A new single flow beam water meter structure

Abstract

The utility model discloses a novel single flow water meter structure, including watchcase, sealing plate and impeller subassembly, be equipped with watchcase bushing in watchcase, install watchcase axle sleeve and watchcase flat bearing on watchcase bushing, be equipped with sealing plate bushing and sealing plate bearing on sealing plate, and impeller subassembly includes impeller and impeller steel axle, and impeller steel axle cooperations with watchcase axle sleeve, sealing plate bushing realizes radial limit, and can axial motion between watchcase flat bearing and sealing plate bearing, the bottom fixed setting of impeller subassembly has impeller bottom magnetic steel, and the position fixed setting of bushing magnetic steel corresponds impeller bottom magnetic steel on watchcase bushing, and impeller bottom magnetic steel and bushing magnetic steel magnetism are same, in the utility model discloses, through the repulsion between magnetic steel, make impeller keep suspended state under small flow, avoided the contact of impeller steel axle and watchcase flat bearing, significantly reduced the friction resistance, effectively improved the measurement performance of water meter in small flow test point (such as Q1), solved the problem of measurement negative.

Description

Technical Field

[0001] This utility model relates to the field of industrial instrumentation technology, and in particular to a novel single-stream water meter structure. Background Technology

[0002] In common single-stream water meters, the impeller assembly is connected to the housing assembly and sealing plate assembly via an impeller steel shaft. The housing assembly contains a housing bushing, which houses a housing bushing and a housing flat bearing. The sealing plate assembly contains a sealing plate bushing and a sealing plate bearing. The impeller steel shaft, housing bushing, and sealing plate bushing work together to achieve radial limitation, allowing the impeller assembly to move only axially up and down. The housing flat bearing and sealing plate bearing are used for lower and upper limit positioning of the impeller steel shaft, respectively, and also provide lubrication during impeller rotation.

[0003] The impeller steel shaft has a certain axial travel between the housing flat bearing and the sealing plate bearing. Under different water flow conditions, the support state of the impeller assembly changes: when the water flow is large, the force exerted by the water flow on the impeller is much greater than the impeller's weight, causing the impeller assembly to float, and the impeller steel shaft to contact the sealing plate bearing, resulting in an upper support state; when the water flow is moderate, the force exerted by the water flow balances the impeller's weight, and the impeller steel shaft is suspended, not in contact with any bearing; when the water flow is small, the force exerted by the water flow is less than the impeller's weight, causing the impeller assembly to sink, and the impeller steel shaft to contact the housing flat bearing, resulting in a lower support state. Theoretically, friction loss is minimized and metering accuracy is highest when the impeller is in a suspended state.

[0004] However, in practical use, the impeller is usually in a lower support state at the commonly used metering points of water meters (such as the boundary test point Q2 and the small flow test point Q1) due to the small flow rate. Especially at the high-multiplier metering point Q1, the frictional resistance between the impeller steel shaft and the flat bearing of the meter casing will cause the metering performance of the water meter to be negative at small flow rates, affecting the metering accuracy. Therefore, a new type of single-jet water meter structure is needed to meet people's needs. Utility Model Content

[0005] The purpose of this invention is to provide a novel single-jet water meter structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel single-stream water meter structure, comprising a meter housing, a sealing plate, and an impeller assembly. The meter housing contains a meter housing bushing, on which a meter housing bushing and a meter housing flat bearing are mounted; the sealing plate contains a sealing plate bushing and a sealing plate bearing; the impeller assembly includes an impeller and an impeller steel shaft, the impeller steel shaft cooperating with the meter housing bushing and the sealing plate bushing to achieve radial limiting, and is capable of axial movement between the meter housing flat bearing and the sealing plate bearing.

[0007] The bottom of the impeller assembly is fixedly provided with an impeller bottom magnet;

[0008] A bushing magnet is fixedly installed on the housing bushing at the position corresponding to the bottom magnet of the impeller.

[0009] The impeller bottom magnet and the bushing magnet have the same magnetism and generate a repulsive force against each other.

[0010] When the water flow rate is low, this repulsive force can support the impeller assembly, allowing the impeller steel shaft to suspend in a position that does not contact the housing flat bearing or the sealing plate bearing.

[0011] Preferably, both the impeller bottom magnet and the bushing magnet are single-stage magnets.

[0012] Preferably, by adjusting the magnetic force of the impeller bottom magnet and the bushing magnet, the gap between the impeller steel shaft and the housing flat bearing and the sealing plate bearing in the suspended state can be adjusted.

[0013] Preferably, the case bushing is fixed inside the case by an adjusting plate.

