Vacuum screw pump set power-on self-starting control system

Abstract

The application provides a vacuum screw pump group power-on self-starting control system, which comprises a vacuum screw pump group, an electric detection module, a monitoring module, a power supply module and a self-starting module; the vacuum screw pump group comprises a screw pump and a Roots pump; the electric detection module is connected with a power supply circuit of the vacuum screw pump group and is used for detecting power-on information and power-off information of the power supply circuit; the monitoring module is connected with the electric detection module and is used for detecting a power-off duration of the vacuum screw pump group; the self-starting module is connected with the electric detection module and the vacuum screw pump group and is used for driving the vacuum screw pump group to operate when the power-off duration is less than a set duration; and the power supply module is connected with the electric detection module and is used for supplying power when the power is off. The vacuum screw pump group power-on self-starting control system can be self-started when the vacuum screw pump group is powered on again after power-off, so that the influence on the production efficiency and the production process of the applied equipment of the vacuum screw pump group is reduced, and the production stop rate of photovoltaic equipment after long-time operation can be reduced.

Description

Technical Field

[0001] This application relates to the field of vacuum screw pump technology, specifically to a vacuum screw pump self-starting control system upon power-on. Background Technology

[0002] When vacuum screw pump units are used in the photovoltaic crystal pulling industry, due to the unique characteristics of the photovoltaic industry, unstable external environmental factors and the special nature of photovoltaic equipment often cause abnormal power supply fluctuations and short-term power outages, which in turn lead to power loss and shutdown of the vacuum screw pump units. Furthermore, as the operating time of the photovoltaic equipment increases, the probability of power outages due to abnormal factors gradually increases, resulting in more frequent and prolonged power outages, significantly impacting the production efficiency of the photovoltaic equipment.

[0003] If the host computer fails to return to normal or fails to send a start signal to the vacuum screw pump unit in a timely manner after the photovoltaic equipment is powered back, the vacuum screw pump unit will remain in a stopped state and will be unable to continue operating, which will affect the crystal pulling equipment's production process.

[0004] Therefore, there is room for further improvement in the existing technology for vacuum screw pump sets. Utility Model Content

[0005] In view of this, and in response to the technical problem in the prior art that vacuum screw pump sets cannot automatically start after power loss and power restoration, this application provides a vacuum screw pump set power restoration automatic start control system, which can automatically start the vacuum screw pump set when power is restored after power loss, so as to reduce the impact on the production efficiency and production process of its application equipment.

[0006] This application provides a power-on self-starting control system for a vacuum screw pump unit, including:

[0007] Vacuum screw pump sets, including screw pumps and Roots pumps;

[0008] The electrical testing module is connected to the power supply circuit of the vacuum screw pump unit and is used to detect the power supply circuit's power-on and power-off information.

[0009] The monitoring module, connected to the electrical measurement module, is used to detect the duration of power failure of the vacuum screw pump unit;

[0010] The self-starting module is connected to the monitoring module and the vacuum screw pump unit, and is used to drive the vacuum screw pump unit to run when the power failure time is less than the set time.

[0011] The power supply module, connected to the power testing module, is used to provide power in the event of a power outage.

[0012] Compared with existing technologies, the vacuum screw pump group self-start control system of this application uses an electrical measurement module to detect the power failure and power restoration status of the vacuum screw pump group in a timely manner, and then issues different commands and signals to enable the vacuum screw pump group to automatically start when power is restored. This avoids the situation where the vacuum screw pump group fails to start after power failure and is restored without human intervention, thus affecting the production efficiency and process of photovoltaic crystal pulling equipment. Furthermore, it can mitigate the impact of power failure anomalies on photovoltaic equipment as the operating time increases, thereby ensuring the production quality and efficiency of photovoltaic equipment during long-term operation. The monitoring module can monitor the power failure duration of the vacuum screw pump group. When the power failure duration is less than a set duration, it issues a start-up signal to the self-start module, enabling the self-start module to control the operation of the vacuum screw pump group without human intervention, saving labor costs and improving production efficiency. The power backup module can supply power to the monitoring module during power failure, ensuring the normal operation of the monitoring module, and thus ensuring the normal operation of the self-start control system for the vacuum screw pump group's self-start function.

