Small plastic inner device submersible deep well pump

Abstract

The utility model provides a kind of small-sized plastic inner device submersible deep well pump, belong to submersible deep well pump technical field.It solves the problem of more inconvenient assembly and insufficient assembly accuracy in prior art.The utility model includes outer pump shell, inner casing, press-out chamber, water suction chamber, motor assembly and impeller assembly, press-out chamber is installed on the outer pump shell upper end, inner casing is installed in the chamber inside the outer pump shell, motor assembly includes rotor, stator, capacitor and motor shaft and motor assembly is installed inside inner casing, upper end cover is fixedly connected on the upper end of inner casing, upper end cover is formed with upper connecting ring and lower connecting ring, lower connecting ring extends into inner casing and connecting ring outer wall and inner casing inner wall closely adhere, upper connecting ring extends into press-out chamber inside, support body and cable connecting column are formed in the inside of upper connecting ring.The utility model has the advantages of higher integration, convenient assembly and high assembly accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of deep well pump technology and relates to a small plastic internal device submersible deep well pump. Background Technology

[0002] Small submersible deep well pumps are lightweight pumping devices suitable for small-diameter deep wells. They are small in size, light in weight, and easy to install and transport. They must be fully submerged in deep well water to operate and cannot run dry. They can extract groundwater from depths of several meters to tens of meters.

[0003] Chinese patent publication number CN208966634U discloses a submersible deep well pump, including a pump casing and a drive motor disposed at the bottom of the pump casing. The drive motor has a motor shaft extending into the pump casing. A pump shaft connected to the motor shaft is disposed inside the pump casing. Several impeller assemblies are connected to the pump shaft and arranged along the length of the pump casing. An inlet is provided at the connection between the pump casing and the drive motor. An outlet is provided at the top of the pump casing. A valve assembly is disposed between the outlet and the impeller assembly at the tail end. The valve assembly includes a valve body and a movable plug disposed in the valve body. The upper end of the valve body has an inwardly bent edge, and an outlet opening is formed between the edges. A limit strip is provided on the inner wall of the valve body. The movable plug is cylindrical. The top of the movable plug has a laterally extended end for abutting against the retaining edge on the edge. Several mating pins that cooperate with the limit strip are provided at its lower end.

[0004] The patent provides a submersible deep well pump in which the valve body and the movable plug of the valve assembly are designed separately, and multiple steps such as pin alignment and edge locking need to be completed in sequence, which makes it impossible to achieve rapid assembly. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a small plastic internal device submersible deep well pump.

[0006] The objective of this utility model can be achieved through the following technical solution: A small plastic internal device submersible deep well pump includes an outer pump casing, an inner casing, a discharge chamber, a suction chamber, a motor assembly, and an impeller assembly. The discharge chamber is installed on the upper end of the outer pump casing, and the inner casing is installed in a cavity inside the outer pump casing. The motor assembly includes a rotor, a stator, a capacitor, and a motor shaft, and the motor assembly is installed inside the inner casing. An upper end cover is fixedly connected to the upper end of the inner casing. The upper end cover forms an upper connecting ring and a lower connecting ring. The lower connecting ring extends into the inner casing, and the outer wall of the connecting ring is tightly fitted with the inner wall of the inner casing. The upper connecting ring extends into the discharge chamber, and the inner side of the upper connecting ring forms... The device includes a support body and a cable connecting post. The cable connecting post has a cable through hole, through which a cable assembly is connected. The cable assembly includes a cable body and a cable sheath. The cable sheath is fitted over the cable body, and an extension protrusion is formed at the outer end of the cable sheath. The extension protrusion is attached to the upper end of the cable connecting post and fixed by bolts. A bolt fixing seat is formed at the center of the upper end cover. A stud bolt is fixed through the bolt fixing seat. A sealing gasket is fixed at the connection between the stud bolt and the bolt fixing seat. An upper bracket and a lower bracket are fixedly installed in the inner housing. The capacitor is installed inside the upper bracket, and the outer end of the lower bracket is connected to the impeller assembly.

[0007] In the aforementioned small plastic internal device submersible deep well pump, the lower end of the outer pump casing is formed with a threaded structure, and the end of the suction chamber is formed with an inner connecting ring. The inner connecting ring extends into the lower end of the outer pump casing to connect the suction chamber with the outer pump casing.

[0008] In the aforementioned small plastic internal device submersible deep well pump, the inner ends of the upper support and the lower support are respectively formed with an upper bearing seat and a lower bearing seat, and a first bearing and a second bearing are respectively installed in the upper bearing seat and the lower bearing seat. One end of the motor shaft is connected to the first bearing and the other end of the motor shaft passes through the second bearing.

