Safety switch circuit of industrial personal computer of ultrasonic flow measuring device of hydroelectric generating set
By designing a safety switch circuit in the industrial computer, and using the battery charge and discharge management device and the battery to achieve a smooth transition during power outage, the problem of the inability to shut down the industrial computer safely is solved, and the stability and safety of the equipment are improved.
Patent Information
- Application Number
- CN202420894184.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-26
AI Technical Summary
When an industrial control machine encounters a planned or unplanned power outage, it cannot successfully transition to a safe shutdown state, resulting in hard disk damage, failure of the current measurement device, shortening of equipment life and increasing safety risks.
A safety switch circuit is designed. By introducing a battery charge and discharge management device and a battery, combined with the use of multiple types of relays, the industrial computer can smoothly transition to a safe shutdown state when the power is off.
It effectively prevents hard disk damage, ensures the continuous and stable operation of ultrasonic flow measurement devices, extends the service life of equipment, reduces maintenance costs, and improves the safe and stable operation of hydropower stations.
Smart Images
Figure CN222395487U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of control circuit design, in particular to a safety switch circuit of an industrial computer of an ultrasonic flow measuring device of a hydroelectric generator set. Background Art
[0002] In the development and utilization of modern hydropower energy, giant hydropower units are core equipment, and accurate monitoring and efficient control of their operating status are crucial. In order to achieve this goal, the industry generally uses ultrasonic flow measurement technology to monitor the flow rate of water diversion through the turbine in real time. Such devices are usually arranged at key positions in the pressure steel pipe. By transmitting and receiving ultrasonic signals and analyzing their propagation characteristics, the flow rate data of different parts are accurately measured, and the actual flow rate of the turbine is further calculated based on the principles of fluid mechanics. This process not only directly serves the operation scheduling and efficiency optimization of the turbine, but also has far-reaching significance for ensuring the safety of the unit, preventing excessive wear and achieving the rational allocation of water resources.
[0003] Working closely with the ultrasonic flow measuring device is the industrial computer system, which is responsible for data collection, processing and issuing control instructions. The industrial computer is equipped with a dedicated power supply. When the power switch is turned on, the system enters normal working state, continuously receives and analyzes the flow rate information transmitted by the ultrasonic flow measuring device, calculates the flow rate of the turbine, and dynamically evaluates the instantaneous efficiency of the hydropower unit in combination with the actual active power data of the unit. This real-time monitoring capability plays a decisive role in timely discovering and responding to operational anomalies, optimizing power generation strategies, and ensuring maximum economic benefits.
[0004] However, in the existing technical solutions, the operational stability and data security of the industrial computer system face certain challenges. In particular, in the case of maintenance, temporary work needs or other emergencies, it is necessary to disconnect the power supply switch of the industrial computer, or when the power supply itself fails, the industrial computer will be directly powered off. This abnormal shutdown situation may cause the following significant problems:
[0005] 1. Hard disk damage risk: If the hard disk in the industrial computer suddenly loses power while in operation, especially when data is being written, it is easy to cause physical collision between the hard disk head and the disk surface or data loss. In severe cases, it will cause hard disk damage, affecting the integrity of the system software, applications and historical monitoring data stored therein.
[0006] 2. Failure of the flow measuring device: After the industrial computer is powered off, the communication between it and the ultrasonic flow measuring device is interrupted, and data collection and processing cannot continue, resulting in the loss of the real-time monitoring function of the turbine flow rate, which directly affects the power station operators' accurate judgment and rapid response to the unit status.
[0007] 3. Shortened equipment life: Frequent or irregular power-off operations will not only directly damage the industrial computer hardware, but may also lead to frequent system restarts, increased software failures, accelerated equipment aging, shortened overall service life, and increased operation and maintenance costs.
[0008] 4. Increased safety risks: In the absence of effective flow monitoring, if abnormal operation of the turbine is not discovered and handled in a timely manner, it may trigger a chain reaction, such as hydraulic imbalance and increased vibration, posing a threat to the safe and stable operation of the unit and even the entire hydropower station. Utility Model Content
[0009] In view of the shortcomings of the prior art, the utility model proposes a safety switch circuit for the industrial computer of the ultrasonic flow measurement device of the hydropower unit in order to solve the problem that the industrial computer cannot smoothly transition to the safe shutdown state due to abnormal power failure. As an improved power supply and data protection mechanism for the industrial computer, the circuit adds a battery charge and discharge management device and a storage battery, and combines the use of multiple types of relays, so that the industrial computer can smoothly transition to the safe shutdown state when encountering a planned or unplanned power failure, thereby effectively preventing hard disk damage and ensuring the continuous and stable operation of the ultrasonic flow measurement device.
