Anti-blocking oil-submerged pump impeller guide wheel

Abstract

The utility model relates to the technical field of oil-submerged pumps, in particular to an anti-blocking oil-submerged pump impeller guide wheel which comprises an impeller cover plate, a flow guide part and a plurality of blades, the flow guide part and the blades are arranged at the upper end of the impeller cover plate, the blades surround the flow guide part, a flow guide channel allowing oil to pass through is arranged between every two adjacent blades, and a cleaning block is arranged at the upper end of the flow guide part. A rotating shaft is arranged at the lower end of the impeller cover plate, a liquid injection cavity is formed in the rotating shaft and communicates with a fluid discharge port formed in the outer side of the cleaning block, and a one-way valve used for preventing external oil from entering the cleaning block is arranged in the fluid discharge port. When the blades rotate, oil can be injected into the cleaning block through the liquid injection cavity, and when the impeller cover plate drives the blades, the flow guide part and the cleaning block to rotate, the oil can be sprayed out from the fluid outlet at a high speed, sundries in the flow guide channel are washed away in time when the flow guide channel is blocked, smoothness of the oil-submerged pump is guaranteed, and the impeller guide wheel is convenient to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible oil pumps, in particular to an anti-blocking submersible oil pump impeller guide wheel. Background Technique

[0002] An electric submersible centrifugal pump (hereinafter referred to as a submersible electric pump) is a multi-stage centrifugal pump working underground. The centrifugal pump and the submersible motor are lowered into the well by a tubing string. The motor drives the multi-stage centrifugal pump to rotate to generate centrifugal force, lifting the crude oil in the well to the ground. It is a rodless pump oil production equipment widely used in each oilfield.

[0003] The centrifugal pump body of the submersible oil pump is composed of multiple stages, and each stage includes a fixed guide wheel and a rotatable impeller. There are two types of impellers: fixed type and floating type. The fixed impeller is fixed on the pump shaft and cannot axially move or lean against the thrust pad of the guide wheel. All the thrust generated by the impeller and the pressure difference is borne by the thrust bearing installed in the protector. During the circulation of the oil fluid, if the oil fluid contains impurities insoluble in oil such as dust, iron filings, and fibers, these impurities may enter the impeller guide wheel of the oil pump along with the oil fluid and deposit in the impeller guide wheel, resulting in blockage. The blockage will cause the flow rate of the submersible oil pump to decrease and the conveying efficiency of the submersible oil pump to be reduced. Since the impeller guide wheel is mostly enclosed and fixed inside the centrifugal pump body, it is difficult to clean and dredge. Content of the Utility Model

[0004] In view of the above problems, the utility model provides an anti-blocking submersible oil pump impeller guide wheel to solve the disadvantages that when the existing submersible oil pump impeller guide wheel works, impurities contained in the oil fluid will deposit in the impeller guide wheel, causing blockage of the impeller guide wheel, thereby reducing the conveying efficiency of the submersible oil pump, and it is difficult to clean and dredge because the impeller guide wheel is mostly enclosed and fixed inside the centrifugal pump body.

[0005] To achieve the purpose of the utility model, the utility model is realized through the following technical solutions: an anti-blocking submersible oil pump impeller guide wheel, including an impeller cover plate, a guiding member and a plurality of blades arranged at the upper end of the impeller cover plate. The guiding member and the blades are both fixedly connected to the impeller cover plate. The axis of the guiding member coincides with the axis of the impeller cover plate. Each blade surrounds the guiding member, and a guiding channel allowing the oil fluid to pass through is provided between two adjacent blades;

[0006] A cleaning block is arranged at the upper end of the guiding member, and the cleaning block is fixedly connected to the guiding member. A rotating shaft is arranged at the lower end of the impeller cover plate, and the rotating shaft is fixedly connected to the impeller cover plate;

[0007] A liquid injection cavity is opened in the rotating shaft, and the liquid injection cavity is communicated with a fluid discharge port opened outside the cleaning block. A one-way valve for blocking the external oil fluid from entering the cleaning block is arranged in the fluid discharge port.

[0008] A further improvement lies in that: a fluid inlet is provided at the lower end of the cleaning block, the fluid inlet is communicated with the liquid injection cavity through a flow guiding member, the fluid inlet is communicated with a pressure cavity provided in the cleaning block, the fluid discharge port is communicated with the pressure cavity through a flow passage provided in the cleaning block, and the diameter of the flow passage is smaller than the diameter of the fluid discharge port.

[0009] A further improvement lies in that: the flow guiding member is a cone, and a flow guiding cavity is provided inside the flow guiding member for allowing the liquid agent in the liquid injection cavity to pass through and flow into the fluid inlet.

