JP3011003B2 - Stalker drive structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for driving a stoker such as an incinerator.

[0002]

2. Description of the Related Art Conventionally, a stoker S of an incinerator as shown in FIGS. 2 and 3 has a movable grate frame 1, a fixed grate frame 2, and a plurality of strip-shaped rostrles (grate) installed on each frame. 3, each roaster 3 is inclined obliquely upward at an appropriate angle in the direction of transport of the combustion material. The movable gusts 3a supported by the movable grate frame 1 and the fixed gusts 3b supported by the fixed grate 2 are alternately arranged along the moving direction of the combustion material. The stalker drive unit connects the movable grate frame 1 and the drive shaft 4 via a link mechanism 5 and connects the cylinder device 6 to the drive shaft 4 via a second link mechanism 7. , The movable system rod 3a slides on the fixed system rod 3b.

The link mechanism 5 includes a connection plate 5a which integrally moves with the movable grate frame 1 and the movable roster 3a, a link plate 5c having one end swingably connected to the connection plate 5a by a pin 5b, and a link. Plate 5
The other end of the lever 5e is connected to a lever 5e having a pin connection 5d, and the base end of the lever 5e is mounted and fixed to the drive shaft 4.

As shown in FIG. 3, a chute 8 for discharging incineration ash and the like is provided below the stoker S, and a link plate 5c of the link mechanism 5 has a through hole 9 formed in a side wall 8a of the chute 8. Penetrates. For this reason, an elastic bellows 10 is provided as a sealing means between the side wall 8a of the chute 8 and the link plate 5c.

[0005]

However, in the above-mentioned conventional structure, the bellows 10 repeatedly expands and contracts as the link plate 5c moves in and out, so that it is easily mechanically fatigued and has a short life. . For this reason, there is a problem that air and dust in the chute 8 leak to the outside due to damage to the bellows 10. Further, when the position of the stalker S moves up and down due to aging and the position of the pin connection 5b shifts, the swing width of the lever 5e is changed despite the change in the positional relationship between the pin connection 5b and the pin connection 5d. Since there is no change, there is a problem that an excessive force is generated in the drive system including the link plate 5c and the lever 5e.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a stoker driving portion structure which has excellent durability and can cope with positional deviation of the stoker due to aging. And

[0007]

In order to solve the above-mentioned problems, a drive unit structure of a stoker according to the present invention is arranged such that a chute is disposed below a stoker having a movable roster that moves in and out of a certain direction, At the lower part, there is provided a connection plate that moves out and back together with the movable system roster. One end of the link plate is swingably pin-connected to this connection plate, and the link plate is freely retractable into a through hole formed in the side wall of the chute. It is inserted and arranged, the middle of the lever is pin-coupled to the other end of the link plate, and a pair of cylinder devices that drive the lever out and back along the link plate axis are connected to both sides of the lever. A loosely inserted seal pipe is inserted into the through hole of the chute so as to be able to come and go, and one end of the seal pipe is fixed to the connection plate and closed, and A seal means for slidably and air-tightly holding the seal pipe and sealing between the outer peripheral surface of the seal pipe and the side wall of the chute is provided, and the seal means has an insertion hole for inserting the seal pipe. A configuration including a wind box forming a seal gas sealing space around the seal pipe, and a seal material that slides on the outer peripheral surface of the seal pipe and seals between the wind box and the seal pipe around the insertion hole. It was done.

[0008]

According to the above construction, when a pair of cylinder devices are driven synchronously and the lever is repeatedly inverted within a proper range and moved back and forth, a link plate pin-connected to the lever and a connection plate pin-connected to the link plate are provided. And the seal pipe connected to the connection plate moves out and within a certain distance,
The movable system connected to the connection plate moves out. At this time, the axis of the link plate is parallel to the extending / retracting direction of the connection plate, and the two pin connections at both ends of the link plate repeatedly move on a straight line along the axis of the link plate.

When the stalker is displaced up and down due to aging, and the position of the pin connection between the connection plate and the link plate is displaced due to this displacement, the rotation of the link plate in both the pin connections. Is permitted, and the displacement of the position of the pin connection between the lever and the link plate caused by the displacement of the link plate is permitted by the retraction of the cylinder device. Therefore, no unreasonable force acts on the drive system of the stoker due to aging.

Further, in the sealing means, the sealing material slidably contacting the outer peripheral surface of the seal pipe slidably and air-tightly holds the seal pipe, and seals between the wind box and the seal pipe around the insertion hole. The air and dust in the chute do not leak out. At this time, when the seal pipe moves in and out, the sealing means stays at the fixed position and slides on the outer peripheral surface of the seal pipe, so that the life is not shortened due to mechanical fatigue. Furthermore, by sealing high-pressure air and the like from inside and outside of the chute as a sealing gas into the sealing gas sealing space of the wind box, the seal material that seals between the wind box and the seal pipe around the insertion hole is worn. Also, the air and dust in the chute do not leak out. That is, when a gap is generated due to wear of the sealing material, the sealing gas having a high pressure in the wind box flows into the chute, so that the air in the chute does not leak outside.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. Members having the same functions as those described above with reference to FIGS. 2 to 3 are denoted by the same reference numerals, and description thereof is omitted. In FIG. 1, a seal pipe 21 which is inserted through a through hole 9 of a chute 8 so as to be able to freely move back and forth is loosely fitted to a link plate 5 c, fixed at one end to a connection plate 5 a, and closed at one end by a fixing plate 22. Therefore, the pin connection 5b between the connection plate 5a and the link plate 5c is located inside the seal pipe 21.

