A hydraulic centrifugal pump

Abstract

This application discloses a hydraulic centrifugal pump, solving the technical problems of high failure rate and inconvenience of use in existing motor-driven pumps. The hydraulic centrifugal pump includes a bent pipe shell, a drive assembly, and an impeller. The bent pipe shell includes a first straight pipe section and a second straight pipe section, with an inlet in the first straight pipe section. The drive assembly includes a base, a hydraulic component, and a drive shaft. The hydraulic component includes a power source, a hydraulic pump, an oil pipe, and a hydraulic motor connected in sequence. The hydraulic motor is detachably connected to the base, and the oil pipe is detachably connected to both the hydraulic motor and the hydraulic pump. The output shaft of the hydraulic motor is connected to the drive shaft. The impeller is connected to the drive shaft and located in the first straight pipe section, with its height higher than the inlet. This hydraulic pump is driven by a power source, converting mechanical energy into hydraulic energy to drive the hydraulic motor, thus realizing the movement and force transmission of the mechanical equipment. It is suitable for locations with special requirements and areas without power supply, achieving drainage capacity.

Description

Technical Field

[0001] This application belongs to the field of drainage equipment technology, and specifically relates to a hydraulic centrifugal pump. Background Technology

[0002] Currently, when centrifugal pumps are used as drainage equipment, many pump types require the outlet valve to be closed for startup, while fewer pump types require the outlet valve to be open for startup. Moreover, they require a large-power motor, which is prone to motor overheating and power supply system failures, resulting in a high failure rate. Large-flow centrifugal pumps are large in size and weight, and need to be installed on a fixed foundation. In areas without power supply or where the use of electrical equipment is not permitted, achieving drainage capacity is very difficult. The lack of lightweight and easy-to-install drainage equipment makes it impossible to achieve drainage in some areas. Summary of the Invention

[0003] To address the technical problems of high failure rates and inconvenience in using current motor-driven centrifugal pumps, this application provides a hydraulic centrifugal pump.

[0004] In a first aspect of this application, a hydraulic centrifugal pump is provided, comprising:

[0005] The bent pipe shell includes a first straight pipe section and a second straight pipe section connected and communicating with each other. The first straight pipe section is provided with an inlet, and the second straight pipe section is provided with an outlet for liquid discharge.

[0006] The drive assembly includes a base, a hydraulic assembly, and a drive shaft. The hydraulic assembly includes a power source, a hydraulic pump, an oil pipe, and a hydraulic motor connected in sequence. The hydraulic motor is detachably connected to the base, and the oil pipe is detachably connected to both the hydraulic motor and the hydraulic pump. The output shaft of the hydraulic motor is connected to the drive shaft, which extends into the first straight pipe section and extends axially along the first straight pipe section.

[0007] An impeller is connected to the drive shaft and located in the first straight pipe section, with the height of the impeller higher than the inlet.

[0008] The inlet of the first straight pipe section is used to extend into the storage container, the first straight pipe section is set at an angle to the bottom wall of the storage container, and the hydraulic motor is located on the liquid surface of the storage container.

[0009] In some embodiments, the oil pipe is provided with a first connector and a second connector at both ends;

[0010] The first connector is detachably connected to the hydraulic pump;

[0011] The second connector is detachably connected to the hydraulic motor.

[0012] In some embodiments, the base is provided with a mounting cavity coaxially connected to the first straight pipe section, one side of the base is provided with a mounting position, and the other side of the base is connected to the bent pipe shell.

[0013] In some embodiments, the hydraulic motor is provided with a first flange, and the mounting position is provided with a second flange corresponding to the first flange, wherein the first flange and the first flange are detachably connected by bolts and nuts.

[0014] In some embodiments, the output shaft of the hydraulic motor is coaxially connected to the drive shaft via a coupling or a spline sleeve.

[0015] In some embodiments, the inlet is located along the end of the first straight pipe section, and / or the inlet is located along the periphery of the lower end of the first straight pipe section.

[0016] In some embodiments, the centrifugal pump is further provided with a baffle connected to the inner wall of the straight pipe section, the baffle having a through hole through which the drive shaft passes;

[0017] The inner wall of the through hole is spaced apart from the outer wall of the impeller's inlet.

