Control cabinet of reinjection water integrated system

Abstract

The utility model relates to the technical field of control cabinets, and discloses a control cabinet of a reinjection water integrated system, which comprises a cabinet body front inner door and an overground display provided with a multifunctional human-computer interface and a UCS direct-reading sensor. A main power circuit breaker, a reinjection frequency converter, an electric quantity acquisition module, a vector frequency converter, a main output contactor, an anti-reversal contactor and a reinjection pump output contactor are arranged at the front part of the cabinet body; a control transformer, a power supply filter, a GPRS module, a temperature controller and an external signal terminal are arranged in the rear door of the cabinet body, and the multifunctional human-computer interface is connected with the reinjection frequency converter, the vector frequency converter, the electric quantity acquisition module and the UCS direct-reading sensor ground display through a 485 serial port communication network. According to the integrated control system for the screw pump and the reinjection pump, integrated control over the screw pump and the reinjection pump is achieved, meanwhile, the UCS direct-reading sensor, the ground displayer, the underground pressure sensor and the 485 communication network containing the GPRS module are matched, integrated collection of data is achieved, relevant operation data are uploaded in real time, and the data integration capacity is improved.

Description

Technical Field

[0001] This utility model relates to the field of control cabinet technology, and in particular to a control cabinet for a water reinjection integrated system. Background Technology

[0002] In the field of coalbed methane extraction, submersible direct-drive screw pumps have become the mainstream drainage gas production equipment due to their high efficiency and energy saving characteristics, while the reinjection pump, which stabilizes the liquid level with the help of reinjecting water, is crucial in downhole pressure control. The stability of their coordinated operation directly affects gas production efficiency and process safety. Therefore, the matching control cabinet needs to achieve integrated control and collaborative data management of the two systems. However, in the existing technology, the control systems of submersible direct-drive screw pumps and reinjection pumps are independent, resulting in dispersed equipment layout and cumbersome operation procedures, which makes it difficult to meet the requirements of modern intelligent gas production processes for efficient collaborative control. There is an urgent need for an integrated control cabinet that can integrate the control of the two systems and optimize data interaction.

[0003] The existing control systems for submersible direct-drive screw pumps and reinjection pumps employ an independent architecture design. The submersible direct-drive screw pump control system typically includes an independent frequency converter, sensors, and a local operating panel, providing only single-function control of pump speed and downhole pressure. The reinjection pump control system, on the other hand, is equipped with an independent power module, drive unit, and data display instruments, enabling only local regulation of reinjection flow rate and pressure. The power supply circuits for both systems are isolated, control commands are issued through independent operating interfaces, and data acquisition relies on their respective local storage modules, lacking a unified communication protocol and collaborative control mechanism. This "dual-system separation" technical solution results in redundant hardware configuration, space occupancy, and inefficient operation and maintenance requiring separate procedures for each system.

[0004] The most prominent problem with existing control systems is that the control units for the submersible direct-drive screw pump and the reinjection pump are independent, lacking an integrated layout of electrical components and a coordinated control mechanism. On the one hand, the independent power supply system leads to insufficient stability of the two systems during voltage fluctuations, and the dispersed component layout makes it difficult to construct an orderly power supply link. On the other hand, the independent drive control modules of the two systems cannot achieve dynamic matching between the screw pump speed and the reinjection pump flow rate, which easily leads to control command conflicts or lags during fluid level regulation, resulting in aggravated downhole pressure fluctuations and affecting the stability of the gas production process. In addition, the independent storage and display of data from the two systems, lacking real-time integrated acquisition and uploading functions, makes it difficult to support intelligent fluid level control strategies based on big data analysis, becoming a key bottleneck restricting the automation upgrade of the gas production process. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a control cabinet for an integrated water reinjection system. It aims to improve the problem that the drive control modules of the two systems are independent of each other, making it impossible to achieve dynamic matching between the screw pump speed and the reinjection pump flow. During the liquid level regulation process, control command conflicts or lags are prone to occur, leading to increased downhole pressure fluctuations and affecting the stability of the gas production process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a control cabinet for an integrated water reinjection system, the control cabinet adopting a layered layout, comprising:

[0007] The cabinet's front inner door is equipped with a multi-functional human-machine interface and a UCS direct-reading sensor floor display.

