CN207750314U - A kind of detection and loop protection system for hydraulic oil pollution - Google Patents
A kind of detection and loop protection system for hydraulic oil pollution Download PDFInfo
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- CN207750314U CN207750314U CN201721901017.XU CN201721901017U CN207750314U CN 207750314 U CN207750314 U CN 207750314U CN 201721901017 U CN201721901017 U CN 201721901017U CN 207750314 U CN207750314 U CN 207750314U
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- detection device
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- control valve
- directional control
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Abstract
The utility model discloses a kind of detections for hydraulic oil pollution and loop protection system; the utility model is provided with the protective loop for the prevention work system failure constituted including two detection devices and manual solenoid directional control valve; two detecting systems are associated with the manual solenoid directional control valve in system oil-way; with treated, the control of detection device output current signal determines the manual solenoid directional control valve of oil circuit break-make; once contamination level of oil liquid is excessively high; solenoid directional control valve is closed, and system oil-way will stop work.This system reaction time is short, and oil circuit interrupts thorough, the phenomenon that having prevented machine " the dirty operation of band " from the root cause.The utility model is provided with solid pollutant detection device and fluid contaminants detection device, can be detected simultaneously to solid contaminant present in fluid and fluid contaminants.
Description
Technical field
The utility model belongs to Hydraulic Field, and in particular to a kind of detection and loop protection system for hydraulic oil pollution
System.
Background technology
Hydraulic technique is easy to implement automation because its transmission device is small, light-weight, compact-sized, fast response time,
The advantages that stepless speed regulation range is big is widely used in the industrial circles such as Aeronautics and Astronautics, navigation, national defence, military affairs and steel, mine.
And in hydraulic technique development process, contamination control problem annoyings vast hydraulic pressure scientific worker always.Existing research money
Material and achievement show the pollution due to hydraulic oil and caused by failure account for 80% or more of hydraulic fault.
With the development of hydraulic industry, modern hydraulic systems become to become increasingly complex, accurate and high-performance, while to hydraulic pressure
The cleannes of fluid require also higher and higher.Therefore it develops and a kind of oil contamination situation is quickly and effectively detected and controlled
Technology is extremely urgent.Pollutant in fluid can be divided into solid-state, liquid and gaseous state three types according to its physical state.Solid-state is dirty
Dye object is usually present in graininess in system；Fluid contaminants are mainly the water of extraneous invasive system.These pollutants pair
The infringement of fluid is all-pervasive, at every moment occurs.In a short time its can't severe jamming hydraulic system normal work, it is past
It is past to be ignored by people, and when the accumulation of pollutant long-term " warm water boils frog " causes system that apparent failure occurs, when being
It is late.The breakdown maintenance of engineering machinery is at high price, time-consuming and laborious.It is therefore desirable to one is arranged in hydraulic system for oil
The detection protective device of liquid dustiness, to achieve the purpose that prevent trouble before it happens.
Invention content
Purpose of the utility model is to overcome the above-mentioned shortcomings and provide a kind of detections for hydraulic oil pollution and circuit to protect
Protecting system, can real-time high-efficiency detect oil contamination degree, and feedback is made to system oil-way according to pollution level, to reach
Purpose system oil-way is protected, to prevent trouble before it happens.
In order to achieve the above object, the utility model includes the pump being connect with fuel tank, and pump is arranged in parallel with overflow valve, overflow
The output end access fuel tank (5) of valve, the output end of pump connect manual solenoid directional control valve with the input terminal of overflow valve, and manual electromagnetism changes
The in-line of three position four-way directional control valve is connected to valve, the oil return line of three position four-way directional control valve connects fuel tank, on oil return line parallel connection set
It is equipped with solid pollutant detection device and fluid contaminants detection device, solid pollutant detection device and fluid contaminants detection
Device is electrically connected with signal processing apparatus, and signal processing apparatus connects manual solenoid directional control valve；
Solid pollutant detection device is used to detect the solid contaminant in fluid, and fluid contaminants detection device is for examining
Survey the fluid contaminants in fluid.
Solid pollutant detection device includes transparent pipeline, and the side of transparent pipeline is provided with light source, and the other side is provided with
Photoelectric sensor for receiving the light for penetrating transparent pipeline.
Fluid contaminants detection device includes detection pipeline, and the both sides outer wall for detecting pipeline is enclosed with two pieces of identical arcs
Pole plate, detects and is equipped with thermal insulation lamella between pipeline and pole plate, and pole plate accesses signal deteching circuit.
Solid pollutant detection device and fluid contaminants detection device are arranged in series.
Solid pollutant detection device is arranged in the front end of fluid contaminants detection device.
Filter is provided on oil return line, the setting of solid pollutant detection device and fluid contaminants detection device is in mistake
The downstream of filter.
