JP6831984B1 - Stalker drive and stoker-type incinerator equipped with it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stoker drive device in which a power transmission loss of the connecting portion does not occur even if the play of the connecting portion of the link increases due to wear due to continuous operation for a long period of time. Provided is a stoker drive device capable of preventing the movable frame from being lifted without providing a presser plate, a presser rail, or the like. SOLUTION: A stoker drive device 1 includes a movable frame 2, a support means 3, a drive cylinder 4, a drive shaft 5, a drive lever 6, a driven lever 7, a movable frame connector 8, and a drive link 9. By extending the piston 4B of the drive cylinder 4, the movable frame 2 is pulled up diagonally forward via the drive lever 6, the drive shaft 5, the driven lever 7, the drive link 9, and the movable frame connector 8. As a result, the movable fire floor plate 12 rises diagonally forward. [Selection diagram] Fig. 2

Description

The present invention relates to a stoker type incinerator that transports and incinerates waste while stirring by the movement of a stoker (grate), and more particularly, to a stoker drive device that causes a movable fire bed plate to reciprocate diagonally up and down. ..

The stoker type incinerator is the most popular and highly reliable incinerator in Japan. Most of them operate continuously for 24 hours and operate continuously for several months. The stoker-type incinerator is provided with fixed fire bed plates and movable fire floor plates arranged diagonally upward in the transport direction of the waste to be incinerated alternately in the transport direction. Then, the movable fire bed plate reciprocates diagonally up and down to agitate and convey the waste and to ventilate the combustion air (see, for example, Patent Documents 1 and 2).

The stoker drive device that reciprocates diagonally up and down on the movable fire bed plate includes a drive cylinder in which the piston expands and contracts (for example, the hydraulic cylinder mechanism 8 of Patent Document 1 and the hydraulic cylinder S of Patent Document 2).

Movable frames (Movable frame 6 of Patent Document 1, Movable frame F2 of Patent Document 2) that support the rear end side of a large number of movable fire bed plates (Grate 2 of Patent Document 1, Movable Grate 5b of Patent Document 2) F3) is supported so that it can reciprocate diagonally up and down.

The movable frame reciprocates diagonally up and down by expanding and contracting the piston of the drive cylinder (for example, the cylinder rod 8a of Patent Document 1). As a result, the movable fire bed plate supported by the movable frame performs an oblique vertical reciprocating motion.

Japanese Unexamined Patent Publication No. 10-19212 Japanese Unexamined Patent Publication No. 06-50514

In the stoker type incinerators of Patent Documents 1 and 2, the direction in which the piston of the drive cylinder constituting the stoker drive device extends is close to the direction in which the movable frame and the movable fire bed plate rise diagonally forward. By pushing the movable frame by the thrust of the drive cylinder and raising it diagonally forward, the movable fire bed plate is raised diagonally forward (hereinafter, referred to as "push-up drive method").

In the stoker drive device of Patent Document 1, the thrust of the hydraulic cylinder mechanism 8 is the passive arm 7a, the drive shaft 9 in the horizontal direction (horizontal width direction) orthogonal to the transport direction of the waste to be incinerated, and the drive arm constituting the link. It is transmitted to the movable frame 6 via the 7b and the connecting rod 7c.

In the stoker drive device of Patent Document 2, the thrust of the hydraulic cylinder S is the movable frames F2 and F3 via the connecting rods in the horizontal direction (horizontal width direction) orthogonal to the transport direction of the waste to be incinerated and the link mechanisms 20 and 21. Is transmitted to.

In a stoker drive device such as these, the link connecting portion (for example, the connecting portion between the driving arm 7b and the connecting rod 7c of Patent Document 1 and the connecting portion between the connecting rod 7c and the movable frame 6) is a shaft and the shaft. Has a hole through which the rod is inserted. Since the stoker-type incinerator operates continuously for a long period of time as described above, the sliding surface between the shaft and the member provided with the hole progresses to wear, and a relatively large amount of backlash occurs at the link connecting portion. To have.

In the push-up drive system in which the movable frame is pushed and raised diagonally forward due to variations in the dimensions of the connecting portion, increased backlash, and the like, the points of action of thrust on the movable frame are always displaced. In particular, when the backlash becomes large, the positional deviation between the driving side action point and the driven side action point becomes large. As a result, the direction in which the movable frame is pushed changes, so that the power transmission loss increases.

