An automatic control device for oil overflow alarm in the filter tank of a pressure plate oil filter machine.

Abstract

This disclosure provides an automatic control device for oil overflow alarm in the filter tank of a platen oil filter, belonging to the field of filter press technology. It includes a platen oil filter, a local control unit connected to the motor of the platen oil filter, and a host computer remotely connected to the local control unit. Both the inlet and outlet pipes of the platen oil filter are equipped with electric valves, which are connected to the local control unit to start and stop the platen oil filter and open and close the two electric valves via the host computer or the local control unit. A liquid level sensor is installed in the filter tank of the platen oil filter, connected to the local control unit, which is connected to an alarm unit to shut down the platen oil filter and issue an alarm when the oil level in the filter tank reaches a high level. This disclosure ensures that oil will not leak during use, reduces labor intensity, and improves the safety of oil filtration.

Description

Technical Field

[0001] This disclosure relates to the field of filter press technology, specifically to an automatic control device for oil overflow alarm in the filter tank of a plate oil filter. Background Technology

[0002] Due to varying equipment characteristics, requirements, and operating conditions, hydropower plants require the use of oils with different properties during operation. Therefore, oil filters have become essential supporting equipment for hydropower plant machinery and equipment. Plate filter oil filters (also known as pressure plate and frame oil filters) are industrial devices used to filter water, impurities, and gases from oil, and are widely used in power, metallurgy, petrochemical, and mechanical lubrication fields. Before the technical upgrades described in this disclosure, the hydropower plant where the applicant operates the plate filter oil filters primarily relies on on-site personnel to operate valves, start and stop the filter, monitor the filtration process, and replace filter paper. Prolonged work can easily lead to operator fatigue. If the oil overflow pipe in the filter tank becomes blocked, leaks of turbine oil, insulating oil, and other oils can easily occur if on-site personnel are not careful, potentially causing environmental incidents. Utility Model Content

[0003] The main objective of this disclosure is to provide an automatic control device for oil overflow alarm in the filter tank of a pressure plate oil filter, so as to solve or partially solve the technical problems pointed out in the background art. To this end, this disclosure provides the following technical solution:

[0004] An automatic control device for oil overflow alarm in a platen oil filter includes a platen oil filter, a local control unit connected to the motor of the platen oil filter, and a host computer remotely connected to the local control unit. Both the inlet and outlet pipes of the platen oil filter are equipped with electric valves. Two of the electric valves are connected to the local control unit, allowing the host computer or the local control unit to start / stop the platen oil filter and open / close the two electric valves. A liquid level sensor is installed in the oil filter tank of the platen oil filter. The liquid level sensor is connected to the local control unit, which is connected to an alarm unit. The liquid level sensor detects the liquid level in the oil filter tank and sends the detection result to the local control unit. When the liquid level reaches a preset high level, the local control unit triggers the alarm unit and sends a control signal to stop the platen oil filter and close the two electric valves.

[0005] In at least one embodiment, the device further includes an oil drum, a dirty oil pipe, a clean oil pipe, and an oil supply pipe; the dirty oil pipe connects the bottom of the oil drum to the inlet pipe of the pressure plate oil filter; the clean oil pipe connects the top of the oil drum to the outlet pipe of the pressure plate oil filter; and the oil supply pipe connects to the lower middle part of the oil drum. Furthermore, valves are provided on the pipes connecting the oil drum to the dirty oil pipe, the clean oil pipe, and the oil supply pipe.

[0006] In at least one embodiment, the host computer is connected to the local control unit via Ethernet; the local control unit is directly connected to the electric valve via a control signal line; the motor of the pressure plate oil filter is connected to a relay, and the local control unit is connected to the relay via a control signal line.

[0007] This disclosure achieves at least the following beneficial effects: The control device provided by this disclosure can realize on-site and remote one-button start function, opening the oil supply pipeline valve and oil outlet pipeline valve of the oil filter to start the oil filter; and realize on-site and remote one-button stop function, stopping the oil filter and closing the oil supply pipeline valve and oil outlet pipeline valve of the oil filter; and when the oil level in the oil filter tank is too high, it automatically starts the alarm and automatically stops the operation of the oil filter and closes the inlet and outlet valves of the oil filter, ensuring that the oil will not leak, reducing labor intensity and improving the safety of oil filtration. Attached Figure Description

[0008] One or more embodiments of this disclosure will now be described by way of example only with reference to the accompanying drawings, in which:

[0009] Figure 1 This is a schematic diagram of the connection of the automatic control device for oil overflow alarm in the oil filter tank of the pressure plate oil filter machine shown in the embodiment of this disclosure.

