CN218628566U - Volume correction instrument for gas flowmeter - Google Patents

Abstract

The utility model discloses a volume correction appearance for gas flowmeter, including lower cover and upper cover, the two surround and form circuit board installation cavity, set up the mainboard in this circuit board installation cavity, the mainboard includes upper motherboard and lower mainboard, and the two are connected through the route, upper motherboard installs at the upper cover, lower mainboard is connected with the battery, the battery can seal the installation, lower mainboard and battery install in the lower cover; the main board is provided with a microprocessor, the microprocessor is connected with a power module, a communication module and a working condition environment detection module, and the microprocessor is connected with an upper computer through the communication module; and a metering module and a storage module are arranged in the microprocessor. Has the advantages that: the interior is reasonably arranged, the occupied space is small, and the private dismantling resistance is high; a variety of flow meters can be adapted. A plurality of correction calculation operators are arranged in the microprocessor, different correction standards can be used, and the correction algorithm can be automatically adjusted according to requirements to carry out metering correction.

Description

Volume correction instrument for gas flowmeter

Technical Field

The utility model belongs to the technical field of the flowmeter correction appearance, concretely relates to volume correction appearance for gas flowmeter.

Background

The flowmeter is a necessary product for industrial application, has high added value and wide application. Because natural gas is greatly influenced by actual working conditions and the flow rate of the industrial flowmeter is high, real-time correction is needed in the detection process, and a flowmeter corrector is designed for real-time correction.

The existing flowmeter corrector has the following defects:

first, most of them are installed inside the flow meter or attached to the flow meter to form a whole meter detection unit. However, because the corrector needs to calculate multiple parameters and multiple signals for correction, the number of internal components is large, the layout is disordered, the installation is complex, the circuit board is large as a whole, and after the components such as the display and the shell are packaged, the size of the corrector is greatly increased, and the corrector is installed in a flowmeter or is installed close to the flowmeter, so that a large amount of space can be occupied.

Secondly, if the internal circuit boards are multiple, the internal circuit boards are often arranged layer by layer in an overlapping mode to form a whole, and if the circuit board installation mode is adopted, the circuit boards need to be disassembled for maintenance and observation if the lower-layer circuit boards have problems during cover opening maintenance and repair; other faults are easily caused in the disassembly process, and the reliability is poor.

There is a need for adaptation to the above mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a volume correction appearance for gas flowmeter, to the inside overall arrangement improvement of current correction appearance, divide into two parts with the circuit board, and fix respectively on upper and lower lid, be convenient for overall arrangement and maintenance observation.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a volume correction instrument for a gas flowmeter is technically characterized in that: the battery box comprises a lower cover and an upper cover, wherein the lower cover and the upper cover are surrounded to form a circuit board mounting cavity, a mainboard is arranged in the circuit board mounting cavity, the mainboard comprises an upper mainboard and a lower mainboard, the upper mainboard and the lower mainboard are connected through a circuit, the upper mainboard is mounted on the upper cover, the lower mainboard is connected with a battery, the battery is packaged and mounted, and the lower mainboard and the battery are mounted on the lower cover; the lower cover and the upper cover are provided with at least one communication interface and at least one signal interface, and the communication interface and the signal interface are connected with the mainboard.

Through the design, the correction instrument shell is directly surrounded by the upper cover and the lower cover. Divide into mainboard and lower mainboard with its mainboard in circuit board installation cavity, and install at upper cover and lower cover respectively, when uncapping, go up the mainboard and show along with upper cover upset back is whole promptly, avoid dismantling. The reliability is good, and the design layout is reasonable. The battery is encapsulated, so that the explosion-proof performance is good.

The upper main board and the lower main board are supported and installed through the six-edge stud in the installation process, a certain gap is reserved between the upper main board and the lower main board and the cover body, and heat dissipation is accelerated.

Furthermore, in order to prevent disassembly, one side of the abutting edge of the lower cover and the upper cover is hinged, the other side of the abutting edge is fixedly connected through a screw, and a disassembly-preventing cap is arranged on the screw.

And furthermore, the top of the upper cover is provided with an observation window, the observation window is covered by glass, and a display screen observation port and an indicator light observation port are reserved on the glass. By adopting the scheme, the display screen arranged on the upper main board can visually see the internal data content and the lighting condition of the indicator lamp from the outside of the instrument through the observation port.

