JPS6221058B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a circular cooler for cooling particulate materials such as sintered ore.

There are various types of conventional sintered ore coolers, but all of them are mechanical seals, and they have extremely good sealing performance because they have gaps in them to allow for smooth running and rotation. It is said that the air leakage rate is several 10%. Therefore, the power cost of the cooling blower becomes high, which causes many problems. The side of the seal part of a conventional cooler is shown in Figures 1 to 3.
This will be explained based on the diagram.

As shown in Figures 1 and 2, the sintered ore cooler is
A large number of troughs 3 are provided continuously in the circumferential direction between the two inner and outer rotating frames 1 and 2 that rotate together around the same center, and these troughs 3 are used to control the rotation of the rotating frames 1 and 2. The sintered ore is fed onto the ventilation plate 5 of the trough 3 at an ore feeding chute (not shown), and the sintered ore is transported by the trough 3 as the rotation frames 1 and 2 rotate. While traveling, it is cooled by cooling air sent from below the trough 3,
Thereafter, at an ore discharge chute (not shown), the ventilation plate 5 rotates and tilts downward around the horizontal support shaft 6 at the front end, so that the sintered ore on the ventilation plate 5 is discharged to the ore discharge chute. ing. Note that one end of the ventilation plate 5 is supported by the horizontal support shaft 6 and is located near the other end of the adjacent ventilation plate 5, and the other end is supported by the running wheels 7.
An arm 9 to which a shaft support boss 8 is connected is fixed integrally, and when the traveling wheel 7 falls into a recess (not shown) in the rail 4 at the ore discharge chute, the arm 9 A ventilation plate 5 is integrally rotated and tilted downward around the horizontal support shaft 6 to discharge the sintered ore placed on the ventilation plate 5. In the figure, 10 is a spoke for connecting the rotating frames 1 and 2, and 11 and 12 are side walls provided on both sides of the trough 3.

Such a sintered ore cooler needs to be configured so that the cooling air sent for cooling the sintered ore does not leak to the outside before reaching the ventilation plate 5.

Therefore, conventionally, an air seal structure as shown in FIG. 3 has been adopted. In the same figure, reference numeral 13 denotes a fixed position air chamber provided to feed cooling air into the trough 3 from below. At the upper end of this air chamber 13, there is a rubber seal plate 15 which is in contact with the upper surface of the lower end horizontal extension part 14 of the trough 3.
is installed. Further, at the lower end of the trough 3, there is a rubber seal plate 17 that makes point contact with the end surface of a contact plate 16 that projects horizontally from the inner surface of the air chamber 13.
is installed. Furthermore, side wall 1
The lower ends of 1 and 12 are oriented perpendicularly to the outer peripheral surface of the shaft supporting boss 8 and have end surfaces in contact with the outer peripheral surface of the shaft supporting boss 8 in order to prevent air leakage from the shaft supporting boss 8. A rubber seal plate 18 is attached. In this air seal structure, the cooling air sent from inside the air chamber 13 to the trough 3 attempts to be prevented from leaking to the outside by the three seal plates 15, 17, and 18, but the trough 3 By traveling, the seal plate 17 comes into point contact with the contact plate 16 and moves together with the trough 3. At this time, the seal plate 17 is worn out due to friction with the contact plate 16, and due to rattling of the trough 3 during travel. A gap may occur between the seal plate 17 and the contact plate 16, and as a result, cooling air leaks from between the seal plate 17 and the contact plate 16. This leaked cooling air tries to be prevented from leaking to the outside by the contact between the seal plate 15 and the horizontal protrusion 14, but the seal plate 1
5 has been damaged due to upward warping due to internal pressure and uneven running of the trough 3. Therefore, the cooling air leaking from the seal plate 17 is absorbed by the seal plate 1.
5 and the horizontal protrusion 14 to the outside. Further, since the seal plate 18 is oriented perpendicularly to the outer circumferential surface of the shaft support boss 8 and its end face is in contact with the outer circumferential surface of the shaft support boss 8, it is assumed that the cooling air reaches the inside of the seal plate 18. When the cooling air leaks, the seal plate 18 is pushed outward by this cooling air, and a gap is likely to be created between the seal plate 18 and the shaft support boss 8, and as a result, the cooling air inside the seal plate 18 is pushed outward. During this period, there were times when the leakage occurred from outside.

