CN201671916U - Hydraulic servo valve protection device and hydraulic servo valve anti-pollution protection circuit - Google Patents
Hydraulic servo valve protection device and hydraulic servo valve anti-pollution protection circuit Download PDFInfo
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- CN201671916U CN201671916U CN2010202069437U CN201020206943U CN201671916U CN 201671916 U CN201671916 U CN 201671916U CN 2010202069437 U CN2010202069437 U CN 2010202069437U CN 201020206943 U CN201020206943 U CN 201020206943U CN 201671916 U CN201671916 U CN 201671916U
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Abstract
The utility model relates to a hydraulic servo valve protection device and a hydraulic servo valve anti-pollution protection circuit, wherein a front oil port of the hydraulic servo valve protection device is communicated with a rear oil port through a first one-way valve, the front oil port is further communicated with the rear oil port through a second one-way valve and a first high pressure filter, the hydraulic servo valve anti-pollution protection circuit comprises the hydraulic servo valve protection device, a hydraulic servo valve, an oil cylinder, an oil pump, an oil tank, an energy accumulator, a third one-way valve, a second high pressure filter and an oil delivery pipeline, an outlet of the oil tank is communicated with a P cavity and the energy accumulator of the hydraulic servo valve through the hydraulic servo valve protection device and the third one-way valve, a A cavity of the hydraulic servo valve is communicated with the oil cylinder through the hydraulic servo valve protection device, a T cavity of the hydraulic servo valve is communicated with an inlet of the oil tank, and a B cavity of the hydraulic servo valve is sealed. The utility model provides a hydraulic servo valve protection device and a hydraulic servo valve anti-pollution protection circuit, which have excellent protection effect and simple structure.
Description
(1), technical field: the utility model relates to a kind of servovalve protective gear and servovalve protection loop, particularly a kind of hydraulic efficiency servo-valve protective gear and the anti-pollution protection of hydraulic efficiency servo-valve loop.
(2), background technique: in the rolling industry of aluminium, the thickness of products such as aluminium sheet, band, paper tinsel is realized by thickness control system AGC automatically by the hydraulic pressure system that presses usually, the structure of hydraulic efficiency servo-valve control loop wherein as shown in Figure 1, in process of production, oil cylinder 1 is because frequent operation, can produce some metal particles, when oil cylinder 1 presses down, fluid and the metal particle servovalve 6 of directly flowing through, spool to servovalve 6 pollutes (requirement of 6 pairs of hydraulic oil liquids of servovalve is very high, generally palpus turbidity test NSA6 level).Because it is the filter protection of 5 μ m that there is precision in the oil inlet P chamber of servovalve 6; and any protecting component is not installed between the actuator port A of servovalve 6 and the oil cylinder 1; metal particle that oil cylinder 1 wearing and tearing produce and the contamination particle in the fluid are when flowing through servovalve 6; can cause the stuck of servovalve 6 spools; this just makes in process of production owing to the problem of servovalve 6 is often shut down maintenance, changed; cause manufacturing efficiency low, maintenance cost rises.Non-ferrous metal industry is not taken measures on customs clearance to all having in the design of this type of oil hydraulic circuit, and therefore in actual production, servovalve 6 often breaks down.
(3), model utility content:
The technical problems to be solved in the utility model is: at the prior art deficiency, provide a kind of hydraulic efficiency servo-valve protective gear effective, simple in structure and the anti-pollution protection of hydraulic efficiency servo-valve loop protected.
The technical solution of the utility model:
A kind of hydraulic efficiency servo-valve protective gear; contain preceding hydraulic fluid port, back hydraulic fluid port, oil transport pipeline; also contain first one-way valve, second one-way valve, first high pressure filter; preceding hydraulic fluid port is communicated with the inlet of first one-way valve; the outlet of first one-way valve is communicated with the back hydraulic fluid port; preceding hydraulic fluid port also is communicated with the outlet of second one-way valve, and the inlet of second one-way valve is communicated with the outlet of first high pressure filter, and the inlet of first high pressure filter is communicated with the back hydraulic fluid port.
