JPH0677694B2 - Rigid roller mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a vertical roller mill, and more particularly to a model having a cover for reversing and opening along with an inner roller unit with a fulcrum pin attached to a closed casing as a lower fulcrum. Is a new technology.

[Prior Art] As one of the vertical roller mills that have been highly evaluated by users, an outline of a pressurizing and sealing type roller mill will be described with reference to FIG. In the figure, a ring-shaped grinding liner 23 is fitted on the upper surface of a grinding table 22 that rotates horizontally. On the other hand, a trunnion 9a is swingably supported by a side wall of a casing 2a that surrounds the machine in a hermetically sealed manner, and a crushing roller 24 is rotatably mounted by inserting a shaft into the trunnion. Usually, a pressure device 26 is attached to the casing via an arm 25 in a direction to urge the outer peripheral surface of the crushing roller 24 against the surface of the crushing liner 23.

Two to four roller units 5a including such crushing rollers are mounted at equal intervals.

By the way, compared to the case where the target substance to be pulverized by the roller mill is always limited to one type, it is generally far more likely that a large number of types of pulverization should be aimed, at which time the pulverization work of the raw material A is completed. Then, before starting the crushing operation of the raw material B, it is necessary to clean and remove the pulverized powder of the raw material A which remains in the vertical roller mill.

For example, there are 50 to 60 types of talc in one bite, and the properties may differ slightly depending on the application. In particular, when it is used for food or for pharmacopoeia (medicine), it is necessary to inspect and clean the inside of the mill for each brand (every time switching) because contamination, color change, property change, etc. are extremely absent.

For this cleaning, the roller unit in the closed casing must be watered so that it can be touched by the operator, so it is necessary to invert and open the cover, and as shown in FIG. As a fulcrum, it is known that the cover 1a and the roller unit 5a are accompanied and opened in reverse.

[Problems to be Solved by the Invention] As shown in FIG. 4, a large number of bolts and nuts 27 are conventionally provided around the cover of a vertical roller mill to hermetically seal the casing. Therefore, when closing and opening the cover 1a, it was necessary for a person to use a work tool to fasten and loosen the bolts and nuts 27.

However, as mentioned earlier, the quality of the pulverized material is diverse,
Moreover, if severe conditions are imposed on the physical properties of the roller unit 5a, the management of the roller unit 5a must be severe, and the opportunities for opening and closing the cover are increasing. Therefore, the manual work by the operator to screw the bolts and nuts is
From the viewpoint of productivity, it has become an issue that needs to be solved because it now occupies elements that cannot be ignored.

In order to solve this problem, an object of the present invention is to provide a vertical roller mill that can convert a closed state and an open state with one touch.

[Means for Solving the Problems] The vertical roller mill according to the present invention is equipped with a power cylinder for locking the upper end of the cover and the casing and for canceling the fitting between the trunnion shaft of the roller unit and the casing. This has made it possible to solve the above problems.

[Operation] FIG. 1 and FIG. 2 are a front view and a side view (partially sectional view) showing an embodiment of the present invention. The operation of the present invention will be described based on this example.

The cover 1 is attached so as to cover the opening of the frame 3 of the hermetic casing 2, and can be reversed and opened (two-dot chain line in FIG. 1) together with the roller unit 5 with the fulcrum pin 4 as the lower fulcrum. This reversal opening is performed by the operation of the power cylinder 7 transmitted via the rod 6.

While the vertical roller mill is in operation, the cover 1 is in close contact with the frame in order to keep the dust that accompanies the crushing inside the casing, but this close contact with the casing at the top of the cover (in this example, Fitting of link 8) and trunnion shaft 9 and casing (half bearings 10A and 10B in this example)
Is fulfilled by and.

When the need arises, the power cylinder 11 is first operated to release the lock (link 8) between the frame 3 and the upper end of the cover 1 prior to the operation of the power cylinder 7, and continuously (or simultaneously). Restraint in which the trunnion bearing 9 is integrally fitted to the frame (in this example, the cover-side half of the half bearing is used).
10B) actuate power cylinder 12 to release.
When the power cylinder 7 is operated after releasing the processing points where the casing and the cover are in close contact with each other in this way, the cover is immediately inverted, which is a so-called one-touch inversion.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS.

The cover 1 is supported by a fulcrum pin 4 provided on a frame 3 and is opened and closed by a power cylinder 7 to a position indicated by an alternate long and short dash line. The trunnion shaft 9 of the roller unit 5 is fixed to the cover 1 and moves together with the cover.

The flange 13 of the frame 3 is provided with a slope on the upper side so that the facing surface is in close contact with the cover 1. A link 8 which is rotated by a pin 14 is provided on the top of the cover 1, and one end of the link 8 has a hook shape having a slope and the other end is connected to the power cylinder 11 by a pin 15 and a fork 16. When the power cylinder 11 is operated, the link 8 rotates to grip or release the sloped portion of the flange 13 and the cover 1. (See FIG. 1) Further, as shown in FIG. 2, a guide 17 is fixed to the end of the trunnion shaft 9 by a bolt 18, and a clamp ring 19 is slidably contacted with the outer periphery of the guide 17. One end of the clamp ring 19 fixes the rod 20 of the power cylinder 12 with a nut 21, and the other end is provided with a tapered portion on the inner surface. The power cylinder 12 is fastened to the guide 17 to linearly move the clamp ring 19 in the axial direction. The trussion shaft 9 is in close contact with the frame side half bearing 10A and is fixed to the cover side half bearing 10B. A taper portion is provided on the outer peripheral end of the bearing 10, and the taper portion of the clamp ring 19 is externally fitted so that the trunnion shaft 9 and the half bearings 10A and 10B come into close contact with each other. When the clamp ring 19 is moved leftward by the power cylinder 12, the trunnion shaft 9 and the shaft bearings of the half bearings 10A and 10B are disengaged, and the casing and the cover 1 are disengaged from each other so that they can be opened and closed.

[Effects of the Invention] By operating the power cylinders 11 and 12 as described above, the casing 2 and the cover 1 are disengaged, and the cover can be opened and closed by the operation of the power cylinder 7.

By changing the cover opening / closing work by human power using the conventional work tool to the opening / closing device using the power cylinder of the present invention, the work tool and human power are unnecessary, and the opening / closing time is shortened.

Therefore, the inside of the vertical roller mill can be easily cleaned and inspected, and it is possible to efficiently handle pulverization of various raw materials.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a side view (partial cross-section) of the same, FIG. 3 is a front cross-sectional view of a conventional technique, and FIG. . 1 ... Cover, 2 ... Casing 3 ... Frame, 4 ... Support pin 5 ... Roller unit, 7 ... Power cylinder 9 ... Trunnion shaft 10A / 10B ... Half bearing 11/12 ... Power cylinder

Claims (1)

[Claims] 1. A vertical roller mill having a cover in which a fulcrum pin attached to a closed casing serves as a lower end fulcrum to revolve and open with an internal roller unit, in which the upper end of the cover is locked between the casing and the roller unit. Vertical roller mills, each equipped with a power cylinder that releases the fitting between the trunnion shaft and the casing.