As described above, in the conventional type, there are many sealing parts, and it is difficult to ensure the sealing parts to ensure smooth movement of the trough, resulting in a considerable amount of air leakage.

On the other hand, the ice-sealing method, which is another conventional example, is considered the most effective means for preventing air leakage. In order to prevent cooling air from blowing through, it is necessary to completely seal the ore supply and discharge points, but continuous supply and discharge requires a large chute. In addition, the supply is discontinuous, and there are many difficulties in terms of uniform supply and layout for uniform cooling, making it difficult to put it into practical use.

The present invention provides an ultra-low leakage type circular cooler in which almost no cooling air leaks to the outside when cooling granular materials by introducing cooling air, and in particular a circular cooler intended for cooling sintered ore. The purpose is to provide.

In order to achieve the above object, the circular cooler of the present invention is provided with a large number of supporting plates having ventilation plates capable of loading particulate matter disposed in the circumferential direction at the lower part of the side wall forming a double circular ring. The support plate is attached to the side wall so that it can rotate up and down, and air chambers that are integrated with the side wall and independent are placed below each support plate, and an opening is provided at the bottom of each air chamber to allow particulate matter to be discharged. In addition to having a closed structure from both side walls to the opening, a damper that can be opened and closed is provided in the introduction pipe that leads to the air chamber, and an annular communication channel is formed on the air chamber group side with each introduction pipe communicating with the inside. The lower part of the annular passage is water-sealed, and cooling air is introduced into the annular passage, and each air chamber is provided with a bottom cover that can open and close the opening of the air chamber, and a discharge section is provided. A bottom cover driving device is provided to open the bottom cover at one point and close the bottom cover at the remaining portion.

According to the present invention having such a structure, cooling air can be supplied through the annular passage without leakage due to the water seal structure for the lower part of the annular passage, and the cooling air supplied into the air chamber can be Air can be prevented from leaking in the rest of the part except for the discharge part by closing the bottom cover against the opening, and in the particulate matter discharge part, the lower end of the opening is opened by closing the damper. It is possible to prevent air leakage while allowing particulate matter to be discharged.

An embodiment of the present invention will be described below based on FIGS. 4 to 19. First, let's talk about the circular cooler.
Two inner and outer rotating frames 20 and 21 that rotate together around the same center are connected by spokes 22 at a plurality of locations in the circumferential direction. Support plates 23 for loading granular materials (such as sintered ore) are disposed in each of the plurality of spaces formed by the two rotating frames 20 and 21 and the spokes 22.
It consists of Downward running rails 25 are attached to the lower surfaces of the rotating frames 20 and 21, and a number of support rollers 26 for supporting these running rails 25 are attached to the base frame 27 side. Therefore, the rotating frame 24 can rotate around the same center mentioned above. A supply chute section 28 is provided above the rotation path of the rotary frame 24 at one point, and a discharge chute section 30 is provided below the rotation path adjacent to the supply chute section 28 that goes around the rotation direction 29 approximately once. ing. The top plate of the support plate 23 is formed as the ventilation plate 31, and two pieces are disposed in the radial direction in each of the above-mentioned spaces. The inner and outer ends of both support plates 23 in the radial direction are supported by horizontal support shafts 32 rotatably attached to the rotation frames 20 and 21. Arms 33 extending on the side opposite to the support plate 23 are fixed to these horizontal support shafts 32, and opening/closing rollers 34 are attached to the upper free ends of these arms 33. A guide rail 35 on which each opening/closing roller 34 acts is arranged concentrically with the rotating frame 24, and this guide rail 35 is connected to the construction frame 36 from the base frame 27 side.
It is fixed to. 37 is a side roller, and 38 is a side guide rail. Note that the rotating frames 20, 21
Side walls 39 and 40 are disposed on the upper part of the frame.

