阅读说明：本技术 一种基于传感器的在线滤油设备紧急切断保护装置 (On-line oil filtering equipment emergency cut-off protection device based on sensor ) 是由 王刚 刘清亮 胡海亮 焦玉杰 秦福鹏 耿新博 王辉 王洪 曹辉 于 2021-03-18 设计创作，主要内容包括：本发明公开了一种基于传感器的在线滤油设备紧急切断保护装置,包括：油箱(1)、油箱接触式液位计(2)、在线滤油保安装置(3)、滤油机(4)、电源箱(5)和油口管道；滤油机(4)通过油口管道及阀门与油箱(1)连接；油箱接触式液位计(2)安装在油箱(1)上部,其探头深入到油箱(1)内部；油箱接触式液位计(2)与在线滤油保安装置(3)连接；电源箱(5)连接在线滤油保安装置(3)和滤油机(4)。本发明能够有效的降低滤油机滤油泄漏时造成的风险,从而保证汽轮发电机组安全稳定运行,整体结构简单,改造安装方便,操作使用简单,稳定性好,可靠性高。(The invention discloses an on-line oil filtering equipment emergency cut-off protection device based on a sensor, which comprises: the oil filter comprises an oil tank (1), an oil tank contact type liquid level meter (2), an online oil filtering safety device (3), an oil filter (4), a power supply box (5) and an oil port pipeline; the oil filter (4) is connected with the oil tank (1) through an oil port pipeline and a valve; the oil tank contact type liquid level meter (2) is arranged at the upper part of the oil tank (1), and a probe of the oil tank contact type liquid level meter extends into the oil tank (1); the oil tank contact type liquid level meter (2) is connected with an online oil filtering safety device (3); the power supply box (5) is connected with the online oil filtering safety device (3) and the oil filter (4). The invention can effectively reduce the risk caused by leakage of the oil filter, thereby ensuring the safe and stable operation of the steam turbine generator unit, and has the advantages of simple integral structure, convenient transformation and installation, simple operation and use, good stability and high reliability.)

1. The utility model provides an online oil filtering equipment emergency cut-off protection device based on sensor which characterized in that includes: the oil filter comprises an oil tank (1), an oil tank contact type liquid level meter (2), an online oil filtering safety device (3), an oil filter (4), a power supply box (5) and an oil port pipeline; the oil filter (4) is connected with the oil tank (1) through an oil port pipeline and a valve; the oil tank contact type liquid level meter (2) is arranged at the upper part of the oil tank (1), and a probe of the oil tank contact type liquid level meter extends into the oil tank (1); the oil tank contact type liquid level meter (2) is connected with an online oil filtering safety device (3); the power supply box (5) is connected with the online oil filtering safety device (3) and the oil filter (4).

2. The on-line oil filtering equipment emergency cut-off protection device based on the sensor according to claim 1, characterized in that the oil tank (1) is provided with an oil tank oil outlet electric door (6) and an oil tank oil return electric door (7).

3. The on-line oil filtering equipment emergency cut-off protection device based on the sensor as claimed in claim 2, characterized in that the oil tank oil outlet electric door (6) and the oil tank oil return electric door (7) are electric valves.

4. The on-line oil filtering equipment emergency cut-off protection device based on the sensor according to claim 1, characterized in that the tank contact level gauge (2) is provided with a signal transmission device.

5. A sensor-based on-line oil filtration equipment emergency shutdown protection device as claimed in claim 1, characterized in that the on-line oil filtration safety device (3) is provided with signal receiving and feedback means.

Technical Field

The invention relates to the field of protection of a steam turbine oil system, in particular to an on-line oil filtering equipment emergency cut-off protection device based on a sensor.

Background

The oil station of the forced circulation oil system of the rotating equipment of the thermal power plant needs to be regularly filtered, and the online oil filtering equipment generally has a plurality of connecting pipelines and slipknots, so that due to the limitation of site conditions, bending stress exists in a part of pipelines, and the pipelines are steel wire hoses, so that the leakage risk exists; the connecting pipeline interface is mostly fixed by iron wires or hose clamps, and the fixing mode is not firm; when the oil filter operates, leakage can be caused due to the opening of a pipeline or the loosening of the fixing and the like.

In the report of No. 10 unit 2 month and 27 day unplanned outage event analysis of a certain thermal power plant in Hebei in 2020, because the oil filter work is carried out during the operation of the water supply pump unit, the connecting pipeline of the oil filter leaks, the oil level of an oil tank of a coupler of the water supply pump is low, and the water supply pump trips the unit to be not stopped; in a brother power plant in the system, due to the leakage of an oil filter interface, the differential pressure of a filter element is too large, and a filter screen material enters an oil system to cause multiple events such as unit shutdown, system pollution and the like, and even more, fire accidents are caused. In view of the particularity of oil filtering work, the emergency cut-off protection device for the online oil filtering equipment is provided, and the running reliability of the oil filtering equipment is ensured so as to guarantee the running safety of a system. At present, oil is filtered by manual on-site monitoring, when leakage occurs, an oil filter cannot be stopped and an entrance door cannot be closed in time, so that oil leakage accidents are caused, and a unit can be stopped in serious cases.

The utility model discloses a lubricating oil distributor in utility model for patent number CN208587720U, this scheme do not set up the cut-off system, detect that the lubricating oil liquid level can only play the warning effect when crossing low excessively.

