JPS61198582U

JPS61198582U -

Info

Publication number: JPS61198582U
Application number: JP8243285U
Authority: JP
Priority date: 1985-05-31
Filing date: 1985-05-31
Publication date: 1986-12-11

Description

[Brief explanation of the drawing]

第１図は本考案のコンクリートポンプの実施例
を示す平面図で第２図のＡ矢視図、第２図は第１
図の側面図、第３図は第１油圧弁ブロツクの具体
的構成を示す平面図、第４図は第３図の正面図、
第５図は第１油圧弁ブロツクを取り付けた主油圧
シリンダのヘツドカバー部の側面図、第６図は第
５図の正面図、第７図は第２油圧弁ブロツクの具
体的構成を示す平面図、第８図は第７図の正面図
、第９図はコンクリートポンプの油圧回路図、第
１０図は従来のコンクリートポンプと油圧弁装置
の設置例を示す斜視図である。１，２は主油圧シリンダ、３は弁駆動シリンダ
、４，１０はポンプ、５ａ，１１ａは圧油ライン
、５ｂ，１１ｂは戻りライン、６，１２は四方弁
、９は安全弁、１４はアキユムレータ、１７，１
８はパイロツト切換弁、１９は電磁切換弁、２０
ａ，２０ｂはパイロツト回路、２１はブースト弁
、２２，２３は逆転弁、２８は密封回路、４８は
ヘツドカバー、５０，５１は流路、５２はロツド
カバーを示す。 Figure 1 is a plan view showing an embodiment of the concrete pump of the present invention, and is a view taken in the direction of arrow A in Figure 2;
3 is a plan view showing the specific configuration of the first hydraulic valve block, FIG. 4 is a front view of FIG. 3,
Fig. 5 is a side view of the head cover portion of the main hydraulic cylinder to which the first hydraulic valve block is attached, Fig. 6 is a front view of Fig. 5, and Fig. 7 is a plan view showing the specific configuration of the second hydraulic valve block. , FIG. 8 is a front view of FIG. 7, FIG. 9 is a hydraulic circuit diagram of a concrete pump, and FIG. 10 is a perspective view showing an installation example of a conventional concrete pump and hydraulic valve device. 1 and 2 are main hydraulic cylinders, 3 is a valve drive cylinder, 4 and 10 are pumps, 5a and 11a are pressure oil lines, 5b and 11b are return lines, 6 and 12 are four-way valves, 9 is a safety valve, 14 is an accumulator, 17,1
8 is a pilot switching valve, 19 is a solenoid switching valve, 20
21 is a boost valve, 22 and 23 are reversing valves, 28 is a sealed circuit, 48 is a head cover, 50 and 51 are flow passages, and 52 is a rod cover.

Claims

[Scope of utility model registration request]

The hydraulic circuit of the concrete pump is divided into the main hydraulic cylinder operation side and the valve drive cylinder operation side, and the former side has a four-way valve and a safety valve integrated into a first hydraulic valve block, and the latter side has a four-way valve, a boost valve, and a safety valve.
The unload valve, reversing valve, etc. are combined into a second hydraulic valve block, and the head cover of the main hydraulic cylinder is integrally formed and the first hydraulic valve block is attached thereon. A hydraulic drive characterized in that the hydraulic cylinder is communicated with the main hydraulic cylinder through a flow path in the head cover, a second hydraulic valve block is attached to the rod side of the main hydraulic cylinder, and the two hydraulic valve blocks are connected by appropriate piping. type concrete pump.