In the circular cooler configured as described above, the particulate matter 41 supplied from the supply chute section 28 onto the ventilation plate 31 between the side walls 39 and 40 is sent from below the support plate 23 while the rotating frame 24 rotates. It is cooled by the cooling air 42 that comes next, and then the exhaust chute section 3
0, since the support plate 23 rotates downward around the axis of the horizontal support shaft 32, the support plate 23
It falls from above into the discharge chute section 30 and is discharged. The support plate 23 is supported horizontally during normal cooling by the arrangement of the guide rail 35 that receives the opening/closing roller 34, as shown by the solid line in FIG.
Further, when discharging particulate matter, it is rotated and tilted downward as shown by the imaginary line in FIG. Incidentally, regarding the rotational tilting, it is also possible to attach a cylinder device to the rotating frame 24 side.

Next, the cooling air supply structure and seal structure will be explained. 43 is an air chamber, and rotation frames 20, 2
1 and the lower surfaces of the spokes 22, and are arranged in an independent manner so as to face the support plate 23 in each space, and are constructed integrally with the rotating frame 24. It rotates together with 24. An opening 44 is formed at the bottom of each air chamber 43 for discharging particulate matter 41 that falls due to rotational inclination of the support plate 23 to the discharge chute section 30. An introduction pipe 45 communicating with the inside of the air chamber 43 is superimposed on the side of each air chamber 43, and the group of introduction pipes 45 has a pair of inner and outer annular plates 46 concentrically integrated with the rotating frame 24. ，
It is located within an annular channel 48 formed by 47. Here, the annular plate 4 is lower than the lower edge of the introduction pipe 45.
The lower edges of numbers 6 and 47 are set to be lower. An annular seal water channel 49 is formed on the base frame 27 side, and seal water 50 is poured into the water channel 49 . Both annular plates 46 and 47 are configured to rotate within the sealing waterway 49. At a position displaced by 180 degrees with respect to the supply chute section 28, an air pipe 51 is disposed on the base frame 27 side, and this air pipe 5
1 has a certain length in the rotational direction and is formed in an arc shape with the same center as the axis. The upper end of the air pipe 51 passes through the seal waterway 49 and enters the annular passage 48, and the air duct 5 is connected at the lower end.
2 are connected.

According to the above configuration, the cooling air 42 is supplied to the air duct 52, the air pipe 51, the annular passageway 48, and the introduction pipe 4.
5 into each air chamber 43 and through the ventilation plate 31 of the support plate 23.
1 and cools the particulate matter 41. In such air introduction, the space between the annular passage 48 and the blower pipe 51 is sealed by sealing water 50 poured into the sealing water channel 49 . Note that blow-through occurs in the supply/discharge section where there is no particulate matter 41 on the ventilation plate 31, but in order to prevent this, a damper 53 that closes in the supply/discharge section and opens in other locations is installed in the introduction pipe. 45. Therefore, in the supply/discharge section, the cooling air 42 can be cut off between the annular passage 48 and each air chamber 43.

A seal member 54 is provided on the outer periphery of the lower end of the opening 44.
is attached, and a bottom lid 55 whose lower end opening can be opened and closed via the seal member 54 is provided. That is, a bracket 56 extending forward in the rotational direction 29 is connected to each opening 44, and the bottom cover is attached to the upper surface of a lever 58 which is attached to the free end of the bracket 56 via a horizontal pin 57 so as to be able to swing up and down. 55 is installed. A bottom lid driving device 59 is provided for opening the bottom lid 55 in the discharge chute portion 30 and closing the bottom lid 55 in the remaining portion. In this embodiment, a rail 60 laid on the base frame 27 and a roller 61 guided by the rail 60 and attached to the free end of the lever 58 are used as the bottom cover driving device 59, and the discharge chute section 30 At the same time, a cutout is formed in the rail 60, and inclined rail parts 60a, 6 are formed near the cutout.
It is set to 0b. However, as a bottom cover drive device,
Other mechanisms such as an air cylinder device or an electric cylinder device may also be employed.

