JP4365876B2 - Drug injection device in the propulsion shield method - Google Patents

Description

  The present invention relates to a drug injection device in a propulsion shield method, and more particularly to an apparatus for injecting a drug as a lubricant into the outer periphery of a plurality of buried pipes connected to the rear of a shield machine.

  When laying buried pipes in the ground, a propulsion shield method is often employed in which a plurality of buried pipes connected to the shield machine are pushed and laid while excavating the ground with a shield machine.

  In this case, the propulsion work is carried out while injecting a lubricant such as a lubricant for reducing propulsion resistance during propulsion or a chemical such as a soil conditioner for improving surrounding soil into the outer peripheral portion of the buried pipe. In particular, when propelling a long distance, it is necessary to inject a lubricant over the entire length of the buried pipe to reduce the propulsion resistance.

  The injection of the drug in the conventional propulsion operation is performed by providing a drug supply pipe in the embedded pipe and providing an injection port in the tube wall of the embedded pipe and via a drug injection device including a check valve attached to the injection port. When the drug was injected into the outer periphery of the tube and the propulsion operation was completed, the drug injection tube was removed from the buried tube, and the drug injection device was left on the tube wall.

  FIG. 4 shows a state of arrangement of a conventional drug injection device and a drug injection tube, and FIG. 5 is an enlarged schematic view showing the configuration of the drug injection device. That is, as shown in FIG. 4, the buried pipes 1a and 1b are connected to the rear of a shield machine (not shown) to form the propulsion bodies 1, and the drug supply pipes 2 are provided in the respective buried pipes. Is provided with a drug storage tank 3 and a pump 4 for supplying the drug stored in the drug supply pipe 2 to the drug supply pipe 2, and a coupling pipe 6 is connected to a drug injection device 5 provided on a pipe wall of a predetermined buried pipe 1a. Had to be fed through.

  As shown in an enlarged cross-sectional view in FIG. 5, the drug injection device 5 forms a rectangular opening in a part of the tube wall 7 formed by the outer wall portion 7 a made of steel plate and the inner wall portion 7 b made of concrete. It is mounted so as to be embedded in the opening, and is configured as follows.

In other words, the partition wall 52 is provided in the casing body 51 embedded in the opening of the tube wall 7 to form the first space 53 and the second space 54.
Further, the edge of the casing body 51 is welded and fixed to the outer wall portion 7a, and a cover 55 that covers the first and second spaces 53 and 54 is provided on the outer surface side of the casing body.

  A first check valve 8 having a lift-type general-purpose check valve is mounted on the partition wall 52 from the first space 53 side, and its input end penetrates the bottom of the casing body 51 in the first space 53. In this configuration, the medicine supplied through the joint pipe 6 is discharged into the second space 54. The second space 54 is fitted with a second check valve 9 having a butterfly-type valve body that discharges the medicine in the second space 54 to the outer peripheral portion of the embedded tube 1a so as to penetrate the cover 55. ing. Since the configuration of the second check valve 9 is well known, detailed description thereof is omitted.

  On the other hand, the bottom of the casing body 51 is provided with a device for cutting the coupling tube 6 in order to remove the drug supply tube 2 and the coupling tube 6 connected thereto at the end of the propulsion operation. That is, an appropriate cutting blade 10 is disposed between the bottom surface of the casing main body 51 and the cover member 56 so as to be movable in the axial direction of the buried pipe 1a, and the tip of the cutting blade 10 and a mud pipe or waste mud (not shown). When connecting the pipe with an appropriate connecting tool 10a such as a wire and removing the chemical supply pipe 2 and the mud feeding pipe and the mud draining pipe at the end of the propulsion operation, the cutting blade 10 is connected via the connecting tool 10a. Is moved to the right in the figure to cut the coupling tube 6 and at the same time, the cutting port of the coupling tube 6 is closed with a plate member on which the cutting blade 10 is mounted.

