Quick dismounting structure of submersible pump body cavity

Abstract

This invention discloses a quick-assembly and disassembly structure for a submersible pump body cavity, comprising a pump body and a pump cover. The space formed by the pump cover and the pump body constitutes a pump cavity. An axial elastic preload is provided between the pump cover and the pump body. The axial elastic preload is used to generate axial elastic force after the pump cover and the pump body are assembled, and to maintain a sealed fit between the pump cover and the pump body. The pump cover and the pump body are detachably connected by a snap-fit ​​structure. The axial elastic force generated by the axial elastic preload acts on the snap-fit ​​structure, keeping the snap-fit ​​structure in a locked and tensioned state, thereby preventing axial and circumferential relative movement between the pump cover and the pump body. This quick-assembly and disassembly structure for a submersible pump body cavity has the advantages of compact structure and convenient assembly and disassembly.

Description

Technical Field

[0001] This invention relates to the field of submersible pump technology, and more specifically to a quick disassembly and assembly structure for the pump body cavity of a submersible pump. Background Technology

[0002] Submersible pumps are widely used in municipal drainage, sewage treatment, industrial wastewater discharge and other scenarios. Their pump body cavity is in an underwater or fluid environment containing impurities for a long time. Mud, sand, fibers and debris can easily enter the pump cavity and wrap around the impeller and block the flow channel, requiring frequent disassembly of the pump cover for cleaning and maintenance.

[0003] Currently, the mainstream connection method for submersible pump bodies and covers is flange bolt connection: both the pump body and cover are equipped with flanges, fastened with multiple bolts, and sealed with a gasket in between. This traditional structure has the following significant drawbacks: 1. Extremely low disassembly and assembly efficiency: Each cleaning requires disassembling / tightening multiple bolts one by one, which is cumbersome, time-consuming and labor-intensive, especially in narrow spaces such as underground wells and water collection wells, where the operation is difficult and inefficient.

[0004] 2. Rusting and seizing, unable to disassemble: When immersed in sewage, salt water or humid environments for a long time, the flange bolts are very prone to rusting and seizing, which makes it impossible to disassemble the pump cover normally and delays maintenance. Summary of the Invention

[0005] To overcome the above-mentioned shortcomings in the prior art, the present invention provides a compact and easy-to-assemble / disassemble submersible pump body cavity quick-disassembly and assembly structure.

[0006] The technical solution of this invention is as follows: A quick-assembly and disassembly structure for a submersible pump body cavity includes a pump body and a pump cover. The space formed by the pump cover and the pump body forms a pump cavity. An axial elastic preload is provided between the pump cover and the pump body. The axial elastic preload is used to generate axial elastic force after the pump cover and the pump body are assembled, and to keep the pump cover and the pump body in a sealed fit. The pump cover and the pump body are detachably connected by a snap-fit ​​structure, which is used to axially lock the pump cover in a closed position. The axial elastic force generated by the axial elastic preload acts on the snap-fit ​​structure, keeping the snap-fit ​​structure in a snap-fit ​​and tensioned state, thereby preventing axial and circumferential relative movement between the pump cover and the pump body.

[0007] Preferably, the axial elastic preload includes an annular sealing ring, multiple springs, and a support ring; The annular sealing ring has a waisted structure, one end of which is connected to the pump body, and the other end of which is movably fitted to the inner wall of the pump cover. When the pressure inside the pump chamber increases, the annular sealing ring expands outward under the pressure to seal the gap between the pump cover and the pump body. One end of the spring is connected to the pump body, and the other end is connected to the support ring. The spring transmits elastic force to the pump cover through the support ring.

[0008] In any of the above embodiments, it is preferred that the pump body is provided with an annular boss, the body of the annular boss is provided with a plurality of stepped holes, a guide rod is slidably connected to the stepped holes, one end of the guide rod is constrained in the stepped holes, the other end is connected to the support ring, the spring is sleeved on the guide rod, and both ends abut against the annular boss and the support ring respectively.

[0009] In any of the above embodiments, it is preferred that a gasket is further provided between the pump body and the pump cover, and the gasket is arranged in a ring between the snap-fit ​​structure and the axial elastic preload.

