JP5728067B1 - Grinding equipment - Google Patents

Abstract

A surface of a pulverizing table and a pulverizing roller is smoothly ground into a predetermined shape. A main body 1 provided in a grinding chamber so as to be movable up and down, an arm 4 provided horizontally at a lower end portion of the main body 1 via a rotating shaft 2, and a main body 1 And a main biasing member 5 that biases the arm 4 downward is provided. When the rotating grindstone 3 is pressed against the crushing table or the like, the arm 4 is rotated upward against the urging force of the main urging member 5. As described above, since the arm 4 can be freely rotated, the inclination of the arm 4 can be freely adjusted so as to follow the surface shape of the grinding table or the like. For this reason, it is possible to apply a constant grinding force over the entire surface of the grinding table and the like, and it is possible to smoothly grind the surface of the grinding table and the like into a predetermined shape. [Selection] Figure 1

Description

  The present invention relates to a grinding apparatus for grinding a surface of a crushing table surface or a crushing roller surface of a vertical mill that crushes a lump of coal or the like into a predetermined shape.

  When a lump of coal or the like is pulverized to a predetermined size, a crusher such as a vertical mill is generally used. As exemplified in Patent Document 1, the pulverization apparatus includes a pulverization table that rotates around a rotation shaft, and a pulverization roller that is provided to face the upper surface side of the pulverization table. A predetermined gap corresponding to the predetermined size is formed between the pulverizing table and the pulverizing roller. An object to be crushed such as coal is supplied to the pulverizing table, and the object to be pulverized is pulverized between the pulverizing table and the pulverizing roller.

  The crushing table and crushing roller of this crushing device are worn with crushing of the material to be crushed. When this wear occurs, the gap gradually expands and the object to be crushed cannot be strongly bitten. As a result, there arises a problem that the pulverization efficiency is lowered. Therefore, in this Patent Document 1, a grinding apparatus including a rotating grindstone that is movable in the vertical and horizontal directions in the grinding chamber is configured, and the surface of the grinding table and the grinding roller is ground into a predetermined shape with the rotating grindstone. Yes. Then, after the surface is ground, overlay welding is performed to regenerate the grinding table and grinding roller.

Japanese Patent No. 5165608

  In the grinding apparatus shown in Patent Document 1, since the rotating grindstone is fixed to the lower end portion of the grinding apparatus toward the lower side, for example, there is almost no horizontal inclination such as near the center of the inner bottom surface of the curved grinding table. In the absence, the rotating grindstone can be pressed (straight) along its surface normal. However, the rotating grindstone cannot be pressed along the surface normal of the inclined surface on the inclined surface such as near the inner surface of the grinding table. As described above, when the rotating grindstone cannot be pressed along the surface normal, the grinding force from the grinding apparatus cannot be sufficiently applied to the pulverizing table, and there is a problem that the grinding efficiency is lowered.

  Accordingly, an object of the present invention is to smoothly grind the surface of a grinding table or grinding roller into a predetermined shape.

  In order to solve the above-described problems, the present invention includes a main body that is movably provided in a grinding chamber, an arm that is provided at a lower end portion of the main body via a rotation shaft, and that holds a rotating grindstone, and the main body And a main biasing member that is interposed between the arms and biases the arms downward.

  In the state where the load is not applied to the rotating whetstone (the rotating whetstone and the crushing table are separated), the arm has its own weight and the upward support force by the main biasing member provided on the arm. Are in a position where they are balanced and rotated slightly downward from the horizontal direction around the rotation axis. When the rotating grindstone is pressed against the grinding table or the like, the arm rotates upward against the urging force of the main urging member. As described above, the arm can be freely rotated as the rotary grindstone is pressed against the grinding table or the like, so that the inclination of the arm can be adjusted freely along the surface shape of the grinding table or the like. Can do. Therefore, a constant grinding force can be applied over the entire surface (grinding surface) of the pulverizing table or the like, and the surface of the pulverizing table or the like can be smoothly ground into a predetermined shape.

  In the said structure, it is preferable to set it as the structure further equipped with the auxiliary | assistant urging member which can tilt the said rotating grindstone with respect to the said arm between the said arm and the said rotating grindstone.

  By providing the auxiliary biasing member in this way, the rotating grindstone can take an inclination angle different from the inclination angle of the arm, so that it is provided on the arm when the rotating grindstone is strongly pressed against the surface of the grinding table or the like. The rotating grindstone is tilted, and the pressing pressure can be partially released. For this reason, it can prevent that rotation of a rotating grindstone stops and grinding efficiency falls due to this pressing pressure.

  In each of the above configurations, it is preferable to further include an eccentric rocking mechanism for rocking the rotary grindstone along the axial direction of the rotation shaft of the rotary grindstone.