A kind of anti-pollution protection of hydraulic efficiency servo-valve loop of containing described hydraulic efficiency servo-valve protective gear; also contain hydraulic efficiency servo-valve; oil cylinder; oil pump; fuel tank; accumulator; the 3rd one-way valve; second high pressure filter; oil transport pipeline; the outlet of fuel tank is communicated with the inlet of oil pump; the outlet of oil pump is communicated with by the inlet of valve with second high pressure filter; the outlet of second high pressure filter is communicated with the inlet of the 3rd one-way valve; the outlet of the 3rd one-way valve is communicated with the P chamber of hydraulic efficiency servo-valve; the A chamber of hydraulic efficiency servo-valve is communicated with the preceding hydraulic fluid port of described hydraulic efficiency servo-valve protective gear; the back hydraulic fluid port of hydraulic efficiency servo-valve protective gear is communicated with oil cylinder; the T chamber of hydraulic efficiency servo-valve is communicated with the inlet of fuel tank; the B chamber sealing of hydraulic efficiency servo-valve, the P chamber of hydraulic efficiency servo-valve also is communicated with accumulator.
The T chamber of hydraulic efficiency servo-valve is communicated with the preceding hydraulic fluid port of hydraulic efficiency servo-valve protective gear by first stop valve, and the T chamber of hydraulic efficiency servo-valve also is communicated with the P chamber of hydraulic efficiency servo-valve by second stop valve.
First stop valve and second stop valve are high-pressure stop valve; Valve is a high pressure valve.
The pressure process is on the oil cylinder in the anti-pollution protection of hydraulic efficiency servo-valve loop: at first; oil pump pumps the hydraulic oil liquid in the fuel tank; enter the P chamber of hydraulic efficiency servo-valve behind hydraulic oil liquid process valve, second high pressure filter, the 3rd one-way valve; at this moment; during the SV2 coil electricity of hydraulic efficiency servo-valve; the spool of hydraulic efficiency servo-valve is to left movement; the A chamber of hydraulic efficiency servo-valve communicates with the P chamber; the T chamber of hydraulic efficiency servo-valve communicates with the B chamber of sealing; therefore the T chamber is closed, and at this moment, hydraulic oil liquid flows out from the A chamber of hydraulic efficiency servo-valve; lead to oil cylinder through first one-way valve, oil cylinder moves upward.
The oil cylinder process of pressing down in the anti-pollution protection of hydraulic efficiency servo-valve loop is: oil cylinder moves downward; behind first high pressure filter, second one-way valve, enter the A chamber of hydraulic efficiency servo-valve from the hydraulic oil liquid of oil cylinder outflow; at this moment; the SV1 coil electricity of hydraulic efficiency servo-valve, the spool of hydraulic efficiency servo-valve moves right, and the A chamber of hydraulic efficiency servo-valve is communicated with the T chamber; the P chamber is communicated with the B chamber of sealing; therefore the P chamber is closed, and at this moment, hydraulic oil liquid oil is got back to fuel tank after flowing out from the T chamber of hydraulic efficiency servo-valve.
First stop valve and second stop valve all are in closed condition when proper functioning, when needs carry out the pipeline maintenance, open two stop valves, and pressure duct, oil cylinder just are communicated with fuel tank, make the pressure off-load in pipeline, the oil cylinder, so that safety inspection.
The beneficial effects of the utility model:
1. hydraulic efficiency servo-valve protective gear of the present utility model is in the past hydraulic fluid port backward during hydraulic fluid port stream of hydraulic oil liquid; hydraulic oil liquid flows through from first one-way valve; when hydraulic oil liquid from back hydraulic fluid port hydraulic fluid port when stream forward; hydraulic oil liquid flows through from first high pressure filter and second one-way valve; the hydraulic oil liquid that refluxes in the oil cylinder can be filtered like this; purified the hydraulic oil liquid between oil cylinder and the hydraulic efficiency servo-valve; effectively reduced of the infringement of the contamination particle of oil cylinder to the critical elements hydraulic efficiency servo-valve; prevented that pollution because of hydraulic oil liquid from causing the fault of hydraulic efficiency servo-valve; it is low to have improved manufacturing efficiency, has reduced maintenance cost.
2. hydraulic efficiency servo-valve protective gear of the present utility model has only adopted two one-way valves and a high pressure filter, and is simple in structure, cost of production is low.
