JPH1062098A - Steel ball tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the clogging of steel balls by forming a steel ball outlet slit which extends from the opening peripheral part of a rotating drum rotatably provided in a tank main body toward a lower part in a peripheral direction but does not reach the lowermost part and has the dimension of width substantially equal to the dimension of diameter of a steel ball outlet. SOLUTION: A substantially semicircular cylindrical rotating drum 25 having an axis the same as that of a tank main body 22 is provided therein so as to be rotatable about the axis. A rotating and driving device 27 such as a motor is attached to one end of a rotating shaft 26 which extends axially from positions at both ends of the axis of the rotating drum 25 and passes through the tank main body 22. Then, a steel ball outlet slit 29, which extends from the opening peripheral part 28 of the rotating drum 25 toward a lower part in the peripheral direction with a length which does not reach the lowermost part, and has the dimension of width substantially equal to the dimension of diameter of a steel ball outlet 24, is formed at a position corresponding to the steel ball outlet 24 formed on the lower side part of the tank main body 22. Thus, the clogging of steel balls can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a steel ball tank. More specifically, the present invention relates to a steel ball tank capable of eliminating clogging of steel balls.

[0002]

2. Description of the Related Art In a boiler or the like, a heat exchanger is generally provided in the exhaust gas duct.

In the heat exchanger, dust contained in exhaust gas adheres to the heat transfer surface due to use, and the heat exchange performance deteriorates. Therefore, it is necessary to periodically remove the dust.

Conventionally, steel balls have been used to remove the dust.

To briefly explain the above, as shown in FIG. 3, a heat exchanger body 3 is provided in the middle of an exhaust gas duct 2 for passing exhaust gas 1 of a boiler (not shown). When an electric heating tube group 4 (electric heating surface) for heat exchange is arranged, a steel ball inlet 6 provided with a steel ball distribution mechanism 5 is provided at an upper portion of the heat exchanger main body 3, and A steel ball partition wall 7 is provided above the electric heating tube group 4, a steel ball outlet 8 is provided below the heat exchanger body 3, and a steel ball circulation device 9 is provided between the steel ball outlet 8 and the steel ball inlet 6. And a steel ball inflow / outflow channel 12 provided with a steel ball tank 11 capable of accommodating a steel ball 10 in the middle of the steel ball circulation device 9 is connected in parallel with the heat exchanger body 3.

As shown in FIG. 4, the steel ball tank 11 has a steel ball inlet 13 at an upper peripheral position, and a hopper portion 14 and a steel ball outlet 1 connected to the hopper portion 14 at a lower axial position.
5, a steel ball discharge pipe 17 provided at the axial center of the tank body 16 and having a lower end inserted into a steel ball outlet 15 so as to be movable up and down, and a steel ball discharge pipe 17 And an elevating device 19 such as an elevating cylinder that raises and lowers through the support member 18.

Reference numeral 20 denotes a valve provided on the inlet side of the steel ball inflow / outflow passage 12, and reference numeral 21 denotes a support member for supporting the tank body 16.

An elevating device 19 such as an elevating cylinder
Is extended to lower the upper end opening of the steel ball discharge pipe 17 through the support member 18 to a position lower than the upper surface of the steel ball 10 housed inside the tank body 16, whereby the steel ball discharge pipe 17 Steel ball 1 inside tank body 16 to upper end opening
Flow through the steel ball discharge pipe 17 for inflow and outflow of the steel ball.
The steel ball 10 is sent to the steel ball circulating device 9 via the second ball 2.

When the steel ball 10 is sent to the steel ball circulating device 9, the steel ball circulating device 9 is operated to send the steel ball 10 to the steel ball inlet 6 on the upper part of the heat exchanger body 3, and the steel ball inlet The steel ball 10 is dropped via the steel ball distribution mechanism 5 provided in the steel ball distribution unit 5 while being uniformly distributed to the respective sections of the steel ball partition wall 7, and the dust adhering to the electric heating tube group 4 is removed. And scrape it off.

