Protective apparatus

1. A protective apparatus, configured to protect a to-be-welded part, the to-be-welded part comprising a welding region, the protective apparatus comprising:

a base, configured for embedding the to-be-welded part; and

a protective mechanism, connected to the base, the protective mechanism comprising a welding hole, wherein the welding hole is provided corresponding to the welding region; and a surface of the protective mechanism facing the welding hole being provided with a thermally conductive coating, wherein the thermally conductive coating is configured to guide substances formed in welding the to-be-welded part to slide down along the surface of the thermally conductive coating and, wherein the protective apparatus further comprises:

a protective body, provided with the welding hole; and

a connecting member, comprising a connecting piece and a driving mechanism connected to the base, wherein the connecting piece is connected to the protective body and movably connected to the base, and the driving mechanism is drivingly connected to the connecting piece and configured to drive the connecting piece to move relative to the base so as to drive the protective body to move toward or away from the to-be-welded part.

2. The protective apparatus according to claim 1 , wherein:

the thermally conductive coating is a metal ceramic coating or a non-metal ceramic coating.

3. The protective apparatus according to claim 1 , wherein the protective body comprises:

a body portion, comprising two end portions opposite each other and the welding hole located between the two end portions, wherein the welding hole runs through the body portion; and

limiting portions, connected to and protruding from the end portions, wherein the limiting portions are configured to limit the to-be-welded part.

4. The protective apparatus according to claim 3 , wherein:

the to-be-welded part comprises a protrusion protruding from the welding region; and the body portion comprises an escape portion, wherein the escape portion is provided corresponding to the protrusion to allow at least part of the protrusion to be embedded into the escape portion.

5. The protective apparatus according to claim 1 , wherein the connecting piece comprises:

a first connecting piece connected to the protective body, wherein the first connecting piece is drivingly connected to the driving mechanism; and

two second connecting pieces, wherein the two second connecting pieces are respectively connected, at one end, to two ends of the first connecting piece, and the two second connecting pieces are movably connected, at the other end, to the base; and the driving mechanism is located between the two second connecting pieces.

6. The protective apparatus according to claim 5 , wherein:

the two second connecting pieces are respectively connected, at the other end, to two opposite outer surfaces of the base; and

the driving mechanism is disposed in the base.

7. The protective apparatus according to claim 5 , wherein:

the base comprises a guide rail, and the second connecting piece comprises a moving groove corresponding to the guide rail.

8. The protective apparatus according to claim 1 , wherein the base comprises:

a main body; and

three extensions protruding from the main body toward a same direction, wherein the three extensions comprise a first extension plate and two opposite second extension plates, and the first extension plate is disposed between the two second extension plates; wherein

the main body, the first extension plate and the two second extension plates enclose an accommodating cavity with an opening, wherein the accommodating cavity is used to accommodate the to-be-welded part, and the connecting piece covers the opening.

9. The protective apparatus according to claim 1 , wherein:

a cross-sectional area of the welding hole gradually decreases in a direction toward the welding region, wherein the direction toward the welding region is parallel to a normal to the cross-sectional area.