JP3442365B2 - Tunnel excavator cutter cleaning equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter cleaning device for a tunnel excavator, and more particularly to a cutter cleaning device for a cutter device in which a chamber side of a cutter holder that holds the cutter is closed.

[0002]

2. Description of the Related Art Conventionally, in tunnel construction using a tunnel excavator for full-section excavation, a mud pressure type tunnel excavator and a mud pressure type tunnel excavator have been adopted as a self-maintaining face and countermeasures against face discharge. The ground excavating cutters equipped in these tunnel excavators may be worn during excavation before tunnel penetration when the ground is hard or long-distance excavation. It will be necessary to replace the cutter to recover the reduced drilling efficiency.

However, in carrying out this replacement work, it is necessary to discharge the muddy water or mud filled in the face, but if these are discharged, it becomes impossible to maintain the face independently. Therefore, for the purpose of retaining the cutting face, the ground improvement agent is injected into the ground in front, and further the ground in front is subjected to freezing treatment to improve the ground so that soil and water do not flow into the chamber. After that, a manhole or the like for the partition that separates the chamber from the inside of the excavator main body is opened, and the operator replaces the cutter at the place where the operator wears due to entering the chamber. However, if such work is performed, it requires a great deal of cost to replace the cutter, and also requires a considerable amount of time until the ground is improved and the time required to replace the cutter, which delays the construction period. Will occur.

Therefore, the present applicant has filed Japanese Patent Application Laid-Open No. 2000-969.
The application for the cutter device of the shield machine described in Japanese Patent No. 86 was filed first. This cutter device is designed so that the cutter can be replaced even under the condition that mud pressure or mud pressure is applied.The cutter frame is formed in the chamber where the cutter is installed, and the cutter is equipped with the cutter inside the cutter frame. A holder is provided. And
This cutter holder is provided with a water shut-off gate that shuts off water on the face side when the cutter is replaced. In the case of this cutter device, the inside of the cutter frame is separated from the inside of the chamber so that mud pressure and mud pressure do not act, so the cutter installed in the cutter holder can be used without discharging these mud and mud. It can be replaced from the tunnel excavator body side.

[0005]

However, in the case of the holder capable of exchanging the cutter under muddy water or mud pressure as described above, since the structure has a structure in which the opposite side of the cutter is closed, the cutter holder and the roller cutter are In some cases, the sand and sand that have entered the gaps of the space formed between the rollers are compacted in the holder, which hinders the smooth rotation of the roller cutter, resulting in uneven wear of the cutter. In this case, it is necessary to replace the cutter at an early stage, resulting in an increase in the cost for replacing the cutter and a delay in the construction period.

[0006] The present invention provides a cleaning device for preventing the rotation failure of the roller cutter due to the soil compaction during the excavation even in the cutter device having the structure in which the opposite side of the cutter holder is closed. The purpose is to prevent cutter trouble.

[0007]

In order to solve the above problems, the present invention provides a cutter holder holding a cutter on the chamber side of a cutter head, and the cutter holder is provided with the cutter holder and the cutter. Of the cleaning water is provided between the excavator body and the cutter head.
A water supply mechanism is provided, and the excavator body is fixed to the cleaning water supply mechanism.
A ring and a rotating ring on the cutter head side are provided to
A cleaning water supply line is installed on the fixed ring,
Supply cleaning water in the circumferential direction from the cleaning water supply line
A plurality of cleaning water discharge lines are provided . As a result, since the earth and sand entering the gap between the cutter holder and the cutter can be discharged and washed, the earth and sand can be prevented from being compacted and stable excavation can be performed. In addition, since it is possible to prevent defective rotation and uneven wear of the cutter due to compaction of soil and sand, it is possible to prevent early replacement of the cutter and delay of the construction period. Moreover, from the excavator body
Surely supply cutter cleaning water to the rotating cutter head
It can be supplied and the sediment can be discharged stably.

The cleaning water injection hole is arranged toward the cutting edge of the cutter, and the cleaning water is injected from the cleaning water injection hole toward the cutting face to discharge the earth and sand in the gap toward the cutting face. By doing so, it is possible to discharge the earth and sand in the gap between the cutter holder and the cutter to the face of the face, and prevent defective rotation and uneven wear of the cutter due to compaction of the earth and sand.