[0010] In any of the above embodiments, it is preferred that a guide slope is provided on the inner wall of the insertion end of the pump cover and the annular sealing ring.

[0011] In any of the above embodiments, it is preferred that one end of the annular sealing ring is clamped at the pump body by the annular boss.

[0012] In any of the above embodiments, it is preferred that a protective shell is also provided on the side wall of the pump cover, the protective shell being used to prevent foreign objects in the fluid to be transported from impacting the annular sealing ring.

[0013] In any of the above embodiments, it is preferred that the buckle structure includes a hook and a slot that cooperate with each other, and the hook can be inserted into the slot; When the hook is inserted into the slot, the pump cover and the pump body rotate relative to each other to lock the hook into the slot.

[0014] In any of the above embodiments, it is preferred that the hook and the slot are engaged by a toothed surface.

[0015] In any of the above embodiments, it is preferred that there is a fitting gap between the two sides of the hook and the slot, which allows a tool to be inserted to achieve relative rotation between the pump cover and the pump body.

[0016] The quick-assembly and disassembly structure of the submersible pump body cavity of the present invention provides an axial elastic pre-tightening component and a snap-fit ​​structure between the pump cover and the pump body. The axial elastic pre-tightening component provides axial elastic force between the pump cover and the pump body to maintain a sealed fit, and the snap-fit ​​structure achieves axial locking, thus achieving the beneficial effect of a compact structure.

[0017] The snap-fit ​​structure can be engaged and unengaged by rotating the pump cover. With the help of the axial elastic preload, the snap-fit ​​structure is kept engaged and tensioned. The pump cover and pump body can be quickly assembled and disassembled, making assembly and disassembly convenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the pump cover and pump body in the separated state of the quick-release structure of the submersible pump cavity of the present invention.

[0019] Figure 2 This is a schematic diagram of a preferred embodiment of the quick-release structure for the submersible pump body cavity of the present invention, showing the cooperation between the axial preload and the pump body.

[0020] Figure 3 This is a cross-sectional schematic diagram of a preferred embodiment of the quick-release structure for the submersible pump body cavity of the present invention after assembly.

[0021] Figure 4 for Figure 3 An enlarged view of the axial preload component and the fit between the pump cover and pump body in the embodiment shown.

[0022] Figure 5 This is a schematic diagram of an embodiment of the alignment method of the hook and slot when the pump cover and pump body of the submersible pump cavity quick-release structure of the present invention are inserted.

[0023] Figure 6 This is a schematic diagram of a preferred embodiment of the quick-release structure for the submersible pump body cavity of the present invention, showing the cooperation between the hook and slot of the snap-fit ​​structure.

[0024] Figure 7 This is a schematic diagram of an embodiment of the pry bar-assisted snap-fit ​​structure for quick disassembly and assembly of the submersible pump body cavity according to the present invention.

[0025] Explanation of the labels in the diagram: 101-Pump body; 102-Pump cover; 103-Support; 104-Hook; 105-Slot; 106-Annular seal; 107-Guide rod; 108-Annular boss; 109-Stepped hole; 110-Spring; 111-Support ring; 112-Protective shell; 113-Gasket; 114-Pry bar; 115-Impeller; 116-Filter screen. Detailed Implementation

[0026] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for 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 the invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] Example 1: This submersible pump features a quick-release and disassembly structure for the pump body cavity. It is mainly used in applications where foreign objects are prone to become stuck in the pump cavity, such as when pumping sewage or media containing impurities. This structure significantly improves the ease of pump maintenance and cleaning.

[0029] like Figure 1 As shown, the submersible pump's quick-release structure includes a pump body 101 and a pump cover 102, which interlock to form a sealed pump cavity. The pump body 101 primarily houses the drive motor, whose output shaft passes through the pump body 101 and extends into the pump cavity to drive the impeller 115 to rotate, thus transporting fluid. The pump cover 102 has an outlet located on its side, used to discharge the pressurized fluid. The lower part of the pump cover 102 is designated as a water inlet area, with the water inlet axially facing the inside of the pump cavity, providing a channel for fluid to enter the pump cavity.

