Shielded centrifugal booster pump that effectively increases pump water volume

Abstract

This utility model relates to a shielded centrifugal booster pump that effectively increases the pump's water volume. It includes a lower casing, which has an inlet channel, an inlet chamber, a water passage, an outlet chamber, and an outlet channel arranged sequentially and connected along the water flow direction. The outlet chamber has an outlet on its peripheral wall that communicates with the outlet channel. The inlet chamber includes an upper chamber and a lower chamber, arranged horizontally. The upper chamber has an inlet on its peripheral wall that communicates with the inlet channel. The lower chamber is located below the outlet chamber and the upper chamber, and faces both chambers. The water passage penetrates the bottom wall of the outlet chamber. The large area of ​​the inlet chamber allows for a larger volume of water entering the lower casing, thus increasing the pump's water intake.

Description

Technical Field

[0001] This utility model relates to the field of shielded pump technology, specifically to a shielded centrifugal booster pump that effectively increases the pump's water volume. Background Technology

[0002] A canned motor pump is a device that uses a high-speed rotating impeller to increase the pressure of a liquid by applying energy through centrifugal force. For example, the Chinese utility model patent "Canned Booster Pump with Smoother Impeller Rotation" (patent application number CN201921712032.9, publication number CN210769355U) discloses a lower casing 1 with a water outlet chamber 14, an inlet channel 11, an outlet channel 12, and a water passage 13 connecting the inlet channel 11 and the outlet channel 12. The water passage 13 is located at the bottom of the water outlet chamber 14. A flow channel 15, which is in fluid communication with the outlet channel 12, is circumferentially formed on the peripheral wall of the water outlet chamber 14. The water outlet chamber 14 is also in fluid communication with the inlet channel 11 through the water passage 13. Thus, water enters from the inlet channel 11 and finally flows out from the outlet channel 12.

[0003] From the patent Figure 3 As can be seen, the water inlet cavity between the water inlet channel 11 and the water passage 13 is straight, and the diameter of the water inlet cavity is smaller than the diameter of the water inlet channel 11. This results in a smaller area of ​​the water inlet cavity, which will affect the pumping volume of the canned pump. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a shielded centrifugal booster pump that can effectively increase the pumping capacity, based on the current state of the technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a shielded centrifugal booster pump that effectively increases the pump water volume includes a lower shell, wherein the lower shell has an inlet channel, an inlet chamber, a water passage hole, an outlet chamber and an outlet channel that are arranged and connected in sequence along the water flow direction;

[0006] The water outlet chamber is characterized in that it has an outlet on its peripheral wall that communicates with the water outlet channel, the water inlet chamber includes an upper chamber and a lower chamber, the upper chamber and the water outlet chamber are arranged sequentially in the horizontal direction, the upper chamber has an inlet on its peripheral wall that communicates with the water inlet channel, the lower chamber is located below the water outlet chamber and the upper chamber, and the lower chamber faces the water outlet chamber and the upper chamber, and the water passage hole penetrates the bottom wall of the water outlet chamber.

[0007] To facilitate the installation of a water inlet channel, water inlet cavity, water passage hole, water outlet cavity, and water outlet channel in the lower shell, the lower shell includes a shell and a cover plate. The shell has a water inlet channel, a water outlet channel, a water outlet cavity, and an open inner cavity at the bottom. The cover plate covers the open inner cavity, and the cover plate and the shell are connected by a first connecting member. The cover plate and the inner cavity of the shell together form the water inlet cavity. In this way, the water inlet channel, water outlet channel, water outlet cavity, and open inner cavity at the bottom are first installed on the shell, and then the cover plate is put on to form the water inlet cavity.

[0008] To prevent water leakage between the cover plate and the housing, the cover plate includes a horizontally extending plate and a vertically extending annular body from the upper surface of the plate. The plate abuts against the bottom wall of the housing and the two are connected by the first connector. The annular body is located in the inner cavity of the housing. A step is provided at the top of the outer wall of the annular body. A limiting surface is provided on the wall of the inner cavity of the housing. The horizontal surface of the step is located below the limiting surface, and the vertical surface of the step is located inside the wall of the inner cavity. A sealing ring is provided between the step and the limiting surface. The sealing ring serves to seal between the cover plate and the housing to prevent water leakage.

[0009] Preferably, the first connector is a screw, which is inexpensive and readily available, and the deformation of the sealing ring can be adjusted by adjusting the connection depth of the screw, thereby adjusting the sealing performance between the housing and the cover plate.

[0010] In the above scheme, the shielded centrifugal booster pump also includes an upper shell, a shielding sleeve, a fixed shaft, and an impeller. The upper shell is located at the top of the water outlet cavity of the lower shell. The shielding sleeve is located in the upper shell. A bracket is provided in the water passage hole. The upper end of the fixed shaft is connected to the shielding sleeve, and the lower end of the fixed shaft is connected to the bracket. The impeller includes an impeller shaft and impeller blades. The impeller shaft is sleeved on the fixed shaft, and the impeller blades are located in the water outlet cavity.

