CN103217261A - Online detection method and device for leakage of hydraulic pipeline - Google Patents
Online detection method and device for leakage of hydraulic pipeline Download PDFInfo
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Abstract
本发明涉及液压传动领域，尤其涉及一种液压管路泄漏的在线检测方法及装置，其特征在于，对液压缸的进油量进行计量，以液压缸合格时的进油量为基准，实时判断进油量与基准值的差值，作为液压缸泄漏的依据，其具体步骤如下：1）在液压缸的进油管路上安装流量计；2）将液压缸全行程伸出，测量出流量计的累计数值a0作为基准值；3）液压缸运行中，计算机实时检测任一次液压缸满行程时的累计流量a，当a与a0差值超过上限时，即判定液压缸出现泄漏；4）切断压力源。所述上限为a0×（0.01～0.1）。与现有技术相比，本发明的有益效果是：能及时发出报警信号切断压力源，减少因油品流失造成的环境污染和资源浪费；避免引发火灾。
The invention relates to the field of hydraulic transmission, in particular to an online detection method and device for hydraulic pipeline leakage, which is characterized in that the oil intake volume of the hydraulic cylinder is measured, and the oil intake volume when the hydraulic cylinder is qualified is used as a benchmark to judge in real time The difference between the oil inlet volume and the reference value is used as the basis for the leakage of the hydraulic cylinder. The specific steps are as follows: 1) Install a flowmeter on the oil inlet pipeline of the hydraulic cylinder; 2) Extend the hydraulic cylinder to the full stroke and measure the flowmeter The cumulative value a 0 is used as the reference value; 3) During the operation of the hydraulic cylinder, the computer detects the cumulative flow a of any hydraulic cylinder full stroke in real time. When the difference between a and a 0 exceeds the upper limit, it is determined that the hydraulic cylinder is leaking; 4) Cut off the pressure source. The upper limit is a 0 × (0.01-0.1). Compared with the prior art, the invention has the beneficial effects of sending out an alarm signal in time to cut off the pressure source, reducing environmental pollution and resource waste caused by oil loss, and avoiding fires.
Description
技术领域 technical field
本发明涉及液压传动领域，尤其涉及一种液压管路泄漏的在线检测方法及装置。The invention relates to the field of hydraulic transmission, in particular to an online detection method and device for hydraulic pipeline leakage.
背景技术 Background technique
目前热轧生产线广泛采用液压传动装置传递动力，液压缸做为执行元件与机械传动相比具有体积小、传动功率大等优点，一旦液压缸管路泄漏的油液接触到坯料或成品，由于热轧生产线的坯料和成品温度高，就会引起火灾，造成重大损失；即使泄漏的油液没接触到坯料或成品，不会引起火灾，也会造成严重的环境污染和资源浪费。At present, the hot rolling production line widely adopts the hydraulic transmission device to transmit power. Compared with the mechanical transmission, the hydraulic cylinder has the advantages of small size and high transmission power. If the temperature of the billets and finished products in the rolling production line is high, it will cause a fire and cause heavy losses; even if the leaked oil does not touch the billets or finished products, it will not cause a fire, but will also cause serious environmental pollution and waste of resources.
目前检测油液泄露的方法主要还是依赖于个体对事故预案的掌握程度，由于个体差异较大，很难保证效果；或者恰好有人走到泄漏部位而发现，此种方式偶然性比较大；另外可根据油箱的液位降低到低限值而发出报警，这种方法油品浪费比较多。At present, the method of detecting oil leakage mainly depends on the individual's mastery of the accident plan. Due to the large individual differences, it is difficult to guarantee the effect; or someone just walks to the leakage site and finds it. The liquid level of the oil tank is lowered to the lower limit and an alarm is issued. This method wastes more oil.
发明内容 Contents of the invention
本发明的目的是提供一种液压管路泄漏的在线检测方法及装置，能够及时检测出液压缸及其进油管路存在的泄漏问题，并及时发出报警信号并切断压力源，避免事故扩大，减少管路爆裂后的油品浪费，杜绝火灾隐患。The purpose of the present invention is to provide an online detection method and device for hydraulic pipeline leakage, which can detect the leakage problem of the hydraulic cylinder and its oil inlet pipeline in time, and send an alarm signal in time and cut off the pressure source, so as to avoid the expansion of accidents and reduce The oil product after the pipeline burst is wasted, and the fire hazard is eliminated.
