A sewage pump convenient to disassemble

Abstract

The embodiment of the present disclosure provides a kind of sewage pump of easy disassembly, comprising: pump shell, for accommodating internal components and forming fluid passage;Impeller, rotatably disposed in the pump shell;Driving shaft, fixedly connected to a plurality of the impeller center and extends to the outside of the pump shell;Sealing ring, around the driving shaft and be disposed in the gap between the pump shell and the driving shaft;Bearing, sleeve on the driving shaft and fixed in the pump shell, for supporting the rotation of driving shaft;Wherein, the sealing ring includes outer ring part and inner ring part, the outer surface of the outer ring part is provided with radial flange, and the radial flange and the axial groove of pump shell are detachably clamped;The inner ring part is detachably installed with spiral spring, and the spiral spring is abutted to the outer circumferential surface of the driving shaft to provide radial pressure.By the scheme of the embodiment of the present disclosure, it can be solved how to reduce the tool dependence when disassembling.

Description

Technical Field

[0001] This application relates to the field of fluid machinery technology, and more specifically to a sewage pump that is easy to disassemble. Background Technology

[0002] Sewage pumps designed for easy disassembly are typically modular in structure and employ quick-release interfaces or snap-fit ​​mechanisms to simplify maintenance and reduce downtime. However, in practical applications, these pumps face a significant problem: the disassembly process still relies on various specialized tools (such as specific types of wrenches or screwdrivers), which increases the complexity of the operation, tool preparation time, and potential risk of human error. Summary of the Invention

[0003] In view of this, the present disclosure provides a sewage pump that is easy to disassemble, which at least partially solves the problems existing in the prior art.

[0004] This application discloses an easily disassembled sewage pump, comprising:

[0005] Pump housing, used to house internal components and form fluid channels;

[0006] An impeller is rotatably mounted inside the pump casing;

[0007] A drive shaft is fixedly connected to the center of the multiple sets of impellers and extends to the outside of the pump casing;

[0008] A sealing ring surrounds the drive shaft and is disposed in the gap between the pump housing and the drive shaft;

[0009] A bearing, sleeved on the drive shaft and fixed inside the pump housing, is used to support the rotation of the drive shaft; wherein,

[0010] The sealing ring includes an outer ring portion and an inner ring portion. The outer surface of the outer ring portion is provided with a radial flange, which is detachably engaged with an axial groove in the pump housing. A helical spring is detachably installed on the inner ring portion, and the helical spring abuts against the outer circumferential surface of the drive shaft to provide radial pressure.

[0011] A disassembly groove extending axially is provided on the end face of the outer ring.

[0012] According to one embodiment, the disassembly groove of the sealing ring is deeper than 5 mm and wider than 3 mm to facilitate finger insertion.

[0013] According to one embodiment, a pull ring is fixedly connected to the outer ring portion, and the pull ring is disposed on the outer side of the end face of the outer ring portion to facilitate manual pulling.

[0014] According to one embodiment, there are two or more disassembly grooves, which are evenly distributed on the end face circumference of the outer ring portion.

[0015] According to one embodiment, the axial groove of the pump housing is provided with a guide slope, which slopes outward from the bottom of the axial groove to facilitate the sliding in and out of the flange of the outer ring portion.

[0016] According to one embodiment, the pump housing has a tool socket near the axial groove, the tool socket being connected to the disassembly groove to facilitate the direct insertion of a standard tool.

[0017] According to one embodiment, the end of the drive shaft is provided with a threaded portion for connecting a pull rod of a disassembly tool to facilitate pulling out the sealing ring.

[0018] According to one embodiment, the bearing is slidably connected to the pump housing and is axially movable through a groove structure to expose the sealing ring after removal.

[0019] According to one embodiment, the bearing is detachably fixed to the pump housing by a fixing screw, which is disposed on the outer ring of the bearing.