[0010] The following are the labels in the diagram: 10, pressure plate oil filter; 20, local control unit; 30, host computer; 40, electric valve; 50, liquid level sensor; 60, alarm unit; 70, oil tank; 71, dirty oil pipe; 72, clean oil pipe; 73, oil supply pipe. Detailed Implementation

[0011] The present disclosure will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present disclosure may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure more complete and to fully convey the concept of the present disclosure to those skilled in the art.

[0012] In the description of this disclosure, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this disclosure.

[0013] like Figure 1 As shown, the automatic control device for oil overflow alarm of the oil filter tank of the pressure plate oil filter provided in this disclosure includes a pressure plate oil filter 10, a local control unit 20 connected to the motor of the pressure plate oil filter 10, and a host computer 30 remotely connected to the local control unit 20. Both the oil inlet and outlet pipes of the pressure plate oil filter 10 are equipped with electric valves 40. The two electric valves 40 are connected to the local control unit 20, so that the pressure plate oil filter 10 can be started and stopped (opened and stopped) and the two electric valves 40 can be opened and closed (opened and closed) via the host computer 30 or the local control unit 20. A liquid level sensor 50 is installed in the oil filter tank of the pressure plate oil filter 10. The liquid level sensor 50 is connected to the local control unit 20, and the local control unit 20 is connected to the alarm unit 60. The liquid level sensor 50 is used to detect the liquid level in the oil filter tank and send the detection result to the local control unit 20. When the liquid level reaches the preset high level, the local control unit 20 triggers the alarm unit 60 to sound an alarm and sends a control signal to stop the pressure plate oil filter 10 and close the two electric valves 40.

[0014] It needs to be explained that among the components mentioned above:

[0015] The pressure plate oil filter (also known as a pressure plate and frame oil filter) mainly consists of a filter bed, an oil pump, a coarse filter, filter plates, and filter frames. After the oil pump motor starts, the dirty oil to be purified is fed into the filter bed. Large particles of impurities are removed by the coarse filter, and then the oil enters the sealed chamber formed by the filter plates and filter frames. Impurities are trapped on the surface of the filter paper, and the filtered oil is discharged from the oil outlet, thus achieving the filtration and purification of dirty oil.

[0016] A Local Control Unit (LCU) is a distributed terminal in an industrial automation system responsible for monitoring and controlling field equipment. It is typically deployed near the equipment (such as generator floors or switchyards) and directly interfaces with the production process. Its core functions include data acquisition, real-time control, logic operations, and fault diagnosis. In hydropower plants, it is mainly used to monitor equipment such as turbines, generators, and transformers, enabling functions such as sequential control, emergency shutdown, and grid synchronization. Local control unit models that can be used in this disclosure include: Modicon series PLCs (Schneider Electric), SJ-600 or SJ-500 series (NARI Group), and AC450 controllers (ABB).

[0017] A host computer is a computer device in industrial automation, Internet of Things and other systems that is responsible for monitoring, management, data analysis and command issuance. It can be used to send commands to lower-level computers (such as the local control unit in this disclosure) to coordinate equipment operation. It can also interact with humans and machines, and realize parameter setting, alarm prompts and historical data query through a graphical interface.

[0018] An electric valve is a common industrial device that uses an electric actuator to drive the valve to achieve opening, closing, or regulation. It consists of two parts: an electric actuator and a valve body. Since this disclosure mainly uses electric valves for simple fully open / fully closed control, on / off type electric ball valves or electric gate valves can be selected.

[0019] A liquid level sensor is a device that converts changes in liquid height or volume into an electrical signal. It is widely used in industrial automation, water treatment, energy, and other fields. The most common type is the float-type liquid level sensor. Its working principle involves a magnetic float rising and falling with the liquid level to trigger a switch signal. Simply setting the float position that triggers the switch signal to the preset high position as described in this disclosure achieves a simple liquid level alarm.

[0020] The alarm unit (alarm module) is mainly used to trigger an alarm when the detected data exceeds a preset threshold. The alarm unit can be an external device (i.e., connected via a control signal line) or a module built into the local control unit (i.e., connected via an internal circuit). Existing common local control units often integrate alarm modules. In order to enable immediate response, this disclosure prioritizes the use of audible and visual alarm modules. This type of alarm module provides immediate on-site warning by triggering a buzzer and / or an LED flashing light.

[0021] The host computer 30 is connected to the local control unit 20 via Ethernet (which can be connected via fiber optic cable and multi-level switches). The local control unit 20 is directly connected to the electric valve 40 via a control signal line (e.g., shielded cable). The motor of the pressure plate oil filter 10 is connected to a relay, and the local control unit 20 is connected to the relay via a control signal line (e.g., shielded cable) to achieve the purpose of controlling the high-voltage circuit with a low-voltage control signal.

