CN201526431U - Vacuum pump anti-oil return device for transformer maintenance - Google Patents

Abstract

The utility model relates to an anti-oil return device for a vacuum pump used for transformer maintenance. An oil collection tank is arranged on the pipeline of an air intake pipe. The air intake pipe communicates with the oil collection tank at the lower part of the side wall of the oil collection tank. An air outlet pipe is provided on the upper end face of the oil collection tank or on the upper part of the side wall, and the air outlet pipe is connected with the equipment to be vacuumed through a valve. An oil discharge pipe and a valve are arranged on the lower end surface of the oil collecting tank. An observation window is also arranged on the side wall of the oil collecting tank. The utility model can effectively solve the problem of the backflow of the vacuum oil in the vacuum pump caused by the sudden power failure or failure of the vacuum pump when the vacuum pump is vacuumed and in the process of maintaining the vacuum, so as to prevent the vacuum oil from entering the equipment being pumped. It will cause pollution to the pumped equipment, reduce the insulation and affect the service life. At the same time, it greatly reduces the hard work of the staff.

Description

Vacuum pump anti-oil return device for transformer maintenance

technical field

The utility model relates to a vacuum pump anti-oil return device for transformer maintenance.

Background technique

The rapid development of the national economy depends on electricity. In order to meet the society's demand for electricity, power grid construction has also become a top priority. Vacuum pumps are indispensable mechanical equipment in power construction, such as: installation and maintenance of large-scale main transformers in substations, installation and maintenance of large-scale GIS equipment, and SF6 switches , The maintenance work of the transformer is inseparable from the vacuum pump.

At the construction site, in order to ensure that the electrical equipment is clean and dry, it is often necessary to vacuumize it, and require a high degree of vacuum, and keep it for a long time, generally not less than 24 hours. It is difficult to ensure the construction during the establishment and maintenance of the vacuum degree. There is no problem with the sudden power failure or the vacuum pump working under heavy load. When the above situation occurs suddenly, because the pumped equipment is integrated with the vacuum pump and the atmosphere, the atmospheric pressure is far greater than the internal pressure of the pumped equipment, so that the air in the atmosphere flows into the pumped equipment through the vacuum pump, so that the vacuum oil in the vacuum pump It flows into the pumped equipment with the airflow, causing pollution to electrical equipment. The purpose of vacuum treatment of electrical equipment is to clean electrical equipment, which will cause pollution instead, and the cleaning is quite troublesome, and even cause immeasurable losses.

Utility model content

The purpose of this utility model is to provide a vacuum pump for transformer maintenance that prevents sudden events in the process of establishing vacuum and maintaining vacuum during transformer maintenance. Oil return device.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a vacuum pump anti-oil return device for transformer maintenance, including an air intake pipe connected with the vacuum pump and the vacuumed equipment, and a collector is provided on the pipeline of the air intake pipe. The oil tank, the air intake pipe is connected with the oil collection tank at the lower part of the side wall of the oil collection tank, the air intake pipe is connected with the vacuum pump through the flange, and the air outlet pipe is arranged on the upper end surface of the oil collection tank or the upper part of the side wall, and the air outlet pipe passes through the valve and the vacuumed equipment connect.

The oil return prevention device of the vacuum pump used for transformer maintenance is provided with an oil discharge pipe on the lower end surface of the oil collection tank, and an oil discharge valve is provided on the oil discharge pipe.

In the oil return prevention device of the vacuum pump for transformer maintenance, the side wall of the oil collection tank is also provided with an observation window for observing the oil quantity in the tank.

In the above-mentioned vacuum pump anti-oil return device for transformer maintenance, the volume of the oil collecting tank is larger than the volume of the vacuum oil in the vacuum pump.

The utility model has the following beneficial effects due to the adoption of the above technical scheme: the use of an oil collecting tank on the vacuumized pipeline can effectively solve the problem that the vacuum pump is too late due to a sudden power failure or a vacuum pump failure during the vacuum pumping and vacuum maintenance process. Turning off the air return valve will cause the vacuum oil in the vacuum pump to flow back, so as to prevent the vacuum oil from entering the pumped equipment, causing pollution of the pumped equipment, resulting in reduced insulation and affecting the service life. At the same time, it greatly reduces the hard work of the staff.

An oil discharge pipe is arranged on the lower end surface of the oil collecting tank, and an oil discharge valve is arranged on the oil discharge pipe. Once the vacuum oil in the vacuum pump flows back into the oil collection tank due to an accident, the oil drain valve can be used to drain the vacuum oil in time.

An observation window is also arranged on the side wall of the oil collecting tank. The oil volume in the tank can be observed in time.

The volume of the oil collection tank is larger than the volume of the vacuum oil in the vacuum pump. Prevent all the vacuum oil in the vacuum pump from flowing back into the oil collection tank and entering the vacuumed equipment, causing pollution accidents.

