Water pump capable of effectively preventing scale from blocking rotor

Abstract

The utility model discloses a water pump capable of effectively preventing scale from blocking a rotor. A pump shell of a pump body module and an impeller shell of an impeller module are fixedly connected together through a support frame with a plurality of transverse water passing channels in the mode that the pump shell and the impeller shell are independent of each other and are separated by a set distance, and at least one half part, extending out of a rotor cavity in the pump body module, of a rotor shaft in the pump body module is exposed in a space defined by the support frame. And the lower end of the rotor shaft crosses the space and is fixedly connected with an impeller arranged in an impeller cavity of the impeller module. The support frame body is arranged between the rotor module and the impeller module, so that the rotor module is far away from the impeller module, meanwhile, the two sealing rings are arranged between the rotor module and the support frame body, and the gap between the inner wall of the impeller cavity and the impeller blade is set to be larger, so that water scale or solid particles in the water container are difficult to deposit. According to the structure, the rotor in the rotor cavity can be effectively prevented from being blocked by foreign matters (scale or solid particles).

Description

Technical Field

[0001] The utility model relates to a water pump, in particular to a water pump which can prevent scale from blocking a rotor. Background Art

[0002] In the prior art, water pumps immersed in water, especially in hot water containers, usually seal the stator module before placing the entire water pump in the water, and the rotor assembly and the impeller are usually installed in a shell of a conjoined structure with a small spacing between them. Since the rotor assembly and the impeller are placed in water for a long time, the scale generated in the water will enter the rotor chamber through the gap between the rotor shaft and the sleeve. Over time, the accumulation of scale increases, causing the rotor load to increase, and in severe cases, the rotor is stuck by the scale and cannot rotate. Similarly, in order to improve the efficiency of the impeller in pumping water, the space in the impeller chamber of this type of water pump is usually small, that is, the gap between the edge of the impeller blades and the corresponding inner wall of the impeller chamber is also small. Over time, the scale accumulated in the impeller chamber will also cause the impeller to be unable to rotate.

[0003] Note: The formation of scale is mainly due to the precipitation of calcium, magnesium and other minerals in the water during the heating process to form water-insoluble substances. When the water is heated, the calcium and magnesium ions in the water combine with the carbonate ions in the water to form water-insoluble minerals such as calcium carbonate and magnesium carbonate. These minerals will be deposited on the inner wall of the container over time, forming the scale that people see. The main components of scale include calcium carbonate, magnesium carbonate, calcium hydroxide, magnesium hydroxide, calcium chloride, magnesium chloride, etc. The specific gravity of scale formed by these calcium and magnesium compounds is greater than 2.0. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a water pump in which a pump body module placed in a water container is arranged away from an impeller module and can effectively prevent scale from blocking a rotor.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] The utility model discloses a water pump which can effectively prevent scale from jamming the rotor, and is characterized in that a pump casing of a pump body module and an impeller casing of an impeller module are fixed together in an independent and set distance-separated manner through a bracket frame with a plurality of transverse water passages, a rotor shaft in the pump body module extends out of at least half of a rotor chamber in the pump body module and is exposed in a space enclosed by the bracket frame, a lower end of the rotor shaft passes over the space and is fixedly connected to an impeller arranged in the impeller chamber of the impeller module, and a top cover for sealingly assembling a stator assembly in the stator chamber is provided on the top end surface of the pump casing.

[0007] The pump housing is composed of a cylindrical portion and a plurality of column legs for connecting the pump housing to the bracket frame. The longitudinal cross-section of the cylindrical portion is an inverted "concave" shape. The pump body module is composed of a rotor assembly and a stator assembly arranged around the rotor assembly. The stator assembly and the rotor assembly are respectively installed in the stator chamber and the rotor chamber of the pump housing. The top end surface of the stator chamber is open, and its bottom end surface is a closed surface. The top end surface of the rotor chamber is provided with a screw hole, and its bottom end surface is open; a rubber sleeve for closing the top end surface of the rotor chamber is provided at the top of the rotor chamber, and an upper bearing sleeved on the upper end of the rotor shaft is provided in the rubber sleeve, and the rotor sleeved on the rotor shaft is placed in the rotor chamber; a plurality of the column legs are evenly spaced along the periphery of the bottom surface of the cylindrical portion, and the lower ends of the column legs extend downward.

[0008] The column leg is cylindrical, and is provided with two side wings protruding outward and extending downward on its peripheral wall for accurately positioning the pump housing and the support frame in the circumferential direction of the pump housing. The two side wings are symmetrically arranged.

[0009] The support frame is an integrated structure, which consists of an upper base plate and a plurality of limiting cylinders which are spaced apart along the periphery of the upper base plate and extend downward. A shaft seat with a hollow inner cavity is provided in the center of the upper base plate, and the upper end of the shaft seat is embedded in the rotor cavity. The cavity wall of the hollow inner cavity is a step wall. A lower bearing which is sleeved on the rotor shaft is provided on the first step in the hollow inner cavity, and an annular sealing ring which is sleeved on the rotor shaft is provided on the second step in the hollow inner cavity. The lower end of the rotor shaft extends downward through the shaft seat from the upper port and the lower port of the hollow inner cavity in sequence.

[0010] The limiting cylinder has a channel cavity for accommodating the column legs, a long notch penetrating the limiting cylinder is provided on the outer wall of the channel cavity, the inner wall of the channel cavity is a closed side wall, and a clamping side wall for limiting the side wing is provided in the channel cavity.

[0011] The impeller housing is composed of a wheel cavity cover body and a wheel cavity base with separate structures. The wheel cavity cover body is an integrated structure, which is composed of a wheel cavity top plate, a wheel cavity side wall and a water outlet guide body. An axial hole through which the rotor shaft passes is provided in the center of the wheel cavity top plate. The diameter of the axial hole is larger than the diameter of the rotor shaft. The gap therebetween is to allow water in the transverse water passage to smoothly enter the upper water inlet in the impeller chamber. A water outlet communicated with the water outlet guide body is provided on the wheel cavity side wall; positioning holes are provided around the wheel cavity top plate to fix the lower end of the column leg to the wheel cavity cover body.

[0012] The wheel cavity base includes a bottom plate and a base side wall arranged on the bottom plate. The base side wall is a closed annular cylinder extending upward. The annular cylinder is embedded in the wheel cavity side wall and the water outlet guide body, and they are tightly connected. A lower water inlet is provided in the center of the bottom plate to suck water in the water container into the impeller chamber.

[0013] The upper part of the shaft seat is a sleeve part which protrudes upward from the top surface of the upper base plate. The sleeve part is embedded in the rotor chamber, and the outer peripheral wall of the sleeve part is tightly fitted with the cavity wall of the rotor chamber.

[0014] The water outlet guide is a water pipe arranged outside the support frame in a vertical state, and the water outlet end of the water pipe passes upward over the support frame and is placed within the height range of the pump housing.

[0015] A support frame is provided between the rotor module and the impeller module so that the rotor module is away from the impeller module. At the same time, two sealing rings are provided between the rotor module and the support frame and the gap between the inner wall of the impeller chamber and the impeller blades is set larger so that scale or solid particles in the water container are difficult to deposit. During use, due to the rotation of the impeller, the water in the transverse water passage is always in a flowing state, and its flow direction is from top to bottom and is sucked into the impeller chamber from the upper water inlet provided on the impeller chamber. In this way, scale or solid particles with a specific gravity greater than 1.0 in the water enter the impeller chamber under the action of the downward flow force and are discharged by the water outlet guide body, and will not stay at the entrance of the rotor chamber located above the transverse water passage, thereby preventing these substances from penetrating into the rotor chamber from the gap between the outer wall of the rotor shaft and the shaft hole. In addition, with the sealing effect of the two sealing rings, the above structure can effectively prevent the rotor in the rotor chamber from being stuck by foreign matter (scale or solid particles). BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the water pump of the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of the water pump when it is inverted.