[0010] The utility model adopts the following technical solutions to achieve the purpose:
[0011] A safety switch circuit of an industrial computer of an ultrasonic current measuring device for a hydroelectric generator unit comprises a battery charge and discharge management device GEI; the battery charge and discharge management device GEI is respectively connected with a front power supply subcircuit, a storage battery BAT, an industrial computer PCM of the ultrasonic current measuring device, a start subcircuit and a stop subcircuit; an excitation coil in the front power supply subcircuit is linked with a normally closed contact in the stop subcircuit, and an excitation coil in the stop subcircuit is linked with a normally closed contact in the start subcircuit; a normally open contact linked with the excitation coil in the start subcircuit is arranged between the connection of the battery charge and discharge management device GEI and the storage battery BAT.
[0012] Specifically, the front power supply sub-circuit is used to receive external power input, and the front power supply sub-circuit includes a power input terminal, an industrial computer power switch QF1 and a power monitoring relay KA1 connected in sequence; the power monitoring relay KA1 is connected to the power input interface of the battery charge and discharge management device GEI; the normally closed contact KA1-1 linked to the excitation coil of the power monitoring relay KA1 is set in the shutdown sub-circuit, which is used to control the on and off of the shutdown sub-circuit.
[0013] Specifically, the shutdown subcircuit includes a battery startup control delay relay KT2 and a shutdown relay KA2 connected in parallel; the normally closed contact KT2-1 linked to the excitation coil of the battery startup control delay relay KT2 is arranged in the startup subcircuit to control the on and off of the startup subcircuit; the normally open contact KA2-2 linked to the excitation coil of the shutdown relay KA2 is connected in parallel to the positive and negative ends of the shutdown signal of the industrial computer PCM of the ultrasonic flow measuring device to control the on and off of the internal shutdown circuit.
[0014] Specifically, the startup subcircuit includes a startup delay relay KT1 and a battery input contactor KM1 connected in parallel; the normally closed contact KT1-1 linked to the excitation coil of the startup delay relay KT1 is connected in parallel to the positive and negative ends of the startup signal of the industrial computer PCM of the ultrasonic flow measurement device, which is used to control the on and off of the internal startup circuit.
[0015] Specifically, the normally open contact KM1 - 1 linked to the excitation coil of the battery input contactor KM1 is provided between the connection of the battery charge and discharge management device GEI and the battery BAT.
[0016] In summary, due to the adoption of this technical solution, the utility model introduces a battery as a backup power source, which can effectively improve the operating stability and data security of the industrial computer, and the beneficial effects brought about are specifically reflected in the following aspects:
[0017] 1. When the industrial computer is turned on, the newly added battery charging mechanism ensures the stable power supply of the industrial computer during normal operation. When a planned shutdown, unplanned power outage or power failure occurs, the battery immediately takes over the power supply task to avoid physical damage or data loss of the industrial computer hard disk due to sudden power outage during the reading and writing process. The entire action process is implemented in a pure hardware manner, and the action is fast and reliable. This design fundamentally eliminates the risk of hard disk damage caused by direct power outages, and ensures the integrity and availability of the system software, applications and historical monitoring data stored in it.
[0018] 2. Through the seamless switching of battery power supply, even in the case of a main power supply interruption, the industrial computer can still maintain effective communication with the ultrasonic flow measurement device for a certain period of time, continuously collect, process and output data, and ensure that the real-time monitoring function of the turbine flow rate is not affected. This is conducive to the hydropower station operators to obtain unit status information in a timely manner, decide on emergency response methods, and ensure the safe and stable operation of the hydropower station.
