JPS62127387A - Device for compacting powder - Google Patents

Abstract

PURPOSE:To attain noise elimination, maintenance work simplification and cost reduction, by equipping a compacting member with a secondary side conductor as a needle and a stator facing the conductor with a gap, thereby permitting application of AC. CONSTITUTION:Applying AC to a coil 20 of a stator 17 leads to occurrence of magnetic flux phi. This magnetic flux phi causes an induced current Ie to occur on an induced current plate 16, i.e., a needle. However, this current is an eddy current since the induced current plate 16 which is a conductor has a large area. Further, since the magnetic flux phi is AC, it becomes an advancing magnetic field wave. This advancing magnetic field wave brings about a thrust in cooperation with the eddy current. The stator 17 is fixed to a protruded portion 13a, so that the induced current plate 16 moves in the X direction as a needle. As a result, a rod 8 is elevated. After elevating the induce current plate 16 to an extent as needed in this manner, if passage of current to the coil 20 is discontinued, elimination of the magnetic flux phi and thus extinction of the thrust result. Then the rod 8 freely falls, thereby causing dust coal to be compacted by means of the lower surface of a foot 7.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a powder tamping device used for tamping pulverized coal for a coke oven.

[Prior Art] One of the methods for producing coke is the stamp charge method. This is a method in which the raw material powdered coal (usually 80-90% is 3 mm or less) is compacted to make a cake of powdered coal, and this cake is charged into a carbonization chamber and carbonized to obtain coke. It is.

In this case, the pulverized coal tamping apparatus shown in FIGS. 4 and 5 has conventionally been used.

The tamping box indicated by the reference numeral 1 in the figure is an upwardly opened tamping box, on which a pulverized coal hopper 2 and a feeder 3 are installed. A rail 4 extending horizontally in the length direction of the tamping box I is installed at the lower end of the hopper 2, and on this rail 4, three carts 5 are interconnected and the rail 4 is installed.
It is mounted movably on the top as shown by arrows (a) and (b). The carriage 5 is moved by a hydraulic cylinder 6 provided at one end of the rail 4.

Further, each of the carts 5 has a steel tamping rod 8 having a foot 7 at the lower end, which is a tamping box! Six of them are set inside so that they can move vertically forward and backward. This rod 8 has a rectangular cross section and is prevented from rotating, and steel liners 9 are attached to the outer periphery at predetermined locations in the length direction. Also, to rail 1,') 1 1llllI:yo,
Kojiri [1))・Elevating device that lowers 8 to 14 units
It goes down every 1.5 hours and goes up 7 times. This lift: ;”
:+' indicates a pair of drive shafts 10 extending in the moving direction of the trolley 5 and placed across the lot 8, as shown in the fifth picture A-.
Oh, hey! -5 A drive source (not shown) that is connected to the drive shaft 10 and rotates the drive shaft 1o synchronously in one direction in opposite directions as shown by \ marks (c) and (d) in the figure, and each drive ÷1hlO.
The driver 1 fixed at the position corresponding to the [l throat 8]
0 and a steel cam 11 made of the same material.

The cam 11 has a small diameter part 11a and a large diameter part 11b,
It is fixed to the drive shaft 10 via a rubber sleeve 12.
);), the rotating cam 11's 1st part 11b and the rod 8z= are tensioned (also, -F nailing of the funnel 8 is done by the frictional force with the liner 9, and the small iY part At the point 11a, the contact between the ridges is broken and the rod 8 falls freely, allowing tamping to be carried out.The rubber sleeve 12 connects the cam 11 to the liner 9.
It plays the role of strongly pressing against the Also, 30,・1・8
The material core 4 and the cam 11 have two cores on the drive shaft 10 for each lot.
1st and 11th! Shift jT1 degree in one direction j,,
Fix it and sacrifice it F;”, mouth, thrust 8]
・It is designed to go to 5th and 9th;-.

A place where powdered coal is tamped by such a device,
Hopper 2 and feeder 3 continuously supply the coal to the tamping box L, and when the powdered coal is piled up to a certain height, the drive shaft 10 is rotated to zero. As shown in FIG. Due to the frictional force (
The rod 8 rises by the circumferential length of the large diameter portion llb.

When the large diameter portion 11b contacts the liner 9, the lot 8 naturally falls due to its own weight, and the surface of the powdered coal is tamped by the lower surface of the foot 6. In this case, the tamping operation of the rods 8 is carried out sequentially starting from the ends.

In addition, by reciprocating the trolley 5 along the rail 71 using a hydraulic cylinder 6 provided at one end of the rail 4, the pulverized coal is tamped evenly in the length direction of the tamping box I.

