Electromagnetic water meter with automatic calibration function and circuit thereof

Abstract

The utility model discloses an electromagnetic water meter with an automatic calibration function and a circuit thereof, and relates to the technical field of water meters, the electromagnetic water meter comprises a supporting assembly, and the supporting assembly comprises a water pipe, a shell, a battery and a circuit body; the device further comprises a cushioning assembly. Each cushioning assembly comprises a fixed ring, a connecting ring, a supporting rod, a sliding ring, a movable rod and a spring. The fixing rings are fixedly connected to two ends of the water pipe; the sliding ring is a circular ring, is connected to the water pipe in a sliding manner, and is positioned between the fixed rings; a connecting ring is fixed on the sliding ring, and a supporting rod is welded and fixed on the connecting ring; the top of the supporting rod is fixed to the bottom of the shell. A plurality of movable rods are fixed to the sliding ring, and a plurality of grooves are formed in the side, facing the sliding ring, of the fixed ring; the movable rod is connected into the groove in the fixed ring in a sliding manner; one end of the spring is fixed in the groove on the fixed ring, and the other end of the spring is fixed on the movable rod; shock waves generated by the water hammer effect can be absorbed, and the electromagnetic water meter is prevented from being damaged by vibration generated by a water conveying pipeline.

Description

Technical Field

[0001] This utility model relates to the field of water meter technology, and in particular to an electromagnetic water meter with automatic calibration function and its circuit. Background Technology

[0002] Electromagnetic water meters are instruments that use the principle of electromagnetic induction to measure water flow based on the induced electromotive force generated when water flows through an external magnetic field. They are mainly used for measuring domestic water consumption and can improve the accuracy of water measurement, giving them a significant advantage in domestic water consumption measurement.

[0003] When the valves in a water pipeline are opened or closed, a water hammer effect is generated. The shock waves generated by the water hammer effect cause the pipeline to vibrate. Since the electromagnetic water meter is fixed on the water pipeline, the shock waves generated by the water hammer effect will be transmitted to the electromagnetic water meter through the pipeline, causing damage to the electromagnetic water meter and affecting its normal operation. Utility Model Content

[0004] This application provides an electromagnetic water meter and its circuit with automatic calibration function, which solves the problem in the prior art where the water hammer effect generated when the valve is opened or closed causes vibration in the pipeline. The electromagnetic water meter is fixed on the water pipeline, and the shock wave generated by the water hammer effect is transmitted to the electromagnetic water meter through the pipeline, causing damage to the electromagnetic water meter and affecting its normal operation. The solution achieves absorption of the shock wave generated when the water hammer effect occurs, avoiding damage to the electromagnetic water meter caused by the vibration generated by the water pipeline, and ensuring that the electromagnetic water meter can operate normally.

[0005] This application provides an electromagnetic water meter with automatic calibration function, including a support assembly. The support assembly includes a water pipe, a housing, a battery, and a circuit body, with the battery and circuit body placed inside the housing.

[0006] It also includes shock absorption components;

[0007] The shock-absorbing assembly includes a fixed ring, a connecting ring, a support rod, a sliding ring, a movable rod, and a spring;

[0008] The fixing rings are fixedly connected to both ends of the water pipe;

[0009] The sliding ring consists of two circular rings, which are slidably connected to the water pipe and located between the fixed rings.

[0010] The connecting ring is fixed to the sliding ring, and a support rod is welded and fixed to the connecting ring;

[0011] The top of the support rod is fixed to the bottom of the outer casing;

[0012] Multiple movable rods are fixed on the sliding ring, and multiple grooves are opened on the side of the fixed ring facing the sliding ring;

[0013] The movable rod is slidably connected to the groove on the fixed ring;

[0014] One end of the spring is fixed in a groove on the fixed ring, and the other end of the spring is fixed on the movable rod.

[0015] Furthermore, multiple guide rails are fixed on the water pipe;

[0016] The guide rail is a rectangular rod;

[0017] The guide rail and the fixed ring are fitted together on the side near the sliding ring;

[0018] The sliding ring has multiple rectangular grooves evenly distributed on its inner side, and the sliding ring is slidably connected to the guide rail.

