Shield pump body

Abstract

The utility model relates to the technical field of water pumps, in particular to a shield pump body which comprises an upper pump shell and a lower pump shell, the upper pump shell and the lower pump shell are made of stainless steel, the lower pump shell is connected to the upper pump shell, a liquid outlet cavity is formed in the side, away from the lower pump shell, of the upper pump shell, and a liquid outlet channel is formed in the cavity wall of the liquid outlet cavity and communicates with the outside. A liquid inlet cavity is formed in the side, close to the upper pump shell, of the lower pump shell, a liquid inlet channel is formed in the cavity wall of the liquid inlet cavity and communicates with the outside, and a communicating hole is formed in the cavity bottom of the liquid outlet cavity and communicates with the liquid inlet cavity. The pump body of the shield pump is divided into the upper pump shell and the lower pump shell, split casting of the upper pump shell and the lower pump shell is achieved, the upper pump shell and the lower pump shell are made of stainless steel and can be used in a humid or corrosive environment for a long time, the upper pump shell and the lower pump shell which are produced are assembled and welded, and manufacturing of the pump body of the shield pump is achieved. The manufacturing process of the shield pump body is simplified, the production efficiency of the shield pump body is improved, and the service life of the shield pump body is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of water pumps, and in particular to a canned pump body. Background Technology

[0002] The pump body is an indispensable part of the canned motor pump. It mainly serves to support components such as the motor and impeller. It also has inlet and outlet pipes at the connection port for material input and output. In addition, to ensure the efficiency of liquid transportation, several flow channels are usually opened on the inner wall of the pump body to achieve the purpose of ensuring the efficiency of transportation.

[0003] Most existing canned motor pumps are made of cast iron in a single molding process. Cast iron is prone to rusting during use, and this phenomenon is exacerbated by long-term exposure to humid or corrosive environments. Rusting not only affects the appearance of the pump body but may also negatively impact the pump's performance and lifespan.

[0004] The integral casting of cast iron requires multiple processes such as mold preparation, melting, pouring, cooling, and cleaning. The entire casting cycle is relatively long. During the casting process, defects such as porosity, slag inclusions, shrinkage cavities, shrinkage porosity, and cracks exist, which affect the service life and performance of the pump body. Utility Model Content

[0005] In order to improve the production efficiency and service life of the canned motor pump body, this application provides a canned motor pump body.

[0006] The shielded pump body provided in this application adopts the following technical solution:

[0007] A shielded pump body includes an upper pump housing and a lower pump housing, both made of stainless steel. The lower pump housing is connected to the upper pump housing. The upper pump housing has a liquid outlet chamber on the side away from the lower pump housing, and a liquid outlet channel is provided on the wall of the liquid outlet chamber, which is connected to the outside. The lower pump housing has a liquid inlet chamber on the side near the upper pump housing, and a liquid inlet channel is provided on the wall of the liquid inlet chamber, which is connected to the outside. The bottom of the liquid outlet chamber has a connecting hole, which is connected to the liquid inlet chamber.

[0008] By adopting the above technical solution, the canned motor pump body is divided into two parts: an upper pump shell and a lower pump shell. This allows for separate casting of the upper and lower pump shells, reducing the casting difficulty of the canned motor pump body, facilitating precise control of the dimensions of the upper and lower pump shells, and improving the performance of the canned motor pump body. The upper and lower pump shells are made of stainless steel, which has strong corrosion resistance and can be used for a long time in humid or corrosive environments. The completed upper and lower pump shells are then assembled and welded to realize the manufacturing of the canned motor pump body, simplifying the manufacturing process and improving the production efficiency and service life of the canned motor pump body.

[0009] Preferably, it further includes a connecting joint and a connecting plate. The connecting joint is connected to the outer wall of the lower pump housing near the liquid inlet channel and is used for connecting to external pipelines. One side of the connecting plate is connected to the outer wall of the upper pump housing, and the other end of the connecting plate is connected to the side of the connecting joint near the lower pump housing. The connecting plate and the inner wall of the lower pump housing surround each other to form the liquid inlet channel.

[0010] By adopting the above technical solution, the connecting joint is connected to the side of the lower pump housing near the liquid inlet channel. The connecting joint is used to connect with the external pipeline to realize the connection between the canned pump body and the external pipeline. Different models of connecting plates and connecting joints can be selected as needed to meet the connection requirements between the canned pump body and different models of external pipelines, thereby improving the applicability of the canned pump body.

