JPH0452311Y2 - - 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. Piping and an inlet extending from the pipe to the tail seal part via the tail part and an inlet are provided at a predetermined interval in the circumferential direction of the tail seal part, and a pump or the like having a relatively high viscosity is connected from these pipes and the inlet to the tail seal part. 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] A conventional sealing material filling device of this type uses one injection nozzle 30, an outer tail seal member 222 and an inner tail seal member 221, as shown in FIGS. 8 and 9, for example. The sealant injection pump 26 is actuated by penetrating the first injection port 701 of the segment 21 corresponding to the gap 23 between the gaps 2
A sealing material 11 is injected into 3. And the first
Once the area close to the injection port 701 is filled with the sealing material 11, the second and third injection ports 70 are filled in the following order.
2,703, the sealing material 11 is filled in the same manner. At this time, the injection amount is adjusted by controlling the operating time of the sealing material injection pump 26.

[Problems to be solved by the invention] However, unlike water or air, the sealing material 11 has a relatively high viscosity and is pressurized, so the adjustment depending on the length of operation time of the sealing material injection pump 26 is not uniform. When the sealing material 11 is injected in excess of the predetermined injection amount without ensuring that the
1 pushes and expands the outer tail seal member 221,
A gap was created between this and the outer periphery of the segment 21, and the sealing material 11 leaked from the gap, resulting in wastage. Conversely, in places where the gap 23 is insufficiently filled, the backfilling agent 27 and earth and sand 28
and groundwater from the inner and outer tail seal members 221, 2.
22 into the gap 23,
Furthermore, the backfilling agent 27, earth and sand 28, groundwater, etc. pass through the inner tail seal member 221 and enter the inside of the shield machine 29, causing trouble in the work.

The present invention was developed in order to solve the problems of the conventional technology, and is a novel technology that improves the water-stopping properties of the tail seal and can reliably feed the sealing material into the gap between the inner and outer tail seal members. An object of the present invention is to provide a sealant dispensing device.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a tail seal portion of the shield is formed along the outer periphery of a segment formed in an annular shape, and the tail seal portion is removed from inside the shield machine. A pipe that reaches the tail seal part through the pipe and an injection port are provided at a predetermined interval in the circumferential direction of the tail seal part, and these pipes and the injection port are connected to the tail seal part with a relatively high viscosity and are not injected by a pump or the like. This device includes a cylindrical valve housing, which is provided at a predetermined interval in the longitudinal direction of the valve housing, and is connected to distribution piping to discharge the sealant. a rod-shaped valve body that rotates in sliding contact with the inner circumferential wall of the valve housing to open and close the discharge port, and a rod-shaped valve body that is located at least on the opposite side of the discharge port and that extends along the longitudinal axis of the valve housing. a sealing material supply chamber formed along the direction and for guiding the pressurized and fed sealing material into the valve body; The supply chamber and the discharge port are selectively communicated with each other by rotation of the valve body, which is formed with angle differences sequentially along the valve body, and the discharge port is opened to distribute the sealing material. The valve body includes a distribution passage and a valve body driving means for rotating the valve body.

[Function] In the above configuration, by rotating the valve body using the driving means, the seal material is pressurized and transferred to the seal material supply chamber by a pump, etc., so that each distribution passage passing through the valve body is sequentially transferred to the seal material supply chamber. The discharge port is communicated with the supply chamber, and the tail seal portion is filled with sealing material from each distribution pipe and injection port communicating with the discharge port at a uniform supply pressure in proportion to the circumferential direction. Become.

[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 sealant dispensing device of the present invention, Fig. 2 is a sectional view taken along the line of Fig. 1, and Fig.
The figure is a perspective view of the valve body, which is the main part of the above distribution device, and the fourth
The figure is an explanatory view of the arrangement of distribution passages of the valve body, and FIG. 5 is a front view showing the distributing device as described above in use.

As shown in the figure, the sealing material distribution device 1 of the present invention includes a cylindrical valve housing 2, discharge ports 3 provided at predetermined intervals along the longitudinal direction of the valve housing 2, and a valve housing 2. 2, and a sealing material supply chamber 5 formed in the valve housing 2 on the opposite side of the discharge port 3.
, a distribution passage 6 formed in the valve body 4 , and a valve body driving means 7 .

