CN206772369U - A kind of small-bore CPU card pre-payment rotz flowmeter - Google Patents

Abstract

The utility model provides a small-diameter CPU card prepaid waist wheel flowmeter, which includes a waist wheel flowmeter base meter with a nominal diameter of 20mm or 25mm, and a control valve connected with the waist wheel flowmeter base meter, which is arranged on the waist wheel The CPU card flow compensation control instrument on the flowmeter base meter, the CPU card flow compensation control instrument includes a casing and a circuit board arranged in the casing, a CPU card seat is provided on the casing, and the circuit board includes a The metering circuit, compensation circuit and power management circuit of the microprocessor, the CPU card holder is connected to the metering circuit, and the CPU card holder can be plugged and set with an IC card to realize the prepaid function of the small-caliber flowmeter, and is equipped with The waist wheel flowmeter is superior to the membrane meter in terms of measurement performance, and has obvious advantages in accurate measurement, which further improves the use requirements of small-caliber flowmeters in the field of civil and industrial flowmeters.

Description

A small-diameter CPU card prepaid waist wheel flowmeter

technical field

The utility model relates to a small-caliber CPU card prepaid waist wheel flow meter, in particular to an integrated prepaid flow meter equipped with a waist wheel flow meter with a nominal diameter of 20 mm and 25 mm, a control valve, and a CPU card flow compensation controller. count.

Background technique

At present, the nominal diameter of prepaid flowmeters based on waist wheel flowmeters is usually 50mm and above, and the base meters of small diameter series prepaid flowmeters with nominal diameters of 20mm and 25mm are usually membrane meters. However, a membrane gas meter is a mechanical instrument. The driving force of the film movement depends on the gas pressure difference between the inlet and outlet of the gas meter, and can measure the flow rate in the low pressure range. Moreover, this membrane meter has many parts and a complicated mechanical structure. , easy aging and large volume, low measurement accuracy. Compared with the membrane meter, the gas waist wheel flowmeter is a volumetric flowmeter, and its measurement principle is to periodically fill or discharge the gas in one or several metering spaces to measure the gas volume flow. The gas waist wheel flowmeter has high measurement accuracy, good reliability, no straight pipe section, and a relatively large measuring range. Whether in low temperature, normal temperature, high temperature, normal pressure, high pressure, vacuum and other environments, or in the face of single-phase or mixed fluids, regardless of the diameter of the pipe, the gas waist wheel flowmeter can achieve effective measurement. In addition, its shock resistance It also has excellent performance in high pressure resistance.

Utility model content

In order to solve the above technical problems, the utility model provides a small diameter CPU card prepaid waist wheel flowmeter.

The utility model provides a small-diameter CPU card prepaid waist wheel flowmeter, which includes a waist wheel flowmeter base meter with a nominal diameter of 20mm or 25mm, and a control valve connected with the waist wheel flowmeter base meter, which is arranged on the waist wheel The CPU card flow compensation control instrument on the flowmeter base meter, the CPU card flow compensation control instrument includes a casing and a circuit board arranged in the casing, a CPU card seat is provided on the casing, and the circuit board includes a The metering circuit, the compensation circuit and the power management circuit of the microprocessor, the CPU card holder is connected with the metering circuit, and the IC card can be inserted and removed in the CPU card holder.

The compensation circuit includes a temperature compensation circuit and a pressure compensation circuit, which include a temperature sensor and a pressure sensor respectively connected to the metering circuit.

The metering circuit includes a flow sensor and a control circuit.

The metering circuit is also provided with a reading module for obtaining the balance in the IC card, a payment module for deducting the corresponding amount of the IC card according to the gas consumption, and a control module for controlling the opening and closing of the valve according to the balance in the IC card.

The metering module is also provided with a communication module.

The housing is provided with a display component.

The circuit board includes a metering board and a power board, the metering circuit and the compensation circuit constitute the metering board, the power management circuit constitutes the power board, and the two are electrically connected through a cable.

The control valve is a low-pressure type quick cut-off valve.

The power management circuit includes a battery assembly and an internal and external power switching circuit, and the battery assembly is connected to the internal power circuit.

The beneficial effects of the utility model: realize the prepayment function of the small-diameter flowmeter, and equip the waist wheel flowmeter, which is higher in measurement performance than the film meter, has obvious advantages in accurate measurement, and further improves the application of the small-caliber flowmeter in civil and industrial flow. needs in the field of computing.

Description of drawings

Figure 1 is the front view of the small-diameter CPU card prepaid waist wheel flowmeter.

