JPH0133540Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a silo or a slot bunker, etc. through a slit provided at the bottom of the table, and a stable granular material such as coal is displaced onto a horizontal table using a rotating blade. This invention relates to a rotary scraping device for scraping onto a conveyor or the like outside the table.

2. Prior Art As shown in FIG. 1, a conventional rotary scraping device has a slit 4 over the entire circumference between a horizontal table 3a provided on the lower outer periphery of a conical central cone 3 and a silo cylinder wall 2. A granular accommodation material 5 such as coal is formed and pushed out through the slit 4.
is received on the horizontal table 3a and stabilized to form a mountain based on its angle of repose, and the mountain of the granular material 5 such as coal is broken down by a rotary blade 7 rotated by a motor and scraped out to the outside of the horizontal table 3a. It is configured to be loaded onto a rotary table 14 directly below. The motor 6 is installed on a casing 10, and a rotating blade 7 is attached to a downward rotating shaft 7a. Rails 12, 12 laid on the structure 11
A casing 10 is attached to a cart 9 that is driven by a motor 8. Rail 12, 12
are laid substantially parallel to the slit 4, so as the truck 9 travels, the rotating blades 7 move along the slit 4 around its outer periphery and scrape out the granules 5 on the horizontal table 3a. A rotary table 14 is installed as a conveyor at the bottom of the structure 11, and is rotated in a direction opposite to the cart 9 by a motor 13 installed on a horizontal frame 11a.

The granules 5 scraped out by the rotating blades 5 are guided by the casing 10 and loaded onto the rotating table 14 directly below. The rotary table 14 is rotated by the motor 13 in a direction opposite to the cart 9. Therefore, the granular materials 5' such as coal scraped off by the rotary blades 7 are stacked and transported in a longitudinally distributed manner on the rotary table 14, and transferred to a delivery conveyor (not shown) using a scraper (not shown). It will be carried out.

In addition, Special Publication No. 11126 (1972), Japanese Patent Publication No. 140432 (1982)
The rotary scraping apparatuses disclosed in Japanese Patent Laid-Open No. 55-48085 also have rotary blades driven to rotate by a motor, just like the example shown in FIG. 1 above.

Problems to be solved by the present invention () When rotating the rotary blade 7 with the motor 6, the static resistance of the granular material 5 such as coal is relatively large, so the output of the motor 6 needs to be quite large. In this case, large motors are used. For this reason, the strength and rigidity of the casing 10 and the truck 9, which serve as the reaction force stand, must also be increased, making the structure large, heavy, and expensive.

() Furthermore, power supply equipment for supplying external power to the motor 6 that rotationally drives the rotary blade 7 is essential. Although nothing has been specifically disclosed about the external power supply means, the general configuration is that a bare power supply line is installed along the running track of the conveyor or trolley, and electricity is supplied by a current collection brush that slides into contact with the bare power supply line. Therefore, the equipment structure becomes complicated and expensive. Also,
Bare power lines not only pose a danger to humans, such as electric shock, but also a risk of fire due to current leakage or sparks that often occur at the contact point with the current collector brush, and in the case of coal, coal dust. The problem is that there is a high risk of explosion, making it an extremely dangerous facility.

() As mentioned above, it is very uneconomical to apply the expensive rotary scraping device to a small capacity silo or the like.

Therefore, the purpose of this invention is to rotate by utilizing the movement of a moving body such as a cart, rotating ring, or rotating table, and the static resistance received by the rotating blades biting into granular materials such as coal on a horizontal table. An object of the present invention is to provide a rotary scraping device such as a silo that rotates a blade, eliminates the need for a motor that rotates the rotary blade, and has an improved configuration that eliminates the need to supply external power to the motor. .

Means for Solving the Problems As a means for solving the problems of the above-mentioned prior art, a rotary scraping device such as a silo according to this invention is provided, examples of which are shown in FIGS. 2 to 14 of the drawings. As described above, a slit is provided at the bottom of a silo or slot bunker, etc., and particulate matter such as coal that slips out through the slit is caught on a horizontal table with a width sufficient to stabilize it based on its angle of repose. In the rotary scraping device, the pile of coal and other granular materials on the horizontal table is broken down by rotating blades and scraped onto a conveyor, etc. outside the horizontal table. , 50, etc., is provided with a support 1 substantially perpendicular to the horizontal tables 3a, 33a.
7, 37a, and 58 were provided, and rotating blades 7, 37, and 59 were installed horizontally and rotatably at a height position close to the upper surface of the horizontal table on this support.

(b) The rotating blades 7, 37, 59 pass through the slits 4, 34 to the horizontal tables 3a, 33.
It is formed to have an outer diameter and a blade shape that will penetrate sufficiently deeply into the piles of granular materials 5, 35 such as coal that have shifted upward, and will rotate as the movable bodies 14, 39, 50 move.

