JP4443264B2 - Vertical impact crusher - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a dead stock type vertical impact crusher, and more particularly to a vertical impact type crusher capable of obtaining a product having a good particle shape.

  A vertical impact crusher is used to crush raw materials (raw raw materials) such as rocks and ores mainly for sandmaking. The vertical impact crusher is roughly divided into the anvil method and the dead stock method, depending on the material crushing type. The anvil type is mainly used for the purpose of reducing the size of the raw material. On the other hand, the dead stock type vertical impact crusher is mainly used for preparing the particle shape of a raw material that has already been crushed to a desired size. In this dead stock type crusher, a raw material deposited layer formed from crushed pieces deposited in a crushing chamber is discharged to the outside of the rotor from the discharge port on the outer periphery of the rotor by centrifugal force. It is made to collide with (dead stock) and crushed and shaped by rolling, sliding, etc. on the inclined surface of the raw material deposition layer.

  FIG. 11 shows a conventional example of such a dead stock type vertical impact crusher (Japanese Patent Publication No. 6-38923). FIG. 12 is an operation explanatory view of the vertical impact crusher shown in FIG. As shown in FIGS. 11 and 12, a chamfering chamber 52 around the rotor 51 is clogged with a peripheral edge of the bottom of the raw material deposition layer 53 and a cylindrical ring for reducing the amount of fine powder adhering to the product ( Fine powder adhesion removing means) 55 is provided.

As shown in FIG. 12, in this conventional vertical impact crusher, the raw material jumping out of the rotor 51 collides with the raw material deposition layer 53 deposited in the crushing chamber 52 and is crushed. The crushed pieces 54 roll, jump, slide, etc. on the raw material deposition layer 53 to adhere fine powder and dust, and fall from between the rotor 51 and the ring 55 in this state. Most of the raw material that jumps out of the rotor 51 collides with the raw material deposition layer 53, but part of it collides with the crushing piece 54 that falls between the rotor 51 and the ring 55, thereby causing the crushing piece 54 to collide with the ring 55. , Remove the fine powder and dust that adheres when struck. The crushing piece 54 that falls between the rotor 51 and the ring 55 also collides with another crushing piece that collides with the raw material deposition layer 53 and scatters and bounces off the casing liner 56 and the rotor 51. As a result, the crushed pieces 54 collide with the ring 55 in the same manner, and fine powder and dust are dropped. Thus, by providing the ring 55 in the crushing chamber 52, the amount of fine powder and dust adhering to the product is reduced, and the quality of the product is improved.
Japanese Examined Patent Publication No. 6-38923 (Fig. 1-2)

  However, in the conventional vertical impact crusher described above, the ring 55 has a cylindrical shape and has a collision surface extending in the vertical vertical direction, so that most of the collision with the ring 55 stays in the crushing chamber 52. It will fall as it is without. For this reason, there has been a problem that a product having an angular particle shape is mixed into the product.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vertical impact crusher capable of obtaining a product having a good particle shape.

In order to achieve the above object, the present invention is configured as follows. The invention of claim 1 includes a crushing chamber and a rotor that is provided in the crushing chamber and rotates at a high speed, and discharges the raw material charged into the rotor from the discharge port on the outer periphery of the rotor by centrifugal force. In a vertical impact crusher that collides with the raw material deposition layer to be formed and crushes it, and drops the product from between the rotor and the raw material deposition layer, the rotor inclines upward in the radial direction of the rotor in the crushing chamber. The upper inclined surface is held to a position below the opening of the discharge port so that a part of the material discharged from the discharge port on the outer periphery of the rotor collides and repels upward, and the bottom peripheral portion of the material deposition layer is damped. A dampening member is provided.

  According to a second aspect of the present invention, in the vertical impact crusher according to the first aspect, the damming member is provided over the entire circumference in the crushing chamber.

  According to a third aspect of the present invention, in the vertical impact crusher according to the first or second aspect, an angle formed by the upward inclined surface of the damming member and the axis of the rotor is set in a range of 10 to 70 °. It is characterized by that.

  According to a fourth aspect of the present invention, in the vertical impact crusher according to any one of the first to third aspects, the rotor has a striker that faces the upward inclined surface at a rotor outer peripheral position. It is characterized by.

  According to a fifth aspect of the present invention, in the vertical impact crusher according to the fourth aspect, the damming member is moved forward and backward in the vertical vertical direction to adjust the clearance distance between the damming member and the striker. A device is provided.

