CN2303963Y - Oil-leakage monitoring alarming device for use under pressure-maintaining condition - Google Patents
Oil-leakage monitoring alarming device for use under pressure-maintaining condition Download PDFInfo
- Publication number
- CN2303963Y CN2303963Y CN 97208399 CN97208399U CN2303963Y CN 2303963 Y CN2303963 Y CN 2303963Y CN 97208399 CN97208399 CN 97208399 CN 97208399 U CN97208399 U CN 97208399U CN 2303963 Y CN2303963 Y CN 2303963Y
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- shut
- pressure
- leakage monitoring
- 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
- 238000012544 monitoring process Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000012856 packing Methods 0.000 claims description 8
- 230000001681 protective effect Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
Abstract
The utility model relates to an oil-liquid leakage monitoring and alarming device which is used when a hydraulic actuating mechanism lies in a pressure maintaining state. The utility model is composed of stop valves which are connected in parallel, and a pressure differential signaler of a hydraulic control one-way valve, wherein, the control opening of the hydraulic control one-way valve is connected with a pressure oil passage through a change valve. When used, the utility model is connected in series to a protective oil passage. When the actuating mechanism acts, the one-way valve is opened. When the actuating mechanism lies in the pressure maintaining state, the one-way valve is closed. When the oil passage is in failure to leak, the stop valves can be closed automatically, and the oil passage which is leaked can be cut off. Simultaneously, the pressure differential signaler sends out a fault alarm signal.
Description
The utility model relates to a kind of hydraulic pressure installation, specifically a kind of oil liquid leakage monitoring alarm device when being used for hydraulic actuator and being in packing state.
Leak supervision method when at present, hydraulic actuator being in packing state is to utilize the force value of pressure measurement electric device measurement pressurize oil circuits such as pressure relay to judge indirectly whether oil circuit leaks.Force value when its force value was lower than pressurize when oil circuit leaked is measured electric device and is sent signal, comes controlled hydraulic system to cut off by automatical control system and leaks oil circuit.But there is following problem in this supervisory device: 1. the pressure of pressure-measuring point will be subjected to the influence of the liquid resistance between actual leakage point and pressure-measuring point when leaking, and the thickness of the size of this liquid resistance and 2 distance, pipeline and point-to-point transmission element what etc. factor relevant, be that pressure-measuring point is different to the resistance of the liquid between actual leakage point, the pressure of pressure-measuring point is also different when then leaking, be applicable to the leak pressure on all measuring points on the protected oil circuit so this monitor mode can't accurately be adjusted, thereby greatly reduce the accuracy of detection; When protected oil circuit because of outside load changing or other reason when pressure surge occurring, easily produce misoperation and false alarm.
Task of the present utility model provides a kind of oil liquid leakage monitoring alarm device that is used for accurately and reliably under the packing state.
Task of the present utility model is to finish in the following manner: the oil liquid leakage monitoring alarm device that is used under the packing state that is provided is made up of shut off valve parallel with one another, Pilot operated check valve and differential signal-transmitting machine, and wherein the control mouth of Pilot operated check valve joins by selector valve and pressure oil circuit.This device serial connection (as P mouth, A mouth or B mouth that can be connected on the hydraulic actuator main reversing valve) on protected oil circuit during use is when needs hydraulic actuator (oil cylinder or oil motor) moves.By above-mentioned selector valve Pilot operated check valve is opened, fluid flows to hydraulic actuator through Pilot operated check valve.When hydraulic actuator was in packing state, Pilot operated check valve was closed, and this device enters the leak supervision state.(non-fault state) pressure oil liquid can be by shut off valve to hydraulic actuator supplementary pressure fluid, so that keep the normal pressurize of hydraulic actuator in allowed limits the time when the leakage rate of pipeline and hydraulic actuator.When pipeline or hydraulic actuator break down and when leaking, the fluid flow by shut off valve will surpass the flow (being the control flow rate of shut off valve) that is allowed, and shut off valve can be closed automatically, thereby cut off the oil circuit that leaks take place.Meanwhile, can reduce owing to leak the pressure of side, so differential signal-transmitting machine sends failure alarm signal.
Above-mentioned shut off valve can adopt existing bacterium valve formula shut off valve, but preferably adopts moving valve pocket sliding valve style shut off valve.
Compare with present technology, the utility model is owing to directly detect leakage rate, be not subjected to the position of leakage point, middle other element how much, the influence of factors such as pipeline thickness and system pressure fluctuation, thereby reliable in action, accuracy height.In addition, because the utility model is provided with Pilot operated check valve, be equivalent to during this one-way valve opens the shut off valve bypass, make the action flow of hydraulic actuator not be subjected to the quantitative limitation of shut off valve control flows, also be convenient to simultaneously hydraulic actuator resetting or when safeguarding fluid flow to fuel tank.Cut-out reaction when another advantage of the present utility model is leakage is very fast.
Below in conjunction with accompanying drawing content of the present utility model is illustrated:
Fig. 1 is the schematic diagram of the utility model most preferred embodiment.
Fig. 2 is the structure diagram of Fig. 1 interrupt flow valve.
Fig. 3 is the utility unit figure of Fig. 1.
