JP5992230B2 - Swivel joint - Google Patents

Description

  The present invention relates to a swivel joint that is provided in the middle of a transport pipeline for liquids and fluids such as moisture and oil, and is used as a connecting member when extending the transport pipeline.

  Various pipes such as sewage pipes, water pipes, gas pipes and oil type pipelines are buried in the ground. These pipes are indispensable for the daily life of mankind, but of course it is inconvenient to install them on the ground. For this reason, these pipelines are buried in the ground and used as buried pipes.

  For such buried pipes, the standard of use period is determined by standards and regulations. For example, when the use period of 30 years elapses, replacement and maintenance are required. In addition, periodic inspections are performed outside the usage period, and replacement and maintenance are performed as necessary.

  Here, since the buried pipe conveys a liquid or a fluid to the inside, the inner surface often deteriorates. For this reason, the passage of the use period and the replacement and maintenance in the inspection are often caused by the deterioration of the internal surface. When exchanging the buried pipe, the buried pipe buried in the ground may be dug up and replaced. However, excavating and exchanging the buried pipe has a problem in that (1) excavation work, (2) exchange work, (3) buried work, and (4) the buried pipe itself are costly. In addition, buried pipes such as sewage pipes and water pipes are buried in a living area like a mesh, and exchanging them by excavation involves various difficulties.

  For this reason, in the maintenance and repair accompanying the deterioration of the buried pipe, the replacement is the final means, and it is required to repair the deterioration of the buried pipe while the buried pipe is buried in the ground. The deterioration of the buried pipe includes bending and breakage of the buried pipe, but most of them are deterioration of the inner surface as described above. For example, impurities adhere to the inner surface of the buried pipe, or the inner surface itself is altered. At this time, if the buried pipe is cracked and not damaged, the repair of the buried pipe can be completed by repairing only the inner surface.

  When impurities are fixed on the inner surface of the buried pipe or the inner surface is altered in this way, a material made of resin or the like called liner material is attached to the buried pipe. . By attaching the liner material to the inner surface of the buried pipe, there is no exposure of fixed matter or alteration on the inner surface. If there is no exposure of such fixed matter or alteration, the quality of the liquid or fluid transported inside the buried pipe will be eliminated. These are particularly effective for sewer pipes and water pipes.

  If such a liner material is attached to the inner surface of the buried pipe, the work can be performed without digging up the buried pipe. For example, a liner material is introduced from a longitudinal provided in the middle of the buried pipe, and a certain pressure is applied to push the liner material into the buried pipe. After the liner material is pushed into the buried pipe, the liner material is attached to the inner surface of the buried pipe by heat treatment or the like.

  At this time, in order to push the liner material inserted into the buried pipe inside the buried pipe, water discharge by a water discharge device may be given to the tip of the bag-like liner material. The liner material is inserted into the buried pipe in the form of a bag with a closed tip. By applying a water pressure from the inside of the bag-shaped tip, the liner material is opened while proceeding through the buried pipe. As a result, the liner material reaches the required position of the buried pipe, and the inside of the buried pipe is mounted with the liner material.

  For the application of the water pressure, a water discharge device which is a variety of devices capable of applying the water pressure is used. The water discharge device is equipped with a water discharge hose to discharge water. At this time, as the liner material advances inside the buried pipe, it is also necessary to advance the water discharge portion of the water discharge device. For this reason, it is necessary to connect the next water discharge hose to the water discharge hose one after another. A coupler called a swivel joint is used to connect the water discharge hoses. Several techniques have been proposed for swivel joints (see, for example, Patent Document 1 and Patent Document 2).

JP 2011-69436 A JP 2011-220469 A

  Patent Document 1 discloses a swivel joint that is bent in an L shape and has little pressure loss. It is suitable for connecting a water discharge hose in the part which transfers to a buried pipe from the vertical resistance by bending in L shape. However, since most of the buried pipes have straight sections, the swivel joint disclosed in Patent Document 1 is not suitable for connecting the water discharge hose in such a place.

  Patent Document 2 discloses a swivel joint in which a sliding portion between a ball and a packing portion is provided with a fluid conveyance path side seal portion that prevents lubricating oil from entering the packing portion. The swivel joint disclosed in Patent Document 2 improves usability and accuracy because there is no leakage of lubricating oil.