[0009]

Further, if a cleaning water discharge line of the rotating ring is connected to the cleaning water supply line of the stationary ring in the circumferential direction of the stationary ring in the circumferential direction of the rotating ring to form a water supply continuation section having a predetermined width, the water supply continuation section can be formed. It is possible to supply the cleaning water from the cleaning water supply line to the cleaning water discharge line while the rotating ring rotates by a predetermined width.

Further, if the water supply continuation portion is formed with a predetermined width such that one cleaning water discharge line communicates with the water supply continuation portion at the same time, the cleaning water supply line and the cleaning water discharge line always have a one-to-one relationship. Therefore, all the cutters can be cleaned with the same pressure.

Further, if a plurality of cleaning water supply lines are provided on the fixed ring and a plurality of cleaning water supply lines for supplying cleaning water from the plurality of cleaning water supply lines are provided in the circumferential direction of the rotary ring, a large number of cleaning water supply lines can be provided. Even if such a cutter exists, the cleaning water discharge line for cleaning each cutter can be connected to the cleaning water supply line on a one-to-one basis to discharge the earth and sand.

In addition, if the cleaning water discharged from a plurality of cleaning water discharge lines is combined to clean the same cutter, it is possible to increase the cleaning time of the cutter which is likely to consolidate the soil. .

If the predetermined widths of the plurality of water supply continuation portions are formed with different predetermined widths and the cleaning water supply time is made different, the cleaning water is supplied at a plurality of different cleaning times depending on the position of the cutter and the like. it can.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 is a vertical cross-sectional view of a tunnel excavator equipped with a cutter cleaning device according to an embodiment of the present invention, FIG. 2 is a front view of the tunnel excavator, and FIG. 3 is an enlarged view of the cutter cleaning device shown in FIG. FIG. In addition, in the following embodiments, a roller cutter provided in a mud pressure tunnel excavator will be described as an example.

As shown in FIG. 1, a cutter frame 3 having a space separated from the space inside the chamber 2 is formed on the chamber 2 side of the cutter head 1. In the cutter frame 3, a cutter holder 5 holding a roller cutter 4 detachably provided is provided. The inside of the cutter frame 3 is a space having the same pressure as the inside of the excavator body 6, and is configured to be able to go in and out through the manhole 8 provided on the excavator body 6 side of the central connecting portion 7 of the cutter head 1. .

The cutter head 1 is composed of an excavator body 6
Slewing bearing 1 driven by a drive motor 9 provided in
It is rotationally driven by the connecting member 12 of the revolving frame 11 which is rotated by 0 (member of the bearing structure including the internal gear). Reference numeral 13 is a screw conveyor for carrying out the earth and sand from the chamber 2.

On the other hand, a rotary joint 14 as a cleaning water supply mechanism for supplying cleaning water to the cutter holder 5 is provided around the center connecting portion 7 of the cutter head 1. This rotary joint 14 supplies cleaning water from the excavator body 6 that does not rotate to the rotating cutter head 1, and is provided on the cutter head 1 side from a cleaning water supply line 15 that is provided on the excavator body 6 side. The cleaning water is supplied to the cleaning water discharge line 16. The cleaning water discharge line 16 is connected to all cutter holders 5 that are clogged with soil.

As shown in FIG. 2, the cutter head 1 is provided with the cutters 4 at predetermined positions, and the cutters 4 are provided on the cutter holder 5. In addition, 23 is a space, and is a space in which the inside of the chamber 2 and the face 18 (FIG. 3) communicate with each other.

As shown in FIG. 3, the cutter holder 5 is a fixed holder 51 provided on the cutter head 1.
And a movable holder 52 that is removable on the cutter frame 3 side. The roller cutter 4 is attached to the movable holder 52 by the fixing member 17. This movable holder 52 has a cutter 4 on the face side 18.
In the state where is provided, it is fixed to the fixed holder 51 with a bolt 53. A seal member 54 seals between the fixed holder 51 and the movable holder 52. The cutter 4 provided on the movable holder 52 is
It is configured so that it can be replaced from the inside of the cutter frame 3, and the cutter 4 is configured to be removable together with the movable holder 52 in a state in which mud pressure or mud pressure is applied to the face.