(4), description of drawings:
Fig. 1 is the structural representation of existing hydraulic efficiency servo-valve control loop;
Fig. 2 is the structural representation in the anti-pollution protection of hydraulic efficiency servo-valve loop.
(5), embodiment:
Referring to Fig. 2; among the figure; hydraulic efficiency servo-valve protective gear 11 contains preceding hydraulic fluid port I, back hydraulic fluid port O, oil transport pipeline; also contain first one-way valve 8, second one-way valve 9, first high pressure filter 10; preceding hydraulic fluid port I is communicated with the inlet of first one-way valve 8, and the outlet of first one-way valve 8 is communicated with back hydraulic fluid port O, and preceding hydraulic fluid port I also is communicated with the outlet of second one-way valve 9; the inlet of second one-way valve 9 is communicated with the outlet of first high pressure filter 10, and the inlet of first high pressure filter 10 is communicated with the back hydraulic fluid port.
Hydraulic efficiency servo-valve protective gear 11 is contained in the anti-pollution protection of hydraulic efficiency servo-valve loop; hydraulic efficiency servo-valve 6; oil cylinder 1; oil pump 3; fuel tank 2; accumulator 14; the 3rd one-way valve 5; second high pressure filter 4; oil transport pipeline; the outlet of fuel tank 2 is communicated with the inlet of oil pump 3; the outlet of oil pump 3 is communicated with the inlet of second high pressure filter 4 by valve 7; the outlet of second high pressure filter 4 is communicated with the inlet of the 3rd one-way valve 5; the outlet of the 3rd one-way valve 5 is communicated with the P chamber of hydraulic efficiency servo-valve 6; the A chamber of hydraulic efficiency servo-valve 6 is communicated with the preceding hydraulic fluid port I of hydraulic efficiency servo-valve protective gear 11; the back hydraulic fluid port O of hydraulic efficiency servo-valve protective gear 11 is communicated with oil cylinder 1; the T chamber of hydraulic efficiency servo-valve 6 is communicated with the inlet of fuel tank 2; the B chamber sealing of hydraulic efficiency servo-valve 6, the P chamber of hydraulic efficiency servo-valve 6 also is communicated with accumulator 14.
The T chamber of hydraulic efficiency servo-valve 6 is communicated with the preceding hydraulic fluid port I of hydraulic efficiency servo-valve protective gear 11 by first stop valve 12, and the T chamber of hydraulic efficiency servo-valve 6 also is communicated with the P chamber of hydraulic efficiency servo-valve 6 by second stop valve 13.
First stop valve 12 and second stop valve 13 are high-pressure stop valve; Valve 7 is a high pressure valve.
The pressure process is on the oil cylinder 1 in the anti-pollution protection of hydraulic efficiency servo-valve loop: at first; oil pump 3 pumps the hydraulic oil liquid in the fuel tank 2; hydraulic oil liquid is through valve 7; second high pressure filter 4; enter the P chamber of hydraulic efficiency servo-valve 6 behind the 3rd one-way valve 5; at this moment; during the SV2 coil electricity of hydraulic efficiency servo-valve 6; the spool of hydraulic efficiency servo-valve 6 is to left movement; the A chamber of hydraulic efficiency servo-valve 6 communicates with the P chamber; the T chamber of hydraulic efficiency servo-valve 6 communicates with the B chamber of sealing; therefore the T chamber is closed, and at this moment, hydraulic oil liquid flows out from the A chamber of hydraulic efficiency servo-valve 6; lead to oil cylinder 1 through first one-way valve 8, oil cylinder 1 moves upward.
The oil cylinder process of pressing down in the anti-pollution protection of hydraulic efficiency servo-valve loop is: oil cylinder 1 moves downward; behind first high pressure filter 10, second one-way valve 9, enter the A chamber of hydraulic efficiency servo-valve 6 from the hydraulic oil liquid of oil cylinder 1 outflow; at this moment; the SV1 coil electricity of hydraulic efficiency servo-valve 6, the spool of hydraulic efficiency servo-valve 6 moves right, and the A chamber of hydraulic efficiency servo-valve 6 is communicated with the T chamber; the P chamber is communicated with the B chamber of sealing; therefore the P chamber is closed, and at this moment, hydraulic oil liquid oil is got back to fuel tank 2 after flowing out from the T chamber of hydraulic efficiency servo-valve 6.
