Dry-type depressurization water meter

Abstract

The utility model discloses a dry type depressurization water meter which comprises a meter shell, an inner cavity of the meter shell is divided into an upper cavity and a lower cavity through an annular partition plate, and the meter shell is provided with a water inlet connector communicated with the lower cavity and a water outlet connector communicated with the upper cavity. A movement is arranged in the meter shell, an impeller is arranged in the movement, and a radial protruding ring is arranged in the middle of the movement and abuts against an annular partition plate in an inner cavity of the meter shell in a sealed mode. The machine core comprises an upper cover, an upper fluid director and a lower fluid director which are sequentially connected, a lower magnetic gear is arranged in the upper cover, and the impeller shaft penetrates through a top plate of the upper fluid director and then is fixed to the lower magnetic gear. An air inlet penetrates through a top plate of the upper fluid director, an inner cavity of the upper cover is communicated with the air inlet, the upper fluid director is provided with an exhaust channel, an inlet of the exhaust channel is communicated with the inner cavity of the upper cover, and an outlet of the exhaust channel is communicated with a side opening of the upper fluid director and an upper cavity of the meter shell. The water meter can discharge air gathered in the inner cavity of the upper cover smoothly.

Description

Technical Field

[0001] The utility model relates to the field of water meter measuring instruments, in particular to a dry-type pressure-reducing water meter. Background Art

[0002] The characteristic of dry water meter is that the counter and impeller shaft are coupled and driven by upper and lower magnetic gears. The counter is isolated from the water being measured, so the counting mechanism is not affected by suspended impurities in the water. The readings are clear, the measurement is accurate, and the meter is durable.

[0003] Conventional dry water meters include a meter case, e.g. Figures 1 to 3 As shown, the inner cavity of the case is divided into an upper cavity 102 and a lower cavity 115 by an annular partition 101, and the case is provided with a water inlet joint 103 and a water outlet joint 104, the water inlet joint is connected to the lower cavity, and the water outlet joint is connected to the upper cavity; a movement is provided in the case, an impeller 105 is provided in the movement, a radial convex ring 106 is provided in the middle of the movement, and the radial convex ring is sealed against the annular partition of the inner cavity of the case; the movement includes an upper cover 107, an upper deflector 108 and a lower deflector 109 connected in sequence, a lower magnetic gear 110 is provided in the upper cover, and the impeller shaft 116 is fixed to the lower magnetic gear after passing through the top plate of the upper deflector; a meter cover 111 is connected to the case, and a water meter counter 112 is located in the meter cover, and an upper magnetic gear 113 coupled to the lower magnetic gear is provided inside the counter. Water flows into the movement from the lower port of the lower deflector, then drives the impeller and flows out from the side port of the upper deflector. The rotating impeller drives the upper magnetic gear through the impeller shaft and the lower magnetic gear, thereby triggering the counter to measure.

[0004] There is a common problem in the use of dry water meters. The water contains air. When the water to be measured enters the meter case, the bubbles will move upward along the impeller axis, pass through the center hole of the upper deflector top plate and gather in the inner cavity of the upper cover, that is, the area around the lower magnetic gear, destroying the balance and stability of the air pressure in the area, thereby destroying and interfering with the concentricity and stability of the rotation of the lower magnetic gear, causing it to rotate eccentrically and even scratch the inner wall of the upper cover, thereby affecting the normal measurement of the water meter.

[0005] To overcome these drawbacks, industry experts have proposed improvements, such as creating multiple small vents 114 in the top plate of the upper deflector. This would allow air trapped within the upper cover's cavity to enter the upper deflector through the vents and be discharged along the water flow, sequentially through the upper deflector's side openings, the upper case cavity, and the water outlet connector. However, in actual use, these improvements have proven to be less than ideal for pressure relief. The pressure relief path is obstructed, and much of the air remains trapped and accumulated within the upper cover, continuously disrupting the concentricity and stability of the lower magnetic gear's rotation. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a dry-type pressure-reducing water meter which can smoothly discharge the air accumulated in the inner cavity of the upper cover.

