Fuel gas metering instrument evaluation system

Abstract

The utility model belongs to the technical field of gas meter evaluation, and particularly relates to a gas meter evaluation system. Comprising a pressure regulating box, the gas inlet end of the pressure regulating box is connected with an external gas pipeline, the gas outlet end of the pressure regulating box is connected with an evaluation unit, the evaluation unit comprises a main pipeline, the gas inlet end of the main pipeline is connected with the gas outlet end of the pressure regulating box, and the gas outlet end of the main pipeline is connected with the gas inlet end of a transition pipeline. The exhaust end of the transition pipeline is connected with the air inlet ends of a plurality of evaluation pipelines which are arranged in parallel, the exhaust ends of the plurality of evaluation pipelines are respectively connected with the air inlet end of the return pipeline, the exhaust end of the return pipeline is connected with the exhaust end of the main pipeline and the air inlet end of the transition pipeline, and the main pipeline is provided with a first ball valve. The transition pipeline is provided with a gas pump, each evaluation pipeline is provided with a pressure gauge, a plurality of to-be-evaluated device interfaces and a bleeder, and the return pipeline is provided with a surge tank. According to the method, the evaluation period can be greatly shortened, the working efficiency is remarkably improved, the application range of the system is greatly expanded, and the low-efficiency mode of one-by-one evaluation of a traditional single device is changed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of gas metering instrument evaluation, specifically relates to a gas metering instrument evaluation system. BACKGROUND

[0002] The product of gas metering instrument category is used as the appliance of measuring gas use amount, is widely used in each field such as civil and commercial use etc. Its accuracy, stability and reliability of measurement have vital significance to the benefit of gas supply and demand parties, ensure gas safety use etc. Therefore, the comprehensive and accurate evaluation of gas meter is an important link in the production, use and supervision process of gas meter.

[0003] The existing gas meter evaluation system is mostly designed for single type of gas metering instrument, such as the patent with the application number "202421138663.5 " discloses a kind of ultrasonic gas meter pulsating flow durability evaluation device, the device only adopts a fixed diameter pipeline, cannot be flexibly adjusted to adapt to the evaluation needs of different types of gas meter. And each pipeline can only evaluate one gas metering instrument. This way not only is inefficient when facing large-scale evaluation needs, but also lacks flexibility and versatility, cannot meet the diversification needs of the evaluation system of the developing gas metering instrument market. Therefore, there is still the necessity of further improvement for the prior art. SUMMARY

[0004] The utility model aims at providing a kind of gas metering instrument evaluation system, can effectively improve the flexibility of evaluation system, reduce evaluation cost.

[0005] To achieve the above object, the technical scheme of the utility model is as follows:

[0006] A kind of gas metering instrument evaluation system, including pressure regulating tank, the gas inlet end of the pressure regulating tank is connected with external gas pipeline, the gas outlet end of the pressure regulating tank is connected with evaluation unit, the evaluation unit includes main pipeline, the gas inlet end of the main pipeline is connected with the gas outlet end of pressure regulating tank, the gas outlet end of the main pipeline is connected with the gas inlet end of transition pipeline, the gas outlet end of the transition pipeline is connected with the gas inlet end of a plurality of parallelly arranged evaluation pipeline, the gas outlet end of the plurality of evaluation pipeline is respectively connected with the gas inlet end of backflow pipeline, the gas outlet end of the backflow pipeline is connected with the gas outlet end of main pipeline and the gas inlet end of transition pipeline, control valve is respectively arranged on the main pipeline, transition pipeline, evaluation pipeline and backflow pipeline, gas pump is arranged on the transition pipeline, pressure gauge, a plurality of to be evaluated device interfaces and diffusion pipe are respectively arranged on each evaluation pipeline, pressure stabilizing tank is arranged on the backflow pipeline;It also includes controller, the control valve, pressure regulating tank, pressure stabilizing tank, gas pump, pressure gauge and diffusion pipe are electrically connected with the controller.

[0007] Further, the pressure regulating tank comprises at least two, and the gas inlet end of each pressure regulating tank is connected with an external gas pipeline, and the gas outlet end is connected with an evaluation unit respectively.

[0008] Further, the diameter of each evaluation pipeline is different.

[0009] Further, the main pipeline is provided with a first control valve, the transition pipeline is provided with a second control valve, the return pipeline is provided with a third control valve, the gas inlet end of each evaluation pipeline is provided with a fourth ball valve, and the gas outlet end is provided with a fifth ball valve, and the first control valve, the second control valve, the third control valve, the fourth control valve and the fifth control valve are electrically connected with the controller.

[0010] Further, the control valve is a ball valve.

[0011] Further, the bracket is further provided with a spraying device, and the spraying device is electrically connected with the controller.

[0012] Further, the bracket is further provided with an infrared sensor and an alarm device, and the infrared sensor and the alarm device are electrically connected with the controller.

[0013] Further, the bracket is further provided with a solar simulator, and the solar simulator is electrically connected with the controller.

[0014] Compared with the prior art, the utility model discloses a plurality of to be evaluated device interfaces are arranged on one evaluation pipeline, realizes that a plurality of same type gas metering instruments carry out evaluation work simultaneously, and through the parallel connection of a plurality of different specifications and models of evaluation pipelines, the simultaneous evaluation of a plurality of gas metering instruments with the same pressure demand and different flow demand is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structural schematic diagram of the utility model;

[0016] In the drawing: 1, pressure regulating tank;1.1, first pressure regulating tank;1.2, second pressure regulating tank;2, gas pump;3, pressure gauge;4, diffusion pipe;5, pressure stabilizing tank;6, main pipeline;7, transition pipeline;8, evaluation pipeline;9, return pipeline;10, first ball valve;11, second ball valve;12, third ball valve;13, fourth ball valve;14, fifth ball valve;15, external gas pipeline. DETAILED DESCRIPTION

[0017] Embodiment 1

[0018] It should be apparent that the described embodiments are only a part of the embodiments of the present application, and are not all the embodiments. The terms such as "upper", "lower", "left", "right" and the like in the specification are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship without substantial change of the technical content is also regarded as the scope of the present application.

[0019] The embodiment provides a gas metering instrument evaluation system, which comprises a pressure regulating box, the pressure regulating box only comprises a first pressure regulating box 1.1, the gas inlet end of the first pressure regulating box 1.1 is connected with an external gas pipeline 15, the gas outlet pipe of the first pressure regulating box 1.1 is connected with a first evaluation unit, the first evaluation unit comprises a main pipeline 6, the gas inlet end of the main pipeline 6 is connected with the gas outlet end of the first pressure regulating box 1.1, the gas outlet end of the main pipeline 6 is connected with the gas inlet end of a transition pipeline 7, the gas outlet end of the transition pipeline 7 is connected with the gas inlet end of two parallel evaluation pipelines 8, the gas outlet end of the two evaluation pipelines 8 is connected with the gas inlet end of a backflow pipeline 9, the gas outlet end of the backflow pipeline 9 is connected with the gas outlet end of the main pipeline 6 and the gas inlet end of the transition pipeline 7, a first ball valve 10 is arranged on the main pipeline 6, a gas pump 2 and a second ball valve 11 are arranged on the transition pipeline 7, a fourth ball valve 13, a pressure gauge 3, a plurality of to-be-evaluated device interfaces, a diffusion pipe 4 and a fifth ball valve 14 are sequentially arranged on each evaluation pipeline 8, and a third ball valve 12 and a pressure stabilizing tank 5 are arranged on the backflow pipeline 9; the two evaluation pipelines 8 adopt pipelines with DN15 and DN25 (Diameter Nominal, nominal diameter) specifications respectively, the to-be-evaluated device interfaces are gas meter interfaces, the DN15 evaluation pipeline is used for evaluation of a domestic gas meter, and the DN25 evaluation pipeline is used for evaluation of a commercial gas meter.

[0020] The evaluation system further comprises a controller, and the first ball valve 10, the second ball valve 11, the third ball valve 12, the fourth ball valve 13, the fifth ball valve 14, the pressure regulating box 1, the pressure stabilizing tank 5, the gas pump 2, the pressure gauge 3 and the diffusion pipe 4 are electrically connected with the controller.

[0021] The embodiment realizes simultaneous evaluation of multiple gas metering instruments of the same type by arranging multiple to-be-evaluated device interfaces on one evaluation pipeline, and realizes simultaneous evaluation of multiple gas metering instruments with the same pressure demand and different flow demand by arranging multiple evaluation pipelines with different specifications in parallel.

[0022] Embodiment 2

[0023] This embodiment provides a gas metering instrument evaluation system, such as... Figure 1 As shown, the system includes a pressure regulating box, comprising a first pressure regulating box 1.1 and a second pressure regulating box 1.2. The inlet ends of the first and second pressure regulating boxes 1.1 and 1.2 are connected to an external gas pipeline 15. The exhaust pipe of the first pressure regulating box 1.1 is connected to a first evaluation unit, and the exhaust pipe of the second pressure regulating box 1.2 is connected to a second evaluation unit. Both the first and second evaluation units include a main pipeline 6. The inlet end of the main pipeline 6 is connected to the exhaust end of the pressure regulating box 1. The exhaust end of the main pipeline 6 is connected to the inlet end of a transition pipeline 7. The exhaust end of the transition pipeline 7 is connected to the inlet ends of multiple parallel evaluation pipelines 8. The exhaust ends of the multiple evaluation pipelines 8 are connected to a return pipeline. The inlet end of the return pipeline 9 is connected to the exhaust end of the main pipeline 6 and the inlet end of the transition pipeline 7. The main pipeline 6 is equipped with a first ball valve 10, and the transition pipeline 7 is equipped with a gas pump 2 and a second ball valve 11. Each evaluation pipeline 8 is equipped with a fourth ball valve 13, a pressure gauge 3, several interfaces of devices to be evaluated, a vent pipe 4, and a fifth ball valve 14 in sequence. The return pipeline 9 is equipped with a pressure stabilizing tank 5 and a third ball valve 12. The difference between the first evaluation unit and the second evaluation unit is that two evaluation pipelines 8 are arranged in parallel in the first evaluation unit. The two evaluation pipelines 8 adopt DN15 and DN25 (Diameter Nominal) pipes respectively. The interface of the device to be evaluated is a gas meter interface. The DN15 evaluation pipeline is used for evaluating residential gas meters, and the DN25 evaluation pipeline is used for evaluating commercial gas meters. The second evaluation unit has three evaluation pipelines 8 arranged in parallel. The three evaluation pipelines 8 adopt DN50, DN80 and DN100 specifications respectively. The interface of the device to be evaluated is a gas flow meter interface. The three pipelines of different specifications can be used to evaluate at least three types of gas flow meters.

[0024] It also includes a controller, and the first ball valve 10, the second ball valve 11, the third ball valve 12, the fourth ball valve 13, the fifth ball valve 14, the pressure regulating box 1, the pressure stabilizing tank 5, the gas pump 2, the pressure gauge 3 and the vent pipe 4 are all electrically connected to the controller.

[0025] When gas meter testing begins, the system workflow is as follows:

[0026] First, connect the device to be tested to the device interface, and start the testing process after completing the preparation. Gas is output through external gas pipeline 15 to the first pressure regulating box 1.1 and the second pressure regulating box 1.2. At this time, the inlet valves of the first pressure regulating box 1.1 and the second pressure regulating box 1.2 are open to initially regulate the pressure of the external gas to meet the pressure requirements of the subsequent testing units.

[0027] Taking the first evaluation unit workflow as an example, the first ball valve 10 on the main pipeline 6 is opened, the gas after pressure regulation enters the main pipeline 6, the gas pump 2 and the second ball valve 11 on the transition pipeline 7 are opened, and the gas pump 2 starts to work to provide a gas circulation power source for the evaluation system. According to actual application requirements, the fourth ball valve 13 and the fifth ball valve 14 on the corresponding evaluation pipeline 8 are opened, at this time, the gas enters the evaluation pipeline 8 from the transition pipeline 7, passes through a plurality of to-be-evaluated devices and enters the return pipeline 9. The third ball valve 12 of the return pipeline 9 is opened, and the gas returns to the gas inlet end of the transition pipeline 7 through the return pipeline 9. The pressure gauge 3 monitors the pressure in the pipeline, and when the gas pressure in the evaluation system reaches the set threshold value, the controller closes the first ball valve 10 on the main pipeline 6.

