CN103291690B - Hydraulic system return oil filter device with flow measuring function - Google Patents
Hydraulic system return oil filter device with flow measuring function Download PDFInfo
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- CN103291690B CN103291690B CN201310204904.1A CN201310204904A CN103291690B CN 103291690 B CN103291690 B CN 103291690B CN 201310204904 A CN201310204904 A CN 201310204904A CN 103291690 B CN103291690 B CN 103291690B
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Abstract
A hydraulic system return oil filter device with a flow measuring function is characterized in that a cylindrical filter screen is arranged in a main casing with an oil inlet at the lower end, and an alarm and a temperature measuring device can be arranged at an upper end cover above the filter screen. A throttling ring is arranged at the end top of a horizontal portion of the main casing, a movable casing is arranged outside the throttling ring, two vertical through holes are formed in each of the main casing on two sides of the throttling ring and the lower wall of the movable casing and correspond to vertical through holes on the upper wall of a differential pressure transmitter arranged below, a cover plate is arranged on a casing opening of the differential pressure transmitter and is provided with a signal transmission port on the outer side, two sensors connected with the signal transmission port are arranged in communicated through holes of the main casing and an auxiliary casing respectively, the inner side of the cover plate is connected with one end of a spring, and the other end of the spring is connected with a piston arranged between the two vertical through holes. The hydraulic system return oil filter device integrates functions of filtering and flow measuring of hydraulic oil and has the advantages of compact structure, accuracy in measuring, low cost and convenience in maintenance.
Description
Technical field
The present invention relates to a kind of annex of hydraulic system, especially for the filter of hydraulic system oil return.
Background technology
The filter major function of hydraulic system is the solid pollutant in filtered fluid pressing system working media, to keep the cleannes of working media, the hydraulic system fault overwhelming majority is caused by the pollution of working media, and thus filter is indispensable for hydraulic system.Flow is also a very important technical parameter in industrial production detection control.Existing hydraulic services is mostly for simple function, as system hydraulic oil filtering and flow measurement all need different hydraulic services to carry out synthetic operation, not only make system complex loaded down with trivial details, and add cost to a certain extent, traditional flowmeter has mounting condition comparatively harsh (before and after requiring, straight length is long) simultaneously, safeguards the shortcomings such as numerous and diverse.
Summary of the invention
The object of the present invention is to provide a kind of return oil filter device of hydraulic system with flow measurement function having oil return filter, flow measurement, warning concurrently and measure the several functions such as oil temperature.
The present invention mainly includes: main casing, filter screen, restrictor ring, movable housing and differential pressure transmitter.Wherein, main casing is made up of vertical cylindrical shell and the horizontal cylinder that is connected with its upper vertical.This main casing vertical portion lower end is provided with the oil-in that can be connected with return line.Preferably this oil-in is established one extend in main casing in pipe, this interior pipe and main casing are connected by screw, and are provided with gasket seal between interior pipe and main casing, and the internal thread of this interior pipe can be threaded with return line.Best, main casing vertical portion bottom is provided with fuel outlet, which is provided with plug screw.In main casing vertical portion, establish the tubular filter screen highly exceeding main casing horizontal component inner chamber, between this filter screen lower end and oil-in, establish seal, prevent the oil return of filtered from from then on flowing out.The main casing on this filter screen top is provided with upper end cover.Best upper end cover is provided with pressure reduction alarm, the display section of this pressure reduction alarm is located at outside upper end cover, it is interior and tactile with spring interface that Sensor section is located at upper end cover, this spring upper end contacts with upper end cover, lower end is placed on floating cover, and this floating cover is provided with central through hole, and the guide rod upper end through this central through hole and spring is connected with upper end cover, lower end diameter is greater than through-hole diameter, and floating cover can be moved up and down along guide rod.This floating cover upper periphery contacts with sleeve, and floating cover