  However, the swivel joint disclosed in Patent Document 2 has a problem that it does not rotate when used for connecting a water discharge hose. The same applies to the swivel joint disclosed in Patent Document 1. In the swivel joints of the prior art represented by Patent Documents 1 and 2, when connecting the water discharge hose, the swivel joint itself does not rotate.

  On the other hand, the water discharge hose which is connected to the swivel joint and finally discharges water has a problem of causing twist as it advances through the buried pipe. Depending on the length of the buried pipe, the water discharge hose must travel a distance of several tens of meters. This is because the water discharge hose advances its tip as the liner material advances. As the tip of the water discharge hose advances, the length of the water discharge hose that extends is increased. In this case, pressure based on various direction vectors is applied over the entire water discharge hose, and the water discharge hose may be twisted.

  When such a twist to the water discharge hose occurs, if the swivel joint does not rotate, the water discharge hose remains in a twisted state. When the twist becomes strong, a part of the water discharge hose is bent or broken. If it becomes like this, a water discharge hose will not be able to convey water and will not be able to give water pressure to push forward a liner material. Alternatively, the water discharge hose cannot apply the amount of heat for curing the liner material to the liner material with warm water or hot water.

  As represented by Patent Documents 1 and 2, various swivel joints have been proposed. However, since the swivel joint does not rotate when connecting the water discharge hose, there is a problem that flexible use of the water discharge hose becomes difficult. For example, when the water discharge hose is pushed forward with respect to the liner material inside the buried pipe, there is a problem that the water discharge pressure becomes insufficient due to twisting or bending of the water discharge hose. Further, there is a problem that water discharge pressure is insufficient due to twisting or bending of the water discharge hose even when heat is applied to the liner material.

  In particular, the swivel joint of the prior art assumes only connecting a water discharge hose and a pipe line, but does not assume pushing the connected water discharge hose and pipe line while discharging water. For this reason, it is considered that the swivel joint did not rotate, leaving problems such as a water discharge hose and a bent pipe.

  An object of this invention is to provide the swivel joint which can push forward the connected water discharge hose, without producing the problem that the water discharge hose to connect bends or breaks. In particular, an object of the present invention is to provide a swivel joint for connecting a water discharge hose used when a liner material for repairing the inside of an embedded pipe is mounted.

In view of the above problems, the swivel joint of the present invention is a swivel joint that connects the first path and the second path that apply pressure to the protective member mounted inside the buried pipe, and is connected to the first path. A first connecting member; a second connecting member connected to the second path; and a coupling member that couples the first connecting member and the second connecting member, and at least one of the first connecting member and the second connecting member. is Ri rotatably der in a state bound by a coupling member, the first path is connected to a pressure source, the second path is connected to the outlet, coupling with the first connecting member and the second connecting member coupling member In this state, only the second connecting member can rotate, the second connecting member has an opening facing the discharge port, and the opening is a gap along the rotation outer periphery of the second connecting member.

  Since the swivel joint of the present invention can be rotated even if the water discharge hose is connected, it is difficult to cause the water discharge hose to twist. Further, it does not cause the water discharge hose to be bent or broken to make water discharge difficult. As a result, the repair work of attaching the liner material to the buried pipe using the water discharge hose is appropriately performed.

  When the buried pipe is properly repaired, the replacement frequency of the buried pipe can be reduced, and the cost required for managing a system (such as a sewage system or a water supply system) using the buried pipe can be reduced. This cost reduction can reduce social infrastructure maintenance costs.

It is explanatory drawing explaining the repair operation | work of the buried pipe in Embodiment 1 of this invention. It is a side view of the swivel joint in Embodiment 1 of the present invention. It is a side view which shows the connection of the swivel joint and 2nd path | route in Embodiment 1 of this invention. It is a perspective view of the 2nd connection member in Embodiment 1 of the present invention. It is a perspective view of the coupling member in Embodiment 1 of this invention. It is coupling | bonding explanatory drawing of the swivel joint in Embodiment 1 of this invention.

A swivel joint according to a first aspect of the present invention is a swivel joint that connects a first path and a second path that apply pressure to a protective member mounted inside a pipe, and is connected to the first path. A first connecting member, a second connecting member connected to the second path, and a coupling member that couples the first connecting member and the second connecting member, and at least one of the first connecting member and the second connecting member one is Ri rotatably der in a state bound by a coupling member, the first path is connected to a pressure source, the second path is connected to the outlet, with the first connecting member and the second connecting member coupling member In the coupled state, only the second connecting member can rotate, the second connecting member has an opening facing the discharge port, and the opening is a gap along the rotation outer periphery of the second connecting member. .

