Anti-interference electricity control device for sulfuric acid dry suction pump
By designing the anti-shaking control device of the sulfuric acid dry-sucking acid pump, the combination of circuit breaker, frequency converter, shaking monitoring controller and DC screen is used to solve the impact of the power grid shaking on sulfuric acid production equipment during the thunderstorm season, and the stable operation and production continuity of the equipment are achieved.
Patent Information
- Application Number
- CN202421182481.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The existing technology is difficult to effectively prevent the impact of power shaking in the power grid on sulfuric acid production equipment during the thunderstorm season, resulting in equipment tripping and shutting down, resulting in production interruptions and economic losses.
A sulfuric acid dry acid suction pump anti-shaking control device is designed, including a circuit breaker, a frequency converter, a shaking monitoring controller and a DC screen. By connecting a series circuit breaker, parallel normally open contacts and setting a shaking reset switch, the control of the inverter and the motor is realized to ensure that the equipment continues to operate when the shaking occurs.
It effectively prevents equipment tripping and shutdown caused by power shaking, ensures stable operation of the equipment, avoids production interruptions and economic losses, and improves work reliability.
Smart Images
Figure CN222602103U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti-electrical shaking of electrical equipment, in particular to an anti-electrical shaking control device for a sulfuric acid dry suction pump. Background Art
[0002] "Power sway" generally refers to a short-term power failure caused by lightning strikes, ground short circuits, power plant failures and other external or internal reasons, which causes a short-term large fluctuation in power grid voltage or even a short power outage of several seconds. The short-term undervoltage caused by the power sway will cause the inverter to trip and stop, and the motor will also stop due to power failure, thus interrupting the continuous production process and causing great damage to production and equipment.
[0003] Sulfuric acid production requires strong continuity, and its production line is relatively long and the process control is complex. The key large-scale equipment must be controlled in an interlocking manner, that is, when one of the equipment fails and stops, the entire production line must automatically shut down in an interlocking manner, otherwise the equipment will be damaged and even casualties will be caused. Therefore, the continuous and stable operation of key and important equipment must be guaranteed. Otherwise, once a tripping shutdown occurs, all production systems will automatically stop, causing great economic losses. At the same time, a large amount of sulfur dioxide, sulfur trioxide gas and acidic wastewater will leak out of the production area, seriously affecting the relationship between miners and farmers. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a sulfuric acid dry suction acid pump anti-electrical shaking control device, especially in the case of electric shaking during thunderstorms, to ensure the stable operation of the equipment.
[0005] In order to achieve the above objectives, the technical solution adopted by the utility model is:
[0006] A sulfuric acid dry acid absorption pump anti-electricity shaking control device, comprising a circuit breaker, wherein the circuit breaker is connected in series to a phase line connected to a frequency converter;
[0007] The frequency converter is electrically connected to the motor and the power sway monitoring controller respectively; wherein,
[0008] The two ends of the frequency converter are connected in parallel with 1KA3 normally open contacts;
[0009] The power fluctuation monitoring controller is provided with a power fluctuation reset switch HD1, and two ends of the power fluctuation monitoring controller are connected in parallel with 1KA4 normally open contacts.
[0010] In some embodiments, a DC screen is included, and the DC screen is electrically connected to the frequency converter.
[0011] In some embodiments, a control circuit is included, wherein both ends of the control circuit are respectively connected to the input end and the output end of the DC panel; the control circuit includes a normally closed contact of a relay 4KA, a start switch 1SB2, a stop switch 1SB4, and a relay 1KA coil connected in series in sequence; both ends of the start switch 1SB2 are connected in parallel with a normally open contact of a relay 1KA1, a normally open contact of DCS1, a start switch 2SB2, and a power-swing reset switch HD1.
[0012] In some embodiments, the two ends of the stop switch 1SB4 and the relay 1KA coil are respectively connected in parallel with an operation indicator light 1RD and an operation indicator light 2RD.
[0013] In some embodiments, a second control loop is included, and both ends of the second control loop are connected in parallel to the control loop, which includes a DCS2 normally open contact and a relay 4KA coil connected in series in sequence.
[0014] In some embodiments, a fault indication circuit is included, and both ends of the fault indication circuit are connected in parallel to the control circuit, which includes a frequency converter 30C-30A normally open contact and a relay 3KA coil connected in series in sequence, and both ends of the relay 3KA coil are connected in parallel with a fault indicator light.
[0015] In some embodiments, a power indicator light 1WH and a power indicator light 2WH are included, which are respectively connected in parallel at two ends of the control loop.
