9.4　Head Curve and Middle Orbit

Ⅰ　Major Item

9.4.1　Reserved gaps for thermal expansion in orbit joints shall meet the requirements of design technical documents.

Quantity checked:All.

Checking method:Check installation quality records or by field test.

Ⅱ　General Items

9.4.2　Head curve installation shall be based on sprockets of the head pulley.Allowable deviations of respective parts in the curve shall be in accordance with those specified in Table 9.4.2.Refer to Figure 9.4.2.

Quantity checked:All.

Checking method:Refer to Table 9.4.2.

Table 9.4.2　Allowable deviation of head curve installation（mm）

Figure 9.4.2　Head curve

1-Sprocket；2-Head curve；3-Longitudinal center lines of traveling grate equipment

9.4.3　Allowable deviation of middle orbit installation shall be in accordance with those specified in 9.4.3.

Quantity checked:All.

Checking method:Refer to Table 9.4.3.

Table 9.4.3　Allowable deviation of middle orbit installation（mm）