bottom is provided with as its spacing check ring, and this check ring periphery is placed in the annular groove of sleeve lining.This sleeve is the short tube that flanging is established in upper end, and its short tubular portions is inserted in filter screen, and flanging is stuck between filter screen and upper end cover boss, is provided with sealing ring between flanging and filter screen, leaves space between sleeve flanging and upper end cover boss.Best upper end cover is also provided with temperature-measuring module, for monitoring the temperature of oil return.The restrictor ring that anchor ring is adjacent is provided with, preferably its central through hole and the concentricity line of place cavity on the end top of main casing horizontal component.Outside restrictor ring, be provided with the movable housing be connected with main casing horizontal component, this movable housing is provided with horizontal through hole, and it is corresponding with the screw on main casing horizontal component end top, and movable housing is connected with main casing horizontal component by the screw through horizontal through hole.For Leakage prevention, best movable housing and main casing horizontal component junction are stairstepping, all establish sealing ring between the two and between movable housing and restrictor ring.Main casing again in restrictor ring both sides and movable housing lower wall are respectively equipped with two vertical through holes, and it is corresponding with the vertical through hole of differential pressure transmitter sub-shell upper wall set below.The trough-shaped housing that this differential pressure transmitter has one end to close, its opening is located at below main casing oil-out, opening is provided with cover plate, gasket seal is provided with between cover plate and housing, be provided with signal transmission port outside cover plate, two sensors be connected with this signal transmission port are located in the through hole that main casing is connected with sub-shell respectively.Be connected with spring one end inside cover plate, the other end of spring is connected with the piston be located between two vertical through holes, and this piston cross-section is corresponding with the cross section of sub-shell inner chamber.Best above-mentioned sub-shell is provided with vertical through hole, and it is corresponding with the screw of main casing horizontal component and movable housing lower wall, and sub-shell is connected with main casing horizontal component and movable housing by the screw through vertical through hole.
The course of work of the present invention is roughly as follows: the oil return of hydraulic system enters from the oil-in of main casing lower end, filtered by filter screen, clean fluid after filtration through restrictor ring to oil-out, so produce pressure difference value in restrictor ring both sides, and restrictor ring both sides are provided with two pressure point A and B respectively, respectively the pressure P 1 of A, B 2, P2 are fed back to differential pressure transmitter, produce pressure difference signal, pressure difference signal is changed into the signal of telecommunication by the sensor of last differential pressure transmitter, spread out of by signal transmission port and process, thus obtaining flow information.When causing device pressure to raise when pollutant blocking filter screen; the floating cover of warning device moves up and to exert pressure to pressure reduction alarm under the effect of pressure oil and spring; pressure reduction alarm is made to send alarm signal; simultaneously due to floating cover moving; fluid by the space overflow between upper end cover boss, thus plays the effect of safeguard protection.
The present invention compared with prior art tool has the following advantages:
(1) filter and flowmeter are combined as a whole by the present invention, can not only remove the impurity in hydraulic system oil return, effectively ensure that working media cleannes, thus extend Hydraulic Elements service life to a certain extent, improve the reliability of system works; Oil return flow can also be measured simultaneously, it is monitored in real time.
(2) structure of the present invention is simple, and relative compact, reduces production cost; Improve mounting condition, easy to maintenance.
(3) the present invention also can be provided with pressure reduction alarm, can send alarm signal, ensure that equipment safety operation when pollutant blocks.
(4) the present invention also can be provided with temperature survey port, can add measurement module, to realize temperature survey.
Accompanying drawing explanation
To be that the present invention is main look simplified schematic diagram to Fig. 1.
Fig. 2 is side-looking simplified schematic diagram of the present invention.
To be that the present invention is main cut open simplified schematic diagram depending on office to Fig. 3.
Fig. 4 is I close-up schematic view in Fig. 3.
Fig. 5 is II close-up schematic view in Fig. 3.
