JPH0169900U

JPH0169900U -

Info

Publication number: JPH0169900U
Application number: JP1987162485U
Authority: JP
Priority date: 1987-10-26
Filing date: 1987-10-26
Publication date: 1989-05-09
Also published as: JPH0412152Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の油圧回路図、第２
図は同電気回路図、第３図は土砂圧送装置の動作
説明図、第４図は第３図Ｓ部の一例を示す拡大図
、第５図は第３図Ｓ部の他の例を示す拡大図であ
る。１……土砂溜タンク、２……土砂圧送ピストン
、３……スライド筒、４……シール、５……圧送
パイプ、７……ピストン用ジヤツキ、８……スラ
イド筒用ジヤツキ、８ａ……スライド筒用ジヤツ
キのボトム側の作動油行戻り流路、１１……スラ
イド筒用ジヤツキの油圧切換弁、１３……パイロ
ツト操作チエツク弁（作動油行戻り流路８ａを全
閉とする手段）、１４……蓄圧器（蓄圧手段）、
２０……土砂取込工程終了を検知するリミツトス
イツチ、ＳＮ……時限リレー（時限動作要素）、
２６，２７……オンデイレー接点。 Figure 1 is a hydraulic circuit diagram of one embodiment of the present invention, Figure 2 is a hydraulic circuit diagram of an embodiment of the present invention.
The figure is the electrical circuit diagram, Figure 3 is an explanatory diagram of the operation of the earth and sand pumping device, Figure 4 is an enlarged view of an example of the S part in Figure 3, and Figure 5 is another example of the S part in Figure 3. It is an enlarged view. 1... Sediment collection tank, 2... Sediment pressure feeding piston, 3... Slide tube, 4... Seal, 5... Pressure feeding pipe, 7... Piston jack, 8... Slide tube jack, 8a... Slide Hydraulic oil line return passage on the bottom side of the cylinder jack, 11... Hydraulic pressure switching valve of the slide cylinder jack, 13... Pilot operation check valve (means for fully closing the hydraulic oil line return passage 8a), 14 ...Pressure accumulator (pressure accumulating means),
20...Limit switch that detects the end of the earth and sand intake process, SN...Timed relay (timed operation element),
26, 27...On-delay contact.

Claims

[Scope of utility model registration request]

a sediment storage tank; a slide tube having an open end and sliding back and forth linearly within the sediment storage tank;
An earth and sand pumping piston that reciprocates in the axial direction of the slide cylinder, a slide cylinder jack that reciprocates the slide cylinder in the axial direction, a piston jack that reciprocates the earth and sand pumping piston in the axial direction, and earth and sand. A pressure feeding pipe connected to a storage tank is provided, the slide cylinder is slid forward to take in earth and sand into the slide cylinder, the inside of the slide cylinder and the inside of the sediment storage tank are sealed and isolated, and the earth and sand pressure piston is slid forward. In an earth and sand pumping device that pushes out earth and sand in a slide cylinder and pumps it into a pressure pipe, a means is provided for completely closing a hydraulic oil return passage on the bottom side of a slide cylinder jack when the slide cylinder jack stops operating. A pressure accumulating means is provided in the hydraulic oil line return flow path, and after the limit switch is activated to detect the end of the earth and sand intake process, the hydraulic switching valve of the slide cylinder jack controls the flow of hydraulic oil to the bottom side of the slide cylinder jack. A timed operation element is provided to provide a sufficient time delay for pressure to accumulate in the pressure accumulating means before the supply is stopped, and a force is applied to the slide cylinder jack to counter the push-back force exerted on the tip of the slide cylinder by the pumping load during the earth and sand pumping process. An earth and sand pumping device characterized by generating hydraulic pressure.