[0018] In some embodiments, the first straight pipe section and the second straight pipe section are made of the same material, namely steel, and the first straight pipe section is welded to the second straight pipe section;

[0019] The first straight pipe section and the second straight pipe section have a smooth transition.

[0020] In some embodiments, the base is made of steel and is welded to the bent pipe shell.

[0021] In some embodiments, the drive assembly further includes a bearing and a bearing housing located inside the first straight pipe section; the end of the drive shaft is connected to the bearing housing via the bearing;

[0022] The bearing housing is provided with a gap between itself and the inner wall of the first straight pipe section and is connected to the first straight pipe section through a stiffening plate.

[0023] A hydraulic centrifugal pump according to one or more embodiments of this application includes a bent pipe shell, a drive assembly, and an impeller. The bent pipe shell includes a first straight pipe section and a second straight pipe section connected and communicating with each other. The first straight pipe section has an inlet; the second straight pipe section has an outlet for liquid discharge. The drive assembly includes a base, a hydraulic assembly, and a drive shaft. The hydraulic assembly includes a power source, a hydraulic pump, an oil pipe, and a hydraulic motor connected in sequence. The hydraulic motor is detachably connected to the base, and the oil pipe is detachably connected to both the hydraulic motor and the hydraulic pump. The output shaft of the hydraulic motor is connected to the drive shaft, which extends into the first straight pipe section and along its axial direction. The impeller is connected to the drive shaft and located in the first straight pipe section, with its height higher than the inlet. The inlet of the first straight pipe section is used to extend into a storage container, and the first straight pipe section is angled to the bottom wall of the storage container. The hydraulic motor is located on the liquid surface of the storage container. The hydraulic pump of this application is driven by a power source, converting mechanical energy into hydraulic energy to drive the hydraulic motor, thereby realizing the movement of mechanical equipment and the transmission of force. It is suitable for locations with special requirements and areas without power supply, achieving drainage capacity. In addition, the hydraulic motor is detachably connected to the base, and the oil pipes are detachably connected to both the hydraulic motor and the hydraulic pump. The structure is simple and easy to install and disassemble. Attached Figure Description

[0024] Figure 1 A schematic diagram of the structure of a hydraulic centrifugal pump according to one or more embodiments of this application is shown.

[0025] Figure 2 It shows Figure 1 A schematic diagram of the hydraulic components.

[0026] Explanation of reference numerals in the attached drawings: 100-Hydraulic centrifugal pump, 110-Bend shell, 111-First straight pipe section, 112-Second straight pipe section, 113-First inlet, 114-Second inlet, 120-Drive assembly, 121-Base, 1211-Second flange, 122-Hydraulic assembly, 1221-Hydraulic pump, 1222-Oil pipe, 1223-Hydraulic motor, 1224-First flange, 123-Drive shaft, 124-Spline sleeve, 130-Impeller, 150-Mechanical seal, 160-Bearing housing, 161-Bearing, 162-Fir rib, 170-Baffle. Detailed Implementation

[0027] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] Please see Figure 1 and Figure 2 According to a first aspect of this application, a hydraulic centrifugal pump 100 is provided, including a bent pipe housing 110, a drive assembly 120, and an impeller 130. The bent pipe housing 110 includes a first straight pipe section 111 and a second straight pipe section 112 connected and communicating with each other. The first straight pipe section 111 has an inlet; the second straight pipe section 112 has an outlet for liquid discharge. The drive assembly 120 includes a base 121, a hydraulic assembly 122, and a drive shaft 123. The hydraulic assembly 122 includes a power source, a hydraulic pump 1221, an oil pipe 1222, and a hydraulic motor 1223 connected in sequence. The hydraulic motor 1223 is connected to the base 121. 1. Detachable connection: the oil pipe 1222 is detachably connected to both the hydraulic motor 1223 and the hydraulic pump 1221; the output shaft of the hydraulic motor 1223 is connected to the drive shaft 123, which extends into the first straight pipe section 111 and along the axial direction of the first straight pipe section 111; the impeller 130 is connected to the drive shaft 123 and located in the first straight pipe section 111, with the height of the impeller 130 higher than the inlet; wherein, the inlet of the first straight pipe section 111 is used to extend into the storage container, the first straight pipe section 111 is angled to the bottom wall of the storage container, and the hydraulic motor 1223 is located on the liquid surface of the storage container.

[0029] The bent pipe shell 110 includes a first straight pipe section 111 and a second straight pipe section 112 connected and communicating with each other. The first straight pipe section 111 and the second straight pipe section 112 are transitioned by an arc, wherein the first straight pipe section 111 and the second straight pipe section 112 are set at an angle. In some embodiments, the first straight pipe section 111 and the second straight pipe section 112 are perpendicular to each other. The second straight pipe section 112 is provided with an outlet for liquid discharge, that is, the second straight pipe section 112 can be connected to an external discharge pipe, etc., to ensure that the liquid entering from the first inlet 113 of the first straight pipe section 111 is smoothly discharged through the outlet.

[0030] The drive shaft 123 can rotate under the drive of the hydraulic assembly 122. Since the impeller 130 is mounted on the rotating shaft, the hydraulic assembly 122 drives the rotating shaft to rotate, and the rotating shaft drives the impeller 130 to rotate. The inlet of the impeller 130 is connected to the inlet of the first straight pipe section 111, and the outlet of the impeller 130 is connected to the outlet of the second straight pipe section 112. The motor drives the impeller 130 to rotate, and the liquid enters through the first inlet 113, then through the inlet of the impeller 130, and then exits through the outlet of the impeller 130.

[0031] In the hydraulic assembly 122, the hydraulic pump 1221 outputs hydraulic energy through a power source (not shown in the figure), which is converted into mechanical energy by driving the hydraulic motor 1223, thereby driving the centrifugal pump to achieve water supply and drainage functions. The hydraulic motor 1223 has advantages such as small size, light weight, simple structure, good manufacturability, insensitivity to oil contamination, impact resistance, and low inertia. It is easy to generalize, standardize, and serialize, has a long service life, and high efficiency. The hydraulic motor 1223 drive can effectively overcome the problems of electric drive, with a low failure rate and high starting efficiency. In some embodiments, the power source can be an internal combustion engine. By mounting the internal combustion engine and the hydraulic pump on a base support, equipped with a hydraulic oil control valve assembly and an oil tank, the output shaft of the internal combustion engine is connected to the hydraulic pump. When starting, the relief valve is opened to achieve no-load starting of the internal combustion engine. The internal combustion engine can run at a constant speed or a variable speed. Afterwards, the output pressure of the hydraulic oil is adjusted using the relief valve, and the high-speed hydraulic motor of the centrifugal pump is connected through an oil pipe to realize the function of the centrifugal pump. In other embodiments, the power source can be a vehicle with its own hydraulic pump. The vehicle is equipped with a hydraulic oil control valve assembly and an oil tank. After the vehicle stops at the designated position and is secured, an oil pipe is installed and connected to a hydraulic motor. The on-board hydraulic pump transmission device is adjusted, and the vehicle engine drives the hydraulic pump to run. The hydraulic pump outputs pressure to realize the function of a centrifugal pump.

[0032] The length of the oil pipe 1222 in the hydraulic assembly 122 is determined according to the actual site conditions and can be lengthened or shortened. It connects to the drain pipe to quickly achieve drainage capacity, which improves the mobility and flexibility of the centrifugal pump.

[0033] The hydraulic pump 1221 of this application is driven by a power source, converting mechanical energy into hydraulic energy to drive the hydraulic motor 1223, thereby realizing the movement and force transmission of the mechanical equipment. It is suitable for locations with special requirements and areas without power supply, achieving drainage capacity. Furthermore, the hydraulic motor 1223 is detachably connected to the base 121, and the oil pipe 1222 is detachably connected to both the hydraulic motor 1223 and the hydraulic pump 1221, resulting in a simple structure that is easy to install and disassemble. The centrifugal pump is directly placed in water, with the impeller 130 submerged and the hydraulic assembly 122 positioned on the liquid surface. The bent pipe shell 110 can be supported by a bracket or directly leaned against the wall of the storage container to operate the centrifugal pump and achieve drainage capacity.

[0034] In some embodiments, the oil pipe 1222 has a first connector and a second connector at both ends; the first connector is detachably connected to the hydraulic pump 1221; and the second connector is detachably connected to the hydraulic motor 1223. The first and second connectors can use standardized connection methods, such as threaded connections, compression fittings, or quick-connect couplings, to ensure the reliability and sealing of the connection; this application does not impose any special limitations. That is, by providing the first and second connectors on the oil pipe 1222, the hydraulic assembly 122 can be quickly disassembled and assembled, making operation convenient.