Furthermore, in order to prevent disassembly, the lower cover and the upper cover are both provided with wire sealing holes, and the same lead sealing wire is arranged coaxially in the wire sealing holes of the lower cover and the upper cover in a penetrating manner. Once the upper cover and the lower cover are separated, the lead sealing line can be broken, and workers can judge whether unpacking damage exists or not by observing the integrity of the lead sealing line. Furthermore, the lower cover and the upper cover are both made of aluminum alloy, and the control box is die-cast by aluminum alloy, so that the manufacturability is high; and the metal material is adopted, so that the heat dissipation performance is good.

Still further, in order to install and fix the correction instrument, the outer wall of the lower cover is also connected with an installation seat, and the installation seat is provided with a correction instrument installation part and a flowmeter installation part and is used for installing the correction instrument on the corrected flowmeter.

The corrected flowmeter can be an ultrasonic flowmeter, a turbine flowmeter, a waist wheel flowmeter, a pressure regulator and other gas volume measuring instruments.

A control system of a volume correction instrument for a gas flowmeter comprises the volume correction instrument for the gas flowmeter, wherein a microprocessor is installed on a mainboard of the volume correction instrument for the gas flowmeter, the microprocessor is connected with a power supply module, a communication module and a working condition environment detection module, and the microprocessor is connected with an upper computer through the communication module;

a metering module and a storage module are arranged in the microprocessor;

the working condition environment detection module is used for acquiring the working condition data of the gas flowmeter and storing the working condition data to the storage module;

working condition data, standard condition data, N-type flow correction operators, M-type flow and overload calculation operators and gas composition correction parameters are stored in the storage module;

the metering module comprises a flow correction computing unit, a flow rate and overload computing unit and an ultrasonic metering unit; the flow correction calculation unit selects a correction operator, calculates a flow correction metering result by combining working condition data and standard condition data, and feeds the flow correction metering result back to the upper computer; the flow rate and overload calculation unit selects a flow and overload calculation operator, calculates a flow rate and overload correction metering result according to the working condition data and the standard condition data, and feeds the flow rate and overload correction metering result back to the upper computer.

Through the design, a plurality of correction operators are stored in the microprocessor, and under different environments and requirements, the operators can be adaptively selected according to requirements to perform correction metering, so that the flow meter is subjected to correction metering. Wherein the correction content is added to the correction of the flow, the flow speed and the overload in the form of a single correction object, and the use range is increased. The working condition data in the storage module is acquired through an external interface of the corrector. The gas composition correction parameters are written in a matching mode through remote transmission of the cloud platform through the communication module or through the infrared communication unit.

The system comprises a correction instrument environment detection module, a power supply module, a high-intensity magnetic interference detection module, an infrared awakening detection module, a wire cutting detection module and an RTC detection module, wherein signals acquired by the correction instrument environment detection module at least comprise a wire cutting prevention detection signal, a cover opening detection signal, a power supply detection signal, a strong magnetic interference detection signal, an infrared awakening detection signal, a wire cutting detection signal and an RTC detection signal;

the gas flowmeter working condition data acquired by the working condition environment detection module at least comprise a temperature sensor signal, a pressure sensor signal and a pulse flow signal.

By adopting the scheme, the environment detection module of the correction instrument monitors the signal generated in the instrument, so that the correction deviation is prevented, and the correction reliability is improved. And comparing the actual working condition data with the standard condition to obtain difference data, and calculating a corrected metering parameter according to the influence of the difference data on metering.

Still further, the power module comprises an external power interface, a built-in lithium battery and a power supply detection module;

the external power supply interface is used for connecting an external power supply and supplies power to the microprocessor through the protection circuit and the DC-DC isolation conversion circuit;

the built-in lithium battery supplies power to the microprocessor through the DC-DC conversion circuit, and the built-in lithium battery is also connected with a power supply detection unit.

By adopting the scheme, the power supply is designed to be double-power-supply power supply, and the power supply detection module is adopted to detect the residual quantity of the power supply in the correction instrument in real time. And the battery in the battery is encapsulated, so that the explosion-proof performance is high.

Still further, the communication module comprises an infrared communication unit, a local serial communication unit, a remote wireless communication unit, an ultrasonic communication unit and a radio frequency card communication unit;

the microprocessor is connected with the upper computer through a local serial port communication unit in the communication module, and the microprocessor is connected with the cloud platform through a remote wireless communication unit in the communication module.

By adopting the scheme, the infrared communication unit realizes short-distance communication and functions of short-distance pairing, meter reading, data writing, data output and the like. And the data is uploaded to an upper computer and the like through a data line by a local serial port communication unit. And the remote wireless communication unit is combined to realize data remote transmission, such as transmission to a platform, an instrument company, a gas company and the like. The functions of close-range meter reading, close-range multi-meter cooperative, identity authentication and the like are realized through the radio frequency communication unit.

The utility model has the advantages that:

the correcting instrument is designed, the internal layout of the correcting instrument is reasonable, the circuit board is divided into two parts which are respectively arranged on the upper cover and the lower cover of the shell, and when the cover is opened, the two parts of the circuit board are directly displayed. Due to the multiple anti-dismantling design, the anti-private dismantling property is high; the gas volume measuring device can be adapted to gas volume measuring instruments and meters such as ultrasonic flow meters, turbine flow meters, waist wheel flow meters and pressure regulators, and has wide application range. The internal components are inserted and connected by FPC flat cables, and the assembly performance is good. A plurality of correction calculation operators are arranged in the microprocessor, different correction standards can be used, and the correction algorithm can be automatically adjusted according to requirements to carry out metering correction. Wide adaptability and multiple purposes.

Drawings

Fig. 1 is a schematic view of a partial three-dimensional structure of the correction instrument of the present invention;

fig. 2 is a schematic view of the local three-dimensional structure of the correction instrument of the present invention;

FIG. 3 is a top view of the local structure of the correction instrument of the present invention;

FIG. 4 isbase:Sub>A schematic cross-sectional view taken at A-A of FIG. 3;

FIG. 5 is a schematic view of the correction instrument of the present invention in a three-dimensional arrangement and in a use state installed in a turbine flowmeter;

FIG. 6 is a block diagram of a volume corrector control system for a gas flow meter.

In the figure: 1a, a lower cover; 1b, an upper cover; 2. a circuit board mounting chamber; 3. a battery; 4. an upper main board; 5. a lower main board; 6. a power supply + local serial port communication interface; 7. an input & output interface; 8. a radio frequency interface; 9. a pressure sensor interface; 10. a temperature sensor interface; 11. a correction instrument key; 12. a tamper cap; 13. a mounting base; 14. and a wire sealing hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In the specific implementation: as shown in figures 1 to 6 of the drawings,

a volume corrector for a gas flow meter, see FIGS. 1 and 2, comprises a lower cover 1a and an upper cover 1b enclosing a circuit board mounting chamber 2, see FIG. 4,

a mainboard is arranged in the circuit board mounting cavity and comprises an upper mainboard 4 and a lower mainboard 5 which are connected through a circuit, the upper mainboard is mounted on an upper cover, the lower mainboard is connected with a battery 3, the battery 3 is potted and mounted, and the lower mainboard 5 and the battery 3 are mounted on the lower cover;

in this embodiment, all the openings are disposed on the lower cover, referring to fig. 1, a power supply + local serial port communication interface 6, an input/output interface 7, and a gas pipeline valve connection interface 8 are respectively disposed on a side wall of the lower cover, and in this embodiment, 485 communication is adopted for local serial port communication.

Referring to fig. 2, the other side wall of the lower cover is further provided with a radio frequency interface 8, a pressure sensor interface 9, a temperature sensor interface 10, and a corrector button 11.

In this embodiment, referring to fig. 1-3, the abutting edges of the lower cover and the upper cover are hinged on one side, the other side of the abutting edges are fixedly connected through screws, and anti-dismantling caps 12 are arranged on the screws.

In this embodiment, the top of the upper cover is provided with an observation window, the observation window is covered by glass, and a display screen observation port and an indicator light observation port are reserved on the glass. The size of the display screen viewing port is larger than that of the display in the circuit board mounting cavity.

In this embodiment, seal wire holes 14 have all been seted up to lower cover, upper cover, the same plumbous seal wire of wearing to be equipped with is worn to the coaxial setting in seal wire hole of lower cover, upper cover. (ii) a

In this embodiment, the lower cover and the upper cover are both made of aluminum alloy.

In this embodiment, referring to fig. 5, the lower cover outer wall is further connected with a mounting seat 13, which is provided with a corrector mounting part and a flowmeter mounting part, which is mounted on the turbine flowmeter in this embodiment. In this embodiment, the mounting seat is integrally formed in a bent plate shape, and the bent portion of the mounting seat can be adjusted in bending degree according to the mounting environment.

In the embodiment, referring to fig. 6, a microprocessor is mounted on a main board of the volume corrector for the gas flowmeter, and is connected with a power supply module, a communication module and a working condition environment detection module, and the microprocessor is connected with an upper computer through the communication module; a metering module and a storage module are arranged in the microprocessor; the working condition environment detection module is used for acquiring the working condition data of the gas flowmeter and storing the working condition data to the storage module; working condition data, standard condition data, N-type flow correction operators, M-type flow and overload calculation operators and gas composition correction parameters are stored in the storage module;

where N and M are both positive integers, and in this embodiment, N and M are both =2. Since the operator is also in design debugging, it is not specifically described.

In this embodiment, the metering module includes a flow correction calculation unit, a flow rate and overload calculation unit; the flow correction calculation unit selects a correction operator, calculates a flow correction metering result by combining working condition data and standard condition data, and feeds the flow correction metering result back to the upper computer; the flow rate and overload calculation unit selects a flow rate and overload calculation operator, calculates a flow rate and overload correction metering result according to the working condition data and the standard condition data, and feeds the flow rate and overload correction metering result back to the upper computer.

In this embodiment, the system further comprises a corrector environment detection module, wherein the signals acquired by the corrector environment detection module comprise an anti-shearing detection signal, an uncovering detection signal, a power supply detection signal, a strong magnetic interference detection signal, an infrared awakening detection signal, a wire shearing detection signal and an RTC detection signal;

in this embodiment, the gas flowmeter operating condition data acquired by the operating condition environment detection module includes a temperature sensor signal, a pressure sensor signal, and a pulse flow signal.

In this embodiment, referring to fig. 5, the power module includes an external power interface, a built-in lithium battery, and a power supply detection module; the external power supply interface is used for connecting an external power supply and supplies power to the microprocessor through the protection circuit and the DC-DC isolation conversion circuit; the built-in lithium battery supplies power to the microprocessor through the DC-DC conversion circuit, and the built-in lithium battery is also connected with a power supply detection unit.

In this embodiment, referring to fig. 5, the communication module includes an infrared communication unit, a local serial communication unit, a remote wireless communication unit, an ultrasonic communication unit, and a radio frequency card communication unit; the microprocessor is connected with the upper computer through a local serial port communication unit in the communication module, and the microprocessor is connected with the cloud platform through a remote wireless communication unit in the communication module.

The utility model discloses a theory of operation is:

the corrector is installed on the flowmeter through the installation seat 12 and is connected with the pressure sensor, the temperature sensor connector and the input and output connector, so that the microprocessor in the corrector can acquire the detection working condition of the flowmeter. When needing to uncap, use specialized tool to disassemble and prevent tearing open the cap, behind the swivel screw, the lid separation about making, directly uncap the back, upper and lower mainboard demonstrates completely promptly, if will maintain the observation, opens the upper cover and can accomplish. After the encapsulation is accomplished, the lead sealing line combines with the anti-removal cap to realize preventing tearing open the function, if prevent tearing open cap and lead sealing line and take place to damage, then can somebody damage for uncapping.

And acquiring a flow signal, a pressure signal and a temperature signal through a connector on the side of the corrector, and performing flow correction by combining a gas component correction parameter and a gas actual component stored in the storage module and combining a required operator.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the technical scope of the present invention, and the technical scope of the present invention is also considered to fall into the scope of the claims.

Claims (6)

1. A volume corrector for a gas flow meter, characterized by: the battery box comprises a lower cover and an upper cover, wherein the lower cover and the upper cover are surrounded to form a circuit board mounting cavity, a main board is arranged in the circuit board mounting cavity, the main board comprises an upper main board and a lower main board, the upper main board and the lower main board are connected through a line, the upper main board is mounted on the upper cover, the lower main board is connected with a battery, the battery is packaged and mounted, and the lower main board and the battery are mounted on the lower cover;

the lower cover and the upper cover are provided with at least one communication interface and at least one signal interface, and the communication interface and the signal interface are connected with the mainboard.

2. The volume corrector for a gas flowmeter of claim 1, wherein: one side of the abutting edge of the lower cover and one side of the abutting edge of the upper cover are hinged, the other side of the abutting edge is fixedly connected through a screw, and an anti-dismantling cap is arranged on the screw.

3. The volume corrector for a gas flowmeter of claim 1, wherein: the top of the upper cover is provided with an observation window, the observation window is covered by glass, and a display screen observation port and an indicator light observation port are reserved on the glass.

4. The volume corrector for a gas flowmeter of claim 1, wherein: the lower cover and the upper cover are both provided with wire sealing holes, and the same lead sealing wire is arranged in the coaxial arrangement of the wire sealing holes of the lower cover and the upper cover in a penetrating way.

5. The volume corrector for a gas flowmeter of claim 1, wherein: the lower cover and the upper cover are both made of aluminum alloy materials.

6. The volume corrector for a gas flowmeter of claim 1, wherein: the outer wall of the lower cover is further connected with a mounting seat, and the mounting seat is provided with a corrector mounting part and a flowmeter mounting part and is used for mounting the corrector on a corrected flowmeter.

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