  By providing the eccentric oscillating mechanism in this way, the entire region hit by the rotating grindstone with the oscillation is uniformly ground. For this reason, only a specific part of the surface of the grinding table or the like is deeply ground as compared with other parts, and the rotating grindstone enters the deeply ground part, causing an excessive load on the rotating grindstone, and the rotation stops. And it can prevent that grinding efficiency falls.

  The present invention includes a main body that is movably provided in a grinding chamber, an arm that is provided at a lower end portion of the main body via a rotation shaft, and that holds a rotating grindstone, and is provided between the main body and the arm. And a main urging member that urges the arm downward. By urging the arm downward with the main urging member, the direction of the surface normal of the surface of the crushing table and the like can be matched with the pressing direction of the rotating grindstone by the arm. For this reason, it is possible to apply a constant grinding force over the entire surface of the grinding table and the like, and it is possible to smoothly grind the surface of the grinding table and the like into a predetermined shape.

The grinding apparatus which concerns on this invention is shown, (a) is a front view, (b) is a side view. 1 is a perspective view of the grinding apparatus shown in FIG. The front view which shows the effect | action of the main biasing member of the grinding apparatus shown in FIG. The front view which shows the effect | action of the auxiliary | assistant biasing member of the grinding apparatus shown in FIG. The perspective view which shows the eccentric rocking | fluctuation mechanism of the grinding apparatus shown in FIG. It is an arrow line view which follows the VI-VI line in FIG. 1, Comprising: (a) is the state which is not eccentric, (b) is the state which rocked and eccentric. FIG. 1 shows how the grinding apparatus shown in FIG. 1 is attached to the grinding chamber, (a) is a front view, and (b) is a side view.

  An embodiment of a grinding apparatus according to the present invention is shown in FIGS. This grinding device is provided in the grinding chamber in order to grind the surface of a grinding table or grinding roller used in a grinding device such as a vertical mill into a predetermined shape. The embodiment described below is merely an example, and the present invention is not limited to this embodiment.

  The grinding apparatus includes a main body 1 that is movable up and down in a grinding chamber, and an arm that holds an air-rotating rotary grindstone 3 that is provided horizontally at a lower end portion of the main body 1 via a rotation shaft 2. 4 and a main urging member 5 that is provided between the main body 1 and the arm 4 and urges the arm 4 downward (see FIGS. 1 and 2).

  The main body 1 is configured by providing two L-shaped plate-like members 6 and 6 arranged side by side in parallel while being spaced apart by a predetermined distance by a spacer 7, and the upper part thereof moves up and down the grinding device. It is fixed to the rod 9 of the air cylinder 8 for the purpose. A main urging member holder 10 for holding the main urging member 5 is provided on the upper portion of the main body 1, and the main urging member holder 10 has an upper end of the main spring 5 a (main urging member 5). The side is fixed.

  The arm 4 is a rectangular parallelepiped member, and can rotate up and down with respect to the main body 1 while being sandwiched between two plate-like members 6 and 6 (see FIG. 3). . The lower end side of the main spring 5 a is fixed to the upper portion of the arm 4. Further, on the upper part of the arm 4, a rotation restricting portion 11 that restricts the rotation angle of the arm 4 within a predetermined range is provided. The rotation restricting portion 11 includes an arm side base portion 12 fixed to the arm 4, a link 13 provided to be rotatable with respect to the arm side base portion 12, and a main body side base portion 14 fixed to the main body 1. Composed. A long hole 16 into which a shaft body 15 provided in the main body side base portion 14 is inserted is formed on the upper end side of the link 13, and the shaft body 15 can move up and down only within the long hole 16. The rotation angle of 4 is regulated.

  A holder 18 that is rotatable by a rotation shaft 17 is provided at the lower part of the arm 4. The holder 18 includes two plate-like members 19, 19 that are horizontally arranged side by side, four telescopic shaft bodies 20 provided between the plate-like members 19, 19, and each telescopic member. Four auxiliary springs 21 a (auxiliary urging members 21) that are provided coaxially with the shaft body 20 and urge the two plate-like members 19, 19 in a direction in which they are separated from each other are provided. Each of the auxiliary springs 21 a expands and contracts independently by the contact force between the pneumatic rotary grindstone 3 provided at the lower part of the holder 18 and the pulverizing table and the like. So that it can be freely tilted (see FIG. 4).

  Thus, by providing the auxiliary spring 21a and allowing the rotating grindstone 3 to take an inclination angle different from the inclination angle of the arm 4, when the rotating grindstone 3 is strongly pressed against the surface of a grinding table or the like, the arm The rotating grindstone 3 provided on 4 tilts and the pressing pressure can be partially released. For this reason, it can prevent that rotation of the rotating grindstone 3 stops and grinding efficiency falls due to this pressing pressure.