Compared with prior art, the utility model is provided with is constituted including two detection devices and manual solenoid directional control valve
The protective loop for the prevention work system failure, two detecting systems are related to the manual solenoid directional control valve in system oil-way
Connection, with treated, the control of detection device output current signal determines the manual solenoid directional control valve of oil circuit break-make, once oil contamination
Height is spent, solenoid directional control valve is closed, and system oil-way will stop work.This system reaction time is short, and oil circuit interrupts thoroughly, from root
On the phenomenon that having prevented machine " band dirty operation ".The utility model is provided with solid pollutant detection device and fluid contaminants inspection
Device is surveyed, solid contaminant present in fluid and fluid contaminants can be detected simultaneously.
Further, the utility model is polluted using the detection device based on pole plate for mixed liquid in fluid
The detection of object, the system are more comprehensive to the detection of pollutant, and testing result is relatively reliable.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of solid pollutant detection device in the utility model；
Fig. 3 is the structural schematic diagram of fluid contaminants detection device in the utility model；
Wherein, 1. three position four-way directional control valve, 2. signal processing apparatus, 3. solid pollutant detection devices, 4. filters, 5.
Fuel tank, 6. fluid contaminants detection devices, 7. overflow valves, 8. pumps, 9. manual solenoid directional control valves, 10. transparent pipelines, 11. light sources,
12. photoelectric sensor, 13. detection pipelines, 14. pole plates.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings.
Referring to Fig. 1, the utility model includes the pump 8 being connect with fuel tank 5, and pump 8 is arranged in parallel with overflow valve 7, overflow valve 7
Output end accesses fuel tank 5, pumps 8 output end and the input terminal of overflow valve 7 connects manual solenoid directional control valve 9, manual electromagnetic switch
Valve 9 connects the in-line of three position four-way directional control valve 1, and the oil return line of three position four-way directional control valve 1 connects fuel tank 5, in parallel on oil return line
It is provided with solid pollutant detection device 3 and fluid contaminants detection device 6, solid pollutant detection device 3 and liquid pollution
Analyte detection device 6 is electrically connected with signal processing apparatus 2, and signal processing apparatus 2 connects manual solenoid directional control valve 9；Solid pollution
Analyte detection device 3 and fluid contaminants detection device 6 are arranged in series, and solid pollutant detection device 3 is arranged in fluid contaminants
The front end of detection device 6 is provided with filter 4, solid pollutant detection device 3 and fluid contaminants detection device on oil return line
6 are arranged in the downstream of filter 4.
Solid pollutant detection device 3 is used to detect the solid contaminant in fluid, and fluid contaminants detection device 6 is used for
Detect the fluid contaminants in fluid.
Referring to Fig. 2, solid pollutant detection device 3 includes transparent pipeline 10, and the side of transparent pipeline 10 is provided with light source
11, the other side is provided with the photoelectric sensor 12 for receiving the light for penetrating transparent pipeline 10.
Referring to Fig. 3, fluid contaminants detection device 6 includes detection pipeline 13, detects the both sides outer wall of pipeline 13 by two pieces
Identical arc pole plate 14 wraps up, and opaque thermal insulation lamella is equipped between detection pipeline 13 and pole plate 14.Two pieces of pole plates
14 are placed in a measuring loop.It is polluted when being mixed into liquid in fluid, fluid dielectric constant changes between pole plate, measuring loop output
Corresponding electric signal is to processing unit.
Signal processing apparatus is for receiving the output signal from two parts detection device, and output is unique after integrating processing
Current signal.There are resonance circuit, photoelectric switching circuit, amplifying circuit in signal processing apparatus.Its output end and manual electromagnetism
The coil on 9 right side of reversal valve is connected.When the arrival preset value of oil contamination, signal processing apparatus output activation signal makes electricity
Magnet is powered, and reversal valve cuts off system oil-way.
Solid pollutant detection device 3 and fluid contaminants detection device 6 are detachable, periodic calibration and replacement detection dress
It sets.
