Dry-type anti-freezing water meter

Abstract

The utility model relates to the technical field of measuring instruments, and discloses a dry type anti-freezing water meter which comprises a meter shell, a counter box, a rectifying plate and an impeller box, a cavity is formed in the middle of the meter shell, a water inlet and a water outlet communicated with the cavity are formed in the two sides of the meter shell, the counter box is arranged on the meter shell, a counter is arranged in the counter box, and the rectifying plate is arranged in the impeller box. The rectifying plate is arranged at the bottom of the counter box, a pressure reduction cavity is formed between the rectifying plate and the counter box, the impeller box is arranged at the bottom of the cavity, an impeller is arranged in the impeller box, an impeller shaft of the impeller penetrates through the rectifying plate and is connected with the counter, a pressure reduction plate is arranged in the pressure reduction cavity, and the upper surface of the pressure reduction plate is attached to the rectifying plate in a contact mode. A pressure reducing spring is arranged between the pressure reducing plate and the counter box, and a through hole is formed in the rectifying plate. The pressure-reducing cavity is arranged between the rectifying plate and the counter box, and the pressure-reducing spring is compressed when the interior of the meter is frozen, so that the volume of the interior of the meter is increased. The water meter is prevented from being damaged by icing and the service life of the water meter is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of measuring instrument technology, specifically to a dry-type antifreeze water meter. Background Technology

[0002] Existing dry water meters mainly consist of a casing and metering components, impeller components, and master-slave drive magnets installed inside the casing. A partition is installed at the bottom of the metering component, dividing the inside of the casing into a water flow chamber and a chamber for installing the metering component. The impeller component is installed in the water flow chamber. After all components are installed, the space inside the casing remains basically fixed, that is, its volume remains unchanged. This constant volume is convenient for water meter measurement and installation.

[0003] However, when the outside temperature drops below zero degrees Celsius, traditional dry water meters will freeze inside. The internal volume expands and there is no buffer or pressure relief space, which will cause the counter box to crack and then conduct to the meter glass, causing damage. The water meter may freeze and explode. This kind of water meter is completely damaged due to low temperature, which brings huge economic losses to users and water supply companies. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing dry water meters are prone to freezing at low temperatures, leading to damage to the water meters.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is to provide a dry-type antifreeze water meter, including a meter housing, a counter box, a rectifier plate, and an impeller box. The meter housing has a cavity in the middle and water inlets and outlets communicating with the cavity on both sides. The counter box is located on the meter housing and contains a counter. The rectifier plate is located at the bottom of the counter box and forms a pressure-reducing cavity with the counter box. The impeller box is located at the bottom of the cavity and contains an impeller. The impeller shaft of the impeller passes through the rectifier plate and is connected to the counter. A pressure-reducing plate is located in the pressure-reducing cavity. The upper surface of the pressure-reducing plate is in contact with and attached to the rectifier plate. A pressure-reducing spring is provided between the pressure-reducing plate and the counter box. The rectifier plate has through holes.

[0006] Optionally, a sealing ring is provided between the pressure reducing plate, the counter box, and the impeller shaft.

[0007] Optionally, the impeller box has an opening at the bottom, and filter screens are provided on both sides.

[0008] In summary, this invention incorporates a pressure-reducing cavity between the rectifier plate and the counter box. When ice forms inside the meter, the pressure-reducing spring is compressed, increasing the internal volume of the meter. This prevents damage to the water meter caused by ice formation and extends its service life. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] In the diagram: 1. Counter; 2. Counter box; 3. Pressure reducing plate; 4. First sealing ring; 5. Second sealing ring; 6. Pressure reducing spring; 7. Rectifier plate; 8. Impeller; 9. Impeller box; 10. Filter screen; 11. Case. Detailed Implementation

[0011] The following combination Figure 1 The present invention will be described in further detail below.

[0012] This utility model discloses a dry-type antifreeze water meter, referring to... Figure 1 The device includes a housing 11, a counter box 2, a rectifier plate 7, and an impeller box 9. The housing 11 has a cavity in the middle and water inlets and outlets on both sides that communicate with the cavity. The counter box 2 is located on the housing 11 and contains a counter 1. The rectifier plate 7 is located at the bottom of the counter box 2 and forms a pressure-reducing cavity with the counter box 2. The impeller box 9 is located at the bottom of the cavity and contains an impeller 8. The impeller shaft of the impeller 8 passes through the rectifier plate 7 and is connected to the counter 1. A pressure-reducing plate 3 is located in the pressure-reducing cavity and is in contact with the rectifier plate 7. A pressure-reducing spring 6 is located between the upper surface of the pressure-reducing plate 3 and the counter box 2. The rectifier plate 7 has through holes.

[0013] In a further embodiment, a first sealing ring 4 is provided between the pressure reducing plate 3 and the counter box 2, and a second sealing ring 5 is provided between the pressure reducing plate 3 and the impeller shaft for sealing between the pressure reducing plate 3 and the counter box 2. The bottom of the impeller box 9 is open, and filter screens 10 are provided on both sides.

[0014] In this invention, a pressure-reducing spring 6 and a pressure-reducing plate 3 are located between the counter box 2 and the rectifier plate 7. The rectifier plate 7 has through holes, allowing the water in the meter casing 11 to directly contact the pressure-reducing plate 3. The pressure-reducing spring 6 between the pressure-reducing plate 3 and the counter box 2 bears a force greater than the normal working water pressure, ensuring that the pressure-reducing plate 3 does not rise or move under the actual working water pressure, thus maintaining a certain cavity. When the ambient temperature drops, the water in the meter casing expands in volume during the freezing process, increasing the water pressure. Part of the water pressure acts directly on the pressure-reducing plate 3 through the through holes on the rectifier plate 7. The pressure-reducing spring 6 contracts under the influence of the pressure, and the pressure-reducing plate 3 rises, compressing the air in the cavity and increasing the internal cavity, preventing water pressure from damaging the water meter movement. When the ambient temperature rises, the ice melts, reducing the volume of the water and decreasing the pressure inside the meter casing 11. The pressure in the pressure-reducing cavity is gradually released and balanced externally, and the pressure-reducing spring 6 returns to its original position, thereby extending the service life of the water meter.

[0015] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dry freeze-proof water meter, characterized in that The utility model relates to a water meter, which comprises a watchcase (11), a counter box (2), a rectifier plate (7) and an impeller box (9), wherein the middle part of the watchcase (11) is provided with a cavity, and both sides of the watchcase (11) are provided with water inlet and outlet communicating with the cavity; the counter box (2) is arranged on the watchcase (11); the counter (1) is arranged in the counter box (2); the rectifier plate (7) is arranged at the bottom of the counter box (2) and forms a decompression cavity with the counter box (2); the impeller box (9) is arranged at the bottom of the cavity, and the impeller (8) is arranged in the impeller box (9); the impeller shaft of the impeller (8) penetrates through the rectifier plate (7) and is connected with the counter (1); the decompression plate (3) is arranged in the decompression cavity; the decompression plate (3) is in contact with the rectifier plate (7); the decompression spring (6) is arranged between the upper surface of the decompression plate (3) and the counter box (2); and the rectifier plate (7) is provided with a through hole.

2. The dry freeze-proof water meter according to claim 1, characterized in that, The decompression plate (3) is provided with a sealing ring between the counter box (2) and the impeller shaft.

3. The dry freeze-proof water meter according to claim 1, characterized in that, The bottom of the impeller box (9) is open, and the filter screen (10) is arranged on both sides of the bottom.

Images