CN201868315U - Sulfur hexafluoride gas-filling device - Google Patents

Abstract

The utility model discloses a sulfur hexafluoride inflatable device, which comprises a casing, an interface part and a pressure gauge arranged on the casing, and a branch pipe part and a main pipe arranged in the casing. The device is applied to field switchgear Backfilling and supplementing of sulfur hexafluoride gas and vacuuming treatment of sulfur hexafluoride electrical equipment. At the same time, the device is equipped with a Maxwell vacuum gauge interface and a pressure gauge to monitor the state of the sulfur hexafluoride switchgear in real time. The device has the characteristics of convenience, convenient operation, time-saving and labor-saving, and low cost. It solves the problem of excessive SF ₆ moisture caused by air inhalation during equipment operation and power failure pressure detection (checking) and inflation and deflation work.

Description

Sulfur hexafluoride inflator

technical field

The utility model relates to a device for recharging and supplementing sulfur hexafluoride gas in switchgear.

Background technique

The charging and deflation, vacuuming and testing of various types of SF6 equipment in the electric power field maintenance site need their own special equipment to complete, so the operation process is complicated, time-consuming and laborious, and there are easy problems such as air leakage and water inhalation during the operation process. It is very easy to inhale moisture during the operation of the equipment and the pressure detection (calibration) after power failure, and the inflation and deflation work, which will cause the SF6 moisture to exceed the standard.

Contents of the invention

In order to solve the above existing problems, the utility model provides a sulfur hexafluoride inflation device which integrates on-site inflation, deflation and detection. The technical solution adopted is:

The device includes a casing, an interface part and a pressure gauge arranged on the casing, and a branch pipeline part and a main pipeline arranged in the casing. The interface part includes a Maxwell vacuum gauge interface with a valve I, a Vacuum interface, SF6 steel cylinder interface with valve III, switchgear interface I with valve IV, switchgear interface II with valve V, and switchgear interface III with valve VI, the branch pipeline includes Branch pipeline I, branch pipeline II, branch pipeline III, branch pipeline IV, branch pipeline V and branch pipeline VI, one end of the main pipeline is respectively connected to the Maxwell vacuum gauge interface through the branch pipeline I, connected to the vacuum port through the branch pipeline II, and connected to the vacuum port through the branch pipeline II. The branch pipeline III is connected to the interface of the sulfur hexafluoride cylinder, and the other end of the main pipeline is respectively connected to the switchgear interface I through the branch pipeline IV, connected to the switchgear interface II through the branch pipeline V, connected to the switchgear interface III through the branch pipeline VI, and connected to the switchgear interface III through the branch pipeline VI. The middle part is connected with a pressure gauge.

The device is connected to the corresponding equipment through different interfaces and pipelines, which can realize the recharging and replenishment of sulfur hexafluoride gas in the on-site switchgear and the vacuum treatment of sulfur hexafluoride electrical equipment. At the same time, the device is equipped with a Maxwell vacuum gauge , The pressure gauge can monitor the state of the sulfur hexafluoride switchgear in real time. The device can be designed for practical operation on the spot, using the built-in method in the box, which is convenient for on-site portability, and the external switch equipment is connected by a universal joint, which is convenient for quick replacement of the on-site switch joint, while protecting six external interfaces, and the operation instructions are intuitively displayed On the operation panel, the operator can perform on-site operations intuitively. The device is convenient, fast, practical, and easy to use. It can eliminate operating errors caused by personnel and the environment, and can significantly improve on-site work efficiency. It is very easy to inhale air and cause the problem of SF6 moisture exceeding the standard. The device saves time and effort, reduces on-site installation, overhaul and maintenance work, has wide application range, high on-site efficiency, light weight, is easy to carry, and has low cost.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in the figure, valve I9, valve II10 and valve III11 are installed on the left side of the top panel of housing 7, valve IV12, valve V13 and valve VI14 are installed on the right side, and pressure gauge 8 is installed in the middle of the top panel of housing 7 , on the left side panel of the housing 7, the Maiden vacuum gauge interface 1, the vacuum interface 2 and the sulfur hexafluoride steel cylinder interface 3 are installed, and the switchgear interface I4, the switchgear interface II5 and the switch are installed on the right panel of the housing 7 Equipment interface III6, each interface corresponds to the respective valve position. The main pipe 18 and the branch pipe part are installed in the housing 7, and one end of the main pipe 18 is respectively connected to the Maxwell vacuum gauge interface 1 through the branch pipe I15, connected to the vacuum port 2 through the branch pipe II16, and connected to sulfur hexafluoride through the branch pipe III17 Cylinder interface 3, the other end of the main line 18 is connected to the switchgear interface I4 through the branch line IV19, connected to the switchgear interface II5 through the branch line V20, connected to the switchgear interface III6 through the branch line VI21, and the middle part of the main line 18 is connected to the pressure gauge 8.