[0014] The beneficial effects of this utility model are:

[0015] In this invention, the repulsive force between the magnets keeps the impeller suspended at low flow rates, avoiding contact between the impeller steel shaft and the flat bearing of the meter casing, significantly reducing frictional resistance, effectively improving the metering performance of the water meter at low flow test points (such as Q1), and solving the problem of negative metering.

[0016] In this invention, by adjusting the magnetic force of the magnet, the position of the impeller steel shaft in the suspended state (i.e., the gap with the bearing) can be precisely controlled, which facilitates the optimization of the water meter's performance under different flow conditions. The structure is simple, the modification is convenient, and it is beneficial to improve the overall metering multiple and long-term stability of the water meter. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a novel single-jet water meter proposed in this utility model;

[0018] Figure 2 This is a front cross-sectional view of a novel single-jet water meter structure proposed in this utility model.

[0019] Figure 3 This utility model proposes a novel single-jet water meter structure. Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This utility model proposes a novel single-jet water meter structure. Figure 2 Enlarged structural diagram at point B.

[0021] In the diagram: 1. Case; 2. Adjusting plate; 3. Top magnet of impeller; 4. Sealing plate; 5. Sealing plate bushing; 6. Sealing plate bearing; 7. Impeller steel shaft; 8. Case bushing; 9. Bottom magnet of impeller; 10. Bushing magnet; 11. Case flat bearing; 12. Case bushing. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-4 A case bushing 12 is fixedly installed inside the case 1 via an adjusting plate 2. The case bushing 12 is equipped with a case sleeve 8, a case flat bearing 11, and a bushing magnet 10. A sealing plate bushing 5 and a sealing plate bearing 6 are installed on the sealing plate 4. The impeller assembly includes an impeller 9 and an impeller steel shaft 7. The impeller steel shaft 7 cooperates with the case sleeve 8 and the sealing plate bushing 5 to achieve radial limiting, and can move axially between the case flat bearing 11 and the sealing plate bearing 6. A bottom magnet (not separately labeled in the figure, located at the bottom of the impeller 9) is fixedly installed at the bottom of the impeller assembly, its position corresponding to the bushing magnet 10.

[0024] Both the impeller bottom magnet and the bushing magnet 10 are single-stage magnets with the same magnetism, generating a repulsive force between them. When the water flow is small, the force exerted by the water flow on the impeller is insufficient to overcome the impeller's weight, and the impeller assembly tends to sink. However, because the repulsive force between the two magnets increases as the distance decreases, the impeller assembly will reach a force balance at a certain position, causing the impeller steel shaft 7 to suspend between the housing flat bearing 11 and the sealing plate bearing 6, avoiding contact with either bearing.

[0025] By selecting magnets with different magnetic forces or adjusting the spacing between the magnets, the clearance between the impeller steel shaft and the bearing in the suspended state can be adjusted, thereby optimizing the water meter's performance under different flow rates. This structure effectively reduces frictional resistance at low flow rates, improving metering accuracy and reliability.

[0026] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A novel single-jet water meter structure, comprising a meter housing (1), a sealing plate (4), and an impeller assembly, wherein a meter housing bushing (12) is provided inside the meter housing (1), a meter housing bushing (8) and a meter housing flat bearing (11) are provided on the meter housing bushing (12), a sealing plate bushing (5) and a sealing plate bearing (6) are provided on the sealing plate (4), and the impeller assembly comprises an impeller and an impeller steel shaft (7), wherein the impeller steel shaft (7) cooperates with the meter housing bushing (8) and the sealing plate bushing (5) to achieve radial limiting, and can move axially between the meter housing flat bearing (11) and the sealing plate bearing (6), characterized in that: The bottom of the impeller assembly is fixedly provided with an impeller bottom magnet (9); A bushing magnet (10) is fixedly provided on the housing bushing (12) at the position corresponding to the bottom magnet (9) of the impeller; The impeller bottom magnet (9) and the bushing magnet (10) have the same magnetism and generate a repulsive force on each other, so that when the water flow is small, the impeller steel shaft (7) can be suspended in a position that does not contact the housing flat bearing (11) or the sealing plate bearing (6).

2. The novel single-jet water meter structure according to claim 1, characterized in that: Both the impeller bottom magnet (9) and the bushing magnet (10) are single-stage magnets.

3. The novel single-jet water meter structure according to claim 1, characterized in that: By adjusting the magnetic force of the impeller bottom magnet (9) and the bushing magnet (10), the gap between the impeller steel shaft (7) and the case flat bearing (11) and the sealing plate bearing (6) in the suspended state can be adjusted.

4. The novel single-jet water meter structure according to claim 1, characterized in that: The case bushing (12) is fixed inside the case (1) by the adjusting plate (2).

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