  With this configuration, twisting of the water discharge hose to which the swivel joint is connected is eliminated. With this configuration, the swivel joint can eliminate the twist on the discharge port side such as the water discharge hose. With this configuration, the swivel joint can also perform auxiliary water discharge. With this configuration, the second connection member can realize rotation and water discharge.

  In the swivel joint according to the third aspect of the present invention, in addition to the second aspect, the coupling member has a bearing facing the outer periphery of the second connection member.

  With this configuration, the second connection member can rotate with respect to the coupling member.

  In the swivel joint according to the sixth aspect of the present invention, in addition to any one of the first to fifth aspects, the coupling member has an internal space, and at least one of the first connection member and the second connection member is Inserted into the internal space and combined.

  With this configuration, the swivel joint can be used easily.

  In the swivel joint according to the seventh aspect of the present invention, in addition to the sixth aspect, the internal space has a packing that contacts at least one of the first connection member and the second connection member.

  With this configuration, the waterproofness of the swivel joint is enhanced.

  In the swivel joint according to the eighth aspect of the present invention, in addition to any of the first to seventh aspects, at least one of the first connection member and the second connection member is rotated by the pressure due to the twist of the second path. To do.

  With this configuration, the swivel joint can prevent water discharge problems such as a water discharge hose.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  (Embodiment 1)

(Repair of buried pipe)
First, repair of a buried pipe using a protective material called a liner material will be described. A swivel joint is used to repair the buried pipe. The swivel joint has the following features: (1) Connection of a water discharge hose that applies pressure to stretch the liner material attached to the inner surface of the buried pipe, and (2) Adhering of the liner material attached to the inner surface of the buried pipe Therefore, it is used either for connection of water discharge hoses for high temperature water or high temperature steam spraying.

(Description of (1) work)
FIG. 1 is an explanatory view for explaining a buried pipe repairing operation according to Embodiment 1 of the present invention. FIG. 1 (A) shows a state after the repair is started, and FIG. 1 (B) shows a state where the repair has progressed considerably.

  The buried pipe 100 is buried in the ground. The buried pipe 100 is various pipes required for social infrastructure such as a sewer pipe, a water pipe, and a gas pipe. If it is a sewage pipe, drain water from the home or factory, and if it is a sewage pipe, water that has been purified at the water purification plant is passed. In any case, the buried pipe 100 is important for the social infrastructure, and is buried in the ground in order to minimize the influence on the social life.

  Since the buried pipe 100 needs to carry various things such as sewage and clean water according to the purpose, the inner surface 101 of the buried pipe 100 deteriorates with time. The buried pipe is often formed of concrete, but the deterioration of the internal surface 101 is unavoidable due to deterioration due to transport of liquids such as sewage and clean water, and solids and impurities mixed in the liquid. If the deterioration progresses, the buried pipe 100 may be cracked or damaged, which may cause a disaster such as water leakage in the ground.

  In consideration of the prevention of such a disaster, repair is performed in which the deterioration of the inner surface 101 of the buried pipe 100 is covered with a protective material called a liner material 110.

  Of course, the buried pipe 100 is buried in the ground. Although the diameter of the buried pipe 100 varies, it is difficult for an operator to enter and to attach the liner material 110 to the inner surface 101. Of course, there are dangers associated with working underground. In the operation shown in FIG. 1A, the liner material 110 is attached to the inner surface 101 by the insertion of the liner material 110 from the longitudinal 102 connected to the buried pipe 100.

  First, the heavy machine 120 is installed in the vertical line 102 connected to the buried pipe 100. The heavy machine 120 puts the liner material 110 into the buried pipe 100 from the longitudinal 102. Here, the liner material 110 is a cylindrical material having flexibility such as resin, rubber, and vinyl chloride. Since the liner material 110 has flexibility, the tip portion turned upside down can be put into a cylindrical shape. In FIG. 1 (A), the tip of the liner material 110 is turned over to enter the cylindrical half of the liner material 110.

  A water discharge hose 130 is attached inside the liner material 110. The water discharge hose 130 discharges water from the inside of the liner material 110 to the tip thereof to apply water pressure. The water discharge hose 130 is connected to the heavy machine 120, and the heavy machine 120 supplies water to the water discharge hose 130. Further, the hydraulic pressure applied to the water discharge hose 130 by the heavy machine 120 is adjusted. The liner material 110 woven inward gradually extends toward the tip by the water pressure from the water discharge hose 130 (the woven portion spreads forward so that the woven portion is woven back from the cylindrical tip. To go).

