JP5547047B2 - Existing pipe recovery method and equipment - Google Patents

Description

  The present invention relates to a recovery method and apparatus for recovering existing pipes such as sewage pipes without crushing them by a non-cutting rotary propulsion system.

  Generally, the sewer mains are buried underground along the road. Sewer pipes that have been installed for many years are often deformed and cracked due to secular changes and earthquakes. Further, since the load of the vehicle traveling on the road is constantly received, the pipe may be lowered or damaged. For this reason, sewer pipes that have exceeded the service life need to be replaced with new sewer pipes.

  Conventionally, as a method for renewing an old sewer pipe, an excavation method was adopted in which a road was excavated from the ground to excavate an old sewer pipe, and then a new sewer pipe was installed and refilled. This type of open-cut method makes it difficult to work on roads with heavy traffic.In recent years, methods for renewing sewage pipes using the non-open-cut method have been developed. There is a cutting method.

  Among these, the expansion crushing method includes a method disclosed in Patent Document 1, for example. In this expanded crushing method, the tip of the crusher is placed in an existing pipe, the existing pipe is forcibly expanded to crush, and the renewed pipe is press-fitted into the expanded existing pipe. It is.

  On the other hand, for example, there is a construction method disclosed in Patent Document 2 as a construction method using a rotary cutting method. This rotary cutting method is a method of promoting a new renewal pipe while cutting an existing pipe with a cutter of an excavator.

JP 2007-146963 A JP 2001-323778 A

  In such a conventional existing pipe renewal work, there is a problem that fragments of the existing pipe remain in the ground without being treated as industrial waste. In particular, the existing crushing method leaves all existing pipes in the ground.

  On the other hand, in the rotary cutting method, the shredded pieces are discharged to the ground, so there are few problems with industrial waste, but there are many steel collar parts in the part connecting existing pipes, and this steel collar part It was difficult to cut, and breakage of the cutter and clogging of the cut pieces occurred, which sometimes made it impossible to propel the cut.

  Therefore, the object of the present invention is to solve the problems of the prior art and to recover all the existing aged pipes, and in addition, breakage of the cutter and clogging of the cut pieces occur. An object of the present invention is to provide an existing pipe recovery method and apparatus capable of efficiently proceeding with the recovery work without any problems.

In order to achieve the above object, the recovery method according to the present invention is a recovery method for recovering an existing pipe of a sewer buried in the ground by a non-opening method, and has a larger inner diameter than the existing pipe. A casing in which a leading conduit portion is connected to the tip of a casing having a casing, and the casing is propelled by one unit so as to cover only one of the existing pipes while rotating only the leading conduit portion by a propulsion device installed in a start shaft and promotion step, the collection trolley traveling propulsion and said casing is placed in the casing, the start-side winch installed in the starting pit, the existing pipe in front on the inside of Kisaki conduit portion to said collection truck in a state where the grip is, the rotating together with the forcibly harvested carriage from the originating shafts side by the start-side winch, to separate the unit length existing pipe in lead pipe section from the remainder of the existing pipe Collecting the existing pipe while propelling the casing until it reaches the reaching shaft while repeating the casing propulsion process and the existing pipe collecting process alternately. It is a feature.

Further, the present invention is a recovery device for carrying out a construction for recovering existing pipes of sewers buried in the ground by a non-open cutting method, while adding unit pipes having an inner diameter larger than the existing pipes A casing to be propelled, a tip pipe portion rotatably connected to the tip of the casing, having a cutter for excavating earth and sand, and an inner winding blade for discharging earth and sand, and a rotation transmission for transmitting rotational torque to the tip duct section A rod shaft rotatably mounted in the casing, a rotating device that rotationally drives the rod shaft, a propulsion device that has a propulsion cylinder that generates thrust to propel the case sink, and the casing traveling, and recovery trolley for conveying the existing pipe to the starting pit side while holding the existing pipe, installed in the starting pit, said turn the existing pipe which is inside the destination conduit portion In a state of being gripped carriage and is characterized with the start-side winch for forcibly the recovery carriage from the starting pit side, and reaches the side winch installed in arrival pit, in that it consists of.