[0013] Preferably, the monitoring module includes:

[0014] The timing module is connected to the electrical testing module to record the power outage time, power restoration time, and power outage duration.

[0015] The storage module, connected to the electrical measurement module, is used to acquire and store the operating data of the vacuum screw pump unit at the moment of power failure.

[0016] In this embodiment, the timing module and the storage module work together to obtain the duration of power failure and the operating status of the vacuum screw pump group at the moment of power failure, so that the self-starting module can start the vacuum screw pump group according to the set conditions to ensure the production efficiency of the photovoltaic equipment.

[0017] Preferably, the self-starting module includes:

[0018] The calculation module is used to compare the duration of power failure with the set duration;

[0019] The control module is used to control the vacuum screw pump unit to operate according to the operating state at the moment of power failure.

[0020] In this embodiment, the operation of the vacuum screw pump group can be controlled to complete self-starting when the start-up conditions are met through the calculation module and the control module.

[0021] Preferably, the electrical measurement module includes a gain / loss detection module and a trigger module;

[0022] The power gain / loss detection module is connected to the power supply circuit and is used to transmit power loss information to the trigger module;

[0023] The triggering module is connected to the power protection module and is used to trigger the power protection module to operate when a power failure information is received.

[0024] In this embodiment, the power failure detection module and the triggering module work together to detect the power supply and power failure status of the power supply circuit to the vacuum screw pump group in a timely manner, thereby controlling the operation of the power protection module in a timely manner.

[0025] Preferably, the power protection module includes a power supply and a power protection circuit;

[0026] The power supply is connected to the monitoring module through a power protection circuit to provide power to the monitoring module.

[0027] In this embodiment, the backup power supply is an independent power source used to provide power to the self-starting system when the external power supply to the vacuum screw pump unit is interrupted. It can be powered by a lithium battery or similar power source, is easily replaceable, and can charge the power supply in the backup module when the external power supply is active, ensuring the backup module has sufficient power.

[0028] Preferably, the monitoring module further includes:

[0029] The first detection component, located inside the screw pump, is used to detect the operating frequency of the screw pump's inverter and the motor speed.

[0030] The second detection component, located inside the Roots pump, is used to detect the operating frequency of the screw pump's inverter and the motor speed.

[0031] In this embodiment, the first detection component and the second detection component can clearly and accurately detect the operating frequency-related parameters of the screw pump and the Roots pump at the moment of power failure.

[0032] Preferred options also include:

[0033] The self-test module is connected to the power supply circuit and is used to perform a self-test and inspection of the frequency converter of the vacuum screw pump group when power is applied.

[0034] The self-test module is connected to the self-starting module to send instructions to the self-starting module on whether to run based on the self-test results.

[0035] In this embodiment, the self-test module can immediately perform a self-test on the frequency converter of the vacuum screw pump unit after it is powered on. When the self-test result is normal, it indicates that the frequency converter parameters of the vacuum screw pump unit are normal, and the self-starting module can also ensure normal function when driving the vacuum screw pump unit. When the self-test result is abnormal, it indicates that the vacuum screw pump unit is malfunctioning, and the self-starting module should not drive the vacuum screw pump unit.

[0036] Preferred options also include:

[0037] The power loss detection module connects to a host computer or control terminal and is used to prevent the power testing module from operating when a power loss is detected to originate from the host computer or control terminal.

[0038] In this embodiment, the source of power failure can be determined in a timely manner, thereby enabling the self-starting control system to operate normally.

[0039] Preferred options also include:

[0040] The prompt module, connected to the self-starting module, is used to send a prompt signal to the host computer or control terminal when the power failure duration exceeds the set duration.

