Multi-directional jet cleaning apparatus for steam generator

1 . A multi-directional jet cleaning apparatus for a steam generator, comprising a frame assembly, and a transmission assembly, a first nozzle assembly and a second nozzle assembly located on the frame assembly, and a motor assembly used to drive the transmission assembly;

the transmission assembly comprises a primary transmission mechanism, a secondary transmission mechanism, a second nozzle transmission mechanism, and a synchronous belt for synchronous rotation of the primary transmission mechanism, the secondary transmission mechanism, and the second nozzle transmission mechanism; the motor assembly is used to drive the primary transmission mechanism; the second nozzle transmission mechanism is provided with a second nozzle assembly, and the primary transmission mechanism and/or the secondary transmission mechanism are provided with a first nozzle assembly;

the frame assembly comprises an upper cover and a lower cover, the first nozzle assembly and the second nozzle assembly located on the lower cover, a plurality of first nozzle assemblies asymmetrically located on both sides of a center line in a lengthwise direction of the lower cover, the lower cover provided with a water flow channel, the water flow channel being in communication with the second nozzle assembly and the first nozzle assembly;

wherein the motor assembly comprises a motor and a first bevel gear located at the output end of the motor, the motor being used to drive the first bevel gear to rotate, the first bevel gear being in contact with the primary transmission mechanism;

the primary transmission mechanism comprises a first rotating shaft, and a second bevel gear, a driving synchronous wheel, a driving spur gear, and a third bevel gear set outside the first rotating shaft in order from top to bottom; the second bevel gear engaging with the first bevel gear; the third bevel gear being in contact with the first nozzle assembly; and

the secondary mechanism comprises a second rotating shaft and a driven synchronous wheel, a driven spur gear and a fourth bevel gear set outside the second rotating shaft in order from top to bottom; the fourth bevel gear being in contact with the first nozzle assembly.

2 . The multi-directional jet cleaning apparatus according to claim 1 , wherein the first nozzle assembly comprises a rotating shaft and a first seal ring, a transition ring, a first nozzle secondary bearing, a first nozzle bevel gear, a first nozzle bearing, a fixed plate and a nozzle holder sequentially set outside the rotating shaft, with the first nozzle holder being provided with a first nozzle, a first flow channel being provided in the rotating shaft to connect the water flow channel and first nozzle, the fixed plate being rigidly mounted on the lower cover; the first nozzle bevel gear engaging with the third bevel gear or fourth bevel gear; the first nozzle secondary bearing and the first nozzle bearing being located on each side of the first nozzle bevel gear respectively, the transition ring being located between the first seal ring and first nozzle secondary bearing; the fixed plate being fixed with the outer ring of the first nozzle bearing, the transition ring being fixed with the outer ring of the first nozzle secondary bearing, and the inner ring of the first nozzle bearing, inner ring of the first nozzle secondary bearing, first nozzle bevel gear, and nozzle holder being rigidly connected to the rotating shaft.

3 . The multi-directional jet cleaning apparatus according to claim 1 , wherein the transmission assembly further comprises a sub-transmission mechanism in contact with the primary and/or secondary transmission mechanism, the sub-transmission mechanism comprising a third rotating shaft, and a sub-spur gear and a sub-bevel gear set outside of the third rotating shaft in order from top to bottom, the sub-spur gear engaging with the driving or driven spur gear, the first nozzle assembly being located on the sub-transmission mechanism accordingly, the sub-bevel gear engaging with the first nozzle bevel gear.

4 . The multi-directional jet cleaning apparatus according to claim 3 , wherein the lower cover is provided with a holding slot for accommodating a portion of the first nozzle assembly and a driving slot used for exposure of the first nozzle bevel gear, and the first nozzle bevel gear passes through the driving slot to engage with the bevel gears located at the lower end of the primary transmission mechanism, secondary transmission mechanism, and sub-transmission mechanism; the lower cover is provided with a set of second nozzle assemblies and two sets of first nozzle assemblies symmetrically located on both sides of the second nozzle assembly, with each set of first nozzle assembly comprising two first nozzle assemblies; the second nozzle transmission mechanism is located between the primary transmission mechanism and the secondary transmission mechanism, and a sensor assembly is located on the upper cover for assisting in locating the nozzles to align with the center of the pipe gap.

5 . The multi-directional jet cleaning apparatus according to claim 3 , wherein the second nozzle transmission mechanism comprises a fourth rotating shaft, and an auxiliary synchronous wheel, an auxiliary bearing and an auxiliary bevel gear set outside the fourth rotating shaft in order from top to bottom, with the auxiliary bearing being fixed to the lower cover, the auxiliary synchronous wheel contacting and rotating synchronously with the synchronous belt.

6 . The multi-directional jet cleaning apparatus according to claim 5 , wherein the second nozzle assembly comprises a rotating frame, a second nozzle bevel gear socketed on the rotating frame, a mounting frame attached to both ends of the rotating frame, and a second nozzle located on the rotating frame, with the mounting frame being rigidly mounted on the frame assembly, the second nozzle bevel gear meshing with the auxiliary bevel gear, the second flow channel being provided within the rotating frame to connect the water flow channel to the second nozzle.

7 . The multi-directional jet cleaning apparatus according to claim 6 , wherein a second nozzle bearing is provided between the rotating frame and the mounting frame, and a second seal ring is provided at both ends of the rotating frame; two or more second nozzles are located on the rotating frame, and the second nozzles are symmetrically located on both sides of the second nozzle bevel gear.

8 . The multi-directional jet cleaning apparatus according to claim 6 , wherein a main bearing is located at the upper end of the first rotating shaft, the second rotating shaft, the third rotating shaft, and the fourth rotating shaft, with the main bearing being fixed to the upper cover; a cavity is formed between the upper cover and the lower cover, and the driving synchronous wheel, driven synchronous wheel, driving spur gear, driven spur gear, and synchronous belt are accommodated in the cavity.

9 . The multi-directional jet cleaning apparatus according to claim 6 , wherein the water flow channel comprises a main branch section of the waterway, a first branch section connecting the main branch section of the waterway to a first flow channel, and a second branch section connecting the main branch section of the waterway to a second flow channel; and that the main branch section of the waterway is elliptical in cross-section.

10 . The multi-directional jet cleaning apparatus according to claim 9 , wherein the first nozzle assembly is located on one side in the extension direction of the main branch section of the waterway, and two first nozzle assemblies of each group are asymmetrically located on both sides of the main branch section of the waterway; the connections of the first branch sections corresponding to two first nozzle assemblies of each group and the main branch section of the waterway are located on either side of a short axis of the main branch section of the elliptical waterway respectively and asymmetrically located on either side of the short axis.

11 . The multi-directional jet cleaning apparatus according to claim 6 , wherein the transmission assembly comprises a tensioning mechanism, with the tensioning mechanism comprising a fixed seat, and a fixed shaft and an adjusting synchronous wheel fixed to the fixed seat, the adjusting synchronous wheel contacting and tensioning the synchronous belts to rotate all synchronous wheels contacting synchronous belts.