When system oil-way works normally, manual solenoid directional control valve 9 is in left position on-state, controls three of performance loop
Four-way reversing valve 1 is in the arbitrary position in left and right.On in-line, fluid flows through pump 8, manual solenoid directional control valve 9 and three four from fuel tank
Logical reversal valve 1 enters performance loop；On oil return line, fluid is flowed out through three position four-way directional control valve 1, after being filtered by filter 4
It is divided into two-way, flows directly out fuel tank all the way, enters oil liquid detection system all the way.Fluid first flows through solid pollution analyte detection dress
3 are set, solid pollutant detection device 3 is directed to the detection of fluid solid contaminant.When, there are when solid contaminant, being come from fluid
A part of light of light source 11 is blocked, and the light quantity that photoelectric sensor 12 receives is reduced, after the converted circuit of signal, amplifying circuit
Export an electric signal.Fluid flows out solid pollutant detection device 3 and enters fluid contaminants detection device 6 due to fluid and water
Dielectric constants it is very big, when the fluid for being mixed into water flows through the detection pipeline 13 wrapped up by two pole plates 14, two poles
The capacitance for the capacitor that plate 14 is constituted changes therewith, according to the proportionate relationship of dielectric constant and capacitance, and joins
The capacitance in the case of pure fluid and pure water is examined, derivation conversion is carried out, obtains pollution level and measuring circuit output electric signal
Corresponding relation.The electric signal that solid pollutant detection device 3 and fluid contaminants detection device 6 export all leads to signal processing device
2 are set, signal processing apparatus 2 carries out necessary amplification to two parts of signals, integrates and convert, and exports unique current signal, with
The electromagnet coil of manual solenoid directional control valve 9 connects.When in fluid the sum of solid-state and fluid contaminants exceed normal range (NR), at this time
Output current reaches default value, electromagnet action, and manual solenoid directional control valve 9 is moved to right position, and oil circuit disconnects, and performance loop stops
It only works, 8 output fluid of pump flows back to fuel tank through overflow valve 7, avoids the possibility to work using heavily contaminated fluid.When working back
Circuit is interrupted when road still needs to short time work such as excavator swing arm, dipper, scraper bowl work half, needs to answer equipment at this time
Row replaces filter core or fluid again for position, can manually control manual solenoid directional control valve 9, so that it is restored on-state by force and grasped
Make.The utility model has reached more comprehensively constantly detecting to oil contamination, and is carried out to circuit when polluting exceeded
The purpose of protection.
Claims (6)
1. a kind of detection and loop protection system for hydraulic oil pollution, which is characterized in that include the pump being connect with fuel tank (5)
(8), pump (8) is arranged in parallel with overflow valve (7), and the output end access fuel tank (5) of overflow valve (7) pumps output end and the overflow of (8)
The input terminal of valve (7) connects manual solenoid directional control valve (9), manual solenoid directional control valve (9) connection three position four-way directional control valve (1) into
The oil return line of oil circuit, three position four-way directional control valve (1) connects fuel tank (5), and solid pollution analyte detection dress has been arranged in parallel on oil return line
Set (3) and fluid contaminants detection device (6), solid pollutant detection device (3) and fluid contaminants detection device (6) with
Signal processing apparatus (2) is electrically connected, and signal processing apparatus (2) connects manual solenoid directional control valve (9)；
Solid pollutant detection device (3) is used to detect the solid contaminant in fluid, and fluid contaminants detection device (6) is used for
Detect the fluid contaminants in fluid.
2. a kind of detection and loop protection system for hydraulic oil pollution according to claim 1, which is characterized in that Gu
Body pollution analyte detection device (3) includes transparent pipeline (10), and the side of transparent pipeline (10) is provided with light source (11), and the other side is set
It is equipped with the photoelectric sensor (12) for receiving the light for penetrating transparent pipeline (10).
3. a kind of detection and loop protection system for hydraulic oil pollution according to claim 1, which is characterized in that liquid
State pollutant testing apparatus (6) includes detection pipeline (13), and the both sides outer wall of detection pipeline (13) is enclosed with two pieces of identical arcs
Shape pole plate (14), is equipped with thermal insulation lamella between detection pipeline (13) and pole plate (14), pole plate (14) accesses signal deteching circuit.
4. a kind of detection and loop protection system for hydraulic oil pollution according to claim 1, which is characterized in that Gu
Body pollution analyte detection device (3) and fluid contaminants detection device (6) are arranged in series.
5. a kind of detection and loop protection system for hydraulic oil pollution according to claim 4, which is characterized in that Gu
Body pollution analyte detection device (3) is arranged in the front end of fluid contaminants detection device (6).
6. a kind of detection and loop protection system for hydraulic oil pollution according to claim 1, which is characterized in that return
Filter (4) is provided on oil circuit, the setting of solid pollutant detection device (3) and fluid contaminants detection device (6) is in mistake
The downstream of filter (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901017.XU CN207750314U (en) | 2017-12-29 | 2017-12-29 | A kind of detection and loop protection system for hydraulic oil pollution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721901017.XU CN207750314U (en) | 2017-12-29 | 2017-12-29 | A kind of detection and loop protection system for hydraulic oil pollution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207750314U true CN207750314U (en) | 2018-08-21 |
Family
ID=63151416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721901017.XU Expired - Fee Related CN207750314U (en) | 2017-12-29 | 2017-12-29 | A kind of detection and loop protection system for hydraulic oil pollution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207750314U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112572393A (en) * | 2019-09-30 | 2021-03-30 | 比亚迪股份有限公司 | Device for processing a hydraulic vehicle brake system |
-
2017
- 2017-12-29 CN CN201721901017.XU patent/CN207750314U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112572393A (en) * | 2019-09-30 | 2021-03-30 | 比亚迪股份有限公司 | Device for processing a hydraulic vehicle brake system |
| CN112572393B (en) * | 2019-09-30 | 2022-03-18 | 比亚迪股份有限公司 | Device for processing a hydraulic vehicle brake system |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 Termination date: 20181229 |