The sealing means 30 is for slidably and densely holding the seal pipe 21 around the through hole 9 to seal between the outer peripheral surface of the seal pipe 21 and the side wall 8a of the chute 8. The seal 31 includes a seal member 32, a seal holding ring 33, and a tightening bolt 34. The wind box 31 is attached to the through hole 9, has an insertion hole 31 a for inserting the seal pipe 21, and forms a seal gas filled space 31 b around the seal pipe 31. Wind box 31
The cylindrical sealing material receiving portion 31 is provided at the peripheral portion of the insertion hole 31a.
The seal member 32 attached to the seal material receiving portion 31c slides on the outer peripheral surface of the seal pipe 21 to seal the space between the wind box 31 and the seal pipe 21 around the insertion hole 31a. Further, by tightening the tightening bolt 34, the seal member 32 is pressed via the seal holding ring 33, and the surface pressure of the seal member 32 against the seal pipe 21 is adjusted. Further, the wind box 31 is provided with a gas supply port 35 for supplying high-pressure air as the seal gas G.

A lever 36 is provided at the other end of the link plate 5c.
Is pin-coupled 5d in the middle of the cylinder device 3 on both sides of the lever 36 and the side wall 8a of the chute 8.
7, 37 are interposed. This cylinder device 37,3
Numeral 7 drives the lever 36 to move back and forth along the axis of the link plate 5c.

The operation of the above configuration will be described below.
When the pair of left and right cylinder devices 37, 37 are driven synchronously and the lever 36 is repeatedly inverted and moved back and forth within an appropriate range, the link plate 5c pin-connected to the lever 36 and the pin plate 5c connected to the link plate 5c are connected. Plate 5a
In addition, the seal pipe 21 connected to the connection plate 5a moves back and forth within a certain distance, and the movable rooster 3a connected to the connection plate 5a moves back and forth. At this time, the axis of the link plate 5c is parallel to the retreating direction of the connection plate 5a, and the two pin connections 5b and 5d at both ends of the link plate 5c repeatedly move on a straight line along the axis of the link plate 5c. I do.

If the stalker S is displaced up and down due to aging, and the position of the pin connection 5b between the connection plate 5a and the link plate 5c is displaced due to this position displacement, the two pin connections 5b, By allowing the rotation of the link plate 5c at 5d, the displacement of the link plate 5c is allowed, and the displacement of the position of the pin 36 between the lever 36 and the link plate 5c caused by the displacement of the link plate 5c is determined by the cylinder device 37. Allowed by leaving 37. Therefore, no unreasonable force acts on the drive system of the stoker due to aging.

Further, the seal pipe 21 retreats together with the link plate 5c, and the sealing means 30
1 is slidably and airtightly held to seal between the outer peripheral surface of the seal pipe 21 and the side wall 8a of the chute 8,
The air and dust in the chute 8 do not leak outside.

That is, the sealing material receiving portion 31c of the wind box 31
The sealing material 32 attached to the seal pipe 21 is in sliding contact with the outer peripheral surface of the seal pipe 21, and seals between the wind box 31 and the seal pipe 21 around the insertion hole 31a. In addition, when the link plate 5c is extended or retracted, the seal material 32 stays in the fixed position and slides on the outer peripheral surface of the seal pipe 21, so that the life is not shortened due to mechanical fatigue.

Further, high-pressure air or the like from the inside and outside of the chute 8 is sealed as a sealing gas G from the gas supply port 35 into the sealing gas sealing space 31b of the wind box 31, so that the sealing material is rubbed by the sealing pipe 21. Even if 32 wears, the air and dust in the chute 8 do not leak out. That is, when a gap is generated due to wear of the sealing material 32, the sealing gas G having a high pressure in the wind box 31 flows into the chute 8.
The air inside does not leak out.

[0019]

As described above, according to the present invention, the displacement of the link plate is allowed in the connection of both pins, and the displacement of the position of the pin connection between the lever and the link plate caused by the displacement of the link plate is controlled by the cylinder. By allowing the device to move in and out, excessive force does not act on the drive system of the stalker due to aging. Further, since the sealing material of the sealing means stays in the fixed position and slides on the outer peripheral surface of the seal pipe, the life is not shortened due to mechanical fatigue. Furthermore, even if the sealing material is worn, it is possible to prevent the air in the chute from leaking out due to the high-pressure sealing gas in the wind box flowing into the chute.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of a drive unit of a stalker according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the inside of a conventional incinerator.

FIG. 3 is a sectional view showing a structure of a driving unit of a conventional stalker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Movable grate frame 3a Movable rostor 4 Drive shaft 5a Connection plate 5b, 5d Pin connection 5c Link plate 5e Lever 8 Chute 9 Through hole 30 Sealing means 31 Wind box 31a Insertion hole 31b Seal gas sealing space 32 Seal material 36 Lever 37 Cylinder device

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23H 11/20 F23H 7/08 F23H 17/00

Claims (1)

(57) [Claims] 1. A chute is arranged below a stoker having a movable roster that moves in a fixed direction, and a connection plate that moves integrally with the movable roster is provided below the stoker. One end is pivotally connected with a pin, and the link plate is inserted through a through hole formed in the side wall of the chute so as to be able to freely move back and forth.
The other end of the link plate is pin-connected to the middle of the lever, and a pair of cylinder devices that drive the lever out and back along the axis of the link plate are connected to both sides of the lever. The seal pipe is inserted through the through hole of the chute so as to be able to come and go, and one end of the seal pipe is fixed to the connection plate and closed, and the seal pipe is slidably and airtightly held around the through hole. A seal means for sealing between the outer peripheral surface of the chute and the side wall of the chute, the seal means having an insertion hole for inserting a seal pipe, and forming a seal gas sealing space around the seal pipe; A stoker drive unit structure comprising: a seal member that slides on an outer peripheral surface of a seal pipe and seals between a wind box and the seal pipe around an insertion hole.