CN112880918B - Method and device for detecting leakage of hydraulic equipment - Google Patents
Method and device for detecting leakage of hydraulic equipment Download PDFInfo
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- CN112880918B CN112880918B CN202110036671.3A CN202110036671A CN112880918B CN 112880918 B CN112880918 B CN 112880918B CN 202110036671 A CN202110036671 A CN 202110036671A CN 112880918 B CN112880918 B CN 112880918B
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- type brake
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention provides a method and a device for detecting leakage of hydraulic equipment, wherein the method comprises the following steps: in the working of hydraulic equipment, acquiring the oil supply pressure of an oil supply pipeline of a band-type brake; judging whether the oil supply pressure reaches a preset first early warning pressure, 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, 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; therefore, the hydraulic band-type brake is equivalent to the time length of determining the complete opening of the band-type brake according to the oil supply pressure, and whether the hydraulic band-type brake leaks or not is judged according to the time length, so that whether the hydraulic band-type brake leaks or not can be accurately detected, workers can be reminded of timely overhauling, sudden shutdown of hydraulic equipment and a production line is avoided, and production efficiency is ensured.
Description
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 devices are widely used in various fields due to their 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 the components of the hydraulic equipment, and is usually installed in a concealed position inside a safety cover or inside the equipment together with a coupler or a hydraulic cylinder. Under the daily working condition, the hydraulic band-type brake is in a hidden position, so that the hydraulic band-type brake cannot be thoroughly checked, and whether the hydraulic band-type brake leaks or not cannot be judged.
When the hydraulic band-type brake leaks, the equipment cannot play a braking role, and finally normal action of the hydraulic equipment can be influenced, so that the hydraulic equipment is stopped, the equipment on the production line is stopped suddenly under the condition of no preparation, damage to other equipment on the production line is caused, and meanwhile, the production efficiency can be influenced.
Disclosure of Invention
Aiming at the problems existing 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 when the hydraulic band-type brake is leaked, the hydraulic equipment is stopped, so that the production efficiency is reduced.
The present invention provides a method for detecting leakage of a hydraulic device, the method comprising:
in the working process of hydraulic equipment, acquiring the oil supply pressure of an oil supply pipeline of a hydraulic band-type brake;
judging whether the oil supply pressure reaches a preset first early warning pressure, 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, 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.
Optionally, the first early warning pressure is 10-15 bar.
Optionally, the first pre-warning pressure is smaller than the second pre-warning pressure.
Optionally, the judging whether the hydraulic band-type brake leaks according to the first time and the second time includes:
obtaining the current time length between the first time and the second time;
judging whether the current time length is longer than a preset reference time length, and if the current time length is longer 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 moment and the second moment, the method further includes:
and outputting an alarm signal if the hydraulic band-type brake is determined to leak.
The present invention also provides an apparatus for detecting leakage of a hydraulic device, the apparatus comprising:
the acquisition unit acquires the oil supply pressure of the oil supply pipeline of the hydraulic band-type brake in the working process of the hydraulic equipment;
the first judging unit is used for judging whether the oil supply pressure reaches a preset first early warning pressure, 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, 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 moment and the second moment.
Optionally, the first early warning pressure is 10-15 bar.
Optionally, the first pre-warning pressure is smaller than the second pre-warning pressure.
Optionally, the second judging unit is specifically configured to:
obtaining the current time length between the first time and the second time;
judging whether the current time length is longer than a preset reference time length, and if the current time length is longer than the reference time length, determining that the hydraulic band-type brake leaks.
Optionally, the apparatus further includes:
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: in the working of hydraulic equipment, acquiring the oil supply pressure of an oil supply pipeline of a band-type brake; judging whether the oil supply pressure reaches a preset first early warning pressure, 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, 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; therefore, the hydraulic band-type brake is equivalent to the time length of determining the complete opening of the band-type brake according to the oil supply pressure, and whether the hydraulic band-type brake leaks or not is judged according to the time length, so that whether the hydraulic band-type brake leaks or not can be accurately detected, workers can be reminded of timely overhauling, sudden shutdown of hydraulic equipment and a production line is avoided, and production efficiency is ensured.