[0035] In some embodiments, the base 121 has a mounting cavity coaxially connected to the first straight pipe section 111, a mounting position is provided on one side of the base 121, and the other side of the base 121 is connected to the bent pipe shell 110. The mounting cavity facilitates the installation of the output shaft and drive shaft 123 of the hydraulic motor 1223, and the base 121 is convenient for installing the hydraulic motor 1223.

[0036] like Figure 2 As shown, in some embodiments, the hydraulic motor 1223 is provided with a first flange 1224, and a second flange 1211 corresponding to the first flange 1224 is provided at the mounting position. The first flange 1224 and the second flange 1211 are detachably connected by bolts and nuts. The first flange 1224 and the second flange 1211 are provided with corresponding connecting holes. By inserting bolts into the connecting holes and tightening them with nuts, the hydraulic motor 1223 is installed on the mounting position of the base 121, which facilitates the installation, disassembly and maintenance of the hydraulic motor 1223.

[0037] In some embodiments, the output shaft of the hydraulic motor 1223 is coaxially connected to the drive shaft 123 via a coupling or a spline sleeve 124. This coaxial connection ensures efficient and stable power transmission between the output shaft of the hydraulic motor 1223 and the drive shaft 123, enabling the mechanical equipment to operate smoothly and reliably.

[0038] In some embodiments, the inlet is provided at the end of the first straight pipe section 111. The inlet can be located at the end of the first straight pipe section 111 and is coaxial with the first straight pipe section 111, so that the liquid can smoothly enter along the axis of the straight pipe section and ensure the stability and uniformity of the fluid flow.

[0039] In other embodiments, the inlet is located circumferentially along the lower end of the first straight pipe section 111. The inlets are spaced apart circumferentially along the first straight pipe section 111. The inlet design has multiple openings, which are evenly spaced along the circumference of the straight pipe section, allowing fluid to enter the first straight pipe section 111 from different directions with a relatively uniform flow rate. This effectively reduces the fluid impact force at the first inlet 113, avoids excessively high local pressure and eddy currents caused by single-point inflow, thereby reducing energy loss and improving fluid transport efficiency.

[0040] like Figure 1 As shown, in some embodiments, the centrifugal pump is further provided with a baffle 170 connected to the inner wall of the straight pipe section. The baffle 170 has a through hole through which the drive shaft 123 passes. The inner wall of the through hole is spaced apart from the outer wall of the impeller 130 inlet. This can prevent liquid flowing out of the impeller 130 outlet from flowing back to the outlet, thus improving the discharge efficiency.

[0041] In some embodiments, the first straight pipe section 111 and the second straight pipe section 112 are made of the same material, both of which are steel. The first straight pipe section 111 is welded to the second straight pipe section 112, and the first straight pipe section 111 and the second straight pipe section 112 have a smooth transition. The welded connection has good sealing performance, which can prevent fluid leakage and ensure the safety and reliability of the production process.

[0042] In some embodiments, a mounting hole is provided at the smooth transition between the first straight pipe section 111 and the second straight pipe section 112. The mounting hole is coaxially arranged with the base 121 and the first straight pipe section 111 to ensure that the drive shaft 123 can pass through the mounting hole.

[0043] In some embodiments, the base 121 is made of steel and is welded to the bent pipe shell 110. The welded connection has good sealing performance, which can prevent fluid leakage and ensure the safety and reliability of the production process.

[0044] like Figure 1 As shown, in some embodiments, the drive assembly 120 further includes a bearing 161 and a bearing housing 160 located inside the first straight pipe section 111; the end of the drive shaft 123 is connected to the bearing housing 160 via the bearing 161; the drive shaft 123 is connected to the pipe wall via the bearing housing 160, forming a stable and efficient connection structure.

[0045] In other embodiments, the bearing housing 160 is provided with a gap between itself and the inner wall of the first straight pipe section 111, and is connected to the first straight pipe section 111 by a stiffener 162. This ensures that the liquid entering through the second inlet 114 can flow smoothly through the gap into the impeller 130.