[0019] Furthermore, an opening is provided at the top of the outer casing, and a sealing cap is fixed to the opening at the top of the outer casing;

[0020] An observation window is provided on the closed cover, and a transparent plastic plate is fixed on the observation window;

[0021] The observation window is located on the upper side of the circuit body;

[0022] The sealing cover is fixed to the top of the outer shell by bolts, and a rubber gasket is fixed at the connection between the sealing cover and the outer shell.

[0023] Furthermore, a partition is fixed inside the outer shell;

[0024] The partition is a rectangular plate, which divides the outer shell into two chambers;

[0025] The main circuit and the battery are located on opposite sides of the partition.

[0026] Furthermore, the connecting ring consists of two semi-circular rings;

[0027] The connecting rings are fixed together by bolts;

[0028] The sliding ring is a rubber ring, and the inner side of the connecting ring is in contact with the sliding ring.

[0029] Furthermore, a connecting plate is fixed to the top of the support rod, and the connecting plate is a rectangular plate;

[0030] The connecting plate is welded and fixed to the top of the support rod;

[0031] The connecting plate has multiple threaded holes, and the connecting plate is used to fix the support rod and the outer shell together with bolts.

[0032] Furthermore, connector pipes are fixedly connected to both ends of the water pipe;

[0033] The connector pipe is used to fix the water pipe to the pipeline with bolts, and a rubber gasket is fixed at the connection between the connector pipe and the pipeline;

[0034] A limiting ring is fixed on the water pipe, and the limiting ring is located between the sliding rings;

[0035] The limiting ring is fitted to the side wall of the guide rail.

[0036] Furthermore, the main body of the circuit can adopt an active or passive two-wire operating mode;

[0037] When the main body of the circuit adopts active working mode, it is powered by a battery water meter with a power supply of 10V-24V, and outputs as a two-wire system through IOUT+ and common ground.

[0038] When the main body of the circuit adopts a passive working mode, the IVCC power supply and the IOUT+ pin two-wire output are provided by the external device in the subsequent stage.

[0039] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0040] The circuit body and battery are fixed to the water pipe by a sliding ring. Vibration is transmitted from the water pipe to the electromagnetic water meter. The relative displacement between the sliding ring and the water pipe will occur. The spring located in the fixed ring absorbs the vibration generated by the impact. This effectively solves the problem in the existing technology where the water hammer effect generated when the valve is opened or closed will cause the pipe to vibrate. The shock wave generated by the water hammer effect will be transmitted to the electromagnetic water meter through the pipe and damage the electromagnetic water meter. In this way, the shock wave generated by the water hammer effect is absorbed, avoiding the vibration generated by the water pipe from damaging the electromagnetic water meter and ensuring that the electromagnetic water meter can operate normally. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the overall structure of an electromagnetic water meter with automatic calibration function and its circuit according to the present invention.

[0042] Figure 2 This utility model relates to an electromagnetic water meter with automatic calibration function and its circuit. Figure 1 Front view structural diagram;

[0043] Figure 3 This utility model relates to an electromagnetic water meter with automatic calibration function and its circuit. Figure 1 A schematic diagram of the side view structure;

[0044] Figure 4 This is a schematic cross-sectional view of the overall structure of an electromagnetic water meter with automatic calibration function and its circuit according to the present invention.

[0045] Figure 5This is a schematic diagram of the connection relationship between the fixed ring and the sliding ring of an electromagnetic water meter with automatic calibration function and its circuit according to the present invention.

[0046] Figure 6 This is a schematic diagram of the connection relationship between the sliding ring and the water pipe of an electromagnetic water meter with automatic calibration function and its circuit according to this utility model.

[0047] Figure 7 This is a schematic diagram of the circuit structure of an electromagnetic water meter with automatic calibration function according to this utility model.

[0048] In the diagram: 100, Support assembly; 101, Water pipe; 102, Connector pipe; 103, Connecting plate; 104, Outer shell; 105, Sealing cover; 106, Observation window; 107, Battery; 108, Circuit board; 109, Partition.

[0049] 200. Shock-absorbing component; 201. Fixed ring; 202. Connecting ring; 203. Support rod; 204. Sliding ring; 205. Movable rod; 206. Spring; 207. Guide rail; 208. Limiting ring. Detailed Implementation

[0050] To facilitate understanding of this utility model, a more comprehensive description of this application will be given below with reference to the accompanying drawings, which show preferred embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this utility model.

[0051] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0053] like Figures 1 to 5As shown, this application proposes an electromagnetic water meter and its circuit with automatic calibration function, including a support assembly 100, which includes a water pipe 101, a housing 104, a battery 107, and a circuit body 108, with the battery 107 and circuit body 108 placed inside the housing 104; it also includes a shock-absorbing assembly 200, which includes a fixed ring 201, a connecting ring 202, a support rod 203, a sliding ring 204, a movable rod 205, and a spring 206; the fixed ring 201 is fixedly connected to both ends of the water pipe 101; the sliding ring 204 consists of two circular rings, which are slidably connected to the water pipe 101 and located between the fixed rings 201; the connecting ring 202 is fixed to the sliding ring 204, and the connecting ring 202 is fixed to the sliding ring 204. A support rod 203 is welded and fixed to the top of the housing 104; the top of the support rod 203 is fixed to the bottom of the housing 104, and the support rod 203 can fix the housing 104 to the water pipe 101; multiple movable rods 205 are fixed on the sliding ring 204, and multiple grooves are opened on the side of the fixed ring 201 facing the sliding ring 204; the movable rods 205 extend into the grooves on the fixed ring 201, and the movable rods 205 are slidably fixed in the grooves on the fixed ring 201; one end of the spring 206 is fixed in the groove on the fixed ring 201, and the other end of the spring 206 is fixed to the movable rod 205. When the impact generated by the water hammer effect is transmitted to the water pipe 101, it will cause relative displacement between the water pipe 101 and the sliding ring 204, and the spring 206 can absorb most of the impact force.

[0054] Preferably, multiple guide rails 207 are fixed on the water pipe 101, and the guide rails 207 are distributed around the side wall of the water pipe 101; the guide rails 207 are rectangular rods; the guide rails 207 and the fixed ring 201 are attached to the side near the sliding ring 204; multiple rectangular grooves are evenly distributed on the inner side of the sliding ring 204, and the sliding ring 204 is slidably connected to the guide rails 207. When the electromagnetic water meter is impacted, the sliding ring 204 slides slightly on the guide rails 207.

[0055] Preferably, the side wall of the fixing ring 201 has 6 to 8 grooves, and a spring 206 is fixed in each groove. When the spring 206 is subjected to impact, it absorbs most of the impact force.

[0056] Preferably, the top of the outer casing 104 has an opening, and a sealing cover 105 is fixed to the opening at the top of the outer casing 104; an observation window 106 is provided on the sealing cover 105, and a transparent plastic plate is fixed on the observation window 106, through which the value on the water meter is observed; the observation window 106 is located on the upper side of the circuit body 108; the sealing cover 105 is fixed to the top of the outer casing 104 by bolts, and a rubber pad is placed at the connection between the sealing cover 105 and the outer casing 104. The rubber pad serves a waterproof function, which can prevent water from entering the outer casing 104 from the connection between the sealing cover 105 and the outer casing 104.

[0057] Preferably, the circuit body 108 has a display screen for displaying water consumption, and the position of the display screen is aligned with the position of the observation window 106 on the closed cover 105, which facilitates the statistics of water consumption.

[0058] Preferably, a partition 109 is fixed inside the outer casing 104; the partition 109 is a rectangular plate made of insulating resin, and the partition 109 divides the outer casing 104 into two chambers, which are used to house the battery 107 and the circuit body 108, respectively; the circuit body 108 and the battery 107 are located on both sides of the partition 109, and the battery 107 is used to supply power to the circuit body 108, and the battery 107 is connected to the circuit body 108 through wires.

[0059] Preferably, the battery 107 is a lithium battery, the circuit body 108 is a circuit board with a measurement circuit, the circuit body 108 includes a storage module that can store the measurement values ​​of the electromagnetic water meter, and the circuit body 108 can control the power supply mode of the electromagnetic water meter.

[0060] Preferably, the connecting ring 202 consists of two semi-circular rings; the connecting ring 202 is fixed together by bolts; the sliding ring 204 is a rubber ring, and the inner side of the connecting ring 202 and the sliding ring 204 are in contact.