[0008] The front of the cabinet is equipped with a main power circuit breaker, a reinjection frequency converter, a power acquisition module, a vector frequency converter, a main output contactor, an anti-reverse contactor, and a reinjection pump output contactor.

[0009] Inside the rear door of the cabinet are a control transformer, a power filter, a GPRS module, a temperature controller, and external signal terminals.

[0010] Furthermore, the multi-functional human-machine interface is connected to the reinjection frequency converter, vector frequency converter, power acquisition module, and UCS direct-reading sensor ground display via a 485 serial communication network. The wiring adopts a "daisy-chain" method to avoid data interference. The operating data is uploaded to the cloud server via the GPRS module to realize remote monitoring and adjustment.

[0011] Furthermore, the lower front of the cabinet is equipped with a power input terminal, and the rear is equipped with an output terminal, with the power input and motor output arranged separately at the front and rear.

[0012] Furthermore, the multi-functional human-machine interface is used for starting, stopping, speed adjustment, and fault reset operations of screw pumps and reinjection pumps.

[0013] Furthermore, a temperature-controlled cooling fan is installed on the top of the cabinet, which is automatically controlled by a temperature controller.

[0014] Furthermore, the cabinet includes surge protectors, DC holding controllers, secondary control power supplies, secondary control circuit fuses, switching power supplies, intermediate relays, and maintenance sockets for circuit protection, auxiliary control, and debugging power supply.

[0015] Furthermore, the GPRS module is controlled by a GPRS power switch.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, an orderly power supply system is constructed through the reasonable layout and scientific configuration of electrical components such as power input terminals, main power circuit breakers, surge protectors, and control transformers in the control cabinet, providing stable power supply for the secondary circuit. Components such as power filters, power acquisition modules, multi-functional human-machine interfaces, vector frequency converters, and reinjection frequency converters work together to achieve integrated control of the screw pump and reinjection pump, enabling precise driving of both pumps. At the same time, the UCS direct-reading sensor ground display, downhole pressure sensor, and 485 communication network with GPRS module work together to achieve integrated data acquisition, uploading relevant operating data in real time and improving data integration capabilities.

[0018] 2. In this utility model, the control cabinet is equipped with a multi-functional human-machine interface, which allows users to easily set parameters and greatly facilitates the operation of the system by on-site personnel; the maintenance socket provides convenience for debugging power supply, making it easier for on-site personnel to debug and maintain the equipment; the dustproof mesh isolates dust, and the top fan achieves heat dissipation under the control of the temperature controller, ensuring a good working environment for the components inside the control cabinet, reducing failures, and lowering maintenance costs; data is uploaded to the cloud server via the communication module, which facilitates the collection and management of operating data. Staff can obtain and analyze data in real time, promptly identify problems, and improve operational convenience and operational management efficiency. Attached Figure Description

[0019] Figure 1 This is a front view and a side view of the control cabinet of the integrated water reinjection system proposed in this utility model;

[0020] Figure 2 This is a front inner door view of the control cabinet of the integrated water reinjection system proposed in this utility model.

[0021] Figure 3 This is a front view of the internal components of the control cabinet of the integrated water reinjection system proposed in this utility model.

[0022] Figure 4 This is a front view of the internal components installed at the rear of the control cabinet of the integrated water reinjection system proposed in this utility model.

