Flow accumulation device

Abstract

The utility model discloses a flow accumulation device, and relates to the technical field of measurement. The device comprises a flow meter, a programmable logic controller (PLC), a selection switch and a reset button, the flow meter comprises a flow meter body and a differential pressure transmitter, the PLC comprises a power supply unit, a central processing unit, a timer, an analog quantity input unit and a switching value input unit, the flow meter body is electrically connected with the differential pressure transmitter, and the switching value input unit is electrically connected with the central processing unit. The differential pressure transmitter is electrically connected with the analog input unit, the analog input unit is electrically connected with the central processing unit, the selection switch is electrically connected with the switching value input unit, the reset button is electrically connected with the switching value input unit, the switching value input unit is electrically connected with the timer, and the timer is electrically connected with the central processing unit. The power supply unit is electrically connected with the central processor, the timer and the switching value input unit respectively; through the selection switch, the timer and the like, the accumulation time can be selected according to use requirements, and due to the fact that the accumulation time is short, the measurement accuracy is improved, and the applicability is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to measurement technical field especially relates to a flow accumulation device. BACKGROUND

[0002] Flow: refers to the quantity of fluid flowing through the pipeline section per unit time, that is, instantaneous flow, and there are many methods for measuring flow, such as throttling, velocity, pulse frequency, volume and mass.

[0003] Cumulative flow: the cumulative value of the instantaneous flow of liquid, gas and the like through a pipeline within a certain time.

[0004] Flow accumulation, also known as flow accumulation, refers to the cumulative value of the instantaneous flow of liquid, gas and the like through a pipeline within a certain time.

[0005] Flow accumulation reflects the total flow within a certain time. Generally, field instruments only record instantaneous flow, and algorithms can accumulate all flow and within 1 hour, 1 day, 1 week or even longer, so as to achieve the purpose of controlling the flow adjustment of each time period.

[0006] The existing flow measuring instrument can only accumulate all flow within 1 hour, 1 day, 1 week or even longer. Due to the long accumulation time, the measurement accuracy is low. For a specific type of flow measuring instrument, since it can only accumulate flow according to the single accumulation time set in advance, the operation flexibility is poor, and it cannot meet the adaptive adjustment according to user needs, thereby resulting in poor applicability.

[0007] Therefore, the low accuracy and poor applicability in flow measurement have become a technical problem to be solved. UTILITY MODEL CONTENT

[0008] The utility model provides a flow accumulation device, which solves the technical problems of low accuracy and poor applicability in flow measurement.

[0009] To solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0010] The utility model provides a flow accumulation device, including flowmeter, programmable controller PLC, selection switch and reset button, the flowmeter includes flowmeter body and differential pressure transmitter, the programmable controller PLC includes power unit, central processing unit, timer, analog input unit and switch input unit, the flowmeter body is connected with differential pressure transmitter electricity, differential pressure transmitter is connected with analog input unit electricity, analog input unit is connected with central processing unit electricity, selection switch is connected with switch input unit electricity, reset button is connected with switch input unit electricity, switch input unit is connected with timer electricity, timer is connected with central processing unit electricity, power unit is connected with central processing unit, timer and switch input unit electricity respectively.

[0011] Further technical solutions are that the selection switch is a four-state selection switch or a three-state selection switch.

[0012] Further technical solutions are that the central processing unit is connected with an industrial computer.

[0013] Further technical solutions are that the industrial computer is connected with a display.

[0014] Further technical solutions are that the programmable controller PLC further includes a switch output unit, the central processing unit is connected with the switch output unit, the switch output unit is connected with an alarm, and the power unit is connected with the switch output unit.

[0015] The above technical solutions have the following beneficial effects:

[0016] The utility model provides a flow accumulation device, including flowmeter, programmable controller PLC, selection switch and reset button, the flowmeter includes flowmeter body and differential pressure transmitter, the programmable controller PLC includes power unit, central processing unit, timer, analog input unit and switch input unit, the flowmeter body is connected with differential pressure transmitter electricity, differential pressure transmitter is connected with analog input unit electricity, analog input unit is connected with central processing unit electricity, selection switch is connected with switch input unit electricity, reset button is connected with switch input unit electricity, switch input unit is connected with timer electricity, timer is connected with central processing unit electricity, power unit is connected with central processing unit, timer and switch input unit electricity respectively. It can select the accumulation time according to the use needs through selection switch and timer etc., improves the measurement accuracy because of the shorter accumulation time, and the operation is more flexible and convenient, and the applicability is better.

[0017] For details, see the specific embodiment part description. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a principle block diagram of the embodiment 1 of the utility model;

[0019] Figure 2 is a principle block diagram of the embodiment 2 of the utility model. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments of the present application. The following description of at least one exemplary embodiment is merely illustrative, and is by no means intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0021] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0022] Embodiment 1:

[0023] As shown in Figure 1 The utility model discloses a flow accumulation device, including flowmeter, programmable controller PLC, selection switch, reset button, industrial computer, display and alarm, the flowmeter includes flowmeter body and differential pressure transmitter, the programmable controller PLC includes power unit, central processing unit, timer, analog input unit, on-off input unit and on-off output unit, the selection switch is four state selection switch, flowmeter body and differential pressure transmitter electricity is connected, differential pressure transmitter and analog input unit electricity is connected, analog input unit and central processing unit electricity is connected, four state selection switch and on-off input unit electricity is connected, reset button and on-off input unit electricity is connected, on-off input unit and timer electricity is connected, timer and central processing unit electricity is connected, power unit is connected with central processing unit, timer, on-off output unit and on-off input unit electricity respectively, central processing unit and on-off output unit electricity is connected, on-off output unit and alarm electricity is connected, central processing unit and industrial computer electricity is connected, industrial computer and display electricity is connected.