It is sectional drawing which shows the collection | recovery apparatus of the existing pipe | tube by one Embodiment of this invention. It is a side view which shows the state which the piston rod of the rotation transmission part with which the collection | recovery apparatus of the said existing pipe is equipped extended. It is a side view which shows the state which the piston rod of the rotation transmission part with which the collection | recovery apparatus of the said existing pipe is equipped retracted. It is a top view which shows the guide which guides the piston rod of a rotation transmission part. It is a top view which shows the collection trolley | bogie used for collect | recovering existing pipes. It is a side view of the collection cart. Explanatory drawing which shows operation | movement of the collection trolley | bogie. It is sectional drawing which shows the operation | work which collect | recovers an existing pipe | tube with a collection trolley | bogie. It is explanatory drawing of the state which updated the existing pipe newly.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of an existing pipe recovery method and apparatus according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing a configuration of an apparatus for performing an existing pipe collecting method according to the present embodiment. In FIG. 1, reference numeral 10 indicates a sewer pipe which is an existing pipe buried in the ground. Since this existing pipe 10 has exceeded the service life, it will be collected. Reference numeral 12 is a starting shaft, and reference numeral 13 is a reaching shaft. Here, an existing manhole is used for the reach shaft 13. Reference numeral 14 indicates a propulsion device installed in the starter 12. The propulsion device 14 is a propulsion device to which various means for collecting all existing pipes 10 without crushing are added on the basis of a conventional propulsion device used in a propulsion method such as a sewage pipe.

  In this embodiment, the propulsion device 14 is composed of various parts such as a base 15, a rotation device 16, a casing mounting plate 17, a propulsion cylinder 19, and a back plate 28. The end of the casing 18 to be propelled is fixed to the casing mounting plate 17. The propulsion cylinders 19 that generate thrust are respectively fixed to the left and right sides of the casing mounting plate 17. The piston rod 19 a of the propulsion cylinder 19 is connected to the back plate 28, and receives the reaction force when the casing 18 is pushed out by the back plate 28.

  The rotating device 16 is connected to the rod 21 as a unit of the rod shaft 20 while being connected one by one. At the head of the rod shaft 20, support arms 22 and 23 that support the rod shaft 20 rotatably extend vertically, and support arms 22 a and 23 a that support the rod shaft 20 are supported by these support arms 22 and 23. ing.

  The casing 18 is added each time one unit casing having a length of, for example, about 1 meter is propelled. The casing 18 has an inner diameter larger than the outer diameter of the existing pipe 10. A tip rotating portion 24 as a leading conduit is rotatably connected to the tip of the casing 18 in order to discharge the soil while excavating the sand outside the existing pipe 10. A plurality of cutter chips 25 are attached to the tip of the tip rotating portion 24 in the circumferential direction. Further, the inner winding blade 27 extends in a spiral shape on the inner peripheral surface of the tip rotating portion 24. The inner winding blade 27 replaces a screw for discharging the earth and sand backward. The length of the tip rotating portion 24 as such a leading conduit corresponds to the length of one existing pipe 10, and when one casing 18 is propelled, one tip rotating portion 24 has one. The existing pipe 10 of the minute enters.

  The rotation transmitting unit 30 transmits the rotation of the rod shaft 20 to the tip rotating unit 24. In this embodiment, a pair of cylinders 31a and 31b are incorporated into the main body of the rotation transmission unit 30 symmetrically by 180 degrees, and the piston rods 32a and 32b extend and contract in opposite directions, respectively. . The expansion and contraction of the piston rods 32a and 32b allows the distal end rotating portion 24 and the rotation transmitting portion 30 to be connected and detached.