[0020] According to one embodiment, the impeller and the drive shaft are fixedly connected by a quick connector, the quick connector including a snap-fit ​​and a release button to facilitate the removal of the impeller.

[0021] This disclosure provides a disassembleable sewage pump, comprising: a pump casing for accommodating internal components and forming a fluid passage; an impeller rotatably disposed within the pump casing; a drive shaft fixedly connected to the center of multiple sets of impellers and extending to the outside of the pump casing; a sealing ring surrounding the drive shaft and disposed in the gap between the pump casing and the drive shaft; and a bearing sleeved on the drive shaft and fixed within the pump casing for supporting the rotation of the drive shaft. The sealing ring includes an outer ring portion and an inner ring portion. The outer surface of the outer ring portion has a radial flange, which detachably engages with an axial groove in the pump casing. A helical spring is detachably mounted on the inner ring portion, and the helical spring abuts against the outer circumferential surface of the drive shaft to provide radial pressure. An axially extending disassembly groove is formed on the end face of the outer ring portion. This disclosure solves the problem of reducing tool dependence during disassembly and assembly. Attached Figure Description

[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0023] Figure 1 This is a schematic diagram of a sewage pump that is easy to disassemble;

[0024] Figure 2 A cross-sectional structural diagram of a sewage pump that is easy to disassemble;

[0025] Figure 3 This is a schematic diagram of the internal structure of a sewage pump that is easy to disassemble.

[0026] Figure 4 This is a schematic diagram of the structure of a sealing ring for a sewage pump that is easy to disassemble.

[0027] In the diagram: 1. Pump casing; 2. Impeller; 3. Drive shaft; 4. Sealing ring; 41. Outer ring; 42. Inner ring; 43. Disassembly groove; 5. Bearing; 6. Pull ring; 7. Guide ramp; 8. Tool socket; 9. Threaded part; 10. Low-friction coating; 11. Fixing screw; 12. Quick connector Detailed Implementation

[0028] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0029] like Figure 1 and Figure 2 As shown, a disassembly-friendly sewage pump according to this application includes a pump casing 1, an impeller 2, a drive shaft 3, a sealing ring 4, and a bearing 5. The pump casing 1, as the main structure of the sewage pump, houses the internal components and forms a fluid passage. This component is manufactured through casting or molding processes and has inlet and outlet channels to facilitate fluid introduction and export. Its internal design includes axial grooves for easy detachable connection with other components such as the sealing ring 4. For example, the groove structure can be formed through machining to ensure the sealing of the fluid path and the stability of the overall structure.

[0030] Impeller 2 is rotatably mounted inside pump casing 1 for pumping fluid. This component is typically made of corrosion-resistant materials, such as stainless steel or engineering plastics, and has a central mounting hole for secure connection to drive shaft 3 via keyway or thread. The blade structure of impeller 2 is designed to optimize fluid dynamics performance, for example, by using backward-curved blades to reduce eddy current losses, thereby achieving efficient fluid transport.

[0031] The drive shaft 3 is fixedly connected to the center of multiple impellers 2 and extends to the outside of the pump casing 1 to transmit power. The shaft is made of high-strength metal material such as alloy steel, and the surface is hardened to improve wear resistance. During installation, the drive shaft 3 passes through the inside of the pump casing 1, with one end fixedly connected to the impeller 2 and the other end coupled to an external drive source (such as a motor), for example, through a coupling or flange connection, to ensure the reliability of power transmission and rotational accuracy.