[0018] Figure 3 for Figure 1 AA section view.

[0019] Figure 4 for Figure 1 Explosion diagram.

[0020] Figure 5 for Figure 4 Schematic diagram of the exploded view of the cooperation between the pump housing, bracket frame and impeller housing.

[0021] Figure 6 for Figure 5 Schematic diagram from top-down perspective.

[0022] Figure 7 This is only a schematic diagram of the structure of the pump housing.

[0023] The reference numerals are as follows:

[0024] Pump body module 1, pump housing 2, outer cylinder 3, column leg 31, column 32, side wing 33, screw hole 34, top cover 35, control circuit board 36, stator chamber 37, stator assembly 38, inner cylinder 4, assembly and disassembly process hole 41, rotor chamber 42, first sealing ring 43, second sealing ring 44, rotor assembly 5, rubber bushing 51, upper bearing 52, permanent magnet rotor 53, rotor shaft 54, lower bearing 55, bracket frame 6, upper base plate 61, shaft seat 62, notch 63, limit cylinder column 64 、 Side notch 65, clamping angle 66, transverse water passage 67, impeller module 7, impeller housing 71, wheel cavity cover 72, wheel cavity top plate 73, upper water inlet 74, positioning hole 75, wheel cavity side wall 76, wheel cavity base 77, bottom plate 78, base side wall 79, water outlet guide body 8, water pipe 81, lower water inlet 82, impeller 9, water pump 100. DETAILED DESCRIPTION

[0025] like Figure 1-7 As shown, the water pump 100 (hereinafter referred to as water pump 100) of the utility model, which can effectively prevent scale from jamming the rotor, is a water pump 100 used in a water container, and is particularly suitable for use in a water container for heating water and a container with many solid particles in turbid liquid. The water pump 100 can effectively prevent scale generated in hot water and solid particles in liquid from entering the rotor chamber 42 and jamming the rotor.

[0026] The water pump 100 of the present invention is mainly composed of three separately arranged components, namely a pump body module 1, a bracket frame 6 and an impeller module 7, wherein the pump body module 1 and the impeller module 7 are separated by the bracket frame 6, and the distance between them is determined by the height of the bracket frame 6.

[0027] 1. Pump body module 1

[0028] The pump body module 1 includes a pump housing 2 , a stator assembly 38 disposed in the pump housing 2 , a rotor assembly 5 and a control circuit board 36 .

[0029] 1. Pump housing 2

[0030] The pump housing 2 is made of a non-magnetic material, preferably an injection molded part or an aluminum profile, and is an integral structure consisting of a cylindrical portion and a plurality of column legs 31 .

[0031] 1) The cylindrical part is composed of an outer cylinder 3 and an inner cylinder 4 arranged coaxially. The inner cylinder 4 is placed inside the outer cylinder 3. The upper end surface of the inner cylinder 4 is slightly lower than the upper end surface of the outer cylinder 3, and the bottom end surface of the inner cylinder 4 is flush with the bottom end surface of the outer cylinder 3. The top end surface of the inner cylinder 4 is a semi-closed surface with a mounting and disassembly process hole 41, and the bottom end surface of the inner cylinder 4 is open. The upper end surface of the outer cylinder 3 is open, and the surface between the open edge of the bottom end of the inner cylinder 4 and the cylinder wall of the outer cylinder 3 is a closed surface. The longitudinal cross-section of the entire cylindrical part is an inverted "concave" shape, thereby forming two isolated hollow cavities, one of which is an annular interlayer space formed between the cylinder wall of the inner cylinder 4 and the inner wall of the outer cylinder 3, which is hereinafter referred to as the stator chamber 37, and the other is a cylindrical space in the inner cylinder 4, which is hereinafter referred to as the rotor chamber 42.