[0061] Preferably, the sliding ring 204 is made of elastic rubber. When the connecting ring 202 is fixed on the sliding ring 204, the connecting ring 202 can squeeze and deform the sliding ring 204, which can prevent the connecting ring 202 from falling off the sliding ring 204 when it is impacted.

[0062] Preferably, a connecting plate 103 is fixed to the top of the support rod 203. The connecting plate 103 is a rectangular plate. The connecting plate 103 is welded and fixed to the top of the support rod 203. Multiple threaded holes are provided on the connecting plate 103. The connecting plate 103 fixes the support rod 203 and the outer shell 104 to the connecting rod 203 by bolts. When the battery 107 or the circuit body 108 needs to be repaired or replaced, the outer shell 104 can be easily removed from the water pipe 101.

[0063] Preferably, the water pipe 101 is fixedly connected to the two ends of the connector pipe 102; the connector pipe 102 fixes the water pipe 101 to the pipe with bolts, and an annular rubber gasket is placed at the connection between the connector pipe 102 and the pipe to seal the connection between the connector pipe 102 and the pipe, thereby preventing water leakage at the connection between the water pipe 101 and the pipe.

[0064] Preferably, a limiting ring 208 is fixed on the water pipe 101, and the limiting ring 208 is located between the sliding rings 204; the limiting ring 208 is in contact with the side wall of the guide rail 207, and the limiting ring 208 is used to limit the movement range of the sliding rings 204.

[0065] Preferred, such as Figure 7As shown, the electromagnetic water meter converts the digital value of the flow rate into a 4mA-20mA analog output. It outputs a 1KHz PWM rectangular wave with adjustable duty cycle through the MCU's IO pin. The PWM wave is connected to the input pin of the magnetic isolation device ADUM1201 through resistor R1, and after magnetic isolation, it is connected to the input pin of the inverter SN7414 through resistor R2. The inverter shapes the PWM wave into a rectangular wave with a 2.5V amplitude. After passing through two-stage low-pass filters (resistor R3 and capacitor C1, and resistor R4 and capacitor C2), the signal is input to voltage follower U5_1. The output of voltage follower U5_1 is input to the positive input of comparator U5_2 through resistor R11. The negative input of comparator U5_2 is grounded. The comparator controls the output current of transistor Q1 (4mA-20mA) by dividing the output voltage of voltage follower U5_1 by the current value of resistor R11. In the circuit, U4 provides a 3.3V regulated output for Zener diode, and U3 provides a 2.5V regulated power supply for high-precision voltage regulator chip TL431.

[0066] Preferred, such as Figure 7 As shown, the main circuit 108 can operate in either an active or passive two-wire mode. When the main circuit 108 operates in an active mode, the battery 107 provides 10V-24V power to the water meter, and the output is a two-wire system via IOUT+ and the common ground. When the main circuit 108 operates in a passive mode, the external device provides IVCC power, and the output is a two-wire system via the IOUT+ pin. The circuit has an automatic calibration mode. During calibration, the power supply is switched to the internal power supply of the electromagnetic water meter via switch U6_1, and the current output is switched to the standard sampling resistor R10 via switch U6_2. The MCU achieves multi-point calibration by adjusting the PWM duty cycle and the reference voltage value collected by the ADC. After calibration, the calibration value is stored in the EEPROM.

[0067] An electromagnetic water meter and its circuit with automatic calibration function according to an embodiment of this application are used in practical applications as follows:

[0068] When water hammer occurs in the water pipe 101, the vibration generated by the water hammer is transmitted to the electromagnetic water meter through the water pipe 101. The vibration causes relative sliding between the sliding ring 204 on the water pipe 101 and the water pipe 101. The outer shell 104 is fixed to the sliding ring 204 by the connecting ring 202. The movable rod 205 fixed to the sliding ring 204 slides in the groove on the fixed ring 201. The spring 206 located in the groove of the fixed ring 201 absorbs the vibration. This effectively solves the problem in the prior art where the water hammer effect generated when the valve is opened or closed causes the pipe to vibrate, and the shock wave generated by the water hammer effect is transmitted to the electromagnetic water meter through the pipe, causing damage to the electromagnetic water meter. This technology absorbs the shock wave generated by the water hammer effect, avoids the vibration generated by the water pipe 101 from damaging the electromagnetic water meter, and ensures that the electromagnetic water meter can operate normally.