Moreover, in the push-up drive system, the force acting on the movable frame when pushing the movable frame and raising it diagonally forward is decomposed into a horizontal (forward) force and a vertical (upward) force. Therefore, a force that pushes upward always acts on the movable frame. Therefore, when the operation of the movable fire floor plate is hindered by the biting of a foreign substance or the like, when the movable frame is pushed and attempted to be raised diagonally forward, the movable frame is pushed upward by the force acting on the movable frame. In addition, the movable fire bed plate and the fixed fire floor plate may float up, leading to an accident. In order to prevent such a problem, it is necessary to take measures to provide a holding plate, a holding rail, etc. to prevent the movable frame from rising.

The present invention provides a stoker drive device in which power transmission loss of the connecting portion does not occur even if the backlash of the connecting portion of the link increases due to wear due to continuous operation for a long period of time, and a presser plate, a presser rail, or the like is provided. It is an object of the present invention to provide a stoker drive device capable of preventing the movable frame from being lifted.

The gist of the present invention is as follows.

[1]
In a stoker-type incinerator in which fixed fire bed plates and movable fire floor plates arranged diagonally upward and forward in the transport direction of waste to be incinerated are alternately provided in the transport direction, and the movable fire floor plates reciprocate diagonally up and down. ,
A movable frame that supports the rear end of the movable fire floor plate, and
A support means that supports the movable frame so that it can reciprocate diagonally up and down,
A drive cylinder arranged outside the furnace that drives the movable frame,
It is a stalker drive device equipped with
A drive shaft which is arranged below the movable frame with a direction parallel to the horizontal direction orthogonal to the transport direction as an axial direction and rotatably supported around the axial center of the axial direction.
The drive lever located outside the furnace and
A driven lever, a movable frame connector, and a drive link arranged in the furnace,
With
The drive lever
One end is fixed to the drive shaft, and the other end is connected to the tip of the piston of the drive cylinder.
The driven lever
It is located on the side opposite to the drive lever in the radial direction with respect to the axis of the drive shaft.
One end is fixed to the drive shaft,
The movable frame connecting body is
It is provided on the movable frame and extends downward from the movable frame.
The drive link
Both ends are connected to the tip of the driven lever and the movable frame connecting body.
The extension of the piston of the drive cylinder pulls the movable frame diagonally forward via the drive lever, the drive shaft, the driven lever, the drive link, and the movable frame connector, thereby causing the movable fire. The floorboard rises diagonally forward ,
The direction of the force acting from the lower end position of the movable frame to the movable frame connecting member upon pulling the movable frame obliquely forward, Ru direction der inclined downward from the operation direction of the driving link,
Stalker drive.

[ 2 ]
The drive cylinder is arranged substantially in the vertical direction so that the piston protrudes downward from the cylinder tube of the drive cylinder and expands and contracts.
The stoker drive device according to [1].

[ 3 ]
A stoker-type incinerator provided with the stoker drive according to [1] or [2].

According to the configuration of [1], the extension of the piston of the drive cylinder pulls the movable frame diagonally forward via the drive lever, the drive shaft, the driven lever, the drive link, and the movable frame connector, whereby the movable frame is movable. The fire bed rises diagonally forward. Since it is such a pull-up drive system, even if the play of the link connecting portion increases due to wear due to continuous operation for a long period of time, the movable frame connecting body is driven by the drive link when the movable frame is raised diagonally forward. Since the pulling direction does not change due to the above, power transmission loss of the connecting portion does not occur.

According to the configuration of [ 1 ], the direction of the force acting on the movable frame connector when the movable frame is pulled diagonally forward from the lower end position of the movable frame is a direction inclined downward from the operating direction of the drive link. .. As a result, the movable frame does not rise even if a factor that hinders the upward movement of the movable frame diagonally forward occurs. Therefore, even if the operation of the movable fire floor plate is hindered by the biting of foreign matter without providing a holding plate or holding rail, the movable frame, the movable fire floor plate, and the fixed fire floor plate may be lifted to cause an accident. There is no risk of being connected.

According to the configuration of [ 2 ], since the drive cylinders are arranged outside the furnace in the substantially vertical direction, space can be saved and maintainability can be improved.

