阅读说明：本技术 一种用于检测液压设备泄漏的方法及装置 (Method and device for detecting leakage of hydraulic equipment ) 是由 乔东博 吴振宪 王杰青 马进峰 张小松 刘玉起 于 2021-01-12 设计创作，主要内容包括：本发明提供了一种用于检测液压设备泄漏的方法及装置,方法包括：在液压设备工作中,获取抱闸供油管路的供油压力；判断供油压力是否达到预设的第一预警压力,当确定供油压力达到第一预警压力时,获得对应的第一时刻；判断供油压力是否达到预设的第二预警压力,当确定供油压力达到第二预警压力时,获得对应的第二时刻；第二预警压力用于检测液压抱闸是否完全打开；根据第一时刻及所述第二时刻判断液压抱闸是否泄漏；如此,相当于是根据供油压力确定抱闸完全打开的时长,进而根据该时长来判断液压抱闸是否发生泄漏,因此可以精确检测出液压抱闸是否发生泄漏,进而能提醒工作人员及时检修,避免液压设备及产线突发停机,确保生产效率。(The invention provides a method and a device for detecting leakage of hydraulic equipment, wherein the method comprises the following steps: acquiring the oil supply pressure of an internal contracting brake oil supply pipeline during the operation of hydraulic equipment; judging whether the oil supply pressure reaches a preset first early warning pressure or not, and obtaining a corresponding first moment when the oil supply pressure is determined to reach the first early warning pressure; judging whether the oil supply pressure reaches a preset second early warning pressure or not, and obtaining a corresponding second moment when the oil supply pressure is determined to reach the second early warning pressure; the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened; judging whether the hydraulic band-type brake leaks or not according to the first moment and the second moment; so, be equivalent to according to fuel feeding pressure and confirm that the band-type brake is long when opening completely, and then judge according to this length whether the hydraulic band-type brake takes place to leak, consequently can the accurate detection go out hydraulic band-type brake whether take place to leak, and then can remind the staff in time to overhaul, avoid hydraulic equipment and produce the proruption and shut down, ensure production efficiency.)

1. A method for detecting a hydraulic device leak, the method comprising:

acquiring the oil supply pressure of an oil supply pipeline of a hydraulic band-type brake during the operation of hydraulic equipment;

judging whether the oil supply pressure reaches a preset first early warning pressure or not, and obtaining a corresponding first moment when the oil supply pressure is determined to reach the first early warning pressure; the first early warning pressure is used for detecting whether the oil supply pipeline is connected or not;

judging whether the oil supply pressure reaches a preset second early warning pressure or not, and obtaining a corresponding second moment when the oil supply pressure is determined to reach the second early warning pressure; the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened;

and judging whether the hydraulic band-type brake leaks or not according to the first moment and the second moment.

2. The method of claim 1, wherein the first forewarning pressure is 10-15 bar.

3. The method of claim 1, wherein the first forewarning pressure is less than the second forewarning pressure.

4. The method according to claim 1, wherein the determining whether the hydraulic band-type brake leaks according to the first time and the second time comprises:

obtaining the current time length between the first time and the second time;

and judging whether the current time length is greater than a preset reference time length or not, and if the current time length is determined to be greater than the reference time length, determining that the hydraulic band-type brake leaks.

5. The method according to claim 1, wherein after determining whether the hydraulic band-type brake is leaked according to the first time and the second time, the method further comprises:

and if the hydraulic band-type brake is determined to leak, outputting an alarm signal.

6. An apparatus for detecting a leak in a hydraulic device, the apparatus comprising:

the acquiring unit is used for acquiring the oil supply pressure of the oil supply pipeline of the hydraulic band-type brake during the operation of the hydraulic equipment;

the first judgment unit is used for judging whether the oil supply pressure reaches a preset first early warning pressure or not, and acquiring a corresponding first moment when the oil supply pressure reaches the first early warning pressure; the first early warning pressure is used for detecting whether the oil supply pipeline is connected or not; judging whether the oil supply pressure reaches a preset second early warning pressure or not, and obtaining a corresponding second moment when the oil supply pressure is determined to reach the second early warning pressure; the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened;

and the second judging unit is used for judging whether the hydraulic band-type brake leaks or not according to the first time and the second time.