[0028] During the evaluation process, the gas pump 2 drives the gas to circulate in the evaluation system by pressurizing the gas. The pressure gauge 3 monitors the gas pressure in the evaluation system in real time, and when the pressure gauge 3 is less than the set threshold value, the controller opens the first ball valve 10 of the main pipeline 6 and the pressure regulating tank, and timely supplements the gas from the outside; when the pressure gauge 3 is greater than the set threshold value, the controller opens the diffuser pipe 4 to discharge the excess gas, to ensure the safety of the pipeline. The pressure stabilizing tank 5 of the return pipeline 9 is kept open, which functions to stabilize the gas pressure in the evaluation system, so that the gas flow is more stable.

[0029] The embodiment can meet the simultaneous evaluation of multiple types of gas metering instruments with different pressures and different flow rates by respectively arranging the pressure regulating tank and the evaluation unit. The utility model can greatly shorten the evaluation period, significantly improve the work efficiency, greatly expand the application range of the system, and change the low-efficiency mode of traditional single-device evaluation one by one.

[0030] Embodiment 3

[0031] The embodiment further comprises a support, which is arranged above the evaluation unit, and a spraying device, a solar simulator, an infrared sensor and an alarm device are arranged on the support. The spraying device is used to provide different intensity of rainfall simulation environment for the evaluation unit, and detect the performance of the to-be-evaluated device in the rainfall environment. The solar simulator is used to simulate the solar spectrum and irradiance, and detect the performance of the to-be-evaluated device under the influence of long-term light. The infrared sensor and the alarm device are used to ensure the safety of the evaluation environment. The infrared sensor is used to monitor the gas molecules in the surrounding environment in real time, and can detect the gas leakage in time. When the gas concentration exceeds the preset safety threshold value, the alarm device will start immediately to prompt the staff to take corresponding measures in time.

[0032] The embodiment further comprises an environmental simulation technology, realizes the automation and intelligentization of the evaluation process, enriches the diversity of the evaluation content, and improves the evaluation efficiency and accuracy.

[0033] The above merely describes preferred embodiments of the present application, and thus equivalent changes or modifications made in accordance with the structure, features and principles described in the patent application scope of the present application are included in the patent application protection scope of the present application.

Claims

1. A gas metering instrument evaluation system, characterized in that, The system includes a pressure regulating box, whose inlet is connected to an external gas pipeline, and whose outlet is connected to an evaluation unit. The evaluation unit includes a main pipeline, whose inlet is connected to the outlet of the pressure regulating box, whose outlet is connected to the inlet of a transition pipeline, whose outlet is connected to the inlet of multiple parallel evaluation pipelines, whose outlets are respectively connected to the inlet of a return pipeline, and whose outlet is connected to both the outlet of the main pipeline and the inlet of the transition pipeline. Control valves are provided on the main pipeline, transition pipeline, evaluation pipeline, and return pipeline. A gas pump is provided on the transition pipeline. Each evaluation pipeline is equipped with a pressure gauge, several interfaces for devices to be evaluated, and a vent pipe. A pressure stabilizing tank is provided on the return pipeline. The system also includes a controller, and the control valves, pressure regulating box, pressure stabilizing tank, gas pump, pressure gauge, and vent pipe are all electrically connected to the controller.

2. The gas metering instrument evaluation system according to claim 1, characterized in that, The pressure regulating box includes at least two, and the inlet end of each pressure regulating box is connected to an external gas pipeline, and the exhaust end is connected to an evaluation unit.

3. The gas metering instrument evaluation system according to claim 1, characterized in that, The diameter of each test pipeline is different.

4. The gas metering instrument evaluation system according to claim 1, characterized in that, The main pipeline is equipped with a first control valve, the transition pipeline is equipped with a second control valve, the return pipeline is equipped with a third control valve, the inlet end of each evaluation pipeline is equipped with a fourth ball valve, and the exhaust end is equipped with a fifth ball valve. The first, second, third, fourth, and fifth control valves are electrically connected to the controller.

5. The gas metering instrument evaluation system according to claim 1, characterized in that, The control valve is a ball valve.

6. The gas metering instrument evaluation system according to claim 1, characterized in that, It also includes a support frame, which is located above the evaluation unit and has a spray device on it, which is electrically connected to the controller.

7. A gas metering instrument evaluation system according to claim 6, characterized in that, The bracket is also equipped with an infrared sensor and an alarm device, which are electrically connected to the controller.

8. A gas metering instrument evaluation system according to claim 6, characterized in that, The support frame is also equipped with a solar simulator, which is electrically connected to the controller.

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