The steel balls 10 from which the dust has been scraped off are collected at the steel ball outlet 8 at the lower part of the heat exchanger main body 3 and are circulated to the steel ball inlet 6 at the upper part of the heat exchanger main body 3 by the steel ball circulating device 9. Thus, dust adhering to the electric heating tube group 4 is repeatedly scraped off.

When the dust is sufficiently scraped off, the steel ball 10 is returned to the steel ball tank 11.

At this time, a lifting device 19 such as a lifting cylinder is used.
Is contracted to raise the upper end opening of the steel ball discharge pipe 17 via the support member 18 so as to be at a position higher than the upper surface of the steel ball 10 housed inside the tank body 16. The discharge of the steel ball 10 from the inside is prevented.

[0013]

However, the above-mentioned conventional steel ball tank has the following problems.

That is, as described above, the steel ball discharge pipe 17 is raised and lowered to discharge the steel ball 10 from the upper end opening of the steel ball discharge pipe 17, but as the capacity of the steel ball tank 11 increases, the steel ball 10 becomes larger. However, there has been a problem that the steel ball 10 is easily clogged, and it has been said that it is difficult to operate the steel ball tank 11 well even if the steel ball tank 11 is 1.5 m or more in diameter.

This is because, as the capacity of the steel ball tank 11 increases, the diameter of the steel ball discharge pipe 17 increases, and the amount of the steel ball 10 that can flow into the steel ball discharge pipe 17 increases. It is considered that the steel balls 10 exceeding the amount try to flow into the steel ball discharge pipe 17 at one time, and the steel balls 10 stick to each other due to dust and the like attached to each other to form a bridge.

The present invention has been made in view of the above circumstances, and has as its object to provide a steel ball tank capable of eliminating clogging of steel balls.

[0017]

According to the present invention, a steel ball inlet 23 is provided at an upper portion of a cylindrical tank body 22 whose axis extends substantially in a horizontal direction, and a steel ball outlet 24 is provided at a lower portion of the tank body 22. And a rotating drum 25 having a substantially semi-cylindrical shape and extending in the axial direction from the axial center position of both ends and projecting a rotating shaft 26 penetrating the tank body 22 inside the tank body 22.
Is rotatably arranged, and a rotation drive device 27 is attached to at least one of the rotation shafts 26 at a position corresponding to the steel ball outlet 24 on the peripheral surface of the rotation drum 25 with the opening edge 28 facing upward. A steel ball exit slit 29 extending from the opening edge 28 of the rotating drum 25 downwardly in the circumferential direction to such a length that it does not reach the lowermost portion, and having a width substantially equal to the diameter of the steel ball outlet 24.
Formed on a steel ball tank.

According to the above means, the following effects can be obtained.

When the steel balls 31 housed in the rotating drum 25 are taken out, the rotation driving device 27 is driven to incline the rotating drum 25 at a required angle around the rotation shaft 26 so that the lower portion of the tank body 22 A rotating drum 25 is inserted into the formed steel ball outlet 24.
Of the steel ball outlet slit 29 formed on the peripheral surface of the steel ball.

Then, all the steel balls 31 accommodated in the rotating drum 25 are tilted together with the rotating drum 25, so that the steel balls 31 exceeding the angle of repose are surely removed from the steel ball exit slits 2.
9 is dropped to the outside through the steel ball outlet 24.

Then, by continuously increasing the inclination of the rotating body 25 by the rotation driving device 27, the steel balls 31 exceeding the angle of repose fall one after another to the outside, and finally become clogged. , All the steel balls 31 are cut out.

As described above, according to the present invention, the rotating cylinder 25
By changing the inclination of the steel balls 31, the steel balls 31 can be cut out without any clogging without any trouble even if the steel balls 31 are enlarged.

[0023]

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

FIGS. 1 and 2 show an embodiment of the present invention.

A substantially cylindrical tank body 22 having an axis extending in a substantially horizontal direction is provided. A steel ball inlet 23 is provided at an upper portion of the tank body 22, and a steel ball outlet 24 is provided at a lower portion of the tank body 22.

