JPH082236Y2 - Sealing agent supply device for shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a sealant supplying device for supplying a sealant such as grease to a seal portion of a shield body with a ground in a shield machine.

2. Description of the Related Art In a shield machine, the portion where the shield body contacts the ground is sealed at the tail seal part on the outer periphery of the rear end of the shield body, or divided into the front body and the rear body, and flexibly connected. There is a seal part in the bent part of the main body of the shield machine. For example, in the case of a tail seal part, as shown in FIG. 3, the mortar pouring grout hole 32 formed in the assembled segment 31 is used to attach the skin seal to the skin plate 34 of the shield body 33 so that the tip end is segmented. 31
Sealing space between a plurality of annular sealing members 35 that are in sliding contact with the outer peripheral surface
A sealing oil, for example, grease 37, was manually injected into 36 at the appropriate time. However, the manual injection is extremely inefficient because the leakage is checked visually, and the injection timing is not constant. Therefore, the skin plate of the shield body 33
The grease supply pipe 38 is connected to the 34 side to supply the grease 37 to the seal space 36.

However, when piping inside the skin plate 34 of the shield body 33, the diameter of the grease supply pipe 38 is limited and becomes small, and the pressure loss is extremely large and the grease flow is poor, which may cause clogging. Often gathered.

An object of the present invention is to solve the above problems and to provide a sealant supply device for a shield machine, which can efficiently supply sealing oil and fat with a small pressure loss even if the diameter of the supply pipe is small.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is directed to a seal portion between a replenishing tank for a sealing oil and fat, a shield body and a ground.
An oil and fat supply pipe in which an oil and fat supply pump is interposed is connected, and an oil and fat heating device is provided at an inlet or an outlet of the oil and fat supply pump.

Action According to the above configuration, the sealing fat and oil supplied from the replenishment tank to the seal portion by the supply pump is heated by the fat and oil heating device, so that the fluidity is improved and the pressure loss is reduced. Even if the diameter of the supply pipe is small, it will not be clogged and the power of the pump will be small. Further, the sealing oil and fat filled in the sealing portion is cooled and solidified by the groundwater in the natural ground, and the sealing property is improved.

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

Reference numeral 1 is a skin plate of the shield main body, and a ring-shaped sealing material 3 whose front end slides on the outer peripheral surface of a segment 2 assembled in the shield main body is fixed on the inner peripheral surface of the rear end tail seal portion A in the front-rear direction. It is installed at intervals. In the seal space 4 between the seal members 3, a plurality of grease supply pipes 5 for filling grease (an example of oil and fat for sealing) to prevent water leakage are connected at regular intervals in the circumferential direction. 5 is a skin plate 12
It is piped inside.

6 is a main supply pipe connected to the grease replenishment tank 7,
A transfer pump 8 is provided on the way, and the tip portion is branched into a plurality (three directions in the drawing) and connected to the pressure feed pumps 9A to 9C, respectively. Reference numeral 10 is an on-off valve interposed in the main supply pipe 7 near the outlet of the replenishment tank 7, and an on-off valve interposed in the main supply pipe 7 near the inlets 11A to 11B of the pumps 9A to 9C. Pump for each pressure feeding
The outlets 9A to 9C are branched into two and connected to each grease supply pipe 5 via a grease supply hose 12.

Reference numeral 13 denotes a grease heating device installed in the main supply pipe 7 near the outlet of the transfer pump 8, and the grease heating device 13 may be installed in the main supply pipe 7 near the inlet (a) of the transfer pump 8. Also, it may be installed in the main supply pipe 7 near the inlets (b) of the respective pressure feeding pumps 9A to 9C, or at the outlet (c) of the respective pressure feeding pumps 9A to 9C, or at two or more locations.

In the above configuration, the grease that is the oil for sealing is
It is sent from the replenishment tank to the respective pressure feed pumps 9A to 9C by the transfer pump 8 via the main supply pipe 6, and further the pressure feed pumps 9A to 9C.
The seal space 4 is replenished and filled from 9C through the grease supply hose 12 and the grease supply pipe 5. At this time, the grease is heated to 30 ° C. or more by the grease heating device 13, so that the fluidity is extremely improved and the pressure loss in each of the pipelines 6, 12, 5 and the pumps 8, 9A to 9C is reduced. . Therefore, even if the pipes 6, 12, 5 have a small diameter, they will not be clogged and the power of the pumps 8, 9A to 9C will be small. The grease filled in the seal space 4 is cooled to 15 ° C. or less by the ground water from the natural ground and solidifies, and the sealing property is improved.

FIG. 2 shows a bent portion seal portion B in a bent type shield machine.

This is in sliding contact with the inner peripheral surface of the rear end of the skin plate 22 of the front body 21 and the outer peripheral surface of the seal cylinder 24 protruding from the front end of the rear body 23.
A ring-shaped seal body 25 is attached at regular intervals in the front-rear direction, and a grease supply pipe is installed in the seal space 26 between the seal bodies 25.
The grease supply pipe 27 is configured to be filled and replenished with grease, and each supply device component having the same configuration as in FIG. 1 is connected to the grease supply pipe 27, and the same effect is obtained.

As described above, according to the present invention, the sealing oil supplied from the replenishment tank to the seal portion by the supply pump is heated by the oil heating device, so that the fluidity is improved. Pressure loss is reduced, the oil supply pipe does not become clogged even when the pipe diameter is small, and the power of the pump can be small. Further, the sealing oil and fat filled in the sealing portion is cooled by the groundwater of the natural ground and solidified to improve the sealing property.

[Brief description of drawings]

FIG. 1 is a block diagram showing a sealant supply device for a tail seal portion of the present invention, FIG. 2 is a vertical sectional view showing a seal portion of a shield excavator bending portion, and FIG. 3 is a vertical section showing a conventional tail seal portion. It is a side view. A ... Tail seal part, 1 ... Skin plate, 2 ... Segment, 3 ... Seal material, 4 ... Seal space, 5 ... Grease supply pipe, 6 ... Main supply pipe, 7 ... Grease replenishment tank, 8 ... Transfer pump, 9A ... 9C ... Pressure pump, 12 ... Grease supply hose, 13 ... Grease heating device, B ... Bend seal part, 25 ...
Seal body, 26 ... Seal space, 27 ... Grease supply pipe.

Claims (1)

[Scope of utility model registration request] 1. An oil / fat supply pipe, in which an oil / fat supply pump is interposed, is connected from a sealing oil / fat replenishment tank to a seal portion between a shield body and a ground, and an oil / fat is provided at an inlet or an outlet of the oil / fat supply pump. A sealant supply device for a shield machine, comprising a heating device.