Water meter liquid seal character wheel box

Abstract

The utility model discloses a water meter liquid seal character wheel box, and belongs to the field of water meters. A rotating shaft is rotationally arranged on a box body, the interior of the box body is divided into a flow guide cavity and a buffer cavity through a partition plate, a sleeve is fixedly connected to the box body, the rotating shaft penetrates through the sleeve and extends into the flow guide cavity, at least one pair of arc-shaped grooves are formed in the inner wall of the sleeve and the outer wall of the rotating shaft, and the rotating shaft is sleeved with a sealing ring. The buffer plate is communicated with the flow guide cavity through a connecting pipe; by means of the effect that the sealing ring is in interference fit with the inner wall of the arc-shaped groove, the connecting stability of the sealing ring is improved, tap water and impurities are prevented from entering the box body, when external water pressure changes suddenly, the buffering cavity can buffer a high-pressure water source, the sealing ring is prevented from deforming due to high pressure, the rotating shaft is prevented from being locked, and the service life of the rotating shaft is prolonged. The ten-cone column can operate normally, so that water flow in the water meter can be metered normally, the phenomenon of low-flow metering is prevented, and the accuracy and the reliability of the water meter are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of water meter technology, and in particular to a water meter liquid seal wheel box. Background Technology

[0002] Household water meters typically consist of a gearbox, gear assembly, clamping plate assembly, and liquid-sealed digit wheel assembly. The liquid-sealed digit wheel assembly is used to transmit water flow information and is usually connected to other components to measure water volume and convert water flow into readable data.

[0003] In the existing technology, the liquid-sealed digit wheel box is one of the core components of a household water meter. The liquid-sealed digit wheel box mainly consists of a box body, a digit wheel (used to display the cumulative water consumption), a sealing ring (to prevent water and impurities from entering), a rotating shaft (connecting the digit wheel to other components), and a filling liquid (such as glycerin or antifreeze, used for sealing and lubrication), thereby ensuring accurate display of water consumption and ensuring long-term stable operation.

[0004] In this design, the shaft on the liquid-sealed digit wheel box is sealed with a sealing ring to ensure that the liquid does not leak. However, when the external water pressure changes suddenly, these sealing rings may deform due to the high pressure, causing the shaft to "lock up" and severely affecting the rotation of the ten-tooth column (the ten-tooth column is a key transmission component in the liquid-sealed digit wheel box of the water meter, mainly used to drive the digit wheel to advance and ensure the accurate accumulation and display of water consumption data). This situation will hinder the normal measurement of water flow, resulting in deviations in the measurement of low flow rates, or even negative values, affecting the accuracy and reliability of the water meter. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art that the rotation of the ten-tooth wheel column is affected when the external water pressure changes suddenly, and to propose a water meter liquid seal wheel box.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A water meter liquid seal wheel box includes a box body with a rotating shaft rotatably mounted on the box body. The box body is divided into a flow guiding cavity and a buffer cavity by a partition. A sleeve is fixedly connected to the box body. The rotating shaft extends through the sleeve into the flow guiding cavity. At least one pair of arc-shaped grooves are formed on the inner wall of the sleeve and the outer wall of the rotating shaft. A sealing ring is fitted on the rotating shaft, and the sealing ring is interference-fitted with the inner wall of the arc-shaped groove. A buffer plate is slidably mounted in the buffer cavity, and the two ends of the buffer plate are in contact with the inner wall of the buffer cavity. The buffer plate is connected to the flow guiding cavity through a connecting pipe.

[0008] To facilitate the fitting of the sealing ring onto the rotating shaft, the sealing ring preferably has a circular cross-section.

[0009] To improve the sealing effect of the sealing ring, the depth of the arc-shaped groove is one-third of the diameter of the sealing ring's cross-section.

[0010] To improve the service life of the sealing ring, preferably, the sealing ring is made of modified polytetrafluoroethylene.

[0011] To facilitate the elastic connection of the buffer plate, preferably, a return spring is fixedly connected to the buffer plate, and the connecting end of the return spring is fixedly connected to the inner wall of the buffer cavity.

[0012] To facilitate the pre-guidance of water entering the box, preferably, a water inlet channel is fixedly connected to the box, and through holes communicating with the buffer cavity are opened on both sides of the water inlet channel.

