CN208595109U - A kind of oil cylinder overflow valve differential speed accelerating circuits - Google Patents
A kind of oil cylinder overflow valve differential speed accelerating circuits Download PDFInfo
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- CN208595109U CN208595109U CN201821226948.9U CN201821226948U CN208595109U CN 208595109 U CN208595109 U CN 208595109U CN 201821226948 U CN201821226948 U CN 201821226948U CN 208595109 U CN208595109 U CN 208595109U
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- valve
- oil cylinder
- oil
- rodless cavity
- overflow valve
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- 241000009298 Trigla lyra Species 0.000 claims description 10
- 239000012530 fluid Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 59
- 239000010720 hydraulic oil Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model discloses a kind of oil cylinder overflow valve differential speed accelerating circuits, including three-position four-way electromagnetic directional valve, check valve, sequence valve, overflow valve, oil cylinder, two-bit triplet solenoid directional control valve.According under same pressure, utilize the difference in areas of oil cylinder rodless cavity and rod chamber, generate pressure difference, to which drive cylinder is stretched out, oil cylinder is linked up into and out of hydraulic fluid port by overflow valve, the oil of rod chamber is made to have returned to rodless cavity, it is more much bigger to the oil mass of rodless cavity than depending merely on oil pump feed, to obtain oil cylinder quick acting, realize small flow at high speed.When oil cylinder piston is moved toward rodless cavity, only needs two-bit triplet solenoid directional control valve to obtain electric, oil cylinder rodless cavity and rod chamber are disconnected.The utility model makes hydraulic system under conditions of not increasing accumulator and hydraulic pump capacity and power, can effectively realize that oil cylinder quickly moves.It is practical suitable for high-pressure low-flow system, to reduce hydraulic system volume, compact-sized, safe and reliable, raising hydraulic system efficiency.
Description
Technical field
The utility model relates to Hydraulic Adjustable Speed control technology fields, specifically provide a kind of oil cylinder overflow valve differential speed accelerating time
Road.
Background technique
It is known that: the movement velocity of oil cylinder is obtained by following formula:
V=Q/A (1)
In formula:
V-oil cylinder movement velocity；
Q-enters the flow of cylinder rod chamber or rodless cavity；
The area of A-cylinder rod chamber or rodless cavity piston；
It can be seen from above formula in the certain situation of piston area, the movement velocity V of oil cylinder has bar with into oil cylinder
The flow Q of chamber or rodless cavity is directly proportional, it may be assumed that speed V depends on flow Q.
In addition, if needing big flow Q within a very short time, must just increase accumulator, Huo Zhexuan in hydraulic system
The hydraulic pump of big flow also needs to increase the laying of fluid pressure line with high power motor, increases the volume of fuel tank, increase hydraulic
Stage space.
In addition, the increase of hydraulic services certainly will increase the leakage point of hydraulic system, and external leakage just refers to generation in liquid
Between pressure system and external environment, hydraulic oil is directly leaked to external environment, and hydraulic oil generates loss, simultaneously, it is easy to cause
The pollution of hydraulic oil, increases production cost indirectly.
In addition, the leakage point of hydraulic system is more, working environment is not only influenced, can more seriously make hydraulic system pressure
Not enough cause to generate failure, or even be also possible to that the danger of fire occurs because of the hydraulic oil of leakage, to energy-saving and environmental protection, peace
The all various aspects of congruence all have an adverse effect.
In addition, the hydraulic pump structure of big flow is complicated, material and requirement on machining accuracy height, price, to the clear of hydraulic oil
Cleanliness requires high.Assemble relatively difficult, working service is stringenter.It breaks down and is not easy to check and exclude, influence hydraulic system
The reliability of work.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of oil cylinder overflow valve differential speed accelerating circuits, with solution
Certainly executing agency's cylinder movement speed is slow in the prior art, realizes small flow at high speed.
The utility model is realized in this way a kind of oil cylinder overflow valve differential speed accelerating circuits, including 3-position 4-way electromagnetism change
To valve, 3 check valves, sequence valve, overflow valve and two-bit triplet solenoid directional control valve, wherein three-position four-way electromagnetic directional valve has two
A port is connected on oil inlet pipe and oil return line, other two port the rodless cavity of piping connection oil cylinder and has bar respectively
Chamber is equipped with check valve A, the pipeline where check valve A on the pipeline that three-position four-way electromagnetic directional valve is connect with cylinder rod chamber
Section is equipped with branch circuit, sets sequence valve in branch circuit, and check valve B is additionally provided in branch circuit, and overflow valve passes through pipeline and three
Four-way electromagnetic reversing valve is connect with parallel way with rod chamber and rodless cavity, and check valve C is set in the line segments where overflow valve；
Two ports of two-bit triplet solenoid directional control valve are connected on oil inlet pipe and oil outlet pipe by control piper, and
Another port is connect with the drain tap of the overflow valve by control piper, and the drain tap and oil return line of sequence valve pass through control
Piping connection processed, the other end of sequence valve are connected to the pipe between three-position four-way electromagnetic directional valve and rodless cavity by control piper
On the road.