[0032] The rotor chamber 42 is preferably an upper chamber and a lower chamber with different inner diameters, and the inner diameter of the upper chamber is smaller than that of the lower chamber. A top cover 35 is provided on the opening of the upper end surface of the outer cylinder 3 to seal the stator chamber 37 .

[0033] 2) There are multiple column legs 31, which are arranged on the bottom surface of the cylinder and extend downward. The multiple column legs 31 are arranged at intervals along the circumferential direction of the bottom surface of the cylinder. Each column leg 31 consists of a column part 32 and a side wing 33 that are an integrated structure.

[0034] The cross-sectional shape of the column portion 32 is preferably cylindrical, the upper end of which is connected to the cylindrical portion as a whole, and a screw hole 34 is provided on the bottom end surface thereof. The length of the column portion 32 is substantially the same as the height of the bracket frame 6 .

[0035] The side wings 33 have two pieces, which are respectively arranged on the circumferential outer wall of the column part 32 and extend downward. The two side wings 33 protrude outward and are symmetrically arranged with respect to the axis of the column part 32. The shape of the side wings 33 is preferably wide at the top and narrow at the bottom.

[0036] The function of the column legs 31 is to enable the pump housing 2 and the support frame 6 to be accurately positioned in the circumferential direction of the pump housing 2 when they are assembled together.

[0037] 2. Stator assembly 38

[0038] like Figure 3 , 7 As shown, it includes a coil package, which surrounds the inner cylinder 4 and is assembled in the stator chamber 37. When the stator assembly 38 is energized, it generates a magnetic field that can rotate the rotor in the rotor assembly 5.

[0039] 3. Rotor assembly 5

[0040] like Figure 3 , 7 As shown, it includes an upper bearing 52 , a rotor and a lower bearing 55 , wherein the rotor includes a permanent magnet rotor 53 and a rotor shaft 54 ​​, and the rotor assembly 5 is assembled in the rotor chamber 42 .

[0041] A rubber sleeve 51 is provided in the upper cavity of the rotor chamber 42 , and the upper bearing 52 is disposed in the rubber sleeve 51 and sleeved on the upper end of the rotor shaft 54 ​​.

[0042] Function of the rubber bushing 51: When the upper bearing 52 and the lower bearing 55 are out of alignment due to poor manufacturing precision, the rubber bushing 51 can provide an elastic swing correction space for the upper bearing 52 during the rotation of the rotor shaft 54, and can also seal the assembly and disassembly process hole 41.

[0043] The permanent magnet rotor 53 is sleeved on the rotor shaft 54 ​​and assembled in the lower cavity, and the lower bearing 55 is sleeved on the rotor shaft 54 ​​below the permanent magnet rotor 53 .

[0044] The lower end of the rotor shaft 54 ​​passes downward through the rotor chamber 42 and the support frame 6 in sequence and is fixedly connected to the impeller 9 in the impeller module 7 .

[0045] 4. Control circuit board 36

[0046] like Figure 3 As shown, it is installed in the outer cylinder 3 and placed above the inner cylinder 4, and is electrically connected to the main control circuit of the device through a lead wire passing through the pump housing 2.

[0047] 2. Bracket frame 6

[0048] like Figure 1 , Figure 3-Figure 6 As shown, the support frame 6 is an integrated structure, preferably an injection molded part, which is composed of an upper base plate 61 and a plurality of limiting cylinders 64.

[0049] 1. Upper substrate 61

[0050] It is a special-shaped flat plate, with a plurality of notches 63 arranged at intervals around its periphery, and a limiting cylinder column 64 extending downward is arranged around each notch 63, and the plurality of limiting cylinder columns 64 are arranged at intervals.

[0051] A shaft seat 62 having a hollow inner cavity is provided in the center of the upper base plate 61, and the upper and lower ends of the hollow inner cavity are both open. The upper portion of the shaft seat 62 is a sleeve portion protruding upward from the top surface of the upper base plate 61, and the sleeve portion is embedded in the lower portion of the rotor chamber 42, and the outer peripheral wall of the sleeve portion is tightly fitted with the cavity wall of the rotor chamber 42.

[0052] The cavity wall of the hollow inner cavity is a step wall. A lower bearing 55 sleeved on the rotor shaft 54 ​​is provided on the first step in the hollow inner cavity. An annular sealing ring sleeved on the rotor shaft 54 ​​is provided on the second step in the hollow inner cavity, hereinafter referred to as the first sealing ring 43. The lower end of the rotor shaft 54 ​​extends downward from the upper port and the lower port of the hollow inner cavity in sequence through the shaft seat 62.

[0053] An annular sealing ring is further provided between the upper base plate 61 outside the shaft seat 62 and the bottom end surface of the outer cylinder 3 of the pump housing 2 , hereinafter referred to as the second sealing ring 44 .

[0054] The provision of the two sealing rings can effectively prevent the water in the water container from entering the rotor chamber 42 through the longitudinal gap between the outer wall of the rotor shaft 54 ​​and the shaft hole and the transverse gap between the pump housing 2 and the bracket frame 6 .

[0055] 2. Limiting cylinder 64

[0056] It is a cylindrical column extending downward and having a passage cavity for accommodating the column legs 31. Its upper and lower end surfaces are open, and the passage cavity is surrounded by an outer wall, an inner wall, and two oblique side walls connected between the outer wall and the inner wall.

[0057] A side notch 65 in the shape of a long strip is provided on the outer wall, extending downward and penetrating the limiting cylinder 64. The setting of the side notch 65 can facilitate the assembly of the pump housing 2 on the bracket frame 6 (to achieve visual installation). The inner wall of the channel cavity is a closed side wall, and an acute angle is formed between the outer wall and the hypotenuse side wall, which is hereinafter referred to as the clamping angle 66, and an obtuse angle is formed between the inner wall and the hypotenuse side wall.

[0058] The number and positions of the limiting cylinders 64 correspond to the column legs 31 on the pump housing 2 .

[0059] When the pump housing 2 and the bracket frame 6 are assembled together, the column leg 31 is inserted into the limiting column 64, a portion of the outer peripheral side wall of the column leg 31 is exposed at the side notch 65, and the two side wings 33 on the column leg 31 are respectively clamped in the two clamping angles 66, and the clamping angles 66 limit the side wings 33.

[0060] 3. Horizontal water channel 67

[0061] For the support frame 6, if the upper base plate 61 is compared to the bridge deck of a bridge, then the multiple limiting cylinders are like the multiple piers of the bridge, and the space between two adjacent limiting cylinders is the channel for water to flow through, which is hereinafter referred to as the horizontal water channel 67.

[0062] When the pump housing 2 and the bracket frame 6 are assembled together, most of the rotor shaft 54 ​​extending out of the rotor chamber 42 is exposed in the transverse water passage 67. Preferably, the length of the rotor shaft 54 ​​exposed in the transverse water passage 67 is at least half of the length of the rotor shaft 54 ​​after extending out of the rotor chamber 42 (Note: the lower end of the rotor shaft 54 ​​should extend into the impeller module 7). In this way, a sufficiently large space is left between the rotor chamber 42 and the impeller chamber. This space can provide space for scale or solid particles with a specific gravity greater than 1.0 to sink when the water in the water container is in a static state.

[0063] 3. Impeller module 7

[0064] like Figure 1-Figure 6 As shown, the impeller module 7 includes an impeller housing 71 and an impeller 9 arranged in the impeller housing 71 .

[0065] 1. The impeller housing 71 is composed of a wheel chamber cover 72 and a wheel chamber base 77 of a separate structure.

[0066] 1) The wheel cavity cover 72 is an integrated structure, which is composed of a wheel cavity top plate 73, a wheel cavity side wall 76 and a water outlet guide body 8.

