Combined structure of multi-stage impeller and casing for submersible pump

Abstract

A combined structure of a multi-stage impeller and a wheel housing for a submersible pump, comprising: a connecting seat having a drainage channel; a shaft rod; an intermediate unit having a wheel housing, an inner guide cover and an impeller, the wheel housing having a middle partition plate, and an upper ring housing and a lower ring eaves respectively extending upward and downward along the periphery of the middle partition plate, the intermediate unit being engaged with the ring eaves of the connecting seat by a rotary fastening structure through its upper ring housing; and a bottom unit having a bottom wheel housing and a bottom impeller, the bottom wheel housing having a bottom plate and a bottom ring housing extending upward along the periphery of the bottom plate, the bottom unit being engaged with the lower ring eaves of the intermediate unit by a rotary fastening structure, and a sealing ring being provided between the bottom ring housing of the bottom unit and the ring foot and being pressed against each other, and a water suction port being further provided on the bottom wheel housing.

Description

Technical Field

[0001] The present invention relates to a pump, and particularly to a combined structure of multi-stage impellers and a wheel housing for a submersible pump. Background Art

[0002] Taiwan Patent No. 456464 discloses a combined fixing structure for a shaft and an impeller. The technology of this case mainly focuses on the simplicity of the components for sleeving and screwing the shaft and the impeller, easy operation during relative locking, and easy disassembly and assembly.

[0003] In this case, multiple wheel housings are stacked together, and an impeller is arranged inside each wheel housing. These wheel housings are tightly pressed all at once by a plurality of fixing bolts (the rightmost part of this case Figure 3 shows a fixing bolt). Although such a pressing method can achieve the effect of fixing multiple wheel housings, however, after being used for a period of time, the assembly tightness between each wheel housing will generate gaps due to the aging or deformation of the components themselves. At this time, liquid leakage is likely to occur, and pressure will be lost due to the gaps, thereby causing the problem of insufficient driving pressure. Summary of the Invention

[0004] The main object of the present invention is to provide a combined structure of multi-stage impellers and a wheel housing for a submersible pump, which can enable each wheel housing to be stacked and connected by its own structure without using fixing bolts for pressing.

[0005] Another object of the present invention is to provide a combined structure of multi-stage impellers and a wheel housing for a submersible pump, in which the shaft rod and the driving shaft of the motor are in a combined relationship, so that the number of wheel housings to be used and the length of the shaft rod can be determined according to the depth to be used.

[0006] To achieve the above object, the present invention provides a combined structure of a multi-stage impeller and a wheel housing for a submersible pump, which is used to assemble on a motor. The combined structure of the multi-stage impeller and the wheel housing for the submersible pump includes: a connecting seat for connecting to the motor. The bottom end of the connecting seat has a cover portion facing downward and a ring eaves extending downward along the periphery of the cover portion. The connecting seat has a shaft hole passing through the cover portion, and the shaft hole is for the driving shaft of the motor to pass through. The connecting seat also has a drainage channel, one end of which opens through the cover portion, and the other end opens on one side of the connecting seat; a shaft rod, one end of which is fixedly connected to one end of the driving shaft and rotates along the long axis of the shaft rod under the drive of the driving shaft; an intermediate unit having a wheel housing, an inner flow guide cover and an impeller. The wheel housing has a middle partition plate, an upper ring housing extending upward along the periphery of the middle partition plate, and a lower ring eaves extending downward along the periphery of the middle partition plate. The middle partition plate has a perforation for the shaft rod to pass through, and the aperture of the perforation is larger than the diameter of the shaft rod, so that there is a predetermined distance between the edge of the perforation and the shaft rod. The inner flow guide cover is located below the middle partition plate and has a cover plate and a plurality of flow guide plates provided on the top surface of the cover plate. The plurality of flow guide plates are connected to a ring foot, so that the ring foot surrounds the periphery of the cover plate and there is a gap between the ring foot and the cover plate. The center of the cover plate has a through hole for the shaft rod to pass through, and the aperture of the through hole is larger than the diameter of the shaft rod, so that there is a predetermined distance between the edge of the through hole and the shaft rod. The impeller is fixedly provided on the shaft rod and is located above the middle partition plate and rotates under the drive of the shaft rod. The upper ring housing of the intermediate unit and the ring eaves of the connecting seat are engaged by a rotary fastening structure, and a sealing ring is provided between the upper ring housing and the connecting seat and is pressed against each other. The sealing ring fills the gap between the upper ring housing and the connecting seat to prevent liquid from passing through; and a bottom unit having a bottom wheel housing and a bottom impeller. The bottom wheel housing has a bottom plate and a bottom ring housing extending upward along the periphery of the bottom plate. The bottom impeller is fixedly provided on the shaft rod and is located above the bottom plate and rotates under the drive of the shaft rod. The bottom ring housing of the bottom unit and the lower ring eaves of the intermediate unit are engaged by a rotary fastening structure, and a sealing ring is provided between the bottom ring housing of the bottom unit and the ring foot and is pressed against each other. The bottom wheel housing is also provided with a water suction port.

[0007] Thus, the present invention can stack and connect the intermediate unit and the bottom unit without using fixing bolts for tightening. In addition, the shaft rod of the present invention and the driving shaft of the motor are in a combined relationship. Therefore, the number of intermediate units to be used and the length of the shaft rod can be determined according to the depth to be used, and the additional intermediate units can be defined as extended intermediate units.

[0008] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention. Description of the Drawings

[0009] Figure 1It is an assembled perspective view of a preferred embodiment of the present invention.

[0010] Figure 2 It is an exploded view of a preferred embodiment of the present invention.

[0011] Figure 3 It is an enlarged view of local components of a preferred embodiment of the present invention, showing the structure of the inner flow guide cover.

[0012] Figure 4 It is another enlarged view of local components of a preferred embodiment of the present invention, showing the three-dimensional state of the wheel housing of the intermediate unit and the bottom surface perspective of the inner flow guide cover.

[0013] Figure 5 It is along Figure 1 the sectional view taken along the section line 5-5 in

[0014] Figure 6 It is along Figure 1 the sectional view taken along the section line 6-6 in

[0015] Figure 7 It is another sectional view schematic diagram of a preferred embodiment of the present invention, showing the state of adding one more extended intermediate unit compared with Figure 5 ...

[0016] Among them, the reference numerals

[0017] 10: The combined structure of the multi-stage impeller and the wheel housing used in the immersion pump

[0018] 11: Connecting seat

[0019] 12: Cover part

[0020] 14: Ring eaves

[0021] 16: Shaft hole

[0022] 18: Drainage channel

[0023] 181: Opening

[0024] 182: Opening

[0025] 19: Rubber sleeve

[0026] 21: Shaft rod

[0027] 31: Intermediate unit

[0028] 32: Wheel housing

[0029] 321: Middle partition

[0030] 322: Perforation

[0031] 323: Upper ring housing

[0032] 324: Lower ring eaves

[0033] 34: Inner flow guide cover

[0034] 341: Cover plate

[0035] 342: Through hole

[0036] 343: Flow guide plate

[0037] 344: Ring foot

[0038] 345: Gap

[0039] 36: Impeller

[0040] 38: Sealing ring

[0041] 41: Bottom unit

[0042] 42: Bottom wheel housing

[0043] 421: Bottom plate

[0044] 422: Water suction port

[0045] 423: Bottom ring housing

[0046] 44: Bottom impeller

[0047] 48: Sealing ring

[0048] 91: Motor 92: Drive shaft

[0049] 921: Groove

[0050] S: Rotating snap structure

[0051] 141: Bump

[0052] 39: Snap groove

[0053] 31’: Extended intermediate unit

[0054] 32’: Wheel housing

[0055] 321’: Middle partition board

[0056] 322’: Perforation

[0057] 323’: Upper ring housing

[0058] 324’: Lower ring eaves

[0059] 34’: Inner flow guide cover

[0060] 342’: Through hole

[0061] 343’: Flow guide plate

[0062] 344’: Ring foot

[0063] 345’: Gap

[0064] 36’: Impeller Detailed implementation manner

[0065] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and efficacy of the present invention, but it is not intended to limit the scope of protection of the appended claims of the present invention.

