A rotary anti-backflow water meter

Abstract

This utility model belongs to the field of water meter technology, specifically a rotary anti-backflow water meter, including a meter casing. A rotating shaft is rotatably connected to the middle of the casing, and an impeller is fixedly connected to the outer wall of the rotating shaft. An inlet pipe and a one-way pipe are fixedly connected to both ends of the casing, respectively. The one-way pipe includes a straight pipe and an expansion pipe. The straight pipe is fixedly connected to the casing, and an outlet pipe is fixedly connected to the end of the expansion pipe away from the straight pipe. A mounting plate is fixedly connected to the inner wall of the straight pipe opening. Multiple slots are formed on the mounting plate, and perforated plates are fixedly connected to the slots. Through the combined action of the one-way pipe, mounting plate, perforated plate, sliding rod, pressure plate, spring, and circular plate, this utility model enables the water meter to be reversed. Water pressure presses the pressure plate, causing it to press against the perforated plate, preventing water flow through the meter and thus stopping the water supply.

Description

Technical Field

[0001] This utility model belongs to the field of water meter technology, specifically a rotary anti-backflow water meter. Background Technology

[0002] A water meter is an instrument used to measure water flow, typically the cumulative flow. Water meters are generally classified into two types: volumetric water meters and velocity water meters. The casing of a water meter is usually marked with the direction of water flow. When the water meter is installed in this direction, the counter pointer rotates clockwise, counting correctly. If the water meter is installed backwards, the counter pointer rotates in reverse, and the counter counts backwards.

[0003] In practice, some users will reverse the water meter between two meter readings to make the meter reading smaller, thus paying less water bill. Summary of the Invention

[0004] The purpose of this utility model is to provide a rotary anti-backflow water meter, which has the function of preventing the reading from decreasing when the water meter is installed backwards.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rotary anti-backflow water meter is provided, comprising a casing, a rotating shaft rotatably connected to the middle of the casing, an impeller fixedly connected to the outer wall of the rotating shaft, an inlet pipe and a one-way pipe fixedly connected to both ends of the casing, the one-way pipe comprising a straight pipe and an expansion pipe, the straight pipe fixedly connected to the casing, an outlet pipe fixedly connected to the end of the expansion pipe away from the straight pipe, an mounting plate fixedly connected to the inner wall of the straight pipe opening, multiple slots opened on the mounting plate, a perforated plate fixedly connected to each slot, a sliding rod slidably connected to the middle of the mounting plate, a pressure plate and a circular plate fixedly connected to both ends of the sliding rod, a spring fixedly connected between the mounting plate and the circular plate, an installation groove opened on the inner wall of the casing, a locking block slidably connected to the installation groove, and a spring fixedly connected between the locking block and the installation groove.

[0006] Optionally, the inner diameter of the straight pipe is larger than the inner diameter of the outlet pipe, and the pressure plate is disposed inside the expansion pipe.

[0007] Optionally, the spring is fitted onto the outer end of the slide rod, and the pressure plate is made of rubber.

[0008] Optionally, multiple mounting slots are provided, the number of the locking blocks is equal to the number of mounting slots, and the multiple locking blocks are evenly distributed on the inner wall of the case.

[0009] Optionally, all of the card blocks are made of a trapezoidal structure, and the inclined structure of the card blocks protrudes from the mounting groove.

[0010] Optionally, multiple perforated plates are provided, and the multiple perforated plates are evenly distributed on the mounting plate.

[0011] Optionally, the blades of the impeller are fitted to the inner wall of the casing, and the outer wall of the locking block located in the mounting groove is slidably fitted to the inner wall of the mounting groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model, through the cooperation of a one-way pipe, mounting plate, mesh plate, sliding rod, pressure plate, spring and circular plate, can use water pressure to press the pressure plate when the water meter is installed in reverse, so that it is pressed against the mesh plate, preventing water from flowing through the water meter, thereby achieving the purpose of stopping the water supply.

[0014] 2. This utility model, through the cooperation of the mounting groove, the locking block and the second spring, when the one-way pipe is deliberately cut off and the water flow is reversed into the meter housing, uses the locking block to block the impeller and stop it from rotating, thereby preventing the water meter reading from becoming smaller. At the same time, it can reduce the amount of water flowing through the water meter, thereby further preventing the water meter from being installed in reverse intentionally or unintentionally. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0018] Figure 3 for Figure 2 Enlarged structural diagram at point A;

[0019] Figure 4 This is a schematic diagram of the internal front view structure of this utility model.

[0020] In the diagram: 1. Case; 2. Shaft; 3. Impeller; 4. Inlet pipe; 5. One-way pipe; 501. Straight pipe; 502. Expansion pipe; 6. Outlet pipe; 7. Mounting plate; 8. Mesh plate; 9. Slide rod; 10. Pressure plate; 11. Spring 1; 12. Round plate; 13. Mounting groove; 14. Locking block; 15. Spring 2. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Reference Figure 1-4The present invention provides a rotary anti-backflow water meter according to an embodiment of the present invention. A rotary anti-backflow water meter includes a housing 1, a rotating shaft 2 rotatably connected to the middle of the housing 1, an impeller 3 fixedly connected to the outer wall of the rotating shaft 2, an inlet pipe 4 and a one-way pipe 5 fixedly connected to both ends of the housing 1, the one-way pipe 5 including a straight pipe 501 and an expansion pipe 502, the straight pipe 501 fixedly connected to the housing 1, and an outlet pipe 6 fixedly connected to the end of the expansion pipe 502 away from the straight pipe 501, an mounting plate 7 fixedly connected to the inner wall of the opening of the straight pipe 501, the mounting plate 7 having multiple slots, a mesh plate 8 fixedly connected to each slot, and a sliding rod 9 slidably connected to the middle of the mounting plate 7, the two ends of the sliding rod 9 being fixedly connected to... There is a pressure plate 10 and a round plate 12. A spring 11 is fixedly connected between the mounting plate 7 and the round plate 12. When water flows from the inside of the meter housing 1 into the one-way pipe 5, the pressure plate 10 is pushed open under the action of water pressure. Then the water flows through the mesh plate 8 through the gap between the expansion pipe 502 and the pressure plate 10. When the water meter is reversed, when the water flows from the outlet pipe 6 into the one-way pipe 5, the pressure plate 10 will be pressed against the surface of the mesh plate 8, thereby preventing water from entering the meter housing 1. An installation groove 13 is provided on the inner wall of the meter housing 1. A locking block 14 is slidably connected in the installation groove 13. A spring 15 is fixedly connected between the locking block 14 and the installation groove 13.