  According to a sixth aspect of the present invention, in the vertical impact crusher according to the fifth aspect, the damming member advancing / retreating device is configured to be operable by an operation from outside the body.

  The vertical impact crusher according to claim 1 has an upward inclined surface inclined upward in the radial direction of the rotor in the crushing chamber, and a damming member for clogging the skirt peripheral edge of the raw material deposition layer by the upward inclined surface. I have. Therefore, a part of the raw material released from the rotor collides with the upward inclined surface of the damping member and is repelled upward, so that it easily stays in the crushing chamber and has an opportunity to collide with other raw materials or raw material deposition layers. Increases the rounded grain shape. In this way, a product having a good particle shape can be obtained as compared with a conventional vertical impact crusher provided with a cylindrical ring having a collision surface extending in the vertical vertical direction.

  The vertical impact crusher of claim 2 is provided with a damming member over the entire circumference in the crushing chamber. Therefore, the particle shape can be further improved as compared with the case where the damming members are provided at appropriate intervals in the circumferential direction in the crushing chamber.

  Further, as in the vertical impact crusher according to claim 3, the angle between the upwardly inclined surface and the axis of the rotor of the dam member is preferably set within a range of 10 to 70 °. When the angle is less than 10 °, the effect of improving the particle shape cannot be obtained by repelling the raw material colliding with the damming member upward. On the other hand, if it exceeds 70 °, it will no longer serve as a clogging for the raw material deposition layer. Therefore, the setting range of the angle formed by the upwardly inclined surface of the damping member and the rotor axis is preferably 10 to 70 °, and more preferably 15 to 60 °.

  According to a fourth aspect of the present invention, the vertical impact crusher includes a rotor provided with a hammer (hammer) facing the upward inclined surface at an outer peripheral position of the rotor. Therefore, since the raw material flowing down on the upward inclined surface of the damming member from the upper part of the raw material deposition layer and the raw material which collided with the upward inclined surface of the damming member and repelled upward can be crushed by the striker, it is efficiently crushed. It can be performed.

  The vertical impact crusher according to a fifth aspect of the present invention includes a damming member advancing / retreating device that adjusts a clearance distance between the upward inclined surface of the damming member and the striker by moving the damming member forward and backward in the vertical and vertical directions. When the striker or the damming member wears, the gap distance between the two becomes large, the probability that the raw material will collide with the striker is reduced, and the crushing force at the time of the collision is also reduced, so the crushing capacity (crushing efficiency) is reduced. . Therefore, since the vertical impact crusher of claim 5 is equipped with such a damming member advancing / retreating device, when reducing the crushing capacity and recovering the crushing capacity or adjusting the product particle size, Since the gap distance can be adjusted without exchanging the striker and the clogging member, the operation stop time can be shortened, and the crusher operating rate can be improved.

  The vertical impact crusher of claim 6 is configured such that the dam member advancement / retraction device can be operated by an operation from the outside of the machine body. Therefore, the gap distance can be adjusted without stopping the crusher, and the crusher operating rate can be further improved.

  The vertical impact crusher according to the present invention is configured to include a damming member that has an upward inclined surface that is inclined upward in the radial direction of the rotor in the crushing chamber and that clogs the skirt peripheral edge of the raw material deposition layer. Yes. As a result, a part of the raw material released from the rotor collides with the upward inclined surface of the damping member and is repelled upward, so that it easily stays in the crushing chamber and does not collide with other raw materials or raw material deposition layers. Opportunities increase, resulting in better rounded grain shape, better grain shape than conventional vertical impact crusher with cylindrical ring with impact surface extending vertically up and down Can be obtained.

  Moreover, in addition to obtaining a product having a good particle shape by the damming member, the one provided with the rotor having the striker can be efficiently crushed.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a configuration of a vertical impact crusher according to a first embodiment of the present invention, and FIG. 2 is a plan view of the vertical impact crusher shown in FIG. In FIG. 2, the feed tube and the rotor top plate are not shown.

  As shown in FIG.1 and FIG.2, the upper casing 2 which has the crushing chamber 1 inside is provided, and the rotor 6 is arrange | positioned in the crushing chamber 1 which makes | forms columnar space. The rotor 6 is provided at the upper end of a vertical rotation shaft 7 that is rotatably supported in the lower casing 3 below the upper casing 2 and is driven to rotate by a motor (not shown). A product outlet 4 is provided in the lower casing 3.