[0030] like Figure 1 , 2 As shown, to ensure normal water intake of the submersible pump and prevent bottom siltation from clogging the inlet, a filter screen 116 is provided in the water inlet area at the bottom of the pump cover 102. The filter screen 116 can perform preliminary filtration of large particulate impurities in the fluid. The pump cover 102 is also provided with a downwardly extending support part 103, which forms a stable support structure. When the submersible pump is placed at the bottom of the water, pool, or in sludge, the support part 103 can lift the pump body 101 off the bottom surface, preventing bottom silt and sediment from directly clogging the filter screen 116, ensuring smooth water intake, and improving the submersible pump's continuous working ability under harsh conditions.

[0031] Traditional submersible pumps typically use flanges and bolts to fasten the pump body and cover. Over long-term use, these bolts are prone to corrosion and jamming. If foreign objects such as fibers or stones enter the pump chamber and cause blockage, disassembly and maintenance become extremely difficult and inefficient. Therefore, this embodiment employs a quick-disassembly structure, as detailed below: An axial elastic preload is provided between the pump cover 102 and the pump body 101. This preload provides stable axial elastic force after the pump cover 102 and pump body 101 are assembled, ensuring a reliable sealing fit between them while also allowing for a certain degree of relative axial movement. The pump cover 102 and pump body 101 are detachably connected via a snap-fit ​​structure, which axially locks the pump cover 102 in a closed position. Under the axial elastic force provided by the preload, the snap-fit ​​structure remains in a locked and tensioned state, preventing axial movement and circumferential rotation between the pump cover 102 and pump body 101, thus ensuring the sealing performance and structural stability of the pump chamber under operating pressure.

[0032] like Figure 2 As shown, one optional form of the axial elastic preload member includes an annular sealing ring 106, multiple springs 110, and a support ring 111. The annular sealing ring 106 has a waisted structure, with one end fixedly connected to the pump body 101 and the other end movably fitted to the inner wall of the pump cover 102, forming an interference fit with the inner wall of the pump cover 102 to ensure an initial sealing effect.

[0033] Multiple springs 110 are evenly arranged circumferentially, with one end of each spring 110 connected to the pump body 101 and the other end connected to the support ring 111. During assembly, as the pump cover 102 is inserted into the pump body 101, the pump cover 102 compresses each spring 110 through the support ring 111, causing the springs 110 to be compressed and generate axial elastic force. The resultant force of all springs 110 continuously acts on the pump cover 102 through the support ring 111, providing a stable axial elastic force to the pump cover 102, ensuring that the pump cover 102 and the pump body 101 always have a tendency to separate axially, thereby ensuring that the snap-fit ​​structure remains in a locked and tensioned state.

[0034] When the internal pressure of the pump chamber increases, the annular sealing ring 106 expands outward under the action of internal pressure, thereby further tightening the fitting gap between the pump cover 102 and the pump body 101, realizing adaptive pressure sealing and improving the sealing reliability under high pressure conditions.

[0035] like Figure 1 , 5 As shown in Figure 6, one optional form of the snap-fit ​​structure includes a hook 104 and a groove 105 that cooperate with each other. The hook 104 is disposed on the pump cover 102 and extends axially toward the pump body 101. The groove 105 is correspondingly disposed on the pump body 101 and is adapted to the position and shape of the hook 104. During assembly, the hook 104 is inserted axially into the groove 105. When the hook 104 is inserted into place, the pump cover 102 and the pump body 101 rotate relative to each other, thereby locking the hook 104 and the groove 105 together, realizing the quick assembly of the pump cover 102 and the pump body 101.

[0036] like Figure 6 As shown, to further prevent the pump cover 102 from circumferentially loosening during operation, the hook 104 and the groove 105 are engaged with toothed surfaces. Under the continuous axial elastic force provided by the axial elastic preload, the toothed surfaces of the hook 104 and the groove 105 press and mesh with each other, forming a circumferential limit, thereby reliably preventing the pump cover 102 from rotating unexpectedly relative to the pump body 101, and ensuring that the buckle structure can still maintain reliable locking under vibration and other working conditions.

[0037] With the above structure, this embodiment achieves sealing and locking while eliminating the traditional flange bolt connection, enabling quick assembly and disassembly of the pump cover 102 and the pump body 101. This facilitates quick opening and cleaning when foreign objects enter the pump chamber, solving the problems of difficult disassembly due to rust and inconvenient maintenance in traditional structures. It is particularly suitable for submersible pumps operating under harsh conditions such as sewage pumps and impurity pumps.

