JP2686192B2 - Adiabatic pipe fitting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating pipe joint device capable of maintaining the watertightness of a joint portion of a pipe line even if the joint portion expands or bends due to fluctuations in the ground.

[0002]

2. Description of the Related Art Insulating pipes having a double inner and outer structure as described above are used to transport hot and cold water for district heating and cooling, or to transport hot spring water.
In this heat insulating pipe, for example, as shown in FIG. 7, the outer peripheral surface of the pipe body 103 is covered with a heat insulating material 104 and an outer pipe 105, and one end of the heat insulating material is covered.
104 and outer tube 105 are cut out over a predetermined length and the tube body 103
One of the pipes 101 having the receiving port 106 formed by only the outer peripheral surface of the pipe body 103 is covered with the heat insulating material 104 and the outer pipe 105, and the heat insulating material 104 and the outer pipe 105 are provided at the other end. The other tube 102 which is notched over a predetermined length and has an insertion opening 110 formed only by the tube main body 103, and the receiving opening 106 and the insertion opening of the both pipes 101, 102.
The outer surface of 110 is covered with a heat insulating material 112, and the outer peripheral surface of this heat insulating material is covered with a cover body 113. Since the performance of the cover body 113 is significantly deteriorated when the heat insulating material 112 absorbs groundwater or the like, the cover body 113 is provided to stop the water, and is made of steel, resin, or a heat shrink tube. Further, the heat insulating material 104 and the outer pipe 105 are cut out to form the receiving port 106 and the insertion port 110 because of the work of connecting the both pipes 101 and 102. 115 is a push ring.

[0003]

By the way, in the conventional joint device connected as described above, when the joint portion expands or contracts due to the fluctuation of the ground, the cover body 113 cannot follow the displacement and is damaged. Water enters from the outside of the outer pipe 105 and there is concern about heat insulation and heat insulation of the joint. In addition, if the cover body 113 is damaged even at one place in the pipeline and water enters, it also penetrates into the heat insulating material of the pipe body and deteriorates the performance of the heat insulating material in the entire pipeline. It was

Therefore, the present invention solves the above-mentioned conventional problems, and even if the joint portion expands or contracts for some reason, the joint portion of the heat insulating pipe can sufficiently maintain the watertightness of the joint portion. The purpose is to provide a device.

[0005]

In order to achieve the above object, the joint device according to the first aspect of the present invention is such that the outer peripheral surface of the pipe body is covered with a heat insulating material and an outer pipe, and a receiving port is formed at one end. One of the pipes and the outer peripheral surface of the pipe body are covered with a heat insulating material and an outer pipe in the same manner as this pipe, and the heat insulating material and the outer pipe are cut out at the other end for a predetermined length and only the pipe body is used for insertion. And the other tube formed. The insertion opening of the other tube is inserted into the receiving opening of the one tube, and the annular first seal member is interposed between the outer surface of the insertion opening and the inner surface of the receiving opening.
A pressing wheel having a pressing portion for pressing the first sealing member toward the insertion end side at one end and a fitting portion for fitting the outer pipe of the other pipe at the other end is provided by the fastening member. It is fixed to the mouth of the pipe. An annular second seal member is interposed between the inner surface of the fitting portion of the push ring and the outer surface of the outer tube of the other tube. The space surrounded by the inner surface of the second seal member and the push ring and the outer surface of the first seal member and the insertion hole is filled with a heat insulating material.

In this case, a first push ring portion having a push portion at one end portion for pushing the first seal member toward the insertion opening end side by the push wheel,
A second having a fitting portion at one end that fits the outer tube of the other tube
The intermediate portion is divided into a push ring portion and a third seal member is interposed between the divided outer surface of the first push ring portion on the other end side and the divided inner surface of the second push ring portion on the other end side. You may do it.

A ring-shaped third seal member may be interposed between the inner surface near the pressing portion of the push wheel and the outer surface of the insertion opening of the other tube.