Further, the system pressure in entire circuit is 280bar, and the pressure setting of the overflow valve is 70bar, described
The pressure that sequence valve is set up is 270bar.
Compared with the prior art, the advantages of the utility model are:
1, from rodless cavity oil inlet, the oil of rod chamber is made to return to rodless cavity.Under same pressure, rodless cavity and rod chamber are utilized
Difference in areas, generate pressure difference, thus driving hydraulic cylinder stretch out.Because the oil of rod chamber has returned to rodless cavity, hydraulic cylinder
It can be acted with fast speed, realize small flow at high speed.
2, overflow valve differential speed accelerating circuits are commonly used in the fast feed occasion of no-load effect.
3, overflow valve differential speed accelerating circuits are to realize that oil cylinder is quickly transported under conditions of not increasing hydraulic pump capacity and power
Dynamic effective way.
4, overflow valve differential speed accelerating circuits do not need increase accumulator quickly drain the oil, just can increase flow system flow.
5, the maximum benefit of overflow valve differential speed accelerating circuits is exactly that cylinder piston rod can obtain faster speed when stretching out,
Even if the flow of pump is smaller, but the power output of at this moment oil cylinder is smaller, is not suitable for heavy duty.
6, for overflow valve differential speed accelerating circuits using the pressure change in hydraulic system, control Hydraulic Elements executes sequence,
Sensitive, mounting arrangements are convenient.
7, overflow valve differential speed accelerating circuits reduce hydraulic system volume, are suitble to high-pressure low-flow system practical.
8, horsepower requirements of the designer according to system, response characteristic, application etc. reasonably select overflow valve differential speed accelerating
Circuit is greatly improved hydraulic system efficiency.
Detailed description of the invention
With reference to the accompanying drawing and embodiment is described in further detail the utility model:
Fig. 1 is the utility model structural schematic diagram；
Fig. 2 is the utility model velocity analysis schematic diagram.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to the accompanying drawing and implement
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is used only for explaining
The utility model is not used to limit the utility model.
With reference to Fig. 1, the utility model provides a kind of oil cylinder overflow valve differential speed accelerating circuits, including three-position four-way electromagnetic directional valve 1,
Check valve A2, check valve B3, check valve C4, sequence valve 5, overflow valve 6 and two-bit triplet solenoid directional control valve 7, wherein 3-position 4-way
Solenoid directional control valve 1 is connected on oil inlet pipe and oil return line there are two port respectively, and three-position four-way electromagnetic directional valve 1 is in addition
The rodless cavity and rod chamber of two port difference piping connection oil cylinders 8, in three-position four-way electromagnetic directional valve 1 and 8 rod chamber of oil cylinder
The pipeline of connection is equipped with check valve A2, and the line segments where check valve A2 are equipped with branch circuit, sets sequence valve 5 in branch circuit,
And check valve B3 is additionally provided in branch circuit, overflow valve 6 with parallel way and has bar by pipeline and three-position four-way electromagnetic directional valve 1
Chamber is connected with rodless cavity, and sets check valve C4 in the line segments where overflow valve 6；
Two ports of two-bit triplet solenoid directional control valve 7 are connected on oil inlet pipe and oil outlet pipe by control piper,
And another port is connect with the drain tap of the overflow valve 6 by control piper, the drain tap and oil return line of sequence valve 5 are logical
Cross control piper connection, the other end of sequence valve 5 by control piper be connected to three-position four-way electromagnetic directional valve 1 and rodless cavity it
Between pipeline on.
The system pressure in entire circuit is 280bar, and the pressure setting of the overflow valve 6 is 70bar, and the sequence valve 5 is adjusted
Fixed pressure is 270bar.
The utility model, using the difference in areas of oil cylinder rodless cavity and rod chamber, generates pressure difference according under same pressure,
To which drive cylinder is stretched out, oil cylinder is linked up into and out of hydraulic fluid port by overflow valve 6, the oil of rod chamber is made to have returned to rodless cavity,
It is more much bigger to the oil mass of rodless cavity than depending merely on oil pump feed, to obtain 8 quick acting of oil cylinder, realize small flow at high speed.When
When 8 piston of oil cylinder is moved toward rodless cavity, only needs two-bit triplet solenoid directional control valve 7 to obtain electric, 8 rodless cavity of oil cylinder and rod chamber are disconnected
?.
It is as shown in Figure 2: when differential connection, set respectively:
The speed that V-oil cylinder piston moves right；
A1- oil cylinder rodless cavity piston area；
A2- cylinder rod chamber piston area；
Q-enters the oil liquid flow of oil cylinder rodless cavity；
Q1The oil liquid flow of-cylinder rod chamber discharge；
Then have:
Q1=A2V (2)
Q1Rodless cavity is flowed into together with the flow Q of hydraulic pump supply, into the total flow of rodless cavity are as follows:
Q+Q1=Q+A2V=A1V (3)
Simplification arranges:
If not when differential connection,
Obtain (4) > (5), it may be assumed that A2Bigger, oil cylinder differential velocity V is bigger.