[0032] A sealing ring 4 surrounds the drive shaft 3 and is disposed in the gap between the pump housing 1 and the drive shaft 3 to prevent fluid leakage. This component includes an outer ring 41, an inner ring 42, and a disassembly groove 43 (see details). Figure 4 The outer surface of the outer ring 41 is provided with a radial flange, which is detachably engaged with the axial groove of the pump housing 1, for example, by means of a resilient snap-fit ​​structure to achieve quick installation and removal; the inner surface of the inner ring 42 is provided with a helical spring, which abuts against the outer circumferential surface of the drive shaft 3 to provide radial pressure, for example, by using a stainless steel spring ring to achieve dynamic sealing; the disassembly groove 43 is provided on the end face of the outer ring 41 and extends axially, which facilitates the direct insertion of tools to pry open the sealing ring 4, for example by forming a notch by machining, allowing non-destructive disassembly using general tools (such as screwdrivers), thereby simplifying the operation.

[0033] The bearing 5 is mounted on the drive shaft 3 and fixed inside the pump housing 1 to support the rotation of the drive shaft 3. This component adopts a standard ball bearing 5 or a sliding bearing 5 structure and is fixed in the bearing 5 seat of the pump housing 1 by press-fit or bolts; for example, the inner ring of the bearing 5 is interference-fitted with the drive shaft 3, and the outer ring is fixedly connected to the pump housing 1 to reduce friction and bear radial load, ensuring smooth rotation and long-term reliability of the drive shaft 3.

[0034] The sewage pump of this application effectively solves the technical problem of reducing tool dependence during disassembly and assembly through the design of the sealing ring 4. Specifically, the outer ring 41 of the sealing ring 4 is provided with a disassembly groove 43, which extends axially along the end face, allowing users to directly insert a general-purpose tool (such as a flathead screwdriver) to pry open the sealing ring 4 without relying on special disassembly tools or complex operations; at the same time, the radial flange of the outer ring 41 and the axial groove of the pump housing 1 adopt a detachable engagement structure, simplifying the installation and disassembly process. This design significantly reduces the tool requirements during maintenance, improves disassembly and assembly efficiency, and only simple tools are needed to replace the sealing ring 4, reducing downtime and labor costs.

[0035] like Figure 4 As shown, in one embodiment, the sealing ring 4, as a key component of the sewage pump, directly affects maintenance efficiency. A disassembly groove 43 is provided on the end face of the outer ring portion 41 of the sealing ring 4. This groove extends axially to simplify the disassembly process. By optimizing the geometry of the groove, this structure significantly improves operability. Specifically, the depth of the disassembly groove 43 is designed to be greater than 5 mm and the width greater than 3 mm. This size range ensures sufficient space to accommodate the operator's fingers. This configuration avoids the need for traditional tools and reduces maintenance complexity. Furthermore, the groove's position on the end face of the outer ring portion 41 allows fingers to be directly inserted into the groove during operation, applying prying force to separate the sealing ring 4 from the pump housing 1.

[0036] Specifically, the depth and width parameters of the disassembly groove 43 are achieved through precision machining to ensure its compatibility with the overall structure of the sealing ring 4. A depth greater than 5 mm provides sufficient insertion depth to prevent finger slippage; a width greater than 3 mm accommodates the size range of typical adult fingers. The axial extension direction of the groove is parallel to the axis of the drive shaft 3, facilitating the operator to apply uniform force in the radial direction. This design not only enhances the detachability of the connection but also optimizes ergonomics, enabling efficient disassembly tasks even in confined spaces.

[0037] For example, a groove with a depth of 6 mm and a width of 4 mm is machined on the end face of the outer ring portion 41 of the sealing ring 4. The groove extends axially and is formed by CNC milling to ensure that the groove wall is smooth and burr-free. Specifically, during the assembly process, the operator only needs to insert his finger into the groove and apply radial prying force to easily separate the radial flange of the outer ring portion 41 of the sealing ring 4 from the axial groove of the pump housing 1, thereby achieving quick disassembly.