[0041] In this embodiment, the prompting module can promptly issue prompting signals, enabling staff to understand abnormal information on site in a timely manner and carry out maintenance on the vacuum screw pump unit promptly.

[0042] Preferred options also include:

[0043] A sound player, connected to any one of the host computer, control terminal, or vacuum screw pump unit, is used to emit sound prompt signals;

[0044] The light display screen can be connected to any one of the host computer, control terminal, or vacuum screw pump group to emit light prompt signals.

[0045] In this embodiment, the sound player and the light display screen enable users to quickly and easily obtain prompt signals. Attached Figure Description

[0046] Figure 1 This is a system block diagram of a vacuum screw pump unit self-starting control system provided in an embodiment of this application;

[0047] Figure 2 This is a schematic diagram of the structure of a vacuum screw pump set self-starting control system provided in an embodiment of this application;

[0048] Figure 3 This is a control logic diagram of a vacuum screw pump group self-starting control system provided in an embodiment of this application.

[0049] Reference numerals: 1. Screw pump; 2. Roots pump. Detailed Implementation

[0050] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0051] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0052] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, the above terms should not be construed as limitations on this application.

[0053] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figures 1 to 3 illustrate.

[0054] This application provides a power-on self-starting control system for a vacuum screw pump unit, such as... Figure 1 As shown, this control system is applied to a vacuum screw pump unit. When the vacuum screw pump unit is powered on again due to an abnormal power outage, it automatically controls the vacuum screw pump unit to start automatically. It can achieve automatic start-up without the need for a host computer or control terminal to give the vacuum screw pump unit a start signal. This avoids the situation where the pump unit does not run after power is restored without manual intervention, which would affect the production efficiency of the photovoltaic crystal pulling equipment.

[0055] Specifically, such as Figure 1 As shown, the self-starting control system includes a vacuum screw pump group, an electrical measurement module, a monitoring module, a power protection module, and a self-starting module. The vacuum screw pump group is connected to an external power supply circuit, and it evacuates the photovoltaic crystal pulling equipment when powered on, ensuring the production operation of the photovoltaic crystal pulling equipment.

[0056] The electrical testing module is connected to the external power supply circuit of the vacuum screw pump group and can detect the power failure and power restoration information of the power supply circuit. The power protection module is an independent power supply, which is connected to the monitoring module and the electrical testing module. It can start instantly when power is lost to supply power to the monitoring module. The monitoring module is connected to the electrical testing module and is used to detect the power failure duration of the vacuum screw pump group. The self-starting module is connected to the electrical testing module and is used to drive the vacuum screw pump group to run automatically when the power failure duration is less than the set duration, thereby realizing the self-starting function of the vacuum screw pump group after power failure, which can improve the production efficiency of photovoltaic crystal pulling equipment. Furthermore, for photovoltaic crystal pulling equipment, the longer the operating time, the higher the probability of abnormality and power failure. The self-starting control system of this application can reduce the impact of photovoltaic equipment on production efficiency after long-term operation.

[0057] Furthermore, the electrical testing module is described in detail. The electrical testing module includes a power gain / loss detection module and a trigger module. The power gain / loss detection module is connected to the power supply circuit. It determines whether the vacuum screw pump unit is currently powered down or powered up by detecting the instantaneous change in the electrical signal between low and high levels in the power supply circuit, and transmits the power loss information to the trigger module. The trigger module is connected to the power backup module. It can trigger the power backup module to operate when power is lost, thereby supplying power to other modules, or trigger the power backup module to stop operating when power is restored, saving energy consumption of the power backup module.

[0058] The electrical measurement module also includes a power supply detection module, which is connected to a host computer or control terminal. When the control terminal or host computer issues a power-off command to the vacuum screw pump group, the command simultaneously triggers the power supply detection module. At the same time, the power supply detection module detects the power loss information. Based on the power loss information and the fact that the power loss originated from the control terminal, it is concluded that the power loss of the vacuum screw pump group originated from the control terminal or host computer. This indicates that the power loss of the vacuum screw pump group was actively caused by the staff or the set program, indicating that the power loss is not due to an abnormality in the operation of the photovoltaic equipment. Therefore, it is not necessary to activate the self-starting module to avoid resource waste or miscontrol.