As shown in Figure 1: shut off valve 1, Pilot operated check valve 2 and differential signal-transmitting machine 4 parallel with one another being in the same place, wherein the control mouth of one-way valve 2 is connected with solenoid directional control valve 3.When needs actuator (oil cylinder) 6 actions, control oil channel is connected in solenoid directional control valve 3 energisings, one-way valve 2 is opened, and high-voltage oil liquid flows to the B point from the A point through one-way valve 2, gives actuator's 6 fuel feeding, after actuator's 6 actions were finished and entered packing state, one-way valve 2 was closed in selector valve 3 outages.At this moment, if the leakage rate of actuator 6 and pipeline thereof in the normal scope that allows the time, high-voltage oil liquid can flow to the B point from A point through shut off valve 1, to actuator's 6 additional required fluid of pressurize of keeping; If leakage rate is excessive, promptly actuator 6 is in fault state, and then the flow through shut off valve 1 can surpass control flow rate, and shut off valve 1 will be closed automatically, cuts off the oil feeding line of actuator 6, and signal-transmitting machine 4 sends alarm signal simultaneously.Leakage failure is opened one-way valve 2 shut off valve 1 is resetted after getting rid of.Also be provided with a throttling stop valve 5 in this example between the outlet of shut off valve 1 and fuel tank 7, but its use is that analog system is leaked when debugging, and the control flow rate that shut off valve 1 turn-offs is regulated, throttling stop valve 5 is closed during proper functioning.
Each valve in this example all can adopt existing commercially available prod, wherein shut off valve 1 adopts existing moving valve pocket sliding valve style shut off valve, its structure is as shown in Figure 2: it by valve body 11, connect firmly on valve body and by the spool 12 of through-lumen a, be enclosed within outside the spool 12 and the moving valve pocket 13 of end sealing and the spring 15 that forces on the moving valve pocket are formed, wherein valve core cavity a flows to liquid respectively with body cavity b, exports and link to each other, and is provided with the throttling window c that is communicated with body cavity b and valve core cavity a between spool 12 and moving valve pocket 13.When fluid by inner chamber a when throttling window c flows into inner chamber b, have the pressure loss, thereby on moving valve pocket 13, produce a thrust F1 who makes progress.When through the flow (being leakage rate in this example) of throttling window c hour, thrust F1 is less than spring force F2, and valve pocket 13 is motionless.When the flow through throttling window c surpassed certain value, thrust F1 moved on the valve pocket 13 greater than spring force F2, and the aperture X of throttling window c reduces, and thrust F1 further increases, thereby valve pocket 13 is pushed into the upper limit, and oil circuit is cut off fully.The control flow rate of cutout can be regulated by spring 15.
This example is that above-mentioned each element is installed on the special-purpose manifold block 8 when using, and forms a utility unit, and its structure as shown in Figure 3.
Claims (2)
1, a kind of oil liquid leakage monitoring alarm device that is used under the packing state, it is characterized in that being made up of shut off valve parallel with one another (1), Pilot operated check valve (2) and differential signal-transmitting machine (4), wherein the control mouth of Pilot operated check valve (2) joins by selector valve (3) and pressure oil circuit.
2, oil liquid leakage monitoring alarm device as claimed in claim 1 is characterized in that said shut off valve (1) is moving valve pocket sliding valve style shut off valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97208399 CN2303963Y (en) | 1997-06-23 | 1997-06-23 | Oil-leakage monitoring alarming device for use under pressure-maintaining condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97208399 CN2303963Y (en) | 1997-06-23 | 1997-06-23 | Oil-leakage monitoring alarming device for use under pressure-maintaining condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2303963Y true CN2303963Y (en) | 1999-01-13 |
Family
ID=33927847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97208399 Expired - Fee Related CN2303963Y (en) | 1997-06-23 | 1997-06-23 | Oil-leakage monitoring alarming device for use under pressure-maintaining condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2303963Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533883A (en) * | 2014-12-30 | 2015-04-22 | 中国人民解放军理工大学 | Hydraulic diagnostic device simulating fault of hydraulic system |
| CN104822949A (en) * | 2012-10-19 | 2015-08-05 | 土耳其赫马公司 | System preventing pressured oil leakage to cylinder line in control valve systems with flow divider |
| CN105508349A (en) * | 2016-02-02 | 2016-04-20 | 上海朝田实业股份有限公司 | Emergency cut-off oil duct valve for hydraulic power station |
| CN106286474A (en) * | 2015-06-08 | 2017-01-04 | 佛山市恒力泰机械有限公司 | A kind of leakage automatic judging method of ceramic brick press hydraulic pressurization element |
-
1997
- 1997-06-23 CN CN 97208399 patent/CN2303963Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104822949A (en) * | 2012-10-19 | 2015-08-05 | 土耳其赫马公司 | System preventing pressured oil leakage to cylinder line in control valve systems with flow divider |
| CN104822949B (en) * | 2012-10-19 | 2016-08-17 | 土耳其赫马公司 | The pressurised oil that prevents with flow distributor leaks into the system of control valve cylinder pipe |
| CN104533883A (en) * | 2014-12-30 | 2015-04-22 | 中国人民解放军理工大学 | Hydraulic diagnostic device simulating fault of hydraulic system |
| CN106286474A (en) * | 2015-06-08 | 2017-01-04 | 佛山市恒力泰机械有限公司 | A kind of leakage automatic judging method of ceramic brick press hydraulic pressurization element |
| CN106286474B (en) * | 2015-06-08 | 2018-03-20 | 佛山市恒力泰机械有限公司 | A kind of leakage automatic judging method of ceramic brick press hydraulic pressurization element |
| CN105508349A (en) * | 2016-02-02 | 2016-04-20 | 上海朝田实业股份有限公司 | Emergency cut-off oil duct valve for hydraulic power station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |