Wide-temperature-range gas flowmeter calibrating device with adjustable natural gas components

Abstract

The utility model provides a wide-temperature-range gas flowmeter calibrating device with adjustable natural gas components, which comprises a gas distribution component, a pressure flow controller, a dehumidifier, a refrigerator, a first heat exchanger, a constant-temperature box, a second heat exchanger, a standard meter component, a compressor, a condenser, a surge tank and a controller, a gas mixer in the gas distribution assembly is connected with a pressure flow controller and a dehumidifier, a gas outlet of the dehumidifier is connected with a refrigerator and a first heat exchanger in parallel, a heating and refrigerating pipe and a plurality of detected gas meters connected in series are arranged in the constant temperature box, and the refrigerator and a gas outlet of the first heat exchanger are connected with the detected gas meters connected in series. A gas outlet of the detected gas meter is connected with the second heat exchanger, a standard gas meter of the standard meter assembly, the compressor, the condenser and the surge tank. The controller is electrically connected with the constant temperature box, the standard meter assembly, the pressure flow controller, the compressor, the condenser and the surge tank. The device can simulate the metering performance of the gas meter under high and low temperature special practical application working conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas flowmeter measurement and detection technical field, concretely relates to a kind of wide temperature range gas flowmeter calibrating device of natural gas component adjustable. BACKGROUND

[0002] As key measuring instrument, the full-condition measurement accuracy of gas meter directly affects enterprise economic benefit, livelihood fairness and gas safety. At present, electronic gas meter is widely used, but its measurement characteristics under medium component and high-low temperature special conditions are different, and conventional gas meter calibrating device cannot realize flexible adjustment to medium temperature, leading to the inability to simulate the actual application conditions of gas meter, and a set of wide temperature range, multiple medium (adjustable natural gas component), high-precision gas meter calibrating device is urgently needed to solve the application limitation problem of existing calibrating device. UTILITY MODEL CONTENT

[0003] In view of the technical problem that the measurement characteristics of existing electronic gas meter under medium component and high-low temperature special conditions are different, and conventional gas meter calibrating device cannot realize flexible adjustment to medium temperature, leading to the inability to simulate the actual application conditions of gas meter, the utility model provides a kind of wide temperature range gas flowmeter calibrating device of natural gas component adjustable.

[0004] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0005] The natural gas component adjustable wide temperature range gas flowmeter calibration device, including gas distribution assembly, pressure flow controller, dehumidifier, refrigerator, first heat exchanger, thermostat, second heat exchanger, standard table assembly, compressor, condenser, pressure tank and controller, the gas distribution assembly includes gas mixer and with gas mixer internal communication online chromatographic analyzer, the gas outlet of the gas mixer is connected with pressure flow controller and dehumidifier in sequence through pipeline, the gas outlet of the dehumidifier is connected with the gas inlet of refrigerator and first heat exchanger through pipeline in parallel, the gas inlet pipeline of the refrigerator and first heat exchanger is connected with switch valve, the thermostat is equipped with heating refrigeration pipe and multiple series of detected gas meters, temperature sensor and pressure sensor are connected on the pipeline between series adjacent detected gas meters, the gas inlet of the multiple series of detected gas meters is connected with the gas outlet of the refrigerator and first heat exchanger through pipeline, the gas outlet of the multiple series of detected gas meters is connected with the gas inlet of second heat exchanger through pipeline, the standard table assembly includes standard gas meter, temperature sensor and pressure sensor, the gas outlet of the second heat exchanger is connected with the gas inlet of standard gas meter through pipeline, the temperature sensor and pressure sensor in the standard table assembly are connected on the gas inlet pipeline of standard gas meter, the gas outlet of the standard gas meter is connected with compressor, condenser and pressure tank in sequence through pipeline, the gas outlet of the pressure tank is connected with the gas inlet of gas mixer through pipeline, the controller is electrically connected with each electrical device in the thermostat and standard table assembly and pressure flow controller, compressor, condenser and pressure tank respectively.

[0006] Compared with the prior art, the natural gas component adjustable wide temperature range gas flowmeter calibration device provided by the utility model works, first realizes the proportion adjustment of the natural gas component in the gas mixer through the existing ways such as ultrasonic atomization or vortex stirring, simultaneously corrects the mixing deviation through the feedback control of the online chromatographic analyzer, then the mixed natural gas in the gas mixer is first adjusted by the pressure flow controller to enter the natural gas pressure and flow of the circulating loop and the dehumidification treatment of the dehumidifier, after that, the natural gas is cooled by the refrigerator or heated by the first heat exchanger to make the temperature of the natural gas reach the preset temperature, then the heated or cooled natural gas passes through a plurality of serially connected metered gas meters, flows out to the heat exchanger outside the thermostat box to exchange heat, after the heat exchange, the natural gas flows through the standard gas meter in the standard meter assembly, then returns to the gas mixer after being compressed by the compressor, cooled by the condenser and maintained by the pressure stabilizing tank, the whole device forms a loop, realizes the adjustable natural gas component, the controllable temperature in a wide range and the recyclable natural gas (forms a loop, is recycled as the calibration gas, realizes the saving of resources); the controller can collect the data of various electrical devices such as the temperature sensor, the pressure sensor, the metered gas meter, the standard gas meter and the like in the thermostat box and the standard meter assembly, compare with the measurement deviation under different temperature, pressure and flow combination stored in the controller in advance, automatically triggers the early warning when the on-site data exceeds the measurement deviation, and adjusts and controls the pressure flow controller, the compressor, the condenser and the pressure stabilizing tank. 3 The device places the metered gas meter in the thermostat box, the temperature in the thermostat box can be heated by the heating and refrigeration pipe, thereby simulating the high and low temperature actual application working condition of the existing electronic gas meter, that is, fully simulating the flow metering performance of the metered gas meter under the actual application working condition, at the same time, the working medium of the device is the natural gas with adjustable component, and the temperature of the natural gas can be changed by the refrigerator or the first heat exchanger, thereby realizing the detection of the electronic gas meter under the environment with the maximum flow of 0.02-150 m 3 / h and the temperature range of-20-60 DEG C, meeting the performance improvement demand of the electronic gas meter under the special working condition, especially under the high and low temperature condition, and finally improving the comprehensive performance of the electronic gas meter product.

[0007] Further, the gas mixer is provided with a hydrogen sulfide injection pipe.

[0008] Further, the thermostat box is provided with a temperature display, the heating and refrigeration pipe and the metered gas meter are arranged on the wall of the thermostat box, and the metered gas meter is located above the heating and refrigeration pipe.

[0009] Further, the standard meter assembly comprises three standard gas meters with different ranges arranged in parallel, and a pneumatic valve is connected to the gas inlet pipe of each standard gas meter, the gas inlet of each pneumatic valve is connected to the gas outlet of the first manifold, the gas inlet of the first manifold is connected to the gas outlet of the second heat exchanger through a ball valve, and the gas outlet of each standard gas meter is connected to the compressor through a second manifold. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a structure schematic diagram of the natural gas component adjustable wide temperature range gas flowmeter calibration device.

[0011] In the figure, 1 is a gas distribution assembly, 101 is a gas mixer, 102 is a hydrogen sulfide injection pipe, 2 is a pressure flow controller, 3 is a dehumidifier, 4 is a refrigerator, 5 is a first heat exchanger, 6 is a constant temperature box, 61 is a heating refrigeration pipe, 62 is a detected gas meter, 7 is a second heat exchanger, 8 is a standard meter assembly, 81 is a standard gas meter, 82 is a pneumatic valve, 9 is a compressor, 10 is a condenser, 11 is a pressure stabilizing tank, 12 is a controller, 13 is a switch valve, 14 is a first manifold, 15 is a ball valve, and 16 is a second manifold. DETAILED DESCRIPTION

[0012] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific drawings.

