GB2399395A

GB2399395A - Fluid pump with helical impeller

Info

Publication number: GB2399395A
Application number: GB0305803A
Authority: GB
Inventors: Po Hung Lin
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-03-13
Filing date: 2003-03-13
Publication date: 2004-09-15
Also published as: GB0305803D0; DE20304488U1; GB2399395A9

Abstract

A fluid pump comprises an outer housing, a concentric inner housing 22, a power unit (10 figure 1) and a helical impeller. The helical impeller comprises a conical body and helical vanes, and is attached to a spindle of the power unit. The helical vanes increase in thickness in the direction of flow, such that a helical groove defined between the vanes narrows. A flow passage 24 is defined between the inner and outer housings. The inner and outer housings may be joined by ribs (23 figure 1) which may be integrally formed with the housings. A conical outlet passage 28 may be formed by a casing 27 and an upper cover ( 26 figure 1). The pump may be a submersible pump used in an aquarium or pool, or it may be used as a propelling device for a boat.

Description

SPEED-INCREASING DEVICE DRIVEN BY LIQUID

BACKGROUND OF THE INVENTION

This invention relates to a speed-increasing device driven by liquid, particularly to one provided with a helical device to produce speeding power to liquid to function as a water pump for sending liquid to a high position or as a propeller for moving a floating board or a boat or the like.

lo Generally, a sinking pump is employed to pump the water of an aquarium into a filtering tank for filtering impurities therein, or a waterpumping motor is used to pump water into the water-reserving tank on the top of a high building. The operating principle of either the sinking pump or the water-pumping motor is to employ a motor and a blade or a gear to push water outward by means of a centrifugal force to enable water to produce a speed- increasing force and be easily pushed upward to a high level for use.

However, the conventional centrifugal blades are simply structured so they can hardly produce a great speed increasing force. In this case, the horsepower of a motor has to be increased in order to pump water from a low level to a high level through a long distance, thus increasing :5 cost, making great noise and taking a large space.

SUMMARY OF THE INVENTION

The main purpose of the invention is to offer a speed increasing device driven by liquid mainly utilizing a helical device having helical leaves for forming helical grooves, which spiral narrower and narrower upward so as to - 2 - add speed to water flowing therethrough for sending water to a very high location, functioning as a water pump or a propellers.

Another objective of the invention is to offer a speed- increasing device driven by liquid, in which the housing and the inner tube of a body, and the plural ribs as well as the communicating water passage between the housing and the inner tube are all formed integral, able to reinforce its structure and lower producing cost.

lo BRIEF DESCRIPTION OF DRAWINGS

This invention will be better understood by referring to the accompanying drawings, wherein: Fig. 1 is an exploded perspective view of a speed increasing device driven by liquid in the present invention: Fig. 2 is a cross-sectional view of the speed increasing device driven by liquid, illustrating a condition of water flowing therein in the present invention: Fig. 3 is a rear perspective view of the speed increasing device driven by liquid in the present invention: Figure 4 is a crosssectional view of the first embodiment of a liquid pressing device and flowing direction of water therein in the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A preferred embodiment of a speed-increasing device driven by liquid in the present invention, as shown in Figs. 1 and 2, includes a power unit 10, a body 20, a helical device 30 and a bottom base 40 as main components combined together. l - 3 -

The power unit 10 is a motor in this preferred embodiment, having a spindle 11 extending outward from the lower end.

