JPS5986688A - Fine adjustment for pushing back coke oven door lifter - Google Patents

Abstract

PURPOSE:To prevent damage to a knife edge and a door frame, by providing a push-back member in front of a door lifter pivotally mounted on the front of a supporting stand so that fine adjustment may be allowed for backward movement of the door lifter. CONSTITUTION:A push-back member 4 which is supported by a metal fitting 3 on the oven side and slightly pushes back a door lifter 2 is provided in front of the door lifter 2 pivotally mounted on the front of a support stand 1 which moves forward and backward. When a door 8 is suspended, removed or remounted, the push-back member 4 abuts against the metal fitting 3 and slightly pushes back the door lifter 2, with the metal fitting 3 acting as fulcrum. Thus the door 8 which is supported by the door lifter 2 moves backward slightly together with the door lifter 2, forming a gap between a front knife edge 9 and a door frame 10, preventing the knife edge 9 from scraping the door frame 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door lifter for a coke oven, and its purpose is to move the door lifter slightly backward when the door is removed and when the removed door is reinstalled, so that the knife edge and door A gap is provided between the frame and the frame to prevent mutual damage caused by scratching.

The door lifter 2 has a door lifting arm 5 that moves up and down at the top and bottom of the front surface, and a cylinder 7 for pressing and loosening the bolt 6.
As the knife edge 9 to be removed is moved upwardly or downwardly while being pressed against the door frame 10, the knife edge and the door frame have the disadvantage that they are mutually damaged by scraping.

The present invention aims to eliminate such drawbacks, and the gist thereof is to provide a door lifter with a furnace side hardware 3 as a fulcrum on the front surface of a door lifter 2 which is rotatably supported on the front part of a support frame 1 that moves back and forth. 2 is provided with a push-back member 4 for slightly retracting.

With the above configuration, when the door is lifted and removed, and when the removed door is hung and reattached, the push-back member 4 comes into contact with the furnace-side metal fitting 3, and its operation causes the door lifter 2 to move slightly backward using the metal fitting 3 as a fulcrum. Therefore, the door 8 held by the door lifter moves slightly backward together with the door lifter 2, creating a gap between the front knife edge 9 and the door frame 10, and the door frame 10 is scraped by the knife edge 9 during lifting and lowering. This ensures that mutual damage to the door frame and knife edge is eliminated.

Examples will be described below.

A support rack 1 is suspended below the upper horizontal channel 11. 12
is a hanging roller. A motor 13 with a speed reducer is attached to the upper part of the support frame 1, and a pinion 14' is attached to the rotating shaft of the motor 130, which is meshed with the round bar type rack 15 below the channel 11. 11' is a lower horizontal channel into which a guide roller 16 is fitted.

The support frame 1 supports the door lifter 2 in a front recess 23 so as to be freely pivotable. 17, 17' are the upper and lower support shafts ts
, is a fixed cylinder connected to ts'. The front upper and lower parts of the door lifter 2 are movable up and down, and in addition to mounting the door lifting arm 5.5' and a cylinder 7.7"T for loosening the bar, ram cylinders 4 and 4 are attached as push-back members.
'W has been established.

In the figure, 8 is the door, and 6.6' is the door 8.
19.19' is a lug piece, 9 is a knife edge that is attached to the inside of door 8,
20 is a heat insulating material, 21 is a coke oven, 22 is an oven chamber, 0 is a door frame, and 3, 3' are latches for bolts 6, 6'.

The motor 13 is used to remove the door 8 attached to the furnace chamber 22.
When the pinion 14 is started and the pinion 14 is rotated forward, the support rack 1 moves forward and the ram cylinders 4 and 4' forming the push-back member move forward.
comes into contact with the front surface of the latch 3, 3' that constitutes the furnace side hardware 3 and performs a guiding action to complete the forward movement, and then the door lifting arm 5,
5' and the cylinder for loosening the bar 7゜7' are moved upward to grip the lug pieces 19, 19'', and the cylinder for loosening the bar 7*7'' is directly opposed to the bolt 6.6'. Te bolt 6.6'i
At the point where the pressure is released, for example, pressure oil is removed from the fixing cylinders 18 and 18', the door lifter 2 is released, and pressure oil is supplied to the ram cylinder 4.4' to operate it forward by 10%. be. The forward movement of the cylinders 4, 4' causes the door lifter 2 to retreat by 10% using the latches 3, 3' as full fulcrums, so that the door 8 gripped by the lifting arms 5, 5'
is pulled along with the door lifter to the furnace chamber 22 with the same width.
Knife edge 9 and door frame 10 because they are further apart.
A gap is created in between. After creating the gap in this way, the lifting door 8 is removed.

When reinstalling the removal door 8, use the ram cylinder 4.4”
5. Keep the door lifter 2 in the forward (pressurized) state, move it fully forward, and keep the lifting arms 5, 5 in the state where Fik is maintained between the knife edge 9 and the door frame 10 as in the case of removal.
' and the cylinder for loosening the bolt 7.7'i descend, and the bolt 6
, 6' are seated within the latch 3.3', and the ram cylinders 4, 4' are depressurized.

The lock 6,
6' is in tension with the latches 3, 3', the door 8 moves forward with the door lifter 2 by 10%, bringing the knife edge 9 and the door frame 10 into full pressure contact, and further lowering of the lifting arms 5, 5' causes the door 8 to advance by 10%. The reinstallation is completed by moving away from the lug pieces 1.9 and 19'.

As described above, the present invention completely separates the knife edge and the door frame when the door is removed and reinstalled, and
This has the effect of reliably eliminating mutual damage caused by scratching.

[Brief explanation of the drawing]

Figure 1 is a side sectional view showing the door in a gripped state;
The figure is an enlarged side view of the main part, Fig. 3 is a cross-sectional plan view of the opening part, Fig. 4 is a side view of the main part when the door lifter is retracted after loosening the bar, and Fig. 5 is the same. Figure 6 is the same side view when the door is lifted; Figure 7 is the same side view when the door is removed; Figure 7 is the same side view when the removed door starts to be reinstalled; Figure 8 is the same side view before the reinstallation work is completed. In the figure, 1 is a support rack, 2 is a door lifter, 5 is furnace side hardware (in the example, 7- also serves as a latch), 4Fi push-back member (ram cylinder in the example), 5 is a door lifting arm, 6 is a bolt, 7 is a cylinder for releasing the bar, 8 is a door, 9 is a knife edge, and 10 is a door frame. Patent Sennin Mitate Kikai Kogyo Co., Ltd. +, -681- 8-

Claims (1)

[Claims] The present invention is characterized in that a push-back member 4 is provided on the front surface of the door lifter 2, which is rotatably supported on the front part of the support frame 1' which moves back and forth, for slightly retracting the door lifter 2 using the furnace side hardware 3 as a fulcrum. A slight retraction device in a coke oven door lifter.