[0013] In order to allow the water source to move toward both sides of the buffer chamber, preferably, the cross-sectional area of ​​the through hole is one-fifth of the cross-sectional area of ​​the water inlet channel.

[0014] To improve the service life of the connecting tube, it is preferable that the connecting tube is made of silicone.

[0015] To facilitate the guidance of water sources and reduce fluid impact and pressure fluctuations, preferably, the box body is provided with a water outlet, the cross-section of the guide cavity is a funnel-shaped structure that decreases in size from large to small, and the input end of the guide cavity is connected to the output end of the connecting pipe, and the output end of the guide cavity gradually extends to the water outlet.

[0016] Furthermore, a turbine blade is fixedly connected to the circumferential surface of the rotating shaft, and the turbine blade is disposed on one side of the inlet of the guide cavity.

[0017] Compared with the prior art, this utility model provides a water meter liquid seal wheel box, which has the following beneficial effects:

[0018] 1. The water meter's liquid seal wheel box has an arc groove depth set to one-third of the diameter of the sealing ring's cross-section. This depth design helps the sealing ring to fit fully into the groove when compressed, maintaining a good seal and effectively preventing liquid leakage and the intrusion of external impurities.

[0019] 2. The water meter's liquid seal wheel box can effectively absorb the impact force caused by sudden changes in water pressure through the return spring, reducing the pressure on the buffer plate and other components, and reducing water flow impact. When the external water pressure returns to normal, the return spring can reset the buffer plate, ensuring that it quickly returns to its original position to cope with the next impact.

[0020] 3. The water meter's liquid seal wheel box is connected to the buffer chamber through a through hole. The water flow can be dispersed into a larger buffer chamber in a short time. This facilitates the attenuation of pressure fluctuations caused by the sudden influx of water, helps to absorb and disperse the kinetic energy of the water source, and makes the water flow more stable when passing through the connecting pipe.

[0021] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model can improve the connection stability of the sealing ring by utilizing the interference fit between the sealing ring and the inner wall of the arc groove, preventing tap water and impurities from entering the housing, thus improving the durability of the device. When the external water pressure changes suddenly, the buffer chamber can buffer the high-pressure water source, preventing the sealing ring from deforming due to high pressure, preventing the shaft from "locking up", and allowing the ten-tooth wheel column to operate normally. This enables the water flow in the water meter to be measured normally, preventing low flow measurement and ensuring the accuracy and reliability of the water meter. Attached Figure Description

[0022] Figure 1 This is a first-view structural schematic diagram of a water meter liquid seal wheel box proposed in this utility model;

[0023] Figure 2 This is a second-view structural schematic diagram of a water meter liquid seal wheel box proposed in this utility model;

[0024] Figure 3 This is a cross-sectional structural diagram of a water meter liquid seal wheel box proposed in this utility model;

[0025] Figure 4 This is a partial structural diagram of a water meter liquid seal wheel box proposed in this utility model.

[0026] In the diagram: 1. Box body; 2. Shaft; 3. Turbine blade; 4. Sleeve; 5. Sealing ring; 6. Partition plate; 7. Buffer plate; 8. Return spring; 9. Connecting pipe; 10. Slide groove; 11. Water inlet channel; 12. Through hole; 13. Water outlet. Detailed Implementation

[0027] 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.

[0028] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] The liquid-sealed digit wheel box in existing household water meters mainly consists of a box body 1, a digit wheel (used to display the cumulative water consumption), a sealing ring 5 (to prevent moisture and impurities from entering), a rotating shaft 2 (connecting the digit wheel to other components), and a filling liquid (such as glycerin or antifreeze, used for sealing and lubrication). In this design, the hole of the rotating shaft 2 on the liquid-sealed digit wheel box needs to be sealed to ensure that the liquid does not leak. However, when the external water pressure changes suddenly, these sealing rings 5 ​​may deform due to the high pressure, causing the rotating shaft 2 to "lock up," which seriously affects the rotation of the ten-tooth column. The ten-tooth column is a key transmission component in the liquid-sealed digit wheel box of the water meter, mainly used to drive the digit wheel to advance and ensure the accurate accumulation and display of water consumption data.