Further, in the joint device according to a fourth aspect of the present invention, the outer peripheral surface of the pipe body is covered with a heat insulating material and an outer pipe, and one pipe having a receiving port formed at one end, and the pipe body of the pipe body like this pipe. The outer peripheral surface is covered with a heat insulating material and an outer tube, and the outer tube is cut out at the other end for a predetermined length, and further the heat insulating material is cut out for a predetermined length from the outer tube so that the insertion opening is made only by the tube body. And the other tube formed. The insertion opening of the other tube is inserted into the receiving opening of the one tube, and the annular first seal member is interposed between the outer surface of the insertion opening and the inner surface of the receiving opening. A pressing wheel having a pressing portion for pressing the first sealing member toward the insertion end side, and a fitting portion formed at the other end having a diameter smaller than that of the outer pipe of the other pipe and fitted therein. Is fixed to the receiving port of one of the pipes by a tightening member. An annular second seal member is interposed between the outer surface of the fitting portion of the push ring and the inner surface of the outer tube of the other tube. The space surrounded by the inner surface of the second seal member and the push ring and the outer surface of the first seal member and the insertion hole is filled with a heat insulating material.

Further, in the joint device according to the fifth aspect, the outer peripheral surface of the pipe main body is covered with the heat insulating material and the outer pipe, and the heat insulating material and the outer pipe are cut out at one end for a predetermined length to receive only the pipe main body. The outer surface of the tube main body is covered with a heat insulating material and an outer tube like this tube, and the heat insulating material and the outer tube are cut out at the other end over a predetermined length, And the other tube having a spigot formed therein. The insertion opening of the other tube is inserted into the receiving opening of the one tube, and the annular first seal member is interposed between the outer surface of the insertion opening and the inner surface of the receiving opening. A pressing wheel having a pressing portion for pressing the first sealing member toward the insertion end side at one end and a fitting portion for fitting the outer pipe of the other pipe at the other end is provided by the fastening member. It is fixed to the mouth of the pipe. An annular second seal member is interposed between the inner surface of the fitting portion of the push ring and the outer surface of the outer tube of the other tube. Further, the outer peripheral surface of the push ring and the receiving port of one of the pipes is covered with a heat insulating material and a cover body. One end of the cover body and the connecting portion of the push ring are covered with a first water blocking cover having an annular shape, and the other end of the cover body and an outer pipe of one of the pipes have an annular second water blocking cover. Are covered by.

In the above, the connecting portion between the pipe main body of one of the pipes and the receiving end of the outer pipe may be covered with an annular water-stop cover. Further, an annular receiving groove is formed on the inner surface of the receiving opening of one of the pipes, and the diameter can be expanded / contracted by dividing the receiving groove into one in the circumferential direction, and the outer surface of the insertion opening of the other pipe. A lock ring that can be locked may be fitted to the protrusion provided on the.

[0011]

According to the joint device as described above, even if the insertion opening of the other pipe may slip out of the receiving opening of the other pipe due to the fluctuation of the ground, the first seal member and the second seal member remain unchanged. Therefore, the insertion port of the other pipe and the outer pipe move in the direction away from the one pipe, or the receiving port of the one pipe moves in the direction away from the other pipe. Watertightness is fully retained.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a joint device for heat insulating pipes according to one embodiment of the present invention. In FIG. 1, 1 is one of the heat insulating pipes and 2 is the other pipe. The outer peripheral surfaces of the pipe bodies 3 of both pipes 1 and 2 are covered with a heat insulating material 4 and an outer pipe 5, a receiving port 6 is formed at one end thereof, and the heat insulating material 4 and the outer pipe 5 are predetermined at the other end thereof. The insertion opening 10 is formed only by the tube main body 3 which is cut out over the length of. The receiving opening 6 of the one tube 1 has the insertion opening 10 of the other tube 2 inserted therein. A watertight rubber ring 11 is interposed between the outer surface of the inserted opening 10 and the inner surface of the receiving opening 6.

Numeral 13 is a push ring, which has an intermediate partition wall 14 and two large and small diameter walls 15 extending from the inner and outer peripheral edges of the wall in the axial direction of the pipe.
And a pressing portion 17 for pressing the rubber ring 11 from the insertion opening 10 side is formed at the end of the small diameter wall 15, and a flange is formed on the outer surface between the pressing portion and the intermediate partition wall 14. 18
Is provided. The large-diameter wall 16 has an inner diameter that can fit into the outer pipe 5 of the other pipe 2, and has an annular groove on its inner surface.
20 is formed, and a watertight rubber ring 21 is provided here in pressure contact with the outer surface of the outer tube 5 of the other tube 2.

Denoted at 23 is a bolt nut provided between the flange 18 of the push ring 13 and the receiving port 6 of the one pipe 1 for fastening and fixing the pressing ring 13 to the receiving port 6. A plurality of bolts and nuts are provided at predetermined intervals in the circumferential direction. It is provided. A heat insulating material 25 is provided with a filling hole and an air vent hole (not shown) in the large-diameter wall 16 of the push ring 13, and the rubber ring 21 is provided through the filling hole.
The inner space of the large and small diameter walls 15 and 16 of the push ring 13 and the intermediate partition wall 14, the rubber ring 11, and the outer space of the insertion port 10 are filled. The air vent hole is closed after filling. Reference numeral 26 is an annular water-stop cover, which is welded to cover the connecting portion of the pipe body 3 of the one pipe 1 and the end portion of the outer pipe 5 on the side of the receiving port 6.

In the joint device as described above, the required number of pipes 1 and 2 and the push ring 13 etc. are carried into the site, and first the rubber ring 21 deposited in the annular groove 20 of the large diameter wall 16 of the push ring 13 is The large diameter wall 16 of the push ring 13 is attached to the outer pipe 5 so that the outer pipe 5 of the other pipe 2 is pressed against the outer pipe 5.
Fits. Next, a rubber ring is attached to the outer surface of the insertion port 10 of the other tube 2.
After depositing 11 and inserting the insertion opening 10 of the other tube 2 into the receiving opening 6 of the one tube 1, and inserting the rubber ring 11 between the outer surface of the inserted insertion opening 10 and the inner surface of the receiving opening 6, The pressing portion 17 of the pressing wheel 13 is applied to the wheel 11 and is tightened and fixed by the bolt nut 23. Next, push ring 13
The heat insulating material 25 is filled through the filling hole provided in the large diameter wall 16 of FIG.
When the heat insulating material 25 is solidified, it is in a connected state as shown in FIG. In this connection work, the fitting of the other tube 2 of the push wheel 13 to the outer tube 5 and the filling of the heat insulating material 25 do not necessarily have to be performed on site, but may be performed at a factory. Insulation material 25
May be preformed.

In the connected joint device, for example, the insertion opening 10 of the other pipe 2 is changed to the receiving opening 6 of the one pipe 1 due to the fluctuation of the ground.
Even if it comes out to some extent, the rubber ring 11 pressed by the pressing portion 17 of the push ring 13 and the rubber ring 21 deposited in the annular groove 20 of the push ring 13 remain as they are, and the insertion port 10 of the other tube 2 is kept. And outer tube 5
Moves only in a direction away from one of the pipes 1, and the watertightness of both rubber rings 11 and 21 is maintained. Therefore, the heat insulating material 25 is protected from water leakage or water infiltration, and its performance deterioration is prevented.

FIG. 2 shows another embodiment. In this embodiment, a push ring 27 is divided into a first push ring portion 28 and a second push ring portion 29, which are divided into two large and small radial wall portions in the middle portion. The first push ring portion 28 has a push portion 30 for pushing the rubber ring 11 at one end, and
It is fastened and fixed to the receiving port 6 of the one tube 1 with a bolt nut 32 via 31. The outer surface on the other end side of the first push ring portion 28 is a flat surface, and a stopper ring 33 that is locked to the other end portion of the second push ring portion 29 to prevent slipping out is attached to the other end by a bolt 34. ing. On the other hand, the second push ring portion 29 is the rubber ring 21.
The other end side, which is opposite to the side having the groove, is bent downward, and an annular groove 35 is formed in the bent downward end surface, and the watertight rubber that is in pressure contact with the outer surface of the other end of the first push ring portion 28 is formed here. A ring 36 is provided. Further, an annular receiving groove 38 is formed on the inner surface of the receiving opening 6 of one of the pipes 1, and is divided into ones in the circumferential direction,
A lock ring whose diameter can be expanded and contracted and which can be locked to an annular projection 39 welded to the outer surface of the distal end of the insertion opening 10 of the other tube 2.
40 is fitted. Reference numeral 41 denotes a circumferentially divided spacer, which is inserted and arranged on the outer surface of the insertion opening 10 between the lock ring 40 and the rubber ring 11, and plays a role of positioning the tip of the rubber ring 11 and the like. . Although the other parts are slightly different in shape and the like, they have substantially the same configuration as the embodiment of FIG. 1, and therefore, the same parts are denoted by the same reference numerals and the description thereof will be omitted.

FIG. 3 shows still another embodiment. In this embodiment, a small diameter portion wall 45 having substantially the same diameter as that of the small diameter portion wall 44 of the push wheel 43 is provided on the opposite side. An annular groove 46 is formed on the inner surface of the small-diameter portion wall 45, and a watertight rubber ring 47 that is in pressure contact with the outer surface of the insertion opening 10 is provided here.

Numeral 48 is a bolt nut for fastening and fixing the push ring 43 to the receiving port 6, and as shown in detail in FIG.
49 has a hemispherical head 50 at one end and a fixing nut 51 in the middle, and the head 50 fits into a recess 53 formed in the intermediate partition wall 52 of the push ring 43, and also with a retaining plate 54. Is locked in,
The nut 51 is assembled so that it is closer to the screw side of the bolt 49 than the prevention plate 54. Reference numeral 55 is a bolt for fixing the prevention plate 54 to the intermediate partition plate 52. In addition, the outer diameter of the head 50 is a, the prevention plate
Assuming that the hole diameter of 54 is b and the outer diameter of the nut 51 is c, these relationships are a>b> c. Although the other parts are slightly different in shape and the like, they have substantially the same structure as the embodiment of FIG. 1 or FIG. 2, and therefore, the same parts are denoted by the same reference numerals and the description thereof will be omitted.

In the joint device of this embodiment, the push ring 43, the rubber ring 11, the spacer 41 and the lock ring 40 are inserted into the insertion port 10 in advance before the welding of the annular projection 39. For the bolt nut 48, after the head 50 is put in the recess 53, the prevention plate 54 is stopped by the bolt 55, and the nut 51 is turned by a spanner or the like.
49 is screwed in, and the push ring 43 is fixed to the socket 6. The rubber ring 47 is preferably fitted in the annular groove 46 in advance. The other work at the site is almost the same as in the above embodiment.

Also in this embodiment, the same operation as the above-mentioned embodiment is achieved. Moreover, in this embodiment, when the other tube 2 is pulled out, the annular projection 39 is locked by the lock ring 40.
It is possible to prevent the disengagement from the one tube 1 by locking it to.

FIG. 5 shows still another embodiment. In this embodiment, the heat insulating material 4 on the other end side of both pipes 1 and 2 is cut out from the outer pipe 5 by a predetermined length. Further, the outer diameter of the large-diameter portion wall 58 of the push wheel 57 is formed to be smaller than that of the outer pipe 5, and an annular recessed groove 59 is formed on the outer surface of the large-diameter portion wall, which is pressed against the inner surface of the outer pipe 5. A watertight rubber ring 60 is provided. Although the other parts are slightly different in shape and the like, they have substantially the same configuration as the embodiment of FIG. 3, and therefore, the same parts are denoted by the same reference numerals and the description thereof will be omitted.

Also in this embodiment, the same operation as the above-mentioned embodiment is achieved. Moreover, in this embodiment,
Since the outer diameter of 57 is substantially the same as the outer diameter of both pipes 1 and 2, piping and centering at the time of piping are easy.

