Oil-submerged pump and motor connecting seat for oil-submerged pump

Abstract

The utility model relates to an oil-submerged pump and a motor connecting seat for the oil-submerged pump. The motor connecting base for the oil-submerged pump comprises a base body, a circuit channel and a plurality of oil way channels, and the circuit channel and the oil way channels are arranged in the base body. Wherein at the first end of the seat body, the plurality of oil way channels are arranged around the periphery of the circuit channel; and at the second end of the seat body, the plurality of oil way channels are converged at one position and are arranged in parallel and at intervals with the circuit channel. The motor connecting base can be suitable for a brand new pump pipe arrangement mode, the overflowing area of an oil way pipe can be effectively increased, the on-way resistance of oil flowing can be effectively reduced, the operation power of the oil-submerged pump can be reduced, the oil-submerged pump can output more oil under the same power consumption, and the circuit pipe can be conveniently maintained and checked.

Description

Technical Field

[0001] This utility model relates to the field of refueling equipment, and in particular to a submersible pump and a motor connector for the submersible pump. Background Technology

[0002] In the fuel delivery system of a gas station, the submersible pump, as the core power unit, is typically mounted via a flange on the top riser structure of the storage tank. Generally, the storage tank is buried underground at the gas station, and a manhole is located at the top riser structure. Routine operations requiring manual intervention, such as the installation and maintenance of the submersible pump, must be performed by construction personnel inside the manhole. The submersible pump consists of a pump head, pump tubing, and a submersible motor. When installed on the storage tank, the pump head protrudes into the manhole, the pump tubing extends into the storage tank, and the submersible motor is submerged in fuel. When refueling is needed, the refueling nozzle is raised, a control relay receives a signal, and the corresponding submersible pump is activated, thus delivering fuel from the storage tank to the refueling dispenser.

[0003] However, current submersible pumps all use a coaxial arrangement of the electrical conduit within the oil line conduit. This results in the electrical conduit occupying the flow passage of the oil line conduit, effectively creating a flow restrictor in the submersible pump. The resulting resistance to oil flow is a waste of energy and severely reduces the pump's oil supply capacity. Furthermore, having the electrical conduit inside the oil line conduit makes pump assembly difficult, and increases maintenance difficulty and cost when faults such as poor airtightness of the electrical conduit, poor cable insulation, or cable jamming are discovered later. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model proposes a motor connector for a submersible pump, including a base body, and an electrical circuit channel and multiple oil circuit channels disposed within the base body; wherein, at the first end of the base body, the multiple oil circuit channels are arranged around the electrical circuit channel; at the second end of the base body, the multiple oil circuit channels converge at one point and are arranged parallel to and spaced apart from the electrical circuit channel.

[0005] As described above, the motor connector for a submersible pump has a peripheral dimension that gradually tapers from the first end to the second end.

[0006] As described above, the motor connector for a submersible pump has a first end including an outer edge that extends outward along the plane of the first end perpendicular to the outer surface of the connector, and the outer edge includes a connecting portion.

[0007] As described above, the motor connector for a submersible pump includes one or more connecting holes arranged at equal intervals along the outer edge.

[0008] As described above, the motor connector for a submersible pump includes one or more reinforcing ribs disposed on the outer surface of the connector from the first end and the second end, with the circuit channel extending from one of the reinforcing ribs at the second end of the connector.

[0009] According to another aspect of this application, a submersible pump is provided, comprising: a pump head, a pump pipe, and a submersible motor; and a motor connector as described above; the submersible motor is disposed in an oil storage tank and is used to draw oil from the oil storage tank; the pump pipe is connected between the pump head and the submersible motor, and includes an oil passage pipe and an electrical passage pipe, the oil passage pipe being used to allow oil to pass through and exit the oil storage tank, and the electrical passage pipe being used to allow electrical wires to pass through and supply power to the submersible motor; the motor connector is disposed between the pump pipe and the submersible motor for connecting the pump pipe and the submersible motor; the pump head is disposed above the opening of the oil storage tank and is used to allow oil and electrical wires to pass through; wherein, the electrical passage pipe is disposed outside the oil passage pipe and is arranged parallel to the oil passage pipe.