[0016] The beneficial effects of the utility model are as follows: through the structures such as the power shaking monitoring controller and the frequency converter, the safe and stable operation of the equipment when power shaking occurs is guaranteed; the DC panel DC power supply control is also adopted, which is stable and reliable to avoid chain shutdown caused by power shaking, thereby improving working reliability. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a principle structure diagram of an anti-electrical shaking control device for a sulfuric acid dry suction pump;
[0018] Figure 2 The control principle diagram of a sulfuric acid dry suction pump anti-electrical shaking control device.
[0019] The markings in the figure are as follows: TA is the current transformer; 1WH~2WH are the power indicator lights; 1GN~2GN are the fault indicator lights; 1RD~2RD are the operation indicator lights; 1KA~4KA are the relays. DETAILED DESCRIPTION
[0020] In order to make the purpose, technical solution and advantages of the utility model clearer and more specific, the content of the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings, rather than all the contents.
[0021] It should be noted that DCS is the abbreviation of Distributed Control System. The DCS system is a new generation of instrument control system in the existing technology that is based on microprocessors and adopts the design principles of decentralized control functions, centralized display operations, and taking into account both division and autonomy and comprehensive coordination.
[0022] like Figure 1 to Figure 2 As shown, the utility model provides a sulfuric acid dry acid absorption pump anti-electrical shaking control device, including a circuit breaker, which is connected in series to a phase line connected to a frequency converter; wherein the circuit breaker can protect the equipment from damage while maintaining the stability of the circuit.
[0023] The frequency converter is electrically connected to the motor and the power sway monitoring controller respectively; wherein,
[0024] There are 1KA3 normally open contacts in parallel at both ends of the inverter;
[0025] The power swing monitoring controller is provided with a power swing reset switch HD1, and 1KA4 normally open contacts are connected in parallel at both ends of the power swing monitoring controller.
[0026] Among them, the power sway monitoring controller can detect the power supply voltage, current signal and start signal (1KA4 normally open contact) in real time during the operation of the equipment, confirm whether power sway occurs when the motor is running, and if the grid voltage suddenly sways, the grid voltage will quickly return to normal within the set time, so that the equipment can resume operation and avoid production accidents. When the power sway monitoring controller detects that the power supply voltage and current signals are greater than or equal to the preset value and the start signal 1KA4 normally open contact is in a closed state, the motor is in a normal operating state. When the power sway monitoring controller detects that the power supply voltage and current signals are less than the preset value and the start signal 1KA4 normally open contact is in a closed state, power sway (pressure loss within 0.2S) will cause the relay 1KA coil to lose power, the relay 1KA1 contact is disconnected, and the inverter stops operating; but because the power sway monitoring controller can force the output of the inverter's control circuit, that is, the power sway reset switch HD1 remains closed, the relay 1KA coil remains energized, and the relay 1KA3 contact is closed to keep the control inverter and motor running, ensuring the stable operation of the equipment.
[0027] Afterwards, close the DCS system start switch, that is, the normally open contact of DCS1 becomes closed, and the control circuit where the DCS1 contact is located is connected, so that the coil of relay 1KA is energized again, and the normally open contact of 1KA1 closes and self-holds, and its circuit is connected again. The inverter operation indicator lights 1RD and 2RD continue to light up, keeping the inverter and motor running, thereby avoiding the occurrence of chain shutdown.
[0028] In some embodiments, a DC screen is included, and the DC screen is electrically connected to the frequency converter. Once a power shake occurs, the power supply of the frequency converter is changed to the DC screen because the power shake monitoring controller can force the output of the control circuit of the frequency converter. That is, the DC screen can be used to control the start and stop control signals of the frequency converter at this time, so as to ensure stable and reliable power supply, and electronic components such as DC relays are not affected by power shakes in the power grid, and the motor continues to run smoothly, thereby avoiding the occurrence of chain shutdowns and improving work reliability.
[0029] Preferably, it includes a control circuit, the two ends of which are respectively connected to the input end and the output end of the DC panel; the control circuit includes a normally closed contact of relay 4KA, a start switch 1SB2, a stop switch 1SB4, and a relay 1KA coil connected in series in sequence; the two ends of the start switch 1SB2 are connected in parallel with a normally open contact of relay 1KA1, a normally open contact of DCS1, a start switch 2SB2, and a power-shaking reset switch HD1; that is, when the start switch 1SB2 or 2SB2 is pressed, the relay 1KA coil is energized, the normally open contact of relay 1KA1 is closed, the relay 1KA forms a self-locking state, the inverter rotates, the motor runs, and the inverter operation indicator lights 1RD and 2RD light up; another contact 1KA2 of relay 1KA goes to the inverter to control the inverter operation, and the inverter controls the motor to rotate; when the stop switch 1SB4 is pressed, the relay 1KA coil loses power, the contact of relay 1KA1 is disconnected, the inverter stops, and the motor stops.