An approximately semi-cylindrical rotary drum 25 having the same axis as the tank main body 22 is provided inside the tank main body 22.
Are arranged rotatably about the axis, and a rotating shaft 26 extending in the axial direction from both axial centers of the rotating body 25 and penetrating through the tank body 22 is protruded, and at least one of the rotating shafts 26 has a motor or the like. Is mounted.

Further, the lowermost portion of the lower surface of the rotating drum 25 is located at a position corresponding to the steel ball outlet 24 on the circumferential surface of the rotating drum 25 with the opening edge 28 facing upward from the opening edge 28 of the rotating drum 25 downward in the circumferential direction. And reach the steel ball outlet 2
The steel ball outlet slit 29 having a width substantially equal to the diameter of the diameter 4 is formed.

Reference numeral 30 denotes a support member that hinders the rotation shaft 26, and reference numeral 31 denotes a steel ball accommodated in the rotation drum 25.

When the diameter of the steel ball 31 is 3 mm or the like, the tank body 22 is used to prevent the steel ball 31 from biting.
The gap between the rotating body 25 and the rotating body 25 is smaller than the diameter of the steel ball 31, for example, about 1.5 to 2 mm.

Next, the operation will be described.

The process of scraping dust adhering to the heat transfer surface of the heat exchanger using steel balls is the same as in FIG.

In the present invention, when taking out the steel ball 31 housed in the rotary drum 25, a rotary drive device 27 such as a motor is driven to incline the rotary drum 25 about the rotary shaft 26 at a required angle, and the tank is tilted. A steel ball outlet slit 29 formed on the peripheral surface of the rotating drum 25 is aligned with a steel ball outlet 24 formed on the lower side of the main body 22.

Then, all the steel balls 31 accommodated in the rotating drum 25 are tilted together with the rotating drum 25, so that the steel balls 31 exceeding the angle of repose are surely removed from the steel ball exit slit 2.
9 is dropped to the outside through the steel ball outlet 24.

Then, by continuously increasing the inclination of the rotating drum 25 by the rotation driving device 27, the steel balls 31 exceeding the angle of repose fall one after another to the outside, and finally become clogged. , All the steel balls 31 are cut out.

As described above, according to the present invention, the rotating cylinder 25
By changing the inclination of the steel balls 31, the steel balls 31 can be cut out without any clogging without any trouble even if the steel balls 31 are enlarged.

It should be noted that the present invention is not limited to only the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

[0037]

As described above, according to the steel ball tank of the present invention, an excellent effect that clogging of steel balls can be eliminated can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an example of an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a schematic system diagram of a conventional example.

FIG. 4 is a partially enlarged view of FIG. 3;

[Description of Signs] 22 Tank main body 23 Steel ball inlet 24 Steel ball outlet 25 Rotary barrel 26 Rotary shaft 27 Rotation drive device 28 Opening edge 29 Steel ball outlet slit 30 Support member 31 Steel ball

Claims (1)

[Claims] 1. A steel ball inlet (23) is provided on an upper part of a cylindrical tank body (22) whose axis extends substantially in a horizontal direction, and a steel ball outlet (2) is provided on a lower part of the tank body (22).
4), a rotation having a substantially semi-cylindrical shape and extending in the axial direction from the axial position of both ends and projecting a rotation shaft (26) penetrating through the tank body (22) inside the tank body (22). The body (25) is rotatably disposed, a rotation drive (27) is attached to at least one of the rotation shafts (26), and the rotation body (25) with the opening edge (28) facing upward. At the position corresponding to the steel ball outlet (24) on the peripheral surface, the rotating drum (2)
The steel ball outlet (24) extends from the opening edge (28) of 5) downwardly in the circumferential direction so as not to reach the lowermost portion, and has a steel ball exit (24)
Steel ball exit slit with width almost the same as the diameter of (29)
A steel ball tank characterized by forming: