CN1270106C - Differential pressure triggering type reversing control method for hydraulic oil cylinder - Google Patents
Differential pressure triggering type reversing control method for hydraulic oil cylinder Download PDFInfo
- Publication number
- CN1270106C CN1270106C CN 200310110579 CN200310110579A CN1270106C CN 1270106 C CN1270106 C CN 1270106C CN 200310110579 CN200310110579 CN 200310110579 CN 200310110579 A CN200310110579 A CN 200310110579A CN 1270106 C CN1270106 C CN 1270106C
- Authority
- CN
- China
- Prior art keywords
- oil cylinder
- differential pressure
- pressure
- present
- signal
- 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 - Fee Related
Links
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
- Actuator (AREA)
Abstract
The present invention relates to a differential pressure triggering type reversing control method for a hydraulic oil cylinder, which is characterized in that a piston reversing position at one end part of an oil cylinder barrel is provided with a signal hole, an outlet of the oil cylinder is provided with another signal hole, and the pressure of two signal holes are simultaneously introduced in a differential pressure sensor. Since a differential pressure induction element of the present invention is sensitive, the present invention can send messages exactly as long as the two signal holes are separated by a piston, and the differential pressure induction element can carry out comparison as long as pressure signals are introduced. The present invention does not like a hydraulic pressure valve which only can send the messages by liquid flow passing through the valve, and thus, the power loss is decreased. Moreover, since the present invention has no requirement for the liquid flow, the signal holes can be small, and the making difficulty of the oil cylinder is not increased. Pressure signals can be led out of a pipeline so as to cause an installation mode to be flexible.
Description
Technical field
The present invention relates to a kind of hydraulic jack reverse control method.
Background technique
At present, the commutation control mode of master cylinder mainly contains two kinds in machinery such as concrete pumping: a kind of is the electric control reversing of using near switch control; Another kind is the all-hydraulic commutation with hydrovalve control.
Near switch control commutation is to utilize the stroke that detects the oil cylinder piston bar near switch, to be installed in the position that oil cylinder stroke is ended near switch, in case oil cylinder advances to the position of end of a period, near switch connection, provide an electrical signal, automatical control system is controlled the commutation of oil cylinder according to this electrical signal.Owing to must detect piston rod or position of piston near switch, so near switch or be contained in the water tank, or be contained on the cylinder tube.Be contained in the water tank very high, and easily looseningly cause damage near the requirement of switch security level.If be contained on the oil cylinder, must on oil cylinder, open the bigger hole of a diameter (greater than near the switch diameter), increased the manufacture difficulty of oil cylinder greatly.And influence life-span of oil cylinder.
Hydrovalve control commutation only need be on cylinder tube the relevant position open an aperture and draw hydraulic oil, open control valve by the pressure reduction of 2 of oil cylinders, export the pressure signal that commutates.Its shortcoming is hydraulic oil to be flowed requirement is arranged and can't communicate by letter with automatical control system.
Summary of the invention
Technical problem to be solved by this invention is the shortcoming that overcomes prior art, and a kind of pressure reduction trigger type hydraulic jack reverse control method that utilizes the stroke that the pressure reduction sense cell detects oil cylinder is provided.
Technological scheme of the present invention is as follows: need the piston commutation position to open a telltale hole in the end of cylinder tube, open another telltale hole in the oil cylinder outlet port, the pressure of aforementioned two telltale holes is introduced differential pressure pickup simultaneously, differential pressure pickup can be sensed this differential pressure, convert this pressure difference signal to electrical signal simultaneously and give control system, control system is according to the control that commutates of this signal.
Among the present invention because the pressure reduction sense cell is very sensitive, so as long as piston separates two telltale holes just and can accurately post a letter, as long as and the pressure reduction sense cell has pressure signal to introduce just to make comparisons, just can post a letter by valve and need there be liquid to flow unlike hydrovalve, thereby reduce power loss.And because not to the requirement of liquid stream, telltale hole can be done very for a short time, does not increase the oil cylinder manufacture difficulty.Pressure signal can be drawn by pipeline, makes mounting type very flexible.
Description of drawings
Fig. 1 is explanation the inventive method working principle, and oil cylinder is 1 schematic representation in the position.
Fig. 2 is explanation the inventive method working principle, and oil cylinder is 2 schematic representation in the position.
