Unlock instant, AI-driven research and patent intelligence for your innovation.

High-precision rectangular air pipe air supply flow on-line measuring device

A measuring device and high-precision technology, which is used in the detection of fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, etc. and other problems, to achieve the effect of easy maintenance and repair, long service life and high measurement accuracy

Pending Publication Date: 2021-01-22
GUANGZHOU METRO DESIGN & RES INST +1
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual air conditioning and ventilation systems use rectangular air ducts for air supply. Due to the large air duct cross-section of the rectangular air duct structure, the air flow velocity distribution is uneven, and the online measurement of the air volume in the rectangular air duct cannot be realized by using traditional measuring devices. The accuracy and precision are not high, and signal blocking is prone to occur, the maintenance workload is relatively large, and there are inconveniences in use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-precision rectangular air pipe air supply flow on-line measuring device
  • High-precision rectangular air pipe air supply flow on-line measuring device
  • High-precision rectangular air pipe air supply flow on-line measuring device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] refer to Figure 1-2 , a high-precision rectangular air duct air supply online measurement device, which is arranged outside the rectangular air duct 1, and includes several full-pressure pressure-taking pipes 3, several static-pressure pressure-taking pipes 4, and a centralized Chamber 5 and signal processor 6, wherein one end of each full-pressure pressure-taking tube 3 communicates with the high-pressure end of the concentrated chamber 5, and the other free end extends into the rectangular air duct 1, and each static pressure-taking tube One end of 4 communicates with the low-pressure end of the concentration chamber 5 respectively, and the other free end extends into the rectangular air duct 1 and is arranged on the leeward side of the full-pressure pressure-taking pipe 3. The input end of the signal processor 6 is connected with the concentration chamber. Chamber 5 communicates with each other. On the windward side wall of the free end of the full-pressure pressure...

Embodiment 2

[0028] refer to Figure 3-5 , a high-precision rectangular air duct air supply online measurement device, which is arranged outside the rectangular air duct 1, and includes several full-pressure pressure-taking pipes 3, several static-pressure pressure-taking pipes 4, and a centralized Chamber 5 and signal processor 6, wherein one end of each full-pressure pressure-taking pipe 3 communicates with the concentration chamber 5, and the other free end extends into the rectangular air duct 1, and one end of each static pressure-taking pipe 4 They are respectively connected with the concentration chamber 5, and the other free end extends into the rectangular air duct 1 and is arranged on the leeward side of the full-pressure pressure-taking pipe 3. The input end of the signal processor 6 communicates with the concentration chamber 5. The windward side wall of the free end of the pressure tube 3 is evenly provided with several pressure-taking holes 7 penetrating the inner cavity, and...

Embodiment 3

[0031] refer to Figure 6-7 , a high-precision rectangular air duct air supply on-line measuring device, its technical characteristics are different from Embodiment 1 or Embodiment 2 in that: the static pressure taking pipe 4 includes an outer pipe 10, an inner pipe sleeved in the outer pipe 10 The tube 11 and the pressure-taking head 12 arranged at the end of the outer tube 10, wherein the pressure-taking head 12 is in the shape of a truncated cone, and the inner tube 11 extends to the end of the pressure-taking head 12 can improve the sensitivity of static pressure measurement. The frustum-shaped pressure-taking head 12 can play a diversion effect, prevent turbulent airflow from entering the outer pipe, effectively reduce the influence on pressure measurement due to installation deviation, velocity gradient and flow deflection angle in the air pipe, and improve measurement accuracy.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high-precision rectangular air pipe air supply flow online measuring device which is arranged outside a rectangular air pipe. The device comprises a centralized chamber and asignal processor with the input terminal communicated with the centralized chamber, and further comprises a plurality of full-pressure tapping pipes and a plurality of static-pressure tapping pipes which are arranged in a shell. One end of each full-pressure tapping pipe is communicated with the high-pressure end of the centralized chamber, the other free end of each full-pressure tapping pipe extends into the rectangular air pipe, one end of each static-pressure tapping pipe is communicated with the low-pressure end of the centralized chamber, and the other free end of each static-pressure tapping pipe extends into the rectangular air pipe and is arranged on the leeward side of the full-pressure tapping pipe. A plurality of pressure tapping holes penetrating through the inner cavity areevenly distributed in the windward side wall of the free end of the full-pressure tapping pipe, and the length of the free end of the static-pressure tapping pipe is smaller than that of the free endof the full-pressure tapping pipe. The device has the advantages of being high in online measurement precision, easy to maintain and repair, not prone to blockage and long in service life.

Description

technical field [0001] The invention belongs to the technical field of air volume measurement for air conditioning and ventilation systems, and in particular relates to a rectangular air duct air supply flow measurement device. Background technique [0002] The air supply volume of the air conditioning ventilation system is not only directly related to the change of indoor heat load, but also directly affects the energy saving and comfort of the entire air conditioning system. The usual air conditioning and ventilation systems use rectangular air ducts for air supply. Due to the large air duct cross-section of the rectangular air duct structure, the air flow velocity distribution is uneven, and the online measurement of the air volume in the rectangular air duct cannot be realized by using traditional measuring devices. The accuracy and precision are not high, and signal blocking is prone to occur, the maintenance workload is relatively large, and there are inconveniences in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/36G01F1/40
CPCG01F1/36G01F1/40
Inventor 罗辉王迪军朱奕豪罗燕萍黄贵杰王静伟秦旭谭小卫钟晓清徐光煌
Owner GUANGZHOU METRO DESIGN & RES INST