Here, FIG. 2 shows a state where the piston rods 32a, 32b of the rotation transmission unit 30 are extended, and FIG. 3 shows a state where the piston rods 32a, 32b of the rotation transmission unit 30 are retracted.
A short cylindrical joint member 34 is fixed to the distal end of the tip rotating portion 24. Holes 35a and 35b into which the tips of the piston rods 32a and 32b are detachably fitted are 180 °. It is formed in a symmetrical position. A jet nozzle 36 for injecting high-pressure water toward the earth and sand is attached near the tip of the piston rod 32a.

  As shown in FIG. 4, in the joint member 34, guides 37a and 37b for guiding the tip ends of the piston rods 32a and 32b so as to fit into the holes 35a and 35b are formed in the circumferential direction.

  As shown in FIG. 1, a water pump unit 38 that pumps water and a hydraulic pump unit 40 that supplies pressure oil to the rotation transmission unit 30 are installed on the ground. In this case, the tubes extending from the water pump unit 38 and the hydraulic pump unit 40 are connected to a swivel 42 provided in the rotating device 16. The swivel 42 is a double swivel, one of which is a swivel for sending pressure water to the jet nozzle 36, and the other swivel is a hydraulic pressure that supplies pressure oil that operates the rotation transmission unit 30. For line use.

  Next, in FIG. 1, reference numeral 50 indicates a recovery cart that moves the casing in order to recover the existing pipe 10. Here, FIG. 5 is a plan view of the recovery cart 50, FIG. 6 is a diagram showing a side surface of the recovery cart 50, and FIG. 7 is a diagram showing an operation of the recovery cart 50.

  The collection carriage 50 includes a carriage 51 for moving and a pair of presser arms 52 that can grasp the existing pipe 10 to be collected. The carriage 51 is provided with wheels 53 on the front, rear, left and right. A pair of arm support portions 54 rise from both sides of the carriage 51. The presser arm 52 is swingably supported by the arm support portion 54 via a shaft 55. A lever member 57 extends downward from the boss member 56 to which the presser arm 52 is fixed, at an angle of 90 ° with the presser arm 52, for example. A wire 58 is connected to the tip of the lever member 57 via a socket for moving the carriage 51 and opening and closing the presser arm 52. As shown in FIG. 1, one end of the wire 58 is wound around a start side winch 59 installed on the start stand 12, and the other end of the wire 58 is reached on the arrival side winch 60 installed on the reach shaft 13. It is wrapped around From the front part of the carriage 51, a pipe support part 62 that grips the existing pipe 10 in cooperation with the presser arm 52 projects forward. Teeth 63 and 64 that bite the existing pipe 10 are formed at the distal end of the presser arm 52 and the pipe support portion 62, respectively.

  In FIG. 1, when the wire 58 is wound up by the arrival side winch 60 while the wire 58 is fed out from the start side winch 59, the collection carriage 50 can move forward with the presser arm 52 open. On the contrary, when the wire 58 is wound up by the start side winch 59, the presser arm 52 rotates as shown in FIG. 7, and the end of the existing pipe 10 can be held together with the pipe support portion 62. Further, by winding the wire 58 further with the start side winch 59, the recovery carriage 50 can be carried out to the start counter 12 while the existing pipe 10 is held, and the existing pipe 10 can be recovered.

  The existing pipe collecting apparatus according to the present embodiment is configured as described above. Next, an existing pipe collecting method implemented using the existing pipe collecting apparatus will be described in order of steps. .

In FIG. 1, the propulsion device 14 installed in the start shaft 12 propels the casing 18 so as to cover the existing pipe 10 while excavating the outside of the existing pipe 10 with the tip rotating portion 24 as follows. .
In the rotation transmission unit 30 that transmits the rotation of the rod shaft 20 to the tip rotation unit 24, the piston rods 32 a and 32 b are in an extended state, and the rotation of the rod shaft 20 is transmitted to the tip rotation unit 24 via the rotation transmission unit 30. Communicated. The tip rotating unit 24 is propelled while being rotated, and at this time, high-pressure water is ejected from the jet nozzle 36 toward the earth and sand taken in between the existing pipe 10 and the tip rotating unit 24. Therefore, since the hard and hard earth and sand are also pulverized by the water jet flow and easily flow, the soil is easily discharged by the inner winding spring 27, and the excavation efficiency can be improved without causing clogging.

