JPH0452310Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention forms a tail seal portion of the shield along the outer periphery of a segment formed in an annular shape in a shield tunneling machine, and also forms a tail seal portion of the shield along the outer periphery of a segment formed in an annular shape. Pipes and passages extending from the tail seal part to the tail seal part are provided at predetermined intervals in the circumferential direction of the tail seal part, and from these piping and passages to the tail seal part, a pump or the like having a relatively high viscosity is provided. The present invention relates to an improvement in a sealing material filling device for filling sealing material that is pressurized and fed by.

[Prior Art] This type of conventional sealing material filling device operates a seal injection pump 14 and connects it to a valve 33 through a supply pipe 15, as shown in FIGS. 5, 6, and 7, for example. , the inner tail seal member 241 and the outer tail seal member 24 from the plurality of distribution pipes 13 through the tail passages 34 and 35 and the inlet 27.
A sealing material 28 is injected into the gap 25 between the two. After the area close to the first injection port 27 is filled with the sealing material 28, the second injection port 27,
The sealing material 28 is filled from the third injection port 27 in the same manner. At this time, the injection amount is adjusted and switched by manually operating the valve 33.

[Problems to be solved by the invention] However, unlike water and air, the sealing material 28
Since it has a relatively high viscosity and is pressurized, manual valve adjustment cannot ensure uniformity.
When the sealing material 28 is injected above a predetermined pressure, the pressure of the sealing material 28 pushes the outer tail sealing member 242 apart, and the segment 2
A gap was created between the sealing material 28 and the outer periphery of the sealing material 28, causing the sealing material 28 to escape and wasted.

In addition, in locations where the gap 25 is insufficiently filled, the backfilling agent 29, earth sand 30, and groundwater may enter the gap 25 between the inner and outer tail seal members 241, 242, and furthermore, the inner The backfilling agent 29, earth sand 30, ground water, etc. that have passed through the tail seal member 241 and entered the shield machine interior 31, causing trouble in the work.

The present invention was developed in order to solve the problems of the conventional technology, and it is a new invention that improves the water-stopping properties of the tail seal and reliably feeds the sealing material into the gap between the inner and outer tail seal members. The purpose of the present invention is to provide a sealing material dispensing device.

[Means for Solving the Problems] In order to achieve the above object, the present invention forms a tail seal portion of the shield along the outer periphery of an annular segment, and also seals the tail portion from inside the shield machine. Distribution pipes and passages are provided at predetermined intervals in the circumferential direction of the tail seal part, and the distribution pipes and passages that reach the tail seal part through the pipes have a relatively high viscosity and are pumped by a pump or the like. A device for filling sealing material that is fed under increased pressure includes a cylindrical valve housing, which is provided at a predetermined interval in the circumferential direction of the valve housing, and is connected to the distribution piping, etc., to fill the sealing material. a discharge port for discharging;
A rod-shaped valve body is disposed within the valve housing and rotates in sliding contact with the inner circumferential wall of the valve housing to open and close the discharge port, and the sealing material is formed within the valve body along its longitudinal direction and is fed under increased pressure. a sealing material supply chamber for introducing the sealant into the valve body; and a sealing material supply chamber formed in the valve body so as to penetrate radially outward from the supply chamber, and when the valve body rotates, the sealing material is sequentially opened to the discharge port. The apparatus includes a distribution passage for distributing the sealing material from the supply chamber to the discharge port, and a valve element driving means for rotating the valve element.

[Function] In the above configuration, when the valve body in which the sealing material in the sealing material supply chamber is pressurized by a pump or the like is rotated by the driving means, the above-mentioned supply is applied to each discharge port opening in the circumferential direction of the valve housing. The distribution passages communicating with the chamber are sequentially opened, and the sealing material is intermittently fed and filled into the tail seal portion from each distribution pipe communicating with the discharge port.

[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described in detail based on the drawings. Note that the same reference numerals are used for components common to the conventional one.

Fig. 1 is a partially cutaway plan view of the main parts of the sealing material distribution device of the present invention, Fig. 2 is a sectional view taken along the line - - in Fig. 1, and Fig. 3 is a valve housing, which is the main part of the same dispensing device. This is a developed diagram.