Detailed description of the invention
Have in the simplified schematic diagram of the return oil filter device of hydraulic system of flow measurement function shown in Fig. 1, Fig. 2 and Fig. 3, main casing 1 is made up of vertical cylindrical shell and the horizontal cylinder that is connected with its upper vertical.This main casing vertical portion lower end is provided with oil-in, this oil-in is established one extend in main casing in pipe 2, this interior pipe is connected by screw 3 with main casing, is provided with gasket seal 4 between main casing and interior pipe, and the internal thread of this interior pipe can be threaded with return line.Main casing vertical portion lower wall is provided with fuel outlet, which is provided with plug screw 5.In main casing vertical portion, establish the tubular filter screen 6 highly exceeding main casing horizontal component inner chamber, between this filter screen lower end and oil-in, establish seal 7.The main casing on this filter screen top is provided with upper end cover 8, is provided with gasket seal 9 between upper end cover and main casing.Upper end cover is provided with pressure reduction alarm 10, the display section of this pressure reduction alarm is located at outside upper end cover, Sensor section to be located in upper end cover and to contact with spring 13, this spring upper end contacts with upper end cover, lower end is placed on floating cover 11, this floating cover is provided with central through hole, and guide rod 12 upper end through this central through hole and spring is connected with upper end cover, and lower end diameter is greater than through-hole diameter.This floating cover upper periphery contacts with sleeve, and floating cover bottom is provided with as its spacing check ring 14, and this check ring periphery is placed in the annular groove of sleeve 15 inwall.This sleeve is the short tube that flanging is established in upper end, and its short tubular portions is inserted in filter screen, and flanging is stuck between filter screen and upper end cover boss, is provided with sealing ring 16, as shown in Figure 4 between flanging and filter screen.Space is left between sleeve flanging and upper end cover boss.Upper end cover is also provided with temperature-measuring module 17.The restrictor ring 18 that anchor ring is adjacent is provided with, its central through hole and the concentricity line of place cavity on the end top of main casing horizontal component.Outside restrictor ring, establish movable housing 19, its cross-sectional lumen inside dimension is identical with main casing horizontal component.This movable housing is provided with horizontal through hole, and it is corresponding with the screw on main casing horizontal component end top, and movable housing is connected with main casing horizontal component by the screw 20 through horizontal through hole.Movable housing and main casing horizontal component junction are stairstepping, between the two and all establish sealing ring 21,22 between movable housing and restrictor ring, as shown in Figure 5.The main casing of restrictor ring both sides and movable housing lower wall are respectively equipped with two vertical through hole A and B, and it is corresponding with the vertical through hole of differential pressure transmitter 23 sub-shell upper wall below, is provided with gasket seal 24 between differential pressure transmitter sub-shell upper wall and main casing.This differential pressure transmitter is the trough-shaped housing having one end to close, its opening is located at below main casing oil-out, opening is provided with cover plate 25, cover plate is connected by screw 26 with housing, gasket seal 27 is provided with between cover plate and housing, be provided with signal transmission port 28 outside cover plate, two sensors be connected with this signal transmission port are located in the through hole that main casing is connected with sub-shell respectively.Be connected with spring 29 one end inside cover plate, the other end of spring is connected with the piston 30 be located between two vertical through holes, and this piston cross-section is corresponding with the cross section of sub-shell inner chamber.Above-mentioned sub-shell is provided with vertical through hole, and it is corresponding with the screw of main casing horizontal component and movable housing lower wall, and sub-shell is connected with main casing horizontal component and movable housing by the screw 31 through vertical through hole.
Claims (9)
1. one kind has the return oil filter device of hydraulic system of flow measurement function, it is characterized in that: main casing vertical portion lower end is provided with the oil-in that can be connected with return line, this oil-in is provided with internal thread, the tubular filter screen highly exceeding main casing horizontal component inner chamber is established in main casing vertical portion, the main casing on this filter screen top is provided with upper end cover, restrictor ring is provided with on the end top of main casing horizontal component, the movable housing be connected with main casing horizontal component is established outside restrictor ring, main casing again in restrictor ring both sides and movable housing lower wall are respectively equipped with two vertical through hole A and B, it is corresponding with the vertical through hole of differential pressure transmitter sub-shell upper wall set below, this differential pressure transmitter shell nozzle is located at below main casing oil-out, opening is provided with cover plate, signal transmission port is provided with outside cover plate, two sensors be connected with this signal transmission port are located in two through hole A and B that main casing is connected with sub-shell respectively, be connected with spring one end inside cover plate, the other end of spring is connected with the piston be located between two vertical through holes, this piston cross-section is corresponding with the cross section of sub-shell inner chamber.
2. the return oil filter device of hydraulic system with flow measurement function according to claim 1, it is characterized in that: main casing upper end cover is provided with pressure reduction alarm, the display section of this pressure reduction alarm is located at outside upper end cover, it is interior and tactile with spring interface that Sensor section is located at upper end cover, this spring upper end contacts with upper end cover, lower end is placed on floating cover, this floating cover is provided with central through hole, guide rod upper end through this central through hole and spring is connected with upper end cover, lower end diameter is greater than through-hole diameter, this floating cover upper periphery contacts with sleeve, floating cover bottom is provided with as its spacing check ring, this check ring periphery is placed in the annular groove of sleeve lining, this sleeve is the short tube that flanging is established in upper end, its short tubular portions is inserted in filter screen, flanging is stuck between filter screen and upper end cover boss, sealing ring is provided with between flanging and filter screen, space is left between sleeve flanging and upper end cover boss.