[0019] 3. The circuit design of the utility model reduces unnecessary hardware impact and software failure by avoiding direct power failure of the industrial computer during operation, which helps to extend the service life of the industrial computer and its internal components (such as hard disk and power module). At the same time, it reduces problems such as frequent restarts and system instability caused by power failure, which also helps to reduce the overall maintenance cost of the industrial computer and improve the cost-effectiveness of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the circuit structure and connection principle of the utility model. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0023] Example 1
[0024] like Figure 1 As shown, a safety switch circuit of an industrial computer of an ultrasonic flow measurement device for a hydropower unit includes a battery charge and discharge management device GEI; the battery charge and discharge management device GEI is respectively connected to a front power supply subcircuit, a battery BAT, an industrial computer PCM of the ultrasonic flow measurement device, a start subcircuit and a stop subcircuit; the excitation coil in the front power supply subcircuit is linked to a normally closed contact in the stop subcircuit, and the excitation coil in the stop subcircuit is linked to a normally closed contact in the start subcircuit; the normally open contact linked to the excitation coil in the start subcircuit is arranged between the connection of the battery charge and discharge management device GEI and the battery BAT.
[0025] This embodiment will combine Figure 1 The components in the above circuit structure are introduced in detail.
[0026] First, the front power supply circuit is used to receive external power input. The front power supply circuit includes a power input terminal, an industrial computer power switch QF1, and a power monitoring relay KA1 connected in sequence; the power monitoring relay KA1 is connected to the power input interface of the battery charge and discharge management device GEI; the normally closed contact KA1-1 linked to the excitation coil of the power monitoring relay KA1 is set in the shutdown subcircuit to control the on and off of the shutdown subcircuit. The industrial computer power switch QF1 here will be the main operation object of the operator's daily work. Its function is to close the switch to turn on the industrial computer, and open the switch to turn off the industrial computer.
[0027] In this embodiment, the charge and discharge interface of the battery charge and discharge management device GEI is connected to the battery BAT; the power output interface of the battery charge and discharge management device GEI is connected in parallel to the ultrasonic flow measurement device industrial computer PCM, the startup subcircuit and the shutdown subcircuit.
[0028] As a mature technology in this field, the battery charge and discharge management device GEI can be selected and set according to the actual situation. It can be connected to the battery BAT and the power load, and can also be connected to an external power supply input. It can charge the battery BAT and directly output the external power supply to the power load; when there is no external power supply input, the power of the battery BAT is output to the power load. The specific implementation method of this device is well known to those skilled in the art and will not be repeated here.
[0029] In this embodiment, the shutdown subcircuit includes a battery input control delay relay KT2 and a shutdown relay KA2 connected in parallel; a normally closed contact KT2-1 linked to the excitation coil of the battery input control delay relay KT2 is set in the startup subcircuit to control the on-off of the startup subcircuit. Among them, the normally closed contact KT2-1 is a delayed disconnection contact. The normally open contact KA2-2 linked to the excitation coil of the shutdown relay KA2 is connected in parallel to the positive and negative ends of the shutdown signal of the industrial computer PCM of the ultrasonic flow measurement device to control the on-off of the internal shutdown circuit.
[0030] The ultrasonic flow measuring device industrial computer PCM has a start-up circuit and a shutdown circuit inside. When the ultrasonic flow measuring device industrial computer PCM has power input, the start-up signal or shutdown signal brought by the on-off of the start-up circuit or the shutdown circuit is the key factor that determines whether the ultrasonic flow measuring device industrial computer PCM starts or stops. This is also an existing mature technology or common knowledge in this field and will not be elaborated here.
[0031] In this embodiment, the excitation coil of the shutdown relay KA2 is also linked to the normally open contact KA2-1, and the normally open contact KA2-1 is connected to the two ends of the normally closed contact KA1-1 to achieve self-locking of the shutdown relay KA2, that is, when the normally closed contact KA1-1 is connected to the shutdown sub-circuit, since the excitation coil of the shutdown relay KA2 is energized, the normally open contact KA2-1 will be linked and attracted, so that the shutdown sub-circuit is always connected until the power supply from the battery charge and discharge management device GEI disappears.
[0032] In this embodiment, the startup subcircuit includes a startup delay relay KT1 and a battery input contactor KM1 connected in parallel; the normally closed contact KT1-1 linked to the excitation coil of the startup delay relay KT1 is connected in parallel to the positive and negative ends of the startup signal of the industrial computer PCM of the ultrasonic flow measurement device, which is used to control the on-off of the internal startup circuit. Among them, the normally closed contact KT1-1 is a delayed disconnection contact. The normally open contact KM1-1 linked to the excitation coil of the battery input contactor KM1 is set between the connection of the battery charge and discharge management device GEI and the battery BAT.