[0046] In some embodiments, the drive shaft 123 is sealed to the mounting hole by a seal, which includes a rotating ring and a stationary ring. The rotating ring is connected to the drive shaft 123, and the stationary ring is connected to the mounting hole. The end face of the rotating ring is in close contact with the end face of the stationary ring. A mechanical seal 150 is used at the output end of the drive shaft 123. The rotating ring of the mechanical seal 150 is mounted on the drive shaft 123 with an interference fit, and the stationary ring is mounted at the mounting hole. The interference fit between the rotating ring and the drive shaft 123 ensures that the rotating ring rotates synchronously with the drive shaft 123 during equipment operation while maintaining a tight sealing contact. The stationary ring is mounted at the mounting hole, forming a sealing surface through precise contact with the rotating ring. This structural feature of the mechanical seal 150 allows the sealing surface to maintain good contact during equipment operation, effectively preventing liquid leakage from the gap between the drive shaft 123 and the pipe housing, reducing liquid loss, lowering the risk of environmental pollution, and improving the efficiency and safety of the equipment.

[0047] The hydraulic centrifugal pump 100 provided in this application effectively solves the technical challenge of achieving drainage capacity in locations without power supply using centrifugal pumps. It effectively overcomes the difficulties of on-site installation and disassembly of shell-and-tube centrifugal pumps, enables rapid drainage, provides high drainage efficiency, and improves on-site safety.

[0048] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0050] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A hydraulic centrifugal pump, characterized in that include: The bent pipe shell includes a first straight pipe section and a second straight pipe section connected and communicating with each other. The first straight pipe section is provided with an inlet, and the second straight pipe section is provided with an outlet for liquid discharge. The drive assembly includes a base, a hydraulic assembly, and a drive shaft. The hydraulic assembly includes a power source, a hydraulic pump, an oil pipe, and a hydraulic motor connected in sequence. The hydraulic motor is detachably connected to the base, and the oil pipe is detachably connected to both the hydraulic motor and the hydraulic pump. The output shaft of the hydraulic motor is connected to the drive shaft, which extends into the first straight pipe section and extends axially along the first straight pipe section. An impeller is connected to the drive shaft and located in the first straight pipe section, with the height of the impeller higher than the inlet. The inlet of the first straight pipe section is used to extend into the storage container, the first straight pipe section is set at an angle to the bottom wall of the storage container, and the hydraulic motor is located on the liquid surface of the storage container.

2. The hydraulic centrifugal pump according to claim 1, characterized in that The oil pipe is provided with a first connector and a second connector at both ends; The first connector is detachably connected to the hydraulic pump; The second connector is detachably connected to the hydraulic motor.

3. The hydraulic centrifugal pump of claim 1, wherein, The base is provided with a mounting cavity coaxially connected to the first straight pipe section, and a mounting position is provided on one side of the base. The other side of the base is connected to the bent pipe shell.

4. The hydraulic centrifugal pump according to claim 3, characterized in that The hydraulic motor is provided with a first flange, and the mounting position is provided with a second flange corresponding to the first flange. The first flange and the first flange are detachably connected by bolts and nuts.

5. The hydraulic centrifugal pump according to any of claims 1-4, characterized in that The output shaft of the hydraulic motor is coaxially connected to the transmission shaft via a coupling or a spline sleeve.

6. The hydraulic centrifugal pump according to any of claims 1-4, characterized in that The inlet is provided along the end of the first straight pipe section, and / or the inlet is provided along the periphery of the lower end of the first straight pipe section.

7. The hydraulic centrifugal pump according to any of claims 1-4, characterized in that The centrifugal pump is also provided with a baffle connected to the inner wall of the straight pipe section, the baffle having a through hole, and the drive shaft passing through the through hole; The inner wall of the through hole is spaced apart from the outer wall of the impeller's inlet.

8. The hydraulic centrifugal pump according to any one of claims 1-4, characterized in that, The first straight pipe section and the second straight pipe section are made of the same material, steel, and the first straight pipe section is welded to the second straight pipe section; The first straight pipe section and the second straight pipe section have a smooth transition.

9. The hydraulic centrifugal pump according to any of claims 1-4, characterized in that The base is made of steel and is welded to the bent pipe shell.

10. The hydraulic centrifugal pump according to any of claims 1-4, characterized in that The drive assembly also includes a bearing and a bearing housing located inside the first straight pipe section; the end of the drive shaft is connected to the bearing housing via the bearing; The bearing housing is provided with a gap between itself and the inner wall of the first straight pipe section and is connected to the first straight pipe section through a stiffening plate.

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