Post butt joint otic placode cuts fill of starting to exchange fire

The utility model relates to a post butt joint otic placode cuts fill of starting to exchange fire, include: the box of starting to exchange fire is including the mouth of starting to exchange fire of locating the top, respectively fixed connection in the backplate and the shielding plate of box adjacent both sides portion that starts to exchange fire, said shielding plate with backplate fixed connection, and fixed connection in in the said backplate with the board is established to the inserting of one side that the shielding plate is relative, insert and establish board and vicinity the box of starting to exchange fire is gone up to stay between the adjacent lateral part and is equipped with the centre gripping clearance. Compared with the prior art, the utility model discloses the inserting of post butt joint otic placode cuts fill of starting to exchange fire is established the board and is inserted on the post flange plate conveniently fixed, and the great shielding plate of width supplies to shelter from the otic placode, and spark and clout that the welding process in-process produced all drop on in the starting to exchange fire fill of bottom, the scope of starting to exchange fire is comprehensive, and is easy and simple to handle, and the preparation is convenient.