Novel water meter impeller box

Abstract

The utility model provides a novel water meter impeller box which comprises an impeller box and an impeller, the center of the bottom of the impeller box is provided with a tip, the bottom of an impeller shaft of the impeller is provided with a top block, the bottom of the impeller box is provided with a mounting block, the mounting block is higher than the bottom of the impeller box, the top of the mounting block is provided with a plurality of first magnets and upper discharge ports, and the side face of the mounting block is provided with a plurality of side discharge ports. The upper discharge port is communicated with the side discharge port; a plurality of second magnetic blocks are embedded in the bottom of the impeller shaft, and the opposite faces of the first magnetic blocks and the second magnetic blocks are identical in magnetic attraction. A plurality of scrapers are arranged at the bottom of the impeller shaft. According to the utility model, the impeller is suspended by utilizing the homopolar repulsion phenomenon; when magnetic impurities on the surface of the first magnetic block are gradually accumulated to a certain height and then are in contact with the scraper, the scraper scrapes the magnetic impurities to the upper discharge port and then discharges the magnetic impurities from the side discharge port, so that the problem of magnetic force reduction caused by impurity accumulation is solved, the suspension property of the impeller is ensured, and the water meter can drive the impeller to rotate under the condition of low flow; and the metering accuracy of the water meter under the low-flow condition is improved.

Description

Technical Field

[0001] The utility model relates to the field of water meters, in particular to a novel impeller box of a water meter. Background Art

[0002] The water meter movement is one of the important components of the water meter. The water meter movement is generally composed of a counter, a gear box, an impeller, an impeller box and a filter. The impeller includes an impeller shaft and blades. There is a bushing under the impeller shaft, agate on the top of the bushing, a tip in the center of the impeller box, and the bushing is on the tip. When water enters the impeller box from the water meter case and impacts the impeller, the impeller generates a driving torque. When the driving torque of the impeller is greater than the resistance torque of the impeller, the impeller starts to rotate. Due to the effect of its own gravity, the impeller will generate static friction between the tip in the impeller box and the agate in the bushing. This part of friction becomes the resistance when the impeller rotates. In the case of low flow, the driving force generated by the water flow impacting the impeller is less than the static friction between the tip in the impeller box and the agate in the bushing. The water meter cannot measure accurately, and long-term friction can easily cause wear of the tip and agate, thereby affecting the measurement accuracy and service life of the water meter.

[0003] In this regard, the applicant's existing patent CN210893289U discloses a water meter movement with a magnetic suspension structure, which adds two annular magnets to keep the impeller in a suspended state, reducing the contact between the top and the agate, thereby greatly reducing the static friction between the top and the agate, improving the accuracy of the water meter flow, and effectively extending the service life of the water meter. However, in this solution, the two annular magnets are placed on the surface, and after a period of use, they will absorb too much magnetic impurities in the water, causing the magnetic force to decrease, and even causing impurities to accumulate between the two annular magnets, which will cause obstacles. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The purpose of the utility model is to provide a new water meter impeller box to avoid the problem of excessive accumulation of magnetic impurities leading to a decrease in magnetic force. To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] (II) Technical solution

[0007] A novel water meter impeller box comprises an impeller box and an impeller, wherein a top is provided at the bottom center of the impeller box, a top block is provided at the bottom of the impeller shaft of the impeller, and the top block is located above the top, a mounting block is provided at the bottom of the impeller box, and the mounting block is higher than the bottom of the impeller box, a plurality of first magnetic blocks and an upper discharge port are provided at the top, and a plurality of side discharge ports are provided at the side, and the upper discharge port and the side discharge port are connected; a plurality of second magnetic blocks are embedded at the bottom of the impeller shaft, and the magnetic attraction of the opposite surfaces of the first magnetic blocks and the second magnetic blocks is the same; a plurality of scrapers are provided at the bottom of the impeller shaft, and the scrapers extend downward and protrude from the bottom surface of the impeller shaft.

[0008] Furthermore, an attraction magnetic ring is provided at the bottom of the impeller box, and the attraction magnetic ring is arranged around the mounting block.

[0009] Furthermore, a positioning column is provided at the bottom of the impeller box, and the positioning column matches with the positioning hole at the bottom of the mounting block.

[0010] Furthermore, the scraper is arranged at an angle.

[0011] Furthermore, the first magnetic block and the second magnetic block are both distributed in a ring shape.

[0012] Furthermore, the number of the upper row ports is the same as that of the first magnetic blocks and the upper row ports are arranged alternately with the first magnetic blocks.

[0013] Furthermore, the side discharge port is in an inclined state with the inner side higher and the outer side lower.

[0014] Furthermore, when the top tip contacts the top block, there is still a gap between the scraper, the mounting block and the first magnetic block.