[0066] As Figures 1 to 7 shown, a combined structure 10 of a multi-stage impeller and a wheel housing for a submersible pump proposed by a preferred embodiment of the present invention is used to be assembled to a motor 91. The combined structure 10 of the multi-stage impeller and the wheel housing for the submersible pump mainly consists of a connecting seat 11, a shaft rod 21, an intermediate unit 31 and a bottom unit 41, wherein:

[0067] The connecting seat 11 is used to connect to the motor 91. The bottom end of the connecting seat 11 has a cover portion 12 facing downwards and a ring eaves 14 extending downwards along the periphery of the cover portion 12. The connecting seat 11 has a shaft hole 16 passing through the cover portion 12. The shaft hole 16 allows the drive shaft 92 of the motor 91 to pass through. The connecting seat 11 also has a drainage channel 18. One end opening 181 of the drainage channel 18 penetrates the cover portion 12, and the other end opening 182 is located on one side of the connecting seat 11. A rubber sleeve 19 is sleeved on the drive shaft 92. The rubber sleeve 19 is located above the shaft hole 16 and covers the shaft hole 16. Thus, when the liquid is driven and gushes upwards from the shaft hole 16, the liquid can be blocked from gushing upwards suddenly, so that the liquid can flow out to the periphery due to being blocked.

[0068] One end of the shaft rod 21 is fixedly connected to one end of the drive shaft 92 and rotates along the long axis of the shaft rod 21 under the drive of the drive shaft 92. In actual implementation, a groove 921 is provided at the bottom end of the drive shaft 92. The shaft rod 21 penetrates into the groove 921 by a certain length at its top end and is tightly fitted to the drive shaft 92. In the known technology, a heat shrink fitting (that is, first heating the drive shaft to make it expand due to heat, and then making the groove larger, and after inserting the shaft rod 21, cooling it to shrink, thus forming a tight fitting relationship) technology can be used for the connection.

[0069] The intermediate unit 31 includes a wheel housing 32, an inner flow guide cover 34, and an impeller 36. The wheel housing 32 has a middle partition plate 321, an upper ring housing 323 extending upward around the middle partition plate 321, and a lower ring eaves 324 extending downward around the middle partition plate 321. The middle partition plate 321 has a perforation 322 for the shaft 21 to pass through, and the aperture of the perforation 322 is larger than the diameter of the shaft 21, so that there is a predetermined distance between the edge of the perforation 322 and the shaft 21. The inner flow guide cover 34 is located below the middle partition plate 321, has a cover plate 341 and a plurality of flow guide plates 343 provided on the top surface of the cover plate 341, and the plurality of flow guide plates 343 are connected to a ring foot 344, so that the ring foot 344 surrounds the cover plate 341 and there is a gap 345 between the ring foot 344 and the cover plate 341. The center of the cover plate 341 has a through hole 342 for the shaft 21 to pass through, and the aperture of the through hole 342 is larger than the diameter of the shaft 21, so that there is a predetermined distance between the edge of the through hole 342 and the shaft 21. The impeller 36 is fixed on the shaft 21 and is located above the middle partition plate 321, and is driven by the shaft 21 to rotate. The intermediate unit 31 is engaged with the ring eaves 14 of the connection seat 11 through a rotary fastening structure S by its upper ring housing 323, and a sealing ring 38 is provided between the upper ring housing 323 and the connection seat 11 and is pressed against each other. The sealing ring 38 fills the gap 345 between the upper ring housing 323 and the connection seat 11 to prevent liquid from passing through.

[0070] In this embodiment, the rotary fastening structure S has a plurality of convex blocks 141 protruding inwardly provided on one of the upper ring housing 323 and the ring eaves 14, and a plurality of fastening grooves 39 are provided on the outer wall of the other. The plurality of convex blocks 141 are used to enter the plurality of fastening grooves 39 to form a rotary fastening state. In practice, the plurality of fastening grooves 39 are provided with an inlet, an inclined section for tightening, and a horizontal section for maintaining a fixed state. This structure is directly understandable by those skilled in the art, so it will not be described in detail herein. In addition, the plurality of flow guide plates 343 can be arranged in a form extending in an arc shape toward the center, so as to guide the liquid to flow toward the center to generate a swirling effect.