[0038] like Figure 4 As shown, in one embodiment, a pull ring 6 is provided on the outer ring portion 41 of the sealing ring 4. The pull ring 6 is fixedly connected to the outer region of the end face of the outer ring portion 41. Specifically, the pull ring 6 is configured to extend radially outward from the end face of the outer ring portion 41 so that the operator can directly grasp and pull it by hand. This arrangement avoids the reliance on additional tools during disassembly, and the structure of the pull ring 6 is typically annular or U-shaped, made of corrosion-resistant metal or engineering plastic to withstand the mechanical stress during disassembly. The fixed connection method includes, but is not limited to, welding, bonding, or mechanical fastening, ensuring a reliable rigid connection between the pull ring 6 and the outer ring portion 41, thereby transmitting tensile force in the axial direction, directly acting on the disassembly action of the sealing ring 4.

[0039] Specifically, the pull ring 6 is fixed to the outer end face of the outer ring 41 of the sealing ring 4 by riveting. Specifically, the base part of the pull ring 6 is connected to the end face of the outer ring 41 by rivets to form an integrated structure, which makes it easy for the operator to manually apply pulling force to simplify the disassembly path.

[0040] like Figure 4As shown, in one embodiment, the inner ring portion 42 of the sealing ring 4 is provided with a helical spring, which is detachably mounted on the inner surface of the inner ring portion 42. Specifically, this mounting method is achieved through a spring-clamp structure, which allows the helical spring to be directly fixed to the inner surface of the inner ring portion 42, facilitating quick disassembly and replacement, thereby minimizing the need for special tools. The spring-clamp structure is designed such that the inner surface of the inner ring portion 42 includes a slot or receiving groove, while the end of the helical spring is equipped with elastic claws or protrusions; these claws can elastically deform to engage with the slots to form a detachable connection. During installation, after the claws of the helical spring are aligned with the slots, they can be locked by a slight press; during disassembly, only a reverse force needs to be applied to disengage the claws from the slots to remove the spring.

[0041] Furthermore, the spring-loaded snap-fit ​​structure includes an annular groove on the inner surface of the inner ring 42, which is evenly distributed circumferentially and matches the claws at the end of the helical spring. The claws are typically made of spring material, possessing elastic restoring properties to ensure stable radial pressure after engaging the groove, while also allowing for manual replacement. In terms of connection, the helical spring is directly fixed to the inner surface of the inner ring 42 via the engagement of the claws and grooves, eliminating the need for additional fasteners and simplifying the installation process.

[0042] For example, the end of the coil spring is provided with multiple elastic claws, which are hook-shaped; the inner surface of the inner ring 42 is machined with corresponding annular grooves. When the coil spring is pushed into the inner ring 42, the claws elastically deform and engage in the grooves for fixation; when replacing, the user can use their fingers or a simple pry tool to press the claws to release the engagement, thereby removing the old spring and installing the new spring.

[0043] like Figure 4 As shown, in one embodiment, the sealing ring 4 has multiple disassembly grooves 43, specifically no fewer than two, arranged on the circumference of the end face of the outer ring portion 41 of the sealing ring 4. These disassembly grooves 43 extend axially to facilitate direct insertion of tools. The mounting position is fixed to the end face of the outer ring portion 41, ensuring that the groove openings face outwards for easy access from outside the pump housing 1. Structurally, the disassembly grooves 43 are evenly distributed across the entire circumference, forming a symmetrical arrangement to support simultaneous application of force at multiple locations. This configuration optimizes the coordination of the disassembly process through the balanced points on the circumference.

[0044] Specifically, the even distribution of the disassembly grooves 43 allows the operator to select multiple symmetrical points on the circumference of the outer ring portion 41 of the sealing ring 4 for simultaneous prying operations. The depth and width of each groove are adapted to standard tool sizes, ensuring that the tool can be firmly inserted without slipping. In terms of connection, the disassembly grooves 43 are integrally formed with the outer ring portion 41, avoiding the addition of additional parts and thus maintaining the integrity of the sealing ring 4. This design simplifies the tool operation steps, requiring only the application of force at multiple points on the circumference to achieve the separation of the sealing ring 4.