[0010] As described above, in the submersible pump, both the oil line pipe and the electrical line pipe are retractable pipes used to adjust the position of the submersible motor in the oil storage tank.

[0011] As described above, the submersible pump includes a first section of oil pipe and a second section of oil pipe, one end of the first section of oil pipe is disposed in the second section of oil pipe and can extend and retract axially along the second section of oil pipe; the circuit pipe includes a first section of circuit pipe and a second section of circuit pipe, one end of the first section of circuit pipe is disposed in the second section of circuit pipe and can extend and retract axially along the second section of circuit pipe.

[0012] The submersible pump described above further includes: an adjusting device disposed on the oil line pipe and / or the circuit pipe, and used to lock the length of the oil line pipe and / or the circuit pipe.

[0013] As described above, in the submersible pump, the second section of the oil pipe and the second section of the electrical pipe are connected to the second end of the motor connector as described above.

[0014] The motor connector of this application is applicable to a brand-new pump pipe setting method, which can effectively increase the flow area of ​​the oil pipe, reduce the friction resistance of oil flow, help reduce the operating power of the submersible pump, and enable the submersible pump to output more oil under the same power consumption. It also facilitates the maintenance and inspection of the circuit pipe. Attached Figure Description

[0015] The preferred embodiments of this utility model will now be described in further detail with reference to the accompanying drawings, wherein:

[0016] Figure 1This is a schematic diagram of a submersible pump structure according to an embodiment of this application;

[0017] Figure 2 An exploded view of a submersible pump according to an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of a pump tube assembly structure according to an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of a motor connector according to an embodiment of this application;

[0020] Figure 5A and Figure 5B This is a schematic diagram of the two end face structures of a motor connector according to an embodiment of this application; and

[0021] Figure 6A and Figure 6B This is a cross-sectional view of a motor connector according to an embodiment of this application. Detailed Implementation

[0022] The principles and spirit of this application will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are provided to make the principles and spirit of this application clearer and more thorough, enabling those skilled in the art to better understand and implement the principles and spirit of this application. The exemplary embodiments provided herein are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments described herein without inventive effort are within the scope of protection of this application.

[0023] In the following detailed description, reference can be made to the accompanying drawings, which form part of this application and illustrate specific embodiments of the application. In the drawings, similar reference numerals describe substantially similar components in different figures. Specific embodiments of the application are described in sufficient detail below to enable those skilled in the art to implement the technical solutions of this application. It should be understood that other embodiments may be utilized or structural, logical, or electrical changes may be made to the embodiments of this application. Furthermore, similar terms including "first," "second," and "third" in this application are used only to distinguish one entity (or operation) from another, and are not intended to require or imply any order or association between these entities (or operations).

[0024] In current pump pipe structures, the coaxial arrangement of electrical conduits and oil lines results in the electrical conduits occupying the flow passage of the oil line. Taking the largest standard oil line pipe as an example, its inner diameter is 2 inches; the outer diameter of the electrical conduit installed inside it is 0.85 inches; approximately 18% of the flow area within this pipe section is occupied by the conduit. Furthermore, for telescopic pump pipes that require variable lengths, the situation is even more severe. Due to limitations such as the orifice diameter of the oil tank riser and the connection devices of the telescopic pump pipe, the maximum inner diameter of the telescopic oil line pipe can be 1.6 inches, while the outer diameter of the sealing connection joint required for the telescopic electrical conduit can reach 1 inch. This results in 39% of the flow area inside the pump pipe being occupied, thereby increasing the flow resistance within the submersible pump and increasing energy loss.

[0025] This application proposes a novel pump tube assembly. By arranging the electrical conduit and oil conduit parallel to each other, there are no parts within the oil conduit that encroach on the flow area. This results in low frictional resistance for the oil flow, which helps reduce the operating power of the submersible pump. With the same power consumption, the submersible pump can output more oil. Furthermore, after assembly, the electrical conduit can be easily accessed for inspection, facilitating direct disassembly for troubleshooting. Inspection and maintenance are convenient and flexible. Correspondingly, this application also designs a novel motor connector that can accommodate the new pump tube and can also be used with existing submersible motors.