  FIG. 1B shows a state extending forward. Due to the water pressure from the water discharge hose 130, the bent tip of the liner material 110 is extended, and reaches the next longitudinal force 103 that allows work from the ground. Thus, by applying water pressure from the inside of the cylindrical liner material 110 and pushing the liner material 110 forward, the liner material 110 is spread over the entire inner surface 101 of the buried pipe 100 from the longitudinal resistance 102 to the longitudinal resistance 103. Make it.

  Here, the water discharge hose 130 needs to apply water pressure to the tip of the liner material 110. Since the liner material 110 advances while expanding the woven tip, the tip of the water discharge hose 130 needs to gradually grow. For this reason, the water discharge hose 130 needs to be jointed over several steps. In FIG. 1, the water discharge hose 130 is connected by a swivel joint 140. The swivel joint 140 connects the rear water discharge hose and the front water discharge hose. In the entire water discharge hose 130, one or a plurality of swivel joints 140 are used.

  Here, the water discharge hose 130 receives water pressure when discharging water. Due to the water pressure, the tip of the water discharge hose 130 (the hose portion connected to the front of the most advanced swivel joint 140) may be twisted or bent. This is because the water discharge hose 130 itself is formed of a flexible material such as vinyl chloride or rubber, and thus can be twisted by water pressure. If twisting or bending occurs, the water discharge hose 130 cannot apply sufficient water pressure to the liner material 110. If this happens, there will be a problem that the tip of the liner material 110 cannot reach the longitudinal length 103 which is the target position.

(Description of (2) work)
After the liner material 110 has spread over the entire inner surface 101 of the buried pipe 100 (in a state where the liner material 110 is mounted on the inner surface 101 of the buried pipe 100), the water discharge hose 130 liners high-temperature hot water or high-temperature steam. The material 110 is filled. Also at this time, the water discharge hose 130 applies warm water and steam to the liner material 110. At this time, not only hot water and steam are discharged from the tip (discharge port) of the water discharge hose 130, but may also be discharged from discharge ports provided at a plurality of locations in the middle of the water discharge hose 130.

  The liner material 110 is fixed to the inner surface 101 by applying a high temperature while having flexibility. By this fixing, the liner material 110 is completely attached to the inner surface 101 of the buried pipe 100, and the repair is completed.

  Since the liner material 110 is formed of a material having durability and contamination resistance as well as flexibility such as resin, rubber, and vinyl chloride, when the liner material 110 is attached to the inner surface 101, the service life of the buried pipe 100 is extended. . Of course, since the liner material 110 is surface-treated, the inside of the buried pipe 100 is cleaned, and the usability as a sewer pipe or a water pipe is improved.

  Again, the water discharge hose 130 may need to be connected. Of course, the water discharge hose 130 may be twisted by the pressure of discharge. Also in this case, there is a problem that the fixing of the liner material 110 does not proceed sufficiently or uneven fixing occurs.

  Although the swivel joint of the prior art cannot absorb the twist of the water discharge hose to be connected, the swivel joint of the present invention can absorb the twist of the water discharge hose, thereby solving such a problem.

(Overview of swivel joint overall)
FIG. 2 is a side view of the swivel joint according to Embodiment 1 of the present invention. The swivel joint 1 is used as the swivel joint 140 in the repair work of FIG. The swivel joint 1 connects the first path and the second path of the water discharge hose that applies pressure to the liner material 110 that is a protective material attached to the inner surface 101 of the buried pipe 100. The swivel joint 1 is used when a plurality of water discharge hoses are connected. It should be noted that applying the pressure to the liner material 110 is as described above. (1) When applying a pressure for extending the liner material 110 attached to the inner surface 101 of the embedded pipe 100 inside the embedded pipe 100 (2) This is either when high-temperature water or high-temperature steam is applied to fix the liner material 110 attached to the inner surface 101 of the buried pipe 100. Below, it demonstrates as the same thing in either case of this (1) and (2).

  In FIG. 2, the path through which the liquid to be discharged passes through the water discharge hose to be connected (not only a member generally grasped as a so-called hose, but also any member that can discharge water), the first path 2 and the first path. This will be described as being defined as two-path 3. Each of the first path 2 and the second path 3 is an example of a water discharge hose (or a part thereof) connected by the swivel joint 1.