Specifically, the valve housing 2 is a cylindrical body having an inner diameter that is substantially the same as the diameter of the valve body 4 described later, and a length that is substantially the same as the length in the axial direction of the valve body 4. 201, in which the valve body 4 is rotatably housed and pivotally supported. In addition, the openings at both ends have lids to seal the inside.
202 and 203 are provided.

The valve housing 2 is provided with discharge ports 3 at regular intervals along the axial and longitudinal directions, as shown in FIG. In the illustrated example, 14 of these discharge ports 3 are formed. These discharge ports 3 are sequentially referred to as 301, 302, 303, . . . 314. Further, the valve housing 2 is provided with a preliminary discharge port 8 in addition to the discharge port 3 described above. In a specific embodiment, it is formed at the outermost side of the discharge ports 3 arranged in the valve housing 2 .

In addition, as shown in FIG. 1, this valve housing 2
Bearing metals 9 are fitted onto the inner circumferences on both sides of the valve housing 2, and are configured to rotatably support both ends of the valve body 4 inserted into the valve housing 2. Also,
The lids 202, 2 are provided at both ends of the valve housing 2.
Flanges 211 and 212 for supporting 03 are provided.

Furthermore, the above-mentioned discharge port 3 of this valve body housing 2
A sealing material supply chamber 5 is provided along the entire axial length of the side that is 180 degrees out of phase with the side where the sealing material supply chamber 5 is formed.

As shown in FIGS. 1 and 2, this sealing material supply chamber 5 protrudes along the axial direction of the valve housing 2 and in the radial direction, and opens along the longitudinal direction of the valve body 4 with a substantially U-shaped cross section. It is formed by a groove 501 facing towards the bottom. Further, this sealing material supply chamber 5 is provided with a sealing material supply port 502 for introducing the sealing material pressurized by a pump or the like.
A hose 10 connected to a sealing material supply source such as a pump is connected to this supply port 502.

On the other hand, a valve body 4 provided within the valve housing 2
has a rod shape that rotates in sliding contact with the inner circumferential wall of the valve housing 2, and has a distribution passage 6 for opening and closing the discharge port 3 and distributing the sealing material from the supply chamber 5. .

As shown in FIG. 3, the distribution passage 6 passes through the valve body 4 so as to traverse the valve body 4 in its radial direction, and is formed sequentially at different angles along its longitudinal direction. Furthermore, fourteen distribution passages 6 are formed corresponding to the number of the discharge ports 3. Below, these 14 distribution passages are sequentially 601, 602, 60
3,...614. When viewed in cross section, these distribution passages 6 are 180 mm wide as shown in
14 distribution passages 601 with an angular difference dividing the degree into 14 equal parts,
602, . . . 614 are penetrated. Therefore, as shown in FIGS. 2 and 5, when the valve body 4 is rotated, the supply chamber 5 and the discharge port 30 are
1, 302, 303, .

The valve body 4 is provided with an annular groove 401 along the circumferential direction, as shown in FIG. It is configured such that the sealing material is transferred from the supply chamber 5.

In addition, as shown in FIGS. 1 and 3, the valve body 4
An input shaft 402 is integrally formed with one end thereof extending outward from the valve housing 2, and is connected to a valve body driving means 7, which will be described later. This input shaft 402 is provided to pass through the lid body 203, and a shaft seal 13 is provided in the penetrating portion.

The discharge port 3 has injection ports 70 provided at predetermined intervals along the circumferential direction of the tail seal portion.
0 (see FIGS. 5 and 8), the distribution piping 100 is attached with one end connected to the connection port 25 of the piping 24 provided in the tail portion of the shield machine so as to communicate with each other (see FIGS. 5 and 8). Distribution piping sequentially 101, 10
2, 103, ... 114).

As shown in FIG. 1, a chain sprocket 14 is attached to the input shaft 402, and the chain sprocket 14 and the shaft 16 on the reducer 15 side are connected to each other.
A roller chain 18 is stretched between the chain sprocket 17 and the chain sprocket 17 fixed to the roller chain 18. 19 is an electric motor that drives this reducer 15;
is a frame on which this reducer 15 and the valve housing 2 are installed.