[0011] The support can have various structural forms. Preferably, the support includes a pillar whose axis coincides with the axis of the water passage hole, and multiple connecting ribs connecting the pillar and the inner wall of the water passage hole. The multiple connecting ribs are arranged radially around the pillar. The pillar is located above the water passage hole, and each of the connecting ribs has a downward arched arc structure. The arc structure design allows water to flow smoothly through the water passage hole. Otherwise, if there are sharp corners on the support, the water flow impact can easily cause damage and affect the pumping performance of the water pump.

[0012] In the above scheme, the impeller blade includes an upper plate and a lower plate arranged at intervals, and multiple blades disposed between the upper plate and the lower plate. The upper plate is provided with a through hole for the support to pass through, and the lower plate is provided with a through hole facing the water passage hole. The multiple blades are arranged in a radiating pattern with the through hole as the center, and each blade extends circumferentially along the through hole.

[0013] To facilitate the placement of blades between the upper and lower plates, the bottom of the blade is formed on the lower plate, and the top of the blade has a limiting rib extending along its length. The upper plate has a spiral groove into which the limiting rib is correspondingly embedded. The top of the blade and the upper plate are constrained together by a limiting post and a limiting groove, with the limiting post extending vertically. This allows the blade to be formed on the lower plate first, then the limiting rib to be embedded in the groove, and the limiting post to be inserted into the limiting groove, thus achieving the impeller blade assembly, which is simple to operate.

[0014] In the above scheme, to facilitate the assembly of the upper and lower shells, the upper and lower shells are constrained together by inserts and slots. The slots extend vertically, and with the inserts inserted into the slots, the upper and lower shells are connected by a second connector. First, the upper and lower shells are pre-positioned by the cooperation of the inserts and slots, and then the upper and lower shells are connected by the second connector, ensuring a secure assembly.

[0015] Compared with the prior art, the advantages of this utility model are: the water inlet chamber of this utility model includes an upper chamber and a lower chamber, while the prior art is equivalent to only having an upper chamber. The water inlet chamber of this utility model is expanded to include a lower chamber, so the water inlet chamber area is larger, resulting in a larger amount of water entering the lower shell and increasing the water intake of the shielded pump. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 A sectional view;

[0018] Figure 3 for Figure 2 Enlarged view of point A;

[0019] Figure 4 for Figure 2 Enlarged view of point B;

[0020] Figure 5 for Figure 1 A schematic diagram of the lower shell structure;

[0021] Figure 6 for Figure 2 An exploded view of the impeller;

[0022] Figure 7 for Figure 2 An exploded view of the impeller from another direction. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that, unless otherwise stated, "multiple" means two or more, and the terms "upper," "lower," "left," "right," "top," "bottom," "front," "rear," etc., indicate the orientation or positional relationship based on the direction or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In the description of this utility model patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an adhesive connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model patent based on the specific circumstances.

[0026] like Figures 1-7 As shown, the shielded centrifugal booster pump for effectively increasing pump water volume in this preferred embodiment includes a lower shell 1, an upper shell 2, a shielding sleeve 21, a fixed shaft 22, and an impeller 3. The lower shell 1 has an inlet channel 11, an inlet chamber 12, a water passage hole 13, an outlet chamber 14, and an outlet channel 15 arranged and connected sequentially along the water flow direction. The upper shell 2 is located at the top of the outlet chamber 14 of the lower shell 1. The shielding sleeve 21 is located in the upper shell 2. A bracket 4 is provided in the water passage hole 13. The upper end of the fixed shaft 22 is connected to the shielding sleeve 21, and the lower end of the fixed shaft 22 is connected to the bracket 4. The impeller 3 includes an impeller shaft 31 and impeller blades 32. The impeller shaft 31 is sleeved on the fixed shaft 22, and the impeller blades 32 are located in the outlet chamber 14.

[0027] The above are existing technologies and will not be elaborated further here.

[0028] In this embodiment, as Figure 2As shown, the peripheral wall of the outlet chamber 14 is provided with an outlet 141 that communicates with the outlet channel 15. The inlet chamber 12 includes an upper chamber 121 and a lower chamber 122. The upper chamber 121 and the outlet chamber 14 are arranged sequentially in the horizontal direction. The peripheral wall of the upper chamber 121 is provided with an inlet 123 that communicates with the inlet channel 11. The lower chamber 122 is located below the outlet chamber 14 and the upper chamber 121, and the lower chamber 122 faces the outlet chamber 14 and the upper chamber 121. The water passage 13 penetrates the bottom wall of the outlet chamber 14. The prior art is equivalent to only having an upper chamber 121. In this embodiment, the inlet chamber 12 is expanded by adding a lower chamber 122, so the area of ​​the inlet chamber 12 is larger, resulting in a larger amount of water entering the lower shell 1, thereby increasing the water intake of the shielded pump.