[0009] In the aforementioned small plastic internal device submersible deep well pump, a sealing connecting column is formed at the center of the lower support. The sealing connecting column has a first sealing mounting groove and a second sealing mounting groove. A mechanical seal is installed in the first sealing mounting groove, and a skeleton oil seal is installed in the second sealing mounting groove. The motor shaft passes through the skeleton oil seal and the mechanical seal in sequence.

[0010] In the aforementioned small plastic internal device submersible deep well pump, the impeller assembly is installed inside the outer pump casing and includes several guide shells and guide impellers, with a support frame connected to the outermost end of the impeller assembly.

[0011] In the aforementioned small plastic internal device submersible deep well pump, a first sealing groove and a second sealing groove are respectively provided in the outer wall of the upper end cover and the lower support, and a first sealing ring and a second sealing ring are respectively installed in the first sealing groove and the second sealing groove.

[0012] In the aforementioned small plastic internal device submersible deep well pump, a flat pad is installed at the upper end of the support body.

[0013] Compared with the prior art, the small plastic internal device submersible deep well pump provided by this utility model has the following beneficial effects: 1. The upper end cover achieves a tight connection with the discharge chamber and inner shell simultaneously through its self-formed upper and lower connecting rings, without the need for additional connecting parts; at the same time, its built-in bolt fixing seat can directly pass through the column head bolt, and form a seal with the sealing gasket, reducing the number of parts and reducing assembly errors; 2. The lower support has an integrally formed sealing connecting column at the center, and has preset first and second sealing installation grooves, which can directly embed mechanical seals and skeleton oil seals, integrating the shaft seal installation carrier with the support body, avoiding the risk of loosening caused by separate fixing of sealing components, making the double seal more reliable, and simplifying the assembly process of the sealing structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the upper end cap structure; Figure 3 This is a schematic diagram of the lower support structure.

[0015] In the diagram: 1. Outer pump casing; 110. Threaded structure; 2. Inner casing; 3. Discharge chamber; 4. Suction chamber; 41. Inner connecting ring; 5. Motor assembly; 51. Rotor; 52. Stator; 53. Capacitor; 54. Motor shaft; 6. Impeller assembly; 61. Guide shell; 62. Guide impeller; 7. Upper end cover; 71. Upper connecting ring; 72. Lower connecting ring; 73. Support body; 74. Cable connection post; 741. Cable through hole; 75. Bolt fixing seat; 751. Column head bolt; 752. Sealing gasket; 76. 8. Sealing groove; 9. Cable assembly; 10. Cable body; 11. Cable sheath; 12. Extension protrusion; 13. Upper bracket; 14. Upper bearing seat; 15. First bearing; 16. Lower bracket; 17. Lower bearing seat; 18. Second bearing; 19. Sealing connection column; 10. First sealing mounting groove; 10. Second sealing mounting groove; 10. Second sealing groove; 11. Mechanical seal; 12. Skeleton oil seal; 13. Support frame; 14. First sealing ring; 15. Second sealing ring; 16. Flat gasket. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 3 As shown, this embodiment includes an outer pump housing 1, an inner housing 2, a discharge chamber 3, a suction chamber 4, a motor assembly 5, and an impeller assembly 6. The discharge chamber 3 is installed on the upper end of the outer pump housing 1 by a snap-fit, serving as an output channel for water flow. The inner housing 2 is adapted to be installed in the cavity inside the outer pump housing 1, forming an independent installation space for the motor assembly 5, effectively isolating external water bodies.

[0018] like Figures 1 to 2 As shown, the motor assembly 5 includes a rotor 51, a stator 52, a capacitor 53, and a motor shaft 54, which are integrated and installed inside the inner housing 2. An upper end cover 7 is fixedly connected to the upper end of the inner housing 2. The upper end cover 7 is integrally formed with an upper connecting ring 71 and a lower connecting ring 72. The lower connecting ring 72 extends vertically into the inner housing 2, and the outer wall of the lower connecting ring 72 is tightly fitted with the inner wall of the inner housing 2 to achieve sealing and positioning of the upper end of the inner housing 2. The upper connecting ring 71 extends into the pressure chamber 3 to ensure the sealing of the connection between the pressure chamber 3 and the inner housing 2 and prevent water leakage.

