Water inlet service gate control system sharing hydraulic pump station

Abstract

The utility model relates to the technical field of hydraulic pump station control systems, in particular to a water inlet service gate control system sharing a hydraulic pump station, which comprises a plurality of water inlet service gate control cabinets and a hydraulic pump station control cabinet, the water inlet service gate control cabinets correspond to the PLCs respectively, the water inlet service gate control cabinets are connected with one another, the water inlet service gate control cabinets are connected with the hydraulic pump station control cabinet, the hydraulic pump station control cabinet is fixedly provided with a data acquisition unit, and the data acquisition unit is connected with the PLC. The data acquisition unit comprises a switching value signal acquisition unit, an analog signal acquisition unit and a communication signal acquisition unit; the switching value signal acquisition unit is connected with each PLC controller through a relay, the analog signal acquisition unit is connected with each PLC controller through an analog quantity trisection, and the communication signal acquisition unit is connected with each PLC controller through an RS485 module.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pump station control systems, in particular to a water inlet working gate control system of a shared hydraulic pump station. Background Art

[0002] In some hydropower plants, due to limited installation space or construction cost considerations, there are multiple water inlet working gates sharing one hydraulic pump station, that is, multiple water inlet working gates share the same oil pump, return oil tank and related valve group. The water inlet working gate generally has working conditions such as opening, closing, sliding down and lifting. At present, when multiple water inlet working gates share one hydraulic pump station, it is easy for the water inlet working gates in the same hydraulic pump station to affect each other. For example, if two water inlet working gates in the same hydraulic pump station need to be opened at the same time, the control of the oil pump and valve group of the hydraulic pump station may conflict, and there is a risk of equipment malfunction; in addition, if the same water inlet working gate needs to be opened and lowered at the same time, the control of the valve group of the hydraulic pump station is also likely to conflict, resulting in the risk of equipment malfunction. Based on this, in response to the above problems, we designed a water inlet working gate control system that shares a hydraulic pump station. Utility Model Content

[0003] The purpose of the utility model is to provide a water inlet working gate control system of a shared hydraulic pump station, which sets a PLC at each water inlet working gate control cabinet, and each water inlet working gate control cabinet shares a hydraulic pump station control cabinet, without the need for a PLC of the hydraulic pump station control cabinet, and is realized only through a hardware electrical circuit, so that the PLC of each water inlet working gate control cabinet is more closely connected with the hydraulic pump station equipment, avoiding judgment and transfer by the PLC of the hydraulic pump station control cabinet, and the structure of the system is simpler and more intuitive, reducing the workload and investment cost of early development and design, as well as the workload of later maintenance.

[0004] The embodiments of the present invention are implemented by the following technical solutions:

[0005] A water inlet working gate control system for a shared hydraulic pump station, comprising: a plurality of water inlet working gate control cabinets and a hydraulic pump station control cabinet; the water inlet working gate control cabinets respectively correspond to a PLC controller, and the respective water inlet working gate control cabinets are interconnected, and the plurality of water inlet working gate control cabinets are respectively connected to the hydraulic pump station control cabinet, wherein the hydraulic pump station control cabinet is fixedly provided with a data acquisition unit, and the data acquisition unit comprises: a switch signal acquisition unit, an analog signal acquisition unit and a communication signal acquisition unit; the switch signal acquisition unit is connected to the respective PLC controllers via a relay, the analog signal acquisition unit is connected to the respective PLC controllers via an analog quantity triplicate, and the communication signal acquisition unit is connected to the respective PLC controllers via an RS485 module.

[0006] Optionally, the switch signal acquisition unit is composed of a return tank oil level signal acquisition subunit, a system pressure signal acquisition subunit, an oil filter blockage signal acquisition subunit, an oil pump status signal acquisition subunit and a power supply status signal acquisition subunit.

[0007] Optionally, the analog signal acquisition unit is composed of a return tank oil level signal acquisition subunit, a return tank oil temperature signal acquisition subunit, and a system pressure signal acquisition subunit.

[0008] Optionally, the communication signal acquisition unit is composed of an oil pump voltage signal acquisition subunit and a current signal acquisition subunit.

[0009] Optionally, the sub-units in the switch signal acquisition unit, the analog signal acquisition unit and the communication signal acquisition unit are all sensors that achieve corresponding detection functions.

[0010] Optionally, each water inlet working gate control cabinet and hydraulic pump station control cabinet is fixedly provided with an emergency stop switch.

[0011] Optionally, the emergency stop switch of the hydraulic pump station control cabinet is distributed to each of the water inlet working gate control cabinets through a relay, and is connected in parallel with the emergency stop switches of each water inlet working gate control cabinet to disconnect the control power supply of the water inlet working gate.