[0026] The present invention provides a rotary anti-backflow water meter, which, compared with the prior art, can block the water flow when the water meter is installed in reverse through the one-way tube 5 structure, or can still reduce the water flow through the water meter when the one-way tube 5 is cut off and installed in reverse.

[0027] In another embodiment of this utility model, please refer to Figures 2 to 4 The inner diameter of the straight pipe 501 is larger than the inner diameter of the outlet pipe 6. The pressure plate 10 is set inside the expansion pipe 502. The larger pipe diameter can reduce the resistance when water flows through the one-way pipe 5. The pressure plate 10 is set inside the arc-shaped pipe section of the expansion pipe 502, which can ensure that the water flows out between the pressure plate 10 and the inner wall of the expansion pipe 502 as much as possible, and reduce the resistance of the pressure plate 10 to the water flow.

[0028] In another embodiment of this utility model, please refer to Figure 2 and Figure 3 Spring 11 is sleeved on the outer end of slide rod 9. Pressure plate 10 is made of rubber to improve the sealing performance of pressure plate 10 pressed against the outer wall of mounting plate 7. There are multiple mesh plates 8, and the multiple mesh plates 8 are evenly distributed on mounting plate 7. The total side surface area of ​​the multiple mesh plates 8 is not less than the opening side area of ​​water outlet pipe 6.

[0029] In another embodiment of this utility model, please refer to Figures 2 to 4The mounting slot 13 is provided with multiple slots, and the number of locking blocks 14 is equal to that of the mounting slot 13. The multiple locking blocks 14 are evenly distributed on the inner wall of the casing 1. The multiple locking blocks 14 are all made of trapezoidal structure, and the inclined structure of the locking block 14 protrudes from the mounting slot 13. When the impeller 3 rotates clockwise, the impeller 3 can press the inclined surface of the locking block 14, so that it can automatically enter the mounting slot 13.

[0030] In another embodiment of this utility model, please refer to Figure 2 and Figure 4 The blades of the impeller 3 are fitted to the inner wall of the casing 1, and the outer wall of the locking block 14 is slidably fitted to the inner wall of the mounting groove 13 within the mounting groove 13, ensuring the stability of the locking block 14 when it moves relative to the mounting groove 13.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rotary backflow-preventing water meter, comprising a meter shell (1), a rotating shaft (2) is rotatably connected to the middle of the meter shell (1), and an impeller (3) is fixedly connected to the outer wall of the rotating shaft (2), characterized in that: The two ends of the watch case (1) are respectively fixedly connected to a water inlet pipe (4) and a one-way pipe (5). The one-way pipe (5) includes a straight pipe (501) and an expansion pipe (502). The straight pipe (501) is fixedly connected to the watch case (1). The end of the expansion pipe (502) away from the straight pipe (501) is fixedly connected to a water outlet pipe (6). An installation plate (7) is fixedly connected to the inner wall of the pipe opening of the straight pipe (501). The installation plate (7) has multiple slots. The slots are fixedly connected to... There is a perforated plate (8), and a sliding rod (9) is slidably connected to the middle of the mounting plate (7). A pressure plate (10) and a round plate (12) are fixedly connected to both ends of the sliding rod (9). A spring (11) is fixedly connected between the mounting plate (7) and the round plate (12). An installation groove (13) is provided on the inner wall of the case (1). A locking block (14) is slidably connected in the installation groove (13). A spring (15) is fixedly connected between the locking block (14) and the installation groove (13).

2. A reverse flow preventing water meter of the type defined in claim 1, characterised in that: The inner diameter of the straight pipe (501) is larger than the inner diameter of the outlet pipe (6), and the pressure plate (10) is installed inside the expansion pipe (502).

3. The rotary anti-backflow water meter as described in claim 1, characterized in that: The spring (11) is sleeved on the outer end of the slide bar (9), and the pressure plate (10) is made of rubber.

4. A reverse flow preventing water meter of the type defined in claim 1, characterized in that: The mounting slot (13) is provided in multiple ways, and the number of the locking blocks (14) is equal to that of the mounting slot (13), and the multiple locking blocks (14) are evenly distributed on the inner wall of the case (1).

5. A reverse flow preventing water meter of the type defined in claim 1, characterized in that: The multiple card blocks (14) are all made of trapezoidal structure, and the inclined structure of the card blocks (14) protrudes from the mounting groove (13).

6. A reverse flow preventing water meter of the type defined in claim 1, characterized in that: There are multiple perforated plates (8), and the multiple perforated plates (8) are evenly distributed on the mounting plate (7).

7. A reverse flow preventing water meter of the type defined in claim 1, characterized in that: The blades of the impeller (3) are fitted to the inner wall of the casing (1), and the outer wall of the block (14) located in the mounting groove (13) is slidably fitted to the inner wall of the mounting groove (13).

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