[0029] To facilitate the installation of a water inlet channel 11, a water inlet cavity 12, a water passage 13, a water outlet cavity 14, and a water outlet channel 15 in the lower shell 1, the lower shell 1 includes a shell 16 and a cover plate 17. The shell 16 is provided with a water inlet channel 11, a water outlet channel 15, a water outlet cavity 14, and an open inner cavity 160 at the bottom. The cover plate 17 covers the open part of the inner cavity 160, and the cover plate 17 and the shell 16 are connected by a first connecting member. The cover plate 17 and the inner cavity 160 of the shell 16 together form the water inlet cavity 12. Thus, the water inlet channel 11, the water outlet channel 15, the water outlet cavity 14, and the open inner cavity 160 at the bottom are first installed on the shell 16, and then the cover plate 17 is placed on top to form the water inlet cavity 12.

[0030] The cover plate 17 includes a horizontally extending plate 171 and an annular body 172 extending vertically from the upper surface of the plate 171. The plate 171 abuts against the bottom wall of the housing 16 and the two are connected by a first connector. The annular body 172 is located in the inner cavity 160 of the housing 16.

[0031] like Figure 4 As shown, a step 173 is provided at the top of the outer wall of the annular body 172, and a limiting surface 161 is provided on the wall of the inner cavity 160 of the housing 16. The horizontal surface 174 of the step 173 is located below the limiting surface 161, and the vertical surface 175 of the step 173 is located inside the wall of the inner cavity 160. A sealing ring is provided between the step 173 and the limiting surface 161. Figure 4 At part number a, the sealing ring serves to seal between the cover plate 17 and the housing 16 to prevent water leakage.

[0032] In this embodiment, the first connector is a screw. Screws are inexpensive and readily available, and the deformation of the sealing ring can be adjusted by adjusting the connection depth of the screw, thereby adjusting the sealing performance between the housing 16 and the cover plate 17.

[0033] In this embodiment, as Figure 2 , 5As shown, the support 4 includes a support column 41 whose axis coincides with the axis of the water passage hole 13, and multiple connecting ribs 42 connecting the support column 41 and the inner wall of the water passage hole 13. The multiple connecting ribs 42 are arranged radially with the support column 41 as the center. The support column 41 is located above the water passage hole 13. Each connecting rib 42 has a downward arched arc structure. The arc structure design allows water to flow smoothly through the water passage hole 13. Otherwise, if there are sharp corners on the support 4, the water flow impact can easily cause damage and affect the pumping performance of the water pump.

[0034] In this embodiment, as Figure 2 , 6 As shown in Figure 7, the impeller blade 32 includes an upper plate 33 and a lower plate 34 arranged at intervals, and multiple blades 35 disposed between the upper plate 33 and the lower plate 34. The upper plate 33 is provided with a through hole 331 for the support 4 to pass through, and the lower plate 34 is provided with a through hole 341 facing the water passage hole 13. The multiple blades 35 are arranged in a radiating pattern with the through hole 341 as the center, and each blade 35 extends circumferentially along the through hole 341.

[0035] The bottom of the blade 35 is formed on the lower plate 34, and the top of the blade 35 is provided with a limiting rib 351 extending along its length. The upper plate 33 is provided with a spiral groove 332 for the limiting rib 351 to be embedded in. The top of the blade 35 and the upper plate 33 are constrained together by a limiting post 352 and a limiting groove 333. The limiting post 352 extends vertically. It can be that the limiting post 352 is set on the blade 35 and the limiting groove 333 is set on the upper plate 33, or the limiting post 352 is set on the upper plate 33 and the limiting groove 333 is set on the blade 35. In this way, the blade 35 can be formed on the lower plate 34 first, and then the limiting rib 351 can be embedded in the groove 332 and the limiting post 352 can be inserted into the limiting groove 333, thus realizing the conversion of the impeller blade 32. The operation is simple.

[0036] like Figure 3 As shown, the upper shell 2 and the lower shell 1 are constrained together by the insert 10 and the slot 23. The slot 23 extends vertically. With the insert 10 inserted into the slot 23, the upper shell 2 and the lower shell 1 are connected by a second connector, which can be a screw. First, the upper shell 2 and the lower shell 1 are pre-positioned by the cooperation of the insert 10 and the slot 23, and then the upper shell 2 and the lower shell 1 are connected by the second connector, so that the upper shell 2 and the lower shell 1 are firmly assembled.

[0037] Alternatively, the insert 10 can be installed on the upper shell 2 and the slot 23 can be installed on the housing 16 of the lower shell 1, or the insert 10 can be installed on the housing 16 of the lower shell 1 and the slot 23 can be installed on the upper shell 2.

