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Large-diameter standard throttle device-type heat meter and calibration method thereof

A throttling device and large-diameter technology, which are applied in the field of large-diameter heat metering devices and their verification, and can solve the problems of difficult real-flow detection and difficult detection conditions for large-diameter heat meters.

Inactive Publication Date: 2014-10-01
纪周
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Indeed, the actual flow detection of large-diameter heat meters is indeed very difficult. The flow rate of hundreds of tons of water per hour must be heated to 50°C±5°C. The type inspection requires that the test water temperature be heated to 85°C±5°C to form a stable flow rate. Detecting conditions is indeed a very difficult thing

Method used

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  • Large-diameter standard throttle device-type heat meter and calibration method thereof
  • Large-diameter standard throttle device-type heat meter and calibration method thereof
  • Large-diameter standard throttle device-type heat meter and calibration method thereof

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Experimental program
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Effect test

Embodiment 1

[0135] see figure 1 , figure 1 It is a structural schematic diagram of a large-diameter standard throttling device type heat meter of the present invention.

[0136] This embodiment is a large-diameter standard throttling device type heat meter, and the single-chip computer in its calculator 101 selects the MSP430 chip of low power consumption of U.S. TI Company; Inlet water temperature sensor 1010 and return water temperature sensor 1011 adopt platinum thermal resistance PT1000; the large-diameter flow sensor 109 is a large-caliber standard orifice plate throttling device flow sensor; the upstream pressure sensor 107 and the downstream pressure sensor 108 are microcomputer pressure sensors with an accuracy level of 0.2 and a range of 0 to 700kPa.

[0137] The standard orifice throttling device of the present invention is designed, manufactured, installed and used according to the provisions of the national standard GB / T2624-2006 of the People's Republic of China.

[0138] 1...

Embodiment 2

[0211] The specific embodiment of the verification method of the large-diameter standard throttling device type heat meter.

[0212] In this embodiment, the standard orifice throttling device type heat meter with a diameter of DN200mm in embodiment 1 is verified, and the component verification method is adopted.

[0213] 1. Verification of flow sensor

[0214] I. Inspection of standard orifice throttling device

[0215] The inspection of the standard orifice throttling device includes: the inspection of the standard orifice throttling parts, the standard pressure taking device and the upstream and downstream pipelines.

[0216] The standard orifice throttling device is inspected by the geometric inspection method.

[0217] (1) Technical requirements

[0218] It meets the technical requirements of items 6.1.1 to 6.1.6 of the national metrology verification regulations JJG640 and item 5.1 of the national standard GB / T2524.2.

[0219] (2) Test conditions

[0220] 1. Indoor e...

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Abstract

The invention discloses a large-diameter standard throttle device-type heat meter, which comprises a calculator, a water inlet temperature sensor, a backwater temperature sensor and a large-diameter flow sensor composed of a large-diameter standard throttle device, an upstream pressure sensor and a downstream pressure sensor. The standard throttle device is composed of a standard throttle piece, a standard pressure tapping, a front measurement tube and a back measurement tube. The invention also provides a calibration method of the large-diameter standard throttle device-type heat meter. The method comprises the following steps of calibration of the large-diameter standard throttle device flow sensor in a geometrical calibration method, calibration of pressure sensors, calibration of temperature sensors and calibration of the calculator. The large-diameter standard throttle device-type heat meter adopts the intelligent real-time detection technology and the data processing method, thereby improving the measurement precision and expanding a span ratio. The calibration method of the invention is a low-cost, low-energy consumption and advanced dry calibration method. The problem that the large-diameter heat meter can not be detected at present can be solved.

Description

technical field [0001] The invention relates to a metering device, in particular to a large-diameter heat metering device and a verification method thereof. Background technique [0002] my country has been implementing metered heat supply for many years. The "Technical Regulations for Heat Supply Metering" JGJ173-2009 issued by the Ministry of Housing and Urban-Rural Development clearly states: "The heat settlement point of the central heating system must be equipped with a heat meter." This is a mandatory provision , must be strictly enforced. At the same time, it was pointed out: "From the perspective of measurement and settlement, household heat metering can be divided into two methods. One is to use building heat meters for building metering and then apportion by households; the other is to use user-use heat meters to measure directly Settlement.” The method of heat allocation and measurement is to install a large-diameter heat meter at the heating entrance of the build...

Claims

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Application Information

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IPC IPC(8): G01K17/08G01K19/00
Inventor 纪周纪睿纪义盛
Owner 纪周
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