First stop valve 12 and second stop valve 13 all are in closed condition when proper functioning, when needs carry out the pipeline maintenance, open two stop valves, and pressure duct, oil cylinder 1 just are communicated with fuel tank 2, make the pressure off-load in pipeline, the oil cylinder 1, so that safety inspection.
Claims (4)
1. hydraulic efficiency servo-valve protective gear; contain preceding hydraulic fluid port, back hydraulic fluid port, oil transport pipeline; it is characterized in that: also contain first one-way valve, second one-way valve, first high pressure filter; preceding hydraulic fluid port is communicated with the inlet of first one-way valve; the outlet of first one-way valve is communicated with the back hydraulic fluid port; preceding hydraulic fluid port also is communicated with the outlet of second one-way valve, and the inlet of second one-way valve is communicated with the outlet of first high pressure filter, and the inlet of first high pressure filter is communicated with the back hydraulic fluid port.
2. the anti-pollution protection of hydraulic efficiency servo-valve loop of containing the described hydraulic efficiency servo-valve protective gear of claim 1; it is characterized in that: also contain hydraulic efficiency servo-valve; oil cylinder; oil pump; fuel tank; accumulator; the 3rd one-way valve; second high pressure filter; oil transport pipeline; the outlet of fuel tank is communicated with the inlet of oil pump; the outlet of oil pump is communicated with by the inlet of valve with second high pressure filter; the outlet of second high pressure filter is communicated with the inlet of the 3rd one-way valve; the outlet of the 3rd one-way valve is communicated with the P chamber of hydraulic efficiency servo-valve; the A chamber of hydraulic efficiency servo-valve is communicated with the preceding hydraulic fluid port of described hydraulic efficiency servo-valve protective gear; the back hydraulic fluid port of hydraulic efficiency servo-valve protective gear is communicated with oil cylinder; the T chamber of hydraulic efficiency servo-valve is communicated with the inlet of fuel tank; the B chamber sealing of hydraulic efficiency servo-valve, the P chamber of hydraulic efficiency servo-valve also is communicated with accumulator.
3. the anti-pollution protection of hydraulic efficiency servo-valve according to claim 2 loop; it is characterized in that: the T chamber of described hydraulic efficiency servo-valve is communicated with the preceding hydraulic fluid port of hydraulic efficiency servo-valve protective gear by first stop valve, and the T chamber of hydraulic efficiency servo-valve also is communicated with the P chamber of hydraulic efficiency servo-valve by second stop valve.
4. the anti-pollution protection of hydraulic efficiency servo-valve according to claim 3 loop, it is characterized in that: described first stop valve and second stop valve are high-pressure stop valve; Described valve is a high pressure valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202069437U CN201671916U (en) | 2010-05-28 | 2010-05-28 | Hydraulic servo valve protection device and hydraulic servo valve anti-pollution protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202069437U CN201671916U (en) | 2010-05-28 | 2010-05-28 | Hydraulic servo valve protection device and hydraulic servo valve anti-pollution protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201671916U true CN201671916U (en) | 2010-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202069437U Expired - Fee Related CN201671916U (en) | 2010-05-28 | 2010-05-28 | Hydraulic servo valve protection device and hydraulic servo valve anti-pollution protection circuit |
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| CN (1) | CN201671916U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314884A (en) * | 2013-09-11 | 2015-01-28 | 昆山新金福精密电子有限公司 | Hydraulic fine adjustment system |
| CN106151133A (en) * | 2015-03-28 | 2016-11-23 | 鞍钢股份有限公司 | A kind of equalizing line guaranteeing vertical roll spindle lift cylinder balance pressure stability |
-
2010
- 2010-05-28 CN CN2010202069437U patent/CN201671916U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314884A (en) * | 2013-09-11 | 2015-01-28 | 昆山新金福精密电子有限公司 | Hydraulic fine adjustment system |
| CN106151133A (en) * | 2015-03-28 | 2016-11-23 | 鞍钢股份有限公司 | A kind of equalizing line guaranteeing vertical roll spindle lift cylinder balance pressure stability |
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| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20101215 Termination date: 20180528 |
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| CF01 | Termination of patent right due to non-payment of annual fee |