[0026] The technical solutions of this application are further illustrated below through specific embodiments. Those skilled in the art should understand that, based on the teachings of the following embodiments, other alternative solutions capable of achieving the same or similar functions are possible. These alternative solutions are also within the protection scope of this application.

[0027] Figure 1 This is a schematic diagram of a submersible pump structure according to an embodiment of this application. Figure 2 This is an exploded view of a submersible pump according to an embodiment of this application.

[0028] As shown in the figure, the submersible pump 100 includes a submersible motor 110, a pump pipe assembly 120, and a pump head 130. The submersible motor 110 can be installed in the oil storage tank, and the pump head 130 is installed on a riser structure at the top opening of the oil storage tank. The pump pipe assembly 120 connects the submersible motor 110 and the pump head 130. When refueling is required, after the submersible motor is powered on, it performs work on the oil, thereby pressurizing the oil and delivering it through the pump pipe and pump head into the refueling pipeline. The pump head 130 receives power and supplies it to the submersible motor through the pump pipe assembly, while simultaneously delivering the pressurized oil output by the submersible motor to the refueling machine. One end of the pump pipe assembly is connected to the pump head, and the other end is connected to the submersible motor, allowing the power supplied to the pump head to be connected to the submersible motor, and the pressurized oil output by the submersible motor to be delivered to the pump head.

[0029] The detailed structure of each part of the submersible pump will be described in detail below. As those skilled in the art will understand, this application does not improve the submersible motor, which can be any submersible motor of any structure in the art, and will not be described further here.

[0030] Figure 3 This is a schematic diagram of a pump tube assembly structure according to an embodiment of this application.

[0031] As shown in the figure, the pump pipe assembly 300 includes a pump pipe and a motor connector 330. The motor connector 330 is connected to one end of the pump pipe and can connect the pump pipe to the submersible motor, providing power to the submersible motor and outputting the oil delivered by the submersible motor.

[0032] In some embodiments, the pump pipe may include an oil passage pipe 310 and an electrical passage pipe 320. The electrical passage pipe 320 is disposed outside the oil passage pipe 310 and arranged parallel to it, thus ensuring that there are no parts within the oil passage pipe that encroach on the flow area, resulting in low frictional resistance to oil flow. This helps reduce the operating power of the submersible pump, allowing it to deliver more oil to the fuel dispenser with the same power consumption. For example, using a 2-inch pump pipe, compared to existing technologies, the flow area of ​​the oil passage pipe in this application can be increased by 18% to 39%. Furthermore, the electrical passage pipe's external location facilitates inspection. When problems are found with the electrical passage pipe or its cables, the electrical passage pipe can be easily disassembled to troubleshoot, making inspection and subsequent maintenance convenient and flexible.

[0033] In some embodiments, the oil pipe 310 and the electrical pipe 320 are straight pipes, which may be made of seamless steel pipe or aluminum profile pipe, and the material may be Q235 or 6061 grade, etc. In some embodiments, both ends of the oil pipe 310 and the electrical pipe 320 are provided with connecting threads, which can be used to connect to the motor connector and the pump head. In some embodiments, the size of the oil pipe 310 may be 2 inches or other smaller sizes; the size of the electrical pipe 320 may not exceed 0.85 inches.

[0034] In some embodiments, the oil pipe 310 and the electrical pipe 320 can also be adjustable pump pipes, whose lengths can be adjusted to allow the submersible pump to be used in oil storage tanks of different sizes, increasing the applicability of the submersible pump. In some embodiments, the oil pipe 310 may include a first section of oil pipe 311 and a second section of oil pipe 312. One end of the first section of oil pipe 311 extends into the second section of oil pipe 312 from one end of the second section of oil pipe 312, and can extend and retract along the axial direction of the second section of oil pipe 312, thereby adjusting the length of the oil pipe; the electrical pipe 320 may include a first section of electrical pipe 321 and a second section of electrical pipe 322, one end of the first section of electrical pipe 321 extends into the second section of electrical pipe 322 from one end of the second section of electrical pipe 322, and can extend and retract along the axial direction of the second section of electrical pipe 322, thereby adjusting the length of the electrical pipe.