[0067] The wheel cavity top plate 73 is a flat plate, and an axial hole through which the rotor shaft 54 ​​passes is provided in the center of the wheel cavity top plate 73. The diameter of the axial hole is larger than the diameter of the rotor shaft 54, and the gap therebetween is such that the water in the transverse water passage 67 can smoothly enter the upper water inlet 74 in the impeller chamber. Positioning holes 75 are provided around the wheel cavity top plate 73 to fix the lower end of the column leg 31 with the wheel cavity cover 72. That is, bolts are passed through the positioning holes 75 and screwed with the screw holes 34 on the lower end surface of the column leg 31 inserted into the limiting cylinder 64, so that the wheel cavity cover 72, the bracket frame 6 and the pump housing 2 can be accurately docked and fixed together. This precise alignment connection can prevent the rotor shaft 54 ​​from swinging when it rotates.

[0068] The wheel chamber side wall 76 extends downward, and the space enclosed by the wheel chamber side wall 76 is a space for installing the impeller 9.

[0069] The water outlet guide body 8 is a water pipe 81 arranged in a vertical state on the outside of the bracket frame 6. The bottom of the water pipe 81 is connected to the wheel chamber side wall 76 and communicates with each other (that is, the water outlet of the impeller chamber is the water inlet end of the water pipe 81), and its upper end (that is, the water outlet end of the water pipe 81) passes upward over the bracket frame 6 and is placed within the height range of the pump housing 2. This arrangement greatly facilitates the installation of the external water pipe.

[0070] 2) The wheel cavity base 77 includes a bottom plate 78 and a base side wall 79 disposed on the bottom plate 78. The base side wall 79 is a closed annular cylinder extending upward, and the annular cylinder is embedded in the wheel cavity side wall 76 and the water outlet guide body 8, and they are tightly connected.

[0071] The impeller chamber is formed by the impeller chamber side wall 76 and the base side wall 79 .

[0072] A lower water inlet 82 for sucking water from the water container into the impeller chamber is provided in the center of the bottom plate 78 .

[0073] 2. Impeller 9

[0074] It is installed in the impeller chamber and is fixedly connected to the lower end of the rotor shaft 54 ​​passing through the upper water inlet 74. The gap between the blades of the impeller 9 and the inner wall of the impeller chamber is relatively large, and the minimum gap is preferably 1mm-5mm. It can have enough space to accommodate scale and ensure the fluid discharge efficiency, thereby preventing scale or solid particles entering the impeller chamber from being deposited on the inner wall of the impeller chamber.

Claims

1. A water pump that can effectively prevent scale from blocking the rotor, characterized in that: The pump housing (2) of the pump body module (1) and the impeller housing (71) of the impeller module (7) are fixedly connected together in an independent and set distance-separated manner through a bracket frame (6) with a plurality of transverse water passages (67); at least half of the rotor shaft (54) in the pump body module (1) extends out of the rotor chamber (42) in the pump body module (1) and is exposed in the space enclosed by the bracket frame (6); the lower end of the rotor shaft (54) passes through the space and is fixedly connected to the impeller (9) arranged in the impeller chamber of the impeller module (7); and a top cover (35) is provided on the top end surface of the pump housing (2) for sealingly assembling the stator assembly (38) in the stator chamber (37).

2. The water pump capable of effectively preventing scale from blocking the rotor according to claim 1, characterized in that: The pump housing (2) is composed of a cylindrical portion and a plurality of column legs (31) for connecting the pump housing (2) to the support frame (6); the longitudinal cross-section of the cylindrical portion is an inverted "concave" shape; the pump body module (1) is composed of a rotor assembly (5) and a stator assembly (38) arranged around the rotor assembly (5); the stator assembly (38) and the rotor assembly (5) are respectively installed in the stator chamber (37) and the rotor chamber (42) of the pump housing (2); the top end surface of the stator chamber (37) is open, and the bottom end surface thereof is The rotor chamber (42) has a closed surface, a screw hole (34) is provided on the top end surface of the rotor chamber (42), and its bottom end surface is open; a rubber sleeve (51) is provided at the top of the rotor chamber (42) to close the top end surface of the rotor chamber (42), an upper bearing (52) sleeved on the upper end of the rotor shaft (54) is provided in the rubber sleeve (51), and the rotor sleeved on the rotor shaft (54) is placed in the rotor chamber (42); a plurality of column legs (31) are evenly spaced along the periphery of the bottom surface of the cylindrical portion, and the lower ends of the column legs (31) extend downward.