7. The apparatus of claim 6, wherein the first warning pressure is 10 to 15 bar.

8. The apparatus of claim 6, wherein the first warning pressure is less than the second warning pressure.

9. The apparatus of claim 6, wherein the second determining unit is specifically configured to:

obtaining the current time length between the first time and the second time;

and judging whether the current time length is greater than a preset reference time length or not, and if the current time length is determined to be greater than the reference time length, determining that the hydraulic band-type brake leaks.

10. The apparatus of claim 6, wherein the apparatus further comprises:

and the output unit is used for outputting an alarm signal when the hydraulic band-type brake is determined to leak.

Technical Field

The invention relates to the technical field of hydraulic braking, in particular to a method and a device for detecting leakage of hydraulic equipment.

Background

Hydraulic equipment is widely used in various fields due to its good performance. In the use process, all parts of the hydraulic equipment need to work normally and are matched with each other to provide power.

The hydraulic band-type brake is one of components of hydraulic equipment, and is usually installed in a hidden position inside a safety cover or inside the equipment along with a coupler or a hydraulic cylinder. In a daily working state, the hidden part cannot be thoroughly checked because the hidden part is positioned, and further whether the hydraulic band-type brake leaks or not cannot be judged.

When the hydraulic band-type brake leaks, the equipment can not play a braking role, the normal action of the hydraulic equipment can be influenced finally, the hydraulic equipment is stopped, the equipment on the production line is stopped suddenly under the condition of no preparation, the damage of other equipment on the production line is caused, and the production efficiency is influenced.

Disclosure of Invention

Aiming at the problems in the prior art, the embodiment of the invention provides a method and a device for detecting leakage of hydraulic equipment, which are used for solving the problems that the leakage condition of a hydraulic band-type brake cannot be detected in the prior art, and the hydraulic equipment is stopped and the production efficiency is reduced when the hydraulic band-type brake leaks.

The invention provides a method for detecting leakage of hydraulic equipment, which comprises the following steps:

acquiring the oil supply pressure of an oil supply pipeline of a hydraulic band-type brake during the operation of hydraulic equipment;

judging whether the oil supply pressure reaches a preset first early warning pressure or not, and obtaining a corresponding first moment when the oil supply pressure is determined to reach the first early warning pressure; the first early warning pressure is used for detecting whether the oil supply pipeline is connected or not;

judging whether the oil supply pressure reaches a preset second early warning pressure or not, and obtaining a corresponding second moment when the oil supply pressure is determined to reach the second early warning pressure; the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened;

and judging whether the hydraulic band-type brake leaks or not according to the first moment and the second moment.

Optionally, the first early warning pressure is 10-15 bar.

Optionally, the first warning pressure is smaller than the second warning pressure.

Optionally, the determining, according to the first time and the second time, whether the hydraulic band-type brake leaks includes:

obtaining the current time length between the first time and the second time;

and judging whether the current time length is greater than a preset reference time length or not, and if the current time length is determined to be greater than the reference time length, determining that the hydraulic band-type brake leaks.

Optionally, after judging whether the hydraulic band-type brake leaks according to the first time and the second time, the method further includes:

and if the hydraulic band-type brake is determined to leak, outputting an alarm signal.

The present invention also provides an apparatus for detecting a leak in a hydraulic device, the apparatus comprising:

the acquiring unit is used for acquiring the oil supply pressure of the oil supply pipeline of the hydraulic band-type brake during the operation of the hydraulic equipment;

the first judgment unit is used for judging whether the oil supply pressure reaches a preset first early warning pressure or not, and acquiring a corresponding first moment when the oil supply pressure reaches the first early warning pressure; the first early warning pressure is used for detecting whether the oil supply pipeline is connected or not; judging whether the oil supply pressure reaches a preset second early warning pressure or not, and obtaining a corresponding second moment when the oil supply pressure is determined to reach the second early warning pressure; the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened;

and the second judging unit is used for judging whether the hydraulic band-type brake leaks or not according to the first time and the second time.

Optionally, the first early warning pressure is 10-15 bar.

Optionally, the first warning pressure is smaller than the second warning pressure.

Optionally, the second judging unit is specifically configured to:

obtaining the current time length between the first time and the second time;

and judging whether the current time length is greater than a preset reference time length or not, and if the current time length is determined to be greater than the reference time length, determining that the hydraulic band-type brake leaks.

Optionally, the apparatus further comprises:

and the output unit is used for outputting an alarm signal when the hydraulic band-type brake is determined to leak.