The rotary blades 7, 37, and 59 have a blade shape viewed perpendicularly to the center line of rotation in a radial arc shape, an involute shape, or a dogleg shape.

Function When the moving body such as the rotating table 14 serving as a conveyor is moved in a certain direction, the rotating blade 7 attached to the support 17 also moves around the outer periphery along the slit 4. At the same time, the freely rotatable rotary blades 7 penetrate deep enough one after another into the granular contents 5 such as coal that have been displaced onto the horizontal table 3a through the slits 4, and are subjected to static resistance, so that the rotational movement of the rotary table 14 is prevented. (Movement of the support 17), a rotational force is generated, and the support 17 rotates at approximately the same circumferential speed as the movement speed of the support 17. This rotation causes the rotary blade 7 to rotate the granular material 5 such as coal on the horizontal table 3a.
This involves breaking down the pile, scraping it out of the horizontal table 3a, and loading it onto the rotary table 14 directly below.

Embodiment Next, a preferred embodiment of this invention shown in FIG. 2 and subsequent figures will be described.

Figures 2 to 4 show a rotary scraping device for a silo, which is the first embodiment of this invention.
A slit 4 is formed between the lower end of the inverted conical hopper 2 provided at the lower part of the silo cylinder wall 1 and a horizontal table 3a provided with a constant width on the outer periphery of the lower part of the conical central cone 3. The granules 5 such as coal that have come out through the slit 4 are received on the horizontal table 3a and are stabilized by forming a mountain based on their angle of repose.

The rotary blade 7 rotates to a height position close to the upper surface of the horizontal table 3a, which is the upper end of a support 17 that is fixed to and stands upright on the inner diameter side of the rotary table 14, which is a conveyor that moves along the slit 4. It is freely installed horizontally. Further, the rotating blade 7 has a size such that it bites deep enough into the pile of granular materials 5 such as coal that have been displaced onto the horizontal table 3a through the slit 4 and receives static resistance, causing rotation as the rotating table 14 moves. It is formed with an outer diameter and a blade shape (radial arc shape).

The rotary table 14 has two beams 18, 18 on its lower surface. On the other hand, on the horizontal frame 11a of the structure 11 constructed on the ground, the slit 4 is
Rotatable guide roller tracks 19, 19 are provided concentrically with the guide roller track 1.
The beam 1 of the rotary table 14 is placed on the
8 and 18 are placed.

The beam 18 is located on the lower surface of the rotary table 14.
A rack 20 is arranged concentrically with the horizontal frame 1.
A pinion 21 rotatably driven by a motor 13 is provided on 1a, and this pinion 21 is connected to the rack 20.
The rotary table 14 is configured to be meshed with each other to move the rotary table 14 around in a constant direction at a constant speed.

Therefore, when the rotary table 14 is rotated in a constant direction at a constant speed by the motor 13, the rotary blade 7 attached to the support column 17 will move as follows.
Through the slit 4, the granular material 5 such as coal that has been displaced onto the horizontal table 3a is penetrated sufficiently deeply and rotated, and the rotating blade 7 breaks down the pile of granular material 5 such as coal and scrapes it out of the horizontal table 3a. Then, they are loaded onto the rotary table 14 directly below.

In the figure, 22... is the rotating table 1 due to the rotating blade 7.
4, the pile of coal and other particulate matter 5' gradually piles up directly under the rotary blade 7.
As the rotary table 14 moves, the blades are disintegrated in the longitudinal direction of the rotary table 14 and are not evenly distributed in long strips. As shown in FIGS. 3 and 5, the fixed blades 22 are positioned at a constant height h on the rotary table 14, and the circumference is divided into eight equal parts ( , the number of equal fractions is not limited to this).
It is supported in a cantilever manner by a guide plate 23 on the outer diameter side fixed thereto.

In the figure, 14a is a guide plate provided on the inner peripheral side of the rotary table 14, 15 is a scraper fixed to the structure 11 for reloading granular materials 5' such as coal on the rotary table 14, and 16 is the scraper 15. This is a delivery conveyor that carries out the granular materials 5 such as coal that have been transferred to the outside.

That is, the granules 5' loaded on the rotary table 14 and transported are transferred to the dispensing conveyor 16 directly below the granules 5' in order of arrival at the scraper 15 and carried out to the outside.

By the way, the following has been confirmed through experiments regarding the rotating blade 7. In other words, the dogleg-shaped blade shown as type A in Fig. 6, the arc-shaped blade shown as type B (however, they were classified into B ₁ and B ₂ depending on the width of the blade), and type C. For each of the shown involute-shaped blade models, this was rotated by the movement of the rotary table 14, which is a moving body, and the relationship between the amount of particulate matter scraped out per rotation of the blade and the traveling speed of the rotary table 14 was determined. The graph shown in Figure 7 was obtained.

