CN201714747U - Alarm device for hydraulic flow - Google Patents
Alarm device for hydraulic flow Download PDFInfo
- Publication number
- CN201714747U CN201714747U CN2010202302592U CN201020230259U CN201714747U CN 201714747 U CN201714747 U CN 201714747U CN 2010202302592 U CN2010202302592 U CN 2010202302592U CN 201020230259 U CN201020230259 U CN 201020230259U CN 201714747 U CN201714747 U CN 201714747U
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- fuel
- displaced
- alarm
- hydraulic system
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Abstract
The utility model discloses an alarm device for hydraulic flow which is disposed on a hydraulic system and is connected to a host PLC, so constructed that the alarm device comprises a first flowmeter and a second flowmeter which are respectively arranged on a fuel return manifold and a fuel-displaced manifold on the hydraulic system, the two flowmeters being connected to the host PLC respectively through a single transmitter whereby fuel return flow and the fuel-displaced flow that have been obtained by real time measuring are transmitted and subsequently are sent to the host PLC. The host PLC shall compare the received difference between fuel return flow signal and the fuel-displaced flow signal with a set value and consequently sends alarm signal based on the comparison. An alarm which is connected to the host PLC will receive the alarm signal sent by the host PLC and send the alarm.
Description
Technical field
The utility model relates to a kind of warning device, relates in particular to a kind of warning device of monitoring hydraulic system.
Background technique
Hydraulic system is made of hydraulic power supply, control valve platform and actuator etc., and the fluid in the oil hydraulic cylinder is delivered to control valve platform through pipeline with pressure oil through hydraulic power supply, the action of conversion actuator, and fluid is got back to fuel tank through return tube again, constitutes hydraulic system.
In order to monitor the working procedure of above-mentioned hydraulic system, prevent leakage of oil, existing hydraulic system warning device is provided with the level meter 1 that shows the liquid level indication as shown in Figure 1, as the electric contact thermometer 2 of oily temperature alarm device, as the pressure gauge with electric contact 3 and the safety valve 4 of oil pressure alarm device.Wherein, level meter 1 can intuitively show the oil storage situation of fuel tank; The actual service conditions of 2 pairs of oil temperature of electric contact thermometer is judged warning; Oil pressure alarm device is installed in the fuel tank bottom, just converts the liquid level in the fuel tank to oil pressure, and the fluid in the fuel tank is carried out the highest, minimum liquid level warning.
Yet the using effect of above-mentioned alarm monitoring device in the practice process is unsatisfactory, and this is because whole hydraulic system is a kind of locking system, and under the general state, the loss amount that does not have oily loss or oil is less.If a small amount of oil loss is arranged, carry out irregularly artificial repairing by recharging oil device, can not influence the normal use of milling equipment, can not cause the situation that stops production of producing yet.But because of actuator appears in production scene sometimes, damage as hydraulic cylinder sealing, oil pipe explosion or some other beyond thought situation take place, will cause a large amount of pressure oil ejection of moment, because being easy to of having of oil spout position seen, what have can't see intuitively, and existing liquid level indication and oil pressure alarm device can not reflect the damaed cordition that on-the-spot oil pipe explosion is produced immediately, treat that oil leakage phenomenon shows by display unit such as liquid level indications, when sending liquid level warning by the prior oil pressure warning device again, caused a large amount of fluid to run off, can stop Rolling Production when serious, cause production defective or equipment is impaired.
Summary of the invention
The purpose of this utility model provides a kind of hydraulic flow warning device, this device can solve existing warning device to the insensitive problem of instantaneous leakage of oil, when the oil pipe explosion appears in hydraulic system or occur than the large pipeline leakage of oil, can in time send caution, being convenient to operator in time takes measures, reduce oil leakage loss, improve environmental condition, reduce leakage of oil the influence of production and the possibility of device damage.This device can also reflect the various unusual oily damage of hydraulic system immediately in addition, and so that whole hydraulic system is monitored, the while detection-phase is with oil mass and use oil consumption.
In order to realize the foregoing invention purpose, the utility model provides a kind of hydraulic flow warning device, is located on the hydraulic system, is connected with a upper PLC, and described warning device comprises:
The first flow meter, be located on the oil return house steward of described hydraulic system, described first flow meter is connected with described upper PLC by a signal transmitting device, the oil return flow that records in real time is converted to the oil return flux signal by described signal transmitting device after, transfer to upper PLC;
Second flowmeter, be located on the fuel-displaced house steward of described hydraulic system, described second flowmeter is connected with described upper PLC by another signal transmitting device, the fuel-displaced flow that records in real time is converted to fuel-displaced flux signal by described another signal transmitting device after, transfer to upper PLC;
Described upper PLC receives described oil return flux signal and fuel-displaced flux signal, and the difference and a setting value of oil return flux signal and fuel-displaced flux signal compared, and sends alarm signal according to comparative result;
One alarm is connected with described upper PLC, receives the alarm signal that upper PLC sends.
