JP2697213B2 - Sealant supply device to seal space of shield machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for supplying a sealant to a seal space of a shield machine.

[Prior Art] Generally, a shield excavator tail portion is provided with a tail plate skin inner periphery in order to prevent earth and sand water and backing material from the outside of the shield from flowing into the inside of the shield excavator including the tail portion. A plurality of tail seals are provided in the axial direction, and a sealant is filled in a seal space formed between the tail seal, the tail skin plate, and the segment.

The portion of the tail portion of the shield machine where the seal space is provided is shown in FIGS. 6 to 9.

That is, the segments 2 are assembled in a ring shape along the inner periphery of the ring-shaped tail skin plate 1, and the earth and sand water and the backing material enter the shield machine including the tail portion 3 from the outside of the shield. In order to prevent this, one end is fixed to the inner periphery of the tail skin plate 1 along the circumferential direction between the inner peripheral surface of the tail skin plate 1 and the outer peripheral surface of the segment 2, and the other end is fixed to the outer peripheral surface of the segment 2. A plurality (three in the figure) of tail seals 4 extending rearward in the excavation direction A of the shield excavator so as to be in sliding contact with each other are arranged at predetermined intervals in the axial direction of the tail skin plate 1.

The ring-shaped seal spaces 5a and 5b partitioned by the tail skin plate 1 and the segment 2 and the front and rear tail seals 4 and 4 have lubricity in order to have pressure resistance and to enhance the sealability. A sealant such as pate grease is supplied.

The means for supplying the sealant to the seal spaces 5a, 5b is as follows: (i) The segment 2 is provided with grout holes 6a, 6b communicating with the seal spaces 5a, 5b, and these grout holes 6a, 6b
Is connected to the sealant supply mechanism to be installed in the shield machine, and the sealant is grouted from the sealant supply mechanism.
Means for supplying to the sealing spaces 5a, 5b via 6a, 6b, [ii] on the outer peripheral surface of the tail skin plate 1 from the side closer to the excavation direction A than the assembly space 7 of the segment 2 (hereinafter referred to as the front side). A plurality of supply pipes 8a, 8b are attached in parallel to the axial direction by welding over a side (hereinafter, referred to as a rear side) of the tail section 3 in the counter-digging direction B, and a front end of the supply pipes 8a, 8b is It is tapered so as to incline in the excavation direction A and is connected to the sealant supply holes 9a and 9b of the support member 9 fixed to the outer periphery of the tail skin plate 1.
The rear end of 8b is connected to the sealant supply holes 10a, 10b of the support member 10 fixed to the outer periphery of the tail skin plate 1, and the cover pipe 11 covers the axial middle of the supply pipes 8a, 8b. The cover member 11 is fixed to the outer peripheral surface of the tail skin plate 1, and the rear end of the supply pipe 8a is sealed with a sealing space 5a.
The rear end of the supply pipe 8b communicates with the seal space 5b through through holes 12a and 12b formed in the tail skin plate 1, respectively, so that the sealant supply holes 9a and 9b of the support member 9 are provided.
Is connected to the sealant supply mechanism installed in the shield machine via the connection pipes 13a and 13b, and from the sealant supply mechanism, the connection pipes 13a and 13b, the supply holes 9a and 9b, the supply pipes 8a and 8b, and the through holes 12a, 1
There is a means for supplying the sealant to the seal spaces 5a and 5b sequentially through 2b.

[Problems to be Solved by the Invention] However, in the means [i] described above, although there is no need to protrude outside the shield machine and provide piping, the relative position of the tail seal 4 and the grout holes 6a, 6b is not required. Since the relationship changes during excavation, the sealant is
b cannot be continuously supplied.

In the means [ii] described above, the sealant can be continuously supplied to the seal spaces 5a and 5b, but the outer periphery of the tail skin plate 1 protrudes by the approximate diameter of the supply pipes 8a and 8b. Therefore, the entrance packing is lifted when moving horizontally from the pier at the start of excavation, causing water leakage, and in particular, in hard ground, the protruding portion becomes a propulsion resistance and causes an increase in thrust. .

The present invention has been made in view of the above circumstances, and provides a sealant supply device to a seal space of a shield excavator capable of continuously supplying a sealant during excavation to a seal space and reducing propulsion resistance in hard ground. The purpose is to do.