[0045] For example, the outer ring portion 41 of the sealing ring 4 has three disassembly grooves 43, evenly spaced at 120-degree intervals. Specifically, during operation, multiple pry bars are simultaneously inserted into these grooves, applying a uniform outward force along the axial direction to collaboratively pry open the sealing ring 4 and detach it from the axial groove of the pump housing 1. For example, in this embodiment, the depth and position of the grooves are designed to fit the size of the pry bar head, ensuring a balanced distribution of force during multi-point operation.

[0046] like Figure 2 As shown, in one embodiment, a guide ramp 7 is provided in the axial groove of the pump housing 1. The guide ramp 7 starts from the bottom of the groove and extends outward at an angle, forming a sloping guide structure to facilitate the smooth sliding of the radial flange of the outer ring 41 of the sealing ring 4 into or out of the groove during operation. Specifically, the guide ramp 7 is located in the inlet region of the groove, and its inclination angle is optimized to ensure that the flange can move along the ramp direction, thereby reducing resistance during installation or disassembly.

[0047] The guide ramp 7 is designed to directly engage with the flange of the outer ring 41 of the sealing ring 4. The flange is structured to slide along the ramp. This connection method avoids the flange getting stuck in the groove. Through the guiding effect of the ramp, the flange can easily enter or leave the groove in the axial direction without applying excessive external force. For example, during disassembly, the flange slides outward along the ramp and naturally exits the groove position, significantly reducing the need for prying with tools.

[0048] Specifically, the guide ramp 7 can be achieved during the machining of the axial groove in the pump housing 1. For example, the bottom of the groove is cut or cast into an outwardly inclined surface. Specifically, the ramp extends outward from the depth of the groove at an angle of 15 to 30 degrees, so that the flange of the outer ring 41 of the sealing ring 4 is directly aligned with the groove entrance during assembly and pushed into place along the ramp. Similarly, the flange slides out in the opposite direction during disassembly without the need for tool intervention to pry it.

[0049] like Figure 1 As shown, in one embodiment, a tool socket 8 is disposed on the pump housing 1 and located near an axial groove in the pump housing 1. The tool socket 8 serves as a channel opening extending inward from the outer surface of the pump housing 1, directly connecting to the disassembly groove 43 of the sealing ring 4. For example, the tool socket 8 can be designed as a through hole or slot, with its internal path aligned with the disassembly groove 43, ensuring that standard tools can be inserted in a straight line. This arrangement provides a guiding function, allowing tools to directly reach the disassembly groove 43, thereby simplifying the operating path.

[0050] Specifically, a cylindrical through hole is machined in the side wall region of the axial groove of the pump housing 1 as a tool insertion port 8. The through hole penetrates the wall of the pump housing 1, and its inner end is precisely aligned with the end face of the disassembly groove 43 of the sealing ring 4. The tool can be directly and vertically inserted into the through hole and act on the disassembly groove 43.

[0051] like Figure 2 As shown, in one embodiment, a threaded portion 9 is provided at the end of the drive shaft 3, located in the end region where the drive shaft 3 extends to the outside of the pump housing 1. The threaded portion 9 is designed to mate with the pull rod of a dedicated disassembly tool to achieve a reliable connection. Specifically, the threaded portion 9 is formed on the axial end face of the drive shaft 3 using a standard or custom thread type (such as a male thread), ensuring that sufficient torque and tension can be transmitted during disassembly. This structure allows the operator to directly apply axial force to the sealing ring 4 by rotating the pull rod, thereby simplifying the disassembly process.

[0052] The threaded portion 9 is designed to match the threaded interface of the disassembly tool's pull rod. When the pull rod is screwed into the threaded portion 9, the rotational motion is converted into linear tension. This tension is directly transmitted to the sealing ring 4, avoiding additional intervention to the pump housing 1 or other components. The sealing ring 4 surrounds the drive shaft 3 and is located in the gap of the pump housing 1. By applying axial force, it can be efficiently disengaged from the engaged position, reducing disassembly time and tool complexity.