[0010] A further improvement lies in that: the one-way valve includes a spherical plug, one side of the spherical plug facing the cleaning block is clamped into the fluid discharge port, an arc-shaped baffle is provided on the side of the spherical plug away from the cleaning block, the diameter of the arc-shaped baffle is larger than the diameter of the fluid discharge port, a spring is provided in the flow passage, one end of the spring is fixedly connected to the spherical plug, and the other end of the spring is fixedly connected to the inner side wall of the flow passage.

[0011] A further improvement lies in that: a rubber ring is fixedly connected to the side of the arc-shaped baffle facing the cleaning block, the rubber ring surrounds the spherical plug, and an annular groove matched with the rubber ring is provided on the outer side of the cleaning block.

[0012] A further improvement lies in that: each flow guiding channel corresponds to each fluid discharge port respectively.

[0013] A further improvement lies in that: an impeller cover ring is provided above the impeller cover plate, the blades are arranged between the impeller cover plate and the impeller cover ring, the impeller cover ring is fixedly connected to the side of the blade away from the impeller cover plate, and the axis of the impeller cover ring coincides with the axis of the impeller cover plate.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] When the blades rotate, the oil liquid can be introduced into the cleaning block through the liquid injection cavity. When the impeller cover plate drives the blades, the flow guiding member and the cleaning block to rotate, the oil liquid will be ejected from the fluid discharge port at a high speed, and when the flow guiding channel is blocked, the sundries in the flow guiding channel can be washed away in time, ensuring the smoothness of the submersible oil pump and facilitating the cleaning of the impeller guide wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a structural diagram of the impeller cover ring in the present utility model.

[0018] Figure 2 It is a structural diagram of the impeller cover plate in the present utility model.

[0019] Figure 3 It is the cross-sectional structure diagram of the rotating shaft in the present utility model.

[0020] Figure 4 It is the cross-sectional structure diagram of the cleaning block in the present utility model.

[0021] Wherein: 1. Impeller cover plate; 2. Impeller cover ring; 3. Blades; 4. Flow guide member; 5. Cleaning block; 6. Flow guide channel; 7. Rotating shaft; 8. Liquid injection cavity; 9. Fluid discharge port; 10. Ball-shaped plug; 11. Arc-shaped baffle; 12. Rubber ring; 13. Fluid inlet; 14. Pressure cavity; 15. Flow-through cavity channel; 16. Spring. Specific embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0023] According to Figure 1 , 2 , as shown in Figures 3 and 4, a clogging-proof submersible oil pump impeller guide wheel is proposed in this embodiment, which includes an impeller cover plate 1, a flow guide member 4 provided at the upper end of the impeller cover plate 1, and a plurality of blades 3. The flow guide member 4 and the blades 3 are both fixedly connected to the impeller cover plate 1. The axis of the flow guide member 4 coincides with the axis of the impeller cover plate 1. Each blade 3 surrounds the flow guide member 4, and a flow guide channel 6 allowing oil to pass through is provided between two adjacent blades 3;

[0024] A cleaning block 5 is provided at the upper end of the flow guide member 4. The cleaning block 5 is fixedly connected to the flow guide member 4. A rotating shaft 7 is provided at the lower end of the impeller cover plate 1. The rotating shaft 7 is fixedly connected to the impeller cover plate 1;

[0025] The rotating shaft 7 is connected to a power member, and the power member drives the impeller cover plate 1 to rotate. The blades 3 on the impeller cover plate 1 guide the oil during rotation. Under the impact of high-speed rotation and liquid flow, the impeller guide wheel needs to have good wear resistance. Therefore, the impeller cover plate 1, the blades 3, etc. are all made of high-nickel cast iron material, and high-nickel cast iron has good wear resistance.

[0026] A liquid injection cavity 8 is formed in the rotating shaft 7. The liquid injection cavity 8 communicates with a fluid discharge port 9 opened on the outer side of the cleaning block 5. A one-way valve for blocking external oil from entering the cleaning block 5 is provided in the fluid discharge port 9.

[0027] When the blade 3 rotates, the oil can pass through the liquid injection cavity 8 into the cleaning block 5. When the impeller cover 1 drives the blade 3, the flow guide 4 and the cleaning block 5 to rotate, the oil will be ejected from the fluid discharge port 9 at high speed. When the diversion channel 6 is blocked, the sundries in the diversion channel 6 can be washed away in time, ensuring the smooth operation of the submersible oil pump and facilitating the cleaning of the impeller guide wheel.