[0071] In this embodiment, an extended intermediate unit 31' is additionally provided. The structure of the extended intermediate unit 31' is the same as that of the intermediate unit 31, and it has a wheel housing 32', an inner guide cover 34', and an impeller 36'. The upper ring housing 323' of the extended intermediate unit 31' is joined to the lower ring eaves 324 of the intermediate unit 31 by a rotary fastening structure S, and a sealing ring 38 is also provided therebetween. Since the structures and the arrangement relationships of the wheel housing 32', the inner guide cover 34', and the impeller 36' of the extended intermediate unit 31' are the same as those of the wheel housing 32, the inner guide cover 34, and the impeller 36 of the intermediate unit 31, except that they are in an up-and-down stacked relationship in terms of position, the detailed structure thereof will not be elaborated here, and the reference numerals of the corresponding components are all marked with the same reference numeral plus a " ' " for distinction. In fact, multiple extended intermediate units 31' can be added, or none can be added. If multiple extended intermediate units 31' are added, they are stacked on top of each other in pairs. For example Figure 7 As shown, it is the state where two extended intermediate units 31' are added; if none are added, the bottom unit 41' will directly be joined to the intermediate unit 31. Therefore, the up-and-down stacked height of the present invention can be completely determined according to the user's needs. After determining the number of the added extended intermediate units 31', as long as the shaft rod 21 with a corresponding length is selected, correct assembly can be achieved, and there will be no problem of the shaft rod 21 being too long or too short.

[0072] The bottom unit 41 has a bottom wheel housing 42 and a bottom impeller 44. The bottom wheel housing 42 has a bottom plate 421 and a bottom ring housing 423 extending upward around the bottom plate 421. The bottom impeller 44 is fixed to the shaft rod 21 and is located above the bottom plate 421, and is driven by the shaft rod 21 to rotate. The bottom unit 41 is joined to the lower ring eaves 324' of the extended intermediate unit 31' by a rotary fastening structure S, and a sealing ring 48 is provided between the bottom ring housing 423 of the bottom unit 41 and the ring foot 344' of the extended intermediate unit 31' and is pressed against each other. In addition, the bottom wheel housing 42 also has a water suction port 422.

[0073] The above has described the architecture of this embodiment. Next, the operating state of this embodiment will be described.

[0074] As Figure 5 and Figure 6As shown, in this case, water is used as an example of the liquid, but water is not shown in the figure to avoid making the figure too cluttered and difficult to identify. When pumping water, at least the water suction port 422 of the bottom unit 41 of the present invention and the bottom impeller 44 should be placed below the water surface, and water will enter the bottom wheel housing 42 from the water suction port 422. After driving the motor 91, the drive shaft 92 drives the shaft rod 21 to rotate, and then drives the impellers 36' of the intermediate unit 31 and the extended intermediate unit 31' and the bottom impeller 44 to rotate, thereby driving the water in the bottom wheel housing 42 to move around. The water will be forced to move upward and pass through the gap 345' and the through hole 342' of the inner diversion cover 34' of the extended intermediate unit 31', and be located above the inner diversion cover 34'. Then, guided by the plurality of diversion plates 343', it converges towards the center, and then enters the intermediate unit 31 upward through the perforation 322' of the middle partition plate 321' of the extended intermediate unit 31'. The water is then driven by the impeller 36 of the intermediate unit 31 and moves upward in the same manner to below the cover portion 12, and then is discharged from the opening 181 of the drainage channel 18 located in the cover portion 12 to the other end opening 182.

[0075] If the driving force is too large, water may also overflow upward through the shaft hole 16. At this time, the water will be blocked by the rubber sleeve 19 and will not splash upward onto the motor 91, but will flow outward.

[0076] From the above description, it can be seen that there is basically an intermediate unit 31 between the connection seat 11 and the bottom unit 41 in the present invention. However, when the length needs to be increased, one or more extended intermediate units 31' can be added. After determining the number of extended intermediate units 31', a shaft rod 21 of the corresponding length can be selected, thereby completing the finished product required by the user. During assembly, the intermediate unit 31, each extended intermediate unit 31', and the bottom unit 41 are all combined by means of rotational snap connection. Thus, the present invention can achieve the following effects:

[0077] First, the present invention can enable the intermediate unit 31, each extended intermediate unit 31', and the bottom unit 41 to be rotationally snap-connected to each other, that is, to be stacked and connected by their own structures, without the need to use fixing bolts for tightening as in the prior art.

[0078] Second, the shaft rod 21 and the drive shaft 92 of the present invention are in a combined relationship. The producer can determine how many extended intermediate units 31' are needed according to the use depth required by the user, and select a shaft rod 21 of a suitable length after determining the number of extended intermediate units 31'. In this way, in terms of length variation, the producer only needs to stock extended intermediate units 31' and shaft rods 21 of different lengths to meet various different length requirements, thereby reducing the inventory pressure on the producer.