The valve body driving means 7 is composed of the chain sprocket 14, a reduction gear 15, a shaft 16, a chain sprocket 17, a roller chain 18, an electric motor 19, and the like.

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

As shown in FIG. 5, 14 injection ports 700 (sequentially 701, 702 ，
703,...714) are opened, the valve housing 2 is connected to the piping 24 and piping connection port 25 provided in the tail portion leading to the inlet 700.
Each of the 14 distribution pipes 101 to 114 communicating with
They are set in pairs in each of the injection ports 701-714.

Now, when the sealant injection pump 26 is operated and the electric motor 19 is operated (see Fig. 1), the reduction gear 15, the shaft 16, and the chain sprocket 1 are activated.
7. The valve body 4 rotates via the roller chain 18, chain sprocket 14, and input shaft 402.

At this time, the sealing material supply chamber 5 of the valve housing 2
The sealing material 11 that is being fed under increased pressure into the
While the valve body 4 rotates half a turn, that is, from 0 degrees to 180 degrees, each distribution passage 6 sequentially connects the corresponding discharge port 3 and the sealing material supply chamber 5. Distribution piping 10 connected to
0 and each of these distribution pipes 100 is intermittently pushed out into the gap 23 of the tail seal 22 from the injection port 700 of the tail portion communicating with each of these distribution pipes 100.

That is, first, the first distribution passage 601 connects the sealing material supply chamber 5 and the first discharge port 301, and after an angle difference of 180°/14, the second distribution passage 602 communicates with the supply chamber 5. 5 and the second discharge port 302, and further, after an angular difference of 2×180°/14, the third distribution passage 603 communicates the supply chamber 5 and the third discharge port 303, Below, sequentially n×
180°/14 angular difference (n is 3 to 13)
In a cycle in which the fourteenth distribution passage 614 communicates with the fourteenth outlet 314, and finally the fourteenth distribution passage 614 communicates the supply chamber 5 with the fourteenth outlet 314, each outlet 301 ,302,...314
Distribution piping 101, 102,...114 connected to
and injection ports 701, 7 in the tail portion leading to these
Gap 2 of the tail seal 22 from 02,714
The sealing material 11 is extruded over the entire area inside the container 3.

On the other hand, the valve body 4 rotates for the next half turn, that is,
During the rotation from 180 degrees to 360 degrees, the openings of each distribution passage 6 that coincided with the above-mentioned rotation from 0 degrees to 180 degrees are reversed so that the supply chamber 5 and the discharge port 3 are connected to each other. By communicating with each other, the sealing material 11 passes through the same distribution passage 6 to the distribution piping 100 connected to each discharge port 3 and the inlet 700 of the tail portion communicating with each distribution piping 100 to the tail seal 22, as described above. It is intermittently pushed out into the gap 23.

Thereafter, the cycle of such operations is repeated to fill the gap 23 with the sealing material 11.

At this time, if the rotational speed of the valve body 4 is increased, the number of rotations per unit time will increase, but on the other hand, the amount of sealing material 11 fed from the distribution passage 6 to the discharge port 3 in one rotation will decrease; If the rotational speed of the valve body 4 is slowed down, the number of rotations per unit time will decrease, and the amount of sealing material 11 fed from the distribution passage 6 to the discharge port 3 will increase in one rotation.

Note that since the backup outlet 8 communicates with the ring-shaped groove 401, when connecting the sealant distribution pipe 115 to the blind plug 801 fitted to the backup outlet 8 (FIG. 1), Supply piping 115
The sealing material 11 is continuously fed from the injection port 700 in the tail portion that leads to.

FIG. 6 is a developed view of a cylindrical housing body of a valve housing according to a modified embodiment of the present invention, and FIG. 7 is a longitudinal sectional view of a valve body according to this modified embodiment.

As shown in the figure, in this embodiment, 28 discharge ports 3 are opened in the inner peripheral surface of the housing body 201 in the following manner (FIG. 6).