[0033] The delay time of the two delayed disconnection contacts (ie, the normally closed contact KT2-1 and the normally closed contact KT1-1) can be set according to actual needs, for example, referring to the safe on / off time of the industrial computer PCM of the ultrasonic flow measurement device.
[0034] In this embodiment, a battery charge and discharge management device GEI, a battery BAT, and a matching switch sub-circuit are added to the switch circuit of the industrial computer PCM of the ultrasonic flow measurement device. When the power switch QF1 of the industrial computer is closed, the industrial computer receives a start-up signal, and the battery BAT starts to charge. When the power switch QF1 of the industrial computer is opened, the industrial computer receives a shutdown signal. At this time, the battery BAT discharges and continues to supply power to the industrial computer, avoiding direct power failure of the industrial computer. After the industrial computer is shut down, the battery BAT is cut off.
[0035] Example 2
[0036] By applying the safety switch circuit structure of Example 1, this embodiment introduces in detail the startup process of the industrial computer PCM of the ultrasonic flow measurement device.
[0037] The power switch QF1 of the industrial computer is closed, the excitation coil of the power monitoring relay KA1 is energized, and the normally closed contact KA1-1 is disconnected; the excitation coil of the battery input control delay relay KT2 is de-energized, and the normally closed contact KT2-1 remains closed, so that the excitation coil of the battery input contactor KM1 is energized, the normally open contact KM1-1 is closed, and the battery BAT starts to charge.
[0038] At the same time, when the normally closed contact KT2-1 remains in the closed state, the excitation coil of the power-on delay relay KT1 is also energized, but the normally closed contact KT1-1 will remain in the closed state during the delay time. Since the ultrasonic flow measurement device industrial computer PCM has obtained the power input from the battery charge and discharge management device GEI when the industrial computer power switch QF1 is closed, the power-on circuit connected by the closure of the normally closed contact KT1-1 generates a power-on signal and starts to start. After the set delay time (such as 2 minutes), the ultrasonic flow measurement device industrial computer PCM completes the power-on. At this time, the normally closed contact KT1-1 is disconnected after reaching the delay time, and the entire power-on startup process is completed.
[0039] Example 3
[0040] By applying the safety switch circuit structure of Example 1, this embodiment introduces in detail the safety shutdown process of the industrial computer PCM of the ultrasonic flow measurement device.
[0041] When the industrial computer power switch QF1 is opened, or the power input terminal fails, the excitation coil of the power monitoring relay KA1 loses power and the normally closed contact KA1-1 closes; due to the action of the battery charge and discharge management device GEI, the power output interface is still supplied with power at this time, and the supply source is the battery BAT.
[0042] Due to the closure of the normally closed contact KA1-1, the excitation coils of the shutdown relay KA2 and the battery-operated control delay relay KT2 are energized at the same time; the normally open contact KA2-1 and the normally open contact KA2-2 are both closed, the former maintains the energized self-locking of the shutdown relay KA2 and the shutdown sub-circuit in which it is located, and the latter connects the shutdown circuit of the ultrasonic flow measuring device industrial computer PCM, generates a shutdown signal, and the ultrasonic flow measuring device industrial computer PCM starts to execute the shutdown operation.
[0043] When the excitation coil of the battery input control delay relay KT2 is energized at this time, since the normally closed contact KT2-1 will remain in a closed state during the delay time, the state of the battery input contactor KM1 and the power-on delay relay KT1 will be the same as the state of the ultrasonic flow measurement device industrial computer PCM before shutdown, that is, the battery BAT is still connected and discharged, and the normally closed contact KT1-1 is still in a disconnected state because the delay has expired during the power-on startup process.
[0044] After the set delay time (such as 2 minutes), the industrial computer PCM of the ultrasonic flow measuring device completes the shutdown, and the normally closed contact KT2-1 is disconnected after the delay time is reached, causing the excitation coils of the battery input contactor KM1 and the start-up delay relay KT1 to lose power, the normally open contact KM1-1 is disconnected, the battery BAT is cut off, and the battery charge and discharge management device GEI no longer outputs power; at the same time, the normally closed contact KT1-1 is restored to a closed state due to the loss of power to the excitation coil of the start-up delay relay KT1. At this point, the entire safety shutdown process ends, and the startup process is carried out again after waiting for the next closing of the industrial computer power switch QF1 or the power input fault is repaired.
