Portable device for automatically detecting micro flow for test bed

Abstract

A portable device for automatically detecting micro flow for a test bed comprises a closed collecting box used for collecting leaked oil; a box cover is fixedly mounted above the collecting box; an adapter is installed on the upper surface of the box cover, the upper portion of the adapter extends to a detected oil leakage position through an oil pipe, an oil dripping pipe is installed below the adapter in the box cover, and the lower end of the oil dripping pipe corresponds to an oil receiving opening in the upper portion of the collecting box. A groove favorable for forming oil drops is formed below the oil dripping pipe; and an oil drop detection assembly is mounted on the upper surface of the collecting box corresponding to the oil dropping pipe and is connected with an upper computer. In conclusion, the device not only improves the accuracy and efficiency of oil leakage detection, but also reduces the operation difficulty and cost, and provides an efficient and reliable solution for the performance test and leakage detection of the hydraulic system.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic system test technical field especially relates to a portable automatic detection little flow's device for test bench. BACKGROUND

[0002] Among various test benches of hydraulic system, such as valve test bench, working position test and various oil cylinder performance evaluation, accurate measurement of little flow is often required. Especially in internal leakage test, due to the extremely small leakage, it often appears in the form of dripping, which makes the resolution ability of traditional flowmeter be greatly challenged. Under normal circumstances, these little flows are far below the resolution lower limit of flowmeter, which leads to the failure to accurately obtain the specific data of leakage.

[0003] At present, for the detection of such little flow, the method commonly used in the industry is relatively primitive and has many deficiencies. One common method is to directly measure the oil volume leaked in unit time by using a measuring cup. However, this method is not only cumbersome to operate, but also greatly affected by human factors, such as reading error of measuring cup, loss caused by oil adhesion to cup wall, etc., which greatly reduces the accuracy of the measurement results.

[0004] Another method is to use manual timing drop count, which estimates the leakage by recording the number of oil drops falling in a certain time. However, this method also has significant defects: the error of manual timing is difficult to avoid, and the speed and form of oil drop falling are affected by many factors, such as oil temperature, viscosity, pressure, etc., which greatly reduces the credibility of the estimated results.

[0005] In summary, the current common little flow detection method has obvious deficiencies in operation convenience, accuracy and credibility. Especially when high-precision testing is performed on hydraulic test benches, these defects are particularly prominent, which seriously restricts the accuracy and reliability of the test results.

[0006] Therefore, in view of the measurement problem of little flow in hydraulic test bench, it is urgent to develop a new detection method or device to improve the accuracy and automation of measurement. This new method or device should be able to overcome the limitations of traditional methods, achieve accurate measurement of little flow, and improve the convenience and efficiency of operation, providing strong support for performance testing and leakage detection of hydraulic systems. UTILITY MODEL CONTENT

[0007] In view of the problems existing in the prior art, the utility model provides a portable automatic detection little flow's device for test bench.

[0008] The utility model discloses a portable automatic detection micro -flow's device for test bench, including the closed collection box for collecting leaked oil liquid, the collection box top fixed mounting has the box cover, the upper surface of box cover is installed with the adapter, and the upper portion of adapter extends to the oil leakage position of being detected through the oil pipe, and the below of adapter is installed with the oil dripping pipe in the box cover, and the lower end of oil dripping pipe corresponds the oil inlet of collection box upper portion, the below of oil dripping pipe is equipped with the bevel that is favorable to forming oil drop, and the oil drop detection assembly is installed on the upper surface of collection box corresponding oil dripping pipe position, and the oil drop detection assembly is connected to the host computer.

[0009] Further preferably, the oil drop detection assembly includes a pair of optical fiber sensors and an optical fiber amplifier, the pair of optical fiber sensors includes a transmitting end and a receiving end, the transmitting end and the receiving end are arranged on both sides of the lower end of the oil dripping pipe, so that the oil drop can pass through the detection area of the pair of optical fiber sensors when it falls, the pair of optical fiber sensors detects the change of the optical signal to determine whether the oil drop has passed through the detection area, the pair of optical fiber sensors is connected to the optical fiber amplifier for amplifying the optical signal transmitted in the optical fiber, and the optical fiber amplifier is connected to the host computer.