The invention provides a method and a device for detecting leakage of hydraulic equipment, wherein the method comprises the following steps: acquiring the oil supply pressure of an internal contracting brake oil supply pipeline during the operation of hydraulic equipment; judging whether the oil supply pressure reaches a preset first early warning pressure or not, and obtaining a corresponding first moment when the oil supply pressure is determined to reach the first early warning pressure; the first early warning pressure is used for detecting whether the oil supply pipeline is connected or not; judging whether the oil supply pressure reaches a preset second early warning pressure or not, and obtaining a corresponding second moment when the oil supply pressure is determined to reach the second early warning pressure; the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened; judging whether the hydraulic band-type brake leaks or not according to the first moment and the second moment; so, be equivalent to according to fuel feeding pressure and confirm that the band-type brake is long when opening completely, and then judge according to this length whether the hydraulic band-type brake takes place to leak, consequently can the accurate detection go out hydraulic band-type brake whether take place to leak, and then can remind the staff in time to overhaul, avoid hydraulic equipment and produce the proruption and shut down, ensure production efficiency.

Drawings

FIG. 1 is a schematic flow chart of a method for detecting a leak in a hydraulic device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an apparatus for detecting a leak in a hydraulic device according to an embodiment of the present invention.

Detailed Description

The invention provides a method and a device for detecting leakage of hydraulic equipment, and aims to solve the problems that in the prior art, the leakage condition of a hydraulic band-type brake cannot be detected, hydraulic equipment is stopped when the hydraulic band-type brake leaks, and production efficiency is reduced.

The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.

Example one

The present embodiment provides a method for detecting a leak in a hydraulic apparatus, as shown in fig. 1, the method including:

s110, acquiring oil supply pressure of an oil supply pipeline of the hydraulic band-type brake during the operation of hydraulic equipment;

here, a pressure sensor is installed on the oil supply pipeline of the hydraulic internal contracting brake in advance or a pressure sensor is installed on the hydraulic valve stand, and the oil supply pressure of the oil supply pipeline of the hydraulic internal contracting brake can be obtained in real time by using the pressure sensor during the operation of the hydraulic equipment. When the pressure sensor acquires the oil supply pressure, the oil supply pressure is transmitted to the PLC. Therefore, the PLC can obtain the oil supply pressure of the oil supply pipeline of the hydraulic band-type brake in real time.

S111, judging whether the oil supply pressure reaches a preset first early warning pressure or not, and obtaining a corresponding first moment when the oil supply pressure reaches the first early warning pressure; the first early warning pressure is used for detecting whether the oil supply pipeline is connected or not;

after the oil supply pressure is obtained, whether the oil supply pressure reaches a preset first early warning pressure or not can be judged based on a preset detection period, and the first early warning pressure is used for detecting whether the oil supply pipeline is connected or not. That is, when the fuel supply pressure reaches the first warning pressure, it indicates that the fuel supply line is connected at this time.

And when the oil supply pressure is determined to reach the first early warning pressure, obtaining a corresponding first moment when the first early warning pressure is reached. The first early warning pressure can be 10-15 bar.

Here, the preset detection period may be 1-3 s, and may also be set according to an actual working condition.

S112, judging whether the oil supply pressure reaches a preset second early warning pressure or not, and obtaining a corresponding second moment when the oil supply pressure reaches the second early warning pressure; the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened;

the working principle of the hydraulic band-type brake is that the oil supply pressure of a hydraulic pipeline overcomes the spring force to open the band-type brake piece, so the opening and closing degree of the hydraulic band-type brake is related to the oil supply pressure.

And when the oil supply pipeline is determined to be connected, whether the oil supply pressure reaches a preset second early warning pressure needs to be continuously judged, and when the oil supply pressure reaches the second early warning pressure, a corresponding second moment when the second early warning pressure is reached is obtained, and the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened. That is, when the fuel supply pressure reaches the second warning pressure, it indicates that the hydraulic band-type brake has been fully opened. The second early warning pressure is greater than the first early warning pressure.

The second early warning pressure corresponding to different hydraulic systems is different, so that the second early warning pressure can be determined according to actual working conditions.

And S113, judging whether the hydraulic band-type brake leaks or not according to the first time and the second time.

Normally, the time period for the hydraulic band-type brake to be fully opened is a set time period. However, when the internal sealing component of the hydraulic band-type brake leaks or the pipeline leaks, the oil supply pressure fluctuates, so that the pressure required by opening the hydraulic band-type brake cannot be reached within a set time, and the braking effect cannot be achieved. That is, when the internal sealing component of the hydraulic band-type brake leaks or the pipeline leaks, the hydraulic band-type brake cannot be fully opened within a set time length, or the time length required for full opening exceeds the set time length.

