 4 and the main body-side enlarged inner diameter of the pipe (connected pipe) 1 It is preferable that a part of the inner peripheral surface of the portion 1A has a shape that makes uniform contact in the axial direction.
By forming in this manner, it becomes difficult for the bending pressure of the pipe (connection pipe) 4 to be concentrated at one point on the main body side enlarged inner diameter portion 1A, so that the pressure resistance of the pipe (connection pipe) 1 is increased. Of course, the internal shape of the main body-side enlarged inner diameter portion 1A is not limited to this, but the point is that it is sufficient that the insertion distal end side of the inserted pipe 4 has a space capable of rubbing wood, as shown in FIG. From the part 6 toward the opening edge 2a side of the end part 2, an end-side enlarged inner diameter part 7 whose inner diameter gradually increases is provided so that the rubbing motion of the pipe 4 can be performed smoothly.
[0027]
By configuring the pipe (connected pipe) 1 in this manner, other pipes (connected pipes) 4 inserted (connected) into the pipe 1 can reduce the pressure of ground fluctuation such as an earthquake or land subsidence. Even if the pipe (not shown) is bent greatly due to the normal direction of the pipe, or if the pipe is extended as a result of the pipe being greatly bent, the neck portion is responsive to the pressure. 6 can be freely tilted, and the pipe (connecting pipe) 4 connected to the pipe (connected pipe) 1 is locked by the retaining claw 31 of the retaining means 3 so that it is pulled out and falls off. Therefore, it is possible to respond flexibly while maintaining the connection state.
[0028]
【The invention's effect】
According to each of the first to sixth aspects of the present invention, since the retaining means is integrally provided at one end of the pipe, the conventionally required retaining push ring is unnecessary, and complicated work is performed. Connection can be made relatively easily and quickly without performing.
[0029]
According to each of the inventions according to claims 2 to 6, since the main body side enlarged inner diameter portion is provided, even when receiving a pressure of ground fluctuation such as an earthquake or land subsidence, the neck portion is formed according to the pressure. Since the tubes relatively connected as the center can be freely inclined with respect to each other, the pipeline can be maintained flexibly.
[0030]
According to each of the third to sixth aspects of the present invention, since the sealing means mounting portion is provided on the inner peripheral surface side of the pipe, the sealing means (rubber ring) is previously prepared at the stage of manufacturing or shipping the pipe. Is attached to the sealing means mounting portion, so that it is not necessary to prepare a sealing means as a separate member at the time of connection work at the work site, and the other inserted beforehand at the connection work site. The troublesome and troublesome work of fitting the sealing means into the pipe (connection pipe) can be omitted.
Therefore, when fastening the flange and the press ring of the pipe (connected pipe) that has received the insertion, there is no need to interpose a seal member between the two, and the sealing means is pushed in to tighten while adjusting the position. There is no need to work.
[0031]
According to the fifth aspect of the present invention, since the bending pressure of the connecting pipe is less likely to be concentrated at one point on the main body-side enlarged inner diameter portion, the pressure resistance of the pipe (connected pipe) can be increased.
[0032]
According to the invention of claim 6, the connecting pipe can perform smoother scrubbing motion with respect to the connected pipe around the neck portion.
[Brief description of the drawings]
FIG. 1 is an axial longitudinal sectional view of a tube.
FIG. 2 is a front view of the opening edge side of the tube.
FIG. 3 is an enlarged view of a main part of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 pipe (connected pipe), 1A main part side enlarged inner diameter part, 2 ends, 3, 3A, 3B, 3C retaining means, 4 pipes (connecting pipe), 5 sealing means mounting part, 6 neck part, 7 end part Side enlarged inner diameter portion, 31 locking nails (locking means), 32 bolts for locking nails (locking means), 33 holders (locking means).

Claims (6)

At the end side of the pipe, a locking claw that can bite into the outer peripheral surface of another pipe inserted for connection to the pipe, a locking claw bolt that bites the locking claw, and the locking claw and the locking claw bolt are operated. A retaining pipe for a pipeline, wherein a retaining means having a holder capable of holding the retaining pipe is integrally provided. The pipe with a stopper according to claim 1, characterized in that a main body side enlarged inner diameter portion into which another pipe can be inserted is provided from an end side of the pipe to a main body of the pipe. On the inner peripheral surface on the end side of the tube of the main body side enlarged inner diameter portion, a seal means mounting portion is provided, in which a seal device that is in close contact with the outer peripheral surface of another inserted tube is provided. The pipe with a stopper for a pipe according to claim 2. The main body portion-side enlarged inner diameter portion is formed so that another pipe inserted into the pipe around the end side of the pipe can perform a rubbing movement. Pipe with retaining for pipe. The tube according to claim 4, wherein the main body-side enlarged inner diameter portion has a shape whose diameter gradually increases from an end portion of the tube toward an insertion tip side of another tube inserted into the tube. Road retaining tube. The end-side enlarged inner diameter portion whose diameter gradually increases toward the opening edge side of the end portion of the pipe serving as the center of the rubbing motion is provided, wherein the end-side enlarged inner diameter portion is provided. A pipe with a retaining pipe for the pipe described in the above.

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