[0012] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0013] The utility model sets a PLC at each water inlet working gate control cabinet, and each water inlet working gate control cabinet shares a hydraulic pump station control cabinet. The PLC of the hydraulic pump station control cabinet is not required, and it is realized only through the electrical circuit of the hardware. The PLC of each water inlet working gate control cabinet is more closely connected with the hydraulic pump station equipment, avoiding judgment and transfer by the PLC of the hydraulic pump station control cabinet. The structure of the system is simpler and more intuitive, reducing the workload and investment cost of early development and design, as well as the workload of later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model provides a schematic diagram of the principle of a water inlet working gate control system of a shared hydraulic pump station. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] like Figure 1 As shown, the utility model provides one of the embodiments: a water inlet working gate control system of a shared hydraulic pump station, comprising: a plurality of water inlet working gate control cabinets and a hydraulic pump station control cabinet; the water inlet working gate control cabinets respectively correspond to a PLC controller, and the respective water inlet working gate control cabinets are interconnected, and the plurality of water inlet working gate control cabinets are respectively connected to the hydraulic pump station control cabinet, wherein the hydraulic pump station control cabinet is fixedly provided with a data acquisition unit, and the data acquisition unit comprises: a switch signal acquisition unit, an analog signal acquisition unit and a communication signal acquisition unit; the switch signal acquisition unit is connected to each of the PLC controllers through a relay, the analog signal acquisition unit is connected to each of the PLC controllers through an analog quantity triplicate, and the communication signal acquisition unit is connected to each of the PLC controllers through an RS485 module.

[0017] In this embodiment, the key to the design of this embodiment is how to reliably realize the time-sharing sharing of the oil pump and other equipment of the hydraulic pump station when multiple water inlet working gate control cabinets are opened or lowered, and at the same time have a reliable locking function to prevent the hydraulic pump station oil pump from losing control, and to feed back the oil level, oil temperature, system pressure and oil pump status signals of the hydraulic pump station to the corresponding water inlet working gate control cabinets. Based on this, this embodiment only sets a PLC in each water inlet working gate control cabinet, and does not set a PLC in the shared hydraulic pump station control cabinet, but only sets a corresponding electrical control circuit.

[0018] Furthermore, each water inlet working gate control cabinet and the hydraulic pump station control cabinet are fixedly provided with an emergency stop switch. The emergency stop switch of the hydraulic pump station control cabinet is distributed to each water inlet working gate control cabinet through a relay, and is connected in parallel with the emergency stop switch of each water inlet working gate control cabinet to disconnect the control power supply of the water inlet working gate.

[0019] In the specific application of this embodiment, a manual / cut-off / automatic control mode handle of the oil pump is provided on the hydraulic pump station control cabinet, and a gate manual / cut-off / automatic control mode handle, gate open / stop / slow close / fast close control button, oil pump start / stop button, etc. are provided on each water inlet working gate control cabinet. The manual start and stop of the oil pump can be realized on the hydraulic pump station control cabinet. When the oil pump control mode on the hydraulic pump station control cabinet is switched to automatic, the oil pump can be manually started on the water inlet working gate control cabinet. When the oil pump control mode on the hydraulic pump station control cabinet is switched to automatic and the gate control mode is switched to automatic, the gate can be automatically opened on the water inlet working gate control cabinet. Because there are two operating locations, emergency stop buttons are provided on the hydraulic pump station control cabinet and the water inlet working gate control cabinet. Pressing any of the emergency stop buttons can realize the emergency stop of the oil pump and the gate (except fast closing). The specific implementation method is: first, the emergency stop button signal of the hydraulic pump station control cabinet is distributed to each water inlet working gate control cabinet through a relay, and after being connected in parallel with the emergency stop button signal in the water inlet working gate control cabinet, it is used to disconnect the gate valve group control power supply; secondly, the emergency stop button signals of each water inlet working gate control cabinet are sent to the hydraulic pump station control cabinet, and after being connected in parallel with the emergency stop button signal of the hydraulic pump station control cabinet, they are used to disconnect the oil pump control circuit.

[0020] In this embodiment, the switch signal acquisition unit is composed of a return tank oil level signal acquisition subunit, a system pressure signal acquisition subunit, an oil filter blockage signal acquisition subunit, an oil pump status signal acquisition subunit, and a power supply status signal acquisition subunit. The analog signal acquisition unit is composed of a return tank oil level signal acquisition subunit, a return tank oil temperature signal acquisition subunit, and a system pressure signal acquisition subunit. The communication signal acquisition unit is composed of an oil pump voltage signal acquisition subunit and a current signal acquisition subunit. The subunits in the switch signal acquisition unit, the analog signal acquisition unit, and the communication signal acquisition unit are all sensors that achieve corresponding detection functions.