Based on this, when the first time and the second time are obtained, whether the hydraulic band-type brake leaks can be judged according to the first time and the second time.

Specifically, whether hydraulic pressure band-type brake leaks is judged according to first moment and second moment, include:

obtaining the current time length between the first time and the second time;

and judging whether the current time length is greater than a preset reference time length or not, and if the current time length is determined to be greater than the reference time length, determining that the hydraulic band-type brake leaks.

Further, in order to remind the staff in time to overhaul the hydraulic band-type brake, judge whether the hydraulic band-type brake leaks the back according to first moment and second moment, still include:

and if the hydraulic band-type brake is determined to leak, outputting an alarm signal.

Therefore, after the working personnel receives the alarm signal, the working personnel can utilize the equipment parking time or contact the operator to park to check the hydraulic band-type brake, test the action of the hydraulic band-type brake, check whether the hydraulic band-type brake has internal leakage or external leakage conditions and the leakage severity, timely process the hydraulic band-type brake, avoid accidents caused by the fact that the hydraulic equipment is parked under the condition of no preparation, and further avoid the reduction of the production efficiency.

Here, a cold rolling mill is counted, hydraulic equipment cannot brake due to leakage of a hydraulic band-type brake every year, a parking accident caused by the hydraulic equipment is about 10 hours, the profit per ton of steel is 300 yuan, the hourly output is 300t, and the annual benefit can be increased as follows: 10 × 300 × 300 ═ 90 ten thousand yuan.

It can be seen that the method for detecting leakage of hydraulic equipment provided by the embodiment is equivalent to determining the time length for completely opening the internal contracting brake according to the oil supply pressure, and further judging whether the internal contracting brake leaks according to the time length, so that whether the internal contracting brake leaks can be accurately detected, further, a worker can be reminded to overhaul in time, sudden shutdown of the hydraulic equipment and a production line is avoided, the production efficiency is ensured, and loss caused by the sudden shutdown is reduced.

Based on the same inventive concept, the application also provides a device for detecting the leakage of the hydraulic equipment, which is detailed in embodiment II.

Example two

The present embodiment provides an apparatus for detecting a leakage of a hydraulic device, which may be a PLC, as shown in fig. 2, the apparatus including: an acquisition unit 21, a first judgment unit 22, and a second judgment unit 23; wherein the content of the first and second substances,

the acquiring unit 21 is used for acquiring the oil supply pressure of the oil supply pipeline of the hydraulic internal contracting brake during the operation of the hydraulic equipment;

the first judging unit 22 is configured to judge whether the oil supply pressure reaches a preset first warning pressure, and when it is determined that the oil supply pressure reaches the first warning pressure, obtain a corresponding first time; the first early warning pressure is used for detecting whether the oil supply pipeline is connected or not; judging whether the oil supply pressure reaches a preset second early warning pressure or not, and obtaining a corresponding second moment when the oil supply pressure is determined to reach the second early warning pressure; the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened;

and a second judging unit 23, configured to judge whether the hydraulic internal contracting brake leaks according to the first time and the second time.

Here, a pressure sensor is installed on the oil supply pipeline of the hydraulic internal contracting brake in advance or a pressure sensor is installed on the hydraulic valve stand, and the oil supply pressure of the oil supply pipeline of the hydraulic internal contracting brake can be obtained in real time by using the pressure sensor during the operation of the hydraulic equipment. When the pressure sensor acquires the supply pressure, the supply pressure is transmitted to the acquisition unit 21. In this way, the obtaining unit 21 can obtain the oil supply pressure of the hydraulic internal contracting brake oil supply pipeline in real time.

After the oil supply pressure is obtained, the first determining unit 22 may determine whether the oil supply pressure reaches a preset first warning pressure based on a preset detection period, where the first warning pressure is used to detect whether the oil supply line is connected. That is, when the fuel supply pressure reaches the first warning pressure, it indicates that the fuel supply line is connected at this time.

And when the oil supply pressure is determined to reach the first early warning pressure, obtaining a corresponding first moment when the first early warning pressure is reached. The first early warning pressure can be 10-15 bar.

Here, the preset detection period may be 1-3 s, and may also be set according to an actual working condition.

The working principle of the hydraulic band-type brake is that the oil supply pressure of a hydraulic pipeline overcomes the spring force to open the band-type brake piece, so the opening and closing degree of the hydraulic band-type brake is related to the oil supply pressure.