3. The water pump capable of effectively preventing scale from blocking the rotor according to claim 2, characterized in that: The column leg (31) is cylindrical, and has two side wings (33) protruding outward and extending downward on its peripheral wall for accurately positioning the pump housing (2) and the support frame (6) in the circumferential direction of the pump housing (2). The two side wings (33) are symmetrically arranged.

4. The water pump capable of effectively preventing scale from blocking the rotor according to claim 3, characterized in that: The support frame (6) is an integrated structure, which is composed of an upper base plate (61) and a plurality of limiting cylinders (64) arranged at intervals along the periphery of the upper base plate (61) and extending downward. A shaft seat (62) having a hollow inner cavity is provided in the center of the upper base plate (61). The upper end of the shaft seat (62) is embedded in the rotor chamber (42). The cavity wall of the hollow inner cavity is a step wall. A lower bearing (55) sleeved on the rotor shaft (54) is provided on the first step in the hollow inner cavity. An annular sealing ring sleeved on the rotor shaft (54) is provided on the second step in the hollow inner cavity. The lower end of the rotor shaft (54) extends downward through the shaft seat (62) from the upper port and the lower port of the hollow inner cavity in sequence.

5. The water pump capable of effectively preventing scale from blocking the rotor according to claim 4, characterized in that: The limiting cylinder (64) has a channel cavity for accommodating the column leg (31), a long notch penetrating the limiting cylinder (64) is provided on the outer wall of the channel cavity, the inner wall of the channel cavity is a closed side wall, and a clamping side wall for limiting the side wing (33) is provided in the channel cavity.

6. The water pump capable of effectively preventing scale from blocking the rotor according to claim 5, characterized in that: The impeller housing (71) is composed of a wheel cavity cover (72) and a wheel cavity base (77) of a separate structure. The wheel cavity cover (72) is an integrated structure, which is composed of a wheel cavity top plate (73), a wheel cavity side wall (76) and a water outlet guide (8). An axial hole through which the rotor shaft (54) passes is provided in the center of the wheel cavity top plate (73). The diameter of the axial hole is larger than the diameter of the rotor shaft (54). The gap therebetween is to allow water in the transverse water passage (67) to smoothly enter the upper water inlet (74) in the impeller chamber. The wheel cavity side wall (76) is provided with a water outlet that communicates with the water outlet guide (8). Positioning holes (75) are provided around the wheel cavity top plate (73) to fix the lower end of the column leg (31) to the wheel cavity cover (72).

7. The water pump capable of effectively preventing scale from blocking the rotor according to claim 6, characterized in that: The wheel chamber base (77) comprises a bottom plate (78) and a base side wall (79) arranged on the bottom plate (78); the base side wall (79) is a closed annular cylinder extending upward, and the annular cylinder is embedded in the wheel chamber side wall (76) and the water outlet guide body (8), and the two are tightly connected; a lower water inlet (82) for sucking water in a water container into the impeller chamber is provided in the center of the bottom plate (78).

8. The water pump capable of effectively preventing scale from blocking the rotor according to claim 4, characterized in that: The upper portion of the shaft seat (62) is a sleeve portion that protrudes upward from the top surface of the upper base plate (61). The sleeve portion is embedded in the rotor chamber (42), and the outer peripheral wall of the sleeve portion is tightly fitted with the cavity wall of the rotor chamber (42).

9. The water pump capable of effectively preventing scale from blocking the rotor according to claim 7, characterized in that: The water outlet guide (8) is a water pipe (81) arranged in a vertical state outside the support frame (6), and the water outlet end of the water pipe (81) passes upward over the support frame (6) and is placed within the height range of the pump housing (2).

Images