[0019] like Figures 1 to 2 As shown, a support body 73 and a cable connecting post 74 are integrally formed on the inner side of the upper connecting ring 71. The support body 73 serves to strengthen the structure. A cable through hole 741 is provided in the cable connecting post 74 along the axial direction. A cable assembly 8 is inserted and fixed in the cable through hole 741. The cable assembly 8 includes a cable body 81 and a cable sheath 82. The cable sheath 82 is tightly fitted outside the cable body 81 to protect the cable body 81. An extension protrusion 821 is integrally formed on the outer end of the cable sheath 82. After the extension protrusion 821 is attached to the upper end face of the cable connecting post 74, it is fixed by bolts, which not only ensures the stability of the cable installation, but also further improves the sealing of the cable through hole 741.

[0020] like Figures 1 to 2 As shown, a bolt fixing seat 75 is integrally formed at the center of the upper end cover 7. A stud bolt 751 is inserted and tightened along the axial direction in the bolt fixing seat 75. The stud bolt 751 can be used to connect other internal components of the pump body. A sealing gasket 752 is sleeved and fixed at the connection between the stud bolt 751 and the bolt fixing seat 75. Through the elastic compression of the sealing gasket 752, water seepage is prevented at this point, ensuring a dry operating environment for the motor assembly 5. An upper bracket 9 and a lower bracket 10 are fixedly installed inside the inner shell 2. The capacitor 53 is fixedly installed inside the upper bracket 9, realizing the neat layout and protection of the capacitor 53. The outer end of the lower bracket 10 is connected to the impeller assembly 6 by bolts or bushings, providing stable support for the impeller assembly 6.

[0021] To elaborate further, such as Figure 1 As shown, the lower end of the outer pump housing 1 is integrally formed into a threaded structure 110, and the end of the suction chamber 4 is integrally formed with an inner connecting ring 41. The inner wall of the inner connecting ring 41 is provided with an internal thread that is adapted to the threaded structure 110. By screwing the inner connecting ring 41 into the thread of the threaded structure 110, the suction chamber 4 is firmly connected to the lower end of the outer pump housing 1. It is easy to disassemble and assemble and has excellent sealing performance, ensuring that there is no air or water leakage during the water suction process.

[0022] To elaborate further, such as Figure 1 and Figure 3 As shown, the inner end of the upper bracket 9 is integrally formed with an upper bearing seat 91, and the inner end of the lower bracket 10 is integrally formed with a lower bearing seat 101. The upper bearing seat 91 is interference-fitted with a first bearing 92, and the lower bearing seat 101 is interference-fitted with a second bearing 102. The upper end of the motor shaft 54 ​​is tightly fitted with the inner ring of the first bearing 92, and the lower end of the motor shaft 54 ​​is coaxially passed through the inner ring of the second bearing 102. Through the double support of the first bearing 92 and the second bearing 102, the coaxiality and stability of the motor shaft 54 ​​during high-speed rotation are ensured, and the operating noise and component wear are reduced.

[0023] To elaborate further, such as Figure 1 and Figure 3 As shown, a sealing connecting column 103 is integrally formed at the center of the lower bracket 10. A first sealing mounting groove 104 and a second sealing mounting groove 105 are sequentially formed along the axial direction in the sealing connecting column 103. A mechanical seal 11 is adapted to be installed in the first sealing mounting groove 104, and a skeleton oil seal 12 is adapted to be installed in the second sealing mounting groove 105. The motor shaft 54 ​​passes through the skeleton oil seal 12 and the mechanical seal 11 sequentially from bottom to top. The skeleton oil seal 12 can initially block external water from entering the motor area, while the mechanical seal 11 forms a secondary sealing barrier. The double sealing structure greatly improves the sealing reliability, effectively protects the motor assembly 5 from water corrosion, and extends the service life of the pump body.

[0024] like Figure 1 As shown, the impeller assembly 6 is installed in the lower area inside the outer pump casing 1. The impeller assembly 6 includes several guide shells 61 and guide impellers 62. The guide shells 61 and guide impellers 62 are arranged alternately and stacked, and fixed in series by bolts to form a multi-stage pressurization structure, which improves the head and water output efficiency of the deep well pump. The bottom of the impeller assembly 6 is connected to a support frame 13 by bolts. The support frame 13 not only limits and protects the impeller assembly 6, but also prevents impurities from entering the interior of the impeller assembly 6, ensuring the normal operation of the impeller.

[0025] To elaborate further, such as Figure 1 and Figure 2As shown, a first sealing groove 76 is provided circumferentially in the outer wall of the upper end cover 7, and a second sealing groove 106 is provided circumferentially in the outer wall of the lower support 10. A first sealing ring 14 is adapted to be installed in the first sealing groove 76, and a second sealing ring 15 is adapted to be installed in the second sealing groove 106. The first sealing ring 14 achieves the seal at the connection between the upper end cover 7, the inner shell 2, and the discharge chamber 3 by compression. The second sealing ring 15 achieves the seal at the corresponding part by compression between the lower support 10, the inner shell 2, and the outer pump shell 1. The multi-directional sealing design ensures the waterproof and leak-proof performance of the entire pump body.

