JPH0342026Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a drive device for a gate for a rotating hopper provided in, for example, a blast furnace top charging device.

[Conventional technology]

In recent years, a bellless center feed type charging device as shown in FIG. 7 has been developed as a blast furnace top charging device. This charging device has two hoppers 2 and 3 arranged in upper and lower stages on the center line l of a furnace body 1, and the lower hopper 3 is a pressure equalizing hopper with seal valves 4 and 5 installed above and below. The upper hopper 2 is used as a raw material storage hopper, and the raw material carried by the belt conveyor 6 is moved downward approximately along the center line l of the furnace body 1 and loaded into the furnace body 1 by the distribution chute 9. It is characterized by the fact that it allows people to enter.

By the way, in this center-feed type charging device, preventing the segregation of the raw materials stored in the upper hopper 2 (uneven distribution of particle size distribution and uneven distribution of fine blended raw materials) maintains good operation of the blast furnace. is said to be important. In order to prevent segregation in the hopper, as is well known, when receiving raw materials supplied from the conveyor 6 in the hopper 2,
The best solution is to rotate the hopper 2 around the center l of the furnace body. However, at present, when the hopper 2 is turned, a reliable method for driving the gate 7 at the lower end of the hopper 2 has not been established. The reason is that the gate 7 at the lower end of the hopper 2 is hydraulically or electrically driven, and when the hopper 2 is configured to rotate,
This is because complicated equipment is required to supply hydraulic pressure or electricity to the gate drive actuator, making it difficult to maintain reliability.

Therefore, at present, there is no specific method for rotating the hopper 2, and the only next-best measure is to rotate the chute 8 below the belt conveyor to improve the segregation of raw materials.

[Problem that the invention attempts to solve]

However, it is undeniable that this chute rotation type is inferior to the hopper rotation type in terms of segregation improvement, and therefore, the introduction of the hopper rotation type was realized with the advent of a highly reliable gate drive device. That was what was hoped for.

In view of the above circumstances, it is an object of the present invention to provide a device that can drive a gate attached to a rotating hopper with high reliability.

[Means for solving problems]

The gate drive device of the present invention is a device that opens and closes a gate attached to a horizontally rotating hopper by rotating a gate drive shaft having an axis in the horizontal direction, and is arranged concentrically outside the hopper. a rod that is fixed perpendicularly to the outer circumference of the hopper and supports the annular body in a vertically movable manner; A motion conversion mechanism such as a link mechanism or a rack-and-pinion mechanism that converts linear motion into rotational motion of the gate drive shaft; an actuator that is installed in a non-swivel fixed part to move the annular body up and down; and an actuator that moves the annular body up and down. It is characterized by comprising a roller that is provided between the moving rod tip and the annular body and rotatably supports the annular body.

[Effect]

In the device configured as described above, when the actuator is actuated to move the annular body up and down, the vertical linear movement of the annular body is converted into rotational movement of the gate drive shaft by the motion conversion mechanism, and thereby,
The gate drive shaft rotates to open and close the gate.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are a plan view and a side sectional view of an embodiment of the present invention, in which the lower portion of the hopper 11 is shown. This hopper 11 rotates in a horizontal plane about the center l, and is provided with a discharge port 12 at its lower end, and a gate 13 for opening and closing is provided in the discharge port 12. The gate 13 is a double-opening type in which two gate plates 14, 14 are supported so as to be rotatable by a horizontal shaft (gate drive shaft) 15 provided on the outer wall of the hopper 11, and one end is connected to the horizontal shaft 15. By rotating the horizontal operating lever 16 as shown by arrow A in FIG.
5 rotates in that direction to open the gate 13, and by rotating the operating lever 16 in the opposite direction,
The horizontal shaft 15 can be rotated in the opposite direction to close the gate 13.

Further, an annular body 17 is provided on the lower outer periphery of the hopper 11 so as to be concentric with the hopper 11. This annular body 17 has tapered track surfaces 18, 18 on the upper and lower surfaces of the outer peripheral edge, and the hopper 11
It is supported by a rod 19 fixed to the outer wall of the hopper 11, rotates together with the hopper 11, and is guided by the rod 19 so that it can move vertically relative to the hopper 11. Note that the rods 19 are provided at at least three locations on the circumference.

The annular body 17 and the horizontal shaft (gate drive shaft)
A motion conversion mechanism 23 is provided between the motion conversion mechanism 15 and the motion conversion mechanism 23 . This motion conversion mechanism 23 converts the vertical linear motion of the annular body 17 into a rotational motion of the horizontal shaft 15, thereby opening and closing the gate 13, and is attached to the tip of the operating lever 16. The loose fitting pin 22 is slidably inserted into a horizontal groove, in this case, an elongated hole 20, formed in a guide portion 21 provided on the upper surface of the inner peripheral side of the annular body 17. .