[0023] Legend:

[0024] 1. Multifunctional human-machine interface; 2. UCS direct-reading sensor ground display; 3. Surge protector; 4. Main power circuit breaker; 5. Reinjection pump frequency converter; 6. Power acquisition module; 7. DC holding controller; 8. Main output contactor; 9. Anti-reverse contactor; 10. Vector frequency converter; 11. Reinjection pump output contactor; 12. Secondary control power supply; 13. Secondary control circuit fuse; 14. Control transformer; 15. Switching power supply; 16. Power filter; 17. GPRS module; 18. GPRS power switch; 19. Maintenance socket; 20. Temperature controller; 21. Intermediate relay; 22. External signal terminal; 23. Power input terminal; 24. Output terminal. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 1 - Figure 4 One embodiment of this utility model provides: a control cabinet for a reinjection water integrated system, the control cabinet adopting a layered layout, including:

[0027] The front inner door of the cabinet is equipped with a multi-functional human-machine interface 1 and a UCS direct-reading sensor ground display 2. The multi-functional human-machine interface 1 is equipped with a touch screen and an embedded system. Users can set the operating parameters of the screw pump / reinjection pump through the interface, display the equipment status data in real time, and support historical data query and fault alarm prompts.

[0028] At the front of the cabinet, there is a main power circuit breaker 4, which controls the on and off of the main power supply and has overload and short circuit protection functions; a reinjection frequency converter 5; a power acquisition module 6; a vector frequency converter 10; a main output contactor 8; an anti-reverse contactor 9; and a reinjection pump output contactor 11.

[0029] Inside the rear door of the cabinet is a control transformer 14, which converts the main power supply voltage to a safe low voltage, providing isolated power to control components such as contactors and relays, preventing high voltage from being directly connected to the control circuit and improving safety. A power filter 16 is connected in series with the power supply line, filtering out high-frequency interference signals from the power grid through an LC filter network to ensure the signal accuracy of devices such as the power acquisition module 6 and the frequency converter. A GPRS module 17, a temperature controller 20 and external signal terminals 22, a multi-functional human-machine interface 1, and a reinjection frequency converter 5 are also included. These devices control the reinjection pump flow through PID closed-loop control, combined with a downhole pressure sensor. The data output is automatically adjusted to achieve dynamic matching between the reinjection volume and the screw pump drainage volume, stabilizing the downhole fluid level. The vector inverter 10, employing vector control technology, adjusts the screw pump motor speed according to commands from the multi-functional human-machine interface 1, exhibiting high dynamic response characteristics and a control accuracy of ±0.5%, achieving energy saving and precise drive. The power acquisition module 6 and the UCS direct-reading sensor's ground-based display 2 are connected via a 485 serial communication network, using a daisy-chain wiring method to avoid data interference. Operating data is uploaded to the cloud server via the GPRS module 17, enabling remote... The system includes monitoring and adjustment functions; a power input terminal 23 at the front of the lower layer serves as the physical interface for external power supply to the control cabinet, employing an anti-loosening terminal design to ensure the reliability and safety of the power connection; and an output terminal 24 at the rear, with the power input and motor output arranged separately. A multi-functional human-machine interface 1 is used for starting, stopping, speed adjustment, and fault reset operations of the screw pump and reinjection pump. A temperature-controlled cooling fan is located at the top of the cabinet, automatically controlled by a temperature controller 20. The cabinet includes a surge protector 3 connected in parallel to the main power circuit to suppress instantaneous overvoltages in the power grid and protect against surge energy. Precision components such as back-end control transformer 14, switching power supply 15, DC holding controller 7, and secondary control power supply 12 serve as redundant power supplies to maintain control circuit power supply when the main power supply is abnormal, ensuring reliable transmission of emergency stop commands or status signals. Secondary control circuit fuse 13 and switching power supply 15 convert AC power into stable DC power to power DC equipment such as multi-functional human-machine interface 1 and power acquisition module 6. Intermediate relay 21 and maintenance socket 19 are used for circuit protection, auxiliary control, and debugging power supply. GPRS module 17 is controlled by GPRS power switch 18.

[0030] Specifically, an orderly power supply system is constructed by rationally arranging components such as power input terminal 23, main power circuit breaker 4, surge protector 3, and control transformer 14 to stably supply power to the secondary circuit; power filter 16, power acquisition module 6, multi-functional human-machine interface 1, vector frequency converter 10, and reinjection frequency converter 5 work together to achieve integrated control of screw pump and reinjection pump; UCS direct-reading sensor ground display 2, downhole pressure sensor, and 485 communication network including GPRS module 17 work together to upload operating data in real time, improving data integration capabilities; multi-functional human-machine interface 1 facilitates parameter setting and improves on-site operation convenience; maintenance socket 19 provides debugging power and simplifies equipment maintenance process; dustproof net group and temperature controller 20 control the top fan to ensure the working environment of components and reduce failure and maintenance costs; data is uploaded to the cloud server through the communication module to facilitate operation data management and real-time analysis, improving management efficiency.

[0031] Working principle: The control cabinet is connected to the power supply through the power input terminal 23. After the main power circuit breaker 4 and surge protector 3 control the on / off state and provide overvoltage protection, the secondary circuit is powered by the control transformer 14, switching power supply 15 and secondary control power supply 12. The power filter 16 filters out interference, the power acquisition module 6 monitors the power parameters in real time, and the user sets the parameters through the multi-functional human-machine interface 1. The vector frequency converter 10 and the reinjection frequency converter 5 drive the screw pump and the reinjection pump respectively. The main output contactor 8, the anti-reverse contactor 9 and the reinjection pump output contactor 11 realize the motor start-stop and protection. The data of the UCS direct reading sensor ground display 2 and the downhole pressure sensor are uploaded to the cloud server via the 485 communication network including the GPRS module 17. The temperature controller 20 controls the top fan for heat dissipation, and the dustproof net group isolates dust. The DC holding controller 7, the intermediate relay 21 and the external signal terminal 22 assist the control. The maintenance socket 19 provides debugging power, the output terminal 24 connects to the motor, and the secondary control circuit fuse 13 ensures circuit safety. The whole system realizes intelligent control, data integration and safety protection.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A control cabinet for a water reinjection integrated system, characterized in that: The control cabinet adopts a layered layout, including: The cabinet's front inner door is equipped with a multi-functional human-machine interface (1) and a UCS direct-reading sensor ground display (2); The front of the cabinet is equipped with a main power circuit breaker (4), a reinjection frequency converter (5), a power acquisition module (6), a vector frequency converter (10), a main output contactor (8), an anti-reverse contactor (9), and a reinjection pump output contactor (11). Inside the rear door of the cabinet are a control transformer (14), a power filter (16), a GPRS module (17), a temperature controller (20), and an external signal terminal (22).

2. The control cabinet of the integrated water reinjection system according to claim 1, characterized in that: The multi-functional human-machine interface (1) is connected to the reinjection frequency converter (5), vector frequency converter (10), power acquisition module (6) and UCS direct reading sensor ground display (2) via 485 serial communication network. The wiring adopts a "hand-in-hand" method to avoid data interference. The operating data is uploaded to the cloud server via GPRS module (17) to realize remote monitoring and adjustment.

3. The control cabinet of the integrated water reinjection system according to claim 1, characterized in that: The lower front of the cabinet is equipped with a power input terminal (23) and the rear is equipped with an output terminal (24), with the power input and motor output arranged separately at the front and rear.

4. The control cabinet of the integrated water reinjection system according to claim 1, characterized in that: The multi-functional human-machine interface (1) is used for starting, stopping, speed adjustment and fault reset operations of screw pumps and reinjection pumps.

5. The control cabinet of the integrated water reinjection system according to claim 1, characterized in that: The top of the cabinet is equipped with a temperature-controlled cooling fan, which is automatically controlled by a temperature controller (20).

6. The control cabinet of the integrated water reinjection system according to claim 1, characterized in that: The cabinet includes a surge protector (3), a DC holding controller (7), a secondary control power supply (12), a secondary control circuit fuse (13), a switching power supply (15), an intermediate relay (21), and a maintenance socket (19), which are used for circuit protection, auxiliary control, and debugging power supply.

7. The control cabinet of the integrated water reinjection system according to claim 1, characterized in that: The GPRS module (17) is controlled by the GPRS power switch (18).

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