In this warning device, be located at the cover of two on fuel-displaced house steward of hydraulic system and oil return house steward flowmeter respectively, gather the fuel-displaced flow and the oil return flow of this hydraulic system respectively, by the signal transmitting device flow is converted to electrical signal respectively then, be sent to upper PLC, upper PLC is by calculating the difference of fuel-displaced flow and oil return flow, and can draw the conclusion whether hydraulic system leakage of oil takes place: when hydraulic system was no abnormal, difference in flow was 0 or one definite value less than setting value; When hydraulic system a large amount of fluid occur and overflows, difference in flow generation significant change, during simultaneously greater than setting value, this moment, upper PLC sent alarm signal to alarm, alarm receives the report for police service and carries out vision or sound alarm behind the signal, perhaps reports to the police by other modes that can cause that operator note.
Preferably, the described first flow meter and second flowmeter are electromagnetic flowmeter.
Preferably, described hydraulic flow warning device also comprises a display device, is connected with described upper PLC.
Because electromagnetic flowmeter has demonstration, record, integrating, controls and function such as adjusting automatically, therefore electromagnetic flowmeter can cooperate the realization hydraulic system with upper PLC in a period of time, the integrated flow of oil inlet pipe and oil outlet tube, thus judge system's leakage of oil and use oil consumption.This judgement and result of calculation show by display device.
The utility model is by adopting technique scheme; make this hydraulic flow warning device be different from existing alarm monitoring device is only taked various state-detection and state protection around fuel tank mode fully; but with whole hydraulic system as monitoring target; realized monitoring the conversion of system monitoring from point; though therefore this warning device is simple in structure; but can improve the hydraulic system monitoring accuracy greatly; improve monitoring efficient; simultaneously in explosion of hydraulic system generation oil pipe and the unusual or fault state that occurs than the large pipeline leakage of oil; immediately send warning to operator; so that operator in time take measures, reduce the loss of hydraulic oil.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation of existing hydraulic system warning device.
Fig. 2 is for being located at the structural representation of the hydraulic flow warning device on the hydraulic system in a kind of exemplary embodiments of the present utility model.
Embodiment
Should be appreciated that present embodiment only is a kind of exemplary embodiment of hydraulic flow warning device described in the utility model, not as restriction to the described technological scheme of present embodiment.
As shown in Figure 2, hydraulic flow warning device described in the utility model is located on the existing hydraulic system.Hydraulic system comprises fuel tank 15 and as the oil hydraulic pump 5 of power mechanism, and actuator, oil return house steward 7 is connected with fuel tank 15 respectively with fuel-displaced house steward 6, level meter 1 is located on the fuel tank 15, be used to show the oil level height, electric contact thermometer 2 is oily temperature alarm devices, and pressure gauge with electric contact 3 is oil pressure alarm devices, and safety valve 4 is located on the fuel tank 15.Electromagnetic flowmeter 8 is located on the oil return house steward 7, measures the oil return flow in real time, and transmitting measured values is arrived connected signal transmitting device 10, after signal transmitting device 10 is converted to the oil return flux signal, transfers to connected upper PLC12 again; Electromagnetic flowmeter 9 is located on the fuel-displaced house steward 6, measures fuel-displaced flow in real time, and transmitting measured values is arrived connected signal transmitting device 11, after signal transmitting device 11 is converted to fuel-displaced flux signal, transfers to connected upper PLC12 again.In addition, display device 13 is connected with upper PLC respectively with alarm 14.
In this warning device, be located at the electromagnetic flowmeter 8,9 on fuel-displaced house steward 6 of hydraulic system and the oil return house steward 7 respectively, gather the fuel-displaced flow Q1 and the oil return flow Q2 of this hydraulic system respectively, by signal transmitting device 10,11 flow is converted to electrical signal respectively then, be sent to upper PLC12, upper PLC12 is by calculating the difference DELTA Q of fuel-displaced flow Q1 and oil return flow Q2, can draw the conclusion whether hydraulic system leakage of oil takes place: when hydraulic system is no abnormal, difference in flow Δ Q is 0 or less than setting value, this setting value can be regulated as required; When hydraulic system a large amount of fluid occurred and overflows, significant change took place in difference in flow Δ Q, and upper PLC12 sends alarm signal to alarm 14 at this moment, and alarm 14 receives the report for police service and reports to the police behind the signal.Fuel-displaced in addition flow Q1, oil return flow Q2 and difference DELTA Q thereof can also send to display device 13 by upper PLC12, and operator can understand hydraulic leak in real time or use oil consumption by display device 13.