The working state of the device is divided into: 1. Vacuum state; 2. Inflated state; 3. Pressure detection state; 4. Air supply state

1. Vacuumizing state: Connect the Maxwell vacuum gauge interface 1 with the Maxwell vacuum gauge, connect the vacuum pump interface 2 with the vacuum pump, any one, two or three of the switchgear interface I4, switchgear interface II5 and switchgear interface III6 One is connected to the sulfur hexafluoride switchgear. When vacuuming the sulfur hexafluoride switchgear, first turn on the vacuum pump; turn on the valve II10 and the valve of the switchgear to be evacuated in turn; when the vacuum degree reaches the requirement, open the valve I9 and use the Maxwell vacuum gauge to detect the internal vacuum Spend.

2. Inflated state: Sulfur hexafluoride steel cylinder interface 3 is connected to the steel cylinder and pressure vessel; any one, two or three of the switchgear interface I4, switchgear interface II5 and switchgear interface III6 are connected to the sulfur hexafluoride switch device to connect. When inflating the sulfur hexafluoride switchgear, connect and open the valve III11, and open the valves (valve IV12, valve V13 or valve VI14) of the switchgear to be inflated in sequence; Observe the pressure gauge so that the inflation pressure reaches the required range; when the inflation is completed, close the valves and valves III11 of the switchgear in turn.

3. Pressure detection status: The function of pressure detection status is mainly to check the pressure of sulfur hexafluoride gas in the sulfur hexafluoride switch to ensure that the internal pressure is within the acceptable range. If it is found to be reduced, it can be replenished in time; When detecting the pressure in the sulfur hexafluoride switchgear, connect any one of the switchgear interface I4, switchgear interface II5 and switchgear interface III6 to the sulfur hexafluoride switchgear in sequence; after the connection is completed, open any one of them in sequence For the valve, observe the change of the pressure gauge 8 to detect the pressure data inside the sulfur hexafluoride switchgear.

4. Gas supply status: Sulfur hexafluoride steel cylinder port 3 is connected to the steel cylinder and pressure vessel; any one, two or three of switchgear port I4, switchgear port II5 and switchgear port III6 are connected to sulfur hexafluoride switchgear to connect. When supplementing the sulfur hexafluoride switchgear, connect and open the valve III11, and open the valves of the switchgear to be inflated in turn; supply the sulfur hexafluoride switchgear, and observe the pressure gauge 8 at the same time to make the gas supply The pressure reaches the required range; when the gas supply is completed, close the valves and valves III11 of the switchgear in turn.

The device is designed on the premise of being portable and convenient to use. It not only has the functions of vacuuming, inflating, replenishing air, and detecting pressure, but also has additional functions for on-site use. The device can be practically operated on site, using the built-in method in the box, which is convenient to carry on site. The external switch equipment is connected by a universal joint, which is convenient for quick replacement of the switch joint on site and protects the six external interfaces. The operation instructions are intuitively displayed on the operation panel. In addition, the operator can perform on-site operations intuitively.

Claims (1)

1. A sulfur hexafluoride inflatable device, comprising a housing (7), an interface part and a pressure gauge (8) located on the housing (7), and a branch pipeline part and a pressure gauge located in the housing (7) The main pipeline (18) is characterized in that: the interface part includes a Maxwell vacuum gauge interface (1) with a valve I (9), a vacuum interface (2) with a valve II (10), a vacuum interface (2) with a valve III ( 11) Sulfur hexafluoride steel cylinder interface (3), switchgear interface I (4) with valve IV (12), switchgear interface II (5) with valve V (13) and with valve VI ( 14) switchgear interface III (6), the branch pipeline part includes branch pipeline I (15), branch pipeline II (16), branch pipeline III (17), branch pipeline IV (19), branch pipeline V (20) and Branch line VI (21), one end of the main line (18) is connected to the Maxwell vacuum gauge port (1) through the branch line I (15), connected to the vacuum port (2) through the branch line II (16), and connected to the vacuum port (2) through the branch line III(17) is connected to the sulfur hexafluoride steel cylinder interface (3), and the other end of the main line (18) is respectively connected to the switchgear interface I (4) through the branch line IV (19) and connected to the switchgear through the branch line V (20). The interface II (5) is connected to the switchgear interface III (6) through the branch pipeline VI (21), and the middle part of the main pipeline (18) is connected to the pressure gauge (8).

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