[0011] Preferably, the connecting joint has an annular groove on the side near the lower pump housing, the connecting plate is embedded in the annular groove, the outer wall of the connecting plate is in contact with the groove wall, the lower pump housing is embedded in the annular groove, and the outer wall of the lower pump housing is in contact with the groove wall.

[0012] By adopting the above technical solution, the connecting joint is provided with an annular groove, in which the connecting plate and the lower pump housing are embedded, thereby achieving the initial fixation of the connecting plate, the lower pump housing and the connecting joint, reducing the possibility of relative movement between the connecting plate, the lower pump housing and the connecting joint during the welding process, simplifying the assembly process of the shielded pump body and improving production efficiency and production quality.

[0013] Preferably, a boss is connected to the side of the upper pump housing near the lower pump housing, and the boss is used to be embedded in the liquid inlet chamber.

[0014] By adopting the above technical solution, the boss is embedded in the liquid inlet cavity, which plays a preliminary role in fixing the lower pump housing. This helps to connect the connecting hole with the opening on the side of the lower pump housing near the upper pump housing, which facilitates the assembly and welding of the shielded pump body.

[0015] Preferably, the outer periphery of the end of the boss away from the upper pump housing is provided with a first rounded corner, which is used for the inlet chamber wall to abut.

[0016] By adopting the above technical solution, the first rounded corner is used for the inlet cavity wall to abut, and plays a guiding role in the assembly of the lower pump casing, which facilitates the assembly of the shielded pump body and improves production efficiency.

[0017] Preferably, the upper pump housing has a groove on the side near the lower pump housing, the groove being used for embedding the lower pump housing, and the inner wall of the groove being in contact with the wall of the liquid inlet chamber.

[0018] By adopting the above technical solution, the groove wall is fitted to the inlet chamber wall, thereby achieving relative fixation of the upper and lower pump housings in the horizontal direction. This reduces the possibility of relative movement between the upper and lower pump housings during welding, improves the stability of the canned pump body production, and enhances production efficiency and quality.

[0019] Preferably, a protruding strip is connected to the side of the upper pump housing near the lower pump housing. The protruding strip extends along the length of the groove, and the inner wall of the protruding strip is flush with the outer wall of the groove.

[0020] By adopting the above technical solution, the convex strip increases the connection area between the upper and lower pump housings, improves the stability of the connection between the upper and lower pump housings, enhances the structural strength of the canned pump body, and increases the service life of the canned pump body.

[0021] Preferably, it also includes reinforcing ribs, which are connected to the outer walls of the upper pump housing and the lower pump housing.

[0022] By adopting the above technical solution, the reinforcing ribs are connected to the outer walls of the upper and lower pump casings, which improves the stability of the connection between the upper and lower pump casings, enhances the structural strength of the canned pump body, and extends the service life of the canned pump body.

[0023] Preferably, an indicator mark is provided on the outer wall of the upper pump housing.

[0024] By adopting the above technical solution, the indicator mark can help operators quickly identify the flow direction of the liquid in the pump body, which facilitates quick positioning during subsequent installation and use, and improves the convenience of installing the canned pump body.

[0025] Preferably, the upper pump housing is provided with a plurality of mounting holes for threaded connection with bolts, and the plurality of mounting holes are distributed circumferentially at intervals along the side of the upper pump housing away from the lower pump housing.

[0026] By adopting the above technical solution, several mounting holes are distributed at intervals along the circumference of the upper pump casing, and the mounting plate is used for threaded connection with bolts, which facilitates the installation and fixation of the canned pump body and the drive components.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The canned motor pump body is divided into two parts: the upper pump shell and the lower pump shell. This allows for separate casting of the upper and lower pump shells, reducing the casting difficulty of the canned motor pump body, helping to accurately control the dimensions of the upper and lower pump shells, and improving the performance of the canned motor pump body. The completed upper and lower pump shells are then assembled and welded to realize the manufacturing of the canned motor pump body, simplifying the manufacturing process and improving production efficiency.

[0029] 2. The connecting joint is connected to the side of the lower pump housing near the liquid inlet channel. The connecting joint is used to connect with the external pipeline to realize the connection between the canned pump body and the external pipeline. Different models of connecting plates and connecting joints can be selected as needed to meet the connection requirements between the canned pump body and different models of external pipelines, thereby improving the applicability of the canned pump body.

[0030] 3. The groove wall fits snugly against the inlet chamber wall, achieving relative fixation of the upper and lower pump housings in the horizontal direction. This reduces the possibility of relative movement between the upper and lower pump housings during welding, improves the stability of the canned pump body production, and enhances production efficiency and quality. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a canned motor pump body.