In other words, for B ₁ , B ₂ types, and C types, there is no significant change in the amount of scraping per blade rotation due to differences in the width of the blades or differences in moving speed, but for type A blades, the amount of scraping per rotation does not change much. The amount of scraping is reduced to about 70% compared to other types.
In addition, when expanded to the actual machine, the scraping amount is approximately 30% to 45% of the forced rotation (however, 50t/h,
2.5 rpm is 100%. ), and the practicality is sufficient.

Second Embodiment In the case of the rotary scraping device of the second embodiment shown in FIG. 8, a rotary ring 25 serving as a movable body is installed at a position below the horizontal table 3a so as to be movable around it. The rotating ring 25 is rotated in one direction at a constant speed via a pinion 27 (or a friction wheel may be used) that is rotationally driven by a motor 26. The support column 17 is fixed to this rotating ring 25 and made to stand upright.
A rotating blade 7 is rotatably installed on the upper part of the support 17. The rotary blade 7 is installed approximately horizontally at a height close to the upper surface of the horizontal table 3a, and has a size that is large enough to bite deeply into the pile of granules 5 that have slipped onto the horizontal table 3a through the slit 4. It is said to be the diameter. A rotary table 14 serving as a conveyor is installed concentrically on the outer periphery of the rotary ring 25 at a position lower than the horizontal table 3a. This rotary table 14 includes the rotary ring 2
5 is rotated in the opposite direction.

Therefore, in the case of this rotary scraping device, when the rotary ring 25 is moved around in a certain direction, the rotary blades 7 bite into the granules 5 on the horizontal table 3a and rotate due to static resistance. The pile of granules 5 on the horizontal table 3a is broken down, scraped out of the horizontal table 3a, and loaded onto the rotary table 14.

Third Embodiment The third embodiment shown in FIGS. 9 and 10 is a rotary scraping device for slot bunkers.

That is, a long slit 34 is formed in the direction perpendicular to the plane of the paper between the lower end of the vertical support wall 31 and the horizontal table 33a at the lower end of the inclined wall 33, and two rows of slits 34 are formed on the left and right sides of the conveyor 36.
4 and 34 are provided in parallel.

A structure 41 that is long in the direction perpendicular to the plane of the paper is installed in the middle part of the two rows of slits 34, 34, and rails 32, 32 are laid on this structure 41. 32
is installed on top. A delivery conveyor 36 is installed at the bottom of the structure 41. A crank-shaped support arm 42 is installed on the upper part of the trolley 39 via a switching device 40, and a column 37a is attached to the tip of the support arm 42.
The rotating blade 37 is placed upright on the upper end of the support 37a.
is horizontally rotatably installed at a height close to the upper surface of the horizontal table 33a. The rotary blade 37 has an outer diameter large enough to penetrate sufficiently deeply into the pile of particles 35 etc. that have shifted onto the horizontal table 33a.

The switching device 40 has a support arm 42 as shown in FIG.
A vertical shaft portion 42a is provided with fan-shaped teeth 40a, and a worm 40b that meshes with the fan-shaped teeth 40a is rotationally driven by a motor 40c. In the figure, reference numerals 43 and 43' indicate positioning stoppers fixed on the carriage 39.

In the case of this embodiment as well, as the cart 39 moves, the rotary blade 37 moves the granules 3 on the horizontal table 33a.
5 and rotates due to static resistance, producing the action of scraping out the particulate matter 35. At this time, when the trolley 39 travels in the outward direction (traveling in the direction of arrow A in FIG. 10), the switching device 40 moves the rotary vane 37 to the left until its support arm 42 abuts the left positioning stopper 43. The granular contents 35 such as coal, which are displaced and pushed out onto the horizontal table 33a through the slit 34 on the left side, are scraped out and loaded onto the delivery conveyor 36 through the funnel-shaped casing 30. Furthermore, when the truck 39 travels on its return trip (travels in the direction of arrow B in FIG. The granular contents 35 such as coal, which have been displaced onto the horizontal table 33a through the right slit 34, are scraped out to the conveyor 36 by shifting to the right side.