[0059] Furthermore, the monitoring module is described in detail. The monitoring module includes a timing module and a storage module. The timing module is connected to both the electrical measurement module and the power preservation module. When the electrical measurement module detects a power outage or restoration, it sends a marker signal to the timing module. Based on this marker signal, the timing module records the power outage time and the restoration time, and calculates the power outage duration by the difference between the restoration time and the power outage time. The storage module is connected to the electrical measurement module. When the electrical measurement module detects a power outage, the storage module can acquire and store the operating status data of the vacuum screw pump unit at the instant of power outage.

[0060] Among them, the power supply module can continuously supply power to the timing module and the storage module during power failure, thereby ensuring that the timing module can continue timing and the storage module can continuously save the operating status data of the vacuum screw pump group at the moment of power failure.

[0061] The monitoring module further includes a first detection component and a second detection component. The first detection component is located inside the screw pump and is used to detect the operating frequency of the screw pump's inverter and the motor speed. The second detection component is located inside the Roots pump and is used to detect the operating frequency of the screw pump's inverter and the motor speed. Both the first and second detection components include inverter detection sensors and motor detection sensors to obtain the corresponding pump's inverter operating frequency and motor speed, and transmit this data to the storage module or a host computer.

[0062] It should be noted that the first and second detection components operate in real time. At the moment of power failure, the electrical testing module sends a trigger signal to the first and second detection components, which then transmit the data at the moment of power failure to the storage module, enabling the storage module to save the operating status data of the vacuum screw pump unit at the moment of power failure.

[0063] Furthermore, the self-starting module is described in detail. The self-starting module includes a calculation module and a control module. The calculation module is connected to the timing module, which can obtain the power outage duration of the timing module and compare it with the set duration to obtain the comparison result. The control module is connected to the storage module. When the power outage duration is less than the set duration, the calculation module sends a trigger signal to the control module. The control module reads the operating status data of the vacuum screw pump group at the moment of power outage from the storage module and issues instructions to the drive system of the vacuum screw pump group to control the vacuum screw pump group to operate according to the operating status data. This ensures that the vacuum screw pump group can maintain synchronization with the state before power outage, allowing the pumping speed of the vacuum screw pump group to match the needs of the photovoltaic crystal pulling equipment before power outage, thereby reducing the impact on the photovoltaic crystal pulling equipment.

[0064] Specifically, when the comparison result obtained by the calculation module is that the power failure duration is longer than the set duration, the calculation module will not send a trigger signal to the control module, and the vacuum screw pump unit will not start automatically.

[0065] Furthermore, the power supply module is described in detail. The power supply module includes a power supply and a power supply circuit. The power supply is an independent power supply used to provide power to the monitoring module when the external power supply of the vacuum screw pump group is interrupted. It can be powered by a lithium battery or other power source, which is easy to replace. When the external power supply is connected, it can charge the power supply in the power supply module to ensure that the power supply module has sufficient power. The power supply is connected to the monitoring module through the power supply circuit to provide power to the monitoring module.

[0066] It should be noted that during a power outage, the power-saving module supplies power to at least the monitoring module, and can also supply power to the alert power testing module, the self-starting module, etc.; however, after power is restored, the power-saving module cuts off power to all modules, and the external power supply circuit can connect to the power-saving circuit to charge the power supply.

[0067] Based on any of the above embodiments, the self-starting control system is further extended. In this embodiment, the self-starting control system also includes a prompting module, which is connected to the self-starting module. When the calculation module of the self-starting module calculates that the power outage duration exceeds the set duration, the calculation module sends a trigger signal to the prompting module, causing the prompting module to send a prompt signal to the host computer or control terminal, so as to prompt the staff to know the current operating status of the vacuum screw pump group in a timely manner. In case of other abnormal phenomena when the power outage time is too long, it helps the staff to troubleshoot abnormal factors in a timely manner, which is beneficial to the maintenance of the vacuum screw pump group, increases the safety standard of the use of on-site equipment, and also reduces the impact of the vacuum screw pump group's long interruption of operation on the production of photovoltaic crystal pulling equipment.