It is a vertical sectional front view which shows the outline of the stoker type incinerator which concerns on embodiment of this invention. Similarly, it is a left side view of a vertical cross section. It is also a cross-sectional plan view. It is an operation explanatory view of the stoker drive device which concerns on embodiment of this invention, and is the left side view of the vertical cross section which shows the state which the movable fire bed plate is located at the lower end. It is also an operation explanatory view, and is a vertical cross-sectional left side view showing a state in which the movable fire floor plate is located at the upper end. FIG. 5 is a schematic vertical cross-sectional view of an enlarged portion of a main part showing a direction in which a movable frame is pulled diagonally forward by a stalker drive device.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

In this specification, front, back, left and right are defined in the direction of transport of the waste to be incinerated (direction of arrow D in the figure), and the front view (FIG. 1) is taken as the front view.

The direction of the axis C of the rotating drive shaft 5 is referred to as "axial direction", and the radial direction of the drive shaft 5 centered on the axis C is referred to as "diameter direction". The axial direction is parallel to the horizontal direction H orthogonal to the transport direction D.

<Stalker type incinerator>
The stoker type incinerator A according to the embodiment of the present invention shown in the front view of the vertical cross section of FIG. 1, the left side view of the vertical cross section of FIG. 2, and the plan view of the cross section of FIG. 3 is caused by the movement of the stoker (grate). , A facility that transports and incinerates waste (general waste / industrial waste) while stirring.

The stalker type incinerator A is provided with fixed fire bed plates 11 and movable fire floor plates 12 arranged diagonally upward and forward toward the transport direction D of the waste to be incinerated in the transport direction D alternately, and the movable fire floor plates 12 are oblique. Perform up and down reciprocating movement. Further, combustion air is sent from below the fixed fire bed plate 11 and the movable fire floor plate 12 to above the fixed fire floor plate 11 and the movable fire floor plate 12. As a result, while burning the waste, it is sent to each of the drying, burning, and post-combustion processes, and in the post-combustion process, the waste is almost completely incinerated.

The rear end portion of the fixed fire bed plate 11 is supported by the fixed fire floor plate receiving member 13 attached to the fixed frame L. The rear end portion of the movable fire floor plate 12 is supported by the movable fire floor plate receiving member 14 attached to the movable frame 2. Therefore, the rear end portion of the movable fire bed plate 12 is supported by the movable frame 2 via the movable fire floor plate receiving member 14.

As shown in the left side view of the vertical cross section of FIGS. 2, 4 and 5, the lower surface 12B of the frontmost movable fire bed plate 12 corresponds to the upper surface 10A of the tip fire floor plate 10 supported by the tip fire floor plate support member K. The upper surface 12A of the movable fire floor plate 12 is in contact with the lower surface 11B of the fixed fire floor plate 11 on the rear side, and the dynamic fire floor plate 12 slides between them.

The lower surface 12B of the movable fire floor plate 12 other than the frontmost movable fire floor plate 12 abuts on the upper surface 11A of the fixed fire floor plate 11 on the front side, and the upper surface 12A of the movable fire floor plate 12 is the lower surface of the fixed fire floor plate 11 on the rear side. It comes into contact with 11B, and the dynamic fire bed plate 12 slides between them.

Although not described in detail, the fixed fire bed plate 11 and the movable fire floor plate 12 constituting the grate are cooled by circulating the cooling water in the cooling pipe P. Thereby, the fixed fire bed plate 11 and the movable fire floor plate 12 can be prevented from being burnt.

<Structure of stoker drive device>
The stoker drive device 1 shown in the front view of the vertical cross section of FIG. 1, the left side view of the vertical cross section of FIG. 2, and the plan view of the cross section of FIG. 3 includes a movable frame 2, a support means 3, and a drive cylinder 4.

The supporting means 3 includes inclined rails 15 provided on the front, rear, left and right sides of the lower surface of the movable frame 2, rollers 16 that rotate in contact with the inclined rails 15, and roller cradle 17 supported by the fixed frame L. The flange 16A provided at the end of the roller 16 restricts the inclined rail 15 from moving in a direction parallel to the horizontal direction H orthogonal to the transport direction D with respect to the roller 16.

The movable frame 2 is supported by the support means 3 having such a configuration so that it can reciprocate diagonally up and down.

