CN111486906A - Gas meter - Google Patents

Abstract

The invention relates to the technical field of flow measurement, in particular to a gas meter. The method comprises the following steps: the fuel gas circulating device comprises a shell, wherein a channel for gas circulation is arranged in the shell, a torque flowmeter and an adjusting piece are arranged in the channel, and the torque flowmeter and the adjusting piece are sequentially arranged along the gas circulation direction; wherein the adjusting member is configured to adjust a pressure differential between the first end and the second end of the flow meter. The gas table in this application measures the flow of gas in the passageway through torque flow meter to the pressure of torque flow meter first end and second end can be adjusted to the regulating part, with satisfy user side user demand and improve the accuracy that torque flow meter measured.

Description

Gas Meter

technical field

The invention relates to the technical field of flow measurement, in particular to a gas meter.

Background technique

As a kind of high-quality energy and chemical raw materials, gas is widely used in various industries, and its measurement accuracy has been paid more and more attention in trade settlement. However, the existing measuring instruments cannot meet the requirements of measuring under large pressure difference, which limits the The scope of application of the meter and the accuracy of its measurement.

SUMMARY OF THE INVENTION

The invention provides a gas meter, the flow of gas in the channel is measured by the torque flowmeter, and the adjusting element can adjust the pressure of the first end and the second end of the torque flowmeter to improve the measurement accuracy of the torque flowmeter.

For achieving the above object, the present invention provides the following technical solutions:

A gas meter includes a casing, a channel for gas circulation is arranged in the casing, a torque flow meter and a regulating member are arranged in the channel, and the torque flow meter and the regulating member are arranged along the gas circulation path. The direction is set in turn;

Wherein, the adjusting member is used to adjust the pressure difference between the first end and the second end of the flow meter.

The gas meter in the present application is provided with a channel for gas circulation in its casing, and a torque flowmeter for detecting the gas flow is also provided on the gas flow path, and when the pressure of the first end and the second end of the torque flowmeter is When the difference is large, the torque may be too large and exceed the normal measurement range of the torque sensor, resulting in a decrease in the accuracy of the gas flow value detected by the torque flowmeter. The pressure difference at the second end is reduced, thereby ensuring the detection accuracy of the torque flowmeter, and at the same time making the gas meter applicable to a wider range.

Preferably, the regulating member includes a first rotating shaft, and a regulating valve disc, a high-pressure regulating part, a low-pressure regulating part and a driving plate mounted on the first rotating shaft;

The first rotating shaft is installed in the channel, and the driving plate is located between the high pressure regulating part and the low pressure regulating part;

Wherein, the intake end of the high pressure regulating part is located at the first end of the torque flowmeter, and the intake end of the low pressure regulating part is located at the second end of the torque flowmeter.

Preferably, the high-pressure regulating part includes a high-pressure airbag and a high-pressure conduit connected to the high-pressure airbag, and the low-pressure regulating part includes a low-pressure airbag and a low-pressure conduit connected to the low-pressure airbag;

Wherein, the intake end of the high pressure conduit is located at the first end of the torque flowmeter, and the intake end of the low pressure conduit is located at the second end of the torque flowmeter.

Preferably, the first rotating shaft passes through the center of the regulating valve disc.

Preferably, a return spring is provided on the drive plate.

Preferably, the torque flow meter comprises: a second rotating shaft disposed in the channel; a metering valve disc, a torque sensor, an angle sensor and a spring actuator installed on the second rotating shaft;

The torque sensor is used for detecting the torque of the metering valve disc rotating;

The angle sensor is used to detect the rotation angle of the metering valve disc.

Preferably, the metering valve disc is eccentrically mounted on the second shaft.

Preferably, a pressure sensor is also included, and the pressure sensor is located at one end of the metering valve disc away from the regulating member.

Preferably, a temperature sensor is also included, and the temperature sensor is located at one end of the metering valve disc away from the adjusting member.

Preferably, an intelligent terminal is also included, and the intelligent terminal is used for signal connection with the torque sensor, angle sensor, pressure sensor and temperature sensor.

Description of drawings

FIG. 1 is a schematic structural diagram of a gas meter provided by the present invention.

Icons: 1-metering valve disc; 2-torque sensor; 3-second shaft; 4-angle sensor; 5-spring actuator; 6-regulating valve disc; 7-high pressure airbag; 8-high pressure conduit; 9-low pressure airbag ; 10-low pressure conduit; 11-first shaft; 12-drive board; 13-intelligent terminal; 14-pressure sensor; 15-temperature sensor; 16-shell.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to FIG. 1 , a gas meter provided by an embodiment of the present invention includes a casing 16 , a passage for gas circulation is arranged in the casing 16 , and a torque flow meter and an adjusting member are arranged in the passage. The torque flow meter and the adjusting member are arranged in sequence along the direction of the gas flow;

Wherein, the adjusting member is used to adjust the pressure difference between the first end and the second end of the flow meter.

The gas meter in the present application is provided with a channel for gas circulation in its casing 16, and a torque flowmeter for detecting the gas flow is also provided on the gas flow path, and when the first end of the torque flowmeter and the second When the pressure difference between the two ends is large, the torque may be too large and exceed the normal measurement range of the torque sensor, resulting in a decrease in the accuracy of the gas flow value detected by the torque flowmeter. The pressure difference between the end and the second end is reduced, thereby ensuring the detection accuracy of the torque flowmeter, and at the same time, the gas meter can be applied in a wider range.

It should be noted that the gas in the pipeline can also be replaced with chilled water, cooling water, tap water, hot water, petroleum and other industrial liquid materials, compressed air or compressed industrial gas, etc.

As an optional method, the adjusting member includes a first rotating shaft 11 , and a regulating valve disc 6 , a high-pressure adjusting part, a low-pressure adjusting part and a driving plate 12 mounted on the first rotating shaft 11 ; the first rotating shaft 11 is installed in the passage, and the drive plate 12 is located between the high pressure regulating part and the low pressure regulating part; wherein, the intake end of the high pressure regulating part is located at the first end of the torque flow meter, The intake end of the low pressure regulator is located at the second end of the torque flow meter. Specifically, when the gas passes through the regulating valve disc 6, the regulating valve disc 6 drives the first shaft 11 to rotate. When the pressure difference between the first end and the second end of the torque flowmeter is large, the driving plate 12 is located in the high pressure regulating part and the low pressure regulating part. and the driving plate 12 is connected to the first rotating shaft 11. At this time, under the action of the high pressure regulating part and the low pressure regulating part, the driving plate 12 will drive the first rotating shaft 11 to rotate, and the direction of rotation is the same as that of the regulating valve disc 6 The direction of driving the first shaft 11 to rotate is opposite, so that the regulating valve disc 6 is closed to a certain degree of opening, and a certain amount of pressure is consumed to ensure that the difference between the first end and the second end of the torque flowmeter is in an appropriate range.

It should be noted that the first rotating shaft 11 passes through the center of the regulating valve disc 6 , and in a specific implementation process, the regulating valve disc 6 can also be eccentrically installed on the first rotating shaft 11 .

As an alternative, the high-pressure regulating part includes a high-pressure airbag 7 and a high-pressure conduit 8 connected to the high-pressure airbag 7 , and the low-pressure regulating part includes a low-pressure airbag 9 and a low-pressure conduit 10 connected to the low-pressure airbag 9 . ; Wherein, the intake end of the high pressure conduit 8 is located at the first end of the torque flow meter, the intake end of the low pressure conduit 10 is located at the second end of the torque flow meter, and the high pressure air bag 7 is far from The distance of the torque flow meter is smaller than the distance of the low pressure air bag 9 from the torque flow meter. With this arrangement, when the pressure difference between the first end and the second end of the torque flowmeter is large, the high-pressure gas at the first end enters the high-pressure airbag 7 through the intake end of the high-pressure conduit 8, and the low-pressure gas at the second end passes through the high-pressure airbag 7. The low-pressure conduit 10 enters the low-pressure airbag 9, so that the high-pressure airbag 7 and the low-pressure airbag 9 will drive the driving plate 12 disposed between them to rotate, so as to make the first rotating shaft 11 connected with the driving plate 12 to rotate, Then, the regulating valve disc 6 is driven to rotate, so that the opening of the regulating valve disc 6 is reduced, thereby ensuring that the difference between the first end and the second end of the torque flow meter is in an appropriate range.

It should be noted that a return spring is installed on the drive plate 12, and the setting of the return spring can ensure that the regulating valve disc 6 returns to the initial state after the work is completed.

As an optional method, the torque flow meter includes: a second shaft 3 disposed in the channel; a metering valve disc 1 , a torque sensor 2 , an angle sensor 4 and a metering valve disc 1 , a torque sensor 2 , an angle sensor 4 and a The spring actuator 5 ; the torque sensor 2 is used for detecting the rotational torque of the metering valve disc 1 ; the angle sensor 4 is used for detecting the rotation angle of the metering valve disc 1 . Specifically, when the gas passes through the metering valve disk 1, the metering valve disk 1 drives the second shaft 3 to rotate, and the torque sensor 2 and the angle sensor 4 can detect the rotation angle and torque of the metering valve disk 1, while the spring actuator 5 The setting can make the torque generated by the gas to the metering valve disc 1 and the torque generated by the spring actuator 5 balance when the second rotating shaft 3 rotates, so as to ensure the rotation angle of the metering valve disc 1, so that it will not rotate. Too large to ensure the accuracy of torque flowmeter measurement.

It should be noted that the metering valve disc 1 is eccentrically mounted on the second rotating shaft 3, so that when the gas passes through the metering valve disc 1, its sensitivity is higher.

As an optional manner, a pressure sensor 14 is also included, and the pressure sensor 14 is located at the end of the metering valve disc 1 away from the regulating member. A temperature sensor 15, the temperature sensor 15 is located at the end of the metering valve disc 1 away from the regulating member. Pressure sensor 14 and temperature sensor 15 are used to measure temperature and pressure within the pipeline for density compensation.

As an optional manner, a smart terminal 13 is also included, and the smart terminal 13 is used for signal connection with the torque sensor 2 , the angle sensor 4 , the pressure sensor 14 and the temperature sensor 15 . In this way, the smart terminal 13 is respectively connected with the torque sensor 2 , the angle sensor 4 , the temperature sensor 15 and the pressure sensor 14 through signal lines, and the smart terminal 13 passes the feedback signal of the angle sensor 4 , the torque sensor 2 The signal, the temperature sensor 15 signal and the pressure sensor 14 signal calculate the real-time flow and cumulative flow of gas.

In the initial state, the metering valve disc 1 and the regulating valve disc 6 are kept at a certain opening degree. During operation, when the gas passes through the metering valve plate 1, it generates torque, and the gas pushes the metering valve plate 1 to open a certain angle (that is, rotates a certain angle), and the torque generated by the gas on the metering valve plate 1 is the same as that of all the gas. The torque generated by the spring actuator 5 is balanced, so that the metering valve disc 1 is kept at this opening. The torque is measured by the torque sensor 2 and sent to the smart terminal 13, and the angle sensor 4 When the opening value of the metering valve plate 1 is sent to the intelligent terminal 13, the temperature sensor 15 and the pressure sensor 14 send the temperature and pressure signals of the gas to the intelligent terminal 13, and the intelligent terminal 13 Calculates real-time volume flow and mass flow based on angle, torque, temperature, pressure signals.

When the pressure difference between the front and rear of the metering valve disc 1 is too large, the regulating valve disc 6 will close a certain opening degree under the action of the high pressure airbag 7 and the low pressure airbag 9 through the driving plate 12 to consume excess The pressure head can prevent the torque sensor 2 from being damaged due to excessive pressure difference between the front and rear of the metering valve disc 1, so that the torque sensor 2 can be kept in an optimal working state, thereby improving the measurement accuracy of the torque flow meter.

It should be noted that the front end of the metering valve plate 1 is the first end of the torque flowmeter, the rear end of the metering valve plate 1 is the second end of the torque flowmeter, and the front end of the metering valve plate 1 is the initial state, away from the adjustment One end of the valve disc 6 and the rear end of the metering valve disc 1 are close to one end of the regulating valve disc 6 even in the initial state.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A gas meter, comprising: the fuel gas circulating device comprises a shell, wherein a channel for gas circulation is arranged in the shell, a torque flowmeter and an adjusting piece are arranged in the channel, and the torque flowmeter and the adjusting piece are sequentially arranged along the gas circulation direction;

wherein the adjusting member is configured to adjust a pressure differential between the first end and the second end of the flow meter.

2. The gas meter of claim 1, wherein the regulating member comprises a first rotating shaft, and a regulating valve disc, a high pressure regulating part, a low pressure regulating part and a driving plate which are mounted on the first rotating shaft;

the first rotating shaft is installed in the channel, and the driving plate is located between the high-pressure regulating part and the low-pressure regulating part;

the air inlet end of the high-pressure adjusting part is located at the first end of the torque flow meter, and the air inlet end of the low-pressure adjusting part is located at the second end of the torque flow meter.

3. The gas meter according to claim 2, wherein the high pressure regulating portion includes a high pressure gas bag and a high pressure conduit connected to the high pressure gas bag, and the low pressure regulating portion includes a low pressure gas bag and a low pressure conduit connected to the low pressure gas bag;

wherein the inlet end of the high pressure conduit is located at a first end of the torque flow meter and the inlet end of the low pressure conduit is located at a second end of the torque flow meter.

4. A gas meter according to claim 2 or 3, wherein the first axis of rotation passes through the centre of the regulator disk.

5. The gas meter of claim 3, wherein a return spring is provided on the drive plate.

6. The gas meter of claim 1, wherein the torque flow meter comprises: a second rotating shaft is arranged in the channel; the metering valve disc, the torque sensor, the angle sensor and the spring actuator are arranged on the second rotating shaft;

the torque sensor is used for detecting the torque of the rotation of the metering valve disc;

the angle sensor is used for detecting the rotating angle of the metering valve disc.

7. The gas meter of claim 6, wherein the metering valve disk is eccentrically mounted to the second shaft.

8. The gas meter of claim 6, further comprising a pressure sensor located at an end of the metering valve disc remote from the regulator.

9. The gas meter of claim 8, further comprising a temperature sensor located at an end of the metering valve disc remote from the regulator.

10. The gas meter of claim 9, further comprising an intelligent terminal, wherein the intelligent terminal is in signal connection with the torque sensor, the angle sensor, the pressure sensor and the temperature sensor.

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