[0030] Example:

[0031] Reference Figures 1-4 A water meter liquid seal dial wheel box includes a box body 1, which is integrally installed inside the water meter body. An inlet pipe and an outlet pipe are connected to the water meter body for water flow. Inside the box body 1 are a dial wheel (for displaying cumulative water consumption), a sealing ring 5 (to prevent moisture and impurities from entering), a rotating shaft 2 (connecting the dial wheel to other components), and a filling liquid (such as glycerin or antifreeze for sealing and lubrication). The rotating shaft 2 is rotatably connected to the box body 1. A turbine blade 3 is also provided at the bottom of the rotating shaft 2. When the turbine blade 3 rotates, the rotating shaft 2 drives the dial wheel to rotate via a plastic gear, thus displaying the cumulative water consumption. This design facilitates the adjustment of the water pressure in the tap water pipe. The buffer is formed by separating the flow guiding cavity and the buffer cavity in the box body 1 by the partition 6. The sleeve 4 is fixedly connected to the box body 1. The sleeve 4 is mainly used to install the rotating shaft 2. The rotating shaft 2 extends through the sleeve 4 into the flow guiding cavity. At least one pair of arc-shaped grooves are opened on the inner wall of the sleeve 4 and the outer wall of the rotating shaft 2. A sealing ring 5 is fitted on the rotating shaft 2. The sealing ring 5 is interference-fitted with the inner wall of the arc-shaped groove, so that the sealing ring 5 can be connected in the arc-shaped groove to seal the sleeve 4 and prevent moisture and impurities from entering the box body 1. A buffer plate 7 is slidably arranged in the buffer cavity. The two ends of the buffer plate 7 are in contact with the inner wall of the buffer cavity. The buffer plate 7 is connected to the flow guiding cavity through the silicone connecting tube 9.

[0032] The above solution, by introducing the inlet of the tap water pipe into the buffer chamber of the housing 1, helps to reduce the impact of water pressure fluctuations on the sealing ring 5, improves the stability of the housing 1 under high-pressure impact conditions of sudden water pressure changes, and reduces the impact effect on the sealing ring 5 on the rotating shaft 2. At the same time, by utilizing the interference fit between the sealing ring 5 and the inner wall of the arc groove, the connection stability of the sealing ring 5 can be improved, preventing tap water and impurities from entering the housing 1, thus improving the durability of the device. When the external water pressure changes suddenly, the buffer chamber can buffer the high-pressure water source, preventing the sealing ring 5 from deforming due to high pressure, preventing the rotating shaft 2 from "locking up", and allowing its ten-toothed column to operate normally. In this way, the water flow in the water meter can be measured normally, preventing the phenomenon of low flow measurement deviation, and ensuring the accuracy and reliability of the water meter.

[0033] To improve the sealing effect of the sealing ring 5, the cross-section of the sealing ring 5 is circular, and the depth of the arc groove is one-third of the diameter of the cross-section of the sealing ring 5. This ensures that a uniform contact surface can be formed during installation, thereby enhancing the sealing performance. In addition, the depth of the arc groove is set to one-third of the diameter of the cross-section of the sealing ring 5. This depth design helps the sealing ring 5 to fully fit into the groove when compressed, maintain a good sealing state, and effectively prevent liquid leakage and the intrusion of external impurities. Through this design, the sealing ring 5 can more effectively cope with hydraulic changes, improving the reliability and durability of the device.

[0034] The sealing ring 5 is made of modified polytetrafluoroethylene (PTFE). Modified PTFE can withstand a variety of chemicals, including acids, alkalis and organic solvents, ensuring the effectiveness of the sealing ring 5 in various environments, making it less susceptible to corrosion and extending its service life.

[0035] To enable the buffer plate 7 to cope with sudden changes in external water pressure, a return spring 8 is fixedly connected to the buffer plate 7. The connecting end of the return spring 8 is fixedly connected to the inner wall of the buffer cavity. A sliding groove 10 is also provided on the inner wall of the buffer cavity, and the two ends of the buffer plate 7 are slidably connected to the sliding groove 10 to limit its position. The return spring 8 can effectively absorb the impact force caused by sudden changes in water pressure, reduce the pressure on the buffer plate 7 and other components, and reduce the impact of water flow. When the external water pressure returns to normal, the return spring 8 can reset the buffer plate 7 to ensure that it quickly returns to its original position in order to cope with the next impact.