  The rotor 6 has a hollow cylindrical shape having a discharge port on the outer peripheral surface as a whole. The rotor 6 has a circular plate shape and has a through hole at the center thereof. The rotor bottom plate 6b fixed to the upper end portion of the vertical rotation shaft 7 fitted in the through hole, and the rotor bottom plate 6b A rotor disk (distribution plate) 6c provided at the center of the upper surface and a through hole in which a feed pipe 5 to which a raw material is supplied is disposed at the center of the rotating disk (distribution plate) 6c. The rotor top plate 6a disposed in parallel with the rotor bottom plate 6b, and the rotor bottom plate 6b and the rotor top plate 6a are provided at equal intervals of 120 ° along the outer periphery of the rotor bottom plate 6b. The three dead stock forming walls 6e and the three projection chips 6d are formed. Each of the three dead stock forming walls 6e includes a long side portion extending in an arc shape along the outer periphery of the circular shape of the rotor bottom plate 6b, and a rotor radial inner side from the upstream end in the rotor rotation direction at the long side portion. And a short side portion extending to the side. In the present embodiment, the rotor 6 has three discharge ports 6f for discharging raw materials by arranging three dead stock forming walls 6e at equal intervals. The three projection chips 6d are respectively arranged on the upstream side in the rotor rotation direction at each discharge port 6f. In addition, although the thing of the structure which has the three discharge ports 6f was shown in this embodiment, it is good also as a structure which has the number of discharge ports 6f other than this.

  In the crushing chamber 1, an upper casing bottom plate 2a that constitutes an upper casing 2 and has an annular shape is disposed horizontally. As shown in FIG. 1, the upper casing bottom plate 2 a has a larger diameter than the rotor 6 and has a through hole concentric with the rotor 6, and is positioned slightly below the rotor bottom plate 6 b of the rotor 6. The upper casing bottom plate 2a and the side wall of the upper casing 2 form a raw material deposition layer 11 having a substantially right-angled triangular cross section on the inner periphery of the crushing chamber 1. A wear-resistant liner (not shown) is provided on the inner surface of the upper casing 2.

  The upper casing bottom plate 2a has a circular inner peripheral edge (peripheral peripheral edge) having an upward inclined surface 8a inclined upward in the radial direction of the rotor 6, and the bottom peripheral edge of the raw material deposition layer 11 is formed. A plate-like damming member 8 having an inverted frusto-conical cylindrical shape that dams the entire circumference is attached. The dam member 8 is made of a wear resistant material.

  In the vertical impact crusher configured as described above, the raw material charged into the rotor 6 rotating at high speed from the feed pipe 5 is accelerated by the dead stock 6h in the rotor 6 and is discharged from the discharge port 6f on the outer periphery of the rotor 6. Released. Since most of the raw material released from the rotor 6 collides with the raw material deposition layer 11 and is crushed, it is a dead stock type product with a good grain shape. In addition to this, a part of the raw material released from the rotor 6 collides with the upward inclined surface 8a of the damming member 8 and is repelled upward, so that it easily stays in the crushing chamber 1, and other raw materials and upper parts Since the chance of collision with the inner surface of the casing 2 and the raw material deposition layer 11 is increased, the rounded grain shape is improved. In this way, a product having a good particle shape can be obtained as compared with a conventional vertical impact crusher provided with a cylindrical ring having a collision surface extending in the vertical vertical direction.

  In the first embodiment, the single damming member 8 is provided as the damming member having an upwardly inclined surface over the entire circumference of the inner peripheral edge of the upper casing bottom plate 2a. It is also possible to provide a plurality of damming members at predetermined intervals in the circumferential direction at the peripheral edge.

  FIG. 3 is a cross-sectional view showing another example of the damming member according to the present invention. As shown in FIG. 3, the dam member 9 is formed in a plate shape with an inverted truncated cone shape, and an upward inclined surface that is inclined upward in the radial direction of the rotor 6 is formed as a curved surface. It is also possible to use the damming member 9 configured as described above.