Disclosure of Invention

The invention mainly aims to provide an on-line oil filtering equipment emergency cut-off protection device based on a sensor, and aims to control quick cut-off and shutdown of an oil filtering system and block an accident chain through liquid level detection so as to ensure that lubricating oil does not leak under abnormal conditions, improve the safety level of equipment, ensure the safe operation of a main system of a unit and reduce the consumption of human resources.

In order to achieve the above object, the present invention provides an on-line oil filtering apparatus emergency cut-off protection device based on a sensor, comprising: the system comprises an oil tank, an oil tank contact type liquid level meter, an online oil filtering safety device, an oil filter, a power box and an oil port pipeline; the oil filter is connected with the oil tank through an oil port pipeline and a valve; the oil tank contact type liquid level meter is arranged at the upper part of the oil tank, and a probe of the oil tank contact type liquid level meter extends into the oil tank; the oil tank contact type liquid level meter is connected with an online oil filtering safety device; the power box is connected with the online oil filtering safety device and the oil filter.

Preferably, an oil tank oil outlet electric door and an oil tank oil return electric door are arranged on the oil tank.

Preferably, the oil tank oil outlet electric door and the oil tank oil return electric door are electric valves, and the closing speed is high.

Preferably, a signal transmission device is arranged on the oil tank contact type liquid level meter.

Preferably, the online oil filtering safety device is provided with a signal receiving and feedback device, so that a signal received by the equipment can be effectively and timely fed back, and the effective execution of the whole process is ensured.

Based on the technical scheme, the following technical effects can be generated:

the embodiment of the invention provides an emergency cut-off protection device of an online oil filtering device based on a sensor, which is suitable for a lubricating oil filtering process. The device can effectively reduce the risk caused by leakage of oil filter of the oil filter, thereby ensuring the safe and stable operation of the turbo generator set, and has the advantages of simple integral structure, convenient modification and installation, simple operation and use, good stability and high reliability. When the inside liquid level of oil tank was detected to set value when oil tank contact level gauge (taking the feedback), can in time send feedback signal to protection device, protection device sends output signal to oil tank oil-out electrically operated gate and oil tank oil return electrically operated gate through judging, makes it close rapidly, the stability of oil tank liquid level has been guaranteed to very big degree to avoid causing other occurences of failure because the liquid level is low.

Drawings

Fig. 1 is a schematic structural diagram of an emergency cut-off protection device of an online oil filtering device based on a sensor.

The reference numbers illustrate:

1-oil tank, 2-oil tank contact type liquid level meter, 3-online oil filtering safety device, 4-oil filter, 5-power box, 6-oil tank oil outlet electric door, and 7-oil tank oil return electric door.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

The invention provides an embodiment, and referring to fig. 1, fig. 1 is a schematic structural diagram of an emergency cut-off protection device of an online oil filtering equipment based on a sensor.

As shown in fig. 1, in the present embodiment, an on-line oil filtering apparatus emergency cut-off protection device based on a sensor mainly includes an oil tank 1, an oil tank contact type liquid level meter 2, an on-line oil filtering safety device 3, an oil filter 4, a power supply box 5, an oil tank oil outlet electric door 6, and an oil tank oil return electric door 7.

An oil tank oil outlet electric door 6 and an oil tank oil return electric door 7 are arranged on the oil tank 1, and an oil filter oil inlet pipeline is arranged between the oil tank oil outlet electric door 6 and an oil inlet pipe of the oil filter 4; an oil filter outlet oil pipeline is arranged between the oil outlet pipe of the oil filter 4 and the oil tank oil return electric door 7; the oil outlet electric door 6 of the oil tank is connected with the output end of the online oil filtering safety device 3; the oil tank oil return electric door 7 is connected with the output end of the online oil filtering safety device 3; the oil tank contact type liquid level meter 2 is connected with the input end of the online oil filtering safety device 3.

In the embodiment, the control system is dominated by the PLC, and the device is formed by integrating a controller, a cut-off module, a power supply module and a detection module. The controller 1 is designed to run/stop two modes; the cutting module is designed to enable a cutting valve 1 to be sleeved with the oil tank oil outlet electric door 8 and the oil tank oil return electric door 9, the cutting valve is a wafer ball valve, and the ball valve is driven by a 110V power supply of a controller; the power supply controller 1 is used for quickly disconnecting the power supply of the equipment after the power supply control module realizes system interruption; the detection module is designed into an oil tank contact type liquid level meter 2 (1 group) and is designed into a contact type; the signal cable and the cut-off valve control cable are arranged according to the distance of the oil filter 4.

In the embodiment of the invention, the protection working mode of the emergency cut-off device of the online oil filtering equipment based on the sensor is as follows: open oil tank and go out oily electrically operated gate 8, oil tank oil return electrically operated gate 9, start oil filter 4, when oil tank contact level gauge 2 (take the feedback) detected that 1 inside liquid level of oil tank reduces the set value, can in time send feedback signal to protection device, protection device through judging with output signal send oil tank to go out oily electrically operated gate 8 and oil tank oil return electrically operated gate 9, make it close rapidly.

This device can be very big degree the stability of having guaranteed the oil tank liquid level to avoid causing other occurences because the liquid level is low.