A central shaft sealing device for a circular sprinkler irrigation machine

Abstract

The present application provides a sealing apparatus for a central pivot of a circular sprinkling machine. The sealing apparatus comprises the central pivot consisting of a fixed water inlet pipe (2) and a rotary water delivery pipe (3). A rotary spherical sealing assembly (5) is disposed between the fixed water inlet pipe (2) and the rotary water delivery pipe (3). The sealing assembly comprises a spherical seat (7) and a spherical body (8) which are in fit. Communicated water flow holes (9) are disposed in the centers of the spherical seat (7) and the spherical body (8). A first annular sealing groove (11) is disposed on an inner side of the spherical seat (7). A lower spherical seal ring (12) is disposed in the first sealing groove (11). The bottom end of the spherical seat (7) is fixedly connected to the fixed water inlet pipe (2). The top end of the spherical body (8) is fixedly connected to the rotary water delivery pipe (3). Sealing is implemented by means of a spherical contact surface formed by mutual squeezing of the spherical seat and the spherical body, and the sealing performance is good. The rotary spherical sealing assembly has a high degree of freedom of movement, so that the deflection movement and the additional load between the rotary water delivery pipe and the fixed water inlet pipe can be eliminated, thereby avoiding the phenomenon of non-uniform wear of the seal ring, and extending the service life of the sealing apparatus.

Description

technical field [0001] The invention belongs to the technical field of sprinkling irrigation, and relates to a sealing device for a central fulcrum of a circular sprinkler irrigation machine. Background technique [0002] Among water-saving irrigation technologies, sprinkler irrigation technology is a water-saving irrigation technology with advanced technology, stable performance, excellent water-saving effect and remarkable social and economic benefits. The circular sprinkler irrigation machine has been vigorously promoted due to its advantages such as large single-machine irrigation area, strong adaptability to crops and terrain, high land utilization rate, high spraying uniformity, high degree of mechanization and automation, and energy saving and high efficiency. Good water-saving effect and social and economic benefits have been achieved in irrigation. [0003] During the sprinkling operation, the entire truss and cantilever part of the circular sprinkler rotate around...

AI Technical Summary

Problems solved by technology

The deficiencies in the existing sealing technology are manifested in the following aspects: 1) In order to ensure the rotational movement between the fixed water inlet pipe and the rotating water delivery pipe, there must be a minimum rotational gap between the two, and the existence of this gap becomes the biggest cause of water leakage. Hidden dangers; 2) Because the O-shaped, Y-shaped, and lip-shaped sealing rings are all made of rubber, when the rotary water delivery pipe of the sprinkler irrigation machine rotates 360 degrees relative to the fixed water inlet pipe, the sealing rings in the above patented technology wear faster. With the wear of the sealing ring, the amount of water leakage increases rapidly; 3) When the rotating water pipe of the sprinkler irrigation machine rotates 360 degrees around the fixed water inlet pipe, due to the influence of the flatness of the ground, the rotating water pipe will be deflected relative to the fixed water inlet pipe Oscillating motion causes the O-shaped, Y-shaped and lip-shaped sealing rings in the above-mentioned patented technology to have different frictional force at each radial position and the amount of wear is uneven; 4) The sealing rings in the above-mentioned patented technology are installed on the rotating water pipe and the fixed In the radial gap between the water inlet pipes, the sealing ring cannot automatically compensate for the wear gap after it is worn, resulting in further serious water leakage. When replacing and maintaining, the rotating water delivery pipe and the fixed water inlet pipe must be disassembled and separated to replace each other, and the replacement and maintenance require cranes, etc. Large equipment, labor-intensive replacement work

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