  The swivel joint 1 includes a first connection member 4, a second connection member 5, and a coupling member 6. The first connection member 4 is connected to the first path 2. If the 1st path | route 2 is a water discharge hose, the 1st connection member 4 will be fitted and connected with this water discharge hose. The second connection member 4 is connected to the second path 3. If the 2nd path | route 3 is a water discharge hose, the 2nd connection member 4 will be fitted and connected with this water discharge hose.

  The coupling member 6 couples the first connection member 4 and the second connection member 5. By this coupling, the first connecting member 4 and the second connecting member 5 are connected. By connecting the first connection member 4 and the second connection member 5, the first path 2 and the second path 3 are also connected, and the water discharge hose 130 can be extended corresponding to the extension of the liner material 110.

  Here, at least one of the first connection member 4 and the second connection member 5 coupled by the coupling member 6 is rotatable in a coupled state.

  The 1st path | route 2 and the 2nd path | route 3 carry water, when providing a water pressure. When applying hydraulic pressure, the oil liquid is transported. Compressed air is transported when air pressure is applied. In transporting these liquids and gases, either the first path 2 or the second path 3 may be twisted. If the twist becomes stronger, as described above, the first path 2 and the second path 3 are bent, and the liquid or gas to be transported may not be transported. If it becomes so, it will become impossible to extend | stretch the liner material 110 used for repair of a buried pipe.

  However, in the swivel joint 1 in the first embodiment, at least one of the first connection member 4 and the second connection member 5 can rotate in the coupled state. Even if the first path 2 or the second path 3 such as a water discharge hose is twisted, the twist is eliminated by rotating the first connection member 4 or the second connection member 5 causing the twist. . In other words, the rotation of the first connection member 4 and the second connection member 5 can absorb the twist of the first path 2 and the second path 3.

  In FIG. 1, the state in which the second connecting member 5 rotates is indicated by an arrow A. Of course, the second connecting member 5 may rotate not only in the direction of the arrow A but also in the direction opposite to the arrow A.

  Here, for example, it is assumed that the first path 2 is connected to the pressure source and the second path 3 is connected to the discharge port. That is, a water source such as the heavy machine 120 shown in FIG. 1 is connected to the first path 2, and the second path 3 is connected to the first path 2 via the swivel joint 1. The second path 3 is connected to a discharge port for finally discharging water, and discharges water to the liner material 110. Each of the 1st path | route 2 and the 2nd path | route 3 is a water discharge hose (part).

  At this time, the water discharge pressure from the discharge port is easily applied to the second path 3. Depending on the angle and pressure relationship with the liner material at the water discharge destination, the discharge port bends or twists. As a result, the second path 3 connected to the discharge port is twisted during the water discharge. The 1st path | route 2 is hard to twist by being connected with the water source and not being connected directly with the discharge port. For this reason, when the 2nd path | route 3 is connected with the discharge port, it is suitable for the 2nd connection member 5 to rotate.

  The rotation of the second connection member 5 is rotation with the coupling member 6 as a reference. For this reason, when the 2nd path | route 3 produces a twist, it is enough for only the 2nd connection member 5 to rotate. As the second connecting member 5 rotates, the twist of the second path 3 is absorbed. Since the twist is absorbed with reference to the coupling member 6, the first path 2 that is the front side (water source side) of the coupling member 6 is not twisted. Alternatively, the twist is absorbed in accordance with the rotation of the second connecting member 5.

  Since at least one of the first connecting member 4 and the second connecting member 5 can rotate with respect to the coupling member 6, the twist of the first path 2 and the second path 3 which are flexible members such as a water discharge hose is eliminated. Is done. If the twist is eliminated, the first path 2 and the second path 3 are not bent, and water discharge (including water, oil, compressed air, etc.) is maintained. If the water discharge is maintained, the application of pressure to the liner material 110 is maintained, and the necessary stretching of the liner material 110 inside the buried pipe 100 can be completed.

  Further, after the liner material 110 is stretched to a necessary position, when the liner material 110 is fixed to the inner surface 101 of the buried pipe 100, the first path 2 and the second path 3 give high-temperature water and hot air. Sometimes. Also in this case, since it is necessary to spread the high temperature water and hot air uniformly over the liner material 110, it is not preferable that the first path 2 and the second path 3 are twisted. Even in such a case, since at least one of the first connecting member 4 and the second connecting member 5 can rotate, the twisting does not occur and an optimal operation is performed.