The utility model has the advantages of simple structure and convenient installation, not only can be installed on one vacuum pump for a long time, but also can be used in conjunction with other vacuum pumps. The safety of on-site work is greatly improved.

Other advantages, objectives and features of the present utility model will be set forth in the following description to some extent, and to some extent, based on the investigation and research below, it will be obvious to those skilled in the art, or can be Get teaching from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained by the structure particularly pointed out in the following description, claims, and accompanying drawings.

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Description of drawings

Fig. 1 is a schematic diagram of the front view of the utility model

Figure 2 is a schematic diagram of an embodiment of the utility model connected to multiple vacuumed devices at the same time

Marks in the picture: 1-oil collection tank 2-intake pipe 3-flange 4-oil discharge valve 5-oil discharge pipe 6-air outlet pipe 7-valve 8-observation window

Detailed ways

As shown in Figures 1 and 2, a vacuum pump anti-oil return device for transformer maintenance includes an air intake pipe 2 connected to the vacuum pump and the equipment to be vacuumed, and an oil collection tank 1 is arranged on the pipeline of the air intake pipe to carry out The air pipe communicates with the oil collecting tank at the lower part of the side wall of the oil collecting tank, the air inlet pipe is connected with the vacuum pump through the flange 3, and the air outlet pipe 6 is arranged on the upper end surface of the oil collecting tank or the upper part of the side wall, and the air outlet pipe passes through the valve 7 to connect with the vacuumed equipment connect.

The lower end surface of the oil collecting tank is provided with an oil discharge pipe 5, and the oil discharge pipe is provided with an oil discharge valve 4. Once the vacuum oil in the vacuum pump flows back in the oil collection tank 1 due to an accident, the oil drain valve 4 can let off the vacuum oil in time.

The side wall of the oil collecting tank is also provided with an observation window 8 for observing the oil quantity in the tank.

The volume of the oil collecting tank is greater than the volume of the vacuum oil in the vacuum pump. It is avoided that all the vacuum oil in the vacuum pump flows back into the oil collecting tank 1 and enters the equipment to be vacuumed, causing pollution accidents.

As shown in Figure 2, when a vacuum pump is required to evacuate several air chambers of electrical equipment at the same time, the number of air outlet pipes 6 can be increased according to the conditions for establishing the ultimate vacuum of the vacuum pump, so that one vacuum pump can simultaneously evacuate several air chambers of electrical equipment. Vacuum. It can greatly improve the safety of on-site work, improve equipment utilization and on-site work efficiency.

When working, because the intake pipe 2 is located at the lower part of the oil collection tank 1 and is connected to the vacuum pump through the pipeline flange 3, when the vacuum pump suddenly stops working, the vacuum oil enters the oil collection tank 1 with the air flow, because the air outlet pipe 6 is located in the oil collection tank 1 The upper part is connected with the vacuumed equipment with a valve 7, and the volume of the oil collection tank 1 is larger than the volume of the vacuum oil in the vacuum pump, so the vacuum oil cannot enter the vacuumed equipment. Simultaneously observe the vacuum oil quantity in the oil collection tank through the observation window 8. When the oil needs to be discharged, the vacuum oil is discharged through the oil discharge pipe 5 and the valve 4 provided at the bottom of the oil collecting tank 1 .

The air outlet pipe 6 is provided with a valve 7, the main function of which is to isolate or connect the pumped equipment and the vacuum pump during normal or abnormal conditions. Open the valve 7 when establishing and maintaining vacuum, and close the valve 7 when an abnormality occurs or when it is not in use.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model without limitation, other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the utility model, as long as they do not depart from the technical solution of the utility model The spirit and scope should be included in the claims of the present utility model.

Claims (4)

1. A vacuum pump anti-oil return device for transformer maintenance, comprising an air intake pipe (2) connected with the vacuum pump and the vacuumized equipment, characterized in that: an oil collection tank (1) is arranged on the pipeline of the air intake pipe, The air intake pipe is connected with the oil collection tank at the lower part of the side wall of the oil collection tank, the air intake pipe is connected with the vacuum pump through the flange (3), and the air outlet pipe (6) is arranged on the upper end surface of the oil collection tank or the upper part of the side wall, and the air outlet pipe passes through the valve ( 7) Connect with the vacuumed equipment. 2. The anti-oil return device for a vacuum pump for transformer maintenance according to claim 1, characterized in that: an oil discharge pipe (5) is provided on the lower end surface of the oil collection tank, and an oil discharge valve (4) is provided on the oil discharge pipe . 3. The anti-oil return device for a vacuum pump for transformer maintenance according to claim 1, characterized in that: an observation window (8) for observing the amount of oil in the tank is also provided on the side wall of the oil collection tank. 4. The oil return prevention device for a vacuum pump for transformer maintenance according to any one of claims 1 to 3, characterized in that: the volume of the oil collection tank is larger than the volume of vacuum oil in the vacuum pump.

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