  Therefore, the drug injection device 5 embedded in the tube wall remains in the state where it is embedded in the tube wall even after the drug supply tube 2 is removed. (For example, refer to Patent Document 1).

JP 2004-285616 A

  The conventional drug injection device is configured as described above, and the first check valve 8 employs a lift-type general-purpose check valve. However, since this valve has a small substantial opening area as is well known, When dust or the like is included, there is a problem that clogging easily occurs.

  Moreover, although it has set it as the structure which cut | disconnects the coupling pipe | tube 6 connected to the chemical | medical agent injection apparatus 5 with the cutting blade 10 at the time of removal of the chemical | medical agent supply pipe | tube 2, there also existed a problem that a structure was complicated and manufacturing and installation took time.

  The present invention has been made to solve the above-described problems, and employs a check valve having a structure in which a drug is hard to be clogged, and is easy to work at the time of removal of the drug supply pipe, and the subsequent blockage is easy and reliable. It is an object of the present invention to provide a drug injection device that can be performed in the same manner.

  The drug injection device in the shield construction method according to the present invention is configured to excavate and propel a propulsion body having a buried pipe connected to the rear of a shield machine while injecting a drug into the outer peripheral portion of the buried pipe of the propulsion body. In the propulsion shield method for laying the formed pipe line, a ball valve check valve provided in the buried pipe and connected to a medicine supply pipe for supplying the medicine through a coupler is separated from the coupler. The ball is mounted in a buried state on the side wall of the buried pipe so that the weight of the ball acts in the closing direction of the check valve, and the medicine delivered from the ball valve type check valve is discharged to the outer periphery of the buried pipe. A second check valve is provided on the pipe wall portion of the buried pipe.

  In the medicine injection device in the shield method according to the present invention, the ball valve check valve and the second check valve are accommodated in one case. Further, the second check valve has a butterfly type valve element.

  The drug injection device in the shield method according to the present invention is also configured such that the above-described turnip is composed of a plug and a socket that is detachably coupled to the plug, and the drug supply pipe and the mud feed pipe after the propulsion work is completed. When the mud pipe is removed and the socket is removed from the plug, a removal blocking means is provided for closing the input side of the plug.

  The drug injection device in the shield construction method according to the present invention, the removal block means has a casing body to which the coupler is mounted, and a hole for leading the drug supply pipe coupled to the socket of the coupler to the outside, A lid that covers the casing body, a closed portion that is slidable on the lid, and a width narrower than the closed portion, and can be easily cut into the end surface of the closed portion And a movable plate having a narrow portion having a hole corresponding to the hole and fixed to the casing body, and the movable plate is closed when the movable plate is closed by the closed portion of the movable plate. Abutment with the end face of the closing portion is made to stop the sliding of the closing portion, and a projecting portion for cutting and separating the narrow portion of the movable plate from the closing portion.

  In the drug injection device in the shield method according to the present invention, a cut portion for facilitating cutting and separation of the both is provided at the connecting portion between the narrow portion and the closing portion of the movable plate.

The drug injection device in the shield method according to the present invention is configured as described above, and the check valve on the input side of the drug injection device is a ball valve type check valve, and the ball's own weight is the closing direction of the check valve Since it is mounted on the side wall of the buried pipe so as to act on the valve, the valve operation is highly reliable, the valve opening area is large, and even if the medicine contains dust, it is difficult to clog.
In addition, since the ball valve type check valve is provided apart from the coupler, the mounting position on the pipe wall can be selected regardless of the coupler, so that the weight of the ball acts in the closing direction of the check valve. It can be attached to the tube wall in an optimal state.

  In addition, since the drug supply pipe is connected to a coupler composed of a plug and a socket and detachably coupled to each other, the drug is supplied to the drug injection device via this coupler. Since the removal work is simple and the input side of the plug is reliably closed after the removal work, it is possible to reliably prevent the medicine, groundwater, etc. outside the buried pipe from flowing back into the buried pipe after the completion of the propulsion work.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of the first embodiment, and is a cross-sectional view showing a state in which an embedded tube is cut in a radial direction at an embedded portion of the drug injection device, and FIG. It is the schematic which expands and shows, (a) is a top view, (b) is a side view.

  As shown in FIG. 1, the buried pipe 1 is composed of a steel plate outer wall portion 7a and a concrete inner wall portion 7b. A chemical supply pipe 2 is provided at the inner lower part together with a mud pipe 11 and a mud pipe 12 for supplying mud water to the shield machine and discharging the mud produced along with the mud. The drug supply pipe 2 is connected to the coupler 14 of the removal blocking means 13 so that the drug is supplied from the coupler 14 to the drug injection device 5 through the coupling pipe 15. The removal blocking means 13 will be described later.

  The medicine supply device 5 has a ball valve type check valve 16 and a second check valve having a butterfly-type valve body similar to that in FIG. 5 for discharging the medicine discharged from the check valve 16 to the outer peripheral portion of the buried pipe. And a case 17 that accommodates the valve 9, and the check valve 16 is directed vertically so that the weight of a ball (not shown) of the ball valve check valve 16 acts in the closing direction of the check valve. The case 17 is attached to the side wall surface of the buried pipe 1.

  Since the configuration of the ball valve check valve 16 itself is well known, detailed description thereof is omitted. In the case 17, a drug passage 18 is formed between the check valve 16 and the second check valve 9, and an epoxy resin 19 is filled to fix the check valve 16. The input end of the check valve 16 is connected to the coupling pipe 15.

  The removal blocking means 13 is configured as shown in FIGS. 2 (a) and 2 (b), and is provided at a position separated from the drug injection device 5. That is, a casing main body 61 whose longitudinal direction is embedded in the pipe wall along the mud feed pipe 11 and the mud discharge pipe 12 and a hole 62 for introducing the drug supply pipe 2 into the casing main body at the lower part in the buried pipe 1. A lid body 63, a closing portion 64 provided on the lid body 63 so as to be slidable in the longitudinal direction, leftward in FIG. 2, and having the same width as the casing body 61, and a narrower width than the closing portion. And a movable plate 68 composed of a narrow portion 67 having a hole 66 corresponding to the hole 62 and coupled to the end surface 65 of the closing portion 64, and the movable plate fixed to the casing body 61 by a screw 69. 2 slides to the left in FIG. 2, and when the closing portion 64 slides to a position where the hole 62 of the lid 63 is closed, the end face 65 of the closing portion 64 is brought into contact with the end portion 65 of the closing portion 64 and beyond that. A slide having a protrusion 70 that prevents sliding. Tsu and a path 71.

  A blocking portion 78 having a thickness slightly larger than the thickness of the movable plate 68 and having a tapered surface 77 formed on the stopper 71 side is provided on the lower surface of the protruding portion 70 of the stopper 71. Therefore, the contact between the end surface 65 of the closing portion 64 and the protruding portion 70 is actually such that the end surface 65 is sandwiched between the stopper 71 and the tapered surface 77, and the sliding of the closing portion 64 is caused by the protrusion 70. Therefore, the protrusion 70 and the end face 65 do not come into contact with each other.

  Further, a cut portion 72 is provided from both outsides at a joint portion between the narrow portion 67 of the movable plate 68 and the end face 65 of the closing portion 64, and the movable plate 68 slides to the left in FIG. When the end face 65 is sandwiched between the tapered surface 77 and the stopper 71 and sliding is prevented immediately before the projecting portion 70, the narrow portion 67 is easily cut from the closing portion 64.

  Note that one end of an appropriate connection tool such as a wire (not shown) is coupled to the hole 73 provided at the left end of the movable plate 68 in FIG. 2, and the other end of the connection tool is connected to the drug supply tube 2 shown in FIG. It is fixed to the supply / discharge mud pipes 11 and 12. Further, the right end wall 74 in FIG. 2 of the casing main body 61 includes a plug 14a and a socket 14b, and the plug 14a of the coupler 14 capable of detachably coupling the socket to the plug penetrates the end wall 74. The lower end of the coupling tube 15 shown in FIG. 1 is coupled to the plug 14a. Further, the medicine supply pipe 2 is coupled to the socket 14b.