为解决上述技术问题，本发明的技术方案是：In order to solve the problems of the technologies described above, the technical solution of the present invention is:
一种液压管路泄漏的在线检测方法，对液压缸的进油量进行计量，以液压缸合格时的进油量为基准，实时判断进油量与基准值的差值，作为液压缸及其进油管路泄漏的依据，其具体步骤如下：An online detection method for hydraulic pipeline leakage, which measures the oil intake of a hydraulic cylinder, and uses the oil intake when the hydraulic cylinder is qualified as a benchmark to judge the difference between the oil intake and the reference value in real time, as a hydraulic cylinder and its The basis for the leakage of the oil inlet pipeline, the specific steps are as follows:
1）在液压缸的进油管路上安装流量计，该流量计具有累计和远传功能；1) Install a flowmeter on the oil inlet pipeline of the hydraulic cylinder, which has accumulation and remote transmission functions;
2）当液压缸及其进油管路处于合格状态时，将液压缸全行程伸出，测量出流量计的累计数值a0作为基准值，此值即为液压缸工作腔的内容积；2) When the hydraulic cylinder and its oil inlet pipeline are in a qualified state, extend the hydraulic cylinder to the full stroke, measure the cumulative value a 0 of the flowmeter as the reference value, and this value is the internal volume of the hydraulic cylinder working chamber;
3）液压缸运行中，计算机实时检测任一次液压缸满行程时的累计流量a，并将累计流量a与基准值a0比较，当a与a0差值超过上限时，即判定液压缸或流量计下游进油管路出现泄漏；3) During the operation of the hydraulic cylinder, the computer detects the cumulative flow a of any hydraulic cylinder full stroke in real time, and compares the cumulative flow a with the reference value a 0. When the difference between a and a 0 exceeds the upper limit, it is determined that the hydraulic cylinder is Leakage in the oil inlet pipeline downstream of the flowmeter;
4）计算机发出指令使流量计上游换向阀关闭，切断压力源。4) The computer sends an instruction to close the reversing valve upstream of the flowmeter and cut off the pressure source.
所述上限为a0×（0.01～0.1）。The upper limit is a 0 × (0.01-0.1).
一种液压管路泄漏的在线检测装置，包括流量计，该流量计设置在液压缸的进油管路上，所述流量计的4～20mA信号输出端与远处计算机相连。An on-line detection device for leakage of a hydraulic pipeline includes a flowmeter, which is arranged on the oil inlet pipeline of a hydraulic cylinder, and the 4-20mA signal output end of the flowmeter is connected with a remote computer.
所述流量计紧连于换向阀下游的单向阀的出口端。The flow meter is closely connected to the outlet port of the one-way valve downstream of the reversing valve.
与现有技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
设备运行时，能够及时检测出某个液压缸及其进油管路存在的泄漏问题；管路爆裂后，能及时发出报警信号切断压力源，避免事故扩大，减少因油品流失造成的环境污染和资源浪费；避免因油品飞溅引发的火灾发生。When the equipment is running, it can detect the leakage problem of a hydraulic cylinder and its oil inlet pipeline in time; after the pipeline bursts, it can send an alarm signal in time to cut off the pressure source, avoid the expansion of the accident, and reduce the environmental pollution and pollution caused by the loss of oil products. Waste of resources; avoid fires caused by oil splashes.
附图说明 Description of drawings
图1是本发明装置实施例结构示意图。Fig. 1 is a schematic structural diagram of an embodiment of the device of the present invention.
图中：1-流量计 2-单向阀 3-液压缸 4-电磁（液）换向阀In the picture: 1-flow meter 2-one-way valve 3-hydraulic cylinder 4-electromagnetic (hydraulic) reversing valve
具体实施方式 Detailed ways
下面结合附图对本发明的具体实施方式作进一步说明：The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:
见图1，是本发明一种液压管路泄漏的在线检测装置实施例结构示意框图，包括流量计1，该流量计1设置在液压缸3的进油管路上，流量计1的4～20mA信号输出端与远处计算机相连。流量计1紧连于电磁（液）换向阀4下游的单向阀2的出口端。See Fig. 1, which is a schematic structural block diagram of an embodiment of an online detection device for hydraulic pipeline leakage according to the present invention, including a flowmeter 1, which is arranged on the oil inlet pipeline of the hydraulic cylinder 3, and the 4-20mA signal of the flowmeter 1 The output is connected to a remote computer. The flow meter 1 is closely connected to the outlet end of the one-way valve 2 downstream of the electromagnetic (liquid) reversing valve 4 .