As shown in the figure, the sealant dispensing device 1 of the present invention includes a valve housing 2, a discharge port 3, and a valve body 4.
, a sealing material supply chamber 5 , a distribution passage 6 , and a valve body driving means 7 .

Specifically, the valve housing 2 has a cylindrical shape having an inner diameter that is approximately the same as the diameter of the valve body 4 described later, and a length that is approximately the same as the axial length of the valve body 4. The valve body 4 is accommodated and pivotally supported.

As shown in FIG.
The discharge ports 3 are opened in a series of groups,
A second series of discharge ports 60, a third series of discharge ports 70, and a fourth discharge port group 80 are arranged at regular intervals in parallel with the first series of discharge ports 50. has been established (see Figures 1 and 3).

Discharge ports 51, 52 of the first series of discharge port group 50...
...57 and the second outlet group 61, 62...67
As shown in FIG. 3, the discharge ports 71, 72...77 of the third discharge port group 70 and the fourth discharge ports are arranged in a staggered manner. 80
The discharge ports 81, 82, . . . , 87 of the group are similarly arranged in a staggered pattern.

A blind plug 8 is provided near the first outlet group 50 and on the opposite side from the second outlet outlet group 60 (see FIGS. 1 and 3).

Further, on the inner circumferential surfaces of both sides of the valve housing 2,
The bearing metal 9 is fitted, and cover mounting flanges 201 and 202 are provided on both outer circumferential surfaces of the bearing metal 9 (FIG. 1).

On the other hand, the valve body 4 has a rod shape inside the valve housing 2 and rotates in sliding contact with the inner circumferential wall of the valve housing 2 to open and close the discharge port 3, and has a blind hole shape in the longitudinal direction along its axis. In addition to providing a sealing material supply chamber 5,
Five distribution passages 6 are provided that penetrate outward in the radial direction from the sealing material supply chamber 5 (see FIGS. 1 and 2). A projecting shaft 401 extending along the axis is provided on the end surface opposite to the end surface where the supply chamber 5 is opened (FIG. 1).

Three distribution passages 5 among the five distribution passages 6
The sets 00, 600, and 900 are opened in a direction that is 180 degrees out of phase with the other two sets of distribution passages 700, 800 (see FIGS. 1 and 2). That is, the three distribution passages 500, 600, and 900 among the five distribution passages 6 have the same phase,
The other two distribution passages 700 and 800 are opened with the same phase (see FIG. 1).

The three distribution passages 500, 600,
Among the distribution passages 900, a distribution passage 500 faces the inner circumferential surface of the valve housing 2 where the first series of discharge ports 50 is opened, and the other distribution passages 600 have the second series of discharge ports 60 opened. facing the inner circumferential surface, and
The remaining distribution channel 900 faces the inner circumferential surface on which the blind plug 8 is provided (see FIG. 1). A ring-shaped groove 402 is provided on the outer periphery of the valve body 4 facing the inner periphery on which the blind plug 8 is provided (see FIG. 1).

On the other hand, the two distribution passages 700 and 800 of the five distribution passages 6 are connected to the third discharge port group 70 and the fourth discharge port group of the valve housing 2, as shown in FIG. Discharge port groups 80 are provided facing each inner circumferential surface.

When the valve body 4 is inserted into the valve housing 2, one end of the seal material supply pipe 10 is connected to the collar 201 of the valve body 4 on the opening side of the seal material supply chamber 5. The cover 11 is assembled,
A cover 12 with a boss is attached to the collar 202 on the side of the protruding shaft 401 of the valve body 4 (Fig. 1), and each discharge port 50, 60, 70,
80 includes distribution pipes 150, 160, 17, respectively.
0,180 is installed (first
(See Figure 2).

Each discharge port 3 of each series of discharge port groups 50, 60, 70, 80 has a corresponding distribution pipe group 150, 16
0, 170, 180, will be connected as a pair.

For example, as shown in FIG. 2, in the second discharge group 60, there are seven discharge ports 61, 62...67.
Then, one ends of the seven distribution pipes 161, 162, .
7 distribution pipes 171, 17 on 1, 72...77
2...177 are sequentially connected in pairs.