  Moreover, the water discharge hose etc. which are comprised by the 1st path | route 2 and the 2nd path | route 3 may be connected over many steps. In this case, a plurality of swivel joints 1 are used. Also in this case, at least one of the first connecting member 4 and the second connecting member 5 of the swivel joint 1 is rotatable with respect to the connecting member 6, so that the twist generated in various places of the water discharge hose can be absorbed. Can be eliminated.

  As described above, the swivel joint 1 according to the first embodiment eliminates the twist of the water discharge hose and the like that applies pressure to the protective material (the liner material 110) attached to the inside of the buried pipe 100, and the inner surface of the buried pipe 100 A protective material can be reliably attached to 101.

  Next, details and assembly of each part of the swivel joint 1 will be described.

(First route, second route)
The first path 2 and the second path 3 are a water discharge hose and a steam carrying hose that apply pressure to the liner material 110. Since they are connected by the swivel joint 1, each of the first path 2 and the second path 3 may be grasped as a part of a water discharge hose or a steam carrying hose.

  Moreover, since the swivel joint 1 is provided in multiple stages, the water discharge hose and the steam carrying hose are also connected in multiple stages. The first and second of the first path 2 and the third path 3 do not indicate the limited meaning of the elements, but a certain swivel joint 1 (if a plurality of swivel joints 1 are used, In one swivel joint 1), the side connected to the first connecting member 4 is defined as the first path 2, and the side connected to the second connecting member 5 is defined as the second path 3.

  Since each of the first path 2 and the second path 3 is a water discharge hose or a steam carrying hose, it is formed of a flexible material such as resin, rubber, or vinyl chloride. Moreover, since each of the first path 2 and the second path 3 is a water discharge hose or a steam carrying hose (part of it), at least one of water, hot water, oil, and air necessary for repairing the buried pipe 100 is used. Transport. The first path 2 is connected to a pressure source that supplies any one of these water, hot water, oil, and air. Any of water, hot water, oil, and air released from the pressure source is conveyed through the first path 2.

  Moreover, the 2nd path | route 3 discharge | releases any of the conveyed water, hot water, oil, and air from a discharge port. The discharge port is provided at the tip of the second path 3. Alternatively, when the swivel joint 1 is further connected to the tip of the second path 3, a discharge port is provided at the tip of the next connected second path 3.

(First connection member)
The first connection member 4 is connected to the first path 2 by fitting. Further, it is connected to the second connection member 5 through the coupling member 6.

  The first connecting member 4 has an opening on the front and back and a passage connecting the openings on the front and back. The first path 2 is connected to the first connection member 4 by fitting into the opening. The first connection member 4 is formed of a metal or an alloy. This is because it is required to cope with a strong water pressure, so that sufficient strength and durability are required.

  The tip of the first connection member 4 (the end opposite to the side connected to the first path 2) is connected to the coupling member 6. At this time, the coupling member 6 has an opening that can accommodate one of the first connection members 4, and the first connection member 4 is coupled to the opening of the coupling member 6 so as to be coupled. Connected to member 6.

  The first connection member 4 connects the first path 2. The first path 2 may be connected by being inserted into the opening of the first connecting member 4, or the first path 2 may be connected by inserting the first connecting member 4 inside. good. When the first connection member 4 is connected by being inserted into the first path 2, it is also preferable that the first connection member 4 is provided with a non-slip 45. The anti-slip 45 improves the connection strength when the first connection member 4 is inserted into the first path 2 and connected.

(Second connection member)
The second connection member 5 is connected to the second path 3 and is connected to the first connection member 4 via the coupling member 6. By connecting the first connection member 4 and the second connection member 5, the swivel joint 1 can extend the water discharge hose and the like.

  FIG. 3 is a side view showing the connection between the swivel joint and the second path in the first embodiment of the present invention. The second path 3 is fitted and connected to the second connection member 5. Since the 2nd path | route 3 is a flexible pipe line like a water discharge hose, it is inserted in the opening part of the 2nd connection member 5 and connected like the case of the 1st path | route 2 and the 1st connection member 4. May be. Alternatively, conversely, the second connection member 5 may be inserted and connected to the opening of the second path 3. In the latter case, similarly to the first connection member 4, the second connection member 5 is preferably provided with a non-slip 55.

  FIG. 4 is a perspective view of the second connecting member according to Embodiment 1 of the present invention. The second connecting member 5 has an internal space 51, and the second path 3 may be inserted into the internal space 51.

