Screw pressurizing water injection device of flange connection structure

Abstract

The utility model relates to the technical field of screw pressurizing water injection devices, and discloses a screw pressurizing water injection device of a flange connection structure, which comprises an upper end cover, a motor stator shell, a protective bin shell, a flexible connecting shaft shell, a flexible connector, a pump end connecting pipe, a screw pump, a protective cover, a base and a control cabinet, the upper end cover and the motor stator shell, the motor stator shell and the protection bin shell, the protection bin shell and the flexible connecting shaft shell, and the flexible connecting shaft shell and the pump end connecting pipe are connected through flanges and fastened through studs and nuts. According to the screw pressurizing water injection device, threaded connection of all connecting parts of the screw pressurizing water injection device is changed into flange connection, the problems that existing threaded connection is prone to being damaged due to high-pressure impact and difficult to disassemble and assemble are solved, meanwhile, fine threads do not need to be adopted in flange connection due to looseness prevention, the threads are not prone to being scratched and damaged due to non-concentricity during assembly, and the service life of the screw pressurizing water injection device is prolonged. And the device has the original advantages and is more suitable for oil field pressurization water injection scenes.

Description

Technical Field

[0001] This utility model relates to the technical field of screw-driven pressurized water injection devices, and in particular to a screw-driven pressurized water injection device with a flange connection structure. Background Technology

[0002] In oilfield development operations, pressurized water injection is a key means to maintain reservoir pressure and ensure stable crude oil production. Due to its advantages such as stable operation, energy efficiency, and low leakage risk, screw-type pressurized water injection devices have become commonly used equipment in oilfield water injection systems. They convert mechanical energy into liquid pressure energy through screw pumps to accurately replenish high-pressure water sources to the reservoir, which is of great significance for improving oilfield development efficiency and recovery rate, and promotes the continuous optimization and upgrading of water injection technology.

[0003] Existing screw-type booster water injection devices mostly use threaded connection structures for the motor housing and connecting parts. They rely on the thread engagement to transmit force and torque, and use the thread engagement to achieve assembly and fixation between components. The thread structure itself, in conjunction with sealing elements, prevents high-pressure liquid leakage and ensures the operation of the device.

[0004] However, existing technologies have significant drawbacks. Due to the high-pressure liquid and pressure fluctuations inside, the threaded connections are subjected to high stress, and long-term impact can easily cause thread damage and adhesion. During later maintenance and repair of the motor, it is difficult to disassemble the housing smoothly, often requiring the discarding of the low-value housing for lathe machining. This not only wastes resources and significantly increases maintenance costs but also seriously affects equipment operation and maintenance efficiency and cycle time, hindering the stable and economical operation of the unit in the oilfield. Therefore, a flange-connected screw-type pressurized water injection device is proposed to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a screw-type booster water injection device with a flange connection structure, aiming to improve the problems of high maintenance costs and difficult assembly in the existing screw-type booster water injection device, which is easily damaged by high pressure on the threaded connection, difficult to disassemble, and prone to rework due to damage to the fine thread during assembly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A screw-type booster water injection device with a flange connection structure includes an upper end cover, a motor stator housing, a protective chamber housing, a flexible connecting shaft housing, a flexible connector, a pump end connecting pipe, a screw pump, a protective cover, a base, and a control cabinet. The upper end cover is connected to the motor stator housing, the motor stator housing to the protective chamber housing, the protective chamber housing to the flexible connecting shaft housing, and the flexible connecting shaft housing to the pump end connecting pipe via flanges, secured with double-ended studs and nuts. Sealing rings are provided between the flanges. The flexible connector is connected to the screw pump to transmit motor torque. The motor and other components are mounted on the base, and the control cabinet is mounted on the base and covers the motor, forming an integrated electromechanical structure.

[0008] As a further description of the above technical solution:

[0009] The sealing ring is made of high-pressure resistant and wear-resistant rubber to ensure high-pressure sealing effect and service life.

[0010] As a further description of the above technical solution:

[0011] The double-ended stud is made of high-strength alloy steel, which has good tensile strength and fatigue resistance, ensuring the stability of the flange connection.

[0012] As a further description of the above technical solution:

[0013] The flexible connector is a metal corrugated flexible connector, which can effectively compensate for installation errors and absorb vibration, thereby improving the stability of torque transmission.

[0014] As a further description of the above technical solution:

[0015] The control cabinet is equipped with an intelligent control module that can monitor the motor's operating parameters in real time and realize intelligent speed regulation and fault early warning functions for the motor.

[0016] As a further description of the above technical solution:

[0017] The base is equipped with a shock-absorbing pad at the bottom, which can reduce the impact of vibrations generated during device operation on the installation foundation, and at the same time reduce the interference of external vibrations on the device.

[0018] This utility model has the following beneficial effects:

[0019] By replacing threaded connections with flange connections at each connection point of the screw-type booster water injection device, the problems of easy damage from high-pressure impact, difficulty in disassembly, and assembly difficulties of existing threaded connections are solved. Flange connections are secured with double-ended studs and nuts, and high-pressure sealing is achieved with sealing rings, which facilitates later maintenance and avoids the cost waste caused by thread damage that prevents disassembly. The maintenance cost of a single motor can be reduced by more than 10,000 yuan. At the same time, flange connections do not require fine threads for anti-loosening, and are less likely to be scratched or damaged by misalignment during assembly, reducing rework. Assembly time can be reduced by more than 20 hours per unit, reducing the consumption of manpower and materials. The reasonable flange size calculated by strength takes into account both compact structure and stable operation, so that the device retains the original advantages and is more suitable for oilfield booster water injection scenarios. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the planar structure of a screw-driven pressurized water injection device with a flange connection structure proposed in this utility model.

[0021] Legend:

[0022] 1. Top cover; 2. Motor stator housing; 3. Protective chamber housing; 4. Flexible connecting shaft housing; 5. Flexible connector; 6. Pump end connecting pipe; 7. Screw pump; 8. Protective cover; 9. Base; 10. Control cabinet. Detailed Implementation

[0023] 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.

[0024] Reference Figure 1This utility model provides an embodiment of a screw-type booster water injection device with a flange connection structure, comprising an upper end cover 1, a motor stator housing 2, a protective chamber housing 3, a flexible connecting shaft housing 4, a flexible connector 5, a pump end connecting pipe 6, a screw pump 7, a protective cover 8, a base 9, and a control cabinet 10. The upper end cover 1 seals the upper end of the motor stator housing 2 to prevent dust and moisture from entering. The motor stator housing 2 houses and protects the motor stator and provides an electromagnetic field to drive the rotor rotation. The protective chamber housing 3 protects internal components from external environmental corrosion and provides structural support. The flexible connecting shaft housing 4 protects the flexible connector 5 from external impact and wear. The flexible connector 5 connects the motor and the screw pump 7, transmitting torque and compensating for shaft wear. The pump end connecting pipe 6 is used to connect the screw pump 7 and the external piping system to achieve fluid transmission. The screw pump 7 is used to convert mechanical energy into fluid pressure energy to achieve the function of pressurizing and injecting water. The protective cover 8 is used to protect the screw pump 7 and other external components to prevent mechanical damage and environmental pollution. The base 9 is used to support and fix the entire device to ensure operational stability. The control cabinet 10 is used to centrally control the motor operation and provide protection and monitoring functions. The upper end cover 1 is connected to the motor stator housing 2, the motor stator housing 2 is connected to the protective chamber housing 3, the protective chamber housing 3 is connected to the flexible connecting shaft housing 4, and the flexible connecting shaft housing 4 is connected to the pump end connecting pipe 6 by flanges and fastened with double-ended studs and nuts. A sealing ring is provided between the flanges to provide high strength and durability. The reliable connection method is suitable for high-pressure conditions. Double-ended studs and nuts ensure a tight connection and prevent loosening. A sealing ring prevents fluid leakage and ensures sealing performance. Flexible connector 5 connects to the screw pump 7 to transmit motor torque. Flexible connector 5 can absorb vibration and compensate for installation errors, improving transmission efficiency. The motor and other components are mounted on base 9, which provides a stable mounting platform and reduces vibration transmission. Control cabinet 10 is mounted on base 9 and covers the motor, forming an integrated electromechanical structure. This integrated structure saves space and facilitates maintenance and management. The sealing ring is made of high-pressure resistant and wear-resistant rubber to ensure high-pressure sealing effect and service life. The rubber sealing ring has good elasticity and wear resistance, adapting to high pressure and frequent vibration. In operation, the double-ended studs are made of high-strength alloy steel, possessing excellent tensile strength and fatigue resistance, ensuring the stability of the flange connection. These high-strength alloy steel double-ended studs can withstand high tensile stress and cyclic loads, preventing breakage and loosening. The flexible connector 5 is a metal corrugated flexible connector, which effectively compensates for installation errors and absorbs vibration, improving the stability of torque transmission. The metal corrugated flexible connector 5 has high rigidity and flexibility, adapting to complex working conditions. The control cabinet 10 is equipped with an intelligent control module that can monitor the motor's operating parameters in real time, realizing intelligent speed regulation and fault warning functions. The intelligent control module improves operating efficiency and reduces downtime due to faults. The base 9 has a shock-absorbing buffer pad at the bottom, which can reduce the impact of vibration generated during device operation on the installation foundation.Simultaneously, to reduce interference from external vibrations, the shock-absorbing pads are made of highly elastic material, effectively absorbing and isolating vibrations, thus extending the lifespan of the device.

[0025] Working Principle: Before the device starts, all components, such as the upper cover 1 and the motor stator housing 2, are connected by flanges and fitted with studs, nuts, and sealing rings to form a compact whole, which is installed on the base 9. The control cabinet 10 covers the motor, forming an electromechanical integrated structure. During operation, the control cabinet 10 outputs an electrical signal to drive the motor. The motor torque is transmitted to the screw pump 7 through the flexible connector 5. High-pressure liquid flows inside the device. The flange connection between the upper cover 1 and the motor stator housing 2 is secured by sealing rings and studs to achieve high-pressure sealing, ensuring no liquid leakage. Compared with traditional threaded connections, flange connections avoid the problem of thread damage and adhesion caused by high-pressure liquid impact and pressure fluctuations. During later maintenance, each housing component can be easily disassembled. In the assembly process, there is no need to deal with the assembly problem of fine threads, reducing the probability of thread scratches and rework, improving assembly efficiency, and allowing the screw pressurized water injection device to operate stably and efficiently, meeting the water injection needs of the oilfield, while saving costs and time.

[0026] 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 screw-driven pressurized water injection device with a flange connection structure, characterized in that: The system includes an upper cover (1), a motor stator housing (2), a protective chamber housing (3), a flexible connecting shaft housing (4), a flexible connector (5), a pump end connecting pipe (6), a screw pump (7), a protective cover (8), a base (9), and a control cabinet (10). The upper cover (1) is connected to the motor stator housing (2), the motor stator housing (2) is connected to the protective chamber housing (3), the protective chamber housing (3) is connected to the flexible connecting shaft housing (4), and the flexible connecting shaft housing (4) is connected to the pump end connecting pipe (6) by flanges and fastened by double-ended studs and nuts. A sealing ring is provided between the flanges. The flexible connector (5) is connected to the screw pump (7) to transmit motor torque. The motor and other components are mounted on the base (9), and the control cabinet (10) is mounted on the base (9) and covers the motor, forming an electromechanical integrated structure with the motor.

2. The screw-type pressurized water injection device with a flange connection structure according to claim 1, characterized in that: The sealing ring is made of high-pressure resistant and wear-resistant rubber to ensure high-pressure sealing effect and service life.

3. The screw-type pressurized water injection device with a flange connection structure according to claim 1, characterized in that: The double-ended stud is made of high-strength alloy steel, which has good tensile strength and fatigue resistance, ensuring the stability of the flange connection.

4. The screw-type booster water injection device with a flange connection structure according to claim 1, characterized in that: The flexible connector (5) is a metal corrugated flexible connector (5), which can effectively compensate for installation errors and absorb vibration, thereby improving the stability of torque transmission.

5. The screw-type pressurized water injection device with a flange connection structure according to claim 1, characterized in that: The control cabinet (10) is equipped with an intelligent control module, which can monitor the motor's operating parameters in real time and realize the motor's intelligent speed regulation and fault warning functions.

6. The screw-type booster water injection device with a flange connection structure according to claim 1, characterized in that: The base (9) is provided with a shock-absorbing buffer pad at the bottom, which can reduce the impact of vibration generated during the operation of the device on the installation foundation, and at the same time reduce the interference of external vibration on the device.

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