Claims
1. A safety switch circuit for an industrial computer of an ultrasonic flow measurement device for a hydroelectric generator set, characterized in that: It comprises a battery charge and discharge management device GEI; the battery charge and discharge management device GEI is respectively connected with a front power supply sub-circuit, a storage battery BAT, an ultrasonic current measuring device industrial computer PCM, a start sub-circuit and a stop sub-circuit; the excitation coil in the front power supply sub-circuit is linked with a normally closed contact in the stop sub-circuit, and the excitation coil in the stop sub-circuit is linked with a normally closed contact in the start sub-circuit; the normally open contact linked with the excitation coil in the start sub-circuit is arranged between the connection of the battery charge and discharge management device GEI and the storage battery BAT.
2. The safety switch circuit of the industrial computer of the ultrasonic flow measurement device of the hydropower unit according to claim 1 is characterized by: The front power supply subcircuit is used to receive external power input. The front power supply subcircuit includes a power input terminal, an industrial computer power switch QF1 and a power monitoring relay KA1 connected in sequence; the power monitoring relay KA1 is connected to the power input interface of the battery charge and discharge management device GEI; the normally closed contact KA1-1 linked to the excitation coil of the power monitoring relay KA1 is set in the shutdown subcircuit to control the on and off of the shutdown subcircuit.
3. The safety switch circuit of the industrial computer of the ultrasonic flow measurement device of the hydropower unit according to claim 2 is characterized by: The charging and discharging interface of the battery charging and discharging management device GEI is connected to the storage battery BAT; the power output interface of the battery charging and discharging management device GEI is connected in parallel to the industrial computer PCM of the ultrasonic flow measurement device, the startup subcircuit and the shutdown subcircuit.
4. The safety switch circuit of the industrial computer of the ultrasonic flow measurement device of the hydroelectric generator set according to claim 2 is characterized by: The shutdown subcircuit includes a battery input control delay relay KT2 and a shutdown relay KA2 connected in parallel; a normally closed contact KT2-1 linked to the excitation coil of the battery input control delay relay KT2 is arranged in the startup subcircuit to control the on and off of the startup subcircuit.
5. The safety switch circuit of the industrial computer of the ultrasonic flow measurement device of the hydroelectric generator set according to claim 4 is characterized in that: The normally closed contact KT2-1 is a delayed opening contact.
6. The safety switch circuit of the industrial computer of the ultrasonic flow measurement device of the hydroelectric generator set according to claim 4 is characterized by: The normally open contact KA2-2 linked to the excitation coil of the shutdown relay KA2 is connected in parallel to the positive and negative ends of the shutdown signal of the industrial computer PCM of the ultrasonic flow measurement device to control the on and off of the internal shutdown circuit.
7. The safety switch circuit of the industrial computer of the ultrasonic flow measurement device of the hydroelectric generator set according to claim 4 is characterized by: The normally open contact KA2-1 linked to the excitation coil of the shutdown relay KA2 is connected to both ends of the normally closed contact KA1-1 to achieve self-locking of the shutdown relay KA2.
8. The safety switch circuit of the industrial computer of the ultrasonic flow measurement device of a hydroelectric generator set according to claim 1 is characterized in that: The startup subcircuit includes a startup delay relay KT1 and a battery input contactor KM1 connected in parallel; the normally closed contact KT1-1 linked to the excitation coil of the startup delay relay KT1 is connected in parallel to the positive and negative ends of the startup signal of the industrial computer PCM of the ultrasonic flow measurement device to control the on and off of the internal startup circuit.
9. The safety switch circuit of the industrial computer of the ultrasonic flow measurement device of the hydroelectric generator set according to claim 8, characterized in that: The normally closed contact KT1-1 is a delayed opening contact.
10. The safety switch circuit of the industrial computer of the ultrasonic flow measurement device of the hydroelectric generator set according to claim 8, characterized in that: The normally open contact KM1-1 linked to the excitation coil of the battery input contactor KM1 is set between the connection of the battery charge and discharge management device GEI and the battery BAT.