[0032] Figure 2 This is a cross-sectional view of the canned motor pump body, mainly showing the liquid outlet channel.

[0033] Figure 3 This is a cross-sectional view of the canned motor pump body.

[0034] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0035] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Upper pump housing; 11. Discharge chamber; 12. Discharge channel; 13. Connecting hole; 14. Boss; 141. First fillet; 15. Groove; 16. Raised strip; 17. Indicator mark; 18. Ear plate; 181. Mounting hole; 182. Internal thread; 19. Discharge pipe; 191. First external thread; 110. First stepped groove; 111. Second stepped groove; 112. First chamfer; 113. Groove; 114. Second chamfer; 115. Fixing plate;

[0038] 2. Lower pump casing; 21. Inlet chamber; 22. Inlet channel;

[0039] 3. Connecting plate;

[0040] 4. Connecting joint; 41. Annular groove; 42. Second external thread;

[0041] 5. Reinforcing ribs;

[0042] 6. Connecting ring; 61. Outer ring; 62. Inner ring; 63. Positioning ring. Detailed Implementation

[0043] The present application will be further described in detail below with reference to the accompanying drawings.

[0044] The applicant found that the one-piece casting of the canned motor pump body resulted in a long production cycle and low production efficiency. While the applicant improved production efficiency by casting the left and right pump casings separately, it was discovered during production that ensuring the inner walls of the left and right pump casings were flush during welding increased the likelihood of excessive impact on either casing, potentially damaging the pump body. Furthermore, the weld seams between the left and right pump casings were long and difficult to weld, making it challenging to guarantee production efficiency and yield. Therefore, this application adopts an upper and lower pump casing design.

[0045] Reference Figure 1 This application discloses a canned motor pump body including an upper pump housing 1. One end of the upper pump housing 1 along its axial direction has a coaxially arranged liquid outlet chamber 11. A liquid outlet pipe 19 is fixedly connected to the outer wall of the upper pump housing 1 along a side perpendicular to its axial direction. The outer periphery of the end of the liquid outlet pipe 19 away from the upper pump housing 1 has a first external thread 191 for connection to an external pipeline. Two indicator marks 17 are provided on the outer wall of the upper pump housing 1, symmetrically distributed along the direction perpendicular to the axial direction of the liquid outlet pipe 19, facilitating quick identification of the liquid flow direction within the canned motor pump body by the operator. Several ear plates 18 are fixedly connected to the outer periphery of the upper pump housing 1 near the opening of the liquid outlet chamber 11, spaced apart circumferentially along the upper pump housing 1. In this embodiment, four ear plates 18 are provided, evenly distributed circumferentially along the upper pump housing 1. The ear plate 18 is provided with a mounting hole 181, which extends through the ear plate 18 along the axial direction of the upper pump housing 1. The mounting hole 181 is provided with an internal thread 182, which is used for threaded connection with a bolt to realize the installation and fixation of the canned pump body and the drive component.

[0046] Reference Figure 1 and Figure 2 The outlet pipe 19 is provided with an outlet channel 12 at the end away from the upper pump housing 1. The outlet channel 12 is connected to the outlet chamber 11 and is spiral in shape.

[0047] Reference Figure 1 and Figure 3 A first stepped groove 110 is coaxially provided on the cavity wall at the end of the liquid outlet cavity 11 away from the bottom of the cavity 11. A second stepped groove 111 is coaxially provided on the cavity wall at the end of the first stepped groove 110 away from the bottom of the cavity 11. A first chamfer 112 is provided on the cavity wall of the second stepped groove 111 away from the bottom of the cavity 11.