  4A and 4B are diagrams showing another example of the damming member according to the present invention, in which FIG. 4A is a cross-sectional view and FIG. 4B is a plan view. As shown in FIG. 4, the damming member 10 includes a plurality of box-like bodies arranged in series along the inner peripheral edge of the upper casing bottom plate 2a, and a plurality of box-like bodies arranged on the same. It is one that is stacked. Each box-like body is curved in plan view so as to follow the circular inner peripheral edge of the upper casing bottom plate 2a (see FIG. 4 (b)), and has two surfaces extending along the inner peripheral edge. (A surface facing the rotor and a surface facing the side wall of the upper casing 2) are opened. Further, as shown in FIG. 4A, each box-like body has an opening formed by obliquely cutting a surface facing the rotor, and an end surface 10a thereof forming a discontinuous upward inclined surface. When the crusher is used, the upper and lower two-stage internal spaces having the opening are partitioned by crushing pieces that are filled and accumulated, and as a result, a continuous upward inclined surface that is flush with the end surface 10a is formed. As in this embodiment, the damming member according to the present invention does not necessarily have to have a continuous upward inclined surface, and may be constituted by a plurality of discontinuous end surfaces. Further, the damming member according to the present invention may be an integral structure or may be an integral combination of divided structures.

  FIG. 5 is a cross-sectional view showing a configuration of a vertical impact crusher according to a second embodiment of the present invention, and FIG. 6 is a plan view of the vertical impact crusher shown in FIG. In FIG. 6, the feed tube, the rotor top plate, and the baffle member advance / retreat apparatus are not shown. Here, since the rotor has a striking element, and the dam member is provided with a dam member advancing / retreating device with respect to the dam plate, the structure is the same as that of the first embodiment. The same reference numerals are given to the portions, description thereof is omitted, and different points will be described.

  As shown in FIGS. 5 and 6, the rotor 6 is made of a wear-resistant material at every 120 ° on the outer periphery of the rotor, and has a hammer 6 g facing the upward inclined surface 8 a of the damming member 8. Yes. The three striking elements 6g having a prismatic shape are attached to the dead stock forming wall 6e of the rotor 6 so as to protrude outward from the outer periphery of the rotor. In the present embodiment, the lower end portion of the damming member 8 is projected to the rotor 6 side so that the lower end portion of the damming member 8 and the striker 6g are close to each other in plan view when viewed from above the rotor 6. However, it may be configured to overlap.

  Further, as shown in FIG. 5, the damming member 8 is moved forward and backward in the vertical and vertical directions at locations corresponding to the three striking elements 6g in the lower casing 3, so that the upward sloping surface 8a of the damming member 8 and A dam member advancing / retreating device 12 is provided for adjusting the gap distance with the striker 6g.

  In this embodiment, the dam member advancing / retreating device 12 supports the hydraulic jack 13 in which the piston rod 13a is detachably fixed to the lower surface of the upper casing bottom plate 2a, the dam member 8, and the cylinder body of the hydraulic jack 13. An L-shaped retaining plate support arm 14 fixed to the outer periphery so as to be attachable / detachable. The hydraulic jack 13 is supported by the upper casing bottom plate 2a by screwing a screw portion provided at the tip of the piston rod 13a with a screw portion provided on the lower surface of the upper casing bottom plate 2a. Further, a threaded portion is provided in the through-hole portion of the damming plate support arm 14, and the cylinder body is screwed into the threaded portion of the damming plate support arm 14 by threading the outer peripheral surface of the cylinder body of the hydraulic jack 13. Thus, the damming plate support arm 14 is fixed to the cylinder body of the hydraulic jack 13. Therefore, when the cylinder body of the hydraulic jack 13 moves up and down, the dam member 8 moves forward and backward in the vertical vertical direction. A protective cover (not shown) for protecting the hydraulic jack 13 is provided in the lower casing 3 so that the product falling to the product outlet 4 does not hit the hydraulic jack 13 directly. In this embodiment, the hydraulic jack 13 is used as a drive source. However, the present invention is not limited to this, and a screw jack or the like may be used.

  According to the vertical impact crusher configured as described above, coarse raw materials (crushed pieces) flowing down along the upward inclined surface 8a of the damming member 8 from the upper part of the raw material accumulation layer 11, and the upward inclined surface of the damming member 8 Since the raw material (crushed piece) which collided with the 8a portion and repels upward can be crushed by the impactor 6g, in addition to obtaining a product having a good particle shape by the damming member 8, efficient crushing is achieved. It can be carried out.