  Since the coupler 14 is commercially available and well known, the description of the specific structure is omitted. However, the operation unit 75 provided on the outer periphery of the socket 14b is moved leftward in FIG. 14a and the socket 14b are disconnected, and the plug 14a and the socket 14b are connected by inserting the operation portion 75 of the socket 14b into the plug 14a. In addition, one end of an appropriate connection tool 76 such as a wire is fixed to the operation unit 75, and the other end of the connection tool 76 is pulled out through the holes 62 and 66 and fixed to the mud feed pipe 11 or the mud discharge pipe 12. Has been.

  Next, the operation of this embodiment will be described. FIG. 2 shows a state in which the plug 14a and the socket 14b of the coupler 14 are connected, and the drug is supplied from the drug supply pipe 2 to the ball valve check valve 16 via the coupler 14 and the coupling pipe 15 shown in FIG. And the medicine discharged from the check valve 16 is supplied to the outer peripheral portion of the buried pipe 1 from the second check valve 9 having a butterfly-type valve body through the passage 18, and the shield machine and the plurality of buried The propulsion body 1 made of a pipe is excavated.

When the propulsion operation is finished, the chemical supply pipe 2, the mud pipe 11 and the mud pipe 12 are removed.
In this case, the mud feeding pipe 11 and the mud discharging pipe 12 are pulled out first, and the operation portion 75 of the socket 14b of the coupler 14 is connected to the operation part 75 in FIG. Since it is pulled to the left, the connection between the plug 14a of the coupler 14 and the socket 14b is released.

  Thereafter, since the medicine supply tube 2 is pulled out, the socket 14b coupled to the tip of the medicine supply tube 2 passes through the hole 62 of the lid 63 of the casing body 61 and the hole 66 of the narrow portion 67 of the movable plate 68. It is pulled out and removed.

  In addition, as for an appropriate connector such as a wire connecting the hole 73 of the movable plate 68 and the drug supply pipe 2 or the supply / discharge mud pipes 11 and 12, the socket 14b of the coupler 14 is connected to the hole 62 of the lid 63 and the movable member. The length is set in advance such that the movable plate 68 starts to be pulled to the left in FIG. 2 when it is pulled out of the main body 61 through the hole 66 of the narrow portion 67 of the plate 68. Alternatively, the other end of an appropriate connector 76 such as a wire fixed to the coupler operating section 75 may be fixed to the mud pipe 11 or the mud pipe 12 through the hole 73. With this configuration, the movable plate 68 is pulled to the left in FIG. 2 after the coupler 14 is pulled out from the main body 61. As a result, the narrow portion 67 and the closing portion 64 of the movable plate 68 are moved to the left in FIG. It slides and stops immediately before the projecting portion 70 in such a manner that the end surface 65 of the closing portion is sandwiched between the stopper 71 and the tapered surface 77. When the movable plate 68 is further pulled leftward in FIG. 2, the narrow portion 67 is cut at the position of the notch portion 72, and the narrow portion 67 is removed together with the drug supply pipe 2 or the supply / discharge mud pipes 11 and 12. .

  At this time, since the end face 65 of the closing portion 64 is press-fitted between the stopper 71 and the tapered surface 77, the closing portion 64 does not return to the right in FIG. It remains in the casing body 61 with the state stopped just before, and the hole 62 of the lid 63 is closed. Therefore, even if chemicals, groundwater, or the like flows backward from the outside of the buried pipe 1 through the check valves 9 and 16 to the coupler 14 side after removal, the inflow into the buried pipe 1 can be reliably prevented. .

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described with reference to the drawings. The basic configuration of this embodiment is the same as that of the first embodiment, but the configuration of the coupler mounted on the removal blocking means and its mounting structure are different.