[0079] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention. However, these corresponding changes and modifications should fall within the protection scope of the appended claims of the present invention.

Claims

1. A combined structure of a multi-stage impeller and a wheel housing for a submersible pump, which is used to be assembled to a motor, and is characterized in that, The combined structure of the multi-stage impeller and the wheel housing for the immersion pump includes: A connecting seat for connecting to the motor. The bottom end of the connecting seat has a cover portion facing downward and a ring eaves extending downward along the periphery of the cover portion. The connecting seat has a shaft hole penetrating through the cover portion for the driving shaft of the motor to pass through. The connecting seat also has a drainage channel, one end of which opens through the cover portion, and the other end opens on one side of the connecting seat. A shaft rod, with one end fixedly connected to one end of the driving shaft, and driven by the driving shaft to rotate along the long axis of the shaft rod. An intermediate unit having a wheel housing, an inner guide cover, and an impeller. The wheel housing has a middle partition board, an upper ring housing extending upward along the periphery of the middle partition board, and a lower ring eaves extending downward along the periphery of the middle partition board. The middle partition board has a perforation for the shaft rod to pass through, and the diameter of the perforation is larger than the diameter of the shaft rod, so that there is a predetermined distance between the edge of the perforation and the shaft rod. The inner guide cover is located below the middle partition board, has a cover plate and a plurality of guide plates provided on the top surface of the cover plate. The plurality of guide plates are connected to a ring foot, so that the ring foot surrounds the periphery of the cover plate and there is a gap between the ring foot and the cover plate. The center of the cover plate has a through hole for the shaft rod to pass through, and the diameter of the through hole is larger than the diameter of the shaft rod, so that there is a predetermined distance between the edge of the through hole and the shaft rod. The impeller is fixedly arranged on the shaft rod and is located above the middle partition board, and is driven by the shaft rod to rotate. The upper ring housing of the intermediate unit and the ring eaves of the connecting seat are joined by a rotary fastening structure, and a sealing ring is provided between the upper ring housing and the connecting seat and is pressed against each other. The sealing ring fills the gap between the upper ring housing and the connecting seat to prevent liquid from passing through; and A bottom unit having a bottom wheel housing and a bottom impeller. The bottom wheel housing has a bottom plate and a bottom ring housing extending upward along the periphery of the bottom plate. The bottom impeller is fixedly arranged on the shaft rod and is located above the bottom plate, and is driven by the shaft rod to rotate. The bottom unit is joined by the bottom ring housing and the lower ring eaves by a rotary fastening structure, and a sealing ring is provided between the bottom ring housing of the bottom unit and the ring foot and is pressed against each other. The bottom wheel housing is also provided with a water suction port.

2. The combined structure of the multi-stage impeller and the wheel housing used in the immersion pump according to claim 1, characterized in that, It further includes more than one extended intermediate unit arranged between the intermediate unit and the bottom unit. The structure of the more than one extended intermediate unit is the same as that of the intermediate unit, and has a wheel housing, an inner guide cover, and an impeller, and its upper ring housing is joined to the lower ring eaves of the intermediate unit by a rotary fastening structure. The bottom unit is joined by its bottom ring housing to the lower ring eaves of the more than one extended intermediate unit by the rotary fastening structure.

3. The combined structure of the multi-stage impeller and the wheel housing used in the immersion pump according to claim 1, characterized in that, The rotary fastening structure between the upper ring housing of the intermediate unit and the ring eaves of the connecting seat is that one of the upper ring housing and the ring eaves is provided with a plurality of inwardly protruding bumps, and the outer wall of the other is provided with a plurality of fastening grooves for the plurality of bumps to enter.

4. The combined structure of the multi-stage impeller and the wheel housing used in the submersible pump according to claim 1, characterized in that, A rubber sleeve is sleeved on the driving shaft, and the rubber sleeve is located above the shaft hole and covers the shaft hole.

5. The combined structure of the multi-stage impeller and the wheel housing used in the immersion pump according to claim 1, characterized in that, The bottom end of the driving shaft has a groove, and the shaft rod penetrates into the groove by a predetermined length with its top end and is tightly fitted to the driving shaft.

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