Claims

1. A shielded centrifugal booster pump that effectively increases the pump water volume, comprising a lower shell (1), wherein the lower shell (1) has an inlet channel (11), an inlet chamber (12), a water passage (13), an outlet chamber (14), and an outlet channel (15) arranged sequentially and connected along the water flow direction; characterized in that The peripheral wall of the water outlet chamber (14) is provided with an outlet (141) that communicates with the water outlet channel (15). The water inlet chamber (12) includes an upper chamber (121) and a lower chamber (122). The upper chamber (121) and the water outlet chamber (14) are arranged in sequence along the horizontal direction. The peripheral wall of the upper chamber (121) is provided with an inlet (123) that communicates with the water inlet channel (11). The lower chamber (122) is located below the water outlet chamber (14) and the upper chamber (121), and the lower chamber (122) faces the water outlet chamber (14) and the upper chamber (121). The water passage hole (13) penetrates the bottom wall of the water outlet chamber (14).

2. The canned centrifugal booster pump according to claim 1, characterized in that: The lower shell (1) includes a shell (16) and a cover plate (17). The shell (16) is provided with a water inlet channel (11), a water outlet channel (15), a water outlet cavity (14), and an inner cavity (160) with an open bottom. The cover plate (17) covers the open part of the inner cavity (160), and the cover plate (17) and the shell (16) are connected by a first connector. The cover plate (17) and the inner cavity (160) of the shell (16) together form the water inlet cavity (12).

3. The canned centrifugal booster pump according to claim 2, characterized in that: The cover plate (17) includes a horizontally extending plate (171) and a vertically extending annular body (172) from the upper surface of the plate (171). The plate (171) abuts against the bottom wall of the shell (16) and the two are connected by the first connector. The annular body (172) is located in the inner cavity (160) of the shell (16). A step (173) is provided on the top of the outer wall of the annular body (172). A limiting surface (161) is provided on the wall of the inner cavity (160) of the shell (16). The horizontal surface (174) of the step (173) is located below the limiting surface (161). The vertical surface (175) of the step (173) is located inside the wall of the inner cavity (160). A sealing ring is provided between the step (173) and the limiting surface (161).

4. The canned centrifugal booster pump according to claim 3, characterized in that: The first connecting component is a screw.

5. The canned centrifugal booster pump according to any one of claims 1 to 4, characterized in that: It also includes an upper shell (2), a shielding sleeve (21), a fixed shaft (22) and an impeller (3). The upper shell (2) is located at the top of the water outlet cavity (14) of the lower shell (1). The shielding sleeve (21) is located in the upper shell (2). A bracket (4) is provided in the water passage hole (13). The upper end of the fixed shaft (22) is connected to the shielding sleeve (21), and the lower end of the fixed shaft (22) is connected to the bracket (4). The impeller (3) includes an impeller shaft (31) and an impeller blade (32). The impeller shaft (31) is sleeved on the fixed shaft (22), and the impeller blade (32) is located in the water outlet cavity (14).

6. The canned centrifugal booster pump according to claim 5, characterized in that: The support (4) includes a support column (41) whose axis coincides with the axis of the water passage hole (13) and multiple connecting ribs (42) connecting the support column (41) and the inner wall of the water passage hole (13). The multiple connecting ribs (42) are arranged radially with the support column (41) as the center. The support column (41) is located above the water passage hole (13), and each of the connecting ribs (42) has a downward arched arc structure.

7. The canned centrifugal booster pump according to claim 5, characterized in that: The impeller blade (32) includes an upper plate (33) and a lower plate (34) spaced apart vertically, and multiple blades (35) disposed between the upper plate (33) and the lower plate (34). The upper plate (33) has a through hole (331) for the support (4) to pass through, and the lower plate (34) has a through hole (341) facing the water passage hole (13). The multiple blades (35) are arranged in a radiating pattern with the through hole (341) as the center, and each blade (35) extends circumferentially along the through hole (341).

8. The canned centrifugal booster pump according to claim 7, characterized in that: The bottom of the blade (35) is formed on the lower plate (34), and the top of the blade (35) is provided with a limiting rib (351) extending along its length direction. The upper plate (33) is provided with a spiral groove (332) in which the limiting rib (351) is correspondingly embedded. The top of the blade (35) and the upper plate (33) are constrained together by the limiting post (352) and the limiting groove (333). The limiting post (352) extends vertically.

9. The canned centrifugal booster pump according to claim 5, characterized in that: The upper shell (2) and the lower shell (1) are constrained together by a plug (10) and a slot (23), the slot (23) extending vertically. When the plug (10) is inserted into the slot (23), the upper shell (2) and the lower shell (1) are connected by a second connector.

Images