[0068] The self-starting control system also includes a sound player and / or a light display screen. The sound player is installed on any one of the host computer, control terminal, or vacuum screw pump group to emit sound prompts to the staff. Sound prompts can enhance the prompting effect and make it convenient for users to know quickly and clearly. The light display screen is installed on any one of the host computer, control terminal, or vacuum screw pump group to emit light prompts to make the staff aware of the prompts. Light prompts can reduce the impact of noise and are relatively quiet.

[0069] In practical use, you can set only sound or light prompts, or you can include both sound and light prompts.

[0070] Based on any of the above embodiments, the self-starting control system is further extended; in this embodiment, the self-starting control system also includes a self-test module, which is connected to the power supply circuit and is used to perform self-test and inspection of the frequency converter of the vacuum screw pump group when power is applied, and to detect various operating parameters such as the communication function and electrical connection status of the frequency converter.

[0071] Specifically, the self-test module operates immediately upon power-up of the vacuum screw pump unit to obtain self-test results. When the self-test result is normal, the self-test module sends a signal to the self-starting module indicating that it can operate. When the self-test result is abnormal, the self-test module sends a stop signal to the self-starting module, causing it to stop operating. The self-test module can immediately perform a self-test check on the frequency converter of the vacuum screw pump unit after power-up. When the self-test result is normal, it indicates that the frequency converter parameters of the vacuum screw pump unit are normal, and the self-starting module can ensure normal function when driving the vacuum screw pump unit. When the self-test result is abnormal, it indicates that the vacuum screw pump unit is malfunctioning, and the self-starting module should not drive the vacuum screw pump unit.

[0072] When the self-test result is abnormal, the self-test module sends a signal to the prompting module. The prompting module then alerts the operator to the abnormality of the frequency converter in the vacuum screw pump unit, enabling staff to promptly troubleshoot and repair the frequency converter and ensure the operation of the vacuum screw pump unit.

[0073] It should be noted that in this embodiment, the operation of the self-starting module is determined by two signals simultaneously. The first signal is issued by the self-test module, and the second signal is issued by the monitoring module. It can be understood that the self-starting module can only start to control the operation of the vacuum screw pump group when the start conditions of the first signal and the second signal are met simultaneously. If one of the signals does not meet the start condition, the self-starting module will not start the self-starting function of the vacuum screw pump group, but the self-starting module will trigger the prompt module to start to warn the user.

[0074] For example, if the self-test module detects an abnormality in the vacuum screw pump, the self-starting module will not control the vacuum screw pump to run even if the power failure duration detected by the monitoring module is less than the set duration; if the self-test module detects that the vacuum screw pump is normal, the self-starting module will not control the vacuum screw pump to run even if the power failure duration detected by the monitoring module is greater than the set duration.

[0075] When the prompting module is activated, it can issue different prompting signals based on the trigger signals of different modules. For example, when the self-test module issues a trigger signal to the prompting module, the prompting module displays an inverter malfunction; when the monitoring module issues a trigger signal to the prompting module, the prompting module displays a power supply malfunction. This allows staff to quickly understand the source of the malfunction and quickly repair the malfunctioning parts, ensuring the production efficiency of the photovoltaic equipment.

[0076] It should be noted that in this application, the set duration is set to 1 minute and 30 seconds; in actual use, the set duration can be reset according to the on-site requirements to meet the needs of the site.