[0053] For example, the disassembly tool is equipped with a pull rod with internal threads, which can be manually screwed into the threaded portion 9 at the end of the drive shaft 3. During operation, the user rotates the pull rod, generating axial displacement through the thread engagement, thereby pulling the sealing ring 4 out of the pump housing 1. For example, the length of the pull rod can be designed to be adjustable to accommodate different pump body sizes, ensuring that the disassembly process is simple and reliable.

[0054] like Figure 2 As shown, in one embodiment, the outer peripheral surface of the drive shaft 3 is covered with a low-friction coating 10. This coating is applied directly to the outer surface of the drive shaft 3, located in the area where the drive shaft 3 contacts the inner ring 42 of the sealing ring 4. Specifically, the coating uniformly covers the entire outer peripheral surface of the drive shaft 3, ensuring a low-friction interface is formed when the inner ring 42 of the sealing ring 4 is installed and abuts. The presence of this coating reduces the coefficient of friction between the drive shaft 3 and the inner ring 42 of the sealing ring 4, thereby reducing sliding resistance during disassembly. For example, the coating uses materials with excellent wear resistance and self-lubricating properties, such as polytetrafluoroethylene or molybdenum disulfide composites, which adhere to the surface of the drive shaft 3 through chemical bonding or physical adsorption, maintaining long-term stability.

[0055] During disassembly, the low-friction coating 10 allows the inner ring 42 of the seal ring 4 to slide more smoothly along the axial direction of the drive shaft 3. When a tool is inserted into the disassembly slot 43 to pry open the seal ring 4, the low-friction properties of the coating reduce the adhesive force between the inner ring 42 and the drive shaft 3, preventing jamming or damage during disassembly. Specifically, the coating thickness is controlled within the micrometer range, for example, 0.01 to 0.05 mm, to balance the friction reduction effect with structural strength, while not interfering with the radial pressure of the helical spring in the inner ring 42 of the seal ring 4. Furthermore, the application area of ​​the coating precisely covers the contact path of the inner ring 42 of the seal ring 4, ensuring minimal frictional resistance during disassembly.

[0056] like Figure 2 As shown, in one embodiment, the bearing 5 is slidably mounted inside the pump housing 1, achieving axial movement through a specific sliding groove structure. This sliding groove structure includes axial guide rails or protrusions on the outer surface of the bearing 5 and corresponding axial channels on the inner wall of the pump housing 1. These two components cooperate to allow the bearing 5 to slide smoothly along the axis of the drive shaft 3, while ensuring that the bearing 5 maintains a stable position during normal operation. This mounting method avoids a fixed connection, allowing the bearing 5 to be directly removed for maintenance without disassembling the pump housing 1 or other core components. Specifically, the design of the sliding groove structure considers the degree of freedom of axial displacement, for example, by controlling the gap between the guide rail and the channel to prevent radial offset or jamming of the bearing 5 during sliding, thereby improving operational reliability.

[0057] The axial movement achieved through this sliding structure facilitates direct access to the sealing ring 4 after the bearing 5 is removed. The sealing ring 4 is located in the gap between the pump housing 1 and the drive shaft 3. When the bearing 5 is slid out, the sealing ring 4 is fully exposed, allowing the operator to access its removal slot 43 without additional steps. This simplifies the disassembly and assembly path, reducing the complexity of traditional maintenance requiring the removal of multiple components, such as avoiding interference from the drive shaft 3 or impeller 2. Simultaneously, the sliding structure maintains the relative position of the bearing 5 and the drive shaft 3 during axial movement, ensuring quick alignment during reinstallation, making the maintenance process efficient and safe.