FIG. 3 is a side view showing the configuration of the removal blocking means 13 in the second embodiment. The same or corresponding parts as those in FIG. 1 and FIG.
Only differences from the first embodiment will be described below.

  As shown in FIG. 3, the coupler 14 according to the second embodiment includes a plug 14a, a socket 14b, and an operation unit 75 that is movably provided on the outer periphery of the socket, as in the first embodiment. The plug 14a and the socket 14b are connected by inserting the plug 14a into the socket 14b with the operation unit 75 moved to the socket 14b side. In this state, the operation unit 75 returns to the plug 14a side to connect the plug 14a. The connection state with the socket 14b is locked.

  Further, when the operating portion 75 is moved to the socket 14b side, that is, relatively to the right in FIG. 3 in the connected state of the plug 14a and the socket 14b, the lock is released and the connection between the socket 14b and the plug 14a is released. It is configured as follows. The moving direction of the operation unit 75 at the time of unlocking is opposite to that of the first embodiment.

  The coupler 14 thus configured is mounted on the removal blocking means 13 with the following configuration. That is, the guide plate 80 is mounted so as to form an inclined surface from the end portion side of the narrow portion 67 of the movable plate 68 toward the end plate 74 side, and the fixed plate is interposed between the guide plate 80 and the lid 63. 81 is fixed. A hole 82 having a diameter smaller than that of the operation portion 75 of the coupler 14 is provided in the center portion of the fixing plate 81.

  On the other hand, a flange-like projecting portion 83 is formed in the operation portion 75 of the coupler 14 so that the plug 14a of the coupler 14 penetrates the hole 82 of the fixing plate 81 from right to left in FIG. The operation portion 75 is brought into contact with the right surface of the fixing plate 81 in FIG. 3, and the fixing plate 81 and the protruding portion 83 are fixed with appropriate screws 84.

  The drug supply pipe 2 is coupled to the plug 14a, a flexible pipe 85 such as a vinyl pipe is coupled to the socket 14b, and the outer end of the flexible pipe 85 is connected to the coupling pipe 15 shown in FIG. The coupler 14 shown in FIG. 3 is commercially available, and the configuration itself is well known.

Next, the operation of the second embodiment will be described.
FIG. 3 shows a state in which the plug 14a and the socket 14b of the coupler 14 are connected. As in the first embodiment, the coupler 14, the flexible pipe 85, and the coupling pipe 15 shown in FIG. The medicine is supplied to the ball valve type check valve 16 through the second check valve 9 having a butterfly-type valve body through the passage 18 and the medicine discharged from the check valve 16 is an outer peripheral portion of the buried pipe 1. The propulsion body 1 composed of a shield machine and a plurality of buried pipes is excavated and propelled.

  When the excavation work is completed, the chemical supply pipe 2, the mud pipe 11, and the mud pipe 12 are removed. In this case, since the plug 14a coupled to the tip of the medicine supply pipe 2 is pulled leftward in FIG. 3 as the medicine supply pipe 2 is removed, the socket 14b connected to the plug 14a is also left in FIG. It is pulled toward. As a result, the operation portion 75 fixed to the fixing plate 81 moves relatively to the socket 14b side, that is, rightward in FIG. 3, so that the connection between the socket 14b and the plug 14a is released, and the plug 14a is The drug supply tube 2 is removed in the form of being pulled out together with the drug supply tube 2. In this embodiment, since the plug 14a is pulled out by the medicine supply pipe 2 and the coupling state of the coupler 14 is released, as shown in FIG. Etc., the connecting tool 76 for connecting the device and the like becomes unnecessary.

  Further, since the movable plate 68 is pulled leftward in FIG. 3 as in the first embodiment, the hole 62 of the lid 63 is closed as in the first embodiment. The guide plate 80 prevents the plug 14a and the medicine supply pipe 2 from contacting or locking with surrounding members when the medicine supply pipe 2 fitted with the plug 14a is pulled out, and makes the drawer smooth. It serves as a guide for this.