  In addition, as shown in FIG. 7, the crushing pieces that flow down along the upward inclined surface 8a have a coarse surface with coarse grain (for example, a particle size exceeding 3 mm) and a fine particle with a fine grain (for example, a particle size of 2.5 mm) in the lower layer. Under). Therefore, it is possible to adjust the position of the damming member 8 in the vertical vertical direction so that the product size is not applied to the impactor 6g, and the oversized product is crushed by the impactor 6g in the surface layer portion. Good. By doing so, it is possible to prevent the product having the product size from being excessively crushed, so that generation of fine powder due to excessive crushing can be suppressed and useless power consumption can be eliminated.

  By the way, when the striker 6g and the damming member 8 are worn, the gap distance between the two becomes large, the collision probability of the raw material is lowered, and the crushing force at the time of the collision is also lowered, so that the crushing ability (crushing efficiency) is lowered. It will be. On the other hand, since the damming member advancing / retreating device 12 is provided, when the crushing capacity is reduced and the crushing capacity is restored or the product granularity is adjusted, the impactor 6g and the damming member 8 are not replaced. Since the gap distance between the upward inclined surface 8a and the striker 6g can be adjusted, the stop time of the vertical impact crusher can be shortened, and the crusher operating rate can be improved.

  The dam member advancing / retreating device 12 can be operated by an operation from the outside of the machine body by pulling out a driving hose of the hydraulic jack 13 to the outside of the machine body. Thereby, the gap distance can be adjusted without stopping the crusher, and the crusher operating rate can be further improved.

  FIG. 8 is a plan view showing a main part of a rotor of a vertical impact crusher according to another embodiment of the present invention. FIG. 8 shows the rotor with the rotor top plate removed.

  As a whole, the rotor 16 has a hollow triangular prism shape having an opening through which a raw material is projected on the outer peripheral surface. As shown in FIG. 8, the rotor 16 has a substantially equilateral triangular plate shape and has a through hole at the center thereof, and the vertical rotation shaft 7 (see FIG. 1) fitted in the through hole. A rotor bottom plate 16b fixed to the upper end portion, a rotating disk (distribution plate) 16c provided at the center of the upper surface of the rotor bottom plate 16b, and a substantially equilateral triangular plate shape, and a raw material at the center thereof A feed pipe 5 (refer to FIG. 1) to which is supplied, a rotor top plate (not shown) disposed in parallel with the rotor bottom plate 16b above the rotor bottom plate 16b, the rotor bottom plate 16b, 3 provided between the rotor top plate and the outer periphery of the rotor bottom plate 16b along a substantially triangular outer periphery, and at an equal interval so as to form an opening (discharge port 16f) through which the raw material is projected. Two deadstock forming walls 16e and 3 A projection chip 16d, and is configured by a three striker 16g.

  Each of the three dead stock forming walls 16e for forming the dead stock 16h is linear along a part of one side of the outer periphery forming the triangular shape of the rotor bottom plate 16b, starting from one top of the rotor bottom plate 16b. And a short side portion extending inward in the rotor radial direction from the upstream end in the rotor rotation direction at the long side portion. The rotor 6 has three discharge ports 16f for discharging raw materials by providing three dead stock forming walls 16e. The three striking elements 16g each having a substantially prismatic shape (block shape) are provided at the top position of the rotor bottom plate 16b which is the rotor outer peripheral position. Each of the three projection chips 16d having a substantially prismatic shape (block shape) is provided adjacent to the striker 16g and facing the discharge port 16f.

  According to the vertical impact crusher including the rotor 16 configured in this way, when the rotor 16 rotates, the long side portion of the dead stock forming wall 16e is downstream of the rotor rotation direction on the striking element 16g side. It is located so as to gradually retreat toward the inner side of the rotor from the side toward the upstream side in the rotor rotation direction, which is the short side portion side. This reduces the chance that the crushed pieces that have bounced off from the raw material deposition layer 11 and the damming member 8 collide with the outer surface of the long side portion of the dead stock forming wall 16e, so that the dead stock forming wall 16e is less worn and its life is reduced. Can be long. Moreover, since the opportunity for the crushing piece which does not collide with the dead stock formation wall 16e to collide with the striker 16g increases, crushing can be performed more efficiently.

  FIG. 9 is a plan view showing a main part of a rotor of a vertical impact crusher according to another embodiment of the present invention. FIG. 9 shows the rotor with the rotor top plate removed.