That is, as shown in FIG. 6, the axial direction is the horizontal axis x,
In a developed view when the circumferential direction is the vertical axis y, x
At equal intervals along two imaginary straight lines with an upward slope to the right that rises 180 degrees (half length) on the y-axis per approximately full length of the axis.
14 discharge ports 3 (sequentially 301, 302,...314
), and the vertical axis y of each outlet 3 arranged along one of the imaginary straight lines is the vertical axis y of each outlet 3 arranged along the other imaginary straight line. It's starting to match.

In other words, on the 14 vertical axes y drawn at equal intervals, two discharge ports 3 are arranged vertically with a phase difference of 180 degrees.

On the other hand, as shown in FIG. 7, the valve body 4 in this embodiment has a sealing material supply passage 5 opened in its axial direction, and 14 distribution passages 6 are opened from the supply passage 5.
(Sequentially referred to as 601, 602, . . . 614) are opened on the outer periphery at equal intervals and with the same phase. The distance d between these distribution passages matches the distance d in the x-axis direction between the discharge ports 3 formed in the housing body 201.

Therefore, in this embodiment, this dispensing device 1
into the predetermined position, and insert the sealing material 11 into the valve body 4.
When rotating this while pressurizing and feeding, the sealing material 11 is sequentially pushed out to the 14 discharge ports 3 at a cycle of 180 degrees, and in the same manner as described above, it is pushed out into the gap 23 of the tail seal 22. It is extruded and filled intermittently.

[Effects of the invention] As described above, the present invention exhibits the following excellent effects.

(1) The sealing material can be uniformly supplied to the tail seal portion along its circumferential direction, and the sealing performance of the tail seal portion can be improved as much as possible.

(2) Further, it is possible to automatically and uniformly supply pressure to the tail seal portion along its circumferential direction, thereby increasing workability as much as possible.

(3) It has a simple structure and can be easily used with existing shield excavators, making it highly versatile.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of the main part of the sealing material distribution device of the present invention, Fig. 2 is a sectional view taken along the line shown in Fig. 1, and Fig. 3 is a perspective view of the valve body, which is the main part of the above distribution device. Figure 4 is an explanatory diagram of the arrangement of the distribution passage of the valve body, which is a main part of the above distribution device, Figure 5 is a front view showing the usage state of the same distribution device, and Figure 6 is a modification of the same distribution device. FIG. 7 is a longitudinal cross-sectional view of the valve body in the modified embodiment, FIG. 8 is a side view of the conventional sealant dispensing device in use, and FIG. It is a figure-line sectional view. In the figure, 1 is a distribution device, 2 is a valve housing, 3 is a discharge port, 4 is a valve body, 5 is a supply chamber, 6 is a distribution passage,
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 an injection port from inside the shield machine to the tail seal portion via the tail portion are provided in a predetermined direction in the circumferential direction of the tail seal portion. Alternatively, injection ports are provided at predetermined intervals in the circumferential direction of the inner periphery of the segment and penetrate through the tail seal portion, and a relatively high viscosity is provided from these injection ports to the tail seal portion. A device for filling a sealing material that is pressurized and fed by a pump or the like includes a cylindrical valve housing, and a valve housing provided at a predetermined interval in the longitudinal direction of the valve housing, and a cylindrical valve housing provided at a predetermined interval in the longitudinal direction of the valve housing, and a cylindrical valve housing provided at a predetermined interval in the longitudinal direction of the valve housing, and a cylindrical valve housing provided at a predetermined interval in the longitudinal direction of the valve housing. a discharge port for discharging a sealing material that communicates with the valve; a rod-shaped valve body that rotates in sliding contact with the inner circumferential wall of the valve body in the valve housing to open and close the discharge port;
a sealing material supply chamber located at least on the opposite side of the discharge port and formed along the longitudinal direction within the valve housing for guiding the pressurized and fed sealing material into the valve body; and the valve body. The supply chamber and the discharge port are selectively connected to each other when the valve body is rotated and is penetrated in a radial direction to cross the valve body, and is formed with angle differences sequentially along the longitudinal direction of the valve body. 1. A sealing material distributing device comprising: a distribution passage communicated with each other to open a discharge port and distribute the sealing material; and a valve element driving means for rotating the valve element.