The drive cylinder 4 is for driving the movable frame 2, and is arranged in the outer OF of the furnace in the substantially vertical direction. The upper end of the cylinder tube 4A of the drive cylinder 4 is pivotally supported by a rotation shaft J0 parallel to the horizontal direction H, and the piston 4B projects downward from the cylinder tube 4A. By arranging the drive cylinder 4 in the OF outside the furnace in the substantially vertical direction, space can be saved and maintainability can be improved.

The stalker drive device 1 is arranged below the movable frame 2 with a direction parallel to the horizontal direction H as an axial direction, and includes a drive shaft 5 that rotates around an axial center C in the axial direction. One end of the drive shaft 5 is supported by the bearing B1 of the IF in the furnace. The drive shaft 5 is inserted into the through hole O of the side wall SW, and the other end of the drive shaft 5 is supported by the bearing B2 of the outside OF. A sealing device N is provided between the drive shaft 5 and the side wall SW at a position where the drive shaft 5 exits the furnace outside OF.

The stoker drive device 1 includes a drive lever 6 arranged in the outside OF of the furnace, a driven lever 7 arranged in the IF inside the furnace, a movable frame connector 8, and a drive link 9.

One end of the drive lever 6 is fixed to the drive shaft 5, and the other end of the drive lever 6 is connected to the tip of the piston 4B of the drive cylinder 4 by a rotation shaft J1 parallel to the horizontal direction H.

One end of the driven lever 7 is fixed to the drive shaft 5, and the driven lever 7 is located on the side opposite to the drive lever 6 in the radial direction with respect to the axis C of the drive shaft 5.

The movable frame connector 8 is provided on the movable frame 2 and extends downward from the movable frame 2.

One end 9A of the drive link 9 is connected to the tip of the driven lever 7 by a rotation shaft J2 parallel to the horizontal direction H, and the other end 9B of the drive link 9 is a rotation shaft J3 parallel to the horizontal direction H. Is connected to the movable frame connecting body 8.

<Operation of stalker drive device>
When the piston 4B of the drive cylinder 4 is extended as shown by the arrow E1 in FIG. 4, it is referred to the movable frame 2 via the drive lever 6, the drive shaft 5, the driven lever 7, the drive link 9, and the movable frame connector 8. A force acts in the direction of the arrow F1 in FIG. 4, and the movable frame 2 is pulled diagonally forward as shown in FIG. As a result, a force acts on the movable fire bed plate 12 in the direction of the arrow G1 in FIG. 4, and the movable fire floor plate 12 rises diagonally forward as shown in FIG. The operating direction of the drive link 9 that pulls up the movable frame 2 diagonally forward (see also arrows F1 and 6 in the figure) is substantially parallel to the operating direction of the movable fire bed plate 12 (arrow G1 in the figure).

When the piston 4B of the drive cylinder 4 contracts as shown by the arrow E2 in FIG. 5, it is referred to the movable frame 2 via the drive lever 6, the drive shaft 5, the driven lever 7, the drive link 9, and the movable frame connector 8. A force acts in the direction of the arrow F2 in FIG. 5, and the movable frame 2 is pushed down diagonally downward as shown in FIG. As a result, a force acts on the movable fire bed plate 12 in the direction of the arrow G2 in FIG. 5, and the movable fire floor plate 12 descends diagonally backward as shown in FIG.

When the movable frame 2 and the movable fire bed plate 12 perform a descending operation, the downward slope of the angle α in FIG. 5 is obtained, and the gravity due to the mass of the waste and the mass of the movable parts such as the movable frame 2 and the movable fire floor plate 12 Works. Therefore, the lowering operation can be performed with a small output of the drive cylinder 4.

<Effect>
The stoker drive device 1 according to the embodiment of the present invention is not the push-up drive system as in the conventional stoker drive device, but is driven by the extension of the piston 4B of the drive cylinder 4, the drive lever 6, the drive shaft 5, and the driven lever. This is a pull-up drive system in which the movable frame 2 is pulled up diagonally forward via the drive link 9 and the movable frame connector 8, whereby the movable fire bed plate 12 is raised diagonally forward.

Therefore, even if the link connecting portion, that is, the play around the rotating shafts J2 and J3 increases due to wear due to continuous operation over a long period of time, the movable frame connecting body 8 is moved when the movable frame 2 is raised diagonally forward. Since the point of action in the direction of pulling up by the drive link 9 (direction of arrow M in the schematic view of the vertical cross section of the enlarged portion of the main part in FIG. 6) does not change, power transmission loss of the connecting portion does not occur.