[0015] Furthermore, the number of the scrapers is at least two and the scrapers are symmetrically centered about the axis of the impeller shaft, and both sides of the orthographic projection of the scrapers on the mounting block extend beyond both sides of the first magnetic block.

[0016] Furthermore, the scraper is V-shaped, and its tip points to the rotation direction of the impeller.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, a mounting block is arranged at the bottom of the impeller box, a plurality of first magnetic blocks and an upper discharge port are arranged on the top of the mounting block, a plurality of side discharge ports are arranged on the side, the upper discharge port and the side discharge port are connected, and then a plurality of second magnetic blocks and scrapers are arranged at the bottom of the impeller shaft. The magnetic attraction of the opposite surfaces of the first magnetic block and the second magnetic block is the same, and the impeller is suspended by utilizing the phenomenon of like-pole repulsion. When more magnetic impurities are adsorbed on the surface of the first magnetic block, these magnetic impurities will gradually accumulate on the surface of the first magnetic block until they come into contact with the scraper at a certain height, and the scraper will scrape them off to the upper discharge port and then discharge them from the side discharge port, thereby solving the problem of magnetic force reduction caused by impurity accumulation, ensuring the suspension of the impeller, ensuring that the water meter can drive the impeller to rotate under low flow conditions, and improving the metering accuracy of the water meter under low flow conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0020] Figure 1 is an overall cross-sectional view of the first embodiment;

[0021] Figure 2 yes Figure 1 The local enlarged schematic diagram of point Ⅰ in the middle;

[0022] Figure 3 is a schematic diagram of the cooperation between the mounting block and the impeller shaft in the first embodiment;

[0023] Figure 4 It is a bottom view of the impeller shaft in the second embodiment.

[0024] Description of Figure Numbers:

[0025] 1. Impeller box; 2. Impeller; 21. Impeller shaft;

[0026] 3. Top; 4. Top block; 5. Mounting block;

[0027] 6. First magnetic block; 61. Upper discharge port; 62. Side discharge port;

[0028] 7. Second magnetic block; 8. Scraper; 9. Attracting magnetic ring;

[0029] 10. Positioning column. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Embodiment 1

[0036] See also Figures 1 to 3 As shown, a novel water meter impeller box comprises an impeller box 1 and an impeller 2. A top 3 is provided at the bottom center of the impeller box 1. A top block 4 made of agate is provided at the bottom of the impeller shaft 21 of the impeller 2. The top block 4 is located above the top 3. A mounting block 5 is provided at the bottom of the impeller box 11. The mounting block 5 is higher than the bottom of the impeller box 1. A plurality of first magnetic blocks 6 and an upper discharge port 61 are provided at the top, and a plurality of side discharge ports 62 are provided at the side. The upper discharge port 61 and the side discharge port 62 are connected. The side discharge port 62 is inclined inside and outside, which is convenient for discharging impurities. A plurality of second magnetic blocks 7 are embedded at the bottom of the impeller shaft 21. The magnetic attraction of the opposite surfaces of the first magnetic block 6 and the second magnetic block 7 is the same. A plurality of scrapers 8 are provided at the bottom of the impeller shaft 21. The scrapers 8 extend downward and protrude from the bottom surface of the impeller shaft 21.

[0037] Through the above scheme, when more magnetic impurities are adsorbed on the surface of the first magnetic block 6, these magnetic impurities will gradually accumulate on the surface of the first magnetic block 6 until they come into contact with the scraper 8 at a certain height. The scraper 8 will then scrape them off to the upper discharge port 61 and then discharge them from the side discharge port 62, thereby solving the problem of magnetic force drop caused by impurity accumulation, ensuring the suspension of the impeller 2, ensuring that the water meter can drive the impeller 2 to rotate under low flow conditions, and improving the metering accuracy of the water meter under low flow conditions.

[0038] It is worth mentioning that Figure 2 As shown, an attraction magnetic ring 9 is provided at the bottom of the impeller box 1, and the attraction magnetic ring 9 is arranged around the mounting block 5; on the one hand, the setting of the attraction magnetic ring 9 can absorb the magnetic impurities discharged from the side discharge port 62 to prevent them from being absorbed by the first magnetic block 6 again; on the other hand, the area of ​​the attraction magnetic ring 9 is larger than the first magnetic block 6, so the magnetic impurities can be captured before being absorbed by the first magnetic block 6, thereby reducing the number of magnetic impurities absorbed by the first magnetic block 6.

[0039] It can be understood that in the present embodiment, the first magnetic block 6 and the second magnetic block 7 are both distributed in a ring shape, and a positioning column 10 is provided at the bottom of the impeller box 1. The positioning column 10 cooperates with the positioning hole at the bottom of the mounting block 5 to ensure the stability of the mounting block 5, so that it can be set to a cylindrical shape, which is convenient for the arrangement of the first magnetic block 6.