The body 20 has its housing 21 fitted inside with a concentric inner tube 22. The housing 21 and the inner tube 22 are connected together by means of three ribs 23, having an up-and-down through water passage 24 formed between the housing 21 and the inner tube 22. The housing 21, the inner 22 and the three ribs 23 are all formed lo integral. Further, each rib 23 is provided with an arcuate recess 231 in the bottom, as shown in Fig. 3. The inner tube 22 has a hollow interior for receiving the power unit 10, which has its spindle inserted out of the through hole 222 of the bottom plate 221 of the inner tube 22 and fitted around with a gasket 223. The electric wire 224 of the power unit 10 is inserted through the inner tube 22 and one of the ribs 23 and protrudes out of the housing 21. The inner tube 22 has its upper end provided with female threads 225 to be screwed together with the male threads 261 at the bottom end of an upper cover 26 for closing up the power unit 10, with the upper cover 26 having a cone shaped upper portion. Besides, the housing 21 has its upper end formed with male threads 212 to be screwed together with a fit member 27, which is a tapered conical body having a hollow interior and has a water-exhausting pipe 271 at the front end. A conical water-exhausting passage 28 is formed between the inner surface of the fit member 27 and the outer surface of the upper cover 26 with a preset interval. Further, the body 20 has its bottom end formed with male threads 213.

The helical device 30 has a centre hole 31 to fit around the spindle 11 of the motor 10 from under, and rotates together with the motor 10, and a conical body 32 provided integral with a preset number of helical leaves 33 around its outer annular surface, as shown in Fig. 4. The helical leaves 33 spiral down from an upper end to a lower end, with their thickness gradually becoming larger and larger, and a helical groove 34 formed between every two helical leaves and gradually becoming narrower and narrower. Therefore, when liquid moves up through the helical grooves 34, the liquid may be added in its speed by function of tapering of the helical grooves 34.

The bottom base 40 has its upper end formed with female threads 41 to be screwed together with male threads lo 213 at the bottom of the body 20 and is provided with a central hollow 42 in the centre for receiving the helical device 30 therein. The center hollow 42 is bored at the bottom with a through hole 43 communicating with plural water-sucking holes 44 bored around the periphery of the bottom of the bottom base 40.

In using, as shown in Fig. 2, water is sucked in through the watersucking holes 44 of the bottom base 40 to flow to the helical device 30 via the through hole 43.

Then, the water is pressed by the helical leaves 33 of the helical device 30 to push and rotate the peripheral positions of the helical leaves 33, which simultaneously push the water to flow upward along the up-and-down water through passage 24 of the body 20. After water is guided and gathered together by the conical water-exhausting passage 28 between the fit member 27 and the upper cover 26, it is forced to flow out of the water-exhausting pipe 271 at the front end of the fit member 27.

Further, the conical water-exhausting passage 28 formed between the fit member 27 and the upper cover 26 Jo gathers the flowing-up water to reach the water-exhausting pipe 271 at the front end of the fit member 27 and then speed the water therein by its conical structure to increase a force of water exhausting. - 5 -

The speed-increasing device driven by liquid in the present invention may serve as a pump to be applied to an aquarium or a pool, and with its characteristic of water entering and water exhausting in a same direction, such a speed-increasing device may also serve as a propeller to be applied to a boat or a float.

While the preferred embodiment of the invention has been described above, it will be recognized and understood that various modifications may be made therein and the lo appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention. - 6

Claims

1. A speed-increasing device driven by liquid comprising: a body having a housing, said housing fitted with a concentric inner tube in the interior, an up-and-down through water passage formed between said housing and said inner tube, said inner tube receiving a power unit, said power unit having its spindle inserted through the bottom plate of said inner tube: and lo a helical device positioned at the bottom of said body, said helical device connected axially with said spindle of said power unit, said helical device having a conical body and a preset number of helical leaves extending around said conical body from an upper end to a lower end, said helical leaves having their thickness gradually becoming thinner and thinner downward, a helical groove formed between every two of said helical leaves and gradually becoming narrower and narrower upward.

2. The speed-increasing device driven by liquid as claimed in Claim 1, wherein said housing and said inner tube are connected together by plural ribs positioned therebetween, and all of them are formed integral.

3. The speed-increasing device driven by liquid as claimed in Claim 1, wherein said inner tube has its upper end pivotally combined with an upper cover, and said housing has its upper end pivotally combined with a fit member having a water-exhausting pipe at its front end, and a conical water-exhausting passage is formed between the inner side of said fit member and the outer side of the upper cover with a preset interval.

4. The speed-increasing device driven by liquid as claimed in Claim 1, wherein said conical body and said helical leaves are formed integral.