[0007] The technical solution of the present utility model is to provide a dry-type step-down water meter, which includes a case, an inner cavity of the case is divided into an upper cavity and a lower cavity by an annular partition, the case is provided with a water inlet joint connected to the lower cavity and a water outlet joint connected to the upper cavity; a movement is provided in the case, an impeller is provided in the movement, a radial convex ring is provided in the middle of the movement, the radial convex ring is sealed and abuts against the annular partition in the inner cavity of the case; the movement includes an upper cover, an upper deflector and a lower deflector connected in sequence, a lower magnetic gear is provided in the upper cover, the impeller shaft is fixed to the lower magnetic gear after passing through the top plate of the upper deflector; an air inlet hole is passed through the top plate of the upper deflector, the inner cavity of the upper cover is connected to the air inlet hole, the upper deflector is provided with an exhaust channel, the inlet of the exhaust channel is connected to the inner cavity of the upper cover, and the outlet of the exhaust channel is connected to the side port of the upper deflector and the upper cavity of the case.

[0008] The design idea of ​​the above structure is that the air inlet hole expands the channel for the bubbles in the water to be tested to rise, that is, it increases the power of gas circulation, so that the gas rises quickly to the top of the inner cavity of the upper cover, and then is quickly discharged to the side port of the upper deflector through the exhaust channel, and finally discharged from the case through the upper cavity, so that the inner cavity of the upper cover, that is, the area around the lower magnetic gear, quickly reaches the effect of pressure balance.

[0009] From the above analysis, it can be seen that the dry-type step-down water meter using the above structure has the following advantages compared with the existing technology.

[0010] The water meter can quickly discharge the air accumulated in the inner cavity of the upper cover. The gas circulation power is strong and the pressure relief is smooth, ensuring the concentricity and stability of the rotation of the lower magnetic gear, thereby ensuring normal, stable and long-term measurement of the water meter.

[0011] Preferably, the inlet of the exhaust channel is provided with an exhaust pipe protruding from the top plate of the upper deflector, the upper end of the exhaust pipe is located in the inner cavity of the upper cover, and the upper end of the exhaust pipe is close to the top plate of the inner cavity of the upper cover; in this way, because bubbles tend to gather at the top of the inner cavity of the upper cover, the inlet of the exhaust channel is designed to be as close to the top of the inner cavity of the upper cover as possible, the exhaust pressure relief effect is better, and the air pressure balance can be achieved more quickly.

[0012] As a further preferred embodiment, an annular boss with a center hole is provided on the top of the upper deflector, and the boss extends into the inner cavity of the upper cover. The wall of the center hole of the boss is fixed with a sleeve through three connecting ribs, and the impeller shaft is gap-fitted in the sleeve; every two adjacent connecting ribs, the sleeve and the wall of the center hole together form a fan-shaped air inlet hole; in this way, the sleeve meets the stability of the upper assembly of the impeller shaft, and the part of the boss except the sleeve forms three large air inlet holes, and most of the area except the sleeve is allocated to the air inlet hole, which maximizes the channel cross-sectional area of ​​the air inlet hole, thereby significantly increasing the power of the exhaust cycle and obtaining a better pressure relief balance effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a semi-sectional structural schematic diagram of a dry-type step-down water meter in the prior art.

[0014] Figure 2 The present invention is a schematic structural diagram of the movement of a dry-type step-down water meter in the prior art.

[0015] Figure 3 yes Figure 2 Schematic diagram of the half-section structure.

[0016] Figure 4 It is a semi-sectional structural schematic diagram of the utility model dry-type step-down water meter.

[0017] Figure 5 yes Figure 4 Schematic diagram of the explosion structure.

[0018] Figure 6 The utility model is a schematic diagram of the exploded structure of the movement of the dry-type step-down water meter.

[0019] As shown in the figure

[0020] Components of the prior art 101, annular partition, 102, upper chamber, 103, water inlet connector, 104, water outlet connector, 105, impeller, 106, radial convex ring, 107, upper cover, 108, upper deflector, 109, lower deflector, 110, lower magnetic gear, 111, meter cover, 112, counter, 113, upper magnetic gear, 114, vent, 115, lower chamber, 116, impeller shaft;

[0021] The components of the present utility model include: 1. a watch case; 2. a pressure cover; 3. a watch cover; 4. a counter; 5. an upper magnetic gear; 6. an annular partition; 7. a water inlet joint; 8. a water outlet joint; 9. an impeller; 10. a radial convex ring; 11. an upper cover; 12. an upper deflector; 13. a lower deflector; 14. a lower magnetic gear; 15. an impeller shaft; 16. an air inlet; 17. annular boss; 18. a connecting rib; 19. a shaft sleeve; 20. an exhaust channel outlet; 21. an exhaust pipe; and 22. an upper opening. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 4-6 As shown, the utility model dry-type step-down water meter includes a meter case 1, an opening on the meter case 1 is screwed with a gland 2, the gland 2 is connected to a meter cover 3, a water meter counter 4 is located in the meter cover 3, and an upper magnetic gear 5 is provided inside the counter 4.