  The second connection member 5 is rotatable with respect to the coupling member 6. Moreover, the 2nd path | route 3 connected to the 2nd connection member 5 produces a twist by water discharge etc. FIG. For example, the second path 3 causes twisting in the direction of the arrow B. If this twist is left, it becomes difficult to discharge water through the second path 3, but since the second connecting member 5 can rotate as indicated by the arrow A, the twist is eliminated. Of course, when the twisting direction of the second path 3 is opposite to the arrow B, the second connecting member 5 can rotate in the opposite direction to the arrow A to eliminate twisting.

  The second connecting member 5 can rotate even after being coupled to the coupling member 5. For example, the coupling member 6 includes a bearing that faces the outer periphery of the second connection member 5. The bearing may be a ball bearing or another bearing. By this bearing, the second connecting member 5 can rotate with respect to the coupling member 6 even after being coupled to the coupling member 6. In addition, when the 1st connection member 4 can rotate with respect to the coupling member 6, it should just be connected by a bearing etc. similarly to the relationship between the 2nd connection member 5 and the coupling member 6. FIG.

(Coupling member)
The coupling member 6 couples the first connection member 4 and the second connection member 5. The swivel joint 1 is configured by coupling by the coupling member 6. FIG. 5 is a perspective view of the coupling member according to Embodiment 1 of the present invention. The coupling member 6 may be a separate member independent of the first connection member 4 and the second connection member 5, or may be a member integrated with the second connection member 5 as can be seen in FIG. 2 and the like. .

  In FIG. 5, the coupling member 6 is represented as a member integrated with the second connection member 5. In the second connection member 5, a portion connecting the first connection member 4 is grasped as a coupling member 6.

  The coupling member 6 has an internal space 62, and the first connecting member 4 is inserted into the internal space 62 for connection. At this time, the coupling member 6 includes a stopper 61, and the fitting with the inserted first connection member 4 is determined by bending the stopper 61. Further, in FIG. 5, the second connecting member 5 and the coupling member 6 are integrated and the first connecting member 4 is inserted into the coupling member 6. However, when the coupling member 6 is independent or When it is integral with the first connection member 4, the second connection member 5 is inserted into the internal space 62 of the coupling member 6 and coupled. These may be determined according to the ease of manufacture and use.

  Moreover, the internal space 62 has the packing 63 which contacts the 1st connection member 4 (or 2nd connection member 5) inserted. The packing 63 is a material and member having both flexibility and waterproof properties such as resin, rubber, and vinyl chloride, and prevents water leakage between the first connection member 4 fitted to the coupling member 6. . The packing 63 may be an O-ring. The swivel joint 1 can prevent unnecessary water leakage by the packing 63.

  FIG. 6 is a coupling explanatory diagram of the swivel joint in Embodiment 1 of the present invention. As shown in FIG. 6, the swivel joint 1 is put into use by inserting the first connection member 4 into the internal space 62 of the coupling member 6 that is integral with the second connection member 5.

  As described above, when the first connecting member 4 and the second connecting member 5 are connected to the coupling member 6, the swivel joint 1 is configured. In the swivel joint 1, at least one of the first connection member 4 and the second connection member 5 can rotate with respect to the coupling member 6. The first connection member 4 or the second connection member 5 rotates according to the pressure caused by the twist of the first path 2 or the second path 3. By this rotation, the twist of the first path 2 and the second path 3 is eliminated.

  As described in the use mode of the swivel joint 1, the swivel joint 1 is connected to a water discharge hose that applies pressure for extending the liner material 110 attached to the inner surface 101 of the buried pipe 100 inside the buried pipe 100. (2) For fixing the liner material 110 attached to the inner surface 101 of the buried pipe 100, it is used for either connection of a water discharge hose for high temperature water or high temperature steam spraying. In either case, the water discharge hose (the first path 2 and the second path 3) may be twisted by the pressure during water discharge, but at least one of the first connection member 4 and the second connection member 5 is The twist can be eliminated by being able to rotate on the basis of the coupling member 6. If the twist can be eliminated, work defects are unlikely to occur, and the work of repairing the buried pipe 100 is made more efficient.

  In addition, it is also preferable that at least one of the first connecting member 4 and the second connecting member 5 has a predetermined upper limit (rotation speed, rotation angle, rotation angular velocity, etc.). By having a predetermined upper limit, there is no reverse problem caused by excessive rotation.