``Problems to be Solved by the Invention'' The above-mentioned tamping device has the following 11 deficiencies.

(1) The friction force between the cam 11 and the liner 9 is set so that the cam 11 is strongly pressed against the liner 9 as the rod 8 is pushed into the epigastric region, so that when the cam 11 contacts the liner 9, the cam 11 is strongly pressed against the liner 9. It comes with a shock. Therefore, the noise is large, and there is a possibility that the cam 11, the drive shaft IO1 supporting the cam 11, and the rod 8 may be damaged by the impact. Furthermore, the gono-made sleeve 12 of the cam 11 is also subject to this impact, so it has to be replaced frequently.

(2) Since the cam 11 and liner 9 wear out, the frictional force is reduced and slip occurs, making it impossible to reliably raise the rod 8 one step. Furthermore, the cam 11 and the liner 9 must be replaced frequently, which complicates maintenance work and increases maintenance costs.

(3) Since the upward stroke of the lot 8 is constant, the tamping force of the powdered coal due to the free fall of the lot 8 is also constant, and the bulk density of the resulting cake of powdered coal is also constant in the height direction of the cake. However, the height of the cake is 7
000 (mm), so when a cake in such a state is carbonized to produce coke, the bottom of the cake is under a lot of pressure due to its own weight. The upper part of the coke is weaker than the lower part, and a homogeneous coke cannot be obtained.

[Means for solving the problem; The present invention provides a means for solving the problem by manipulating the tamping member onto the powder and causing it to fall.
In an apparatus for tamping powder, a secondary conductor is provided on the surface tamping member to serve as a mover, and the tamping member is provided with a falling passage for the tamping member, which is opposed to the secondary conductor with a gap. The invention is characterized in that a stator having a coil wound thereon is provided, and a power source is further provided to supply an alternating current to the coil of the stator.

[When an alternating current ':ri current is passed through the coil from a power source, magnetic flux is generated, and this magnetic flux generates an induced current (eddy current) in the tamping section 1o, which is the mover. Then, thrust is generated in the tamping part 1 and the tamping part rises.

At this time, the rising stroke can be adjusted by adjusting the energization time by -1゛.
1 can be set freely. Then, when the power is turned off/V, the tamping part falls and tamps the powder.

1 Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. In this embodiment, the tamping box 1, popper 2, feeder 3, rail 4, trolley 5, and hydraulic renoder 6 in the conventional technology shown in FIG. 41 and FIG.
, foot 7, and rod 8 are the same components. Therefore,
Of these, illustrations and explanations are omitted except for the foot 7 and the rod 8, and the rod 8, which is the main point of the present invention, is omitted.
The elevating mechanism will be explained.

FIG. 1 is a front view showing the elevating mechanism of the rod 8. Reference numerals 13 and 14 in the figure indicate a pair of guide frames fixed to the lower side of the truck 5 with the rod 8 sandwiched between them. A guide roller 15 is attached to guide the downward movement. Also, the guide frame 13 on the other side
([1] 11) The part 13a is cut out in the shape 1 (for the kite frame 13 of lot 8), and the secondary conductor is copper or aluminum thin. On the other hand, on the surface of the convex portion 13a of the kite frame 13, a gap 1:1 is pasted to the surface of the convex portion 13a of the kite frame 13. Do d-)
A fixed T-17 is provided so as to face each other.

This stator 17 has ridges 18a and i5 as shown in FIG.
It is made up of an iron core 19 that is wound around the teeth 18b, and a coil 20 that is wound around the teeth 18a.
It is installed on the protrusion +3a of the kite frame 13 toward the 1st throat 8 side. The coil 2 of this stator 17
0 is connected to an alternating current (three-phase or two-phase alternating current) power supply 21.

To explain the tamping action of the tamping device of this embodiment equipped with the above-mentioned lifting mechanism, when an alternating current is passed through the coil 20 of the stator 17, this alternating current generates a magnetic flux Φ as shown in FIG. . In this figure, X on the horizontal axis is X shown in Figure 1,
That is, it shows the position of the rod 8 in the X direction.

Then, due to this magnetic flux Φ, an induced current 1e is generated in the induced current temporary 16, which is a mover, according to Lenz's law. However, since this current has a wide range of induced current δ5 in the conductor, it does not flow through a specific path, but instead chooses the path with the least resistance in the conductor to create a small circuit.