When the oil supply pipeline is determined to be connected, the first judging unit 22 further needs to continuously judge whether the oil supply pressure reaches a preset second early warning pressure, and when the oil supply pressure reaches the second early warning pressure, a corresponding second moment when the second early warning pressure is reached is obtained, and the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened. That is, when the fuel supply pressure reaches the second warning pressure, it indicates that the hydraulic band-type brake has been fully opened. The second early warning pressure is greater than the first early warning pressure.

The second early warning pressure corresponding to different hydraulic systems is different, so that the second early warning pressure can be determined according to actual working conditions.

Normally, the time period for the hydraulic band-type brake to be fully opened is a set time period. However, when the internal sealing component of the hydraulic band-type brake leaks or the pipeline leaks, the oil supply pressure fluctuates, so that the pressure required by opening the hydraulic band-type brake cannot be reached within a set time, and the braking effect cannot be achieved. That is, when the internal sealing component of the hydraulic band-type brake leaks or the pipeline leaks, the hydraulic band-type brake cannot be fully opened within a set time length, or the time length required for full opening exceeds the set time length.

Based on this, when the first time and the second time are acquired, the second determination unit 23 may determine whether the hydraulic band-type brake is leaked or not according to the first time and the second time.

Specifically, the second determining unit 23 determines whether the hydraulic band-type brake leaks according to the first time and the second time, and includes:

obtaining the current time length between the first time and the second time;

and judging whether the current time length is greater than a preset reference time length or not, and if the current time length is determined to be greater than the reference time length, determining that the hydraulic band-type brake leaks.

Further, referring to fig. 2, the apparatus further comprises: the output unit 24 is used for judging whether the hydraulic band-type brake leaks or not according to the first time and the second time in order to remind a worker of overhauling the hydraulic band-type brake in time, and the output unit 24 is used for:

and if the hydraulic band-type brake is determined to leak, outputting an alarm signal.

Therefore, after the working personnel receives the alarm signal, the working personnel can utilize the equipment parking time or contact the operator to park to check the hydraulic band-type brake, test the action of the hydraulic band-type brake, check whether the hydraulic band-type brake has internal leakage or external leakage conditions and the leakage severity, timely process the hydraulic band-type brake, avoid accidents caused by the fact that the hydraulic equipment is parked under the condition of no preparation, and further avoid the reduction of the production efficiency.

Here, a cold rolling mill is counted, hydraulic equipment cannot brake due to leakage of a hydraulic band-type brake every year, a parking accident caused by the hydraulic equipment is about 10 hours, the profit per ton of steel is 300 yuan, the hourly output is 300t, and the annual benefit can be increased as follows: 10 × 300 × 300 ═ 90 ten thousand yuan.

It can be seen that the method for detecting leakage of hydraulic equipment provided by the embodiment is equivalent to determining the time length for completely opening the internal contracting brake according to the oil supply pressure, and further judging whether the internal contracting brake leaks according to the time length, so that whether the internal contracting brake leaks can be accurately detected, further, a worker can be reminded to overhaul in time, sudden shutdown of the hydraulic equipment and a production line is avoided, the production efficiency is ensured, and loss caused by the sudden shutdown is reduced.

The method and the device for detecting the leakage of the hydraulic equipment provided by the embodiment of the invention have the beneficial effects that at least:

the invention provides a method and a device for detecting leakage of hydraulic equipment, wherein the method comprises the following steps: acquiring the oil supply pressure of an internal contracting brake oil supply pipeline during the operation of hydraulic equipment; judging whether the oil supply pressure reaches a preset first early warning pressure or not, and obtaining a corresponding first moment when the oil supply pressure is determined to reach the first early warning pressure; the first early warning pressure is used for detecting whether the oil supply pipeline is connected or not; judging whether the oil supply pressure reaches a preset second early warning pressure or not, and obtaining a corresponding second moment when the oil supply pressure is determined to reach the second early warning pressure; the second early warning pressure is used for detecting whether the hydraulic band-type brake is completely opened; judging whether the hydraulic band-type brake leaks or not according to the first moment and the second moment; so, be equivalent to according to fuel feeding pressure confirm the time length that the band-type brake was opened completely, and then judge according to this time length whether the hydraulic band-type brake takes place to leak, consequently can the accurate detection go out hydraulic band-type brake whether take place to leak, and then can remind the staff in time to overhaul, avoid hydraulic equipment and produce the proruption and shut down, ensure production efficiency, avoid production loss.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.