[0021] In the specific application of this embodiment, the acquisition of switch quantity signals is mainly aimed at detecting binary signals such as presence, on / off, high and low at the inlet and outlet working gates. The states of switch quantity signals are usually only two, such as open or close, 0 or 1. Digital input modules are usually used to collect such signals. In this embodiment, for the oil level of the return oil tank, this embodiment can use a float switch sensor to detect whether the oil level is high or low; the system pressure can be detected by the pressure switch sensor to detect whether the system reaches the preset pressure threshold; the differential pressure switch sensor can detect the pressure difference before and after the oil filter to determine whether it is blocked; and the oil pump state and power supply state can be detected by the power supply monitoring relay or other switch quantity sensors. Analog quantity signal acquisition involves converting continuous physical quantities (such as temperature, pressure, flow, etc.) into continuous electrical signals, and then converting them into digital signals through an analog / digital converter (ADC) for processing. In this embodiment, for the oil level and system pressure of the return oil tank, this embodiment uses a pressure sensor or a liquid level sensor for continuous monitoring; the oil temperature of the return oil tank is monitored by a temperature sensor (such as a thermocouple or RTD). Communication signal acquisition mainly collects data sent by the device through a communication interface (such as RS-485, Ethernet, etc.). In this embodiment, for the oil pump voltage and current, this embodiment sends the voltage and current data to the PLC through a voltage and current sensor with wireless communication. It can be understood that the sensors used in the switch signal acquisition unit, analog signal acquisition unit and communication signal acquisition unit described in this embodiment correspond to the subunits described in this embodiment, and can be implemented by similar detectors and the like. This embodiment only uses the above sensors as examples of acquisition subunits.

[0022] In addition, in terms of the hardware interlocking of the oil pump control, the oil pump control commands of the PLCs of the control cabinets for the working gates of the water inlet are directly sent to the control cabinet of the hydraulic pump station, and the hardware interlocking of the oil pump control is realized by interlocking the relay contacts in the electrical control circuit inside the cabinet. The specific working principle is that after one of the working gates of the water inlet receives the oil pump start command from the staff, the opening circuits of other gates are immediately disconnected, the oil pumps of other gates are locked, and the operating status of the oil pumps is fed back to the PLCs of the control cabinets for the working gates of each water inlet. The hardware interlocking of the oil pump control can reliably prevent human error. For example, if the oil pump is started by operating one of the gates, it will no longer be possible to start the oil pump by operating other gates, so as to avoid the error of starting the oil pump after going to the wrong interval.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water inlet working gate control system for a shared hydraulic pump station, characterized in that: include: Multiple water inlet working gate control cabinets and hydraulic pump station control cabinets; the water inlet working gate control cabinets correspond to a PLC controller respectively, and the water inlet working gate control cabinets are interconnected, and the multiple water inlet working gate control cabinets are connected to the hydraulic pump station control cabinet respectively, wherein the hydraulic pump station control cabinet is fixedly provided with a data acquisition unit, and the data acquisition unit includes: a switch signal acquisition unit, an analog signal acquisition unit and a communication signal acquisition unit; the switch signal acquisition unit is connected to each of the PLC controllers through a relay, the analog signal acquisition unit is connected to each of the PLC controllers through an analog quantity triplicate, and the communication signal acquisition unit is connected to each of the PLC controllers through an RS485 module.

2. The water inlet working gate control system of the shared hydraulic pump station according to claim 1, characterized in that: The switch signal acquisition unit is composed of a return tank oil level signal acquisition subunit, a system pressure signal acquisition subunit, an oil filter blockage signal acquisition subunit, an oil pump status signal acquisition subunit and a power supply status signal acquisition subunit.

3. The water inlet working gate control system of the shared hydraulic pump station according to claim 1, characterized in that: The analog signal acquisition unit is composed of an oil return tank oil level signal acquisition subunit, an oil return tank oil temperature signal acquisition subunit, and a system pressure signal acquisition subunit.

4. The water inlet working gate control system of the shared hydraulic pump station according to claim 1, characterized in that: The communication signal acquisition unit is composed of an oil pump voltage signal acquisition subunit and a current signal acquisition subunit.

5. The water inlet working gate control system of the shared hydraulic pump station according to any one of claims 1 to 4, characterized in that: The sub-units in the switch signal acquisition unit, the analog signal acquisition unit and the communication signal acquisition unit are all sensors that achieve corresponding detection functions.

6. The water inlet working gate control system of the shared hydraulic pump station according to claim 1, characterized in that: Emergency stop switches are fixedly installed at each water inlet working gate control cabinet and hydraulic pump station control cabinet.

7. The water inlet working gate control system of the shared hydraulic pump station according to claim 6, characterized in that: The emergency stop switch of the hydraulic pump station control cabinet is distributed to each of the water inlet working gate control cabinets through a relay, and is connected in parallel with the emergency stop switches of each water inlet working gate control cabinet to disconnect the control power supply of the water inlet working gate.

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