[0013] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0014] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0015] Please refer to Figure 1As shown, the utility model provides a kind of natural gas component adjustable wide temperature range gas flowmeter calibrating device, including gas distribution assembly 1, pressure flow controller 2, dehumidifier 3, refrigerator 4, first heat exchanger 5, thermostat 6, second heat exchanger 7, standard table assembly 8, compressor 9, condenser 10, pressure tank 11 and controller 12, the gas distribution assembly 1 includes gas mixer 101 and with the internal communication of gas mixer 101 online chromatographic analyzer (not shown in drawing), the specific structure and working principle of gas mixer 101, online chromatographic analyzer, pressure flow controller 2, dehumidifier 3, refrigerator 4, first heat exchanger 5, second heat exchanger 7, compressor 9, condenser 10, pressure tank 11 and controller 12 are the prior art known to those skilled in the art, thus no longer repeat here, and since the above each hardware is mature hardware, thus for the assembly connection of ordinary skill in the art person it is very easy;The gas outlet of gas mixer 101 is connected with pressure flow controller 2 and dehumidifier 3 in sequence by pipeline, the pressure flow controller 2 is used to adjust the natural gas pressure and flow of entering circulation loop, the gas outlet of dehumidifier 3 is connected with the gas inlet of refrigerator 4 and first heat exchanger 5 by pipeline in parallel, i.e. the refrigerator 4 and first heat exchanger 5 are connected with the gas outlet of dehumidifier 3 in parallel, switch valve 13 is connected on the gas inlet pipeline of refrigerator 4 and first heat exchanger 5, whereby can be according to the need of calibration, the natural gas after dehumidification of dehumidifier 3 is cooled by refrigerator 4 or heated by first heat exchanger 5, to make the gas temperature entering gas table more balanced, thermostat 6 is equipped with heating refrigeration pipe 61 and multiple series of detected gas table 62, temperature sensor T and pressure sensor P are connected on the pipeline between series adjacent detected gas table 62, the heating refrigeration pipe 61 is a kind of integrated heating and refrigeration function active temperature control device, realizes the accurate refrigeration and heating two-way adjustment of temperature in same pipeline or component by current direction control, air flow separation or water circulation heat exchange etc. Technical means, specific structure and working principle are the prior art known to those skilled in the art, no longer repeat here;The gas inlets of the multiple serially connected gas meters 62 are connected to the outlet of the refrigerator 4 and the first heat exchanger 5 through pipes, the gas outlets of the multiple serially connected gas meters 62 are connected to the gas inlet of the second heat exchanger 7 through pipes, the standard meter assembly 8 comprises a standard gas meter 81, a temperature sensor T and a pressure sensor P, the gas outlet of the second heat exchanger 7 is connected to the gas inlet of the standard gas meter 81 through a pipe, the temperature sensor T and the pressure sensor P in the standard meter assembly 8 are connected to the gas inlet pipe of the standard gas meter 81, the temperature sensor T and the pressure sensor P are used to measure the gas temperature and pressure in the corresponding pipe, the gas outlet of the standard gas meter 81 is connected to the compressor 9, the condenser 10 and the pressure stabilizing tank 11 in sequence through pipes, the gas outlet of the pressure stabilizing tank 11 is connected to the gas inlet of the gas mixer 101 through a pipe, the compressor 9 is used to compress the low-pressure gas after flowing out of the standard gas meter 81 into high-temperature and high-pressure gas to provide pressure for the subsequent natural gas recycling, the condenser 10 is used to cool the high-temperature and high-pressure natural gas to the same temperature as the natural gas stored in the gas mixer 101, the pressure stabilizing tank 11 is used to maintain the pressure of the natural gas entering the gas mixer 101 constant, the controller 12 is electrically connected to each electrical device in the thermostat 6 and the standard meter assembly 8, such as the temperature sensor, the pressure sensor, the gas meter, the standard gas meter and the pressure flow controller 2, the compressor 9, the condenser 10 and the pressure stabilizing tank 11, to realize traditional data acquisition and control, and the controller 9 can be specifically a programmable logic controller.

[0016] Compared with the prior art, the natural gas component adjustable wide temperature range gas flowmeter calibration device provided by the utility model works, first, the proportion of the natural gas component is adjusted in the gas mixer through existing methods such as ultrasonic atomization or vortex stirring, meanwhile, the mixed deviation is corrected through feedback control of the online chromatographic analyzer, then the mixed natural gas in the gas mixer is adjusted by the pressure flow controller to enter the natural gas pressure and flow in the circulating loop and the dehumidifier dehumidification treatment, after that, the natural gas is cooled by the refrigerator or heated by the first heat exchanger to reach the preset temperature, then the heated or cooled natural gas passes through multiple serially connected metered gas meters, flows out to the heat exchanger outside the thermostat for heat exchange, after the heat exchange, the natural gas flows through the standard gas meter in the standard meter assembly, then sequentially returns to the gas mixer after being compressed by the compressor, cooled by the condenser and maintained by the pressure stabilizing tank, the whole device forms a loop, the natural gas component is adjustable, the temperature is controllable in a wide range, and the natural gas gas is recyclable (forms a loop, is recycled as a calibration gas, and resource saving is realized); the controller can collect the data of various electrical devices such as the temperature sensor, the pressure sensor, the metered gas meter and the standard gas meter in the thermostat and the standard meter assembly, compare the data with the measurement deviation under different temperature, pressure and flow combinations stored in the controller in advance, automatically trigger the early warning when the on-site data exceeds the measurement deviation, and adjust and control the pressure flow controller, the compressor, the condenser and the pressure stabilizing tank. 3 The device places the metered gas meter in the thermostat, the temperature in the thermostat can be heated by the heating and refrigeration pipe, thereby simulating the high and low temperature actual application working condition of the existing electronic gas meter, that is, fully simulating the flow metering performance of the metered gas meter under the actual application working condition, at the same time, the working medium of the device is the natural gas with adjustable component, and the temperature of the natural gas can be changed by the refrigerator or the first heat exchanger, thereby realizing the detection of the electronic gas meter under the environment with the maximum flow of 0.02-150 m 3 / h and the temperature range of-20-60 DEG C, meeting the performance improvement demand of the electronic gas meter under the special working condition, especially under the high and low temperature condition, and finally improving the comprehensive metering performance of the electronic gas meter product.

[0017] As a specific embodiment, refer to Figure 1 The gas mixer 101 is provided with a hydrogen sulfide (H2S) injection pipe 102, thereby the trace (0-100 ppm) hydrogen sulfide can be injected into the gas mixer 101 to simulate the sulfur-containing natural gas. Of course, the skilled in the art can also inject other corrosive gases to form the mixed gas on the basis of the foregoing embodiment.

[0018] As a specific embodiment, refer to Figure 1As shown in the figure, the thermostat 6 is provided with a temperature display for displaying the temperature in the thermostat 6 after the heating and refrigeration of the heating and refrigeration pipe 61, which is the actual application working condition simulation temperature of the detected gas meter 62; the heating and refrigeration pipe 61 and the detected gas meter 62 are arranged on the wall of the thermostat 6, and the detected gas meter 62 is located above the heating and refrigeration pipe 61, so as to fully simulate the actual application working condition environment temperature of the detected gas meter 62.

[0019] As a specific embodiment, the pipe interface between the series adjacent detected gas meters 62 is a magnetic sealing interface, so as to meet the rapid connection and switching of different types of gas meters such as diaphragm meters and ultrasonic meters.

[0020] As a specific embodiment, please refer to Figure 1 As shown in the figure, the standard meter assembly 8 includes three standard gas meters 81 with different ranges arranged in parallel, and each standard gas meter 81 is connected with a pneumatic valve 82 on the gas inlet pipe, the gas inlet of each pneumatic valve 82 is connected with the gas outlet of the first manifold 14, the gas inlet of the first manifold 14 is connected with the gas outlet of the second heat exchanger 7 through the ball valve 15, and the gas outlet of each standard gas meter 81 is connected with the compressor 9 through the second manifold 16, so that the three standard gas meters 81 with different ranges work independently in the environment outside the thermostat 6, and then for different flow ranges, the corresponding range standard gas meter can be controlled and connected through the pneumatic valve 82 to measure the flow, so that the measurement result is more real and reliable.

[0021] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A natural gas component adjustable wide temperature range gas flow meter prover apparatus characterized by, The gas distribution assembly includes a gas mixer and an online chromatographic analyzer in internal communication with the gas mixer, the gas outlet of the gas mixer is connected with the pressure flow controller and the dehumidifier in sequence through pipelines, the gas outlet of the dehumidifier is connected with the gas inlets of the refrigerating device and the first heat exchanger through pipelines in parallel, the gas inlets of the refrigerating device and the first heat exchanger are connected with a switch valve through pipelines, the heating and refrigerating pipe and a plurality of serially connected detected gas meters are arranged in the thermostat, temperature sensors and pressure sensors are connected with the pipelines between the serially connected adjacent detected gas meters, the gas inlets of the plurality of serially connected detected gas meters are connected with the gas outlets of the refrigerating device and the first heat exchanger through pipelines, the gas outlets of the plurality of serially connected detected gas meters are connected with the gas inlet of the second heat exchanger through pipelines, the standard meter assembly includes a standard gas meter, temperature sensors and pressure sensors, the gas outlet of the second heat exchanger is connected with the gas inlet of the standard gas meter through a pipeline, the temperature sensors and the pressure sensors in the standard meter assembly are connected with the gas inlet pipeline of the standard gas meter, the gas outlet of the standard gas meter is connected with the compressor, the condenser and the pressure tank in sequence through pipelines, the gas outlet of the pressure tank is connected with the gas inlet of the gas mixer through a pipeline, and the controller is electrically connected with each electrical device in the thermostat and the standard meter assembly, and the pressure flow controller, the compressor, the condenser and the pressure tank.

2. The natural gas component adjustable wide temperature range gas flow meter proving device of claim 1, wherein, The gas mixer is provided with a hydrogen sulfide injection pipe.

3. The natural gas component adjustable wide temperature range gas flow meter proving device of claim 1, wherein, The thermostat is provided with a temperature display, the heating and refrigerating pipe and the detected gas meters are arranged on the wall of the thermostat, and the detected gas meters are arranged above the heating and refrigerating pipe.

4. The natural gas component adjustable wide temperature range gas flow meter proving device of claim 1, wherein, The standard meter assembly includes three standard gas meters with different scales arranged in parallel, a pneumatic valve is connected with the gas inlet pipeline of each standard gas meter, the gas inlets of the pneumatic valves are connected with the gas outlet of a first manifold, the gas inlet of the first manifold is connected with the gas outlet of the second heat exchanger through a ball valve, and the gas outlets of the standard gas meters are connected with the compressor through a second manifold. The gas mixer is provided with a hydrogen sulfide injection pipe. The thermostat is provided with a temperature display, the heating and refrigerating pipe and the detected gas meters are arranged on the wall of the thermostat, and the detected gas meters are arranged above the heating and refrigerating pipe. The standard meter assembly includes three standard gas meters with different scales arranged in parallel, a pneumatic valve is connected with the gas inlet pipeline of each standard gas meter, the gas inlets of the pneumatic valves are connected with the gas outlet of a first manifold, the gas inlet of the first manifold is connected with the gas outlet of the second heat exchanger through a ball valve, and the gas outlets of the standard gas meters are connected with the compressor through a second manifold.

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