Drawings
FIG. 1 is a schematic flow diagram of a method for detecting leakage of hydraulic equipment according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an apparatus for detecting leakage of hydraulic equipment according to an embodiment of the present invention.
Detailed Description
In order to solve the problem that the leakage condition of the hydraulic band-type brake cannot be detected in the prior art, and hydraulic equipment is stopped when the hydraulic band-type brake is leaked, and the production efficiency is reduced, the invention provides a method and a device for detecting the leakage of the hydraulic equipment.
The technical scheme of the invention is further described in detail through the attached drawings and specific embodiments.
Example 1
The present embodiment provides a method for detecting leakage of a hydraulic device, as shown in fig. 1, the method including:
s110, acquiring the oil supply pressure of an oil supply pipeline of the hydraulic band-type brake in the working process of hydraulic equipment;
here, the pressure sensor is arranged on the oil supply pipeline of the hydraulic band-type brake in advance or the pressure sensor is arranged on the hydraulic valve table, and in the working process of hydraulic equipment, the pressure sensor can be utilized to acquire the oil supply pressure of the oil supply pipeline of the hydraulic band-type brake in real time. When the pressure sensor acquires the oil supply pressure, the oil supply pressure is transmitted to the programmable logic controller PLC. Thus, the PLC can acquire 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, 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;
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 oil supply pressure reaches the first warning pressure, it is indicated that the oil supply line has been connected at this time.
When the oil supply pressure is determined to reach the first early warning pressure, a first moment corresponding to the first early warning pressure is obtained. The first early warning pressure can be 10-15 bar.
Here, the preset detection period may be 1 to 3s, or may be set according to an actual working condition.
S112, judging whether the oil supply pressure reaches a preset second early warning pressure, 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;
because the hydraulic band-type brake working principle is that the band-type brake sheets are opened by overcoming the spring force through the oil supply pressure of the hydraulic pipeline, 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, whether the oil supply pressure reaches a preset second early warning pressure is further required to be continuously judged, when the oil supply pressure reaches the second early warning pressure, a second moment corresponding to the second early warning pressure 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 oil supply pressure reaches the second warning pressure, the hydraulic band-type brake is indicated to be fully opened. The second warning pressure is greater than the first warning pressure.
The second pre-warning pressures corresponding to different hydraulic systems are different, so that the second pre-warning pressures can be determined according to actual working conditions.
And S113, judging whether the hydraulic band-type brake leaks or not according to the first moment and the second moment.
Normally, the hydraulic band-type brake is fully opened for a predetermined period of time. 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 period of time, and the braking effect cannot be achieved. That is, when the internal sealing member of the hydraulic band-type brake leaks or the pipeline leaks, the hydraulic band-type brake cannot be fully opened within a predetermined period of time, or the period of time required for fully opening exceeds the predetermined period of time.
Based on the above, when the first time and the second time are acquired, whether the hydraulic band-type brake leaks or not can be judged according to the first time and the second time.
Specifically, judging whether the hydraulic band-type brake leaks according to the first moment and the second moment, including:
obtaining the current time length between the first time and the second time;
judging whether the current time length is longer than a preset reference time length, and if the current time length is longer than the reference time length, determining that the hydraulic band-type brake leaks.
Further, in order to remind the staff in time to overhaul hydraulic band-type brake, judge whether hydraulic band-type brake leaks the back according to first moment and second moment, still include:
and outputting an alarm signal if the hydraulic band-type brake is determined to leak.
Like this, after the staff received alarm signal, can utilize equipment parking time or contact operating personnel to park and inspect hydraulic band-type brake, test hydraulic band-type brake action, whether the check hydraulic band-type brake exists and leaks the condition and leak the severity of leakage outward, in time handle hydraulic band-type brake, avoid hydraulic equipment to park under the condition of not having the preparation and cause the accident, and then avoid production efficiency to descend.
