Calibration method of portable needle exhaust joint and sulfur hexafluoride density relay

A density relay, sulfur hexafluoride technology, applied in the direction of pipes/pipe joints/fittings, instruments, functional valve types, etc., can solve the problems of small SF6 gas content, insufficient control accuracy, locking pressure value calibration, etc., to reduce pollution , reduce the workload and improve the effect of verification quality

Active Publication Date: 2021-12-14
DALI BUREAU OF ULTRA HIGH VOLTAGE TRANSMISSION CO CHINA SOUTHERN POWER GRID CO LTD
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Problems solved by technology

[0004] Although the above-mentioned patents can realize the control of the deflation rate, the difference between the alarm and blocking node pressure values ​​on the SF6 density relay is small, and the difference is usually between 0.1-0.2Mpa, and the SF6 density relay contains SF6 The air volume is small, and its control accuracy is not enough to realize a more accurate verification of the locking pressure value

Method used

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  • Calibration method of portable needle exhaust joint and sulfur hexafluoride density relay
  • Calibration method of portable needle exhaust joint and sulfur hexafluoride density relay
  • Calibration method of portable needle exhaust joint and sulfur hexafluoride density relay

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[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0031] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention discloses a portable needle-type exhaust joint, which includes a sulfur hexafluoride density relay and a second regulating valve, and also includes a first regulating valve communicated with the sulfur hexafluoride density relay, and the first regulating valve is used for Introduce the sulfur hexafluoride gas in the sulfur hexafluoride density relay into the first regulating valve, and control the bleed air rate; the second regulating valve communicates with the first regulating valve, and the second The regulating valve is used to discharge sulfur hexafluoride gas in the first regulating valve and control the exhaust rate. The invention can realize the flexible and accurate adjustment of the gas pressure in the SF6 density relay, and improve the calibration quality.

Description

technical field [0001] The invention relates to the technical field of sulfur hexafluoride density relay calibration, in particular to a portable needle-type exhaust joint and a calibration method for a sulfur hexafluoride density relay. Background technique [0002] Sulfur hexafluoride circuit breaker is a circuit breaker that uses sulfur hexafluoride (SF6) gas as the arc extinguishing medium and insulating medium, referred to as SF6 circuit breaker. SF6 density relay is installed on the sulfur hexafluoride circuit breaker. The SF6 pressure is monitored, and the SF6 density relay is usually equipped with two pairs of nodes for alarming and blocking. The SF6 density relay includes a four-way valve body. Three end faces of the four-way valve body are respectively provided with an air supply interface, an air intake interface, and a density meter interface. The air supply interface is connected to a quick connector with a self-sealing function. The quick connector is similar t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K15/18F16K3/24F16K3/314F16K3/30F16K27/02F16K27/04F16K31/60F16L29/00G01L27/00
CPCF16K15/18F16K3/246F16K3/314F16K3/30F16K27/0209F16K27/041F16K31/60F16L29/007G01L27/005
Inventor 邓集瀚文文李光辉马鸿波付强陈垲黄道杰梁晨马红东沈应靠刘建华李强
Owner DALI BUREAU OF ULTRA HIGH VOLTAGE TRANSMISSION CO CHINA SOUTHERN POWER GRID CO LTD
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