Flow data acquisition controller

Abstract

The utility model relates to the technical field of electronic instruments and meters, and discloses a flow data acquisition controller which comprises a control unit and an intermediate connection unit, and the control unit is connected with a tested device through the intermediate connection unit. The intermediate connection unit comprises a power supply module, an isolation module, a power supply conversion module and an analog quantity acquisition module; the power supply conversion module is connected with the analog quantity acquisition module; the power supply module is respectively connected with the isolation module, the power supply conversion module and the analog quantity acquisition module; the control unit is connected with the isolation module, the power supply conversion module and the analog quantity acquisition module. According to the utility model, the flow data of the gas industry can be collected, the adaptability is high, and the flow meter can be adapted to most common flow meters in the current market; the power supply and communication are isolated, so that the stability of the product is improved; when abnormal conditions occur, the pipeline can be cut off in time, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic instruments and meters, in particular to a flow data acquisition controller. Background Art

[0002] In the gas industry, a flow data acquisition controller is a device specifically used for collecting and processing flow data in a gas system. It usually uses sensors for detection. Through flow sensors (such as turbine flow meters, ultrasonic flow meters, etc.) installed on gas pipelines, the flow data of gas is detected in real time. However, for equipment or instruments used in industrial sites such as the gas industry, a large amount of flow data cannot be uploaded wirelessly and needs to be collected manually, resulting in low efficiency and high labor costs. Moreover, the pipeline cannot be cut off in a timely manner when abnormal situations occur. Content of the Utility Model

[0003] To make up for the above deficiencies, the utility model provides a flow data acquisition controller.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A flow data acquisition controller includes a control unit and an intermediate connection unit. The control unit is connected to the device under test through the intermediate connection unit. The intermediate connection unit includes a power supply module, an isolation module, a power conversion module, and an analog quantity acquisition module. The power conversion module is connected to the analog quantity acquisition module. The power supply module is respectively connected to the isolation module, the power conversion module, and the analog quantity acquisition module. The control unit is respectively connected to the isolation module, the power conversion module, and the analog quantity acquisition module. The control unit is provided with a display screen and control buttons. The display screen is used for displaying data, and the control buttons are used for selecting the communication protocol type and controlling the solenoid valve switch.

[0006] Further, the intermediate connection unit is installed in an explosion-proof box.

[0007] Further, the explosion-proof box includes an explosion-proof box housing and an explosion-proof box cover. The explosion-proof box cover is fixed to the explosion-proof box housing by screws and sealed by a sealing ring. The explosion-proof box housing is provided with an external connection joint. Through the external connection joint, the control unit and the intermediate connection unit are connected, and the intermediate connection unit and the device under test are connected.

[0008] Further, the external connection joint includes a mains joint, a flow meter joint, a solenoid valve joint, a grounding joint, a control unit power supply joint, a communication interface, and a solenoid valve control joint.

[0009] Further, the isolation module includes a first isolator and a second isolator, and both the first isolator and the second isolator are 485 safety isolators.

[0010] Further, a wireless communication module is also provided in the control unit, and the wireless communication module is used for data uploading and receiving instruction issuing.

[0011] The utility model has the following beneficial effects: the utility model can collect the flow data of the gas industry, has high adaptability, and can adapt to most commonly used flow meters in the current market; and by isolating the power supply and communication, the stability of the product is improved; when an abnormal situation occurs, the pipeline can be cut off in time to improve safety. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the utility model;

[0013] Figure 2 is a schematic diagram of the explosion-proof box lid;

[0014] Figure 3 is a schematic structural diagram of the intermediate connection unit;

[0015] Figure 4 is a schematic diagram of the physical installation of the utility model;

[0016] Figure 5 is a schematic circuit diagram of communication protocol selection;

[0017] Figure 6 is a schematic circuit diagram of controlling the solenoid valve to cut off;

[0018] Description of the Drawings: 1. Explosion-proof box lid; 2. Screw; 3. Power supply module; 4. Isolation module; 41. First isolator; 42. Second isolator; 5. Sealing ring; 6. Power conversion module; 7. Analog quantity acquisition module; 8. Explosion-proof box housing; 9. Control unit; 10. Solenoid valve control joint; 11. First communication interface; 12. Second communication interface; 13. Control unit power supply joint; 14. Solenoid valve joint; 15. First flow meter joint; 16. Second flow meter joint; 17. Mains power joint. Detailed Embodiments

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] An embodiment provided by the present utility model: Refer to Figure 1 、 Figure 2 、Figure 3 and Figure 4 , a flow data acquisition controller, comprising a control unit 9 and an intermediate connection unit, wherein the control unit 9 is connected to a device under test through the intermediate connection unit; the intermediate connection unit includes a power module 3, an isolation module 4, a power conversion module 6 and an analog quantity acquisition module 7; the power conversion module 6 is connected to the analog quantity acquisition module 7; the power module 3 is respectively connected to the isolation module 4, the power conversion module 6 and the analog quantity acquisition module 7; the control unit 9 is respectively connected to the isolation module 4, the power conversion module 6 and the analog quantity acquisition module 7. The intermediate connection unit is installed in an explosion-proof box. The explosion-proof box includes an explosion-proof box housing 8 and an explosion-proof box cover 1, the explosion-proof box cover 1 is fixed to the explosion-proof box housing 8 by screws 2 and sealed by a sealing ring 5; the explosion-proof box housing 8 is provided with an external connection joint, and the control unit 9 and the intermediate connection unit are connected through the external connection joint, and the intermediate connection unit is connected to the device under test.

[0021] Wherein, the isolation module 4 includes a first isolator 41 and a second isolator 42, and both the first isolator 41 and the second isolator 42 are 485 safety isolators. The control unit is provided with a display screen and control buttons, the display screen is used for displaying data, and the control buttons are used for selecting the communication protocol type and controlling the solenoid valve switch. A wireless communication module is further arranged in the control unit, and the wireless communication module is used for uploading data and receiving the issuance of instructions.

[0022] In this embodiment, as Figure 5 shown, the acquisition of flow data is connected to a flowmeter device through a 485 interface, and the address of the flowmeter and the device data protocol type are set on the device; this circuit converts the serial port of the single-chip microcomputer into a 485 interface, connects to an external flowmeter to read data, and the flow data acquisition controller will read the data.

[0023] In this embodiment, as Figure 6 shown, the control signal for the solenoid valve is input to GPIO_k1 or GPIO_k2 to control the triode to turn on, and the opening and closing of the relay are controlled to achieve the opening and closing of the solenoid valve. The main function of this circuit is to increase the driving ability of the control; Figure 6 In, there are two-way DO outputs (relay outputs). Among them, F4 and F5 use 3A / 24V self-recovery fuses, and K1 and K2 relays use HF46F-G / 5-HS1; R12 and R25 are 100Ω current-limiting resistors with a package size of 1812; R14 and R28 are 1K current-limiting resistors, R16 and R29 are 10K resistors, diodes D13 and D16 use Schottky diodes, and the tvs tube uses the model SMAJ26CA.

[0024] In this embodiment, the technical requirements of some modules are as follows: Power supply module 3: AC220V; Explosion-proof box: Explosion-proof grade Ex ib IIC T3 Gb, protection grade IP67, size 230mm * 230mm * 180mm, material ADC12; Control unit 9: size 195mm * 163mm * 163mm; Screw 2: M6 internal hexagon socket head screw, 12 pieces, material 304 stainless steel screw; Sealing ring 5: material is rubber; Analog acquisition module 7: material is EVA foam gasket.

[0025] In this embodiment, the explosion-proof box is provided with a plurality of external connection joints. Specifically, it includes:

[0026] Mains power connector 17, which is a 3-core wire and is connected to the power supply module 3;

[0027] Two flowmeter connectors with 4-core wires, the first flowmeter connector 15 and the second flowmeter connector 16. The first flowmeter connector 15 is connected to the first isolator 41, and the second flowmeter connector 16 is connected to the second isolator 42;

[0028] Solenoid valve connector 14, which is provided with 2-way DO and 4-way DO, and each way is a 3-core wire and is connected to the power conversion module 6;

[0029] Control unit power connector 13, which is connected to the power conversion module 6 and is a 2-core wire;

[0030] Two communication interfaces with 2-core wires, the first communication interface 11 and the second communication interface 12. The first communication interface 11 is connected to the first isolator 41, and the second communication interface 12 is connected to the second isolator 42;

[0031] Solenoid valve control connector 10, which is connected to the source conversion module 6 and the analog acquisition module 7.

[0032] Grounding connector, 04 - 20mA, for grounding.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0034] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0035] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A flow data acquisition controller, characterized in that: It comprises a control unit and an intermediate connection unit, wherein the control unit is connected to the device under test via the intermediate connection unit; the intermediate connection unit comprises a power module, an isolation module, a power conversion module and an analog quantity acquisition module; the power conversion module is connected to the analog quantity acquisition module; the power module is respectively connected to the isolation module, the power conversion module and the analog quantity acquisition module; the control unit is respectively connected to the isolation module, the power conversion module and the analog quantity acquisition module; the control unit is provided with a display screen and a control button, wherein the display screen is used to display data, and the control button is used to select the communication protocol type and control the solenoid valve switch.

2. A flow data acquisition controller according to claim 1, characterized in that: The intermediate connection unit is installed in an explosion-proof box.

3. A flow data acquisition controller according to claim 2, characterized in that: The explosion-proof box includes an explosion-proof box shell and an explosion-proof box cover, wherein the explosion-proof box cover is fixed to the explosion-proof box shell by screws and sealed by a sealing ring; the explosion-proof box shell is provided with an external connecting joint, through which the control unit and the intermediate connecting unit are connected, and the intermediate connecting unit is connected to the device under test.

4. A flow data acquisition controller according to claim 3, characterized in that: The external connection connectors include a mains connector, a flow meter connector, a solenoid valve connector, a ground connector, a control unit power connector, a communication interface and a solenoid valve control connector.

5. A flow data acquisition controller according to claim 1, characterized in that: The isolation module includes a first isolator and a second isolator, and both the first isolator and the second isolator are 485 safety isolation barriers.

6. A flow data acquisition controller according to claim 1, characterized in that: The control unit is also provided with a wireless communication module, and the wireless communication module is used for uploading data and receiving instructions.

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