The cleaning water injection hole 5 for injecting cleaning water toward the movable holder 52, which is one of the cutter holders 5, toward the gap 19 between the cutter 4 and the movable holder 52.
5 are provided. The cleaning water injection hole 55 is provided at the blade tip portion 4 of the roller cutter 4 provided on the movable holder 52.
It is arranged at two places so that the cleaning water 20 is jetted toward the nozzle 1. A water injection port 56 is provided on the side of the cutter frame 3 of the cleaning water injection hole 55.
The above-mentioned cleaning water discharge line 16 is connected to. The water injection port 56 of this embodiment has an opening / closing valve function so that the cleaning water discharge line 16 can be attached and detached.

Therefore, since the cleaning water 20 supplied from the cleaning water discharge line 16 is sprayed from the cleaning water injection hole 55 toward the gap 19 between the movable holder 52 and the cutter 4, it enters the gap 19. The earth and sand 21 are not discharged to the face side 18 and the space 19 is not clogged with earth and sand.

FIG. 4 is an enlarged sectional view taken along the line AA shown in FIG. As shown in the figure, the rotary joint 14 is composed of a fixed ring 141 provided on the excavator body 6 side (Fig. 1) and a rotary ring 142 provided on the cutter head 1 side (Fig. 1). . Fixed ring 1
41 is provided on the outer peripheral side, and the rotating ring 142 is provided on the inner peripheral side.

Fixing ring 14 provided on the excavator body 6
1, a cleaning water supply line 15 from the excavator body 6 side is provided, and a water supply continuation section 143 communicating with the cleaning water supply line 15 is provided on the inner peripheral side thereof. On the other hand, the rotating ring 142 provided on the cutter head 1 is provided with the cleaning water discharge line 16 so as to communicate with the water supply continuation unit 143. In this embodiment, the rotating ring 142 is provided with eight cleaning water discharge lines 16 at equal intervals. The eight cleaning water discharge lines 16 shown in the figure are numbered 1 to 8 for the sake of explanation. The interval and the number of the cleaning water discharge lines 16 may be appropriately set according to the number of cutters 4 and the state of earth and sand.

The water supply continuation section 143 is provided with a fixed ring 14
It is formed within a predetermined angle range of the inner circumference of 1 and has a predetermined width 14
Have four. The predetermined width 144 is defined by the water supply continuation unit 14
The cleaning water discharge line 16 communicating with the nozzle 3 is formed in a range such that there is always one, and it is determined according to the number of the cleaning water discharge lines 16.

Thus, one cleaning water supply line 15
By using the rotary joint 14 in which the cleaning water discharge line 16 communicating with the cleaning water discharge line 16 is always one, each cleaning water discharge line 16 depends on the length of the cleaning water discharge line 16 and the state of the face.
Even if there is a difference in the flow path resistance value of all the cutters 4,
A uniform amount of wash water can be distributed to

Further, by utilizing the rotating mechanism of the cutter head 1 which rotates to excavate the natural ground, each cleaning water discharge line 1
Since the intermittent rotary joint 14 that intermittently discharges the cleaning water from 6 is configured, an intermittent cleaning water supply mechanism can be configured without requiring a complicated configuration such as a dedicated distributor. .

As shown in FIG. 1, the plurality of cleaning water supply lines 15 provided in the circumferential direction of the fixed ring 141 are connected to the water supply continuation portion 143 provided at positions axially displaced from the rotary joint 14. The cleaning water is supplied from the cleaning water discharge line 16 to another movable holder 52.

FIG. 5 is an enlarged sectional view taken along line AA of the rotating ring shown in FIG. 4, and FIG. 6 is an enlarged sectional view taken along line AA of the rotating ring shown in FIG. Less than,
The intermittent cleaning water supply by the rotary joint 14 will be described.

First, as shown in FIG. 4 described above, the cleaning water supplied from the cleaning water supply line 15 provided on the fixed ring 141 side to the water supply continuation section 143 is rotated by the rotating ring 1.
The rotating ring 142 is rotated by the turning of the cutter head 1 in a state of communicating with the first cleaning water supply line 16 of the cleaning water discharge lines 16 provided at 42.
Even if the rotary ring 142 rotates in this manner, the cleaning water supply line 15 and the cleaning water discharge line 16 are in communication with each other within the predetermined width 144 of the water supply continuation unit 143.
The cleaning water is supplied from the cleaning water discharge line 16 to the cutter holder. As a result, the cutter holder 5 connected first to the cleaning water discharge line 16 is supplied with the cleaning water 20 while the cleaning water discharge line 16 rotates within the predetermined width 144 of the water supply continuation unit 143. Movable holder 52
Sediment in the gap 19 between the cutter and the cutter 4 is discharged (Fig. 3
reference).

