GB701699A - Improvements in and relating to air-operated hydraulic pumps - Google Patents
Improvements in and relating to air-operated hydraulic pumpsInfo
- Publication number
- GB701699A GB701699A GB3145950A GB3145950A GB701699A GB 701699 A GB701699 A GB 701699A GB 3145950 A GB3145950 A GB 3145950A GB 3145950 A GB3145950 A GB 3145950A GB 701699 A GB701699 A GB 701699A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- air
- cylinder
- pressure
- piston
- 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L25/00—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means
- F01L25/02—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means
- F01L25/04—Drive, or adjustment during the operation, or distribution or expansion valves by non-mechanical means by fluid means by working-fluid of machine or engine, e.g. free-piston machine
- F01L25/06—Arrangements with main and auxiliary valves, at least one of them being fluid-driven
Landscapes
- Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
701,699. Regulating reciprocating pumps. KOMAC, Ltd. Jan. 25, 1952 [Dec. 28, 1950], No. 31459/50. Class 102 (1). In a control unit for controlling an airoperated hydraulic pump having a self-reversing, double-acting, air-operated piston slidable in a cylinder to impart pressure to the hydraulic cylinder of the pump, a change-over valve is adapted selectively to supply the air cylinder either with air at high pressure or with air at low pressure according to the hydraulic pressure produced by the pump. As shown, a changeover valve A, Figs. 1, 3, having high and low pressure air inlets 2, 3 respectively and an outlet connection 4 to the hydraulic cylinder is provided with a slide valve 23 connected by a rod 22 to a piston 21 slidable in a cylinder 20. The piston 21 is controlled by a diaphragmactuated control valve B, Figs. 1, 2. The valve B comprises a two-part casing 13, 14, clamping between its parts a diaphragm 9 carrying a valve member 16 and a plunger 11. In opera- . tion, air at low pressure supplied to the upper side of the diaphragm 9 from a pressure-reducing valve 7 opens the valve 16 to supply low pressure air through a line 28 to the cylinder 20 whence the piston 21 moves the valve 23 upwards to connect the high pressure inlet 2 from the main 6 to the outlet 4 to supply the doubleacting, air-operated piston operating the pump with high pressure air. The hydraulic pump pressure which is rapidly built up is transmitted through a port 34 in the valve B to act on the plunger 11 and when a predetermined hydraulic pressure is reached the diaphragm 9 is moved upwards to close the valve 16. Air in the cylinder 20 is then vented to atmosphere through the line 28 and a' port 5 and the high pressure air acting on the larger upper surface of the valve 23 moves this valve downwards to connect the low pressure inlet 3 to the outlet 4 to slowly continue the pumping operation until the total load on the air-operated piston equals the hydraulic load whence the air-operated piston comes to rest. In a modification, the inlet 3 and outlet 4 are reversed in which case the valve 16 is arranged to close under the action of the low pressure air. In a further modification, the cylinder 20, piston 21, and valve 16 are dispensed with, the diaphragm 9 then being directly connected to the valve 23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3145950A GB701699A (en) | 1950-12-28 | 1950-12-28 | Improvements in and relating to air-operated hydraulic pumps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3145950A GB701699A (en) | 1950-12-28 | 1950-12-28 | Improvements in and relating to air-operated hydraulic pumps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB701699A true GB701699A (en) | 1953-12-30 |
Family
ID=10323393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3145950A Expired GB701699A (en) | 1950-12-28 | 1950-12-28 | Improvements in and relating to air-operated hydraulic pumps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB701699A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359887A (en) * | 2021-06-11 | 2021-09-07 | 华能澜沧江水电股份有限公司 | Ultrahigh-pressure grouting pressure control device and control method |
-
1950
- 1950-12-28 GB GB3145950A patent/GB701699A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113359887A (en) * | 2021-06-11 | 2021-09-07 | 华能澜沧江水电股份有限公司 | Ultrahigh-pressure grouting pressure control device and control method |
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