Figure 2 is a side view of the small-diameter CPU card prepaid waist wheel flowmeter.

Fig. 3 is the rear view of the small-bore CPU card prepaid waist wheel flowmeter.

Fig. 4 is an internal schematic diagram 1 of a small-diameter CPU card prepaid waist wheel flowmeter.

Fig. 5 is the internal schematic diagram 2 of the small-bore CPU card prepaid waist wheel flowmeter.

Fig. 6 is a functional block diagram of a small-diameter CPU card prepaid waist wheel flowmeter.

Fig. 7 is a front view of the embodiment of the present utility model.

Fig. 8 is a side view of an embodiment of the present invention.

Fig. 9 is a rear view of the embodiment of the present invention.

In the figure, 1. Indicator lights, 2. Display components, 3. Shell, 4. Buttons, 5. RS485 communication interface, 6. CPU card holder, 7. Valve control interface, 8. Flow sensor interface, 9. Pressure sensor interface , 10. Temperature sensor interface, 11. Measuring board, 12. Cable, 13. Battery assembly, 14. Power board, 15. Flow meter, 16. Control valve, 17. Microprocessor.

detailed description

Below in conjunction with accompanying drawing, the utility model embodiment is further described:

As shown in the figure, the utility model provides a small-caliber CPU card prepaid waist wheel flowmeter, which includes a waist wheel flowmeter base meter with a nominal diameter of 20mm or 25mm, and a control valve connected to the waist wheel flowmeter base meter , the CPU card flow compensation control instrument arranged on the base meter of the waist wheel flowmeter, the CPU card flow compensation control instrument includes a casing and a circuit board arranged in the casing, and a CPU card seat is arranged on the casing, so The circuit board includes a microprocessor-based metering circuit, a compensation circuit and a power management circuit, the CPU socket is connected to the metering circuit, and an IC card can be inserted and removed in the CPU socket.

The microprocessor is respectively connected with the flow sensor interface circuit, the pressure sensor interface circuit, the temperature sensor interface circuit, the power management circuit, the valve control interface, the CPU deck, the display drive circuit, the memory, the keys and the pulse frequency amplification drive circuit.

The compensation circuit includes a temperature compensation circuit and a pressure compensation circuit, which include a temperature sensor and a pressure sensor respectively connected to the metering circuit. The metering circuit includes a flow sensor and a control circuit.

The flow sensor is installed in the base meter of the waist wheel flowmeter with a nominal diameter of 20mm or 25mm, and is connected with the microprocessor through the interface circuit of the flow sensor through the lead wire.

The pressure sensor is installed in the base meter of the waist wheel flowmeter with a nominal diameter of 20mm or 25mm, and is connected with the microprocessor through the pressure sensor interface circuit through the lead wire.

The temperature sensor is installed in the base meter of the waist wheel flowmeter with a nominal diameter of 20mm or 25mm, and is connected with the microprocessor through the temperature sensor interface circuit through the lead wire.

The flow sensor interface 8 is connected to the interface circuit of the flow sensor, the pressure sensor interface 9 is connected to the interface circuit of the pressure sensor, the temperature sensor interface 10 is connected to the interface circuit of the temperature sensor, and the display assembly 2 is arranged on the casing 3 for displaying temperature, Pressure, gas volume flow and total amount, balance, valve status, and read IC card recharge information, etc., CPU card holder 6 is used to insert IC card, key 4 is used to control display component 3, that is, display window switching, battery component 13 They are respectively connected to the power board 14, and the power board 14 is connected to the metering board 11 through the cable 12, that is, the metering board with a microprocessor as the core, and an indicator light 1 is also provided on the shell to indicate the working state .

The metering circuit is also provided with a reading module for obtaining the balance in the IC card, a payment module for deducting the corresponding amount of the IC card according to the gas consumption, and a control module for controlling the opening and closing of the valve according to the balance in the IC card. The metering module is also provided with a communication module, and the communication module adopts RS485 communication interface.

A microprocessor 17 is mounted on the metering board 11. When the battery management circuit is fully powered, the whole circuit starts to work. When the microprocessor 17 receives the signals of the flow sensor, pressure sensor, and temperature sensor connected at the flow sensor interface 8, the pressure sensor interface 9, and the temperature sensor interface 10, and Carry out calculation processing, correct the flow rate according to the gas state equation to the flow rate of the reference state and accumulate it according to time, and output the temperature value, pressure value, flow value, cumulative value, etc. obtained by the detection operation to the display component 3, or through RS485 The communication interface 5 exchanges the detection operation data and related data with the peripherals.