[0024] Programmable controller PLC adopts the PLC of Schneider.

[0025] Selection switch, four kinds of states correspond to 100 milliseconds, 1 second, 10 seconds, 1 minute respectively.

[0026] The flow meter, programmable logic controller (PLC), selector switch, reset button, industrial computer, display and alarm itself, as well as the corresponding connection technology, are existing technologies and will not be described in detail here.

[0027] Work process:

[0028] like Figure 1 As shown, when the selector switch is turned to the first position, the first state of the selector switch is communicated to the timer via the digital input unit. The timer communicates to the central processing unit every 100 milliseconds. The central processing unit obtains the instantaneous pressure difference value of the flow meter output from the flow meter via the analog input unit. The central processing unit obtains the corresponding instantaneous flow rate based on the instantaneous pressure difference value, accumulates the currently obtained instantaneous flow rate and obtains the current cumulative flow rate, informs the industrial control computer, and displays it on the monitor.

[0029] Depending on the usage requirements, when the selector switch is to the second position, the second state of the selector switch is communicated to the timer via the switch input unit. The timer then informs the central processing unit every second. The similarities will not be repeated here.

[0030] Depending on the usage requirements, when the selector switch is to the third position, the third state of the selector switch is communicated to the timer via the switch input unit. The timer then informs the central processing unit every 10 seconds. The similarities will not be repeated here.

[0031] Depending on the usage requirements, when the selector switch is turned to the fourth position, the fourth state of the selector switch is communicated to the timer via the switch input unit. The timer then informs the central processing unit every minute. The similarities will not be repeated here.

[0032] Because the sampling accumulation time can be selected as 100 milliseconds, 1 second, 10 seconds, or 1 minute according to usage needs, the shorter the sampling accumulation time, the closer the instantaneous flow rate sample value is to the true value. The error caused by flow rate changes within each sampling accumulation time is smaller, thus improving measurement accuracy. The ability to select the sampling accumulation time for flow rate accumulation makes the operation more flexible and convenient, and its applicability better.

[0033] As needed, press the reset button to notify the central processing unit (CPU). The CPU will then clear the accumulated traffic and start accumulating it again, making it more versatile.

[0034] The central processing unit compares the accumulated traffic with a pre-set threshold, and notifies the alarm to sound when the accumulated traffic exceeds the pre-set threshold.

[0035] Example 2:

[0036] like Figure 2The utility model discloses a flow accumulation device, including flowmeter, programmable controller PLC, selector switch and reset button, the flowmeter includes flowmeter body and differential pressure transmitter, the programmable controller PLC includes power unit, central processing unit, timer, analog input unit and switch input unit, the selector switch is four state selector switch, flowmeter body and differential pressure transmitter electricity is connected, differential pressure transmitter and analog input unit electricity is connected, analog input unit and central processing unit electricity is connected, four state selector switch and switch input unit electricity is connected, reset button and switch input unit electricity is connected, switch input unit and timer electricity is connected, timer and central processing unit electricity is connected, power unit is connected with central processing unit, timer and switch input unit electricity respectively.

[0037] When using, the central processing unit is connected with the industrial computer, the industrial computer is connected with the display, the power unit is connected with the switch output unit, the central processing unit is connected with the switch output unit, and the switch output unit is connected with the alarm.

[0038] Embodiment 3:

[0039] The utility model discloses a flow accumulation device, based on embodiment 2, still include industrial computer, central processing unit and industrial computer electricity are connected, through industrial computer, it is convenient to manage.

[0040] Embodiment 4:

[0041] The utility model discloses a flow accumulation device, based on embodiment 3, still include display, industrial computer and display electricity are connected, through display, it is convenient to check flow data.

[0042] Embodiment 5:

[0043] The utility model discloses a flow accumulation device, based on embodiment 2, still include switch output unit and alarm, power unit and switch output unit electricity are connected, central processing unit and switch output unit electricity are connected, switch output unit and alarm electricity are connected, through alarm, it is convenient to alarm.

[0044] Compared with the above embodiment, the selector switch can also select a three-state selector switch, and the three states correspond to 100 milliseconds, 1 second and 10 seconds respectively.

[0045] The selector switch can be selected as required.

[0046] The sampling accumulation time can be set by adjusting the timer as required, for example, 0.5 seconds, etc.

Claims

1. A flow totalizer, characterized by: The utility model relates to a flowmeter, programmable controller PLC, selection switch and reset button, the flowmeter includes flowmeter body and differential pressure transmitter, the programmable controller PLC includes power unit, central processing unit, timer, analog input unit and switch input unit, the flowmeter body is connected with differential pressure transmitter electricity, differential pressure transmitter is connected with analog input unit electricity, analog input unit is connected with central processing unit electricity, selection switch is connected with switch input unit electricity, reset button is connected with switch input unit electricity, switch input unit is connected with timer electricity, timer is connected with central processing unit electricity, power unit is connected with central processing unit, timer and switch input unit electricity respectively.

2. A flow totalizer according to claim 1, wherein: The selection switch is a four-state selection switch or a three-state selection switch.

3. The flow totalizer of claim 1 wherein: The utility model further includes an industrial computer, and the central processing unit is electrically connected to the industrial computer.

4. A flow totalising device according to claim 3, wherein: The utility model further includes a display, and the industrial computer is electrically connected to the display.

5. The flow totalizer of claim 1 wherein: The utility model further includes an alarm, the programmable controller PLC further includes a switch output unit, the central processing unit is electrically connected to the switch output unit, the switch output unit is electrically connected to the alarm, and the power unit is electrically connected to the switch output unit.

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