  Further, unlike the conventional cutting method, the existing pipe 10 itself is not cut, but only the outside of the existing pipe 10 is removed, so that the cutter 25 of the tip rotating portion 24 is a joint that connects the existing pipe 11. Drilling can proceed smoothly without being damaged by a steel collar. Moreover, the casing 18 is rotated without rotating the tip rotating portion 24 in front of the casing 18, so that even if the driving torque of the rotating device 16 is small, the device can be reduced in size and labor can be saved. it can.

  When one casing 18 is propelled in this way, the rotation of the tip rotating portion 24 is temporarily stopped, and the propulsion is interrupted in order to recover the existing pipe 10. At this time, the existing pipe 10 to be collected is in the tip rotating portion 24.

  When the rotation device 16 stops at the propulsion unit 14, the piston rods 32a and 32b are retracted in the rotation transmission unit 30 as shown in FIG. 3, and the connection between the rotation transmission unit 30 and the tip rotation unit 24 is released. Then, by retreating the piston rods 32 a and 32 b, a space through which the existing pipe 10 can pass is formed between the inner surface of the casing 18.

Therefore, the collection carriage 50 is put into the casing 16 from the starter 12 and the collection carriage 50 is advanced toward the existing pipe 10 while winding the wire 58 with the arrival side winch 60 while feeding the wire 58 from the start side winch 59. . In FIG. 7, when the collection carriage 50 advances to a position before the rotation transmission unit 30 and advances to a position where the end of the existing pipe 10 can be gripped, the start side winch 59 and the arrival side winch 60 are stopped once. On the contrary, when the wire 58 is pulled by the start side winch 59, the wire 58 is connected to the lever member 57 integral with the presser arm 54 of the collection carriage 50, so that the presser arm 54 is rotated and the tube support portion is rotated. 62, the existing pipe 10 is gripped. Furthermore, when the wire 58 is pulled by the start side winch 60 and the existing pipe 10 is forcibly pulled, the existing pipe 10 for one piece comes out from the joint portion. At this time, the reaching-side winch 60 can be pulled out safely while preventing the jumping to the reaching shaft 13 by the reaction when the existing pipe 10 is pulled out by applying tension in the direction in which the wire 58 is pulled. After that, as shown in FIG. 8, the wire 58 is wound up by the start side winch 59 while the wire 58 is drawn out by the arrival side winch 60, so that the existing pipe 10 for one piece is held by the collection carriage 50. It can be recovered in the start shaft 12. At this time, since the piston rods 32a and 32b are retracted in the rotation transmission unit 30, the rotation transmission unit 30 does not become an obstacle to carry the existing pipe 10 out.
In the same manner, every time one casing 18 is propelled, the recovery of one existing pipe 10 is repeated, so that the casing 18 is finally propelled to the reaching shaft 13 and all the existing pipes are simultaneously installed. The tube 10 can be recovered. Thus, since all the existing pipe | tubes 10 are collect | recovered, the environmental problem by being left in the ground as industrial waste can be avoided.

  When the collection of the existing pipe 10 is completed, the distal end rotating unit 24 is disassembled and collected by the reaching shaft 13. As for the rod shaft 20, the rod 21 as a unit is moved backward by the propulsion unit 14 and removed one by one at the start shaft 12, and then the propulsion unit 14 is carried out from the start shaft 12.

  When the recovery of the existing pipe 10 is thus completed, a new sewage pipe 70 is next inserted into the casing 18 in FIG. The sewage pipe 70 is preferably a sewage pipe made of vinyl chloride. At this time, arc-shaped spacers 72 are attached in advance to the outer peripheral portion of the sewer pipe 70 at an appropriate interval. The sewage pipes 70 are added one by one in the casing 18, and the pipe line is extended from the manhole 74 to the manhole used as the reaching shaft 13. Such an extension operation of the sewage pipe 70 is merely to put the sewage pipe 70 into the casing 18, and since the sewage pipe 70 is a polyvinyl chloride pipe that is light and easy to handle, it can be easily and efficiently advanced. Further, since the spacer 72 is attached, the sewage pipe 70 can be extended coaxially with the casing 18.