  The swivel joint 1 in the first embodiment is optimally used for connecting a water discharge hose or the like for attaching or fixing a liner material 110 as a protective material to the inner surface 101 of the buried pipe 100.

  (Embodiment 2)

  Next, a second embodiment will be described. The second connecting member 5 of the swivel joint 1 also preferably has an opening 53 facing the discharge port side as shown in FIG. The opening 53 is a gap provided along the rotation circumference of the second connection member 5. In order to realize the rotation of the second connection member 5, a gap along the rotation circumference may be formed. When the inside of the gap is waterproofed with a waterproofing member (such as packing), the opening 53 does not occur, but if it is not waterproofed, the opening 53 occurs. The opening 53 can leak water in accordance with water discharge.

  The water discharge hose to which the swivel joint 1 is connected discharges water, hot water, steam and the like in order to stretch and fix the liner material 110. At this time, if water or hot water can be ejected from the opening 53 of the second connecting member 5, fountain is possible over a wide area. When the liner material 110 that has been stretched is fixed by heat, it is preferable that the fountain is sprayed over a wide range, and therefore it is appropriate that the second connecting member 5 has the opening 53. Alternatively, since the opening 53 is vacant toward the discharge port, the entire water discharge hose can be fountained forward, which is preferable when the liner material 110 is stretched.

  As described above, since the second connecting member 5 has the opening 53, the swivel joint 1 can also play a role of water discharge, and the efficiency of repair work of the buried pipe 100 is improved.

  Moreover, it is also suitable that the mounting apparatus for the buried pipe protective material using the swivel joint 1 described in the first and second embodiments is used.

  That is, the swivel joint 1 described in the first and second embodiments, the first path 2 connected to the first connection member 4, the second path 3 connected to the second connection member 5, and the second path 4. A discharge port that is connected to the tip of the first connection member 4 and the second connection member 5. The discharge port discharges a gas or a liquid that applies pressure to the protective material mounted inside the buried pipe 100. At least one of them is a mounting device for a protective material for a buried pipe that can be rotated according to the torsional pressure of the first path 2 and the second path 3 while being coupled by the coupling member 6. If such a mounting device is used, the buried pipe can be repaired easily and safely.

  The swivel joint described in the first and second embodiments is an example for explaining the gist of the present invention, and includes modifications and modifications without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Swivel joint 2 1st path | route 3 2nd path | route 4 1st connection member 5 2nd connection member 6 Connection member 100 Buried pipe 101 Internal surface 110 Liner material 130 Water discharge hose

Claims (8)

A swivel joint that connects the first path and the second path for applying pressure to the protective material mounted inside the buried pipe,
A first connecting member connected to the first path;
A second connecting member connected to the second path;
A coupling member that couples the first connection member and the second connection member,
Wherein at least one of the first connecting member and the second connecting member, Ri rotatably der in a state bound by the binding member,
The first path is connected to a pressure source, the second path is connected to an outlet;
In a state where the first connection member and the second connection member are coupled by the coupling member, only the second connection member is rotatable,
The second connection member has an opening facing the discharge port,
The opening is a swivel joint , which is a gap along a rotation outer periphery of the second connection member . The coupling member has a bearing which faces the outer periphery of the second connecting member, according to claim 1 swivel joint according. The swivel joint according to claim 1 or 2 , wherein the coupling member has an internal space, and at least one of the first connection member and the second connection member is inserted into and coupled to the internal space. The swivel joint according to claim 3 , wherein the internal space has a packing that contacts at least one of the first connection member and the second connection member. The swivel joint according to any one of claims 1 to 4 , wherein at least one of the first connection member and the second connection member is rotated by pressure due to twisting of the second path. The swivel joint according to any one of claims 1 to 5 , wherein a rotational force of at least one of the first connection member and the second connection member has a predetermined upper limit. Each of the first path and the second path conveys at least one of water, hot water, oil, and air,
The swivel joint according to any one of claims 1 to 6 , wherein the discharge port discharges at least one of water, hot water, oil, and air. The swivel joint according to any one of claims 1 to 7 ,
A first path connected to the first connection member;
A second path connected to the second connection member;
A discharge port connected to the tip of the second path,
The discharge port discharges a gas or liquid that applies pressure to a protective material mounted inside the buried pipe,
The at least one of the first connection member and the second connection member is rotatable in accordance with the torsional pressure of the first path and the second path while being coupled by the coupling member. Mounting device.