  The rotor 26 has a hollow quadrangular prism shape having an opening through which the raw material is projected on the outer peripheral surface as a whole. As shown in FIG. 9, the rotor 26 has a substantially square plate shape and has a through hole at the center thereof. At the upper end of the vertical rotating shaft 7 (see FIG. 1) fitted in the through hole, A fixed rotor bottom plate 26b, a rotating disk (distribution plate) 26c provided at the center of the upper surface of the rotor bottom plate 26b, and a substantially square plate shape, and raw materials are supplied to the center thereof. A rotor top plate (not shown) having a through-hole in which the feed pipe 5 (see FIG. 1) is arranged and arranged in parallel with the rotor bottom plate 26b above the rotor bottom plate 26b, the rotor bottom plate 26b, and the rotor top plate The four dead stock forming walls provided along the outer periphery of the rotor bottom plate 26b in a rectangular shape and at equal intervals so as to form an opening (discharge port 26f) through which the raw material is projected. 26e and four projection channels And flop 26 d, is formed by the four striker 26 g.

  Each of the four dead stock forming walls 26e for forming the dead stock 26h is linear along a part of one side of the outer periphery forming the rectangular shape of the rotor bottom plate 26b, starting from one top of the rotor bottom plate 26b. And a short side portion extending inward in the rotor radial direction from the upstream end in the rotor rotation direction at the long side portion. The rotor 26 has four discharge ports 26f for discharging raw materials by providing four dead stock forming walls 26e. Each of the four striking elements 26g having a substantially prismatic shape (block shape) is provided at the top position of the rotor bottom plate 26b, which is the rotor outer peripheral position. The four projection chips 26d having a substantially prismatic shape (block shape) are provided adjacent to the striker 26g and facing the discharge port 26f.

  According to the vertical impact crusher including the rotor 26 configured as described above, when the rotor 26 rotates, the long side portion of the dead stock forming wall 26e is downstream of the striking element 26g side in the rotor rotation direction. It is positioned so as to gradually retreat toward the inner side of the rotor from the side toward the upstream side in the rotor rotation direction, which is the short side portion side. This reduces the chance that the crushed pieces that have bounced back from the raw material deposition layer 11 and the damming member 8 collide with the outer surface of the long side portion of the dead stock forming wall 26e. Can be long. Moreover, since the opportunity for the crushing piece which does not collide with the dead stock formation wall 26e to collide with the striker 26g increases, crushing can be performed more efficiently.

  FIG. 10 is a plan view showing a main part of a rotor of a vertical impact crusher according to another embodiment of the present invention. FIG. 10 shows the rotor with the rotor top plate removed.

  As shown in FIG. 10, the rotor 36 has a pinion-like plate shape formed by cutting and removing the outer peripheral portion of the disc into a semi-crescent shape at a 90 ° pitch, and a through hole is formed at the center thereof. And a rotor bottom plate 36b fixed to the upper end portion of the vertical rotation shaft 7 (see FIG. 1) fitted in the through hole, and a rotating disk (distribution plate) provided at the center of the upper surface of the rotor bottom plate 36b. 36c and a rotor-shaped plate like the rotor bottom plate 36b, and has a through hole in which a feed pipe 5 (see FIG. 1) to which a raw material is supplied is disposed at the center thereof, and the rotor bottom plate 36b A rotor top plate (not shown) disposed above and parallel to the rotor bottom plate 36b, and four dead provided between the rotor bottom plate 36b and the rotor top plate along an arcuate portion of the outer periphery of the rotor bottom plate 36b. Stock forming wall 36e and 4 A projection chip 36d, is constituted by the four striker 36 g.

  The four dead stock forming walls 36e for forming the dead stock 36h each have a long side extending along an arc-shaped portion on the outer periphery of the rotor bottom plate 36b, starting from one top (projecting portion) of the rotor bottom plate 36b. And a short side portion extending inward in the rotor radial direction from the upstream end in the rotor rotation direction at the long side portion. The rotor 36 has four discharge ports 36f for discharging raw materials by providing four dead stock forming walls 36e. Each of the four striking elements 36g having a substantially prismatic shape (block shape) is provided at the top position of the rotor bottom plate 36b which is the rotor outer peripheral position. The four projection chips 36d having a substantially prismatic shape (block shape) are provided adjacent to the striker 36g and facing the discharge port 36f at the most recessed position on the outer periphery of the rotor. Yes.

