JPH0484768U

JPH0484768U -

Info

Publication number: JPH0484768U
Application number: JP12848490U
Authority: JP
Priority date: 1990-11-30
Filing date: 1990-11-30
Publication date: 1992-07-23
Anticipated expiration: 2004-02-16
Also published as: JPH066232Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例に係わるコンクリート
ポンプの流路切換バルブ装置の縦断面図、第２図
は第１図の−線で切断して視た矢視図、第３
図は揺動時のガイド管、板部材、ウエアプレート
の関係を示す断面説明図、第４図は従来における
コンクリートポンプの流路切換バルブ装置の縦断
面図、第５図は第４図の−線で切断して視た
矢視図、第６図は揺動時のガイド管とウエアプレ
ートの関係を示す断面説明図である。主要な部分の符号の説明、１……コンクリート
ポンプ、２……ホツパ、３……側壁、３Ａ……壁
面、４，５……シリンダ、６……ウエアプレート
、６Ａ……開口面、６Ｂ……縁部、７……揺動管
、８……ウエアリング（一端部）、９……他端部
、１７，１８……ガイド管、１７Ａ，１８Ａ……
排出口、１７Ｂ，１８Ｂ……吸込口、１７Ｃ，１
８Ｃ……縁部、１９……板部材、１９Ａ……当て
面。 Fig. 1 is a vertical cross-sectional view of a flow path switching valve device for a concrete pump according to an embodiment of the present invention, Fig. 2 is a view taken along the - line in Fig. 1, and Fig.
The figure is an explanatory cross-sectional view showing the relationship between the guide pipe, plate member, and wear plate during rocking, FIG. 4 is a vertical cross-sectional view of a conventional concrete pump flow path switching valve device, and FIG. FIG. 6 is a cross-sectional explanatory view showing the relationship between the guide tube and the wear plate during rocking. Explanation of symbols of main parts, 1... Concrete pump, 2... Hopper, 3... Side wall, 3A... Wall surface, 4, 5... Cylinder, 6... Wear plate, 6A... Opening surface, 6B... ... Edge, 7 ... Swing tube, 8 ... Wear ring (one end), 9 ... Other end, 17, 18 ... Guide tube, 17A, 18A ...
Exhaust port, 17B, 18B... Suction port, 17C, 1
8C...Edge, 19...Plate member, 19A...Abutment surface.

Claims

[Scope of utility model registration request]

A hopper into which fresh concrete is poured, and a pair of cylinders that are provided on one side wall of the hopper and communicate with the inside of the hopper by having an open end opening on the open surface of a wear plate that is fixed to the wall surface of the side wall. and one end is arranged so as to communicate with either of the open ends of both cylinders, and the other end is communicated with a feed pipe provided on the other side wall of the hopper, so that the other end is inserted into the hopper. The swing tube is installed so that it can swing freely around the hopper, and the discharge port at one end faces the opening surface of the wear plate, and the suction port at the other end faces upward in the hopper. A pair of guide tubes whose outer surfaces are exposed inside the hopper and are fixed integrally on the left and right sides of the swing tube, and when one end of the swing tube communicates with the open end of one cylinder, the open end of the other cylinder. When the discharge port of the guide tube on one side communicates with the open end of the other cylinder, and the discharge port of the guide tube on the other side communicates with the open end of the other cylinder. In the flow path switching valve device for a concrete pump, the flow path switching valve device for a concrete pump is provided with a drive means for swinging the swing tube and the pair of guide tubes around the other end of the swing tube so that the swing tubes communicate with each other. Adjacently, a plate member having a contact surface formed at the same height as the opening surface of the wear plate is placed from the wall surface of one side wall over a range that covers the locus area of the discharge port of each guide tube during rocking. A flow path switching valve device for a concrete pump, characterized in that the flow path switching valve device for a concrete pump is mounted on the wall surface of the side wall so that the edge of the discharge port of the guide tube is positioned at least on the abutment surface when the guide tube slides.