On the other hand, an electric stepping cylinder 24 serves as an actuator for vertically moving the annular body 17.
The fixed part 2 does not rotate the rod 25 upward.
6, and are arranged at three locations around the circumference. A roller support frame 28 having a C-shaped cross section is fixed to the tip of the rod 25 via a support member 27, and the outer peripheral portion of the annular body 17 inserted into the support frame 28 is fixed to the tip of the rod 25 via a support member 27. Upper and lower track surfaces 18,1
An upper and lower pair of tapered rollers 29, 29 are disposed to contact the ring member 8 and clamp the outer peripheral portion of the annular body 17.
Therefore, the vertical movement of the rod 25 of the cylinder 24 is controlled by the taper roller 2 without interfering with the rotation of the annular body 17.
9, 29 to the annular body 17.

Next, the operation of the gate driving device having the above configuration will be explained.

When the hopper 11 turns, the gate 13 at the lower end
The annular body 17 as well as the operating lever 16 pivots together. On the other hand, the cylinder 24 and the roller support frame 28 at the tip of the rod 25 do not rotate, and the tapered roller 29 within the support frame 28 guides the rotation of the annular body 17.

FIG. 2 shows a state in which the gate 13 is closed, and in this state the cylinder 24 is driven and the rod 2 is
Extend 5 upwards. Then, the support frame 28 rises, and the annular body 17 held between the tapered rolls 29, 29 in the support frame 28 moves upward, and accordingly, the horizontal shaft 15 is rotated by the motion conversion mechanism 23, Gate 13 is opened. That is, the annular body 1
As the lever 7 moves upward, the tip of the operating lever 16 is pushed upward by the guide portion 21 and rotated, thereby causing the horizontal shaft 15 to rotate. Note that when the operating lever 16 is pushed upward, the loose fitting pin 2 provided at its tip
2 slides outward in the elongated hole 20 of the guide portion 21. In this case, the degree of opening of the gate 13 is adjusted by adjusting the amount of extension of the rod 25 of the cylinder 24. The position of each component in the gate open state is indicated by a two-dot chain line. In addition,
In the above device, the tapered rolls 29, 29
The outer track surfaces 18, 18 of the annular body 17 are
Since the portions are sandwiched, the annular body 17 has an alignment effect and the stability of the rotation of the annular body 17 is ensured.

In this way, the annular body 17 is
By moving up and down, the gate 13 can be opened and closed at will even while the hopper 11 is turning.

Next, for other examples of the motion conversion mechanism 23 for converting the vertical linear motion of the annular body 17 into the rotational motion of the horizontal axis (gate drive shaft) 15, refer to FIGS. 3 to 5, respectively. I will explain.

In the example shown in FIG. 3, a rack 30 is provided on the upper surface of the annular body 17 along the vertical direction, and gears 31, 32, and 33 are interposed between the rack 30 and the horizontal shaft 15 of the gate plate 14, which mesh with each other in sequence. It is something that In the motion conversion mechanism 23a with this configuration,
When the annular body 17 is raised as indicated by the arrow in the figure, the gears 31, 32, and 33 rotate as indicated by the arrows, the gate plate 14 rotates as indicated by the arrow, and the gate opens.

In the example shown in FIG. 4, a rack 34 is provided on the upper surface of the annular body 17 along the vertical direction, and the gate plate 14
A sector gear 35 connected to a horizontal shaft 15 is meshed with the rack 34. In this motion conversion mechanism 23b, when the annular body 17 is raised, the sector gear 35 meshing with the rack 34 rotates, the gate plate 14 rotates as shown by the arrow, and the gate opens.

Furthermore, the one shown in FIG. 5 is one in which the tip of the operating lever 16 and the bracket 36 of the annular body 17 are connected by a link 37, and each connecting part is connected with a pin so that the link 37 can rotate. It is. In this motion conversion mechanism 23c, when the annular body 17 is raised, the operating lever 16 connected by the link 37 rotates as shown in the arrow, and the gate plate 14 rotates as shown in the arrow to open the gate. .

The motion conversion mechanism 23c shown in FIG. 5 above constitutes a so-called link mechanism similarly to the motion conversion mechanism 23 in the above embodiment (see FIG. 2), and is also shown in FIGS. 3 and 4. The illustrated motion conversion mechanisms 23a and 23b each constitute a so-called rack-and-pinion mechanism, and both of them are capable of converting the vertical linear movement of the annular body 17 into rotational movement of the horizontal shaft 15. It is.
In addition to the above-mentioned ones, various types of motion conversion mechanisms can be employed as the motion conversion mechanism.