Then, each series of distribution piping 151 to 157, 16
The other ends of 1 to 167, 171 to 177, and 181 to 187 are passages 3 provided in the tail part of the shield machine, respectively.
4 and communicates with the tail seal gap 25 via a passage 35 and an inlet 27. (Figure 4,
(See Figure 5).

Reference numeral 16 denotes a shaft seal interposed between the protruding shaft 401 and the boss portion 121 of the bossed cover 12 (FIG. 1).

A chain sprocket 17 is fixed to the protruding portion of the extending shaft 401, and a roller chain 21 is stretched between the chain sprocket 17 and a chain sprocket 20 fixed to the shaft 19 on the reducer 18 side. has been done. 22 is this reducer 18
23 is an electric motor that drives this reducer 1.
8 and a frame on which the valve housing 2 is installed.

The valve body driving means 7 is composed of the chain sprocket 17, the speed reducer 18, the shaft 19, the chain sprocket 20, the roller chain 21, the electric motor 22, and the like.

As shown in FIGS. 4 and 5, each distribution pipe 13 is connected to a passage 34 passing through the tail plate 32, and this passage 34 is connected to a passage 35 provided in the axial direction on the outer periphery of the tail plate 32. The passage 35 is connected to the inlet 27, and the inlet 2
7 communicates with the gap 25 between the inner and outer tail seal members 241 and 242.

When the thickness portions 321 and 322 of the tail plate 32 are large, the passages 34 and 35 may be formed within the thickness thereof.

Next, the operation of the embodiment configured as described above will be explained.

Assuming that 28 inlets 27 are opened at certain intervals in the tail portion of the shielding machine corresponding to the gaps 25 of the assembled tail seal 24 as shown in FIGS. 4 and 5, the valve Twenty-eight distribution pipes 13 penetrating through the housing 2 are set in pairs at each of the injection ports 27.

Now, when the sealant injection pump 14 is operated and the electric motor 22 is operated (see Fig. 1), the reducer 18, shaft 19, chain sprocket 20, roller chain 21, chain sprocket 17,
The valve body 4 rotates via the extending shaft 401.

At this time, while the valve body 4 rotates from 0 degrees to 180 degrees, the first distribution passage 500 shown in FIG.
52, 53, 54, 55, 56, 57, and increase the pressure of the sealing material 28 in each distribution pipe 151, 152...157 connected to each discharge port 51, 52...57. Each passage 34, 3
5 and from the inlet 27 to the tail seal 24
The sealing material is intermittently pushed out into the gap 25, and the second distribution passage 600 has a second series of seven discharge ports 61, 62...67. Each distribution pipe 161, 162...16 opens sequentially at different timings and is connected to them.
7 and increases the pressure of the sealing material 28 in each passage 34, 35.
The sealing material 28 is intermittently pushed out through the injection port 27 into the gap 25 of the tail seal 24.
During this time, the third and fourth distribution passages 700, 800
is closed by the inner circumferential wall surface of the valve housing 2.

Subsequently, while the valve body 4 rotates from 180 degrees to 360 degrees, the first and second distribution passages 50 are
0,600 becomes closed by the inner circumferential wall surface of the valve housing 2.

On the other hand, while the valve body 4 rotates from 180 degrees to 360 degrees, as shown in FIG.
...77 and the sealing material 28 in each distribution pipe 171, 172...177 connected to them
The sealing material 28 is intermittently pushed out from the injection port 27 into the gap 25 of the tail seal 24 through the corresponding passages 34 and 35.
The distribution passage 800 has a fourth series of seven discharge ports 8.
1, 82...87 are sequentially opened, the pressure of the sealing material 28 in each distribution pipe 181, 182...187 connected thereto is increased, and each corresponding passage 34, 3 is opened.
5, the sealing material is intermittently pushed out from the injection port 27 into the gap 25 of the tail seal 24.

Furthermore, while the valve body 4 rotates from 360 degrees to 540 degrees, the same operation as that during the rotation from 0 degrees to 180 degrees is repeated, and so on. first and second distribution passages 150, 160, and third and fourth distribution passages 1.
The operations 70 and 180 are repeated.

At that time, if the rotational speed of the valve body 4 is increased, the number of rotations per unit time increases, but at the same time, the sealing material 28 is fed from the distribution passage 6 to each discharge port 3 in one rotation.
On the other hand, if the rotational speed of the valve body 4 is slowed down, the rotation per unit time becomes smaller, and the amount of sealing material 28 that is fed from the distribution passage 6 to each discharge port 3 in one rotation decreases. will increase.