  Next, a filler is injected into the space between the casing 18 and the sewage pipe 70. The filler is injected by feeding the filler through a pipe from a pump unit installed on the ground surface. Thereafter, the start shaft 12 is backfilled and the renovation work is completed.

  DESCRIPTION OF SYMBOLS 10 ... Existing pipe, 12 ... Starting shaft, 13 ... Reaching shaft, 14 ... Propulsion device, 16 ... Rotating device, 18 ... Casing, 19 ... Propulsion cylinder, 20 ... Rod shaft, 24 ... Tip rotation part, 27 ... Inner winding blade , 30 ... Rotation transmission part, 32a, 32b ... Piston rod, 36 ... Jet nozzle, 50 ... Recovery cart, 58 ... Wire, 59 ... Start side winch, 60 ... Arrival side winch, 70 ... Sewage pipe

Claims (6)

A recovery method for recovering existing pipes of sewers buried in the ground by the non-open cutting method,
The leading conduit is connected to the tip of a casing having an inner diameter larger than that of the existing pipe, and the propulsion unit installed in the start shaft is configured to cover only one of the existing pipes while rotating only the leading conduit. A casing propulsion process for propelling one casing;
State recovery trolley traveling propulsion with said casing while placed in the casing, wherein the start-side winch installed in starting pit and the existing pipe in front on the inside of Kisaki conduit portion is gripped by the collecting carriage Then, the recovery carriage is forcibly pulled from the transmission shaft side by the start side winch to separate the existing pipe of the unit length in the front conduit portion from the remaining existing pipes and to be carried out to the start shaft by the recovery truck A recovery process,
An existing pipe collecting method for collecting all existing pipes while propelling the casing until the reaching shaft is reached while alternately repeating the casing propelling step and the existing pipe collecting step.   In the casing propulsion step, the tip conduit portion having a cutter at the tip is rotatably attached to the top of the casing, and the casing is propelled by transmitting rotation from the propulsion device to the tip conduit portion via a rod shaft. The recovery method for an existing pipe according to claim 1, wherein:   2. The existing pipe recovery method according to claim 1, wherein in the casing propulsion step, the sediment is discharged while jetting a high-pressure jet water stream onto the sediment. A recovery device for carrying out the construction of recovering existing pipes of sewers buried in the ground by the non-open cutting method,
A casing that is propelled while adding a unit pipe having an inner diameter larger than that of the existing pipe;
A tip conduit portion that is rotatably connected to the tip of the casing and has a cutter for excavating earth and sand and an inner winding blade for discharging earth and sand;
A rod shaft mounted with a rotation transmission portion for transmitting rotational torque to the leading conduit portion, and rotatably supported in the casing;
A rotating device that rotationally drives the rod shaft, and a propulsion device that includes a propulsion cylinder that generates thrust to propel the case sink;
A collection carriage that travels in the casing and conveys the existing pipe to the start shaft while holding the existing pipe,
The start side winch forcibly pulling the recovery cart from the start shaft side in a state where the recovery cart is gripped by the recovery cart installed on the inner side of the leading conduit portion ,
An arrival side winch installed in the arrival shaft,
An existing pipe collecting device comprising:   The rotation transmission unit includes a cylinder having a plurality of piston rods detachably connected to the tip part, and a jet nozzle that ejects a high-pressure jet water stream toward the earth and sand is attached to the tip part of the piston rod. The existing pipe collecting device according to claim 4, wherein:   The collection carriage includes a carriage that travels in the casing, a pipe support portion fixed to the carriage, and a presser that is rotatably supported by the carriage and grips an existing pipe at the tip in cooperation with the support portion. The existing pipe collecting device according to claim 4, further comprising: an arm, wherein a wire wound around both the start side winch and the arrival side winch is connected to a lever integrated with the presser arm.

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