The metering board is connected with the flow meter (or flow sensor), pressure sensor, temperature sensor, IC card holder, valve control interface and control valve. The metering board is used to receive the pulse signal of the flowmeter and calculate the volume flow under working conditions, calculate the volume flow under the reference condition according to the pressure and temperature of the gas detected by the pressure and temperature sensors, and accumulate the total volume of the consumed gas, and at the same time Read and save the recharge information of the IC card, and deduct the consumed gas (volume or amount) from the balance in time. When the balance is 0 or the overdraft is greater than the credit limit, the control valve is closed to stop the gas supply to achieve "first For the purpose of "using gas after purchasing gas", the metering board is located in the casing of the CPU card flow compensation controller.

There are several ways of recharging: a. using an IC card as a recharging medium, and connecting with the microprocessor 17 through the IC card interface 6; b. through the RS485 communication module 5. When the microprocessor 17 judges the "overdraft" situation, the valve is controlled to be closed by the valve control interface 16; When an external power supply is applied, when the external power supply is connected to the power management circuit in the circuit board assembly A, the power supply of the battery assembly 13 is automatically cut off to save battery power.

In the embodiment, the utility model integrates the control valve 16 and the base meter 15 of the waist wheel flowmeter, and the flow sensor interface 8, the pressure sensor interface 9, and the temperature sensor interface 10 are installed on the shell of the waist wheel flowmeter base meter 15, and the valve The control interface 7 is connected to a control valve 16 . The base meter 15 of the waist wheel flowmeter is connected to the control valve 16 through a flange.

The housing is provided with a display component, and the display driving circuit is electrically connected with the display component.

The circuit board includes a metering board and a power board, the metering circuit and the compensation circuit constitute the metering board, the power management circuit constitutes the power board, and the two are electrically connected through a cable.

The control valve is a low-pressure type quick cut-off valve with a zero pressure loss structure design, adopts a ball valve structure, and the valve diameter is the same as the pipe diameter.

The power management circuit includes a battery assembly 13 and an internal and external power switching circuit, and the battery assembly is connected to the internal power circuit.

The embodiments should not be regarded as limiting the utility model, and any improvement based on the spirit of the utility model should be within the protection scope of the utility model.

Claims (9)

1. a kind of small-bore CPU card pre-payment rotz flowmeter, it is characterised in that it is 20mm's or 25mm that it, which includes inside nominal diameter, Rotz flowmeter base table, the control valve being connected with rotz flowmeter base table, the CPU card stream being arranged on rotz flowmeter base table Amount compensation controller, the flow-compensated controller of CPU card includes shell and the circuit board being arranged in the shell, described Shell is provided with CPU card seat, and the circuit board includes the metering circuit based on microprocessor, compensation circuit and power management electricity Road, the CPU card seat are connected with the metering circuit, and the pluggable setting IC-card of the CPU card seat.

A kind of 2. small-bore CPU card pre-payment rotz flowmeter according to claim 1, it is characterised in that the compensation Circuit includes temperature-compensation circuit and pressure compensation circuit, and it includes temperature sensor, the pressure being connected respectively with metering circuit Force snesor.

A kind of 3. small-bore CPU card pre-payment rotz flowmeter according to claim 1 or 2, it is characterised in that the meter Amount circuit includes flow sensor and control circuit.

A kind of 4. small-bore CPU card pre-payment rotz flowmeter according to claim 3, it is characterised in that the metering Circuit be additionally provided with for obtain the read module of remaining sum in IC-card, according to gas consumption deduct IC-card correspond to the amount of money payment module, According to the control module of remaining sum control control valve open and close in IC-card.

A kind of 5. small-bore CPU card pre-payment rotz flowmeter according to claim 4, it is characterised in that the metering Circuit is additionally provided with communication module.

A kind of 6. small-bore CPU card pre-payment rotz flowmeter according to claim 1, it is characterised in that the shell It is provided with display module.

A kind of 7. small-bore CPU card pre-payment rotz flowmeter according to claim 1, it is characterised in that the circuit Plate includes metering plate and power panel, and the metering circuit and compensation circuit form metering plate, and electric power management circuit forms electricity Source plate, and both are electrically connected by winding displacement.

A kind of 8. small-bore CPU card pre-payment rotz flowmeter according to claim 1, it is characterised in that the control Valve is low-pressure type repid cut-off valve.

A kind of 9. small-bore CPU card pre-payment rotz flowmeter according to claim 1, it is characterised in that the power supply Management circuit includes battery component and inside and outside power supply switch circuit, and the battery component is connected with internal power circuit.