  An eccentric swing mechanism 22 that swings the arm 4 is provided on one end side of the arm 4. The eccentric oscillating mechanism 22 includes an air ratchet wrench 23 and an eccentric member 24 that causes the rotational force generated by the air ratchet wrench 23 to be eccentric to swing the holder 18 around the rotation axis. The eccentric member 24 has a rotating shaft 27 connected to the output shaft 26 of the air ratchet wrench 23 through a through hole 25 formed in the arm 4 and an eccentric shaft 28 that causes an eccentric rotational movement (FIG. 5). See).

  The holder 18 is provided with two guides 29 and 29 in parallel, and a guide roller 30 is provided between the guides 29 and 29 so as to be reciprocally movable therebetween. The guide roller 30 is attached to the eccentric shaft 28 of the eccentric member 24. When the air ratchet wrench 23 is operated, the eccentric member 24 rotates around the rotation shaft 27, and the guide roller 30 rotates eccentrically with the rotation. Then, the guide 29 (holder 18) provided with the guide roller 30 rotates around the rotation shaft 17 of the holder 18, and the rotating grindstone 3 attached to the holder 18 swings within a predetermined angular range ( (See FIG. 6).

  By swinging the rotary grindstone 3 in this way, the rotary grindstone 3 comes into contact over a wide area, and the surface of the grinding table or the like is uniformly ground. For this reason, only a specific portion of the surface of the grinding table or the like that is in contact with the rotating grindstone 3 is deeply ground as compared with the other portions, and the rotating grindstone 3 is fitted into the deeply grinded portion so that the rotating grindstone 3 It can be prevented that an excessive load is generated and the rotation is stopped to reduce the grinding efficiency.

  In this embodiment, the air ratchet wrench 23 is employed for the eccentric rocking mechanism 22, but a motor type can be employed instead. Moreover, although the air rotary type was employ | adopted as the rotating grindstone 3, a motor type can also be employ | adopted instead.

  The casing 31 of this grinding apparatus is supported by a beam 32 provided in the grinding chamber. A support frame 33 is accommodated in the casing 31, and an air cylinder 8 that moves the main body up and down is supported by the support frame 33 (see FIG. 7). After operating the vertical handle 35 provided at the end of the trapezoidal screw 34 provided in the vertical direction to move the entire grinding apparatus up and down to adjust the lower limit position of the rotating grindstone 3, the rod 9 of the air cylinder 8 is adjusted. The position of the rotary grindstone 3 in the vertical direction is adjusted by expanding and contracting. Further, the horizontal handle 37 provided at the end of the trapezoidal screw 36 provided in the horizontal direction is operated to move the support frame 33 along the rail 38 provided in the horizontal direction. Adjust the position of the direction.

  The grinding apparatus shown in the above embodiment is merely an example, and as long as the problem of the present invention that the surface of the grinding table or grinding roller is smoothly ground into a predetermined shape can be solved, the shape and quantity of each member The arrangement and the like can be changed as appropriate.

DESCRIPTION OF SYMBOLS 1 Main body 2 Rotating shaft 3 Rotating grindstone 4 Arm 5 Main urging member 5a Main spring 6 Plate-like member 7 Spacer 8 Air cylinder 9 Rod 10 Main urging member holder 11 Rotation restricting part 12 Arm side base 13 Link 14 Main body Side base 15 Shaft 16 Long hole 17 Rotating shaft 18 Holder 19 Plate member 20 Telescopic shaft 21 Auxiliary biasing member 21a Auxiliary spring 22 Eccentric swing mechanism 23 Air ratchet wrench 24 Eccentric member 25 Through hole 26 Output shaft 27 Rotation Shaft 28 Eccentric shaft 29 Guide 30 Guide roller 31 Housing 32 Beam 33 Support frame 34 Trapezoidal screw 35 Vertical handle 36 Trapezoidal screw 37 Horizontal handle 38 Rail

Claims (2)

A main body (1) provided movably in the grinding chamber;
An arm (4) for holding a rotating grindstone (3) provided on a lower end of the main body (1) via a rotating shaft (2);
A main biasing member (5) provided between the main body (1) and the arm (4) and biasing the arm (4) downward ;
Between the arm (4) and the rotating grindstone (3), an auxiliary urging member (21) that allows the rotating grindstone (3) to tilt with respect to the arm (4) ;
The auxiliary urging member (21) is provided in two lower parts of the arm (4), which are horizontally arranged side by side to constitute a holder (18) that is rotatable by a rotation shaft (17). Four auxiliary members (21) are provided between the plate-like members (19, 19). The auxiliary biasing members (21) are independent of each other by the contact force between the rotating grindstone (3) and the grinding table. A grinding apparatus that expands and contracts to allow the rotating grindstone (3) to freely tilt with respect to the arm (4) . Said rotary grindstone (3), the grinding wheel (3) grinding apparatus according to claim 1, further comprising an eccentric oscillating mechanism for oscillating along the axial direction of the rotary shaft (22) of.

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