[0038] Example 2: Based on Example 1, such as Figure 2 , 3 As shown in Figure 4, an annular boss 108 is fixedly installed on the pump body 101 by countersunk bolts. Multiple stepped holes 109 are evenly distributed circumferentially on the body of the annular boss 108, and guide rods 107 are slidably connected within the stepped holes 109. One end of the guide rod 107 has a flange. The flanged end of the guide rod 107 is inserted into the stepped hole 109 from the inside of the annular boss 108. The flange engages with the stepped surface of the stepped hole 109, thus constraining the guide rod 107 within the stepped hole 109, preventing it from dislodging and allowing it to slide axially along the stepped hole 109.

[0039] Each guide rod 107 is fitted with a spring 110. One end of the spring 110 abuts against the annular boss 108, and the other end abuts against the support ring 111. The support ring 111 is connected to the end of the guide rod 107 away from the flange by a countersunk bolt. Specifically, the end of the guide rod 107 has a corresponding internal threaded hole. The countersunk bolt passes through the support ring 111 and is threaded into the internal threaded hole of the guide rod 107 to achieve a fixed connection between the support ring 111 and the guide rod 107. After assembly, the spring 110 is in a pre-compressed state between the annular boss 108 and the support ring 111, which can stably provide axial elastic force to the support ring 111.

[0040] During use, the guide rod 107 axially guides and constrains the movement of the support ring 111. During the relative rotation of the pump cover 102 and the pump body 101 to achieve a snap-locking action, the support ring 111 can only move smoothly along the axial direction, without circumferential deflection or radial offset, ensuring stable and reliable transmission of the elastic preload. Simultaneously, the raised structure of the annular boss 108 reduces the assembly gap between the pump cover 102 and the pump body 101, further ensuring the sealing effect and connection stability between them.

[0041] The annular sealing ring 106 is clamped at the pump body 101 by the annular boss 108 to achieve a stable connection between the annular sealing ring 106 and the pump body 101.

[0042] In this embodiment, as Figure 3 As shown, in order to prevent external contaminants from entering the stepped hole of the annular boss 108 through the assembly gap and causing obstruction of the axial elastic preload, a gasket 113 is also provided between the pump body 101 and the pump cover 102. The gasket 113 is arranged in a ring between the snap-fit ​​structure and the axial elastic preload. The gasket 113 is made of flexible rubber material, and its purpose is to block external contaminants. It does not bear pressure during use.

[0043] Example 3: Based on Example 1 or 2, such as Figure 3 As shown, a guide slope is provided on the inner wall of the insertion end of the pump cover 102 and the annular gasket. This guide slope is used to guide and center the end of the annular sealing ring 106 during the assembly of the pump cover 102 and the pump body 101, so that the annular sealing ring 106 can smoothly and accurately enter the mating position of the pump cover 102 along the guide slope. This avoids the annular sealing ring 106 from rolling, wrinkling or being squeezed and deformed due to eccentricity or misalignment during assembly, ensuring the integrity of the sealing structure of the annular sealing ring 106, and improving the smoothness and reliability of the assembly.

[0044] Example 4: Based on any of the embodiments 1-3, such as Figure 3 As shown, a protective shell 112 is also provided on the outer side wall of the pump cover 102. After assembly, the annular sealing ring 106 is wrapped and placed in the space between the pump cover body and the protective shell 112. The protective shell 112 can shield and block hard or flexible foreign objects such as sand and fibers entrained in the fluid, preventing foreign objects from directly impacting or scratching the annular sealing ring 106, thereby effectively preventing the annular sealing ring 106 from being damaged, deformed or failed due to the impact of foreign objects, and improving the working stability and service life of the sealing structure.

[0045] Example 5: Based on any of the embodiments in Examples 1-4, such as Figure 7As shown, to further facilitate the assembly and disassembly of the pump cover 102 and the pump body 101, a fitting gap is provided between both sides of the hook 104 and the corresponding slot 105, which allows external tools to be inserted. The tool can be a common tool such as a pry bar 114.

