JPH0355025Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a damper opening/closing mechanism attached to a furnace mouth dust collector in a coke oven.

[Conventional technology]

Generally, the dust collector at the kiln mouth of a coke oven includes a dust collection hood installed to cover the kiln mouth;
It consists of a duct that opens into this dust collection hood, and a fan, etc. that is connected to this duct via a dust collector. Gas (hereinafter referred to as
Dust gas (called dust gas) is collected in a dust collection hood, sucked in by a fan, and passed through a dust collector for dust collection. A damper is provided to communicate and cut off communication between the dust collection hood and the duct so as to effectively utilize the suction air volume of the fan.

The generation of duct gas from the kiln mouth of a coke oven is
This was due to leakage from the furnace lid during coke extrusion and immediately after coal was loaded into the coke furnace. A large amount of dust gas is generated during coke extrusion, but the amount of dust gas caused by leakage from the furnace lid immediately after coaling is small. For this reason, when extruding coke, the damper is completely opened to collect dust with a large amount of suction, and immediately after carbonization, the damper may be slightly opened to collect dust with a small amount of suction.

Therefore, in the conventional damper mechanism of such a dust collector, the amount of expansion and contraction of a cylinder, etc., which is the drive source of the damper, is controlled by an electric signal, and the damper is controlled to be in a fully open, intermediate open, or fully closed state.

[Problem that the invention attempts to solve]

In the damper mechanism of a dust collector, which controls the amount of expansion and contraction of cylinders, etc., which are the driving source, if the electricity supply is cut off, the damper cannot be controlled at all, which may interfere with furnace work. The problem was that it was easy. Another problem was that the control mechanism for maintaining the damper at an intermediate opening was complicated.

This invention was made in view of the above circumstances,
The purpose is to provide a damper opening/closing mechanism that can maintain the damper at an intermediate opening degree with a simple mechanical configuration.

[Means for solving problems]

In order to achieve this object, the present invention includes a damper that is rotated vertically to open and close by a rotation shaft, a cylinder lever connected to the damper, and an engaging portion provided on the cylinder lever. , a second rotation shaft disposed parallel to the rotation shaft and substantially laterally; an operating lever supported by the second rotation shaft; and a locking portion provided on the operating lever. and is configured such that the locus of the engaging portion when the cylinder lever rotates and the locus of the locking portion when the operating lever rotates intersect.

[Effect]

When the cylinder lever and the operating lever are each rotated upward so that the engaging part faces the locking part, and the cylinder lever and the operating lever are respectively rotated downward, the trajectory of the engaging part and the locking part is changed. Because they intersect, the engaging part and the locking part are in a positional relationship in which they press against each other at the intersecting position, and no further downward rotation is possible. Therefore, the downward rotation of the cylinder lever is restricted, and the damper connected to the cylinder lever is also fixed at an intermediate opening degree.

〔Example〕

Hereinafter, the damper opening/closing mechanism of the present invention will be explained with reference to FIGS. 1 to 4. FIG. 1 is a schematic diagram of the main parts of a dust collector at the kiln mouth of a coke oven equipped with an embodiment of the damper opening/closing mechanism of the present invention, and FIG. 2 is a schematic diagram of the dust collector shown in FIG. 1. FIG. 3 is an enlarged view of the damper opening/closing mechanism installed in the dust collector shown in FIG. 1, and FIG. 4 is a diagram illustrating the operation of FIG. 3.

In the figure, 1 is a hood attached to the top side wall of the coke oven, 2 is a main duct that leads dust gas to a dust collector (not shown), and a damper 3 is installed between the hood 1 and the main duct 2. It is being This damper 3 can be rotated in the vertical direction by a horizontal rotation shaft 4. A cylinder lever 5 is connected to the damper 3, and the damper 3 is opened and closed by an air cylinder 6 that moves the cylinder lever 5 up and down. Communication between main duct 2 and
make it cut off. Furthermore, the cylinder lever 5 has
An engaging portion 7 that protrudes laterally parallel to the rotation shaft 4 is provided with L-channel steel or the like.

The rotation axis 4 is parallel to the rotation axis 4 in FIG.
A second rotation shaft 8 is disposed substantially laterally on the left side of the lever, and an operating lever 10 having a locking portion 9 is supported on the second rotation shaft 8. The locus of the engaging portion 7 when the cylinder lever 5 rotates and the locus of the locking portion 9 when the operating lever 10 rotates intersect in the plane of FIG. 1.