Embodiment
Referring to accompanying drawing 1,2, pressure reduction trigger type hydraulic jack reverse control method of the present invention is: need the piston commutation position to open a telltale hole 1 in the end of cylinder tube 4, open another telltale hole 2 in the oil cylinder outlet port, the pressure at telltale hole 1 place and the pressure of oil cylinder outlet port telltale hole 2 are introduced differential pressure pickup 3 simultaneously.Among the present invention when oil cylinder piston 5 operation also is less than telltale hole 1, telltale hole 1 is communicated with by cylinder tube 4 with 2, the pressure at two places identical (as shown in Figure 1), when the piston operation surpasses telltale hole 1, telltale hole 1 is separated (as shown in Figure 2) with telltale hole 2 by piston, because the pressure at piston two ends is inconsistent, so the pressure at two telltale hole places is inconsistent, differential pressure pickup 3 can be sensed this differential pressure, converts this pressure difference signal to electrical signal simultaneously and gives control system.Control system is according to the control that commutates of this signal.
Claims (1)
1. pressure reduction trigger type hydraulic jack reverse control method, it is characterized in that: need the piston commutation position to open a telltale hole in the end of cylinder tube, open another telltale hole in the oil cylinder outlet port, the pressure of aforementioned two telltale holes is introduced differential pressure pickup simultaneously, differential pressure pickup can be sensed this differential pressure, convert this pressure difference signal to electrical signal simultaneously and give control system, control system is according to the control that commutates of this signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110579 CN1270106C (en) | 2003-11-28 | 2003-11-28 | Differential pressure triggering type reversing control method for hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110579 CN1270106C (en) | 2003-11-28 | 2003-11-28 | Differential pressure triggering type reversing control method for hydraulic oil cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1546877A CN1546877A (en) | 2004-11-17 |
| CN1270106C true CN1270106C (en) | 2006-08-16 |
Family
ID=34335672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310110579 Expired - Fee Related CN1270106C (en) | 2003-11-28 | 2003-11-28 | Differential pressure triggering type reversing control method for hydraulic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1270106C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105775773A (en) * | 2016-04-15 | 2016-07-20 | 徐州徐工施维英机械有限公司 | Carriage operation control method and control device |
-
2003
- 2003-11-28 CN CN 200310110579 patent/CN1270106C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1546877A (en) | 2004-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101785939B (en) | Differential pressure adjustable automatic backwashing filter | |
| CN1198061C (en) | Telescopic system with multiple telescopic cylinders | |
| CN1270106C (en) | Differential pressure triggering type reversing control method for hydraulic oil cylinder | |
| CN107585150A (en) | pressure regulator for ABS system | |
| CN1206464C (en) | Hydraulic oil cylinder with differential pressure triggering reversing control structure | |
| CN102221101A (en) | Spool position detection feedback type bus-mastering electromagnetic container valve | |
| CN1973969A (en) | External pressed film assembly with double water outlet end | |
| CN1170065C (en) | Telescopic system with single telescopic cylinder | |
| CN208294777U (en) | The current stabilization pump assembly of intelligent self priming pump | |
| CN2665430Y (en) | Hydraulic oil cylinder with pressure differential triggering changing-over control structure | |
| CN202117628U (en) | Liquid flow diversion valve | |
| CN201251373Y (en) | Automobile condenser assembly | |
| CN102644317B (en) | Waste water hoisting facility | |
| CN111964831B (en) | Numerical control valve for detecting fluid hydraulic pressure | |
| CN208997051U (en) | A kind of plug support frame quick pressure releasing control loop | |
| CN200964959Y (en) | Improved water pump control device | |
| CN209586842U (en) | A kind of reciprocal cylinder body of integrated self-commutation of no external control device | |
| CN2646504Y (en) | Foreign matter block preventing by-pass valve | |
| CN216812101U (en) | Diaphragm pump head cover with pressure gas tank and diaphragm pump head | |
| CN2763517Y (en) | Reversing valve with working pressure of 31.5 MPa | |
| CN204357808U (en) | A kind of garbage compression vehicle hydraulic lift | |
| CN216842160U (en) | Pumping system pressure reversing device and pump truck | |
| CN2371055Y (en) | Tyre alarm | |
| CN214196803U (en) | Hydraulic system of thickener | |
| CN214008177U (en) | Novel flow induction device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060816 Termination date: 20161128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |