Flow-equalizing self-stabilization air quantity measuring device

A technology of measuring device and air volume, which is applied in the direction of detecting fluid flow by measuring pressure difference, volume/mass flow generated by mechanical effect, etc. The problem of uneven inlet air volume, etc., achieves the effect of low maintenance cost, novel structure design and simple structure

Inactive Publication Date: 2013-01-02
HEILONGJIANG ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a self-stabilizing flow measuring device for air volume, so as to solve the problem that the current compact layout of the boiler pulverizing system makes the installation space of the coal mill entrance narrow, making it difficult to install the measuring device and the air volume at the coal mill entrance. Unevenness and instability lead to large fluctuations in the measurement results of the measuring device, poor stability, and inaccurate measurement data

Method used

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specific Embodiment approach 1

[0015] Specific implementation mode one: combine figure 1 , figure 2 , image 3 and Figure 4 To illustrate this embodiment, the flow-equalizing self-stabilizing air volume measuring device described in this embodiment includes a first air passage 1, a second air passage 2, an air flow equalizer 3, a pressure transmitter 4, a temperature transmitter 5, The velocity measuring tube 6, two differential pressure tubes 9 and two cleaning air ducts 10, the first air channel 1, the air flow equalizer 3, and the second air channel 2 are arranged in a line and communicated in sequence, and the air flow equalizer The device 3 is composed of a flow equalization area 3-1 and a test area 3-2. The flow equalization area 3-1 and the test area 3-2 are connected and integrated. The flow equalization area 3-1 of the air flow equalizer 3 A plurality of intersecting spacers 13 are fixedly connected along the length direction of the air flow homogenizer, and the cross-section of the plurality ...

specific Embodiment approach 2

[0017] Specific implementation mode two: combination figure 2 and image 3 To describe this embodiment, the cross section of the air flow homogenizer 3 in this embodiment is rectangular or circular. According to the specific space on the ground, the air flow equalizer 3 with an appropriate shape is selected, so as to realize the purpose of the present invention more effectively. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0018] Specific implementation mode three: combination figure 1 , figure 2 and image 3 To illustrate this embodiment, in this embodiment, a plurality of intersecting spacers 13 are connected in the flow uniforming area 3 - 1 of the air flow homogenizer 3 along the length direction of the air flow homogenizer 3 by welding. The welding method is time-saving and labor-saving, and has strong feasibility. It has been proved in practice that the connection of multiple spacers 13 in the air equalizer by welding is the most ideal connection method. Other compositions and connections are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a flow-equalizing self-stabilization air quantity measuring device, relates to an air quantity measuring device, and aims to solve problems of high fluctuation of measurement results, poor stability and inaccurate measured data of a measuring device due to the fact that an existing pulverizing system of a boiler is compact in arrangement, mounting space for an inlet of a coal mill is narrow, the measuring device is mounted difficultly and the air quantity of the inlet of the coal mill is uneven and unstable. A first ventilating duct, an air flow equalizer and a second ventilating duct of the flow-equalizing self-stabilization air quantity measuring device are linearly arranged and are sequentially communicated with one another, a plurality of spacers are fixedly connected into a flow equalizing area, a through hole is machined on a side wall of a testing area of the air flow equalizer, a speed testing tube penetrates through the through hole, portions of a tube body of the speed testing tube positioned outside the side wall of the testing area are respectively communicated with two differential pressure tubes and two cleaning air tubes, the speed testing tube is provided with a plurality of air inlet holes positioned on the side wall of the tube body in the testing area, a temperature transmitter is arranged inside the air flow equalizer, and a pressure transmitter is perpendicularly mounted on the outer side wall of the air flow equalizer. The flow-equalizing self-stabilization air quantity measuring device is used for measuring air quantities of inlets of coal mills.

Description

technical field [0001] The invention relates to an air volume measuring device, in particular to a flow-equalizing self-stabilizing air volume measuring device. Background technique [0002] The pulverizing system is an important subsidiary system of coal-fired boilers in thermal power generation enterprises. The system is composed of coal mills, coal feeders, air supply pipes, powder supply pipes, sealing systems, and fire protection systems. The stable operation of the air supply system directly affects the safe and stable operation of the pulverizing system; the air volume measuring device in the air supply system is the key to ensure the stable and efficient operation of the pulverizing system. Due to the limited space on site, many air volume measuring devices do not meet the design and installation conditions, resulting in the air volume measuring device being unable to accurately measure the air volume at the coal mill inlet; even if the measuring device is installed,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/34
Inventor 束继伟孟繁兵金宏达杜利梅
Owner HEILONGJIANG ELECTRIC POWER RES INST
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