[0046] During assembly, inserting the pry bar 114 into the mating gap and prying it causes the pump cover 102 and pump body 101 to rotate relative to each other, thereby allowing the hook 104 to smoothly engage with the slot 105. During disassembly and maintenance, inserting the pry bar 114 into the mating gap on the other side and prying it in the opposite direction allows the hook 104 to disengage from the slot 105, enabling the pump cover 102 to be quickly separated from the pump body 101.

[0047] The above-described embodiments are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A quick-assembly and disassembly structure for a submersible pump body cavity, comprising a pump body (101) and a pump cover (102), wherein the space formed by the pump cover (102) and the pump body (101) forms a pump cavity, characterized in that: An axial elastic preload is provided between the pump cover (102) and the pump body (101). The axial elastic preload is used to form an axial elastic force after the pump cover (102) and the pump body (101) are assembled, and to keep the pump cover (102) and the pump body (101) in a sealed fit. The pump cover (102) and the pump body (101) are detachably connected by a snap-fit ​​structure, which is used to axially lock the pump cover (102) in the closed position; The axial elastic force generated by the axial elastic preload acts on the snap-fit ​​structure, keeping the snap-fit ​​structure in a snap-fit ​​and tensioned state, thereby preventing axial and circumferential relative movement between the pump cover (102) and the pump body (101).

2. The quick-assembly and disassembly structure for the submersible pump body cavity as described in claim 1, characterized in that, The axial elastic preload includes an annular sealing ring (106), multiple springs (110), and a support ring (111). The annular sealing ring (106) has a waisted structure. One end of it is connected to the pump body (101), and the other end is in movable fit with the inner wall of the pump cover (102). When the pressure inside the pump chamber increases, the annular sealing ring (106) expands outward under the pressure to seal the gap between the pump cover (102) and the pump body (101). One end of the spring (110) is connected to the pump body (101), and the other end is connected to the support ring (111). The spring (110) transmits elastic force to the pump cover (102) through the support ring (111).

3. The quick-assembly and disassembly structure for the submersible pump body cavity as described in claim 2, characterized in that, An annular boss (108) is provided at the pump body (101). Multiple stepped holes (109) are provided at the body of the annular boss (108). A guide rod (107) is slidably connected at the stepped hole (109). One end of the guide rod (107) is constrained in the stepped hole (109), and the other end is connected to the support ring (111). A spring (110) is sleeved on the guide rod (107), and both ends abut against the annular boss (108) and the support ring (111) respectively.

4. The quick-assembly and disassembly structure for the submersible pump body cavity as described in claim 2, characterized in that, A gasket (113) is also provided between the pump body (101) and the pump cover (102), and the gasket (113) is arranged in a ring between the snap-fit ​​structure and the axial elastic preload.

5. The quick-assembly and disassembly structure for the submersible pump body cavity as described in claim 2, characterized in that, A guide slope is provided on the inner wall of the insertion end of the pump cover (102) and the annular seal (106).

6. The quick-assembly and disassembly structure for the submersible pump body cavity as described in claim 3, characterized in that, One end of the annular sealing ring (106) is clamped at the pump body (101) by an annular boss (108).

7. The quick-assembly and disassembly structure for the submersible pump body cavity as described in claim 2, characterized in that, A protective shell (112) is also provided on the side wall of the pump cover (102). The protective shell (112) is used to prevent foreign objects in the fluid to be transported from impacting the annular seal ring (106).

8. The quick-assembly and disassembly structure for the submersible pump body cavity as described in claim 1, characterized in that, The buckle structure includes a hook (104) and a slot (105) that cooperate with each other, and the hook (104) can be inserted into the slot (105); When the hook (104) is inserted into the slot (105), the pump cover (102) and the pump body (101) rotate relative to each other so that the hook (104) locks into the slot (105).

9. The quick-assembly and disassembly structure for the submersible pump body cavity as described in claim 8, characterized in that, The hook (104) and the slot (105) are engaged by the toothed surfaces.

10. The quick-assembly and disassembly structure for the submersible pump body cavity as described in claim 9, characterized in that, The two sides of the hook (104) are left with a fitting gap between the hook (105) and the groove (105) for tools to be inserted to achieve relative rotation between the pump cover (102) and the pump body (101).

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