Here, counting a cold rolling mill, the hydraulic equipment can not brake due to leakage of the hydraulic band-type brake every year, the parking accident is about 10 hours, the profit per ton of steel is 300 yuan, the hour yield 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 of the complete opening of the band-type brake according to the oil supply pressure, and further judging whether the hydraulic band-type brake is leaked according to the time length, so that whether the hydraulic band-type brake is leaked can be accurately detected, further workers can be reminded of timely maintenance, sudden shutdown of the hydraulic equipment and a production line is avoided, production efficiency is ensured, and loss caused by sudden shutdown is reduced.
Based on the same inventive concept, the present application also provides a device for detecting leakage of hydraulic equipment, see in detail embodiment two.
Example two
The present embodiment provides an apparatus for detecting leakage of hydraulic equipment, which may be a PLC, as shown in fig. 2, including: an acquisition unit 21, a first judgment unit 22, and a second judgment unit 23; wherein, the liquid crystal display device comprises a liquid crystal display device,
an acquisition unit 21 for acquiring an oil supply pressure of an oil supply pipeline of the hydraulic band-type brake in the operation of the hydraulic equipment;
a first judging unit 22, configured to judge whether the oil supply pressure reaches a preset first early warning pressure, and obtain a corresponding first moment when it is determined that 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, 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 23 is configured to judge whether the hydraulic band-type brake leaks according to the first time and the second time.
Here, the pressure sensor is arranged on the oil supply pipeline of the hydraulic band-type brake in advance or the pressure sensor is arranged on the hydraulic valve table, and in the working process of hydraulic equipment, the pressure sensor can be utilized to acquire the oil supply pressure of the oil supply pipeline of the hydraulic band-type brake in real time. When the pressure sensor acquires the oil supply pressure, the oil supply pressure is transmitted to the acquisition unit 21. Thus, the acquiring unit 21 can acquire the oil supply pressure of the oil supply pipeline of the hydraulic band-type brake in real time.
After the oil supply pressure is obtained, the first judging unit 22 may judge 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 oil supply pressure reaches the first warning pressure, it is indicated that the oil supply line has been connected at this time.
When the oil supply pressure is determined to reach the first early warning pressure, a first moment corresponding to the first early warning pressure is obtained. The first early warning pressure can be 10-15 bar.
Here, the preset detection period may be 1 to 3s, or may be set according to an actual working condition.
Because the hydraulic band-type brake working principle is that the band-type brake sheets are opened by overcoming the spring force through the oil supply pressure of the hydraulic pipeline, the opening and closing degree of the hydraulic band-type brake is related to the oil supply pressure.
When it is determined that the oil supply line has been connected, the first determining unit 22 further needs to continuously determine whether the oil supply pressure reaches a preset second early warning pressure, and when it is determined that the oil supply pressure reaches the second early warning pressure, a second moment corresponding to the second early warning pressure is obtained, where the second early warning pressure is used for detecting whether the hydraulic band-type brake is fully opened. That is, when the oil supply pressure reaches the second warning pressure, the hydraulic band-type brake is indicated to be fully opened. The second warning pressure is greater than the first warning pressure.
The second pre-warning pressures corresponding to different hydraulic systems are different, so that the second pre-warning pressures can be determined according to actual working conditions.
Normally, the hydraulic band-type brake is fully opened for a predetermined period of time. 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 period of time, and the braking effect cannot be achieved. That is, when the internal sealing member of the hydraulic band-type brake leaks or the pipeline leaks, the hydraulic band-type brake cannot be fully opened within a predetermined period of time, or the period of time required for fully opening exceeds the predetermined period of time.
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 leaks according to the first time and the second time.
Specifically, the second judging unit 23 judges whether the hydraulic band-type brake leaks according to the first time and the second time, including:
obtaining the current time length between the first time and the second time;
judging whether the current time length is longer than a preset reference time length, and if the current time length is longer than the reference time length, determining that the hydraulic band-type brake leaks.
Further, referring to fig. 2, the apparatus further includes: the output unit 24, in order to prompt the staff to overhaul the hydraulic band-type brake in time, after judging whether the hydraulic band-type brake leaks according to the first moment and the second moment, the output unit 24 is used for:
and outputting an alarm signal if the hydraulic band-type brake is determined to leak.
