Adapter, mud pipe assembly and double wheel milling machine

Abstract

The invention discloses an adapter joint, a slurry pipe assembly and a double-wheel-milling trenching machine. The adapter joint comprises a joint pipe (10), a bearing assembly (20) and a connecting pipe assembly (30). A bearing (21) is sleeved on the joint pipe; the connecting pipe assembly comprises a positioning ring (31), a slurry release ring (33) and a connecting pipe (32); the bearing, the positioning ring, the slurry release ring and the connecting pipe are sequentially sleeved on the joint pipe, and the positioning ring, the connecting pipe and the slurry release ring are fixedly arranged relative to a bearing seat (22); the connecting pipe comprises a casing part (32a) sleeved on the end portion of the joint pipe and a butting part (32b) butt-jointed with the end portion of the joint pipe, one end portion of the connecting pipe is provided with a first flange (32c), and the other end portion of the first flange is provided with a second flange (13). The adapter joint are connected with two pipes which rotate relative to each other through the first flange and the second flange at the both ends of the adapter joint, so that the two pipes can rotate in opposite directions; by means of sequential sleeving, parts can be mounted and dismounted conveniently.

Description

technical field [0001] The invention relates to the connection of pipe fittings, in particular to a conversion joint, a mud pipe assembly including the conversion joint, and a double-wheel milling machine. Background technique [0002] On the double-wheel milling machine, since the mud pipe inside the mud pipe reel and the mud pipe outside the mud pipe reel have relative rotational movement, the two sections of mud pipe need to be connected through a conversion joint to ensure that the two sections The mud pipe can move relatively smoothly. [0003] In the mud pipe rotary assembly (equivalent to a conversion joint) disclosed in CN201547434U, the two ends are respectively threaded to connect two sections of mud pipes, so only one-way relative rotation of the two sections of mud pipes can be allowed, otherwise the connection will be loosened. In addition, in CN201547434U, when assembling, the rotary seal needs to be installed in the sealing jacket in advance and assembled on ...

AI Technical Summary

Problems solved by technology

[0003] In the mud pipe rotary assembly disclosed in CN201547434U (equivalent to a conversion joint), the two ends are respectively threaded to connect two sections of mud pipes, so only one-way relative rotation of the two sections of mud pipes can be allowed, otherwise the connection will be loosened

In addition, in CN201547434U, when assembling, the rotary seal needs to be installed in the sealing jacket in advance and assembled on the water-passing shaft together with the rear gland, which is not conducive to disassembly

In addition, in the entire sealing system, there are more sealing points, resulting in more failure points

[0004] Therefore, there are the problems of complex structure, inconvenient installation and difficulty in ensuring sealing in the conversion joints of the prior art

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