[0030] Preferably, the two ends of the stop switch 1SB4 and the relay 1KA coil are respectively connected in parallel with an operation indicator light 1RD and an operation indicator light 2RD, which can intuitively display the operating status of the circuit.
[0031] Preferably, a second control circuit is included, and the two ends of the second control circuit are connected in parallel to the control circuit, which includes the normally open contact of DCS2 and the coil of relay 4KA connected in series. When it is necessary to stop working, the stop switch of the DCS system is closed, that is, the normally open contact of DCS2 is closed, the coil of relay 4KA is energized and attracted, the normally closed contact of relay 4KA is disconnected, and the coil of relay 1KA loses power. After that, the contact of relay 1KA is disconnected, the inverter stops running, and the motor stops running. After that, the contact of DCS2 is disconnected, the coil of relay 4KA loses power, and the contact of relay 4K is closed. Then, the start switch of the DCS system is pressed, so that the contact of DCS1 is closed, the coil of relay 1KA is energized, the normally open contact of relay 1KA1 is closed, and relay 1KA forms a self-locking, the variable frequency operation indicator lights 1RD and 2RD light up, the inverter rotates, and the inverter restarts to realize the restart control; wherein, the inverter is equipped with a power-shaking restart function to effectively avoid, thereby ensuring the safe and stable operation of the equipment, thereby avoiding the occurrence of chain shutdown.
[0032] Preferably, it also includes a fault indication circuit, the two ends of which are connected in parallel to the control circuit, and include the normally open contacts of the frequency converter 30C-30A and the relay 3KA coil which are connected in series in sequence, and the two ends of the relay 3KA coil are connected in parallel with a fault indicator light. If the fault protection circuit detects that the frequency converter has a fault, the normally open contacts of the frequency converter 30C-30A are electrically closed, the relay 3KA coil is energized, and the fault indicator lights 1GN and 2GN light up, which serve as a fault prompt for the frequency converter.
[0033] Preferably, a power indicator light 1WH and a power indicator light 2WH are included, which are respectively connected in parallel at both ends of the control loop to monitor the power status.
[0034] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. A sulfuric acid dry suction pump anti-power sway control device, including a circuit breaker, characterized in that: The circuit breaker is connected in series to the phase line connected to the frequency converter; The frequency converter is electrically connected to the motor and the power sway monitoring controller respectively; wherein, The two ends of the frequency converter are connected in parallel with 1KA3 normally open contacts; The power fluctuation monitoring controller is provided with a power fluctuation reset switch HD1, and two ends of the power fluctuation monitoring controller are connected in parallel with 1KA4 normally open contacts.
2. The anti-electricity shaking control device for sulfuric acid dry suction pump according to claim 1 is characterized in that: It includes a DC screen, which is electrically connected to the frequency converter.
3. The anti-electricity shaking control device for sulfuric acid dry suction pump according to claim 2 is characterized in that: It includes a control circuit, the two ends of which are respectively connected to the input end and the output end of the DC panel; the control circuit includes a relay 4KA normally closed contact, a start switch 1SB2, a stop switch 1SB4, and a relay 1KA coil connected in series in sequence; the two ends of the start switch 1SB2 are connected in parallel with a relay 1KA1 normally open contact, a DCS1 normally open contact, a start switch 2SB2, and a power-shake reset switch HD1.
4. The anti-electricity shaking control device for sulfuric acid dry suction pump according to claim 3 is characterized in that: The two ends of the stop switch 1SB4 and the relay 1KA coil are respectively connected in parallel with an operation indicator light 1RD and an operation indicator light 2RD.
5. The anti-electricity shaking control device for sulfuric acid dry suction pump according to claim 3 is characterized in that: It includes a second control loop, both ends of which are connected in parallel to the control loop, and includes a DCS2 normally open contact and a relay 4KA coil connected in series in sequence.
6. The anti-electricity shaking control device for sulfuric acid dry suction pump according to claim 3 is characterized in that: It includes a fault indication circuit, both ends of which are connected in parallel to the control circuit, and includes a frequency conversion 30C-30A normally open contact and a relay 3KA coil which are connected in series in sequence, and both ends of the relay 3KA coil are connected in parallel with a fault indicator light.
7. The anti-electricity shaking control device for sulfuric acid dry suction pump according to claim 3 is characterized in that: It comprises a power indicator light 1WH and a power indicator light 2WH, which are respectively connected in parallel at two ends of the control loop.