  According to the vertical impact crusher including the rotor 36 configured as described above, when the rotor 36 rotates, the long side portion of the dead stock forming wall 36e is downstream of the striking piece 36g side in the rotor rotation direction. It is located so as to gradually retreat toward the inner side of the rotor from the side toward the upstream side in the rotor rotation direction that is the short side portion side. As a result, there is less chance that the crushed pieces bounced off from the raw material deposition layer 11 and the damming member 8 will collide with the long side portion of the dead stock forming wall 36e, so that the wear of the dead stock forming wall 36e is reduced and its life is extended. be able to. Moreover, since the opportunity for the crushing piece which does not collide with the dead stock formation wall 36e to collide with the striker 36g increases, it can crush more efficiently. In addition, about the striker and the projection chip | tip in this invention, not only a prismatic thing but the thing of arbitrary shapes can be employ | adopted as long as a hit | damage function or a projection function is not impaired.

It is sectional drawing which shows the structure of the vertical impact type crusher by 1st Embodiment of this invention. It is a top view of the vertical impact crusher shown in FIG. It is sectional drawing which shows another example of the damping member which concerns on this invention. It is a figure which shows another example of the damping member which concerns on this invention, Comprising: The (a) is sectional drawing, The (b) is a top view. It is sectional drawing which shows the structure of the vertical impact type crusher by 2nd Embodiment of this invention. It is a top view of the vertical impact crusher shown in FIG. It is a figure for demonstrating the mode of the crushing piece which flows down along the upward inclined surface of a damping member. It is a top view which shows the principal part of the rotor of the vertical impact crusher by other embodiment of this invention. It is a top view which shows the principal part of the rotor of the vertical impact crusher by other embodiment of this invention. It is a top view which shows the principal part of the rotor of the vertical impact crusher by other embodiment of this invention. It is sectional drawing which shows the structure of the conventional vertical impact crusher. It is action | operation explanatory drawing of the vertical impact crusher shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Crushing chamber 2 ... Upper casing 2a ... Upper casing bottom plate 3 ... Lower casing 4 ... Product take-out port 5 ... Feed pipe 6, 16, 26, 36 ... Rotor 6a, 16a, 26a, 36a ... Rotor top plate 6b, 16b, 26b, 36b ... Rotor bottom plate 6c, 16c, 26c, 36c ... Rotating disc 6d, 16d, 26d, 36d ... Projection tip 6e, 16e, 26e, 36e ... Dead stock forming wall 6f, 16f, 26f, 36f ... Release port 6g, 16g, 26g, 36g ... Batter 6h, 16h, 26h, 36h ... Dead stock 7 ... Vertical rotating shaft 8-10 ... Damping member 8a ... Upward inclined surface 11 ... Raw material deposition layer 12 ... Damping member advancing / retreating device 13 ... Hydraulic pressure Jack 13a ... Piston rod 14 ... Damping plate support arm

Claims (6)

A crushing chamber and a rotor that is provided in the crushing chamber and rotates at high speed, and the raw material charged in the rotor is discharged from the discharge port on the outer periphery of the rotor by centrifugal force, and is formed on the raw material deposition layer formed in the crushing chamber. crushed by the collision, the vertical impact crusher for dropping from between the products and the rotor said material deposited layer, said crushing chamber, said rotor upwardly inclined surface inclined upwardly to the rotor radially outwardly A clogging member is provided that holds the bottom edge of the raw material deposition layer to a position below the opening of the discharge port so that a part of the material discharged from the discharge port on the outer periphery collides and repels upward. A vertical impact crusher characterized by   2. The vertical impact crusher according to claim 1, wherein the damming member is provided over the entire circumference in the crushing chamber.   The vertical impact crusher according to claim 1 or 2, wherein an angle formed by the upward inclined surface of the damming member and the axis of the rotor is set in a range of 10 to 70 °.   The vertical impact crusher according to any one of claims 1 to 3, wherein the rotor has a striker facing the upward inclined surface at a rotor outer peripheral position.   5. The vertical impact crushing device according to claim 4, further comprising a damming member advancing / retreating device that adjusts a clearance distance between the damming member and the striker by moving the damming member vertically in the vertical direction. Machine. 6. The vertical impact crusher according to claim 5, wherein the dam member advancing / retreating device is configured to be operable by an operation from outside the airframe.