Next, as shown in FIG.
When 2 rotates and the 1st cleaning water discharge line 16 separates from the water supply continuation part 143, all 8 cleaning water discharge lines 1
6 is in a closed state. In this embodiment, while the first wash water discharge line 16 is disengaged from the water supply continuation unit 143 and the second wash water discharge line 16 communicates with the water supply continuation unit 143, the water supply continuation unit 143 is completely the wash water discharge line. Although a range that does not communicate with 16 is provided, the next cleaning water discharge line 16 may communicate with the water supply continuation section 143 immediately after closing, and a predetermined width 144 other than this embodiment.
The water supply continuation part 143 may be formed by.

Next, as shown in FIG. 6, when the cutter head 1 rotates and the second cleaning water discharge line 16 communicates with the water supply continuation section 143, the cleaning water 20 from the cleaning water supply line 15 becomes the second. Is discharged to the cleaning water discharge line 16. As a result, the cleaning water 20 is sprayed from the cleaning water injection hole 55 of the movable holder 52 to which the second cleaning water discharge line 16 is connected, and the earth and sand in the gap 19 with the cutter 4 are discharged (see FIG. 3). . In this second cleaning water discharge line 16 as well, the cleaning water 20 is supplied while the range of the water supply continuation unit 143 is rotated, and the earth and sand in the gap 19 are discharged.

After that, as the rotary ring 142 rotates, the cleaning water discharge line 16 continues to supply water in the order of third, fourth ... Eighth, first, second ... The washing water discharge line 16 communicating with the portion 143.
The gap 19 between the movable holder 52 and the cutter 4, which are connected to each other, is sequentially and intermittently cleaned.

Such intermittent cleaning is performed in a plurality of cleaning water discharge lines 16 (see FIG. 1) provided in the axial direction of the rotary joint 14, and the gaps of all the cutters 4 that need cleaning are thereby provided. The part 19 is washed. In this way, the rotary joint 14 that intermittently supplies the cleaning water to the different cutters 4 is configured.

FIG. 7 is an AA enlarged sectional view of FIG. 1 showing another embodiment. In this embodiment, the water supply continuation portion 143 provided in the axial direction of the rotary joint 14 has a different predetermined width 144. As shown in the figure, in this embodiment, the cleaning water discharge line 16 provided in the circumferential direction of the rotary ring 142 is 8 at the cross-sectional position shown by the solid line.
6 lines (1 to 6 at the cross-sectional position in the depth direction of the paper indicated by the broken line)
Numbered). The water supply continuation unit 143 that supplies the cleaning water to the cleaning water discharge line 16 also has a different predetermined width 144.

In this way, the predetermined width 14 of the water supply continuation portion 143 is
By making 4 different, it is possible to make different the time of supplying the cleaning water 20 to one cleaning water discharge line 16 during one rotation of the rotary ring 142, and the cutter head 1
It is possible to make the cutter cleaning time different between the outer peripheral side and the central side. In this example, the predetermined width 144 of the water supply continuation part 143 is made different to change the flow time of the wash water, but a plurality of wash water discharge lines 16 are connected to each other to provide one movable holder 52 (FIG. 3). Even if the cleaning water is supplied to the same place, the water supply time to the same place can be different. These may be appropriately set according to the geology, the cutter head rotation speed, and the like.

As described above, by rotating the movable holder 52 by the rotation of the cutter head 1, cleaning water is intermittently supplied to a plurality of cleaning water discharge lines 16 by one cleaning water supply line 15, The plurality of cutters 4 are intermittently washed.

Further, since this cleaning can be carried out at all times while the cutter head 1 is rotating, the sand 21 between the cutter holder 5 and the cutter 4 is always removed on the cutting face 1 side.
It is possible to prevent the rotation failure of the cutter 4 and the uneven wear of the cutter 4 due to the rotation failure of the cutter 4. Moreover, by supplying the cleaning water intermittently between the cutter holder 5 and the cutter 4 in this manner, the roller cutter 4 can be cooled.

In this way, the cutter cleaning device 22 of the mud pressure type or mud pressure type tunnel excavator is configured so that the cutter can be replaced under high water pressure without discharging the mud and mud from the face. Even in this case, it is possible to prevent soil compaction in the cutter portion.