This shows; hydraulic flow warning device described in the utility model is applicable to existing hydraulic system; it does not change the method for operation of original equipment; kept of detection and the protection of original various element simultaneously to system's fuel tank; the testing result of two flowmeters can reflect the difference in flow of system in real time; overcome the trueness error of Detecting element self simultaneously; with systematic error unexpected explosion of oil pipe and the bigger phenomenon of pipeline leakage of oil amount are detected judgement; this mode is on the basis of original warning of system and protection; the time of failure judgement shifts to an earlier date greatly, the loss of fluid when having reduced fault.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model the above embodiment's variation, modification.
Claims (3)
1. a hydraulic flow warning device is located on the hydraulic system, is connected with a upper PLC, it is characterized in that comprising:
The first flow meter, be located on the oil return house steward of described hydraulic system, described first flow meter is connected with described upper PLC by a signal transmitting device, the oil return flow that records in real time is converted to the oil return flux signal by described signal transmitting device after, transfer to upper PLC;
Second flowmeter, be located on the fuel-displaced house steward of described hydraulic system, described second flowmeter is connected with described upper PLC by another signal transmitting device, the fuel-displaced flow that records in real time is converted to fuel-displaced flux signal by described another signal transmitting device after, transfer to upper PLC;
Described upper PLC receives described oil return flux signal and fuel-displaced flux signal, and the difference and a setting value of oil return flux signal and fuel-displaced flux signal compared, and sends alarm signal according to comparative result;
One alarm is connected with described upper PLC, receives the alarm signal that upper PLC sends.
2. hydraulic flow warning device as claimed in claim 1 is characterized in that, also comprises a display device, is connected with described upper PLC.
3. hydraulic flow warning device as claimed in claim 1 is characterized in that, the described first flow meter and second flowmeter are electromagnetic flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202302592U CN201714747U (en) | 2010-06-13 | 2010-06-13 | Alarm device for hydraulic flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202302592U CN201714747U (en) | 2010-06-13 | 2010-06-13 | Alarm device for hydraulic flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201714747U true CN201714747U (en) | 2011-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202302592U Expired - Fee Related CN201714747U (en) | 2010-06-13 | 2010-06-13 | Alarm device for hydraulic flow |
Country Status (1)
| Country | Link |
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| CN (1) | CN201714747U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303420A (en) * | 2011-09-20 | 2012-01-04 | 天津市天锻压力机有限公司 | Method for monitoring liquid level of hydraulic press by using plug-in analog quantity liquid level sensor |
| CN102927343A (en) * | 2012-11-07 | 2013-02-13 | 昆山北极光电子科技有限公司 | Dynamic flow on-line detecting system |
| CN103321635A (en) * | 2013-06-09 | 2013-09-25 | 中煤矿山建设集团有限责任公司 | Brine leakage accurate alarm system for freezers |
| CN107710089A (en) * | 2015-06-22 | 2018-02-16 | 株式会社日立制作所 | Shop equipment diagnostic device and shop equipment diagnostic method |
| CN112027923A (en) * | 2020-09-16 | 2020-12-04 | 湖南三一中型起重机械有限公司 | Oil consumption alarm method and device and crane |
| CN113294406A (en) * | 2020-02-21 | 2021-08-24 | 北京福田康明斯发动机有限公司 | Hydraulic cylinder state monitoring system and method and hydraulic clamp system |
-
2010
- 2010-06-13 CN CN2010202302592U patent/CN201714747U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303420A (en) * | 2011-09-20 | 2012-01-04 | 天津市天锻压力机有限公司 | Method for monitoring liquid level of hydraulic press by using plug-in analog quantity liquid level sensor |
| CN102927343A (en) * | 2012-11-07 | 2013-02-13 | 昆山北极光电子科技有限公司 | Dynamic flow on-line detecting system |
| CN103321635A (en) * | 2013-06-09 | 2013-09-25 | 中煤矿山建设集团有限责任公司 | Brine leakage accurate alarm system for freezers |
| CN103321635B (en) * | 2013-06-09 | 2016-06-15 | 中煤矿山建设集团有限责任公司 | A kind of accurate warning of freezing apparatus saline leakage |
| CN107710089A (en) * | 2015-06-22 | 2018-02-16 | 株式会社日立制作所 | Shop equipment diagnostic device and shop equipment diagnostic method |
| CN113294406A (en) * | 2020-02-21 | 2021-08-24 | 北京福田康明斯发动机有限公司 | Hydraulic cylinder state monitoring system and method and hydraulic clamp system |
| CN112027923A (en) * | 2020-09-16 | 2020-12-04 | 湖南三一中型起重机械有限公司 | Oil consumption alarm method and device and crane |
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Legal Events
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110119 Termination date: 20160613 |