CN102305676A - Automatic heat meter flow verification device - Google Patents

Abstract

The invention discloses a full-automatic heat meter flow calibrating device, which comprises a water circulating system, a data collecting system and a control system, wherein the water circulating system comprises a water outlet of a constant-temperature water tank, a water pump, a pressure stabilizing tank, a water inlet valve, a to-be-detected meter, a flowmeter, a flow regulating device, an observation window, a water collecting tank, a drain valve and a water inlet of the constant-temperature water tank which are sequentially communicated, a heater is arranged in the constant-temperature water tank, the data collecting system comprises a multifunctional concentrator, a centralized meter reader, a temperature sensor, a pressure transmitter and an electronic scale, and the to-be-detected meter and the flowmeter are connected; the control system comprises a computer, an intelligent controller and a frequency converter, the heater, the temperature sensor, the pressure transmitter and the frequency converter are all connected with the intelligent controller, and the intelligent controller, the centralized meter reader and the electronic scale are all connected with the computer. The invention has simple structure, realizes the automatic control of the heat energy meter flow verification, reduces the cost and the error rate, and improves the verification efficiency and the accuracy.

Description

Automatic heat meter flow verification device

the

technical field

The invention relates to the field of heat meter verification devices, in particular to a fully automatic heat meter flow verification device.

Background technique

The Ministry of Construction of the People's Republic of China has included heat metering charges in the building energy-saving plan, and the demand for heat meters has increased sharply. In the process of producing heat meters, enterprises must follow the national "Heat Energy Meter" verification regulations, and each heat meter needs to be tested and calibrated; quality and technical supervision departments in various places need to verify various heat meters. The heat meter can be installed and used. Therefore, the heat meter verification process is an important and time-consuming link in the entire production process. However, the heat meter verification devices developed by some companies require a lot of manual participation, such as manual meter reading, setting communication addresses, calculating and revising parameters, and manual opening. Close the valve etc. This device, which requires a lot of manual intervention, is inefficient and error-prone, which seriously restricts the efficiency and production capacity of heat meter verification. Enterprises are also trying to solve these problems, trying to realize the automation process in each link, such as the constant flow automatic control system of the heat meter verification device mentioned in the patent 200310106717.6, but it is still unable to realize the automation of the entire verification process.

Contents of the invention

The technical problem to be solved by the present invention is to provide a fully automatic heat meter flow verification device to solve the problems of complicated operation and low efficiency of the existing heat meter verification.

Technical scheme of the present invention is:

Fully automatic heat meter flow verification device, including a water circulation system, the water circulation system includes a water outlet of a constant temperature water tank, a water pump, a pressure stabilizing tank, a water inlet valve, a meter to be tested, a flow meter, a flow adjustment device, an observation window, and a water collection tank. , drain valve and the water inlet of the constant temperature water tank, a heater is installed in the constant temperature water tank, the flow regulating device includes a water outlet valve and a manual regulating valve connected in sequence, and the automatic heat meter flow verification device also includes a data acquisition system and a control system, the data The acquisition system includes a multifunctional hub, a centralized meter reading device, a temperature sensor installed in a constant temperature water tank, a pressure transmitter installed on a pressure-stabilizing tank, and an electronic scale installed at the bottom of the water collection tank. The meter is connected to the centralized meter reading device through a multifunctional hub; the control system includes a computer, an intelligent controller and a frequency converter connected to the water pump, and the heater, temperature sensor, pressure transmitter and frequency converter are all connected to the intelligent controller. connected, the intelligent controller, the centralized meter reading device, and the electronic scale are all connected to the computer.

The full-automatic heat meter flow verification device also includes a pneumatic system, the pneumatic system includes an air pump, an electromagnetic valve connected to the air pump, and a clamping device, and the control pipeline of the electromagnetic valve is connected with the water inlet valve and the outlet valve of the flow regulating device respectively. connection, the clamping device is connected with the meter to be checked, and the solenoid valve is connected with the intelligent controller.

The flow regulating device includes three regulating pipelines of large, medium and small flow. The small flow regulating pipeline includes a first manual regulating valve and a first water outlet valve connected with each other. The medium flow regulating pipeline includes a connected The second manual adjustment valve and the second water outlet valve. The large flow adjustment pipeline includes a third manual adjustment valve and a third water outlet valve that communicate with each other. The first water outlet valve, the second water outlet valve and the third water outlet valve are all related to the flow rate. The meter is connected, and the first manual regulating valve, the second manual regulating valve and the third manual regulating valve are all connected with the observation window.

Advantages of the present invention:

(1) Use the data acquisition system to collect the flow value of the inspected meter and flowmeter, the pressure value of the surge tank and the flow value read by the electronic scale, and use a multi-functional hub and a centralized meter reading device to collect the flow value of the inspected meter and flowmeter. The collected flow value is accurate, and all the data of the inspected meter can be read by the centralized meter reading device through a multi-functional hub;

(2) The control system sets and controls each detection device in the heat meter flow verification device, so as to realize the overall control. The control method is simple, and the heat meter flow verification can be completed automatically by calling the preset control parameters through the computer and amendments.

Description of drawings

”代表水路连接，“

Fig. 1 is a structural block diagram of the present invention, wherein, "

"Represents a waterway connection,"

”代表电路连接。 "Represents gas path connection,"

” represents a circuit connection.

Detailed ways

1. As shown in Figure 1, the automatic heat meter flow verification device includes a water circulation system, a data acquisition system, a control system, and a pneumatic system;

The water circulation system includes a water outlet of a constant temperature water tank 1, a water pump 2, a surge tank 3, a water inlet valve 4, a meter to be inspected 5, a flow meter 6, a flow adjustment device, an observation window 13, a water collection tank 14, and a drain valve 16, which are connected in sequence and the water inlet of the constant temperature water tank 1; the constant temperature water tank 1 is provided with a heater 17 and a temperature sensor 18, and the flow regulating device includes three flow regulating pipelines of large, medium and small flows, and the small flow regulating pipeline includes the first interconnected A manual adjustment valve 7 and a first water outlet valve 8, the medium flow adjustment pipeline includes a second manual adjustment valve 9 and a second water outlet valve 10 that communicate with each other, and the large flow adjustment pipeline includes a third manual adjustment valve that communicates with each other Valve 11 and the third water outlet valve 12, the first water outlet valve 7, the second water outlet valve 9 and the third water outlet valve 11 are all communicated with the flow meter 6, the first manual adjustment valve 8, the second manual adjustment valve 10 and the third water outlet valve The manual regulating valve 12 is all communicated with the observation window 13;

The data acquisition system includes a multi-functional hub 19, a centralized meter reading device 20, a pressure transmitter 21 arranged on the surge tank and an electronic scale 15 arranged at the bottom of the water collection tank. Hub 19 is connected with centralized meter reading device 20;

Control system comprises computer 23, intelligent controller 22 and the frequency converter 24 that is connected with water pump 2, heater 17, temperature sensor 18, pressure transmitter 21 and frequency converter 24 are all connected with intelligent controller 22, intelligent controller 22, Centralized meter reading device 20, electronic scale 15 are all connected with computer 23;

The pneumatic system includes an air pump 27, a solenoid valve 26 connected to the air pump 27, a meter clamping device 25 connected to the solenoid valve 26, the meter clamping device 25 is connected to the meter 5 to be checked, the water inlet valve 4, the first water outlet valve 7, the second Both the water outlet valve 9 and the third water outlet valve 11 are connected with a solenoid valve 26 , and the solenoid valve 26 is connected with an intelligent controller 22 .

Two, the installation steps of the present invention:

(1) First, build the water supply circuit. Install the constant temperature water tank 1 in the water supply circuit to provide hot water for the circuit. The outside of the constant temperature water tank 1 is wrapped with thermal insulation material, and the heater 17 and temperature sensor 18 are placed inside. The water inlet of the water pump 2 is connected to the constant temperature water tank 1. The water outlet is connected to the middle and lower part of the surge tank 3, and the water pump 2 is connected to a frequency converter 24. A pressure transmitter 21 is installed on the surge tank 3. The bottom of the surge tank 3 is connected to the tested meter 5 through the water inlet valve 4. The meter 5 is divided into two groups, and the meters are connected in series. Each group of tested meters is equipped with a meter clamping device 25, and the meter clamping gas device 25 is connected to the air pump 27 through the solenoid valve 26. When the valve of the meter clamping device 25 is opened, The inspected meter 5 is quickly clamped, and the inspected meter 5 is released when the valve of the clamping device 25 is closed; the standard flowmeter 6 is installed at the outlet of the inspected meter 5 as a reference meter, and the waterway after the standard flowmeter 6 is divided into 3 routes , respectively corresponding to the flow measurement points: large flow, medium flow and small flow. Each detection pipeline is equipped with a manual regulating valve and a water outlet valve. When measuring a certain flow, the corresponding pipeline is opened, and the other pipelines are closed. , and then the three pipelines are merged into one, and the end of the pipeline is connected to the water collection tank 14 through the observation window 13. The water collection tank 14 is placed on the electronic scale 15, and the actual flow can be calculated according to the indication value of the electronic scale 15 (this device uses quality method), the water collection tank 14 is connected to the constant temperature water tank 1 through the drain valve 16 to form a closed water supply circuit, and the water inlet valve 4, the first water outlet valve 7, the second water outlet valve 9 and the third water outlet valve 11 are all passed through the solenoid valve 26 is connected with air pump 27;