[0028] It is further worth noting that a fluid inlet 13 is provided at the lower end of the cleaning block 5. The fluid inlet 13 is connected to the liquid injection cavity 8 through the flow guide 4, and the fluid inlet 13 is connected to the pressure cavity 14 provided in the cleaning block 5. The fluid discharge port 9 is connected to the pressure cavity 14 through the flow passage 15 provided in the cleaning block 5, and the diameter of the flow passage 15 is smaller than the diameter of the fluid discharge port 9. The liquid agent in the liquid injection cavity 8 is injected into the pressure cavity 14 through the fluid inlet 13 at the lower port of the cleaning block 5. When the rotating shaft 7 rotates, it does not affect the continuous infusion of the liquid agent.

[0029] Regarding the flow guide 4:

[0030] The flow guide 4 is a cone, and a diversion channel is provided inside the flow guide 4 to allow the liquid agent in the liquid injection cavity 8 to pass through and flow into the fluid inlet 13. This design makes the fluid passing through the blade 3 have less resistance when passing through the flow guide 4, optimizes the structural design, and enhances the mechanical performance of the impeller cover 1.

[0031] Regarding the one-way valve:

[0032] The one-way valve includes a spherical plug 10. One side of the spherical plug 10 facing the cleaning block 5 is clamped into the fluid discharge port 9. An arc-shaped baffle 11 is provided on the side of the spherical plug 10 away from the cleaning block 5, and the diameter of the arc-shaped baffle 11 is larger than the diameter of the fluid discharge port 9. A spring 16 is provided in the flow passage 15. One end of the spring 16 is fixedly connected to the spherical plug 10, and the other end of the spring 16 is fixedly connected to the inner side wall of the flow passage 15.

[0033] As the hydraulic pressure in the pressure cavity 14 continuously increases, the liquid agent will enter the fluid discharge port 9 through the flow passage 15. While pushing open the fluid discharge port 9, it will rush into the diversion channel 6 and wash away the blockage in the diversion channel 6. When the oil supply to the liquid injection cavity 8 stops, the hydraulic pressure in the pressure cavity 14 decreases. Under the pull of the spring 16, the spherical plug 10 will re-clamp into the fluid discharge port 9 to seal the fluid discharge port 9. At this time, the oil outside the cleaning block 5 will not enter the cleaning block 5 through the fluid discharge port 9.

[0034] To enhance the sealing effect of the arc-shaped baffle 11 on the fluid discharge port 9, in the preferred embodiment, a rubber ring 12 is fixedly connected to the side of the arc-shaped baffle 11 facing the cleaning block 5. The rubber ring 12 surrounds the spherical plug 10, and an annular groove cooperating with the rubber ring 12 is formed on the outer side of the cleaning block 5. When the spherical plug 10 is inserted into the fluid discharge port 9, the arc-shaped baffle 11 fixed to the spherical plug 10 will abut against the outer side wall of the cleaning block 5. The rubber ring 12 on the inner side of the arc-shaped baffle 11 will then be stuck into the annular groove formed on the outer side of the cleaning block 5. The rubber ring 12 blocks outside the notch of the fluid discharge port 9, further preventing the oil from seeping into the fluid discharge port 9 through the gap between the arc-shaped baffle 11 and the cleaning block 5 without affecting the opening and closing of the spherical plug 10.

[0035] In the preferred embodiment, each diversion channel 6 corresponds to each fluid discharge port 9 respectively. The fluid discharge port 9 is arranged facing the direction of the diversion channel 6. A plurality of fluid discharge ports 9 are formed on the outer side of the cleaning block 5. The number of the fluid discharge ports 9 is determined according to the number of the diversion channels 6. When the fluid discharge port 9 is opened, the jet flow ejected from the fluid discharge port 9 will enter the corresponding diversion channel 6, ensuring that the fluid can fully wash the blockage in the diversion channel 6 and improving the dredging efficiency.

[0036] In the preferred embodiment, an impeller cover ring 2 is provided above the impeller cover plate 1. The blades 3 are arranged between the impeller cover plate 1 and the impeller cover ring 2. The impeller cover ring 2 is fixedly connected to the side of the blade 3 far from the impeller cover plate 1, and the axis of the impeller cover ring 2 coincides with the axis of the impeller cover plate 1. The blades 3 are fixed between the impeller cover plate 1 and the impeller cover ring 2. By means of the impeller cover ring 2, the sealing property of the impeller guide wheel and the structural strength of the blades 3 are increased, which helps to improve the flow velocity and kinetic energy of the liquid, thus significantly enhancing the oil delivery efficiency.