[0036] A water inlet channel 11 is fixedly connected to the housing 1. Through holes 12 connected to the buffer chamber are opened on both sides of the water inlet channel 11. The cross-sectional area of ​​the through holes 12 is one-fifth of the cross-sectional area of ​​the water inlet channel 11. The smaller cross-sectional area of ​​the through holes 12 (one-fifth of the water inlet channel 11) can effectively control the water flow rate into the buffer chamber, avoid excessive impact on the buffer plate 7 due to excessive water flow speed, and better regulate the pressure and speed of the fluid entering the buffer chamber, thereby preventing damage to the buffer plate 7 due to water flow impact.

[0037] Through the connection between the through hole 12 and the buffer chamber, the water flow can be dispersed into a larger buffer chamber in a short time. This facilitates the attenuation of pressure fluctuations caused by the sudden influx of water, helps to absorb and disperse the kinetic energy of the water source, and makes the water flow more stable when passing through the connecting pipe 9.

[0038] The housing 1 has an outlet 13. The cross-section of the flow guide cavity is a funnel-shaped structure that gradually decreases in size. The inlet of the flow guide cavity is connected to the outlet of the connecting pipe 9. The outlet of the flow guide cavity gradually extends to the outlet 13. A turbine blade 3 is fixedly connected to the circumference of the rotating shaft 2. The turbine blade 3 is located on one side of the inlet of the flow guide cavity. The funnel-shaped design can accelerate the water flow in the flow guide cavity, thereby reducing the resistance of the water flow when passing through this area. This design not only allows the water flow to flow smoothly, but also improves the flow rate and stability of the water flow. Furthermore, the flow guide cavity design that gradually decreases in size helps to smoothly transition the water flow. The kinetic energy generated by the water flow can drive the turbine blade 3 on the rotating shaft 2 to rotate, thereby achieving the effect of displaying the cumulative water consumption.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A water meter liquid seal dial box, comprising a box body (1), a rotating shaft (2) is arranged on the box body (1), characterized in that, The box (1) is divided into a flow guide cavity and a buffer cavity by a partition (6), Wherein, the sleeve (4) is fixedly connected to the box (1), the rotating shaft (2) extends through the sleeve (4) to the flow guide cavity, at least one pair of arc-shaped grooves are formed in the inner wall of the sleeve (4) and the outer wall of the rotating shaft (2), the sealing ring (5) is sleeved on the rotating shaft (2), the sealing ring (5) is in interference fit with the inner wall of the arc-shaped groove, the buffer plate (7) is slidably arranged in the buffer cavity, the two ends of the buffer plate (7) are in close contact with the inner wall of the buffer cavity, and the buffer plate (7) is connected with the flow guide cavity through the connecting pipe (9).

2. A water meter liquid seal dial cover according to claim 1, wherein, The cross section of the sealing ring (5) is circular.

3. A water meter liquid seal dial cover according to claim 2, wherein, The depth of the arc-shaped groove is one third of the diameter of the cross section of the sealing ring (5).

4. A water meter seal wheel cartridge according to any one of claims 1 to 3, wherein, The material of the sealing ring (5) is modified polytetrafluoroethylene.

5. A water meter liquid seal dial cover according to claim 1, wherein, The reset spring (8) is fixedly connected to the buffer plate (7), and the connecting end of the reset spring (8) is fixedly connected with the inner wall of the buffer cavity.

6. A water meter capsule according to claim 5, wherein, The water inlet channel (11) is fixedly connected to the box (1), and the through holes (12) are formed in the two sides of the water inlet channel (11) and are in communication with the buffer cavity.

7. A water meter liquid seal dial cover according to claim 6, wherein, The cross-sectional area of the through hole (12) is one fifth of the cross-sectional area of the water inlet channel (11).

8. A water meter capsule according to claim 1, wherein, The material of the connecting pipe (9) is silica gel.

9. A water meter seal wheel cartridge according to claim 8, wherein, The water outlet (13) is formed in the box (1), the cross section of the flow guide cavity is a horn-shaped structure gradually decreasing from large to small, the input end of the flow guide cavity is in communication with the output end of the connecting pipe (9), and the output end of the flow guide cavity gradually extends to the water outlet (13).

10. A water meter capsule according to claim 9, wherein, The turbine blade (3) is fixedly connected to the circumferential surface of the rotating shaft (2), and the turbine blade (3) is arranged on one side of the input end of the flow guide cavity.

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