  Further, the flexible pipe 85 coupled to the socket 14b is provided to perform the movement smoothly because the socket 14b moves to the left in FIG. 3 when the medicine supply pipe 2 is pulled out.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a configuration of a first embodiment of the present invention, and is a cross-sectional view showing a state where an embedded tube is cut in a radial direction at an embedded portion of a drug injection device. It is the schematic which expands and shows the structure of the removal obstruction | occlusion means in Embodiment 1, (a) is a top view, (b) is a side view. It is a side view which expands and shows the structure of the removal obstruction | occlusion means in Embodiment 2 of this invention. It is the schematic which shows the structure of the chemical | medical agent supply pipe | tube and the chemical | medical agent injection apparatus in the conventional propulsion shield method. It is an expanded sectional view which shows the structure of the chemical injection device in FIG.

Explanation of symbols

1 propellant, 1a, 1b buried pipe, 2 drug supply pipe, 3 drug reservoir,
4 pump, 5 drug injection device, 6 coupling pipe, 7 pipe wall, 7a outer wall,
7b inner wall, 8 first check valve, 9 second check valve, 10 cutting blade,
10a connection body, 11 mud pipe, 12 drainage pipe, 13 removal blocking means,
14 coupler, 14a plug, 14b socket, 15 coupling pipe,
16 ball valve type check valve, 17 case, 18 passage, 19 epoxy resin, 51 casing body, 52 partition wall, 53 first space, 54 second space,
55 cover, 56 cover member, 61 casing body, 62 hole,
63 lid, 64 closing part, 65 end face, 66 hole, 67 narrow part,
68 movable plate, 69 screw, 70 protrusion, 71 stopper,
72 notches, 73 holes, 74 end walls, 75 operation parts, 76 connectors, 77 taper surfaces, 78 blocking parts, 80 guide plates, 81 fixing plates, 82 holes,
83 protrusions, 84 screws, 85 flexible pipes.

Claims (6)

  In a propulsion shield construction method in which a propulsion unit coupled with a buried pipe behind a shield machine is excavated and propelled while injecting a chemical into the outer peripheral portion of the buried pipe of the propulsion unit, and a pipeline formed by the buried pipe is laid. The ball's own weight acts in the closing direction of the check valve at a position separated from the coupler by a ball valve type check valve provided in the buried pipe and connected to the drug supply pipe for supplying the drug via a coupler. A second check valve that is mounted in a buried state on the side wall of the buried pipe and that discharges the medicine delivered from the ball valve check valve to the outer peripheral portion of the buried pipe is provided in the pipe of the buried pipe. A drug injection device in a propulsion shield method characterized by being provided on a wall.   The drug injection device in the propulsion shield method according to claim 1, wherein the ball valve type check valve and the second check valve are accommodated in one case.   The drug injection device in the propulsion shield method according to claim 1 or 2, wherein the second check valve has a butterfly-type valve body.   The coupler is composed of a plug and a socket detachably coupled to the plug, and after the propulsion work is finished, the chemical supply pipe, the mud pipe, and the mud pipe are removed, and the socket is removed from the plug. The drug injection device in the propulsion shield method according to any one of claims 1 to 3, further comprising a removal blocking means for closing the input side of the plug when pulled off.   The removal blocking means includes a casing body to which the coupler is mounted, a hole for leading a drug supply pipe coupled to a socket of the coupler to the outside, a lid body that covers the casing body, And a narrow portion formed so as to be narrower than the closed portion and coupled to the end face of the closed portion so as to be easily cut. The movable plate is fixed to the casing body, and when the movable plate is slid, the closed portion of the movable plate is in contact with the end surface of the closed portion while the hole is closed. 5. The drug injection device in the propulsion shield method according to claim 4, further comprising: a protrusion that cuts and separates the narrow portion of the movable plate from the closed portion.   6. The drug injection device in the propulsion shield method according to claim 5, wherein a cut portion for facilitating the cutting and separation of the both is provided in a joint portion between the narrow portion and the closing portion of the movable plate.

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