In the above embodiment, the two gate plates 14 are rotated by separate rotation mechanisms, but as shown in FIG. If a gear 38 is attached to each of the gate plates and the gears 38 and 38 are meshed with each other so that when one gate plate 14 is rotated, the other gate plate 14 is linked, the number of rotation mechanisms and drive cylinders can be reduced. can be achieved.

Furthermore, the present invention can be applied to a single-opening type gate using a single gate plate instead of a double-opening type gate using two gate plates.

Further, in the above embodiment, a case has been described in which an electric cylinder is used as the gate opening/closing actuator, but of course the actuator is not limited to this, and may be replaced with a hydraulic or pneumatic cylinder, a screw jack, or the like.

Moreover, although the present invention has been described above with reference to the case where it is applied to a blast furnace top charging device, it goes without saying that the present invention can be used as a drive device for gates for various other types of rotating hoppers.

[Effect of idea]

According to the present invention, the following effects can be obtained.

A gate provided at the bottom of the rotating hopper and rotating together with the rotating hopper can be opened and closed by a driving actuator installed on a fixed base.

Therefore, a power supply system connected to the actuator, ie, a system such as hydraulic piping or electric wiring, can be easily and fixedly provided. Therefore, the failure rate is reduced and high reliability is guaranteed. Therefore, if the present invention is applied to the above-mentioned center feed type charging device, it becomes possible to introduce a rotating hopper system, which can greatly contribute to improving raw material segregation.

In addition, since the gate can be opened and closed even when the rotating hopper is rotating, it is possible to reduce the capacity of the rotating hopper by considering the time schedule.
Furthermore, the swing driving power can be reduced.

Furthermore, if an actuator having an intermediate holding function is used, the gate opening degree can be maintained at any position including the intermediate opening degree, regardless of whether the hopper is rotating or stopped.

[Brief explanation of the drawing]

1 and 2 are a plan view and a side sectional view of an embodiment of the present invention, respectively, FIGS. 3 to 5 are views showing a modification of a certain mechanism in the embodiment, and FIG. 6 is a separate side view. Figure 7 showing a modification of the mechanism of
The figure is an explanatory diagram of a conventional technique. 11...hopper, 12...discharge port, 13...
Gate, 14... Gate plate, 15... Horizontal shaft (gate drive shaft), 16... Operation lever, 17... Annular body, 19... Rod, 20... Long hole (horizontal groove),
21... Guide portion, 22... Loose fitting pin, 23, 2
3a, 23b, 23c... motion conversion mechanism, 24...
…Electric stepping cylinder (actuator),
25...Electric stepping cylinder rod, 2
6... Fixed part, 28... Roller support frame, 29...
Tapered roller (roller), 30...Rack, 31,
32, 33...Gear, 34...Rack, 35...
Sector gear, 37...link.

Claims (1)

[Claims for Utility Model Registration] (1) In a device for opening and closing a gate attached to a horizontally rotating hopper by rotating a gate drive shaft having an axis in the horizontal direction, a rod arranged vertically on the outer periphery of the hopper and supporting the annular body in a vertically movable manner; a rod provided between the annular body and the gate drive shaft; a motion conversion mechanism such as a link mechanism or a rack-and-pinion mechanism that converts vertical linear motion into rotational motion of the gate drive shaft; and an actuator installed in a non-swivel fixed part for vertically moving the annular body;
A drive device for a gate for a rotating hopper, characterized in that it is comprised of a rod tip that moves up and down of the actuator and a roller that is provided between the annular body and rotatably supports the annular body. (2) The motion conversion mechanism includes an operating lever having one end connected to a gate drive shaft provided on the hopper, a loose fitting pin attached to the other end of the operating lever, and the loose fitting provided on the annular body. 2. The drive device for a gate for a rotating hopper according to claim 1, further comprising a guide portion having a horizontal groove into which a fitting pin is slidably inserted. (3) The motion converting mechanism comprises a vertically extending rack provided on an annular body and a gear fixed to the gate drive shaft and meshing with the rack. A driving device for a gate for a rotating hopper as described in Section 1. (4) The motion converting mechanism is comprised of a vertically extending rack provided on an annular body and a sector gear fixed to the gate drive shaft and meshing with the rack. A driving device for a gate for a rotating hopper as described in Section 1. (5) The motion conversion mechanism includes an operating lever having one end connected to a gate drive shaft provided on the hopper, one end of which is rotatably pin-jointed to the other end of the operating lever, and the other end of which is connected to an annular body. The drive device for a gate for a swing hopper according to claim 1, characterized in that the drive device comprises a link rotatably connected with a pin.