[0048] A canned motor pump body further includes a lower pump housing 2 and a reinforcing rib 5. The lower pump housing 2 is fixedly connected to the side of the upper pump housing 1 away from the outlet cavity 11. The reinforcing rib 5 is connected to the outer walls of the upper pump housing 1 and the lower pump housing 2, and is fixedly connected to the surface of the upper pump housing 1 near the lower pump housing 2. The length direction of the reinforcing rib 5 is parallel to the axial direction of the outlet pipe 19. The two ends of the reinforcing rib 5 along its length direction are respectively fixedly connected to the outer wall of the outlet pipe 19 and the surface of the lower pump housing 2 near the outlet pipe 19, thereby improving the structural strength of the canned motor pump body, enhancing its impact resistance, and increasing its service life. In this embodiment, the lower pump housing 2, the upper pump housing 1, and the reinforcing rib 5 are fixedly connected by welding. The lower pump housing 2 is provided with an inlet cavity 21 on the side near the upper pump housing 1, and a boss 14 is coaxially fixedly connected to the side of the upper pump housing 1 away from the outlet cavity 11. The boss 14 is embedded in the inlet cavity 21. The outer periphery of the boss 14, away from the liquid outlet chamber 11, is provided with a first rounded corner 141 for the liquid inlet chamber 21 wall to abut against. A groove 15 is provided on the surface of the upper pump housing 1 near the lower pump housing 2, for the lower pump housing 2 to be inserted into. The inner wall of the groove 15 fits against the wall of the liquid inlet chamber 21, while a gap exists between the outer wall of the groove 15 and the outer wall of the lower pump housing 2. A protrusion 16 is fixedly connected to the surface of the upper pump housing 1 near the lower pump housing 2. The protrusion 16 extends along the length of the groove 15, and its inner wall is flush with the outer wall of the groove 15. This increases the welding area between the upper pump housing 1 and the lower pump housing 2, improves the stability of the connection between them, and enhances the structural strength of the canned pump body.

[0049] Reference Figure 3 and Figure 4 The pump body of a shielded pump also includes a connecting ring 6. The bottom of the outlet chamber 11 is coaxially provided with a groove 113, and the bottom of the groove 113 is coaxially provided with a connecting hole 13, which is connected to the inlet chamber 21. The connecting ring 6 is coaxially embedded in the groove 113. The connecting ring 6 includes an outer ring portion 61, an inner ring portion 62, and a positioning ring portion 63. The outer wall of the outer ring portion 61 fits against the groove wall of the groove 113. The end of the outer ring portion 61 near the lower pump housing 2 is fixedly connected to the outer periphery of the positioning ring portion 63. The connection between the outer ring portion 61 and the positioning ring portion 63 is an arc transition. The surface of the positioning ring portion 63 near the lower pump housing 2 fits against the bottom of the groove 113. The axis of the inner ring portion 62 coincides with the axis of the outer ring portion 61. The end of the inner ring portion 62 near the lower pump housing 2 is fixedly connected to the inner periphery of the positioning ring portion 63. The connection between the inner ring portion 62 and the positioning ring portion 63 is an arc transition. The inner wall of the inner ring portion 62 is located inside the wall of the connecting hole 13. A second chamfer 114 is provided on the groove wall of the groove 113 away from the lower pump housing 2. The second chamfer 114 is used for the connecting ring 6 to abut.

[0050] Reference Figure 3 and Figure 5The pump body of the shielded pump also includes a connecting plate 3 and a connecting joint 4. An inlet channel 22 is provided on the side of the inlet chamber 21 away from the outlet pipe 19, and the inlet channel 22 is connected to the outside. The connecting joint 4 is fixedly connected to the end of the lower pump housing 2 near the inlet channel 22. An annular groove 41 is provided on the end of the connecting joint 4 near the lower pump housing 2, and the annular groove 41 is connected to the inner side of the connecting joint 4. The end of the lower pump housing 2 away from the outlet pipe 19 is embedded in the annular groove 41, and the outer wall of the lower pump housing 2 is in contact with the groove wall of the annular groove 41. A fixing plate 115 is fixedly connected to the outer wall of the upper pump housing 1 near the connecting joint 4. One end of the connecting plate 3 is fixedly connected to the end of the fixing plate 115 away from the outlet pipe 19, and the other end of the connecting plate 3 is embedded in the annular groove 41, with the outer wall of the connecting plate 3 in contact with the groove wall of the annular groove 41. The connecting plate 3 and the fixing plate 115 are arc-shaped. The two ends of the connecting plate 3 along its axis are in contact with the surface of the lower pump housing 2 near the upper surface. The inner wall of the connecting plate 3 and the inner wall of the lower pump housing 2 surround each other to form an inlet channel 22. The two ends of the fixing plate 115 along its circumference are in contact with the surface of the lower pump housing 2 near the upper surface. The inner wall of the fixing plate 115, the outer wall of the upper pump housing 1 near the lower pump housing 2, and the inner wall of the lower pump housing 2 surround each other to form an inlet cavity 21. A second external thread 42 is provided on the outer wall of the connecting joint 4 for connecting to an external pipeline.

[0051] In this embodiment, the upper pump housing 1, lower pump housing 2, connecting plate 3, connecting joint 4, reinforcing rib 5, and connecting ring 6 are made of stainless steel, which improves the corrosion resistance of the canned pump body and extends its service life in humid or corrosive environments.