[Means for Solving the Problems] According to the present invention, between a ring-shaped tail skin plate and a segment assembled in a ring shape along the inner periphery of the tail skin plate, the tail skin plate is fixed to the inner periphery of the tail skin plate; In a shield excavator in which a plurality of tail seals that can be slid on the outer periphery of the segment are installed at required intervals in the axial direction of the tail skin plate, and the seal space is formed by being surrounded by the tail seal, the segment and the tail skin plate. A cut-out portion extending from the front side of the segment assembling space to a seal space position on the rear side of the segment assembling space, and a closing material having a sealant passage is fitted into the cut-out portion of the tail skin plate; A rear end of the sealant passage communicates with the seal space, and a front end of the sealant passage is provided. The present invention relates to an apparatus for supplying a sealant to a seal space of a shield machine, wherein a sealant supply pump is connected to a side end.

[Operation] The sealant can be continuously supplied to the seal space even while digging through the sealant supply passage located in the tail skin plate, and the sealant supply passage is located in the tail skin plate. The protruding dimension from the outer peripheral surface of the tail skin plate can be reduced, and the propulsion resistance can be reduced.

Embodiment An embodiment of the present invention will be described with reference to FIGS.

In the drawings, the portions denoted by the same reference numerals as those in FIGS. 6 to 9 represent the same components.

At a plurality of locations on the outer peripheral side of the tail skin plate 1 extending from the front side of the assembling space 7 of the segment 2 to the mounting position of the tail seal 4, groove-shaped notches 14 along the axial direction of the tail skin plate 1 are provided. The notch portion 14
And a plurality of (two in the figure)
The closing material 15 provided with the sealant supply grooves 16a and 16b serving as the sealant passages is inserted into the cutout portion of the tail skin plate 1.
14 and welded around to sealant supply groove 16 for plugging material 15
a, 16b are sealed from the outside.

In addition, the front surface of the closing material 15 protruding from the outer peripheral surface of the tail skin plate 1 is tapered so as to be inclined in the digging direction A, and both width ends of the closing material 15 are fitted to the tail skin plate 1 by welding. The excavator is tapered so as to be inclined toward the portion so that the propulsion resistance is reduced when the excavator advances. Further, injection holes 17a and 17b for communicating the sealant into the seal spaces 5a and 5b through the seal spaces 5a and 5b and the sealant supply grooves 16a and 16b of the sealing material 15 are formed on the rear side of the tail skin plate 1. At the same time, injection holes 18a and 18b for injecting the sealant into the seal supply grooves 16a and 16b of the sealing material 15 are formed in the front side of the tail skin plate 1, and one end of the tail skin plate 1 is filled with the injection material. The injection holes 20a, 18b communicating with the holes 18a, 18b and having the other end opened toward the tail skin plate 1.
Attach injection block 19 with 20b. Further, the sealant supply pump installed in the shield machine and the injection holes 20a and 20b of the injection block 10 are connected via a rubber hose 21 to supply the sealant from the sealant supply pump with the rubber hose 21 and the injection hole 20a of the injection block 19. , 20b, injection holes 18a, 18b of tail skin plate 1, sealing agent supply grooves 16a, 1
6b, the sealing space 5a, 5b can be injected through the injection holes 17a, 17b of the tail skin plate 1 sequentially.

 The operation will be described below.

The sealant discharged from the sealant supply pump installed in the shield machine is supplied with rubber hose 21 and injection block 19.
Injection holes 20a and 20b and tail skin plate 1 injection holes 1
8a, 18b are sequentially injected into the sealant supply grooves 16a, 16b of the sealing material 15, and the injected sealant is filled with the sealant supply grooves 16a, 16b.
The sealing agent reaches the mounting end of the tail seal 4 at 16b, and the sealing agent is injected into the sealing spaces 5a and 5b from the injection holes 17a and 17b of the tail skin plate 1, and the sealing agent is filled in the sealing spaces 5a and 5b. Therefore, the sealant can be continuously supplied to the seal spaces 5a and 5b without being affected by the excavation work. Also, sealant supply grooves 16a, 16 serving as sealant supply passages
By locating b in the tail skin plate 1, the projecting dimension in the radial direction from the outer periphery of the tail skin plate 1 can be significantly reduced as compared with the conventional case, so that the propulsion resistance of the shield machine can be reduced.

Next, another embodiment of the present invention will be described with reference to FIG.

