阅读说明：本技术 一种用于核电厂主给水泵的呼吸帽 (Breathing cap for main water feeding pump of nuclear power plant ) 是由 杨秀敏 尚宪和 刘强 钱明 陈博 郭逸 张瑶 危安泽 范伟 黄少华 刘仁浮 王 于 2020-07-01 设计创作，主要内容包括：本发明公开了一种用于核电厂主给水泵的呼吸帽,它能够有效避免轴承润滑油从呼吸帽和油封处往外泄漏。包括防松螺母,橡胶垫圈,呼吸帽上盖,滤芯和呼吸帽底座。所述的呼吸帽上盖套在呼吸帽底座上。所述的呼吸帽上盖、呼吸帽底座均为一端开口的筒状结构。本发明的有益效果在于：现场使用效果较好,显著改善原呼吸帽堵塞造成的呼吸帽和油封处漏油。原设计的内置海绵式的泵轴承箱呼吸帽存在普遍容易堵塞失效的缺陷,通过使用本发明的不锈钢丝网滤芯呼吸帽,不仅可以保障高温高压气体顺利排出,避免轴承箱体内憋压,进而避免了润滑油从轴承油封处的泄漏。且防止脏物颗粒进入轴承箱,保持轴承箱内油液的清洁。(The invention discloses a breathing cap for a main water feeding pump of a nuclear power plant, which can effectively prevent bearing lubricating oil from leaking outwards from the breathing cap and an oil seal. The breathing cap comprises a locknut, a rubber gasket, a breathing cap upper cover, a filter element and a breathing cap base. The upper cover of the breathing cap is sleeved on the base of the breathing cap. The upper cover of the breathing cap and the base of the breathing cap are both of a cylindrical structure with an opening at one end. The invention has the beneficial effects that: the field use effect is better, is showing and is improving the breathing cap that former breathing cap blockked up the oil leak that causes and oil blanket department. The breathing cap with the sponge built-in pump bearing box in the original design has the defect of easy blockage and failure, and by using the breathing cap with the stainless steel wire mesh filter element, high-temperature and high-pressure gas can be smoothly discharged, the pressure build-up in the bearing box body is avoided, and further, the leakage of lubricating oil from the bearing oil seal is avoided. And dirt particles are prevented from entering the bearing box, and the cleanness of oil in the bearing box is kept.)

1. The utility model provides a breathing cap for nuclear power plant owner's feed pump which characterized in that: the breathing cap comprises a locknut, a rubber gasket, a breathing cap upper cover, a filter element and a breathing cap base.

2. The breathing cap for a main feed pump of a nuclear power plant as claimed in claim 1, wherein: the upper cover of the breathing cap is sleeved on the base of the breathing cap.

3. The breathing cap for a main feed pump of a nuclear power plant as claimed in claim 1, wherein: the upper cover of the breathing cap is of a cylindrical structure with one open end.

4. The breathing cap for a main feed pump of a nuclear power plant as claimed in claim 1, wherein: the base of the breathing cap is of a cylindrical structure with one end open.

5. The breathing cap for a main feed pump of a nuclear power plant as claimed in claim 1, wherein: a filter element is arranged in the base of the breathing cap.

6. The breathing cap for a main feed pump of a nuclear power plant as claimed in claim 1, wherein: the upper part of the breathing cap is fastened by a locknut.

7. The breathing cap for a main feed pump of a nuclear power plant as claimed in claim 1, wherein: and a rubber gasket is arranged between the upper part of the breathing cap and the locknut.

Technical Field

The invention belongs to a breathing cap of a bearing box of pump equipment, and particularly relates to a breathing cap for a main water feed pump of a nuclear power plant.

Background

The leading pump and the pressure level pump of square family mountain owner feed water pump package, former breathing cap internal design have the sponge, and the riveting is in breathing the cap casing, in case the sponge is inhaled sufficient oil content, can cause the jam, hinders the oil gas exhalation to lead to oil tank internal pressure to uprise, exhale smoothly, the oil mist granule of production directly drips the breathing cap outside, and precipitate bearing oil blanket department oil leak, pollution equipment, causes the conflagration hidden danger.

Disclosure of Invention

The invention aims to provide a breathing cap for a main water feeding pump of a nuclear power plant, which can effectively prevent bearing lubricating oil from leaking outwards from the breathing cap and an oil seal.

The technical scheme of the invention is as follows: a breathing cap for a main water feeding pump of a nuclear power plant comprises a locknut, a rubber gasket, a breathing cap upper cover, a filter element and a breathing cap base.

The upper cover of the breathing cap is sleeved on the base of the breathing cap.

The upper cover of the breathing cap is of a cylindrical structure with one open end.

The base of the breathing cap is of a cylindrical structure with one end open.

A filter element is arranged in the base of the breathing cap.

The upper part of the breathing cap is fastened by a locknut.

And a rubber gasket is arranged between the upper part of the breathing cap and the locknut.

The invention has the beneficial effects that: the field use effect is better, is showing and is improving the breathing cap that former breathing cap blockked up the oil leak that causes and oil blanket department. The breathing cap with the sponge built-in pump bearing box in the original design has the defect of easy blockage and failure, and by using the breathing cap with the stainless steel wire mesh filter element, high-temperature and high-pressure gas can be smoothly discharged, the pressure build-up in the bearing box body is avoided, and further, the leakage of lubricating oil from the bearing oil seal is avoided. And dirt particles are prevented from entering the bearing box, and the cleanness of oil in the bearing box is kept.

Drawings

FIG. 1 is a schematic view of a respiratory cap for a main feed water pump of a nuclear power plant according to the present invention.

In the figure, 1 a locknut, 2 a rubber gasket, 3 a breathing cap upper cover, 4 a filter element and 5 a breathing cap base.

Detailed Description

The invention is described in further detail below with reference to the figures and the embodiments.

As shown in figure 1, the breathing cap for the main water feeding pump of the nuclear power plant comprises a locknut 1, a rubber gasket 2, a breathing cap upper cover 3, a filter element 4 and a breathing cap base 5, wherein,

the upper cover 3 of the breathing cap is sleeved on the base 5 of the breathing cap, the upper cover 3 of the breathing cap and the base 5 of the breathing cap are both of a cylindrical structure with one open end, and the base 5 of the breathing cap is internally provided with a filter element 4.

The upper part of the breathing cap is fastened by a rubber washer 2 and a locknut 1, so that oil leakage is prevented, and the upper cover is prevented from loosening.

The whole shell of the breathing cap is made of stainless steel, the appearance is attractive and elegant, and only the examination and cleaning are needed during the maintenance of the equipment;

the breathing cap base 5 is in external thread connection, is matched with an interface of an original connecting pipe on the bearing box, and can be directly screwed down for installation.

The invention adopts a structure that the shell and the filter element can be separated. The filter element 4 in the breathing cap is a stainless steel wire mesh filter element of 200 meshes, and the filter element 4 can be independently replaced after being blocked, so that the replacement cost is saved.

If the temperature and pressure in the oil tank rise, the generated oil mist particles can flow back to the interior of the breathing cap through the filter element 4 and the oil return groove, so that the equipment and the internal lubricating oil are not polluted.