Note that the fifth distribution passage 900 communicates with the ring-shaped groove 402, so when connecting the sealant distribution pipe 190 to the blind plug 8 facing this groove 402 (FIG. 1), the distribution pipe The sealing material is continuously fed from the distribution pipe 13 connected to the pipe 190.

In the embodiment described above, the discharge ports are arranged in four groups in seven groups, and four distribution passages are provided facing each group, but the distribution device of the present invention is not limited to this. Rather, the number of outlets forming a group can be selected arbitrarily, and the number of outlets can be selected arbitrarily, whether single or multiple. Combinations with numbers can also be made freely.

Further, in the above embodiment, the sealing material supply chamber is provided along the axis of the rod-shaped valve body, but it can also be provided at a position away from the axis. The examples are not limited.

[Effects of the invention] As described above, the sealant distribution device according to the invention includes a cylindrical valve housing, a valve housing provided at a predetermined interval in the circumferential direction of the valve housing, and pipes and passages each provided with a cylindrical valve housing. A discharge port is connected to the discharge port for discharging the sealing material, and the sealing material is rotated in sliding contact with the inner circumferential wall of the valve housing and is molded along the longitudinal direction of the valve housing, pressurized, and fed into the valve housing. a sealant supply chamber for guiding the
A valve body is formed to penetrate radially outward from the supply chamber, and when the valve body rotates, it sequentially opens the discharge port to distribute the sealing material from the supply chamber to the discharge port. distribution passages and a valve body driving means for rotating the valve body, the distribution piping communicating with each distribution passage is set in the passage of the tail part leading to the injection port of the tail seal part. When the valve body is rotated, the sealing material, which is pressurized and fed by a pump or the like, passes through the tail of the shield, which is formed by an annular gap defined by the outer periphery of the segment, the inner and outer tail seal members, and the tail plate. The entire area of the seal is automatically filled almost simultaneously under uniform feeding pressure, forming an annular tail seal of homogeneous density made of relatively high viscosity sealing material there, and the tail When forming the seal, the outer tail seal member is partially expanded to reliably prevent backfilling agent, earth sand, water, etc. from entering the excavation work section. Note that the sealing material can also be supplied to the inner diameter side of the segment.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of the main parts of the sealing material distribution device of the present invention, Fig. 2 is a sectional view taken along the line - - in Fig. 1, and Fig. 3 is a valve housing, which is the main part of the same dispensing device. Developed view, FIG. 4 is a cross-sectional view of a working state using the same distribution device as above, FIG. 5 is a longitudinal sectional view of a working state using a conventional dispensing device, and FIG. 6 is a cross-sectional view taken along the line -- of FIG. , FIG. 7 is a sectional view taken along the line -- in FIG. 5. In the figure, 1 is a sealing material distribution device, 2 is a valve housing, 3 is a discharge port, 4 is a valve body, 5 is a sealing material supply chamber, 6 is a distribution passage, and 7 is a valve body driving means.

Claims (1)

[Scope of utility model registration request] A tail seal portion of the shield is formed along the outer periphery of the annularly formed segment, and piping and passages from inside the shield machine through the tail portion to the tail seal portion are formed in a predetermined direction in the circumferential direction of the tail seal portion. In an apparatus for filling a tail seal part with a sealing material having a relatively high viscosity and being pressurized and fed by a pump or the like from these pipes and passages, the valve housing is provided at intervals, and A discharge port is provided in the valve housing at a predetermined interval in the circumferential direction and is connected to the piping and the passage to discharge the sealing material, and a discharge port is provided in the valve housing and rotates in sliding contact with the inner circumferential wall thereof. a rod-shaped valve body for opening and closing the discharge port; a sealing material supply chamber formed along the longitudinal direction of the valve body for guiding the pressurized and fed sealing material into the valve body; A valve body is formed to penetrate radially outward from the supply chamber, and when the valve body rotates, the sealing material is sequentially opened to the discharge port to distribute the sealing material from the supply chamber to the discharge port. A sealing material distribution device comprising a distribution passage and a valve body driving means for rotating the valve body.