JP2935210B2 - Tail seal grease filling equipment in shield excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tail seal grease filling apparatus for a shield excavator.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional tail seal grease filling apparatus, in which a seal grease A is provided between a front tail brush b and a rear tail brush c mounted on a tail part a of a shield excavator. Is filled. When the temporary segment is assembled, the front and rear tail brushes b and c are pressure-bonded to the segment B as shown in FIG. 5, and seal grease A filled between the tail brushes b and c and the segment B; Water is stopped by seal grease A put in b and c.

[0003]

However, when the shield excavator advances, the seal grease A between the tail brushes b and c adheres to the segment B as indicated by A 'as shown in FIG. The amount of seal grease A decreased with the advancement of the seal grease, and the amount of seal grease A was lost for several rings.

For this reason, during excavation by a shield excavator,
From the grout hole d provided in the segment B, the seal grease is filled again by the grease pump. Only when the positions between the grout hole d and the brushes b and c match, the seal grease can be filled, and the pump is pumped up. Sometimes the excavation had to be interrupted, affecting the process.

The present invention has been proposed in view of the above-mentioned problems of the prior art. The object of the present invention is to make maximum use of the water blocking effect of a tail seal and to use a shield excavator at a site under high water pressure. Another object of the present invention is to provide a tail seal grease filling device in a shield excavator that can maintain the water stopping effect for a long time, check the filling state of the seal grease, and can easily perform refilling of the seal grease at any time.

[0006]

SUMMARY OF THE INVENTION A tail seal grease filling apparatus for a shield excavator according to the present invention is provided for filling a seal grease between a pair of front and rear tail brushes mounted on the tail of a shield excavator. A mesh wire mesh is attached, and a seal grease filling tube communicating with the mesh wire mesh is connected, and a base end portion is provided between the mesh wire mesh and the front tail brush and the rear tail brush in the space between the front and rear tail brushes. Communication,
A front pipe for checking the water stop state and a rear pipe for checking the water stop state, each of which has a tip opening outside the space between the front and rear brushes, are provided.

[0007]

As described above, according to the present invention, a seal is provided between the front and rear tail brushes by a mesh metal mesh for filling the seal grease disposed between the front and rear tail brushes mounted on the tail portion of the shield excavator. Since the grease is hardly wrapped and pushed out, the loss of the seal grease accompanying the excavation of the shield excavator is reduced, and the water stopping effect is maintained for a long time.

Further, the water stopping effect of the seal grease can be confirmed by checking the water stopping condition based on a water pressure difference or the like at an end of the front pipe and the rear pipe for checking the water stopping state which are open to the outside of the space between the front and rear tail brushes. Can be checked, and the filling status of the seal grease can be checked. Thus, when the seal grease is insufficient, the mesh wire mesh of the grease can be filled with the grease at any time through the seal grease filling pipe, so that there is no need to position the grout hole in the segment for filling the seal grease.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Reference numeral 1 denotes a tail portion of a shield excavator, in which a front tail brush 2 and a rear tail brush 3 are mounted on an inner peripheral surface, and a mesh wire mesh 4 for charging a seal grease is pre-installed between the front and rear tail brushes 2, 3. In addition, seal grease filling pipes 5 for the same mesh wire net 4 are disposed at several places, and the seal grease 6 can be arbitrarily filled through end grease filling portions 5a of the pipes 5. I have.

A rear end portion of the mesh wire mesh 4 in the space between the front and rear tail brushes 2 and 3 has a rear end opening, and a front end has a front end opening in the space. Front pipes 8 for checking the water stoppage, which open in front of the mesh wire mesh 4 in the space between the front and rear brushes 2 and 3 and whose front ends open in front of the space, are arranged at several places. 9 is a segment in the figure.

Since the illustrated embodiment is configured as described above, the seal grease 6 is wrapped by the mesh wire mesh 4 and hardly extruded, so that the water stopping effect is maintained. Also, the water stoppage effect of the seal grease 6 is confirmed by the water pressure difference between the front pipe 8 and the rear pipe 7 for checking the water stopping condition, and the seal grease 6 is supplied to the wire mesh 4 via the seal grease filling pipe 5. It is to be filled.

[0012]

According to the present invention, as described above, a seal grease is loaded between a pair of front and rear tail brushes mounted on a tail portion of a shield excavator so that the seal grease is attached to the mesh wire mesh. It is hard to be extruded because it is wrapped in water, and the water stopping effect is maintained for a long time.

A rear end and a front end of the mesh wire mesh in the space between the front and rear tail brushes communicate with each other, and front and rear pipes for confirming a water stop state are provided, each end of which is opened forward of the space. The filling state of the seal grease is confirmed, and the filling of the mesh gauze with the seal grease is replenished by the grease filling tube.

As described above, according to the present invention, the water blocking effect of the tail seal is maintained for a long time at the site under high water pressure by making the most of the water stopping effect of the tail seal, and the filling state of the seal grease can be easily confirmed. It is possible to refill the seal grease at any time.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a tail seal grease filling apparatus in a shield excavator according to the present invention.

FIG. 2 is a longitudinal sectional view showing an operation state of the device of the present invention.

FIG. 3 is a vertical sectional side view of a tail seal portion in a conventional shield excavator.

FIG. 4 is a perspective view of a tail brush.

FIG. 5 is a vertical sectional side view showing an operation state of a conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tail part 2 Front tail brush 3 Rear tail brush 4 Mesh wire mesh 5 Seal grease filling pipe 5a Seal grease filling section 6 Seal grease 7 Rear pipe for checking water stoppage state 8 Front pipe for checking water stoppage state 9 Segment

Claims (1)

(57) [Claims] 1. A shield grease filling mesh wire mesh is mounted between a pair of front and rear tail brushes mounted on the tail portion of a shield excavator, and a seal grease filling pipe communicating with the mesh wire mesh is connected. At the same time, the base end portion communicates between the mesh wire mesh and the front tail brush and the rear tail brush in the space between the front and rear tail brushes, and the water stopping condition check in which the tip ends open outside the space between the front and rear brushes. A tail seal grease filling device for a shield excavator, comprising a front piping for water use and a rear piping for checking a water stop condition.