In the above description, the cutter head is provided with a cutter frame and the cutter can be exchanged under mud pressure or mud pressure, but the chamber side of the cutter holder holding the cutter is closed. The present invention can be applied to any cutter device as long as the cutter device may clog the soil, and the present invention is not limited to the above-described embodiment.

That is, the above-described embodiment is one embodiment, and various modifications can be made without departing from the spirit of the present invention, and the present invention is not limited to the above-described embodiment.

[0042]

The present invention is carried out in the form as described above and has the following effects.

Since the gap between the cutter holder and the cutter can be cleaned, it is possible to perform stable excavation while preventing the compaction of the soil in the cutter holder, and to replace the cutter early and prevent the construction period from being delayed. Can be configured.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a tunnel excavator including a cutter cleaning device according to an embodiment of the present invention.

FIG. 2 is a front view of the tunnel excavator shown in FIG.

FIG. 3 is an enlarged sectional view of the cutter cleaning device shown in FIG.

FIG. 4 is an enlarged cross-sectional view taken along the line AA shown in FIG.

5 is a view showing a state where the rotating ring shown in FIG. 4 is rotated AA.
It is an expanded sectional view.

FIG. 6 is an AA of the rotating ring shown in FIG.
It is an expanded sectional view.

FIG. 7 is an enlarged cross-sectional view taken along the line AA of FIG. 1 showing another embodiment of the present invention.

[Explanation of symbols]

1 ... Cutter head 2 ... Chamber 3 ... Cutter frame 4 ... Cutter 5 ... Cutter holder 6 ... Excavator body 7 ... Center connection part 8 ... Manhole 9 ... Drive motor 10 ... Slewing bearing 11 ... Revolving frame 12 ... Connecting member 13 ... Screw conveyor 14 ... Rotary joint 141 ... Fixing ring 142 ... rotating ring 143 ... Water supply continuation section 144 ... predetermined width 15 ... Washing water supply line 16 ... Cleaning water discharge line 17 ... Fixing member 18 ... Face side 19 ... Gap 20 ... Wash water 21 ... earth and sand 22 ... Cutter cleaning device

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-53994 (JP, A) JP-A-60-92599 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E21D 9/08 E21D 9/10

Claims (7)

(57) [Claims] 1. A cutter holder holding a cutter is provided on a chamber side of a cutter head, and a cleaning water injection hole for injecting cleaning water toward a gap between the cutter holder and the cutter is provided in the cutter holder , Excavator
A cleaning water supply mechanism is installed between the main body and the cutter head.
In the cleaning water supply mechanism, the excavator body side fixing ring and cover
The rotating ring on the turret head side is provided and the fixed ring is
A washing water supply line is provided, and in the circumferential direction of the rotary ring,
A plurality of cleanings for supplying cleaning water from the cleaning water supply line
Cutter cleaning device for tunnel excavator equipped with water discharge line . 2. The cleaning water injection hole is arranged toward the blade edge of the cutter, and the cleaning water is injected from the cleaning water injection hole toward the cutting face side to discharge the earth and sand in the gap portion to the cutting face side. The cutter cleaning device for a tunnel excavator according to claim 1, which is configured. 3. A fixed water supply continuation portion having a predetermined width is formed in the circumferential direction of the fixed ring in the circumferential direction of the rotary ring so that the wash water discharge line of the fixed ring communicates with the wash water supply line of the fixed ring. The cutter cleaning device for a tunnel excavator according to claim 1 or 2 . 4. The cutter cleaning device for a tunnel excavator according to claim 3 , wherein the water supply continuation portion is formed with a predetermined width such that one cleaning water discharge line communicates with the water supply continuation portion at the same time. 5. A fixed ring is provided with a plurality of cleaning water supply lines, and a plurality of cleaning water discharge lines for supplying cleaning water from the plurality of cleaning water supply lines are provided in the circumferential direction of the rotating ring. Any one of claims 1 to 4
A cutter cleaning device for a tunnel excavator according to the item. 6. The tunnel according to claim 1 , wherein the cleaning water discharged from a plurality of cleaning water discharge lines is combined to clean the same cutter. Excavator cutter cleaning device. 7. The tunnel excavator according to claim 3 , wherein the predetermined widths of the plurality of water supply continuation portions are formed with different predetermined widths so that the cleaning water supply time is different. Cutter cleaning equipment.