[0040] Considering that the scraper 8 will generate a certain resistance when the impeller shaft 21 rotates, the scraper 8 is set at an angle to reduce the pressure loss.

[0041] Preferably, the number of the upper discharge ports 61 is the same as that of the first magnetic blocks 6 and they are arranged alternately with the first magnetic blocks 6 , so that impurities on each first magnetic block 6 can be discharged.

[0042] It should be noted that when the top 3 contacts the top block 4 , there is still a gap between the scraper 8 and the mounting block 5 and the first magnetic block 6 to avoid friction between the scraper 8 and the mounting block 5 or the first magnetic block 6 .

[0043] To ensure the stability of the impeller shaft 21 during rotation, the number of scrapers 8 is at least two and the axis of symmetry is centered on the axis of the impeller shaft 21; at the same time, both sides of the orthographic projection of the scraper 8 on the mounting block 5 exceed both sides of the first magnetic block 6, which can ensure that the scraper 8 can cover the range of impurities on the first magnetic block 6.

[0044] Embodiment 2

[0045] like Figure 4 The difference between this embodiment and the first embodiment is at least that the scraper 8 is V-shaped, and its tip points to the rotation direction of the impeller 2.

[0046] This technical solution can effectively reduce the resistance generated when the scraper 8 rotates, thereby reducing the pressure loss of the water meter.

[0047] It should be added that when the flow rate is low, the rotation speed of the impeller shaft 21 is low. In this case, the rotation of the scraper 8 does not produce a large resistance, so the water flow can drive the impeller 2 to rotate; when the flow rate is large, the resistance generated by the rotation of the scraper 8 will only increase part of the pressure loss and will not affect the accuracy of the water meter.

[0048] In other embodiments, the scraper 8 may be in a teardrop shape, a triangle shape, or other low-resistance shape, which will not be described in detail in this application.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A novel water meter impeller box, comprising an impeller box (1) and an impeller (2), wherein a top point (3) is provided at the bottom center of the impeller box (1), and a top block (4) is provided at the bottom of the impeller shaft (21) of the impeller (2), wherein the top block (4) is located above the top point (3), and characterized in that: The bottom of the impeller box (1) is provided with a mounting block (5), the mounting block (5) is higher than the bottom of the impeller box (1), the top of the mounting block (5) is provided with a plurality of first magnetic blocks (6) and an upper discharge port (61), and the side of the mounting block (5) is provided with a plurality of side discharge ports (62), the upper discharge port (61) and the side discharge port (62) are connected; the bottom of the impeller shaft (21) is provided with a plurality of second magnetic blocks (7), the opposite surfaces of the first magnetic blocks (6) and the second magnetic blocks (7) have the same magnetic attraction; the bottom of the impeller shaft (21) is provided with a plurality of scrapers (8), the scrapers (8) extend downward and protrude from the bottom surface of the impeller shaft (21).

2. According to claim 1, a new water meter impeller box is characterized in that: An attraction magnetic ring (9) is provided at the bottom of the impeller box (1), and the attraction magnetic ring (9) is arranged around the mounting block (5).

3. According to claim 1, a new type of water meter impeller box is characterized in that: The bottom of the impeller box (1) is provided with a positioning column (10), and the positioning column (10) matches with the positioning hole at the bottom of the mounting block (5).

4. According to claim 1, a new water meter impeller box is characterized in that: The scraper (8) is arranged at an angle.

5. According to claim 1, a new water meter impeller box is characterized in that: The first magnetic block (6) and the second magnetic block (7) are both distributed in a ring shape.

6. According to claim 1, a new type of water meter impeller box is characterized in that: The number of the upper row openings (61) is the same as that of the first magnetic blocks (6) and they are arranged alternately with the first magnetic blocks (6).

7. According to claim 1, a new type of water meter impeller box is characterized in that: The side discharge port (62) is in an inclined state with the inner side higher and the outer side lower.

8. According to claim 1, a new type of water meter impeller box is characterized by: When the top (3) contacts the top block (4), there is still a gap between the scraper (8), the mounting block (5) and the first magnetic block (6).

9. According to claim 1, a new type of water meter impeller box is characterized in that: The number of the scrapers (8) is at least two and the scrapers (8) are symmetrically centered about the axis of the impeller shaft (21), and both sides of the orthographic projection of the scrapers (8) on the mounting block (5) extend beyond both sides of the first magnetic block (6).

10. According to claim 1, a new type of water meter impeller box is characterized in that: The scraper (8) is V-shaped, and its tip points to the rotation direction of the impeller (2).

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