[0024] The inner cavity of the watch case 1 is divided into an upper chamber and a lower chamber by an annular partition 6. The watch case 1 is equipped with a water inlet connection 7 communicating with the lower chamber and a water outlet connection 8 communicating with the upper chamber. The watch case 1 houses a movement, which houses an impeller 9. A radially convex ring 10 is located in the center of the movement. The movement is pressed downward by the pressure cover 2, causing the radially convex ring 10 to seal against the annular partition 6 in the inner cavity of the watch case 1. The movement comprises an upper cover 11, an upper deflector 12, and a lower deflector 13, which are screwed together in sequence. A lower magnetic gear 14 is housed within the upper cover 11. An impeller shaft 15 passes through the top plate of the upper deflector 12 and is fixed to the lower magnetic gear 14. The lower magnetic gear 14 is coupled to the upper magnetic gear 5 for transmission.

[0025] The top plate of the upper deflector 12 is penetrated by an air inlet 16, which communicates with the interior of the upper cover 11. Specifically, an annular boss 17 with a central hole protrudes from the top plate of the upper deflector 12. The top of the boss extends into the interior of the upper cover 11. A central sleeve 19 is fixed to the wall of the central hole of the boss via three connecting ribs 18. The impeller shaft 15 is loosely fitted within the sleeve 19. Every two adjacent connecting ribs 18, the sleeve 19, and the wall of the central hole together form a fan-shaped air inlet 16. In other words, the top of the boss is provided with three hollow fan-shaped air inlet holes 16.

[0026] The upper deflector 12 also has an exhaust passage. Its inlet communicates with the interior of the upper cover 11, while its outlet 20 communicates with a side port of the upper deflector 12, which in turn communicates with the upper chamber of the watch case 1. Specifically, the inlet of the exhaust passage is provided with an exhaust pipe 21 that protrudes from the top plate of the upper deflector 12. The upper port 22 of the exhaust pipe 21 is located within the interior of the upper cover 11. The exhaust pipe 21 also protrudes from the top surface of the annular boss 17, and the upper port 22 of the exhaust pipe 21 is close to the interior of the upper cover 11. For example, the distance between the upper port 22 of the exhaust pipe 21 and the interior of the upper cover 11 is no more than 10 mm.

[0027] Of course, the above idea of ​​adding air inlets and exhaust channels is also applicable to wet water meters, because wet water meters are also troubled by the accumulation of bubbles in the upper part. The bubbles are generally concentrated in the counter of the wet water meter. Therefore, multiple air inlets are added to the lower plate of the counter shell, and the upper end of an exhaust pipe is extended into the counter shell and fits the top cover of the counter shell. It can also accelerate the exhaust and quickly achieve the effect of air pressure balance in the counter on the top of the water meter.

Claims

1. A dry-type step-down water meter, comprising a case, the inner cavity of which is divided into an upper cavity and a lower cavity by an annular partition, the case being provided with a water inlet joint communicating with the lower cavity and a water outlet joint communicating with the upper cavity; a movement disposed within the case, the movement being provided with an impeller, a radially convex ring disposed in the middle of the movement, the radially convex ring being in sealing contact with the annular partition of the case inner cavity; the movement comprising an upper cover, an upper deflector, and a lower deflector connected in sequence, the upper cover being provided with a lower magnetic gear, the impeller shaft passing through the top plate of the upper deflector and being fixed to the lower magnetic gear; and characterized in that: The upper deflector top plate is penetrated by an air inlet hole, the upper cover inner cavity is connected to the air inlet hole, the upper deflector is provided with an exhaust channel, the inlet of the exhaust channel is connected to the upper cover inner cavity, and the outlet of the exhaust channel is connected to the side port of the upper deflector and the upper cavity of the case.

2. The dry-type step-down water meter according to claim 1, characterized in that: An exhaust pipe protruding from the top plate of the upper deflector is provided at the inlet of the exhaust channel. The upper opening of the exhaust pipe is located in the inner cavity of the upper cover and is close to the top plate of the inner cavity of the upper cover.

3. The dry-type step-down water meter according to claim 1, characterized in that: An annular boss with a center hole is provided on the top of the upper deflector. The boss extends into the inner cavity of the upper cover. The wall of the center hole of the boss is fixed with a shaft sleeve through three connecting ribs, and the impeller shaft gap is fitted in the shaft sleeve; every two adjacent connecting ribs, the shaft sleeve, and the wall of the center hole together form a fan-shaped air inlet.

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