[0010] Further preferably, the box cover is provided with a viewing window corresponding to the position of the oil dripping pipe, or the box cover is a transparent box cover.

[0011] Further preferably, a perspective tube is sleeved on the oil dripping pipe, and the perspective tube is fixed between the box cover and the collection box.

[0012] Further preferably, the box cover is provided with a quick connector connected to the optical fiber amplifier and the host computer.

[0013] Further preferably, the collection box is provided with an oil discharge port on the side wall or the bottom plate, and a sealing oil plug is installed on the oil discharge port.

[0014] Further preferably, the upper part of the box cover is provided with a handle.

[0015] Further preferably, the model of the pair of optical fiber sensors is FU-A40.

[0016] Further preferably, the model of the optical fiber amplifier is FS-N41P.

[0017] The device and method for automatically detecting micro flow have the advantages and technical effects that: the device and method can significantly improve the accuracy and efficiency of oil leakage detection. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the device.

[0019] In the figure, 1, collecting box; 1-1, oil inlet; 1-2, sealing oil plug; 2, box cover; 2-1, handle; 3, adapter; 4, oil dripping pipe; 4-1, bevel; 5, optical fiber amplifier; 5-1, optical fiber; 5-2, transmitting end; 5-3, receiving end; 6, host computer communication interface; 7, perspective tube. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the device and method for automatically detecting micro flow more clear and explicit, the device and method will be further described in detail below in combination with embodiments. It should be understood that the specific embodiments described herein are only used to explain the device and method for automatically detecting micro flow, and are not used to limit the device and method.

[0021] Please refer to Figure 1The utility model provides a kind of portable automatic detection micro flow's device for test bench, including enclosed collection box 1, for collecting leaked oil liquid;Enclosed design ensures that during the process of collecting oil droplets, external environmental factors (such as air flow, dust, etc.) cannot interfere with the collection process, ensuring the accuracy and reliability of the collected data.The collection box is fixedly installed with box cover 2 above, and the box cover provides a relatively closed and stable working environment for the oil droplet detection assembly and the oil droplet pipe, reducing the influence of external light, temperature, humidity and other changes on the detection accuracy.In addition, the box cover also plays a certain protective role, preventing accidental collisions or contamination from causing damage to the detection device;The upper surface of the box cover is provided with an adapter 3, and the upper part of the adapter extends to the position to be detected through an oil pipe, so that the device can be easily connected with the position to be detected, and smooth transition from the oil leakage source to the oil droplet pipe is realized.The oil pipe serves as a transmission medium, ensuring the stability and continuity of the oil during the flow process, providing a reliable foundation for subsequent oil droplet formation and detection.A droplet pipe 4 is installed below the adapter in the box cover, and the lower end of the droplet pipe corresponds to the oil inlet port 1-1 of the upper part of the collection box;A bevel 4-1 is provided below the droplet pipe to facilitate the formation of oil droplets, and the droplet pipe is a key component for oil droplet formation.The lower end of the droplet pipe corresponds to the oil inlet port of the upper part of the collection box, ensuring that the oil droplets can fall accurately into the collection box.The design of the bevel facilitates the accumulation of oil at the lower end of the droplet pipe and the formation of stable oil droplets, reducing the uncertainty and randomness in the oil droplet formation process and improving the accuracy of the detection.A droplet detection assembly is installed on the upper surface of the collection box corresponding to the position of the droplet pipe, and the droplet detection assembly is connected to a fiber amplifier 5 through an optical fiber 5-1.The droplet detection assembly is the core part of the device, responsible for real-time monitoring and recording of oil droplet drop conditions.Through continuous monitoring by the optical fiber sensor, the droplet detection assembly can accurately capture the moment of oil droplet drop and transmit the data to the host computer for processing and analysis in real time.This design not only improves the degree of automation of detection, but also greatly reduces errors and uncertainties caused by human factors.The powerful data processing capability of the host computer enables the device to accurately count the number of oil droplets and accurately calculate the leakage amount, providing strong support for performance testing and leakage detection of hydraulic systems.