[0022] In one specific embodiment, the automatic control device for oil overflow alarm of the platen oil filter tank also includes an oil tank 70, a dirty oil pipe 71, a clean oil pipe 72, and an oil supply pipe 73. The dirty oil pipe 71 connects the bottom of the oil tank 70 to the oil inlet pipe of the platen oil filter 10; the clean oil pipe 72 connects the top of the oil tank 70 to the oil outlet pipe of the platen oil filter 10; and the oil supply pipe 73 connects to the lower middle part of the oil tank 70 (i.e., in the middle or lower part of the oil tank 70, at a height between the connection point of the clean oil pipe 72 and the dirty oil pipe 71). Valves (ordinary valves are sufficient) are installed on the pipes connecting the oil tank 70 to the dirty oil pipe 71, the clean oil pipe 72, and the oil supply pipe 73. By setting up oil tanks and oil pipes for conveying different types of oil, it is beneficial to connect multiple platen oil filters simultaneously, as well as various oil-using equipment in hydropower plants. In use, dirty oil (including the bottom oil after impurities settle at the bottom of oil drum 70) enters the oil inlet pipe of the pressure plate oil filter 10 through the dirty oil pipe 71, and then enters the pressure plate oil filter 10 for filtration. The filtered clean oil enters the clean oil pipe 72 through the oil outlet pipe of the pressure plate oil filter 10, and then enters from the top of the oil drum 70 and is collected in the oil drum 70. The collected clean oil is uniformly transported from the side wall of the oil drum 70 to the oil supply pipe 73 for use by various oil-using equipment.

[0023] The automatic alarm control device provided in this disclosure mainly includes the following three control loops: First, a local and remote one-button start loop, which sends a start signal through the host computer or local control unit, and opens the valves of the oil filter's oil supply pipeline and oil outlet pipeline to start the oil filter; Second, a local and remote one-button stop loop, which sends a stop signal through the host computer or local control unit, and stops the oil filter and closes the valves of the oil filter's oil supply pipeline and oil outlet pipeline; Third, an alarm and automatic stop loop, which automatically activates the alarm and automatically stops the operation of the oil filter and closes the valves of the oil filter's inlet and outlet when the oil level in the oil filter's oil tank is too high, ensuring that the oil does not leak.

[0024] It should be understood that all the above embodiments are exemplary and not restrictive. Various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of this disclosure should be within the protection scope of this disclosure.

Claims

1. An automatic control device for oil overflow alarm of a platen oil filter, comprising a platen oil filter (10), a local control unit (20) connected to the motor of the platen oil filter (10) in the field, and a host computer (30) remotely connected to the local control unit (20), characterized in that: The oil inlet and outlet pipes of the platen oil filter (10) are equipped with electric valves (40). The two electric valves (40) are connected to the local control unit (20) so that the platen oil filter (10) can be started and stopped and the two electric valves (40) can be opened and closed through the host computer (30) or the local control unit (20). A liquid level sensor (50) is installed in the oil filter tank of the pressure plate oil filter (10). The liquid level sensor (50) is connected to the local control unit (20). The local control unit (20) is connected to the alarm unit (60). The liquid level sensor (50) is used to detect the liquid level in the oil filter tank and send the detection result to the local control unit (20). When the liquid level reaches a preset high level, the local control unit (20) triggers the alarm unit (60) to sound an alarm and sends a control signal to stop the pressure plate oil filter (10) and close the two electric valves (40).

2. The automatic control device for oil overflow alarm of the oil filter tank of the pressure plate oil filter machine according to claim 1, characterized in that, It also includes an oil drum (70), a dirty oil pipe (71), a clean oil pipe (72), and an oil supply pipe (73); the dirty oil pipe (71) is connected to the bottom of the oil drum (70) and the oil inlet pipe of the pressure plate oil filter (10); the clean oil pipe (72) is connected to the top of the oil drum (70) and the oil outlet pipe of the pressure plate oil filter (10); the oil supply pipe (73) is connected to the lower middle part of the oil drum (70).

3. The automatic control device for oil overflow alarm of the oil filter tank of the pressure plate oil filter machine according to claim 2, characterized in that, Valves are provided on the pipelines connecting the oil drum (70) to the dirty oil pipe (71), the clean oil pipe (72), and the oil supply pipe (73).

4. The automatic control device for oil overflow alarm of the oil filter tank of the pressure plate oil filter machine according to claim 1, characterized in that, The host computer (30) is connected to the local control unit (20) via Ethernet; the local control unit (20) is directly connected to the electric valve (40) via a control signal line; the motor of the pressure plate oil filter (10) is connected to a relay, and the local control unit (20) is connected to the relay via a control signal line.

Images