[0052] The implementation principle of a shielded pump body in this application embodiment is as follows: the upper pump shell 1, the lower pump shell 2, the reinforcing rib 5, the connecting plate 3, and the connecting joint 4 are cast separately. During assembly, the lower pump shell 2 is slidably connected to the upper pump shell 1, and the wall of the liquid inlet chamber 21 abuts against the first rounded corner 141, so that the protrusion 16 is embedded in the reinforcing rib 5. The lower pump shell 2 is embedded in the groove 15, and the connection between the lower pump shell 2 and the upper pump shell 1 is welded. After welding, the reinforcing rib 5 is connected to the liquid outlet pipe 19, the outer wall of the upper pump shell 1 and the lower pump shell 2, and the connection between the reinforcing rib 5 and the upper pump shell 1 and the lower pump shell 2 is welded.

[0053] One end of the connecting plate 3 is abutted against the fixing plate 115, and the connecting joint 4 is sleeved on the outer periphery of the lower pump housing 2 and the connecting plate 3 to achieve the initial fixation of the connecting plate 3, the lower pump housing 2 and the connecting joint 4. The connection points of the connecting plate 3 and the fixing plate 115 with the connecting plate 3, the lower pump housing 2 and the connecting joint 4 are welded to achieve the production and manufacturing of the canned pump body.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A canned pump body, characterized in that: The system includes an upper pump housing (1) and a lower pump housing (2); both the upper pump housing (1) and the lower pump housing (2) are made of stainless steel; the lower pump housing (2) is connected to the upper pump housing (1); the upper pump housing (1) has an outlet chamber (11) on the side away from the lower pump housing (2); the outlet chamber (11) has an outlet channel (12) on its wall; the outlet channel (12) is connected to the outside; the lower pump housing (2) has an inlet chamber (21) on the side close to the upper pump housing (1); the inlet chamber (21) has an inlet channel (22) on its wall; the inlet channel (22) is connected to the outside; the outlet chamber (11) has a connecting hole (13) at its bottom; the connecting hole (13) is connected to the inlet chamber (21).

2. The canned pump body according to claim 1, characterized in that: It also includes a connecting joint (4) and a connecting plate (3); the connecting joint (4) is connected to the outer wall of the lower pump housing (2) near the liquid inlet channel (22); the connecting joint (4) is used for connecting to external pipelines; one side of the connecting plate (3) is connected to the outer wall of the upper pump housing (1); the other end of the connecting plate (3) is connected to the side of the connecting joint (4) near the lower pump housing (2); the connecting plate (3) and the inner wall of the lower pump housing (2) surround each other to form the liquid inlet channel (22).

3. The canned pump body according to claim 2, characterized in that: The connecting joint (4) has an annular groove (41) on the side near the lower pump housing (2); the connecting plate (3) is embedded in the annular groove (41); the outer wall of the connecting plate (3) is in contact with the groove wall of the annular groove (41); the lower pump housing (2) is embedded in the annular groove (41); the outer wall of the lower pump housing (2) is in contact with the groove wall of the annular groove (41).

4. The canned pump body according to claim 1, characterized in that: The upper pump housing (1) is connected to a boss (14) on the side near the lower pump housing (2); the boss (14) is used to be embedded in the liquid inlet chamber (21).

5. The canned pump body according to claim 4, characterized in that: The boss (14) has a first rounded corner (141) on the outer periphery of the end away from the upper pump housing (1); the first rounded corner (141) is used for the inlet chamber (21) wall to abut.

6. The canned pump body according to claim 1, characterized in that: The upper pump housing (1) is provided with a groove (15) on the side near the lower pump housing (2); the groove (15) is used for the lower pump housing (2) to be embedded; the inner wall of the groove (15) is in contact with the wall of the liquid inlet chamber (21).

7. The canned pump body according to claim 6, characterized in that: The upper pump housing (1) is connected to a protrusion (16) on the side near the lower pump housing (2); the protrusion (16) extends along the length of the groove (15); the inner wall of the protrusion (16) is flush with the outer wall of the groove (15).

8. The canned pump body according to claim 1, characterized in that: It also includes reinforcing ribs (5); the reinforcing ribs (5) are connected to the outer walls of the upper pump housing (1) and the lower pump housing (2).

9. The canned pump body according to claim 1, characterized in that: An indicator mark (17) is provided on the outer wall of the upper pump casing (1).

10. The canned pump body according to claim 1, characterized in that: The upper pump housing (1) is provided with a plurality of mounting holes (181); the mounting holes (181) are used for threaded connection with bolts; the plurality of mounting holes (181) are circumferentially spaced along the side of the upper pump housing (1) away from the lower pump housing (2).

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