In the stoker drive device 1 according to the embodiment of the present invention, the direction of the force acting on the movable frame connector 8 when the movable frame 2 is pulled diagonally forward from the lower end position of the movable frame 2 which is the solid line in FIG. 6 (FIG. The middle arrow M) is a direction inclined downward by an angle β from the operating direction of the drive link 9 (arrow F1 in the figure).

Therefore, even if a factor that hinders the obliquely forward ascending operation of the movable frame 2 occurs, the movable frame 2 does not float. Therefore, it is possible to prevent the movable frame 2 from being lifted without providing a holding plate, a holding rail, or the like. As a result, even if the operation of the movable fire floor plate 12 is hindered by the biting of foreign matter or the like, there is no possibility that the movable frame 2, the movable fire floor plate 12, and the fixed fire floor plate 11 will float up and lead to an accident.

Further, in the stoker drive device 1 according to the embodiment of the present invention, since a tensile force acts on the drive link 9, the member cross section is selected in consideration of buckling like a member bearing a compressive force. There is no need. As a result, the drive link 9 can have a smaller cross-sectional area than the member that bears the compressive force, so that the weight can be reduced and the structure becomes simple.

All the descriptions of the above embodiments are examples, and the present invention is not limited thereto. Various improvements and modifications can be made without departing from the scope of the present invention.

1 Stoker drive device 2 Movable frame 3 Support means 4 Drive cylinder 4A Cylinder tube 4B Piston 5 Drive shaft 6 Drive lever 7 Driven lever 8 Movable frame connector 9 Drive link 9A, 9B End 10 Tip fire bed plate 10A Top surface 11 Fixed fire floor plate 11A Upper surface 11B Lower surface 12 Movable fire floor plate 12A Upper surface 12B Lower surface 13 Fixed fire floor plate receiving member 14 Movable fire floor plate receiving member 15 Inclined rail 16 Roller 16A Flange 17 Roller cradle A Stoker type incinerator B1, B2 Bearing C Axis center D Waste Transport direction E1, F1, G1 Operating direction E2, F2, G2 Operating direction H Horizontal direction orthogonal to the waste transport direction IF In-core J0, J1, J2, J3 Rotation axis K Tip fire bed plate support member L Fixed frame Direction of M force N Sealing device O Through hole OF Out of furnace P Cooling pipe SW Side wall α, β Angle

Claims (3)

In a stoker-type incinerator in which fixed fire bed plates and movable fire floor plates arranged diagonally upward and forward in the transport direction of waste to be incinerated are alternately provided in the transport direction, and the movable fire floor plates reciprocate diagonally up and down. ,
A movable frame that supports the rear end of the movable fire floor plate, and
A support means that supports the movable frame so that it can reciprocate diagonally up and down,
A drive cylinder arranged outside the furnace that drives the movable frame,
It is a stalker drive device equipped with
A drive shaft which is arranged below the movable frame with a direction parallel to the horizontal direction orthogonal to the transport direction as an axial direction and rotatably supported around the axial center of the axial direction.
The drive lever located outside the furnace and
A driven lever, a movable frame connector, and a drive link arranged in the furnace,
With
The drive lever
One end is fixed to the drive shaft, and the other end is connected to the tip of the piston of the drive cylinder.
The driven lever
It is located on the side opposite to the drive lever in the radial direction with respect to the axis of the drive shaft.
One end is fixed to the drive shaft,
The movable frame connecting body is
It is provided on the movable frame and extends downward from the movable frame.
The drive link
Both ends are connected to the tip of the driven lever and the movable frame connecting body.
The extension of the piston of the drive cylinder pulls the movable frame diagonally forward via the drive lever, the drive shaft, the driven lever, the drive link, and the movable frame connector, thereby causing the movable fire. The floorboard rises diagonally forward ,
The direction of the force acting from the lower end position of the movable frame to the movable frame connecting member upon pulling the movable frame obliquely forward, Ru direction der inclined downward from the operation direction of the driving link,
Stalker drive. The drive cylinder is arranged substantially in the vertical direction so that the piston protrudes downward from the cylinder tube of the drive cylinder and expands and contracts.
The stoker drive device according to claim 1. A stoker-type incinerator provided with the stoker drive according to claim 1 or 2.

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