Fourth Embodiment In FIGS. 11 and 12, for example, the cart 39 in the rotary scraping device shown in FIG. Pressurizing parts 46, 46' that alternately abut on the front and rear surfaces are fixedly provided, and a support arm 42 that rotates around a rotating shaft 47 is provided on the trolley 39, and a support arm 42 that rotates around a rotating shaft 47 is provided on the top of the support arm 42, and a support arm 42 that rotates on a column 37a that stands upright at the tip thereof. The blade 37 is rotatably installed,
Connect the tip of the crank arm 47' to the cable wire 45.
It shows a rotary scraping device connected to the

That is, when the truck 39 travels in the outward direction in the direction of arrow A, the pressurizing portion 46 comes into contact with the rear end surface of the truck 39, as shown in FIG. 11, thereby enabling the truck 39 to be pulled. At the same time, as the cable wire 45 is displaced, the support arm 42 is rotated via the crank arm 47' until it comes into contact with the left positioning stopper 43, and the rotary vane 37 is displaced to the left.
On the other hand, when the truck 39 travels on the return trip, the pressure section 46' is attached to the front end surface of the truck 39 as shown in FIG.
comes into contact with each other and enables the trolley 39 to be pulled. At the same time, as the cable wire 45 is displaced, the support arm 42 is rotated via the crank arm 47' until it comes into contact with the right positioning stopper 43', and the rotary vane 37 is displaced to the right.

Fifth Embodiment FIGS. 13 and 14 show a rotary scraping device configured to use an endless chain 51 to run a traveling cart 50 as a moving body.

The traveling cart 50 is configured to move around on rails 52 along a slit at the bottom of the silo.
In addition, an endless chain 5 is arranged concentrically with the rail 52.
1 is installed, and the endless chain 51 is a roller guide 5.
It is wrapped around the driving sprocket 54 located below the middle of parts 3 and 53.
Reference numeral 4 is designed to be rotationally driven by a motor (not shown). On the other hand, two couplers 55, 55 are attached to the front and rear positions of the side of the traveling truck 50, respectively, so as to be rotatable about a shaft 56.
5 is engaged with the endless chain 51, so that the traveling carriage 50 is pulled by the endless chain 51. Reference numerals 57 and 57 in FIG. 14 are positioning stoppers for the coupler 55, which are fixed to the carriage 50. A support 58 stands upright on the traveling truck 50, and a rotary blade 59 is installed horizontally and rotatably at the upper end of the support 58.

Effects of the Present Invention As described above in detail in conjunction with the embodiments, the scraping device of this invention does not require any motor for rotationally driving the rotary blades 7, 37, 59. Therefore, there is no need for power supply equipment to the motor, which greatly simplifies the equipment structure.
In addition, the facility is safe for workers, who do not have to worry about electric shock accidents caused by exposed power lines. Furthermore, there is no need to worry about fires caused by electrical leakage or electrical sparks generated at the contacts of the current collection brushes, and especially in the case of coal, there is no danger of coal dust explosions, making it an extremely safe facility.

Of course, since a motor for rotating the rotary vanes is not required, the cost is low and maintenance is easy, and the overall cost is low, so it is economical enough even when applied to small-capacity silos.

[Brief explanation of drawings]

Figure 1 is a vertical sectional view showing a conventional rotary scraping device, Figure 2 is a vertical sectional view showing a rotary scraping device which is the first embodiment of this invention, and Figure 3 is B of Figure 2. 4 is an enlarged sectional view of section A in FIG. 2, and FIG. 5 is a sectional view taken along arrow C in FIG. 4. FIG. 6 is an explanatory diagram of the blade shape of a test model of a rotary blade, and FIG. 7 is a graph showing the results of the same test. 8 and 9 are vertical cross-sectional views showing rotary scraping devices according to the second and third embodiments of this invention, and FIG. 10 is a rotating blade switching device and a rotary blade switching device in the rotary scraping device shown in FIG. A plan view showing the deflection state of the rotary vanes, Figs. 11 and 12 are plan views of a rotary scraping device that pulls a cart with a cable wire, and Figs. 13 and 14 show a moving cart running with an endless chain. FIG. 2 is a plan view and a front view of a transfer section of the rotary scraping device.

Claims (1)

[Claims for Utility Model Registration] [1] A slit is provided at the bottom of a silo or slot bunker, etc., and particulate matter such as coal that slips out through the slit forms a mountain based on its angle of repose, which is sufficient to stabilize it. In a rotary scraping device that is received on a horizontal table having a width of ) Supports 17, 37a, 58 that are substantially perpendicular to the horizontal tables 3a, 33a are provided on a moving body such as the conveyor 14 or the carts 39, 50 that moves along the slits 4, 34, and the upper surface of the horizontal table on these supports is Rotary blades 7, 37, 59 are horizontally rotatably installed at adjacent height positions;
The movable bodies 14, 39 penetrate deeply into the piles of granular materials 5, 35 such as coal that have shifted upward.
50. A rotary scraping device such as a silo, which is characterized by having an outer diameter and a blade shape that rotate as the material moves. [2] The rotating blades 7, 37, and 59 are characterized in that the blade shape viewed perpendicularly to the center line of rotation is formed in a radial arc shape, an involute shape, or a dogleg shape. The rotary scraping device according to scope 1.