CN215865362U

CN215865362U - Impeller box structure capable of improving reversal sensitivity

Info

Publication number: CN215865362U
Application number: CN202121093430.4U
Authority: CN
Inventors: 石涛; 陈舜; 唐峰; 谢东; 陈宏�
Original assignee: Fushui Zhilian Technology Co ltd
Current assignee: Fushui Zhilian Technology Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2022-02-18
Anticipated expiration: 2031-05-21

Abstract

The utility model relates to an impeller box structure capable of improving the reversal sensitivity, which comprises an impeller box body, wherein a plurality of water inlet holes are uniformly distributed along the circumferential direction on the circumferential wall of the lower part of the impeller box body, a plurality of water outlets are uniformly distributed along the circumferential direction on the circumferential wall of the upper part of the impeller box body, a trapezoidal flow guide groove is arranged on the circumferential wall of the upper part of the impeller box body beside each water outlet, and the width of one end of the trapezoidal flow guide groove facing the water outlet flow direction is smaller than that of one end of the trapezoidal flow guide groove facing away from the water outlet flow direction. The impeller box capable of improving the reverse sensitivity is reasonable in structural design and novel in structure, and the trapezoidal diversion trench is arranged, so that the stability of reverse fluid is effectively improved, the reverse driving torque of the reverse fluid on the impeller is increased, and the sensitivity of the impeller under the reverse fluid is further improved.

Description

Impeller box structure capable of improving reversal sensitivity

Technical Field

The utility model relates to the field of water meters, in particular to an impeller box structure capable of improving the reversal sensitivity.

Background

The impeller box of current intelligent teletransmission water gauge attaches attention to the backward direction measurement inadequately, and when the reverse flow body is little flow, rivers are less to the drive moment of impeller, lead to the impeller rotational speed slow excessively, seriously influence the accuracy of gathering.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides an impeller box structure with novel structure and strong practicability, which can improve the reverse sensitivity, effectively improve the stability of the reverse fluid, and further improve the sensitivity of the impeller in the reverse fluid.

The utility model is realized by adopting the following scheme: the impeller box structure capable of improving the reversal sensitivity comprises an impeller box body, wherein a plurality of water inlet holes are formed in the peripheral wall of the lower portion of the impeller box body and are uniformly distributed along the circumferential direction, a plurality of water outlets are formed in the peripheral wall of the upper portion of the impeller box body and are uniformly distributed along the circumferential direction, a trapezoidal flow guide groove is formed in the peripheral wall of the upper portion of the impeller box body beside each water outlet, and the width of one end, facing the water flow direction, of each trapezoidal flow guide groove is smaller than the width of one end, facing away from the water flow direction.

Furthermore, the bottom surface of the trapezoidal diversion trench is an inclined surface with the depth gradually becoming deeper from the wider end to the narrower end.

Furthermore, the inclination of the bottom surface of the trapezoidal diversion trench is 13 degrees.

Further, the water inlet hole is inclined relative to the radial direction of the impeller box body, the water outlet hole is inclined relative to the radial direction of the impeller box body, and the inclination directions of the water inlet hole and the water outlet groove are opposite; the two sides of the water outlet are provided with guide plates extending outwards; the periphery of the lower part of the impeller box body is provided with a wedge-shaped flow guide opening positioned at the water inlet hole.

Furthermore, the number of the water inlet holes, the number of the water outlet holes and the number of the trapezoidal diversion trenches are all 4.

Compared with the prior art, the utility model has the following beneficial effects: the impeller box capable of improving the reverse sensitivity has the advantages of novel structure, reasonable design and strong practicability, effectively improves the stability of reverse fluid by arranging the trapezoidal diversion trench, increases the reverse driving torque of the reverse fluid on the impeller, and further improves the sensitivity of the impeller under the reverse fluid.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.

Drawings

FIG. 1 is a top perspective view of an embodiment of the present invention;

FIG. 2 is a bottom perspective view of an embodiment of the present invention;

fig. 3 is a transverse cross-sectional view of the location of the ladder-shaped channels in an embodiment of the present invention;

the reference numbers in the figures illustrate: 100-impeller box body, 110-water inlet hole, 120-water outlet, 130-ladder type diversion trench, 140-diversion plate, 150-wedge diversion opening, and 160-fixed protruding shaft.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 to 3, an impeller box structure capable of improving the sensitivity of reversal rotation includes an impeller box body 100, a plurality of water inlet holes 110 uniformly distributed along the circumferential direction are formed in the circumferential wall of the lower portion of the impeller box body 100, a plurality of water outlet holes 120 uniformly distributed along the circumferential direction are formed in the circumferential wall of the upper portion of the impeller box body, a trapezoidal diversion trench 130 is formed in the circumferential wall of the upper portion of the impeller box body beside each water outlet hole, and the width of one end of the trapezoidal diversion trench 130 facing the direction of the water flow is smaller than the width of one end of the trapezoidal diversion trench 130 facing away from the direction of the water flow; when water flow in the pipeline has counter flow, the fluid flows back to the cavity of the impeller box through the water outlet in a counter flow manner, the trapezoidal diversion trench is a fluid with a wider end facing the counter flow manner, and the fluid flows through the trapezoidal diversion trench with a smaller width, so that the counter flow fluid flows back at the smaller end of the trapezoidal diversion trench to improve the impact force on the impeller, the stability of the counter flow fluid is effectively improved, the counter driving torque of the counter flow fluid on the impeller is increased, and the sensitivity of the impeller under the counter flow fluid (counter flow fluid) is improved.

