JPH038669U - - Google Patents
Info
- Publication number
- JPH038669U JPH038669U JP6907489U JP6907489U JPH038669U JP H038669 U JPH038669 U JP H038669U JP 6907489 U JP6907489 U JP 6907489U JP 6907489 U JP6907489 U JP 6907489U JP H038669 U JPH038669 U JP H038669U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- drive section
- pressure pump
- piping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Reciprocating Pumps (AREA)
Description
第１図は本考案の一実施例の系統図、第２図は
従来の圧送ポンプの系統図である。
１……脱水ケーキ圧送ポンプ、１ａ，１ｂ……
圧送ポンプ、２ａ，２ｂ……ピストン、３ａ，３
ｂ……吸込バルブ、４ａ，４ｂ……吐出バルブ、
５……油圧ポンプ、６……正逆切替手動操作弁、
７……主ピストン切替操作弁、８……バルブ切替
操作弁、９ａ，９ｂ……操作弁、１０ａ，１０ｂ
，１０ｃ，１０ｄ……可変絞り付チエエツク弁、
１１ａ，１１ｂ……アンロード弁、１２ａ，１２
ｂ……アンロード弁、１３ａ，１３ｂ，１３ｃ，
１３ｄ，１３ｅ，１３ｆ……パイロツト弁チエツ
ク弁、１４ａ，１４ｂ，１４ｃ，１４ｄ，１４ｅ
，１４ｆ……チエツク弁、１５ａ，１５ｂ……可
変絞り弁。
FIG. 1 is a system diagram of an embodiment of the present invention, and FIG. 2 is a system diagram of a conventional pressure pump. 1... Dehydrated cake pressure pump, 1a, 1b...
Pressure pump, 2a, 2b... Piston, 3a, 3
b...Suction valve, 4a, 4b...Discharge valve,
5...Hydraulic pump, 6...Forward/reverse switching manual operation valve,
7...Main piston switching operation valve, 8...Valve switching operation valve, 9a, 9b...Operation valve, 10a, 10b
, 10c, 10d...check valve with variable throttle,
11a, 11b...unload valve, 12a, 12
b...Unload valve, 13a, 13b, 13c,
13d, 13e, 13f...Pilot valve check valve, 14a, 14b, 14c, 14d, 14e
, 14f...check valve, 15a, 15b...variable throttle valve.
Claims (1)
よび主ピストン切替操作弁の切替えを行う連通し
た油圧回路を有する、一対の圧送ポンプからなる
脱水ケーキ圧送ポンプの油圧制御装置において；
圧送ポンプピストンの移動時におけるバルブ切替
操作弁の押し側スプールに連る配管とその時の戻
り油配管との間に、パイロツト圧を引き側スプー
ルに連る配管から取るアンロード弁を設け；また
、一方の圧送ポンプの吸込バルブの駆動部と他方
の圧送ポンプの吐出バルブの駆動部とに連る配管
にまたがり、パイロツト圧として上記両バルブの
開動作駆動油圧が加わつた時、上記吸込バルブ駆
動部の油排出管と上記吐出バルブの油流入管とを
直列結合する操作弁を設け；さらに、上記吐出バ
ルブの駆動部の開動作終了ピストン位置近傍から
前記主ピストン切替操作弁のスプールへ連るパイ
ロツト圧伝達配管を設けたことを特徴とする脱水
ケーキ圧送ポンプの油圧制御装置。 In a hydraulic control device for a dehydrated cake pressure pump consisting of a pair of pressure pumps, which has a communicating hydraulic circuit for opening and closing a valve, switching a valve switching operation valve, and switching a main piston switching operation valve;
An unload valve is provided between the piping leading to the pushing side spool of the valve switching operation valve and the return oil piping at the time of movement of the pressure pump piston, and taking the pilot pressure from the piping leading to the pulling side spool; The suction valve drive section spans the piping connecting the suction valve drive section of one pressure pump and the discharge valve drive section of the other pressure pump, and when the hydraulic pressure for opening the two valves is applied as pilot pressure, the suction valve drive section an operating valve that connects in series the oil discharge pipe of the discharge valve and the oil inflow pipe of the discharge valve; and a pilot valve that connects the spool of the main piston switching operation valve from the vicinity of the piston position where the opening operation of the drive section of the discharge valve ends. A hydraulic control device for a dehydrated cake pressure pump, characterized by being equipped with pressure transmission piping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6907489U JPH038669U (en) | 1989-06-15 | 1989-06-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6907489U JPH038669U (en) | 1989-06-15 | 1989-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH038669U true JPH038669U (en) | 1991-01-28 |
Family
ID=31604064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6907489U Pending JPH038669U (en) | 1989-06-15 | 1989-06-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH038669U (en) |
-
1989
- 1989-06-15 JP JP6907489U patent/JPH038669U/ja active Pending
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