When in use, system pressure 280bar, 6 set pressure of overflow valve are 70bar, and 5 set pressure of sequence valve is
270bar.When the electromagnet b of three-position four-way electromagnetic directional valve 1 obtains electric, pressure oil enters by three-position four-way electromagnetic directional valve 1
The piston rod of the rodless cavity of oil cylinder 8, oil cylinder 8 moves right.When the rod chamber pressure rise of oil cylinder 8 is to 70bar, overflow valve 6 is opened
It opens, pressure oil flows into rodless cavity by overflow valve 6 and check valve C4, to obtain 8 quick acting of oil cylinder.
When the piston rod movement of oil cylinder 8 is to terminal, when the rodless cavity pressure rise of oil cylinder 8 is to 270bar, sequence valve 5 is opened
It opens, the rodless cavity of oil cylinder 8 is logical by sequence valve 5, check valve B3, three-position four-way electromagnetic directional valve 1 and oil return T-phase, to guarantee oil
The rod chamber of cylinder 8 does not generate back pressure.
As the electromagnet a of the three-position four-way electromagnetic directional valve 1 and electromagnet c of two-bit triplet solenoid directional control valve 7 while obtaining electric
When, pressure oil blocks the drain tap of overflow valve 6 by two-bit triplet solenoid directional control valve 7, prevents it from opening, while pressure oil
Enter the rod chamber of oil cylinder 8 by three-position four-way electromagnetic directional valve 1, check valve A2, the rodless cavity of oil cylinder 8 is by 3-position 4-way electricity
Magnetic reversal valve 1 and oil return T-phase are logical, so that the piston rod of oil cylinder 8 be made to move downward.
Application mode of the 6 differential speed accelerating principle of overflow valve in hydraulic system be it is various, when in use, the setting of each valve
Pressure must be reasonably selected according to specific actual conditions, proper use of.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (2)
1. a kind of oil cylinder overflow valve differential speed accelerating circuits, which is characterized in that including three-position four-way electromagnetic directional valve, 3 check valves,
Sequence valve, overflow valve and two-bit triplet solenoid directional control valve, wherein three-position four-way electromagnetic directional valve is connected to oil inlet there are two port
On pipeline and oil return line, other two port distinguishes the rodless cavity and rod chamber of piping connection oil cylinder, in 3-position 4-way electromagnetism
The pipeline that reversal valve is connect with cylinder rod chamber is equipped with check valve A, and the line segments where check valve A are equipped with branch circuit, branch
Sequence valve is set on circuit, and is additionally provided with check valve B in branch circuit, and overflow valve is by pipeline and three-position four-way electromagnetic directional valve with simultaneously
Connection mode is connect with rod chamber and rodless cavity, and check valve C is set in the line segments where overflow valve；
Two ports of two-bit triplet solenoid directional control valve are connected on oil inlet pipe and oil outlet pipe by control piper, and another
A port is connect with the drain tap of the overflow valve by control piper, and the drain tap and oil return line of sequence valve pass through control pipe
Road connection, the other end of sequence valve are connected to the pipeline between three-position four-way electromagnetic directional valve and rodless cavity by control piper
On.
2. oil cylinder overflow valve differential speed accelerating circuits described in accordance with the claim 1, which is characterized in that the system pressure in entire circuit
For 280bar, the pressure setting of the overflow valve is 70bar, and the pressure that the sequence valve is set up is 270bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821226948.9U CN208595109U (en) | 2018-08-01 | 2018-08-01 | A kind of oil cylinder overflow valve differential speed accelerating circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821226948.9U CN208595109U (en) | 2018-08-01 | 2018-08-01 | A kind of oil cylinder overflow valve differential speed accelerating circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208595109U true CN208595109U (en) | 2019-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821226948.9U Withdrawn - After Issue CN208595109U (en) | 2018-08-01 | 2018-08-01 | A kind of oil cylinder overflow valve differential speed accelerating circuits |
Country Status (1)
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| CN (1) | CN208595109U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757624A (en) * | 2018-08-01 | 2018-11-06 | 本钢板材股份有限公司 | A kind of oil cylinder overflow valve differential speed accelerating circuits |
-
2018
- 2018-08-01 CN CN201821226948.9U patent/CN208595109U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757624A (en) * | 2018-08-01 | 2018-11-06 | 本钢板材股份有限公司 | A kind of oil cylinder overflow valve differential speed accelerating circuits |
| CN108757624B (en) * | 2018-08-01 | 2023-11-28 | 本钢板材股份有限公司 | Differential speed-increasing circuit of oil cylinder overflow valve |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190312 Effective date of abandoning: 20231128 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190312 Effective date of abandoning: 20231128 |