[0037] The working principle of the present application:

[0038] The rotating shaft 7 is connected with a power component, and the power component drives the impeller cover plate 1 to rotate. The blades 3 on the impeller cover plate 1 guide the oil during rotation. The liquid agent in the liquid injection cavity 8 is injected into the pressure cavity 14 through the fluid inlet 13 at the lower port of the cleaning block 5. When the rotating shaft 7 rotates, it does not affect the continuous infusion of the liquid agent. As the hydraulic pressure in the pressure cavity 14 continuously increases, the liquid agent will enter the fluid discharge port 9 through the flow-through cavity 15, pushing open the fluid discharge port 9 and flushing into the diversion channel 6 at the same time, washing away the blockage in the diversion channel 6. When the oil delivery to the liquid injection cavity 8 is stopped, the hydraulic pressure in the pressure cavity 14 decreases. Under the pulling of the spring 16, the spherical plug 10 will be reinserted into the fluid discharge port 9 to seal the fluid discharge port 9. At this time, the oil outside the cleaning block 5 will not enter the cleaning block 5 through the fluid discharge port 9.

[0039] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0040] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A clogging-proof submersible oil pump impeller guide wheel, comprising an impeller cover plate (1), a flow guiding member (4) and a plurality of blades (3) arranged at the upper end of the impeller cover plate (1), wherein the flow guiding member (4) and the blades (3) are both fixedly connected to the impeller cover plate (1), and is characterized in that: The axis of the flow guide member (4) coincides with the axis of the impeller cover plate (1), and each of the blades (3) surrounds the flow guide member (4). A flow guide channel (6) allowing the oil to pass through is provided between two adjacent blades (3). A cleaning block (5) is provided at the upper end of the flow guide member (4), and the cleaning block (5) is fixedly connected to the flow guide member (4). A rotating shaft (7) is provided at the lower end of the impeller cover plate (1), and the rotating shaft (7) is fixedly connected to the impeller cover plate (1). A liquid injection cavity (8) is formed in the rotating shaft (7), and the liquid injection cavity (8) communicates with a fluid discharge port (9) provided on the outer side of the cleaning block (5). A one-way valve for blocking the external oil from entering the cleaning block (5) is provided in the fluid discharge port (9).

2. The anti-clogging submersible oil pump impeller guide wheel according to claim 1, characterized in that: A fluid inlet (13) is formed at the lower end of the cleaning block (5). The fluid inlet (13) communicates with the liquid injection cavity (8) through the flow guide member (4), and the fluid inlet (13) communicates with a pressure cavity (14) formed in the cleaning block (5). The fluid discharge port (9) communicates with the pressure cavity (14) through a flow passage (15) formed in the cleaning block (5). The diameter of the flow passage (15) is smaller than the diameter of the fluid discharge port (9).

3. The anti-clogging submersible oil pump impeller guide wheel according to claim 2, characterized in that: The flow guide member (4) is a cone, and a flow guide channel is formed inside the flow guide member (4) to allow the liquid agent in the liquid injection cavity (8) to pass through and flow into the fluid inlet (13).

4. The anti-clogging submersible oil pump impeller guide wheel according to claim 2, characterized in that: The one-way valve includes a spherical plug (10). One side of the spherical plug (10) facing the cleaning block (5) is clamped into the fluid discharge port (9). An arc-shaped baffle (11) is provided on the side of the spherical plug (10) away from the cleaning block (5). The diameter of the arc-shaped baffle (11) is larger than the diameter of the fluid discharge port (9). A spring (16) is provided in the flow passage (15). One end of the spring (16) is fixedly connected to the spherical plug (10), and the other end of the spring (16) is fixedly connected to the inner side wall of the flow passage (15).

5. The anti-clogging submersible oil pump impeller guide wheel according to claim 4, characterized in that: A rubber ring (12) is fixedly connected to the side of the arc-shaped baffle (11) facing the cleaning block (5). The rubber ring (12) surrounds the spherical plug (10). An annular groove matching with the rubber ring (12) is formed on the outer side of the cleaning block (5).

6. The anti-clogging submersible oil pump impeller guide wheel according to claim 1, characterized in that: Each of the flow guide channels (6) corresponds to each of the fluid discharge ports (9).

7. The anti-clogging submersible oil pump impeller guide wheel described in claim 1, characterized in that: An impeller cover ring (2) is provided above the impeller cover plate (1). The blades (3) are arranged between the impeller cover plate (1) and the impeller cover ring (2). The impeller cover ring (2) is fixedly connected to the side of the blade (3) away from the impeller cover plate (1). The axis of the impeller cover ring (2) coincides with the axis of the impeller cover plate (1).

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