[0035] In some embodiments, the pump pipe assembly may further include an adjusting device 340, which may be disposed on the oil pipe 310 and / or the electrical pipe 320, and can adjust the length of the oil pipe and the electrical pipe. In some embodiments, the adjusting device 340 may include a first holding member, a second holding member, and a connector. The first holding member may be disposed at the end of the second oil pipe 312 that accommodates the first oil pipe 311, the second holding member is disposed on the first oil pipe 311, and the connector is connected between the first and second holding members to fix the distance between the first and second holding members. The connector can constrain the position and distance between the first and second holding members. When the second holding member is in a locked state, the first and second oil pipes are locked; when the second holding member is in an unlocked state, the first oil pipe can extend and retract axially along the second oil pipe. In some embodiments, the first holding member may also be disposed at the end of the second segment of the circuit tube 322 that accommodates the first segment of the circuit tube 321, and the second holding member may be disposed on the first segment of the circuit tube 321. In some embodiments, the first holding member and / or the second holding member extend at least partially outward to form a circuit tube receiving portion for accommodating the second segment of the circuit tube, which can prevent the circuit tube from shifting and allow the circuit tube to extend and retract with the oil pipe.

[0036] Combination Figure 4 , Figure 5A and Figure 5B by Figure 6A and Figure 6B . Figure 4 This is a schematic diagram of a motor connector according to an embodiment of this application. Figure 5A and Figure 5B This is a schematic diagram of the two end face structures of a motor connector according to an embodiment of this application. Figure 6A and Figure 6B This is a cross-sectional view of a motor connector according to an embodiment of this application.

[0037] In some embodiments, the motor connector 330 includes a housing 331, which has multiple oil passages 332 and electrical passages 333 internally. (See reference) Figure 5A At one end of the motor connector 330, which connects to the oil pipe 310 and the electrical pipe 320, multiple oil passages converge at one point and are arranged parallel to and spaced apart from the electrical passage 333, thus allowing connection to the parallel oil pipe 310 and the electrical pipe 320; Reference Figure 5B The motor connector 330 is connected to the submersible motor at one end, with the circuit channel 333 located at the center and the oil passage 332 arranged around the circuit channel 333, so that it can be connected to the submersible motor. In some embodiments, the connection between the oil passage and the oil pipe, and the connection between the circuit channel and the circuit pipe, both include connecting threads.

[0038] In some embodiments, the cable plug can be inserted into the submersible motor through the circuit channel 333. The circuit channel 333 may also include a plug positioning groove 3331, which can accommodate and position the cable plug, so that when the motor connector is connected to the submersible motor, the cable plug can be inserted into the submersible motor to supply power to the submersible motor. In some embodiments, the circuit channel 333 may also include a sealing groove 3332, which can be used to accommodate a sealing ring to prevent oil from entering the circuit pipe 320 through the circuit channel 333 or affecting the connection between the cable plug and the submersible motor.

[0039] In some embodiments, the base 331 may be cast, and its outer dimensions gradually taper from the end connected to the submersible motor to the end connected to the pump pipe. In some embodiments, the outer periphery of the base may also include multiple reinforcing ribs 3311, which are connected to both ends of the base 331 to increase the structural strength of the base. In some embodiments, one of the reinforcing ribs is provided with an oblique channel 3333, which is part of the circuit channel, and can move the circuit channel from the center of the end connected to the submersible motor to the end connected to the pump pipe, where it is arranged parallel to the oil passage. In some embodiments, multiple reinforcing ribs 3311 may also be spaced apart from multiple oil passages, or in other words, multiple reinforcing ribs can divide the oil passage into multiple channels, where each oil passage corresponds to the oil outlet channel of the submersible motor.