[0069] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, various modifications and variations are possible with this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electromagnetic water meter with automatic calibration function, comprising a support assembly (100), the support assembly (100) comprising a water pipe (101), a housing (104), a battery (107) and a circuit body (108), the battery (107) and the circuit body (108) being placed inside the housing (104); Its features are, It also includes a shock-absorbing component (200); The shock-absorbing assembly (200) includes a fixed ring (201), a connecting ring (202), a support rod (203), a sliding ring (204), a movable rod (205), and a spring (206). The fixing rings (201) are fixedly connected to both ends of the water pipe (101); The sliding ring (204) consists of two circular rings, which are slidably connected to the water pipe (101) and are located between the fixed rings (201). The connecting ring (202) is fixed on the sliding ring (204), and a support rod (203) is welded and fixed on the connecting ring (202). The top of the support rod (203) is fixed to the bottom of the outer casing (104); Multiple movable rods (205) are fixed on the sliding ring (204), and multiple grooves are provided on the side of the fixed ring (201) facing the sliding ring (204); The movable rod (205) is slidably connected to the groove on the fixed ring (201); One end of the spring (206) is fixed in the groove on the fixed ring (201), and the other end of the spring (206) is fixed on the movable rod (205).

2. An electromagnetic water meter with automatic calibration function as described in claim 1, characterized in that, Multiple guide rails (207) are fixed on the water pipe (101); The guide rail (207) is a rectangular rod; The guide rail (207) and the fixing ring (201) are attached to the side of the sliding ring (204); The sliding ring (204) has multiple rectangular grooves evenly distributed on its inner side, and the sliding ring (204) is slidably connected to the guide rail (207).

3. An electromagnetic water meter with automatic calibration function as described in claim 1, characterized in that, The top of the outer casing (104) is provided with an opening, and a closing cover (105) is fixed to the top opening of the outer casing (104). An observation window (106) is provided on the closed cover (105), and a transparent plastic plate is fixed on the observation window (106); The observation window (106) is located on the upper side of the circuit body (108); The sealing cover (105) is fixed to the top of the outer shell (104) by bolts, and a rubber pad is fixed at the connection between the sealing cover (105) and the outer shell (104).

4. An electromagnetic water meter with automatic calibration function as described in claim 3, characterized in that, A partition (109) is fixed inside the outer shell (104); The partition (109) is a rectangular plate, and the partition (109) divides the outer shell (104) into two chambers; The circuit body (108) and the battery (107) are located on both sides of the partition (109).

5. An electromagnetic water meter with automatic calibration function as described in claim 1, characterized in that, The connecting ring (202) consists of two semi-circular rings; The connecting rings (202) are fixed together by bolts; The sliding ring (204) is a rubber ring, and the inner side of the connecting ring (202) is in contact with the sliding ring (204).

6. An electromagnetic water meter with automatic calibration function as described in claim 1, characterized in that, The top of the support rod (203) is fixed with a connecting plate (103), and the connecting plate (103) is a rectangular plate; The connecting plate (103) is welded and fixed to the top of the support rod (203); The connecting plate (103) has multiple threaded holes, and the connecting plate (103) is used to fix the support rod (203) and the outer shell (104) together with bolts.

7. An electromagnetic water meter with automatic calibration function as described in claim 2, characterized in that, The water pipe (101) is fixedly connected to two ends of a connector pipe (102); The connector pipe (102) is used to fix the water pipe (101) to the pipeline by bolts, and a rubber pad is fixed at the connection between the connector pipe (102) and the pipeline; A limiting ring (208) is fixed on the water pipe (101), and the limiting ring (208) is located between the sliding rings (204); The limiting ring (208) and the guide rail (207) are in contact with each other.

8. A circuit for an electromagnetic water meter with automatic calibration function, applied to the electromagnetic water meter as described in claim 1, characterized in that, The main circuit (108) can be operated in an active or passive two-wire mode; When the main circuit (108) adopts active working mode, the battery (107) water meter provides 10V-24V power, and the output is two-wired through IOUT+ and common ground. When the main circuit (108) adopts a passive working mode, the IVCC power supply and the IOUT+ pin are provided by the external device in the subsequent stage.

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