JPH0422591U

JPH0422591U -

Info

Publication number: JPH0422591U
Application number: JP6019690U
Authority: JP
Priority date: 1990-06-08
Filing date: 1990-06-08
Publication date: 1992-02-25

Description

[Brief explanation of the drawing]

第１図〜第４図は本考案の一実施例図で、第１
図は密閉袋が膨脹した状態を示す掘進機全体の縦
断面図、第２図は第１図の−断面図、第３図
は密閉袋が収縮した状態を示す要部縦断面図、第
４図は第３図の−断面図、第５図は本考案の
他の実施例を示す要部縦断面図および油圧回路図
、第６図は密閉袋を装備していない従来の小口径
掘進機の縦断面図、第７図は土砂圧送ポンプの動
作説明図である。１……地山、２……回転掘削具、２−１……作
泥土材注入口、４−１……前部掘進機本体、４−
２……後部掘進機本体、５……埋設管、７……土
砂圧送ポンプ、７−１……外筒、７−２……土砂
圧送ピストン、７−３……油圧駆動装置、８……
泥土取込口、９……泥土通路、１２……土砂圧送
パイプ、１３……密閉袋、１４……土砂圧送ポン
プの空気室、１５……エア配管、１６……油圧配
管、１７……電磁切換弁、１８……油圧源。 Figures 1 to 4 are illustrations of one embodiment of the present invention.
The figure is a vertical cross-sectional view of the entire excavator with the sealed bag inflated, Figure 2 is a cross-sectional view of Figure 1, Figure 3 is a longitudinal cross-sectional view of the main part showing the sealed bag in the deflated state, and Figure 4 The figure is a sectional view of FIG. 3, FIG. 5 is a vertical sectional view of main parts and a hydraulic circuit diagram showing another embodiment of the present invention, and FIG. 6 is a conventional small-diameter excavator not equipped with a sealed bag. FIG. 7 is an explanatory diagram of the operation of the earth and sand pump. 1... Earth, 2... Rotating excavator, 2-1... Mud material injection port, 4-1... Front excavator main body, 4-
2...Rear excavator main body, 5...Buried pipe, 7...Earth pressure pump, 7-1...Outer cylinder, 7-2...Earth pressure transfer piston, 7-3...Hydraulic drive device, 8...
Mud intake port, 9... Mud passageway, 12... Earth and sand pressure feeding pipe, 13... Airtight bag, 14... Air chamber of earth and sand pressure pump, 15... Air piping, 16... Hydraulic piping, 17... Electromagnetic Switching valve, 18...hydraulic source.

Claims

[Scope of utility model registration request]

A rotary excavator whose outer diameter is larger than the outer diameter of the excavator body is attached to the tip of the excavator body, and this rotary excavator is equipped with an injection port for injecting mud material into the excavated soil. It has an outer cylinder that reciprocates inside and an earth and sand pumping piston that reciprocates within this outer cylinder, and a suction process that takes in mud from the mud intake port by the reciprocating movement of the outer cylinder and the earth and sand pumping piston, and a suction process that takes mud into the outer cylinder. A sand pump is installed that repeats the sealing process to seal the mud and the pumping process to pump the sealed mud to the sand pumping pipe, and the mud is passed from the face side through the mud passage between the outer periphery of the excavator body and the ground. In a small-diameter excavation machine configured to discharge mud transferred to the mud intake port backward by the soil pressure pump, an inflatable and deflated airtight bag is attached to the outer periphery of the excavation machine body near the mud intake port. Each of the sediment displacement pumps is configured such that in the suction process of the sediment displacement pump, the sealed bag is inflated by injecting fluid, and in the sealing process and the pressure feeding process of the sediment displacement pump, the sealed bag is contracted by discharging the fluid. A small-diameter excavator characterized by being equipped with a fluid injection/discharge means that operates in conjunction with the process.