[0026] To elaborate further, such as Figure 2 As shown, a flat pad 16 is installed on the upper surface of the support body 73 by adhesive or bolts. The flat pad 16 is made of wear-resistant and corrosion-resistant plastic or metal. The flat pad 16 can distribute pressure, reduce the wear of the support body 73, and prevent loosening when the parts are connected, thereby improving the stability of the overall structure.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0028] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A small plastic internal device submersible deep well pump, comprising an outer pump housing (1), an inner housing (2), a discharge chamber (3), a suction chamber (4), a motor assembly (5), and an impeller assembly (6), wherein the discharge chamber (3) is installed on the upper end of the outer pump housing (1), the inner housing (2) is installed in a cavity inside the outer pump housing (1), and the motor assembly (5) comprises a rotor (51), a stator (52), a capacitor (53), and a motor shaft (54), and the motor assembly (5) is installed inside the inner housing (2), characterized in that: The upper end of the inner shell (2) is fixedly connected to an upper end cover (7). The upper end cover (7) forms an upper connecting ring (71) and a lower connecting ring (72). The lower connecting ring (72) extends into the inner shell (2) and the outer wall of the connecting ring is tightly fitted with the inner wall of the inner shell (2). The upper connecting ring (71) extends into the inside of the pressing chamber (3). A support body (73) and a cable connecting post (74) are formed on the inner side of the upper connecting ring (71). A cable through hole (741) is opened in the cable connecting post (74). A cable assembly (8) is connected in the cable through hole (741). The cable assembly (8) includes a cable body (81) and a cable sheath (82). The cable sheath (82) 2) An extension protrusion (821) is formed on the outer end of the cable body (81) and the cable sheath (82) is fitted on the outside. The extension protrusion (821) is attached to the upper end of the cable connecting post (74) and fixed by bolts. A bolt fixing seat (75) is formed at the center of the upper end cover (7). A stud bolt (751) is fixed in the bolt fixing seat (75). A sealing gasket (752) is fixed at the connection between the stud bolt (751) and the bolt fixing seat (75). An upper bracket (9) and a lower bracket (10) are fixedly installed in the inner shell (2). The capacitor (53) is installed inside the upper bracket (9). The outer end of the lower bracket (10) is connected to the impeller assembly (6).

2. The small plastic internal device submersible deep well pump according to claim 1, characterized in that: The lower end of the outer pump housing (1) is formed with a threaded structure (110), and the end of the water suction chamber (4) is formed with an inner connecting ring (41). The inner connecting ring (41) extends into the lower end of the outer pump housing (1) to connect the water suction chamber (4) with the outer pump housing (1).

3. The small plastic internal device submersible deep well pump according to claim 1, characterized in that: The upper support (9) and the lower support (10) have an upper bearing seat (91) and a lower bearing seat (101) respectively formed on their inner ends. A first bearing (92) and a second bearing (102) are respectively installed in the upper bearing seat (91) and the lower bearing seat (101). One end of the motor shaft (54) is connected to the first bearing (92) and the other end of the motor shaft (54) passes through the second bearing (102).

4. A small plastic internal device submersible deep well pump according to claim 1, characterized in that: A sealing connecting column (103) is formed at the center of the lower bracket (10). A first sealing mounting groove (104) and a second sealing mounting groove (105) are provided in the sealing connecting column (103). A mechanical seal (11) is installed in the first sealing mounting groove (104), and a skeleton oil seal (12) is installed in the second sealing mounting groove (105). The motor shaft (54) passes through the skeleton oil seal (12) and the mechanical seal (11) in sequence.

5. A small plastic internal device submersible deep well pump according to claim 1, characterized in that: The impeller assembly (6) is installed inside the outer pump housing (1) and includes several guide shells (61) and guide impellers (62). The outermost end of the impeller assembly (6) is connected to a support frame (13).

6. A small plastic internal device submersible deep well pump according to claim 1, characterized in that: The upper end cover (7) and the lower bracket (10) are respectively provided with a first sealing groove (76) and a second sealing groove (106), and a first sealing ring (14) and a second sealing ring (15) are respectively installed in the first sealing groove (76) and the second sealing groove (106).

7. A small plastic internal device submersible deep well pump according to claim 1, characterized in that: A flat pad (16) is installed on the upper end of the support (73).

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