[0058] For example, the slide structure includes an axially extending T-shaped key formed on the outer peripheral surface of the bearing 5, and a corresponding T-shaped slide groove machined on the inner wall of the pump housing 1. The key and the slide groove fit precisely, allowing the bearing 5 to slide freely within the pump housing 1 along the axis of the drive shaft 3; for example, during disassembly, the operator can apply axial force to slide the bearing 5 out, thereby directly exposing the sealing ring 4, which is then easily pried open by tools through its disassembly groove 43.

[0059] like Figure 3As shown, in one embodiment, the bearing 5 is detachably fixed to the internal structure of the pump housing 1 by fixing screws 11. Specifically, the bearing 5 is sleeved on the drive shaft 3, and its outer ring is designed as the location for mounting the fixing screws 11. These screws are directly connected to the inner wall of the pump housing 1, forming a detachable mechanical connection. This fixing method allows the bearing 5 to be quickly removed for maintenance without disturbing other core components of the pump. The fixing screws 11 are located on the outer ring of the bearing 5, meaning that the screw heads are exposed on the outer circumferential surface of the bearing 5, facilitating direct operation using standard tools such as screwdrivers or wrenches. After loosening the screws, the bearing 5 can be slid out along the axial direction of the drive shaft 3, thereby directly exposing the location of the sealing ring 4. The sealing ring 4 surrounds the drive shaft 3 and is located in the gap between the pump housing 1 and the drive shaft 3. Its design facilitates immediate access after the bearing 5 is removed, simplifying the entire maintenance process.

[0060] Specifically, multiple fixing screws 11 are evenly distributed on the outer ring of the bearing 5. These screws pass through the pre-drilled holes on the outer ring of the bearing 5 and are screwed into the corresponding threaded holes on the inner wall of the pump housing 1. After the screws are loosened by rotating the tool counterclockwise, the bearing 5 can be easily pulled out along the direction of the drive shaft 3, so that the sealing ring 4 is fully exposed to the external environment, which is convenient for direct replacement or inspection.

[0061] like Figure 2 As shown, in one embodiment, the fixed connection between the impeller 2 and the drive shaft 3 employs a quick connector 12, designed for ease of operation and maintenance. Specifically, the quick connector 12 includes a snap-fit ​​mechanism and a release button. The snap-fit ​​mechanism reliably locks the impeller 2 and drive shaft 3, ensuring a stable connection during power transmission in pump operation. The release button is located externally to the connector, allowing for manual operation by the user to release the snap-fit ​​and quickly disassemble the impeller 2. This design allows the impeller 2 to be removed without additional tools, directly exposing the location of the sealing ring 4 in the gap between the drive shaft 3 and the pump housing 1, facilitating subsequent inspection or replacement of the sealing ring 4.

[0062] Specifically, the quick connector 12 preferably features a modular design, wherein the snap-fit ​​mechanism includes at least one elastically deformable claw that engages with a groove at the end of the drive shaft 3 to form a mechanical interlock. A release button is linked to the claw via a linkage or sliding mechanism; when the button is pressed, it forces the claw out of the groove, disengaging the impeller 2 from the drive shaft 3. In terms of installation position, the quick connector 12 is integrally integrated between the center hole of the impeller 2 and the end of the drive shaft 3, ensuring that the area of ​​the sealing ring 4 surrounding the drive shaft 3 is fully exposed after disassembly of the impeller 2, facilitating direct access.

[0063] For example, the latching mechanism includes a pair of symmetrically arranged spring-loaded claws that are embedded in the end of the drive shaft 3 and are driven to retract radially by the axial movement of the release button. Specifically, the release button is located on the outer surface of the impeller 2 for easy pressing with a finger. During operation, the displacement of the button is transmitted to the claws, causing them to disengage from the slots in the inner wall of the impeller 2, thereby enabling the impeller 2 to be disassembled with one hand to expose the installation position of the sealing ring 4.