[0022] The host computer plays a key role in control and data processing, and its main functions include the following aspects:

[0023] Data reception and processing: the host computer receives optical signal data from the optical fiber sensor through the fiber amplifier, which reflects the situation of oil droplets passing through the detection area when dropping.The host computer processes the received data, such as filtering, amplification, demodulation, etc., to accurately identify oil droplets and count their number.

[0024] Real-time Display and Recording: The host computer has real-time display function, which can display the number of oil droplets in unit time immediately, so that the operator can intuitively understand the oil leakage situation. At the same time, the host computer can also automatically record and save these data, which is convenient for subsequent analysis and query.

[0025] Parameter Setting and Adjustment: The host computer provides a friendly human-machine interface, allowing the operator to set detection parameters such as counting period, sensitivity, etc. according to actual needs. These settings can be flexibly adjusted to meet the testing needs under different working conditions.

[0026] Automatic Control and Monitoring: The host computer as the control center of the entire detection system can realize the automatic control and monitoring of each hardware module. Through sending control instructions, the host computer can coordinate the normal operation of each component to ensure the accuracy and stability of the detection process.

[0027] Data Analysis and Report Generation: The host computer can also conduct in-depth analysis on the recorded data, such as calculating the average leakage amount and drawing the leakage amount curve. Based on these analyses, the host computer can generate detailed detection reports to provide strong support for the performance evaluation and leakage detection of hydraulic components and systems.

[0028] In this embodiment, the oil droplet detection assembly adopts the following technical scheme. The oil droplet detection assembly includes a pair of light emitting fiber sensor and a fiber amplifier 5. The pair of light emitting fiber sensor includes a transmitting end 5-2 and a receiving end 5-3. The transmitting end and the receiving end are arranged on both sides of the lower end of the oil droplet pipe, so that the oil droplets can pass through the detection area of the pair of light emitting fiber sensor when they fall. The pair of light emitting fiber sensor detects the change of the light signal to determine whether the oil droplets have passed through the detection area. The pair of light emitting fiber sensor is connected to the fiber amplifier through the fiber 5-1, which is used to amplify the light signal transmitted in the fiber. The fiber amplifier is connected to the host computer.

[0029] The oil droplet detection assembly is the core part of the device, which adopts the advanced technical scheme of the light barrier type optical fiber sensor and the optical fiber amplifier. The light barrier type optical fiber sensor is ingeniously arranged on both sides of the lower end of the oil dripping pipe, forming a stable detection area, which can accurately trigger the detection when the oil droplet drops. The light barrier type optical fiber sensor can determine whether the oil droplet passes through the detection area by detecting the change of the optical signal, which has high sensitivity and accuracy. The optical fiber amplifier is responsible for amplifying the optical signal transmitted in the optical fiber, ensuring the intensity and stability of the signal, so that the host computer can receive clear and accurate detection signals. This technical scheme not only realizes accurate and real-time detection of oil droplets, but also greatly improves the automation and convenience of detection. Through the connection with the host computer, the operator can real-time understand the oil droplet dropping situation, take timely measures for processing, and store, query and analyze the detection data, which provides comprehensive and reliable technical support for the performance test and leakage detection of the hydraulic system. This innovative technical scheme makes the device have significant advantages and application value in the field of micro-flow detection of hydraulic test bench.

[0030] Further preferably, a visible window is provided on the box cover corresponding to the position of the oil dripping pipe, or the box cover is a transparent box cover; this design enables the operator to directly observe the formation and dripping process of the oil droplet below the oil dripping pipe, facilitating real-time monitoring of the detection state. At the same time, it also provides convenience for debugging and maintenance, and the operator can quickly confirm the working state of the oil dripping pipe and the oil droplet detection assembly.

