CN103048616B - SF 6the charged calibration equipment of density monitor - Google Patents

Abstract

The present invention relates to a kind of SF ₆the charged calibration equipment of density monitor.Described SF ₆the charged calibration equipment of density monitor, comprises gas admittance valve, variable valve, standard scale and air outlet valve, and gas admittance valve, variable valve, standard scale and air outlet valve are linked in sequence by loading line.The present invention is rational in infrastructure, easy to use, is easy to carry, and can not dismantle SF ₆on the basis of density monitor, its accuracy is detected.

Description

SF6 Density Relay Live Calibration Device

technical field

The invention relates to a SF ₆ density relay electrification verification device.

Background technique

SF ₆ gas density relay is a detection device that indicates the internal pressure of SF ₆ electrical equipment, and has the protective function of gas pressure inspection alarm and blocking contact action. The accuracy of its measurement and action is directly related to the safe operation of SF ₆ electrical equipment. Therefore, it is necessary to meet the requirements of the relevant standards, so that the SF ₆ electrical primary equipment can maintain good operating conditions for a long time.

The verification work of SF ₆ density relay refers to the verification of SF ₆ density relay at 0.6Mpa rated pressure indication value, 0.52Mpa alarm pressure indication value, 0.5Mpa blocking pressure indication value, and comparing with the analog standard pressure value to observe whether the indication value Correct, to judge the accuracy of the SF ₆ density relay indication and the quality of the contact action.

State Grid Corporation’s 2012 article 352 “State Grid Corporation’s Eighteen Major Power Grid Anti-Accident Measures” clearly stipulates that the connection method between the SF ₆ density relay and the switchgear body should meet the requirements of not disassembling the density relay.

At the same time, due to the large workload of verifying SF ₆ density relays, a special device for live verification of SF ₆ density relays without disassembly is developed, which can shorten working time, improve work efficiency, and timely detect SF ₆ density relays with abnormal faults is of great significance.

Contents of the invention

According to the deficiencies in the prior art above, the technical problem to be solved in the present invention is: provide a kind of SF ₆ density relay electrification verification device that can compare and verify the SF ₆ density relay without dismantling the SF ₆ density relay .

The SF ₆ density relay electrification verification device provided by the present invention includes an inlet valve, a regulating valve, a standard gauge and an outlet valve, and the inlet valve, the regulating valve, the standard gauge and the outlet valve are sequentially connected through an inflation pipeline.

The inlet valve, regulating valve, standard meter and outlet valve are arranged in the assembly box after being connected in sequence, and the inlet of the inlet valve, the outlet of the outlet valve, the display surface of the standard meter and the regulating port of the regulating valve are all arranged in the on the same plane as the box. It is easy to carry, and it is more convenient and fast to use when the interfaces are all on the same plane.

Both the inlet of the inlet valve and the outlet of the outlet valve are equipped with quick self-sealing joints. It is easy to connect and connect, and has good sealing performance to ensure that the gas will not leak.

The standard table is a 0.25-level accuracy standard table, which meets the standard requirements of two levels higher than the 1.5-level accuracy level of the verified SF ₆ density relay; the regulating valve can adopt the working principle of a throttle valve, and has self-regulating flow , Control gas pressure change function; Inflatable pipeline material is polytetrafluoroethylene material, light weight, corrosion resistance, oxidation resistance, high voltage resistance, non-absorbent and other advantages.

The SF ₆ density relay electrification verification device provided by the present invention has a reasonable structure, is convenient to use and is portable, and can detect the accuracy of the SF ₆ density relay without disassembling it.

Description of drawings

Fig. 1 is a structural representation of the present invention;

In the figure: 1. Inlet valve; 2. Inflatable pipeline; 3. Regulating valve; 4. Standard gauge; 5. Outlet valve.

Detailed ways

Embodiments of the present invention are further described below in conjunction with accompanying drawings:

The SF ₆ density relay electrification verification device shown in Figure 1 includes an inlet valve 1, a regulating valve 3, a standard meter 4 and an outlet valve 5, and the inlet valve 1, regulating valve 3, standard meter 4 and outlet valve 5 pass through The inflation pipelines 2 are connected sequentially. Intake valve 1, regulating valve 3, standard meter 4 and outlet valve 5 are connected in sequence and arranged in the assembly box, the inlet of inlet valve 1, the outlet of outlet valve 5, the display surface of standard meter 4 and the adjustment of regulating valve 3 The openings are all set on the same plane of the assembly box. A quick self-sealing joint is installed at the inlet of the air inlet valve 1 and the outlet of the air outlet valve 5 . Standard Table 4 is the standard table for 0.25 level accuracy.

The verification process is as follows: close the control valve of the substation primary equipment body, cut off the connection between the _{SF 6} density relay and the equipment body _; Inflate to the rated pressure, check the SF ₆ density relay with standard table 4, and check whether the rated pressure indication is accurate; detach from the SF ₆ gas cylinder, deflate from the intake valve 1, gradually reduce the SF ₆ gas pressure, wait for the standard table 4 When the pressure respectively indicates the alarm pressure and the blocking pressure, observe whether the readings of the SF ₆ density relay on these two scales are accurate and whether the value deviation is exceeded, and use a multimeter to measure the reliability of the SF ₆ density relay alarm and blocking contact action; gradually deflate to Zero gauge pressure, the calibration work is over.

Claims (2)

1. a SF ₆the charged calibration equipment of density monitor, is characterized in that, comprises gas admittance valve, variable valve, standard scale and air outlet valve, and gas admittance valve, variable valve, standard scale and air outlet valve are linked in sequence by loading line;

Be arranged in assembling case after described gas admittance valve, variable valve, standard scale are connected successively with air outlet valve, the display surface of the import of gas admittance valve, the outlet of air outlet valve, standard scale and the adjustment mouth of variable valve, be all arranged on the same plane of assembling case; The import of described gas admittance valve and the exit of air outlet valve are all provided with Quick self-sealing joint.

2. SF according to claim 1 ₆the charged calibration equipment of density monitor, is characterized in that, described standard scale is 0.25 grade of standard of accruacy table.