[0064] In actual operation, when this device is in use, an external power source drives the drive shaft 3 to rotate. The drive shaft 3 drives the fixedly connected impeller 2 to rotate inside the pump casing 1, thereby pumping fluid through the fluid channel formed by the pump casing 1. The sealing ring 4 surrounds the drive shaft 3 and is set in the gap between the pump casing 1 and the drive shaft 3. Its inner ring 42 abuts against the outer circumferential surface of the drive shaft 3 through a helical spring to provide radial pressure to prevent fluid leakage. At the same time, the bearing 5 is sleeved on the drive shaft 3 and fixed inside the pump casing 1 to support the smooth rotation of the drive shaft 3. When it is necessary to disassemble the sealing ring 4 for maintenance, the operator can insert a tool into the disassembly groove 43 on the end face of the outer ring 41 of the sealing ring 4 and pry it along the axial direction to separate the radial flange of the outer ring 41 from the axial groove of the pump casing 1, thereby realizing the quick removal of the sealing ring 4.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0066] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A sewage pump that is easy to disassemble, characterized in that, include: Pump housing (1) is used to house internal components and form a fluid passage; An impeller (2) is rotatably disposed within the pump casing (1); The drive shaft (3) is fixedly connected to the center of the multiple sets of impellers (2) and extends to the outside of the pump casing (1); A sealing ring (4) surrounds the drive shaft (3) and is disposed in the gap between the pump housing (1) and the drive shaft (3); A bearing (5) is sleeved on the drive shaft (3) and fixed inside the pump housing (1) to support the rotation of the drive shaft (3); wherein, The sealing ring (4) includes an outer ring (41) and an inner ring (42). The outer ring (41) has a radial flange on its outer surface, which can be detachably engaged with the axial groove of the pump housing (1). The inner ring (42) is detachably equipped with a helical spring, which abuts against the outer circumferential surface of the drive shaft (3) to provide radial pressure. The outer ring (41) has an axially extending disassembly groove (43) on its end face.

2. The easily disassembled sewage pump according to claim 1, characterized in that: The disassembly groove (43) of the sealing ring (4) has a depth greater than 5 mm and a width greater than 3 mm to facilitate finger insertion.

3. A sewage pump that is easy to disassemble according to claim 1, characterized in that: A pull ring (6) is fixedly connected to the outer ring (41). The pull ring (6) is located on the outer side of the end face of the outer ring (41) so as to be pulled manually.

4. A sewage pump that is easy to disassemble according to claim 1, characterized in that: The disassembly groove (43) is provided in two or more parts and is evenly distributed on the end face circumference of the outer ring (41).

5. A sewage pump that is easy to disassemble according to claim 1, characterized in that: The axial groove of the pump housing (1) is provided with a guide slope (7), which is inclined outward from the bottom of the axial groove to facilitate the sliding in and out of the flange of the outer ring (41).

6. A sewage pump that is easy to disassemble according to claim 1, characterized in that: The pump housing (1) has a tool socket (8) near the axial groove, and the tool socket (8) is connected to the disassembly groove (43) to facilitate the direct insertion of standard tools.

7. A sewage pump that is easy to disassemble according to claim 1, characterized in that: The end of the drive shaft (3) is provided with a threaded part (9), which is used to connect the pull rod of the disassembly tool so as to pull out the sealing ring (4).

8. A sewage pump that is easy to disassemble according to claim 1, characterized in that: The bearing (5) is slidably connected inside the pump housing (1) and moves axially through a groove structure so that the sealing ring (4) can be exposed after removal.

9. A sewage pump that is easy to disassemble according to claim 1, characterized in that: The bearing (5) is detachably fixed inside the pump housing (1) by a fixing screw (11), which is located on the outer ring of the bearing (5).

10. A sewage pump that is easy to disassemble according to claim 1, characterized in that: The impeller (2) is fixedly connected to the drive shaft (3) via a quick connector (12), which includes a snap-fit ​​and a release button to facilitate the removal of the impeller (2).

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