Notch portions having no bottom along the axial direction of the tail skin plate 1 are provided at a plurality of positions in the circumferential direction of the tail skin plate 1 from the front side of the assembly space 7 of the segment 2 to the mounting position of the tail seal 4. A sealing material supply hole 23a, 23b serving as a plurality of (two in the figure) sealing agent passages, which are formed in the longitudinal direction, is fitted into the cutout portion, and the periphery thereof is welded. Sealant supply hole 23 for plugging material 22
The front ends of the a, 23b are connected to the sealant supply pump installed in the shield machine, and the tail seal 4 mounting ends of the sealant supply holes 23a, 23b are connected to the seal spaces 5a, 5b. 4 to 4, the sealant can be continuously supplied to the seal spaces 5a and 5b even during the excavation, and the tail skin plate 1 Since the projecting dimension in the radial direction from the outer periphery can be made significantly smaller than in the past, the propulsion resistance of the shield machine can be reduced.

The present invention is not limited to the illustrated and described embodiment, but may be applied to a shield machine having a tail portion having one or three or more seal spaces.
A sealing material having one sealant passage such as a sealant supply groove or a supply hole is fitted into a cutout portion of the tail skin plate to supply the sealant to an appropriate number of seal spaces from one sealant passage. , Etc. are arbitrary, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effects of the Invention] As described above, according to the sealant supply device for the seal space of the shield machine according to the present invention, various excellent effects as described below are exhibited.

[I] Since the sealant can be continuously supplied to the seal space even during the excavation of the shield, the supply amount and the supply pressure of the sealant to the seal space can be controlled at all times, thereby coping with the high pressure of sediment water and backfill from the outside of the shield. it can.

[Ii] The projection size from the shield outer diameter can be made significantly smaller than in the case where the sealant supply pipe is attached outside the conventional tail skin plate, and the entrance packing of the shield starter can be sufficiently sealed. .

[Iii] As described in the above [ii], the protrusion size from the outer diameter of the shield can be greatly reduced, so that the propulsion resistance can be reduced even on hard ground, and there is no need to increase the thrust, so that it is economical.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a configuration of a sealant supply device to a seal space of a shield machine according to the present invention, and FIG.
FIG. 3 is an enlarged view in the direction of arrow III in FIG.
FIG. 4 is an enlarged view in the direction of arrow IV in FIG. 1, and FIG. 5 is a cross-sectional view showing another embodiment of a sealant supply device to the seal space of the shield machine according to the present invention. FIG. 6 is a longitudinal sectional view showing a configuration of a sealing agent supply device to a sealing space of a conventional shield machine, FIG. 7 is a view taken in the direction of arrow VII in FIG. 6, FIG. 8 is an enlarged view of the VIII direction in FIG. 6, and FIG. 9 is an enlarged view of the IX direction in FIG. In the figure, 1 is a tail skin plate, 2 is a segment, 4 is a tail seal, 5a and 5b are seal spaces, 7 is a segment 2
Assembly space, 14 is the notch, 15 is the closing material, 16a, 16
b is the sealant supply groove (sealant passage), 17a, 17b, 18a, 18b
Is an injection hole, 19 is an injection block, 20a and 20b are injection holes, 21
Is a rubber hose, 22 is a closing material, 23a and 23b are sealant supply holes (sealant passages), and A indicates the direction of excavation.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Ito 13th, Showa-cho, Minato-ku, Nagoya City, Aichi Prefecture Ishikawajima Harima Heavy Industries Co., Ltd. Nagoya Plant (56) References JP 50-103127 (JP, A) Kaihei 3-65796 (JP, U) Japanese Utility Model Showa 62-190794 (JP, U)

Claims (1)

(57) [Claims] 1. A plurality of tail skin plates which are fixed to the inner periphery of the tail skin plate and slidably contact the outer periphery of the segment between a ring-shaped tail skin plate and segments assembled in a ring shape along the inner periphery of the tail skin plate. In the shield machine where the tail seals are installed at required intervals in the axial direction of the tail skin plate, and the seal space is formed by being surrounded by the tail seal and the segment and the tail skin plate, the tail skin plate may be provided with a segment. A notch portion extending from the front side to the rear seal space position of the assembly space is provided, and a closing material having a sealant passage is fitted into the notch portion of the tail skin plate, and a rear end of the sealant passage is provided. And a sealant supply pump at the front end of the sealant passage. Sealing agent supply device to the sealing space of the shield machine characterized by comprising linked.