FIG. 6 shows still another embodiment. In this embodiment, the heat insulating material 4 and the outer pipe 5 on one end side of both pipes 1 and 2 are notched over a predetermined length, and are received only by the pipe body 3. A mouth 6 is formed. Reference numeral 62 denotes a push wheel, which is fastened and fixed to the receiving port 6 with a bolt nut 63. This push ring 62 and the socket 6 of the one tube 1
The outer peripheral surface of is covered with a heat insulating material 64 and a cover body 65. One end of the cover body 65 and the connecting portion of the push ring 62 are covered with an annular water stop cover 66, and the other end of the cover body 65 and the connecting portion of the outer pipe 5 of the one pipe 1 are connected with an annular water stop cover 67. Is covered. Although the other parts are slightly different in shape and the like, they have substantially the same structure as the embodiment of FIG. 1 or FIG. 2, and therefore, the same parts are denoted by the same reference numerals and the description thereof will be omitted.

Also in this embodiment, the same operation as the above-mentioned embodiment is achieved. Moreover, in this embodiment, since the heat insulating material 64 is disposed between the receiving port 6 and the push ring 62 and the cover body 65, the filling of the heat insulating material 64 is loose even if the other tube 2 comes out. Heat insulation performance becomes more reliable.

[0026]

Since the invention of claim 1 has the above-mentioned constitution, even if the joint portion expands or contracts or bends in the heat insulating pipeline for some reason, the watertightness of the joint portion can be sufficiently maintained. In addition, it is possible to form a long-distance pipeline for cold / hot water, which is excellent in heat retention of the fluid in the pipeline without causing performance deterioration due to water absorption of the heat insulating material. In the invention of claim 2, since the push ring is further divided into two, the push ring itself is provided with flexibility, and higher bending performance can be obtained.
The third seal member can also secure the watertightness of the divided portion.
According to the invention of claim 3, the watertightness of the joint portion is further improved by the third seal member. According to the invention of claim 4, since the push ring and both pipes have substantially the same diameter, the piping and the centering at the time of the piping are further facilitated. According to the invention of claim 5, even if the other pipe comes out, the filling of the heat insulating material arranged in the joint portion does not become loose, the heat insulating performance becomes more reliable, and the construction at the site becomes easy. . In the invention of claim 6, the watertight cover further improves the watertightness between the tube body and the outer tube. In the invention of claim 7, the lock ring can surely prevent the pipe from coming out, and the watertightness effect is further enhanced.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view of a joint device showing an embodiment of the present invention.

FIG. 2 is a vertical sectional front view of a joint device according to another embodiment.

FIG. 3 is a vertical sectional front view of a joint device according to still another embodiment.

FIG. 4 is an enlarged vertical sectional front view of a portion A of FIG.

FIG. 5 is a vertical sectional front view of a joint device according to still another embodiment.

FIG. 6 is a vertical sectional front view of a joint device according to still another embodiment.

FIG. 7 is a vertical sectional front view of a conventional joint device.

[Explanation of symbols]

 1 One pipe 2 The other pipe 3 Pipe body 4 Insulation material 5 Outer pipe 6 Receptacle 10 Insertion opening 11, 21, 47, 60 Watertight rubber ring 13, 27, 43, 57, 62 Pushing ring 17, 30 Pressing part 23, 32, 48, 63 Bolt nut 25, 64 Insulation 26 Water stop cover 39 Annular protrusion 40 Lock ring

Claims (7)