In other words, this current becomes an "eddy current." Furthermore, since the magnetic flux Φ is alternating current, it moves with time. This becomes a "traveling magnetic field wave," and a thrust is generated by Fleming's left-hand rule by this traveling magnetic field wave and the eddy current [e. Since the stator 17 is now fixed to the convex portion 13a, the guide 1X flow temporary 16 acts as a movable element and moves in the X direction. In other words, lot 8 goes up a notch.

In this way, induction 7! After raising the placing plate 16 by the required m, when the current supply to the coil 20 is stopped, the magnetic flux Φ becomes ′
It dies and loses thrust. Then, the rod 8 falls naturally and compacts the powdered coal by the lower surface of the foot 7.

In this case, the upward stroke of the rod 8 can be easily adjusted by controlling the energization time to the coil 20 using a control panel included in the power supply device 21.

Therefore, if the upward stroke of the rod 8 is lengthened as the cakes of powdered coal are piled up from the bottom to the top, the falling stroke will be correspondingly longer, so that the powdered coal can be compacted with a large compacting force.

In this way, it is possible to make a cake with a larger bulk density from the bottom to the top, so when the cake is carbonized, the coke at the top of the cake has the same strength as the coke at the bottom. Can make coke.

In addition, since the timing of the rise of each rod 8 can be electrically adjusted, the tamping operation of lot 8 can be adjusted at the end in order to improve the release of the air contained in the powdered coal and tamp it efficiently. Try to do it in order starting from the beginning.

Further, when the rod 8 reaches its upper limit and starts to fall, if a current is applied to the coil 20 in the opposite direction to that during the upward movement, the rod 8 receives thrust in the direction of fall and is accelerated and descends. Therefore, it is possible to set a large tamping force.

f; , L, this issue ++ In the color example, the story 1 Do style provisional I6 and stator 17 are chi')・-I frame l 3 f! 1) Death 1. The force +')''-,'re,' and 5it are installed in a lighting manner from the 11 side, and the electromagnetic induction action causes +
) The forces in the direction orthogonal to the X direction that are generated simultaneously with the thrust in the X direction cancel each other out to create a force 1'1.
By eliminating the force acting on 5, and furthermore, lot 8
The induced current plate 165 and [1 1 constant j-17
It is also possible to make it circular tL-shaped.

Above, the induced current plate 16 is installed on the rod 8, and the rod 8
It is better to use the llJ mover as the mover, or to omit the induced current plate 16 and to form r7 and l'8 themselves from a material that allows the induced current to easily flow (in particular, it is better to use the 3L reronoto 8 as the mover.

Above, here we will talk about the raw materials used in the coke manufacturing process.
l') N) Compact +υ Having shown an example, it is possible to use this device when any powder needs to be compacted by considering it as a χ1 elephant.

Advantageous Effects According to the powder tamping device of the present invention, the tamping material is driven using electromagnetic induction, so that the following effects are achieved.

(1) Non-contact thrust [,1,1,,,') After raising the material, compare with i + L east (゛roζ Tsu, ma1kogu?, ri:
, it is possible to reduce the number of 17Ii products by 27% (if the maintenance work is simplified in Aro9, it will be reduced by 7%).

(2) Transmission of driving force to tamping + 4 or stable 1)
Then, make sure that you can drive the tamping material without slipping or cracking when raising the tamping material.

(3) By adjusting the electromagnetic induction effect, the upward stroke can be easily adjusted and the tamping material can be accelerated when descending. Therefore, it is possible to set a large tamping force, and by applying a gradually larger tamping force from the bottom to the top of the cake, the bulk density in the cake height direction can be adjusted, and the cake height can be adjusted. It is possible to produce coke with uniform strength in the longitudinal direction.

(4) Since the mechanism is simple, troubles are less likely to occur.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a side view showing the lifting mechanism, FIG. 2 is a partially enlarged side view of the stator, and FIG. 3 is a side view showing the elevating mechanism. Characteristic diagrams when current is passed through the coil, Figures 4 and 5 are diagrams showing the (rice feeding device), Figure 4 is its (& sectional view, Figure 5 is an enlarged view of the main parts) It is a side view. 6. Tamping lot, 16... Induced current plate (2
Next conductor), 17 Stator, 20... Coil, 21
・・・・・・Electricity 1 source HEi 1 (in person Ishikawajima Harima Heavy Industries Co., Ltd. Figure 1 Figure 2 n

Claims (1)

[Claims] In an apparatus for tamping powder by repeatedly dropping a tamping member onto the powder, the tamping member is provided with a secondary conductor to serve as a movable element, and is arranged to face the secondary conductor with a gap. A powder tamping device characterized in that a stator having a coil wound thereon is provided in the falling path of the tamping material, and a power source is further provided for supplying alternating current to the coil of the stator.