[0031] Further preferably, a perspective tube 7 is sleeved on the oil dripping pipe, and the perspective tube is fixed between the box cover and the collection box. The setting of the perspective tube further enhances the visibility of oil droplet detection, ensuring that the oil droplet will not be blocked during the dripping process, thereby improving the accuracy and reliability of the detection. At the same time, the perspective tube also plays a role in protecting the oil dripping pipe and the oil droplet detection assembly, preventing accidental collision or contamination.

[0032] Further preferably, a quick plug connector 6 is provided on the box cover to connect the optical fiber amplifier and the host computer. The design of the quick plug connector makes the connection between the optical fiber amplifier and the host computer more convenient and reliable. The operator can quickly and easily complete the connection and disassembly of the equipment, improving the work efficiency. At the same time, the quick plug connector also ensures the stability and accuracy of signal transmission.

[0033] Further preferably, an oil discharge port is provided on the side wall or bottom plate of the collection box, and a sealed oil plug 1-2 is installed on the oil discharge port. The setting of the oil discharge port enables the oil in the collection box to be easily discharged, and at the same time, it also makes the cleaning and maintenance of the collection box more convenient.

[0034] Further preferably, the upper part of the box cover is provided with a handle 2-1. The design of the handle makes the whole device more convenient to carry and move. The operator can easily lift the device and move it to the position where detection is needed. This design greatly improves the portability and flexibility of the device.

[0035] Further preferably, the model of the fiber-optic sensor is FU-A40.

[0036] Further preferably, the model of the fiber-optic amplifier is FS-N41P

[0037] The utility model discloses still the use method of the device of portable automatic detection little flow, specifically includes the following steps:

[0038] S1, device preparation and connection

[0039] S1.1, device assembly:

[0040] Ensure that the components of the portable automatic detection little flow device are complete and intact, including the closed collection box, the box cover, the adapter, the oil dripping pipe, the oil drop detection assembly and the upper computer;

[0041] Place the collection box in a stable position, and ensure that the box cover is fixedly installed above it;

[0042] Install the adapter on the upper surface of the box cover, and ensure that the upper part of the adapter can extend to the position to be detected through the oil pipe;

[0043] In the box cover, install the oil dripping pipe below the adapter, adjust the position of the oil dripping pipe, so that the lower end of the oil dripping pipe corresponds to the oil inlet port of the upper part of the collection box, and ensure that a bevel for forming oil drops is arranged below the oil dripping pipe;

[0044] S1.2, oil drop detection assembly installation: install the oil drop detection assembly on the upper surface of the collection box corresponding to the position of the oil dripping pipe; ensure that the transmitting end and the receiving end of the fiber-optic sensor are arranged on both sides of the lower end of the oil dripping pipe, so that the oil drops can pass through the detection area when falling; connect the fiber-optic sensor to the fiber-optic amplifier for amplifying the optical signal transmitted in the fiber; finally, connect the fiber-optic amplifier to the upper computer to record and display the number of oil drops;

[0045] S1.3, pipeline connection:

[0046] Fix one end of the oil pipe at the position to be detected, and ensure that the connection is tight and leak-free; connect the other end of the oil pipe to the quick connector of the adapter, and ensure that the connection is firm and the direction is correct;

[0047] S2, device emptying and initialization

[0048] S2.1, emptying operation:

[0049] Before starting the detection, the whole device is evacuated to ensure that there is no residual oil or impurities inside the device;

[0050] During the evacuation process, pay attention to whether there is oil flowing out of the collection box and the oil drain pipe to ensure complete evacuation;

[0051] S2.2, initialization setting:

[0052] Turn on the host computer and enter the detection software interface; according to actual needs, set the detection parameters and counting period (in this example, the counting period is 3-5 minutes); ensure that the communication connection between the host computer and the optical fiber amplifier is normal;

[0053] S3, start detection and counting

[0054] S3.1, start detection: when the oil droplet detection assembly detects oil droplets for the first time, the host computer starts timing after a 30s stabilization time; within 1-3 minutes, observe the host computer interface to ensure that the oil droplet detection assembly is working properly and there is no abnormal alarm.