(57) [Claims] 1. A pipe having an outer peripheral surface of a pipe body covered with a heat insulating material and an outer pipe and a receiving opening formed at one end, and like this pipe, the outer peripheral surface of the pipe body has a heat insulating material and an outer pipe. The other end is covered with a heat insulating material and the outer pipe is cut out over a predetermined length and the other pipe is formed with an insertion opening only by the main body of the pipe. The opening is inserted, and an annular first seal member is interposed between the outer surface of the inserted insertion opening and the inner surface of the receiving opening, and a pressing portion for pressing the first sealing member toward the insertion opening end side is provided. A push ring having at one end and a fitting portion at the other end that fits into the outer pipe of the other pipe is fixed to the receiving port of one pipe by a fastening member. An annular second seal member is interposed between the inner surface and the outer surface of the outer pipe of the other pipe, and is surrounded by the second seal member and the inner surface of the push ring, and the first seal member and the outer surface of the insertion opening. A joint device for a heat insulating pipe, characterized in that the hollow space filled with the heat insulating material. 2. The pressing wheel has a first pressing wheel portion having at one end thereof a pressing portion for pressing the first sealing member toward the insertion end side, and a fitting portion at one end thereof which fits into the outer tube of the other tube. An intermediate portion is divided into a second push ring portion and a third seal member is provided between the divided outer surface of the first push ring portion on the other end side and the inner surface of the divided second push ring portion on the other end side. The joint device for a heat insulating pipe according to claim 1, which is interposed. 3. The heat insulating pipe joint device according to claim 1, wherein an annular third seal member is interposed between the inner surface near the pressing portion of the push wheel and the outer surface of the insertion opening of the other tube. 4. A pipe having an outer peripheral surface of a pipe main body covered with a heat insulating material and an outer pipe and having a receiving end formed at one end, and the outer peripheral surface of the pipe main body having the heat insulating material and the outer pipe like this pipe. And the outer tube is notched at the other end over a specified length,
Further, the heat insulating material is provided with a cutout for a predetermined length from the outer tube and the other tube in which the insertion opening is formed only by the tube main body, and the insertion opening of the other tube is inserted into the receiving opening of one tube, and this insertion An annular first seal member is interposed between the outer surface of the inserted insertion port and the inner surface of the receiving port, and has a pressing portion at one end portion for pressing the first sealing member toward the insertion opening end side, and A push ring having a fitting portion formed at the end portion with a diameter smaller than that of the outer pipe of the other pipe and fitted into the outer pipe is fixed to the receiving opening of the one pipe by a fastening member,
An annular second seal member is interposed between the outer surface of the fitting portion of the push ring and the inner surface of the outer pipe of the other pipe, and the second seal member and the inner surface of the push ring, the first seal member, and the insertion port are inserted. A joint device for a heat insulating pipe, characterized in that a space surrounded by an outer surface is filled with a heat insulating material. 5. A pipe in which the outer peripheral surface of the pipe main body is covered with a heat insulating material and an outer pipe, and the heat insulating material and the outer pipe are cut out at one end over a predetermined length to form a receptacle only by the pipe main body. , The outer peripheral surface of the pipe body is covered with a heat insulating material and an outer pipe like this pipe,
The other end is equipped with a heat insulating material and the outer pipe, which is notched over a predetermined length and has the other pipe formed with the pipe body only, and the other pipe is inserted into the receiving mouth of one pipe. An annular first seal member is interposed between the outer surface of the inserted opening and the inner surface of the receiving opening, and a pressing portion for pressing the first seal member toward the insertion opening end is provided at one end. And a push ring having a fitting portion at the other end that fits into the outer pipe of the other pipe is fixed to the receiving port of the one pipe by a fastening member, and the inner surface of the fitting portion of the push wheel and the other An annular second seal member is interposed between the outer surface of the tube and the outer surface of the tube, and the outer peripheral surface of the push ring and the receiving port of the one tube is covered with a heat insulating material and a cover body, and one end portion of the cover body And the connecting portion of the push ring is covered with the first annular water-stop cover, and the connecting portion between the other end of the cover body and the outer pipe of one of the pipes is annular. Coupling device of the thermal insulation tube and being covered by a water stop cover. 6. The pipe-shaped main body of one of the pipes and the connecting portion of the receiving-side end of the outer pipe are covered with an annular water-stop cover.
5. The joint device for a heat insulating pipe according to any one of items 1 to 4. 7. An annular receiving groove is formed on the inner surface of the receiving opening of one of the pipes, and the receiving groove has a diameter that can be expanded and contracted by dividing the receiving pipe in the circumferential direction. The heat insulating pipe joint device according to claim 1, wherein a lock ring that can be locked is fitted to a protrusion provided on the outer surface of the mouth.