Like this, after the staff received alarm signal, can utilize equipment parking time or contact operating personnel to park and inspect hydraulic band-type brake, test hydraulic band-type brake action, whether the check hydraulic band-type brake exists and leaks the condition and leak the severity of leakage outward, in time handle hydraulic band-type brake, avoid hydraulic equipment to park under the condition of not having the preparation and cause the accident, and then avoid production efficiency to descend.
Here, counting a cold rolling mill, the hydraulic equipment can not brake due to leakage of the hydraulic band-type brake every year, the parking accident is about 10 hours, the profit per ton of steel is 300 yuan, the hour yield 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 of the complete opening of the band-type brake according to the oil supply pressure, and further judging whether the hydraulic band-type brake is leaked according to the time length, so that whether the hydraulic band-type brake is leaked can be accurately detected, further workers can be reminded of timely maintenance, sudden shutdown of the hydraulic equipment and a production line is avoided, production efficiency is ensured, and loss caused by sudden shutdown is reduced.
The method and the device for detecting the leakage of the hydraulic equipment have the advantages that:
the invention provides a method and a device for detecting leakage of hydraulic equipment, wherein the method comprises the following steps: in the working of hydraulic equipment, acquiring the oil supply pressure of an oil supply pipeline of a band-type brake; judging whether the oil supply pressure reaches a preset first early warning pressure, 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, 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; therefore, the hydraulic band-type brake is equivalent to the time length of determining the complete opening of the band-type brake according to the oil supply pressure, and whether the hydraulic band-type brake leaks or not is judged according to the time length, so that whether the hydraulic band-type brake leaks or not can be accurately detected, workers can be reminded of timely overhauling, sudden shutdown of hydraulic equipment and a production line is avoided, production efficiency is ensured, and production loss is avoided.
The above description is not intended to limit the scope of the invention, but is intended to cover any modifications, equivalents, and improvements within the spirit and principles of the invention.
Claims (7)
1. A method for detecting a leak in a hydraulic device, the method comprising:
in the working of hydraulic equipment, acquiring the oil supply pressure of an oil supply pipeline of a hydraulic band-type brake in real time;
judging whether the oil supply pressure reaches a preset first early warning pressure, 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, 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 according to the first moment and the second moment, including:
obtaining the current time length between the first time and the second time;
judging whether the current time length is longer than a preset reference time length, and if the current time length is longer than the reference time length, determining that the hydraulic band-type brake leaks;
judging whether the hydraulic band-type brake leaks according to the first moment and the second moment, and further comprising:
if the hydraulic band-type brake is determined to leak, outputting an alarm signal;
after receiving the alarm signal, a worker checks the hydraulic band-type brake by using equipment parking time or contacting with the parking of the operator, tests the action of the hydraulic band-type brake, checks whether the hydraulic band-type brake has internal leakage and/or external leakage, and if the hydraulic band-type brake has internal leakage and/or external leakage, checks the severity of leakage and timely processes the hydraulic band-type brake.
2. The method of claim 1, wherein the first warning pressure is 10-15 bar.
3. The method of claim 1, wherein the first warning pressure is less than the second warning pressure.
4. An apparatus for detecting leakage of a hydraulic device, the apparatus comprising:
the acquisition unit acquires the oil supply pressure of the oil supply pipeline of the hydraulic band-type brake in the working process of the hydraulic equipment;
the first judging unit is used for judging whether the oil supply pressure reaches a preset first early warning pressure, 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, 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;
the second judging unit is configured to judge whether the hydraulic band-type brake leaks according to the first time and the second time, and specifically includes:
obtaining the current time length between the first time and the second time;
judging whether the current time length is longer than a preset reference time length, and if the current time length is longer than the reference time length, determining that the hydraulic band-type brake leaks.
5. The device of claim 4, wherein the first warning pressure is 10-15 bar.
6. The apparatus of claim 4, wherein the first warning pressure is less than the second warning pressure.
7. The apparatus of claim 4, 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.
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| CN202110036671.3A CN112880918B (en) | 2021-01-12 | 2021-01-12 | Method and device for detecting leakage of hydraulic equipment |
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| CN202110036671.3A CN112880918B (en) | 2021-01-12 | 2021-01-12 | Method and device for detecting leakage of hydraulic equipment |
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