3. the return oil filter device of hydraulic system with flow measurement function according to claim 1 and 2, is characterized in that: main casing upper end cover is provided with temperature-measuring module.
4. the return oil filter device of hydraulic system with flow measurement function according to claim 3, is characterized in that: movable housing and main casing horizontal component junction are stairstepping, all establish sealing ring between the two and between movable housing and restrictor ring.
5. the return oil filter device of hydraulic system with flow measurement function according to claim 4, it is characterized in that: oil-in is established one extend in main casing in pipe, be connected by screw between this interior pipe and main casing, be provided with gasket seal between main casing and interior pipe, the internal thread of this interior pipe can be threaded with return line.
6. the return oil filter device of hydraulic system with flow measurement function according to claim 5, is characterized in that: main casing vertical portion bottom is provided with fuel outlet, which is provided with plug screw.
7. the return oil filter device of hydraulic system with flow measurement function according to claim 6, it is characterized in that: movable housing is provided with horizontal through hole, it is corresponding with the screw on main casing horizontal component end top, and movable housing is connected with main casing horizontal component by the screw through horizontal through hole.
8. the return oil filter device of hydraulic system with flow measurement function according to claim 7, it is characterized in that: sub-shell is provided with vertical through hole, it is corresponding with the screw of main casing horizontal component and movable housing lower wall, and sub-shell is connected with main casing horizontal component and movable housing by the screw through vertical through hole.
9. the return oil filter device of hydraulic system with flow measurement function according to claim 8, is characterized in that: establish seal between filter screen lower end and oil-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310204904.1A CN103291690B (en) | 2013-05-29 | 2013-05-29 | Hydraulic system return oil filter device with flow measuring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310204904.1A CN103291690B (en) | 2013-05-29 | 2013-05-29 | Hydraulic system return oil filter device with flow measuring function |
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| Publication Number | Publication Date |
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| CN103291690A CN103291690A (en) | 2013-09-11 |
| CN103291690B true CN103291690B (en) | 2015-04-29 |
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| CN201310204904.1A Expired - Fee Related CN103291690B (en) | 2013-05-29 | 2013-05-29 | Hydraulic system return oil filter device with flow measuring function |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5535588A (en) * | 1994-05-06 | 1996-07-16 | Dana Corporation | Filter arrangement for single-acting telescopic hydraulic cylinders |
| GB2311590A (en) * | 1996-03-23 | 1997-10-01 | Festo Kg | Venting valve |
| DE19614263A1 (en) * | 1996-04-11 | 1997-10-16 | Rexroth Mannesmann Gmbh | Hydraulic oil filter |
| CN101785939A (en) * | 2009-09-08 | 2010-07-28 | 四川神坤装备股份有限公司 | Differential pressure adjustable automatic backwashing filter |
| CN202040155U (en) * | 2011-03-31 | 2011-11-16 | 乐清市东风煤矿设备有限公司 | Large-quantity back wash filter |
| CN202056138U (en) * | 2011-04-12 | 2011-11-30 | 新乡平原航空技术工程有限公司 | Plate filter |
-
2013
- 2013-05-29 CN CN201310204904.1A patent/CN103291690B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5535588A (en) * | 1994-05-06 | 1996-07-16 | Dana Corporation | Filter arrangement for single-acting telescopic hydraulic cylinders |
| GB2311590A (en) * | 1996-03-23 | 1997-10-01 | Festo Kg | Venting valve |
| DE19614263A1 (en) * | 1996-04-11 | 1997-10-16 | Rexroth Mannesmann Gmbh | Hydraulic oil filter |
| CN101785939A (en) * | 2009-09-08 | 2010-07-28 | 四川神坤装备股份有限公司 | Differential pressure adjustable automatic backwashing filter |
| CN202040155U (en) * | 2011-03-31 | 2011-11-16 | 乐清市东风煤矿设备有限公司 | Large-quantity back wash filter |
| CN202056138U (en) * | 2011-04-12 | 2011-11-30 | 新乡平原航空技术工程有限公司 | Plate filter |
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| CN103291690A (en) | 2013-09-11 |
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Granted publication date: 20150429 Termination date: 20190529 |
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