[0077] The self-starting control system of this application can achieve automatic restart of the vacuum screw pump group after power failure and power restoration without changing the hardware of the vacuum screw pump group, thereby reducing the impact on photovoltaic equipment production. As shown in Table 1, the downtime rate of photovoltaic crystal pulling equipment before and after adopting the self-starting control system of this application is as follows:

[0078]

[0079] Table 1

[0080] According to the following formula:

[0081] Downtime rate = Downtime / Total production time;

[0082] It is evident that after the vacuum screw pump unit uses the control system of this application, as the operating time increases, the downtime rate after the vacuum screw pump unit achieves power-on self-start is significantly reduced, which reduces the impact of power outages caused by abnormal factors during long-term operation of photovoltaic crystal pulling equipment, thereby effectively ensuring the production efficiency of photovoltaic crystal pulling equipment under long-term operation and saving production costs.

[0083] It should be noted that the various embodiments of this application can be arbitrarily combined into new embodiments, provided that the solutions do not conflict and the technical solutions can coexist.

[0084] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A power-on self-starting control system for a vacuum screw pump set, characterized in that, include: Vacuum screw pump sets, including screw pumps and Roots pumps; The electrical testing module is connected to the power supply circuit of the vacuum screw pump unit and is used to detect the power supply circuit's power-on and power-off information. The monitoring module, connected to the electrical measurement module, is used to detect the duration of power failure of the vacuum screw pump unit; The self-starting module is connected to the monitoring module and the vacuum screw pump unit, and is used to drive the vacuum screw pump unit to run when the power failure time is less than the set time. The power supply module, connected to the power testing module, is used to provide power in the event of a power outage.

2. The vacuum screw pump set self-starting control system according to claim 1, characterized in that, The monitoring module includes: The timing module is connected to the electrical testing module to record the power outage time, power restoration time, and power outage duration. The storage module, connected to the electrical measurement module, is used to acquire and store the operating data of the vacuum screw pump unit at the moment of power failure.

3. The vacuum screw pump set self-starting control system according to claim 2, characterized in that, The self-starting module includes: The calculation module is used to compare the duration of power failure with the set duration; The control module is used to control the vacuum screw pump unit to operate according to the operating state at the moment of power failure.

4. The vacuum screw pump set self-starting control system according to claim 1, characterized in that, The electrical measurement module includes an electrical gain / loss detection module and a triggering module; The power gain / loss detection module is connected to the power supply circuit and is used to transmit power loss information to the trigger module; The triggering module is connected to the power protection module and is used to trigger the power protection module to operate when a power failure information is received.

5. The vacuum screw pump set self-starting control system according to claim 1, characterized in that, The power protection module includes a power supply and a power protection circuit; The power supply is connected to the monitoring module through a power protection circuit to provide power to the monitoring module.

6. The vacuum screw pump set self-starting control system according to claim 1, characterized in that, The monitoring module also includes: The first detection component, located inside the screw pump, is used to detect the operating frequency of the screw pump's inverter and the motor speed. The second detection component, located inside the Roots pump, is used to detect the operating frequency of the screw pump's inverter and the motor speed.

7. The vacuum screw pump set self-starting control system according to any one of claims 1 to 6, characterized in that, Also includes: The self-test module is connected to the power supply circuit and is used to perform a self-test and inspection of the frequency converter of the vacuum screw pump group when power is applied. The self-test module is connected to the self-starting module to send instructions to the self-starting module on whether to run based on the self-test results.

8. The vacuum screw pump set self-starting control system according to any one of claims 1 to 6, characterized in that, Also includes: The power loss detection module connects to a host computer or control terminal and is used to prevent the power testing module from operating when a power loss is detected to originate from the host computer or control terminal.

9. The vacuum screw pump set self-starting control system according to any one of claims 1 to 6, characterized in that, Also includes: The prompt module, connected to the self-starting module, is used to send a prompt signal to the host computer or control terminal when the power failure duration exceeds the set duration.

10. The vacuum screw pump set self-starting control system according to claim 9, characterized in that, Also includes: A sound player, connected to any one of the host computer, control terminal, or vacuum screw pump unit, is used to emit sound prompt signals; The light display screen can be connected to any one of the host computer, control terminal, or vacuum screw pump group to emit light prompt signals.

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