[0040] In some embodiments, the end of the base 331 connected to the submersible motor may further include an outer edge 3312, which may extend outward along the plane perpendicular to the outer surface of the base. The outer edge 3312 may include a connecting portion for connecting the motor connector to the submersible motor. In some embodiments, the connecting portion may include one or more connecting holes 3313, which may be evenly spaced along the circumference of the outer edge to accommodate fasteners (e.g., bolts) passing through to connect the motor connector to the submersible motor. In some embodiments, the outer edge may also include a limiting portion, such as a positioning pin hole 3314, which may be used for circumferential positioning of the motor connector and the submersible motor, aligning the flow channels of the motor connector and the submersible motor, and aligning the cable plug and the submersible motor terminal block located in the circuit channel. In some embodiments, the base 331 may also include one or more set screw holes 3315, which may be located at the end of the base 331 connected to the pump pipe, preventing the threaded connection between the pump pipe and the base from loosening during long-term operation. In some embodiments, the material of the base may be metal. For example: ASTM A356 or HT200, etc.

[0041] The pump tube assembly of this application can serve as a connector between the submersible pump head and the submersible motor, with one end mounted on the pump head and the other end connected to the submersible motor. The interface size of the motor connector for the submersible motor is consistent with existing products, and existing submersible motors can be used with the pump tube assembly of this application. Furthermore, the pump tube assembly of this application separates the electrical conduit and the oil conduit, allowing for a relatively simple design of the pump head structure. This application further optimizes the structure of the pump head.

[0042] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A motor connector for a submersible pump, characterized in that, include The base, and the circuit channels and multiple oil channels disposed within the base; At the first end of the base, multiple oil passages are arranged around the circuit channel; at the second end of the base, the multiple oil passages converge at one point and are arranged in parallel with the circuit channel at intervals. The second end of the base is connected to parallel oil pipes and circuit pipes.

2. The motor connector for a submersible pump according to claim 1, characterized in that, The outer dimensions of the base gradually decrease from the first end to the second end.

3. The motor connector for a submersible pump according to claim 1, characterized in that, The first end of the seat includes an outer edge that extends outward along the plane where the first end is located, perpendicular to the outer surface of the seat, and the outer edge includes a connecting portion.

4. The motor connector for a submersible pump according to claim 3, characterized in that, The connecting portion includes one or more connecting holes, which are arranged at equal intervals along the outer edge.

5. The motor connector for a submersible pump according to claim 1, characterized in that, The seat includes one or more reinforcing ribs disposed along the outer surface of the seat from the first end and the second end, with the circuit channel extending from a reinforcing rib at the second end of the seat.

6. A submersible pump, comprising: Pump head, pump tubing, and submersible motor; Its characteristic is that it further includes a motor connector as described in any one of claims 1-5; The submersible motor is installed in the oil storage tank and is used to extract oil from the oil storage tank; The pump pipe is connected between the pump head and the submersible motor, and includes an oil pipe and an electrical pipe. The oil pipe is used to allow oil to pass through and leave the oil storage tank, and the electrical pipe is used to allow electrical wires to pass through and supply power to the submersible motor. The motor connector is disposed between the pump pipe and the submersible motor, and is used to connect the pump pipe and the submersible motor. The pump head is positioned above the opening of the oil storage tank and is used to allow oil and electrical wires to pass through. The circuit tube is located outside the oil circuit tube and is arranged parallel to the oil circuit tube.

7. The submersible pump according to claim 6, characterized in that, Both the oil pipe and the electrical pipe are retractable pipes, used to adjust the position of the submersible motor in the oil storage tank.

8. The submersible pump according to claim 7, characterized in that, The oil pipe includes a first oil pipe section and a second oil pipe section. One end of the first oil pipe section is disposed in the second oil pipe section and can extend and retract along the axial direction of the second oil pipe section. The circuit pipe includes a first circuit pipe section and a second circuit pipe section. One end of the first circuit pipe section is disposed in the second circuit pipe section and can extend and retract along the axial direction of the second circuit pipe section.

9. The submersible pump according to claim 7, characterized in that, Further includes: An adjusting device is provided on the oil pipe and / or the circuit pipe and is used to lock the length of the oil pipe and / or the circuit pipe.

10. The submersible pump according to claim 8, characterized in that, The second section of the oil pipe and the second section of the circuit pipe are connected to the second end of the motor connector as described in any one of claims 1-5.

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