Furthermore, a connecting lever 11 is provided at the bottom of the hood 1.
As shown in FIG. 1, it is supported so as to be able to swing left and right, and a foot lever 12 is connected to one end of a connecting lever 11, and this foot lever 12 is provided with a mechanical valve 13. And the connecting lever 11
When the connecting lever 11 swings to the left in FIG. 1 due to the extension of the cylinder 14 whose other end is pushed, the foot lever 12 is rotated, and the roller lever (not shown) of the mechanical valve 13 is pressed. is configured so that it can be switched. Note that 15 is a coke oven.

Next, the operation will be explained.

First, during coke extrusion, a large amount of dust gas is generated, but the extension of the push cylinder 14 causes the connecting lever 11 to move to the left, the mechanical valve 13 is switched, the cylinder 6 is extended, and the damper 3 is fully opened. becomes. Therefore,
The dust cover collected by the hood 1 is sucked into the dust collector via the main duct 2 with a large suction amount. When the extrusion of coke is finished, the push cylinder 14 contracts, the connecting lever 11 returns to its original position, the mechanical valve 13 is switched, the cylinder 6 also contracts, and the damper 3 becomes fully closed.

Next, the collection of dust leaking from the furnace lid immediately after coal charging will be explained. The amount of dust gas generated due to leakage from the furnace lid immediately after coal charging is small, so the suction amount may be small. Therefore, immediately after the coal charging is completed and the coal loading car is moved, the furnace top worker lifts up the foot lever 12. By lifting the foot lever 12, the mechanical valve 13 is switched, the cylinder 6 is extended, and the damper 3 is fully opened. At the same time, the furnace top worker pulls up the operating lever 10. At this point, the foot lever 12 is released, the mechanical valve 13 is switched, the cylinder 6 is contracted, and the damper 3 is operated to close. In response to this closing operation of the damper 3, the furnace top worker attaches the locking portion 9 to the engaging portion 7 of the cylinder lever 5.
Rotate the operating lever 10 downward so that it faces. Then, as shown in FIG. 4, the trajectories of the engaging part 7 and the locking part 9 intersect, and at the point where they intersect, the locking part 9 moves the engaging part 7 to the rotation shaft 4, as shown in FIG. In the state of being pressed in the direction, the downward rotation of the cylinder lever 5 and the operating lever 10 is stopped. Therefore, at the position where the cylinder lever 5 stops, the damper 3
is fixed at a slightly open intermediate position. Note that the contraction speed of the cylinder 6 can be adjusted by appropriately adjusting the air flow rate given to the cylinder 6.

When the generation of dust gas due to furnace lid leakage is finished, the furnace top worker lifts up the foot lever 12 again to switch the mechanical valve 13 to fully open the damper 3, and during this time, rotates the operating lever 10 downward. The damper 3 is placed in the position shown in FIG. 1, and then the foot lever 12 is released from the raised position to contract the cylinder 6 and bring the damper 3 into a fully closed state.

[Effect of idea]

As is clear from the above explanation, the engaging part provided on the cylinder lever and the locking part provided on the operating lever are configured so that their trajectories intersect when they are rotated, and the damper is placed in the middle. Since the damper can be fixed at the opening, the damper can be reliably fixed at the intermediate opening with a simple structure, and it can be manufactured at low cost. The operation is extremely simple, and the work can be done quickly and easily, resulting in excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the main parts of a dust collector at the kiln mouth of a coke oven equipped with an embodiment of the damper opening/closing mechanism of the present invention, and FIG. 2 is a schematic diagram of the dust collector shown in FIG. 1. FIG. 3 is a partial side view, and FIG.
FIG. 4 is an enlarged view of the damper opening/closing mechanism installed in the dust collector shown in the figure, and FIG. 4 is a diagram explaining the operation of FIG. 3. In the figure, 3...damper, 4...rotation shaft,
5... Cylinder lever, 7... Engaging portion, 8...
A second rotating shaft, 9...a locking portion, and 10...an operating lever.

Claims (1)

[Scope of utility model registration request] A damper that is rotated vertically to open and close by a rotation axis, a cylinder lever connected to this damper, and an engaging part provided on this cylinder lever, which is parallel to the rotation axis and extends substantially laterally. The cylinder lever includes a second rotating shaft provided therein, an operating lever supported by the second rotating shaft, and a locking portion provided on the operating lever. A damper opening/closing mechanism characterized in that a trajectory of the engaging portion and a trajectory of the locking portion when the operating lever rotates intersect.