(2), set the data acquisition system and control system on the water supply circuit; first, the multifunctional hub 19 is connected to the meter 5 and the flowmeter 6 through the communication line or the infrared read-write head, and the multifunctional hub 19 controls the meter 5 and the meter under inspection. The communication gating of flowmeter 6; Multifunctional hub 19 is connected with centralized meter reading device 20 by data line; Intelligent controller 22 and the heater 17 in the constant temperature water tank 1 and temperature sensor 18, the pressure transmission in the surge tank 3 Device 21, the frequency converter 24 that is connected with water pump 2, electromagnetic valve 26 are connected, intelligent controller 22 measures the water temperature in the constant temperature water tank 1 through temperature sensor 18 and controls heater 17 to carry out constant temperature heating control to the water in constant temperature water tank 1, simultaneously The pressure transmitter 21 transmits the pressure value in the surge tank 3 to the intelligent controller 22, the intelligent controller 22 controls the size of the frequency converter 24, and the frequency converter 25 further controls the flow rate of the water pump 2, so that the pressure in the surge tank 3 Constant, to ensure constant water flow and pressure in the pipeline, the solenoid valve 26 and the air pump 27 are connected through the pipeline, and the water inlet valve 4, the first water outlet valve 7, the second water outlet valve 9 and the The opening and closing of the 3rd water outlet valve 11; Then intelligent controller 22, electronic scale 15, centralized meter reading device 20 connect communication with computer 23 respectively again, computer 23 can carry out overall control to the equipment that is connected on the intelligent controller 22, computer 23 can read the weight data measured on the electronic scale 15 to obtain the standard flow value, and can control the multifunctional hub 19 to select the meter 5 and the flow meter 6 to be checked, and the meter 5 and the flow rate to be read through the centralized meter reading device 20 Meter 6 flow value.

Three, the use principle of the present invention:

The user opens the main control software, sets the communication port 23 of the computer, selects the tested meter 5 and the flow meter 6, sets the detection method to automatic measurement of three flow points, the temperature point to 50 degrees, and the number of measurements to one time, and clicks to start measurement. The automatic detection device first closes the water inlet valve 4, clears the water collection tank 14 (the indication value of the electronic scale 15 is close to 0), then closes the drain valve 16; Initial value, then open the water inlet valve 4 and the first water outlet valve 7, close the second water outlet valve 9 and the third water outlet valve 11, control the frequency converter 24, ensure the water flow is stable and constant pressure; during the measurement period, the computer 23 collects the tested meter in real time 5. The flow meter 6 and the electronic scale 15 indicate the value. When the total flow reaches the set value, close the water inlet valve 4; after the electronic scale 15 indicates a stable value, read the final value of the electronic scale 15 and the meter 5 under inspection. The flow point detection is over; repeat the above steps and open and close different outlet valves to measure the other two flow points. The main control software calculates the error of the checked meter 5 according to the standard value and the measured value. If the error is too large, the checked meter 5 is corrected. Otherwise, the checked meter is qualified.

Claims (3)

1. Fully automatic heat meter flow verification device, including a water circulation system. The water circulation system includes a water outlet of a constant temperature water tank, a water pump, a pressure tank, a water inlet valve, a meter to be tested, a flow meter, a flow adjustment device, and an observation window. The water collection tank, the drain valve and the water inlet of the constant temperature water tank, the constant temperature water tank is equipped with a heater, the flow regulating device includes a water outlet valve and a manual regulating valve connected in sequence, and it is characterized in that: the automatic heat meter flow verification device also includes data acquisition System and control system, the data acquisition system includes a multifunctional hub, a centralized meter reading device, a temperature sensor installed in a constant temperature water tank, a pressure transmitter installed on a pressure stabilizing tank, and an electronic scale installed at the bottom of the water collection tank. The inspected meter and flow meter are connected to the centralized meter reading device through a multi-functional hub; the control system includes a computer, an intelligent controller and a frequency converter connected to the water pump, and the heater, temperature sensor, pressure transmitter and frequency conversion The devices are all connected with the intelligent controller, and the intelligent controller, the centralized meter reading device and the electronic scale are all connected with the computer. 2. The full-automatic heat meter flow verification device according to claim 1, characterized in that: the full-automatic heat meter flow verification device also includes a pneumatic system, and the pneumatic system includes an air pump, a solenoid valve connected with the air pump, and a The meter clamping device connected to the solenoid valve, and the meter clamping device is connected to the meter under test, the solenoid valve is connected to the water inlet valve and the water outlet valve of the flow regulating device respectively, and the solenoid valve is connected to the intelligent controller. 3. The automatic heat meter flow verification device according to claim 1, characterized in that: the flow regulating device includes three test pipelines for large, medium and small flow, and the small flow regulating pipeline includes interconnected The first manual adjustment valve and the first water outlet valve, the medium flow adjustment pipeline includes the second manual adjustment valve and the second water outlet valve connected to each other, and the large flow adjustment pipeline includes the third manual adjustment valve and the second water outlet valve connected to each other Three water outlet valves, the first water outlet valve, the second water outlet valve and the third water outlet valve are all communicated with the flow meter, and the first manual adjustment valve, the second manual adjustment valve and the third manual adjustment valve are all communicated with the observation window.

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