During operation in a location other than the discharge chute section 30, the roller 61 is guided by the horizontal portion of the rail 60 and moves upward as shown on the left side in FIGS. 7 and 8, and in FIG. 9A. The bottom cover 55 is pressed against the opening 44 via the sealing member 54, so that the open lower end is closed (sealed). When the air chamber 43 approaches the exhaust chute 30 by a certain distance as shown in FIG. 9A, this approach is detected and the damper 53 is closed to cut off the supply of the cooling air 42. When the air chamber 43 further advances, the roller 61 is guided by the inclined rail portion 60a as shown in FIG. When the rail cutout is reached, the bottom cover 55 is completely opened as shown on the right side of FIG. 8 and FIG. 9C, and all of the particulate matter 41 is discharged. The bottom cover 55 gradually closes as the roller 61 is guided by the inclined rail portion 60a as shown in FIG. 9D, and the supply chute is completely closed as shown in FIG. 9E. Moving on to part 28.

The side rollers 37 and side guide rails 38 described above suppress the horizontal force generated on the rotating frame 24 and allow the circular cooler to rotate normally.

As described above, according to the present invention, cooling air can be supplied through the annular canal without leakage due to the water seal structure at the bottom of the annular canal, and there is no air leakage in the air chamber. The supplied cooling air can be prevented from leaking in other parts except for the discharge part by the closing movement of the bottom cover relative to the opening, and in the discharge part, by the closing movement of the damper and the opening movement of the bottom cover. Therefore, although the lower end of the opening can be opened to discharge particulate matter, air leakage can be prevented. As described above, according to the present invention, it is possible to provide an ultra-low leakage type circular cooler in which almost no cooling air leaks to the outside when cooling particulate matter by introducing cooling air.

[Brief explanation of the drawing]

Fig. 1 to Fig. 3 show a conventional example, Fig. 1 is a partial plan view, Fig. 2 is a partial side view, Fig. 3 is a vertical sectional view of the main part, and Fig. 4 to Fig. 9 are One embodiment of the present invention is shown in which Fig. 4 is a partially cutaway plan view, Fig. 5 is a partially cutaway plan view of the main part, Fig. 6 is a cross-sectional plan view of the same, and Fig. 7 is a vertical cross-sectional front view of the main part. Figure 8 is a vertical cross-sectional side view of the main part,
FIG. 9 is a schematic side view of the main parts showing the operating state. 20, 21...Rotating frame, 23...Support plate, 24
...Rotating frame body, 28... Supply chute section, 30...
...Discharge chute section, 31...Ventilation plate, 39, 40
... side wall, 41 ... particulate matter, 42 ... cooling air, 43 ... air chamber, 44 ... opening,
45... Introduction pipe, 46, 47... Annular plate, 48...
... Annular passage, 49 ... Seal waterway, 51 ... Air pipe, 53 ... Damper, 54 ... Seal member,
55... Bottom cover, 58... Lever, 59... Bottom cover driving device, 60... Rail, 60a, 60b... Inclined rail portion, 61... Roller.

Claims (1)

[Claims] 1. At the bottom of the side wall forming a double ring, a large number of support plates having ventilation plates capable of loading particulate matter are arranged in the circumferential direction, and these support plates are attached to the side wall so as to be vertically rotatable, and each support plate is Below the board, side wall and 1
Each air chamber has an independent air chamber structure, an opening is provided at the bottom of each air chamber so that particulate matter can be discharged, and the structure is closed from both side walls to the opening. A damper that can be opened and closed is provided in the pipe, and an annular canal is formed on the air chamber group side with each inlet pipe communicating with the inside.The lower part of this annular canal is sealed with water, and a cooling pipe is installed inside the annular canal. Each air chamber is provided with a bottom lid configured to introduce air and capable of opening and closing the opening of the air chamber, and a bottom lid drive device is provided that opens the bottom lid at the discharge portion and closes the bottom lid at the remaining portion. Features a circular cooling machine.