In this embodiment, the bottom surface of the trapezoidal guide groove 130 is an inclined surface whose depth gradually becomes deeper from the wider end to the narrower end, and the wider end and the narrower end of the trapezoidal guide groove 130 are shallower and deeper, so that the backflow effect of the backflow fluid at the narrower end can be enhanced.

In this embodiment, the inclination of the bottom surface of the trapezoidal diversion trench (i.e. the included angle α between the bottom surface of the trench and the connecting line of the two ends of the trench opening) is 13 °.

In the embodiment, the water inlet hole is inclined relative to the radial direction of the impeller box body, the water outlet hole is inclined relative to the radial direction of the impeller box body, and the inclination directions of the water inlet hole and the water outlet groove are opposite; the two sides of the water outlet are provided with guide plates extending outwards; the periphery of the lower part of the impeller box body is provided with a wedge-shaped flow guide opening positioned in the water inlet hole; the pressure of water entering the inner cavity of the impeller box from the water inlet hole is increased under the action of the wedge-shaped diversion port with the small inner part and the large outer part, the flow speed of the water entering the cavity is improved, and the impact force of the water flow on the impeller is improved; the water entering from the water inlet hole can be attached to the inner wall of the impeller box as much as possible, so that the impact force of the water on the impeller can act on the outer ends of the blades as much as possible, the driving moment of the water on the impeller is increased, the energy loss is reduced, the flow collection work can be well finished even under low flow, and the influence of the flow on the measurement precision is reduced; meanwhile, the guide plate at the water outlet faces to the impeller rotating direction and the water inlet direction, so that the stability of the fluid can be improved, and the collection accuracy is ensured.

In the embodiment, the distance between the guide plates on the two sides of the water outlet is 11mm, and the water outlet is large, so that the discharge speed of water in the impeller box can be increased, and the generation of a swirling flow is avoided; the angle of wedge water conservancy diversion mouth is 30, and the water conservancy diversion effect is better, can effectively reduce inlet opening quantity, reduces the manufacturing degree of difficulty, simplifies the mould structure.

In this embodiment, the number of the water inlet holes, the number of the water outlet holes and the number of the trapezoidal diversion trenches are 4.

In this embodiment, the middle of the inner bottom of the impeller case body 100 is provided with a fixed protruding shaft 160 extending upwards, the fixed protruding shaft is used for stabilizing the impeller, the fixed protruding shaft is made of metal, the upper end of the fixed protruding shaft is provided with a tip, and the fixed protruding shaft 160 is inserted into the mounting hole in the middle of the inner bottom of the impeller case body 100.

Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.

If the utility model discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.

Any part provided by the utility model can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. An impeller box structure capable of improving reversal sensitivity is characterized in that: the impeller box comprises an impeller box body, wherein a plurality of water inlet holes are uniformly distributed along the circumferential direction of the circumferential wall of the lower part of the impeller box body, a plurality of water outlet holes are uniformly distributed along the circumferential direction of the circumferential wall of the upper part of the impeller box body, a trapezoidal diversion trench is arranged beside each water outlet on the circumferential wall of the upper part of the impeller box body, and the width of one end, facing the water flow direction, of each trapezoidal diversion trench is smaller than the width of one end, facing away from the water flow direction.

2. The impeller cartridge structure for improving sensitivity to reverse rotation of claim 1, wherein: the bottom surface of the trapezoidal diversion trench is an inclined plane with the depth gradually becoming deeper from the wider end to the narrower end.

3. The impeller cartridge structure for improving sensitivity to reverse rotation of claim 2, wherein: the inclination of the bottom surface of the trapezoidal diversion trench is 13 degrees.

4. The impeller cartridge structure for improving sensitivity to reverse rotation of claim 1, wherein: the water inlet hole is inclined relative to the radial direction of the impeller box body, the water outlet hole is inclined relative to the radial direction of the impeller box body, and the inclination directions of the water inlet hole and the water outlet groove are opposite; the two sides of the water outlet are provided with guide plates extending outwards; the periphery of the lower part of the impeller box body is provided with a wedge-shaped flow guide opening positioned at the water inlet hole.

5. The impeller cartridge structure for improving sensitivity to reverse rotation of claim 1, 2, 3 or 4, wherein: the number of the water inlet holes, the number of the water outlets and the number of the trapezoidal diversion trenches are 4.