[0055] S3.2, counting operation:

[0056] When the host computer timing reaches the preset counting period (30s), start automatic counting;

[0057] The host computer will record and display the number of oil droplets in real time, and the operator can view the current counting result through the interface.

[0058] S3.3, data recording and analysis:

[0059] In a counting period, the host computer will automatically save the number of oil droplets; the operator can view the historical data in the host computer to analyze the trend and regularity of oil droplet flow.

[0060] S4, detection end and device maintenance

[0061] S4.1 detection end: when the detection task is completed, close the host computer software interface; disconnect the oil pipe and the adapter, and restore the device to the initial state;

[0062] S4.2 device maintenance: clean and maintain the device, and when the oil in the collection box reaches the set height scale, drain the oil in the collection box.

[0063] The technical effect of the use method of the portable automatic micro-flow detection device is remarkable. First, through detailed step guidance, the operator can quickly and accurately complete the assembly, connection and initialization setting of the device, greatly reducing the operation difficulty and human error. Second, the use method of the device ensures that oil droplets can be stably and reliably detected and recorded, improving the accuracy and efficiency of detection. At the same time, the real-time recording and display function of the upper computer enables the operator to intuitively understand the number of oil droplets, facilitating timely problem discovery and corresponding measures. In summary, the use method not only improves the accuracy and efficiency of oil leakage detection, but also enhances the operability and practicality of the device, providing strong support for performance testing and leakage detection of hydraulic systems.

[0064] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A portable automatic micro-flow detection device for test bench, comprising a closed collection box for collecting leaked oil; a box cover is fixedly installed above the collection box; an adapter is installed on the upper surface of the box cover, the upper part of the adapter extends to the position to be detected through an oil pipe, an oil dripping pipe is installed below the adapter in the box cover, the lower end of the oil dripping pipe corresponds to an oil receiving port on the upper part of the collection box; a bevel for forming oil drops is arranged below the oil dripping pipe; an oil drop detection assembly is installed on the upper surface of the collection box corresponding to the position of the oil dripping pipe, and the oil drop detection assembly is connected to an upper computer.

2. The device for automatically detecting a small flow in a portable manner for a test bench according to claim 1, characterized in that: The oil drop detection assembly comprises a pair of emitting optical fiber sensors and an optical fiber amplifier, the pair of emitting optical fiber sensors comprises a transmitting end and a receiving end, the transmitting end and the receiving end are arranged on both sides of the lower end of the oil dripping pipe, so that the oil drops can pass through the detection area of the pair of emitting optical fiber sensors when the oil drops drop, the pair of emitting optical fiber sensors detects the change of the optical signal to determine whether the oil drops pass through the detection area, the pair of emitting optical fiber sensors is connected to the optical fiber amplifier for amplifying the optical signal transmitted in the optical fiber, and the optical fiber amplifier is connected to the upper computer.

3. The device for automatically detecting a small flow in a portable manner for a test bench according to claim 1, characterized in that: A visible window is arranged on the box cover corresponding to the position of the oil dripping pipe, or the box cover is a transparent box cover.

4. The device for automatically detecting a small flow in a portable manner for a test bench according to claim 1, characterized in that: A perspective tube is sleeved on the oil dripping pipe, and the perspective tube is fixed between the box cover and the collection box.

5. The device for automatically detecting a small flow in a portable manner for a test bench according to claim 1, characterized in that: A quick plug connector for connecting the optical fiber amplifier and the upper computer is arranged on the box cover.

6. The device for automatically detecting a small flow in a portable manner for a test bench according to claim 1, characterized in that: An oil discharge port is arranged on the side wall or the bottom plate of the collection box, and a sealing plug is installed on the oil discharge port.

7. The device for automatically detecting a small flow in a portable state for a test bed according to claim 1, wherein: A handle is arranged on the upper part of the box cover.

8. The device for automatically detecting a small flow in a portable state for a test bed according to claim 1, wherein: The model of the pair of emitting optical fiber sensors is FU-A40.

9. The device for automatically detecting a small flow in a portable state for a test bed according to claim 1, wherein: The model of the optical fiber amplifier is FS-N41P.

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