本发明通过对液压缸的进油量进行计量，并以液压缸合格时的进油量为基准，实时判断进油量与基准值的差值，作为液压缸及其进油管路泄漏的依据，以双向液压缸为例，其具体步骤如下：The present invention measures the oil intake of the hydraulic cylinder and judges the difference between the oil intake and the reference value in real time based on the oil intake when the hydraulic cylinder is qualified, as the basis for the leakage of the hydraulic cylinder and its oil intake pipeline. Taking the two-way hydraulic cylinder as an example, the specific steps are as follows:
1）在液压缸3的无杆腔和有杆腔的进油管路上分别安装流量计1及流量计1＇，流量计1位于单向阀2的下游，距离上游电磁（液）换向阀4越近越好，液压缸3与流量计1之间的进油管路长度有时可达上百米，为了满足要求，流量计1的计数具有累计远传的功能，输出4-20mA信号给计算机；1) Install flowmeter 1 and flowmeter 1' on the oil inlet pipelines of the rodless cavity and the rod cavity of the hydraulic cylinder 3 respectively. The flowmeter 1 is located downstream of the check valve 2 and 4 The closer the better, the length of the oil inlet pipeline between the hydraulic cylinder 3 and the flow meter 1 can sometimes reach hundreds of meters. In order to meet the requirements, the count of the flow meter 1 has the function of cumulative remote transmission, and outputs 4-20mA signals to the computer;
2）当液压缸及其进油管路处于合格状态时，将液压缸全行程伸出和缩回，测量出流量计的累计数值a0和a0＇作为基准值，此值对应即为液压缸工作腔的内容积；2) When the hydraulic cylinder and its oil inlet pipeline are in a qualified state, extend and retract the hydraulic cylinder for the full stroke, and measure the accumulated values a 0 and a 0 ' of the flowmeter as the reference value, which corresponds to the hydraulic cylinder The inner volume of the working chamber;
3）液压缸运行中，计算机执行程序实时检测任一次液压缸满行程时的累计流量a，并实时将累计流量a与基准值a0比较，当a与a0差值超过上限时，即判定液压缸出现泄漏；无杆腔和有杆腔分别各自叛定，当出现一侧数值超限而另一侧正常时，提示超限侧进油管路可能泄漏；而当两侧数值均超限时，在排除管路因外力破损情况下，液压缸内漏可能性大；3) During the operation of the hydraulic cylinder, the computer executes the program to detect the cumulative flow a of any hydraulic cylinder full stroke in real time, and compares the cumulative flow a with the reference value a 0 in real time. When the difference between a and a 0 exceeds the upper limit, it is judged There is leakage in the hydraulic cylinder; the rodless chamber and the rod chamber are respectively determined. When the value on one side exceeds the limit and the other side is normal, it indicates that the oil inlet pipeline on the overrun side may leak; and when the values on both sides exceed the limit, In the case of damage to the discharge pipeline due to external force, the possibility of internal leakage of the hydraulic cylinder is high;
4）计算机发出指令使流量计上游电磁（液）换向阀4关闭，切断压力源，避免事故扩大，操作人员进入现场进行液压缸及其进油管路的检查与维护，更换泄漏的管路和密封件。4) The computer sends an instruction to close the electromagnetic (hydraulic) reversing valve 4 upstream of the flowmeter, cut off the pressure source, and avoid the expansion of the accident. The operator enters the site to inspect and maintain the hydraulic cylinder and its oil inlet pipeline, and replace the leaking pipeline and Seals.
程序中设定的上限为a0×（0.01～0.1），上限数值可根据实际情况选择。The upper limit set in the program is a 0 × (0.01~0.1), and the upper limit value can be selected according to the actual situation.
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| 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 |
| CN113358300A (en) * | 2021-05-27 | 2021-09-07 | 中冶赛迪工程技术股份有限公司 | Hydraulic system pipeline leakage state detection system |
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